/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1990 Mentat Inc. */ #pragma ident "%Z%%M% %I% %E% SMI" #include #include #include #include #include #include #include #include #include #define _SUN_TPI_VERSION 2 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Values for squeue switch: * IP_SQUEUE_ENTER_NODRAIN: squeue_enter_nodrain * IP_SQUEUE_ENTER: squeue_enter * IP_SQUEUE_FILL: squeue_fill */ int ip_squeue_enter = 2; squeue_func_t ip_input_proc; /* * IP statistics. */ #define IP_STAT(x) (ip_statistics.x.value.ui64++) #define IP_STAT_UPDATE(x, n) (ip_statistics.x.value.ui64 += (n)) #define SET_BPREV_FLAG(x) ((mblk_t *)(uintptr_t)(x)) typedef struct ip_stat { kstat_named_t ipsec_fanout_proto; kstat_named_t ip_udp_fannorm; kstat_named_t ip_udp_fanmb; kstat_named_t ip_udp_fanothers; kstat_named_t ip_udp_fast_path; kstat_named_t ip_udp_slow_path; kstat_named_t ip_udp_input_err; kstat_named_t ip_tcppullup; kstat_named_t ip_tcpoptions; kstat_named_t ip_multipkttcp; kstat_named_t ip_tcp_fast_path; kstat_named_t ip_tcp_slow_path; kstat_named_t ip_tcp_input_error; kstat_named_t ip_db_ref; kstat_named_t ip_notaligned1; kstat_named_t ip_notaligned2; kstat_named_t ip_multimblk3; kstat_named_t ip_multimblk4; kstat_named_t ip_ipoptions; kstat_named_t ip_classify_fail; kstat_named_t ip_opt; kstat_named_t ip_udp_rput_local; kstat_named_t ipsec_proto_ahesp; kstat_named_t ip_conn_flputbq; kstat_named_t ip_conn_walk_drain; kstat_named_t ip_out_sw_cksum; kstat_named_t ip_in_sw_cksum; kstat_named_t ip_trash_ire_reclaim_calls; kstat_named_t ip_trash_ire_reclaim_success; kstat_named_t ip_ire_arp_timer_expired; kstat_named_t ip_ire_redirect_timer_expired; kstat_named_t ip_ire_pmtu_timer_expired; kstat_named_t ip_input_multi_squeue; kstat_named_t ip_tcp_in_full_hw_cksum_err; kstat_named_t ip_tcp_in_part_hw_cksum_err; kstat_named_t ip_tcp_in_sw_cksum_err; kstat_named_t ip_tcp_out_sw_cksum_bytes; kstat_named_t ip_udp_in_full_hw_cksum_err; kstat_named_t ip_udp_in_part_hw_cksum_err; kstat_named_t ip_udp_in_sw_cksum_err; kstat_named_t ip_udp_out_sw_cksum_bytes; kstat_named_t ip_frag_mdt_pkt_out; kstat_named_t ip_frag_mdt_discarded; kstat_named_t ip_frag_mdt_allocfail; kstat_named_t ip_frag_mdt_addpdescfail; kstat_named_t ip_frag_mdt_allocd; } ip_stat_t; static ip_stat_t ip_statistics = { { "ipsec_fanout_proto", KSTAT_DATA_UINT64 }, { "ip_udp_fannorm", KSTAT_DATA_UINT64 }, { "ip_udp_fanmb", KSTAT_DATA_UINT64 }, { "ip_udp_fanothers", KSTAT_DATA_UINT64 }, { "ip_udp_fast_path", KSTAT_DATA_UINT64 }, { "ip_udp_slow_path", KSTAT_DATA_UINT64 }, { "ip_udp_input_err", KSTAT_DATA_UINT64 }, { "ip_tcppullup", KSTAT_DATA_UINT64 }, { "ip_tcpoptions", KSTAT_DATA_UINT64 }, { "ip_multipkttcp", KSTAT_DATA_UINT64 }, { "ip_tcp_fast_path", KSTAT_DATA_UINT64 }, { "ip_tcp_slow_path", KSTAT_DATA_UINT64 }, { "ip_tcp_input_error", KSTAT_DATA_UINT64 }, { "ip_db_ref", KSTAT_DATA_UINT64 }, { "ip_notaligned1", KSTAT_DATA_UINT64 }, { "ip_notaligned2", KSTAT_DATA_UINT64 }, { "ip_multimblk3", KSTAT_DATA_UINT64 }, { "ip_multimblk4", KSTAT_DATA_UINT64 }, { "ip_ipoptions", KSTAT_DATA_UINT64 }, { "ip_classify_fail", KSTAT_DATA_UINT64 }, { "ip_opt", KSTAT_DATA_UINT64 }, { "ip_udp_rput_local", KSTAT_DATA_UINT64 }, { "ipsec_proto_ahesp", KSTAT_DATA_UINT64 }, { "ip_conn_flputbq", KSTAT_DATA_UINT64 }, { "ip_conn_walk_drain", KSTAT_DATA_UINT64 }, { "ip_out_sw_cksum", KSTAT_DATA_UINT64 }, { "ip_in_sw_cksum", KSTAT_DATA_UINT64 }, { "ip_trash_ire_reclaim_calls", KSTAT_DATA_UINT64 }, { "ip_trash_ire_reclaim_success", KSTAT_DATA_UINT64 }, { "ip_ire_arp_timer_expired", KSTAT_DATA_UINT64 }, { "ip_ire_redirect_timer_expired", KSTAT_DATA_UINT64 }, { "ip_ire_pmtu_timer_expired", KSTAT_DATA_UINT64 }, { "ip_input_multi_squeue", KSTAT_DATA_UINT64 }, { "ip_tcp_in_full_hw_cksum_err", KSTAT_DATA_UINT64 }, { "ip_tcp_in_part_hw_cksum_err", KSTAT_DATA_UINT64 }, { "ip_tcp_in_sw_cksum_err", KSTAT_DATA_UINT64 }, { "ip_tcp_out_sw_cksum_bytes", KSTAT_DATA_UINT64 }, { "ip_udp_in_full_hw_cksum_err", KSTAT_DATA_UINT64 }, { "ip_udp_in_part_hw_cksum_err", KSTAT_DATA_UINT64 }, { "ip_udp_in_sw_cksum_err", KSTAT_DATA_UINT64 }, { "ip_udp_out_sw_cksum_bytes", KSTAT_DATA_UINT64 }, { "ip_frag_mdt_pkt_out", KSTAT_DATA_UINT64 }, { "ip_frag_mdt_discarded", KSTAT_DATA_UINT64 }, { "ip_frag_mdt_allocfail", KSTAT_DATA_UINT64 }, { "ip_frag_mdt_addpdescfail", KSTAT_DATA_UINT64 }, { "ip_frag_mdt_allocd", KSTAT_DATA_UINT64 }, }; static kstat_t *ip_kstat; #define TCP6 "tcp6" #define TCP "tcp" #define SCTP "sctp" #define SCTP6 "sctp6" major_t TCP6_MAJ; major_t TCP_MAJ; major_t SCTP_MAJ; major_t SCTP6_MAJ; int ip_poll_normal_ms = 100; int ip_poll_normal_ticks = 0; /* * Structure to represent a linked list of msgblks. Used by ip_snmp_ functions. */ struct listptr_s { mblk_t *lp_head; /* pointer to the head of the list */ mblk_t *lp_tail; /* pointer to the tail of the list */ }; typedef struct listptr_s listptr_t; /* * This is used by ip_snmp_get_mib2_ip_route_media and * ip_snmp_get_mib2_ip6_route_media to carry the lists of return data. */ typedef struct iproutedata_s { uint_t ird_idx; listptr_t ird_route; /* ipRouteEntryTable */ listptr_t ird_netmedia; /* ipNetToMediaEntryTable */ listptr_t ird_attrs; /* ipRouteAttributeTable */ } iproutedata_t; /* * Cluster specific hooks. These should be NULL when booted as a non-cluster */ /* * Hook functions to enable cluster networking * On non-clustered systems these vectors must always be NULL. * * Hook function to Check ip specified ip address is a shared ip address * in the cluster * */ int (*cl_inet_isclusterwide)(uint8_t protocol, sa_family_t addr_family, uint8_t *laddrp) = NULL; /* * Hook function to generate cluster wide ip fragment identifier */ uint32_t (*cl_inet_ipident)(uint8_t protocol, sa_family_t addr_family, uint8_t *laddrp, uint8_t *faddrp) = NULL; /* * Synchronization notes: * * IP is a fully D_MP STREAMS module/driver. Thus it does not depend on any * MT level protection given by STREAMS. IP uses a combination of its own * internal serialization mechanism and standard Solaris locking techniques. * The internal serialization is per phyint (no IPMP) or per IPMP group. * This is used to serialize plumbing operations, IPMP operations, certain * multicast operations, most set ioctls, igmp/mld timers etc. * * Plumbing is a long sequence of operations involving message * exchanges between IP, ARP and device drivers. Many set ioctls are typically * involved in plumbing operations. A natural model is to serialize these * ioctls one per ill. For example plumbing of hme0 and qfe0 can go on in * parallel without any interference. But various set ioctls on hme0 are best * serialized. However if the system uses IPMP, the operations are easier if * they are serialized on a per IPMP group basis since IPMP operations * happen across ill's of a group. Thus the lowest common denominator is to * serialize most set ioctls, multicast join/leave operations, IPMP operations * igmp/mld timer operations, and processing of DLPI control messages received * from drivers on a per IPMP group basis. If the system does not employ * IPMP the serialization is on a per phyint basis. This serialization is * provided by the ipsq_t and primitives operating on this. Details can * be found in ip_if.c above the core primitives operating on ipsq_t. * * Lookups of an ipif or ill by a thread return a refheld ipif / ill. * Simiarly lookup of an ire by a thread also returns a refheld ire. * In addition ipif's and ill's referenced by the ire are also indirectly * refheld. Thus no ipif or ill can vanish nor can critical parameters like * the ipif's address or netmask change as long as an ipif is refheld * directly or indirectly. For example an SIOCLIFADDR ioctl that changes the * address of an ipif has to go through the ipsq_t. This ensures that only * 1 such exclusive operation proceeds at any time on the ipif. It then * deletes all ires associated with this ipif, and waits for all refcnts * associated with this ipif to come down to zero. The address is changed * only after the ipif has been quiesced. Then the ipif is brought up again. * More details are described above the comment in ip_sioctl_flags. * * Packet processing is based mostly on IREs and are fully multi-threaded * using standard Solaris MT techniques. * * There are explicit locks in IP to handle: * - The ip_g_head list maintained by mi_open_link() and friends. * * - The reassembly data structures (one lock per hash bucket) * * - conn_lock is meant to protect conn_t fields. The fields actually * protected by conn_lock are documented in the conn_t definition. * * - ire_lock to protect some of the fields of the ire, IRE tables * (one lock per hash bucket). Refer to ip_ire.c for details. * * - ndp_g_lock and nce_lock for protecting NCEs. * * - ill_lock protects fields of the ill and ipif. Details in ip.h * * - ill_g_lock: This is a global reader/writer lock. Protects the following * * The AVL tree based global multi list of all ills. * * The linked list of all ipifs of an ill * * The mapping * * The ipsq->ipsq_phyint_list threaded by phyint_ipsq_next * * The illgroup list threaded by ill_group_next. * * association * Insertion/deletion of an ill in the system, insertion/deletion of an ipif * into an ill, changing the mapping of an ill, insertion/deletion * of an ill into the illgrp list, changing the assoc of an ill * will all have to hold the ill_g_lock as writer for the actual duration * of the insertion/deletion/change. More details about the mapping * may be found in the IPMP section. * * - ill_lock: This is a per ill mutex. * It protects some members of the ill and is documented below. * It also protects the mapping * It also protects the illgroup list threaded by ill_group_next. * It also protects the assoc. * It also protects the list of ipifs hanging off the ill. * * - ipsq_lock: This is a per ipsq_t mutex lock. * This protects all the other members of the ipsq struct except * ipsq_refs and ipsq_phyint_list which are protected by ill_g_lock * * - illgrp_lock: This is a per ill_group mutex lock. * The only thing it protects is the illgrp_ill_schednext member of ill_group * which dictates which is the next ill in an ill_group that is to be chosen * for sending outgoing packets, through creation of an IRE_CACHE that * references this ill. * * - phyint_lock: This is a per phyint mutex lock. Protects just the * phyint_flags * * - ip_g_nd_lock: This is a global reader/writer lock. * Any call to nd_load to load a new parameter to the ND table must hold the * lock as writer. ND_GET/ND_SET routines that read the ND table hold the lock * as reader. * * - ip_addr_avail_lock: This is used to ensure the uniqueness of IP addresses. * This lock is held in ipif_up_done and the ipif is marked IPIF_UP and the * uniqueness check also done atomically. * * - ipsec_capab_ills_lock: This readers/writer lock protects the global * lists of IPsec capable ills (ipsec_capab_ills_{ah,esp}). It is taken * as a writer when adding or deleting elements from these lists, and * as a reader when walking these lists to send a SADB update to the * IPsec capable ills. * * - ill_g_usesrc_lock: This readers/writer lock protects the usesrc * group list linked by ill_usesrc_grp_next. It also protects the * ill_usesrc_ifindex field. It is taken as a writer when a member of the * group is being added or deleted. This lock is taken as a reader when * walking the list/group(eg: to get the number of members in a usesrc group). * Note, it is only necessary to take this lock if the ill_usesrc_grp_next * field is changing state i.e from NULL to non-NULL or vice-versa. For * example, it is not necessary to take this lock in the initial portion * of ip_sioctl_slifusesrc or at all in ip_sioctl_groupname and * ip_sioctl_flags since the these operations are executed exclusively and * that ensures that the "usesrc group state" cannot change. The "usesrc * group state" change can happen only in the latter part of * ip_sioctl_slifusesrc and in ill_delete. * * Changing , , assocications. * * To change the association, the ill_g_lock must be held * as writer, and the ill_locks of both the v4 and v6 instance of the ill * must be held. * * To change the association the ill_g_lock must be held as writer * and the ill_lock of the ill in question must be held. * * To change the association the ill_g_lock must be held as * writer and the ill_lock of the ill in question must be held. * * To add or delete an ipif from the list of ipifs hanging off the ill, * ill_g_lock (writer) and ill_lock must be held and the thread must be * a writer on the associated ipsq,. * * To add or delete an ill to the system, the ill_g_lock must be held as * writer and the thread must be a writer on the associated ipsq. * * To add or delete an ilm to an ill, the ill_lock must be held and the thread * must be a writer on the associated ipsq. * * Lock hierarchy * * Some lock hierarchy scenarios are listed below. * * ill_g_lock -> conn_lock -> ill_lock -> ipsq_lock * ill_g_lock -> illgrp_lock -> ill_lock * ill_g_lock -> ill_lock(s) -> phyint_lock * ill_g_lock -> ndp_g_lock -> ill_lock -> nce_lock * ill_g_lock -> ip_addr_avail_lock * conn_lock -> irb_lock -> ill_lock -> ire_lock * ill_g_lock -> ip_g_nd_lock * * When more than 1 ill lock is needed to be held, all ill lock addresses * are sorted on address and locked starting from highest addressed lock * downward. * * Mobile-IP scenarios * * irb_lock -> ill_lock -> ire_mrtun_lock * irb_lock -> ill_lock -> ire_srcif_table_lock * * IPsec scenarios * * ipsa_lock -> ill_g_lock -> ill_lock * ipsec_capab_ills_lock -> ill_g_lock -> ill_lock * ipsec_capab_ills_lock -> ipsa_lock * ill_g_usesrc_lock -> ill_g_lock -> ill_lock * * Trusted Solaris scenarios * * igsa_lock -> gcgrp_rwlock -> gcgrp_lock * igsa_lock -> gcdb_lock * gcgrp_rwlock -> ire_lock * gcgrp_rwlock -> gcdb_lock * * * Routing/forwarding table locking notes: * * Lock acquisition order: Radix tree lock, irb_lock. * Requirements: * i. Walker must not hold any locks during the walker callback. * ii Walker must not see a truncated tree during the walk because of any node * deletion. * iii Existing code assumes ire_bucket is valid if it is non-null and is used * in many places in the code to walk the irb list. Thus even if all the * ires in a bucket have been deleted, we still can't free the radix node * until the ires have actually been inactive'd (freed). * * Tree traversal - Need to hold the global tree lock in read mode. * Before dropping the global tree lock, need to either increment the ire_refcnt * to ensure that the radix node can't be deleted. * * Tree add - Need to hold the global tree lock in write mode to add a * radix node. To prevent the node from being deleted, increment the * irb_refcnt, after the node is added to the tree. The ire itself is * added later while holding the irb_lock, but not the tree lock. * * Tree delete - Need to hold the global tree lock and irb_lock in write mode. * All associated ires must be inactive (i.e. freed), and irb_refcnt * must be zero. * * Walker - Increment irb_refcnt before calling the walker callback. Hold the * global tree lock (read mode) for traversal. * * IPSEC notes : * * IP interacts with the IPSEC code (AH/ESP) by tagging a M_CTL message * in front of the actual packet. For outbound datagrams, the M_CTL * contains a ipsec_out_t (defined in ipsec_info.h), which has the * information used by the IPSEC code for applying the right level of * protection. The information initialized by IP in the ipsec_out_t * is determined by the per-socket policy or global policy in the system. * For inbound datagrams, the M_CTL contains a ipsec_in_t (defined in * ipsec_info.h) which starts out with nothing in it. It gets filled * with the right information if it goes through the AH/ESP code, which * happens if the incoming packet is secure. The information initialized * by AH/ESP, is later used by IP(during fanouts to ULP) to see whether * the policy requirements needed by per-socket policy or global policy * is met or not. * * If there is both per-socket policy (set using setsockopt) and there * is also global policy match for the 5 tuples of the socket, * ipsec_override_policy() makes the decision of which one to use. * * For fully connected sockets i.e dst, src [addr, port] is known, * conn_policy_cached is set indicating that policy has been cached. * conn_in_enforce_policy may or may not be set depending on whether * there is a global policy match or per-socket policy match. * Policy inheriting happpens in ip_bind during the ipa_conn_t bind. * Once the right policy is set on the conn_t, policy cannot change for * this socket. This makes life simpler for TCP (UDP ?) where * re-transmissions go out with the same policy. For symmetry, policy * is cached for fully connected UDP sockets also. Thus if policy is cached, * it also implies that policy is latched i.e policy cannot change * on these sockets. As we have the right policy on the conn, we don't * have to lookup global policy for every outbound and inbound datagram * and thus serving as an optimization. Note that a global policy change * does not affect fully connected sockets if they have policy. If fully * connected sockets did not have any policy associated with it, global * policy change may affect them. * * IP Flow control notes: * * Non-TCP streams are flow controlled by IP. On the send side, if the packet * cannot be sent down to the driver by IP, because of a canput failure, IP * does a putq on the conn_wq. This will cause ip_wsrv to run on the conn_wq. * ip_wsrv in turn, inserts the conn in a list of conn's that need to be drained * when the flowcontrol condition subsides. Ultimately STREAMS backenables the * ip_wsrv on the IP module, which in turn does a qenable of the conn_wq of the * first conn in the list of conn's to be drained. ip_wsrv on this conn drains * the queued messages, and removes the conn from the drain list, if all * messages were drained. It also qenables the next conn in the drain list to * continue the drain process. * * In reality the drain list is not a single list, but a configurable number * of lists. The ip_wsrv on the IP module, qenables the first conn in each * list. If the ip_wsrv of the next qenabled conn does not run, because the * stream closes, ip_close takes responsibility to qenable the next conn in * the drain list. The directly called ip_wput path always does a putq, if * it cannot putnext. Thus synchronization problems are handled between * ip_wsrv and ip_close. conn_drain_insert and conn_drain_tail are the only * functions that manipulate this drain list. Furthermore conn_drain_insert * is called only from ip_wsrv, and there can be only 1 instance of ip_wsrv * running on a queue at any time. conn_drain_tail can be simultaneously called * from both ip_wsrv and ip_close. * * IPQOS notes: * * IPQoS Policies are applied to packets using IPPF (IP Policy framework) * and IPQoS modules. IPPF includes hooks in IP at different control points * (callout positions) which direct packets to IPQoS modules for policy * processing. Policies, if present, are global. * * The callout positions are located in the following paths: * o local_in (packets destined for this host) * o local_out (packets orginating from this host ) * o fwd_in (packets forwarded by this m/c - inbound) * o fwd_out (packets forwarded by this m/c - outbound) * Hooks at these callout points can be enabled/disabled using the ndd variable * ip_policy_mask (a bit mask with the 4 LSB indicating the callout positions). * By default all the callout positions are enabled. * * Outbound (local_out) * Hooks are placed in ip_wput_ire and ipsec_out_process. * * Inbound (local_in) * Hooks are placed in ip_proto_input, icmp_inbound, ip_fanout_proto and * TCP and UDP fanout routines. * * Forwarding (in and out) * Hooks are placed in ip_rput_forward and ip_mrtun_forward. * * IP Policy Framework processing (IPPF processing) * Policy processing for a packet is initiated by ip_process, which ascertains * that the classifier (ipgpc) is loaded and configured, failing which the * packet resumes normal processing in IP. If the clasifier is present, the * packet is acted upon by one or more IPQoS modules (action instances), per * filters configured in ipgpc and resumes normal IP processing thereafter. * An action instance can drop a packet in course of its processing. * * A boolean variable, ip_policy, is used in all the fanout routines that can * invoke ip_process for a packet. This variable indicates if the packet should * to be sent for policy processing. The variable is set to B_TRUE by default, * i.e. when the routines are invoked in the normal ip procesing path for a * packet. The two exceptions being ip_wput_local and icmp_inbound_error_fanout; * ip_policy is set to B_FALSE for all the routines called in these two * functions because, in the former case, we don't process loopback traffic * currently while in the latter, the packets have already been processed in * icmp_inbound. * * Zones notes: * * The partitioning rules for networking are as follows: * 1) Packets coming from a zone must have a source address belonging to that * zone. * 2) Packets coming from a zone can only be sent on a physical interface on * which the zone has an IP address. * 3) Between two zones on the same machine, packet delivery is only allowed if * there's a matching route for the destination and zone in the forwarding * table. * 4) The TCP and UDP port spaces are per-zone; that is, two processes in * different zones can bind to the same port with the wildcard address * (INADDR_ANY). * * The granularity of interface partitioning is at the logical interface level. * Therefore, every zone has its own IP addresses, and incoming packets can be * attributed to a zone unambiguously. A logical interface is placed into a zone * using the SIOCSLIFZONE ioctl; this sets the ipif_zoneid field in the ipif_t * structure. Rule (1) is implemented by modifying the source address selection * algorithm so that the list of eligible addresses is filtered based on the * sending process zone. * * The Internet Routing Entries (IREs) are either exclusive to a zone or shared * across all zones, depending on their type. Here is the break-up: * * IRE type Shared/exclusive * -------- ---------------- * IRE_BROADCAST Exclusive * IRE_DEFAULT (default routes) Shared (*) * IRE_LOCAL Exclusive (x) * IRE_LOOPBACK Exclusive * IRE_PREFIX (net routes) Shared (*) * IRE_CACHE Exclusive * IRE_IF_NORESOLVER (interface routes) Exclusive * IRE_IF_RESOLVER (interface routes) Exclusive * IRE_HOST (host routes) Shared (*) * * (*) A zone can only use a default or off-subnet route if the gateway is * directly reachable from the zone, that is, if the gateway's address matches * one of the zone's logical interfaces. * * (x) IRE_LOCAL are handled a bit differently, since for all other entries * in ire_ctable and IRE_INTERFACE, ire_src_addr is what can be used as source * when sending packets using the IRE. For IRE_LOCAL ire_src_addr is the IP * address of the zone itself (the destination). Since IRE_LOCAL is used * for communication between zones, ip_wput_ire has special logic to set * the right source address when sending using an IRE_LOCAL. * * Furthermore, when ip_restrict_interzone_loopback is set (the default), * ire_cache_lookup restricts loopback using an IRE_LOCAL * between zone to the case when L2 would have conceptually looped the packet * back, i.e. the loopback which is required since neither Ethernet drivers * nor Ethernet hardware loops them back. This is the case when the normal * routes (ignoring IREs with different zoneids) would send out the packet on * the same ill (or ill group) as the ill with which is IRE_LOCAL is * associated. * * Multiple zones can share a common broadcast address; typically all zones * share the 255.255.255.255 address. Incoming as well as locally originated * broadcast packets must be dispatched to all the zones on the broadcast * network. For directed broadcasts (e.g. 10.16.72.255) this is not trivial * since some zones may not be on the 10.16.72/24 network. To handle this, each * zone has its own set of IRE_BROADCAST entries; then, broadcast packets are * sent to every zone that has an IRE_BROADCAST entry for the destination * address on the input ill, see conn_wantpacket(). * * Applications in different zones can join the same multicast group address. * For IPv4, group memberships are per-logical interface, so they're already * inherently part of a zone. For IPv6, group memberships are per-physical * interface, so we distinguish IPv6 group memberships based on group address, * interface and zoneid. In both cases, received multicast packets are sent to * every zone for which a group membership entry exists. On IPv6 we need to * check that the target zone still has an address on the receiving physical * interface; it could have been removed since the application issued the * IPV6_JOIN_GROUP. */ /* * Squeue Fanout flags: * 0: No fanout. * 1: Fanout across all squeues */ boolean_t ip_squeue_fanout = 0; /* * Maximum dups allowed per packet. */ uint_t ip_max_frag_dups = 10; #define IS_SIMPLE_IPH(ipha) \ ((ipha)->ipha_version_and_hdr_length == IP_SIMPLE_HDR_VERSION) /* RFC1122 Conformance */ #define IP_FORWARD_DEFAULT IP_FORWARD_NEVER #define ILL_MAX_NAMELEN LIFNAMSIZ static int conn_set_held_ipif(conn_t *, ipif_t **, ipif_t *); static mblk_t *ip_wput_attach_llhdr(mblk_t *, ire_t *, ip_proc_t, uint32_t); static void ip_ipsec_out_prepend(mblk_t *, mblk_t *, ill_t *); static void icmp_frag_needed(queue_t *, mblk_t *, int, zoneid_t); static void icmp_inbound(queue_t *, mblk_t *, boolean_t, ill_t *, int, uint32_t, boolean_t, boolean_t, ill_t *, zoneid_t); static ipaddr_t icmp_get_nexthop_addr(ipha_t *, ill_t *, zoneid_t, mblk_t *mp); static boolean_t icmp_inbound_too_big(icmph_t *, ipha_t *, ill_t *, zoneid_t, mblk_t *, int); static void icmp_inbound_error_fanout(queue_t *, ill_t *, mblk_t *, icmph_t *, ipha_t *, int, int, boolean_t, boolean_t, ill_t *, zoneid_t); static void icmp_options_update(ipha_t *); static void icmp_param_problem(queue_t *, mblk_t *, uint8_t, zoneid_t); static void icmp_pkt(queue_t *, mblk_t *, void *, size_t, boolean_t, zoneid_t zoneid); static mblk_t *icmp_pkt_err_ok(mblk_t *); static void icmp_redirect(mblk_t *); static void icmp_send_redirect(queue_t *, mblk_t *, ipaddr_t); static void ip_arp_news(queue_t *, mblk_t *); static boolean_t ip_bind_insert_ire(mblk_t *, ire_t *, iulp_t *); mblk_t *ip_dlpi_alloc(size_t, t_uscalar_t); char *ip_dot_addr(ipaddr_t, char *); mblk_t *ip_carve_mp(mblk_t **, ssize_t); int ip_close(queue_t *, int); static char *ip_dot_saddr(uchar_t *, char *); static void ip_fanout_proto(queue_t *, mblk_t *, ill_t *, ipha_t *, uint_t, boolean_t, boolean_t, ill_t *, zoneid_t); static void ip_fanout_tcp(queue_t *, mblk_t *, ill_t *, ipha_t *, uint_t, boolean_t, boolean_t, zoneid_t); static void ip_fanout_udp(queue_t *, mblk_t *, ill_t *, ipha_t *, uint32_t, boolean_t, uint_t, boolean_t, boolean_t, ill_t *, zoneid_t); static void ip_lrput(queue_t *, mblk_t *); ipaddr_t ip_massage_options(ipha_t *); static void ip_mrtun_forward(ire_t *, ill_t *, mblk_t *); ipaddr_t ip_net_mask(ipaddr_t); void ip_newroute(queue_t *, mblk_t *, ipaddr_t, ill_t *, conn_t *, zoneid_t); static void ip_newroute_ipif(queue_t *, mblk_t *, ipif_t *, ipaddr_t, conn_t *, uint32_t, zoneid_t); char *ip_nv_lookup(nv_t *, int); static boolean_t ip_check_for_ipsec_opt(queue_t *, mblk_t *); static int ip_param_get(queue_t *, mblk_t *, caddr_t, cred_t *); static int ip_param_generic_get(queue_t *, mblk_t *, caddr_t, cred_t *); static boolean_t ip_param_register(ipparam_t *, size_t, ipndp_t *, size_t); static int ip_param_set(queue_t *, mblk_t *, char *, caddr_t, cred_t *); void ip_rput(queue_t *, mblk_t *); static void ip_rput_dlpi_writer(ipsq_t *dummy_sq, queue_t *q, mblk_t *mp, void *dummy_arg); void ip_rput_forward(ire_t *, ipha_t *, mblk_t *, ill_t *); static int ip_rput_forward_options(mblk_t *, ipha_t *, ire_t *); static boolean_t ip_rput_local_options(queue_t *, mblk_t *, ipha_t *, ire_t *); static int ip_rput_options(queue_t *, mblk_t *, ipha_t *, ipaddr_t *); static boolean_t ip_rput_fragment(queue_t *, mblk_t **, ipha_t *, uint32_t *, uint16_t *); int ip_snmp_get(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip6(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_icmp(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_icmp6(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_igmp(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_multi(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip_addr(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip6_addr(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip_group_mem(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip6_group_mem(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip_group_src(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip6_group_src(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_virt_multi(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_multi_rtable(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip_route_media(queue_t *, mblk_t *); static mblk_t *ip_snmp_get_mib2_ip6_route_media(queue_t *, mblk_t *); static void ip_snmp_get2_v4(ire_t *, iproutedata_t *); static void ip_snmp_get2_v6_route(ire_t *, iproutedata_t *); static int ip_snmp_get2_v6_media(nce_t *, iproutedata_t *); int ip_snmp_set(queue_t *, int, int, uchar_t *, int); static boolean_t ip_source_routed(ipha_t *); static boolean_t ip_source_route_included(ipha_t *); static void ip_wput_frag(ire_t *, mblk_t *, ip_pkt_t, uint32_t, uint32_t, zoneid_t); static mblk_t *ip_wput_frag_copyhdr(uchar_t *, int, int); static void ip_wput_local_options(ipha_t *); static int ip_wput_options(queue_t *, mblk_t *, ipha_t *, boolean_t, zoneid_t); static void conn_drain_init(void); static void conn_drain_fini(void); static void conn_drain_tail(conn_t *connp, boolean_t closing); static void conn_walk_drain(void); static void conn_walk_fanout_table(connf_t *, uint_t, pfv_t, void *, zoneid_t); static boolean_t conn_wantpacket(conn_t *, ill_t *, ipha_t *, int, zoneid_t); static void ip_arp_done(ipsq_t *dummy_sq, queue_t *q, mblk_t *mp, void *dummy_arg); static int ip_forward_set(queue_t *, mblk_t *, char *, caddr_t, cred_t *); static int ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t, ipaddr_t, ipaddr_t, uint_t *, mcast_record_t, ipaddr_t, mblk_t *), ire_t *, conn_t *, boolean_t, ipaddr_t, mcast_record_t, ipaddr_t, mblk_t *); static void ip_multirt_bad_mtu(ire_t *, uint32_t); static int ip_cgtp_filter_get(queue_t *, mblk_t *, caddr_t, cred_t *); static int ip_cgtp_filter_set(queue_t *, mblk_t *, char *, caddr_t, cred_t *); extern int ip_squeue_bind_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr); extern int ip_squeue_profile_set(queue_t *, mblk_t *, char *, caddr_t, cred_t *); static int ip_input_proc_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr); static int ip_int_set(queue_t *, mblk_t *, char *, caddr_t, cred_t *); static squeue_func_t ip_squeue_switch(int); static void ip_kstat_init(void); static void ip_kstat_fini(void); static int ip_kstat_update(kstat_t *kp, int rw); static void icmp_kstat_init(void); static void icmp_kstat_fini(void); static int icmp_kstat_update(kstat_t *kp, int rw); static int ip_conn_report(queue_t *, mblk_t *, caddr_t, cred_t *); static mblk_t *ip_tcp_input(mblk_t *, ipha_t *, ill_t *, boolean_t, ire_t *, mblk_t *, uint_t, queue_t *, ill_rx_ring_t *); static void ip_rput_process_forward(queue_t *, mblk_t *, ire_t *, ipha_t *, ill_t *, boolean_t); timeout_id_t ip_ire_expire_id; /* IRE expiration timer. */ static clock_t ip_ire_arp_time_elapsed; /* Time since IRE cache last flushed */ static clock_t ip_ire_rd_time_elapsed; /* ... redirect IREs last flushed */ static clock_t ip_ire_pmtu_time_elapsed; /* Time since path mtu increase */ ipaddr_t ip_g_all_ones = IP_HOST_MASK; clock_t icmp_pkt_err_last = 0; /* Time since last icmp_pkt_err */ uint_t icmp_pkt_err_sent = 0; /* Number of packets sent in burst */ /* How long, in seconds, we allow frags to hang around. */ #define IP_FRAG_TIMEOUT 60 time_t ip_g_frag_timeout = IP_FRAG_TIMEOUT; clock_t ip_g_frag_timo_ms = IP_FRAG_TIMEOUT * 1000; /* * Threshold which determines whether MDT should be used when * generating IP fragments; payload size must be greater than * this threshold for MDT to take place. */ #define IP_WPUT_FRAG_MDT_MIN 32768 int ip_wput_frag_mdt_min = IP_WPUT_FRAG_MDT_MIN; /* Protected by ip_mi_lock */ static void *ip_g_head; /* Instance Data List Head */ kmutex_t ip_mi_lock; /* Lock for list of instances */ /* Only modified during _init and _fini thus no locking is needed. */ caddr_t ip_g_nd; /* Named Dispatch List Head */ static long ip_rput_pullups; int dohwcksum = 1; /* use h/w cksum if supported by the hardware */ vmem_t *ip_minor_arena; /* * MIB-2 stuff for SNMP (both IP and ICMP) */ mib2_ip_t ip_mib; mib2_icmp_t icmp_mib; #ifdef DEBUG uint32_t ipsechw_debug = 0; #endif kstat_t *ip_mibkp; /* kstat exporting ip_mib data */ kstat_t *icmp_mibkp; /* kstat exporting icmp_mib data */ uint_t loopback_packets = 0; /* * Multirouting/CGTP stuff */ cgtp_filter_ops_t *ip_cgtp_filter_ops; /* CGTP hooks */ int ip_cgtp_filter_rev = CGTP_FILTER_REV; /* CGTP hooks version */ boolean_t ip_cgtp_filter; /* Enable/disable CGTP hooks */ /* Interval (in ms) between consecutive 'bad MTU' warnings */ hrtime_t ip_multirt_log_interval = 1000; /* Time since last warning issued. */ static hrtime_t multirt_bad_mtu_last_time = 0; kmutex_t ip_trash_timer_lock; krwlock_t ip_g_nd_lock; /* * XXX following really should only be in a header. Would need more * header and .c clean up first. */ extern optdb_obj_t ip_opt_obj; ulong_t ip_squeue_enter_unbound = 0; /* * Named Dispatch Parameter Table. * All of these are alterable, within the min/max values given, at run time. */ static ipparam_t lcl_param_arr[] = { /* min max value name */ { 0, 1, 0, "ip_respond_to_address_mask_broadcast"}, { 0, 1, 1, "ip_respond_to_echo_broadcast"}, { 0, 1, 1, "ip_respond_to_echo_multicast"}, { 0, 1, 0, "ip_respond_to_timestamp"}, { 0, 1, 0, "ip_respond_to_timestamp_broadcast"}, { 0, 1, 1, "ip_send_redirects"}, { 0, 1, 0, "ip_forward_directed_broadcasts"}, { 0, 10, 0, "ip_debug"}, { 0, 10, 0, "ip_mrtdebug"}, { 5000, 999999999, 60000, "ip_ire_timer_interval" }, { 60000, 999999999, 1200000, "ip_ire_arp_interval" }, { 60000, 999999999, 60000, "ip_ire_redirect_interval" }, { 1, 255, 255, "ip_def_ttl" }, { 0, 1, 0, "ip_forward_src_routed"}, { 0, 256, 32, "ip_wroff_extra" }, { 5000, 999999999, 600000, "ip_ire_pathmtu_interval" }, { 8, 65536, 64, "ip_icmp_return_data_bytes" }, { 0, 1, 1, "ip_path_mtu_discovery" }, { 0, 240, 30, "ip_ignore_delete_time" }, { 0, 1, 0, "ip_ignore_redirect" }, { 0, 1, 1, "ip_output_queue" }, { 1, 254, 1, "ip_broadcast_ttl" }, { 0, 99999, 100, "ip_icmp_err_interval" }, { 1, 99999, 10, "ip_icmp_err_burst" }, { 0, 999999999, 1000000, "ip_reass_queue_bytes" }, { 0, 1, 0, "ip_strict_dst_multihoming" }, { 1, MAX_ADDRS_PER_IF, 256, "ip_addrs_per_if"}, { 0, 1, 0, "ipsec_override_persocket_policy" }, { 0, 1, 1, "icmp_accept_clear_messages" }, { 0, 1, 1, "igmp_accept_clear_messages" }, { 2, 999999999, ND_DELAY_FIRST_PROBE_TIME, "ip_ndp_delay_first_probe_time"}, { 1, 999999999, ND_MAX_UNICAST_SOLICIT, "ip_ndp_max_unicast_solicit"}, { 1, 255, IPV6_MAX_HOPS, "ip6_def_hops" }, { 8, IPV6_MIN_MTU, IPV6_MIN_MTU, "ip6_icmp_return_data_bytes" }, { 0, 1, 0, "ip6_forward_src_routed"}, { 0, 1, 1, "ip6_respond_to_echo_multicast"}, { 0, 1, 1, "ip6_send_redirects"}, { 0, 1, 0, "ip6_ignore_redirect" }, { 0, 1, 0, "ip6_strict_dst_multihoming" }, { 1, 8, 3, "ip_ire_reclaim_fraction" }, { 0, 999999, 1000, "ipsec_policy_log_interval" }, { 0, 1, 1, "pim_accept_clear_messages" }, { 1000, 20000, 2000, "ip_ndp_unsolicit_interval" }, { 1, 20, 3, "ip_ndp_unsolicit_count" }, { 0, 1, 1, "ip6_ignore_home_address_opt" }, { 0, 15, 0, "ip_policy_mask" }, { 1000, 60000, 1000, "ip_multirt_resolution_interval" }, { 0, 255, 1, "ip_multirt_ttl" }, { 0, 1, 1, "ip_multidata_outbound" }, { 0, 3600000, 300000, "ip_ndp_defense_interval" }, { 0, 999999, 60*60*24, "ip_max_temp_idle" }, { 0, 1000, 1, "ip_max_temp_defend" }, { 0, 1000, 3, "ip_max_defend" }, { 0, 999999, 30, "ip_defend_interval" }, { 0, 3600000, 300000, "ip_dup_recovery" }, { 0, 1, 1, "ip_restrict_interzone_loopback" }, { 0, 1, 1, "ip_lso_outbound" }, #ifdef DEBUG { 0, 1, 0, "ip6_drop_inbound_icmpv6" }, #endif }; ipparam_t *ip_param_arr = lcl_param_arr; /* Extended NDP table */ static ipndp_t lcl_ndp_arr[] = { /* getf setf data name */ { ip_param_generic_get, ip_forward_set, (caddr_t)&ip_g_forward, "ip_forwarding" }, { ip_param_generic_get, ip_forward_set, (caddr_t)&ipv6_forward, "ip6_forwarding" }, { ip_ill_report, NULL, NULL, "ip_ill_status" }, { ip_ipif_report, NULL, NULL, "ip_ipif_status" }, { ip_ire_report, NULL, NULL, "ipv4_ire_status" }, { ip_ire_report_mrtun, NULL, NULL, "ipv4_mrtun_ire_status" }, { ip_ire_report_srcif, NULL, NULL, "ipv4_srcif_ire_status" }, { ip_ire_report_v6, NULL, NULL, "ipv6_ire_status" }, { ip_conn_report, NULL, NULL, "ip_conn_status" }, { nd_get_long, nd_set_long, (caddr_t)&ip_rput_pullups, "ip_rput_pullups" }, { ndp_report, NULL, NULL, "ip_ndp_cache_report" }, { ip_srcid_report, NULL, NULL, "ip_srcid_status" }, { ip_param_generic_get, ip_squeue_profile_set, (caddr_t)&ip_squeue_profile, "ip_squeue_profile" }, { ip_param_generic_get, ip_squeue_bind_set, (caddr_t)&ip_squeue_bind, "ip_squeue_bind" }, { ip_param_generic_get, ip_input_proc_set, (caddr_t)&ip_squeue_enter, "ip_squeue_enter" }, { ip_param_generic_get, ip_int_set, (caddr_t)&ip_squeue_fanout, "ip_squeue_fanout" }, { ip_cgtp_filter_get, ip_cgtp_filter_set, (caddr_t)&ip_cgtp_filter, "ip_cgtp_filter" }, { ip_param_generic_get, ip_int_set, (caddr_t)&ip_soft_rings_cnt, "ip_soft_rings_cnt" } }; /* * ip_g_forward controls IP forwarding. It takes two values: * 0: IP_FORWARD_NEVER Don't forward packets ever. * 1: IP_FORWARD_ALWAYS Forward packets for elsewhere. * * RFC1122 says there must be a configuration switch to control forwarding, * but that the default MUST be to not forward packets ever. Implicit * control based on configuration of multiple interfaces MUST NOT be * implemented (Section 3.1). SunOS 4.1 did provide the "automatic" capability * and, in fact, it was the default. That capability is now provided in the * /etc/rc2.d/S69inet script. */ int ip_g_forward = IP_FORWARD_DEFAULT; /* It also has an IPv6 counterpart. */ int ipv6_forward = IP_FORWARD_DEFAULT; /* * Table of IP ioctls encoding the various properties of the ioctl and * indexed based on the last byte of the ioctl command. Occasionally there * is a clash, and there is more than 1 ioctl with the same last byte. * In such a case 1 ioctl is encoded in the ndx table and the remaining * ioctls are encoded in the misc table. An entry in the ndx table is * retrieved by indexing on the last byte of the ioctl command and comparing * the ioctl command with the value in the ndx table. In the event of a * mismatch the misc table is then searched sequentially for the desired * ioctl command. * * Entry: */ ip_ioctl_cmd_t ip_ndx_ioctl_table[] = { /* 000 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 001 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 002 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 003 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 004 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 005 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 006 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 007 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 008 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 009 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 010 */ { SIOCADDRT, sizeof (struct rtentry), IPI_PRIV, MISC_CMD, ip_siocaddrt, NULL }, /* 011 */ { SIOCDELRT, sizeof (struct rtentry), IPI_PRIV, MISC_CMD, ip_siocdelrt, NULL }, /* 012 */ { SIOCSIFADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_addr, ip_sioctl_addr_restart }, /* 013 */ { SIOCGIFADDR, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_addr, NULL }, /* 014 */ { SIOCSIFDSTADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_dstaddr, ip_sioctl_dstaddr_restart }, /* 015 */ { SIOCGIFDSTADDR, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_dstaddr, NULL }, /* 016 */ { SIOCSIFFLAGS, sizeof (struct ifreq), IPI_PRIV | IPI_WR | IPI_REPL, IF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart }, /* 017 */ { SIOCGIFFLAGS, sizeof (struct ifreq), IPI_MODOK | IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_flags, NULL }, /* 018 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 019 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* copyin size cannot be coded for SIOCGIFCONF */ /* 020 */ { O_SIOCGIFCONF, 0, IPI_GET_CMD | IPI_REPL, MISC_CMD, ip_sioctl_get_ifconf, NULL }, /* 021 */ { SIOCSIFMTU, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_mtu, NULL }, /* 022 */ { SIOCGIFMTU, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_mtu, NULL }, /* 023 */ { SIOCGIFBRDADDR, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_brdaddr, NULL }, /* 024 */ { SIOCSIFBRDADDR, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_brdaddr, NULL }, /* 025 */ { SIOCGIFNETMASK, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_netmask, NULL }, /* 026 */ { SIOCSIFNETMASK, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_netmask, ip_sioctl_netmask_restart }, /* 027 */ { SIOCGIFMETRIC, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_metric, NULL }, /* 028 */ { SIOCSIFMETRIC, sizeof (struct ifreq), IPI_PRIV, IF_CMD, ip_sioctl_metric, NULL }, /* 029 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* See 166-168 below for extended SIOC*XARP ioctls */ /* 030 */ { SIOCSARP, sizeof (struct arpreq), IPI_PRIV, MISC_CMD, ip_sioctl_arp, NULL }, /* 031 */ { SIOCGARP, sizeof (struct arpreq), IPI_GET_CMD | IPI_REPL, MISC_CMD, ip_sioctl_arp, NULL }, /* 032 */ { SIOCDARP, sizeof (struct arpreq), IPI_PRIV, MISC_CMD, ip_sioctl_arp, NULL }, /* 033 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 034 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 035 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 036 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 037 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 038 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 039 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 040 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 041 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 042 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 043 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 044 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 045 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 046 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 047 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 048 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 049 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 050 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 051 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 052 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 053 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 054 */ { IF_UNITSEL, sizeof (int), IPI_PRIV | IPI_WR | IPI_MODOK, MISC_CMD, if_unitsel, if_unitsel_restart }, /* 055 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 056 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 057 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 058 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 059 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 060 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 061 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 062 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 063 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 064 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 065 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 066 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 067 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 068 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 069 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 070 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 071 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 072 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 073 */ { SIOCSIFNAME, sizeof (struct ifreq), IPI_PRIV | IPI_WR | IPI_MODOK, IF_CMD, ip_sioctl_sifname, NULL }, /* 074 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 075 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 076 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 077 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 078 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 079 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 080 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 081 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 082 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 083 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 084 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 085 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 086 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 087 */ { SIOCGIFNUM, sizeof (int), IPI_GET_CMD | IPI_REPL, MISC_CMD, ip_sioctl_get_ifnum, NULL }, /* 088 */ { SIOCGIFMUXID, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_muxid, NULL }, /* 089 */ { SIOCSIFMUXID, sizeof (struct ifreq), IPI_PRIV | IPI_WR | IPI_REPL, IF_CMD, ip_sioctl_muxid, NULL }, /* Both if and lif variants share same func */ /* 090 */ { SIOCGIFINDEX, sizeof (struct ifreq), IPI_GET_CMD | IPI_REPL, IF_CMD, ip_sioctl_get_lifindex, NULL }, /* Both if and lif variants share same func */ /* 091 */ { SIOCSIFINDEX, sizeof (struct ifreq), IPI_PRIV | IPI_WR | IPI_REPL, IF_CMD, ip_sioctl_slifindex, NULL }, /* copyin size cannot be coded for SIOCGIFCONF */ /* 092 */ { SIOCGIFCONF, 0, IPI_GET_CMD | IPI_REPL, MISC_CMD, ip_sioctl_get_ifconf, NULL }, /* 093 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 094 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 095 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 096 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 097 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 098 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 099 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 100 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 101 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 102 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 103 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 104 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 105 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 106 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 107 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 108 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 109 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 110 */ { SIOCLIFREMOVEIF, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_removeif, ip_sioctl_removeif_restart }, /* 111 */ { SIOCLIFADDIF, sizeof (struct lifreq), IPI_GET_CMD | IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_addif, NULL }, #define SIOCLIFADDR_NDX 112 /* 112 */ { SIOCSLIFADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_addr, ip_sioctl_addr_restart }, /* 113 */ { SIOCGLIFADDR, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_addr, NULL }, /* 114 */ { SIOCSLIFDSTADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_dstaddr, ip_sioctl_dstaddr_restart }, /* 115 */ { SIOCGLIFDSTADDR, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_dstaddr, NULL }, /* 116 */ { SIOCSLIFFLAGS, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart }, /* 117 */ { SIOCGLIFFLAGS, sizeof (struct lifreq), IPI_GET_CMD | IPI_MODOK | IPI_REPL, LIF_CMD, ip_sioctl_get_flags, NULL }, /* 118 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 119 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 120 */ { O_SIOCGLIFCONF, 0, IPI_GET_CMD, MISC_CMD | IPI_REPL, ip_sioctl_get_lifconf, NULL }, /* 121 */ { SIOCSLIFMTU, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_mtu, NULL }, /* 122 */ { SIOCGLIFMTU, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_mtu, NULL }, /* 123 */ { SIOCGLIFBRDADDR, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_brdaddr, NULL }, /* 124 */ { SIOCSLIFBRDADDR, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_brdaddr, NULL }, /* 125 */ { SIOCGLIFNETMASK, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_netmask, NULL }, /* 126 */ { SIOCSLIFNETMASK, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_netmask, ip_sioctl_netmask_restart }, /* 127 */ { SIOCGLIFMETRIC, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_metric, NULL }, /* 128 */ { SIOCSLIFMETRIC, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_metric, NULL }, /* 129 */ { SIOCSLIFNAME, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_MODOK | IPI_REPL, LIF_CMD, ip_sioctl_slifname, ip_sioctl_slifname_restart }, /* 130 */ { SIOCGLIFNUM, sizeof (struct lifnum), IPI_GET_CMD | IPI_REPL, MISC_CMD, ip_sioctl_get_lifnum, NULL }, /* 131 */ { SIOCGLIFMUXID, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_muxid, NULL }, /* 132 */ { SIOCSLIFMUXID, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_muxid, NULL }, /* 133 */ { SIOCGLIFINDEX, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_lifindex, 0 }, /* 134 */ { SIOCSLIFINDEX, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_slifindex, 0 }, /* 135 */ { SIOCSLIFTOKEN, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_token, NULL }, /* 136 */ { SIOCGLIFTOKEN, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_token, NULL }, /* 137 */ { SIOCSLIFSUBNET, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_subnet, ip_sioctl_subnet_restart }, /* 138 */ { SIOCGLIFSUBNET, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_subnet, NULL }, /* 139 */ { SIOCSLIFLNKINFO, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_lnkinfo, NULL }, /* 140 */ { SIOCGLIFLNKINFO, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_lnkinfo, NULL }, /* 141 */ { SIOCLIFDELND, sizeof (struct lifreq), IPI_PRIV, LIF_CMD, ip_siocdelndp_v6, NULL }, /* 142 */ { SIOCLIFGETND, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_siocqueryndp_v6, NULL }, /* 143 */ { SIOCLIFSETND, sizeof (struct lifreq), IPI_PRIV, LIF_CMD, ip_siocsetndp_v6, NULL }, /* 144 */ { SIOCTMYADDR, sizeof (struct sioc_addrreq), IPI_GET_CMD, MISC_CMD, ip_sioctl_tmyaddr, NULL }, /* 145 */ { SIOCTONLINK, sizeof (struct sioc_addrreq), IPI_GET_CMD, MISC_CMD, ip_sioctl_tonlink, NULL }, /* 146 */ { SIOCTMYSITE, sizeof (struct sioc_addrreq), 0, MISC_CMD, ip_sioctl_tmysite, NULL }, /* 147 */ { SIOCGTUNPARAM, sizeof (struct iftun_req), IPI_REPL, TUN_CMD, ip_sioctl_tunparam, NULL }, /* 148 */ { SIOCSTUNPARAM, sizeof (struct iftun_req), IPI_PRIV | IPI_WR, TUN_CMD, ip_sioctl_tunparam, NULL }, /* IPSECioctls handled in ip_sioctl_copyin_setup itself */ /* 149 */ { SIOCFIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL }, /* 150 */ { SIOCSIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL }, /* 151 */ { SIOCDIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL }, /* 152 */ { SIOCLIPSECONFIG, 0, IPI_PRIV, MISC_CMD, NULL, NULL }, /* 153 */ { SIOCLIFFAILOVER, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_move, ip_sioctl_move }, /* 154 */ { SIOCLIFFAILBACK, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_move, ip_sioctl_move }, /* 155 */ { SIOCSLIFGROUPNAME, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_groupname, ip_sioctl_groupname }, /* 156 */ { SIOCGLIFGROUPNAME, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_groupname, NULL }, /* 157 */ { SIOCGLIFOINDEX, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_oindex, NULL }, /* Leave 158-160 unused; used to be SIOC*IFARP ioctls */ /* 158 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 159 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 160 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 161 */ { SIOCSLIFOINDEX, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_slifoindex, NULL }, /* These are handled in ip_sioctl_copyin_setup itself */ /* 162 */ { SIOCGIP6ADDRPOLICY, 0, IPI_NULL_BCONT, MISC_CMD, NULL, NULL }, /* 163 */ { SIOCSIP6ADDRPOLICY, 0, IPI_PRIV | IPI_NULL_BCONT, MISC_CMD, NULL, NULL }, /* 164 */ { SIOCGDSTINFO, 0, IPI_GET_CMD, MISC_CMD, NULL, NULL }, /* 165 */ { SIOCGLIFCONF, 0, IPI_GET_CMD, MISC_CMD | IPI_REPL, ip_sioctl_get_lifconf, NULL }, /* 166 */ { SIOCSXARP, sizeof (struct xarpreq), IPI_PRIV, MISC_CMD, ip_sioctl_xarp, NULL }, /* 167 */ { SIOCGXARP, sizeof (struct xarpreq), IPI_GET_CMD | IPI_REPL, MISC_CMD, ip_sioctl_xarp, NULL }, /* 168 */ { SIOCDXARP, sizeof (struct xarpreq), IPI_PRIV, MISC_CMD, ip_sioctl_xarp, NULL }, /* SIOCPOPSOCKFS is not handled by IP */ /* 169 */ { IPI_DONTCARE /* SIOCPOPSOCKFS */, 0, 0, 0, NULL, NULL }, /* 170 */ { SIOCGLIFZONE, sizeof (struct lifreq), IPI_GET_CMD | IPI_REPL, LIF_CMD, ip_sioctl_get_lifzone, NULL }, /* 171 */ { SIOCSLIFZONE, sizeof (struct lifreq), IPI_PRIV | IPI_WR | IPI_REPL, LIF_CMD, ip_sioctl_slifzone, ip_sioctl_slifzone_restart }, /* 172-174 are SCTP ioctls and not handled by IP */ /* 172 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 173 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 174 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 175 */ { SIOCGLIFUSESRC, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifusesrc, 0 }, /* 176 */ { SIOCSLIFUSESRC, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_slifusesrc, NULL }, /* 177 */ { SIOCGLIFSRCOF, 0, IPI_GET_CMD, MISC_CMD, ip_sioctl_get_lifsrcof, NULL }, /* 178 */ { SIOCGMSFILTER, sizeof (struct group_filter), IPI_GET_CMD, MISC_CMD, ip_sioctl_msfilter, NULL }, /* 179 */ { SIOCSMSFILTER, sizeof (struct group_filter), IPI_WR, MISC_CMD, ip_sioctl_msfilter, NULL }, /* 180 */ { SIOCGIPMSFILTER, sizeof (struct ip_msfilter), IPI_GET_CMD, MISC_CMD, ip_sioctl_msfilter, NULL }, /* 181 */ { SIOCSIPMSFILTER, sizeof (struct ip_msfilter), IPI_WR, MISC_CMD, ip_sioctl_msfilter, NULL }, /* 182 */ { SIOCSIPMPFAILBACK, sizeof (int), IPI_PRIV, MISC_CMD, ip_sioctl_set_ipmpfailback, NULL } }; int ip_ndx_ioctl_count = sizeof (ip_ndx_ioctl_table) / sizeof (ip_ioctl_cmd_t); ip_ioctl_cmd_t ip_misc_ioctl_table[] = { { OSIOCGTUNPARAM, sizeof (struct old_iftun_req), IPI_GET_CMD | IPI_REPL, TUN_CMD, ip_sioctl_tunparam, NULL }, { OSIOCSTUNPARAM, sizeof (struct old_iftun_req), IPI_PRIV | IPI_WR, TUN_CMD, ip_sioctl_tunparam, NULL }, { I_LINK, 0, IPI_PRIV | IPI_WR | IPI_PASS_DOWN, 0, NULL, NULL }, { I_UNLINK, 0, IPI_PRIV | IPI_WR | IPI_PASS_DOWN, 0, NULL, NULL }, { I_PLINK, 0, IPI_PRIV | IPI_WR | IPI_PASS_DOWN, 0, NULL, NULL }, { I_PUNLINK, 0, IPI_PRIV | IPI_WR | IPI_PASS_DOWN, 0, NULL, NULL }, { ND_GET, 0, IPI_PASS_DOWN, 0, NULL, NULL }, { ND_SET, 0, IPI_PRIV | IPI_WR | IPI_PASS_DOWN, 0, NULL, NULL }, { IP_IOCTL, 0, 0, 0, NULL, NULL }, { SIOCGETVIFCNT, sizeof (struct sioc_vif_req), IPI_REPL | IPI_GET_CMD, MISC_CMD, mrt_ioctl}, { SIOCGETSGCNT, sizeof (struct sioc_sg_req), IPI_REPL | IPI_GET_CMD, MISC_CMD, mrt_ioctl}, { SIOCGETLSGCNT, sizeof (struct sioc_lsg_req), IPI_REPL | IPI_GET_CMD, MISC_CMD, mrt_ioctl} }; int ip_misc_ioctl_count = sizeof (ip_misc_ioctl_table) / sizeof (ip_ioctl_cmd_t); static idl_t *conn_drain_list; /* The array of conn drain lists */ static uint_t conn_drain_list_cnt; /* Total count of conn_drain_list */ static int conn_drain_list_index; /* Next drain_list to be used */ int conn_drain_nthreads; /* Number of drainers reqd. */ /* Settable in /etc/system */ uint_t ip_redirect_cnt; /* Num of redirect routes in ftable */ /* Defined in ip_ire.c */ extern uint32_t ip_ire_max_bucket_cnt, ip6_ire_max_bucket_cnt; extern uint32_t ip_ire_min_bucket_cnt, ip6_ire_min_bucket_cnt; extern uint32_t ip_ire_mem_ratio, ip_ire_cpu_ratio; static nv_t ire_nv_arr[] = { { IRE_BROADCAST, "BROADCAST" }, { IRE_LOCAL, "LOCAL" }, { IRE_LOOPBACK, "LOOPBACK" }, { IRE_CACHE, "CACHE" }, { IRE_DEFAULT, "DEFAULT" }, { IRE_PREFIX, "PREFIX" }, { IRE_IF_NORESOLVER, "IF_NORESOL" }, { IRE_IF_RESOLVER, "IF_RESOLV" }, { IRE_HOST, "HOST" }, { 0 } }; nv_t *ire_nv_tbl = ire_nv_arr; /* Defined in ip_if.c, protect the list of IPsec capable ills */ extern krwlock_t ipsec_capab_ills_lock; /* Defined in ip_netinfo.c */ extern ddi_taskq_t *eventq_queue_nic; /* Packet dropper for IP IPsec processing failures */ ipdropper_t ip_dropper; /* Simple ICMP IP Header Template */ static ipha_t icmp_ipha = { IP_SIMPLE_HDR_VERSION, 0, 0, 0, 0, 0, IPPROTO_ICMP }; struct module_info ip_mod_info = { IP_MOD_ID, IP_MOD_NAME, 1, INFPSZ, 65536, 1024 }; /* * Duplicate static symbols within a module confuses mdb; so we avoid the * problem by making the symbols here distinct from those in udp.c. */ static struct qinit iprinit = { (pfi_t)ip_rput, NULL, ip_open, ip_close, NULL, &ip_mod_info }; static struct qinit ipwinit = { (pfi_t)ip_wput, (pfi_t)ip_wsrv, ip_open, ip_close, NULL, &ip_mod_info }; static struct qinit iplrinit = { (pfi_t)ip_lrput, NULL, ip_open, ip_close, NULL, &ip_mod_info }; static struct qinit iplwinit = { (pfi_t)ip_lwput, NULL, ip_open, ip_close, NULL, &ip_mod_info }; struct streamtab ipinfo = { &iprinit, &ipwinit, &iplrinit, &iplwinit }; #ifdef DEBUG static boolean_t skip_sctp_cksum = B_FALSE; #endif /* * Prepend the zoneid using an ipsec_out_t for later use by functions like * ip_rput_v6(), ip_output(), etc. If the message * block already has a M_CTL at the front of it, then simply set the zoneid * appropriately. */ mblk_t * ip_prepend_zoneid(mblk_t *mp, zoneid_t zoneid) { mblk_t *first_mp; ipsec_out_t *io; ASSERT(zoneid != ALL_ZONES); if (mp->b_datap->db_type == M_CTL) { io = (ipsec_out_t *)mp->b_rptr; ASSERT(io->ipsec_out_type == IPSEC_OUT); io->ipsec_out_zoneid = zoneid; return (mp); } first_mp = ipsec_alloc_ipsec_out(); if (first_mp == NULL) return (NULL); io = (ipsec_out_t *)first_mp->b_rptr; /* This is not a secure packet */ io->ipsec_out_secure = B_FALSE; io->ipsec_out_zoneid = zoneid; first_mp->b_cont = mp; return (first_mp); } /* * Copy an M_CTL-tagged message, preserving reference counts appropriately. */ mblk_t * ip_copymsg(mblk_t *mp) { mblk_t *nmp; ipsec_info_t *in; if (mp->b_datap->db_type != M_CTL) return (copymsg(mp)); in = (ipsec_info_t *)mp->b_rptr; /* * Note that M_CTL is also used for delivering ICMP error messages * upstream to transport layers. */ if (in->ipsec_info_type != IPSEC_OUT && in->ipsec_info_type != IPSEC_IN) return (copymsg(mp)); nmp = copymsg(mp->b_cont); if (in->ipsec_info_type == IPSEC_OUT) return (ipsec_out_tag(mp, nmp)); else return (ipsec_in_tag(mp, nmp)); } /* Generate an ICMP fragmentation needed message. */ static void icmp_frag_needed(queue_t *q, mblk_t *mp, int mtu, zoneid_t zoneid) { icmph_t icmph; mblk_t *first_mp; boolean_t mctl_present; EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (!(mp = icmp_pkt_err_ok(mp))) { if (mctl_present) freeb(first_mp); return; } bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_DEST_UNREACHABLE; icmph.icmph_code = ICMP_FRAGMENTATION_NEEDED; icmph.icmph_du_mtu = htons((uint16_t)mtu); BUMP_MIB(&icmp_mib, icmpOutFragNeeded); BUMP_MIB(&icmp_mib, icmpOutDestUnreachs); icmp_pkt(q, first_mp, &icmph, sizeof (icmph_t), mctl_present, zoneid); } /* * icmp_inbound deals with ICMP messages in the following ways. * * 1) It needs to send a reply back and possibly delivering it * to the "interested" upper clients. * 2) It needs to send it to the upper clients only. * 3) It needs to change some values in IP only. * 4) It needs to change some values in IP and upper layers e.g TCP. * * We need to accomodate icmp messages coming in clear until we get * everything secure from the wire. If icmp_accept_clear_messages * is zero we check with the global policy and act accordingly. If * it is non-zero, we accept the message without any checks. But * *this does not mean* that this will be delivered to the upper * clients. By accepting we might send replies back, change our MTU * value etc. but delivery to the ULP/clients depends on their policy * dispositions. * * We handle the above 4 cases in the context of IPSEC in the * following way : * * 1) Send the reply back in the same way as the request came in. * If it came in encrypted, it goes out encrypted. If it came in * clear, it goes out in clear. Thus, this will prevent chosen * plain text attack. * 2) The client may or may not expect things to come in secure. * If it comes in secure, the policy constraints are checked * before delivering it to the upper layers. If it comes in * clear, ipsec_inbound_accept_clear will decide whether to * accept this in clear or not. In both the cases, if the returned * message (IP header + 8 bytes) that caused the icmp message has * AH/ESP headers, it is sent up to AH/ESP for validation before * sending up. If there are only 8 bytes of returned message, then * upper client will not be notified. * 3) Check with global policy to see whether it matches the constaints. * But this will be done only if icmp_accept_messages_in_clear is * zero. * 4) If we need to change both in IP and ULP, then the decision taken * while affecting the values in IP and while delivering up to TCP * should be the same. * * There are two cases. * * a) If we reject data at the IP layer (ipsec_check_global_policy() * failed), we will not deliver it to the ULP, even though they * are *willing* to accept in *clear*. This is fine as our global * disposition to icmp messages asks us reject the datagram. * * b) If we accept data at the IP layer (ipsec_check_global_policy() * succeeded or icmp_accept_messages_in_clear is 1), and not able * to deliver it to ULP (policy failed), it can lead to * consistency problems. The cases known at this time are * ICMP_DESTINATION_UNREACHABLE messages with following code * values : * * - ICMP_FRAGMENTATION_NEEDED : IP adapts to the new value * and Upper layer rejects. Then the communication will * come to a stop. This is solved by making similar decisions * at both levels. Currently, when we are unable to deliver * to the Upper Layer (due to policy failures) while IP has * adjusted ire_max_frag, the next outbound datagram would * generate a local ICMP_FRAGMENTATION_NEEDED message - which * will be with the right level of protection. Thus the right * value will be communicated even if we are not able to * communicate when we get from the wire initially. But this * assumes there would be at least one outbound datagram after * IP has adjusted its ire_max_frag value. To make things * simpler, we accept in clear after the validation of * AH/ESP headers. * * - Other ICMP ERRORS : We may not be able to deliver it to the * upper layer depending on the level of protection the upper * layer expects and the disposition in ipsec_inbound_accept_clear(). * ipsec_inbound_accept_clear() decides whether a given ICMP error * should be accepted in clear when the Upper layer expects secure. * Thus the communication may get aborted by some bad ICMP * packets. * * IPQoS Notes: * The only instance when a packet is sent for processing is when there * isn't an ICMP client and if we are interested in it. * If there is a client, IPPF processing will take place in the * ip_fanout_proto routine. * * Zones notes: * The packet is only processed in the context of the specified zone: typically * only this zone will reply to an echo request, and only interested clients in * this zone will receive a copy of the packet. This means that the caller must * call icmp_inbound() for each relevant zone. */ static void icmp_inbound(queue_t *q, mblk_t *mp, boolean_t broadcast, ill_t *ill, int sum_valid, uint32_t sum, boolean_t mctl_present, boolean_t ip_policy, ill_t *recv_ill, zoneid_t zoneid) { icmph_t *icmph; ipha_t *ipha; int iph_hdr_length; int hdr_length; boolean_t interested; uint32_t ts; uchar_t *wptr; ipif_t *ipif; mblk_t *first_mp; ipsec_in_t *ii; ire_t *src_ire; boolean_t onlink; timestruc_t now; uint32_t ill_index; ASSERT(ill != NULL); first_mp = mp; if (mctl_present) { mp = first_mp->b_cont; ASSERT(mp != NULL); } ipha = (ipha_t *)mp->b_rptr; if (icmp_accept_clear_messages == 0) { first_mp = ipsec_check_global_policy(first_mp, NULL, ipha, NULL, mctl_present); if (first_mp == NULL) return; } /* * On a labeled system, we have to check whether the zone itself is * permitted to receive raw traffic. */ if (is_system_labeled()) { if (zoneid == ALL_ZONES) zoneid = tsol_packet_to_zoneid(mp); if (!tsol_can_accept_raw(mp, B_FALSE)) { ip1dbg(("icmp_inbound: zone %d can't receive raw", zoneid)); BUMP_MIB(&icmp_mib, icmpInErrors); freemsg(first_mp); return; } } /* * We have accepted the ICMP message. It means that we will * respond to the packet if needed. It may not be delivered * to the upper client depending on the policy constraints * and the disposition in ipsec_inbound_accept_clear. */ ASSERT(ill != NULL); BUMP_MIB(&icmp_mib, icmpInMsgs); iph_hdr_length = IPH_HDR_LENGTH(ipha); if ((mp->b_wptr - mp->b_rptr) < (iph_hdr_length + ICMPH_SIZE)) { /* Last chance to get real. */ if (!pullupmsg(mp, iph_hdr_length + ICMPH_SIZE)) { BUMP_MIB(&icmp_mib, icmpInErrors); freemsg(first_mp); return; } /* Refresh iph following the pullup. */ ipha = (ipha_t *)mp->b_rptr; } /* ICMP header checksum, including checksum field, should be zero. */ if (sum_valid ? (sum != 0 && sum != 0xFFFF) : IP_CSUM(mp, iph_hdr_length, 0)) { BUMP_MIB(&icmp_mib, icmpInCksumErrs); freemsg(first_mp); return; } /* The IP header will always be a multiple of four bytes */ icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ip2dbg(("icmp_inbound: type %d code %d\n", icmph->icmph_type, icmph->icmph_code)); wptr = (uchar_t *)icmph + ICMPH_SIZE; /* We will set "interested" to "true" if we want a copy */ interested = B_FALSE; switch (icmph->icmph_type) { case ICMP_ECHO_REPLY: BUMP_MIB(&icmp_mib, icmpInEchoReps); break; case ICMP_DEST_UNREACHABLE: if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED) BUMP_MIB(&icmp_mib, icmpInFragNeeded); interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&icmp_mib, icmpInDestUnreachs); break; case ICMP_SOURCE_QUENCH: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&icmp_mib, icmpInSrcQuenchs); break; case ICMP_REDIRECT: if (!ip_ignore_redirect) interested = B_TRUE; BUMP_MIB(&icmp_mib, icmpInRedirects); break; case ICMP_ECHO_REQUEST: /* * Whether to respond to echo requests that come in as IP * broadcasts or as IP multicast is subject to debate * (what isn't?). We aim to please, you pick it. * Default is do it. */ if (!broadcast && !CLASSD(ipha->ipha_dst)) { /* unicast: always respond */ interested = B_TRUE; } else if (CLASSD(ipha->ipha_dst)) { /* multicast: respond based on tunable */ interested = ip_g_resp_to_echo_mcast; } else if (broadcast) { /* broadcast: respond based on tunable */ interested = ip_g_resp_to_echo_bcast; } BUMP_MIB(&icmp_mib, icmpInEchos); break; case ICMP_ROUTER_ADVERTISEMENT: case ICMP_ROUTER_SOLICITATION: break; case ICMP_TIME_EXCEEDED: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&icmp_mib, icmpInTimeExcds); break; case ICMP_PARAM_PROBLEM: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&icmp_mib, icmpInParmProbs); break; case ICMP_TIME_STAMP_REQUEST: /* Response to Time Stamp Requests is local policy. */ if (ip_g_resp_to_timestamp && /* So is whether to respond if it was an IP broadcast. */ (!broadcast || ip_g_resp_to_timestamp_bcast)) { int tstamp_len = 3 * sizeof (uint32_t); if (wptr + tstamp_len > mp->b_wptr) { if (!pullupmsg(mp, wptr + tstamp_len - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } /* Refresh ipha following the pullup. */ ipha = (ipha_t *)mp->b_rptr; icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; wptr = (uchar_t *)icmph + ICMPH_SIZE; } interested = B_TRUE; } BUMP_MIB(&icmp_mib, icmpInTimestamps); break; case ICMP_TIME_STAMP_REPLY: BUMP_MIB(&icmp_mib, icmpInTimestampReps); break; case ICMP_INFO_REQUEST: /* Per RFC 1122 3.2.2.7, ignore this. */ case ICMP_INFO_REPLY: break; case ICMP_ADDRESS_MASK_REQUEST: if ((ip_respond_to_address_mask_broadcast || !broadcast) && /* TODO m_pullup of complete header? */ (mp->b_datap->db_lim - wptr) >= IP_ADDR_LEN) interested = B_TRUE; BUMP_MIB(&icmp_mib, icmpInAddrMasks); break; case ICMP_ADDRESS_MASK_REPLY: BUMP_MIB(&icmp_mib, icmpInAddrMaskReps); break; default: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&icmp_mib, icmpInUnknowns); break; } /* See if there is an ICMP client. */ if (ipcl_proto_search(IPPROTO_ICMP) != NULL) { /* If there is an ICMP client and we want one too, copy it. */ mblk_t *first_mp1; if (!interested) { ip_fanout_proto(q, first_mp, ill, ipha, 0, mctl_present, ip_policy, recv_ill, zoneid); return; } first_mp1 = ip_copymsg(first_mp); if (first_mp1 != NULL) { ip_fanout_proto(q, first_mp1, ill, ipha, 0, mctl_present, ip_policy, recv_ill, zoneid); } } else if (!interested) { freemsg(first_mp); return; } else { /* * Initiate policy processing for this packet if ip_policy * is true. */ if (IPP_ENABLED(IPP_LOCAL_IN) && ip_policy) { ill_index = ill->ill_phyint->phyint_ifindex; ip_process(IPP_LOCAL_IN, &mp, ill_index); if (mp == NULL) { if (mctl_present) { freeb(first_mp); } BUMP_MIB(&icmp_mib, icmpInErrors); return; } } } /* We want to do something with it. */ /* Check db_ref to make sure we can modify the packet. */ if (mp->b_datap->db_ref > 1) { mblk_t *first_mp1; first_mp1 = ip_copymsg(first_mp); freemsg(first_mp); if (!first_mp1) { BUMP_MIB(&icmp_mib, icmpOutDrops); return; } first_mp = first_mp1; if (mctl_present) { mp = first_mp->b_cont; ASSERT(mp != NULL); } else { mp = first_mp; } ipha = (ipha_t *)mp->b_rptr; icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; wptr = (uchar_t *)icmph + ICMPH_SIZE; } switch (icmph->icmph_type) { case ICMP_ADDRESS_MASK_REQUEST: ipif = ipif_lookup_remote(ill, ipha->ipha_src, zoneid); if (ipif == NULL) { freemsg(first_mp); return; } /* * outging interface must be IPv4 */ ASSERT(ipif != NULL && !ipif->ipif_isv6); icmph->icmph_type = ICMP_ADDRESS_MASK_REPLY; bcopy(&ipif->ipif_net_mask, wptr, IP_ADDR_LEN); ipif_refrele(ipif); BUMP_MIB(&icmp_mib, icmpOutAddrMaskReps); break; case ICMP_ECHO_REQUEST: icmph->icmph_type = ICMP_ECHO_REPLY; BUMP_MIB(&icmp_mib, icmpOutEchoReps); break; case ICMP_TIME_STAMP_REQUEST: { uint32_t *tsp; icmph->icmph_type = ICMP_TIME_STAMP_REPLY; tsp = (uint32_t *)wptr; tsp++; /* Skip past 'originate time' */ /* Compute # of milliseconds since midnight */ gethrestime(&now); ts = (now.tv_sec % (24 * 60 * 60)) * 1000 + now.tv_nsec / (NANOSEC / MILLISEC); *tsp++ = htonl(ts); /* Lay in 'receive time' */ *tsp++ = htonl(ts); /* Lay in 'send time' */ BUMP_MIB(&icmp_mib, icmpOutTimestampReps); break; } default: ipha = (ipha_t *)&icmph[1]; if ((uchar_t *)&ipha[1] > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)&ipha[1] - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } if ((IPH_HDR_VERSION(ipha) != IPV4_VERSION)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } hdr_length = IPH_HDR_LENGTH(ipha); if (hdr_length < sizeof (ipha_t)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } if ((uchar_t *)ipha + hdr_length > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + hdr_length - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } switch (icmph->icmph_type) { case ICMP_REDIRECT: /* * As there is no upper client to deliver, we don't * need the first_mp any more. */ if (mctl_present) { freeb(first_mp); } icmp_redirect(mp); return; case ICMP_DEST_UNREACHABLE: if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED) { if (!icmp_inbound_too_big(icmph, ipha, ill, zoneid, mp, iph_hdr_length)) { freemsg(first_mp); return; } /* * icmp_inbound_too_big() may alter mp. * Resynch ipha and icmph accordingly. */ icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } /* FALLTHRU */ default : /* * IPQoS notes: Since we have already done IPQoS * processing we don't want to do it again in * the fanout routines called by * icmp_inbound_error_fanout, hence the last * argument, ip_policy, is B_FALSE. */ icmp_inbound_error_fanout(q, ill, first_mp, icmph, ipha, iph_hdr_length, hdr_length, mctl_present, B_FALSE, recv_ill, zoneid); } return; } /* Send out an ICMP packet */ icmph->icmph_checksum = 0; icmph->icmph_checksum = IP_CSUM(mp, iph_hdr_length, 0); if (icmph->icmph_checksum == 0) icmph->icmph_checksum = 0xFFFF; if (broadcast || CLASSD(ipha->ipha_dst)) { ipif_t *ipif_chosen; /* * Make it look like it was directed to us, so we don't look * like a fool with a broadcast or multicast source address. */ ipif = ipif_lookup_remote(ill, ipha->ipha_src, zoneid); /* * Make sure that we haven't grabbed an interface that's DOWN. */ if (ipif != NULL) { ipif_chosen = ipif_select_source(ipif->ipif_ill, ipha->ipha_src, zoneid); if (ipif_chosen != NULL) { ipif_refrele(ipif); ipif = ipif_chosen; } } if (ipif == NULL) { ip0dbg(("icmp_inbound: " "No source for broadcast/multicast:\n" "\tsrc 0x%x dst 0x%x ill %p " "ipif_lcl_addr 0x%x\n", ntohl(ipha->ipha_src), ntohl(ipha->ipha_dst), (void *)ill, ill->ill_ipif->ipif_lcl_addr)); freemsg(first_mp); return; } ASSERT(ipif != NULL && !ipif->ipif_isv6); ipha->ipha_dst = ipif->ipif_src_addr; ipif_refrele(ipif); } /* Reset time to live. */ ipha->ipha_ttl = ip_def_ttl; { /* Swap source and destination addresses */ ipaddr_t tmp; tmp = ipha->ipha_src; ipha->ipha_src = ipha->ipha_dst; ipha->ipha_dst = tmp; } ipha->ipha_ident = 0; if (!IS_SIMPLE_IPH(ipha)) icmp_options_update(ipha); /* * ICMP echo replies should go out on the same interface * the request came on as probes used by in.mpathd for detecting * NIC failures are ECHO packets. We turn-off load spreading * by setting ipsec_in_attach_if to B_TRUE, which is copied * to ipsec_out_attach_if by ipsec_in_to_out called later in this * function. This is in turn handled by ip_wput and ip_newroute * to make sure that the packet goes out on the interface it came * in on. If we don't turnoff load spreading, the packets might get * dropped if there are no non-FAILED/INACTIVE interfaces for it * to go out and in.mpathd would wrongly detect a failure or * mis-detect a NIC failure for link failure. As load spreading * can happen only if ill_group is not NULL, we do only for * that case and this does not affect the normal case. * * We turn off load spreading only on echo packets that came from * on-link hosts. If the interface route has been deleted, this will * not be enforced as we can't do much. For off-link hosts, as the * default routes in IPv4 does not typically have an ire_ipif * pointer, we can't force MATCH_IRE_ILL in ip_wput/ip_newroute. * Moreover, expecting a default route through this interface may * not be correct. We use ipha_dst because of the swap above. */ onlink = B_FALSE; if (icmph->icmph_type == ICMP_ECHO_REPLY && ill->ill_group != NULL) { /* * First, we need to make sure that it is not one of our * local addresses. If we set onlink when it is one of * our local addresses, we will end up creating IRE_CACHES * for one of our local addresses. Then, we will never * accept packets for them afterwards. */ src_ire = ire_ctable_lookup(ipha->ipha_dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (src_ire == NULL) { ipif = ipif_get_next_ipif(NULL, ill); if (ipif == NULL) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); return; } src_ire = ire_ftable_lookup(ipha->ipha_dst, 0, 0, IRE_INTERFACE, ipif, NULL, ALL_ZONES, 0, NULL, MATCH_IRE_ILL | MATCH_IRE_TYPE); ipif_refrele(ipif); if (src_ire != NULL) { onlink = B_TRUE; ire_refrele(src_ire); } } else { ire_refrele(src_ire); } } if (!mctl_present) { /* * This packet should go out the same way as it * came in i.e in clear. To make sure that global * policy will not be applied to this in ip_wput_ire, * we attach a IPSEC_IN mp and clear ipsec_in_secure. */ ASSERT(first_mp == mp); if ((first_mp = ipsec_in_alloc(B_TRUE)) == NULL) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); return; } ii = (ipsec_in_t *)first_mp->b_rptr; /* This is not a secure packet */ ii->ipsec_in_secure = B_FALSE; if (onlink) { ii->ipsec_in_attach_if = B_TRUE; ii->ipsec_in_ill_index = ill->ill_phyint->phyint_ifindex; ii->ipsec_in_rill_index = recv_ill->ill_phyint->phyint_ifindex; } first_mp->b_cont = mp; } else if (onlink) { ii = (ipsec_in_t *)first_mp->b_rptr; ii->ipsec_in_attach_if = B_TRUE; ii->ipsec_in_ill_index = ill->ill_phyint->phyint_ifindex; ii->ipsec_in_rill_index = recv_ill->ill_phyint->phyint_ifindex; } else { ii = (ipsec_in_t *)first_mp->b_rptr; } ii->ipsec_in_zoneid = zoneid; ASSERT(zoneid != ALL_ZONES); if (!ipsec_in_to_out(first_mp, ipha, NULL)) { BUMP_MIB(&ip_mib, ipInDiscards); return; } BUMP_MIB(&icmp_mib, icmpOutMsgs); put(WR(q), first_mp); } static ipaddr_t icmp_get_nexthop_addr(ipha_t *ipha, ill_t *ill, zoneid_t zoneid, mblk_t *mp) { conn_t *connp; connf_t *connfp; ipaddr_t nexthop_addr = INADDR_ANY; int hdr_length = IPH_HDR_LENGTH(ipha); uint16_t *up; uint32_t ports; up = (uint16_t *)((uchar_t *)ipha + hdr_length); switch (ipha->ipha_protocol) { case IPPROTO_TCP: { tcph_t *tcph; /* do a reverse lookup */ tcph = (tcph_t *)((uchar_t *)ipha + hdr_length); connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcph, TCPS_LISTEN); break; } case IPPROTO_UDP: { uint32_t dstport, srcport; ((uint16_t *)&ports)[0] = up[1]; ((uint16_t *)&ports)[1] = up[0]; /* Extract ports in net byte order */ dstport = htons(ntohl(ports) & 0xFFFF); srcport = htons(ntohl(ports) >> 16); connfp = &ipcl_udp_fanout[IPCL_UDP_HASH(dstport)]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; /* do a reverse lookup */ while ((connp != NULL) && (!IPCL_UDP_MATCH(connp, dstport, ipha->ipha_src, srcport, ipha->ipha_dst) || !IPCL_ZONE_MATCH(connp, zoneid))) { connp = connp->conn_next; } if (connp != NULL) CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); break; } case IPPROTO_SCTP: { in6_addr_t map_src, map_dst; IN6_IPADDR_TO_V4MAPPED(ipha->ipha_dst, &map_src); IN6_IPADDR_TO_V4MAPPED(ipha->ipha_src, &map_dst); ((uint16_t *)&ports)[0] = up[1]; ((uint16_t *)&ports)[1] = up[0]; if ((connp = sctp_find_conn(&map_src, &map_dst, ports, 0, zoneid)) == NULL) { connp = ipcl_classify_raw(mp, IPPROTO_SCTP, zoneid, ports, ipha); } else { CONN_INC_REF(connp); SCTP_REFRELE(CONN2SCTP(connp)); } break; } default: { ipha_t ripha; ripha.ipha_src = ipha->ipha_dst; ripha.ipha_dst = ipha->ipha_src; ripha.ipha_protocol = ipha->ipha_protocol; connfp = &ipcl_proto_fanout[ipha->ipha_protocol]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; for (connp = connfp->connf_head; connp != NULL; connp = connp->conn_next) { if (IPCL_PROTO_MATCH(connp, ipha->ipha_protocol, &ripha, ill, 0, zoneid)) { CONN_INC_REF(connp); break; } } mutex_exit(&connfp->connf_lock); } } if (connp != NULL) { if (connp->conn_nexthop_set) nexthop_addr = connp->conn_nexthop_v4; CONN_DEC_REF(connp); } return (nexthop_addr); } /* Table from RFC 1191 */ static int icmp_frag_size_table[] = { 32000, 17914, 8166, 4352, 2002, 1496, 1006, 508, 296, 68 }; /* * Process received ICMP Packet too big. * After updating any IRE it does the fanout to any matching transport streams. * Assumes the message has been pulled up till the IP header that caused * the error. * * Returns B_FALSE on failure and B_TRUE on success. */ static boolean_t icmp_inbound_too_big(icmph_t *icmph, ipha_t *ipha, ill_t *ill, zoneid_t zoneid, mblk_t *mp, int iph_hdr_length) { ire_t *ire, *first_ire; int mtu; int hdr_length; ipaddr_t nexthop_addr; ASSERT(icmph->icmph_type == ICMP_DEST_UNREACHABLE && icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED); hdr_length = IPH_HDR_LENGTH(ipha); /* Drop if the original packet contained a source route */ if (ip_source_route_included(ipha)) { return (B_FALSE); } /* * Verify we have atleast ICMP_MIN_TP_HDR_LENGTH bytes of transport * header. */ if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); ip1dbg(("icmp_inbound_too_big: insufficient hdr\n")); return (B_FALSE); } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } nexthop_addr = icmp_get_nexthop_addr(ipha, ill, zoneid, mp); if (nexthop_addr != INADDR_ANY) { /* nexthop set */ first_ire = ire_ctable_lookup(ipha->ipha_dst, nexthop_addr, 0, NULL, ALL_ZONES, MBLK_GETLABEL(mp), MATCH_IRE_MARK_PRIVATE_ADDR | MATCH_IRE_GW); } else { /* nexthop not set */ first_ire = ire_ctable_lookup(ipha->ipha_dst, 0, IRE_CACHE, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); } if (!first_ire) { ip1dbg(("icmp_inbound_too_big: no route for 0x%x\n", ntohl(ipha->ipha_dst))); return (B_FALSE); } /* Check for MTU discovery advice as described in RFC 1191 */ mtu = ntohs(icmph->icmph_du_mtu); rw_enter(&first_ire->ire_bucket->irb_lock, RW_READER); for (ire = first_ire; ire != NULL && ire->ire_addr == ipha->ipha_dst; ire = ire->ire_next) { /* * Look for the connection to which this ICMP message is * directed. If it has the IP_NEXTHOP option set, then the * search is limited to IREs with the MATCH_IRE_PRIVATE * option. Else the search is limited to regular IREs. */ if (((ire->ire_marks & IRE_MARK_PRIVATE_ADDR) && (nexthop_addr != ire->ire_gateway_addr)) || (!(ire->ire_marks & IRE_MARK_PRIVATE_ADDR) && (nexthop_addr != INADDR_ANY))) continue; mutex_enter(&ire->ire_lock); if (icmph->icmph_du_zero == 0 && mtu > 68) { /* Reduce the IRE max frag value as advised. */ ip1dbg(("Received mtu from router: %d (was %d)\n", mtu, ire->ire_max_frag)); ire->ire_max_frag = MIN(ire->ire_max_frag, mtu); } else { uint32_t length; int i; /* * Use the table from RFC 1191 to figure out * the next "plateau" based on the length in * the original IP packet. */ length = ntohs(ipha->ipha_length); if (ire->ire_max_frag <= length && ire->ire_max_frag >= length - hdr_length) { /* * Handle broken BSD 4.2 systems that * return the wrong iph_length in ICMP * errors. */ ip1dbg(("Wrong mtu: sent %d, ire %d\n", length, ire->ire_max_frag)); length -= hdr_length; } for (i = 0; i < A_CNT(icmp_frag_size_table); i++) { if (length > icmp_frag_size_table[i]) break; } if (i == A_CNT(icmp_frag_size_table)) { /* Smaller than 68! */ ip1dbg(("Too big for packet size %d\n", length)); ire->ire_max_frag = MIN(ire->ire_max_frag, 576); ire->ire_frag_flag = 0; } else { mtu = icmp_frag_size_table[i]; ip1dbg(("Calculated mtu %d, packet size %d, " "before %d", mtu, length, ire->ire_max_frag)); ire->ire_max_frag = MIN(ire->ire_max_frag, mtu); ip1dbg((", after %d\n", ire->ire_max_frag)); } /* Record the new max frag size for the ULP. */ icmph->icmph_du_zero = 0; icmph->icmph_du_mtu = htons((uint16_t)ire->ire_max_frag); } mutex_exit(&ire->ire_lock); } rw_exit(&first_ire->ire_bucket->irb_lock); ire_refrele(first_ire); return (B_TRUE); } /* * If the packet in error is Self-Encapsulated, icmp_inbound_error_fanout * calls this function. */ static mblk_t * icmp_inbound_self_encap_error(mblk_t *mp, int iph_hdr_length, int hdr_length) { ipha_t *ipha; icmph_t *icmph; ipha_t *in_ipha; int length; ASSERT(mp->b_datap->db_type == M_DATA); /* * For Self-encapsulated packets, we added an extra IP header * without the options. Inner IP header is the one from which * the outer IP header was formed. Thus, we need to remove the * outer IP header. To do this, we pullup the whole message * and overlay whatever follows the outer IP header over the * outer IP header. */ if (!pullupmsg(mp, -1)) { BUMP_MIB(&ip_mib, ipInDiscards); return (NULL); } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; in_ipha = (ipha_t *)((uchar_t *)ipha + hdr_length); /* * The length that we want to overlay is following the inner * IP header. Subtracting the IP header + icmp header + outer * IP header's length should give us the length that we want to * overlay. */ length = msgdsize(mp) - iph_hdr_length - sizeof (icmph_t) - hdr_length; /* * Overlay whatever follows the inner header over the * outer header. */ bcopy((uchar_t *)in_ipha, (uchar_t *)ipha, length); /* Set the wptr to account for the outer header */ mp->b_wptr -= hdr_length; return (mp); } /* * Try to pass the ICMP message upstream in case the ULP cares. * * If the packet that caused the ICMP error is secure, we send * it to AH/ESP to make sure that the attached packet has a * valid association. ipha in the code below points to the * IP header of the packet that caused the error. * * We handle ICMP_FRAGMENTATION_NEEDED(IFN) message differently * in the context of IPSEC. Normally we tell the upper layer * whenever we send the ire (including ip_bind), the IPSEC header * length in ire_ipsec_overhead. TCP can deduce the MSS as it * has both the MTU (ire_max_frag) and the ire_ipsec_overhead. * Similarly, we pass the new MTU icmph_du_mtu and TCP does the * same thing. As TCP has the IPSEC options size that needs to be * adjusted, we just pass the MTU unchanged. * * IFN could have been generated locally or by some router. * * LOCAL : *ip_wput_ire -> icmp_frag_needed could have generated this. * This happens because IP adjusted its value of MTU on an * earlier IFN message and could not tell the upper layer, * the new adjusted value of MTU e.g. Packet was encrypted * or there was not enough information to fanout to upper * layers. Thus on the next outbound datagram, ip_wput_ire * generates the IFN, where IPSEC processing has *not* been * done. * * *ip_wput_ire_fragmentit -> ip_wput_frag -> icmp_frag_needed * could have generated this. This happens because ire_max_frag * value in IP was set to a new value, while the IPSEC processing * was being done and after we made the fragmentation check in * ip_wput_ire. Thus on return from IPSEC processing, * ip_wput_ipsec_out finds that the new length is > ire_max_frag * and generates the IFN. As IPSEC processing is over, we fanout * to AH/ESP to remove the header. * * In both these cases, ipsec_in_loopback will be set indicating * that IFN was generated locally. * * ROUTER : IFN could be secure or non-secure. * * * SECURE : We use the IPSEC_IN to fanout to AH/ESP if the * packet in error has AH/ESP headers to validate the AH/ESP * headers. AH/ESP will verify whether there is a valid SA or * not and send it back. We will fanout again if we have more * data in the packet. * * If the packet in error does not have AH/ESP, we handle it * like any other case. * * * NON_SECURE : If the packet in error has AH/ESP headers, * we attach a dummy ipsec_in and send it up to AH/ESP * for validation. AH/ESP will verify whether there is a * valid SA or not and send it back. We will fanout again if * we have more data in the packet. * * If the packet in error does not have AH/ESP, we handle it * like any other case. */ static void icmp_inbound_error_fanout(queue_t *q, ill_t *ill, mblk_t *mp, icmph_t *icmph, ipha_t *ipha, int iph_hdr_length, int hdr_length, boolean_t mctl_present, boolean_t ip_policy, ill_t *recv_ill, zoneid_t zoneid) { uint16_t *up; /* Pointer to ports in ULP header */ uint32_t ports; /* reversed ports for fanout */ ipha_t ripha; /* With reversed addresses */ mblk_t *first_mp; ipsec_in_t *ii; tcph_t *tcph; conn_t *connp; first_mp = mp; if (mctl_present) { mp = first_mp->b_cont; ASSERT(mp != NULL); ii = (ipsec_in_t *)first_mp->b_rptr; ASSERT(ii->ipsec_in_type == IPSEC_IN); } else { ii = NULL; } switch (ipha->ipha_protocol) { case IPPROTO_UDP: /* * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of * transport header. */ if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } up = (uint16_t *)((uchar_t *)ipha + hdr_length); /* * Attempt to find a client stream based on port. * Note that we do a reverse lookup since the header is * in the form we sent it out. * The ripha header is only used for the IP_UDP_MATCH and we * only set the src and dst addresses and protocol. */ ripha.ipha_src = ipha->ipha_dst; ripha.ipha_dst = ipha->ipha_src; ripha.ipha_protocol = ipha->ipha_protocol; ((uint16_t *)&ports)[0] = up[1]; ((uint16_t *)&ports)[1] = up[0]; ip2dbg(("icmp_inbound_error: UDP %x:%d to %x:%d: %d/%d\n", ntohl(ipha->ipha_src), ntohs(up[0]), ntohl(ipha->ipha_dst), ntohs(up[1]), icmph->icmph_type, icmph->icmph_code)); /* Have to change db_type after any pullupmsg */ DB_TYPE(mp) = M_CTL; ip_fanout_udp(q, first_mp, ill, &ripha, ports, B_FALSE, 0, mctl_present, ip_policy, recv_ill, zoneid); return; case IPPROTO_TCP: /* * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of * transport header. */ if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } /* * Find a TCP client stream for this packet. * Note that we do a reverse lookup since the header is * in the form we sent it out. */ tcph = (tcph_t *)((uchar_t *)ipha + hdr_length); connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcph, TCPS_LISTEN); if (connp == NULL) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } /* Have to change db_type after any pullupmsg */ DB_TYPE(mp) = M_CTL; squeue_fill(connp->conn_sqp, first_mp, tcp_input, connp, SQTAG_TCP_INPUT_ICMP_ERR); return; case IPPROTO_SCTP: /* * Verify we have at least ICMP_MIN_TP_HDR_LEN bytes of * transport header. */ if ((uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + hdr_length + ICMP_MIN_TP_HDR_LEN - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } up = (uint16_t *)((uchar_t *)ipha + hdr_length); /* * Find a SCTP client stream for this packet. * Note that we do a reverse lookup since the header is * in the form we sent it out. * The ripha header is only used for the matching and we * only set the src and dst addresses, protocol, and version. */ ripha.ipha_src = ipha->ipha_dst; ripha.ipha_dst = ipha->ipha_src; ripha.ipha_protocol = ipha->ipha_protocol; ripha.ipha_version_and_hdr_length = ipha->ipha_version_and_hdr_length; ((uint16_t *)&ports)[0] = up[1]; ((uint16_t *)&ports)[1] = up[0]; /* Have to change db_type after any pullupmsg */ DB_TYPE(mp) = M_CTL; ip_fanout_sctp(first_mp, recv_ill, &ripha, ports, 0, mctl_present, ip_policy, 0, zoneid); return; case IPPROTO_ESP: case IPPROTO_AH: { int ipsec_rc; /* * We need a IPSEC_IN in the front to fanout to AH/ESP. * We will re-use the IPSEC_IN if it is already present as * AH/ESP will not affect any fields in the IPSEC_IN for * ICMP errors. If there is no IPSEC_IN, allocate a new * one and attach it in the front. */ if (ii != NULL) { /* * ip_fanout_proto_again converts the ICMP errors * that come back from AH/ESP to M_DATA so that * if it is non-AH/ESP and we do a pullupmsg in * this function, it would work. Convert it back * to M_CTL before we send up as this is a ICMP * error. This could have been generated locally or * by some router. Validate the inner IPSEC * headers. * * NOTE : ill_index is used by ip_fanout_proto_again * to locate the ill. */ ASSERT(ill != NULL); ii->ipsec_in_ill_index = ill->ill_phyint->phyint_ifindex; ii->ipsec_in_rill_index = recv_ill->ill_phyint->phyint_ifindex; DB_TYPE(first_mp->b_cont) = M_CTL; } else { /* * IPSEC_IN is not present. We attach a ipsec_in * message and send up to IPSEC for validating * and removing the IPSEC headers. Clear * ipsec_in_secure so that when we return * from IPSEC, we don't mistakenly think that this * is a secure packet came from the network. * * NOTE : ill_index is used by ip_fanout_proto_again * to locate the ill. */ ASSERT(first_mp == mp); first_mp = ipsec_in_alloc(B_TRUE); if (first_mp == NULL) { freemsg(mp); BUMP_MIB(&ip_mib, ipInDiscards); return; } ii = (ipsec_in_t *)first_mp->b_rptr; /* This is not a secure packet */ ii->ipsec_in_secure = B_FALSE; first_mp->b_cont = mp; DB_TYPE(mp) = M_CTL; ASSERT(ill != NULL); ii->ipsec_in_ill_index = ill->ill_phyint->phyint_ifindex; ii->ipsec_in_rill_index = recv_ill->ill_phyint->phyint_ifindex; } ip2dbg(("icmp_inbound_error: ipsec\n")); if (!ipsec_loaded()) { ip_proto_not_sup(q, first_mp, 0, zoneid); return; } if (ipha->ipha_protocol == IPPROTO_ESP) ipsec_rc = ipsecesp_icmp_error(first_mp); else ipsec_rc = ipsecah_icmp_error(first_mp); if (ipsec_rc == IPSEC_STATUS_FAILED) return; ip_fanout_proto_again(first_mp, ill, recv_ill, NULL); return; } default: /* * The ripha header is only used for the lookup and we * only set the src and dst addresses and protocol. */ ripha.ipha_src = ipha->ipha_dst; ripha.ipha_dst = ipha->ipha_src; ripha.ipha_protocol = ipha->ipha_protocol; ip2dbg(("icmp_inbound_error: proto %d %x to %x: %d/%d\n", ripha.ipha_protocol, ntohl(ipha->ipha_src), ntohl(ipha->ipha_dst), icmph->icmph_type, icmph->icmph_code)); if (ipha->ipha_protocol == IPPROTO_ENCAP) { ipha_t *in_ipha; if ((uchar_t *)ipha + hdr_length + sizeof (ipha_t) > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + hdr_length + sizeof (ipha_t) - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; } /* * Caller has verified that length has to be * at least the size of IP header. */ ASSERT(hdr_length >= sizeof (ipha_t)); /* * Check the sanity of the inner IP header like * we did for the outer header. */ in_ipha = (ipha_t *)((uchar_t *)ipha + hdr_length); if ((IPH_HDR_VERSION(in_ipha) != IPV4_VERSION)) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } if (IPH_HDR_LENGTH(in_ipha) < sizeof (ipha_t)) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } /* Check for Self-encapsulated tunnels */ if (in_ipha->ipha_src == ipha->ipha_src && in_ipha->ipha_dst == ipha->ipha_dst) { mp = icmp_inbound_self_encap_error(mp, iph_hdr_length, hdr_length); if (mp == NULL) goto drop_pkt; icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; hdr_length = IPH_HDR_LENGTH(ipha); /* * The packet in error is self-encapsualted. * And we are finding it further encapsulated * which we could not have possibly generated. */ if (ipha->ipha_protocol == IPPROTO_ENCAP) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } icmp_inbound_error_fanout(q, ill, first_mp, icmph, ipha, iph_hdr_length, hdr_length, mctl_present, ip_policy, recv_ill, zoneid); return; } } if ((ipha->ipha_protocol == IPPROTO_ENCAP || ipha->ipha_protocol == IPPROTO_IPV6) && icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED && ii != NULL && ii->ipsec_in_loopback && ii->ipsec_in_secure) { /* * For IP tunnels that get a looped-back * ICMP_FRAGMENTATION_NEEDED message, adjust the * reported new MTU to take into account the IPsec * headers protecting this configured tunnel. * * This allows the tunnel module (tun.c) to blindly * accept the MTU reported in an ICMP "too big" * message. * * Non-looped back ICMP messages will just be * handled by the security protocols (if needed), * and the first subsequent packet will hit this * path. */ icmph->icmph_du_mtu = htons(ntohs(icmph->icmph_du_mtu) - ipsec_in_extra_length(first_mp)); } /* Have to change db_type after any pullupmsg */ DB_TYPE(mp) = M_CTL; ip_fanout_proto(q, first_mp, ill, &ripha, 0, mctl_present, ip_policy, recv_ill, zoneid); return; } /* NOTREACHED */ drop_pkt:; ip1dbg(("icmp_inbound_error_fanout: drop pkt\n")); freemsg(first_mp); } /* * Common IP options parser. * * Setup routine: fill in *optp with options-parsing state, then * tail-call ipoptp_next to return the first option. */ uint8_t ipoptp_first(ipoptp_t *optp, ipha_t *ipha) { uint32_t totallen; /* total length of all options */ totallen = ipha->ipha_version_and_hdr_length - (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS); totallen <<= 2; optp->ipoptp_next = (uint8_t *)(&ipha[1]); optp->ipoptp_end = optp->ipoptp_next + totallen; optp->ipoptp_flags = 0; return (ipoptp_next(optp)); } /* * Common IP options parser: extract next option. */ uint8_t ipoptp_next(ipoptp_t *optp) { uint8_t *end = optp->ipoptp_end; uint8_t *cur = optp->ipoptp_next; uint8_t opt, len, pointer; /* * If cur > end already, then the ipoptp_end or ipoptp_next pointer * has been corrupted. */ ASSERT(cur <= end); if (cur == end) return (IPOPT_EOL); opt = cur[IPOPT_OPTVAL]; /* * Skip any NOP options. */ while (opt == IPOPT_NOP) { cur++; if (cur == end) return (IPOPT_EOL); opt = cur[IPOPT_OPTVAL]; } if (opt == IPOPT_EOL) return (IPOPT_EOL); /* * Option requiring a length. */ if ((cur + 1) >= end) { optp->ipoptp_flags |= IPOPTP_ERROR; return (IPOPT_EOL); } len = cur[IPOPT_OLEN]; if (len < 2) { optp->ipoptp_flags |= IPOPTP_ERROR; return (IPOPT_EOL); } optp->ipoptp_cur = cur; optp->ipoptp_len = len; optp->ipoptp_next = cur + len; if (cur + len > end) { optp->ipoptp_flags |= IPOPTP_ERROR; return (IPOPT_EOL); } /* * For the options which require a pointer field, make sure * its there, and make sure it points to either something * inside this option, or the end of the option. */ switch (opt) { case IPOPT_RR: case IPOPT_TS: case IPOPT_LSRR: case IPOPT_SSRR: if (len <= IPOPT_OFFSET) { optp->ipoptp_flags |= IPOPTP_ERROR; return (opt); } pointer = cur[IPOPT_OFFSET]; if (pointer - 1 > len) { optp->ipoptp_flags |= IPOPTP_ERROR; return (opt); } break; } /* * Sanity check the pointer field based on the type of the * option. */ switch (opt) { case IPOPT_RR: case IPOPT_SSRR: case IPOPT_LSRR: if (pointer < IPOPT_MINOFF_SR) optp->ipoptp_flags |= IPOPTP_ERROR; break; case IPOPT_TS: if (pointer < IPOPT_MINOFF_IT) optp->ipoptp_flags |= IPOPTP_ERROR; /* * Note that the Internet Timestamp option also * contains two four bit fields (the Overflow field, * and the Flag field), which follow the pointer * field. We don't need to check that these fields * fall within the length of the option because this * was implicitely done above. We've checked that the * pointer value is at least IPOPT_MINOFF_IT, and that * it falls within the option. Since IPOPT_MINOFF_IT > * IPOPT_POS_OV_FLG, we don't need the explicit check. */ ASSERT(len > IPOPT_POS_OV_FLG); break; } return (opt); } /* * Use the outgoing IP header to create an IP_OPTIONS option the way * it was passed down from the application. */ int ip_opt_get_user(const ipha_t *ipha, uchar_t *buf) { ipoptp_t opts; const uchar_t *opt; uint8_t optval; uint8_t optlen; uint32_t len = 0; uchar_t *buf1 = buf; buf += IP_ADDR_LEN; /* Leave room for final destination */ len += IP_ADDR_LEN; bzero(buf1, IP_ADDR_LEN); /* * OK to cast away const here, as we don't store through the returned * opts.ipoptp_cur pointer. */ for (optval = ipoptp_first(&opts, (ipha_t *)ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { int off; opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; switch (optval) { case IPOPT_SSRR: case IPOPT_LSRR: /* * Insert ipha_dst as the first entry in the source * route and move down the entries on step. * The last entry gets placed at buf1. */ buf[IPOPT_OPTVAL] = optval; buf[IPOPT_OLEN] = optlen; buf[IPOPT_OFFSET] = optlen; off = optlen - IP_ADDR_LEN; if (off < 0) { /* No entries in source route */ break; } /* Last entry in source route */ bcopy(opt + off, buf1, IP_ADDR_LEN); off -= IP_ADDR_LEN; while (off > 0) { bcopy(opt + off, buf + off + IP_ADDR_LEN, IP_ADDR_LEN); off -= IP_ADDR_LEN; } /* ipha_dst into first slot */ bcopy(&ipha->ipha_dst, buf + off + IP_ADDR_LEN, IP_ADDR_LEN); buf += optlen; len += optlen; break; case IPOPT_COMSEC: case IPOPT_SECURITY: /* if passing up a label is not ok, then remove */ if (is_system_labeled()) break; /* FALLTHROUGH */ default: bcopy(opt, buf, optlen); buf += optlen; len += optlen; break; } } done: /* Pad the resulting options */ while (len & 0x3) { *buf++ = IPOPT_EOL; len++; } return (len); } /* * Update any record route or timestamp options to include this host. * Reverse any source route option. * This routine assumes that the options are well formed i.e. that they * have already been checked. */ static void icmp_options_update(ipha_t *ipha) { ipoptp_t opts; uchar_t *opt; uint8_t optval; ipaddr_t src; /* Our local address */ ipaddr_t dst; ip2dbg(("icmp_options_update\n")); src = ipha->ipha_src; dst = ipha->ipha_dst; for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0); opt = opts.ipoptp_cur; ip2dbg(("icmp_options_update: opt %d, len %d\n", optval, opts.ipoptp_len)); switch (optval) { int off1, off2; case IPOPT_SSRR: case IPOPT_LSRR: /* * Reverse the source route. The first entry * should be the next to last one in the current * source route (the last entry is our address). * The last entry should be the final destination. */ off1 = IPOPT_MINOFF_SR - 1; off2 = opt[IPOPT_OFFSET] - IP_ADDR_LEN - 1; if (off2 < 0) { /* No entries in source route */ ip1dbg(( "icmp_options_update: bad src route\n")); break; } bcopy((char *)opt + off2, &dst, IP_ADDR_LEN); bcopy(&ipha->ipha_dst, (char *)opt + off2, IP_ADDR_LEN); bcopy(&dst, &ipha->ipha_dst, IP_ADDR_LEN); off2 -= IP_ADDR_LEN; while (off1 < off2) { bcopy((char *)opt + off1, &src, IP_ADDR_LEN); bcopy((char *)opt + off2, (char *)opt + off1, IP_ADDR_LEN); bcopy(&src, (char *)opt + off2, IP_ADDR_LEN); off1 += IP_ADDR_LEN; off2 -= IP_ADDR_LEN; } opt[IPOPT_OFFSET] = IPOPT_MINOFF_SR; break; } } } /* * Process received ICMP Redirect messages. */ /* ARGSUSED */ static void icmp_redirect(mblk_t *mp) { ipha_t *ipha; int iph_hdr_length; icmph_t *icmph; ipha_t *ipha_err; ire_t *ire; ire_t *prev_ire; ire_t *save_ire; ipaddr_t src, dst, gateway; iulp_t ulp_info = { 0 }; int error; ipha = (ipha_t *)mp->b_rptr; iph_hdr_length = IPH_HDR_LENGTH(ipha); if (((mp->b_wptr - mp->b_rptr) - iph_hdr_length) < sizeof (icmph_t) + IP_SIMPLE_HDR_LENGTH) { BUMP_MIB(&icmp_mib, icmpInErrors); freemsg(mp); return; } icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha_err = (ipha_t *)&icmph[1]; src = ipha->ipha_src; dst = ipha_err->ipha_dst; gateway = icmph->icmph_rd_gateway; /* Make sure the new gateway is reachable somehow. */ ire = ire_route_lookup(gateway, 0, 0, IRE_INTERFACE, NULL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); /* * Make sure we had a route for the dest in question and that * that route was pointing to the old gateway (the source of the * redirect packet.) */ prev_ire = ire_route_lookup(dst, 0, src, 0, NULL, NULL, ALL_ZONES, NULL, MATCH_IRE_GW); /* * Check that * the redirect was not from ourselves * the new gateway and the old gateway are directly reachable */ if (!prev_ire || !ire || ire->ire_type == IRE_LOCAL) { BUMP_MIB(&icmp_mib, icmpInBadRedirects); freemsg(mp); if (ire != NULL) ire_refrele(ire); if (prev_ire != NULL) ire_refrele(prev_ire); return; } /* * Should we use the old ULP info to create the new gateway? From * a user's perspective, we should inherit the info so that it * is a "smooth" transition. If we do not do that, then new * connections going thru the new gateway will have no route metrics, * which is counter-intuitive to user. From a network point of * view, this may or may not make sense even though the new gateway * is still directly connected to us so the route metrics should not * change much. * * But if the old ire_uinfo is not initialized, we do another * recursive lookup on the dest using the new gateway. There may * be a route to that. If so, use it to initialize the redirect * route. */ if (prev_ire->ire_uinfo.iulp_set) { bcopy(&prev_ire->ire_uinfo, &ulp_info, sizeof (iulp_t)); } else { ire_t *tmp_ire; ire_t *sire; tmp_ire = ire_ftable_lookup(dst, 0, gateway, 0, NULL, &sire, ALL_ZONES, 0, NULL, (MATCH_IRE_RECURSIVE | MATCH_IRE_GW | MATCH_IRE_DEFAULT)); if (sire != NULL) { bcopy(&sire->ire_uinfo, &ulp_info, sizeof (iulp_t)); /* * If sire != NULL, ire_ftable_lookup() should not * return a NULL value. */ ASSERT(tmp_ire != NULL); ire_refrele(tmp_ire); ire_refrele(sire); } else if (tmp_ire != NULL) { bcopy(&tmp_ire->ire_uinfo, &ulp_info, sizeof (iulp_t)); ire_refrele(tmp_ire); } } if (prev_ire->ire_type == IRE_CACHE) ire_delete(prev_ire); ire_refrele(prev_ire); /* * TODO: more precise handling for cases 0, 2, 3, the latter two * require TOS routing */ switch (icmph->icmph_code) { case 0: case 1: /* TODO: TOS specificity for cases 2 and 3 */ case 2: case 3: break; default: freemsg(mp); BUMP_MIB(&icmp_mib, icmpInBadRedirects); ire_refrele(ire); return; } /* * Create a Route Association. This will allow us to remember that * someone we believe told us to use the particular gateway. */ save_ire = ire; ire = ire_create( (uchar_t *)&dst, /* dest addr */ (uchar_t *)&ip_g_all_ones, /* mask */ (uchar_t *)&save_ire->ire_src_addr, /* source addr */ (uchar_t *)&gateway, /* gateway addr */ NULL, /* no in_srcaddr */ &save_ire->ire_max_frag, /* max frag */ NULL, /* Fast Path header */ NULL, /* no rfq */ NULL, /* no stq */ IRE_HOST, NULL, NULL, NULL, 0, 0, 0, (RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST), &ulp_info, NULL, NULL); if (ire == NULL) { freemsg(mp); ire_refrele(save_ire); return; } error = ire_add(&ire, NULL, NULL, NULL, B_FALSE); ire_refrele(save_ire); atomic_inc_32(&ip_redirect_cnt); if (error == 0) { ire_refrele(ire); /* Held in ire_add_v4 */ /* tell routing sockets that we received a redirect */ ip_rts_change(RTM_REDIRECT, dst, gateway, IP_HOST_MASK, 0, src, (RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST), 0, (RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_AUTHOR)); } /* * Delete any existing IRE_HOST type redirect ires for this destination. * This together with the added IRE has the effect of * modifying an existing redirect. */ prev_ire = ire_ftable_lookup(dst, 0, src, IRE_HOST, NULL, NULL, ALL_ZONES, 0, NULL, (MATCH_IRE_GW | MATCH_IRE_TYPE)); if (prev_ire != NULL) { if (prev_ire ->ire_flags & RTF_DYNAMIC) ire_delete(prev_ire); ire_refrele(prev_ire); } freemsg(mp); } /* * Generate an ICMP parameter problem message. */ static void icmp_param_problem(queue_t *q, mblk_t *mp, uint8_t ptr, zoneid_t zoneid) { icmph_t icmph; boolean_t mctl_present; mblk_t *first_mp; EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (!(mp = icmp_pkt_err_ok(mp))) { if (mctl_present) freeb(first_mp); return; } bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_PARAM_PROBLEM; icmph.icmph_pp_ptr = ptr; BUMP_MIB(&icmp_mib, icmpOutParmProbs); icmp_pkt(q, first_mp, &icmph, sizeof (icmph_t), mctl_present, zoneid); } /* * Build and ship an IPv4 ICMP message using the packet data in mp, and * the ICMP header pointed to by "stuff". (May be called as writer.) * Note: assumes that icmp_pkt_err_ok has been called to verify that * an icmp error packet can be sent. * Assigns an appropriate source address to the packet. If ipha_dst is * one of our addresses use it for source. Otherwise pick a source based * on a route lookup back to ipha_src. * Note that ipha_src must be set here since the * packet is likely to arrive on an ill queue in ip_wput() which will * not set a source address. */ static void icmp_pkt(queue_t *q, mblk_t *mp, void *stuff, size_t len, boolean_t mctl_present, zoneid_t zoneid) { ipaddr_t dst; icmph_t *icmph; ipha_t *ipha; uint_t len_needed; size_t msg_len; mblk_t *mp1; ipaddr_t src; ire_t *ire; mblk_t *ipsec_mp; ipsec_out_t *io = NULL; boolean_t xmit_if_on = B_FALSE; if (mctl_present) { /* * If it is : * * 1) a IPSEC_OUT, then this is caused by outbound * datagram originating on this host. IPSEC processing * may or may not have been done. Refer to comments above * icmp_inbound_error_fanout for details. * * 2) a IPSEC_IN if we are generating a icmp_message * for an incoming datagram destined for us i.e called * from ip_fanout_send_icmp. */ ipsec_info_t *in; ipsec_mp = mp; mp = ipsec_mp->b_cont; in = (ipsec_info_t *)ipsec_mp->b_rptr; ipha = (ipha_t *)mp->b_rptr; ASSERT(in->ipsec_info_type == IPSEC_OUT || in->ipsec_info_type == IPSEC_IN); if (in->ipsec_info_type == IPSEC_IN) { /* * Convert the IPSEC_IN to IPSEC_OUT. */ if (!ipsec_in_to_out(ipsec_mp, ipha, NULL)) { BUMP_MIB(&ip_mib, ipOutDiscards); return; } io = (ipsec_out_t *)ipsec_mp->b_rptr; } else { ASSERT(in->ipsec_info_type == IPSEC_OUT); io = (ipsec_out_t *)in; if (io->ipsec_out_xmit_if) xmit_if_on = B_TRUE; /* * Clear out ipsec_out_proc_begin, so we do a fresh * ire lookup. */ io->ipsec_out_proc_begin = B_FALSE; } ASSERT(zoneid == io->ipsec_out_zoneid); ASSERT(zoneid != ALL_ZONES); } else { /* * This is in clear. The icmp message we are building * here should go out in clear. * * Pardon the convolution of it all, but it's easier to * allocate a "use cleartext" IPSEC_IN message and convert * it than it is to allocate a new one. */ ipsec_in_t *ii; ASSERT(DB_TYPE(mp) == M_DATA); if ((ipsec_mp = ipsec_in_alloc(B_TRUE)) == NULL) { freemsg(mp); BUMP_MIB(&ip_mib, ipOutDiscards); return; } ii = (ipsec_in_t *)ipsec_mp->b_rptr; /* This is not a secure packet */ ii->ipsec_in_secure = B_FALSE; /* * For trusted extensions using a shared IP address we can * send using any zoneid. */ if (zoneid == ALL_ZONES) ii->ipsec_in_zoneid = GLOBAL_ZONEID; else ii->ipsec_in_zoneid = zoneid; ipsec_mp->b_cont = mp; ipha = (ipha_t *)mp->b_rptr; /* * Convert the IPSEC_IN to IPSEC_OUT. */ if (!ipsec_in_to_out(ipsec_mp, ipha, NULL)) { BUMP_MIB(&ip_mib, ipOutDiscards); return; } io = (ipsec_out_t *)ipsec_mp->b_rptr; } /* Remember our eventual destination */ dst = ipha->ipha_src; ire = ire_route_lookup(ipha->ipha_dst, 0, 0, (IRE_LOCAL|IRE_LOOPBACK), NULL, NULL, zoneid, NULL, MATCH_IRE_TYPE); if (ire != NULL && (ire->ire_zoneid == zoneid || ire->ire_zoneid == ALL_ZONES)) { src = ipha->ipha_dst; } else if (!xmit_if_on) { if (ire != NULL) ire_refrele(ire); ire = ire_route_lookup(dst, 0, 0, 0, NULL, NULL, zoneid, NULL, (MATCH_IRE_DEFAULT|MATCH_IRE_RECURSIVE|MATCH_IRE_ZONEONLY)); if (ire == NULL) { BUMP_MIB(&ip_mib, ipOutNoRoutes); freemsg(ipsec_mp); return; } src = ire->ire_src_addr; } else { ipif_t *ipif = NULL; ill_t *ill; /* * This must be an ICMP error coming from * ip_mrtun_forward(). The src addr should * be equal to the IP-addr of the outgoing * interface. */ if (io == NULL) { /* This is not a IPSEC_OUT type control msg */ BUMP_MIB(&ip_mib, ipOutNoRoutes); freemsg(ipsec_mp); return; } ill = ill_lookup_on_ifindex(io->ipsec_out_ill_index, B_FALSE, NULL, NULL, NULL, NULL); if (ill != NULL) { ipif = ipif_get_next_ipif(NULL, ill); ill_refrele(ill); } if (ipif == NULL) { BUMP_MIB(&ip_mib, ipOutNoRoutes); freemsg(ipsec_mp); return; } src = ipif->ipif_src_addr; ipif_refrele(ipif); } if (ire != NULL) ire_refrele(ire); /* * Check if we can send back more then 8 bytes in addition * to the IP header. We will include as much as 64 bytes. */ len_needed = IPH_HDR_LENGTH(ipha); if (ipha->ipha_protocol == IPPROTO_ENCAP && (uchar_t *)ipha + len_needed + 1 <= mp->b_wptr) { len_needed += IPH_HDR_LENGTH(((uchar_t *)ipha + len_needed)); } len_needed += ip_icmp_return; msg_len = msgdsize(mp); if (msg_len > len_needed) { (void) adjmsg(mp, len_needed - msg_len); msg_len = len_needed; } mp1 = allocb(sizeof (icmp_ipha) + len, BPRI_HI); if (mp1 == NULL) { BUMP_MIB(&icmp_mib, icmpOutErrors); freemsg(ipsec_mp); return; } /* * On an unlabeled system, dblks don't necessarily have creds. */ ASSERT(!is_system_labeled() || DB_CRED(mp) != NULL); if (DB_CRED(mp) != NULL) mblk_setcred(mp1, DB_CRED(mp)); mp1->b_cont = mp; mp = mp1; ASSERT(ipsec_mp->b_datap->db_type == M_CTL && ipsec_mp->b_rptr == (uint8_t *)io && io->ipsec_out_type == IPSEC_OUT); ipsec_mp->b_cont = mp; /* * Set ipsec_out_icmp_loopback so we can let the ICMP messages this * node generates be accepted in peace by all on-host destinations. * If we do NOT assume that all on-host destinations trust * self-generated ICMP messages, then rework here, ip6.c, and spd.c. * (Look for ipsec_out_icmp_loopback). */ io->ipsec_out_icmp_loopback = B_TRUE; ipha = (ipha_t *)mp->b_rptr; mp1->b_wptr = (uchar_t *)ipha + (sizeof (icmp_ipha) + len); *ipha = icmp_ipha; ipha->ipha_src = src; ipha->ipha_dst = dst; ipha->ipha_ttl = ip_def_ttl; msg_len += sizeof (icmp_ipha) + len; if (msg_len > IP_MAXPACKET) { (void) adjmsg(mp, IP_MAXPACKET - msg_len); msg_len = IP_MAXPACKET; } ipha->ipha_length = htons((uint16_t)msg_len); icmph = (icmph_t *)&ipha[1]; bcopy(stuff, icmph, len); icmph->icmph_checksum = 0; icmph->icmph_checksum = IP_CSUM(mp, (int32_t)sizeof (ipha_t), 0); if (icmph->icmph_checksum == 0) icmph->icmph_checksum = 0xFFFF; BUMP_MIB(&icmp_mib, icmpOutMsgs); put(q, ipsec_mp); } /* * Determine if an ICMP error packet can be sent given the rate limit. * The limit consists of an average frequency (icmp_pkt_err_interval measured * in milliseconds) and a burst size. Burst size number of packets can * be sent arbitrarely closely spaced. * The state is tracked using two variables to implement an approximate * token bucket filter: * icmp_pkt_err_last - lbolt value when the last burst started * icmp_pkt_err_sent - number of packets sent in current burst */ boolean_t icmp_err_rate_limit(void) { clock_t now = TICK_TO_MSEC(lbolt); uint_t refilled; /* Number of packets refilled in tbf since last */ uint_t err_interval = ip_icmp_err_interval; /* Guard against changes */ if (err_interval == 0) return (B_FALSE); if (icmp_pkt_err_last > now) { /* 100HZ lbolt in ms for 32bit arch wraps every 49.7 days */ icmp_pkt_err_last = 0; icmp_pkt_err_sent = 0; } /* * If we are in a burst update the token bucket filter. * Update the "last" time to be close to "now" but make sure * we don't loose precision. */ if (icmp_pkt_err_sent != 0) { refilled = (now - icmp_pkt_err_last)/err_interval; if (refilled > icmp_pkt_err_sent) { icmp_pkt_err_sent = 0; } else { icmp_pkt_err_sent -= refilled; icmp_pkt_err_last += refilled * err_interval; } } if (icmp_pkt_err_sent == 0) { /* Start of new burst */ icmp_pkt_err_last = now; } if (icmp_pkt_err_sent < ip_icmp_err_burst) { icmp_pkt_err_sent++; ip1dbg(("icmp_err_rate_limit: %d sent in burst\n", icmp_pkt_err_sent)); return (B_FALSE); } ip1dbg(("icmp_err_rate_limit: dropped\n")); return (B_TRUE); } /* * Check if it is ok to send an IPv4 ICMP error packet in * response to the IPv4 packet in mp. * Free the message and return null if no * ICMP error packet should be sent. */ static mblk_t * icmp_pkt_err_ok(mblk_t *mp) { icmph_t *icmph; ipha_t *ipha; uint_t len_needed; ire_t *src_ire; ire_t *dst_ire; if (!mp) return (NULL); ipha = (ipha_t *)mp->b_rptr; if (ip_csum_hdr(ipha)) { BUMP_MIB(&ip_mib, ipInCksumErrs); freemsg(mp); return (NULL); } src_ire = ire_ctable_lookup(ipha->ipha_dst, 0, IRE_BROADCAST, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); dst_ire = ire_ctable_lookup(ipha->ipha_src, 0, IRE_BROADCAST, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (src_ire != NULL || dst_ire != NULL || CLASSD(ipha->ipha_dst) || CLASSD(ipha->ipha_src) || (ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_OFFSET)) { /* Note: only errors to the fragment with offset 0 */ BUMP_MIB(&icmp_mib, icmpOutDrops); freemsg(mp); if (src_ire != NULL) ire_refrele(src_ire); if (dst_ire != NULL) ire_refrele(dst_ire); return (NULL); } if (ipha->ipha_protocol == IPPROTO_ICMP) { /* * Check the ICMP type. RFC 1122 sez: don't send ICMP * errors in response to any ICMP errors. */ len_needed = IPH_HDR_LENGTH(ipha) + ICMPH_SIZE; if (mp->b_wptr - mp->b_rptr < len_needed) { if (!pullupmsg(mp, len_needed)) { BUMP_MIB(&icmp_mib, icmpInErrors); freemsg(mp); return (NULL); } ipha = (ipha_t *)mp->b_rptr; } icmph = (icmph_t *) (&((char *)ipha)[IPH_HDR_LENGTH(ipha)]); switch (icmph->icmph_type) { case ICMP_DEST_UNREACHABLE: case ICMP_SOURCE_QUENCH: case ICMP_TIME_EXCEEDED: case ICMP_PARAM_PROBLEM: case ICMP_REDIRECT: BUMP_MIB(&icmp_mib, icmpOutDrops); freemsg(mp); return (NULL); default: break; } } /* * If this is a labeled system, then check to see if we're allowed to * send a response to this particular sender. If not, then just drop. */ if (is_system_labeled() && !tsol_can_reply_error(mp)) { ip2dbg(("icmp_pkt_err_ok: can't respond to packet\n")); BUMP_MIB(&icmp_mib, icmpOutDrops); freemsg(mp); return (NULL); } if (icmp_err_rate_limit()) { /* * Only send ICMP error packets every so often. * This should be done on a per port/source basis, * but for now this will suffice. */ freemsg(mp); return (NULL); } return (mp); } /* * Generate an ICMP redirect message. */ static void icmp_send_redirect(queue_t *q, mblk_t *mp, ipaddr_t gateway) { icmph_t icmph; /* * We are called from ip_rput where we could * not have attached an IPSEC_IN. */ ASSERT(mp->b_datap->db_type == M_DATA); if (!(mp = icmp_pkt_err_ok(mp))) { return; } bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_REDIRECT; icmph.icmph_code = 1; icmph.icmph_rd_gateway = gateway; BUMP_MIB(&icmp_mib, icmpOutRedirects); /* Redirects sent by router, and router is global zone */ icmp_pkt(q, mp, &icmph, sizeof (icmph_t), B_FALSE, GLOBAL_ZONEID); } /* * Generate an ICMP time exceeded message. */ void icmp_time_exceeded(queue_t *q, mblk_t *mp, uint8_t code, zoneid_t zoneid) { icmph_t icmph; boolean_t mctl_present; mblk_t *first_mp; EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (!(mp = icmp_pkt_err_ok(mp))) { if (mctl_present) freeb(first_mp); return; } bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_TIME_EXCEEDED; icmph.icmph_code = code; BUMP_MIB(&icmp_mib, icmpOutTimeExcds); icmp_pkt(q, first_mp, &icmph, sizeof (icmph_t), mctl_present, zoneid); } /* * Generate an ICMP unreachable message. */ void icmp_unreachable(queue_t *q, mblk_t *mp, uint8_t code, zoneid_t zoneid) { icmph_t icmph; mblk_t *first_mp; boolean_t mctl_present; EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (!(mp = icmp_pkt_err_ok(mp))) { if (mctl_present) freeb(first_mp); return; } bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_DEST_UNREACHABLE; icmph.icmph_code = code; BUMP_MIB(&icmp_mib, icmpOutDestUnreachs); ip2dbg(("send icmp destination unreachable code %d\n", code)); icmp_pkt(q, first_mp, (char *)&icmph, sizeof (icmph_t), mctl_present, zoneid); } /* * Attempt to start recovery of an IPv4 interface that's been shut down as a * duplicate. As long as someone else holds the address, the interface will * stay down. When that conflict goes away, the interface is brought back up. * This is done so that accidental shutdowns of addresses aren't made * permanent. Your server will recover from a failure. * * For DHCP, recovery is not done in the kernel. Instead, it's handled by a * user space process (dhcpagent). * * Recovery completes if ARP reports that the address is now ours (via * AR_CN_READY). In that case, we go to ip_arp_excl to finish the operation. * * This function is entered on a timer expiry; the ID is in ipif_recovery_id. */ static void ipif_dup_recovery(void *arg) { ipif_t *ipif = arg; ill_t *ill = ipif->ipif_ill; mblk_t *arp_add_mp; mblk_t *arp_del_mp; area_t *area; ipif->ipif_recovery_id = 0; if (ill->ill_arp_closing || !(ipif->ipif_flags & IPIF_DUPLICATE) || (ipif->ipif_flags & IPIF_POINTOPOINT)) { /* No reason to try to bring this address back. */ return; } if ((arp_add_mp = ipif_area_alloc(ipif)) == NULL) goto alloc_fail; if (ipif->ipif_arp_del_mp == NULL) { if ((arp_del_mp = ipif_ared_alloc(ipif)) == NULL) goto alloc_fail; ipif->ipif_arp_del_mp = arp_del_mp; } /* Setting the 'unverified' flag restarts DAD */ area = (area_t *)arp_add_mp->b_rptr; area->area_flags = ACE_F_PERMANENT | ACE_F_PUBLISH | ACE_F_MYADDR | ACE_F_UNVERIFIED; putnext(ill->ill_rq, arp_add_mp); return; alloc_fail: /* On allocation failure, just restart the timer */ freemsg(arp_add_mp); if (ip_dup_recovery > 0) { ipif->ipif_recovery_id = timeout(ipif_dup_recovery, ipif, MSEC_TO_TICK(ip_dup_recovery)); } } /* * This is for exclusive changes due to ARP. Either tear down an interface due * to AR_CN_FAILED and AR_CN_BOGON, or bring one up for successful recovery. */ /* ARGSUSED */ static void ip_arp_excl(ipsq_t *ipsq, queue_t *rq, mblk_t *mp, void *dummy_arg) { ill_t *ill = rq->q_ptr; arh_t *arh; ipaddr_t src; ipif_t *ipif; char ibuf[LIFNAMSIZ + 10]; /* 10 digits for logical i/f number */ char hbuf[MAC_STR_LEN]; char sbuf[INET_ADDRSTRLEN]; const char *failtype; boolean_t bring_up; switch (((arcn_t *)mp->b_rptr)->arcn_code) { case AR_CN_READY: failtype = NULL; bring_up = B_TRUE; break; case AR_CN_FAILED: failtype = "in use"; bring_up = B_FALSE; break; default: failtype = "claimed"; bring_up = B_FALSE; break; } arh = (arh_t *)mp->b_cont->b_rptr; bcopy((char *)&arh[1] + arh->arh_hlen, &src, IP_ADDR_LEN); /* Handle failures due to probes */ if (src == 0) { bcopy((char *)&arh[1] + 2 * arh->arh_hlen + IP_ADDR_LEN, &src, IP_ADDR_LEN); } (void) strlcpy(ibuf, ill->ill_name, sizeof (ibuf)); (void) mac_colon_addr((uint8_t *)(arh + 1), arh->arh_hlen, hbuf, sizeof (hbuf)); (void) ip_dot_addr(src, sbuf); for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if ((ipif->ipif_flags & IPIF_POINTOPOINT) || ipif->ipif_lcl_addr != src) { continue; } /* * If we failed on a recovery probe, then restart the timer to * try again later. */ if (!bring_up && (ipif->ipif_flags & IPIF_DUPLICATE) && !(ipif->ipif_flags & (IPIF_DHCPRUNNING|IPIF_TEMPORARY)) && ill->ill_net_type == IRE_IF_RESOLVER && ip_dup_recovery > 0 && ipif->ipif_recovery_id == 0) { ipif->ipif_recovery_id = timeout(ipif_dup_recovery, ipif, MSEC_TO_TICK(ip_dup_recovery)); continue; } /* * If what we're trying to do has already been done, then do * nothing. */ if (bring_up == ((ipif->ipif_flags & IPIF_UP) != 0)) continue; if (ipif->ipif_id != 0) { (void) snprintf(ibuf + ill->ill_name_length - 1, sizeof (ibuf) - ill->ill_name_length + 1, ":%d", ipif->ipif_id); } if (failtype == NULL) { cmn_err(CE_NOTE, "recovered address %s on %s", sbuf, ibuf); } else { cmn_err(CE_WARN, "%s has duplicate address %s (%s " "by %s); disabled", ibuf, sbuf, failtype, hbuf); } if (bring_up) { ASSERT(ill->ill_dl_up); /* * Free up the ARP delete message so we can allocate * a fresh one through the normal path. */ freemsg(ipif->ipif_arp_del_mp); ipif->ipif_arp_del_mp = NULL; if (ipif_resolver_up(ipif, Res_act_initial) != EINPROGRESS) { ipif->ipif_addr_ready = 1; (void) ipif_up_done(ipif); } continue; } mutex_enter(&ill->ill_lock); ASSERT(!(ipif->ipif_flags & IPIF_DUPLICATE)); ipif->ipif_flags |= IPIF_DUPLICATE; ill->ill_ipif_dup_count++; mutex_exit(&ill->ill_lock); /* * Already exclusive on the ill; no need to handle deferred * processing here. */ (void) ipif_down(ipif, NULL, NULL); ipif_down_tail(ipif); if (!(ipif->ipif_flags & (IPIF_DHCPRUNNING|IPIF_TEMPORARY)) && ill->ill_net_type == IRE_IF_RESOLVER && ip_dup_recovery > 0) { ipif->ipif_recovery_id = timeout(ipif_dup_recovery, ipif, MSEC_TO_TICK(ip_dup_recovery)); } } freemsg(mp); } /* ARGSUSED */ static void ip_arp_defend(ipsq_t *ipsq, queue_t *rq, mblk_t *mp, void *dummy_arg) { ill_t *ill = rq->q_ptr; arh_t *arh; ipaddr_t src; ipif_t *ipif; arh = (arh_t *)mp->b_cont->b_rptr; bcopy((char *)&arh[1] + arh->arh_hlen, &src, IP_ADDR_LEN); for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if ((ipif->ipif_flags & IPIF_UP) && ipif->ipif_lcl_addr == src) (void) ipif_resolver_up(ipif, Res_act_defend); } freemsg(mp); } /* * News from ARP. ARP sends notification of interesting events down * to its clients using M_CTL messages with the interesting ARP packet * attached via b_cont. * The interesting event from a device comes up the corresponding ARP-IP-DEV * queue as opposed to ARP sending the message to all the clients, i.e. all * its ARP-IP-DEV instances. Thus, for AR_CN_ANNOUNCE, we must walk the cache * table if a cache IRE is found to delete all the entries for the address in * the packet. */ static void ip_arp_news(queue_t *q, mblk_t *mp) { arcn_t *arcn; arh_t *arh; ire_t *ire = NULL; char hbuf[MAC_STR_LEN]; char sbuf[INET_ADDRSTRLEN]; ipaddr_t src; in6_addr_t v6src; boolean_t isv6 = B_FALSE; ipif_t *ipif; ill_t *ill; if ((mp->b_wptr - mp->b_rptr) < sizeof (arcn_t) || !mp->b_cont) { if (q->q_next) { putnext(q, mp); } else freemsg(mp); return; } arh = (arh_t *)mp->b_cont->b_rptr; /* Is it one we are interested in? */ if (BE16_TO_U16(arh->arh_proto) == IP6_DL_SAP) { isv6 = B_TRUE; bcopy((char *)&arh[1] + (arh->arh_hlen & 0xFF), &v6src, IPV6_ADDR_LEN); } else if (BE16_TO_U16(arh->arh_proto) == IP_ARP_PROTO_TYPE) { bcopy((char *)&arh[1] + (arh->arh_hlen & 0xFF), &src, IP_ADDR_LEN); } else { freemsg(mp); return; } ill = q->q_ptr; arcn = (arcn_t *)mp->b_rptr; switch (arcn->arcn_code) { case AR_CN_BOGON: /* * Someone is sending ARP packets with a source protocol * address that we have published and for which we believe our * entry is authoritative and (when ill_arp_extend is set) * verified to be unique on the network. * * The ARP module internally handles the cases where the sender * is just probing (for DAD) and where the hardware address of * a non-authoritative entry has changed. Thus, these are the * real conflicts, and we have to do resolution. * * We back away quickly from the address if it's from DHCP or * otherwise temporary and hasn't been used recently (or at * all). We'd like to include "deprecated" addresses here as * well (as there's no real reason to defend something we're * discarding), but IPMP "reuses" this flag to mean something * other than the standard meaning. * * If the ARP module above is not extended (meaning that it * doesn't know how to defend the address), then we just log * the problem as we always did and continue on. It's not * right, but there's little else we can do, and those old ATM * users are going away anyway. */ (void) mac_colon_addr((uint8_t *)(arh + 1), arh->arh_hlen, hbuf, sizeof (hbuf)); (void) ip_dot_addr(src, sbuf); if (isv6) ire = ire_cache_lookup_v6(&v6src, ALL_ZONES, NULL); else ire = ire_cache_lookup(src, ALL_ZONES, NULL); if (ire != NULL && IRE_IS_LOCAL(ire)) { uint32_t now; uint32_t maxage; clock_t lused; uint_t maxdefense; uint_t defs; /* * First, figure out if this address hasn't been used * in a while. If it hasn't, then it's a better * candidate for abandoning. */ ipif = ire->ire_ipif; ASSERT(ipif != NULL); now = gethrestime_sec(); maxage = now - ire->ire_create_time; if (maxage > ip_max_temp_idle) maxage = ip_max_temp_idle; lused = drv_hztousec(ddi_get_lbolt() - ire->ire_last_used_time) / MICROSEC + 1; if (lused >= maxage && (ipif->ipif_flags & (IPIF_DHCPRUNNING | IPIF_TEMPORARY))) maxdefense = ip_max_temp_defend; else maxdefense = ip_max_defend; /* * Now figure out how many times we've defended * ourselves. Ignore defenses that happened long in * the past. */ mutex_enter(&ire->ire_lock); if ((defs = ire->ire_defense_count) > 0 && now - ire->ire_defense_time > ip_defend_interval) { ire->ire_defense_count = defs = 0; } ire->ire_defense_count++; ire->ire_defense_time = now; mutex_exit(&ire->ire_lock); ill_refhold(ill); ire_refrele(ire); /* * If we've defended ourselves too many times already, * then give up and tear down the interface(s) using * this address. Otherwise, defend by sending out a * gratuitous ARP. */ if (defs >= maxdefense && ill->ill_arp_extend) { (void) qwriter_ip(NULL, ill, q, mp, ip_arp_excl, CUR_OP, B_FALSE); } else { cmn_err(CE_WARN, "node %s is using our IP address %s on %s", hbuf, sbuf, ill->ill_name); /* * If this is an old (ATM) ARP module, then * don't try to defend the address. Remain * compatible with the old behavior. Defend * only with new ARP. */ if (ill->ill_arp_extend) { (void) qwriter_ip(NULL, ill, q, mp, ip_arp_defend, CUR_OP, B_FALSE); } else { ill_refrele(ill); } } return; } cmn_err(CE_WARN, "proxy ARP problem? Node '%s' is using %s on %s", hbuf, sbuf, ill->ill_name); if (ire != NULL) ire_refrele(ire); break; case AR_CN_ANNOUNCE: if (isv6) { /* * For XRESOLV interfaces. * Delete the IRE cache entry and NCE for this * v6 address */ ip_ire_clookup_and_delete_v6(&v6src); /* * If v6src is a non-zero, it's a router address * as below. Do the same sort of thing to clean * out off-net IRE_CACHE entries that go through * the router. */ if (!IN6_IS_ADDR_UNSPECIFIED(&v6src)) { ire_walk_v6(ire_delete_cache_gw_v6, (char *)&v6src, ALL_ZONES); } } else { nce_hw_map_t hwm; /* * ARP gives us a copy of any packet where it thinks * the address has changed, so that we can update our * caches. We're responsible for caching known answers * in the current design. We check whether the * hardware address really has changed in all of our * entries that have cached this mapping, and if so, we * blow them away. This way we will immediately pick * up the rare case of a host changing hardware * address. */ if (src == 0) break; hwm.hwm_addr = src; hwm.hwm_hwlen = arh->arh_hlen; hwm.hwm_hwaddr = (uchar_t *)(arh + 1); ndp_walk_common(&ndp4, NULL, (pfi_t)nce_delete_hw_changed, &hwm, ALL_ZONES); } break; case AR_CN_READY: /* No external v6 resolver has a contract to use this */ if (isv6) break; /* If the link is down, we'll retry this later */ if (!(ill->ill_phyint->phyint_flags & PHYI_RUNNING)) break; ipif = ipif_lookup_addr(src, ill, ALL_ZONES, NULL, NULL, NULL, NULL); if (ipif != NULL) { /* * If this is a duplicate recovery, then we now need to * go exclusive to bring this thing back up. */ if ((ipif->ipif_flags & (IPIF_UP|IPIF_DUPLICATE)) == IPIF_DUPLICATE) { ipif_refrele(ipif); ill_refhold(ill); (void) qwriter_ip(NULL, ill, q, mp, ip_arp_excl, CUR_OP, B_FALSE); return; } /* * If this is the first notice that this address is * ready, then let the user know now. */ if ((ipif->ipif_flags & IPIF_UP) && !ipif->ipif_addr_ready) { ipif_mask_reply(ipif); ip_rts_ifmsg(ipif); ip_rts_newaddrmsg(RTM_ADD, 0, ipif); sctp_update_ipif(ipif, SCTP_IPIF_UP); } ipif->ipif_addr_ready = 1; ipif_refrele(ipif); } ire = ire_cache_lookup(src, ALL_ZONES, MBLK_GETLABEL(mp)); if (ire != NULL) { ire->ire_defense_count = 0; ire_refrele(ire); } break; case AR_CN_FAILED: /* No external v6 resolver has a contract to use this */ if (isv6) break; ill_refhold(ill); (void) qwriter_ip(NULL, ill, q, mp, ip_arp_excl, CUR_OP, B_FALSE); return; } freemsg(mp); } /* * Create a mblk suitable for carrying the interface index and/or source link * address. This mblk is tagged as an M_CTL and is sent to ULP. This is used * when the IP_RECVIF and/or IP_RECVSLLA socket option is set by the user * application. */ mblk_t * ip_add_info(mblk_t *data_mp, ill_t *ill, uint_t flags) { mblk_t *mp; in_pktinfo_t *pinfo; ipha_t *ipha; struct ether_header *pether; mp = allocb(sizeof (in_pktinfo_t), BPRI_MED); if (mp == NULL) { ip1dbg(("ip_add_info: allocation failure.\n")); return (data_mp); } ipha = (ipha_t *)data_mp->b_rptr; pinfo = (in_pktinfo_t *)mp->b_rptr; bzero(pinfo, sizeof (in_pktinfo_t)); pinfo->in_pkt_flags = (uchar_t)flags; pinfo->in_pkt_ulp_type = IN_PKTINFO; /* Tell ULP what type of info */ if (flags & IPF_RECVIF) pinfo->in_pkt_ifindex = ill->ill_phyint->phyint_ifindex; pether = (struct ether_header *)((char *)ipha - sizeof (struct ether_header)); /* * Make sure the interface is an ethernet type, since this option * is currently supported only on this type of interface. Also make * sure we are pointing correctly above db_base. */ if ((flags & IPF_RECVSLLA) && ((uchar_t *)pether >= data_mp->b_datap->db_base) && (ill->ill_type == IFT_ETHER) && (ill->ill_net_type == IRE_IF_RESOLVER)) { pinfo->in_pkt_slla.sdl_type = IFT_ETHER; bcopy((uchar_t *)pether->ether_shost.ether_addr_octet, (uchar_t *)pinfo->in_pkt_slla.sdl_data, ETHERADDRL); } else { /* * Clear the bit. Indicate to upper layer that IP is not * sending this ancillary info. */ pinfo->in_pkt_flags = pinfo->in_pkt_flags & ~IPF_RECVSLLA; } mp->b_datap->db_type = M_CTL; mp->b_wptr += sizeof (in_pktinfo_t); mp->b_cont = data_mp; return (mp); } /* * Latch in the IPsec state for a stream based on the ipsec_in_t passed in as * part of the bind request. */ boolean_t ip_bind_ipsec_policy_set(conn_t *connp, mblk_t *policy_mp) { ipsec_in_t *ii; ASSERT(policy_mp != NULL); ASSERT(policy_mp->b_datap->db_type == IPSEC_POLICY_SET); ii = (ipsec_in_t *)policy_mp->b_rptr; ASSERT(ii->ipsec_in_type == IPSEC_IN); connp->conn_policy = ii->ipsec_in_policy; ii->ipsec_in_policy = NULL; if (ii->ipsec_in_action != NULL) { if (connp->conn_latch == NULL) { connp->conn_latch = iplatch_create(); if (connp->conn_latch == NULL) return (B_FALSE); } ipsec_latch_inbound(connp->conn_latch, ii); } return (B_TRUE); } /* * Upper level protocols (ULP) pass through bind requests to IP for inspection * and to arrange for power-fanout assist. The ULP is identified by * adding a single byte at the end of the original bind message. * A ULP other than UDP or TCP that wishes to be recognized passes * down a bind with a zero length address. * * The binding works as follows: * - A zero byte address means just bind to the protocol. * - A four byte address is treated as a request to validate * that the address is a valid local address, appropriate for * an application to bind to. This does not affect any fanout * information in IP. * - A sizeof sin_t byte address is used to bind to only the local address * and port. * - A sizeof ipa_conn_t byte address contains complete fanout information * consisting of local and remote addresses and ports. In * this case, the addresses are both validated as appropriate * for this operation, and, if so, the information is retained * for use in the inbound fanout. * * The ULP (except in the zero-length bind) can append an * additional mblk of db_type IRE_DB_REQ_TYPE or IPSEC_POLICY_SET to the * T_BIND_REQ/O_T_BIND_REQ. IRE_DB_REQ_TYPE indicates that the ULP wants * a copy of the source or destination IRE (source for local bind; * destination for complete bind). IPSEC_POLICY_SET indicates that the * policy information contained should be copied on to the conn. * * NOTE : Only one of IRE_DB_REQ_TYPE or IPSEC_POLICY_SET can be present. */ mblk_t * ip_bind_v4(queue_t *q, mblk_t *mp, conn_t *connp) { ssize_t len; struct T_bind_req *tbr; sin_t *sin; ipa_conn_t *ac; uchar_t *ucp; mblk_t *mp1; boolean_t ire_requested; boolean_t ipsec_policy_set = B_FALSE; int error = 0; int protocol; ipa_conn_x_t *acx; ASSERT(!connp->conn_af_isv6); connp->conn_pkt_isv6 = B_FALSE; len = MBLKL(mp); if (len < (sizeof (*tbr) + 1)) { (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "ip_bind: bogus msg, len %ld", len); /* XXX: Need to return something better */ goto bad_addr; } /* Back up and extract the protocol identifier. */ mp->b_wptr--; protocol = *mp->b_wptr & 0xFF; tbr = (struct T_bind_req *)mp->b_rptr; /* Reset the message type in preparation for shipping it back. */ DB_TYPE(mp) = M_PCPROTO; connp->conn_ulp = (uint8_t)protocol; /* * Check for a zero length address. This is from a protocol that * wants to register to receive all packets of its type. */ if (tbr->ADDR_length == 0) { /* * These protocols are now intercepted in ip_bind_v6(). * Reject protocol-level binds here for now. * * For SCTP raw socket, ICMP sends down a bind with sin_t * so that the protocol type cannot be SCTP. */ if (protocol == IPPROTO_TCP || protocol == IPPROTO_AH || protocol == IPPROTO_ESP || protocol == IPPROTO_SCTP) { goto bad_addr; } /* * * The udp module never sends down a zero-length address, * and allowing this on a labeled system will break MLP * functionality. */ if (is_system_labeled() && protocol == IPPROTO_UDP) goto bad_addr; if (connp->conn_mac_exempt) goto bad_addr; /* No hash here really. The table is big enough. */ connp->conn_srcv6 = ipv6_all_zeros; ipcl_proto_insert(connp, protocol); tbr->PRIM_type = T_BIND_ACK; return (mp); } /* Extract the address pointer from the message. */ ucp = (uchar_t *)mi_offset_param(mp, tbr->ADDR_offset, tbr->ADDR_length); if (ucp == NULL) { ip1dbg(("ip_bind: no address\n")); goto bad_addr; } if (!OK_32PTR(ucp)) { ip1dbg(("ip_bind: unaligned address\n")); goto bad_addr; } /* * Check for trailing mps. */ mp1 = mp->b_cont; ire_requested = (mp1 != NULL && DB_TYPE(mp1) == IRE_DB_REQ_TYPE); ipsec_policy_set = (mp1 != NULL && DB_TYPE(mp1) == IPSEC_POLICY_SET); switch (tbr->ADDR_length) { default: ip1dbg(("ip_bind: bad address length %d\n", (int)tbr->ADDR_length)); goto bad_addr; case IP_ADDR_LEN: /* Verification of local address only */ error = ip_bind_laddr(connp, mp, *(ipaddr_t *)ucp, 0, ire_requested, ipsec_policy_set, B_FALSE); break; case sizeof (sin_t): sin = (sin_t *)ucp; error = ip_bind_laddr(connp, mp, sin->sin_addr.s_addr, sin->sin_port, ire_requested, ipsec_policy_set, B_TRUE); break; case sizeof (ipa_conn_t): ac = (ipa_conn_t *)ucp; /* For raw socket, the local port is not set. */ if (ac->ac_lport == 0) ac->ac_lport = connp->conn_lport; /* Always verify destination reachability. */ error = ip_bind_connected(connp, mp, &ac->ac_laddr, ac->ac_lport, ac->ac_faddr, ac->ac_fport, ire_requested, ipsec_policy_set, B_TRUE, B_TRUE); break; case sizeof (ipa_conn_x_t): acx = (ipa_conn_x_t *)ucp; /* * Whether or not to verify destination reachability depends * on the setting of the ACX_VERIFY_DST flag in acx->acx_flags. */ error = ip_bind_connected(connp, mp, &acx->acx_conn.ac_laddr, acx->acx_conn.ac_lport, acx->acx_conn.ac_faddr, acx->acx_conn.ac_fport, ire_requested, ipsec_policy_set, B_TRUE, (acx->acx_flags & ACX_VERIFY_DST) != 0); break; } if (error == EINPROGRESS) return (NULL); else if (error != 0) goto bad_addr; /* * Pass the IPSEC headers size in ire_ipsec_overhead. * We can't do this in ip_bind_insert_ire because the policy * may not have been inherited at that point in time and hence * conn_out_enforce_policy may not be set. */ mp1 = mp->b_cont; if (ire_requested && connp->conn_out_enforce_policy && mp1 != NULL && DB_TYPE(mp1) == IRE_DB_REQ_TYPE) { ire_t *ire = (ire_t *)mp1->b_rptr; ASSERT(MBLKL(mp1) >= sizeof (ire_t)); ire->ire_ipsec_overhead = conn_ipsec_length(connp); } /* Send it home. */ mp->b_datap->db_type = M_PCPROTO; tbr->PRIM_type = T_BIND_ACK; return (mp); bad_addr: /* * If error = -1 then we generate a TBADADDR - otherwise error is * a unix errno. */ if (error > 0) mp = mi_tpi_err_ack_alloc(mp, TSYSERR, error); else mp = mi_tpi_err_ack_alloc(mp, TBADADDR, 0); return (mp); } /* * Here address is verified to be a valid local address. * If the IRE_DB_REQ_TYPE mp is present, a broadcast/multicast * address is also considered a valid local address. * In the case of a broadcast/multicast address, however, the * upper protocol is expected to reset the src address * to 0 if it sees a IRE_BROADCAST type returned so that * no packets are emitted with broadcast/multicast address as * source address (that violates hosts requirements RFC1122) * The addresses valid for bind are: * (1) - INADDR_ANY (0) * (2) - IP address of an UP interface * (3) - IP address of a DOWN interface * (4) - valid local IP broadcast addresses. In this case * the conn will only receive packets destined to * the specified broadcast address. * (5) - a multicast address. In this case * the conn will only receive packets destined to * the specified multicast address. Note: the * application still has to issue an * IP_ADD_MEMBERSHIP socket option. * * On error, return -1 for TBADADDR otherwise pass the * errno with TSYSERR reply. * * In all the above cases, the bound address must be valid in the current zone. * When the address is loopback, multicast or broadcast, there might be many * matching IREs so bind has to look up based on the zone. * * Note: lport is in network byte order. */ int ip_bind_laddr(conn_t *connp, mblk_t *mp, ipaddr_t src_addr, uint16_t lport, boolean_t ire_requested, boolean_t ipsec_policy_set, boolean_t fanout_insert) { int error = 0; ire_t *src_ire; mblk_t *policy_mp; ipif_t *ipif; zoneid_t zoneid; if (ipsec_policy_set) { policy_mp = mp->b_cont; } /* * If it was previously connected, conn_fully_bound would have * been set. */ connp->conn_fully_bound = B_FALSE; src_ire = NULL; ipif = NULL; zoneid = IPCL_ZONEID(connp); if (src_addr) { src_ire = ire_route_lookup(src_addr, 0, 0, 0, NULL, NULL, zoneid, NULL, MATCH_IRE_ZONEONLY); /* * If an address other than 0.0.0.0 is requested, * we verify that it is a valid address for bind * Note: Following code is in if-else-if form for * readability compared to a condition check. */ /* LINTED - statement has no consequent */ if (IRE_IS_LOCAL(src_ire)) { /* * (2) Bind to address of local UP interface */ } else if (src_ire && src_ire->ire_type == IRE_BROADCAST) { /* * (4) Bind to broadcast address * Note: permitted only from transports that * request IRE */ if (!ire_requested) error = EADDRNOTAVAIL; } else { /* * (3) Bind to address of local DOWN interface * (ipif_lookup_addr() looks up all interfaces * but we do not get here for UP interfaces * - case (2) above) * We put the protocol byte back into the mblk * since we may come back via ip_wput_nondata() * later with this mblk if ipif_lookup_addr chooses * to defer processing. */ *mp->b_wptr++ = (char)connp->conn_ulp; if ((ipif = ipif_lookup_addr(src_addr, NULL, zoneid, CONNP_TO_WQ(connp), mp, ip_wput_nondata, &error)) != NULL) { ipif_refrele(ipif); } else if (error == EINPROGRESS) { if (src_ire != NULL) ire_refrele(src_ire); return (EINPROGRESS); } else if (CLASSD(src_addr)) { error = 0; if (src_ire != NULL) ire_refrele(src_ire); /* * (5) bind to multicast address. * Fake out the IRE returned to upper * layer to be a broadcast IRE. */ src_ire = ire_ctable_lookup( INADDR_BROADCAST, INADDR_ANY, IRE_BROADCAST, NULL, zoneid, NULL, (MATCH_IRE_TYPE | MATCH_IRE_ZONEONLY)); if (src_ire == NULL || !ire_requested) error = EADDRNOTAVAIL; } else { /* * Not a valid address for bind */ error = EADDRNOTAVAIL; } /* * Just to keep it consistent with the processing in * ip_bind_v4() */ mp->b_wptr--; } if (error) { /* Red Alert! Attempting to be a bogon! */ ip1dbg(("ip_bind: bad src address 0x%x\n", ntohl(src_addr))); goto bad_addr; } } /* * Allow setting new policies. For example, disconnects come * down as ipa_t bind. As we would have set conn_policy_cached * to B_TRUE before, we should set it to B_FALSE, so that policy * can change after the disconnect. */ connp->conn_policy_cached = B_FALSE; /* * If not fanout_insert this was just an address verification */ if (fanout_insert) { /* * The addresses have been verified. Time to insert in * the correct fanout list. */ IN6_IPADDR_TO_V4MAPPED(src_addr, &connp->conn_srcv6); IN6_IPADDR_TO_V4MAPPED(INADDR_ANY, &connp->conn_remv6); connp->conn_lport = lport; connp->conn_fport = 0; /* * Do we need to add a check to reject Multicast packets * * We need to make sure that the conn_recv is set to a non-null * value before we insert the conn into the classifier table. * This is to avoid a race with an incoming packet which does an * ipcl_classify(). */ if (*mp->b_wptr == IPPROTO_TCP) connp->conn_recv = tcp_conn_request; error = ipcl_bind_insert(connp, *mp->b_wptr, src_addr, lport); } if (error == 0) { if (ire_requested) { if (!ip_bind_insert_ire(mp, src_ire, NULL)) { error = -1; /* Falls through to bad_addr */ } } else if (ipsec_policy_set) { if (!ip_bind_ipsec_policy_set(connp, policy_mp)) { error = -1; /* Falls through to bad_addr */ } } } else if (connp->conn_ulp == IPPROTO_TCP) { connp->conn_recv = tcp_input; } bad_addr: if (error != 0) { if (connp->conn_anon_port) { (void) tsol_mlp_anon(crgetzone(connp->conn_cred), connp->conn_mlp_type, connp->conn_ulp, ntohs(lport), B_FALSE); } connp->conn_mlp_type = mlptSingle; } if (src_ire != NULL) IRE_REFRELE(src_ire); if (ipsec_policy_set) { ASSERT(policy_mp == mp->b_cont); ASSERT(policy_mp != NULL); freeb(policy_mp); /* * As of now assume that nothing else accompanies * IPSEC_POLICY_SET. */ mp->b_cont = NULL; } return (error); } /* * Verify that both the source and destination addresses * are valid. If verify_dst is false, then the destination address may be * unreachable, i.e. have no route to it. Protocols like TCP want to verify * destination reachability, while tunnels do not. * Note that we allow connect to broadcast and multicast * addresses when ire_requested is set. Thus the ULP * has to check for IRE_BROADCAST and multicast. * * Returns zero if ok. * On error: returns -1 to mean TBADADDR otherwise returns an errno * (for use with TSYSERR reply). * * Note: lport and fport are in network byte order. */ int ip_bind_connected(conn_t *connp, mblk_t *mp, ipaddr_t *src_addrp, uint16_t lport, ipaddr_t dst_addr, uint16_t fport, boolean_t ire_requested, boolean_t ipsec_policy_set, boolean_t fanout_insert, boolean_t verify_dst) { ire_t *src_ire; ire_t *dst_ire; int error = 0; int protocol; mblk_t *policy_mp; ire_t *sire = NULL; ire_t *md_dst_ire = NULL; ire_t *lso_dst_ire = NULL; ill_t *ill = NULL; zoneid_t zoneid; ipaddr_t src_addr = *src_addrp; src_ire = dst_ire = NULL; protocol = *mp->b_wptr & 0xFF; /* * If we never got a disconnect before, clear it now. */ connp->conn_fully_bound = B_FALSE; if (ipsec_policy_set) { policy_mp = mp->b_cont; } zoneid = IPCL_ZONEID(connp); if (CLASSD(dst_addr)) { /* Pick up an IRE_BROADCAST */ dst_ire = ire_route_lookup(ip_g_all_ones, 0, 0, 0, NULL, NULL, zoneid, MBLK_GETLABEL(mp), (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | MATCH_IRE_RJ_BHOLE | MATCH_IRE_SECATTR)); } else { /* * If conn_dontroute is set or if conn_nexthop_set is set, * and onlink ipif is not found set ENETUNREACH error. */ if (connp->conn_dontroute || connp->conn_nexthop_set) { ipif_t *ipif; ipif = ipif_lookup_onlink_addr(connp->conn_dontroute ? dst_addr : connp->conn_nexthop_v4, connp->conn_zoneid); if (ipif == NULL) { error = ENETUNREACH; goto bad_addr; } ipif_refrele(ipif); } if (connp->conn_nexthop_set) { dst_ire = ire_route_lookup(connp->conn_nexthop_v4, 0, 0, 0, NULL, NULL, zoneid, MBLK_GETLABEL(mp), MATCH_IRE_SECATTR); } else { dst_ire = ire_route_lookup(dst_addr, 0, 0, 0, NULL, &sire, zoneid, MBLK_GETLABEL(mp), (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | MATCH_IRE_PARENT | MATCH_IRE_RJ_BHOLE | MATCH_IRE_SECATTR)); } } /* * dst_ire can't be a broadcast when not ire_requested. * We also prevent ire's with src address INADDR_ANY to * be used, which are created temporarily for * sending out packets from endpoints that have * conn_unspec_src set. If verify_dst is true, the destination must be * reachable. If verify_dst is false, the destination needn't be * reachable. * * If we match on a reject or black hole, then we've got a * local failure. May as well fail out the connect() attempt, * since it's never going to succeed. */ if (dst_ire == NULL || dst_ire->ire_src_addr == INADDR_ANY || (dst_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) || ((dst_ire->ire_type & IRE_BROADCAST) && !ire_requested)) { /* * If we're verifying destination reachability, we always want * to complain here. * * If we're not verifying destination reachability but the * destination has a route, we still want to fail on the * temporary address and broadcast address tests. */ if (verify_dst || (dst_ire != NULL)) { if (ip_debug > 2) { pr_addr_dbg("ip_bind_connected: bad connected " "dst %s\n", AF_INET, &dst_addr); } if (dst_ire == NULL || !(dst_ire->ire_type & IRE_HOST)) error = ENETUNREACH; else error = EHOSTUNREACH; goto bad_addr; } } /* * We now know that routing will allow us to reach the destination. * Check whether Trusted Solaris policy allows communication with this * host, and pretend that the destination is unreachable if not. * * This is never a problem for TCP, since that transport is known to * compute the label properly as part of the tcp_rput_other T_BIND_ACK * handling. If the remote is unreachable, it will be detected at that * point, so there's no reason to check it here. * * Note that for sendto (and other datagram-oriented friends), this * check is done as part of the data path label computation instead. * The check here is just to make non-TCP connect() report the right * error. */ if (dst_ire != NULL && is_system_labeled() && !IPCL_IS_TCP(connp) && tsol_compute_label(DB_CREDDEF(mp, connp->conn_cred), dst_addr, NULL, connp->conn_mac_exempt) != 0) { error = EHOSTUNREACH; if (ip_debug > 2) { pr_addr_dbg("ip_bind_connected: no label for dst %s\n", AF_INET, &dst_addr); } goto bad_addr; } /* * If the app does a connect(), it means that it will most likely * send more than 1 packet to the destination. It makes sense * to clear the temporary flag. */ if (dst_ire != NULL && dst_ire->ire_type == IRE_CACHE && (dst_ire->ire_marks & IRE_MARK_TEMPORARY)) { irb_t *irb = dst_ire->ire_bucket; rw_enter(&irb->irb_lock, RW_WRITER); dst_ire->ire_marks &= ~IRE_MARK_TEMPORARY; irb->irb_tmp_ire_cnt--; rw_exit(&irb->irb_lock); } /* * See if we should notify ULP about LSO/MDT; we do this whether or not * ire_requested is TRUE, in order to handle active connects; LSO/MDT * eligibility tests for passive connects are handled separately * through tcp_adapt_ire(). We do this before the source address * selection, because dst_ire may change after a call to * ipif_select_source(). This is a best-effort check, as the * packet for this connection may not actually go through * dst_ire->ire_stq, and the exact IRE can only be known after * calling ip_newroute(). This is why we further check on the * IRE during LSO/Multidata packet transmission in * tcp_lsosend()/tcp_multisend(). */ if (!ipsec_policy_set && dst_ire != NULL && !(dst_ire->ire_type & (IRE_LOCAL | IRE_LOOPBACK | IRE_BROADCAST)) && (ill = ire_to_ill(dst_ire), ill != NULL)) { if (ip_lso_outbound && ILL_LSO_CAPABLE(ill)) { lso_dst_ire = dst_ire; IRE_REFHOLD(lso_dst_ire); } else if (ip_multidata_outbound && ILL_MDT_CAPABLE(ill)) { md_dst_ire = dst_ire; IRE_REFHOLD(md_dst_ire); } } if (dst_ire != NULL && dst_ire->ire_type == IRE_LOCAL && dst_ire->ire_zoneid != zoneid && dst_ire->ire_zoneid != ALL_ZONES) { /* * If the IRE belongs to a different zone, look for a matching * route in the forwarding table and use the source address from * that route. */ src_ire = ire_ftable_lookup(dst_addr, 0, 0, 0, NULL, NULL, zoneid, 0, NULL, MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | MATCH_IRE_RJ_BHOLE); if (src_ire == NULL) { error = EHOSTUNREACH; goto bad_addr; } else if (src_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { if (!(src_ire->ire_type & IRE_HOST)) error = ENETUNREACH; else error = EHOSTUNREACH; goto bad_addr; } if (src_addr == INADDR_ANY) src_addr = src_ire->ire_src_addr; ire_refrele(src_ire); src_ire = NULL; } else if ((src_addr == INADDR_ANY) && (dst_ire != NULL)) { if ((sire != NULL) && (sire->ire_flags & RTF_SETSRC)) { src_addr = sire->ire_src_addr; ire_refrele(dst_ire); dst_ire = sire; sire = NULL; } else { /* * Pick a source address so that a proper inbound * load spreading would happen. */ ill_t *dst_ill = dst_ire->ire_ipif->ipif_ill; ipif_t *src_ipif = NULL; ire_t *ipif_ire; /* * Supply a local source address such that inbound * load spreading happens. * * Determine the best source address on this ill for * the destination. * * 1) For broadcast, we should return a broadcast ire * found above so that upper layers know that the * destination address is a broadcast address. * * 2) If this is part of a group, select a better * source address so that better inbound load * balancing happens. Do the same if the ipif * is DEPRECATED. * * 3) If the outgoing interface is part of a usesrc * group, then try selecting a source address from * the usesrc ILL. */ if ((dst_ire->ire_zoneid != zoneid && dst_ire->ire_zoneid != ALL_ZONES) || (!(dst_ire->ire_type & IRE_BROADCAST) && ((dst_ill->ill_group != NULL) || (dst_ire->ire_ipif->ipif_flags & IPIF_DEPRECATED) || (dst_ill->ill_usesrc_ifindex != 0)))) { /* * If the destination is reachable via a * given gateway, the selected source address * should be in the same subnet as the gateway. * Otherwise, the destination is not reachable. * * If there are no interfaces on the same subnet * as the destination, ipif_select_source gives * first non-deprecated interface which might be * on a different subnet than the gateway. * This is not desirable. Hence pass the dst_ire * source address to ipif_select_source. * It is sure that the destination is reachable * with the dst_ire source address subnet. * So passing dst_ire source address to * ipif_select_source will make sure that the * selected source will be on the same subnet * as dst_ire source address. */ ipaddr_t saddr = dst_ire->ire_ipif->ipif_src_addr; src_ipif = ipif_select_source(dst_ill, saddr, zoneid); if (src_ipif != NULL) { if (IS_VNI(src_ipif->ipif_ill)) { /* * For VNI there is no * interface route */ src_addr = src_ipif->ipif_src_addr; } else { ipif_ire = ipif_to_ire(src_ipif); if (ipif_ire != NULL) { IRE_REFRELE(dst_ire); dst_ire = ipif_ire; } src_addr = dst_ire->ire_src_addr; } ipif_refrele(src_ipif); } else { src_addr = dst_ire->ire_src_addr; } } else { src_addr = dst_ire->ire_src_addr; } } } /* * We do ire_route_lookup() here (and not * interface lookup as we assert that * src_addr should only come from an * UP interface for hard binding. */ ASSERT(src_ire == NULL); src_ire = ire_route_lookup(src_addr, 0, 0, 0, NULL, NULL, zoneid, NULL, MATCH_IRE_ZONEONLY); /* src_ire must be a local|loopback */ if (!IRE_IS_LOCAL(src_ire)) { if (ip_debug > 2) { pr_addr_dbg("ip_bind_connected: bad connected " "src %s\n", AF_INET, &src_addr); } error = EADDRNOTAVAIL; goto bad_addr; } /* * If the source address is a loopback address, the * destination had best be local or multicast. * The transports that can't handle multicast will reject * those addresses. */ if (src_ire->ire_type == IRE_LOOPBACK && !(IRE_IS_LOCAL(dst_ire) || CLASSD(dst_addr))) { ip1dbg(("ip_bind_connected: bad connected loopback\n")); error = -1; goto bad_addr; } /* * Allow setting new policies. For example, disconnects come * down as ipa_t bind. As we would have set conn_policy_cached * to B_TRUE before, we should set it to B_FALSE, so that policy * can change after the disconnect. */ connp->conn_policy_cached = B_FALSE; /* * Set the conn addresses/ports immediately, so the IPsec policy calls * can handle their passed-in conn's. */ IN6_IPADDR_TO_V4MAPPED(src_addr, &connp->conn_srcv6); IN6_IPADDR_TO_V4MAPPED(dst_addr, &connp->conn_remv6); connp->conn_lport = lport; connp->conn_fport = fport; *src_addrp = src_addr; ASSERT(!(ipsec_policy_set && ire_requested)); if (ire_requested) { iulp_t *ulp_info = NULL; /* * Note that sire will not be NULL if this is an off-link * connection and there is not cache for that dest yet. * * XXX Because of an existing bug, if there are multiple * default routes, the IRE returned now may not be the actual * default route used (default routes are chosen in a * round robin fashion). So if the metrics for different * default routes are different, we may return the wrong * metrics. This will not be a problem if the existing * bug is fixed. */ if (sire != NULL) { ulp_info = &(sire->ire_uinfo); } if (!ip_bind_insert_ire(mp, dst_ire, ulp_info)) { error = -1; goto bad_addr; } } else if (ipsec_policy_set) { if (!ip_bind_ipsec_policy_set(connp, policy_mp)) { error = -1; goto bad_addr; } } /* * Cache IPsec policy in this conn. If we have per-socket policy, * we'll cache that. If we don't, we'll inherit global policy. * * We can't insert until the conn reflects the policy. Note that * conn_policy_cached is set by ipsec_conn_cache_policy() even for * connections where we don't have a policy. This is to prevent * global policy lookups in the inbound path. * * If we insert before we set conn_policy_cached, * CONN_INBOUND_POLICY_PRESENT() check can still evaluate true * because global policy cound be non-empty. We normally call * ipsec_check_policy() for conn_policy_cached connections only if * ipc_in_enforce_policy is set. But in this case, * conn_policy_cached can get set anytime since we made the * CONN_INBOUND_POLICY_PRESENT() check and ipsec_check_policy() is * called, which will make the above assumption false. Thus, we * need to insert after we set conn_policy_cached. */ if ((error = ipsec_conn_cache_policy(connp, B_TRUE)) != 0) goto bad_addr; if (fanout_insert) { /* * The addresses have been verified. Time to insert in * the correct fanout list. * We need to make sure that the conn_recv is set to a non-null * value before we insert into the classifier table to avoid a * race with an incoming packet which does an ipcl_classify(). */ if (protocol == IPPROTO_TCP) connp->conn_recv = tcp_input; error = ipcl_conn_insert(connp, protocol, src_addr, dst_addr, connp->conn_ports); } if (error == 0) { connp->conn_fully_bound = B_TRUE; /* * Our initial checks for LSO/MDT have passed; the IRE is not * LOCAL/LOOPBACK/BROADCAST, and the link layer seems to * be supporting LSO/MDT. Pass the IRE, IPC and ILL into * ip_xxinfo_return(), which performs further checks * against them and upon success, returns the LSO/MDT info * mblk which we will attach to the bind acknowledgment. */ if (lso_dst_ire != NULL) { mblk_t *lsoinfo_mp; ASSERT(ill->ill_lso_capab != NULL); if ((lsoinfo_mp = ip_lsoinfo_return(lso_dst_ire, connp, ill->ill_name, ill->ill_lso_capab)) != NULL) linkb(mp, lsoinfo_mp); } else if (md_dst_ire != NULL) { mblk_t *mdinfo_mp; ASSERT(ill->ill_mdt_capab != NULL); if ((mdinfo_mp = ip_mdinfo_return(md_dst_ire, connp, ill->ill_name, ill->ill_mdt_capab)) != NULL) linkb(mp, mdinfo_mp); } } bad_addr: if (ipsec_policy_set) { ASSERT(policy_mp == mp->b_cont); ASSERT(policy_mp != NULL); freeb(policy_mp); /* * As of now assume that nothing else accompanies * IPSEC_POLICY_SET. */ mp->b_cont = NULL; } if (src_ire != NULL) IRE_REFRELE(src_ire); if (dst_ire != NULL) IRE_REFRELE(dst_ire); if (sire != NULL) IRE_REFRELE(sire); if (md_dst_ire != NULL) IRE_REFRELE(md_dst_ire); if (lso_dst_ire != NULL) IRE_REFRELE(lso_dst_ire); return (error); } /* * Insert the ire in b_cont. Returns false if it fails (due to lack of space). * Prefers dst_ire over src_ire. */ static boolean_t ip_bind_insert_ire(mblk_t *mp, ire_t *ire, iulp_t *ulp_info) { mblk_t *mp1; ire_t *ret_ire = NULL; mp1 = mp->b_cont; ASSERT(mp1 != NULL); if (ire != NULL) { /* * mp1 initialized above to IRE_DB_REQ_TYPE * appended mblk. Its 's * job to make sure there is room. */ if ((mp1->b_datap->db_lim - mp1->b_rptr) < sizeof (ire_t)) return (0); mp1->b_datap->db_type = IRE_DB_TYPE; mp1->b_wptr = mp1->b_rptr + sizeof (ire_t); bcopy(ire, mp1->b_rptr, sizeof (ire_t)); ret_ire = (ire_t *)mp1->b_rptr; /* * Pass the latest setting of the ip_path_mtu_discovery and * copy the ulp info if any. */ ret_ire->ire_frag_flag |= (ip_path_mtu_discovery) ? IPH_DF : 0; if (ulp_info != NULL) { bcopy(ulp_info, &(ret_ire->ire_uinfo), sizeof (iulp_t)); } ret_ire->ire_mp = mp1; } else { /* * No IRE was found. Remove IRE mblk. */ mp->b_cont = mp1->b_cont; freeb(mp1); } return (1); } /* * Carve "len" bytes out of an mblk chain, consuming any we empty, and duping * the final piece where we don't. Return a pointer to the first mblk in the * result, and update the pointer to the next mblk to chew on. If anything * goes wrong (i.e., dupb fails), we waste everything in sight and return a * NULL pointer. */ mblk_t * ip_carve_mp(mblk_t **mpp, ssize_t len) { mblk_t *mp0; mblk_t *mp1; mblk_t *mp2; if (!len || !mpp || !(mp0 = *mpp)) return (NULL); /* If we aren't going to consume the first mblk, we need a dup. */ if (mp0->b_wptr - mp0->b_rptr > len) { mp1 = dupb(mp0); if (mp1) { /* Partition the data between the two mblks. */ mp1->b_wptr = mp1->b_rptr + len; mp0->b_rptr = mp1->b_wptr; /* * after adjustments if mblk not consumed is now * unaligned, try to align it. If this fails free * all messages and let upper layer recover. */ if (!OK_32PTR(mp0->b_rptr)) { if (!pullupmsg(mp0, -1)) { freemsg(mp0); freemsg(mp1); *mpp = NULL; return (NULL); } } } return (mp1); } /* Eat through as many mblks as we need to get len bytes. */ len -= mp0->b_wptr - mp0->b_rptr; for (mp2 = mp1 = mp0; (mp2 = mp2->b_cont) != 0 && len; mp1 = mp2) { if (mp2->b_wptr - mp2->b_rptr > len) { /* * We won't consume the entire last mblk. Like * above, dup and partition it. */ mp1->b_cont = dupb(mp2); mp1 = mp1->b_cont; if (!mp1) { /* * Trouble. Rather than go to a lot of * trouble to clean up, we free the messages. * This won't be any worse than losing it on * the wire. */ freemsg(mp0); freemsg(mp2); *mpp = NULL; return (NULL); } mp1->b_wptr = mp1->b_rptr + len; mp2->b_rptr = mp1->b_wptr; /* * after adjustments if mblk not consumed is now * unaligned, try to align it. If this fails free * all messages and let upper layer recover. */ if (!OK_32PTR(mp2->b_rptr)) { if (!pullupmsg(mp2, -1)) { freemsg(mp0); freemsg(mp2); *mpp = NULL; return (NULL); } } *mpp = mp2; return (mp0); } /* Decrement len by the amount we just got. */ len -= mp2->b_wptr - mp2->b_rptr; } /* * len should be reduced to zero now. If not our caller has * screwed up. */ if (len) { /* Shouldn't happen! */ freemsg(mp0); *mpp = NULL; return (NULL); } /* * We consumed up to exactly the end of an mblk. Detach the part * we are returning from the rest of the chain. */ mp1->b_cont = NULL; *mpp = mp2; return (mp0); } /* The ill stream is being unplumbed. Called from ip_close */ int ip_modclose(ill_t *ill) { boolean_t success; ipsq_t *ipsq; ipif_t *ipif; queue_t *q = ill->ill_rq; hook_nic_event_t *info; /* * Forcibly enter the ipsq after some delay. This is to take * care of the case when some ioctl does not complete because * we sent a control message to the driver and it did not * send us a reply. We want to be able to at least unplumb * and replumb rather than force the user to reboot the system. */ success = ipsq_enter(ill, B_FALSE); /* * Open/close/push/pop is guaranteed to be single threaded * per stream by STREAMS. FS guarantees that all references * from top are gone before close is called. So there can't * be another close thread that has set CONDEMNED on this ill. * and cause ipsq_enter to return failure. */ ASSERT(success); ipsq = ill->ill_phyint->phyint_ipsq; /* * Mark it condemned. No new reference will be made to this ill. * Lookup functions will return an error. Threads that try to * increment the refcnt must check for ILL_CAN_LOOKUP. This ensures * that the refcnt will drop down to zero. */ mutex_enter(&ill->ill_lock); ill->ill_state_flags |= ILL_CONDEMNED; for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { ipif->ipif_state_flags |= IPIF_CONDEMNED; } /* * Wake up anybody waiting to enter the ipsq. ipsq_enter * returns error if ILL_CONDEMNED is set */ cv_broadcast(&ill->ill_cv); mutex_exit(&ill->ill_lock); /* * Shut down fragmentation reassembly. * ill_frag_timer won't start a timer again. * Now cancel any existing timer */ (void) untimeout(ill->ill_frag_timer_id); (void) ill_frag_timeout(ill, 0); /* * If MOVE was in progress, clear the * move_in_progress fields also. */ if (ill->ill_move_in_progress) { ILL_CLEAR_MOVE(ill); } /* * Call ill_delete to bring down the ipifs, ilms and ill on * this ill. Then wait for the refcnts to drop to zero. * ill_is_quiescent checks whether the ill is really quiescent. * Then make sure that threads that are waiting to enter the * ipsq have seen the error returned by ipsq_enter and have * gone away. Then we call ill_delete_tail which does the * DL_UNBIND and DL_DETACH with the driver and then qprocsoff. */ ill_delete(ill); mutex_enter(&ill->ill_lock); while (!ill_is_quiescent(ill)) cv_wait(&ill->ill_cv, &ill->ill_lock); while (ill->ill_waiters) cv_wait(&ill->ill_cv, &ill->ill_lock); mutex_exit(&ill->ill_lock); /* qprocsoff is called in ill_delete_tail */ ill_delete_tail(ill); /* * Walk through all upper (conn) streams and qenable * those that have queued data. * close synchronization needs this to * be done to ensure that all upper layers blocked * due to flow control to the closing device * get unblocked. */ ip1dbg(("ip_wsrv: walking\n")); conn_walk_drain(); mutex_enter(&ip_mi_lock); mi_close_unlink(&ip_g_head, (IDP)ill); mutex_exit(&ip_mi_lock); /* * credp could be null if the open didn't succeed and ip_modopen * itself calls ip_close. */ if (ill->ill_credp != NULL) crfree(ill->ill_credp); /* * Unhook the nic event message from the ill and enqueue it into the nic * event taskq. */ if ((info = ill->ill_nic_event_info) != NULL) { if (ddi_taskq_dispatch(eventq_queue_nic, ip_ne_queue_func, (void *)info, DDI_SLEEP) == DDI_FAILURE) { ip2dbg(("ip_ioctl_finish:ddi_taskq_dispatch failed\n")); if (info->hne_data != NULL) kmem_free(info->hne_data, info->hne_datalen); kmem_free(info, sizeof (hook_nic_event_t)); } ill->ill_nic_event_info = NULL; } mi_close_free((IDP)ill); q->q_ptr = WR(q)->q_ptr = NULL; ipsq_exit(ipsq, B_TRUE, B_TRUE); return (0); } /* * This is called as part of close() for both IP and UDP * in order to quiesce the conn. */ void ip_quiesce_conn(conn_t *connp) { boolean_t drain_cleanup_reqd = B_FALSE; boolean_t conn_ioctl_cleanup_reqd = B_FALSE; boolean_t ilg_cleanup_reqd = B_FALSE; ASSERT(!IPCL_IS_TCP(connp)); /* * Mark the conn as closing, and this conn must not be * inserted in future into any list. Eg. conn_drain_insert(), * won't insert this conn into the conn_drain_list. * Similarly ill_pending_mp_add() will not add any mp to * the pending mp list, after this conn has started closing. * * conn_idl, conn_pending_ill, conn_down_pending_ill, conn_ilg * cannot get set henceforth. */ mutex_enter(&connp->conn_lock); ASSERT(!(connp->conn_state_flags & CONN_QUIESCED)); connp->conn_state_flags |= CONN_CLOSING; if (connp->conn_idl != NULL) drain_cleanup_reqd = B_TRUE; if (connp->conn_oper_pending_ill != NULL) conn_ioctl_cleanup_reqd = B_TRUE; if (connp->conn_ilg_inuse != 0) ilg_cleanup_reqd = B_TRUE; mutex_exit(&connp->conn_lock); if (IPCL_IS_UDP(connp)) udp_quiesce_conn(connp); if (conn_ioctl_cleanup_reqd) conn_ioctl_cleanup(connp); if (is_system_labeled() && connp->conn_anon_port) { (void) tsol_mlp_anon(crgetzone(connp->conn_cred), connp->conn_mlp_type, connp->conn_ulp, ntohs(connp->conn_lport), B_FALSE); connp->conn_anon_port = 0; } connp->conn_mlp_type = mlptSingle; /* * Remove this conn from any fanout list it is on. * and then wait for any threads currently operating * on this endpoint to finish */ ipcl_hash_remove(connp); /* * Remove this conn from the drain list, and do * any other cleanup that may be required. * (Only non-tcp streams may have a non-null conn_idl. * TCP streams are never flow controlled, and * conn_idl will be null) */ if (drain_cleanup_reqd) conn_drain_tail(connp, B_TRUE); if (connp->conn_rq == ip_g_mrouter || connp->conn_wq == ip_g_mrouter) (void) ip_mrouter_done(NULL); if (ilg_cleanup_reqd) ilg_delete_all(connp); conn_delete_ire(connp, NULL); /* * Now conn refcnt can increase only thru CONN_INC_REF_LOCKED. * callers from write side can't be there now because close * is in progress. The only other caller is ipcl_walk * which checks for the condemned flag. */ mutex_enter(&connp->conn_lock); connp->conn_state_flags |= CONN_CONDEMNED; while (connp->conn_ref != 1) cv_wait(&connp->conn_cv, &connp->conn_lock); connp->conn_state_flags |= CONN_QUIESCED; mutex_exit(&connp->conn_lock); } /* ARGSUSED */ int ip_close(queue_t *q, int flags) { conn_t *connp; TRACE_1(TR_FAC_IP, TR_IP_CLOSE, "ip_close: q %p", q); /* * Call the appropriate delete routine depending on whether this is * a module or device. */ if (WR(q)->q_next != NULL) { /* This is a module close */ return (ip_modclose((ill_t *)q->q_ptr)); } connp = q->q_ptr; ip_quiesce_conn(connp); qprocsoff(q); /* * Now we are truly single threaded on this stream, and can * delete the things hanging off the connp, and finally the connp. * We removed this connp from the fanout list, it cannot be * accessed thru the fanouts, and we already waited for the * conn_ref to drop to 0. We are already in close, so * there cannot be any other thread from the top. qprocsoff * has completed, and service has completed or won't run in * future. */ ASSERT(connp->conn_ref == 1); /* * A conn which was previously marked as IPCL_UDP cannot * retain the flag because it would have been cleared by * udp_close(). */ ASSERT(!IPCL_IS_UDP(connp)); if (connp->conn_latch != NULL) { IPLATCH_REFRELE(connp->conn_latch); connp->conn_latch = NULL; } if (connp->conn_policy != NULL) { IPPH_REFRELE(connp->conn_policy); connp->conn_policy = NULL; } if (connp->conn_ipsec_opt_mp != NULL) { freemsg(connp->conn_ipsec_opt_mp); connp->conn_ipsec_opt_mp = NULL; } inet_minor_free(ip_minor_arena, connp->conn_dev); connp->conn_ref--; ipcl_conn_destroy(connp); q->q_ptr = WR(q)->q_ptr = NULL; return (0); } int ip_snmpmod_close(queue_t *q) { conn_t *connp = Q_TO_CONN(q); ASSERT(connp->conn_flags & (IPCL_TCPMOD | IPCL_UDPMOD)); qprocsoff(q); if (connp->conn_flags & IPCL_UDPMOD) udp_close_free(connp); if (connp->conn_cred != NULL) { crfree(connp->conn_cred); connp->conn_cred = NULL; } CONN_DEC_REF(connp); q->q_ptr = WR(q)->q_ptr = NULL; return (0); } /* * Write side put procedure for TCP module or UDP module instance. TCP/UDP * as a module is only used for MIB browsers that push TCP/UDP over IP or ARP. * The only supported primitives are T_SVR4_OPTMGMT_REQ and T_OPTMGMT_REQ. * M_FLUSH messages and ioctls are only passed downstream; we don't flush our * queues as we never enqueue messages there and we don't handle any ioctls. * Everything else is freed. */ void ip_snmpmod_wput(queue_t *q, mblk_t *mp) { conn_t *connp = q->q_ptr; pfi_t setfn; pfi_t getfn; ASSERT(connp->conn_flags & (IPCL_TCPMOD | IPCL_UDPMOD)); switch (DB_TYPE(mp)) { case M_PROTO: case M_PCPROTO: if ((MBLKL(mp) >= sizeof (t_scalar_t)) && ((((union T_primitives *)mp->b_rptr)->type == T_SVR4_OPTMGMT_REQ) || (((union T_primitives *)mp->b_rptr)->type == T_OPTMGMT_REQ))) { /* * This is the only TPI primitive supported. Its * handling does not require tcp_t, but it does require * conn_t to check permissions. */ cred_t *cr = DB_CREDDEF(mp, connp->conn_cred); if (connp->conn_flags & IPCL_TCPMOD) { setfn = tcp_snmp_set; getfn = tcp_snmp_get; } else { setfn = udp_snmp_set; getfn = udp_snmp_get; } if (!snmpcom_req(q, mp, setfn, getfn, cr)) { freemsg(mp); return; } } else if ((mp = mi_tpi_err_ack_alloc(mp, TPROTO, ENOTSUP)) != NULL) qreply(q, mp); break; case M_FLUSH: case M_IOCTL: putnext(q, mp); break; default: freemsg(mp); break; } } /* Return the IP checksum for the IP header at "iph". */ uint16_t ip_csum_hdr(ipha_t *ipha) { uint16_t *uph; uint32_t sum; int opt_len; opt_len = (ipha->ipha_version_and_hdr_length & 0xF) - IP_SIMPLE_HDR_LENGTH_IN_WORDS; uph = (uint16_t *)ipha; sum = uph[0] + uph[1] + uph[2] + uph[3] + uph[4] + uph[5] + uph[6] + uph[7] + uph[8] + uph[9]; if (opt_len > 0) { do { sum += uph[10]; sum += uph[11]; uph += 2; } while (--opt_len); } sum = (sum & 0xFFFF) + (sum >> 16); sum = ~(sum + (sum >> 16)) & 0xFFFF; if (sum == 0xffff) sum = 0; return ((uint16_t)sum); } void ip_ddi_destroy(void) { ipv4_hook_destroy(); ipv6_hook_destroy(); ip_net_destroy(); tnet_fini(); tcp_ddi_destroy(); sctp_ddi_destroy(); ipsec_loader_destroy(); ipsec_policy_destroy(); ipsec_kstat_destroy(); nd_free(&ip_g_nd); mutex_destroy(&igmp_timer_lock); mutex_destroy(&mld_timer_lock); mutex_destroy(&igmp_slowtimeout_lock); mutex_destroy(&mld_slowtimeout_lock); mutex_destroy(&ip_mi_lock); mutex_destroy(&rts_clients.connf_lock); ip_ire_fini(); ip6_asp_free(); conn_drain_fini(); ipcl_destroy(); inet_minor_destroy(ip_minor_arena); icmp_kstat_fini(); ip_kstat_fini(); rw_destroy(&ipsec_capab_ills_lock); rw_destroy(&ill_g_usesrc_lock); ip_drop_unregister(&ip_dropper); } void ip_ddi_init(void) { TCP6_MAJ = ddi_name_to_major(TCP6); TCP_MAJ = ddi_name_to_major(TCP); SCTP_MAJ = ddi_name_to_major(SCTP); SCTP6_MAJ = ddi_name_to_major(SCTP6); ip_input_proc = ip_squeue_switch(ip_squeue_enter); /* IP's IPsec code calls the packet dropper */ ip_drop_register(&ip_dropper, "IP IPsec processing"); if (!ip_g_nd) { if (!ip_param_register(lcl_param_arr, A_CNT(lcl_param_arr), lcl_ndp_arr, A_CNT(lcl_ndp_arr))) { nd_free(&ip_g_nd); } } ipsec_loader_init(); ipsec_policy_init(); ipsec_kstat_init(); rw_init(&ip_g_nd_lock, NULL, RW_DEFAULT, NULL); mutex_init(&igmp_timer_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&mld_timer_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&igmp_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&mld_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&ip_mi_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&ip_addr_avail_lock, NULL, MUTEX_DEFAULT, NULL); rw_init(&ill_g_lock, NULL, RW_DEFAULT, NULL); rw_init(&ipsec_capab_ills_lock, NULL, RW_DEFAULT, NULL); rw_init(&ill_g_usesrc_lock, NULL, RW_DEFAULT, NULL); /* * For IP and TCP the minor numbers should start from 2 since we have 4 * initial devices: ip, ip6, tcp, tcp6. */ if ((ip_minor_arena = inet_minor_create("ip_minor_arena", INET_MIN_DEV + 2, KM_SLEEP)) == NULL) { cmn_err(CE_PANIC, "ip_ddi_init: ip_minor_arena creation failed\n"); } ipcl_init(); mutex_init(&rts_clients.connf_lock, NULL, MUTEX_DEFAULT, NULL); ip_ire_init(); ip6_asp_init(); ipif_init(); conn_drain_init(); tcp_ddi_init(); sctp_ddi_init(); ip_poll_normal_ticks = MSEC_TO_TICK_ROUNDUP(ip_poll_normal_ms); if ((ip_kstat = kstat_create("ip", 0, "ipstat", "net", KSTAT_TYPE_NAMED, sizeof (ip_statistics) / sizeof (kstat_named_t), KSTAT_FLAG_VIRTUAL)) != NULL) { ip_kstat->ks_data = &ip_statistics; kstat_install(ip_kstat); } ip_kstat_init(); ip6_kstat_init(); icmp_kstat_init(); ipsec_loader_start(); tnet_init(); ip_net_init(); ipv4_hook_init(); ipv6_hook_init(); } /* * Allocate and initialize a DLPI template of the specified length. (May be * called as writer.) */ mblk_t * ip_dlpi_alloc(size_t len, t_uscalar_t prim) { mblk_t *mp; mp = allocb(len, BPRI_MED); if (!mp) return (NULL); /* * DLPIv2 says that DL_INFO_REQ and DL_TOKEN_REQ (the latter * of which we don't seem to use) are sent with M_PCPROTO, and * that other DLPI are M_PROTO. */ if (prim == DL_INFO_REQ) { mp->b_datap->db_type = M_PCPROTO; } else { mp->b_datap->db_type = M_PROTO; } mp->b_wptr = mp->b_rptr + len; bzero(mp->b_rptr, len); ((dl_unitdata_req_t *)mp->b_rptr)->dl_primitive = prim; return (mp); } const char * dlpi_prim_str(int prim) { switch (prim) { case DL_INFO_REQ: return ("DL_INFO_REQ"); case DL_INFO_ACK: return ("DL_INFO_ACK"); case DL_ATTACH_REQ: return ("DL_ATTACH_REQ"); case DL_DETACH_REQ: return ("DL_DETACH_REQ"); case DL_BIND_REQ: return ("DL_BIND_REQ"); case DL_BIND_ACK: return ("DL_BIND_ACK"); case DL_UNBIND_REQ: return ("DL_UNBIND_REQ"); case DL_OK_ACK: return ("DL_OK_ACK"); case DL_ERROR_ACK: return ("DL_ERROR_ACK"); case DL_ENABMULTI_REQ: return ("DL_ENABMULTI_REQ"); case DL_DISABMULTI_REQ: return ("DL_DISABMULTI_REQ"); case DL_PROMISCON_REQ: return ("DL_PROMISCON_REQ"); case DL_PROMISCOFF_REQ: return ("DL_PROMISCOFF_REQ"); case DL_UNITDATA_REQ: return ("DL_UNITDATA_REQ"); case DL_UNITDATA_IND: return ("DL_UNITDATA_IND"); case DL_UDERROR_IND: return ("DL_UDERROR_IND"); case DL_PHYS_ADDR_REQ: return ("DL_PHYS_ADDR_REQ"); case DL_PHYS_ADDR_ACK: return ("DL_PHYS_ADDR_ACK"); case DL_SET_PHYS_ADDR_REQ: return ("DL_SET_PHYS_ADDR_REQ"); case DL_NOTIFY_REQ: return ("DL_NOTIFY_REQ"); case DL_NOTIFY_ACK: return ("DL_NOTIFY_ACK"); case DL_NOTIFY_IND: return ("DL_NOTIFY_IND"); case DL_CAPABILITY_REQ: return ("DL_CAPABILITY_REQ"); case DL_CAPABILITY_ACK: return ("DL_CAPABILITY_ACK"); case DL_CONTROL_REQ: return ("DL_CONTROL_REQ"); case DL_CONTROL_ACK: return ("DL_CONTROL_ACK"); default: return (""); } } const char * dlpi_err_str(int err) { switch (err) { case DL_ACCESS: return ("DL_ACCESS"); case DL_BADADDR: return ("DL_BADADDR"); case DL_BADCORR: return ("DL_BADCORR"); case DL_BADDATA: return ("DL_BADDATA"); case DL_BADPPA: return ("DL_BADPPA"); case DL_BADPRIM: return ("DL_BADPRIM"); case DL_BADQOSPARAM: return ("DL_BADQOSPARAM"); case DL_BADQOSTYPE: return ("DL_BADQOSTYPE"); case DL_BADSAP: return ("DL_BADSAP"); case DL_BADTOKEN: return ("DL_BADTOKEN"); case DL_BOUND: return ("DL_BOUND"); case DL_INITFAILED: return ("DL_INITFAILED"); case DL_NOADDR: return ("DL_NOADDR"); case DL_NOTINIT: return ("DL_NOTINIT"); case DL_OUTSTATE: return ("DL_OUTSTATE"); case DL_SYSERR: return ("DL_SYSERR"); case DL_UNSUPPORTED: return ("DL_UNSUPPORTED"); case DL_UNDELIVERABLE: return ("DL_UNDELIVERABLE"); case DL_NOTSUPPORTED : return ("DL_NOTSUPPORTED "); case DL_TOOMANY: return ("DL_TOOMANY"); case DL_NOTENAB: return ("DL_NOTENAB"); case DL_BUSY: return ("DL_BUSY"); case DL_NOAUTO: return ("DL_NOAUTO"); case DL_NOXIDAUTO: return ("DL_NOXIDAUTO"); case DL_NOTESTAUTO: return ("DL_NOTESTAUTO"); case DL_XIDAUTO: return ("DL_XIDAUTO"); case DL_TESTAUTO: return ("DL_TESTAUTO"); case DL_PENDING: return ("DL_PENDING"); default: return (""); } } /* * Debug formatting routine. Returns a character string representation of the * addr in buf, of the form xxx.xxx.xxx.xxx. This routine takes the address * in the form of a ipaddr_t and calls ip_dot_saddr with a pointer. * * Once the ndd table-printing interfaces are removed, this can be changed to * standard dotted-decimal form. */ char * ip_dot_addr(ipaddr_t addr, char *buf) { uint8_t *ap = (uint8_t *)&addr; (void) mi_sprintf(buf, "%03d.%03d.%03d.%03d", ap[0] & 0xFF, ap[1] & 0xFF, ap[2] & 0xFF, ap[3] & 0xFF); return (buf); } /* * Write the given MAC address as a printable string in the usual colon- * separated format. */ const char * mac_colon_addr(const uint8_t *addr, size_t alen, char *buf, size_t buflen) { char *bp; if (alen == 0 || buflen < 4) return ("?"); bp = buf; for (;;) { /* * If there are more MAC address bytes available, but we won't * have any room to print them, then add "..." to the string * instead. See below for the 'magic number' explanation. */ if ((alen == 2 && buflen < 6) || (alen > 2 && buflen < 7)) { (void) strcpy(bp, "..."); break; } (void) sprintf(bp, "%02x", *addr++); bp += 2; if (--alen == 0) break; *bp++ = ':'; buflen -= 3; /* * At this point, based on the first 'if' statement above, * either alen == 1 and buflen >= 3, or alen > 1 and * buflen >= 4. The first case leaves room for the final "xx" * number and trailing NUL byte. The second leaves room for at * least "...". Thus the apparently 'magic' numbers chosen for * that statement. */ } return (buf); } /* * Send an ICMP error after patching up the packet appropriately. Returns * non-zero if the appropriate MIB should be bumped; zero otherwise. */ static boolean_t ip_fanout_send_icmp(queue_t *q, mblk_t *mp, uint_t flags, uint_t icmp_type, uint_t icmp_code, boolean_t mctl_present, zoneid_t zoneid) { ipha_t *ipha; mblk_t *first_mp; boolean_t secure; unsigned char db_type; first_mp = mp; if (mctl_present) { mp = mp->b_cont; secure = ipsec_in_is_secure(first_mp); ASSERT(mp != NULL); } else { /* * If this is an ICMP error being reported - which goes * up as M_CTLs, we need to convert them to M_DATA till * we finish checking with global policy because * ipsec_check_global_policy() assumes M_DATA as clear * and M_CTL as secure. */ db_type = DB_TYPE(mp); DB_TYPE(mp) = M_DATA; secure = B_FALSE; } /* * We are generating an icmp error for some inbound packet. * Called from all ip_fanout_(udp, tcp, proto) functions. * Before we generate an error, check with global policy * to see whether this is allowed to enter the system. As * there is no "conn", we are checking with global policy. */ ipha = (ipha_t *)mp->b_rptr; if (secure || ipsec_inbound_v4_policy_present) { first_mp = ipsec_check_global_policy(first_mp, NULL, ipha, NULL, mctl_present); if (first_mp == NULL) return (B_FALSE); } if (!mctl_present) DB_TYPE(mp) = db_type; if (flags & IP_FF_SEND_ICMP) { if (flags & IP_FF_HDR_COMPLETE) { if (ip_hdr_complete(ipha, zoneid)) { freemsg(first_mp); return (B_TRUE); } } if (flags & IP_FF_CKSUM) { /* * Have to correct checksum since * the packet might have been * fragmented and the reassembly code in ip_rput * does not restore the IP checksum. */ ipha->ipha_hdr_checksum = 0; ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); } switch (icmp_type) { case ICMP_DEST_UNREACHABLE: icmp_unreachable(WR(q), first_mp, icmp_code, zoneid); break; default: freemsg(first_mp); break; } } else { freemsg(first_mp); return (B_FALSE); } return (B_TRUE); } /* * Used to send an ICMP error message when a packet is received for * a protocol that is not supported. The mblk passed as argument * is consumed by this function. */ void ip_proto_not_sup(queue_t *q, mblk_t *ipsec_mp, uint_t flags, zoneid_t zoneid) { mblk_t *mp; ipha_t *ipha; ill_t *ill; ipsec_in_t *ii; ii = (ipsec_in_t *)ipsec_mp->b_rptr; ASSERT(ii->ipsec_in_type == IPSEC_IN); mp = ipsec_mp->b_cont; ipsec_mp->b_cont = NULL; ipha = (ipha_t *)mp->b_rptr; if (IPH_HDR_VERSION(ipha) == IP_VERSION) { if (ip_fanout_send_icmp(q, mp, flags, ICMP_DEST_UNREACHABLE, ICMP_PROTOCOL_UNREACHABLE, B_FALSE, zoneid)) { BUMP_MIB(&ip_mib, ipInUnknownProtos); } } else { /* Get ill from index in ipsec_in_t. */ ill = ill_lookup_on_ifindex(ii->ipsec_in_ill_index, B_TRUE, NULL, NULL, NULL, NULL); if (ill != NULL) { if (ip_fanout_send_icmp_v6(q, mp, flags, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER, 0, B_FALSE, zoneid)) { BUMP_MIB(ill->ill_ip6_mib, ipv6InUnknownProtos); } ill_refrele(ill); } else { /* re-link for the freemsg() below. */ ipsec_mp->b_cont = mp; } } /* If ICMP delivered, ipsec_mp will be a singleton (b_cont == NULL). */ freemsg(ipsec_mp); } /* * See if the inbound datagram has had IPsec processing applied to it. */ boolean_t ipsec_in_is_secure(mblk_t *ipsec_mp) { ipsec_in_t *ii; ii = (ipsec_in_t *)ipsec_mp->b_rptr; ASSERT(ii->ipsec_in_type == IPSEC_IN); if (ii->ipsec_in_loopback) { return (ii->ipsec_in_secure); } else { return (ii->ipsec_in_ah_sa != NULL || ii->ipsec_in_esp_sa != NULL || ii->ipsec_in_decaps); } } /* * Handle protocols with which IP is less intimate. There * can be more than one stream bound to a particular * protocol. When this is the case, normally each one gets a copy * of any incoming packets. * * IPSEC NOTE : * * Don't allow a secure packet going up a non-secure connection. * We don't allow this because * * 1) Reply might go out in clear which will be dropped at * the sending side. * 2) If the reply goes out in clear it will give the * adversary enough information for getting the key in * most of the cases. * * Moreover getting a secure packet when we expect clear * implies that SA's were added without checking for * policy on both ends. This should not happen once ISAKMP * is used to negotiate SAs as SAs will be added only after * verifying the policy. * * NOTE : If the packet was tunneled and not multicast we only send * to it the first match. Unlike TCP and UDP fanouts this doesn't fall * back to delivering packets to AF_INET6 raw sockets. * * IPQoS Notes: * Once we have determined the client, invoke IPPF processing. * Policy processing takes place only if the callout_position, IPP_LOCAL_IN, * is enabled. If we get here from icmp_inbound_error_fanout or ip_wput_local * ip_policy will be false. * * Zones notes: * Currently only applications in the global zone can create raw sockets for * protocols other than ICMP. So unlike the broadcast / multicast case of * ip_fanout_udp(), we only send a copy of the packet to streams in the * specified zone. For ICMP, this is handled by the callers of icmp_inbound(). */ static void ip_fanout_proto(queue_t *q, mblk_t *mp, ill_t *ill, ipha_t *ipha, uint_t flags, boolean_t mctl_present, boolean_t ip_policy, ill_t *recv_ill, zoneid_t zoneid) { queue_t *rq; mblk_t *mp1, *first_mp1; uint_t protocol = ipha->ipha_protocol; ipaddr_t dst; boolean_t one_only; mblk_t *first_mp = mp; boolean_t secure; uint32_t ill_index; conn_t *connp, *first_connp, *next_connp; connf_t *connfp; boolean_t shared_addr; if (mctl_present) { mp = first_mp->b_cont; secure = ipsec_in_is_secure(first_mp); ASSERT(mp != NULL); } else { secure = B_FALSE; } dst = ipha->ipha_dst; /* * If the packet was tunneled and not multicast we only send to it * the first match. */ one_only = ((protocol == IPPROTO_ENCAP || protocol == IPPROTO_IPV6) && !CLASSD(dst)); shared_addr = (zoneid == ALL_ZONES); if (shared_addr) { /* * We don't allow multilevel ports for raw IP, so no need to * check for that here. */ zoneid = tsol_packet_to_zoneid(mp); } connfp = &ipcl_proto_fanout[protocol]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; for (connp = connfp->connf_head; connp != NULL; connp = connp->conn_next) { if (IPCL_PROTO_MATCH(connp, protocol, ipha, ill, flags, zoneid) && (!is_system_labeled() || tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp))) break; } if (connp == NULL || connp->conn_upq == NULL) { /* * No one bound to these addresses. Is * there a client that wants all * unclaimed datagrams? */ mutex_exit(&connfp->connf_lock); /* * Check for IPPROTO_ENCAP... */ if (protocol == IPPROTO_ENCAP && ip_g_mrouter) { /* * If an IPsec mblk is here on a multicast * tunnel (using ip_mroute stuff), check policy here, * THEN ship off to ip_mroute_decap(). * * BTW, If I match a configured IP-in-IP * tunnel, this path will not be reached, and * ip_mroute_decap will never be called. */ first_mp = ipsec_check_global_policy(first_mp, connp, ipha, NULL, mctl_present); if (first_mp != NULL) { if (mctl_present) freeb(first_mp); ip_mroute_decap(q, mp); } /* Else we already freed everything! */ } else { /* * Otherwise send an ICMP protocol unreachable. */ if (ip_fanout_send_icmp(q, first_mp, flags, ICMP_DEST_UNREACHABLE, ICMP_PROTOCOL_UNREACHABLE, mctl_present, zoneid)) { BUMP_MIB(&ip_mib, ipInUnknownProtos); } } return; } CONN_INC_REF(connp); first_connp = connp; /* * Only send message to one tunnel driver by immediately * terminating the loop. */ connp = one_only ? NULL : connp->conn_next; for (;;) { while (connp != NULL) { if (IPCL_PROTO_MATCH(connp, protocol, ipha, ill, flags, zoneid) && (!is_system_labeled() || tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp))) break; connp = connp->conn_next; } /* * Copy the packet. */ if (connp == NULL || connp->conn_upq == NULL || (((first_mp1 = dupmsg(first_mp)) == NULL) && ((first_mp1 = ip_copymsg(first_mp)) == NULL))) { /* * No more interested clients or memory * allocation failed */ connp = first_connp; break; } mp1 = mctl_present ? first_mp1->b_cont : first_mp1; CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); rq = connp->conn_rq; if (!canputnext(rq)) { if (flags & IP_FF_RAWIP) { BUMP_MIB(&ip_mib, rawipInOverflows); } else { BUMP_MIB(&icmp_mib, icmpInOverflows); } freemsg(first_mp1); } else { /* * Don't enforce here if we're an actual tunnel - * let "tun" do it instead. */ if (!IPCL_IS_IPTUN(connp) && (CONN_INBOUND_POLICY_PRESENT(connp) || secure)) { first_mp1 = ipsec_check_inbound_policy (first_mp1, connp, ipha, NULL, mctl_present); } if (first_mp1 != NULL) { /* * ip_fanout_proto also gets called from * icmp_inbound_error_fanout, in which case * the msg type is M_CTL. Don't add info * in this case for the time being. In future * when there is a need for knowing the * inbound iface index for ICMP error msgs, * then this can be changed. */ if ((connp->conn_recvif != 0) && (mp->b_datap->db_type != M_CTL)) { /* * the actual data will be * contained in b_cont upon * successful return of the * following call else * original mblk is returned */ ASSERT(recv_ill != NULL); mp1 = ip_add_info(mp1, recv_ill, IPF_RECVIF); } BUMP_MIB(&ip_mib, ipInDelivers); if (mctl_present) freeb(first_mp1); putnext(rq, mp1); } } mutex_enter(&connfp->connf_lock); /* Follow the next pointer before releasing the conn. */ next_connp = connp->conn_next; CONN_DEC_REF(connp); connp = next_connp; } /* Last one. Send it upstream. */ mutex_exit(&connfp->connf_lock); /* * If this packet is coming from icmp_inbound_error_fanout ip_policy * will be set to false. */ if (IPP_ENABLED(IPP_LOCAL_IN) && ip_policy) { ill_index = ill->ill_phyint->phyint_ifindex; ip_process(IPP_LOCAL_IN, &mp, ill_index); if (mp == NULL) { CONN_DEC_REF(connp); if (mctl_present) { freeb(first_mp); } return; } } rq = connp->conn_rq; if (!canputnext(rq)) { if (flags & IP_FF_RAWIP) { BUMP_MIB(&ip_mib, rawipInOverflows); } else { BUMP_MIB(&icmp_mib, icmpInOverflows); } freemsg(first_mp); } else { if (IPCL_IS_IPTUN(connp)) { /* * Tunneled packet. We enforce policy in the tunnel * module itself. * * Send the WHOLE packet up (incl. IPSEC_IN) without * a policy check. */ putnext(rq, first_mp); CONN_DEC_REF(connp); return; } if ((CONN_INBOUND_POLICY_PRESENT(connp) || secure)) { first_mp = ipsec_check_inbound_policy(first_mp, connp, ipha, NULL, mctl_present); } if (first_mp != NULL) { /* * ip_fanout_proto also gets called * from icmp_inbound_error_fanout, in * which case the msg type is M_CTL. * Don't add info in this case for time * being. In future when there is a * need for knowing the inbound iface * index for ICMP error msgs, then this * can be changed */ if ((connp->conn_recvif != 0) && (mp->b_datap->db_type != M_CTL)) { /* * the actual data will be contained in * b_cont upon successful return * of the following call else original * mblk is returned */ ASSERT(recv_ill != NULL); mp = ip_add_info(mp, recv_ill, IPF_RECVIF); } BUMP_MIB(&ip_mib, ipInDelivers); putnext(rq, mp); if (mctl_present) freeb(first_mp); } } CONN_DEC_REF(connp); } /* * Fanout for TCP packets * The caller puts in the ports parameter. * * IPQoS Notes * Before sending it to the client, invoke IPPF processing. * Policy processing takes place only if the callout_position, IPP_LOCAL_IN, * is enabled. If we get here from icmp_inbound_error_fanout or ip_wput_local * ip_policy is false. */ static void ip_fanout_tcp(queue_t *q, mblk_t *mp, ill_t *recv_ill, ipha_t *ipha, uint_t flags, boolean_t mctl_present, boolean_t ip_policy, zoneid_t zoneid) { mblk_t *first_mp; boolean_t secure; uint32_t ill_index; int ip_hdr_len; tcph_t *tcph; boolean_t syn_present = B_FALSE; conn_t *connp; first_mp = mp; if (mctl_present) { ASSERT(first_mp->b_datap->db_type == M_CTL); mp = first_mp->b_cont; secure = ipsec_in_is_secure(first_mp); ASSERT(mp != NULL); } else { secure = B_FALSE; } ip_hdr_len = IPH_HDR_LENGTH(mp->b_rptr); if ((connp = ipcl_classify_v4(mp, IPPROTO_TCP, ip_hdr_len, zoneid)) == NULL) { /* * No connected connection or listener. Send a * TH_RST via tcp_xmit_listeners_reset. */ /* Initiate IPPf processing, if needed. */ if (IPP_ENABLED(IPP_LOCAL_IN)) { uint32_t ill_index; ill_index = recv_ill->ill_phyint->phyint_ifindex; ip_process(IPP_LOCAL_IN, &first_mp, ill_index); if (first_mp == NULL) return; } BUMP_MIB(&ip_mib, ipInDelivers); ip2dbg(("ip_fanout_tcp: no listener; send reset to zone %d\n", zoneid)); tcp_xmit_listeners_reset(first_mp, ip_hdr_len, zoneid); return; } /* * Allocate the SYN for the TCP connection here itself */ tcph = (tcph_t *)&mp->b_rptr[ip_hdr_len]; if ((tcph->th_flags[0] & (TH_SYN|TH_ACK|TH_RST|TH_URG)) == TH_SYN) { if (IPCL_IS_TCP(connp)) { squeue_t *sqp; /* * For fused tcp loopback, assign the eager's * squeue to be that of the active connect's. * Note that we don't check for IP_FF_LOOPBACK * here since this routine gets called only * for loopback (unlike the IPv6 counterpart). */ ASSERT(Q_TO_CONN(q) != NULL); if (do_tcp_fusion && !CONN_INBOUND_POLICY_PRESENT(connp) && !secure && !IPP_ENABLED(IPP_LOCAL_IN) && !ip_policy && IPCL_IS_TCP(Q_TO_CONN(q))) { ASSERT(Q_TO_CONN(q)->conn_sqp != NULL); sqp = Q_TO_CONN(q)->conn_sqp; } else { sqp = IP_SQUEUE_GET(lbolt); } mp->b_datap->db_struioflag |= STRUIO_EAGER; DB_CKSUMSTART(mp) = (intptr_t)sqp; syn_present = B_TRUE; } } if (IPCL_IS_TCP(connp) && IPCL_IS_BOUND(connp) && !syn_present) { uint_t flags = (unsigned int)tcph->th_flags[0] & 0xFF; if ((flags & TH_RST) || (flags & TH_URG)) { CONN_DEC_REF(connp); freemsg(first_mp); return; } if (flags & TH_ACK) { tcp_xmit_listeners_reset(first_mp, ip_hdr_len, zoneid); CONN_DEC_REF(connp); return; } CONN_DEC_REF(connp); freemsg(first_mp); return; } if (CONN_INBOUND_POLICY_PRESENT(connp) || secure) { first_mp = ipsec_check_inbound_policy(first_mp, connp, ipha, NULL, mctl_present); if (first_mp == NULL) { CONN_DEC_REF(connp); return; } if (IPCL_IS_TCP(connp) && IPCL_IS_BOUND(connp)) { ASSERT(syn_present); if (mctl_present) { ASSERT(first_mp != mp); first_mp->b_datap->db_struioflag |= STRUIO_POLICY; } else { ASSERT(first_mp == mp); mp->b_datap->db_struioflag &= ~STRUIO_EAGER; mp->b_datap->db_struioflag |= STRUIO_POLICY; } } else { /* * Discard first_mp early since we're dealing with a * fully-connected conn_t and tcp doesn't do policy in * this case. */ if (mctl_present) { freeb(first_mp); mctl_present = B_FALSE; } first_mp = mp; } } /* * Initiate policy processing here if needed. If we get here from * icmp_inbound_error_fanout, ip_policy is false. */ if (IPP_ENABLED(IPP_LOCAL_IN) && ip_policy) { ill_index = recv_ill->ill_phyint->phyint_ifindex; ip_process(IPP_LOCAL_IN, &mp, ill_index); if (mp == NULL) { CONN_DEC_REF(connp); if (mctl_present) freeb(first_mp); return; } else if (mctl_present) { ASSERT(first_mp != mp); first_mp->b_cont = mp; } else { first_mp = mp; } } /* Handle IPv6 socket options. */ if (!syn_present && connp->conn_ipv6_recvpktinfo && (flags & IP_FF_IP6INFO)) { /* Add header */ ASSERT(recv_ill != NULL); mp = ip_add_info(mp, recv_ill, IPF_RECVIF); if (mp == NULL) { CONN_DEC_REF(connp); if (mctl_present) freeb(first_mp); return; } else if (mctl_present) { /* * ip_add_info might return a new mp. */ ASSERT(first_mp != mp); first_mp->b_cont = mp; } else { first_mp = mp; } } BUMP_MIB(&ip_mib, ipInDelivers); if (IPCL_IS_TCP(connp)) { (*ip_input_proc)(connp->conn_sqp, first_mp, connp->conn_recv, connp, SQTAG_IP_FANOUT_TCP); } else { putnext(connp->conn_rq, first_mp); CONN_DEC_REF(connp); } } /* * Deliver a udp packet to the given conn, possibly applying ipsec policy. * We are responsible for disposing of mp, such as by freemsg() or putnext() * Caller is responsible for dropping references to the conn, and freeing * first_mp. * * IPQoS Notes * Before sending it to the client, invoke IPPF processing. Policy processing * takes place only if the callout_position, IPP_LOCAL_IN, is enabled and * ip_policy is true. If we get here from icmp_inbound_error_fanout or * ip_wput_local, ip_policy is false. */ static void ip_fanout_udp_conn(conn_t *connp, mblk_t *first_mp, mblk_t *mp, boolean_t secure, ipha_t *ipha, uint_t flags, ill_t *recv_ill, boolean_t ip_policy) { boolean_t mctl_present = (first_mp != NULL); uint32_t in_flags = 0; /* set to IP_RECVSLLA and/or IP_RECVIF */ uint32_t ill_index; if (mctl_present) first_mp->b_cont = mp; else first_mp = mp; if (CONN_UDP_FLOWCTLD(connp)) { BUMP_MIB(&ip_mib, udpInOverflows); freemsg(first_mp); return; } if (CONN_INBOUND_POLICY_PRESENT(connp) || secure) { first_mp = ipsec_check_inbound_policy(first_mp, connp, ipha, NULL, mctl_present); if (first_mp == NULL) return; /* Freed by ipsec_check_inbound_policy(). */ } if (mctl_present) freeb(first_mp); if (connp->conn_recvif) in_flags = IPF_RECVIF; if (connp->conn_recvslla && !(flags & IP_FF_SEND_SLLA)) in_flags |= IPF_RECVSLLA; /* Handle IPv6 options. */ if (connp->conn_ipv6_recvpktinfo && (flags & IP_FF_IP6INFO)) in_flags |= IPF_RECVIF; /* * Initiate IPPF processing here, if needed. Note first_mp won't be * freed if the packet is dropped. The caller will do so. */ if (IPP_ENABLED(IPP_LOCAL_IN) && ip_policy) { ill_index = recv_ill->ill_phyint->phyint_ifindex; ip_process(IPP_LOCAL_IN, &mp, ill_index); if (mp == NULL) { return; } } if ((in_flags != 0) && (mp->b_datap->db_type != M_CTL)) { /* * The actual data will be contained in b_cont * upon successful return of the following call * else original mblk is returned */ ASSERT(recv_ill != NULL); mp = ip_add_info(mp, recv_ill, in_flags); } BUMP_MIB(&ip_mib, ipInDelivers); /* Send it upstream */ CONN_UDP_RECV(connp, mp); } /* * Fanout for UDP packets. * The caller puts in the ports parameter. * * If SO_REUSEADDR is set all multicast and broadcast packets * will be delivered to all streams bound to the same port. * * Zones notes: * Multicast and broadcast packets will be distributed to streams in all zones. * In the special case where an AF_INET socket binds to 0.0.0.0/ and an * AF_INET6 socket binds to ::/, only the AF_INET socket receives the IPv4 * packets. To maintain this behavior with multiple zones, the conns are grouped * by zone and the SO_REUSEADDR flag is checked for the first matching conn in * each zone. If unset, all the following conns in the same zone are skipped. */ static void ip_fanout_udp(queue_t *q, mblk_t *mp, ill_t *ill, ipha_t *ipha, uint32_t ports, boolean_t broadcast, uint_t flags, boolean_t mctl_present, boolean_t ip_policy, ill_t *recv_ill, zoneid_t zoneid) { uint32_t dstport, srcport; ipaddr_t dst; mblk_t *first_mp; boolean_t secure; in6_addr_t v6src; conn_t *connp; connf_t *connfp; conn_t *first_connp; conn_t *next_connp; mblk_t *mp1, *first_mp1; ipaddr_t src; zoneid_t last_zoneid; boolean_t reuseaddr; boolean_t shared_addr; first_mp = mp; if (mctl_present) { mp = first_mp->b_cont; first_mp->b_cont = NULL; secure = ipsec_in_is_secure(first_mp); ASSERT(mp != NULL); } else { first_mp = NULL; secure = B_FALSE; } /* Extract ports in net byte order */ dstport = htons(ntohl(ports) & 0xFFFF); srcport = htons(ntohl(ports) >> 16); dst = ipha->ipha_dst; src = ipha->ipha_src; shared_addr = (zoneid == ALL_ZONES); if (shared_addr) { zoneid = tsol_mlp_findzone(IPPROTO_UDP, dstport); if (zoneid == ALL_ZONES) zoneid = tsol_packet_to_zoneid(mp); } connfp = &ipcl_udp_fanout[IPCL_UDP_HASH(dstport)]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; if (!broadcast && !CLASSD(dst)) { /* * Not broadcast or multicast. Send to the one (first) * client we find. No need to check conn_wantpacket() * since IP_BOUND_IF/conn_incoming_ill does not apply to * IPv4 unicast packets. */ while ((connp != NULL) && (!IPCL_UDP_MATCH(connp, dstport, dst, srcport, src) || !IPCL_ZONE_MATCH(connp, zoneid))) { connp = connp->conn_next; } if (connp == NULL || connp->conn_upq == NULL) goto notfound; if (is_system_labeled() && !tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp)) goto notfound; CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); ip_fanout_udp_conn(connp, first_mp, mp, secure, ipha, flags, recv_ill, ip_policy); IP_STAT(ip_udp_fannorm); CONN_DEC_REF(connp); return; } /* * Broadcast and multicast case * * Need to check conn_wantpacket(). * If SO_REUSEADDR has been set on the first we send the * packet to all clients that have joined the group and * match the port. */ while (connp != NULL) { if ((IPCL_UDP_MATCH(connp, dstport, dst, srcport, src)) && conn_wantpacket(connp, ill, ipha, flags, zoneid) && (!is_system_labeled() || tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp))) break; connp = connp->conn_next; } if (connp == NULL || connp->conn_upq == NULL) goto notfound; first_connp = connp; /* * When SO_REUSEADDR is not set, send the packet only to the first * matching connection in its zone by keeping track of the zoneid. */ reuseaddr = first_connp->conn_reuseaddr; last_zoneid = first_connp->conn_zoneid; CONN_INC_REF(connp); connp = connp->conn_next; for (;;) { while (connp != NULL) { if (IPCL_UDP_MATCH(connp, dstport, dst, srcport, src) && (reuseaddr || connp->conn_zoneid != last_zoneid) && conn_wantpacket(connp, ill, ipha, flags, zoneid) && (!is_system_labeled() || tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp))) break; connp = connp->conn_next; } /* * Just copy the data part alone. The mctl part is * needed just for verifying policy and it is never * sent up. */ if (connp == NULL || (((mp1 = dupmsg(mp)) == NULL) && ((mp1 = copymsg(mp)) == NULL))) { /* * No more interested clients or memory * allocation failed */ connp = first_connp; break; } if (connp->conn_zoneid != last_zoneid) { /* * Update the zoneid so that the packet isn't sent to * any more conns in the same zone unless SO_REUSEADDR * is set. */ reuseaddr = connp->conn_reuseaddr; last_zoneid = connp->conn_zoneid; } if (first_mp != NULL) { ASSERT(((ipsec_info_t *)first_mp->b_rptr)-> ipsec_info_type == IPSEC_IN); first_mp1 = ipsec_in_tag(first_mp, NULL); if (first_mp1 == NULL) { freemsg(mp1); connp = first_connp; break; } } else { first_mp1 = NULL; } CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); /* * IPQoS notes: We don't send the packet for policy * processing here, will do it for the last one (below). * i.e. we do it per-packet now, but if we do policy * processing per-conn, then we would need to do it * here too. */ ip_fanout_udp_conn(connp, first_mp1, mp1, secure, ipha, flags, recv_ill, B_FALSE); mutex_enter(&connfp->connf_lock); /* Follow the next pointer before releasing the conn. */ next_connp = connp->conn_next; IP_STAT(ip_udp_fanmb); CONN_DEC_REF(connp); connp = next_connp; } /* Last one. Send it upstream. */ mutex_exit(&connfp->connf_lock); ip_fanout_udp_conn(connp, first_mp, mp, secure, ipha, flags, recv_ill, ip_policy); IP_STAT(ip_udp_fanmb); CONN_DEC_REF(connp); return; notfound: mutex_exit(&connfp->connf_lock); IP_STAT(ip_udp_fanothers); /* * IPv6 endpoints bound to unicast or multicast IPv4-mapped addresses * have already been matched above, since they live in the IPv4 * fanout tables. This implies we only need to * check for IPv6 in6addr_any endpoints here. * Thus we compare using ipv6_all_zeros instead of the destination * address, except for the multicast group membership lookup which * uses the IPv4 destination. */ IN6_IPADDR_TO_V4MAPPED(ipha->ipha_src, &v6src); connfp = &ipcl_udp_fanout[IPCL_UDP_HASH(dstport)]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; if (!broadcast && !CLASSD(dst)) { while (connp != NULL) { if (IPCL_UDP_MATCH_V6(connp, dstport, ipv6_all_zeros, srcport, v6src) && IPCL_ZONE_MATCH(connp, zoneid) && conn_wantpacket(connp, ill, ipha, flags, zoneid) && !connp->conn_ipv6_v6only) break; connp = connp->conn_next; } if (connp != NULL && is_system_labeled() && !tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp)) connp = NULL; if (connp == NULL || connp->conn_upq == NULL) { /* * No one bound to this port. Is * there a client that wants all * unclaimed datagrams? */ mutex_exit(&connfp->connf_lock); if (mctl_present) first_mp->b_cont = mp; else first_mp = mp; if (ipcl_proto_search(IPPROTO_UDP) != NULL) { ip_fanout_proto(q, first_mp, ill, ipha, flags | IP_FF_RAWIP, mctl_present, ip_policy, recv_ill, zoneid); } else { if (ip_fanout_send_icmp(q, first_mp, flags, ICMP_DEST_UNREACHABLE, ICMP_PORT_UNREACHABLE, mctl_present, zoneid)) { BUMP_MIB(&ip_mib, udpNoPorts); } } return; } CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); ip_fanout_udp_conn(connp, first_mp, mp, secure, ipha, flags, recv_ill, ip_policy); CONN_DEC_REF(connp); return; } /* * IPv4 multicast packet being delivered to an AF_INET6 * in6addr_any endpoint. * Need to check conn_wantpacket(). Note that we use conn_wantpacket() * and not conn_wantpacket_v6() since any multicast membership is * for an IPv4-mapped multicast address. * The packet is sent to all clients in all zones that have joined the * group and match the port. */ while (connp != NULL) { if (IPCL_UDP_MATCH_V6(connp, dstport, ipv6_all_zeros, srcport, v6src) && conn_wantpacket(connp, ill, ipha, flags, zoneid) && (!is_system_labeled() || tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp))) break; connp = connp->conn_next; } if (connp == NULL || connp->conn_upq == NULL) { /* * No one bound to this port. Is * there a client that wants all * unclaimed datagrams? */ mutex_exit(&connfp->connf_lock); if (mctl_present) first_mp->b_cont = mp; else first_mp = mp; if (ipcl_proto_search(IPPROTO_UDP) != NULL) { ip_fanout_proto(q, first_mp, ill, ipha, flags | IP_FF_RAWIP, mctl_present, ip_policy, recv_ill, zoneid); } else { /* * We used to attempt to send an icmp error here, but * since this is known to be a multicast packet * and we don't send icmp errors in response to * multicast, just drop the packet and give up sooner. */ BUMP_MIB(&ip_mib, udpNoPorts); freemsg(first_mp); } return; } first_connp = connp; CONN_INC_REF(connp); connp = connp->conn_next; for (;;) { while (connp != NULL) { if (IPCL_UDP_MATCH_V6(connp, dstport, ipv6_all_zeros, srcport, v6src) && conn_wantpacket(connp, ill, ipha, flags, zoneid) && (!is_system_labeled() || tsol_receive_local(mp, &dst, IPV4_VERSION, shared_addr, connp))) break; connp = connp->conn_next; } /* * Just copy the data part alone. The mctl part is * needed just for verifying policy and it is never * sent up. */ if (connp == NULL || (((mp1 = dupmsg(mp)) == NULL) && ((mp1 = copymsg(mp)) == NULL))) { /* * No more intested clients or memory * allocation failed */ connp = first_connp; break; } if (first_mp != NULL) { ASSERT(((ipsec_info_t *)first_mp->b_rptr)-> ipsec_info_type == IPSEC_IN); first_mp1 = ipsec_in_tag(first_mp, NULL); if (first_mp1 == NULL) { freemsg(mp1); connp = first_connp; break; } } else { first_mp1 = NULL; } CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); /* * IPQoS notes: We don't send the packet for policy * processing here, will do it for the last one (below). * i.e. we do it per-packet now, but if we do policy * processing per-conn, then we would need to do it * here too. */ ip_fanout_udp_conn(connp, first_mp1, mp1, secure, ipha, flags, recv_ill, B_FALSE); mutex_enter(&connfp->connf_lock); /* Follow the next pointer before releasing the conn. */ next_connp = connp->conn_next; CONN_DEC_REF(connp); connp = next_connp; } /* Last one. Send it upstream. */ mutex_exit(&connfp->connf_lock); ip_fanout_udp_conn(connp, first_mp, mp, secure, ipha, flags, recv_ill, ip_policy); CONN_DEC_REF(connp); } /* * Complete the ip_wput header so that it * is possible to generate ICMP * errors. */ int ip_hdr_complete(ipha_t *ipha, zoneid_t zoneid) { ire_t *ire; if (ipha->ipha_src == INADDR_ANY) { ire = ire_lookup_local(zoneid); if (ire == NULL) { ip1dbg(("ip_hdr_complete: no source IRE\n")); return (1); } ipha->ipha_src = ire->ire_addr; ire_refrele(ire); } ipha->ipha_ttl = ip_def_ttl; ipha->ipha_hdr_checksum = 0; ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); return (0); } /* * Nobody should be sending * packets up this stream */ static void ip_lrput(queue_t *q, mblk_t *mp) { mblk_t *mp1; switch (mp->b_datap->db_type) { case M_FLUSH: /* Turn around */ if (*mp->b_rptr & FLUSHW) { *mp->b_rptr &= ~FLUSHR; qreply(q, mp); return; } break; } /* Could receive messages that passed through ar_rput */ for (mp1 = mp; mp1; mp1 = mp1->b_cont) mp1->b_prev = mp1->b_next = NULL; freemsg(mp); } /* Nobody should be sending packets down this stream */ /* ARGSUSED */ void ip_lwput(queue_t *q, mblk_t *mp) { freemsg(mp); } /* * Move the first hop in any source route to ipha_dst and remove that part of * the source route. Called by other protocols. Errors in option formatting * are ignored - will be handled by ip_wput_options Return the final * destination (either ipha_dst or the last entry in a source route.) */ ipaddr_t ip_massage_options(ipha_t *ipha) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; int i; ire_t *ire; ip2dbg(("ip_massage_options\n")); dst = ipha->ipha_dst; for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { opt = opts.ipoptp_cur; switch (optval) { uint8_t off; case IPOPT_SSRR: case IPOPT_LSRR: if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(("ip_massage_options: bad src route\n")); break; } optlen = opts.ipoptp_len; off = opt[IPOPT_OFFSET]; off--; redo_srr: if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* End of source route */ ip1dbg(("ip_massage_options: end of SR\n")); break; } bcopy((char *)opt + off, &dst, IP_ADDR_LEN); ip1dbg(("ip_massage_options: next hop 0x%x\n", ntohl(dst))); /* * Check if our address is present more than * once as consecutive hops in source route. * XXX verify per-interface ip_forwarding * for source route? */ ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (ire != NULL) { ire_refrele(ire); off += IP_ADDR_LEN; goto redo_srr; } if (dst == htonl(INADDR_LOOPBACK)) { ip1dbg(("ip_massage_options: loopback addr in " "source route!\n")); break; } /* * Update ipha_dst to be the first hop and remove the * first hop from the source route (by overwriting * part of the option with NOP options). */ ipha->ipha_dst = dst; /* Put the last entry in dst */ off = ((optlen - IP_ADDR_LEN - 3) & ~(IP_ADDR_LEN-1)) + 3; bcopy(&opt[off], &dst, IP_ADDR_LEN); ip1dbg(("ip_massage_options: last hop 0x%x\n", ntohl(dst))); /* Move down and overwrite */ opt[IP_ADDR_LEN] = opt[0]; opt[IP_ADDR_LEN+1] = opt[IPOPT_OLEN] - IP_ADDR_LEN; opt[IP_ADDR_LEN+2] = opt[IPOPT_OFFSET]; for (i = 0; i < IP_ADDR_LEN; i++) opt[i] = IPOPT_NOP; break; } } return (dst); } /* * This function's job is to forward data to the reverse tunnel (FA->HA) * after doing a few checks. It is assumed that the incoming interface * of the packet is always different than the outgoing interface and the * ire_type of the found ire has to be a non-resolver type. * * IPQoS notes * IP policy is invoked twice for a forwarded packet, once on the read side * and again on the write side if both, IPP_FWD_IN and IPP_FWD_OUT are * enabled. */ static void ip_mrtun_forward(ire_t *ire, ill_t *in_ill, mblk_t *mp) { ipha_t *ipha; queue_t *q; uint32_t pkt_len; #define rptr ((uchar_t *)ipha) uint32_t sum; uint32_t max_frag; mblk_t *first_mp; uint32_t ill_index; ipxmit_state_t pktxmit_state; ill_t *out_ill; ASSERT(ire != NULL); ASSERT(ire->ire_ipif->ipif_net_type == IRE_IF_NORESOLVER); ASSERT(ire->ire_stq != NULL); /* Initiate read side IPPF processing */ if (IPP_ENABLED(IPP_FWD_IN)) { ill_index = in_ill->ill_phyint->phyint_ifindex; ip_process(IPP_FWD_IN, &mp, ill_index); if (mp == NULL) { ip2dbg(("ip_mrtun_forward: inbound pkt " "dropped during IPPF processing\n")); return; } } if (((in_ill->ill_flags & ((ill_t *)ire->ire_stq->q_ptr)->ill_flags & ILLF_ROUTER) == 0) || (in_ill == (ill_t *)ire->ire_stq->q_ptr)) { BUMP_MIB(&ip_mib, ipForwProhibits); ip0dbg(("ip_mrtun_forward: Can't forward :" "forwarding is not turned on\n")); goto drop_pkt; } /* * Don't forward if the interface is down */ if (ire->ire_ipif->ipif_ill->ill_ipif_up_count == 0) { BUMP_MIB(&ip_mib, ipInDiscards); goto drop_pkt; } ipha = (ipha_t *)mp->b_rptr; pkt_len = ntohs(ipha->ipha_length); /* Adjust the checksum to reflect the ttl decrement. */ sum = (int)ipha->ipha_hdr_checksum + IP_HDR_CSUM_TTL_ADJUST; ipha->ipha_hdr_checksum = (uint16_t)(sum + (sum >> 16)); if (ipha->ipha_ttl-- <= 1) { if (ip_csum_hdr(ipha)) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto drop_pkt; } q = ire->ire_stq; if ((first_mp = allocb(sizeof (ipsec_info_t), BPRI_HI)) == NULL) { goto drop_pkt; } ip_ipsec_out_prepend(first_mp, mp, in_ill); /* Sent by forwarding path, and router is global zone */ icmp_time_exceeded(q, first_mp, ICMP_TTL_EXCEEDED, GLOBAL_ZONEID); return; } /* Get the ill_index of the ILL */ ill_index = ire->ire_ipif->ipif_ill->ill_phyint->phyint_ifindex; /* * This location is chosen for the placement of the forwarding hook * because at this point we know that we have a path out for the * packet but haven't yet applied any logic (such as fragmenting) * that happen as part of transmitting the packet out. */ out_ill = ire->ire_ipif->ipif_ill; DTRACE_PROBE4(ip4__forwarding__start, ill_t *, in_ill, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_forwarding_event, ipv4firewall_forwarding, in_ill, out_ill, ipha, mp, mp); DTRACE_PROBE1(ip4__forwarding__end, mblk_t *, mp); if (mp == NULL) return; pkt_len = ntohs(ipha->ipha_length); /* * ip_mrtun_forward is only used by foreign agent to reverse * tunnel the incoming packet. So it does not do any option * processing for source routing. */ max_frag = ire->ire_max_frag; if (pkt_len > max_frag) { /* * It needs fragging on its way out. We haven't * verified the header checksum yet. Since we * are going to put a surely good checksum in the * outgoing header, we have to make sure that it * was good coming in. */ if (ip_csum_hdr(ipha)) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto drop_pkt; } /* Initiate write side IPPF processing */ if (IPP_ENABLED(IPP_FWD_OUT)) { ip_process(IPP_FWD_OUT, &mp, ill_index); if (mp == NULL) { ip2dbg(("ip_mrtun_forward: outbound pkt "\ "dropped/deferred during ip policy "\ "processing\n")); return; } } if ((first_mp = allocb(sizeof (ipsec_info_t), BPRI_HI)) == NULL) { goto drop_pkt; } ip_ipsec_out_prepend(first_mp, mp, in_ill); mp = first_mp; ip_wput_frag(ire, mp, IB_PKT, max_frag, 0, GLOBAL_ZONEID); return; } ip2dbg(("ip_mrtun_forward: ire type (%d)\n", ire->ire_type)); ASSERT(ire->ire_ipif != NULL); DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, out_ill, ipha, mp, mp); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp == NULL) return; /* Now send the packet to the tunnel interface */ mp->b_prev = SET_BPREV_FLAG(IPP_FWD_OUT); q = ire->ire_stq; pktxmit_state = ip_xmit_v4(mp, ire, NULL, B_FALSE); if ((pktxmit_state == SEND_FAILED) || (pktxmit_state == LLHDR_RESLV_FAILED)) { ip2dbg(("ip_mrtun_forward: failed to send packet to ill %p\n", q->q_ptr)); } return; drop_pkt:; ip2dbg(("ip_mrtun_forward: dropping pkt\n")); freemsg(mp); #undef rptr } /* * Fills the ipsec_out_t data structure with appropriate fields and * prepends it to mp which contains the IP hdr + data that was meant * to be forwarded. Please note that ipsec_out_info data structure * is used here to communicate the outgoing ill path at ip_wput() * for the ICMP error packet. This has nothing to do with ipsec IP * security. ipsec_out_t is really used to pass the info to the module * IP where this information cannot be extracted from conn. * This functions is called by ip_mrtun_forward(). */ void ip_ipsec_out_prepend(mblk_t *first_mp, mblk_t *mp, ill_t *xmit_ill) { ipsec_out_t *io; ASSERT(xmit_ill != NULL); first_mp->b_datap->db_type = M_CTL; first_mp->b_wptr += sizeof (ipsec_info_t); /* * This is to pass info to ip_wput in absence of conn. * ipsec_out_secure will be B_FALSE because of this. * Thus ipsec_out_secure being B_FALSE indicates that * this is not IPSEC security related information. */ bzero(first_mp->b_rptr, sizeof (ipsec_info_t)); io = (ipsec_out_t *)first_mp->b_rptr; io->ipsec_out_type = IPSEC_OUT; io->ipsec_out_len = sizeof (ipsec_out_t); first_mp->b_cont = mp; io->ipsec_out_ill_index = xmit_ill->ill_phyint->phyint_ifindex; io->ipsec_out_xmit_if = B_TRUE; } /* * Return the network mask * associated with the specified address. */ ipaddr_t ip_net_mask(ipaddr_t addr) { uchar_t *up = (uchar_t *)&addr; ipaddr_t mask = 0; uchar_t *maskp = (uchar_t *)&mask; #if defined(__i386) || defined(__amd64) #define TOTALLY_BRAIN_DAMAGED_C_COMPILER #endif #ifdef TOTALLY_BRAIN_DAMAGED_C_COMPILER maskp[0] = maskp[1] = maskp[2] = maskp[3] = 0; #endif if (CLASSD(addr)) { maskp[0] = 0xF0; return (mask); } if (addr == 0) return (0); maskp[0] = 0xFF; if ((up[0] & 0x80) == 0) return (mask); maskp[1] = 0xFF; if ((up[0] & 0xC0) == 0x80) return (mask); maskp[2] = 0xFF; if ((up[0] & 0xE0) == 0xC0) return (mask); /* Must be experimental or multicast, indicate as much */ return ((ipaddr_t)0); } /* * Select an ill for the packet by considering load spreading across * a different ill in the group if dst_ill is part of some group. */ ill_t * ip_newroute_get_dst_ill(ill_t *dst_ill) { ill_t *ill; /* * We schedule irrespective of whether the source address is * INADDR_ANY or not. illgrp_scheduler returns a held ill. */ ill = illgrp_scheduler(dst_ill); if (ill == NULL) return (NULL); /* * For groups with names ip_sioctl_groupname ensures that all * ills are of same type. For groups without names, ifgrp_insert * ensures this. */ ASSERT(dst_ill->ill_type == ill->ill_type); return (ill); } /* * Helper function for the IPIF_NOFAILOVER/ATTACH_IF interface attachment case. */ ill_t * ip_grab_attach_ill(ill_t *ill, mblk_t *first_mp, int ifindex, boolean_t isv6) { ill_t *ret_ill; ASSERT(ifindex != 0); ret_ill = ill_lookup_on_ifindex(ifindex, isv6, NULL, NULL, NULL, NULL); if (ret_ill == NULL || (ret_ill->ill_phyint->phyint_flags & PHYI_OFFLINE)) { if (isv6) { if (ill != NULL) { BUMP_MIB(ill->ill_ip6_mib, ipv6OutDiscards); } else { BUMP_MIB(&ip6_mib, ipv6OutDiscards); } ip1dbg(("ip_grab_attach_ill (IPv6): " "bad ifindex %d.\n", ifindex)); } else { BUMP_MIB(&ip_mib, ipOutDiscards); ip1dbg(("ip_grab_attach_ill (IPv4): " "bad ifindex %d.\n", ifindex)); } if (ret_ill != NULL) ill_refrele(ret_ill); freemsg(first_mp); return (NULL); } return (ret_ill); } /* * IPv4 - * ip_newroute is called by ip_rput or ip_wput whenever we need to send * out a packet to a destination address for which we do not have specific * (or sufficient) routing information. * * NOTE : These are the scopes of some of the variables that point at IRE, * which needs to be followed while making any future modifications * to avoid memory leaks. * * - ire and sire are the entries looked up initially by * ire_ftable_lookup. * - ipif_ire is used to hold the interface ire associated with * the new cache ire. But it's scope is limited, so we always REFRELE * it before branching out to error paths. * - save_ire is initialized before ire_create, so that ire returned * by ire_create will not over-write the ire. We REFRELE save_ire * before breaking out of the switch. * * Thus on failures, we have to REFRELE only ire and sire, if they * are not NULL. */ void ip_newroute(queue_t *q, mblk_t *mp, ipaddr_t dst, ill_t *in_ill, conn_t *connp, zoneid_t zoneid) { areq_t *areq; ipaddr_t gw = 0; ire_t *ire = NULL; mblk_t *res_mp; ipaddr_t *addrp; ipaddr_t nexthop_addr; ipif_t *src_ipif = NULL; ill_t *dst_ill = NULL; ipha_t *ipha; ire_t *sire = NULL; mblk_t *first_mp; ire_t *save_ire; ill_t *attach_ill = NULL; /* Bind to IPIF_NOFAILOVER address */ ushort_t ire_marks = 0; boolean_t mctl_present; ipsec_out_t *io; mblk_t *saved_mp; ire_t *first_sire = NULL; mblk_t *copy_mp = NULL; mblk_t *xmit_mp = NULL; ipaddr_t save_dst; uint32_t multirt_flags = MULTIRT_CACHEGW | MULTIRT_USESTAMP | MULTIRT_SETSTAMP; boolean_t multirt_is_resolvable; boolean_t multirt_resolve_next; boolean_t do_attach_ill = B_FALSE; boolean_t ip_nexthop = B_FALSE; tsol_ire_gw_secattr_t *attrp = NULL; tsol_gcgrp_t *gcgrp = NULL; tsol_gcgrp_addr_t ga; if (ip_debug > 2) { /* ip1dbg */ pr_addr_dbg("ip_newroute: dst %s\n", AF_INET, &dst); } EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (mctl_present) { io = (ipsec_out_t *)first_mp->b_rptr; ASSERT(io->ipsec_out_type == IPSEC_OUT); ASSERT(zoneid == io->ipsec_out_zoneid); ASSERT(zoneid != ALL_ZONES); } ipha = (ipha_t *)mp->b_rptr; /* All multicast lookups come through ip_newroute_ipif() */ if (CLASSD(dst)) { ip0dbg(("ip_newroute: CLASSD 0x%x (b_prev %p, b_next %p)\n", ntohl(dst), (void *)mp->b_prev, (void *)mp->b_next)); freemsg(first_mp); return; } if (mctl_present && io->ipsec_out_attach_if) { /* ip_grab_attach_ill returns a held ill */ attach_ill = ip_grab_attach_ill(NULL, first_mp, io->ipsec_out_ill_index, B_FALSE); /* Failure case frees things for us. */ if (attach_ill == NULL) return; /* * Check if we need an ire that will not be * looked up by anybody else i.e. HIDDEN. */ if (ill_is_probeonly(attach_ill)) ire_marks = IRE_MARK_HIDDEN; } if (mctl_present && io->ipsec_out_ip_nexthop) { ip_nexthop = B_TRUE; nexthop_addr = io->ipsec_out_nexthop_addr; } /* * If this IRE is created for forwarding or it is not for * traffic for congestion controlled protocols, mark it as temporary. */ if (mp->b_prev != NULL || !IP_FLOW_CONTROLLED_ULP(ipha->ipha_protocol)) ire_marks |= IRE_MARK_TEMPORARY; /* * Get what we can from ire_ftable_lookup which will follow an IRE * chain until it gets the most specific information available. * For example, we know that there is no IRE_CACHE for this dest, * but there may be an IRE_OFFSUBNET which specifies a gateway. * ire_ftable_lookup will look up the gateway, etc. * Check if in_ill != NULL. If it is true, the packet must be * from an incoming interface where RTA_SRCIFP is set. * Otherwise, given ire_ftable_lookup algorithm, only one among routes * to the destination, of equal netmask length in the forward table, * will be recursively explored. If no information is available * for the final gateway of that route, we force the returned ire * to be equal to sire using MATCH_IRE_PARENT. * At least, in this case we have a starting point (in the buckets) * to look for other routes to the destination in the forward table. * This is actually used only for multirouting, where a list * of routes has to be processed in sequence. * * In the process of coming up with the most specific information, * ire_ftable_lookup may end up with an incomplete IRE_CACHE entry * for the gateway (i.e., one for which the ire_nce->nce_state is * not yet ND_REACHABLE, and is in the middle of arp resolution). * Two caveats when handling incomplete ire's in ip_newroute: * - we should be careful when accessing its ire_nce (specifically * the nce_res_mp) ast it might change underneath our feet, and, * - not all legacy code path callers are prepared to handle * incomplete ire's, so we should not create/add incomplete * ire_cache entries here. (See discussion about temporary solution * further below). * * In order to minimize packet dropping, and to preserve existing * behavior, we treat this case as if there were no IRE_CACHE for the * gateway, and instead use the IF_RESOLVER ire to send out * another request to ARP (this is achieved by passing the * MATCH_IRE_COMPLETE flag to ire_ftable_lookup). When the * arp response comes back in ip_wput_nondata, we will create * a per-dst ire_cache that has an ND_COMPLETE ire. * * Note that this is a temporary solution; the correct solution is * to create an incomplete per-dst ire_cache entry, and send the * packet out when the gw's nce is resolved. In order to achieve this, * all packet processing must have been completed prior to calling * ire_add_then_send. Some legacy code paths (e.g. cgtp) would need * to be modified to accomodate this solution. */ if (in_ill != NULL) { ire = ire_srcif_table_lookup(dst, IRE_IF_RESOLVER, NULL, in_ill, MATCH_IRE_TYPE); } else if (ip_nexthop) { /* * The first time we come here, we look for an IRE_INTERFACE * entry for the specified nexthop, set the dst to be the * nexthop address and create an IRE_CACHE entry for the * nexthop. The next time around, we are able to find an * IRE_CACHE entry for the nexthop, set the gateway to be the * nexthop address and create an IRE_CACHE entry for the * destination address via the specified nexthop. */ ire = ire_cache_lookup(nexthop_addr, zoneid, MBLK_GETLABEL(mp)); if (ire != NULL) { gw = nexthop_addr; ire_marks |= IRE_MARK_PRIVATE_ADDR; } else { ire = ire_ftable_lookup(nexthop_addr, 0, 0, IRE_INTERFACE, NULL, NULL, zoneid, 0, MBLK_GETLABEL(mp), MATCH_IRE_TYPE | MATCH_IRE_SECATTR); if (ire != NULL) { dst = nexthop_addr; } } } else if (attach_ill == NULL) { ire = ire_ftable_lookup(dst, 0, 0, 0, NULL, &sire, zoneid, 0, MBLK_GETLABEL(mp), MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | MATCH_IRE_RJ_BHOLE | MATCH_IRE_PARENT | MATCH_IRE_SECATTR | MATCH_IRE_COMPLETE); } else { /* * attach_ill is set only for communicating with * on-link hosts. So, don't look for DEFAULT. */ ipif_t *attach_ipif; attach_ipif = ipif_get_next_ipif(NULL, attach_ill); if (attach_ipif == NULL) { ill_refrele(attach_ill); goto icmp_err_ret; } ire = ire_ftable_lookup(dst, 0, 0, 0, attach_ipif, &sire, zoneid, 0, MBLK_GETLABEL(mp), MATCH_IRE_RJ_BHOLE | MATCH_IRE_ILL | MATCH_IRE_SECATTR); ipif_refrele(attach_ipif); } ip3dbg(("ip_newroute: ire_ftable_lookup() " "returned ire %p, sire %p\n", (void *)ire, (void *)sire)); /* * This loop is run only once in most cases. * We loop to resolve further routes only when the destination * can be reached through multiple RTF_MULTIRT-flagged ires. */ do { /* Clear the previous iteration's values */ if (src_ipif != NULL) { ipif_refrele(src_ipif); src_ipif = NULL; } if (dst_ill != NULL) { ill_refrele(dst_ill); dst_ill = NULL; } multirt_resolve_next = B_FALSE; /* * We check if packets have to be multirouted. * In this case, given the current couple, * we look for the next suitable . * This check is done in ire_multirt_lookup(), * which applies various criteria to find the next route * to resolve. ire_multirt_lookup() leaves * unchanged if it detects it has not been tried yet. */ if ((sire != NULL) && (sire->ire_flags & RTF_MULTIRT)) { ip3dbg(("ip_newroute: starting next_resolution " "with first_mp %p, tag %d\n", (void *)first_mp, MULTIRT_DEBUG_TAGGED(first_mp))); ASSERT(sire != NULL); multirt_is_resolvable = ire_multirt_lookup(&ire, &sire, multirt_flags, MBLK_GETLABEL(mp)); ip3dbg(("ip_newroute: multirt_is_resolvable %d, " "ire %p, sire %p\n", multirt_is_resolvable, (void *)ire, (void *)sire)); if (!multirt_is_resolvable) { /* * No more multirt route to resolve; give up * (all routes resolved or no more * resolvable routes). */ if (ire != NULL) { ire_refrele(ire); ire = NULL; } } else { ASSERT(sire != NULL); ASSERT(ire != NULL); /* * We simply use first_sire as a flag that * indicates if a resolvable multirt route * has already been found. * If it is not the case, we may have to send * an ICMP error to report that the * destination is unreachable. * We do not IRE_REFHOLD first_sire. */ if (first_sire == NULL) { first_sire = sire; } } } if (ire == NULL) { if (ip_debug > 3) { /* ip2dbg */ pr_addr_dbg("ip_newroute: " "can't resolve %s\n", AF_INET, &dst); } ip3dbg(("ip_newroute: " "ire %p, sire %p, first_sire %p\n", (void *)ire, (void *)sire, (void *)first_sire)); if (sire != NULL) { ire_refrele(sire); sire = NULL; } if (first_sire != NULL) { /* * At least one multirt route has been found * in the same call to ip_newroute(); * there is no need to report an ICMP error. * first_sire was not IRE_REFHOLDed. */ MULTIRT_DEBUG_UNTAG(first_mp); freemsg(first_mp); return; } ip_rts_change(RTM_MISS, dst, 0, 0, 0, 0, 0, 0, RTA_DST); if (attach_ill != NULL) ill_refrele(attach_ill); goto icmp_err_ret; } /* * When RTA_SRCIFP is used to add a route, then an interface * route is added in the source interface's routing table. * If the outgoing interface of this route is of type * IRE_IF_RESOLVER, then upon creation of the ire, * ire_nce->nce_res_mp is set to NULL. * Later, when this route is first used for forwarding * a packet, ip_newroute() is called * to resolve the hardware address of the outgoing ipif. * We do not come here for IRE_IF_NORESOLVER entries in the * source interface based table. We only come here if the * outgoing interface is a resolver interface and we don't * have the ire_nce->nce_res_mp information yet. * If in_ill is not null that means it is called from * ip_rput. */ ASSERT(ire->ire_in_ill == NULL || (ire->ire_type == IRE_IF_RESOLVER && ire->ire_nce != NULL && ire->ire_nce->nce_res_mp == NULL)); /* * Verify that the returned IRE does not have either * the RTF_REJECT or RTF_BLACKHOLE flags set and that the IRE is * either an IRE_CACHE, IRE_IF_NORESOLVER or IRE_IF_RESOLVER. */ if ((ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) || (ire->ire_type & (IRE_CACHE | IRE_INTERFACE)) == 0) { if (attach_ill != NULL) ill_refrele(attach_ill); goto icmp_err_ret; } /* * Increment the ire_ob_pkt_count field for ire if it is an * INTERFACE (IF_RESOLVER or IF_NORESOLVER) IRE type, and * increment the same for the parent IRE, sire, if it is some * sort of prefix IRE (which includes DEFAULT, PREFIX, HOST * and HOST_REDIRECT). */ if ((ire->ire_type & IRE_INTERFACE) != 0) { UPDATE_OB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; } if (sire != NULL) { gw = sire->ire_gateway_addr; ASSERT((sire->ire_type & (IRE_CACHETABLE | IRE_INTERFACE)) == 0); UPDATE_OB_PKT_COUNT(sire); sire->ire_last_used_time = lbolt; } /* * We have a route to reach the destination. * * 1) If the interface is part of ill group, try to get a new * ill taking load spreading into account. * * 2) After selecting the ill, get a source address that * might create good inbound load spreading. * ipif_select_source does this for us. * * If the application specified the ill (ifindex), we still * load spread. Only if the packets needs to go out * specifically on a given ill e.g. binding to * IPIF_NOFAILOVER address, then we don't try to use a * different ill for load spreading. */ if (attach_ill == NULL) { /* * Don't perform outbound load spreading in the * case of an RTF_MULTIRT route, as we actually * typically want to replicate outgoing packets * through particular interfaces. */ if ((sire != NULL) && (sire->ire_flags & RTF_MULTIRT)) { dst_ill = ire->ire_ipif->ipif_ill; /* for uniformity */ ill_refhold(dst_ill); } else { /* * If we are here trying to create an IRE_CACHE * for an offlink destination and have the * IRE_CACHE for the next hop and the latter is * using virtual IP source address selection i.e * it's ire->ire_ipif is pointing to a virtual * network interface (vni) then * ip_newroute_get_dst_ll() will return the vni * interface as the dst_ill. Since the vni is * virtual i.e not associated with any physical * interface, it cannot be the dst_ill, hence * in such a case call ip_newroute_get_dst_ll() * with the stq_ill instead of the ire_ipif ILL. * The function returns a refheld ill. */ if ((ire->ire_type == IRE_CACHE) && IS_VNI(ire->ire_ipif->ipif_ill)) dst_ill = ip_newroute_get_dst_ill( ire->ire_stq->q_ptr); else dst_ill = ip_newroute_get_dst_ill( ire->ire_ipif->ipif_ill); } if (dst_ill == NULL) { if (ip_debug > 2) { pr_addr_dbg("ip_newroute: " "no dst ill for dst" " %s\n", AF_INET, &dst); } goto icmp_err_ret; } } else { dst_ill = ire->ire_ipif->ipif_ill; /* for uniformity */ ill_refhold(dst_ill); /* * We should have found a route matching ill as we * called ire_ftable_lookup with MATCH_IRE_ILL. * Rather than asserting, when there is a mismatch, * we just drop the packet. */ if (dst_ill != attach_ill) { ip0dbg(("ip_newroute: Packet dropped as " "IPIF_NOFAILOVER ill is %s, " "ire->ire_ipif->ipif_ill is %s\n", attach_ill->ill_name, dst_ill->ill_name)); ill_refrele(attach_ill); goto icmp_err_ret; } } /* attach_ill can't go in loop. IPMP and CGTP are disjoint */ if (attach_ill != NULL) { ill_refrele(attach_ill); attach_ill = NULL; do_attach_ill = B_TRUE; } ASSERT(dst_ill != NULL); ip2dbg(("ip_newroute: dst_ill %s\n", dst_ill->ill_name)); /* * Pick the best source address from dst_ill. * * 1) If it is part of a multipathing group, we would * like to spread the inbound packets across different * interfaces. ipif_select_source picks a random source * across the different ills in the group. * * 2) If it is not part of a multipathing group, we try * to pick the source address from the destination * route. Clustering assumes that when we have multiple * prefixes hosted on an interface, the prefix of the * source address matches the prefix of the destination * route. We do this only if the address is not * DEPRECATED. * * 3) If the conn is in a different zone than the ire, we * need to pick a source address from the right zone. * * NOTE : If we hit case (1) above, the prefix of the source * address picked may not match the prefix of the * destination routes prefix as ipif_select_source * does not look at "dst" while picking a source * address. * If we want the same behavior as (2), we will need * to change the behavior of ipif_select_source. */ ASSERT(src_ipif == NULL); if ((sire != NULL) && (sire->ire_flags & RTF_SETSRC)) { /* * The RTF_SETSRC flag is set in the parent ire (sire). * Check that the ipif matching the requested source * address still exists. */ src_ipif = ipif_lookup_addr(sire->ire_src_addr, NULL, zoneid, NULL, NULL, NULL, NULL); } if (src_ipif == NULL) { ire_marks |= IRE_MARK_USESRC_CHECK; if ((dst_ill->ill_group != NULL) || (ire->ire_ipif->ipif_flags & IPIF_DEPRECATED) || (connp != NULL && ire->ire_zoneid != zoneid && ire->ire_zoneid != ALL_ZONES) || (dst_ill->ill_usesrc_ifindex != 0)) { /* * If the destination is reachable via a * given gateway, the selected source address * should be in the same subnet as the gateway. * Otherwise, the destination is not reachable. * * If there are no interfaces on the same subnet * as the destination, ipif_select_source gives * first non-deprecated interface which might be * on a different subnet than the gateway. * This is not desirable. Hence pass the dst_ire * source address to ipif_select_source. * It is sure that the destination is reachable * with the dst_ire source address subnet. * So passing dst_ire source address to * ipif_select_source will make sure that the * selected source will be on the same subnet * as dst_ire source address. */ ipaddr_t saddr = ire->ire_ipif->ipif_src_addr; src_ipif = ipif_select_source(dst_ill, saddr, zoneid); if (src_ipif == NULL) { if (ip_debug > 2) { pr_addr_dbg("ip_newroute: " "no src for dst %s ", AF_INET, &dst); printf("through interface %s\n", dst_ill->ill_name); } goto icmp_err_ret; } } else { src_ipif = ire->ire_ipif; ASSERT(src_ipif != NULL); /* hold src_ipif for uniformity */ ipif_refhold(src_ipif); } } /* * Assign a source address while we have the conn. * We can't have ip_wput_ire pick a source address when the * packet returns from arp since we need to look at * conn_unspec_src and conn_zoneid, and we lose the conn when * going through arp. * * NOTE : ip_newroute_v6 does not have this piece of code as * it uses ip6i to store this information. */ if (ipha->ipha_src == INADDR_ANY && (connp == NULL || !connp->conn_unspec_src)) { ipha->ipha_src = src_ipif->ipif_src_addr; } if (ip_debug > 3) { /* ip2dbg */ pr_addr_dbg("ip_newroute: first hop %s\n", AF_INET, &gw); } ip2dbg(("\tire type %s (%d)\n", ip_nv_lookup(ire_nv_tbl, ire->ire_type), ire->ire_type)); /* * The TTL of multirouted packets is bounded by the * ip_multirt_ttl ndd variable. */ if ((sire != NULL) && (sire->ire_flags & RTF_MULTIRT)) { /* Force TTL of multirouted packets */ if ((ip_multirt_ttl > 0) && (ipha->ipha_ttl > ip_multirt_ttl)) { ip2dbg(("ip_newroute: forcing multirt TTL " "to %d (was %d), dst 0x%08x\n", ip_multirt_ttl, ipha->ipha_ttl, ntohl(sire->ire_addr))); ipha->ipha_ttl = ip_multirt_ttl; } } /* * At this point in ip_newroute(), ire is either the * IRE_CACHE of the next-hop gateway for an off-subnet * destination or an IRE_INTERFACE type that should be used * to resolve an on-subnet destination or an on-subnet * next-hop gateway. * * In the IRE_CACHE case, we have the following : * * 1) src_ipif - used for getting a source address. * * 2) dst_ill - from which we derive ire_stq/ire_rfq. This * means packets using this IRE_CACHE will go out on * dst_ill. * * 3) The IRE sire will point to the prefix that is the * longest matching route for the destination. These * prefix types include IRE_DEFAULT, IRE_PREFIX, IRE_HOST. * * The newly created IRE_CACHE entry for the off-subnet * destination is tied to both the prefix route and the * interface route used to resolve the next-hop gateway * via the ire_phandle and ire_ihandle fields, * respectively. * * In the IRE_INTERFACE case, we have the following : * * 1) src_ipif - used for getting a source address. * * 2) dst_ill - from which we derive ire_stq/ire_rfq. This * means packets using the IRE_CACHE that we will build * here will go out on dst_ill. * * 3) sire may or may not be NULL. But, the IRE_CACHE that is * to be created will only be tied to the IRE_INTERFACE * that was derived from the ire_ihandle field. * * If sire is non-NULL, it means the destination is * off-link and we will first create the IRE_CACHE for the * gateway. Next time through ip_newroute, we will create * the IRE_CACHE for the final destination as described * above. * * In both cases, after the current resolution has been * completed (or possibly initialised, in the IRE_INTERFACE * case), the loop may be re-entered to attempt the resolution * of another RTF_MULTIRT route. * * When an IRE_CACHE entry for the off-subnet destination is * created, RTF_SETSRC and RTF_MULTIRT are inherited from sire, * for further processing in emission loops. */ save_ire = ire; switch (ire->ire_type) { case IRE_CACHE: { ire_t *ipif_ire; mblk_t *ire_fp_mp; ASSERT(save_ire->ire_nce->nce_state == ND_REACHABLE); if (gw == 0) gw = ire->ire_gateway_addr; /* * We need 3 ire's to create a new cache ire for an * off-link destination from the cache ire of the * gateway. * * 1. The prefix ire 'sire' (Note that this does * not apply to the conn_nexthop_set case) * 2. The cache ire of the gateway 'ire' * 3. The interface ire 'ipif_ire' * * We have (1) and (2). We lookup (3) below. * * If there is no interface route to the gateway, * it is a race condition, where we found the cache * but the interface route has been deleted. */ if (ip_nexthop) { ipif_ire = ire_ihandle_lookup_onlink(ire); } else { ipif_ire = ire_ihandle_lookup_offlink(ire, sire); } if (ipif_ire == NULL) { ip1dbg(("ip_newroute: " "ire_ihandle_lookup_offlink failed\n")); goto icmp_err_ret; } /* * XXX We are using the same res_mp * (DL_UNITDATA_REQ) though the save_ire is not * pointing at the same ill. * This is incorrect. We need to send it up to the * resolver to get the right res_mp. For ethernets * this may be okay (ill_type == DL_ETHER). */ res_mp = save_ire->ire_nce->nce_res_mp; ire_fp_mp = NULL; /* * save_ire's nce_fp_mp can't change since it is * not an IRE_MIPRTUN or IRE_BROADCAST * LOCK_IRE_FP_MP does not do any useful work in * the case of IRE_CACHE. So we don't use it below. */ if (save_ire->ire_stq == dst_ill->ill_wq) ire_fp_mp = save_ire->ire_nce->nce_fp_mp; /* * Check cached gateway IRE for any security * attributes; if found, associate the gateway * credentials group to the destination IRE. */ if ((attrp = save_ire->ire_gw_secattr) != NULL) { mutex_enter(&attrp->igsa_lock); if ((gcgrp = attrp->igsa_gcgrp) != NULL) GCGRP_REFHOLD(gcgrp); mutex_exit(&attrp->igsa_lock); } ire = ire_create( (uchar_t *)&dst, /* dest address */ (uchar_t *)&ip_g_all_ones, /* mask */ (uchar_t *)&src_ipif->ipif_src_addr, /* src addr */ (uchar_t *)&gw, /* gateway address */ NULL, &save_ire->ire_max_frag, ire_fp_mp, /* Fast Path header */ dst_ill->ill_rq, /* recv-from queue */ dst_ill->ill_wq, /* send-to queue */ IRE_CACHE, /* IRE type */ res_mp, src_ipif, in_ill, /* incoming ill */ (sire != NULL) ? sire->ire_mask : 0, /* Parent mask */ (sire != NULL) ? sire->ire_phandle : 0, /* Parent handle */ ipif_ire->ire_ihandle, /* Interface handle */ (sire != NULL) ? (sire->ire_flags & (RTF_SETSRC | RTF_MULTIRT)) : 0, /* flags */ (sire != NULL) ? &(sire->ire_uinfo) : &(save_ire->ire_uinfo), NULL, gcgrp); if (ire == NULL) { if (gcgrp != NULL) { GCGRP_REFRELE(gcgrp); gcgrp = NULL; } ire_refrele(ipif_ire); ire_refrele(save_ire); break; } /* reference now held by IRE */ gcgrp = NULL; ire->ire_marks |= ire_marks; /* * Prevent sire and ipif_ire from getting deleted. * The newly created ire is tied to both of them via * the phandle and ihandle respectively. */ if (sire != NULL) { IRB_REFHOLD(sire->ire_bucket); /* Has it been removed already ? */ if (sire->ire_marks & IRE_MARK_CONDEMNED) { IRB_REFRELE(sire->ire_bucket); ire_refrele(ipif_ire); ire_refrele(save_ire); break; } } IRB_REFHOLD(ipif_ire->ire_bucket); /* Has it been removed already ? */ if (ipif_ire->ire_marks & IRE_MARK_CONDEMNED) { IRB_REFRELE(ipif_ire->ire_bucket); if (sire != NULL) IRB_REFRELE(sire->ire_bucket); ire_refrele(ipif_ire); ire_refrele(save_ire); break; } xmit_mp = first_mp; /* * In the case of multirouting, a copy * of the packet is done before its sending. * The copy is used to attempt another * route resolution, in a next loop. */ if (ire->ire_flags & RTF_MULTIRT) { copy_mp = copymsg(first_mp); if (copy_mp != NULL) { xmit_mp = copy_mp; MULTIRT_DEBUG_TAG(first_mp); } } ire_add_then_send(q, ire, xmit_mp); ire_refrele(save_ire); /* Assert that sire is not deleted yet. */ if (sire != NULL) { ASSERT(sire->ire_ptpn != NULL); IRB_REFRELE(sire->ire_bucket); } /* Assert that ipif_ire is not deleted yet. */ ASSERT(ipif_ire->ire_ptpn != NULL); IRB_REFRELE(ipif_ire->ire_bucket); ire_refrele(ipif_ire); /* * If copy_mp is not NULL, multirouting was * requested. We loop to initiate a next * route resolution attempt, starting from sire. */ if (copy_mp != NULL) { /* * Search for the next unresolved * multirt route. */ copy_mp = NULL; ipif_ire = NULL; ire = NULL; multirt_resolve_next = B_TRUE; continue; } if (sire != NULL) ire_refrele(sire); ipif_refrele(src_ipif); ill_refrele(dst_ill); return; } case IRE_IF_NORESOLVER: { /* * We have what we need to build an IRE_CACHE. * * Create a new res_mp with the IP gateway address * in destination address in the DLPI hdr if the * physical length is exactly 4 bytes. */ if (dst_ill->ill_phys_addr_length == IP_ADDR_LEN) { uchar_t *addr; if (gw) addr = (uchar_t *)&gw; else addr = (uchar_t *)&dst; res_mp = ill_dlur_gen(addr, dst_ill->ill_phys_addr_length, dst_ill->ill_sap, dst_ill->ill_sap_length); if (res_mp == NULL) { ip1dbg(("ip_newroute: res_mp NULL\n")); break; } } else if (dst_ill->ill_resolver_mp == NULL) { ip1dbg(("ip_newroute: dst_ill %p " "for IF_NORESOLV ire %p has " "no ill_resolver_mp\n", (void *)dst_ill, (void *)ire)); break; } else { res_mp = NULL; } /* * TSol note: We are creating the ire cache for the * destination 'dst'. If 'dst' is offlink, going * through the first hop 'gw', the security attributes * of 'dst' must be set to point to the gateway * credentials of gateway 'gw'. If 'dst' is onlink, it * is possible that 'dst' is a potential gateway that is * referenced by some route that has some security * attributes. Thus in the former case, we need to do a * gcgrp_lookup of 'gw' while in the latter case we * need to do gcgrp_lookup of 'dst' itself. */ ga.ga_af = AF_INET; IN6_IPADDR_TO_V4MAPPED(gw != INADDR_ANY ? gw : dst, &ga.ga_addr); gcgrp = gcgrp_lookup(&ga, B_FALSE); ire = ire_create( (uchar_t *)&dst, /* dest address */ (uchar_t *)&ip_g_all_ones, /* mask */ (uchar_t *)&src_ipif->ipif_src_addr, /* src addr */ (uchar_t *)&gw, /* gateway address */ NULL, &save_ire->ire_max_frag, NULL, /* Fast Path header */ dst_ill->ill_rq, /* recv-from queue */ dst_ill->ill_wq, /* send-to queue */ IRE_CACHE, res_mp, src_ipif, in_ill, /* Incoming ill */ save_ire->ire_mask, /* Parent mask */ (sire != NULL) ? /* Parent handle */ sire->ire_phandle : 0, save_ire->ire_ihandle, /* Interface handle */ (sire != NULL) ? sire->ire_flags & (RTF_SETSRC | RTF_MULTIRT) : 0, /* flags */ &(save_ire->ire_uinfo), NULL, gcgrp); if (dst_ill->ill_phys_addr_length == IP_ADDR_LEN) freeb(res_mp); if (ire == NULL) { if (gcgrp != NULL) { GCGRP_REFRELE(gcgrp); gcgrp = NULL; } ire_refrele(save_ire); break; } /* reference now held by IRE */ gcgrp = NULL; ire->ire_marks |= ire_marks; /* Prevent save_ire from getting deleted */ IRB_REFHOLD(save_ire->ire_bucket); /* Has it been removed already ? */ if (save_ire->ire_marks & IRE_MARK_CONDEMNED) { IRB_REFRELE(save_ire->ire_bucket); ire_refrele(save_ire); break; } /* * In the case of multirouting, a copy * of the packet is made before it is sent. * The copy is used in the next * loop to attempt another resolution. */ xmit_mp = first_mp; if ((sire != NULL) && (sire->ire_flags & RTF_MULTIRT)) { copy_mp = copymsg(first_mp); if (copy_mp != NULL) { xmit_mp = copy_mp; MULTIRT_DEBUG_TAG(first_mp); } } ire_add_then_send(q, ire, xmit_mp); /* Assert that it is not deleted yet. */ ASSERT(save_ire->ire_ptpn != NULL); IRB_REFRELE(save_ire->ire_bucket); ire_refrele(save_ire); if (copy_mp != NULL) { /* * If we found a (no)resolver, we ignore any * trailing top priority IRE_CACHE in further * loops. This ensures that we do not omit any * (no)resolver. * This IRE_CACHE, if any, will be processed * by another thread entering ip_newroute(). * IRE_CACHE entries, if any, will be processed * by another thread entering ip_newroute(), * (upon resolver response, for instance). * This aims to force parallel multirt * resolutions as soon as a packet must be sent. * In the best case, after the tx of only one * packet, all reachable routes are resolved. * Otherwise, the resolution of all RTF_MULTIRT * routes would require several emissions. */ multirt_flags &= ~MULTIRT_CACHEGW; /* * Search for the next unresolved multirt * route. */ copy_mp = NULL; save_ire = NULL; ire = NULL; multirt_resolve_next = B_TRUE; continue; } /* * Don't need sire anymore */ if (sire != NULL) ire_refrele(sire); ipif_refrele(src_ipif); ill_refrele(dst_ill); return; } case IRE_IF_RESOLVER: /* * We can't build an IRE_CACHE yet, but at least we * found a resolver that can help. */ res_mp = dst_ill->ill_resolver_mp; if (!OK_RESOLVER_MP(res_mp)) break; /* * To be at this point in the code with a non-zero gw * means that dst is reachable through a gateway that * we have never resolved. By changing dst to the gw * addr we resolve the gateway first. * When ire_add_then_send() tries to put the IP dg * to dst, it will reenter ip_newroute() at which * time we will find the IRE_CACHE for the gw and * create another IRE_CACHE in case IRE_CACHE above. */ if (gw != INADDR_ANY) { /* * The source ipif that was determined above was * relative to the destination address, not the * gateway's. If src_ipif was not taken out of * the IRE_IF_RESOLVER entry, we'll need to call * ipif_select_source() again. */ if (src_ipif != ire->ire_ipif) { ipif_refrele(src_ipif); src_ipif = ipif_select_source(dst_ill, gw, zoneid); if (src_ipif == NULL) { if (ip_debug > 2) { pr_addr_dbg( "ip_newroute: no " "src for gw %s ", AF_INET, &gw); printf("through " "interface %s\n", dst_ill->ill_name); } goto icmp_err_ret; } } save_dst = dst; dst = gw; gw = INADDR_ANY; } /* * We obtain a partial IRE_CACHE which we will pass * along with the resolver query. When the response * comes back it will be there ready for us to add. * The ire_max_frag is atomically set under the * irebucket lock in ire_add_v[46]. */ ire = ire_create_mp( (uchar_t *)&dst, /* dest address */ (uchar_t *)&ip_g_all_ones, /* mask */ (uchar_t *)&src_ipif->ipif_src_addr, /* src addr */ (uchar_t *)&gw, /* gateway address */ NULL, /* no in_src_addr */ NULL, /* ire_max_frag */ NULL, /* Fast Path header */ dst_ill->ill_rq, /* recv-from queue */ dst_ill->ill_wq, /* send-to queue */ IRE_CACHE, NULL, src_ipif, /* Interface ipif */ in_ill, /* Incoming ILL */ save_ire->ire_mask, /* Parent mask */ 0, save_ire->ire_ihandle, /* Interface handle */ 0, /* flags if any */ &(save_ire->ire_uinfo), NULL, NULL); if (ire == NULL) { ire_refrele(save_ire); break; } if ((sire != NULL) && (sire->ire_flags & RTF_MULTIRT)) { copy_mp = copymsg(first_mp); if (copy_mp != NULL) MULTIRT_DEBUG_TAG(copy_mp); } ire->ire_marks |= ire_marks; /* * Construct message chain for the resolver * of the form: * ARP_REQ_MBLK-->IRE_MBLK-->Packet * Packet could contain a IPSEC_OUT mp. * * NOTE : ire will be added later when the response * comes back from ARP. If the response does not * come back, ARP frees the packet. For this reason, * we can't REFHOLD the bucket of save_ire to prevent * deletions. We may not be able to REFRELE the bucket * if the response never comes back. Thus, before * adding the ire, ire_add_v4 will make sure that the * interface route does not get deleted. This is the * only case unlike ip_newroute_v6, ip_newroute_ipif_v6 * where we can always prevent deletions because of * the synchronous nature of adding IRES i.e * ire_add_then_send is called after creating the IRE. */ ASSERT(ire->ire_mp != NULL); ire->ire_mp->b_cont = first_mp; /* Have saved_mp handy, for cleanup if canput fails */ saved_mp = mp; mp = copyb(res_mp); if (mp == NULL) { /* Prepare for cleanup */ mp = saved_mp; /* pkt */ ire_delete(ire); /* ire_mp */ ire = NULL; ire_refrele(save_ire); if (copy_mp != NULL) { MULTIRT_DEBUG_UNTAG(copy_mp); freemsg(copy_mp); copy_mp = NULL; } break; } linkb(mp, ire->ire_mp); /* * Fill in the source and dest addrs for the resolver. * NOTE: this depends on memory layouts imposed by * ill_init(). */ areq = (areq_t *)mp->b_rptr; addrp = (ipaddr_t *)((char *)areq + areq->areq_sender_addr_offset); if (do_attach_ill) { /* * This is bind to no failover case. * arp packet also must go out on attach_ill. */ ASSERT(ipha->ipha_src != NULL); *addrp = ipha->ipha_src; } else { *addrp = save_ire->ire_src_addr; } ire_refrele(save_ire); addrp = (ipaddr_t *)((char *)areq + areq->areq_target_addr_offset); *addrp = dst; /* Up to the resolver. */ if (canputnext(dst_ill->ill_rq) && !(dst_ill->ill_arp_closing)) { putnext(dst_ill->ill_rq, mp); ire = NULL; if (copy_mp != NULL) { /* * If we found a resolver, we ignore * any trailing top priority IRE_CACHE * in the further loops. This ensures * that we do not omit any resolver. * IRE_CACHE entries, if any, will be * processed next time we enter * ip_newroute(). */ multirt_flags &= ~MULTIRT_CACHEGW; /* * Search for the next unresolved * multirt route. */ first_mp = copy_mp; copy_mp = NULL; /* Prepare the next resolution loop. */ mp = first_mp; EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (mctl_present) io = (ipsec_out_t *) first_mp->b_rptr; ipha = (ipha_t *)mp->b_rptr; ASSERT(sire != NULL); dst = save_dst; multirt_resolve_next = B_TRUE; continue; } if (sire != NULL) ire_refrele(sire); /* * The response will come back in ip_wput * with db_type IRE_DB_TYPE. */ ipif_refrele(src_ipif); ill_refrele(dst_ill); return; } else { /* Prepare for cleanup */ DTRACE_PROBE1(ip__newroute__drop, mblk_t *, mp); mp->b_cont = NULL; freeb(mp); /* areq */ /* * this is an ire that is not added to the * cache. ire_freemblk will handle the release * of any resources associated with the ire. */ ire_delete(ire); /* ire_mp */ mp = saved_mp; /* pkt */ ire = NULL; if (copy_mp != NULL) { MULTIRT_DEBUG_UNTAG(copy_mp); freemsg(copy_mp); copy_mp = NULL; } break; } default: break; } } while (multirt_resolve_next); ip1dbg(("ip_newroute: dropped\n")); /* Did this packet originate externally? */ if (mp->b_prev) { mp->b_next = NULL; mp->b_prev = NULL; BUMP_MIB(&ip_mib, ipInDiscards); } else { BUMP_MIB(&ip_mib, ipOutDiscards); } ASSERT(copy_mp == NULL); MULTIRT_DEBUG_UNTAG(first_mp); freemsg(first_mp); if (ire != NULL) ire_refrele(ire); if (sire != NULL) ire_refrele(sire); if (src_ipif != NULL) ipif_refrele(src_ipif); if (dst_ill != NULL) ill_refrele(dst_ill); return; icmp_err_ret: ip1dbg(("ip_newroute: no route\n")); if (src_ipif != NULL) ipif_refrele(src_ipif); if (dst_ill != NULL) ill_refrele(dst_ill); if (sire != NULL) ire_refrele(sire); /* Did this packet originate externally? */ if (mp->b_prev) { mp->b_next = NULL; mp->b_prev = NULL; /* XXX ipInNoRoutes */ q = WR(q); } else { /* * Since ip_wput() isn't close to finished, we fill * in enough of the header for credible error reporting. */ if (ip_hdr_complete(ipha, zoneid)) { /* Failed */ MULTIRT_DEBUG_UNTAG(first_mp); freemsg(first_mp); if (ire != NULL) ire_refrele(ire); return; } } BUMP_MIB(&ip_mib, ipOutNoRoutes); /* * At this point we will have ire only if RTF_BLACKHOLE * or RTF_REJECT flags are set on the IRE. It will not * generate ICMP_HOST_UNREACHABLE if RTF_BLACKHOLE is set. */ if (ire != NULL) { if (ire->ire_flags & RTF_BLACKHOLE) { ire_refrele(ire); MULTIRT_DEBUG_UNTAG(first_mp); freemsg(first_mp); return; } ire_refrele(ire); } if (ip_source_routed(ipha)) { icmp_unreachable(q, first_mp, ICMP_SOURCE_ROUTE_FAILED, zoneid); return; } icmp_unreachable(q, first_mp, ICMP_HOST_UNREACHABLE, zoneid); } /* * IPv4 - * ip_newroute_ipif is called by ip_wput_multicast and * ip_rput_forward_multicast whenever we need to send * out a packet to a destination address for which we do not have specific * routing information. It is used when the packet will be sent out * on a specific interface. It is also called by ip_wput() when IP_XMIT_IF * socket option is set or icmp error message wants to go out on a particular * interface for a unicast packet. * * In most cases, the destination address is resolved thanks to the ipif * intrinsic resolver. However, there are some cases where the call to * ip_newroute_ipif must take into account the potential presence of * RTF_SETSRC and/or RTF_MULITRT flags in an IRE_OFFSUBNET ire * that uses the interface. This is specified through flags, * which can be a combination of: * - RTF_SETSRC: if an IRE_OFFSUBNET ire exists that has the RTF_SETSRC * flag, the resulting ire will inherit the IRE_OFFSUBNET source address * and flags. Additionally, the packet source address has to be set to * the specified address. The caller is thus expected to set this flag * if the packet has no specific source address yet. * - RTF_MULTIRT: if an IRE_OFFSUBNET ire exists that has the RTF_MULTIRT * flag, the resulting ire will inherit the flag. All unresolved routes * to the destination must be explored in the same call to * ip_newroute_ipif(). */ static void ip_newroute_ipif(queue_t *q, mblk_t *mp, ipif_t *ipif, ipaddr_t dst, conn_t *connp, uint32_t flags, zoneid_t zoneid) { areq_t *areq; ire_t *ire = NULL; mblk_t *res_mp; ipaddr_t *addrp; mblk_t *first_mp; ire_t *save_ire = NULL; ill_t *attach_ill = NULL; /* Bind to IPIF_NOFAILOVER */ ipif_t *src_ipif = NULL; ushort_t ire_marks = 0; ill_t *dst_ill = NULL; boolean_t mctl_present; ipsec_out_t *io; ipha_t *ipha; int ihandle = 0; mblk_t *saved_mp; ire_t *fire = NULL; mblk_t *copy_mp = NULL; boolean_t multirt_resolve_next; ipaddr_t ipha_dst; /* * CGTP goes in a loop which looks up a new ipif, do an ipif_refhold * here for uniformity */ ipif_refhold(ipif); /* * This loop is run only once in most cases. * We loop to resolve further routes only when the destination * can be reached through multiple RTF_MULTIRT-flagged ires. */ do { if (dst_ill != NULL) { ill_refrele(dst_ill); dst_ill = NULL; } if (src_ipif != NULL) { ipif_refrele(src_ipif); src_ipif = NULL; } multirt_resolve_next = B_FALSE; ip1dbg(("ip_newroute_ipif: dst 0x%x, if %s\n", ntohl(dst), ipif->ipif_ill->ill_name)); EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (mctl_present) io = (ipsec_out_t *)first_mp->b_rptr; ipha = (ipha_t *)mp->b_rptr; /* * Save the packet destination address, we may need it after * the packet has been consumed. */ ipha_dst = ipha->ipha_dst; /* * If the interface is a pt-pt interface we look for an * IRE_IF_RESOLVER or IRE_IF_NORESOLVER that matches both the * local_address and the pt-pt destination address. Otherwise * we just match the local address. * NOTE: dst could be different than ipha->ipha_dst in case * of sending igmp multicast packets over a point-to-point * connection. * Thus we must be careful enough to check ipha_dst to be a * multicast address, otherwise it will take xmit_if path for * multicast packets resulting into kernel stack overflow by * repeated calls to ip_newroute_ipif from ire_send(). */ if (CLASSD(ipha_dst) && !(ipif->ipif_ill->ill_flags & ILLF_MULTICAST)) { goto err_ret; } /* * We check if an IRE_OFFSUBNET for the addr that goes through * ipif exists. We need it to determine if the RTF_SETSRC and/or * RTF_MULTIRT flags must be honored. This IRE_OFFSUBNET ire may * propagate its flags to the new ire. */ if (CLASSD(ipha_dst) && (flags & (RTF_MULTIRT | RTF_SETSRC))) { fire = ipif_lookup_multi_ire(ipif, ipha_dst); ip2dbg(("ip_newroute_ipif: " "ipif_lookup_multi_ire(" "ipif %p, dst %08x) = fire %p\n", (void *)ipif, ntohl(dst), (void *)fire)); } if (mctl_present && io->ipsec_out_attach_if) { attach_ill = ip_grab_attach_ill(NULL, first_mp, io->ipsec_out_ill_index, B_FALSE); /* Failure case frees things for us. */ if (attach_ill == NULL) { ipif_refrele(ipif); if (fire != NULL) ire_refrele(fire); return; } /* * Check if we need an ire that will not be * looked up by anybody else i.e. HIDDEN. */ if (ill_is_probeonly(attach_ill)) { ire_marks = IRE_MARK_HIDDEN; } /* * ip_wput passes the right ipif for IPIF_NOFAILOVER * case. */ dst_ill = ipif->ipif_ill; /* attach_ill has been refheld by ip_grab_attach_ill */ ASSERT(dst_ill == attach_ill); } else { /* * If this is set by IP_XMIT_IF, then make sure that * ipif is pointing to the same ill as the IP_XMIT_IF * specified ill. */ ASSERT((connp == NULL) || (connp->conn_xmit_if_ill == NULL) || (connp->conn_xmit_if_ill == ipif->ipif_ill)); /* * If the interface belongs to an interface group, * make sure the next possible interface in the group * is used. This encourages load spreading among * peers in an interface group. * Note: load spreading is disabled for RTF_MULTIRT * routes. */ if ((flags & RTF_MULTIRT) && (fire != NULL) && (fire->ire_flags & RTF_MULTIRT)) { /* * Don't perform outbound load spreading * in the case of an RTF_MULTIRT issued route, * we actually typically want to replicate * outgoing packets through particular * interfaces. */ dst_ill = ipif->ipif_ill; ill_refhold(dst_ill); } else { dst_ill = ip_newroute_get_dst_ill( ipif->ipif_ill); } if (dst_ill == NULL) { if (ip_debug > 2) { pr_addr_dbg("ip_newroute_ipif: " "no dst ill for dst %s\n", AF_INET, &dst); } goto err_ret; } } /* * Pick a source address preferring non-deprecated ones. * Unlike ip_newroute, we don't do any source address * selection here since for multicast it really does not help * in inbound load spreading as in the unicast case. */ if ((flags & RTF_SETSRC) && (fire != NULL) && (fire->ire_flags & RTF_SETSRC)) { /* * As requested by flags, an IRE_OFFSUBNET was looked up * on that interface. This ire has RTF_SETSRC flag, so * the source address of the packet must be changed. * Check that the ipif matching the requested source * address still exists. */ src_ipif = ipif_lookup_addr(fire->ire_src_addr, NULL, zoneid, NULL, NULL, NULL, NULL); } if (((ipif->ipif_flags & IPIF_DEPRECATED) || (connp != NULL && ipif->ipif_zoneid != zoneid && ipif->ipif_zoneid != ALL_ZONES)) && (src_ipif == NULL)) { src_ipif = ipif_select_source(dst_ill, dst, zoneid); if (src_ipif == NULL) { if (ip_debug > 2) { /* ip1dbg */ pr_addr_dbg("ip_newroute_ipif: " "no src for dst %s", AF_INET, &dst); } ip1dbg((" through interface %s\n", dst_ill->ill_name)); goto err_ret; } ipif_refrele(ipif); ipif = src_ipif; ipif_refhold(ipif); } if (src_ipif == NULL) { src_ipif = ipif; ipif_refhold(src_ipif); } /* * Assign a source address while we have the conn. * We can't have ip_wput_ire pick a source address when the * packet returns from arp since conn_unspec_src might be set * and we loose the conn when going through arp. */ if (ipha->ipha_src == INADDR_ANY && (connp == NULL || !connp->conn_unspec_src)) { ipha->ipha_src = src_ipif->ipif_src_addr; } /* * In case of IP_XMIT_IF, it is possible that the outgoing * interface does not have an interface ire. * Example: Thousands of mobileip PPP interfaces to mobile * nodes. We don't want to create interface ires because * packets from other mobile nodes must not take the route * via interface ires to the visiting mobile node without * going through the home agent, in absence of mobileip * route optimization. */ if (CLASSD(ipha_dst) && (connp == NULL || connp->conn_xmit_if_ill == NULL)) { /* ipif_to_ire returns an held ire */ ire = ipif_to_ire(ipif); if (ire == NULL) goto err_ret; if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) goto err_ret; /* * ihandle is needed when the ire is added to * cache table. */ save_ire = ire; ihandle = save_ire->ire_ihandle; ip2dbg(("ip_newroute_ipif: ire %p, ipif %p, " "flags %04x\n", (void *)ire, (void *)ipif, flags)); if ((flags & RTF_MULTIRT) && (fire != NULL) && (fire->ire_flags & RTF_MULTIRT)) { /* * As requested by flags, an IRE_OFFSUBNET was * looked up on that interface. This ire has * RTF_MULTIRT flag, so the resolution loop will * be re-entered to resolve additional routes on * other interfaces. For that purpose, a copy of * the packet is performed at this point. */ fire->ire_last_used_time = lbolt; copy_mp = copymsg(first_mp); if (copy_mp) { MULTIRT_DEBUG_TAG(copy_mp); } } if ((flags & RTF_SETSRC) && (fire != NULL) && (fire->ire_flags & RTF_SETSRC)) { /* * As requested by flags, an IRE_OFFSUBET was * looked up on that interface. This ire has * RTF_SETSRC flag, so the source address of the * packet must be changed. */ ipha->ipha_src = fire->ire_src_addr; } } else { ASSERT((connp == NULL) || (connp->conn_xmit_if_ill != NULL) || (connp->conn_dontroute)); /* * The only ways we can come here are: * 1) IP_XMIT_IF socket option is set * 2) ICMP error message generated from * ip_mrtun_forward() routine and it needs * to go through the specified ill. * 3) SO_DONTROUTE socket option is set * In all cases, the new ire will not be added * into cache table. */ ire_marks |= IRE_MARK_NOADD; } switch (ipif->ipif_net_type) { case IRE_IF_NORESOLVER: { /* We have what we need to build an IRE_CACHE. */ mblk_t *res_mp; /* * Create a new res_mp with the * IP gateway address as destination address in the * DLPI hdr if the physical length is exactly 4 bytes. */ if (dst_ill->ill_phys_addr_length == IP_ADDR_LEN) { res_mp = ill_dlur_gen((uchar_t *)&dst, dst_ill->ill_phys_addr_length, dst_ill->ill_sap, dst_ill->ill_sap_length); } else if (dst_ill->ill_resolver_mp == NULL) { ip1dbg(("ip_newroute: dst_ill %p " "for IF_NORESOLV ire %p has " "no ill_resolver_mp\n", (void *)dst_ill, (void *)ire)); break; } else { /* use the value set in ip_ll_subnet_defaults */ res_mp = ill_dlur_gen(NULL, dst_ill->ill_phys_addr_length, dst_ill->ill_sap, dst_ill->ill_sap_length); } if (res_mp == NULL) break; /* * The new ire inherits the IRE_OFFSUBNET flags * and source address, if this was requested. */ ire = ire_create( (uchar_t *)&dst, /* dest address */ (uchar_t *)&ip_g_all_ones, /* mask */ (uchar_t *)&src_ipif->ipif_src_addr, /* src addr */ NULL, /* gateway address */ NULL, &ipif->ipif_mtu, NULL, /* Fast Path header */ dst_ill->ill_rq, /* recv-from queue */ dst_ill->ill_wq, /* send-to queue */ IRE_CACHE, res_mp, src_ipif, NULL, (save_ire != NULL ? save_ire->ire_mask : 0), (fire != NULL) ? /* Parent handle */ fire->ire_phandle : 0, ihandle, /* Interface handle */ (fire != NULL) ? (fire->ire_flags & (RTF_SETSRC | RTF_MULTIRT)) : 0, (save_ire == NULL ? &ire_uinfo_null : &save_ire->ire_uinfo), NULL, NULL); freeb(res_mp); if (ire == NULL) { if (save_ire != NULL) ire_refrele(save_ire); break; } ire->ire_marks |= ire_marks; /* * If IRE_MARK_NOADD is set then we need to convert * the max_fragp to a useable value now. This is * normally done in ire_add_v[46]. We also need to * associate the ire with an nce (normally would be * done in ip_wput_nondata()). * * Note that IRE_MARK_NOADD packets created here * do not have a non-null ire_mp pointer. The null * value of ire_bucket indicates that they were * never added. */ if (ire->ire_marks & IRE_MARK_NOADD) { uint_t max_frag; max_frag = *ire->ire_max_fragp; ire->ire_max_fragp = NULL; ire->ire_max_frag = max_frag; if ((ire->ire_nce = ndp_lookup_v4( ire_to_ill(ire), (ire->ire_gateway_addr != INADDR_ANY ? &ire->ire_gateway_addr : &ire->ire_addr), B_FALSE)) == NULL) { if (save_ire != NULL) ire_refrele(save_ire); break; } ASSERT(ire->ire_nce->nce_state == ND_REACHABLE); NCE_REFHOLD_TO_REFHOLD_NOTR(ire->ire_nce); } /* Prevent save_ire from getting deleted */ if (save_ire != NULL) { IRB_REFHOLD(save_ire->ire_bucket); /* Has it been removed already ? */ if (save_ire->ire_marks & IRE_MARK_CONDEMNED) { IRB_REFRELE(save_ire->ire_bucket); ire_refrele(save_ire); break; } } ire_add_then_send(q, ire, first_mp); /* Assert that save_ire is not deleted yet. */ if (save_ire != NULL) { ASSERT(save_ire->ire_ptpn != NULL); IRB_REFRELE(save_ire->ire_bucket); ire_refrele(save_ire); save_ire = NULL; } if (fire != NULL) { ire_refrele(fire); fire = NULL; } /* * the resolution loop is re-entered if this * was requested through flags and if we * actually are in a multirouting case. */ if ((flags & RTF_MULTIRT) && (copy_mp != NULL)) { boolean_t need_resolve = ire_multirt_need_resolve(ipha_dst, MBLK_GETLABEL(copy_mp)); if (!need_resolve) { MULTIRT_DEBUG_UNTAG(copy_mp); freemsg(copy_mp); copy_mp = NULL; } else { /* * ipif_lookup_group() calls * ire_lookup_multi() that uses * ire_ftable_lookup() to find * an IRE_INTERFACE for the group. * In the multirt case, * ire_lookup_multi() then invokes * ire_multirt_lookup() to find * the next resolvable ire. * As a result, we obtain an new * interface, derived from the * next ire. */ ipif_refrele(ipif); ipif = ipif_lookup_group(ipha_dst, zoneid); ip2dbg(("ip_newroute_ipif: " "multirt dst %08x, ipif %p\n", htonl(dst), (void *)ipif)); if (ipif != NULL) { mp = copy_mp; copy_mp = NULL; multirt_resolve_next = B_TRUE; continue; } else { freemsg(copy_mp); } } } if (ipif != NULL) ipif_refrele(ipif); ill_refrele(dst_ill); ipif_refrele(src_ipif); return; } case IRE_IF_RESOLVER: /* * We can't build an IRE_CACHE yet, but at least * we found a resolver that can help. */ res_mp = dst_ill->ill_resolver_mp; if (!OK_RESOLVER_MP(res_mp)) break; /* * We obtain a partial IRE_CACHE which we will pass * along with the resolver query. When the response * comes back it will be there ready for us to add. * The new ire inherits the IRE_OFFSUBNET flags * and source address, if this was requested. * The ire_max_frag is atomically set under the * irebucket lock in ire_add_v[46]. Only in the * case of IRE_MARK_NOADD, we set it here itself. */ ire = ire_create_mp( (uchar_t *)&dst, /* dest address */ (uchar_t *)&ip_g_all_ones, /* mask */ (uchar_t *)&src_ipif->ipif_src_addr, /* src addr */ NULL, /* gateway address */ NULL, /* no in_src_addr */ (ire_marks & IRE_MARK_NOADD) ? ipif->ipif_mtu : 0, /* max_frag */ NULL, /* Fast path header */ dst_ill->ill_rq, /* recv-from queue */ dst_ill->ill_wq, /* send-to queue */ IRE_CACHE, NULL, /* let ire_nce_init figure res_mp out */ src_ipif, NULL, (save_ire != NULL ? save_ire->ire_mask : 0), (fire != NULL) ? /* Parent handle */ fire->ire_phandle : 0, ihandle, /* Interface handle */ (fire != NULL) ? /* flags if any */ (fire->ire_flags & (RTF_SETSRC | RTF_MULTIRT)) : 0, (save_ire == NULL ? &ire_uinfo_null : &save_ire->ire_uinfo), NULL, NULL); if (save_ire != NULL) { ire_refrele(save_ire); save_ire = NULL; } if (ire == NULL) break; ire->ire_marks |= ire_marks; /* * Construct message chain for the resolver of the * form: * ARP_REQ_MBLK-->IRE_MBLK-->Packet * * NOTE : ire will be added later when the response * comes back from ARP. If the response does not * come back, ARP frees the packet. For this reason, * we can't REFHOLD the bucket of save_ire to prevent * deletions. We may not be able to REFRELE the * bucket if the response never comes back. * Thus, before adding the ire, ire_add_v4 will make * sure that the interface route does not get deleted. * This is the only case unlike ip_newroute_v6, * ip_newroute_ipif_v6 where we can always prevent * deletions because ire_add_then_send is called after * creating the IRE. * If IRE_MARK_NOADD is set, then ire_add_then_send * does not add this IRE into the IRE CACHE. */ ASSERT(ire->ire_mp != NULL); ire->ire_mp->b_cont = first_mp; /* Have saved_mp handy, for cleanup if canput fails */ saved_mp = mp; mp = copyb(res_mp); if (mp == NULL) { /* Prepare for cleanup */ mp = saved_mp; /* pkt */ ire_delete(ire); /* ire_mp */ ire = NULL; if (copy_mp != NULL) { MULTIRT_DEBUG_UNTAG(copy_mp); freemsg(copy_mp); copy_mp = NULL; } break; } linkb(mp, ire->ire_mp); /* * Fill in the source and dest addrs for the resolver. * NOTE: this depends on memory layouts imposed by * ill_init(). */ areq = (areq_t *)mp->b_rptr; addrp = (ipaddr_t *)((char *)areq + areq->areq_sender_addr_offset); *addrp = ire->ire_src_addr; addrp = (ipaddr_t *)((char *)areq + areq->areq_target_addr_offset); *addrp = dst; /* Up to the resolver. */ if (canputnext(dst_ill->ill_rq) && !(dst_ill->ill_arp_closing)) { putnext(dst_ill->ill_rq, mp); /* * The response will come back in ip_wput * with db_type IRE_DB_TYPE. */ } else { mp->b_cont = NULL; freeb(mp); /* areq */ ire_delete(ire); /* ire_mp */ saved_mp->b_next = NULL; saved_mp->b_prev = NULL; freemsg(first_mp); /* pkt */ ip2dbg(("ip_newroute_ipif: dropped\n")); } if (fire != NULL) { ire_refrele(fire); fire = NULL; } /* * The resolution loop is re-entered if this was * requested through flags and we actually are * in a multirouting case. */ if ((flags & RTF_MULTIRT) && (copy_mp != NULL)) { boolean_t need_resolve = ire_multirt_need_resolve(ipha_dst, MBLK_GETLABEL(copy_mp)); if (!need_resolve) { MULTIRT_DEBUG_UNTAG(copy_mp); freemsg(copy_mp); copy_mp = NULL; } else { /* * ipif_lookup_group() calls * ire_lookup_multi() that uses * ire_ftable_lookup() to find * an IRE_INTERFACE for the group. * In the multirt case, * ire_lookup_multi() then invokes * ire_multirt_lookup() to find * the next resolvable ire. * As a result, we obtain an new * interface, derived from the * next ire. */ ipif_refrele(ipif); ipif = ipif_lookup_group(ipha_dst, zoneid); if (ipif != NULL) { mp = copy_mp; copy_mp = NULL; multirt_resolve_next = B_TRUE; continue; } else { freemsg(copy_mp); } } } if (ipif != NULL) ipif_refrele(ipif); ill_refrele(dst_ill); ipif_refrele(src_ipif); return; default: break; } } while (multirt_resolve_next); err_ret: ip2dbg(("ip_newroute_ipif: dropped\n")); if (fire != NULL) ire_refrele(fire); ipif_refrele(ipif); /* Did this packet originate externally? */ if (dst_ill != NULL) ill_refrele(dst_ill); if (src_ipif != NULL) ipif_refrele(src_ipif); if (mp->b_prev || mp->b_next) { mp->b_next = NULL; mp->b_prev = NULL; } else { /* * Since ip_wput() isn't close to finished, we fill * in enough of the header for credible error reporting. */ if (ip_hdr_complete((ipha_t *)mp->b_rptr, zoneid)) { /* Failed */ freemsg(first_mp); if (ire != NULL) ire_refrele(ire); return; } } /* * At this point we will have ire only if RTF_BLACKHOLE * or RTF_REJECT flags are set on the IRE. It will not * generate ICMP_HOST_UNREACHABLE if RTF_BLACKHOLE is set. */ if (ire != NULL) { if (ire->ire_flags & RTF_BLACKHOLE) { ire_refrele(ire); freemsg(first_mp); return; } ire_refrele(ire); } icmp_unreachable(q, first_mp, ICMP_HOST_UNREACHABLE, zoneid); } /* Name/Value Table Lookup Routine */ char * ip_nv_lookup(nv_t *nv, int value) { if (!nv) return (NULL); for (; nv->nv_name; nv++) { if (nv->nv_value == value) return (nv->nv_name); } return ("unknown"); } /* * one day it can be patched to 1 from /etc/system for machines that have few * fast network interfaces feeding multiple cpus. */ int ill_stream_putlocks = 0; /* * This is a module open, i.e. this is a control stream for access * to a DLPI device. We allocate an ill_t as the instance data in * this case. */ int ip_modopen(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { uint32_t mem_cnt; uint32_t cpu_cnt; uint32_t min_cnt; pgcnt_t mem_avail; ill_t *ill; int err; /* * Prevent unprivileged processes from pushing IP so that * they can't send raw IP. */ if (secpolicy_net_rawaccess(credp) != 0) return (EPERM); ill = (ill_t *)mi_open_alloc_sleep(sizeof (ill_t)); q->q_ptr = WR(q)->q_ptr = ill; /* * ill_init initializes the ill fields and then sends down * down a DL_INFO_REQ after calling qprocson. */ err = ill_init(q, ill); if (err != 0) { mi_free(ill); q->q_ptr = NULL; WR(q)->q_ptr = NULL; return (err); } /* ill_init initializes the ipsq marking this thread as writer */ ipsq_exit(ill->ill_phyint->phyint_ipsq, B_TRUE, B_TRUE); /* Wait for the DL_INFO_ACK */ mutex_enter(&ill->ill_lock); while (ill->ill_state_flags & ILL_LL_SUBNET_PENDING) { /* * Return value of 0 indicates a pending signal. */ err = cv_wait_sig(&ill->ill_cv, &ill->ill_lock); if (err == 0) { mutex_exit(&ill->ill_lock); (void) ip_close(q, 0); return (EINTR); } } mutex_exit(&ill->ill_lock); /* * ip_rput_other could have set an error in ill_error on * receipt of M_ERROR. */ err = ill->ill_error; if (err != 0) { (void) ip_close(q, 0); return (err); } /* * ip_ire_max_bucket_cnt is sized below based on the memory * size and the cpu speed of the machine. This is upper * bounded by the compile time value of ip_ire_max_bucket_cnt * and is lower bounded by the compile time value of * ip_ire_min_bucket_cnt. Similar logic applies to * ip6_ire_max_bucket_cnt. */ mem_avail = kmem_avail(); mem_cnt = (mem_avail >> ip_ire_mem_ratio) / ip_cache_table_size / sizeof (ire_t); cpu_cnt = CPU->cpu_type_info.pi_clock >> ip_ire_cpu_ratio; min_cnt = MIN(cpu_cnt, mem_cnt); if (min_cnt < ip_ire_min_bucket_cnt) min_cnt = ip_ire_min_bucket_cnt; if (ip_ire_max_bucket_cnt > min_cnt) { ip_ire_max_bucket_cnt = min_cnt; } mem_cnt = (mem_avail >> ip_ire_mem_ratio) / ip6_cache_table_size / sizeof (ire_t); min_cnt = MIN(cpu_cnt, mem_cnt); if (min_cnt < ip6_ire_min_bucket_cnt) min_cnt = ip6_ire_min_bucket_cnt; if (ip6_ire_max_bucket_cnt > min_cnt) { ip6_ire_max_bucket_cnt = min_cnt; } ill->ill_credp = credp; crhold(credp); mutex_enter(&ip_mi_lock); err = mi_open_link(&ip_g_head, (IDP)ill, devp, flag, sflag, credp); mutex_exit(&ip_mi_lock); if (err) { (void) ip_close(q, 0); return (err); } return (0); } /* IP open routine. */ int ip_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { conn_t *connp; major_t maj; TRACE_1(TR_FAC_IP, TR_IP_OPEN, "ip_open: q %p", q); /* Allow reopen. */ if (q->q_ptr != NULL) return (0); if (sflag & MODOPEN) { /* This is a module open */ return (ip_modopen(q, devp, flag, sflag, credp)); } /* * We are opening as a device. This is an IP client stream, and we * allocate an conn_t as the instance data. */ connp = ipcl_conn_create(IPCL_IPCCONN, KM_SLEEP); connp->conn_upq = q; q->q_ptr = WR(q)->q_ptr = connp; if (flag & SO_SOCKSTR) connp->conn_flags |= IPCL_SOCKET; /* Minor tells us which /dev entry was opened */ if (geteminor(*devp) == IPV6_MINOR) { connp->conn_flags |= IPCL_ISV6; connp->conn_af_isv6 = B_TRUE; ip_setqinfo(q, geteminor(*devp), B_FALSE); connp->conn_src_preferences = IPV6_PREFER_SRC_DEFAULT; } else { connp->conn_af_isv6 = B_FALSE; connp->conn_pkt_isv6 = B_FALSE; } if ((connp->conn_dev = inet_minor_alloc(ip_minor_arena)) == 0) { q->q_ptr = WR(q)->q_ptr = NULL; CONN_DEC_REF(connp); return (EBUSY); } maj = getemajor(*devp); *devp = makedevice(maj, (minor_t)connp->conn_dev); /* * connp->conn_cred is crfree()ed in ipcl_conn_destroy() */ connp->conn_cred = credp; crhold(connp->conn_cred); /* * If the caller has the process-wide flag set, then default to MAC * exempt mode. This allows read-down to unlabeled hosts. */ if (getpflags(NET_MAC_AWARE, credp) != 0) connp->conn_mac_exempt = B_TRUE; connp->conn_zoneid = getzoneid(); /* * This should only happen for ndd, netstat, raw socket or other SCTP * administrative ops. In these cases, we just need a normal conn_t * with ulp set to IPPROTO_SCTP. All other ops are trapped and * an error will be returned. */ if (maj != SCTP_MAJ && maj != SCTP6_MAJ) { connp->conn_rq = q; connp->conn_wq = WR(q); } else { connp->conn_ulp = IPPROTO_SCTP; connp->conn_rq = connp->conn_wq = NULL; } /* Non-zero default values */ connp->conn_multicast_loop = IP_DEFAULT_MULTICAST_LOOP; /* * Make the conn globally visible to walkers */ mutex_enter(&connp->conn_lock); connp->conn_state_flags &= ~CONN_INCIPIENT; mutex_exit(&connp->conn_lock); ASSERT(connp->conn_ref == 1); qprocson(q); return (0); } /* * Change q_qinfo based on the value of isv6. * This can not called on an ill queue. * Note that there is no race since either q_qinfo works for conn queues - it * is just an optimization to enter the best wput routine directly. */ void ip_setqinfo(queue_t *q, minor_t minor, boolean_t bump_mib) { ASSERT(q->q_flag & QREADR); ASSERT(WR(q)->q_next == NULL); ASSERT(q->q_ptr != NULL); if (minor == IPV6_MINOR) { if (bump_mib) BUMP_MIB(&ip6_mib, ipv6OutSwitchIPv4); q->q_qinfo = &rinit_ipv6; WR(q)->q_qinfo = &winit_ipv6; (Q_TO_CONN(q))->conn_pkt_isv6 = B_TRUE; } else { if (bump_mib) BUMP_MIB(&ip_mib, ipOutSwitchIPv6); q->q_qinfo = &iprinit; WR(q)->q_qinfo = &ipwinit; (Q_TO_CONN(q))->conn_pkt_isv6 = B_FALSE; } } /* * See if IPsec needs loading because of the options in mp. */ static boolean_t ipsec_opt_present(mblk_t *mp) { uint8_t *optcp, *next_optcp, *opt_endcp; struct opthdr *opt; struct T_opthdr *topt; int opthdr_len; t_uscalar_t optname, optlevel; struct T_optmgmt_req *tor = (struct T_optmgmt_req *)mp->b_rptr; ipsec_req_t *ipsr; /* * Walk through the mess, and find IP_SEC_OPT. If it's there, * return TRUE. */ optcp = mi_offset_param(mp, tor->OPT_offset, tor->OPT_length); opt_endcp = optcp + tor->OPT_length; if (tor->PRIM_type == T_OPTMGMT_REQ) { opthdr_len = sizeof (struct T_opthdr); } else { /* O_OPTMGMT_REQ */ ASSERT(tor->PRIM_type == T_SVR4_OPTMGMT_REQ); opthdr_len = sizeof (struct opthdr); } for (; optcp < opt_endcp; optcp = next_optcp) { if (optcp + opthdr_len > opt_endcp) return (B_FALSE); /* Not enough option header. */ if (tor->PRIM_type == T_OPTMGMT_REQ) { topt = (struct T_opthdr *)optcp; optlevel = topt->level; optname = topt->name; next_optcp = optcp + _TPI_ALIGN_TOPT(topt->len); } else { opt = (struct opthdr *)optcp; optlevel = opt->level; optname = opt->name; next_optcp = optcp + opthdr_len + _TPI_ALIGN_OPT(opt->len); } if ((next_optcp < optcp) || /* wraparound pointer space */ ((next_optcp >= opt_endcp) && /* last option bad len */ ((next_optcp - opt_endcp) >= __TPI_ALIGN_SIZE))) return (B_FALSE); /* bad option buffer */ if ((optlevel == IPPROTO_IP && optname == IP_SEC_OPT) || (optlevel == IPPROTO_IPV6 && optname == IPV6_SEC_OPT)) { /* * Check to see if it's an all-bypass or all-zeroes * IPsec request. Don't bother loading IPsec if * the socket doesn't want to use it. (A good example * is a bypass request.) * * Basically, if any of the non-NEVER bits are set, * load IPsec. */ ipsr = (ipsec_req_t *)(optcp + opthdr_len); if ((ipsr->ipsr_ah_req & ~IPSEC_PREF_NEVER) != 0 || (ipsr->ipsr_esp_req & ~IPSEC_PREF_NEVER) != 0 || (ipsr->ipsr_self_encap_req & ~IPSEC_PREF_NEVER) != 0) return (B_TRUE); } } return (B_FALSE); } /* * If conn is is waiting for ipsec to finish loading, kick it. */ /* ARGSUSED */ static void conn_restart_ipsec_waiter(conn_t *connp, void *arg) { t_scalar_t optreq_prim; mblk_t *mp; cred_t *cr; int err = 0; /* * This function is called, after ipsec loading is complete. * Since IP checks exclusively and atomically (i.e it prevents * ipsec load from completing until ip_optcom_req completes) * whether ipsec load is complete, there cannot be a race with IP * trying to set the CONN_IPSEC_LOAD_WAIT flag on any conn now. */ mutex_enter(&connp->conn_lock); if (connp->conn_state_flags & CONN_IPSEC_LOAD_WAIT) { ASSERT(connp->conn_ipsec_opt_mp != NULL); mp = connp->conn_ipsec_opt_mp; connp->conn_ipsec_opt_mp = NULL; connp->conn_state_flags &= ~CONN_IPSEC_LOAD_WAIT; cr = DB_CREDDEF(mp, GET_QUEUE_CRED(CONNP_TO_WQ(connp))); mutex_exit(&connp->conn_lock); ASSERT(DB_TYPE(mp) == M_PROTO || DB_TYPE(mp) == M_PCPROTO); optreq_prim = ((union T_primitives *)mp->b_rptr)->type; if (optreq_prim == T_OPTMGMT_REQ) { err = tpi_optcom_req(CONNP_TO_WQ(connp), mp, cr, &ip_opt_obj); } else { ASSERT(optreq_prim == T_SVR4_OPTMGMT_REQ); err = svr4_optcom_req(CONNP_TO_WQ(connp), mp, cr, &ip_opt_obj); } if (err != EINPROGRESS) CONN_OPER_PENDING_DONE(connp); return; } mutex_exit(&connp->conn_lock); } /* * Called from the ipsec_loader thread, outside any perimeter, to tell * ip qenable any of the queues waiting for the ipsec loader to * complete. * * Use ip_mi_lock to be safe here: all modifications of the mi lists * are done with this lock held, so it's guaranteed that none of the * links will change along the way. */ void ip_ipsec_load_complete() { ipcl_walk(conn_restart_ipsec_waiter, NULL); } /* * Can't be used. Need to call svr4* -> optset directly. the leaf routine * determines the grp on which it has to become exclusive, queues the mp * and sq draining restarts the optmgmt */ static boolean_t ip_check_for_ipsec_opt(queue_t *q, mblk_t *mp) { conn_t *connp; /* * Take IPsec requests and treat them special. */ if (ipsec_opt_present(mp)) { /* First check if IPsec is loaded. */ mutex_enter(&ipsec_loader_lock); if (ipsec_loader_state != IPSEC_LOADER_WAIT) { mutex_exit(&ipsec_loader_lock); return (B_FALSE); } connp = Q_TO_CONN(q); mutex_enter(&connp->conn_lock); connp->conn_state_flags |= CONN_IPSEC_LOAD_WAIT; ASSERT(connp->conn_ipsec_opt_mp == NULL); connp->conn_ipsec_opt_mp = mp; mutex_exit(&connp->conn_lock); mutex_exit(&ipsec_loader_lock); ipsec_loader_loadnow(); return (B_TRUE); } return (B_FALSE); } /* * Set IPsec policy from an ipsec_req_t. If the req is not "zero" and valid, * all of them are copied to the conn_t. If the req is "zero", the policy is * zeroed out. A "zero" policy has zero ipsr_{ah,req,self_encap}_req * fields. * We keep only the latest setting of the policy and thus policy setting * is not incremental/cumulative. * * Requests to set policies with multiple alternative actions will * go through a different API. */ int ipsec_set_req(cred_t *cr, conn_t *connp, ipsec_req_t *req) { uint_t ah_req = 0; uint_t esp_req = 0; uint_t se_req = 0; ipsec_selkey_t sel; ipsec_act_t *actp = NULL; uint_t nact; ipsec_policy_t *pin4 = NULL, *pout4 = NULL; ipsec_policy_t *pin6 = NULL, *pout6 = NULL; ipsec_policy_root_t *pr; ipsec_policy_head_t *ph; int fam; boolean_t is_pol_reset; int error = 0; #define REQ_MASK (IPSEC_PREF_REQUIRED|IPSEC_PREF_NEVER) /* * The IP_SEC_OPT option does not allow variable length parameters, * hence a request cannot be NULL. */ if (req == NULL) return (EINVAL); ah_req = req->ipsr_ah_req; esp_req = req->ipsr_esp_req; se_req = req->ipsr_self_encap_req; /* * Are we dealing with a request to reset the policy (i.e. * zero requests). */ is_pol_reset = ((ah_req & REQ_MASK) == 0 && (esp_req & REQ_MASK) == 0 && (se_req & REQ_MASK) == 0); if (!is_pol_reset) { /* * If we couldn't load IPsec, fail with "protocol * not supported". * IPsec may not have been loaded for a request with zero * policies, so we don't fail in this case. */ mutex_enter(&ipsec_loader_lock); if (ipsec_loader_state != IPSEC_LOADER_SUCCEEDED) { mutex_exit(&ipsec_loader_lock); return (EPROTONOSUPPORT); } mutex_exit(&ipsec_loader_lock); /* * Test for valid requests. Invalid algorithms * need to be tested by IPSEC code because new * algorithms can be added dynamically. */ if ((ah_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0 || (esp_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0 || (se_req & ~(REQ_MASK|IPSEC_PREF_UNIQUE)) != 0) { return (EINVAL); } /* * Only privileged users can issue these * requests. */ if (((ah_req & IPSEC_PREF_NEVER) || (esp_req & IPSEC_PREF_NEVER) || (se_req & IPSEC_PREF_NEVER)) && secpolicy_net_config(cr, B_FALSE) != 0) { return (EPERM); } /* * The IPSEC_PREF_REQUIRED and IPSEC_PREF_NEVER * are mutually exclusive. */ if (((ah_req & REQ_MASK) == REQ_MASK) || ((esp_req & REQ_MASK) == REQ_MASK) || ((se_req & REQ_MASK) == REQ_MASK)) { /* Both of them are set */ return (EINVAL); } } mutex_enter(&connp->conn_lock); /* * If we have already cached policies in ip_bind_connected*(), don't * let them change now. We cache policies for connections * whose src,dst [addr, port] is known. */ if (connp->conn_policy_cached) { mutex_exit(&connp->conn_lock); return (EINVAL); } /* * We have a zero policies, reset the connection policy if already * set. This will cause the connection to inherit the * global policy, if any. */ if (is_pol_reset) { if (connp->conn_policy != NULL) { IPPH_REFRELE(connp->conn_policy); connp->conn_policy = NULL; } connp->conn_flags &= ~IPCL_CHECK_POLICY; connp->conn_in_enforce_policy = B_FALSE; connp->conn_out_enforce_policy = B_FALSE; mutex_exit(&connp->conn_lock); return (0); } ph = connp->conn_policy = ipsec_polhead_split(connp->conn_policy); if (ph == NULL) goto enomem; ipsec_actvec_from_req(req, &actp, &nact); if (actp == NULL) goto enomem; /* * Always allocate IPv4 policy entries, since they can also * apply to ipv6 sockets being used in ipv4-compat mode. */ bzero(&sel, sizeof (sel)); sel.ipsl_valid = IPSL_IPV4; pin4 = ipsec_policy_create(&sel, actp, nact, IPSEC_PRIO_SOCKET, NULL); if (pin4 == NULL) goto enomem; pout4 = ipsec_policy_create(&sel, actp, nact, IPSEC_PRIO_SOCKET, NULL); if (pout4 == NULL) goto enomem; if (connp->conn_pkt_isv6) { /* * We're looking at a v6 socket, also allocate the * v6-specific entries... */ sel.ipsl_valid = IPSL_IPV6; pin6 = ipsec_policy_create(&sel, actp, nact, IPSEC_PRIO_SOCKET, NULL); if (pin6 == NULL) goto enomem; pout6 = ipsec_policy_create(&sel, actp, nact, IPSEC_PRIO_SOCKET, NULL); if (pout6 == NULL) goto enomem; /* * .. and file them away in the right place. */ fam = IPSEC_AF_V6; pr = &ph->iph_root[IPSEC_TYPE_INBOUND]; HASHLIST_INSERT(pin6, ipsp_hash, pr->ipr_nonhash[fam]); ipsec_insert_always(&ph->iph_rulebyid, pin6); pr = &ph->iph_root[IPSEC_TYPE_OUTBOUND]; HASHLIST_INSERT(pout6, ipsp_hash, pr->ipr_nonhash[fam]); ipsec_insert_always(&ph->iph_rulebyid, pout6); } ipsec_actvec_free(actp, nact); /* * File the v4 policies. */ fam = IPSEC_AF_V4; pr = &ph->iph_root[IPSEC_TYPE_INBOUND]; HASHLIST_INSERT(pin4, ipsp_hash, pr->ipr_nonhash[fam]); ipsec_insert_always(&ph->iph_rulebyid, pin4); pr = &ph->iph_root[IPSEC_TYPE_OUTBOUND]; HASHLIST_INSERT(pout4, ipsp_hash, pr->ipr_nonhash[fam]); ipsec_insert_always(&ph->iph_rulebyid, pout4); /* * If the requests need security, set enforce_policy. * If the requests are IPSEC_PREF_NEVER, one should * still set conn_out_enforce_policy so that an ipsec_out * gets attached in ip_wput. This is needed so that * for connections that we don't cache policy in ip_bind, * if global policy matches in ip_wput_attach_policy, we * don't wrongly inherit global policy. Similarly, we need * to set conn_in_enforce_policy also so that we don't verify * policy wrongly. */ if ((ah_req & REQ_MASK) != 0 || (esp_req & REQ_MASK) != 0 || (se_req & REQ_MASK) != 0) { connp->conn_in_enforce_policy = B_TRUE; connp->conn_out_enforce_policy = B_TRUE; connp->conn_flags |= IPCL_CHECK_POLICY; } mutex_exit(&connp->conn_lock); return (error); #undef REQ_MASK /* * Common memory-allocation-failure exit path. */ enomem: mutex_exit(&connp->conn_lock); if (actp != NULL) ipsec_actvec_free(actp, nact); if (pin4 != NULL) IPPOL_REFRELE(pin4); if (pout4 != NULL) IPPOL_REFRELE(pout4); if (pin6 != NULL) IPPOL_REFRELE(pin6); if (pout6 != NULL) IPPOL_REFRELE(pout6); return (ENOMEM); } /* * Only for options that pass in an IP addr. Currently only V4 options * pass in an ipif. V6 options always pass an ifindex specifying the ill. * So this function assumes level is IPPROTO_IP */ int ip_opt_set_ipif(conn_t *connp, ipaddr_t addr, boolean_t checkonly, int option, mblk_t *first_mp) { ipif_t *ipif = NULL; int error; ill_t *ill; int zoneid; ip2dbg(("ip_opt_set_ipif: ipaddr %X\n", addr)); if (addr != INADDR_ANY || checkonly) { ASSERT(connp != NULL); zoneid = IPCL_ZONEID(connp); if (option == IP_NEXTHOP) { ipif = ipif_lookup_onlink_addr(addr, connp->conn_zoneid); } else { ipif = ipif_lookup_addr(addr, NULL, zoneid, CONNP_TO_WQ(connp), first_mp, ip_restart_optmgmt, &error); } if (ipif == NULL) { if (error == EINPROGRESS) return (error); else if ((option == IP_MULTICAST_IF) || (option == IP_NEXTHOP)) return (EHOSTUNREACH); else return (EINVAL); } else if (checkonly) { if (option == IP_MULTICAST_IF) { ill = ipif->ipif_ill; /* not supported by the virtual network iface */ if (IS_VNI(ill)) { ipif_refrele(ipif); return (EINVAL); } } ipif_refrele(ipif); return (0); } ill = ipif->ipif_ill; mutex_enter(&connp->conn_lock); mutex_enter(&ill->ill_lock); if ((ill->ill_state_flags & ILL_CONDEMNED) || (ipif->ipif_state_flags & IPIF_CONDEMNED)) { mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); ipif_refrele(ipif); return (option == IP_MULTICAST_IF ? EHOSTUNREACH : EINVAL); } } else { mutex_enter(&connp->conn_lock); } /* None of the options below are supported on the VNI */ if (ipif != NULL && IS_VNI(ipif->ipif_ill)) { mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); ipif_refrele(ipif); return (EINVAL); } switch (option) { case IP_DONTFAILOVER_IF: /* * This option is used by in.mpathd to ensure * that IPMP probe packets only go out on the * test interfaces. in.mpathd sets this option * on the non-failover interfaces. * For backward compatibility, this option * implicitly sets IP_MULTICAST_IF, as used * be done in bind(), so that ip_wput gets * this ipif to send mcast packets. */ if (ipif != NULL) { ASSERT(addr != INADDR_ANY); connp->conn_nofailover_ill = ipif->ipif_ill; connp->conn_multicast_ipif = ipif; } else { ASSERT(addr == INADDR_ANY); connp->conn_nofailover_ill = NULL; connp->conn_multicast_ipif = NULL; } break; case IP_MULTICAST_IF: connp->conn_multicast_ipif = ipif; break; case IP_NEXTHOP: connp->conn_nexthop_v4 = addr; connp->conn_nexthop_set = B_TRUE; break; } if (ipif != NULL) { mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); ipif_refrele(ipif); return (0); } mutex_exit(&connp->conn_lock); /* We succeded in cleared the option */ return (0); } /* * For options that pass in an ifindex specifying the ill. V6 options always * pass in an ill. Some v4 options also pass in ifindex specifying the ill. */ int ip_opt_set_ill(conn_t *connp, int ifindex, boolean_t isv6, boolean_t checkonly, int level, int option, mblk_t *first_mp) { ill_t *ill = NULL; int error = 0; ip2dbg(("ip_opt_set_ill: ifindex %d\n", ifindex)); if (ifindex != 0) { ASSERT(connp != NULL); ill = ill_lookup_on_ifindex(ifindex, isv6, CONNP_TO_WQ(connp), first_mp, ip_restart_optmgmt, &error); if (ill != NULL) { if (checkonly) { /* not supported by the virtual network iface */ if (IS_VNI(ill)) { ill_refrele(ill); return (EINVAL); } ill_refrele(ill); return (0); } if (!ipif_lookup_zoneid_group(ill, connp->conn_zoneid, 0, NULL)) { ill_refrele(ill); ill = NULL; mutex_enter(&connp->conn_lock); goto setit; } mutex_enter(&connp->conn_lock); mutex_enter(&ill->ill_lock); if (ill->ill_state_flags & ILL_CONDEMNED) { mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); ill_refrele(ill); ill = NULL; mutex_enter(&connp->conn_lock); } goto setit; } else if (error == EINPROGRESS) { return (error); } else { error = 0; } } mutex_enter(&connp->conn_lock); setit: ASSERT((level == IPPROTO_IP || level == IPPROTO_IPV6)); /* * The options below assume that the ILL (if any) transmits and/or * receives traffic. Neither of which is true for the virtual network * interface, so fail setting these on a VNI. */ if (IS_VNI(ill)) { ASSERT(ill != NULL); mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); ill_refrele(ill); return (EINVAL); } if (level == IPPROTO_IP) { switch (option) { case IP_BOUND_IF: connp->conn_incoming_ill = ill; connp->conn_outgoing_ill = ill; connp->conn_orig_bound_ifindex = (ill == NULL) ? 0 : ifindex; break; case IP_XMIT_IF: /* * Similar to IP_BOUND_IF, but this only * determines the outgoing interface for * unicast packets. Also no IRE_CACHE entry * is added for the destination of the * outgoing packets. This feature is needed * for mobile IP. */ connp->conn_xmit_if_ill = ill; connp->conn_orig_xmit_ifindex = (ill == NULL) ? 0 : ifindex; break; case IP_MULTICAST_IF: /* * This option is an internal special. The socket * level IP_MULTICAST_IF specifies an 'ipaddr' and * is handled in ip_opt_set_ipif. IPV6_MULTICAST_IF * specifies an ifindex and we try first on V6 ill's. * If we don't find one, we they try using on v4 ill's * intenally and we come here. */ if (!checkonly && ill != NULL) { ipif_t *ipif; ipif = ill->ill_ipif; if (ipif->ipif_state_flags & IPIF_CONDEMNED) { mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); ill_refrele(ill); ill = NULL; mutex_enter(&connp->conn_lock); } else { connp->conn_multicast_ipif = ipif; } } break; } } else { switch (option) { case IPV6_BOUND_IF: connp->conn_incoming_ill = ill; connp->conn_outgoing_ill = ill; connp->conn_orig_bound_ifindex = (ill == NULL) ? 0 : ifindex; break; case IPV6_BOUND_PIF: /* * Limit all transmit to this ill. * Unlike IPV6_BOUND_IF, using this option * prevents load spreading and failover from * happening when the interface is part of the * group. That's why we don't need to remember * the ifindex in orig_bound_ifindex as in * IPV6_BOUND_IF. */ connp->conn_outgoing_pill = ill; break; case IPV6_DONTFAILOVER_IF: /* * This option is used by in.mpathd to ensure * that IPMP probe packets only go out on the * test interfaces. in.mpathd sets this option * on the non-failover interfaces. */ connp->conn_nofailover_ill = ill; /* * For backward compatibility, this option * implicitly sets ip_multicast_ill as used in * IP_MULTICAST_IF so that ip_wput gets * this ipif to send mcast packets. */ connp->conn_multicast_ill = ill; connp->conn_orig_multicast_ifindex = (ill == NULL) ? 0 : ifindex; break; case IPV6_MULTICAST_IF: /* * Set conn_multicast_ill to be the IPv6 ill. * Set conn_multicast_ipif to be an IPv4 ipif * for ifindex to make IPv4 mapped addresses * on PF_INET6 sockets honor IPV6_MULTICAST_IF. * Even if no IPv6 ill exists for the ifindex * we need to check for an IPv4 ifindex in order * for this to work with mapped addresses. In that * case only set conn_multicast_ipif. */ if (!checkonly) { if (ifindex == 0) { connp->conn_multicast_ill = NULL; connp->conn_orig_multicast_ifindex = 0; connp->conn_multicast_ipif = NULL; } else if (ill != NULL) { connp->conn_multicast_ill = ill; connp->conn_orig_multicast_ifindex = ifindex; } } break; } } if (ill != NULL) { mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); ill_refrele(ill); return (0); } mutex_exit(&connp->conn_lock); /* * We succeeded in clearing the option (ifindex == 0) or failed to * locate the ill and could not set the option (ifindex != 0) */ return (ifindex == 0 ? 0 : EINVAL); } /* This routine sets socket options. */ /* ARGSUSED */ int ip_opt_set(queue_t *q, uint_t optset_context, int level, int name, uint_t inlen, uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp, void *dummy, cred_t *cr, mblk_t *first_mp) { int *i1 = (int *)invalp; conn_t *connp = Q_TO_CONN(q); int error = 0; boolean_t checkonly; ire_t *ire; boolean_t found; switch (optset_context) { case SETFN_OPTCOM_CHECKONLY: checkonly = B_TRUE; /* * Note: Implies T_CHECK semantics for T_OPTCOM_REQ * inlen != 0 implies value supplied and * we have to "pretend" to set it. * inlen == 0 implies that there is no * value part in T_CHECK request and just validation * done elsewhere should be enough, we just return here. */ if (inlen == 0) { *outlenp = 0; return (0); } break; case SETFN_OPTCOM_NEGOTIATE: case SETFN_UD_NEGOTIATE: case SETFN_CONN_NEGOTIATE: checkonly = B_FALSE; break; default: /* * We should never get here */ *outlenp = 0; return (EINVAL); } ASSERT((optset_context != SETFN_OPTCOM_CHECKONLY) || (optset_context == SETFN_OPTCOM_CHECKONLY && inlen != 0)); /* * For fixed length options, no sanity check * of passed in length is done. It is assumed *_optcom_req() * routines do the right thing. */ switch (level) { case SOL_SOCKET: /* * conn_lock protects the bitfields, and is used to * set the fields atomically. */ switch (name) { case SO_BROADCAST: if (!checkonly) { /* TODO: use value someplace? */ mutex_enter(&connp->conn_lock); connp->conn_broadcast = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case SO_USELOOPBACK: if (!checkonly) { /* TODO: use value someplace? */ mutex_enter(&connp->conn_lock); connp->conn_loopback = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case SO_DONTROUTE: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_dontroute = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case SO_REUSEADDR: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_reuseaddr = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case SO_PROTOTYPE: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_proto = *i1; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case SO_ALLZONES: if (!checkonly) { mutex_enter(&connp->conn_lock); if (IPCL_IS_BOUND(connp)) { mutex_exit(&connp->conn_lock); return (EINVAL); } connp->conn_allzones = *i1 != 0 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case SO_ANON_MLP: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_anon_mlp = *i1 != 0 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case SO_MAC_EXEMPT: if (secpolicy_net_mac_aware(cr) != 0 || IPCL_IS_BOUND(connp)) return (EACCES); if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_mac_exempt = *i1 != 0 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ default: /* * "soft" error (negative) * option not handled at this level * Note: Do not modify *outlenp */ return (-EINVAL); } break; case IPPROTO_IP: switch (name) { case IP_NEXTHOP: if (secpolicy_net_config(cr, B_FALSE) != 0) return (EPERM); /* FALLTHRU */ case IP_MULTICAST_IF: case IP_DONTFAILOVER_IF: { ipaddr_t addr = *i1; error = ip_opt_set_ipif(connp, addr, checkonly, name, first_mp); if (error != 0) return (error); break; /* goto sizeof (int) option return */ } case IP_MULTICAST_TTL: /* Recorded in transport above IP */ *outvalp = *invalp; *outlenp = sizeof (uchar_t); return (0); case IP_MULTICAST_LOOP: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_multicast_loop = *invalp ? 1 : 0; mutex_exit(&connp->conn_lock); } *outvalp = *invalp; *outlenp = sizeof (uchar_t); return (0); case IP_ADD_MEMBERSHIP: case MCAST_JOIN_GROUP: case IP_DROP_MEMBERSHIP: case MCAST_LEAVE_GROUP: { struct ip_mreq *mreqp; struct group_req *greqp; ire_t *ire; boolean_t done = B_FALSE; ipaddr_t group, ifaddr; struct sockaddr_in *sin; uint32_t *ifindexp; boolean_t mcast_opt = B_TRUE; mcast_record_t fmode; int (*optfn)(conn_t *, boolean_t, ipaddr_t, ipaddr_t, uint_t *, mcast_record_t, ipaddr_t, mblk_t *); switch (name) { case IP_ADD_MEMBERSHIP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_JOIN_GROUP: fmode = MODE_IS_EXCLUDE; optfn = ip_opt_add_group; break; case IP_DROP_MEMBERSHIP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_LEAVE_GROUP: fmode = MODE_IS_INCLUDE; optfn = ip_opt_delete_group; break; } if (mcast_opt) { greqp = (struct group_req *)i1; sin = (struct sockaddr_in *)&greqp->gr_group; if (sin->sin_family != AF_INET) { *outlenp = 0; return (ENOPROTOOPT); } group = (ipaddr_t)sin->sin_addr.s_addr; ifaddr = INADDR_ANY; ifindexp = &greqp->gr_interface; } else { mreqp = (struct ip_mreq *)i1; group = (ipaddr_t)mreqp->imr_multiaddr.s_addr; ifaddr = (ipaddr_t)mreqp->imr_interface.s_addr; ifindexp = NULL; } /* * In the multirouting case, we need to replicate * the request on all interfaces that will take part * in replication. We do so because multirouting is * reflective, thus we will probably receive multi- * casts on those interfaces. * The ip_multirt_apply_membership() succeeds if the * operation succeeds on at least one interface. */ ire = ire_ftable_lookup(group, IP_HOST_MASK, 0, IRE_HOST, NULL, NULL, ALL_ZONES, 0, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE); if (ire != NULL) { if (ire->ire_flags & RTF_MULTIRT) { error = ip_multirt_apply_membership( optfn, ire, connp, checkonly, group, fmode, INADDR_ANY, first_mp); done = B_TRUE; } ire_refrele(ire); } if (!done) { error = optfn(connp, checkonly, group, ifaddr, ifindexp, fmode, INADDR_ANY, first_mp); } if (error) { /* * EINPROGRESS is a soft error, needs retry * so don't make *outlenp zero. */ if (error != EINPROGRESS) *outlenp = 0; return (error); } /* OK return - copy input buffer into output buffer */ if (invalp != outvalp) { /* don't trust bcopy for identical src/dst */ bcopy(invalp, outvalp, inlen); } *outlenp = inlen; return (0); } case IP_BLOCK_SOURCE: case IP_UNBLOCK_SOURCE: case IP_ADD_SOURCE_MEMBERSHIP: case IP_DROP_SOURCE_MEMBERSHIP: case MCAST_BLOCK_SOURCE: case MCAST_UNBLOCK_SOURCE: case MCAST_JOIN_SOURCE_GROUP: case MCAST_LEAVE_SOURCE_GROUP: { struct ip_mreq_source *imreqp; struct group_source_req *gsreqp; in_addr_t grp, src, ifaddr = INADDR_ANY; uint32_t ifindex = 0; mcast_record_t fmode; struct sockaddr_in *sin; ire_t *ire; boolean_t mcast_opt = B_TRUE, done = B_FALSE; int (*optfn)(conn_t *, boolean_t, ipaddr_t, ipaddr_t, uint_t *, mcast_record_t, ipaddr_t, mblk_t *); switch (name) { case IP_BLOCK_SOURCE: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_BLOCK_SOURCE: fmode = MODE_IS_EXCLUDE; optfn = ip_opt_add_group; break; case IP_UNBLOCK_SOURCE: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_UNBLOCK_SOURCE: fmode = MODE_IS_EXCLUDE; optfn = ip_opt_delete_group; break; case IP_ADD_SOURCE_MEMBERSHIP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_JOIN_SOURCE_GROUP: fmode = MODE_IS_INCLUDE; optfn = ip_opt_add_group; break; case IP_DROP_SOURCE_MEMBERSHIP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_LEAVE_SOURCE_GROUP: fmode = MODE_IS_INCLUDE; optfn = ip_opt_delete_group; break; } if (mcast_opt) { gsreqp = (struct group_source_req *)i1; if (gsreqp->gsr_group.ss_family != AF_INET) { *outlenp = 0; return (ENOPROTOOPT); } sin = (struct sockaddr_in *)&gsreqp->gsr_group; grp = (ipaddr_t)sin->sin_addr.s_addr; sin = (struct sockaddr_in *)&gsreqp->gsr_source; src = (ipaddr_t)sin->sin_addr.s_addr; ifindex = gsreqp->gsr_interface; } else { imreqp = (struct ip_mreq_source *)i1; grp = (ipaddr_t)imreqp->imr_multiaddr.s_addr; src = (ipaddr_t)imreqp->imr_sourceaddr.s_addr; ifaddr = (ipaddr_t)imreqp->imr_interface.s_addr; } /* * In the multirouting case, we need to replicate * the request as noted in the mcast cases above. */ ire = ire_ftable_lookup(grp, IP_HOST_MASK, 0, IRE_HOST, NULL, NULL, ALL_ZONES, 0, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE); if (ire != NULL) { if (ire->ire_flags & RTF_MULTIRT) { error = ip_multirt_apply_membership( optfn, ire, connp, checkonly, grp, fmode, src, first_mp); done = B_TRUE; } ire_refrele(ire); } if (!done) { error = optfn(connp, checkonly, grp, ifaddr, &ifindex, fmode, src, first_mp); } if (error != 0) { /* * EINPROGRESS is a soft error, needs retry * so don't make *outlenp zero. */ if (error != EINPROGRESS) *outlenp = 0; return (error); } /* OK return - copy input buffer into output buffer */ if (invalp != outvalp) { bcopy(invalp, outvalp, inlen); } *outlenp = inlen; return (0); } case IP_SEC_OPT: error = ipsec_set_req(cr, connp, (ipsec_req_t *)invalp); if (error != 0) { *outlenp = 0; return (error); } break; case IP_HDRINCL: case IP_OPTIONS: case T_IP_OPTIONS: case IP_TOS: case T_IP_TOS: case IP_TTL: case IP_RECVDSTADDR: case IP_RECVOPTS: /* OK return - copy input buffer into output buffer */ if (invalp != outvalp) { /* don't trust bcopy for identical src/dst */ bcopy(invalp, outvalp, inlen); } *outlenp = inlen; return (0); case IP_RECVIF: /* Retrieve the inbound interface index */ if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_recvif = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IP_RECVSLLA: /* Retrieve the source link layer address */ if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_recvslla = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case MRT_INIT: case MRT_DONE: case MRT_ADD_VIF: case MRT_DEL_VIF: case MRT_ADD_MFC: case MRT_DEL_MFC: case MRT_ASSERT: if ((error = secpolicy_net_config(cr, B_FALSE)) != 0) { *outlenp = 0; return (error); } error = ip_mrouter_set((int)name, q, checkonly, (uchar_t *)invalp, inlen, first_mp); if (error) { *outlenp = 0; return (error); } /* OK return - copy input buffer into output buffer */ if (invalp != outvalp) { /* don't trust bcopy for identical src/dst */ bcopy(invalp, outvalp, inlen); } *outlenp = inlen; return (0); case IP_BOUND_IF: case IP_XMIT_IF: error = ip_opt_set_ill(connp, *i1, B_FALSE, checkonly, level, name, first_mp); if (error != 0) return (error); break; /* goto sizeof (int) option return */ case IP_UNSPEC_SRC: /* Allow sending with a zero source address */ if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_unspec_src = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ default: /* * "soft" error (negative) * option not handled at this level * Note: Do not modify *outlenp */ return (-EINVAL); } break; case IPPROTO_IPV6: switch (name) { case IPV6_BOUND_IF: case IPV6_BOUND_PIF: case IPV6_DONTFAILOVER_IF: error = ip_opt_set_ill(connp, *i1, B_TRUE, checkonly, level, name, first_mp); if (error != 0) return (error); break; /* goto sizeof (int) option return */ case IPV6_MULTICAST_IF: /* * The only possible errors are EINPROGRESS and * EINVAL. EINPROGRESS will be restarted and is not * a hard error. We call this option on both V4 and V6 * If both return EINVAL, then this call returns * EINVAL. If at least one of them succeeds we * return success. */ found = B_FALSE; error = ip_opt_set_ill(connp, *i1, B_TRUE, checkonly, level, name, first_mp); if (error == EINPROGRESS) return (error); if (error == 0) found = B_TRUE; error = ip_opt_set_ill(connp, *i1, B_FALSE, checkonly, IPPROTO_IP, IP_MULTICAST_IF, first_mp); if (error == 0) found = B_TRUE; if (!found) return (error); break; /* goto sizeof (int) option return */ case IPV6_MULTICAST_HOPS: /* Recorded in transport above IP */ break; /* goto sizeof (int) option return */ case IPV6_MULTICAST_LOOP: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_multicast_loop = *i1; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_JOIN_GROUP: case MCAST_JOIN_GROUP: case IPV6_LEAVE_GROUP: case MCAST_LEAVE_GROUP: { struct ipv6_mreq *ip_mreqp; struct group_req *greqp; ire_t *ire; boolean_t done = B_FALSE; in6_addr_t groupv6; uint32_t ifindex; boolean_t mcast_opt = B_TRUE; mcast_record_t fmode; int (*optfn)(conn_t *, boolean_t, const in6_addr_t *, int, mcast_record_t, const in6_addr_t *, mblk_t *); switch (name) { case IPV6_JOIN_GROUP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_JOIN_GROUP: fmode = MODE_IS_EXCLUDE; optfn = ip_opt_add_group_v6; break; case IPV6_LEAVE_GROUP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_LEAVE_GROUP: fmode = MODE_IS_INCLUDE; optfn = ip_opt_delete_group_v6; break; } if (mcast_opt) { struct sockaddr_in *sin; struct sockaddr_in6 *sin6; greqp = (struct group_req *)i1; if (greqp->gr_group.ss_family == AF_INET) { sin = (struct sockaddr_in *) &(greqp->gr_group); IN6_INADDR_TO_V4MAPPED(&sin->sin_addr, &groupv6); } else { sin6 = (struct sockaddr_in6 *) &(greqp->gr_group); groupv6 = sin6->sin6_addr; } ifindex = greqp->gr_interface; } else { ip_mreqp = (struct ipv6_mreq *)i1; groupv6 = ip_mreqp->ipv6mr_multiaddr; ifindex = ip_mreqp->ipv6mr_interface; } /* * In the multirouting case, we need to replicate * the request on all interfaces that will take part * in replication. We do so because multirouting is * reflective, thus we will probably receive multi- * casts on those interfaces. * The ip_multirt_apply_membership_v6() succeeds if * the operation succeeds on at least one interface. */ ire = ire_ftable_lookup_v6(&groupv6, &ipv6_all_ones, 0, IRE_HOST, NULL, NULL, ALL_ZONES, 0, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE); if (ire != NULL) { if (ire->ire_flags & RTF_MULTIRT) { error = ip_multirt_apply_membership_v6( optfn, ire, connp, checkonly, &groupv6, fmode, &ipv6_all_zeros, first_mp); done = B_TRUE; } ire_refrele(ire); } if (!done) { error = optfn(connp, checkonly, &groupv6, ifindex, fmode, &ipv6_all_zeros, first_mp); } if (error) { /* * EINPROGRESS is a soft error, needs retry * so don't make *outlenp zero. */ if (error != EINPROGRESS) *outlenp = 0; return (error); } /* OK return - copy input buffer into output buffer */ if (invalp != outvalp) { /* don't trust bcopy for identical src/dst */ bcopy(invalp, outvalp, inlen); } *outlenp = inlen; return (0); } case MCAST_BLOCK_SOURCE: case MCAST_UNBLOCK_SOURCE: case MCAST_JOIN_SOURCE_GROUP: case MCAST_LEAVE_SOURCE_GROUP: { struct group_source_req *gsreqp; in6_addr_t v6grp, v6src; uint32_t ifindex; mcast_record_t fmode; ire_t *ire; boolean_t done = B_FALSE; int (*optfn)(conn_t *, boolean_t, const in6_addr_t *, int, mcast_record_t, const in6_addr_t *, mblk_t *); switch (name) { case MCAST_BLOCK_SOURCE: fmode = MODE_IS_EXCLUDE; optfn = ip_opt_add_group_v6; break; case MCAST_UNBLOCK_SOURCE: fmode = MODE_IS_EXCLUDE; optfn = ip_opt_delete_group_v6; break; case MCAST_JOIN_SOURCE_GROUP: fmode = MODE_IS_INCLUDE; optfn = ip_opt_add_group_v6; break; case MCAST_LEAVE_SOURCE_GROUP: fmode = MODE_IS_INCLUDE; optfn = ip_opt_delete_group_v6; break; } gsreqp = (struct group_source_req *)i1; ifindex = gsreqp->gsr_interface; if (gsreqp->gsr_group.ss_family == AF_INET) { struct sockaddr_in *s; s = (struct sockaddr_in *)&gsreqp->gsr_group; IN6_INADDR_TO_V4MAPPED(&s->sin_addr, &v6grp); s = (struct sockaddr_in *)&gsreqp->gsr_source; IN6_INADDR_TO_V4MAPPED(&s->sin_addr, &v6src); } else { struct sockaddr_in6 *s6; s6 = (struct sockaddr_in6 *)&gsreqp->gsr_group; v6grp = s6->sin6_addr; s6 = (struct sockaddr_in6 *)&gsreqp->gsr_source; v6src = s6->sin6_addr; } /* * In the multirouting case, we need to replicate * the request as noted in the mcast cases above. */ ire = ire_ftable_lookup_v6(&v6grp, &ipv6_all_ones, 0, IRE_HOST, NULL, NULL, ALL_ZONES, 0, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE); if (ire != NULL) { if (ire->ire_flags & RTF_MULTIRT) { error = ip_multirt_apply_membership_v6( optfn, ire, connp, checkonly, &v6grp, fmode, &v6src, first_mp); done = B_TRUE; } ire_refrele(ire); } if (!done) { error = optfn(connp, checkonly, &v6grp, ifindex, fmode, &v6src, first_mp); } if (error != 0) { /* * EINPROGRESS is a soft error, needs retry * so don't make *outlenp zero. */ if (error != EINPROGRESS) *outlenp = 0; return (error); } /* OK return - copy input buffer into output buffer */ if (invalp != outvalp) { bcopy(invalp, outvalp, inlen); } *outlenp = inlen; return (0); } case IPV6_UNICAST_HOPS: /* Recorded in transport above IP */ break; /* goto sizeof (int) option return */ case IPV6_UNSPEC_SRC: /* Allow sending with a zero source address */ if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_unspec_src = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_RECVPKTINFO: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvpktinfo = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_RECVTCLASS: if (!checkonly) { if (*i1 < 0 || *i1 > 1) { return (EINVAL); } mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvtclass = *i1; mutex_exit(&connp->conn_lock); } break; case IPV6_RECVPATHMTU: if (!checkonly) { if (*i1 < 0 || *i1 > 1) { return (EINVAL); } mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvpathmtu = *i1; mutex_exit(&connp->conn_lock); } break; case IPV6_RECVHOPLIMIT: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvhoplimit = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_RECVHOPOPTS: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvhopopts = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_RECVDSTOPTS: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvdstopts = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_RECVRTHDR: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvrthdr = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_RECVRTHDRDSTOPTS: if (!checkonly) { mutex_enter(&connp->conn_lock); connp->conn_ipv6_recvrtdstopts = *i1 ? 1 : 0; mutex_exit(&connp->conn_lock); } break; /* goto sizeof (int) option return */ case IPV6_PKTINFO: if (inlen == 0) return (-EINVAL); /* clearing option */ error = ip6_set_pktinfo(cr, connp, (struct in6_pktinfo *)invalp, first_mp); if (error != 0) *outlenp = 0; else *outlenp = inlen; return (error); case IPV6_NEXTHOP: { struct sockaddr_in6 *sin6; /* Verify that the nexthop is reachable */ if (inlen == 0) return (-EINVAL); /* clearing option */ sin6 = (struct sockaddr_in6 *)invalp; ire = ire_route_lookup_v6(&sin6->sin6_addr, 0, 0, 0, NULL, NULL, connp->conn_zoneid, NULL, MATCH_IRE_DEFAULT); if (ire == NULL) { *outlenp = 0; return (EHOSTUNREACH); } ire_refrele(ire); return (-EINVAL); } case IPV6_SEC_OPT: error = ipsec_set_req(cr, connp, (ipsec_req_t *)invalp); if (error != 0) { *outlenp = 0; return (error); } break; case IPV6_SRC_PREFERENCES: { /* * This is implemented strictly in the ip module * (here and in tcp_opt_*() to accomodate tcp * sockets). Modules above ip pass this option * down here since ip is the only one that needs to * be aware of source address preferences. * * This socket option only affects connected * sockets that haven't already bound to a specific * IPv6 address. In other words, sockets that * don't call bind() with an address other than the * unspecified address and that call connect(). * ip_bind_connected_v6() passes these preferences * to the ipif_select_source_v6() function. */ if (inlen != sizeof (uint32_t)) return (EINVAL); error = ip6_set_src_preferences(connp, *(uint32_t *)invalp); if (error != 0) { *outlenp = 0; return (error); } else { *outlenp = sizeof (uint32_t); } break; } case IPV6_V6ONLY: if (*i1 < 0 || *i1 > 1) { return (EINVAL); } mutex_enter(&connp->conn_lock); connp->conn_ipv6_v6only = *i1; mutex_exit(&connp->conn_lock); break; default: return (-EINVAL); } break; default: /* * "soft" error (negative) * option not handled at this level * Note: Do not modify *outlenp */ return (-EINVAL); } /* * Common case of return from an option that is sizeof (int) */ *(int *)outvalp = *i1; *outlenp = sizeof (int); return (0); } /* * This routine gets default values of certain options whose default * values are maintained by protocol specific code */ /* ARGSUSED */ int ip_opt_default(queue_t *q, int level, int name, uchar_t *ptr) { int *i1 = (int *)ptr; switch (level) { case IPPROTO_IP: switch (name) { case IP_MULTICAST_TTL: *ptr = (uchar_t)IP_DEFAULT_MULTICAST_TTL; return (sizeof (uchar_t)); case IP_MULTICAST_LOOP: *ptr = (uchar_t)IP_DEFAULT_MULTICAST_LOOP; return (sizeof (uchar_t)); default: return (-1); } case IPPROTO_IPV6: switch (name) { case IPV6_UNICAST_HOPS: *i1 = ipv6_def_hops; return (sizeof (int)); case IPV6_MULTICAST_HOPS: *i1 = IP_DEFAULT_MULTICAST_TTL; return (sizeof (int)); case IPV6_MULTICAST_LOOP: *i1 = IP_DEFAULT_MULTICAST_LOOP; return (sizeof (int)); case IPV6_V6ONLY: *i1 = 1; return (sizeof (int)); default: return (-1); } default: return (-1); } /* NOTREACHED */ } /* * Given a destination address and a pointer to where to put the information * this routine fills in the mtuinfo. */ int ip_fill_mtuinfo(struct in6_addr *in6, in_port_t port, struct ip6_mtuinfo *mtuinfo) { ire_t *ire; if (IN6_IS_ADDR_UNSPECIFIED(in6)) return (-1); bzero(mtuinfo, sizeof (*mtuinfo)); mtuinfo->ip6m_addr.sin6_family = AF_INET6; mtuinfo->ip6m_addr.sin6_port = port; mtuinfo->ip6m_addr.sin6_addr = *in6; ire = ire_cache_lookup_v6(in6, ALL_ZONES, NULL); if (ire != NULL) { mtuinfo->ip6m_mtu = ire->ire_max_frag; ire_refrele(ire); } else { mtuinfo->ip6m_mtu = IPV6_MIN_MTU; } return (sizeof (struct ip6_mtuinfo)); } /* * This routine gets socket options. For MRT_VERSION and MRT_ASSERT, error * checking of GET_QUEUE_CRED(q) and that ip_g_mrouter is set should be done and * isn't. This doesn't matter as the error checking is done properly for the * other MRT options coming in through ip_opt_set. */ int ip_opt_get(queue_t *q, int level, int name, uchar_t *ptr) { conn_t *connp = Q_TO_CONN(q); ipsec_req_t *req = (ipsec_req_t *)ptr; switch (level) { case IPPROTO_IP: switch (name) { case MRT_VERSION: case MRT_ASSERT: (void) ip_mrouter_get(name, q, ptr); return (sizeof (int)); case IP_SEC_OPT: return (ipsec_req_from_conn(connp, req, IPSEC_AF_V4)); case IP_NEXTHOP: if (connp->conn_nexthop_set) { *(ipaddr_t *)ptr = connp->conn_nexthop_v4; return (sizeof (ipaddr_t)); } else return (0); default: break; } break; case IPPROTO_IPV6: switch (name) { case IPV6_SEC_OPT: return (ipsec_req_from_conn(connp, req, IPSEC_AF_V6)); case IPV6_SRC_PREFERENCES: { return (ip6_get_src_preferences(connp, (uint32_t *)ptr)); } case IPV6_V6ONLY: *(int *)ptr = connp->conn_ipv6_v6only ? 1 : 0; return (sizeof (int)); case IPV6_PATHMTU: return (ip_fill_mtuinfo(&connp->conn_remv6, 0, (struct ip6_mtuinfo *)ptr)); default: break; } break; default: break; } return (-1); } /* Named Dispatch routine to get a current value out of our parameter table. */ /* ARGSUSED */ static int ip_param_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *ioc_cr) { ipparam_t *ippa = (ipparam_t *)cp; (void) mi_mpprintf(mp, "%d", ippa->ip_param_value); return (0); } /* ARGSUSED */ static int ip_param_generic_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *ioc_cr) { (void) mi_mpprintf(mp, "%d", *(int *)cp); return (0); } /* * Set ip{,6}_forwarding values. This means walking through all of the * ill's and toggling their forwarding values. */ /* ARGSUSED */ static int ip_forward_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *ioc_cr) { long new_value; int *forwarding_value = (int *)cp; ill_t *walker; boolean_t isv6 = (forwarding_value == &ipv6_forward); ill_walk_context_t ctx; if (ddi_strtol(value, NULL, 10, &new_value) != 0 || new_value < 0 || new_value > 1) { return (EINVAL); } *forwarding_value = new_value; /* * Regardless of the current value of ip_forwarding, set all per-ill * values of ip_forwarding to the value being set. * * Bring all the ill's up to date with the new global value. */ rw_enter(&ill_g_lock, RW_READER); if (isv6) walker = ILL_START_WALK_V6(&ctx); else walker = ILL_START_WALK_V4(&ctx); for (; walker != NULL; walker = ill_next(&ctx, walker)) { (void) ill_forward_set(q, mp, (new_value != 0), (caddr_t)walker); } rw_exit(&ill_g_lock); return (0); } /* * Walk through the param array specified registering each element with the * Named Dispatch handler. This is called only during init. So it is ok * not to acquire any locks */ static boolean_t ip_param_register(ipparam_t *ippa, size_t ippa_cnt, ipndp_t *ipnd, size_t ipnd_cnt) { for (; ippa_cnt-- > 0; ippa++) { if (ippa->ip_param_name && ippa->ip_param_name[0]) { if (!nd_load(&ip_g_nd, ippa->ip_param_name, ip_param_get, ip_param_set, (caddr_t)ippa)) { nd_free(&ip_g_nd); return (B_FALSE); } } } for (; ipnd_cnt-- > 0; ipnd++) { if (ipnd->ip_ndp_name && ipnd->ip_ndp_name[0]) { if (!nd_load(&ip_g_nd, ipnd->ip_ndp_name, ipnd->ip_ndp_getf, ipnd->ip_ndp_setf, ipnd->ip_ndp_data)) { nd_free(&ip_g_nd); return (B_FALSE); } } } return (B_TRUE); } /* Named Dispatch routine to negotiate a new value for one of our parameters. */ /* ARGSUSED */ static int ip_param_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *ioc_cr) { long new_value; ipparam_t *ippa = (ipparam_t *)cp; if (ddi_strtol(value, NULL, 10, &new_value) != 0 || new_value < ippa->ip_param_min || new_value > ippa->ip_param_max) { return (EINVAL); } ippa->ip_param_value = new_value; return (0); } /* * Handles both IPv4 and IPv6 reassembly - doing the out-of-order cases, * When an ipf is passed here for the first time, if * we already have in-order fragments on the queue, we convert from the fast- * path reassembly scheme to the hard-case scheme. From then on, additional * fragments are reassembled here. We keep track of the start and end offsets * of each piece, and the number of holes in the chain. When the hole count * goes to zero, we are done! * * The ipf_count will be updated to account for any mblk(s) added (pointed to * by mp) or subtracted (freeb()ed dups), upon return the caller must update * ipfb_count and ill_frag_count by the difference of ipf_count before and * after the call to ip_reassemble(). */ int ip_reassemble(mblk_t *mp, ipf_t *ipf, uint_t start, boolean_t more, ill_t *ill, size_t msg_len) { uint_t end; mblk_t *next_mp; mblk_t *mp1; uint_t offset; boolean_t incr_dups = B_TRUE; boolean_t offset_zero_seen = B_FALSE; boolean_t pkt_boundary_checked = B_FALSE; /* If start == 0 then ipf_nf_hdr_len has to be set. */ ASSERT(start != 0 || ipf->ipf_nf_hdr_len != 0); /* Add in byte count */ ipf->ipf_count += msg_len; if (ipf->ipf_end) { /* * We were part way through in-order reassembly, but now there * is a hole. We walk through messages already queued, and * mark them for hard case reassembly. We know that up till * now they were in order starting from offset zero. */ offset = 0; for (mp1 = ipf->ipf_mp->b_cont; mp1; mp1 = mp1->b_cont) { IP_REASS_SET_START(mp1, offset); if (offset == 0) { ASSERT(ipf->ipf_nf_hdr_len != 0); offset = -ipf->ipf_nf_hdr_len; } offset += mp1->b_wptr - mp1->b_rptr; IP_REASS_SET_END(mp1, offset); } /* One hole at the end. */ ipf->ipf_hole_cnt = 1; /* Brand it as a hard case, forever. */ ipf->ipf_end = 0; } /* Walk through all the new pieces. */ do { end = start + (mp->b_wptr - mp->b_rptr); /* * If start is 0, decrease 'end' only for the first mblk of * the fragment. Otherwise 'end' can get wrong value in the * second pass of the loop if first mblk is exactly the * size of ipf_nf_hdr_len. */ if (start == 0 && !offset_zero_seen) { /* First segment */ ASSERT(ipf->ipf_nf_hdr_len != 0); end -= ipf->ipf_nf_hdr_len; offset_zero_seen = B_TRUE; } next_mp = mp->b_cont; /* * We are checking to see if there is any interesing data * to process. If there isn't and the mblk isn't the * one which carries the unfragmentable header then we * drop it. It's possible to have just the unfragmentable * header come through without any data. That needs to be * saved. * * If the assert at the top of this function holds then the * term "ipf->ipf_nf_hdr_len != 0" isn't needed. This code * is infrequently traveled enough that the test is left in * to protect against future code changes which break that * invariant. */ if (start == end && start != 0 && ipf->ipf_nf_hdr_len != 0) { /* Empty. Blast it. */ IP_REASS_SET_START(mp, 0); IP_REASS_SET_END(mp, 0); /* * If the ipf points to the mblk we are about to free, * update ipf to point to the next mblk (or NULL * if none). */ if (ipf->ipf_mp->b_cont == mp) ipf->ipf_mp->b_cont = next_mp; freeb(mp); continue; } mp->b_cont = NULL; IP_REASS_SET_START(mp, start); IP_REASS_SET_END(mp, end); if (!ipf->ipf_tail_mp) { ipf->ipf_tail_mp = mp; ipf->ipf_mp->b_cont = mp; if (start == 0 || !more) { ipf->ipf_hole_cnt = 1; /* * if the first fragment comes in more than one * mblk, this loop will be executed for each * mblk. Need to adjust hole count so exiting * this routine will leave hole count at 1. */ if (next_mp) ipf->ipf_hole_cnt++; } else ipf->ipf_hole_cnt = 2; continue; } else if (ipf->ipf_last_frag_seen && !more && !pkt_boundary_checked) { /* * We check datagram boundary only if this fragment * claims to be the last fragment and we have seen a * last fragment in the past too. We do this only * once for a given fragment. * * start cannot be 0 here as fragments with start=0 * and MF=0 gets handled as a complete packet. These * fragments should not reach here. */ if (start + msgdsize(mp) != IP_REASS_END(ipf->ipf_tail_mp)) { /* * We have two fragments both of which claim * to be the last fragment but gives conflicting * information about the whole datagram size. * Something fishy is going on. Drop the * fragment and free up the reassembly list. */ return (IP_REASS_FAILED); } /* * We shouldn't come to this code block again for this * particular fragment. */ pkt_boundary_checked = B_TRUE; } /* New stuff at or beyond tail? */ offset = IP_REASS_END(ipf->ipf_tail_mp); if (start >= offset) { if (ipf->ipf_last_frag_seen) { /* current fragment is beyond last fragment */ return (IP_REASS_FAILED); } /* Link it on end. */ ipf->ipf_tail_mp->b_cont = mp; ipf->ipf_tail_mp = mp; if (more) { if (start != offset) ipf->ipf_hole_cnt++; } else if (start == offset && next_mp == NULL) ipf->ipf_hole_cnt--; continue; } mp1 = ipf->ipf_mp->b_cont; offset = IP_REASS_START(mp1); /* New stuff at the front? */ if (start < offset) { if (start == 0) { if (end >= offset) { /* Nailed the hole at the begining. */ ipf->ipf_hole_cnt--; } } else if (end < offset) { /* * A hole, stuff, and a hole where there used * to be just a hole. */ ipf->ipf_hole_cnt++; } mp->b_cont = mp1; /* Check for overlap. */ while (end > offset) { if (end < IP_REASS_END(mp1)) { mp->b_wptr -= end - offset; IP_REASS_SET_END(mp, offset); if (ill->ill_isv6) { BUMP_MIB(ill->ill_ip6_mib, ipv6ReasmPartDups); } else { BUMP_MIB(&ip_mib, ipReasmPartDups); } break; } /* Did we cover another hole? */ if ((mp1->b_cont && IP_REASS_END(mp1) != IP_REASS_START(mp1->b_cont) && end >= IP_REASS_START(mp1->b_cont)) || (!ipf->ipf_last_frag_seen && !more)) { ipf->ipf_hole_cnt--; } /* Clip out mp1. */ if ((mp->b_cont = mp1->b_cont) == NULL) { /* * After clipping out mp1, this guy * is now hanging off the end. */ ipf->ipf_tail_mp = mp; } IP_REASS_SET_START(mp1, 0); IP_REASS_SET_END(mp1, 0); /* Subtract byte count */ ipf->ipf_count -= mp1->b_datap->db_lim - mp1->b_datap->db_base; freeb(mp1); if (ill->ill_isv6) { BUMP_MIB(ill->ill_ip6_mib, ipv6ReasmPartDups); } else { BUMP_MIB(&ip_mib, ipReasmPartDups); } mp1 = mp->b_cont; if (!mp1) break; offset = IP_REASS_START(mp1); } ipf->ipf_mp->b_cont = mp; continue; } /* * The new piece starts somewhere between the start of the head * and before the end of the tail. */ for (; mp1; mp1 = mp1->b_cont) { offset = IP_REASS_END(mp1); if (start < offset) { if (end <= offset) { /* Nothing new. */ IP_REASS_SET_START(mp, 0); IP_REASS_SET_END(mp, 0); /* Subtract byte count */ ipf->ipf_count -= mp->b_datap->db_lim - mp->b_datap->db_base; if (incr_dups) { ipf->ipf_num_dups++; incr_dups = B_FALSE; } freeb(mp); if (ill->ill_isv6) { BUMP_MIB(ill->ill_ip6_mib, ipv6ReasmDuplicates); } else { BUMP_MIB(&ip_mib, ipReasmDuplicates); } break; } /* * Trim redundant stuff off beginning of new * piece. */ IP_REASS_SET_START(mp, offset); mp->b_rptr += offset - start; if (ill->ill_isv6) { BUMP_MIB(ill->ill_ip6_mib, ipv6ReasmPartDups); } else { BUMP_MIB(&ip_mib, ipReasmPartDups); } start = offset; if (!mp1->b_cont) { /* * After trimming, this guy is now * hanging off the end. */ mp1->b_cont = mp; ipf->ipf_tail_mp = mp; if (!more) { ipf->ipf_hole_cnt--; } break; } } if (start >= IP_REASS_START(mp1->b_cont)) continue; /* Fill a hole */ if (start > offset) ipf->ipf_hole_cnt++; mp->b_cont = mp1->b_cont; mp1->b_cont = mp; mp1 = mp->b_cont; offset = IP_REASS_START(mp1); if (end >= offset) { ipf->ipf_hole_cnt--; /* Check for overlap. */ while (end > offset) { if (end < IP_REASS_END(mp1)) { mp->b_wptr -= end - offset; IP_REASS_SET_END(mp, offset); /* * TODO we might bump * this up twice if there is * overlap at both ends. */ if (ill->ill_isv6) { BUMP_MIB( ill->ill_ip6_mib, ipv6ReasmPartDups); } else { BUMP_MIB(&ip_mib, ipReasmPartDups); } break; } /* Did we cover another hole? */ if ((mp1->b_cont && IP_REASS_END(mp1) != IP_REASS_START(mp1->b_cont) && end >= IP_REASS_START(mp1->b_cont)) || (!ipf->ipf_last_frag_seen && !more)) { ipf->ipf_hole_cnt--; } /* Clip out mp1. */ if ((mp->b_cont = mp1->b_cont) == NULL) { /* * After clipping out mp1, * this guy is now hanging * off the end. */ ipf->ipf_tail_mp = mp; } IP_REASS_SET_START(mp1, 0); IP_REASS_SET_END(mp1, 0); /* Subtract byte count */ ipf->ipf_count -= mp1->b_datap->db_lim - mp1->b_datap->db_base; freeb(mp1); if (ill->ill_isv6) { BUMP_MIB(ill->ill_ip6_mib, ipv6ReasmPartDups); } else { BUMP_MIB(&ip_mib, ipReasmPartDups); } mp1 = mp->b_cont; if (!mp1) break; offset = IP_REASS_START(mp1); } } break; } } while (start = end, mp = next_mp); /* Fragment just processed could be the last one. Remember this fact */ if (!more) ipf->ipf_last_frag_seen = B_TRUE; /* Still got holes? */ if (ipf->ipf_hole_cnt) return (IP_REASS_PARTIAL); /* Clean up overloaded fields to avoid upstream disasters. */ for (mp1 = ipf->ipf_mp->b_cont; mp1; mp1 = mp1->b_cont) { IP_REASS_SET_START(mp1, 0); IP_REASS_SET_END(mp1, 0); } return (IP_REASS_COMPLETE); } /* * ipsec processing for the fast path, used for input UDP Packets */ static boolean_t ip_udp_check(queue_t *q, conn_t *connp, ill_t *ill, ipha_t *ipha, mblk_t **mpp, mblk_t **first_mpp, boolean_t mctl_present) { uint32_t ill_index; uint_t in_flags; /* IPF_RECVSLLA and/or IPF_RECVIF */ ASSERT(ipha->ipha_protocol == IPPROTO_UDP); /* The ill_index of the incoming ILL */ ill_index = ((ill_t *)q->q_ptr)->ill_phyint->phyint_ifindex; /* pass packet up to the transport */ if (CONN_INBOUND_POLICY_PRESENT(connp) || mctl_present) { *first_mpp = ipsec_check_inbound_policy(*first_mpp, connp, ipha, NULL, mctl_present); if (*first_mpp == NULL) { return (B_FALSE); } } /* Initiate IPPF processing for fastpath UDP */ if (IPP_ENABLED(IPP_LOCAL_IN)) { ip_process(IPP_LOCAL_IN, mpp, ill_index); if (*mpp == NULL) { ip2dbg(("ip_input_ipsec_process: UDP pkt " "deferred/dropped during IPPF processing\n")); return (B_FALSE); } } /* * We make the checks as below since we are in the fast path * and want to minimize the number of checks if the IP_RECVIF and/or * IP_RECVSLLA and/or IPV6_RECVPKTINFO options are not set */ if (connp->conn_recvif || connp->conn_recvslla || connp->conn_ipv6_recvpktinfo) { if (connp->conn_recvif || connp->conn_ipv6_recvpktinfo) { in_flags = IPF_RECVIF; } if (connp->conn_recvslla) { in_flags |= IPF_RECVSLLA; } /* * since in_flags are being set ill will be * referenced in ip_add_info, so it better not * be NULL. */ /* * the actual data will be contained in b_cont * upon successful return of the following call. * If the call fails then the original mblk is * returned. */ *mpp = ip_add_info(*mpp, ill, in_flags); } return (B_TRUE); } /* * Fragmentation reassembly. Each ILL has a hash table for * queuing packets undergoing reassembly for all IPIFs * associated with the ILL. The hash is based on the packet * IP ident field. The ILL frag hash table was allocated * as a timer block at the time the ILL was created. Whenever * there is anything on the reassembly queue, the timer will * be running. Returns B_TRUE if successful else B_FALSE; * frees mp on failure. */ static boolean_t ip_rput_fragment(queue_t *q, mblk_t **mpp, ipha_t *ipha, uint32_t *cksum_val, uint16_t *cksum_flags) { uint32_t frag_offset_flags; ill_t *ill = (ill_t *)q->q_ptr; mblk_t *mp = *mpp; mblk_t *t_mp; ipaddr_t dst; uint8_t proto = ipha->ipha_protocol; uint32_t sum_val; uint16_t sum_flags; ipf_t *ipf; ipf_t **ipfp; ipfb_t *ipfb; uint16_t ident; uint32_t offset; ipaddr_t src; uint_t hdr_length; uint32_t end; mblk_t *mp1; mblk_t *tail_mp; size_t count; size_t msg_len; uint8_t ecn_info = 0; uint32_t packet_size; boolean_t pruned = B_FALSE; if (cksum_val != NULL) *cksum_val = 0; if (cksum_flags != NULL) *cksum_flags = 0; /* * Drop the fragmented as early as possible, if * we don't have resource(s) to re-assemble. */ if (ip_reass_queue_bytes == 0) { freemsg(mp); return (B_FALSE); } /* Check for fragmentation offset; return if there's none */ if ((frag_offset_flags = ntohs(ipha->ipha_fragment_offset_and_flags) & (IPH_MF | IPH_OFFSET)) == 0) return (B_TRUE); /* * We utilize hardware computed checksum info only for UDP since * IP fragmentation is a normal occurence for the protocol. In * addition, checksum offload support for IP fragments carrying * UDP payload is commonly implemented across network adapters. */ ASSERT(ill != NULL); if (proto == IPPROTO_UDP && dohwcksum && ILL_HCKSUM_CAPABLE(ill) && (DB_CKSUMFLAGS(mp) & (HCK_FULLCKSUM | HCK_PARTIALCKSUM))) { mblk_t *mp1 = mp->b_cont; int32_t len; /* Record checksum information from the packet */ sum_val = (uint32_t)DB_CKSUM16(mp); sum_flags = DB_CKSUMFLAGS(mp); /* IP payload offset from beginning of mblk */ offset = ((uchar_t *)ipha + IPH_HDR_LENGTH(ipha)) - mp->b_rptr; if ((sum_flags & HCK_PARTIALCKSUM) && (mp1 == NULL || mp1->b_cont == NULL) && offset >= DB_CKSUMSTART(mp) && ((len = offset - DB_CKSUMSTART(mp)) & 1) == 0) { uint32_t adj; /* * Partial checksum has been calculated by hardware * and attached to the packet; in addition, any * prepended extraneous data is even byte aligned. * If any such data exists, we adjust the checksum; * this would also handle any postpended data. */ IP_ADJCKSUM_PARTIAL(mp->b_rptr + DB_CKSUMSTART(mp), mp, mp1, len, adj); /* One's complement subtract extraneous checksum */ if (adj >= sum_val) sum_val = ~(adj - sum_val) & 0xFFFF; else sum_val -= adj; } } else { sum_val = 0; sum_flags = 0; } /* Clear hardware checksumming flag */ DB_CKSUMFLAGS(mp) = 0; ident = ipha->ipha_ident; offset = (frag_offset_flags << 3) & 0xFFFF; src = ipha->ipha_src; dst = ipha->ipha_dst; hdr_length = IPH_HDR_LENGTH(ipha); end = ntohs(ipha->ipha_length) - hdr_length; /* If end == 0 then we have a packet with no data, so just free it */ if (end == 0) { freemsg(mp); return (B_FALSE); } /* Record the ECN field info. */ ecn_info = (ipha->ipha_type_of_service & 0x3); if (offset != 0) { /* * If this isn't the first piece, strip the header, and * add the offset to the end value. */ mp->b_rptr += hdr_length; end += offset; } msg_len = MBLKSIZE(mp); tail_mp = mp; while (tail_mp->b_cont != NULL) { tail_mp = tail_mp->b_cont; msg_len += MBLKSIZE(tail_mp); } /* If the reassembly list for this ILL will get too big, prune it */ if ((msg_len + sizeof (*ipf) + ill->ill_frag_count) >= ip_reass_queue_bytes) { ill_frag_prune(ill, (ip_reass_queue_bytes < msg_len) ? 0 : (ip_reass_queue_bytes - msg_len)); pruned = B_TRUE; } ipfb = &ill->ill_frag_hash_tbl[ILL_FRAG_HASH(src, ident)]; mutex_enter(&ipfb->ipfb_lock); ipfp = &ipfb->ipfb_ipf; /* Try to find an existing fragment queue for this packet. */ for (;;) { ipf = ipfp[0]; if (ipf != NULL) { /* * It has to match on ident and src/dst address. */ if (ipf->ipf_ident == ident && ipf->ipf_src == src && ipf->ipf_dst == dst && ipf->ipf_protocol == proto) { /* * If we have received too many * duplicate fragments for this packet * free it. */ if (ipf->ipf_num_dups > ip_max_frag_dups) { ill_frag_free_pkts(ill, ipfb, ipf, 1); freemsg(mp); mutex_exit(&ipfb->ipfb_lock); return (B_FALSE); } /* Found it. */ break; } ipfp = &ipf->ipf_hash_next; continue; } /* * If we pruned the list, do we want to store this new * fragment?. We apply an optimization here based on the * fact that most fragments will be received in order. * So if the offset of this incoming fragment is zero, * it is the first fragment of a new packet. We will * keep it. Otherwise drop the fragment, as we have * probably pruned the packet already (since the * packet cannot be found). */ if (pruned && offset != 0) { mutex_exit(&ipfb->ipfb_lock); freemsg(mp); return (B_FALSE); } if (ipfb->ipfb_frag_pkts >= MAX_FRAG_PKTS) { /* * Too many fragmented packets in this hash * bucket. Free the oldest. */ ill_frag_free_pkts(ill, ipfb, ipfb->ipfb_ipf, 1); } /* New guy. Allocate a frag message. */ mp1 = allocb(sizeof (*ipf), BPRI_MED); if (mp1 == NULL) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); reass_done: mutex_exit(&ipfb->ipfb_lock); return (B_FALSE); } BUMP_MIB(&ip_mib, ipReasmReqds); mp1->b_cont = mp; /* Initialize the fragment header. */ ipf = (ipf_t *)mp1->b_rptr; ipf->ipf_mp = mp1; ipf->ipf_ptphn = ipfp; ipfp[0] = ipf; ipf->ipf_hash_next = NULL; ipf->ipf_ident = ident; ipf->ipf_protocol = proto; ipf->ipf_src = src; ipf->ipf_dst = dst; ipf->ipf_nf_hdr_len = 0; /* Record reassembly start time. */ ipf->ipf_timestamp = gethrestime_sec(); /* Record ipf generation and account for frag header */ ipf->ipf_gen = ill->ill_ipf_gen++; ipf->ipf_count = MBLKSIZE(mp1); ipf->ipf_last_frag_seen = B_FALSE; ipf->ipf_ecn = ecn_info; ipf->ipf_num_dups = 0; ipfb->ipfb_frag_pkts++; ipf->ipf_checksum = 0; ipf->ipf_checksum_flags = 0; /* Store checksum value in fragment header */ if (sum_flags != 0) { sum_val = (sum_val & 0xFFFF) + (sum_val >> 16); sum_val = (sum_val & 0xFFFF) + (sum_val >> 16); ipf->ipf_checksum = sum_val; ipf->ipf_checksum_flags = sum_flags; } /* * We handle reassembly two ways. In the easy case, * where all the fragments show up in order, we do * minimal bookkeeping, and just clip new pieces on * the end. If we ever see a hole, then we go off * to ip_reassemble which has to mark the pieces and * keep track of the number of holes, etc. Obviously, * the point of having both mechanisms is so we can * handle the easy case as efficiently as possible. */ if (offset == 0) { /* Easy case, in-order reassembly so far. */ ipf->ipf_count += msg_len; ipf->ipf_tail_mp = tail_mp; /* * Keep track of next expected offset in * ipf_end. */ ipf->ipf_end = end; ipf->ipf_nf_hdr_len = hdr_length; } else { /* Hard case, hole at the beginning. */ ipf->ipf_tail_mp = NULL; /* * ipf_end == 0 means that we have given up * on easy reassembly. */ ipf->ipf_end = 0; /* Forget checksum offload from now on */ ipf->ipf_checksum_flags = 0; /* * ipf_hole_cnt is set by ip_reassemble. * ipf_count is updated by ip_reassemble. * No need to check for return value here * as we don't expect reassembly to complete * or fail for the first fragment itself. */ (void) ip_reassemble(mp, ipf, (frag_offset_flags & IPH_OFFSET) << 3, (frag_offset_flags & IPH_MF), ill, msg_len); } /* Update per ipfb and ill byte counts */ ipfb->ipfb_count += ipf->ipf_count; ASSERT(ipfb->ipfb_count > 0); /* Wraparound */ ill->ill_frag_count += ipf->ipf_count; ASSERT(ill->ill_frag_count > 0); /* Wraparound */ /* If the frag timer wasn't already going, start it. */ mutex_enter(&ill->ill_lock); ill_frag_timer_start(ill); mutex_exit(&ill->ill_lock); goto reass_done; } /* * If the packet's flag has changed (it could be coming up * from an interface different than the previous, therefore * possibly different checksum capability), then forget about * any stored checksum states. Otherwise add the value to * the existing one stored in the fragment header. */ if (sum_flags != 0 && sum_flags == ipf->ipf_checksum_flags) { sum_val += ipf->ipf_checksum; sum_val = (sum_val & 0xFFFF) + (sum_val >> 16); sum_val = (sum_val & 0xFFFF) + (sum_val >> 16); ipf->ipf_checksum = sum_val; } else if (ipf->ipf_checksum_flags != 0) { /* Forget checksum offload from now on */ ipf->ipf_checksum_flags = 0; } /* * We have a new piece of a datagram which is already being * reassembled. Update the ECN info if all IP fragments * are ECN capable. If there is one which is not, clear * all the info. If there is at least one which has CE * code point, IP needs to report that up to transport. */ if (ecn_info != IPH_ECN_NECT && ipf->ipf_ecn != IPH_ECN_NECT) { if (ecn_info == IPH_ECN_CE) ipf->ipf_ecn = IPH_ECN_CE; } else { ipf->ipf_ecn = IPH_ECN_NECT; } if (offset && ipf->ipf_end == offset) { /* The new fragment fits at the end */ ipf->ipf_tail_mp->b_cont = mp; /* Update the byte count */ ipf->ipf_count += msg_len; /* Update per ipfb and ill byte counts */ ipfb->ipfb_count += msg_len; ASSERT(ipfb->ipfb_count > 0); /* Wraparound */ ill->ill_frag_count += msg_len; ASSERT(ill->ill_frag_count > 0); /* Wraparound */ if (frag_offset_flags & IPH_MF) { /* More to come. */ ipf->ipf_end = end; ipf->ipf_tail_mp = tail_mp; goto reass_done; } } else { /* Go do the hard cases. */ int ret; if (offset == 0) ipf->ipf_nf_hdr_len = hdr_length; /* Save current byte count */ count = ipf->ipf_count; ret = ip_reassemble(mp, ipf, (frag_offset_flags & IPH_OFFSET) << 3, (frag_offset_flags & IPH_MF), ill, msg_len); /* Count of bytes added and subtracted (freeb()ed) */ count = ipf->ipf_count - count; if (count) { /* Update per ipfb and ill byte counts */ ipfb->ipfb_count += count; ASSERT(ipfb->ipfb_count > 0); /* Wraparound */ ill->ill_frag_count += count; ASSERT(ill->ill_frag_count > 0); } if (ret == IP_REASS_PARTIAL) { goto reass_done; } else if (ret == IP_REASS_FAILED) { /* Reassembly failed. Free up all resources */ ill_frag_free_pkts(ill, ipfb, ipf, 1); for (t_mp = mp; t_mp != NULL; t_mp = t_mp->b_cont) { IP_REASS_SET_START(t_mp, 0); IP_REASS_SET_END(t_mp, 0); } freemsg(mp); goto reass_done; } /* We will reach here iff 'ret' is IP_REASS_COMPLETE */ } /* * We have completed reassembly. Unhook the frag header from * the reassembly list. * * Before we free the frag header, record the ECN info * to report back to the transport. */ ecn_info = ipf->ipf_ecn; BUMP_MIB(&ip_mib, ipReasmOKs); ipfp = ipf->ipf_ptphn; /* We need to supply these to caller */ if ((sum_flags = ipf->ipf_checksum_flags) != 0) sum_val = ipf->ipf_checksum; else sum_val = 0; mp1 = ipf->ipf_mp; count = ipf->ipf_count; ipf = ipf->ipf_hash_next; if (ipf != NULL) ipf->ipf_ptphn = ipfp; ipfp[0] = ipf; ill->ill_frag_count -= count; ASSERT(ipfb->ipfb_count >= count); ipfb->ipfb_count -= count; ipfb->ipfb_frag_pkts--; mutex_exit(&ipfb->ipfb_lock); /* Ditch the frag header. */ mp = mp1->b_cont; freeb(mp1); /* Restore original IP length in header. */ packet_size = (uint32_t)msgdsize(mp); if (packet_size > IP_MAXPACKET) { freemsg(mp); BUMP_MIB(&ip_mib, ipInHdrErrors); return (B_FALSE); } if (DB_REF(mp) > 1) { mblk_t *mp2 = copymsg(mp); freemsg(mp); if (mp2 == NULL) { BUMP_MIB(&ip_mib, ipInDiscards); return (B_FALSE); } mp = mp2; } ipha = (ipha_t *)mp->b_rptr; ipha->ipha_length = htons((uint16_t)packet_size); /* We're now complete, zip the frag state */ ipha->ipha_fragment_offset_and_flags = 0; /* Record the ECN info. */ ipha->ipha_type_of_service &= 0xFC; ipha->ipha_type_of_service |= ecn_info; *mpp = mp; /* Reassembly is successful; return checksum information if needed */ if (cksum_val != NULL) *cksum_val = sum_val; if (cksum_flags != NULL) *cksum_flags = sum_flags; return (B_TRUE); } /* * Perform ip header check sum update local options. * return B_TRUE if all is well, else return B_FALSE and release * the mp. caller is responsible for decrementing ire ref cnt. */ static boolean_t ip_options_cksum(queue_t *q, mblk_t *mp, ipha_t *ipha, ire_t *ire) { mblk_t *first_mp; boolean_t mctl_present; uint16_t sum; EXTRACT_PKT_MP(mp, first_mp, mctl_present); /* * Don't do the checksum if it has gone through AH/ESP * processing. */ if (!mctl_present) { sum = ip_csum_hdr(ipha); if (sum != 0) { BUMP_MIB(&ip_mib, ipInCksumErrs); freemsg(first_mp); return (B_FALSE); } } if (!ip_rput_local_options(q, mp, ipha, ire)) { if (mctl_present) freeb(first_mp); return (B_FALSE); } return (B_TRUE); } /* * All udp packet are delivered to the local host via this routine. */ void ip_udp_input(queue_t *q, mblk_t *mp, ipha_t *ipha, ire_t *ire, ill_t *recv_ill) { uint32_t sum; uint32_t u1; boolean_t mctl_present; conn_t *connp; mblk_t *first_mp; uint16_t *up; ill_t *ill = (ill_t *)q->q_ptr; uint16_t reass_hck_flags = 0; #define rptr ((uchar_t *)ipha) EXTRACT_PKT_MP(mp, first_mp, mctl_present); ASSERT(!mctl_present || ipsec_in_is_secure(first_mp)); ASSERT(ipha->ipha_protocol == IPPROTO_UDP); /* * FAST PATH for udp packets */ /* u1 is # words of IP options */ u1 = ipha->ipha_version_and_hdr_length - (uchar_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS); /* IP options present */ if (u1 != 0) goto ipoptions; /* Check the IP header checksum. */ if (IS_IP_HDR_HWCKSUM(mctl_present, mp, ill)) { /* Clear the IP header h/w cksum flag */ DB_CKSUMFLAGS(mp) &= ~HCK_IPV4_HDRCKSUM; } else { #define uph ((uint16_t *)ipha) sum = uph[0] + uph[1] + uph[2] + uph[3] + uph[4] + uph[5] + uph[6] + uph[7] + uph[8] + uph[9]; #undef uph /* finish doing IP checksum */ sum = (sum & 0xFFFF) + (sum >> 16); sum = ~(sum + (sum >> 16)) & 0xFFFF; /* * Don't verify header checksum if this packet is coming * back from AH/ESP as we already did it. */ if (!mctl_present && sum != 0 && sum != 0xFFFF) { BUMP_MIB(&ip_mib, ipInCksumErrs); freemsg(first_mp); return; } } /* * Count for SNMP of inbound packets for ire. * if mctl is present this might be a secure packet and * has already been counted for in ip_proto_input(). */ if (!mctl_present) { UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; } /* packet part of fragmented IP packet? */ u1 = ntohs(ipha->ipha_fragment_offset_and_flags); if (u1 & (IPH_MF | IPH_OFFSET)) { goto fragmented; } /* u1 = IP header length (20 bytes) */ u1 = IP_SIMPLE_HDR_LENGTH; /* packet does not contain complete IP & UDP headers */ if ((mp->b_wptr - rptr) < (IP_SIMPLE_HDR_LENGTH + UDPH_SIZE)) goto udppullup; /* up points to UDP header */ up = (uint16_t *)((uchar_t *)ipha + IP_SIMPLE_HDR_LENGTH); #define iphs ((uint16_t *)ipha) /* if udp hdr cksum != 0, then need to checksum udp packet */ if (up[3] != 0) { mblk_t *mp1 = mp->b_cont; boolean_t cksum_err; uint16_t hck_flags = 0; /* Pseudo-header checksum */ u1 = IP_UDP_CSUM_COMP + iphs[6] + iphs[7] + iphs[8] + iphs[9] + up[2]; /* * Revert to software checksum calculation if the interface * isn't capable of checksum offload or if IPsec is present. */ if (ILL_HCKSUM_CAPABLE(ill) && !mctl_present && dohwcksum) hck_flags = DB_CKSUMFLAGS(mp); if ((hck_flags & (HCK_FULLCKSUM|HCK_PARTIALCKSUM)) == 0) IP_STAT(ip_in_sw_cksum); IP_CKSUM_RECV(hck_flags, u1, (uchar_t *)(rptr + DB_CKSUMSTART(mp)), (int32_t)((uchar_t *)up - rptr), mp, mp1, cksum_err); if (cksum_err) { BUMP_MIB(&ip_mib, udpInCksumErrs); if (hck_flags & HCK_FULLCKSUM) IP_STAT(ip_udp_in_full_hw_cksum_err); else if (hck_flags & HCK_PARTIALCKSUM) IP_STAT(ip_udp_in_part_hw_cksum_err); else IP_STAT(ip_udp_in_sw_cksum_err); freemsg(first_mp); return; } } /* Non-fragmented broadcast or multicast packet? */ if (ire->ire_type == IRE_BROADCAST) goto udpslowpath; if ((connp = ipcl_classify_v4(mp, IPPROTO_UDP, IP_SIMPLE_HDR_LENGTH, ire->ire_zoneid)) != NULL) { ASSERT(connp->conn_upq != NULL); IP_STAT(ip_udp_fast_path); if (CONN_UDP_FLOWCTLD(connp)) { freemsg(mp); BUMP_MIB(&ip_mib, udpInOverflows); } else { if (!mctl_present) { BUMP_MIB(&ip_mib, ipInDelivers); } /* * mp and first_mp can change. */ if (ip_udp_check(q, connp, recv_ill, ipha, &mp, &first_mp, mctl_present)) { /* Send it upstream */ CONN_UDP_RECV(connp, mp); } } /* * freeb() cannot deal with null mblk being passed * in and first_mp can be set to null in the call * ipsec_input_fast_proc()->ipsec_check_inbound_policy. */ if (mctl_present && first_mp != NULL) { freeb(first_mp); } CONN_DEC_REF(connp); return; } /* * if we got here we know the packet is not fragmented and * has no options. The classifier could not find a conn_t and * most likely its an icmp packet so send it through slow path. */ goto udpslowpath; ipoptions: if (!ip_options_cksum(q, mp, ipha, ire)) { goto slow_done; } UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; u1 = ntohs(ipha->ipha_fragment_offset_and_flags); if (u1 & (IPH_MF | IPH_OFFSET)) { fragmented: /* * "sum" and "reass_hck_flags" are non-zero if the * reassembled packet has a valid hardware computed * checksum information associated with it. */ if (!ip_rput_fragment(q, &mp, ipha, &sum, &reass_hck_flags)) goto slow_done; /* * Make sure that first_mp points back to mp as * the mp we came in with could have changed in * ip_rput_fragment(). */ ASSERT(!mctl_present); ipha = (ipha_t *)mp->b_rptr; first_mp = mp; } /* Now we have a complete datagram, destined for this machine. */ u1 = IPH_HDR_LENGTH(ipha); /* Pull up the UDP header, if necessary. */ if ((MBLKL(mp)) < (u1 + UDPH_SIZE)) { udppullup: if (!pullupmsg(mp, u1 + UDPH_SIZE)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); goto slow_done; } ipha = (ipha_t *)mp->b_rptr; } /* * Validate the checksum for the reassembled packet; for the * pullup case we calculate the payload checksum in software. */ up = (uint16_t *)((uchar_t *)ipha + u1 + UDP_PORTS_OFFSET); if (up[3] != 0) { boolean_t cksum_err; if ((reass_hck_flags & (HCK_FULLCKSUM|HCK_PARTIALCKSUM)) == 0) IP_STAT(ip_in_sw_cksum); IP_CKSUM_RECV_REASS(reass_hck_flags, (int32_t)((uchar_t *)up - (uchar_t *)ipha), IP_UDP_CSUM_COMP + iphs[6] + iphs[7] + iphs[8] + iphs[9] + up[2], sum, cksum_err); if (cksum_err) { BUMP_MIB(&ip_mib, udpInCksumErrs); if (reass_hck_flags & HCK_FULLCKSUM) IP_STAT(ip_udp_in_full_hw_cksum_err); else if (reass_hck_flags & HCK_PARTIALCKSUM) IP_STAT(ip_udp_in_part_hw_cksum_err); else IP_STAT(ip_udp_in_sw_cksum_err); freemsg(first_mp); goto slow_done; } } udpslowpath: /* Clear hardware checksum flag to be safe */ DB_CKSUMFLAGS(mp) = 0; ip_fanout_udp(q, first_mp, ill, ipha, *(uint32_t *)up, (ire->ire_type == IRE_BROADCAST), IP_FF_SEND_ICMP | IP_FF_CKSUM | IP_FF_IP6INFO, mctl_present, B_TRUE, recv_ill, ire->ire_zoneid); slow_done: IP_STAT(ip_udp_slow_path); return; #undef iphs #undef rptr } /* ARGSUSED */ static mblk_t * ip_tcp_input(mblk_t *mp, ipha_t *ipha, ill_t *recv_ill, boolean_t mctl_present, ire_t *ire, mblk_t *first_mp, uint_t flags, queue_t *q, ill_rx_ring_t *ill_ring) { conn_t *connp; uint32_t sum; uint32_t u1; uint16_t *up; int offset; ssize_t len; mblk_t *mp1; boolean_t syn_present = B_FALSE; tcph_t *tcph; uint_t ip_hdr_len; ill_t *ill = (ill_t *)q->q_ptr; zoneid_t zoneid = ire->ire_zoneid; boolean_t cksum_err; uint16_t hck_flags = 0; #define rptr ((uchar_t *)ipha) ASSERT(ipha->ipha_protocol == IPPROTO_TCP); /* * FAST PATH for tcp packets */ /* u1 is # words of IP options */ u1 = ipha->ipha_version_and_hdr_length - (uchar_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS); /* IP options present */ if (u1) { goto ipoptions; } else { /* Check the IP header checksum. */ if (IS_IP_HDR_HWCKSUM(mctl_present, mp, ill)) { /* Clear the IP header h/w cksum flag */ DB_CKSUMFLAGS(mp) &= ~HCK_IPV4_HDRCKSUM; } else { #define uph ((uint16_t *)ipha) sum = uph[0] + uph[1] + uph[2] + uph[3] + uph[4] + uph[5] + uph[6] + uph[7] + uph[8] + uph[9]; #undef uph /* finish doing IP checksum */ sum = (sum & 0xFFFF) + (sum >> 16); sum = ~(sum + (sum >> 16)) & 0xFFFF; /* * Don't verify header checksum if this packet * is coming back from AH/ESP as we already did it. */ if (!mctl_present && (sum != 0) && sum != 0xFFFF) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto error; } } } if (!mctl_present) { UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; } /* packet part of fragmented IP packet? */ u1 = ntohs(ipha->ipha_fragment_offset_and_flags); if (u1 & (IPH_MF | IPH_OFFSET)) { goto fragmented; } /* u1 = IP header length (20 bytes) */ u1 = ip_hdr_len = IP_SIMPLE_HDR_LENGTH; /* does packet contain IP+TCP headers? */ len = mp->b_wptr - rptr; if (len < (IP_SIMPLE_HDR_LENGTH + TCP_MIN_HEADER_LENGTH)) { IP_STAT(ip_tcppullup); goto tcppullup; } /* TCP options present? */ offset = ((uchar_t *)ipha)[IP_SIMPLE_HDR_LENGTH + 12] >> 4; /* * If options need to be pulled up, then goto tcpoptions. * otherwise we are still in the fast path */ if (len < (offset << 2) + IP_SIMPLE_HDR_LENGTH) { IP_STAT(ip_tcpoptions); goto tcpoptions; } /* multiple mblks of tcp data? */ if ((mp1 = mp->b_cont) != NULL) { /* more then two? */ if (mp1->b_cont != NULL) { IP_STAT(ip_multipkttcp); goto multipkttcp; } len += mp1->b_wptr - mp1->b_rptr; } up = (uint16_t *)(rptr + IP_SIMPLE_HDR_LENGTH + TCP_PORTS_OFFSET); /* part of pseudo checksum */ /* TCP datagram length */ u1 = len - IP_SIMPLE_HDR_LENGTH; #define iphs ((uint16_t *)ipha) #ifdef _BIG_ENDIAN u1 += IPPROTO_TCP; #else u1 = ((u1 >> 8) & 0xFF) + (((u1 & 0xFF) + IPPROTO_TCP) << 8); #endif u1 += iphs[6] + iphs[7] + iphs[8] + iphs[9]; /* * Revert to software checksum calculation if the interface * isn't capable of checksum offload or if IPsec is present. */ if (ILL_HCKSUM_CAPABLE(ill) && !mctl_present && dohwcksum) hck_flags = DB_CKSUMFLAGS(mp); if ((hck_flags & (HCK_FULLCKSUM|HCK_PARTIALCKSUM)) == 0) IP_STAT(ip_in_sw_cksum); IP_CKSUM_RECV(hck_flags, u1, (uchar_t *)(rptr + DB_CKSUMSTART(mp)), (int32_t)((uchar_t *)up - rptr), mp, mp1, cksum_err); if (cksum_err) { BUMP_MIB(&ip_mib, tcpInErrs); if (hck_flags & HCK_FULLCKSUM) IP_STAT(ip_tcp_in_full_hw_cksum_err); else if (hck_flags & HCK_PARTIALCKSUM) IP_STAT(ip_tcp_in_part_hw_cksum_err); else IP_STAT(ip_tcp_in_sw_cksum_err); goto error; } try_again: if ((connp = ipcl_classify_v4(mp, IPPROTO_TCP, ip_hdr_len, zoneid)) == NULL) { /* Send the TH_RST */ goto no_conn; } /* * TCP FAST PATH for AF_INET socket. * * TCP fast path to avoid extra work. An AF_INET socket type * does not have facility to receive extra information via * ip_process or ip_add_info. Also, when the connection was * established, we made a check if this connection is impacted * by any global IPSec policy or per connection policy (a * policy that comes in effect later will not apply to this * connection). Since all this can be determined at the * connection establishment time, a quick check of flags * can avoid extra work. */ if (IPCL_IS_TCP4_CONNECTED_NO_POLICY(connp) && !mctl_present && !IPP_ENABLED(IPP_LOCAL_IN)) { ASSERT(first_mp == mp); SET_SQUEUE(mp, tcp_rput_data, connp); return (mp); } tcph = (tcph_t *)&mp->b_rptr[ip_hdr_len]; if ((tcph->th_flags[0] & (TH_SYN|TH_ACK|TH_RST|TH_URG)) == TH_SYN) { if (IPCL_IS_TCP(connp)) { mp->b_datap->db_struioflag |= STRUIO_EAGER; DB_CKSUMSTART(mp) = (intptr_t)ip_squeue_get(ill_ring); if (IPCL_IS_FULLY_BOUND(connp) && !mctl_present && !CONN_INBOUND_POLICY_PRESENT(connp)) { SET_SQUEUE(mp, connp->conn_recv, connp); return (mp); } else if (IPCL_IS_BOUND(connp) && !mctl_present && !CONN_INBOUND_POLICY_PRESENT(connp)) { ip_squeue_enter_unbound++; SET_SQUEUE(mp, tcp_conn_request_unbound, connp); return (mp); } syn_present = B_TRUE; } } if (IPCL_IS_TCP(connp) && IPCL_IS_BOUND(connp) && !syn_present) { uint_t flags = (unsigned int)tcph->th_flags[0] & 0xFF; /* No need to send this packet to TCP */ if ((flags & TH_RST) || (flags & TH_URG)) { CONN_DEC_REF(connp); freemsg(first_mp); return (NULL); } if (flags & TH_ACK) { tcp_xmit_listeners_reset(first_mp, ip_hdr_len, zoneid); CONN_DEC_REF(connp); return (NULL); } CONN_DEC_REF(connp); freemsg(first_mp); return (NULL); } if (CONN_INBOUND_POLICY_PRESENT(connp) || mctl_present) { first_mp = ipsec_check_inbound_policy(first_mp, connp, ipha, NULL, mctl_present); if (first_mp == NULL) { CONN_DEC_REF(connp); return (NULL); } if (IPCL_IS_TCP(connp) && IPCL_IS_BOUND(connp)) { ASSERT(syn_present); if (mctl_present) { ASSERT(first_mp != mp); first_mp->b_datap->db_struioflag |= STRUIO_POLICY; } else { ASSERT(first_mp == mp); mp->b_datap->db_struioflag &= ~STRUIO_EAGER; mp->b_datap->db_struioflag |= STRUIO_POLICY; } } else { /* * Discard first_mp early since we're dealing with a * fully-connected conn_t and tcp doesn't do policy in * this case. */ if (mctl_present) { freeb(first_mp); mctl_present = B_FALSE; } first_mp = mp; } } /* Initiate IPPF processing for fastpath */ if (IPP_ENABLED(IPP_LOCAL_IN)) { uint32_t ill_index; ill_index = recv_ill->ill_phyint->phyint_ifindex; ip_process(IPP_LOCAL_IN, &mp, ill_index); if (mp == NULL) { ip2dbg(("ip_input_ipsec_process: TCP pkt " "deferred/dropped during IPPF processing\n")); CONN_DEC_REF(connp); if (mctl_present) freeb(first_mp); return (NULL); } else if (mctl_present) { /* * ip_process might return a new mp. */ ASSERT(first_mp != mp); first_mp->b_cont = mp; } else { first_mp = mp; } } if (!syn_present && connp->conn_ipv6_recvpktinfo) { mp = ip_add_info(mp, recv_ill, flags); if (mp == NULL) { CONN_DEC_REF(connp); if (mctl_present) freeb(first_mp); return (NULL); } else if (mctl_present) { /* * ip_add_info might return a new mp. */ ASSERT(first_mp != mp); first_mp->b_cont = mp; } else { first_mp = mp; } } if (IPCL_IS_TCP(connp)) { SET_SQUEUE(first_mp, connp->conn_recv, connp); return (first_mp); } else { putnext(connp->conn_rq, first_mp); CONN_DEC_REF(connp); return (NULL); } no_conn: /* Initiate IPPf processing, if needed. */ if (IPP_ENABLED(IPP_LOCAL_IN)) { uint32_t ill_index; ill_index = recv_ill->ill_phyint->phyint_ifindex; ip_process(IPP_LOCAL_IN, &first_mp, ill_index); if (first_mp == NULL) { return (NULL); } } BUMP_MIB(&ip_mib, ipInDelivers); tcp_xmit_listeners_reset(first_mp, IPH_HDR_LENGTH(mp->b_rptr), zoneid); return (NULL); ipoptions: if (!ip_options_cksum(q, first_mp, ipha, ire)) { goto slow_done; } UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; u1 = ntohs(ipha->ipha_fragment_offset_and_flags); if (u1 & (IPH_MF | IPH_OFFSET)) { fragmented: if (!ip_rput_fragment(q, &mp, ipha, NULL, NULL)) { if (mctl_present) freeb(first_mp); goto slow_done; } /* * Make sure that first_mp points back to mp as * the mp we came in with could have changed in * ip_rput_fragment(). */ ASSERT(!mctl_present); ipha = (ipha_t *)mp->b_rptr; first_mp = mp; } /* Now we have a complete datagram, destined for this machine. */ u1 = ip_hdr_len = IPH_HDR_LENGTH(ipha); len = mp->b_wptr - mp->b_rptr; /* Pull up a minimal TCP header, if necessary. */ if (len < (u1 + 20)) { tcppullup: if (!pullupmsg(mp, u1 + 20)) { BUMP_MIB(&ip_mib, ipInDiscards); goto error; } ipha = (ipha_t *)mp->b_rptr; len = mp->b_wptr - mp->b_rptr; } /* * Extract the offset field from the TCP header. As usual, we * try to help the compiler more than the reader. */ offset = ((uchar_t *)ipha)[u1 + 12] >> 4; if (offset != 5) { tcpoptions: if (offset < 5) { BUMP_MIB(&ip_mib, ipInDiscards); goto error; } /* * There must be TCP options. * Make sure we can grab them. */ offset <<= 2; offset += u1; if (len < offset) { if (!pullupmsg(mp, offset)) { BUMP_MIB(&ip_mib, ipInDiscards); goto error; } ipha = (ipha_t *)mp->b_rptr; len = mp->b_wptr - rptr; } } /* Get the total packet length in len, including headers. */ if (mp->b_cont) { multipkttcp: len = msgdsize(mp); } /* * Check the TCP checksum by pulling together the pseudo- * header checksum, and passing it to ip_csum to be added in * with the TCP datagram. * * Since we are not using the hwcksum if available we must * clear the flag. We may come here via tcppullup or tcpoptions. * If either of these fails along the way the mblk is freed. * If this logic ever changes and mblk is reused to say send * ICMP's back, then this flag may need to be cleared in * other places as well. */ DB_CKSUMFLAGS(mp) = 0; up = (uint16_t *)(rptr + u1 + TCP_PORTS_OFFSET); u1 = (uint32_t)(len - u1); /* TCP datagram length. */ #ifdef _BIG_ENDIAN u1 += IPPROTO_TCP; #else u1 = ((u1 >> 8) & 0xFF) + (((u1 & 0xFF) + IPPROTO_TCP) << 8); #endif u1 += iphs[6] + iphs[7] + iphs[8] + iphs[9]; /* * Not M_DATA mblk or its a dup, so do the checksum now. */ IP_STAT(ip_in_sw_cksum); if (IP_CSUM(mp, (int32_t)((uchar_t *)up - rptr), u1) != 0) { BUMP_MIB(&ip_mib, tcpInErrs); goto error; } IP_STAT(ip_tcp_slow_path); goto try_again; #undef iphs #undef rptr error: freemsg(first_mp); slow_done: return (NULL); } /* ARGSUSED */ static void ip_sctp_input(mblk_t *mp, ipha_t *ipha, ill_t *recv_ill, boolean_t mctl_present, ire_t *ire, mblk_t *first_mp, uint_t flags, queue_t *q, ipaddr_t dst) { conn_t *connp; uint32_t sum; uint32_t u1; ssize_t len; sctp_hdr_t *sctph; zoneid_t zoneid = ire->ire_zoneid; uint32_t pktsum; uint32_t calcsum; uint32_t ports; uint_t ipif_seqid; in6_addr_t map_src, map_dst; ill_t *ill = (ill_t *)q->q_ptr; #define rptr ((uchar_t *)ipha) ASSERT(ipha->ipha_protocol == IPPROTO_SCTP); /* u1 is # words of IP options */ u1 = ipha->ipha_version_and_hdr_length - (uchar_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS); /* IP options present */ if (u1 > 0) { goto ipoptions; } else { /* Check the IP header checksum. */ if (!IS_IP_HDR_HWCKSUM(mctl_present, mp, ill)) { #define uph ((uint16_t *)ipha) sum = uph[0] + uph[1] + uph[2] + uph[3] + uph[4] + uph[5] + uph[6] + uph[7] + uph[8] + uph[9]; #undef uph /* finish doing IP checksum */ sum = (sum & 0xFFFF) + (sum >> 16); sum = ~(sum + (sum >> 16)) & 0xFFFF; /* * Don't verify header checksum if this packet * is coming back from AH/ESP as we already did it. */ if (!mctl_present && (sum != 0) && sum != 0xFFFF) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto error; } } /* * Since there is no SCTP h/w cksum support yet, just * clear the flag. */ DB_CKSUMFLAGS(mp) = 0; } /* * Don't verify header checksum if this packet is coming * back from AH/ESP as we already did it. */ if (!mctl_present) { UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; } /* packet part of fragmented IP packet? */ u1 = ntohs(ipha->ipha_fragment_offset_and_flags); if (u1 & (IPH_MF | IPH_OFFSET)) goto fragmented; /* u1 = IP header length (20 bytes) */ u1 = IP_SIMPLE_HDR_LENGTH; find_sctp_client: /* Pullup if we don't have the sctp common header. */ len = MBLKL(mp); if (len < (u1 + SCTP_COMMON_HDR_LENGTH)) { if (mp->b_cont == NULL || !pullupmsg(mp, u1 + SCTP_COMMON_HDR_LENGTH)) { BUMP_MIB(&ip_mib, ipInDiscards); goto error; } ipha = (ipha_t *)mp->b_rptr; len = MBLKL(mp); } sctph = (sctp_hdr_t *)(rptr + u1); #ifdef DEBUG if (!skip_sctp_cksum) { #endif pktsum = sctph->sh_chksum; sctph->sh_chksum = 0; calcsum = sctp_cksum(mp, u1); if (calcsum != pktsum) { BUMP_MIB(&sctp_mib, sctpChecksumError); goto error; } sctph->sh_chksum = pktsum; #ifdef DEBUG /* skip_sctp_cksum */ } #endif /* get the ports */ ports = *(uint32_t *)&sctph->sh_sport; ipif_seqid = ire->ire_ipif->ipif_seqid; IRE_REFRELE(ire); IN6_IPADDR_TO_V4MAPPED(ipha->ipha_dst, &map_dst); IN6_IPADDR_TO_V4MAPPED(ipha->ipha_src, &map_src); if ((connp = sctp_fanout(&map_src, &map_dst, ports, ipif_seqid, zoneid, mp)) == NULL) { /* Check for raw socket or OOTB handling */ goto no_conn; } /* Found a client; up it goes */ BUMP_MIB(&ip_mib, ipInDelivers); sctp_input(connp, ipha, mp, first_mp, recv_ill, B_TRUE, mctl_present); return; no_conn: ip_fanout_sctp_raw(first_mp, recv_ill, ipha, B_TRUE, ports, mctl_present, flags, B_TRUE, ipif_seqid, zoneid); return; ipoptions: DB_CKSUMFLAGS(mp) = 0; if (!ip_options_cksum(q, first_mp, ipha, ire)) goto slow_done; UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; u1 = ntohs(ipha->ipha_fragment_offset_and_flags); if (u1 & (IPH_MF | IPH_OFFSET)) { fragmented: if (!ip_rput_fragment(q, &mp, ipha, NULL, NULL)) goto slow_done; /* * Make sure that first_mp points back to mp as * the mp we came in with could have changed in * ip_rput_fragment(). */ ASSERT(!mctl_present); ipha = (ipha_t *)mp->b_rptr; first_mp = mp; } /* Now we have a complete datagram, destined for this machine. */ u1 = IPH_HDR_LENGTH(ipha); goto find_sctp_client; #undef iphs #undef rptr error: freemsg(first_mp); slow_done: IRE_REFRELE(ire); } #define VER_BITS 0xF0 #define VERSION_6 0x60 static boolean_t ip_rput_multimblk_ipoptions(queue_t *q, mblk_t *mp, ipha_t **iphapp, ipaddr_t *dstp) { uint_t opt_len; ipha_t *ipha; ssize_t len; uint_t pkt_len; IP_STAT(ip_ipoptions); ipha = *iphapp; #define rptr ((uchar_t *)ipha) /* Assume no IPv6 packets arrive over the IPv4 queue */ if (IPH_HDR_VERSION(ipha) == IPV6_VERSION) { BUMP_MIB(&ip_mib, ipInIPv6); freemsg(mp); return (B_FALSE); } /* multiple mblk or too short */ pkt_len = ntohs(ipha->ipha_length); /* Get the number of words of IP options in the IP header. */ opt_len = ipha->ipha_version_and_hdr_length - IP_SIMPLE_HDR_VERSION; if (opt_len) { /* IP Options present! Validate and process. */ if (opt_len > (15 - IP_SIMPLE_HDR_LENGTH_IN_WORDS)) { BUMP_MIB(&ip_mib, ipInHdrErrors); goto done; } /* * Recompute complete header length and make sure we * have access to all of it. */ len = ((size_t)opt_len + IP_SIMPLE_HDR_LENGTH_IN_WORDS) << 2; if (len > (mp->b_wptr - rptr)) { if (len > pkt_len) { BUMP_MIB(&ip_mib, ipInHdrErrors); goto done; } if (!pullupmsg(mp, len)) { BUMP_MIB(&ip_mib, ipInDiscards); goto done; } ipha = (ipha_t *)mp->b_rptr; } /* * Go off to ip_rput_options which returns the next hop * destination address, which may have been affected * by source routing. */ IP_STAT(ip_opt); if (ip_rput_options(q, mp, ipha, dstp) == -1) { return (B_FALSE); } } *iphapp = ipha; return (B_TRUE); done: /* clear b_prev - used by ip_mroute_decap */ mp->b_prev = NULL; freemsg(mp); return (B_FALSE); #undef rptr } /* * Deal with the fact that there is no ire for the destination. * The incoming ill (in_ill) is passed in to ip_newroute only * in the case of packets coming from mobile ip forward tunnel. * It must be null otherwise. */ static ire_t * ip_rput_noire(queue_t *q, ill_t *in_ill, mblk_t *mp, int ll_multicast, ipaddr_t dst) { ipha_t *ipha; ill_t *ill; ire_t *ire; boolean_t check_multirt = B_FALSE; ipha = (ipha_t *)mp->b_rptr; ill = (ill_t *)q->q_ptr; ASSERT(ill != NULL); /* * No IRE for this destination, so it can't be for us. * Unless we are forwarding, drop the packet. * We have to let source routed packets through * since we don't yet know if they are 'ping -l' * packets i.e. if they will go out over the * same interface as they came in on. */ if (ll_multicast) { freemsg(mp); return (NULL); } if (!(ill->ill_flags & ILLF_ROUTER) && !ip_source_routed(ipha)) { BUMP_MIB(&ip_mib, ipForwProhibits); freemsg(mp); return (NULL); } /* * Mark this packet as having originated externally. * * For non-forwarding code path, ire_send later double * checks this interface to see if it is still exists * post-ARP resolution. * * Also, IPQOS uses this to differentiate between * IPP_FWD_OUT and IPP_LOCAL_OUT for post-ARP * QOS packet processing in ip_wput_attach_llhdr(). * The QoS module can mark the b_band for a fastpath message * or the dl_priority field in a unitdata_req header for * CoS marking. This info can only be found in * ip_wput_attach_llhdr(). */ mp->b_prev = (mblk_t *)(uintptr_t)ill->ill_phyint->phyint_ifindex; /* * Clear the indication that this may have a hardware checksum * as we are not using it */ DB_CKSUMFLAGS(mp) = 0; if (in_ill != NULL) { /* * Now hand the packet to ip_newroute. */ ip_newroute(q, mp, dst, in_ill, NULL, GLOBAL_ZONEID); return (NULL); } ire = ire_forward(dst, &check_multirt, NULL, NULL, MBLK_GETLABEL(mp)); if (ire == NULL && check_multirt) { /* Let ip_newroute handle CGTP */ ip_newroute(q, mp, dst, in_ill, NULL, GLOBAL_ZONEID); return (NULL); } if (ire != NULL) return (ire); mp->b_prev = mp->b_next = 0; /* send icmp unreachable */ q = WR(q); /* Sent by forwarding path, and router is global zone */ if (ip_source_routed(ipha)) { icmp_unreachable(q, mp, ICMP_SOURCE_ROUTE_FAILED, GLOBAL_ZONEID); } else { icmp_unreachable(q, mp, ICMP_HOST_UNREACHABLE, GLOBAL_ZONEID); } return (NULL); } /* * check ip header length and align it. */ static boolean_t ip_check_and_align_header(queue_t *q, mblk_t *mp) { ssize_t len; ill_t *ill; ipha_t *ipha; len = MBLKL(mp); if (!OK_32PTR(mp->b_rptr) || len < IP_SIMPLE_HDR_LENGTH) { if (!OK_32PTR(mp->b_rptr)) IP_STAT(ip_notaligned1); else IP_STAT(ip_notaligned2); /* Guard against bogus device drivers */ if (len < 0) { /* clear b_prev - used by ip_mroute_decap */ mp->b_prev = NULL; BUMP_MIB(&ip_mib, ipInHdrErrors); freemsg(mp); return (B_FALSE); } if (ip_rput_pullups++ == 0) { ill = (ill_t *)q->q_ptr; ipha = (ipha_t *)mp->b_rptr; (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "ip_check_and_align_header: %s forced us to " " pullup pkt, hdr len %ld, hdr addr %p", ill->ill_name, len, ipha); } if (!pullupmsg(mp, IP_SIMPLE_HDR_LENGTH)) { /* clear b_prev - used by ip_mroute_decap */ mp->b_prev = NULL; BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); return (B_FALSE); } } return (B_TRUE); } static boolean_t ip_rput_notforus(queue_t **qp, mblk_t *mp, ire_t *ire, ill_t *ill) { ill_group_t *ill_group; ill_group_t *ire_group; queue_t *q; ill_t *ire_ill; uint_t ill_ifindex; q = *qp; /* * We need to check to make sure the packet came in * on the queue associated with the destination IRE. * Note that for multicast packets and broadcast packets sent to * a broadcast address which is shared between multiple interfaces * we should not do this since we just got a random broadcast ire. */ if (ire->ire_rfq && ire->ire_type != IRE_BROADCAST) { boolean_t check_multi = B_TRUE; /* * This packet came in on an interface other than the * one associated with the destination address. * "Gateway" it to the appropriate interface here. * As long as the ills belong to the same group, * we don't consider them to arriving on the wrong * interface. Thus, when the switch is doing inbound * load spreading, we won't drop packets when we * are doing strict multihoming checks. Note, the * same holds true for 'usesrc groups' where the * destination address may belong to another interface * to allow multipathing to happen */ ill_group = ill->ill_group; ire_ill = (ill_t *)(ire->ire_rfq)->q_ptr; ill_ifindex = ill->ill_usesrc_ifindex; ire_group = ire_ill->ill_group; /* * If it's part of the same IPMP group, or if it's a legal * address on the 'usesrc' interface, then bypass strict * checks. */ if (ill_group != NULL && ill_group == ire_group) { check_multi = B_FALSE; } else if (ill_ifindex != 0 && ill_ifindex == ire_ill->ill_phyint->phyint_ifindex) { check_multi = B_FALSE; } if (check_multi && ip_strict_dst_multihoming && ((ill->ill_flags & ire->ire_ipif->ipif_ill->ill_flags & ILLF_ROUTER) == 0)) { /* Drop packet */ BUMP_MIB(&ip_mib, ipForwProhibits); freemsg(mp); return (B_TRUE); } /* * Change the queue (for non-virtual destination network * interfaces) and ip_rput_local will be called with the right * queue */ q = ire->ire_rfq; } /* Must be broadcast. We'll take it. */ *qp = q; return (B_FALSE); } ire_t * ip_fast_forward(ire_t *ire, ipaddr_t dst, ill_t *ill, mblk_t *mp) { ipha_t *ipha; ipaddr_t ip_dst, ip_src; ire_t *src_ire = NULL; ill_t *stq_ill; uint_t hlen; uint32_t sum; queue_t *dev_q; boolean_t check_multirt = B_FALSE; ipha = (ipha_t *)mp->b_rptr; /* * Martian Address Filtering [RFC 1812, Section 5.3.7] * The loopback address check for both src and dst has already * been checked in ip_input */ ip_dst = ntohl(dst); ip_src = ntohl(ipha->ipha_src); if (ip_dst == INADDR_ANY || IN_BADCLASS(ip_dst) || IN_CLASSD(ip_src)) { BUMP_MIB(&ip_mib, ipForwProhibits); goto drop; } src_ire = ire_ctable_lookup(ipha->ipha_src, 0, IRE_BROADCAST, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (src_ire != NULL) { BUMP_MIB(&ip_mib, ipForwProhibits); goto drop; } /* No ire cache of nexthop. So first create one */ if (ire == NULL) { ire = ire_forward(dst, &check_multirt, NULL, NULL, NULL); /* * We only come to ip_fast_forward if ip_cgtp_filter is * is not set. So upon return from ire_forward * check_multirt should remain as false. */ ASSERT(!check_multirt); if (ire == NULL) { BUMP_MIB(&ip_mib, ipInDiscards); mp->b_prev = mp->b_next = 0; /* send icmp unreachable */ /* Sent by forwarding path, and router is global zone */ if (ip_source_routed(ipha)) { icmp_unreachable(ill->ill_wq, mp, ICMP_SOURCE_ROUTE_FAILED, GLOBAL_ZONEID); } else { icmp_unreachable(ill->ill_wq, mp, ICMP_HOST_UNREACHABLE, GLOBAL_ZONEID); } return (ire); } } /* * Forwarding fastpath exception case: * If either of the follwoing case is true, we take * the slowpath * o forwarding is not enabled * o incoming and outgoing interface are the same, or the same * IPMP group * o corresponding ire is in incomplete state * o packet needs fragmentation * * The codeflow from here on is thus: * ip_rput_process_forward->ip_rput_forward->ip_xmit_v4 */ stq_ill = (ill_t *)ire->ire_stq->q_ptr; if (!(stq_ill->ill_flags & ILLF_ROUTER) || !(ill->ill_flags & ILLF_ROUTER) || (ill == stq_ill) || (ill->ill_group != NULL && ill->ill_group == stq_ill->ill_group) || (ire->ire_nce == NULL) || (ire->ire_nce->nce_state != ND_REACHABLE) || (ntohs(ipha->ipha_length) > ire->ire_max_frag) || ipha->ipha_ttl <= 1) { ip_rput_process_forward(ill->ill_rq, mp, ire, ipha, ill, B_FALSE); return (ire); } DTRACE_PROBE4(ip4__forwarding__start, ill_t *, ill, ill_t *, stq_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_forwarding_event, ipv4firewall_forwarding, ill, stq_ill, ipha, mp, mp); DTRACE_PROBE1(ip4__forwarding__end, mblk_t *, mp); if (mp == NULL) goto drop; mp->b_datap->db_struioun.cksum.flags = 0; /* Adjust the checksum to reflect the ttl decrement. */ sum = (int)ipha->ipha_hdr_checksum + IP_HDR_CSUM_TTL_ADJUST; ipha->ipha_hdr_checksum = (uint16_t)(sum + (sum >> 16)); ipha->ipha_ttl--; dev_q = ire->ire_stq->q_next; if ((dev_q->q_next != NULL || dev_q->q_first != NULL) && !canput(dev_q)) { goto indiscard; } hlen = ire->ire_nce->nce_fp_mp != NULL ? MBLKL(ire->ire_nce->nce_fp_mp) : 0; if (hlen != 0 || ire->ire_nce->nce_res_mp != NULL) { mblk_t *mpip = mp; mp = ip_wput_attach_llhdr(mpip, ire, 0, 0); if (mp != NULL) { DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, stq_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, stq_ill, ipha, mp, mpip); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp == NULL) goto drop; UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; BUMP_MIB(&ip_mib, ipForwDatagrams); putnext(ire->ire_stq, mp); return (ire); } } indiscard: BUMP_MIB(&ip_mib, ipInDiscards); drop: if (mp != NULL) freemsg(mp); if (src_ire != NULL) ire_refrele(src_ire); return (ire); } /* * This function is called in the forwarding slowpath, when * either the ire lacks the link-layer address, or the packet needs * further processing(eg. fragmentation), before transmission. */ static void ip_rput_process_forward(queue_t *q, mblk_t *mp, ire_t *ire, ipha_t *ipha, ill_t *ill, boolean_t ll_multicast) { ill_group_t *ill_group; ill_group_t *ire_group; queue_t *dev_q; ire_t *src_ire; ASSERT(ire->ire_stq != NULL); mp->b_prev = NULL; /* ip_rput_noire sets incoming interface here */ mp->b_next = NULL; /* ip_rput_noire sets dst here */ if (ll_multicast != 0) goto drop_pkt; /* * check if ipha_src is a broadcast address. Note that this * check is redundant when we get here from ip_fast_forward() * which has already done this check. However, since we can * also get here from ip_rput_process_broadcast() or, for * for the slow path through ip_fast_forward(), we perform * the check again for code-reusability */ src_ire = ire_ctable_lookup(ipha->ipha_src, 0, IRE_BROADCAST, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (src_ire != NULL || ntohl(ipha->ipha_dst) == INADDR_ANY || IN_BADCLASS(ntohl(ipha->ipha_dst))) { if (src_ire != NULL) ire_refrele(src_ire); BUMP_MIB(&ip_mib, ipForwProhibits); ip2dbg(("ip_rput_process_forward: Received packet with" " bad src/dst address on %s\n", ill->ill_name)); goto drop_pkt; } ill_group = ill->ill_group; ire_group = ((ill_t *)(ire->ire_rfq)->q_ptr)->ill_group; /* * Check if we want to forward this one at this time. * We allow source routed packets on a host provided that * they go out the same interface or same interface group * as they came in on. * * XXX To be quicker, we may wish to not chase pointers to * get the ILLF_ROUTER flag and instead store the * forwarding policy in the ire. An unfortunate * side-effect of that would be requiring an ire flush * whenever the ILLF_ROUTER flag changes. */ if (((ill->ill_flags & ((ill_t *)ire->ire_stq->q_ptr)->ill_flags & ILLF_ROUTER) == 0) && !(ip_source_routed(ipha) && (ire->ire_rfq == q || (ill_group != NULL && ill_group == ire_group)))) { BUMP_MIB(&ip_mib, ipForwProhibits); if (ip_source_routed(ipha)) { q = WR(q); /* * Clear the indication that this may have * hardware checksum as we are not using it. */ DB_CKSUMFLAGS(mp) = 0; /* Sent by forwarding path, and router is global zone */ icmp_unreachable(q, mp, ICMP_SOURCE_ROUTE_FAILED, GLOBAL_ZONEID); return; } goto drop_pkt; } /* Packet is being forwarded. Turning off hwcksum flag. */ DB_CKSUMFLAGS(mp) = 0; if (ip_g_send_redirects) { /* * Check whether the incoming interface and outgoing * interface is part of the same group. If so, * send redirects. * * Check the source address to see if it originated * on the same logical subnet it is going back out on. * If so, we should be able to send it a redirect. * Avoid sending a redirect if the destination * is directly connected (i.e., ipha_dst is the same * as ire_gateway_addr or the ire_addr of the * nexthop IRE_CACHE ), or if the packet was source * routed out this interface. */ ipaddr_t src, nhop; mblk_t *mp1; ire_t *nhop_ire = NULL; /* * Check whether ire_rfq and q are from the same ill * or if they are not same, they at least belong * to the same group. If so, send redirects. */ if ((ire->ire_rfq == q || (ill_group != NULL && ill_group == ire_group)) && !ip_source_routed(ipha)) { nhop = (ire->ire_gateway_addr != 0 ? ire->ire_gateway_addr : ire->ire_addr); if (ipha->ipha_dst == nhop) { /* * We avoid sending a redirect if the * destination is directly connected * because it is possible that multiple * IP subnets may have been configured on * the link, and the source may not * be on the same subnet as ip destination, * even though they are on the same * physical link. */ goto sendit; } src = ipha->ipha_src; /* * We look up the interface ire for the nexthop, * to see if ipha_src is in the same subnet * as the nexthop. * * Note that, if, in the future, IRE_CACHE entries * are obsoleted, this lookup will not be needed, * as the ire passed to this function will be the * same as the nhop_ire computed below. */ nhop_ire = ire_ftable_lookup(nhop, 0, 0, IRE_INTERFACE, NULL, NULL, ALL_ZONES, 0, NULL, MATCH_IRE_TYPE); if (nhop_ire != NULL) { if ((src & nhop_ire->ire_mask) == (nhop & nhop_ire->ire_mask)) { /* * The source is directly connected. * Just copy the ip header (which is * in the first mblk) */ mp1 = copyb(mp); if (mp1 != NULL) { icmp_send_redirect(WR(q), mp1, nhop); } } ire_refrele(nhop_ire); } } } sendit: dev_q = ire->ire_stq->q_next; if ((dev_q->q_next || dev_q->q_first) && !canput(dev_q)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); return; } ip_rput_forward(ire, ipha, mp, ill); return; drop_pkt: ip2dbg(("ip_rput_process_forward: drop pkt\n")); freemsg(mp); } ire_t * ip_rput_process_broadcast(queue_t **qp, mblk_t *mp, ire_t *ire, ipha_t *ipha, ill_t *ill, ipaddr_t dst, int cgtp_flt_pkt, int ll_multicast) { queue_t *q; uint16_t hcksumflags; q = *qp; /* * Clear the indication that this may have hardware * checksum as we are not using it for forwarding. */ hcksumflags = DB_CKSUMFLAGS(mp); DB_CKSUMFLAGS(mp) = 0; /* * Directed broadcast forwarding: if the packet came in over a * different interface then it is routed out over we can forward it. */ if (ipha->ipha_protocol == IPPROTO_TCP) { ire_refrele(ire); freemsg(mp); BUMP_MIB(&ip_mib, ipInDiscards); return (NULL); } /* * For multicast we have set dst to be INADDR_BROADCAST * for delivering to all STREAMS. IRE_MARK_NORECV is really * only for broadcast packets. */ if (!CLASSD(ipha->ipha_dst)) { ire_t *new_ire; ipif_t *ipif; /* * For ill groups, as the switch duplicates broadcasts * across all the ports, we need to filter out and * send up only one copy. There is one copy for every * broadcast address on each ill. Thus, we look for a * specific IRE on this ill and look at IRE_MARK_NORECV * later to see whether this ill is eligible to receive * them or not. ill_nominate_bcast_rcv() nominates only * one set of IREs for receiving. */ ipif = ipif_get_next_ipif(NULL, ill); if (ipif == NULL) { ire_refrele(ire); freemsg(mp); BUMP_MIB(&ip_mib, ipInDiscards); return (NULL); } new_ire = ire_ctable_lookup(dst, 0, 0, ipif, ALL_ZONES, NULL, MATCH_IRE_ILL); ipif_refrele(ipif); if (new_ire != NULL) { if (new_ire->ire_marks & IRE_MARK_NORECV) { ire_refrele(ire); ire_refrele(new_ire); freemsg(mp); BUMP_MIB(&ip_mib, ipInDiscards); return (NULL); } /* * In the special case of multirouted broadcast * packets, we unconditionally need to "gateway" * them to the appropriate interface here. * In the normal case, this cannot happen, because * there is no broadcast IRE tagged with the * RTF_MULTIRT flag. */ if (new_ire->ire_flags & RTF_MULTIRT) { ire_refrele(new_ire); if (ire->ire_rfq != NULL) { q = ire->ire_rfq; *qp = q; } } else { ire_refrele(ire); ire = new_ire; } } else if (cgtp_flt_pkt == CGTP_IP_PKT_NOT_CGTP) { if (!ip_g_forward_directed_bcast) { /* * Free the message if * ip_g_forward_directed_bcast is turned * off for non-local broadcast. */ ire_refrele(ire); freemsg(mp); BUMP_MIB(&ip_mib, ipInDiscards); return (NULL); } } else { /* * This CGTP packet successfully passed the * CGTP filter, but the related CGTP * broadcast IRE has not been found, * meaning that the redundant ipif is * probably down. However, if we discarded * this packet, its duplicate would be * filtered out by the CGTP filter so none * of them would get through. So we keep * going with this one. */ ASSERT(cgtp_flt_pkt == CGTP_IP_PKT_PREMIUM); if (ire->ire_rfq != NULL) { q = ire->ire_rfq; *qp = q; } } } if (ip_g_forward_directed_bcast && ll_multicast == 0) { /* * Verify that there are not more then one * IRE_BROADCAST with this broadcast address which * has ire_stq set. * TODO: simplify, loop over all IRE's */ ire_t *ire1; int num_stq = 0; mblk_t *mp1; /* Find the first one with ire_stq set */ rw_enter(&ire->ire_bucket->irb_lock, RW_READER); for (ire1 = ire; ire1 && !ire1->ire_stq && ire1->ire_addr == ire->ire_addr; ire1 = ire1->ire_next) ; if (ire1) { ire_refrele(ire); ire = ire1; IRE_REFHOLD(ire); } /* Check if there are additional ones with stq set */ for (ire1 = ire; ire1; ire1 = ire1->ire_next) { if (ire->ire_addr != ire1->ire_addr) break; if (ire1->ire_stq) { num_stq++; break; } } rw_exit(&ire->ire_bucket->irb_lock); if (num_stq == 1 && ire->ire_stq != NULL) { ip1dbg(("ip_rput_process_broadcast: directed " "broadcast to 0x%x\n", ntohl(ire->ire_addr))); mp1 = copymsg(mp); if (mp1) { switch (ipha->ipha_protocol) { case IPPROTO_UDP: ip_udp_input(q, mp1, ipha, ire, ill); break; default: ip_proto_input(q, mp1, ipha, ire, ill); break; } } /* * Adjust ttl to 2 (1+1 - the forward engine * will decrement it by one. */ if (ip_csum_hdr(ipha)) { BUMP_MIB(&ip_mib, ipInCksumErrs); ip2dbg(("ip_rput_broadcast:drop pkt\n")); freemsg(mp); ire_refrele(ire); return (NULL); } ipha->ipha_ttl = ip_broadcast_ttl + 1; ipha->ipha_hdr_checksum = 0; ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); ip_rput_process_forward(q, mp, ire, ipha, ill, ll_multicast); ire_refrele(ire); return (NULL); } ip1dbg(("ip_rput: NO directed broadcast to 0x%x\n", ntohl(ire->ire_addr))); } /* Restore any hardware checksum flags */ DB_CKSUMFLAGS(mp) = hcksumflags; return (ire); } /* ARGSUSED */ static boolean_t ip_rput_process_multicast(queue_t *q, mblk_t *mp, ill_t *ill, ipha_t *ipha, int *ll_multicast, ipaddr_t *dstp) { /* * Forward packets only if we have joined the allmulti * group on this interface. */ if (ip_g_mrouter && ill->ill_join_allmulti) { int retval; /* * Clear the indication that this may have hardware * checksum as we are not using it. */ DB_CKSUMFLAGS(mp) = 0; retval = ip_mforward(ill, ipha, mp); /* ip_mforward updates mib variables if needed */ /* clear b_prev - used by ip_mroute_decap */ mp->b_prev = NULL; switch (retval) { case 0: /* * pkt is okay and arrived on phyint. * * If we are running as a multicast router * we need to see all IGMP and/or PIM packets. */ if ((ipha->ipha_protocol == IPPROTO_IGMP) || (ipha->ipha_protocol == IPPROTO_PIM)) { goto done; } break; case -1: /* pkt is mal-formed, toss it */ goto drop_pkt; case 1: /* pkt is okay and arrived on a tunnel */ /* * If we are running a multicast router * we need to see all igmp packets. */ if (ipha->ipha_protocol == IPPROTO_IGMP) { *dstp = INADDR_BROADCAST; *ll_multicast = 1; return (B_FALSE); } goto drop_pkt; } } ILM_WALKER_HOLD(ill); if (ilm_lookup_ill(ill, *dstp, ALL_ZONES) == NULL) { /* * This might just be caused by the fact that * multiple IP Multicast addresses map to the same * link layer multicast - no need to increment counter! */ ILM_WALKER_RELE(ill); freemsg(mp); return (B_TRUE); } ILM_WALKER_RELE(ill); done: ip2dbg(("ip_rput: multicast for us: 0x%x\n", ntohl(*dstp))); /* * This assumes the we deliver to all streams for multicast * and broadcast packets. */ *dstp = INADDR_BROADCAST; *ll_multicast = 1; return (B_FALSE); drop_pkt: ip2dbg(("ip_rput: drop pkt\n")); freemsg(mp); return (B_TRUE); } static boolean_t ip_rput_process_notdata(queue_t *q, mblk_t **first_mpp, ill_t *ill, int *ll_multicast, mblk_t **mpp) { mblk_t *mp1, *from_mp, *to_mp, *mp, *first_mp; boolean_t must_copy = B_FALSE; struct iocblk *iocp; ipha_t *ipha; #define rptr ((uchar_t *)ipha) first_mp = *first_mpp; mp = *mpp; ASSERT(first_mp == mp); /* * if db_ref > 1 then copymsg and free original. Packet may be * changed and do not want other entity who has a reference to this * message to trip over the changes. This is a blind change because * trying to catch all places that might change packet is too * difficult (since it may be a module above this one) * * This corresponds to the non-fast path case. We walk down the full * chain in this case, and check the db_ref count of all the dblks, * and do a copymsg if required. It is possible that the db_ref counts * of the data blocks in the mblk chain can be different. * For Example, we can get a DL_UNITDATA_IND(M_PROTO) with a db_ref * count of 1, followed by a M_DATA block with a ref count of 2, if * 'snoop' is running. */ for (mp1 = mp; mp1 != NULL; mp1 = mp1->b_cont) { if (mp1->b_datap->db_ref > 1) { must_copy = B_TRUE; break; } } if (must_copy) { mp1 = copymsg(mp); if (mp1 == NULL) { for (mp1 = mp; mp1 != NULL; mp1 = mp1->b_cont) { mp1->b_next = NULL; mp1->b_prev = NULL; } freemsg(mp); BUMP_MIB(&ip_mib, ipInDiscards); return (B_TRUE); } for (from_mp = mp, to_mp = mp1; from_mp != NULL; from_mp = from_mp->b_cont, to_mp = to_mp->b_cont) { /* Copy b_prev - used by ip_mroute_decap */ to_mp->b_prev = from_mp->b_prev; from_mp->b_prev = NULL; } *first_mpp = first_mp = mp1; freemsg(mp); mp = mp1; *mpp = mp1; } ipha = (ipha_t *)mp->b_rptr; /* * previous code has a case for M_DATA. * We want to check how that happens. */ ASSERT(first_mp->b_datap->db_type != M_DATA); switch (first_mp->b_datap->db_type) { case M_PROTO: case M_PCPROTO: if (((dl_unitdata_ind_t *)rptr)->dl_primitive != DL_UNITDATA_IND) { /* Go handle anything other than data elsewhere. */ ip_rput_dlpi(q, mp); return (B_TRUE); } *ll_multicast = ((dl_unitdata_ind_t *)rptr)->dl_group_address; /* Ditch the DLPI header. */ mp1 = mp->b_cont; ASSERT(first_mp == mp); *first_mpp = mp1; freeb(mp); *mpp = mp1; return (B_FALSE); case M_IOCACK: ip1dbg(("got iocack ")); iocp = (struct iocblk *)mp->b_rptr; switch (iocp->ioc_cmd) { case DL_IOC_HDR_INFO: ill = (ill_t *)q->q_ptr; ill_fastpath_ack(ill, mp); return (B_TRUE); case SIOCSTUNPARAM: case OSIOCSTUNPARAM: /* Go through qwriter_ip */ break; case SIOCGTUNPARAM: case OSIOCGTUNPARAM: ip_rput_other(NULL, q, mp, NULL); return (B_TRUE); default: putnext(q, mp); return (B_TRUE); } /* FALLTHRU */ case M_ERROR: case M_HANGUP: /* * Since this is on the ill stream we unconditionally * bump up the refcount */ ill_refhold(ill); (void) qwriter_ip(NULL, ill, q, mp, ip_rput_other, CUR_OP, B_FALSE); return (B_TRUE); case M_CTL: if ((MBLKL(first_mp) >= sizeof (da_ipsec_t)) && (((da_ipsec_t *)first_mp->b_rptr)->da_type == IPHADA_M_CTL)) { /* * It's an IPsec accelerated packet. * Make sure that the ill from which we received the * packet has enabled IPsec hardware acceleration. */ if (!(ill->ill_capabilities & (ILL_CAPAB_AH|ILL_CAPAB_ESP))) { /* IPsec kstats: bean counter */ freemsg(mp); return (B_TRUE); } /* * Make mp point to the mblk following the M_CTL, * then process according to type of mp. * After this processing, first_mp will point to * the data-attributes and mp to the pkt following * the M_CTL. */ mp = first_mp->b_cont; if (mp == NULL) { freemsg(first_mp); return (B_TRUE); } /* * A Hardware Accelerated packet can only be M_DATA * ESP or AH packet. */ if (mp->b_datap->db_type != M_DATA) { /* non-M_DATA IPsec accelerated packet */ IPSECHW_DEBUG(IPSECHW_PKT, ("non-M_DATA IPsec accelerated pkt\n")); freemsg(first_mp); return (B_TRUE); } ipha = (ipha_t *)mp->b_rptr; if (ipha->ipha_protocol != IPPROTO_AH && ipha->ipha_protocol != IPPROTO_ESP) { IPSECHW_DEBUG(IPSECHW_PKT, ("non-M_DATA IPsec accelerated pkt\n")); freemsg(first_mp); return (B_TRUE); } *mpp = mp; return (B_FALSE); } putnext(q, mp); return (B_TRUE); case M_FLUSH: if (*mp->b_rptr & FLUSHW) { *mp->b_rptr &= ~FLUSHR; qreply(q, mp); return (B_TRUE); } freemsg(mp); return (B_TRUE); case M_IOCNAK: ip1dbg(("got iocnak ")); iocp = (struct iocblk *)mp->b_rptr; switch (iocp->ioc_cmd) { case DL_IOC_HDR_INFO: case SIOCSTUNPARAM: case OSIOCSTUNPARAM: /* * Since this is on the ill stream we unconditionally * bump up the refcount */ ill_refhold(ill); (void) qwriter_ip(NULL, ill, q, mp, ip_rput_other, CUR_OP, B_FALSE); return (B_TRUE); case SIOCGTUNPARAM: case OSIOCGTUNPARAM: ip_rput_other(NULL, q, mp, NULL); return (B_TRUE); default: break; } /* FALLTHRU */ default: putnext(q, mp); return (B_TRUE); } } /* Read side put procedure. Packets coming from the wire arrive here. */ void ip_rput(queue_t *q, mblk_t *mp) { ill_t *ill; mblk_t *dmp = NULL; TRACE_1(TR_FAC_IP, TR_IP_RPUT_START, "ip_rput_start: q %p", q); ill = (ill_t *)q->q_ptr; if (ill->ill_state_flags & (ILL_CONDEMNED | ILL_LL_SUBNET_PENDING)) { union DL_primitives *dl; /* * Things are opening or closing. Only accept DLPI control * messages. In the open case, the ill->ill_ipif has not yet * been created. In the close case, things hanging off the * ill could have been freed already. In either case it * may not be safe to proceed further. */ dl = (union DL_primitives *)mp->b_rptr; if ((mp->b_datap->db_type != M_PCPROTO) || (dl->dl_primitive == DL_UNITDATA_IND)) { /* * Also SIOC[GS]TUN* ioctls can come here. */ inet_freemsg(mp); TRACE_2(TR_FAC_IP, TR_IP_RPUT_END, "ip_input_end: q %p (%S)", q, "uninit"); return; } } /* * if db_ref > 1 then copymsg and free original. Packet may be * changed and we do not want the other entity who has a reference to * this message to trip over the changes. This is a blind change because * trying to catch all places that might change the packet is too * difficult. * * This corresponds to the fast path case, where we have a chain of * M_DATA mblks. We check the db_ref count of only the 1st data block * in the mblk chain. There doesn't seem to be a reason why a device * driver would send up data with varying db_ref counts in the mblk * chain. In any case the Fast path is a private interface, and our * drivers don't do such a thing. Given the above assumption, there is * no need to walk down the entire mblk chain (which could have a * potential performance problem) */ if (mp->b_datap->db_ref > 1) { mblk_t *mp1; boolean_t adjusted = B_FALSE; IP_STAT(ip_db_ref); /* * The IP_RECVSLLA option depends on having the link layer * header. First check that: * a> the underlying device is of type ether, since this * option is currently supported only over ethernet. * b> there is enough room to copy over the link layer header. * * Once the checks are done, adjust rptr so that the link layer * header will be copied via copymsg. Note that, IFT_ETHER may * be returned by some non-ethernet drivers but in this case the * second check will fail. */ if (ill->ill_type == IFT_ETHER && (mp->b_rptr - mp->b_datap->db_base) >= sizeof (struct ether_header)) { mp->b_rptr -= sizeof (struct ether_header); adjusted = B_TRUE; } mp1 = copymsg(mp); if (mp1 == NULL) { mp->b_next = NULL; /* clear b_prev - used by ip_mroute_decap */ mp->b_prev = NULL; freemsg(mp); BUMP_MIB(&ip_mib, ipInDiscards); TRACE_2(TR_FAC_IP, TR_IP_RPUT_END, "ip_rput_end: q %p (%S)", q, "copymsg"); return; } if (adjusted) { /* * Copy is done. Restore the pointer in the _new_ mblk */ mp1->b_rptr += sizeof (struct ether_header); } /* Copy b_prev - used by ip_mroute_decap */ mp1->b_prev = mp->b_prev; mp->b_prev = NULL; freemsg(mp); mp = mp1; } if (DB_TYPE(mp) == M_DATA) { dmp = mp; } else if (DB_TYPE(mp) == M_PROTO && *(t_uscalar_t *)mp->b_rptr == DL_UNITDATA_IND) { dmp = mp->b_cont; } if (dmp != NULL) { /* * IP header ptr not aligned? * OR IP header not complete in first mblk */ if (!OK_32PTR(dmp->b_rptr) || (dmp->b_wptr - dmp->b_rptr) < IP_SIMPLE_HDR_LENGTH) { if (!ip_check_and_align_header(q, dmp)) return; } } TRACE_2(TR_FAC_IP, TR_IP_RPUT_END, "ip_rput_end: q %p (%S)", q, "end"); ip_input(ill, NULL, mp, NULL); } /* * Direct read side procedure capable of dealing with chains. GLDv3 based * drivers call this function directly with mblk chains while STREAMS * read side procedure ip_rput() calls this for single packet with ip_ring * set to NULL to process one packet at a time. * * The ill will always be valid if this function is called directly from * the driver. * * If ip_input() is called from GLDv3: * * - This must be a non-VLAN IP stream. * - 'mp' is either an untagged or a special priority-tagged packet. * - Any VLAN tag that was in the MAC header has been stripped. * * Thus, there is no need to adjust b_rptr in this function. */ /* ARGSUSED */ void ip_input(ill_t *ill, ill_rx_ring_t *ip_ring, mblk_t *mp_chain, struct mac_header_info_s *mhip) { ipaddr_t dst = NULL; ipaddr_t prev_dst; ire_t *ire = NULL; ipha_t *ipha; uint_t pkt_len; ssize_t len; uint_t opt_len; int ll_multicast; int cgtp_flt_pkt; queue_t *q = ill->ill_rq; squeue_t *curr_sqp = NULL; mblk_t *head = NULL; mblk_t *tail = NULL; mblk_t *first_mp; mblk_t *mp; int cnt = 0; ASSERT(mp_chain != NULL); ASSERT(ill != NULL); TRACE_1(TR_FAC_IP, TR_IP_RPUT_START, "ip_input_start: q %p", q); #define rptr ((uchar_t *)ipha) while (mp_chain != NULL) { first_mp = mp = mp_chain; mp_chain = mp_chain->b_next; mp->b_next = NULL; ll_multicast = 0; /* * We do ire caching from one iteration to * another. In the event the packet chain contains * all packets from the same dst, this caching saves * an ire_cache_lookup for each of the succeeding * packets in a packet chain. */ prev_dst = dst; /* * ip_input fast path */ /* mblk type is not M_DATA */ if (mp->b_datap->db_type != M_DATA) { if (ip_rput_process_notdata(q, &first_mp, ill, &ll_multicast, &mp)) continue; } /* Make sure its an M_DATA and that its aligned */ ASSERT(mp->b_datap->db_type == M_DATA); ASSERT(mp->b_datap->db_ref == 1 && OK_32PTR(mp->b_rptr)); ipha = (ipha_t *)mp->b_rptr; len = mp->b_wptr - rptr; BUMP_MIB(&ip_mib, ipInReceives); /* multiple mblk or too short */ pkt_len = ntohs(ipha->ipha_length); len -= pkt_len; if (len != 0) { /* * Make sure we have data length consistent * with the IP header. */ if (mp->b_cont == NULL) { if (len < 0 || pkt_len < IP_SIMPLE_HDR_LENGTH) { BUMP_MIB(&ip_mib, ipInHdrErrors); ip2dbg(("ip_input: drop pkt\n")); freemsg(mp); continue; } mp->b_wptr = rptr + pkt_len; } else if (len += msgdsize(mp->b_cont)) { if (len < 0 || pkt_len < IP_SIMPLE_HDR_LENGTH) { BUMP_MIB(&ip_mib, ipInHdrErrors); ip2dbg(("ip_input: drop pkt\n")); freemsg(mp); continue; } (void) adjmsg(mp, -len); IP_STAT(ip_multimblk3); } } /* Obtain the dst of the current packet */ dst = ipha->ipha_dst; if (IP_LOOPBACK_ADDR(dst) || IP_LOOPBACK_ADDR(ipha->ipha_src)) { BUMP_MIB(&ip_mib, ipInAddrErrors); cmn_err(CE_CONT, "dst %X src %X\n", dst, ipha->ipha_src); freemsg(mp); continue; } /* * The event for packets being received from a 'physical' * interface is placed after validation of the source and/or * destination address as being local so that packets can be * redirected to loopback addresses using ipnat. */ DTRACE_PROBE4(ip4__physical__in__start, ill_t *, ill, ill_t *, NULL, ipha_t *, ipha, mblk_t *, first_mp); FW_HOOKS(ip4_physical_in_event, ipv4firewall_physical_in, ill, NULL, ipha, first_mp, mp); DTRACE_PROBE1(ip4__physical__in__end, mblk_t *, first_mp); if (first_mp == NULL) { continue; } dst = ipha->ipha_dst; /* * Attach any necessary label information to * this packet */ if (is_system_labeled() && !tsol_get_pkt_label(mp, IPV4_VERSION)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); continue; } /* * Reuse the cached ire only if the ipha_dst of the previous * packet is the same as the current packet AND it is not * INADDR_ANY. */ if (!(dst == prev_dst && dst != INADDR_ANY) && (ire != NULL)) { ire_refrele(ire); ire = NULL; } opt_len = ipha->ipha_version_and_hdr_length - IP_SIMPLE_HDR_VERSION; /* * Check to see if we can take the fastpath. * That is possible if the following conditions are met * o Tsol disabled * o CGTP disabled * o ipp_action_count is 0 * o Mobile IP not running * o no options in the packet * o not a RSVP packet * o not a multicast packet */ if (!is_system_labeled() && !ip_cgtp_filter && ipp_action_count == 0 && ill->ill_mrtun_refcnt == 0 && ill->ill_srcif_refcnt == 0 && opt_len == 0 && ipha->ipha_protocol != IPPROTO_RSVP && !ll_multicast && !CLASSD(dst)) { if (ire == NULL) ire = ire_cache_lookup(dst, ALL_ZONES, NULL); /* incoming packet is for forwarding */ if (ire == NULL || (ire->ire_type & IRE_CACHE)) { ire = ip_fast_forward(ire, dst, ill, mp); continue; } /* incoming packet is for local consumption */ if (ire->ire_type & IRE_LOCAL) goto local; } /* * Disable ire caching for anything more complex * than the simple fast path case we checked for above. */ if (ire != NULL) { ire_refrele(ire); ire = NULL; } /* Full-blown slow path */ if (opt_len != 0) { if (len != 0) IP_STAT(ip_multimblk4); else IP_STAT(ip_ipoptions); if (!ip_rput_multimblk_ipoptions(q, mp, &ipha, &dst)) continue; } /* * Invoke the CGTP (multirouting) filtering module to process * the incoming packet. Packets identified as duplicates * must be discarded. Filtering is active only if the * the ip_cgtp_filter ndd variable is non-zero. */ cgtp_flt_pkt = CGTP_IP_PKT_NOT_CGTP; if (ip_cgtp_filter && (ip_cgtp_filter_ops != NULL)) { cgtp_flt_pkt = ip_cgtp_filter_ops->cfo_filter(q, mp); if (cgtp_flt_pkt == CGTP_IP_PKT_DUPLICATE) { freemsg(first_mp); continue; } } /* * If rsvpd is running, let RSVP daemon handle its processing * and forwarding of RSVP multicast/unicast packets. * If rsvpd is not running but mrouted is running, RSVP * multicast packets are forwarded as multicast traffic * and RSVP unicast packets are forwarded by unicast router. * If neither rsvpd nor mrouted is running, RSVP multicast * packets are not forwarded, but the unicast packets are * forwarded like unicast traffic. */ if (ipha->ipha_protocol == IPPROTO_RSVP && ipcl_proto_search(IPPROTO_RSVP) != NULL) { /* RSVP packet and rsvpd running. Treat as ours */ ip2dbg(("ip_input: RSVP for us: 0x%x\n", ntohl(dst))); /* * This assumes that we deliver to all streams for * multicast and broadcast packets. * We have to force ll_multicast to 1 to handle the * M_DATA messages passed in from ip_mroute_decap. */ dst = INADDR_BROADCAST; ll_multicast = 1; } else if (CLASSD(dst)) { /* packet is multicast */ mp->b_next = NULL; if (ip_rput_process_multicast(q, mp, ill, ipha, &ll_multicast, &dst)) continue; } /* * Check if the packet is coming from the Mobile IP * forward tunnel interface */ if (ill->ill_srcif_refcnt > 0) { ire = ire_srcif_table_lookup(dst, IRE_INTERFACE, NULL, ill, MATCH_IRE_TYPE); if (ire != NULL && ire->ire_nce->nce_res_mp == NULL && ire->ire_ipif->ipif_net_type == IRE_IF_RESOLVER) { /* We need to resolve the link layer info */ ire_refrele(ire); ire = NULL; (void) ip_rput_noire(q, (ill_t *)q->q_ptr, mp, ll_multicast, dst); continue; } } if (ire == NULL) { ire = ire_cache_lookup(dst, ALL_ZONES, MBLK_GETLABEL(mp)); } /* * If mipagent is running and reverse tunnel is created as per * mobile node request, then any packet coming through the * incoming interface from the mobile-node, should be reverse * tunneled to it's home agent except those that are destined * to foreign agent only. * This needs source address based ire lookup. The routing * entries for source address based lookup are only created by * mipagent program only when a reverse tunnel is created. * Reference : RFC2002, RFC2344 */ if (ill->ill_mrtun_refcnt > 0) { ipaddr_t srcaddr; ire_t *tmp_ire; tmp_ire = ire; /* Save, we might need it later */ if (ire == NULL || (ire->ire_type != IRE_LOCAL && ire->ire_type != IRE_BROADCAST)) { srcaddr = ipha->ipha_src; ire = ire_mrtun_lookup(srcaddr, ill); if (ire != NULL) { /* * Should not be getting iphada packet * here. we should only get those for * IRE_LOCAL traffic, excluded above. * Fail-safe (drop packet) in the event * hardware is misbehaving. */ if (first_mp != mp) { /* IPsec KSTATS: beancount me */ freemsg(first_mp); } else { /* * This packet must be forwarded * to Reverse Tunnel */ ip_mrtun_forward(ire, ill, mp); } ire_refrele(ire); ire = NULL; if (tmp_ire != NULL) { ire_refrele(tmp_ire); tmp_ire = NULL; } TRACE_2(TR_FAC_IP, TR_IP_RPUT_END, "ip_input_end: q %p (%S)", q, "uninit"); continue; } } /* * If this packet is from a non-mobilenode or a * mobile-node which does not request reverse * tunnel service */ ire = tmp_ire; } /* * If we reach here that means the incoming packet satisfies * one of the following conditions: * - packet is from a mobile node which does not request * reverse tunnel * - packet is from a non-mobile node, which is the most * common case * - packet is from a reverse tunnel enabled mobile node * and destined to foreign agent only */ if (ire == NULL) { /* * No IRE for this destination, so it can't be for us. * Unless we are forwarding, drop the packet. * We have to let source routed packets through * since we don't yet know if they are 'ping -l' * packets i.e. if they will go out over the * same interface as they came in on. */ ire = ip_rput_noire(q, NULL, mp, ll_multicast, dst); if (ire == NULL) continue; } /* * Broadcast IRE may indicate either broadcast or * multicast packet */ if (ire->ire_type == IRE_BROADCAST) { /* * Skip broadcast checks if packet is UDP multicast; * we'd rather not enter ip_rput_process_broadcast() * unless the packet is broadcast for real, since * that routine is a no-op for multicast. */ if (ipha->ipha_protocol != IPPROTO_UDP || !CLASSD(ipha->ipha_dst)) { ire = ip_rput_process_broadcast(&q, mp, ire, ipha, ill, dst, cgtp_flt_pkt, ll_multicast); if (ire == NULL) continue; } } else if (ire->ire_stq != NULL) { /* fowarding? */ ip_rput_process_forward(q, mp, ire, ipha, ill, ll_multicast); /* ip_rput_process_forward consumed the packet */ continue; } local: /* packet not for us */ if (ire->ire_rfq != q) { if (ip_rput_notforus(&q, mp, ire, ill)) continue; } switch (ipha->ipha_protocol) { case IPPROTO_TCP: ASSERT(first_mp == mp); if ((mp = ip_tcp_input(mp, ipha, ill, B_FALSE, ire, mp, 0, q, ip_ring)) != NULL) { if (curr_sqp == NULL) { curr_sqp = GET_SQUEUE(mp); ASSERT(cnt == 0); cnt++; head = tail = mp; } else if (curr_sqp == GET_SQUEUE(mp)) { ASSERT(tail != NULL); cnt++; tail->b_next = mp; tail = mp; } else { /* * A different squeue. Send the * chain for the previous squeue on * its way. This shouldn't happen * often unless interrupt binding * changes. */ IP_STAT(ip_input_multi_squeue); squeue_enter_chain(curr_sqp, head, tail, cnt, SQTAG_IP_INPUT); curr_sqp = GET_SQUEUE(mp); head = mp; tail = mp; cnt = 1; } } continue; case IPPROTO_UDP: ASSERT(first_mp == mp); ip_udp_input(q, mp, ipha, ire, ill); continue; case IPPROTO_SCTP: ASSERT(first_mp == mp); ip_sctp_input(mp, ipha, ill, B_FALSE, ire, mp, 0, q, dst); /* ire has been released by ip_sctp_input */ ire = NULL; continue; default: ip_proto_input(q, first_mp, ipha, ire, ill); continue; } } if (ire != NULL) ire_refrele(ire); if (head != NULL) squeue_enter_chain(curr_sqp, head, tail, cnt, SQTAG_IP_INPUT); /* * This code is there just to make netperf/ttcp look good. * * Its possible that after being in polling mode (and having cleared * the backlog), squeues have turned the interrupt frequency higher * to improve latency at the expense of more CPU utilization (less * packets per interrupts or more number of interrupts). Workloads * like ttcp/netperf do manage to tickle polling once in a while * but for the remaining time, stay in higher interrupt mode since * their packet arrival rate is pretty uniform and this shows up * as higher CPU utilization. Since people care about CPU utilization * while running netperf/ttcp, turn the interrupt frequency back to * normal/default if polling has not been used in ip_poll_normal_ticks. */ if (ip_ring != NULL && (ip_ring->rr_poll_state & ILL_POLLING)) { if (lbolt >= (ip_ring->rr_poll_time + ip_poll_normal_ticks)) { ip_ring->rr_poll_state &= ~ILL_POLLING; ip_ring->rr_blank(ip_ring->rr_handle, ip_ring->rr_normal_blank_time, ip_ring->rr_normal_pkt_cnt); } } TRACE_2(TR_FAC_IP, TR_IP_RPUT_END, "ip_input_end: q %p (%S)", q, "end"); #undef rptr } static void ip_dlpi_error(ill_t *ill, t_uscalar_t prim, t_uscalar_t dl_err, t_uscalar_t err) { if (dl_err == DL_SYSERR) { (void) mi_strlog(ill->ill_rq, 1, SL_CONSOLE|SL_ERROR|SL_TRACE, "%s: %s failed: DL_SYSERR (errno %u)\n", ill->ill_name, dlpi_prim_str(prim), err); return; } (void) mi_strlog(ill->ill_rq, 1, SL_CONSOLE|SL_ERROR|SL_TRACE, "%s: %s failed: %s\n", ill->ill_name, dlpi_prim_str(prim), dlpi_err_str(dl_err)); } /* * ip_rput_dlpi is called by ip_rput to handle all DLPI messages other * than DL_UNITDATA_IND messages. If we need to process this message * exclusively, we call qwriter_ip, in which case we also need to call * ill_refhold before that, since qwriter_ip does an ill_refrele. */ void ip_rput_dlpi(queue_t *q, mblk_t *mp) { dl_ok_ack_t *dloa = (dl_ok_ack_t *)mp->b_rptr; dl_error_ack_t *dlea = (dl_error_ack_t *)dloa; ill_t *ill; ip1dbg(("ip_rput_dlpi")); ill = (ill_t *)q->q_ptr; switch (dloa->dl_primitive) { case DL_ERROR_ACK: ip2dbg(("ip_rput_dlpi(%s): DL_ERROR_ACK %s (0x%x): " "%s (0x%x), unix %u\n", ill->ill_name, dlpi_prim_str(dlea->dl_error_primitive), dlea->dl_error_primitive, dlpi_err_str(dlea->dl_errno), dlea->dl_errno, dlea->dl_unix_errno)); switch (dlea->dl_error_primitive) { case DL_UNBIND_REQ: mutex_enter(&ill->ill_lock); ill->ill_state_flags &= ~ILL_DL_UNBIND_IN_PROGRESS; cv_signal(&ill->ill_cv); mutex_exit(&ill->ill_lock); /* FALLTHRU */ case DL_NOTIFY_REQ: case DL_ATTACH_REQ: case DL_DETACH_REQ: case DL_INFO_REQ: case DL_BIND_REQ: case DL_ENABMULTI_REQ: case DL_PHYS_ADDR_REQ: case DL_CAPABILITY_REQ: case DL_CONTROL_REQ: /* * Refhold the ill to match qwriter_ip which does a * refrele. Since this is on the ill stream we * unconditionally bump up the refcount without * checking for ILL_CAN_LOOKUP */ ill_refhold(ill); (void) qwriter_ip(NULL, ill, q, mp, ip_rput_dlpi_writer, CUR_OP, B_FALSE); return; case DL_DISABMULTI_REQ: freemsg(mp); /* Don't want to pass this up */ return; default: break; } ip_dlpi_error(ill, dlea->dl_error_primitive, dlea->dl_errno, dlea->dl_unix_errno); freemsg(mp); return; case DL_INFO_ACK: case DL_BIND_ACK: case DL_PHYS_ADDR_ACK: case DL_NOTIFY_ACK: case DL_CAPABILITY_ACK: case DL_CONTROL_ACK: /* * Refhold the ill to match qwriter_ip which does a refrele * Since this is on the ill stream we unconditionally * bump up the refcount without doing ILL_CAN_LOOKUP. */ ill_refhold(ill); (void) qwriter_ip(NULL, ill, q, mp, ip_rput_dlpi_writer, CUR_OP, B_FALSE); return; case DL_NOTIFY_IND: ill_refhold(ill); /* * The DL_NOTIFY_IND is an asynchronous message that has no * relation to the current ioctl in progress (if any). Hence we * pass in NEW_OP in this case. */ (void) qwriter_ip(NULL, ill, q, mp, ip_rput_dlpi_writer, NEW_OP, B_FALSE); return; case DL_OK_ACK: ip1dbg(("ip_rput: DL_OK_ACK for %s\n", dlpi_prim_str((int)dloa->dl_correct_primitive))); switch (dloa->dl_correct_primitive) { case DL_UNBIND_REQ: mutex_enter(&ill->ill_lock); ill->ill_state_flags &= ~ILL_DL_UNBIND_IN_PROGRESS; cv_signal(&ill->ill_cv); mutex_exit(&ill->ill_lock); /* FALLTHRU */ case DL_ATTACH_REQ: case DL_DETACH_REQ: /* * Refhold the ill to match qwriter_ip which does a * refrele. Since this is on the ill stream we * unconditionally bump up the refcount */ ill_refhold(ill); qwriter_ip(NULL, ill, q, mp, ip_rput_dlpi_writer, CUR_OP, B_FALSE); return; case DL_ENABMULTI_REQ: if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS) ill->ill_dlpi_multicast_state = IDS_OK; break; } break; default: break; } freemsg(mp); } /* * Handling of DLPI messages that require exclusive access to the ipsq. * * Need to do ill_pending_mp_release on ioctl completion, which could * happen here. (along with mi_copy_done) */ /* ARGSUSED */ static void ip_rput_dlpi_writer(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg) { dl_ok_ack_t *dloa = (dl_ok_ack_t *)mp->b_rptr; dl_error_ack_t *dlea = (dl_error_ack_t *)dloa; int err = 0; ill_t *ill; ipif_t *ipif = NULL; mblk_t *mp1 = NULL; conn_t *connp = NULL; t_uscalar_t physaddr_req; mblk_t *mp_hw; union DL_primitives *dlp; boolean_t success; boolean_t ioctl_aborted = B_FALSE; boolean_t log = B_TRUE; hook_nic_event_t *info; ip1dbg(("ip_rput_dlpi_writer ..")); ill = (ill_t *)q->q_ptr; ASSERT(ipsq == ill->ill_phyint->phyint_ipsq); ASSERT(IAM_WRITER_ILL(ill)); /* * ipsq_pending_mp and ipsq_pending_ipif track each other. i.e. * both are null or non-null. However we can assert that only * after grabbing the ipsq_lock. So we don't make any assertion * here and in other places in the code. */ ipif = ipsq->ipsq_pending_ipif; /* * The current ioctl could have been aborted by the user and a new * ioctl to bring up another ill could have started. We could still * get a response from the driver later. */ if (ipif != NULL && ipif->ipif_ill != ill) ioctl_aborted = B_TRUE; switch (dloa->dl_primitive) { case DL_ERROR_ACK: switch (dlea->dl_error_primitive) { case DL_UNBIND_REQ: case DL_ATTACH_REQ: case DL_DETACH_REQ: case DL_INFO_REQ: ill_dlpi_done(ill, dlea->dl_error_primitive); break; case DL_NOTIFY_REQ: ill_dlpi_done(ill, DL_NOTIFY_REQ); log = B_FALSE; break; case DL_PHYS_ADDR_REQ: /* * For IPv6 only, there are two additional * phys_addr_req's sent to the driver to get the * IPv6 token and lla. This allows IP to acquire * the hardware address format for a given interface * without having built in knowledge of the hardware * address. ill_phys_addr_pend keeps track of the last * DL_PAR sent so we know which response we are * dealing with. ill_dlpi_done will update * ill_phys_addr_pend when it sends the next req. * We don't complete the IOCTL until all three DL_PARs * have been attempted, so set *_len to 0 and break. */ physaddr_req = ill->ill_phys_addr_pend; ill_dlpi_done(ill, DL_PHYS_ADDR_REQ); if (physaddr_req == DL_IPV6_TOKEN) { ill->ill_token_length = 0; log = B_FALSE; break; } else if (physaddr_req == DL_IPV6_LINK_LAYER_ADDR) { ill->ill_nd_lla_len = 0; log = B_FALSE; break; } /* * Something went wrong with the DL_PHYS_ADDR_REQ. * We presumably have an IOCTL hanging out waiting * for completion. Find it and complete the IOCTL * with the error noted. * However, ill_dl_phys was called on an ill queue * (from SIOCSLIFNAME), thus conn_pending_ill is not * set. But the ioctl is known to be pending on ill_wq. */ if (!ill->ill_ifname_pending) break; ill->ill_ifname_pending = 0; if (!ioctl_aborted) mp1 = ipsq_pending_mp_get(ipsq, &connp); if (mp1 != NULL) { /* * This operation (SIOCSLIFNAME) must have * happened on the ill. Assert there is no conn */ ASSERT(connp == NULL); q = ill->ill_wq; } break; case DL_BIND_REQ: ill_dlpi_done(ill, DL_BIND_REQ); if (ill->ill_ifname_pending) break; /* * Something went wrong with the bind. We presumably * have an IOCTL hanging out waiting for completion. * Find it, take down the interface that was coming * up, and complete the IOCTL with the error noted. */ if (!ioctl_aborted) mp1 = ipsq_pending_mp_get(ipsq, &connp); if (mp1 != NULL) { /* * This operation (SIOCSLIFFLAGS) must have * happened from a conn. */ ASSERT(connp != NULL); q = CONNP_TO_WQ(connp); if (ill->ill_move_in_progress) { ILL_CLEAR_MOVE(ill); } (void) ipif_down(ipif, NULL, NULL); /* error is set below the switch */ } break; case DL_ENABMULTI_REQ: ip1dbg(("DL_ERROR_ACK to enabmulti\n")); if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS) ill->ill_dlpi_multicast_state = IDS_FAILED; if (ill->ill_dlpi_multicast_state == IDS_FAILED) { ipif_t *ipif; log = B_FALSE; printf("ip: joining multicasts failed (%d)" " on %s - will use link layer " "broadcasts for multicast\n", dlea->dl_errno, ill->ill_name); /* * Set up the multicast mapping alone. * writer, so ok to access ill->ill_ipif * without any lock. */ ipif = ill->ill_ipif; mutex_enter(&ill->ill_phyint->phyint_lock); ill->ill_phyint->phyint_flags |= PHYI_MULTI_BCAST; mutex_exit(&ill->ill_phyint->phyint_lock); if (!ill->ill_isv6) { (void) ipif_arp_setup_multicast(ipif, NULL); } else { (void) ipif_ndp_setup_multicast(ipif, NULL); } } freemsg(mp); /* Don't want to pass this up */ return; case DL_CAPABILITY_REQ: case DL_CONTROL_REQ: ip1dbg(("ip_rput_dlpi_writer: got DL_ERROR_ACK for " "DL_CAPABILITY/CONTROL REQ\n")); ill_dlpi_done(ill, dlea->dl_error_primitive); ill->ill_dlpi_capab_state = IDS_FAILED; freemsg(mp); return; } /* * Note the error for IOCTL completion (mp1 is set when * ready to complete ioctl). If ill_ifname_pending_err is * set, an error occured during plumbing (ill_ifname_pending), * so we want to report that error. * * NOTE: there are two addtional DL_PHYS_ADDR_REQ's * (DL_IPV6_TOKEN and DL_IPV6_LINK_LAYER_ADDR) that are * expected to get errack'd if the driver doesn't support * these flags (e.g. ethernet). log will be set to B_FALSE * if these error conditions are encountered. */ if (mp1 != NULL) { if (ill->ill_ifname_pending_err != 0) { err = ill->ill_ifname_pending_err; ill->ill_ifname_pending_err = 0; } else { err = dlea->dl_unix_errno ? dlea->dl_unix_errno : ENXIO; } /* * If we're plumbing an interface and an error hasn't already * been saved, set ill_ifname_pending_err to the error passed * up. Ignore the error if log is B_FALSE (see comment above). */ } else if (log && ill->ill_ifname_pending && ill->ill_ifname_pending_err == 0) { ill->ill_ifname_pending_err = dlea->dl_unix_errno ? dlea->dl_unix_errno : ENXIO; } if (log) ip_dlpi_error(ill, dlea->dl_error_primitive, dlea->dl_errno, dlea->dl_unix_errno); break; case DL_CAPABILITY_ACK: { boolean_t reneg_flag = B_FALSE; /* Call a routine to handle this one. */ ill_dlpi_done(ill, DL_CAPABILITY_REQ); /* * Check if the ACK is due to renegotiation case since we * will need to send a new CAPABILITY_REQ later. */ if (ill->ill_dlpi_capab_state == IDS_RENEG) { /* This is the ack for a renogiation case */ reneg_flag = B_TRUE; ill->ill_dlpi_capab_state = IDS_UNKNOWN; } ill_capability_ack(ill, mp); if (reneg_flag) ill_capability_probe(ill); break; } case DL_CONTROL_ACK: /* We treat all of these as "fire and forget" */ ill_dlpi_done(ill, DL_CONTROL_REQ); break; case DL_INFO_ACK: /* Call a routine to handle this one. */ ill_dlpi_done(ill, DL_INFO_REQ); ip_ll_subnet_defaults(ill, mp); ASSERT(!MUTEX_HELD(&ill->ill_phyint->phyint_ipsq->ipsq_lock)); return; case DL_BIND_ACK: /* * We should have an IOCTL waiting on this unless * sent by ill_dl_phys, in which case just return */ ill_dlpi_done(ill, DL_BIND_REQ); if (ill->ill_ifname_pending) break; if (!ioctl_aborted) mp1 = ipsq_pending_mp_get(ipsq, &connp); if (mp1 == NULL) break; ASSERT(connp != NULL); q = CONNP_TO_WQ(connp); /* * We are exclusive. So nothing can change even after * we get the pending mp. If need be we can put it back * and restart, as in calling ipif_arp_up() below. */ ip1dbg(("ip_rput_dlpi: bind_ack %s\n", ill->ill_name)); mutex_enter(&ill->ill_lock); ill->ill_dl_up = 1; if ((info = ill->ill_nic_event_info) != NULL) { ip2dbg(("ip_rput_dlpi_writer: unexpected nic event %d " "attached for %s\n", info->hne_event, ill->ill_name)); if (info->hne_data != NULL) kmem_free(info->hne_data, info->hne_datalen); kmem_free(info, sizeof (hook_nic_event_t)); } info = kmem_alloc(sizeof (hook_nic_event_t), KM_NOSLEEP); if (info != NULL) { info->hne_nic = ill->ill_phyint->phyint_ifindex; info->hne_lif = 0; info->hne_event = NE_UP; info->hne_data = NULL; info->hne_datalen = 0; info->hne_family = ill->ill_isv6 ? ipv6 : ipv4; } else ip2dbg(("ip_rput_dlpi_writer: could not attach UP nic " "event information for %s (ENOMEM)\n", ill->ill_name)); ill->ill_nic_event_info = info; mutex_exit(&ill->ill_lock); /* * Now bring up the resolver; when that is complete, we'll * create IREs. Note that we intentionally mirror what * ipif_up() would have done, because we got here by way of * ill_dl_up(), which stopped ipif_up()'s processing. */ if (ill->ill_isv6) { /* * v6 interfaces. * Unlike ARP which has to do another bind * and attach, once we get here we are * done with NDP. Except in the case of * ILLF_XRESOLV, in which case we send an * AR_INTERFACE_UP to the external resolver. * If all goes well, the ioctl will complete * in ip_rput(). If there's an error, we * complete it here. */ err = ipif_ndp_up(ipif, &ipif->ipif_v6lcl_addr, B_FALSE); if (err == 0) { if (ill->ill_flags & ILLF_XRESOLV) { mutex_enter(&connp->conn_lock); mutex_enter(&ill->ill_lock); success = ipsq_pending_mp_add( connp, ipif, q, mp1, 0); mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); if (success) { err = ipif_resolver_up(ipif, Res_act_initial); if (err == EINPROGRESS) { freemsg(mp); return; } ASSERT(err != 0); mp1 = ipsq_pending_mp_get(ipsq, &connp); ASSERT(mp1 != NULL); } else { /* conn has started closing */ err = EINTR; } } else { /* Non XRESOLV interface */ (void) ipif_resolver_up(ipif, Res_act_initial); err = ipif_up_done_v6(ipif); } } } else if (ill->ill_net_type == IRE_IF_RESOLVER) { /* * ARP and other v4 external resolvers. * Leave the pending mblk intact so that * the ioctl completes in ip_rput(). */ mutex_enter(&connp->conn_lock); mutex_enter(&ill->ill_lock); success = ipsq_pending_mp_add(connp, ipif, q, mp1, 0); mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); if (success) { err = ipif_resolver_up(ipif, Res_act_initial); if (err == EINPROGRESS) { freemsg(mp); return; } ASSERT(err != 0); mp1 = ipsq_pending_mp_get(ipsq, &connp); } else { /* The conn has started closing */ err = EINTR; } } else { /* * This one is complete. Reply to pending ioctl. */ (void) ipif_resolver_up(ipif, Res_act_initial); err = ipif_up_done(ipif); } if ((err == 0) && (ill->ill_up_ipifs)) { err = ill_up_ipifs(ill, q, mp1); if (err == EINPROGRESS) { freemsg(mp); return; } } if (ill->ill_up_ipifs) { ill_group_cleanup(ill); } break; case DL_NOTIFY_IND: { dl_notify_ind_t *notify = (dl_notify_ind_t *)mp->b_rptr; ire_t *ire; boolean_t need_ire_walk_v4 = B_FALSE; boolean_t need_ire_walk_v6 = B_FALSE; /* * Change the address everywhere we need to. * What we're getting here is a link-level addr or phys addr. * The new addr is at notify + notify->dl_addr_offset * The address length is notify->dl_addr_length; */ switch (notify->dl_notification) { case DL_NOTE_PHYS_ADDR: mp_hw = copyb(mp); if (mp_hw == NULL) { err = ENOMEM; break; } dlp = (union DL_primitives *)mp_hw->b_rptr; /* * We currently don't support changing * the token via DL_NOTIFY_IND. * When we do support it, we have to consider * what the implications are with respect to * the token and the link local address. */ mutex_enter(&ill->ill_lock); if (dlp->notify_ind.dl_data == DL_IPV6_LINK_LAYER_ADDR) { if (ill->ill_nd_lla_mp != NULL) freemsg(ill->ill_nd_lla_mp); ill->ill_nd_lla_mp = mp_hw; ill->ill_nd_lla = (uchar_t *)mp_hw->b_rptr + dlp->notify_ind.dl_addr_offset; ill->ill_nd_lla_len = dlp->notify_ind.dl_addr_length - ABS(ill->ill_sap_length); mutex_exit(&ill->ill_lock); break; } else if (dlp->notify_ind.dl_data == DL_CURR_PHYS_ADDR) { if (ill->ill_phys_addr_mp != NULL) freemsg(ill->ill_phys_addr_mp); ill->ill_phys_addr_mp = mp_hw; ill->ill_phys_addr = (uchar_t *)mp_hw->b_rptr + dlp->notify_ind.dl_addr_offset; ill->ill_phys_addr_length = dlp->notify_ind.dl_addr_length - ABS(ill->ill_sap_length); if (ill->ill_isv6 && !(ill->ill_flags & ILLF_XRESOLV)) { if (ill->ill_nd_lla_mp != NULL) freemsg(ill->ill_nd_lla_mp); ill->ill_nd_lla_mp = copyb(mp_hw); ill->ill_nd_lla = (uchar_t *) ill->ill_nd_lla_mp->b_rptr + dlp->notify_ind.dl_addr_offset; ill->ill_nd_lla_len = ill->ill_phys_addr_length; } } mutex_exit(&ill->ill_lock); /* * Send out gratuitous arp request for our new * hardware address. */ for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (!(ipif->ipif_flags & IPIF_UP)) continue; if (ill->ill_isv6) { ipif_ndp_down(ipif); /* * Set B_TRUE to enable * ipif_ndp_up() to send out * unsolicited advertisements. */ err = ipif_ndp_up(ipif, &ipif->ipif_v6lcl_addr, B_TRUE); if (err) { ip1dbg(( "ip_rput_dlpi_writer: " "Failed to update ndp " "err %d\n", err)); } } else { /* * IPv4 ARP case * * Set Res_act_move, as we only want * ipif_resolver_up to send an * AR_ENTRY_ADD request up to * ARP. */ err = ipif_resolver_up(ipif, Res_act_move); if (err) { ip1dbg(( "ip_rput_dlpi_writer: " "Failed to update arp " "err %d\n", err)); } } } /* * Allow "fall through" to the DL_NOTE_FASTPATH_FLUSH * case so that all old fastpath information can be * purged from IRE caches. */ /* FALLTHRU */ case DL_NOTE_FASTPATH_FLUSH: /* * Any fastpath probe sent henceforth will get the * new fp mp. So we first delete any ires that are * waiting for the fastpath. Then walk all ires and * delete the ire or delete the fp mp. In the case of * IRE_MIPRTUN and IRE_BROADCAST it is difficult to * recreate the ire's without going through a complex * ipif up/down dance. So we don't delete the ire * itself, but just the nce_fp_mp for these 2 ire's * In the case of the other ire's we delete the ire's * themselves. Access to nce_fp_mp is completely * protected by ire_lock for IRE_MIPRTUN and * IRE_BROADCAST. Deleting the ire is preferable in the * other cases for performance. */ if (ill->ill_isv6) { nce_fastpath_list_dispatch(ill, NULL, NULL); ndp_walk(ill, (pfi_t)ndp_fastpath_flush, NULL); } else { ire_fastpath_list_dispatch(ill, NULL, NULL); ire_walk_ill_v4(MATCH_IRE_WQ | MATCH_IRE_TYPE, IRE_CACHE | IRE_BROADCAST, ire_fastpath_flush, NULL, ill); mutex_enter(&ire_mrtun_lock); if (ire_mrtun_count != 0) { mutex_exit(&ire_mrtun_lock); ire_walk_ill_mrtun(MATCH_IRE_WQ, IRE_MIPRTUN, ire_fastpath_flush, NULL, ill); } else { mutex_exit(&ire_mrtun_lock); } } break; case DL_NOTE_SDU_SIZE: /* * Change the MTU size of the interface, of all * attached ipif's, and of all relevant ire's. The * new value's a uint32_t at notify->dl_data. * Mtu change Vs. new ire creation - protocol below. * * a Mark the ipif as IPIF_CHANGING. * b Set the new mtu in the ipif. * c Change the ire_max_frag on all affected ires * d Unmark the IPIF_CHANGING * * To see how the protocol works, assume an interface * route is also being added simultaneously by * ip_rt_add and let 'ipif' be the ipif referenced by * the ire. If the ire is created before step a, * it will be cleaned up by step c. If the ire is * created after step d, it will see the new value of * ipif_mtu. Any attempt to create the ire between * steps a to d will fail because of the IPIF_CHANGING * flag. Note that ire_create() is passed a pointer to * the ipif_mtu, and not the value. During ire_add * under the bucket lock, the ire_max_frag of the * new ire being created is set from the ipif/ire from * which it is being derived. */ mutex_enter(&ill->ill_lock); ill->ill_max_frag = (uint_t)notify->dl_data; /* * If an SIOCSLIFLNKINFO has changed the ill_max_mtu * leave it alone */ if (ill->ill_mtu_userspecified) { mutex_exit(&ill->ill_lock); break; } ill->ill_max_mtu = ill->ill_max_frag; if (ill->ill_isv6) { if (ill->ill_max_mtu < IPV6_MIN_MTU) ill->ill_max_mtu = IPV6_MIN_MTU; } else { if (ill->ill_max_mtu < IP_MIN_MTU) ill->ill_max_mtu = IP_MIN_MTU; } for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { /* * Don't override the mtu if the user * has explicitly set it. */ if (ipif->ipif_flags & IPIF_FIXEDMTU) continue; ipif->ipif_mtu = (uint_t)notify->dl_data; if (ipif->ipif_isv6) ire = ipif_to_ire_v6(ipif); else ire = ipif_to_ire(ipif); if (ire != NULL) { ire->ire_max_frag = ipif->ipif_mtu; ire_refrele(ire); } if (ipif->ipif_flags & IPIF_UP) { if (ill->ill_isv6) need_ire_walk_v6 = B_TRUE; else need_ire_walk_v4 = B_TRUE; } } mutex_exit(&ill->ill_lock); if (need_ire_walk_v4) ire_walk_v4(ill_mtu_change, (char *)ill, ALL_ZONES); if (need_ire_walk_v6) ire_walk_v6(ill_mtu_change, (char *)ill, ALL_ZONES); break; case DL_NOTE_LINK_UP: case DL_NOTE_LINK_DOWN: { /* * We are writer. ill / phyint / ipsq assocs stable. * The RUNNING flag reflects the state of the link. */ phyint_t *phyint = ill->ill_phyint; uint64_t new_phyint_flags; boolean_t changed = B_FALSE; boolean_t went_up; went_up = notify->dl_notification == DL_NOTE_LINK_UP; mutex_enter(&phyint->phyint_lock); new_phyint_flags = went_up ? phyint->phyint_flags | PHYI_RUNNING : phyint->phyint_flags & ~PHYI_RUNNING; if (new_phyint_flags != phyint->phyint_flags) { phyint->phyint_flags = new_phyint_flags; changed = B_TRUE; } mutex_exit(&phyint->phyint_lock); /* * ill_restart_dad handles the DAD restart and routing * socket notification logic. */ if (changed) { ill_restart_dad(phyint->phyint_illv4, went_up); ill_restart_dad(phyint->phyint_illv6, went_up); } break; } case DL_NOTE_PROMISC_ON_PHYS: IPSECHW_DEBUG(IPSECHW_PKT, ("ip_rput_dlpi_writer: " "got a DL_NOTE_PROMISC_ON_PHYS\n")); mutex_enter(&ill->ill_lock); ill->ill_promisc_on_phys = B_TRUE; mutex_exit(&ill->ill_lock); break; case DL_NOTE_PROMISC_OFF_PHYS: IPSECHW_DEBUG(IPSECHW_PKT, ("ip_rput_dlpi_writer: " "got a DL_NOTE_PROMISC_OFF_PHYS\n")); mutex_enter(&ill->ill_lock); ill->ill_promisc_on_phys = B_FALSE; mutex_exit(&ill->ill_lock); break; case DL_NOTE_CAPAB_RENEG: /* * Something changed on the driver side. * It wants us to renegotiate the capabilities * on this ill. The most likely cause is the * aggregation interface under us where a * port got added or went away. * * We reset the capabilities and set the * state to IDS_RENG so that when the ack * comes back, we can start the * renegotiation process. */ ill_capability_reset(ill); ill->ill_dlpi_capab_state = IDS_RENEG; break; default: ip0dbg(("ip_rput_dlpi_writer: unknown notification " "type 0x%x for DL_NOTIFY_IND\n", notify->dl_notification)); break; } /* * As this is an asynchronous operation, we * should not call ill_dlpi_done */ break; } case DL_NOTIFY_ACK: { dl_notify_ack_t *noteack = (dl_notify_ack_t *)mp->b_rptr; if (noteack->dl_notifications & DL_NOTE_LINK_UP) ill->ill_note_link = 1; ill_dlpi_done(ill, DL_NOTIFY_REQ); break; } case DL_PHYS_ADDR_ACK: { /* * We should have an IOCTL waiting on this when request * sent by ill_dl_phys. * However, ill_dl_phys was called on an ill queue (from * SIOCSLIFNAME), thus conn_pending_ill is not set. But the * ioctl is known to be pending on ill_wq. * There are two additional phys_addr_req's sent to the * driver to get the token and lla. ill_phys_addr_pend * keeps track of the last one sent so we know which * response we are dealing with. ill_dlpi_done will * update ill_phys_addr_pend when it sends the next req. * We don't complete the IOCTL until all three DL_PARs * have been attempted. * * We don't need any lock to update ill_nd_lla* fields, * since the ill is not yet up, We grab the lock just * for uniformity with other code that accesses ill_nd_lla. */ physaddr_req = ill->ill_phys_addr_pend; ill_dlpi_done(ill, DL_PHYS_ADDR_REQ); if (physaddr_req == DL_IPV6_TOKEN || physaddr_req == DL_IPV6_LINK_LAYER_ADDR) { if (physaddr_req == DL_IPV6_TOKEN) { /* * bcopy to low-order bits of ill_token * * XXX Temporary hack - currently, * all known tokens are 64 bits, * so I'll cheat for the moment. */ dlp = (union DL_primitives *)mp->b_rptr; mutex_enter(&ill->ill_lock); bcopy((uchar_t *)(mp->b_rptr + dlp->physaddr_ack.dl_addr_offset), (void *)&ill->ill_token.s6_addr32[2], dlp->physaddr_ack.dl_addr_length); ill->ill_token_length = dlp->physaddr_ack.dl_addr_length; mutex_exit(&ill->ill_lock); } else { ASSERT(ill->ill_nd_lla_mp == NULL); mp_hw = copyb(mp); if (mp_hw == NULL) { err = ENOMEM; break; } dlp = (union DL_primitives *)mp_hw->b_rptr; mutex_enter(&ill->ill_lock); ill->ill_nd_lla_mp = mp_hw; ill->ill_nd_lla = (uchar_t *)mp_hw->b_rptr + dlp->physaddr_ack.dl_addr_offset; ill->ill_nd_lla_len = dlp->physaddr_ack.dl_addr_length; mutex_exit(&ill->ill_lock); } break; } ASSERT(physaddr_req == DL_CURR_PHYS_ADDR); ASSERT(ill->ill_phys_addr_mp == NULL); if (!ill->ill_ifname_pending) break; ill->ill_ifname_pending = 0; if (!ioctl_aborted) mp1 = ipsq_pending_mp_get(ipsq, &connp); if (mp1 != NULL) { ASSERT(connp == NULL); q = ill->ill_wq; } /* * If any error acks received during the plumbing sequence, * ill_ifname_pending_err will be set. Break out and send up * the error to the pending ioctl. */ if (ill->ill_ifname_pending_err != 0) { err = ill->ill_ifname_pending_err; ill->ill_ifname_pending_err = 0; break; } /* * Get the interface token. If the zeroth interface * address is zero then set the address to the link local * address */ mp_hw = copyb(mp); if (mp_hw == NULL) { err = ENOMEM; break; } dlp = (union DL_primitives *)mp_hw->b_rptr; ill->ill_phys_addr_mp = mp_hw; ill->ill_phys_addr = (uchar_t *)mp_hw->b_rptr + dlp->physaddr_ack.dl_addr_offset; if (dlp->physaddr_ack.dl_addr_length == 0 || ill->ill_phys_addr_length == 0 || ill->ill_phys_addr_length == IP_ADDR_LEN) { /* * Compatibility: atun driver returns a length of 0. * ipdptp has an ill_phys_addr_length of zero(from * DL_BIND_ACK) but a non-zero length here. * ipd has an ill_phys_addr_length of 4(from * DL_BIND_ACK) but a non-zero length here. */ ill->ill_phys_addr = NULL; } else if (dlp->physaddr_ack.dl_addr_length != ill->ill_phys_addr_length) { ip0dbg(("DL_PHYS_ADDR_ACK: " "Address length mismatch %d %d\n", dlp->physaddr_ack.dl_addr_length, ill->ill_phys_addr_length)); err = EINVAL; break; } mutex_enter(&ill->ill_lock); if (ill->ill_nd_lla_mp == NULL) { ill->ill_nd_lla_mp = copyb(mp_hw); if (ill->ill_nd_lla_mp == NULL) { err = ENOMEM; mutex_exit(&ill->ill_lock); break; } ill->ill_nd_lla = (uchar_t *)ill->ill_nd_lla_mp->b_rptr + dlp->physaddr_ack.dl_addr_offset; ill->ill_nd_lla_len = ill->ill_phys_addr_length; } mutex_exit(&ill->ill_lock); if (IN6_IS_ADDR_UNSPECIFIED(&ill->ill_token)) (void) ill_setdefaulttoken(ill); /* * If the ill zero interface has a zero address assign * it the proper link local address. */ ASSERT(ill->ill_ipif->ipif_id == 0); if (ipif != NULL && IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6lcl_addr)) (void) ipif_setlinklocal(ipif); break; } case DL_OK_ACK: ip2dbg(("DL_OK_ACK %s (0x%x)\n", dlpi_prim_str((int)dloa->dl_correct_primitive), dloa->dl_correct_primitive)); switch (dloa->dl_correct_primitive) { case DL_UNBIND_REQ: case DL_ATTACH_REQ: case DL_DETACH_REQ: ill_dlpi_done(ill, dloa->dl_correct_primitive); break; } break; default: break; } freemsg(mp); if (mp1) { struct iocblk *iocp; int mode; /* * Complete the waiting IOCTL. For SIOCLIFADDIF or * SIOCSLIFNAME do a copyout. */ iocp = (struct iocblk *)mp1->b_rptr; if (iocp->ioc_cmd == SIOCLIFADDIF || iocp->ioc_cmd == SIOCSLIFNAME) mode = COPYOUT; else mode = NO_COPYOUT; /* * The ioctl must complete now without EINPROGRESS * since ipsq_pending_mp_get has removed the ioctl mblk * from ipsq_pending_mp. Otherwise the ioctl will be * stuck for ever in the ipsq. */ ASSERT(err != EINPROGRESS); ip_ioctl_finish(q, mp1, err, mode, ipif, ipsq); } } /* * ip_rput_other is called by ip_rput to handle messages modifying the global * state in IP. Normally called as writer. Exception SIOCGTUNPARAM (shared) */ /* ARGSUSED */ void ip_rput_other(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg) { ill_t *ill; struct iocblk *iocp; mblk_t *mp1; conn_t *connp = NULL; ip1dbg(("ip_rput_other ")); ill = (ill_t *)q->q_ptr; /* * This routine is not a writer in the case of SIOCGTUNPARAM * in which case ipsq is NULL. */ if (ipsq != NULL) { ASSERT(IAM_WRITER_IPSQ(ipsq)); ASSERT(ipsq == ill->ill_phyint->phyint_ipsq); } switch (mp->b_datap->db_type) { case M_ERROR: case M_HANGUP: /* * The device has a problem. We force the ILL down. It can * be brought up again manually using SIOCSIFFLAGS (via * ifconfig or equivalent). */ ASSERT(ipsq != NULL); if (mp->b_rptr < mp->b_wptr) ill->ill_error = (int)(*mp->b_rptr & 0xFF); if (ill->ill_error == 0) ill->ill_error = ENXIO; if (!ill_down_start(q, mp)) return; ipif_all_down_tail(ipsq, q, mp, NULL); break; case M_IOCACK: iocp = (struct iocblk *)mp->b_rptr; ASSERT(iocp->ioc_cmd != DL_IOC_HDR_INFO); switch (iocp->ioc_cmd) { case SIOCSTUNPARAM: case OSIOCSTUNPARAM: ASSERT(ipsq != NULL); /* * Finish socket ioctl passed through to tun. * We should have an IOCTL waiting on this. */ mp1 = ipsq_pending_mp_get(ipsq, &connp); if (ill->ill_isv6) { struct iftun_req *ta; /* * if a source or destination is * being set, try and set the link * local address for the tunnel */ ta = (struct iftun_req *)mp->b_cont-> b_cont->b_rptr; if (ta->ifta_flags & (IFTUN_SRC | IFTUN_DST)) { ipif_set_tun_llink(ill, ta); } } if (mp1 != NULL) { /* * Now copy back the b_next/b_prev used by * mi code for the mi_copy* functions. * See ip_sioctl_tunparam() for the reason. * Also protect against missing b_cont. */ if (mp->b_cont != NULL) { mp->b_cont->b_next = mp1->b_cont->b_next; mp->b_cont->b_prev = mp1->b_cont->b_prev; } inet_freemsg(mp1); ASSERT(ipsq->ipsq_current_ipif != NULL); ASSERT(connp != NULL); ip_ioctl_finish(CONNP_TO_WQ(connp), mp, iocp->ioc_error, NO_COPYOUT, ipsq->ipsq_current_ipif, ipsq); } else { ASSERT(connp == NULL); putnext(q, mp); } break; case SIOCGTUNPARAM: case OSIOCGTUNPARAM: /* * This is really M_IOCDATA from the tunnel driver. * convert back and complete the ioctl. * We should have an IOCTL waiting on this. */ mp1 = ill_pending_mp_get(ill, &connp, iocp->ioc_id); if (mp1) { /* * Now copy back the b_next/b_prev used by * mi code for the mi_copy* functions. * See ip_sioctl_tunparam() for the reason. * Also protect against missing b_cont. */ if (mp->b_cont != NULL) { mp->b_cont->b_next = mp1->b_cont->b_next; mp->b_cont->b_prev = mp1->b_cont->b_prev; } inet_freemsg(mp1); if (iocp->ioc_error == 0) mp->b_datap->db_type = M_IOCDATA; ASSERT(connp != NULL); ip_ioctl_finish(CONNP_TO_WQ(connp), mp, iocp->ioc_error, COPYOUT, NULL, NULL); } else { ASSERT(connp == NULL); putnext(q, mp); } break; default: break; } break; case M_IOCNAK: iocp = (struct iocblk *)mp->b_rptr; switch (iocp->ioc_cmd) { int mode; ipif_t *ipif; case DL_IOC_HDR_INFO: /* * If this was the first attempt turn of the * fastpath probing. */ mutex_enter(&ill->ill_lock); if (ill->ill_dlpi_fastpath_state == IDS_INPROGRESS) { ill->ill_dlpi_fastpath_state = IDS_FAILED; mutex_exit(&ill->ill_lock); ill_fastpath_nack(ill); ip1dbg(("ip_rput: DLPI fastpath off on " "interface %s\n", ill->ill_name)); } else { mutex_exit(&ill->ill_lock); } freemsg(mp); break; case SIOCSTUNPARAM: case OSIOCSTUNPARAM: ASSERT(ipsq != NULL); /* * Finish socket ioctl passed through to tun * We should have an IOCTL waiting on this. */ /* FALLTHRU */ case SIOCGTUNPARAM: case OSIOCGTUNPARAM: /* * This is really M_IOCDATA from the tunnel driver. * convert back and complete the ioctl. * We should have an IOCTL waiting on this. */ if (iocp->ioc_cmd == SIOCGTUNPARAM || iocp->ioc_cmd == OSIOCGTUNPARAM) { mp1 = ill_pending_mp_get(ill, &connp, iocp->ioc_id); mode = COPYOUT; ipsq = NULL; ipif = NULL; } else { mp1 = ipsq_pending_mp_get(ipsq, &connp); mode = NO_COPYOUT; ASSERT(ipsq->ipsq_current_ipif != NULL); ipif = ipsq->ipsq_current_ipif; } if (mp1 != NULL) { /* * Now copy back the b_next/b_prev used by * mi code for the mi_copy* functions. * See ip_sioctl_tunparam() for the reason. * Also protect against missing b_cont. */ if (mp->b_cont != NULL) { mp->b_cont->b_next = mp1->b_cont->b_next; mp->b_cont->b_prev = mp1->b_cont->b_prev; } inet_freemsg(mp1); if (iocp->ioc_error == 0) iocp->ioc_error = EINVAL; ASSERT(connp != NULL); ip_ioctl_finish(CONNP_TO_WQ(connp), mp, iocp->ioc_error, mode, ipif, ipsq); } else { ASSERT(connp == NULL); putnext(q, mp); } break; default: break; } default: break; } } /* * NOTE : This function does not ire_refrele the ire argument passed in. * * IPQoS notes * IP policy is invoked twice for a forwarded packet, once on the read side * and again on the write side if both, IPP_FWD_IN and IPP_FWD_OUT are * enabled. An additional parameter, in_ill, has been added for this purpose. * Note that in_ill could be NULL when called from ip_rput_forward_multicast * because ip_mroute drops this information. * */ void ip_rput_forward(ire_t *ire, ipha_t *ipha, mblk_t *mp, ill_t *in_ill) { uint32_t pkt_len; queue_t *q; uint32_t sum; #define rptr ((uchar_t *)ipha) uint32_t max_frag; uint32_t ill_index; ill_t *out_ill; /* Get the ill_index of the incoming ILL */ ill_index = (in_ill != NULL) ? in_ill->ill_phyint->phyint_ifindex : 0; /* Initiate Read side IPPF processing */ if (IPP_ENABLED(IPP_FWD_IN)) { ip_process(IPP_FWD_IN, &mp, ill_index); if (mp == NULL) { ip2dbg(("ip_rput_forward: pkt dropped/deferred "\ "during IPPF processing\n")); return; } } pkt_len = ntohs(ipha->ipha_length); /* Adjust the checksum to reflect the ttl decrement. */ sum = (int)ipha->ipha_hdr_checksum + IP_HDR_CSUM_TTL_ADJUST; ipha->ipha_hdr_checksum = (uint16_t)(sum + (sum >> 16)); if (ipha->ipha_ttl-- <= 1) { if (ip_csum_hdr(ipha)) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto drop_pkt; } /* * Note: ire_stq this will be NULL for multicast * datagrams using the long path through arp (the IRE * is not an IRE_CACHE). This should not cause * problems since we don't generate ICMP errors for * multicast packets. */ q = ire->ire_stq; if (q != NULL) { /* Sent by forwarding path, and router is global zone */ icmp_time_exceeded(q, mp, ICMP_TTL_EXCEEDED, GLOBAL_ZONEID); } else freemsg(mp); return; } /* * Don't forward if the interface is down */ if (ire->ire_ipif->ipif_ill->ill_ipif_up_count == 0) { BUMP_MIB(&ip_mib, ipInDiscards); ip2dbg(("ip_rput_forward:interface is down\n")); goto drop_pkt; } /* Get the ill_index of the outgoing ILL */ ill_index = ire->ire_ipif->ipif_ill->ill_phyint->phyint_ifindex; out_ill = ire->ire_ipif->ipif_ill; DTRACE_PROBE4(ip4__forwarding__start, ill_t *, in_ill, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_forwarding_event, ipv4firewall_forwarding, in_ill, out_ill, ipha, mp, mp); DTRACE_PROBE1(ip4__forwarding__end, mblk_t *, mp); if (mp == NULL) return; pkt_len = ntohs(ipha->ipha_length); if (is_system_labeled()) { mblk_t *mp1; if ((mp1 = tsol_ip_forward(ire, mp)) == NULL) { BUMP_MIB(&ip_mib, ipForwProhibits); goto drop_pkt; } /* Size may have changed */ mp = mp1; ipha = (ipha_t *)mp->b_rptr; pkt_len = ntohs(ipha->ipha_length); } /* Check if there are options to update */ if (!IS_SIMPLE_IPH(ipha)) { if (ip_csum_hdr(ipha)) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto drop_pkt; } if (ip_rput_forward_options(mp, ipha, ire)) { return; } ipha->ipha_hdr_checksum = 0; ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); } max_frag = ire->ire_max_frag; if (pkt_len > max_frag) { /* * It needs fragging on its way out. We haven't * verified the header checksum yet. Since we * are going to put a surely good checksum in the * outgoing header, we have to make sure that it * was good coming in. */ if (ip_csum_hdr(ipha)) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto drop_pkt; } /* Initiate Write side IPPF processing */ if (IPP_ENABLED(IPP_FWD_OUT)) { ip_process(IPP_FWD_OUT, &mp, ill_index); if (mp == NULL) { ip2dbg(("ip_rput_forward: pkt dropped/deferred"\ " during IPPF processing\n")); return; } } ip_wput_frag(ire, mp, IB_PKT, max_frag, 0, GLOBAL_ZONEID); ip2dbg(("ip_rput_forward:sent to ip_wput_frag\n")); return; } DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, out_ill, ipha, mp, mp); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp == NULL) return; mp->b_prev = (mblk_t *)IPP_FWD_OUT; ip1dbg(("ip_rput_forward: Calling ip_xmit_v4\n")); (void) ip_xmit_v4(mp, ire, NULL, B_FALSE); /* ip_xmit_v4 always consumes the packet */ return; drop_pkt:; ip1dbg(("ip_rput_forward: drop pkt\n")); freemsg(mp); #undef rptr } void ip_rput_forward_multicast(ipaddr_t dst, mblk_t *mp, ipif_t *ipif) { ire_t *ire; ASSERT(!ipif->ipif_isv6); /* * Find an IRE which matches the destination and the outgoing * queue in the cache table. All we need is an IRE_CACHE which * is pointing at ipif->ipif_ill. If it is part of some ill group, * then it is enough to have some IRE_CACHE in the group. */ if (ipif->ipif_flags & IPIF_POINTOPOINT) dst = ipif->ipif_pp_dst_addr; ire = ire_ctable_lookup(dst, 0, 0, ipif, ALL_ZONES, MBLK_GETLABEL(mp), MATCH_IRE_ILL_GROUP | MATCH_IRE_SECATTR); if (ire == NULL) { /* * Mark this packet to make it be delivered to * ip_rput_forward after the new ire has been * created. */ mp->b_prev = NULL; mp->b_next = mp; ip_newroute_ipif(ipif->ipif_ill->ill_wq, mp, ipif, dst, NULL, 0, GLOBAL_ZONEID); } else { ip_rput_forward(ire, (ipha_t *)mp->b_rptr, mp, NULL); IRE_REFRELE(ire); } } /* Update any source route, record route or timestamp options */ static int ip_rput_forward_options(mblk_t *mp, ipha_t *ipha, ire_t *ire) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; uint32_t ts; ire_t *dst_ire = NULL; ire_t *tmp_ire = NULL; timestruc_t now; ip2dbg(("ip_rput_forward_options\n")); dst = ipha->ipha_dst; for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0); opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ip2dbg(("ip_rput_forward_options: opt %d, len %d\n", optval, opts.ipoptp_len)); switch (optval) { uint32_t off; case IPOPT_SSRR: case IPOPT_LSRR: /* Check if adminstratively disabled */ if (!ip_forward_src_routed) { BUMP_MIB(&ip_mib, ipForwProhibits); if (ire->ire_stq != NULL) { /* * Sent by forwarding path, and router * is global zone */ icmp_unreachable(ire->ire_stq, mp, ICMP_SOURCE_ROUTE_FAILED, GLOBAL_ZONEID); } else { ip0dbg(("ip_rput_forward_options: " "unable to send unreach\n")); freemsg(mp); } return (-1); } dst_ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (dst_ire == NULL) { /* * Must be partial since ip_rput_options * checked for strict. */ break; } off = opt[IPOPT_OFFSET]; off--; redo_srr: if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* End of source route */ ip1dbg(( "ip_rput_forward_options: end of SR\n")); ire_refrele(dst_ire); break; } bcopy((char *)opt + off, &dst, IP_ADDR_LEN); bcopy(&ire->ire_src_addr, (char *)opt + off, IP_ADDR_LEN); ip1dbg(("ip_rput_forward_options: next hop 0x%x\n", ntohl(dst))); /* * Check if our address is present more than * once as consecutive hops in source route. */ tmp_ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (tmp_ire != NULL) { ire_refrele(tmp_ire); off += IP_ADDR_LEN; opt[IPOPT_OFFSET] += IP_ADDR_LEN; goto redo_srr; } ipha->ipha_dst = dst; opt[IPOPT_OFFSET] += IP_ADDR_LEN; ire_refrele(dst_ire); break; case IPOPT_RR: off = opt[IPOPT_OFFSET]; off--; if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* No more room - ignore */ ip1dbg(( "ip_rput_forward_options: end of RR\n")); break; } bcopy(&ire->ire_src_addr, (char *)opt + off, IP_ADDR_LEN); opt[IPOPT_OFFSET] += IP_ADDR_LEN; break; case IPOPT_TS: /* Insert timestamp if there is room */ switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_TSONLY: off = IPOPT_TS_TIMELEN; break; case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: /* Verify that the address matched */ off = opt[IPOPT_OFFSET] - 1; bcopy((char *)opt + off, &dst, IP_ADDR_LEN); dst_ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (dst_ire == NULL) { /* Not for us */ break; } ire_refrele(dst_ire); /* FALLTHRU */ case IPOPT_TS_TSANDADDR: off = IP_ADDR_LEN + IPOPT_TS_TIMELEN; break; default: /* * ip_*put_options should have already * dropped this packet. */ cmn_err(CE_PANIC, "ip_rput_forward_options: " "unknown IT - bug in ip_rput_options?\n"); return (0); /* Keep "lint" happy */ } if (opt[IPOPT_OFFSET] - 1 + off > optlen) { /* Increase overflow counter */ off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1; opt[IPOPT_POS_OV_FLG] = (uint8_t)((opt[IPOPT_POS_OV_FLG] & 0x0F) | (off << 4)); break; } off = opt[IPOPT_OFFSET] - 1; switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: case IPOPT_TS_TSANDADDR: bcopy(&ire->ire_src_addr, (char *)opt + off, IP_ADDR_LEN); opt[IPOPT_OFFSET] += IP_ADDR_LEN; /* FALLTHRU */ case IPOPT_TS_TSONLY: off = opt[IPOPT_OFFSET] - 1; /* Compute # of milliseconds since midnight */ gethrestime(&now); ts = (now.tv_sec % (24 * 60 * 60)) * 1000 + now.tv_nsec / (NANOSEC / MILLISEC); bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN); opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN; break; } break; } } return (0); } /* * This is called after processing at least one of AH/ESP headers. * * NOTE: the ill corresponding to ipsec_in_ill_index may not be * the actual, physical interface on which the packet was received, * but, when ip_strict_dst_multihoming is set to 1, could be the * interface which had the ipha_dst configured when the packet went * through ip_rput. The ill_index corresponding to the recv_ill * is saved in ipsec_in_rill_index */ void ip_fanout_proto_again(mblk_t *ipsec_mp, ill_t *ill, ill_t *recv_ill, ire_t *ire) { mblk_t *mp; ipaddr_t dst; in6_addr_t *v6dstp; ipha_t *ipha; ip6_t *ip6h; ipsec_in_t *ii; boolean_t ill_need_rele = B_FALSE; boolean_t rill_need_rele = B_FALSE; boolean_t ire_need_rele = B_FALSE; ii = (ipsec_in_t *)ipsec_mp->b_rptr; ASSERT(ii->ipsec_in_ill_index != 0); mp = ipsec_mp->b_cont; ASSERT(mp != NULL); if (ill == NULL) { ASSERT(recv_ill == NULL); /* * We need to get the original queue on which ip_rput_local * or ip_rput_data_v6 was called. */ ill = ill_lookup_on_ifindex(ii->ipsec_in_ill_index, !ii->ipsec_in_v4, NULL, NULL, NULL, NULL); ill_need_rele = B_TRUE; if (ii->ipsec_in_ill_index != ii->ipsec_in_rill_index) { recv_ill = ill_lookup_on_ifindex( ii->ipsec_in_rill_index, !ii->ipsec_in_v4, NULL, NULL, NULL, NULL); rill_need_rele = B_TRUE; } else { recv_ill = ill; } if ((ill == NULL) || (recv_ill == NULL)) { ip0dbg(("ip_fanout_proto_again: interface " "disappeared\n")); if (ill != NULL) ill_refrele(ill); if (recv_ill != NULL) ill_refrele(recv_ill); freemsg(ipsec_mp); return; } } ASSERT(ill != NULL && recv_ill != NULL); if (mp->b_datap->db_type == M_CTL) { /* * AH/ESP is returning the ICMP message after * removing their headers. Fanout again till * it gets to the right protocol. */ if (ii->ipsec_in_v4) { icmph_t *icmph; int iph_hdr_length; int hdr_length; ipha = (ipha_t *)mp->b_rptr; iph_hdr_length = IPH_HDR_LENGTH(ipha); icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; hdr_length = IPH_HDR_LENGTH(ipha); /* * icmp_inbound_error_fanout may need to do pullupmsg. * Reset the type to M_DATA. */ mp->b_datap->db_type = M_DATA; icmp_inbound_error_fanout(ill->ill_rq, ill, ipsec_mp, icmph, ipha, iph_hdr_length, hdr_length, B_TRUE, B_FALSE, ill, ii->ipsec_in_zoneid); } else { icmp6_t *icmp6; int hdr_length; ip6h = (ip6_t *)mp->b_rptr; /* Don't call hdr_length_v6() unless you have to. */ if (ip6h->ip6_nxt != IPPROTO_ICMPV6) hdr_length = ip_hdr_length_v6(mp, ip6h); else hdr_length = IPV6_HDR_LEN; icmp6 = (icmp6_t *)(&mp->b_rptr[hdr_length]); /* * icmp_inbound_error_fanout_v6 may need to do * pullupmsg. Reset the type to M_DATA. */ mp->b_datap->db_type = M_DATA; icmp_inbound_error_fanout_v6(ill->ill_rq, ipsec_mp, ip6h, icmp6, ill, B_TRUE, ii->ipsec_in_zoneid); } if (ill_need_rele) ill_refrele(ill); if (rill_need_rele) ill_refrele(recv_ill); return; } if (ii->ipsec_in_v4) { ipha = (ipha_t *)mp->b_rptr; dst = ipha->ipha_dst; if (CLASSD(dst)) { /* * Multicast has to be delivered to all streams. */ dst = INADDR_BROADCAST; } if (ire == NULL) { ire = ire_cache_lookup(dst, ii->ipsec_in_zoneid, MBLK_GETLABEL(mp)); if (ire == NULL) { if (ill_need_rele) ill_refrele(ill); if (rill_need_rele) ill_refrele(recv_ill); ip1dbg(("ip_fanout_proto_again: " "IRE not found")); freemsg(ipsec_mp); return; } ire_need_rele = B_TRUE; } switch (ipha->ipha_protocol) { case IPPROTO_UDP: ip_udp_input(ill->ill_rq, ipsec_mp, ipha, ire, recv_ill); if (ire_need_rele) ire_refrele(ire); break; case IPPROTO_TCP: if (!ire_need_rele) IRE_REFHOLD(ire); mp = ip_tcp_input(mp, ipha, ill, B_TRUE, ire, ipsec_mp, 0, ill->ill_rq, NULL); IRE_REFRELE(ire); if (mp != NULL) squeue_enter_chain(GET_SQUEUE(mp), mp, mp, 1, SQTAG_IP_PROTO_AGAIN); break; case IPPROTO_SCTP: if (!ire_need_rele) IRE_REFHOLD(ire); ip_sctp_input(mp, ipha, ill, B_TRUE, ire, ipsec_mp, 0, ill->ill_rq, dst); break; default: ip_proto_input(ill->ill_rq, ipsec_mp, ipha, ire, recv_ill); if (ire_need_rele) ire_refrele(ire); break; } } else { uint32_t rput_flags = 0; ip6h = (ip6_t *)mp->b_rptr; v6dstp = &ip6h->ip6_dst; /* * XXX Assumes ip_rput_v6 sets ll_multicast only for multicast * address. * * Currently, we don't store that state in the IPSEC_IN * message, and we may need to. */ rput_flags |= (IN6_IS_ADDR_MULTICAST(v6dstp) ? IP6_IN_LLMCAST : 0); ip_rput_data_v6(ill->ill_rq, ill, ipsec_mp, ip6h, rput_flags, NULL, NULL); } if (ill_need_rele) ill_refrele(ill); if (rill_need_rele) ill_refrele(recv_ill); } /* * Call ill_frag_timeout to do garbage collection. ill_frag_timeout * returns 'true' if there are still fragments left on the queue, in * which case we restart the timer. */ void ill_frag_timer(void *arg) { ill_t *ill = (ill_t *)arg; boolean_t frag_pending; mutex_enter(&ill->ill_lock); ASSERT(!ill->ill_fragtimer_executing); if (ill->ill_state_flags & ILL_CONDEMNED) { ill->ill_frag_timer_id = 0; mutex_exit(&ill->ill_lock); return; } ill->ill_fragtimer_executing = 1; mutex_exit(&ill->ill_lock); frag_pending = ill_frag_timeout(ill, ip_g_frag_timeout); /* * Restart the timer, if we have fragments pending or if someone * wanted us to be scheduled again. */ mutex_enter(&ill->ill_lock); ill->ill_fragtimer_executing = 0; ill->ill_frag_timer_id = 0; if (frag_pending || ill->ill_fragtimer_needrestart) ill_frag_timer_start(ill); mutex_exit(&ill->ill_lock); } void ill_frag_timer_start(ill_t *ill) { ASSERT(MUTEX_HELD(&ill->ill_lock)); /* If the ill is closing or opening don't proceed */ if (ill->ill_state_flags & ILL_CONDEMNED) return; if (ill->ill_fragtimer_executing) { /* * ill_frag_timer is currently executing. Just record the * the fact that we want the timer to be restarted. * ill_frag_timer will post a timeout before it returns, * ensuring it will be called again. */ ill->ill_fragtimer_needrestart = 1; return; } if (ill->ill_frag_timer_id == 0) { /* * The timer is neither running nor is the timeout handler * executing. Post a timeout so that ill_frag_timer will be * called */ ill->ill_frag_timer_id = timeout(ill_frag_timer, ill, MSEC_TO_TICK(ip_g_frag_timo_ms >> 1)); ill->ill_fragtimer_needrestart = 0; } } /* * This routine is needed for loopback when forwarding multicasts. * * IPQoS Notes: * IPPF processing is done in fanout routines. * Policy processing is done only if IPP_lOCAL_IN is enabled. Further, * processing for IPSec packets is done when it comes back in clear. * NOTE : The callers of this function need to do the ire_refrele for the * ire that is being passed in. */ void ip_proto_input(queue_t *q, mblk_t *mp, ipha_t *ipha, ire_t *ire, ill_t *recv_ill) { ill_t *ill = (ill_t *)q->q_ptr; uint32_t sum; uint32_t u1; uint32_t u2; int hdr_length; boolean_t mctl_present; mblk_t *first_mp = mp; mblk_t *hada_mp = NULL; ipha_t *inner_ipha; TRACE_1(TR_FAC_IP, TR_IP_RPUT_LOCL_START, "ip_rput_locl_start: q %p", q); ASSERT(ire->ire_ipversion == IPV4_VERSION); #define rptr ((uchar_t *)ipha) #define iphs ((uint16_t *)ipha) /* * no UDP or TCP packet should come here anymore. */ ASSERT((ipha->ipha_protocol != IPPROTO_TCP) && (ipha->ipha_protocol != IPPROTO_UDP)); EXTRACT_PKT_MP(mp, first_mp, mctl_present); if (mctl_present && ((da_ipsec_t *)first_mp->b_rptr)->da_type == IPHADA_M_CTL) { ASSERT(MBLKL(first_mp) >= sizeof (da_ipsec_t)); /* * It's an IPsec accelerated packet. * Keep a pointer to the data attributes around until * we allocate the ipsec_info_t. */ IPSECHW_DEBUG(IPSECHW_PKT, ("ip_rput_local: inbound HW accelerated IPsec pkt\n")); hada_mp = first_mp; hada_mp->b_cont = NULL; /* * Since it is accelerated, it comes directly from * the ill and the data attributes is followed by * the packet data. */ ASSERT(mp->b_datap->db_type != M_CTL); first_mp = mp; mctl_present = B_FALSE; } /* * IF M_CTL is not present, then ipsec_in_is_secure * should return B_TRUE. There is a case where loopback * packets has an M_CTL in the front with all the * IPSEC options set to IPSEC_PREF_NEVER - which means * ipsec_in_is_secure will return B_FALSE. As loopback * packets never comes here, it is safe to ASSERT the * following. */ ASSERT(!mctl_present || ipsec_in_is_secure(first_mp)); /* u1 is # words of IP options */ u1 = ipha->ipha_version_and_hdr_length - (uchar_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS); if (u1) { if (!ip_options_cksum(q, mp, ipha, ire)) { if (hada_mp != NULL) freemsg(hada_mp); return; } } else { /* Check the IP header checksum. */ #define uph ((uint16_t *)ipha) sum = uph[0] + uph[1] + uph[2] + uph[3] + uph[4] + uph[5] + uph[6] + uph[7] + uph[8] + uph[9]; #undef uph /* finish doing IP checksum */ sum = (sum & 0xFFFF) + (sum >> 16); sum = ~(sum + (sum >> 16)) & 0xFFFF; /* * Don't verify header checksum if this packet is coming * back from AH/ESP as we already did it. */ if (!mctl_present && (sum && sum != 0xFFFF)) { BUMP_MIB(&ip_mib, ipInCksumErrs); goto drop_pkt; } } /* * Count for SNMP of inbound packets for ire. As ip_proto_input * might be called more than once for secure packets, count only * the first time. */ if (!mctl_present) { UPDATE_IB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; } /* Check for fragmentation offset. */ u2 = ntohs(ipha->ipha_fragment_offset_and_flags); u1 = u2 & (IPH_MF | IPH_OFFSET); if (u1) { /* * We re-assemble fragments before we do the AH/ESP * processing. Thus, M_CTL should not be present * while we are re-assembling. */ ASSERT(!mctl_present); ASSERT(first_mp == mp); if (!ip_rput_fragment(q, &mp, ipha, NULL, NULL)) { return; } /* * Make sure that first_mp points back to mp as * the mp we came in with could have changed in * ip_rput_fragment(). */ ipha = (ipha_t *)mp->b_rptr; first_mp = mp; } /* * Clear hardware checksumming flag as it is currently only * used by TCP and UDP. */ DB_CKSUMFLAGS(mp) = 0; /* Now we have a complete datagram, destined for this machine. */ u1 = IPH_HDR_LENGTH(ipha); switch (ipha->ipha_protocol) { case IPPROTO_ICMP: { ire_t *ire_zone; ilm_t *ilm; mblk_t *mp1; zoneid_t last_zoneid; if (CLASSD(ipha->ipha_dst) && !(recv_ill->ill_phyint->phyint_flags & PHYI_LOOPBACK)) { ASSERT(ire->ire_type == IRE_BROADCAST); /* * In the multicast case, applications may have joined * the group from different zones, so we need to deliver * the packet to each of them. Loop through the * multicast memberships structures (ilm) on the receive * ill and send a copy of the packet up each matching * one. However, we don't do this for multicasts sent on * the loopback interface (PHYI_LOOPBACK flag set) as * they must stay in the sender's zone. * * ilm_add_v6() ensures that ilms in the same zone are * contiguous in the ill_ilm list. We use this property * to avoid sending duplicates needed when two * applications in the same zone join the same group on * different logical interfaces: we ignore the ilm if * its zoneid is the same as the last matching one. * In addition, the sending of the packet for * ire_zoneid is delayed until all of the other ilms * have been exhausted. */ last_zoneid = -1; ILM_WALKER_HOLD(recv_ill); for (ilm = recv_ill->ill_ilm; ilm != NULL; ilm = ilm->ilm_next) { if ((ilm->ilm_flags & ILM_DELETED) || ipha->ipha_dst != ilm->ilm_addr || ilm->ilm_zoneid == last_zoneid || ilm->ilm_zoneid == ire->ire_zoneid || ilm->ilm_zoneid == ALL_ZONES || !(ilm->ilm_ipif->ipif_flags & IPIF_UP)) continue; mp1 = ip_copymsg(first_mp); if (mp1 == NULL) continue; icmp_inbound(q, mp1, B_TRUE, ill, 0, sum, mctl_present, B_TRUE, recv_ill, ilm->ilm_zoneid); last_zoneid = ilm->ilm_zoneid; } ILM_WALKER_RELE(recv_ill); } else if (ire->ire_type == IRE_BROADCAST) { /* * In the broadcast case, there may be many zones * which need a copy of the packet delivered to them. * There is one IRE_BROADCAST per broadcast address * and per zone; we walk those using a helper function. * In addition, the sending of the packet for ire is * delayed until all of the other ires have been * processed. */ IRB_REFHOLD(ire->ire_bucket); ire_zone = NULL; while ((ire_zone = ire_get_next_bcast_ire(ire_zone, ire)) != NULL) { mp1 = ip_copymsg(first_mp); if (mp1 == NULL) continue; UPDATE_IB_PKT_COUNT(ire_zone); ire_zone->ire_last_used_time = lbolt; icmp_inbound(q, mp1, B_TRUE, ill, 0, sum, mctl_present, B_TRUE, recv_ill, ire_zone->ire_zoneid); } IRB_REFRELE(ire->ire_bucket); } icmp_inbound(q, first_mp, (ire->ire_type == IRE_BROADCAST), ill, 0, sum, mctl_present, B_TRUE, recv_ill, ire->ire_zoneid); TRACE_2(TR_FAC_IP, TR_IP_RPUT_LOCL_END, "ip_rput_locl_end: q %p (%S)", q, "icmp"); return; } case IPPROTO_IGMP: /* * If we are not willing to accept IGMP packets in clear, * then check with global policy. */ if (igmp_accept_clear_messages == 0) { first_mp = ipsec_check_global_policy(first_mp, NULL, ipha, NULL, mctl_present); if (first_mp == NULL) return; } if (is_system_labeled() && !tsol_can_accept_raw(mp, B_TRUE)) { freemsg(first_mp); ip1dbg(("ip_proto_input: zone all cannot accept raw")); BUMP_MIB(&ip_mib, ipInDiscards); return; } if ((mp = igmp_input(q, mp, ill)) == NULL) { /* Bad packet - discarded by igmp_input */ TRACE_2(TR_FAC_IP, TR_IP_RPUT_LOCL_END, "ip_rput_locl_end: q %p (%S)", q, "igmp"); if (mctl_present) freeb(first_mp); return; } /* * igmp_input() may have returned the pulled up message. * So first_mp and ipha need to be reinitialized. */ ipha = (ipha_t *)mp->b_rptr; if (mctl_present) first_mp->b_cont = mp; else first_mp = mp; if (ipcl_proto_search(ipha->ipha_protocol) == NULL) { /* No user-level listener for IGMP packets */ goto drop_pkt; } /* deliver to local raw users */ break; case IPPROTO_PIM: /* * If we are not willing to accept PIM packets in clear, * then check with global policy. */ if (pim_accept_clear_messages == 0) { first_mp = ipsec_check_global_policy(first_mp, NULL, ipha, NULL, mctl_present); if (first_mp == NULL) return; } if (is_system_labeled() && !tsol_can_accept_raw(mp, B_TRUE)) { freemsg(first_mp); ip1dbg(("ip_proto_input: zone all cannot accept PIM")); BUMP_MIB(&ip_mib, ipInDiscards); return; } if (pim_input(q, mp) != 0) { /* Bad packet - discarded by pim_input */ TRACE_2(TR_FAC_IP, TR_IP_RPUT_LOCL_END, "ip_rput_locl_end: q %p (%S)", q, "pim"); if (mctl_present) freeb(first_mp); return; } /* * pim_input() may have pulled up the message so ipha needs to * be reinitialized. */ ipha = (ipha_t *)mp->b_rptr; if (ipcl_proto_search(ipha->ipha_protocol) == NULL) { /* No user-level listener for PIM packets */ goto drop_pkt; } /* deliver to local raw users */ break; case IPPROTO_ENCAP: /* * Handle self-encapsulated packets (IP-in-IP where * the inner addresses == the outer addresses). */ hdr_length = IPH_HDR_LENGTH(ipha); if ((uchar_t *)ipha + hdr_length + sizeof (ipha_t) > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + hdr_length + sizeof (ipha_t) - mp->b_rptr)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } ipha = (ipha_t *)mp->b_rptr; } inner_ipha = (ipha_t *)((uchar_t *)ipha + hdr_length); /* * Check the sanity of the inner IP header. */ if ((IPH_HDR_VERSION(inner_ipha) != IPV4_VERSION)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } if (IPH_HDR_LENGTH(inner_ipha) < sizeof (ipha_t)) { BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } if (inner_ipha->ipha_src == ipha->ipha_src && inner_ipha->ipha_dst == ipha->ipha_dst) { ipsec_in_t *ii; /* * Self-encapsulated tunnel packet. Remove * the outer IP header and fanout again. * We also need to make sure that the inner * header is pulled up until options. */ mp->b_rptr = (uchar_t *)inner_ipha; ipha = inner_ipha; hdr_length = IPH_HDR_LENGTH(ipha); if ((uchar_t *)ipha + hdr_length > mp->b_wptr) { if (!pullupmsg(mp, (uchar_t *)ipha + + hdr_length - mp->b_rptr)) { freemsg(first_mp); return; } ipha = (ipha_t *)mp->b_rptr; } if (!mctl_present) { ASSERT(first_mp == mp); /* * This means that somebody is sending * Self-encapsualted packets without AH/ESP. * If AH/ESP was present, we would have already * allocated the first_mp. */ if ((first_mp = ipsec_in_alloc(B_TRUE)) == NULL) { ip1dbg(("ip_proto_input: IPSEC_IN " "allocation failure.\n")); BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); return; } first_mp->b_cont = mp; } /* * We generally store the ill_index if we need to * do IPSEC processing as we lose the ill queue when * we come back. But in this case, we never should * have to store the ill_index here as it should have * been stored previously when we processed the * AH/ESP header in this routine or for non-ipsec * cases, we still have the queue. But for some bad * packets from the wire, we can get to IPSEC after * this and we better store the index for that case. */ ill = (ill_t *)q->q_ptr; ii = (ipsec_in_t *)first_mp->b_rptr; ii->ipsec_in_ill_index = ill->ill_phyint->phyint_ifindex; ii->ipsec_in_rill_index = recv_ill->ill_phyint->phyint_ifindex; if (ii->ipsec_in_decaps) { /* * This packet is self-encapsulated multiple * times. We don't want to recurse infinitely. * To keep it simple, drop the packet. */ BUMP_MIB(&ip_mib, ipInDiscards); freemsg(first_mp); return; } ii->ipsec_in_decaps = B_TRUE; ip_fanout_proto_again(first_mp, recv_ill, recv_ill, ire); return; } break; case IPPROTO_AH: case IPPROTO_ESP: { /* * Fast path for AH/ESP. If this is the first time * we are sending a datagram to AH/ESP, allocate * a IPSEC_IN message and prepend it. Otherwise, * just fanout. */ int ipsec_rc; ipsec_in_t *ii; IP_STAT(ipsec_proto_ahesp); if (!mctl_present) { ASSERT(first_mp == mp); if ((first_mp = ipsec_in_alloc(B_TRUE)) == NULL) { ip1dbg(("ip_proto_input: IPSEC_IN " "allocation failure.\n")); freemsg(hada_mp); /* okay ifnull */ BUMP_MIB(&ip_mib, ipInDiscards); freemsg(mp); return; } /* * Store the ill_index so that when we come back * from IPSEC we ride on the same queue. */ ill = (ill_t *)q->q_ptr; ii = (ipsec_in_t *)first_mp->b_rptr; ii->ipsec_in_ill_index = ill->ill_phyint->phyint_ifindex; ii->ipsec_in_rill_index = recv_ill->ill_phyint->phyint_ifindex; first_mp->b_cont = mp; /* * Cache hardware acceleration info. */ if (hada_mp != NULL) { IPSECHW_DEBUG(IPSECHW_PKT, ("ip_rput_local: caching data attr.\n")); ii->ipsec_in_accelerated = B_TRUE; ii->ipsec_in_da = hada_mp; hada_mp = NULL; } } else { ii = (ipsec_in_t *)first_mp->b_rptr; } if (!ipsec_loaded()) { ip_proto_not_sup(q, first_mp, IP_FF_SEND_ICMP, ire->ire_zoneid); return; } /* select inbound SA and have IPsec process the pkt */ if (ipha->ipha_protocol == IPPROTO_ESP) { esph_t *esph = ipsec_inbound_esp_sa(first_mp); if (esph == NULL) return; ASSERT(ii->ipsec_in_esp_sa != NULL); ASSERT(ii->ipsec_in_esp_sa->ipsa_input_func != NULL); ipsec_rc = ii->ipsec_in_esp_sa->ipsa_input_func( first_mp, esph); } else { ah_t *ah = ipsec_inbound_ah_sa(first_mp); if (ah == NULL) return; ASSERT(ii->ipsec_in_ah_sa != NULL); ASSERT(ii->ipsec_in_ah_sa->ipsa_input_func != NULL); ipsec_rc = ii->ipsec_in_ah_sa->ipsa_input_func( first_mp, ah); } switch (ipsec_rc) { case IPSEC_STATUS_SUCCESS: break; case IPSEC_STATUS_FAILED: BUMP_MIB(&ip_mib, ipInDiscards); /* FALLTHRU */ case IPSEC_STATUS_PENDING: return; } /* we're done with IPsec processing, send it up */ ip_fanout_proto_again(first_mp, ill, recv_ill, ire); return; } default: break; } if (is_system_labeled() && !tsol_can_accept_raw(mp, B_FALSE)) { ip1dbg(("ip_proto_input: zone %d cannot accept raw IP", ire->ire_zoneid)); goto drop_pkt; } /* * Handle protocols with which IP is less intimate. There * can be more than one stream bound to a particular * protocol. When this is the case, each one gets a copy * of any incoming packets. */ ip_fanout_proto(q, first_mp, ill, ipha, IP_FF_SEND_ICMP | IP_FF_CKSUM | IP_FF_RAWIP, mctl_present, B_TRUE, recv_ill, ire->ire_zoneid); TRACE_2(TR_FAC_IP, TR_IP_RPUT_LOCL_END, "ip_rput_locl_end: q %p (%S)", q, "ip_fanout_proto"); return; drop_pkt: freemsg(first_mp); if (hada_mp != NULL) freeb(hada_mp); TRACE_2(TR_FAC_IP, TR_IP_RPUT_LOCL_END, "ip_rput_locl_end: q %p (%S)", q, "droppkt"); #undef rptr #undef iphs } /* * Update any source route, record route or timestamp options. * Check that we are at end of strict source route. * The options have already been checked for sanity in ip_rput_options(). */ static boolean_t ip_rput_local_options(queue_t *q, mblk_t *mp, ipha_t *ipha, ire_t *ire) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; uint32_t ts; ire_t *dst_ire; timestruc_t now; zoneid_t zoneid; ill_t *ill; ASSERT(ire->ire_ipversion == IPV4_VERSION); ip2dbg(("ip_rput_local_options\n")); for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0); opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ip2dbg(("ip_rput_local_options: opt %d, len %d\n", optval, optlen)); switch (optval) { uint32_t off; case IPOPT_SSRR: case IPOPT_LSRR: off = opt[IPOPT_OFFSET]; off--; if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* End of source route */ ip1dbg(("ip_rput_local_options: end of SR\n")); break; } /* * This will only happen if two consecutive entries * in the source route contains our address or if * it is a packet with a loose source route which * reaches us before consuming the whole source route */ ip1dbg(("ip_rput_local_options: not end of SR\n")); if (optval == IPOPT_SSRR) { goto bad_src_route; } /* * Hack: instead of dropping the packet truncate the * source route to what has been used by filling the * rest with IPOPT_NOP. */ opt[IPOPT_OLEN] = (uint8_t)off; while (off < optlen) { opt[off++] = IPOPT_NOP; } break; case IPOPT_RR: off = opt[IPOPT_OFFSET]; off--; if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* No more room - ignore */ ip1dbg(( "ip_rput_local_options: end of RR\n")); break; } bcopy(&ire->ire_src_addr, (char *)opt + off, IP_ADDR_LEN); opt[IPOPT_OFFSET] += IP_ADDR_LEN; break; case IPOPT_TS: /* Insert timestamp if there is romm */ switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_TSONLY: off = IPOPT_TS_TIMELEN; break; case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: /* Verify that the address matched */ off = opt[IPOPT_OFFSET] - 1; bcopy((char *)opt + off, &dst, IP_ADDR_LEN); dst_ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (dst_ire == NULL) { /* Not for us */ break; } ire_refrele(dst_ire); /* FALLTHRU */ case IPOPT_TS_TSANDADDR: off = IP_ADDR_LEN + IPOPT_TS_TIMELEN; break; default: /* * ip_*put_options should have already * dropped this packet. */ cmn_err(CE_PANIC, "ip_rput_local_options: " "unknown IT - bug in ip_rput_options?\n"); return (B_TRUE); /* Keep "lint" happy */ } if (opt[IPOPT_OFFSET] - 1 + off > optlen) { /* Increase overflow counter */ off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1; opt[IPOPT_POS_OV_FLG] = (uint8_t)((opt[IPOPT_POS_OV_FLG] & 0x0F) | (off << 4)); break; } off = opt[IPOPT_OFFSET] - 1; switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: case IPOPT_TS_TSANDADDR: bcopy(&ire->ire_src_addr, (char *)opt + off, IP_ADDR_LEN); opt[IPOPT_OFFSET] += IP_ADDR_LEN; /* FALLTHRU */ case IPOPT_TS_TSONLY: off = opt[IPOPT_OFFSET] - 1; /* Compute # of milliseconds since midnight */ gethrestime(&now); ts = (now.tv_sec % (24 * 60 * 60)) * 1000 + now.tv_nsec / (NANOSEC / MILLISEC); bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN); opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN; break; } break; } } return (B_TRUE); bad_src_route: q = WR(q); if (q->q_next != NULL) ill = q->q_ptr; else ill = NULL; /* make sure we clear any indication of a hardware checksum */ DB_CKSUMFLAGS(mp) = 0; zoneid = ipif_lookup_addr_zoneid(ipha->ipha_dst, ill); if (zoneid == ALL_ZONES) freemsg(mp); else icmp_unreachable(q, mp, ICMP_SOURCE_ROUTE_FAILED, zoneid); return (B_FALSE); } /* * Process IP options in an inbound packet. If an option affects the * effective destination address, return the next hop address via dstp. * Returns -1 if something fails in which case an ICMP error has been sent * and mp freed. */ static int ip_rput_options(queue_t *q, mblk_t *mp, ipha_t *ipha, ipaddr_t *dstp) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; intptr_t code = 0; ire_t *ire = NULL; zoneid_t zoneid; ill_t *ill; ip2dbg(("ip_rput_options\n")); dst = ipha->ipha_dst; for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ip2dbg(("ip_rput_options: opt %d, len %d\n", optval, optlen)); /* * Note: we need to verify the checksum before we * modify anything thus this routine only extracts the next * hop dst from any source route. */ switch (optval) { uint32_t off; case IPOPT_SSRR: case IPOPT_LSRR: ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (ire == NULL) { if (optval == IPOPT_SSRR) { ip1dbg(("ip_rput_options: not next" " strict source route 0x%x\n", ntohl(dst))); code = (char *)&ipha->ipha_dst - (char *)ipha; goto param_prob; /* RouterReq's */ } ip2dbg(("ip_rput_options: " "not next source route 0x%x\n", ntohl(dst))); break; } ire_refrele(ire); if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(( "ip_rput_options: bad option offset\n")); code = (char *)&opt[IPOPT_OLEN] - (char *)ipha; goto param_prob; } off = opt[IPOPT_OFFSET]; off--; redo_srr: if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* End of source route */ ip1dbg(("ip_rput_options: end of SR\n")); break; } bcopy((char *)opt + off, &dst, IP_ADDR_LEN); ip1dbg(("ip_rput_options: next hop 0x%x\n", ntohl(dst))); /* * Check if our address is present more than * once as consecutive hops in source route. * XXX verify per-interface ip_forwarding * for source route? */ ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (ire != NULL) { ire_refrele(ire); off += IP_ADDR_LEN; goto redo_srr; } if (dst == htonl(INADDR_LOOPBACK)) { ip1dbg(("ip_rput_options: loopback addr in " "source route!\n")); goto bad_src_route; } /* * For strict: verify that dst is directly * reachable. */ if (optval == IPOPT_SSRR) { ire = ire_ftable_lookup(dst, 0, 0, IRE_INTERFACE, NULL, NULL, ALL_ZONES, 0, MBLK_GETLABEL(mp), MATCH_IRE_TYPE | MATCH_IRE_SECATTR); if (ire == NULL) { ip1dbg(("ip_rput_options: SSRR not " "directly reachable: 0x%x\n", ntohl(dst))); goto bad_src_route; } ire_refrele(ire); } /* * Defer update of the offset and the record route * until the packet is forwarded. */ break; case IPOPT_RR: if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(( "ip_rput_options: bad option offset\n")); code = (char *)&opt[IPOPT_OLEN] - (char *)ipha; goto param_prob; } break; case IPOPT_TS: /* * Verify that length >= 5 and that there is either * room for another timestamp or that the overflow * counter is not maxed out. */ code = (char *)&opt[IPOPT_OLEN] - (char *)ipha; if (optlen < IPOPT_MINLEN_IT) { goto param_prob; } if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(( "ip_rput_options: bad option offset\n")); code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha; goto param_prob; } switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_TSONLY: off = IPOPT_TS_TIMELEN; break; case IPOPT_TS_TSANDADDR: case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: off = IP_ADDR_LEN + IPOPT_TS_TIMELEN; break; default: code = (char *)&opt[IPOPT_POS_OV_FLG] - (char *)ipha; goto param_prob; } if (opt[IPOPT_OFFSET] - 1 + off > optlen && (opt[IPOPT_POS_OV_FLG] & 0xF0) == 0xF0) { /* * No room and the overflow counter is 15 * already. */ goto param_prob; } break; } } if ((opts.ipoptp_flags & IPOPTP_ERROR) == 0) { *dstp = dst; return (0); } ip1dbg(("ip_rput_options: error processing IP options.")); code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha; param_prob: q = WR(q); if (q->q_next != NULL) ill = q->q_ptr; else ill = NULL; /* make sure we clear any indication of a hardware checksum */ DB_CKSUMFLAGS(mp) = 0; /* Don't know whether this is for non-global or global/forwarding */ zoneid = ipif_lookup_addr_zoneid(dst, ill); if (zoneid == ALL_ZONES) freemsg(mp); else icmp_param_problem(q, mp, (uint8_t)code, zoneid); return (-1); bad_src_route: q = WR(q); if (q->q_next != NULL) ill = q->q_ptr; else ill = NULL; /* make sure we clear any indication of a hardware checksum */ DB_CKSUMFLAGS(mp) = 0; zoneid = ipif_lookup_addr_zoneid(dst, ill); if (zoneid == ALL_ZONES) freemsg(mp); else icmp_unreachable(q, mp, ICMP_SOURCE_ROUTE_FAILED, zoneid); return (-1); } /* * IP & ICMP info in >=14 msg's ... * - ip fixed part (mib2_ip_t) * - icmp fixed part (mib2_icmp_t) * - ipAddrEntryTable (ip 20) all IPv4 ipifs * - ipRouteEntryTable (ip 21) all IPv4 IREs * - ipNetToMediaEntryTable (ip 22) [filled in by the arp module] * - ipRouteAttributeTable (ip 102) labeled routes * - ip multicast membership (ip_member_t) * - ip multicast source filtering (ip_grpsrc_t) * - igmp fixed part (struct igmpstat) * - multicast routing stats (struct mrtstat) * - multicast routing vifs (array of struct vifctl) * - multicast routing routes (array of struct mfcctl) * - ip6 fixed part (mib2_ipv6IfStatsEntry_t) * One per ill plus one generic * - icmp6 fixed part (mib2_ipv6IfIcmpEntry_t) * One per ill plus one generic * - ipv6RouteEntry all IPv6 IREs * - ipv6RouteAttributeTable (ip6 102) labeled routes * - ipv6NetToMediaEntry all Neighbor Cache entries * - ipv6AddrEntry all IPv6 ipifs * - ipv6 multicast membership (ipv6_member_t) * - ipv6 multicast source filtering (ipv6_grpsrc_t) * * MIB2_IP_MEDIA is filled in by the arp module with ARP cache entries. * * NOTE: original mpctl is copied for msg's 2..N, since its ctl part is * already filled in by the caller. * Return value of 0 indicates that no messages were sent and caller * should free mpctl. */ int ip_snmp_get(queue_t *q, mblk_t *mpctl) { if (mpctl == NULL || mpctl->b_cont == NULL) { return (0); } if ((mpctl = ip_snmp_get_mib2_ip(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_icmp(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_icmp6(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_igmp(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_multi(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_addr(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6_addr(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_group_mem(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6_group_mem(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_group_src(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6_group_src(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_virt_multi(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_multi_rtable(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_route_media(q, mpctl)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6_route_media(q, mpctl)) == NULL) { return (1); } if ((mpctl = sctp_snmp_get_mib2(q, mpctl)) == NULL) { return (1); } freemsg(mpctl); return (1); } /* Get global IPv4 statistics */ static mblk_t * ip_snmp_get_mib2_ip(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); /* fixed length IP structure... */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = 0; SET_MIB(ip_mib.ipForwarding, (WE_ARE_FORWARDING ? 1 : 2)); SET_MIB(ip_mib.ipDefaultTTL, (uint32_t)ip_def_ttl); SET_MIB(ip_mib.ipReasmTimeout, ip_g_frag_timeout); SET_MIB(ip_mib.ipAddrEntrySize, sizeof (mib2_ipAddrEntry_t)); SET_MIB(ip_mib.ipRouteEntrySize, sizeof (mib2_ipRouteEntry_t)); SET_MIB(ip_mib.ipNetToMediaEntrySize, sizeof (mib2_ipNetToMediaEntry_t)); SET_MIB(ip_mib.ipMemberEntrySize, sizeof (ip_member_t)); SET_MIB(ip_mib.ipGroupSourceEntrySize, sizeof (ip_grpsrc_t)); SET_MIB(ip_mib.ipRouteAttributeSize, sizeof (mib2_ipAttributeEntry_t)); SET_MIB(ip_mib.transportMLPSize, sizeof (mib2_transportMLPEntry_t)); if (!snmp_append_data(mpctl->b_cont, (char *)&ip_mib, (int)sizeof (ip_mib))) { ip1dbg(("ip_snmp_get_mib2_ip: failed to allocate %u bytes\n", (uint_t)sizeof (ip_mib))); } optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_ip: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* Global IPv4 ICMP statistics */ static mblk_t * ip_snmp_get_mib2_icmp(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* * Make a copy of the original message */ mp2ctl = copymsg(mpctl); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_ICMP; optp->name = 0; if (!snmp_append_data(mpctl->b_cont, (char *)&icmp_mib, (int)sizeof (icmp_mib))) { ip1dbg(("ip_snmp_get_mib2_icmp: failed to allocate %u bytes\n", (uint_t)sizeof (icmp_mib))); } optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_icmp: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* Global IPv4 IGMP statistics */ static mblk_t * ip_snmp_get_mib2_igmp(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = EXPER_IGMP; optp->name = 0; if (!snmp_append_data(mpctl->b_cont, (char *)&igmpstat, (int)sizeof (igmpstat))) { ip1dbg(("ip_snmp_get_mib2_igmp: failed to allocate %u bytes\n", (uint_t)sizeof (igmpstat))); } optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_igmp: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* Global IPv4 Multicast Routing statistics */ static mblk_t * ip_snmp_get_mib2_multi(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = EXPER_DVMRP; optp->name = 0; if (!ip_mroute_stats(mpctl->b_cont)) { ip0dbg(("ip_mroute_stats: failed\n")); } optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_multi: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* IPv4 address information */ static mblk_t * ip_snmp_get_mib2_ip_addr(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; mblk_t *mp_tail = NULL; ill_t *ill; ipif_t *ipif; uint_t bitval; mib2_ipAddrEntry_t mae; zoneid_t zoneid; ill_walk_context_t ctx; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); /* ipAddrEntryTable */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = MIB2_IP_ADDR; zoneid = Q_TO_CONN(q)->conn_zoneid; rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (ipif->ipif_zoneid != zoneid && ipif->ipif_zoneid != ALL_ZONES) continue; mae.ipAdEntInfo.ae_ibcnt = ipif->ipif_ib_pkt_count; mae.ipAdEntInfo.ae_obcnt = ipif->ipif_ob_pkt_count; mae.ipAdEntInfo.ae_focnt = ipif->ipif_fo_pkt_count; (void) ipif_get_name(ipif, mae.ipAdEntIfIndex.o_bytes, OCTET_LENGTH); mae.ipAdEntIfIndex.o_length = mi_strlen(mae.ipAdEntIfIndex.o_bytes); mae.ipAdEntAddr = ipif->ipif_lcl_addr; mae.ipAdEntNetMask = ipif->ipif_net_mask; mae.ipAdEntInfo.ae_subnet = ipif->ipif_subnet; mae.ipAdEntInfo.ae_subnet_len = ip_mask_to_plen(ipif->ipif_net_mask); mae.ipAdEntInfo.ae_src_addr = ipif->ipif_src_addr; for (bitval = 1; bitval && !(bitval & ipif->ipif_brd_addr); bitval <<= 1) noop; mae.ipAdEntBcastAddr = bitval; mae.ipAdEntReasmMaxSize = 65535; mae.ipAdEntInfo.ae_mtu = ipif->ipif_mtu; mae.ipAdEntInfo.ae_metric = ipif->ipif_metric; mae.ipAdEntInfo.ae_broadcast_addr = ipif->ipif_brd_addr; mae.ipAdEntInfo.ae_pp_dst_addr = ipif->ipif_pp_dst_addr; mae.ipAdEntInfo.ae_flags = ipif->ipif_flags | ill->ill_flags | ill->ill_phyint->phyint_flags; if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&mae, (int)sizeof (mib2_ipAddrEntry_t))) { ip1dbg(("ip_snmp_get_mib2_ip_addr: failed to " "allocate %u bytes\n", (uint_t)sizeof (mib2_ipAddrEntry_t))); } } } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_ip_addr: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* IPv6 address information */ static mblk_t * ip_snmp_get_mib2_ip6_addr(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; mblk_t *mp_tail = NULL; ill_t *ill; ipif_t *ipif; mib2_ipv6AddrEntry_t mae6; zoneid_t zoneid; ill_walk_context_t ctx; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); /* ipv6AddrEntryTable */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = MIB2_IP6_ADDR; zoneid = Q_TO_CONN(q)->conn_zoneid; rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (ipif->ipif_zoneid != zoneid && ipif->ipif_zoneid != ALL_ZONES) continue; mae6.ipv6AddrInfo.ae_ibcnt = ipif->ipif_ib_pkt_count; mae6.ipv6AddrInfo.ae_obcnt = ipif->ipif_ob_pkt_count; mae6.ipv6AddrInfo.ae_focnt = ipif->ipif_fo_pkt_count; (void) ipif_get_name(ipif, mae6.ipv6AddrIfIndex.o_bytes, OCTET_LENGTH); mae6.ipv6AddrIfIndex.o_length = mi_strlen(mae6.ipv6AddrIfIndex.o_bytes); mae6.ipv6AddrAddress = ipif->ipif_v6lcl_addr; mae6.ipv6AddrPfxLength = ip_mask_to_plen_v6(&ipif->ipif_v6net_mask); mae6.ipv6AddrInfo.ae_subnet = ipif->ipif_v6subnet; mae6.ipv6AddrInfo.ae_subnet_len = mae6.ipv6AddrPfxLength; mae6.ipv6AddrInfo.ae_src_addr = ipif->ipif_v6src_addr; /* Type: stateless(1), stateful(2), unknown(3) */ if (ipif->ipif_flags & IPIF_ADDRCONF) mae6.ipv6AddrType = 1; else mae6.ipv6AddrType = 2; /* Anycast: true(1), false(2) */ if (ipif->ipif_flags & IPIF_ANYCAST) mae6.ipv6AddrAnycastFlag = 1; else mae6.ipv6AddrAnycastFlag = 2; /* * Address status: preferred(1), deprecated(2), * invalid(3), inaccessible(4), unknown(5) */ if (ipif->ipif_flags & IPIF_NOLOCAL) mae6.ipv6AddrStatus = 3; else if (ipif->ipif_flags & IPIF_DEPRECATED) mae6.ipv6AddrStatus = 2; else mae6.ipv6AddrStatus = 1; mae6.ipv6AddrInfo.ae_mtu = ipif->ipif_mtu; mae6.ipv6AddrInfo.ae_metric = ipif->ipif_metric; mae6.ipv6AddrInfo.ae_pp_dst_addr = ipif->ipif_v6pp_dst_addr; mae6.ipv6AddrInfo.ae_flags = ipif->ipif_flags | ill->ill_flags | ill->ill_phyint->phyint_flags; if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&mae6, (int)sizeof (mib2_ipv6AddrEntry_t))) { ip1dbg(("ip_snmp_get_mib2_ip6_addr: failed to " "allocate %u bytes\n", (uint_t)sizeof (mib2_ipv6AddrEntry_t))); } } } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_ip6_addr: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* IPv4 multicast group membership. */ static mblk_t * ip_snmp_get_mib2_ip_group_mem(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ipif_t *ipif; ilm_t *ilm; ip_member_t ipm; mblk_t *mp_tail = NULL; ill_walk_context_t ctx; zoneid_t zoneid; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); zoneid = Q_TO_CONN(q)->conn_zoneid; /* ipGroupMember table */ optp = (struct opthdr *)&mpctl->b_rptr[ sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = EXPER_IP_GROUP_MEMBERSHIP; rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ILM_WALKER_HOLD(ill); for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (ipif->ipif_zoneid != zoneid && ipif->ipif_zoneid != ALL_ZONES) continue; /* not this zone */ (void) ipif_get_name(ipif, ipm.ipGroupMemberIfIndex.o_bytes, OCTET_LENGTH); ipm.ipGroupMemberIfIndex.o_length = mi_strlen(ipm.ipGroupMemberIfIndex.o_bytes); for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { ASSERT(ilm->ilm_ipif != NULL); ASSERT(ilm->ilm_ill == NULL); if (ilm->ilm_ipif != ipif) continue; ipm.ipGroupMemberAddress = ilm->ilm_addr; ipm.ipGroupMemberRefCnt = ilm->ilm_refcnt; ipm.ipGroupMemberFilterMode = ilm->ilm_fmode; if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&ipm, (int)sizeof (ipm))) { ip1dbg(("ip_snmp_get_mib2_ip_group: " "failed to allocate %u bytes\n", (uint_t)sizeof (ipm))); } } } ILM_WALKER_RELE(ill); } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* IPv6 multicast group membership. */ static mblk_t * ip_snmp_get_mib2_ip6_group_mem(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ilm_t *ilm; ipv6_member_t ipm6; mblk_t *mp_tail = NULL; ill_walk_context_t ctx; zoneid_t zoneid; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); zoneid = Q_TO_CONN(q)->conn_zoneid; /* ip6GroupMember table */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = EXPER_IP6_GROUP_MEMBERSHIP; rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ILM_WALKER_HOLD(ill); ipm6.ipv6GroupMemberIfIndex = ill->ill_phyint->phyint_ifindex; for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { ASSERT(ilm->ilm_ipif == NULL); ASSERT(ilm->ilm_ill != NULL); if (ilm->ilm_zoneid != zoneid) continue; /* not this zone */ ipm6.ipv6GroupMemberAddress = ilm->ilm_v6addr; ipm6.ipv6GroupMemberRefCnt = ilm->ilm_refcnt; ipm6.ipv6GroupMemberFilterMode = ilm->ilm_fmode; if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&ipm6, (int)sizeof (ipm6))) { ip1dbg(("ip_snmp_get_mib2_ip6_group: " "failed to allocate %u bytes\n", (uint_t)sizeof (ipm6))); } } ILM_WALKER_RELE(ill); } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* IP multicast filtered sources */ static mblk_t * ip_snmp_get_mib2_ip_group_src(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ipif_t *ipif; ilm_t *ilm; ip_grpsrc_t ips; mblk_t *mp_tail = NULL; ill_walk_context_t ctx; zoneid_t zoneid; int i; slist_t *sl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); zoneid = Q_TO_CONN(q)->conn_zoneid; /* ipGroupSource table */ optp = (struct opthdr *)&mpctl->b_rptr[ sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = EXPER_IP_GROUP_SOURCES; rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ILM_WALKER_HOLD(ill); for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (ipif->ipif_zoneid != zoneid) continue; /* not this zone */ (void) ipif_get_name(ipif, ips.ipGroupSourceIfIndex.o_bytes, OCTET_LENGTH); ips.ipGroupSourceIfIndex.o_length = mi_strlen(ips.ipGroupSourceIfIndex.o_bytes); for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { ASSERT(ilm->ilm_ipif != NULL); ASSERT(ilm->ilm_ill == NULL); sl = ilm->ilm_filter; if (ilm->ilm_ipif != ipif || SLIST_IS_EMPTY(sl)) continue; ips.ipGroupSourceGroup = ilm->ilm_addr; for (i = 0; i < sl->sl_numsrc; i++) { if (!IN6_IS_ADDR_V4MAPPED( &sl->sl_addr[i])) continue; IN6_V4MAPPED_TO_IPADDR(&sl->sl_addr[i], ips.ipGroupSourceAddress); if (snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&ips, (int)sizeof (ips)) == 0) { ip1dbg(("ip_snmp_get_mib2_" "ip_group_src: failed to " "allocate %u bytes\n", (uint_t)sizeof (ips))); } } } } ILM_WALKER_RELE(ill); } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* IPv6 multicast filtered sources. */ static mblk_t * ip_snmp_get_mib2_ip6_group_src(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ilm_t *ilm; ipv6_grpsrc_t ips6; mblk_t *mp_tail = NULL; ill_walk_context_t ctx; zoneid_t zoneid; int i; slist_t *sl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); zoneid = Q_TO_CONN(q)->conn_zoneid; /* ip6GroupMember table */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = EXPER_IP6_GROUP_SOURCES; rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ILM_WALKER_HOLD(ill); ips6.ipv6GroupSourceIfIndex = ill->ill_phyint->phyint_ifindex; for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { ASSERT(ilm->ilm_ipif == NULL); ASSERT(ilm->ilm_ill != NULL); sl = ilm->ilm_filter; if (ilm->ilm_zoneid != zoneid || SLIST_IS_EMPTY(sl)) continue; ips6.ipv6GroupSourceGroup = ilm->ilm_v6addr; for (i = 0; i < sl->sl_numsrc; i++) { ips6.ipv6GroupSourceAddress = sl->sl_addr[i]; if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&ips6, (int)sizeof (ips6))) { ip1dbg(("ip_snmp_get_mib2_ip6_" "group_src: failed to allocate " "%u bytes\n", (uint_t)sizeof (ips6))); } } } ILM_WALKER_RELE(ill); } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* Multicast routing virtual interface table. */ static mblk_t * ip_snmp_get_mib2_virt_multi(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = EXPER_DVMRP; optp->name = EXPER_DVMRP_VIF; if (!ip_mroute_vif(mpctl->b_cont)) { ip0dbg(("ip_mroute_vif: failed\n")); } optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_virt_multi: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* Multicast routing table. */ static mblk_t * ip_snmp_get_mib2_multi_rtable(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = EXPER_DVMRP; optp->name = EXPER_DVMRP_MRT; if (!ip_mroute_mrt(mpctl->b_cont)) { ip0dbg(("ip_mroute_mrt: failed\n")); } optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_multi_rtable: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* * Return ipRouteEntryTable, ipNetToMediaEntryTable, and ipRouteAttributeTable * in one IRE walk. */ static mblk_t * ip_snmp_get_mib2_ip_route_media(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* Returned */ mblk_t *mp3ctl; /* nettomedia */ mblk_t *mp4ctl; /* routeattrs */ iproutedata_t ird; zoneid_t zoneid; /* * make copies of the original message * - mp2ctl is returned unchanged to the caller for his use * - mpctl is sent upstream as ipRouteEntryTable * - mp3ctl is sent upstream as ipNetToMediaEntryTable * - mp4ctl is sent upstream as ipRouteAttributeTable */ mp2ctl = copymsg(mpctl); mp3ctl = copymsg(mpctl); mp4ctl = copymsg(mpctl); if (mp3ctl == NULL || mp4ctl == NULL) { freemsg(mp4ctl); freemsg(mp3ctl); freemsg(mp2ctl); freemsg(mpctl); return (NULL); } bzero(&ird, sizeof (ird)); ird.ird_route.lp_head = mpctl->b_cont; ird.ird_netmedia.lp_head = mp3ctl->b_cont; ird.ird_attrs.lp_head = mp4ctl->b_cont; zoneid = Q_TO_CONN(q)->conn_zoneid; ire_walk_v4(ip_snmp_get2_v4, &ird, zoneid); if (zoneid == GLOBAL_ZONEID) { /* * Those IREs are used by Mobile-IP; since mipagent(1M) requires * the sys_net_config privilege, it can only run in the global * zone, so we don't display these IREs in the other zones. */ ire_walk_srcif_table_v4(ip_snmp_get2_v4, &ird); ire_walk_ill_mrtun(0, 0, ip_snmp_get2_v4, &ird, NULL); } /* ipRouteEntryTable in mpctl */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = MIB2_IP_ROUTE; optp->len = msgdsize(ird.ird_route.lp_head); ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); /* ipNetToMediaEntryTable in mp3ctl */ optp = (struct opthdr *)&mp3ctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = MIB2_IP_MEDIA; optp->len = msgdsize(ird.ird_netmedia.lp_head); ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mp3ctl); /* ipRouteAttributeTable in mp4ctl */ optp = (struct opthdr *)&mp4ctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = EXPER_IP_RTATTR; optp->len = msgdsize(ird.ird_attrs.lp_head); ip3dbg(("ip_snmp_get_mib2_ip_route_media: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); if (optp->len == 0) freemsg(mp4ctl); else qreply(q, mp4ctl); return (mp2ctl); } /* * Return ipv6RouteEntryTable and ipv6RouteAttributeTable in one IRE walk, and * ipv6NetToMediaEntryTable in an NDP walk. */ static mblk_t * ip_snmp_get_mib2_ip6_route_media(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; /* Returned */ mblk_t *mp3ctl; /* nettomedia */ mblk_t *mp4ctl; /* routeattrs */ iproutedata_t ird; zoneid_t zoneid; /* * make copies of the original message * - mp2ctl is returned unchanged to the caller for his use * - mpctl is sent upstream as ipv6RouteEntryTable * - mp3ctl is sent upstream as ipv6NetToMediaEntryTable * - mp4ctl is sent upstream as ipv6RouteAttributeTable */ mp2ctl = copymsg(mpctl); mp3ctl = copymsg(mpctl); mp4ctl = copymsg(mpctl); if (mp3ctl == NULL || mp4ctl == NULL) { freemsg(mp4ctl); freemsg(mp3ctl); freemsg(mp2ctl); freemsg(mpctl); return (NULL); } bzero(&ird, sizeof (ird)); ird.ird_route.lp_head = mpctl->b_cont; ird.ird_netmedia.lp_head = mp3ctl->b_cont; ird.ird_attrs.lp_head = mp4ctl->b_cont; zoneid = Q_TO_CONN(q)->conn_zoneid; ire_walk_v6(ip_snmp_get2_v6_route, &ird, zoneid); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = MIB2_IP6_ROUTE; optp->len = msgdsize(ird.ird_route.lp_head); ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); /* ipv6NetToMediaEntryTable in mp3ctl */ ndp_walk(NULL, ip_snmp_get2_v6_media, &ird); optp = (struct opthdr *)&mp3ctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = MIB2_IP6_MEDIA; optp->len = msgdsize(ird.ird_netmedia.lp_head); ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mp3ctl); /* ipv6RouteAttributeTable in mp4ctl */ optp = (struct opthdr *)&mp4ctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = EXPER_IP_RTATTR; optp->len = msgdsize(ird.ird_attrs.lp_head); ip3dbg(("ip_snmp_get_mib2_ip6_route_media: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); if (optp->len == 0) freemsg(mp4ctl); else qreply(q, mp4ctl); return (mp2ctl); } /* * ICMPv6 mib: One per ill */ static mblk_t * ip_snmp_get_mib2_ip6(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ill_walk_context_t ctx; mblk_t *mp_tail = NULL; /* * Make a copy of the original message */ mp2ctl = copymsg(mpctl); /* fixed length IPv6 structure ... */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = 0; /* Include "unknown interface" ip6_mib */ ip6_mib.ipv6IfIndex = 0; /* Flag to netstat */ SET_MIB(ip6_mib.ipv6Forwarding, ipv6_forward ? 1 : 2); SET_MIB(ip6_mib.ipv6DefaultHopLimit, ipv6_def_hops); SET_MIB(ip6_mib.ipv6IfStatsEntrySize, sizeof (mib2_ipv6IfStatsEntry_t)); SET_MIB(ip6_mib.ipv6AddrEntrySize, sizeof (mib2_ipv6AddrEntry_t)); SET_MIB(ip6_mib.ipv6RouteEntrySize, sizeof (mib2_ipv6RouteEntry_t)); SET_MIB(ip6_mib.ipv6NetToMediaEntrySize, sizeof (mib2_ipv6NetToMediaEntry_t)); SET_MIB(ip6_mib.ipv6MemberEntrySize, sizeof (ipv6_member_t)); SET_MIB(ip6_mib.ipv6GroupSourceEntrySize, sizeof (ipv6_grpsrc_t)); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&ip6_mib, (int)sizeof (ip6_mib))) { ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate %u bytes\n", (uint_t)sizeof (ip6_mib))); } rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ill->ill_ip6_mib->ipv6IfIndex = ill->ill_phyint->phyint_ifindex; SET_MIB(ill->ill_ip6_mib->ipv6Forwarding, ipv6_forward ? 1 : 2); SET_MIB(ill->ill_ip6_mib->ipv6DefaultHopLimit, ill->ill_max_hops); SET_MIB(ill->ill_ip6_mib->ipv6IfStatsEntrySize, sizeof (mib2_ipv6IfStatsEntry_t)); SET_MIB(ill->ill_ip6_mib->ipv6AddrEntrySize, sizeof (mib2_ipv6AddrEntry_t)); SET_MIB(ill->ill_ip6_mib->ipv6RouteEntrySize, sizeof (mib2_ipv6RouteEntry_t)); SET_MIB(ill->ill_ip6_mib->ipv6NetToMediaEntrySize, sizeof (mib2_ipv6NetToMediaEntry_t)); SET_MIB(ill->ill_ip6_mib->ipv6MemberEntrySize, sizeof (ipv6_member_t)); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)ill->ill_ip6_mib, (int)sizeof (*ill->ill_ip6_mib))) { ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate " "%u bytes\n", (uint_t)sizeof (*ill->ill_ip6_mib))); } } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_ip6: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* * ICMPv6 mib: One per ill */ static mblk_t * ip_snmp_get_mib2_icmp6(queue_t *q, mblk_t *mpctl) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ill_walk_context_t ctx; mblk_t *mp_tail = NULL; /* * Make a copy of the original message */ mp2ctl = copymsg(mpctl); /* fixed length ICMPv6 structure ... */ optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_ICMP6; optp->name = 0; /* Include "unknown interface" icmp6_mib */ icmp6_mib.ipv6IfIcmpIfIndex = 0; /* Flag to netstat */ icmp6_mib.ipv6IfIcmpEntrySize = sizeof (mib2_ipv6IfIcmpEntry_t); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&icmp6_mib, (int)sizeof (icmp6_mib))) { ip1dbg(("ip_snmp_get_mib2_icmp6: failed to allocate %u bytes\n", (uint_t)sizeof (icmp6_mib))); } rw_enter(&ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ill->ill_icmp6_mib->ipv6IfIcmpIfIndex = ill->ill_phyint->phyint_ifindex; ill->ill_icmp6_mib->ipv6IfIcmpEntrySize = sizeof (mib2_ipv6IfIcmpEntry_t); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)ill->ill_icmp6_mib, (int)sizeof (*ill->ill_icmp6_mib))) { ip1dbg(("ip_snmp_get_mib2_icmp6: failed to allocate " "%u bytes\n", (uint_t)sizeof (*ill->ill_icmp6_mib))); } } rw_exit(&ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_icmp6: level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); return (mp2ctl); } /* * ire_walk routine to create both ipRouteEntryTable and * ipRouteAttributeTable in one IRE walk */ static void ip_snmp_get2_v4(ire_t *ire, iproutedata_t *ird) { ill_t *ill; ipif_t *ipif; mib2_ipRouteEntry_t *re; mib2_ipAttributeEntry_t *iae, *iaeptr; ipaddr_t gw_addr; tsol_ire_gw_secattr_t *attrp; tsol_gc_t *gc = NULL; tsol_gcgrp_t *gcgrp = NULL; uint_t sacnt = 0; int i; ASSERT(ire->ire_ipversion == IPV4_VERSION); if ((re = kmem_zalloc(sizeof (*re), KM_NOSLEEP)) == NULL) return; if ((attrp = ire->ire_gw_secattr) != NULL) { mutex_enter(&attrp->igsa_lock); if ((gc = attrp->igsa_gc) != NULL) { gcgrp = gc->gc_grp; ASSERT(gcgrp != NULL); rw_enter(&gcgrp->gcgrp_rwlock, RW_READER); sacnt = 1; } else if ((gcgrp = attrp->igsa_gcgrp) != NULL) { rw_enter(&gcgrp->gcgrp_rwlock, RW_READER); gc = gcgrp->gcgrp_head; sacnt = gcgrp->gcgrp_count; } mutex_exit(&attrp->igsa_lock); /* do nothing if there's no gc to report */ if (gc == NULL) { ASSERT(sacnt == 0); if (gcgrp != NULL) { /* we might as well drop the lock now */ rw_exit(&gcgrp->gcgrp_rwlock); gcgrp = NULL; } attrp = NULL; } ASSERT(gc == NULL || (gcgrp != NULL && RW_LOCK_HELD(&gcgrp->gcgrp_rwlock))); } ASSERT(sacnt == 0 || gc != NULL); if (sacnt != 0 && (iae = kmem_alloc(sacnt * sizeof (*iae), KM_NOSLEEP)) == NULL) { kmem_free(re, sizeof (*re)); rw_exit(&gcgrp->gcgrp_rwlock); return; } /* * Return all IRE types for route table... let caller pick and choose */ re->ipRouteDest = ire->ire_addr; ipif = ire->ire_ipif; re->ipRouteIfIndex.o_length = 0; if (ire->ire_type == IRE_CACHE) { ill = (ill_t *)ire->ire_stq->q_ptr; re->ipRouteIfIndex.o_length = ill->ill_name_length == 0 ? 0 : MIN(OCTET_LENGTH, ill->ill_name_length - 1); bcopy(ill->ill_name, re->ipRouteIfIndex.o_bytes, re->ipRouteIfIndex.o_length); } else if (ipif != NULL) { (void) ipif_get_name(ipif, re->ipRouteIfIndex.o_bytes, OCTET_LENGTH); re->ipRouteIfIndex.o_length = mi_strlen(re->ipRouteIfIndex.o_bytes); } re->ipRouteMetric1 = -1; re->ipRouteMetric2 = -1; re->ipRouteMetric3 = -1; re->ipRouteMetric4 = -1; gw_addr = ire->ire_gateway_addr; if (ire->ire_type & (IRE_INTERFACE|IRE_LOOPBACK|IRE_BROADCAST)) re->ipRouteNextHop = ire->ire_src_addr; else re->ipRouteNextHop = gw_addr; /* indirect(4), direct(3), or invalid(2) */ if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) re->ipRouteType = 2; else re->ipRouteType = (gw_addr != 0) ? 4 : 3; re->ipRouteProto = -1; re->ipRouteAge = gethrestime_sec() - ire->ire_create_time; re->ipRouteMask = ire->ire_mask; re->ipRouteMetric5 = -1; re->ipRouteInfo.re_max_frag = ire->ire_max_frag; re->ipRouteInfo.re_frag_flag = ire->ire_frag_flag; re->ipRouteInfo.re_rtt = ire->ire_uinfo.iulp_rtt; re->ipRouteInfo.re_ref = ire->ire_refcnt; re->ipRouteInfo.re_src_addr = ire->ire_src_addr; re->ipRouteInfo.re_obpkt = ire->ire_ob_pkt_count; re->ipRouteInfo.re_ibpkt = ire->ire_ib_pkt_count; re->ipRouteInfo.re_flags = ire->ire_flags; re->ipRouteInfo.re_in_ill.o_length = 0; if (ire->ire_flags & RTF_DYNAMIC) { re->ipRouteInfo.re_ire_type = IRE_HOST_REDIRECT; } else { re->ipRouteInfo.re_ire_type = ire->ire_type; } if (ire->ire_in_ill != NULL) { re->ipRouteInfo.re_in_ill.o_length = ire->ire_in_ill->ill_name_length == 0 ? 0 : MIN(OCTET_LENGTH, ire->ire_in_ill->ill_name_length - 1); bcopy(ire->ire_in_ill->ill_name, re->ipRouteInfo.re_in_ill.o_bytes, re->ipRouteInfo.re_in_ill.o_length); } re->ipRouteInfo.re_in_src_addr = ire->ire_in_src_addr; if (!snmp_append_data2(ird->ird_route.lp_head, &ird->ird_route.lp_tail, (char *)re, (int)sizeof (*re))) { ip1dbg(("ip_snmp_get2_v4: failed to allocate %u bytes\n", (uint_t)sizeof (*re))); } for (iaeptr = iae, i = 0; i < sacnt; i++, iaeptr++, gc = gc->gc_next) { iaeptr->iae_routeidx = ird->ird_idx; iaeptr->iae_doi = gc->gc_db->gcdb_doi; iaeptr->iae_slrange = gc->gc_db->gcdb_slrange; } if (!snmp_append_data2(ird->ird_attrs.lp_head, &ird->ird_attrs.lp_tail, (char *)iae, sacnt * sizeof (*iae))) { ip1dbg(("ip_snmp_get2_v4: failed to allocate %u bytes\n", (unsigned)(sacnt * sizeof (*iae)))); } /* bump route index for next pass */ ird->ird_idx++; kmem_free(re, sizeof (*re)); if (sacnt != 0) kmem_free(iae, sacnt * sizeof (*iae)); if (gcgrp != NULL) rw_exit(&gcgrp->gcgrp_rwlock); } /* * ire_walk routine to create ipv6RouteEntryTable and ipRouteEntryTable. */ static void ip_snmp_get2_v6_route(ire_t *ire, iproutedata_t *ird) { ill_t *ill; ipif_t *ipif; mib2_ipv6RouteEntry_t *re; mib2_ipAttributeEntry_t *iae, *iaeptr; in6_addr_t gw_addr_v6; tsol_ire_gw_secattr_t *attrp; tsol_gc_t *gc = NULL; tsol_gcgrp_t *gcgrp = NULL; uint_t sacnt = 0; int i; ASSERT(ire->ire_ipversion == IPV6_VERSION); if ((re = kmem_zalloc(sizeof (*re), KM_NOSLEEP)) == NULL) return; if ((attrp = ire->ire_gw_secattr) != NULL) { mutex_enter(&attrp->igsa_lock); if ((gc = attrp->igsa_gc) != NULL) { gcgrp = gc->gc_grp; ASSERT(gcgrp != NULL); rw_enter(&gcgrp->gcgrp_rwlock, RW_READER); sacnt = 1; } else if ((gcgrp = attrp->igsa_gcgrp) != NULL) { rw_enter(&gcgrp->gcgrp_rwlock, RW_READER); gc = gcgrp->gcgrp_head; sacnt = gcgrp->gcgrp_count; } mutex_exit(&attrp->igsa_lock); /* do nothing if there's no gc to report */ if (gc == NULL) { ASSERT(sacnt == 0); if (gcgrp != NULL) { /* we might as well drop the lock now */ rw_exit(&gcgrp->gcgrp_rwlock); gcgrp = NULL; } attrp = NULL; } ASSERT(gc == NULL || (gcgrp != NULL && RW_LOCK_HELD(&gcgrp->gcgrp_rwlock))); } ASSERT(sacnt == 0 || gc != NULL); if (sacnt != 0 && (iae = kmem_alloc(sacnt * sizeof (*iae), KM_NOSLEEP)) == NULL) { kmem_free(re, sizeof (*re)); rw_exit(&gcgrp->gcgrp_rwlock); return; } /* * Return all IRE types for route table... let caller pick and choose */ re->ipv6RouteDest = ire->ire_addr_v6; re->ipv6RoutePfxLength = ip_mask_to_plen_v6(&ire->ire_mask_v6); re->ipv6RouteIndex = 0; /* Unique when multiple with same dest/plen */ re->ipv6RouteIfIndex.o_length = 0; ipif = ire->ire_ipif; if (ire->ire_type == IRE_CACHE) { ill = (ill_t *)ire->ire_stq->q_ptr; re->ipv6RouteIfIndex.o_length = ill->ill_name_length == 0 ? 0 : MIN(OCTET_LENGTH, ill->ill_name_length - 1); bcopy(ill->ill_name, re->ipv6RouteIfIndex.o_bytes, re->ipv6RouteIfIndex.o_length); } else if (ipif != NULL) { (void) ipif_get_name(ipif, re->ipv6RouteIfIndex.o_bytes, OCTET_LENGTH); re->ipv6RouteIfIndex.o_length = mi_strlen(re->ipv6RouteIfIndex.o_bytes); } ASSERT(!(ire->ire_type & IRE_BROADCAST)); mutex_enter(&ire->ire_lock); gw_addr_v6 = ire->ire_gateway_addr_v6; mutex_exit(&ire->ire_lock); if (ire->ire_type & (IRE_INTERFACE|IRE_LOOPBACK)) re->ipv6RouteNextHop = ire->ire_src_addr_v6; else re->ipv6RouteNextHop = gw_addr_v6; /* remote(4), local(3), or discard(2) */ if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) re->ipv6RouteType = 2; else if (IN6_IS_ADDR_UNSPECIFIED(&gw_addr_v6)) re->ipv6RouteType = 3; else re->ipv6RouteType = 4; re->ipv6RouteProtocol = -1; re->ipv6RoutePolicy = 0; re->ipv6RouteAge = gethrestime_sec() - ire->ire_create_time; re->ipv6RouteNextHopRDI = 0; re->ipv6RouteWeight = 0; re->ipv6RouteMetric = 0; re->ipv6RouteInfo.re_max_frag = ire->ire_max_frag; re->ipv6RouteInfo.re_frag_flag = ire->ire_frag_flag; re->ipv6RouteInfo.re_rtt = ire->ire_uinfo.iulp_rtt; re->ipv6RouteInfo.re_src_addr = ire->ire_src_addr_v6; re->ipv6RouteInfo.re_obpkt = ire->ire_ob_pkt_count; re->ipv6RouteInfo.re_ibpkt = ire->ire_ib_pkt_count; re->ipv6RouteInfo.re_ref = ire->ire_refcnt; re->ipv6RouteInfo.re_flags = ire->ire_flags; if (ire->ire_flags & RTF_DYNAMIC) { re->ipv6RouteInfo.re_ire_type = IRE_HOST_REDIRECT; } else { re->ipv6RouteInfo.re_ire_type = ire->ire_type; } if (!snmp_append_data2(ird->ird_route.lp_head, &ird->ird_route.lp_tail, (char *)re, (int)sizeof (*re))) { ip1dbg(("ip_snmp_get2_v6: failed to allocate %u bytes\n", (uint_t)sizeof (*re))); } for (iaeptr = iae, i = 0; i < sacnt; i++, iaeptr++, gc = gc->gc_next) { iaeptr->iae_routeidx = ird->ird_idx; iaeptr->iae_doi = gc->gc_db->gcdb_doi; iaeptr->iae_slrange = gc->gc_db->gcdb_slrange; } if (!snmp_append_data2(ird->ird_attrs.lp_head, &ird->ird_attrs.lp_tail, (char *)iae, sacnt * sizeof (*iae))) { ip1dbg(("ip_snmp_get2_v6: failed to allocate %u bytes\n", (unsigned)(sacnt * sizeof (*iae)))); } /* bump route index for next pass */ ird->ird_idx++; kmem_free(re, sizeof (*re)); if (sacnt != 0) kmem_free(iae, sacnt * sizeof (*iae)); if (gcgrp != NULL) rw_exit(&gcgrp->gcgrp_rwlock); } /* * ndp_walk routine to create ipv6NetToMediaEntryTable */ static int ip_snmp_get2_v6_media(nce_t *nce, iproutedata_t *ird) { ill_t *ill; mib2_ipv6NetToMediaEntry_t ntme; dl_unitdata_req_t *dl; ill = nce->nce_ill; if (ill->ill_isv6 == B_FALSE) /* skip arpce entry */ return (0); /* * Neighbor cache entry attached to IRE with on-link * destination. */ ntme.ipv6NetToMediaIfIndex = ill->ill_phyint->phyint_ifindex; ntme.ipv6NetToMediaNetAddress = nce->nce_addr; if ((ill->ill_flags & ILLF_XRESOLV) && (nce->nce_res_mp != NULL)) { dl = (dl_unitdata_req_t *)(nce->nce_res_mp->b_rptr); ntme.ipv6NetToMediaPhysAddress.o_length = dl->dl_dest_addr_length; } else { ntme.ipv6NetToMediaPhysAddress.o_length = ill->ill_phys_addr_length; } if (nce->nce_res_mp != NULL) { bcopy((char *)nce->nce_res_mp->b_rptr + NCE_LL_ADDR_OFFSET(ill), ntme.ipv6NetToMediaPhysAddress.o_bytes, ntme.ipv6NetToMediaPhysAddress.o_length); } else { bzero(ntme.ipv6NetToMediaPhysAddress.o_bytes, ill->ill_phys_addr_length); } /* * Note: Returns ND_* states. Should be: * reachable(1), stale(2), delay(3), probe(4), * invalid(5), unknown(6) */ ntme.ipv6NetToMediaState = nce->nce_state; ntme.ipv6NetToMediaLastUpdated = 0; /* other(1), dynamic(2), static(3), local(4) */ if (IN6_IS_ADDR_LOOPBACK(&nce->nce_addr)) { ntme.ipv6NetToMediaType = 4; } else if (IN6_IS_ADDR_MULTICAST(&nce->nce_addr)) { ntme.ipv6NetToMediaType = 1; } else { ntme.ipv6NetToMediaType = 2; } if (!snmp_append_data2(ird->ird_netmedia.lp_head, &ird->ird_netmedia.lp_tail, (char *)&ntme, sizeof (ntme))) { ip1dbg(("ip_snmp_get2_v6_media: failed to allocate %u bytes\n", (uint_t)sizeof (ntme))); } return (0); } /* * return (0) if invalid set request, 1 otherwise, including non-tcp requests */ /* ARGSUSED */ int ip_snmp_set(queue_t *q, int level, int name, uchar_t *ptr, int len) { switch (level) { case MIB2_IP: case MIB2_ICMP: switch (name) { default: break; } return (1); default: return (1); } } /* * Called before the options are updated to check if this packet will * be source routed from here. * This routine assumes that the options are well formed i.e. that they * have already been checked. */ static boolean_t ip_source_routed(ipha_t *ipha) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; ire_t *ire; if (IS_SIMPLE_IPH(ipha)) { ip2dbg(("not source routed\n")); return (B_FALSE); } dst = ipha->ipha_dst; for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0); opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ip2dbg(("ip_source_routed: opt %d, len %d\n", optval, optlen)); switch (optval) { uint32_t off; case IPOPT_SSRR: case IPOPT_LSRR: /* * If dst is one of our addresses and there are some * entries left in the source route return (true). */ ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (ire == NULL) { ip2dbg(("ip_source_routed: not next" " source route 0x%x\n", ntohl(dst))); return (B_FALSE); } ire_refrele(ire); off = opt[IPOPT_OFFSET]; off--; if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* End of source route */ ip1dbg(("ip_source_routed: end of SR\n")); return (B_FALSE); } return (B_TRUE); } } ip2dbg(("not source routed\n")); return (B_FALSE); } /* * Check if the packet contains any source route. */ static boolean_t ip_source_route_included(ipha_t *ipha) { ipoptp_t opts; uint8_t optval; if (IS_SIMPLE_IPH(ipha)) return (B_FALSE); for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { switch (optval) { case IPOPT_SSRR: case IPOPT_LSRR: return (B_TRUE); } } return (B_FALSE); } /* * Called when the IRE expiration timer fires. */ /* ARGSUSED */ void ip_trash_timer_expire(void *args) { int flush_flag = 0; /* * ip_ire_expire_id is protected by ip_trash_timer_lock. * This lock makes sure that a new invocation of this function * that occurs due to an almost immediate timer firing will not * progress beyond this point until the current invocation is done */ mutex_enter(&ip_trash_timer_lock); ip_ire_expire_id = 0; mutex_exit(&ip_trash_timer_lock); /* Periodic timer */ if (ip_ire_arp_time_elapsed >= ip_ire_arp_interval) { /* * Remove all IRE_CACHE entries since they might * contain arp information. */ flush_flag |= FLUSH_ARP_TIME; ip_ire_arp_time_elapsed = 0; IP_STAT(ip_ire_arp_timer_expired); } if (ip_ire_rd_time_elapsed >= ip_ire_redir_interval) { /* Remove all redirects */ flush_flag |= FLUSH_REDIRECT_TIME; ip_ire_rd_time_elapsed = 0; IP_STAT(ip_ire_redirect_timer_expired); } if (ip_ire_pmtu_time_elapsed >= ip_ire_pathmtu_interval) { /* Increase path mtu */ flush_flag |= FLUSH_MTU_TIME; ip_ire_pmtu_time_elapsed = 0; IP_STAT(ip_ire_pmtu_timer_expired); } /* * Optimize for the case when there are no redirects in the * ftable, that is, no need to walk the ftable in that case. */ if (flush_flag & (FLUSH_MTU_TIME|FLUSH_ARP_TIME)) { ire_walk_ill_tables(MATCH_IRE_TYPE, IRE_CACHETABLE, ire_expire, (char *)(uintptr_t)flush_flag, IP_MASK_TABLE_SIZE, 0, NULL, ip_cache_table_size, ip_cache_table, NULL, ALL_ZONES); } if ((flush_flag & FLUSH_REDIRECT_TIME) && ip_redirect_cnt > 0) { ire_walk_ill_tables(MATCH_IRE_TYPE, IRE_FORWARDTABLE, ire_expire, (char *)(uintptr_t)flush_flag, IP_MASK_TABLE_SIZE, 0, NULL, 0, NULL, NULL, ALL_ZONES); } if (flush_flag & FLUSH_MTU_TIME) { /* * Walk all IPv6 IRE's and update them * Note that ARP and redirect timers are not * needed since NUD handles stale entries. */ flush_flag = FLUSH_MTU_TIME; ire_walk_v6(ire_expire, (char *)(uintptr_t)flush_flag, ALL_ZONES); } ip_ire_arp_time_elapsed += ip_timer_interval; ip_ire_rd_time_elapsed += ip_timer_interval; ip_ire_pmtu_time_elapsed += ip_timer_interval; /* * Hold the lock to serialize timeout calls and prevent * stale values in ip_ire_expire_id. Otherwise it is possible * for the timer to fire and a new invocation of this function * to start before the return value of timeout has been stored * in ip_ire_expire_id by the current invocation. */ mutex_enter(&ip_trash_timer_lock); ip_ire_expire_id = timeout(ip_trash_timer_expire, NULL, MSEC_TO_TICK(ip_timer_interval)); mutex_exit(&ip_trash_timer_lock); } /* * Called by the memory allocator subsystem directly, when the system * is running low on memory. */ /* ARGSUSED */ void ip_trash_ire_reclaim(void *args) { ire_cache_count_t icc; ire_cache_reclaim_t icr; ncc_cache_count_t ncc; nce_cache_reclaim_t ncr; uint_t delete_cnt; /* * Memory reclaim call back. * Count unused, offlink, pmtu, and onlink IRE_CACHE entries. * Then, with a target of freeing 1/Nth of IRE_CACHE * entries, determine what fraction to free for * each category of IRE_CACHE entries giving absolute priority * in the order of onlink, pmtu, offlink, unused (e.g. no pmtu * entry will be freed unless all offlink entries are freed). */ icc.icc_total = 0; icc.icc_unused = 0; icc.icc_offlink = 0; icc.icc_pmtu = 0; icc.icc_onlink = 0; ire_walk(ire_cache_count, (char *)&icc); /* * Free NCEs for IPv6 like the onlink ires. */ ncc.ncc_total = 0; ncc.ncc_host = 0; ndp_walk(NULL, (pfi_t)ndp_cache_count, (uchar_t *)&ncc); ASSERT(icc.icc_total == icc.icc_unused + icc.icc_offlink + icc.icc_pmtu + icc.icc_onlink); delete_cnt = icc.icc_total/ip_ire_reclaim_fraction; IP_STAT(ip_trash_ire_reclaim_calls); if (delete_cnt == 0) return; IP_STAT(ip_trash_ire_reclaim_success); /* Always delete all unused offlink entries */ icr.icr_unused = 1; if (delete_cnt <= icc.icc_unused) { /* * Only need to free unused entries. In other words, * there are enough unused entries to free to meet our * target number of freed ire cache entries. */ icr.icr_offlink = icr.icr_pmtu = icr.icr_onlink = 0; ncr.ncr_host = 0; } else if (delete_cnt <= icc.icc_unused + icc.icc_offlink) { /* * Only need to free unused entries, plus a fraction of offlink * entries. It follows from the first if statement that * icc_offlink is non-zero, and that delete_cnt != icc_unused. */ delete_cnt -= icc.icc_unused; /* Round up # deleted by truncating fraction */ icr.icr_offlink = icc.icc_offlink / delete_cnt; icr.icr_pmtu = icr.icr_onlink = 0; ncr.ncr_host = 0; } else if (delete_cnt <= icc.icc_unused + icc.icc_offlink + icc.icc_pmtu) { /* * Free all unused and offlink entries, plus a fraction of * pmtu entries. It follows from the previous if statement * that icc_pmtu is non-zero, and that * delete_cnt != icc_unused + icc_offlink. */ icr.icr_offlink = 1; delete_cnt -= icc.icc_unused + icc.icc_offlink; /* Round up # deleted by truncating fraction */ icr.icr_pmtu = icc.icc_pmtu / delete_cnt; icr.icr_onlink = 0; ncr.ncr_host = 0; } else { /* * Free all unused, offlink, and pmtu entries, plus a fraction * of onlink entries. If we're here, then we know that * icc_onlink is non-zero, and that * delete_cnt != icc_unused + icc_offlink + icc_pmtu. */ icr.icr_offlink = icr.icr_pmtu = 1; delete_cnt -= icc.icc_unused + icc.icc_offlink + icc.icc_pmtu; /* Round up # deleted by truncating fraction */ icr.icr_onlink = icc.icc_onlink / delete_cnt; /* Using the same delete fraction as for onlink IREs */ ncr.ncr_host = ncc.ncc_host / delete_cnt; } #ifdef DEBUG ip1dbg(("IP reclaim: target %d out of %d current %d/%d/%d/%d " "fractions %d/%d/%d/%d\n", icc.icc_total/ip_ire_reclaim_fraction, icc.icc_total, icc.icc_unused, icc.icc_offlink, icc.icc_pmtu, icc.icc_onlink, icr.icr_unused, icr.icr_offlink, icr.icr_pmtu, icr.icr_onlink)); #endif ire_walk(ire_cache_reclaim, (char *)&icr); if (ncr.ncr_host != 0) ndp_walk(NULL, (pfi_t)ndp_cache_reclaim, (uchar_t *)&ncr); #ifdef DEBUG icc.icc_total = 0; icc.icc_unused = 0; icc.icc_offlink = 0; icc.icc_pmtu = 0; icc.icc_onlink = 0; ire_walk(ire_cache_count, (char *)&icc); ip1dbg(("IP reclaim: result total %d %d/%d/%d/%d\n", icc.icc_total, icc.icc_unused, icc.icc_offlink, icc.icc_pmtu, icc.icc_onlink)); #endif } /* * ip_unbind is called when a copy of an unbind request is received from the * upper level protocol. We remove this conn from any fanout hash list it is * on, and zero out the bind information. No reply is expected up above. */ mblk_t * ip_unbind(queue_t *q, mblk_t *mp) { conn_t *connp = Q_TO_CONN(q); ASSERT(!MUTEX_HELD(&connp->conn_lock)); if (is_system_labeled() && connp->conn_anon_port) { (void) tsol_mlp_anon(crgetzone(connp->conn_cred), connp->conn_mlp_type, connp->conn_ulp, ntohs(connp->conn_lport), B_FALSE); connp->conn_anon_port = 0; } connp->conn_mlp_type = mlptSingle; ipcl_hash_remove(connp); ASSERT(mp->b_cont == NULL); /* * Convert mp into a T_OK_ACK */ mp = mi_tpi_ok_ack_alloc(mp); /* * should not happen in practice... T_OK_ACK is smaller than the * original message. */ if (mp == NULL) return (NULL); /* * Don't bzero the ports if its TCP since TCP still needs the * lport to remove it from its own bind hash. TCP will do the * cleanup. */ if (!IPCL_IS_TCP(connp)) bzero(&connp->u_port, sizeof (connp->u_port)); return (mp); } /* * Write side put procedure. Outbound data, IOCTLs, responses from * resolvers, etc, come down through here. * * arg2 is always a queue_t *. * When that queue is an ill_t (i.e. q_next != NULL), then arg must be * the zoneid. * When that queue is not an ill_t, then arg must be a conn_t pointer. */ void ip_output(void *arg, mblk_t *mp, void *arg2, int caller) { conn_t *connp = NULL; queue_t *q = (queue_t *)arg2; ipha_t *ipha; #define rptr ((uchar_t *)ipha) ire_t *ire = NULL; ire_t *sctp_ire = NULL; uint32_t v_hlen_tos_len; ipaddr_t dst; mblk_t *first_mp = NULL; boolean_t mctl_present; ipsec_out_t *io; int match_flags; ill_t *attach_ill = NULL; /* Bind to IPIF_NOFAILOVER ill etc. */ ill_t *xmit_ill = NULL; /* IP_XMIT_IF etc. */ ipif_t *dst_ipif; boolean_t multirt_need_resolve = B_FALSE; mblk_t *copy_mp = NULL; int err; zoneid_t zoneid; int adjust; uint16_t iplen; boolean_t need_decref = B_FALSE; boolean_t ignore_dontroute = B_FALSE; boolean_t ignore_nexthop = B_FALSE; boolean_t ip_nexthop = B_FALSE; ipaddr_t nexthop_addr; #ifdef _BIG_ENDIAN #define V_HLEN (v_hlen_tos_len >> 24) #else #define V_HLEN (v_hlen_tos_len & 0xFF) #endif TRACE_1(TR_FAC_IP, TR_IP_WPUT_START, "ip_wput_start: q %p", q); /* * ip_wput fast path */ /* is packet from ARP ? */ if (q->q_next != NULL) { zoneid = (zoneid_t)(uintptr_t)arg; goto qnext; } connp = (conn_t *)arg; ASSERT(connp != NULL); zoneid = connp->conn_zoneid; /* is queue flow controlled? */ if ((q->q_first != NULL || connp->conn_draining) && (caller == IP_WPUT)) { ASSERT(!need_decref); (void) putq(q, mp); return; } /* Multidata transmit? */ if (DB_TYPE(mp) == M_MULTIDATA) { /* * We should never get here, since all Multidata messages * originating from tcp should have been directed over to * tcp_multisend() in the first place. */ BUMP_MIB(&ip_mib, ipOutDiscards); freemsg(mp); return; } else if (DB_TYPE(mp) != M_DATA) goto notdata; if (mp->b_flag & MSGHASREF) { ASSERT(connp->conn_ulp == IPPROTO_SCTP); mp->b_flag &= ~MSGHASREF; SCTP_EXTRACT_IPINFO(mp, sctp_ire); need_decref = B_TRUE; } ipha = (ipha_t *)mp->b_rptr; /* is IP header non-aligned or mblk smaller than basic IP header */ #ifndef SAFETY_BEFORE_SPEED if (!OK_32PTR(rptr) || (mp->b_wptr - rptr) < IP_SIMPLE_HDR_LENGTH) goto hdrtoosmall; #endif ASSERT(OK_32PTR(ipha)); /* * This function assumes that mp points to an IPv4 packet. If it's the * wrong version, we'll catch it again in ip_output_v6. * * Note that this is *only* locally-generated output here, and never * forwarded data, and that we need to deal only with transports that * don't know how to label. (TCP, UDP, and ICMP/raw-IP all know how to * label.) */ if (is_system_labeled() && (ipha->ipha_version_and_hdr_length & 0xf0) == (IPV4_VERSION << 4) && !connp->conn_ulp_labeled) { err = tsol_check_label(BEST_CRED(mp, connp), &mp, &adjust, connp->conn_mac_exempt); ipha = (ipha_t *)mp->b_rptr; if (err != 0) { first_mp = mp; if (err == EINVAL) goto icmp_parameter_problem; ip2dbg(("ip_wput: label check failed (%d)\n", err)); goto drop_pkt; } iplen = ntohs(ipha->ipha_length) + adjust; ipha->ipha_length = htons(iplen); } /* * If there is a policy, try to attach an ipsec_out in * the front. At the end, first_mp either points to a * M_DATA message or IPSEC_OUT message linked to a * M_DATA message. We have to do it now as we might * lose the "conn" if we go through ip_newroute. */ if (connp->conn_out_enforce_policy || (connp->conn_latch != NULL)) { if (((mp = ipsec_attach_ipsec_out(mp, connp, NULL, ipha->ipha_protocol)) == NULL)) { if (need_decref) CONN_DEC_REF(connp); return; } else { ASSERT(mp->b_datap->db_type == M_CTL); first_mp = mp; mp = mp->b_cont; mctl_present = B_TRUE; } } else { first_mp = mp; mctl_present = B_FALSE; } v_hlen_tos_len = ((uint32_t *)ipha)[0]; /* is wrong version or IP options present */ if (V_HLEN != IP_SIMPLE_HDR_VERSION) goto version_hdrlen_check; dst = ipha->ipha_dst; if (connp->conn_nofailover_ill != NULL) { attach_ill = conn_get_held_ill(connp, &connp->conn_nofailover_ill, &err); if (err == ILL_LOOKUP_FAILED) { if (need_decref) CONN_DEC_REF(connp); freemsg(first_mp); return; } } /* is packet multicast? */ if (CLASSD(dst)) goto multicast; if ((connp->conn_dontroute) || (connp->conn_xmit_if_ill != NULL) || (connp->conn_nexthop_set)) { /* * If the destination is a broadcast or a loopback * address, SO_DONTROUTE, IP_XMIT_IF and IP_NEXTHOP go * through the standard path. But in the case of local * destination only SO_DONTROUTE and IP_NEXTHOP go through * the standard path not IP_XMIT_IF. */ ire = ire_cache_lookup(dst, zoneid, MBLK_GETLABEL(mp)); if ((ire == NULL) || ((ire->ire_type != IRE_BROADCAST) && (ire->ire_type != IRE_LOOPBACK))) { if ((connp->conn_dontroute || connp->conn_nexthop_set) && (ire != NULL) && (ire->ire_type == IRE_LOCAL)) goto standard_path; if (ire != NULL) { ire_refrele(ire); /* No more access to ire */ ire = NULL; } /* * bypass routing checks and go directly to * interface. */ if (connp->conn_dontroute) { goto dontroute; } else if (connp->conn_nexthop_set) { ip_nexthop = B_TRUE; nexthop_addr = connp->conn_nexthop_v4; goto send_from_ill; } /* * If IP_XMIT_IF socket option is set, * then we allow unicast and multicast * packets to go through the ill. It is * quite possible that the destination * is not in the ire cache table and we * do not want to go to ip_newroute() * instead we call ip_newroute_ipif. */ xmit_ill = conn_get_held_ill(connp, &connp->conn_xmit_if_ill, &err); if (err == ILL_LOOKUP_FAILED) { if (attach_ill != NULL) ill_refrele(attach_ill); if (need_decref) CONN_DEC_REF(connp); freemsg(first_mp); return; } goto send_from_ill; } standard_path: /* Must be a broadcast, a loopback or a local ire */ if (ire != NULL) { ire_refrele(ire); /* No more access to ire */ ire = NULL; } } if (attach_ill != NULL) goto send_from_ill; /* * We cache IRE_CACHEs to avoid lookups. We don't do * this for the tcp global queue and listen end point * as it does not really have a real destination to * talk to. This is also true for SCTP. */ if (IP_FLOW_CONTROLLED_ULP(connp->conn_ulp) && !connp->conn_fully_bound) { ire = ire_cache_lookup(dst, zoneid, MBLK_GETLABEL(mp)); if (ire == NULL) goto noirefound; TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "end"); /* * Check if the ire has the RTF_MULTIRT flag, inherited * from an IRE_OFFSUBNET ire entry in ip_newroute(). */ if (ire->ire_flags & RTF_MULTIRT) { /* * Force the TTL of multirouted packets if required. * The TTL of such packets is bounded by the * ip_multirt_ttl ndd variable. */ if ((ip_multirt_ttl > 0) && (ipha->ipha_ttl > ip_multirt_ttl)) { ip2dbg(("ip_wput: forcing multirt TTL to %d " "(was %d), dst 0x%08x\n", ip_multirt_ttl, ipha->ipha_ttl, ntohl(ire->ire_addr))); ipha->ipha_ttl = ip_multirt_ttl; } /* * We look at this point if there are pending * unresolved routes. ire_multirt_resolvable() * checks in O(n) that all IRE_OFFSUBNET ire * entries for the packet's destination and * flagged RTF_MULTIRT are currently resolved. * If some remain unresolved, we make a copy * of the current message. It will be used * to initiate additional route resolutions. */ multirt_need_resolve = ire_multirt_need_resolve(ire->ire_addr, MBLK_GETLABEL(first_mp)); ip2dbg(("ip_wput[TCP]: ire %p, " "multirt_need_resolve %d, first_mp %p\n", (void *)ire, multirt_need_resolve, (void *)first_mp)); if (multirt_need_resolve) { copy_mp = copymsg(first_mp); if (copy_mp != NULL) { MULTIRT_DEBUG_TAG(copy_mp); } } } ip_wput_ire(q, first_mp, ire, connp, caller, zoneid); /* * Try to resolve another multiroute if * ire_multirt_need_resolve() deemed it necessary. */ if (copy_mp != NULL) { ip_newroute(q, copy_mp, dst, NULL, connp, zoneid); } if (need_decref) CONN_DEC_REF(connp); return; } /* * Access to conn_ire_cache. (protected by conn_lock) * * IRE_MARK_CONDEMNED is marked in ire_delete. We don't grab * the ire bucket lock here to check for CONDEMNED as it is okay to * send a packet or two with the IRE_CACHE that is going away. * Access to the ire requires an ire refhold on the ire prior to * its use since an interface unplumb thread may delete the cached * ire and release the refhold at any time. * * Caching an ire in the conn_ire_cache * * o Caching an ire pointer in the conn requires a strict check for * IRE_MARK_CONDEMNED. An interface unplumb thread deletes all relevant * ires before cleaning up the conns. So the caching of an ire pointer * in the conn is done after making sure under the bucket lock that the * ire has not yet been marked CONDEMNED. Otherwise we will end up * caching an ire after the unplumb thread has cleaned up the conn. * If the conn does not send a packet subsequently the unplumb thread * will be hanging waiting for the ire count to drop to zero. * * o We also need to atomically test for a null conn_ire_cache and * set the conn_ire_cache under the the protection of the conn_lock * to avoid races among concurrent threads trying to simultaneously * cache an ire in the conn_ire_cache. */ mutex_enter(&connp->conn_lock); ire = sctp_ire != NULL ? sctp_ire : connp->conn_ire_cache; if (ire != NULL && ire->ire_addr == dst && !(ire->ire_marks & IRE_MARK_CONDEMNED)) { IRE_REFHOLD(ire); mutex_exit(&connp->conn_lock); } else { boolean_t cached = B_FALSE; connp->conn_ire_cache = NULL; mutex_exit(&connp->conn_lock); /* Release the old ire */ if (ire != NULL && sctp_ire == NULL) IRE_REFRELE_NOTR(ire); ire = ire_cache_lookup(dst, zoneid, MBLK_GETLABEL(mp)); if (ire == NULL) goto noirefound; IRE_REFHOLD_NOTR(ire); mutex_enter(&connp->conn_lock); if (!(connp->conn_state_flags & CONN_CLOSING) && connp->conn_ire_cache == NULL) { rw_enter(&ire->ire_bucket->irb_lock, RW_READER); if (!(ire->ire_marks & IRE_MARK_CONDEMNED)) { connp->conn_ire_cache = ire; cached = B_TRUE; } rw_exit(&ire->ire_bucket->irb_lock); } mutex_exit(&connp->conn_lock); /* * We can continue to use the ire but since it was * not cached, we should drop the extra reference. */ if (!cached) IRE_REFRELE_NOTR(ire); } TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "end"); /* * Check if the ire has the RTF_MULTIRT flag, inherited * from an IRE_OFFSUBNET ire entry in ip_newroute(). */ if (ire->ire_flags & RTF_MULTIRT) { /* * Force the TTL of multirouted packets if required. * The TTL of such packets is bounded by the * ip_multirt_ttl ndd variable. */ if ((ip_multirt_ttl > 0) && (ipha->ipha_ttl > ip_multirt_ttl)) { ip2dbg(("ip_wput: forcing multirt TTL to %d " "(was %d), dst 0x%08x\n", ip_multirt_ttl, ipha->ipha_ttl, ntohl(ire->ire_addr))); ipha->ipha_ttl = ip_multirt_ttl; } /* * At this point, we check to see if there are any pending * unresolved routes. ire_multirt_resolvable() * checks in O(n) that all IRE_OFFSUBNET ire * entries for the packet's destination and * flagged RTF_MULTIRT are currently resolved. * If some remain unresolved, we make a copy * of the current message. It will be used * to initiate additional route resolutions. */ multirt_need_resolve = ire_multirt_need_resolve(ire->ire_addr, MBLK_GETLABEL(first_mp)); ip2dbg(("ip_wput[not TCP]: ire %p, " "multirt_need_resolve %d, first_mp %p\n", (void *)ire, multirt_need_resolve, (void *)first_mp)); if (multirt_need_resolve) { copy_mp = copymsg(first_mp); if (copy_mp != NULL) { MULTIRT_DEBUG_TAG(copy_mp); } } } ip_wput_ire(q, first_mp, ire, connp, caller, zoneid); /* * Try to resolve another multiroute if * ire_multirt_resolvable() deemed it necessary */ if (copy_mp != NULL) { ip_newroute(q, copy_mp, dst, NULL, connp, zoneid); } if (need_decref) CONN_DEC_REF(connp); return; qnext: /* * Upper Level Protocols pass down complete IP datagrams * as M_DATA messages. Everything else is a sideshow. * * 1) We could be re-entering ip_wput because of ip_neworute * in which case we could have a IPSEC_OUT message. We * need to pass through ip_wput like other datagrams and * hence cannot branch to ip_wput_nondata. * * 2) ARP, AH, ESP, and other clients who are on the module * instance of IP stream, give us something to deal with. * We will handle AH and ESP here and rest in ip_wput_nondata. * * 3) ICMP replies also could come here. */ if (DB_TYPE(mp) != M_DATA) { notdata: if (DB_TYPE(mp) == M_CTL) { /* * M_CTL messages are used by ARP, AH and ESP to * communicate with IP. We deal with IPSEC_IN and * IPSEC_OUT here. ip_wput_nondata handles other * cases. */ ipsec_info_t *ii = (ipsec_info_t *)mp->b_rptr; if (mp->b_cont && (mp->b_cont->b_flag & MSGHASREF)) { first_mp = mp->b_cont; first_mp->b_flag &= ~MSGHASREF; ASSERT(connp->conn_ulp == IPPROTO_SCTP); SCTP_EXTRACT_IPINFO(first_mp, sctp_ire); CONN_DEC_REF(connp); connp = NULL; } if (ii->ipsec_info_type == IPSEC_IN) { /* * Either this message goes back to * IPSEC for further processing or to * ULP after policy checks. */ ip_fanout_proto_again(mp, NULL, NULL, NULL); return; } else if (ii->ipsec_info_type == IPSEC_OUT) { io = (ipsec_out_t *)ii; if (io->ipsec_out_proc_begin) { /* * IPSEC processing has already started. * Complete it. * IPQoS notes: We don't care what is * in ipsec_out_ill_index since this * won't be processed for IPQoS policies * in ipsec_out_process. */ ipsec_out_process(q, mp, NULL, io->ipsec_out_ill_index); return; } else { connp = (q->q_next != NULL) ? NULL : Q_TO_CONN(q); first_mp = mp; mp = mp->b_cont; mctl_present = B_TRUE; } zoneid = io->ipsec_out_zoneid; ASSERT(zoneid != ALL_ZONES); } else if (ii->ipsec_info_type == IPSEC_CTL) { /* * It's an IPsec control message requesting * an SADB update to be sent to the IPsec * hardware acceleration capable ills. */ ipsec_ctl_t *ipsec_ctl = (ipsec_ctl_t *)mp->b_rptr; ipsa_t *sa = (ipsa_t *)ipsec_ctl->ipsec_ctl_sa; uint_t satype = ipsec_ctl->ipsec_ctl_sa_type; mblk_t *cmp = mp->b_cont; ASSERT(MBLKL(mp) >= sizeof (ipsec_ctl_t)); ASSERT(cmp != NULL); freeb(mp); ill_ipsec_capab_send_all(satype, cmp, sa); return; } else { /* * This must be ARP or special TSOL signaling. */ ip_wput_nondata(NULL, q, mp, NULL); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "nondata"); return; } } else { /* * This must be non-(ARP/AH/ESP) messages. */ ASSERT(!need_decref); ip_wput_nondata(NULL, q, mp, NULL); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "nondata"); return; } } else { first_mp = mp; mctl_present = B_FALSE; } ASSERT(first_mp != NULL); /* * ICMP echo replies attach an ipsec_out and set ipsec_out_attach_if * to make sure that this packet goes out on the same interface it * came in. We handle that here. */ if (mctl_present) { uint_t ifindex; io = (ipsec_out_t *)first_mp->b_rptr; if (io->ipsec_out_attach_if || io->ipsec_out_xmit_if || io->ipsec_out_ip_nexthop) { ill_t *ill; /* * We may have lost the conn context if we are * coming here from ip_newroute(). Copy the * nexthop information. */ if (io->ipsec_out_ip_nexthop) { ip_nexthop = B_TRUE; nexthop_addr = io->ipsec_out_nexthop_addr; ipha = (ipha_t *)mp->b_rptr; dst = ipha->ipha_dst; goto send_from_ill; } else { ASSERT(io->ipsec_out_ill_index != 0); ifindex = io->ipsec_out_ill_index; ill = ill_lookup_on_ifindex(ifindex, B_FALSE, NULL, NULL, NULL, NULL); /* * ipsec_out_xmit_if bit is used to tell * ip_wput to use the ill to send outgoing data * as we have no conn when data comes from ICMP * error msg routines. Currently this feature is * only used by ip_mrtun_forward routine. */ if (io->ipsec_out_xmit_if) { xmit_ill = ill; if (xmit_ill == NULL) { ip1dbg(("ip_output:bad ifindex " "for xmit_ill %d\n", ifindex)); freemsg(first_mp); BUMP_MIB(&ip_mib, ipOutDiscards); ASSERT(!need_decref); return; } /* Free up the ipsec_out_t mblk */ ASSERT(first_mp->b_cont == mp); first_mp->b_cont = NULL; freeb(first_mp); /* Just send the IP header+ICMP+data */ first_mp = mp; ipha = (ipha_t *)mp->b_rptr; dst = ipha->ipha_dst; goto send_from_ill; } else { attach_ill = ill; } if (attach_ill == NULL) { ASSERT(xmit_ill == NULL); ip1dbg(("ip_output: bad ifindex for " "(BIND TO IPIF_NOFAILOVER) %d\n", ifindex)); freemsg(first_mp); BUMP_MIB(&ip_mib, ipOutDiscards); ASSERT(!need_decref); return; } } } } ASSERT(xmit_ill == NULL); /* We have a complete IP datagram heading outbound. */ ipha = (ipha_t *)mp->b_rptr; #ifndef SPEED_BEFORE_SAFETY /* * Make sure we have a full-word aligned message and that at least * a simple IP header is accessible in the first message. If not, * try a pullup. */ if (!OK_32PTR(rptr) || (mp->b_wptr - rptr) < IP_SIMPLE_HDR_LENGTH) { hdrtoosmall: if (!pullupmsg(mp, IP_SIMPLE_HDR_LENGTH)) { BUMP_MIB(&ip_mib, ipOutDiscards); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "pullupfailed"); if (first_mp == NULL) first_mp = mp; goto drop_pkt; } /* This function assumes that mp points to an IPv4 packet. */ if (is_system_labeled() && q->q_next == NULL && (*mp->b_rptr & 0xf0) == (IPV4_VERSION << 4) && !connp->conn_ulp_labeled) { err = tsol_check_label(BEST_CRED(mp, connp), &mp, &adjust, connp->conn_mac_exempt); ipha = (ipha_t *)mp->b_rptr; if (first_mp != NULL) first_mp->b_cont = mp; if (err != 0) { if (first_mp == NULL) first_mp = mp; if (err == EINVAL) goto icmp_parameter_problem; ip2dbg(("ip_wput: label check failed (%d)\n", err)); goto drop_pkt; } iplen = ntohs(ipha->ipha_length) + adjust; ipha->ipha_length = htons(iplen); } ipha = (ipha_t *)mp->b_rptr; if (first_mp == NULL) { ASSERT(attach_ill == NULL && xmit_ill == NULL); /* * If we got here because of "goto hdrtoosmall" * We need to attach a IPSEC_OUT. */ if (connp->conn_out_enforce_policy) { if (((mp = ipsec_attach_ipsec_out(mp, connp, NULL, ipha->ipha_protocol)) == NULL)) { if (need_decref) CONN_DEC_REF(connp); return; } else { ASSERT(mp->b_datap->db_type == M_CTL); first_mp = mp; mp = mp->b_cont; mctl_present = B_TRUE; } } else { first_mp = mp; mctl_present = B_FALSE; } } } #endif /* Most of the code below is written for speed, not readability */ v_hlen_tos_len = ((uint32_t *)ipha)[0]; /* * If ip_newroute() fails, we're going to need a full * header for the icmp wraparound. */ if (V_HLEN != IP_SIMPLE_HDR_VERSION) { uint_t v_hlen; version_hdrlen_check: ASSERT(first_mp != NULL); v_hlen = V_HLEN; /* * siphon off IPv6 packets coming down from transport * layer modules here. * Note: high-order bit carries NUD reachability confirmation */ if (((v_hlen >> 4) & 0x7) == IPV6_VERSION) { /* * XXX implement a IPv4 and IPv6 packet counter per * conn and switch when ratio exceeds e.g. 10:1 */ #ifdef notyet if (q->q_next == NULL) /* Avoid ill queue */ ip_setqinfo(RD(q), B_TRUE, B_TRUE); #endif BUMP_MIB(&ip_mib, ipOutIPv6); ASSERT(xmit_ill == NULL); if (attach_ill != NULL) ill_refrele(attach_ill); if (need_decref) mp->b_flag |= MSGHASREF; (void) ip_output_v6(arg, first_mp, arg2, caller); return; } if ((v_hlen >> 4) != IP_VERSION) { BUMP_MIB(&ip_mib, ipOutDiscards); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "badvers"); goto drop_pkt; } /* * Is the header length at least 20 bytes? * * Are there enough bytes accessible in the header? If * not, try a pullup. */ v_hlen &= 0xF; v_hlen <<= 2; if (v_hlen < IP_SIMPLE_HDR_LENGTH) { BUMP_MIB(&ip_mib, ipOutDiscards); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "badlen"); goto drop_pkt; } if (v_hlen > (mp->b_wptr - rptr)) { if (!pullupmsg(mp, v_hlen)) { BUMP_MIB(&ip_mib, ipOutDiscards); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "badpullup2"); goto drop_pkt; } ipha = (ipha_t *)mp->b_rptr; } /* * Move first entry from any source route into ipha_dst and * verify the options */ if (ip_wput_options(q, first_mp, ipha, mctl_present, zoneid)) { ASSERT(xmit_ill == NULL); if (attach_ill != NULL) ill_refrele(attach_ill); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "badopts"); if (need_decref) CONN_DEC_REF(connp); return; } } dst = ipha->ipha_dst; /* * Try to get an IRE_CACHE for the destination address. If we can't, * we have to run the packet through ip_newroute which will take * the appropriate action to arrange for an IRE_CACHE, such as querying * a resolver, or assigning a default gateway, etc. */ if (CLASSD(dst)) { ipif_t *ipif; uint32_t setsrc = 0; multicast: ASSERT(first_mp != NULL); ASSERT(xmit_ill == NULL); ip2dbg(("ip_wput: CLASSD\n")); if (connp == NULL) { /* * Use the first good ipif on the ill. * XXX Should this ever happen? (Appears * to show up with just ppp and no ethernet due * to in.rdisc.) * However, ire_send should be able to * call ip_wput_ire directly. * * XXX Also, this can happen for ICMP and other packets * with multicast source addresses. Perhaps we should * fix things so that we drop the packet in question, * but for now, just run with it. */ ill_t *ill = (ill_t *)q->q_ptr; /* * Don't honor attach_if for this case. If ill * is part of the group, ipif could belong to * any ill and we cannot maintain attach_ill * and ipif_ill same anymore and the assert * below would fail. */ if (mctl_present && io->ipsec_out_attach_if) { io->ipsec_out_ill_index = 0; io->ipsec_out_attach_if = B_FALSE; ASSERT(attach_ill != NULL); ill_refrele(attach_ill); attach_ill = NULL; } ASSERT(attach_ill == NULL); ipif = ipif_select_source(ill, dst, GLOBAL_ZONEID); if (ipif == NULL) { if (need_decref) CONN_DEC_REF(connp); freemsg(first_mp); return; } ip1dbg(("ip_wput: CLASSD no CONN: dst 0x%x on %s\n", ntohl(dst), ill->ill_name)); } else { /* * If both IP_MULTICAST_IF and IP_XMIT_IF are set, * IP_XMIT_IF is honoured. * Block comment above this function explains the * locking mechanism used here */ xmit_ill = conn_get_held_ill(connp, &connp->conn_xmit_if_ill, &err); if (err == ILL_LOOKUP_FAILED) { ip1dbg(("ip_wput: No ill for IP_XMIT_IF\n")); goto drop_pkt; } if (xmit_ill == NULL) { ipif = conn_get_held_ipif(connp, &connp->conn_multicast_ipif, &err); if (err == IPIF_LOOKUP_FAILED) { ip1dbg(("ip_wput: No ipif for " "multicast\n")); BUMP_MIB(&ip_mib, ipOutNoRoutes); goto drop_pkt; } } if (xmit_ill != NULL) { ipif = ipif_get_next_ipif(NULL, xmit_ill); if (ipif == NULL) { ip1dbg(("ip_wput: No ipif for " "IP_XMIT_IF\n")); BUMP_MIB(&ip_mib, ipOutNoRoutes); goto drop_pkt; } } else if (ipif == NULL || ipif->ipif_isv6) { /* * We must do this ipif determination here * else we could pass through ip_newroute * and come back here without the conn context. * * Note: we do late binding i.e. we bind to * the interface when the first packet is sent. * For performance reasons we do not rebind on * each packet but keep the binding until the * next IP_MULTICAST_IF option. * * conn_multicast_{ipif,ill} are shared between * IPv4 and IPv6 and AF_INET6 sockets can * send both IPv4 and IPv6 packets. Hence * we have to check that "isv6" matches above. */ if (ipif != NULL) ipif_refrele(ipif); ipif = ipif_lookup_group(dst, zoneid); if (ipif == NULL) { ip1dbg(("ip_wput: No ipif for " "multicast\n")); BUMP_MIB(&ip_mib, ipOutNoRoutes); goto drop_pkt; } err = conn_set_held_ipif(connp, &connp->conn_multicast_ipif, ipif); if (err == IPIF_LOOKUP_FAILED) { ipif_refrele(ipif); ip1dbg(("ip_wput: No ipif for " "multicast\n")); BUMP_MIB(&ip_mib, ipOutNoRoutes); goto drop_pkt; } } } ASSERT(!ipif->ipif_isv6); /* * As we may lose the conn by the time we reach ip_wput_ire, * we copy conn_multicast_loop and conn_dontroute on to an * ipsec_out. In case if this datagram goes out secure, * we need the ill_index also. Copy that also into the * ipsec_out. */ if (mctl_present) { io = (ipsec_out_t *)first_mp->b_rptr; ASSERT(first_mp->b_datap->db_type == M_CTL); ASSERT(io->ipsec_out_type == IPSEC_OUT); } else { ASSERT(mp == first_mp); if ((first_mp = allocb(sizeof (ipsec_info_t), BPRI_HI)) == NULL) { ipif_refrele(ipif); first_mp = mp; goto drop_pkt; } first_mp->b_datap->db_type = M_CTL; first_mp->b_wptr += sizeof (ipsec_info_t); /* ipsec_out_secure is B_FALSE now */ bzero(first_mp->b_rptr, sizeof (ipsec_info_t)); io = (ipsec_out_t *)first_mp->b_rptr; io->ipsec_out_type = IPSEC_OUT; io->ipsec_out_len = sizeof (ipsec_out_t); io->ipsec_out_use_global_policy = B_TRUE; first_mp->b_cont = mp; mctl_present = B_TRUE; } if (attach_ill != NULL) { ASSERT(attach_ill == ipif->ipif_ill); match_flags = MATCH_IRE_ILL | MATCH_IRE_SECATTR; /* * Check if we need an ire that will not be * looked up by anybody else i.e. HIDDEN. */ if (ill_is_probeonly(attach_ill)) { match_flags |= MATCH_IRE_MARK_HIDDEN; } io->ipsec_out_ill_index = attach_ill->ill_phyint->phyint_ifindex; io->ipsec_out_attach_if = B_TRUE; } else { match_flags = MATCH_IRE_ILL_GROUP | MATCH_IRE_SECATTR; io->ipsec_out_ill_index = ipif->ipif_ill->ill_phyint->phyint_ifindex; } if (connp != NULL) { io->ipsec_out_multicast_loop = connp->conn_multicast_loop; io->ipsec_out_dontroute = connp->conn_dontroute; io->ipsec_out_zoneid = connp->conn_zoneid; } /* * If the application uses IP_MULTICAST_IF with * different logical addresses of the same ILL, we * need to make sure that the soruce address of * the packet matches the logical IP address used * in the option. We do it by initializing ipha_src * here. This should keep IPSEC also happy as * when we return from IPSEC processing, we don't * have to worry about getting the right address on * the packet. Thus it is sufficient to look for * IRE_CACHE using MATCH_IRE_ILL rathen than * MATCH_IRE_IPIF. * * NOTE : We need to do it for non-secure case also as * this might go out secure if there is a global policy * match in ip_wput_ire. For bind to IPIF_NOFAILOVER * address, the source should be initialized already and * hence we won't be initializing here. * * As we do not have the ire yet, it is possible that * we set the source address here and then later discover * that the ire implies the source address to be assigned * through the RTF_SETSRC flag. * In that case, the setsrc variable will remind us * that overwritting the source address by the one * of the RTF_SETSRC-flagged ire is allowed. */ if (ipha->ipha_src == INADDR_ANY && (connp == NULL || !connp->conn_unspec_src)) { ipha->ipha_src = ipif->ipif_src_addr; setsrc = RTF_SETSRC; } /* * Find an IRE which matches the destination and the outgoing * queue (i.e. the outgoing interface.) * For loopback use a unicast IP address for * the ire lookup. */ if (ipif->ipif_ill->ill_phyint->phyint_flags & PHYI_LOOPBACK) { dst = ipif->ipif_lcl_addr; } /* * If IP_XMIT_IF is set, we branch out to ip_newroute_ipif. * We don't need to lookup ire in ctable as the packet * needs to be sent to the destination through the specified * ill irrespective of ires in the cache table. */ ire = NULL; if (xmit_ill == NULL) { ire = ire_ctable_lookup(dst, 0, 0, ipif, zoneid, MBLK_GETLABEL(mp), match_flags); } /* * refrele attach_ill as its not needed anymore. */ if (attach_ill != NULL) { ill_refrele(attach_ill); attach_ill = NULL; } if (ire == NULL) { /* * Multicast loopback and multicast forwarding is * done in ip_wput_ire. * * Mark this packet to make it be delivered to * ip_wput_ire after the new ire has been * created. * * The call to ip_newroute_ipif takes into account * the setsrc reminder. In any case, we take care * of the RTF_MULTIRT flag. */ mp->b_prev = mp->b_next = NULL; if (xmit_ill == NULL || xmit_ill->ill_ipif_up_count > 0) { ip_newroute_ipif(q, first_mp, ipif, dst, connp, setsrc | RTF_MULTIRT, zoneid); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "noire"); } else { freemsg(first_mp); } ipif_refrele(ipif); if (xmit_ill != NULL) ill_refrele(xmit_ill); if (need_decref) CONN_DEC_REF(connp); return; } ipif_refrele(ipif); ipif = NULL; ASSERT(xmit_ill == NULL); /* * Honor the RTF_SETSRC flag for multicast packets, * if allowed by the setsrc reminder. */ if ((ire->ire_flags & RTF_SETSRC) && setsrc) { ipha->ipha_src = ire->ire_src_addr; } /* * Unconditionally force the TTL to 1 for * multirouted multicast packets: * multirouted multicast should not cross * multicast routers. */ if (ire->ire_flags & RTF_MULTIRT) { if (ipha->ipha_ttl > 1) { ip2dbg(("ip_wput: forcing multicast " "multirt TTL to 1 (was %d), dst 0x%08x\n", ipha->ipha_ttl, ntohl(ire->ire_addr))); ipha->ipha_ttl = 1; } } } else { ire = ire_cache_lookup(dst, zoneid, MBLK_GETLABEL(mp)); if ((ire != NULL) && (ire->ire_type & (IRE_BROADCAST | IRE_LOCAL | IRE_LOOPBACK))) { ignore_dontroute = B_TRUE; ignore_nexthop = B_TRUE; } if (ire != NULL) { ire_refrele(ire); ire = NULL; } /* * Guard against coming in from arp in which case conn is NULL. * Also guard against non M_DATA with dontroute set but * destined to local, loopback or broadcast addresses. */ if (connp != NULL && connp->conn_dontroute && !ignore_dontroute) { dontroute: /* * Set TTL to 1 if SO_DONTROUTE is set to prevent * routing protocols from seeing false direct * connectivity. */ ipha->ipha_ttl = 1; /* * If IP_XMIT_IF is also set (conn_xmit_if_ill != NULL) * along with SO_DONTROUTE, higher precedence is * given to IP_XMIT_IF and the IP_XMIT_IF ipif is used. */ if (connp->conn_xmit_if_ill == NULL) { /* If suitable ipif not found, drop packet */ dst_ipif = ipif_lookup_onlink_addr(dst, zoneid); if (dst_ipif == NULL) { ip1dbg(("ip_wput: no route for " "dst using SO_DONTROUTE\n")); BUMP_MIB(&ip_mib, ipOutNoRoutes); mp->b_prev = mp->b_next = NULL; if (first_mp == NULL) first_mp = mp; goto drop_pkt; } else { /* * If suitable ipif has been found, set * xmit_ill to the corresponding * ipif_ill because we'll be following * the IP_XMIT_IF logic. */ ASSERT(xmit_ill == NULL); xmit_ill = dst_ipif->ipif_ill; mutex_enter(&xmit_ill->ill_lock); if (!ILL_CAN_LOOKUP(xmit_ill)) { mutex_exit(&xmit_ill->ill_lock); xmit_ill = NULL; ipif_refrele(dst_ipif); ip1dbg(("ip_wput: no route for" " dst using" " SO_DONTROUTE\n")); BUMP_MIB(&ip_mib, ipOutNoRoutes); mp->b_prev = mp->b_next = NULL; if (first_mp == NULL) first_mp = mp; goto drop_pkt; } ill_refhold_locked(xmit_ill); mutex_exit(&xmit_ill->ill_lock); ipif_refrele(dst_ipif); } } } /* * If we are bound to IPIF_NOFAILOVER address, look for * an IRE_CACHE matching the ill. */ send_from_ill: if (attach_ill != NULL) { ipif_t *attach_ipif; match_flags = MATCH_IRE_ILL | MATCH_IRE_SECATTR; /* * Check if we need an ire that will not be * looked up by anybody else i.e. HIDDEN. */ if (ill_is_probeonly(attach_ill)) { match_flags |= MATCH_IRE_MARK_HIDDEN; } attach_ipif = ipif_get_next_ipif(NULL, attach_ill); if (attach_ipif == NULL) { ip1dbg(("ip_wput: No ipif for attach_ill\n")); goto drop_pkt; } ire = ire_ctable_lookup(dst, 0, 0, attach_ipif, zoneid, MBLK_GETLABEL(mp), match_flags); ipif_refrele(attach_ipif); } else if (xmit_ill != NULL || (connp != NULL && connp->conn_xmit_if_ill != NULL)) { /* * Mark this packet as originated locally */ mp->b_prev = mp->b_next = NULL; /* * xmit_ill could be NULL if SO_DONTROUTE * is also set. */ if (xmit_ill == NULL) { xmit_ill = conn_get_held_ill(connp, &connp->conn_xmit_if_ill, &err); if (err == ILL_LOOKUP_FAILED) { if (need_decref) CONN_DEC_REF(connp); freemsg(first_mp); return; } if (xmit_ill == NULL) { if (connp->conn_dontroute) goto dontroute; goto send_from_ill; } } /* * could be SO_DONTROUTE case also. * check at least one interface is UP as * spcified by this ILL, and then call * ip_newroute_ipif() */ if (xmit_ill->ill_ipif_up_count > 0) { ipif_t *ipif; ipif = ipif_get_next_ipif(NULL, xmit_ill); if (ipif != NULL) { ip_newroute_ipif(q, first_mp, ipif, dst, connp, 0, zoneid); ipif_refrele(ipif); ip1dbg(("ip_wput: ip_unicast_if\n")); } } else { freemsg(first_mp); } ill_refrele(xmit_ill); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "unicast_if"); if (need_decref) CONN_DEC_REF(connp); return; } else if (ip_nexthop || (connp != NULL && (connp->conn_nexthop_set)) && !ignore_nexthop) { if (!ip_nexthop) { ip_nexthop = B_TRUE; nexthop_addr = connp->conn_nexthop_v4; } match_flags = MATCH_IRE_MARK_PRIVATE_ADDR | MATCH_IRE_GW; ire = ire_ctable_lookup(dst, nexthop_addr, 0, NULL, zoneid, MBLK_GETLABEL(mp), match_flags); } else { ire = ire_cache_lookup(dst, zoneid, MBLK_GETLABEL(mp)); } if (!ire) { /* * Make sure we don't load spread if this * is IPIF_NOFAILOVER case. */ if ((attach_ill != NULL) || (ip_nexthop && !ignore_nexthop)) { if (mctl_present) { io = (ipsec_out_t *)first_mp->b_rptr; ASSERT(first_mp->b_datap->db_type == M_CTL); ASSERT(io->ipsec_out_type == IPSEC_OUT); } else { ASSERT(mp == first_mp); first_mp = allocb( sizeof (ipsec_info_t), BPRI_HI); if (first_mp == NULL) { first_mp = mp; goto drop_pkt; } first_mp->b_datap->db_type = M_CTL; first_mp->b_wptr += sizeof (ipsec_info_t); /* ipsec_out_secure is B_FALSE now */ bzero(first_mp->b_rptr, sizeof (ipsec_info_t)); io = (ipsec_out_t *)first_mp->b_rptr; io->ipsec_out_type = IPSEC_OUT; io->ipsec_out_len = sizeof (ipsec_out_t); io->ipsec_out_use_global_policy = B_TRUE; first_mp->b_cont = mp; mctl_present = B_TRUE; } if (attach_ill != NULL) { io->ipsec_out_ill_index = attach_ill-> ill_phyint->phyint_ifindex; io->ipsec_out_attach_if = B_TRUE; } else { io->ipsec_out_ip_nexthop = ip_nexthop; io->ipsec_out_nexthop_addr = nexthop_addr; } } noirefound: /* * Mark this packet as having originated on * this machine. This will be noted in * ire_add_then_send, which needs to know * whether to run it back through ip_wput or * ip_rput following successful resolution. */ mp->b_prev = NULL; mp->b_next = NULL; ip_newroute(q, first_mp, dst, NULL, connp, zoneid); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "newroute"); if (attach_ill != NULL) ill_refrele(attach_ill); if (xmit_ill != NULL) ill_refrele(xmit_ill); if (need_decref) CONN_DEC_REF(connp); return; } } /* We now know where we are going with it. */ TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "end"); /* * Check if the ire has the RTF_MULTIRT flag, inherited * from an IRE_OFFSUBNET ire entry in ip_newroute. */ if (ire->ire_flags & RTF_MULTIRT) { /* * Force the TTL of multirouted packets if required. * The TTL of such packets is bounded by the * ip_multirt_ttl ndd variable. */ if ((ip_multirt_ttl > 0) && (ipha->ipha_ttl > ip_multirt_ttl)) { ip2dbg(("ip_wput: forcing multirt TTL to %d " "(was %d), dst 0x%08x\n", ip_multirt_ttl, ipha->ipha_ttl, ntohl(ire->ire_addr))); ipha->ipha_ttl = ip_multirt_ttl; } /* * At this point, we check to see if there are any pending * unresolved routes. ire_multirt_resolvable() * checks in O(n) that all IRE_OFFSUBNET ire * entries for the packet's destination and * flagged RTF_MULTIRT are currently resolved. * If some remain unresolved, we make a copy * of the current message. It will be used * to initiate additional route resolutions. */ multirt_need_resolve = ire_multirt_need_resolve(ire->ire_addr, MBLK_GETLABEL(first_mp)); ip2dbg(("ip_wput[noirefound]: ire %p, " "multirt_need_resolve %d, first_mp %p\n", (void *)ire, multirt_need_resolve, (void *)first_mp)); if (multirt_need_resolve) { copy_mp = copymsg(first_mp); if (copy_mp != NULL) { MULTIRT_DEBUG_TAG(copy_mp); } } } ip_wput_ire(q, first_mp, ire, connp, caller, zoneid); /* * Try to resolve another multiroute if * ire_multirt_resolvable() deemed it necessary. * At this point, we need to distinguish * multicasts from other packets. For multicasts, * we call ip_newroute_ipif() and request that both * multirouting and setsrc flags are checked. */ if (copy_mp != NULL) { if (CLASSD(dst)) { ipif_t *ipif = ipif_lookup_group(dst, zoneid); if (ipif) { ip_newroute_ipif(q, copy_mp, ipif, dst, connp, RTF_SETSRC | RTF_MULTIRT, zoneid); ipif_refrele(ipif); } else { MULTIRT_DEBUG_UNTAG(copy_mp); freemsg(copy_mp); copy_mp = NULL; } } else { ip_newroute(q, copy_mp, dst, NULL, connp, zoneid); } } if (attach_ill != NULL) ill_refrele(attach_ill); if (xmit_ill != NULL) ill_refrele(xmit_ill); if (need_decref) CONN_DEC_REF(connp); return; icmp_parameter_problem: /* could not have originated externally */ ASSERT(mp->b_prev == NULL); if (ip_hdr_complete(ipha, zoneid) == 0) { BUMP_MIB(&ip_mib, ipOutNoRoutes); /* it's the IP header length that's in trouble */ icmp_param_problem(q, first_mp, 0, zoneid); first_mp = NULL; } drop_pkt: ip1dbg(("ip_wput: dropped packet\n")); if (ire != NULL) ire_refrele(ire); if (need_decref) CONN_DEC_REF(connp); freemsg(first_mp); if (attach_ill != NULL) ill_refrele(attach_ill); if (xmit_ill != NULL) ill_refrele(xmit_ill); TRACE_2(TR_FAC_IP, TR_IP_WPUT_END, "ip_wput_end: q %p (%S)", q, "droppkt"); } /* * If this is a conn_t queue, then we pass in the conn. This includes the * zoneid. * Otherwise, this is a message coming back from ARP or for an ill_t queue, * in which case we use the global zoneid since those are all part of * the global zone. */ void ip_wput(queue_t *q, mblk_t *mp) { if (CONN_Q(q)) ip_output(Q_TO_CONN(q), mp, q, IP_WPUT); else ip_output(GLOBAL_ZONEID, mp, q, IP_WPUT); } /* * * The following rules must be observed when accessing any ipif or ill * that has been cached in the conn. Typically conn_nofailover_ill, * conn_xmit_if_ill, conn_multicast_ipif and conn_multicast_ill. * * Access: The ipif or ill pointed to from the conn can be accessed under * the protection of the conn_lock or after it has been refheld under the * protection of the conn lock. In addition the IPIF_CAN_LOOKUP or * ILL_CAN_LOOKUP macros must be used before actually doing the refhold. * The reason for this is that a concurrent unplumb could actually be * cleaning up these cached pointers by walking the conns and might have * finished cleaning up the conn in question. The macros check that an * unplumb has not yet started on the ipif or ill. * * Caching: An ipif or ill pointer may be cached in the conn only after * making sure that an unplumb has not started. So the caching is done * while holding both the conn_lock and the ill_lock and after using the * ILL_CAN_LOOKUP/IPIF_CAN_LOOKUP macro. An unplumb will set the ILL_CONDEMNED * flag before starting the cleanup of conns. * * The list of ipifs hanging off the ill is protected by ill_g_lock and ill_lock * On the other hand to access ipif->ipif_ill, we need one of either ill_g_lock * or a reference to the ipif or a reference to an ire that references the * ipif. An ipif does not change its ill except for failover/failback. Since * failover/failback happens only after bringing down the ipif and making sure * the ipif refcnt has gone to zero and holding the ill_g_lock and ill_lock * the above holds. */ ipif_t * conn_get_held_ipif(conn_t *connp, ipif_t **ipifp, int *err) { ipif_t *ipif; ill_t *ill; *err = 0; rw_enter(&ill_g_lock, RW_READER); mutex_enter(&connp->conn_lock); ipif = *ipifp; if (ipif != NULL) { ill = ipif->ipif_ill; mutex_enter(&ill->ill_lock); if (IPIF_CAN_LOOKUP(ipif)) { ipif_refhold_locked(ipif); mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); rw_exit(&ill_g_lock); return (ipif); } else { *err = IPIF_LOOKUP_FAILED; } mutex_exit(&ill->ill_lock); } mutex_exit(&connp->conn_lock); rw_exit(&ill_g_lock); return (NULL); } ill_t * conn_get_held_ill(conn_t *connp, ill_t **illp, int *err) { ill_t *ill; *err = 0; mutex_enter(&connp->conn_lock); ill = *illp; if (ill != NULL) { mutex_enter(&ill->ill_lock); if (ILL_CAN_LOOKUP(ill)) { ill_refhold_locked(ill); mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); return (ill); } else { *err = ILL_LOOKUP_FAILED; } mutex_exit(&ill->ill_lock); } mutex_exit(&connp->conn_lock); return (NULL); } static int conn_set_held_ipif(conn_t *connp, ipif_t **ipifp, ipif_t *ipif) { ill_t *ill; ill = ipif->ipif_ill; mutex_enter(&connp->conn_lock); mutex_enter(&ill->ill_lock); if (IPIF_CAN_LOOKUP(ipif)) { *ipifp = ipif; mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); return (0); } mutex_exit(&ill->ill_lock); mutex_exit(&connp->conn_lock); return (IPIF_LOOKUP_FAILED); } /* * This is called if the outbound datagram needs fragmentation. * * NOTE : This function does not ire_refrele the ire argument passed in. */ static void ip_wput_ire_fragmentit(mblk_t *ipsec_mp, ire_t *ire, zoneid_t zoneid) { ipha_t *ipha; mblk_t *mp; uint32_t v_hlen_tos_len; uint32_t max_frag; uint32_t frag_flag; boolean_t dont_use; if (ipsec_mp->b_datap->db_type == M_CTL) { mp = ipsec_mp->b_cont; } else { mp = ipsec_mp; } ipha = (ipha_t *)mp->b_rptr; v_hlen_tos_len = ((uint32_t *)ipha)[0]; #ifdef _BIG_ENDIAN #define V_HLEN (v_hlen_tos_len >> 24) #define LENGTH (v_hlen_tos_len & 0xFFFF) #else #define V_HLEN (v_hlen_tos_len & 0xFF) #define LENGTH ((v_hlen_tos_len >> 24) | ((v_hlen_tos_len >> 8) & 0xFF00)) #endif #ifndef SPEED_BEFORE_SAFETY /* * Check that ipha_length is consistent with * the mblk length */ if (LENGTH != (mp->b_cont ? msgdsize(mp) : mp->b_wptr - rptr)) { ip0dbg(("Packet length mismatch: %d, %ld\n", LENGTH, msgdsize(mp))); freemsg(ipsec_mp); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_fragmentit: mp %p (%S)", mp, "packet length mismatch"); return; } #endif /* * Don't use frag_flag if pre-built packet or source * routed or if multicast (since multicast packets do not solicit * ICMP "packet too big" messages). Get the values of * max_frag and frag_flag atomically by acquiring the * ire_lock. */ mutex_enter(&ire->ire_lock); max_frag = ire->ire_max_frag; frag_flag = ire->ire_frag_flag; mutex_exit(&ire->ire_lock); dont_use = ((ipha->ipha_ident == IP_HDR_INCLUDED) || (V_HLEN != IP_SIMPLE_HDR_VERSION && ip_source_route_included(ipha)) || CLASSD(ipha->ipha_dst)); ip_wput_frag(ire, ipsec_mp, OB_PKT, max_frag, (dont_use ? 0 : frag_flag), zoneid); } /* * Used for deciding the MSS size for the upper layer. Thus * we need to check the outbound policy values in the conn. */ int conn_ipsec_length(conn_t *connp) { ipsec_latch_t *ipl; ipl = connp->conn_latch; if (ipl == NULL) return (0); if (ipl->ipl_out_policy == NULL) return (0); return (ipl->ipl_out_policy->ipsp_act->ipa_ovhd); } /* * Returns an estimate of the IPSEC headers size. This is used if * we don't want to call into IPSEC to get the exact size. */ int ipsec_out_extra_length(mblk_t *ipsec_mp) { ipsec_out_t *io = (ipsec_out_t *)ipsec_mp->b_rptr; ipsec_action_t *a; ASSERT(io->ipsec_out_type == IPSEC_OUT); if (!io->ipsec_out_secure) return (0); a = io->ipsec_out_act; if (a == NULL) { ASSERT(io->ipsec_out_policy != NULL); a = io->ipsec_out_policy->ipsp_act; } ASSERT(a != NULL); return (a->ipa_ovhd); } /* * Returns an estimate of the IPSEC headers size. This is used if * we don't want to call into IPSEC to get the exact size. */ int ipsec_in_extra_length(mblk_t *ipsec_mp) { ipsec_in_t *ii = (ipsec_in_t *)ipsec_mp->b_rptr; ipsec_action_t *a; ASSERT(ii->ipsec_in_type == IPSEC_IN); a = ii->ipsec_in_action; return (a == NULL ? 0 : a->ipa_ovhd); } /* * If there are any source route options, return the true final * destination. Otherwise, return the destination. */ ipaddr_t ip_get_dst(ipha_t *ipha) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; uint32_t off; dst = ipha->ipha_dst; if (IS_SIMPLE_IPH(ipha)) return (dst); for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0); switch (optval) { case IPOPT_SSRR: case IPOPT_LSRR: off = opt[IPOPT_OFFSET]; /* * If one of the conditions is true, it means * end of options and dst already has the right * value. */ if (!(optlen < IP_ADDR_LEN || off > optlen - 3)) { off = optlen - IP_ADDR_LEN; bcopy(&opt[off], &dst, IP_ADDR_LEN); } return (dst); default: break; } } return (dst); } mblk_t * ip_wput_ire_parse_ipsec_out(mblk_t *mp, ipha_t *ipha, ip6_t *ip6h, ire_t *ire, conn_t *connp, boolean_t unspec_src, zoneid_t zoneid) { ipsec_out_t *io; mblk_t *first_mp; boolean_t policy_present; first_mp = mp; if (mp->b_datap->db_type == M_CTL) { io = (ipsec_out_t *)first_mp->b_rptr; /* * ip_wput[_v6] attaches an IPSEC_OUT in two cases. * * 1) There is per-socket policy (including cached global * policy) or a policy on the IP-in-IP tunnel. * 2) There is no per-socket policy, but it is * a multicast packet that needs to go out * on a specific interface. This is the case * where (ip_wput and ip_wput_multicast) attaches * an IPSEC_OUT and sets ipsec_out_secure B_FALSE. * * In case (2) we check with global policy to * see if there is a match and set the ill_index * appropriately so that we can lookup the ire * properly in ip_wput_ipsec_out. */ /* * ipsec_out_use_global_policy is set to B_FALSE * in ipsec_in_to_out(). Refer to that function for * details. */ if ((io->ipsec_out_latch == NULL) && (io->ipsec_out_use_global_policy)) { return (ip_wput_attach_policy(first_mp, ipha, ip6h, ire, connp, unspec_src, zoneid)); } if (!io->ipsec_out_secure) { /* * If this is not a secure packet, drop * the IPSEC_OUT mp and treat it as a clear * packet. This happens when we are sending * a ICMP reply back to a clear packet. See * ipsec_in_to_out() for details. */ mp = first_mp->b_cont; freeb(first_mp); } return (mp); } /* * See whether we need to attach a global policy here. We * don't depend on the conn (as it could be null) for deciding * what policy this datagram should go through because it * should have happened in ip_wput if there was some * policy. This normally happens for connections which are not * fully bound preventing us from caching policies in * ip_bind. Packets coming from the TCP listener/global queue * - which are non-hard_bound - could also be affected by * applying policy here. * * If this packet is coming from tcp global queue or listener, * we will be applying policy here. This may not be *right* * if these packets are coming from the detached connection as * it could have gone in clear before. This happens only if a * TCP connection started when there is no policy and somebody * added policy before it became detached. Thus packets of the * detached connection could go out secure and the other end * would drop it because it will be expecting in clear. The * converse is not true i.e if somebody starts a TCP * connection and deletes the policy, all the packets will * still go out with the policy that existed before deleting * because ip_unbind sends up policy information which is used * by TCP on subsequent ip_wputs. The right solution is to fix * TCP to attach a dummy IPSEC_OUT and set * ipsec_out_use_global_policy to B_FALSE. As this might * affect performance for normal cases, we are not doing it. * Thus, set policy before starting any TCP connections. * * NOTE - We might apply policy even for a hard bound connection * - for which we cached policy in ip_bind - if somebody added * global policy after we inherited the policy in ip_bind. * This means that the packets that were going out in clear * previously would start going secure and hence get dropped * on the other side. To fix this, TCP attaches a dummy * ipsec_out and make sure that we don't apply global policy. */ if (ipha != NULL) policy_present = ipsec_outbound_v4_policy_present; else policy_present = ipsec_outbound_v6_policy_present; if (!policy_present) return (mp); return (ip_wput_attach_policy(mp, ipha, ip6h, ire, connp, unspec_src, zoneid)); } ire_t * conn_set_outgoing_ill(conn_t *connp, ire_t *ire, ill_t **conn_outgoing_ill) { ipaddr_t addr; ire_t *save_ire; irb_t *irb; ill_group_t *illgrp; int err; save_ire = ire; addr = ire->ire_addr; ASSERT(ire->ire_type == IRE_BROADCAST); illgrp = connp->conn_outgoing_ill->ill_group; if (illgrp == NULL) { *conn_outgoing_ill = conn_get_held_ill(connp, &connp->conn_outgoing_ill, &err); if (err == ILL_LOOKUP_FAILED) { ire_refrele(save_ire); return (NULL); } return (save_ire); } /* * If IP_BOUND_IF has been done, conn_outgoing_ill will be set. * If it is part of the group, we need to send on the ire * that has been cleared of IRE_MARK_NORECV and that belongs * to this group. This is okay as IP_BOUND_IF really means * any ill in the group. We depend on the fact that the * first ire in the group is always cleared of IRE_MARK_NORECV * if such an ire exists. This is possible only if you have * at least one ill in the group that has not failed. * * First get to the ire that matches the address and group. * * We don't look for an ire with a matching zoneid because a given zone * won't always have broadcast ires on all ills in the group. */ irb = ire->ire_bucket; rw_enter(&irb->irb_lock, RW_READER); if (ire->ire_marks & IRE_MARK_NORECV) { /* * If the current zone only has an ire broadcast for this * address marked NORECV, the ire we want is ahead in the * bucket, so we look it up deliberately ignoring the zoneid. */ for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { if (ire->ire_addr != addr) continue; /* skip over deleted ires */ if (ire->ire_marks & IRE_MARK_CONDEMNED) continue; } } while (ire != NULL) { /* * If a new interface is coming up, we could end up * seeing the loopback ire and the non-loopback ire * may not have been added yet. So check for ire_stq */ if (ire->ire_stq != NULL && (ire->ire_addr != addr || ire->ire_ipif->ipif_ill->ill_group == illgrp)) { break; } ire = ire->ire_next; } if (ire != NULL && ire->ire_addr == addr && ire->ire_ipif->ipif_ill->ill_group == illgrp) { IRE_REFHOLD(ire); rw_exit(&irb->irb_lock); ire_refrele(save_ire); *conn_outgoing_ill = ire_to_ill(ire); /* * Refhold the ill to make the conn_outgoing_ill * independent of the ire. ip_wput_ire goes in a loop * and may refrele the ire. Since we have an ire at this * point we don't need to use ILL_CAN_LOOKUP on the ill. */ ill_refhold(*conn_outgoing_ill); return (ire); } rw_exit(&irb->irb_lock); ip1dbg(("conn_set_outgoing_ill: No matching ire\n")); /* * If we can't find a suitable ire, return the original ire. */ return (save_ire); } /* * This function does the ire_refrele of the ire passed in as the * argument. As this function looks up more ires i.e broadcast ires, * it needs to REFRELE them. Currently, for simplicity we don't * differentiate the one passed in and looked up here. We always * REFRELE. * IPQoS Notes: * IP policy is invoked if IPP_LOCAL_OUT is enabled. Processing for * IPSec packets are done in ipsec_out_process. * */ void ip_wput_ire(queue_t *q, mblk_t *mp, ire_t *ire, conn_t *connp, int caller, zoneid_t zoneid) { ipha_t *ipha; #define rptr ((uchar_t *)ipha) queue_t *stq; #define Q_TO_INDEX(stq) (((ill_t *)stq->q_ptr)->ill_phyint->phyint_ifindex) uint32_t v_hlen_tos_len; uint32_t ttl_protocol; ipaddr_t src; ipaddr_t dst; uint32_t cksum; ipaddr_t orig_src; ire_t *ire1; mblk_t *next_mp; uint_t hlen; uint16_t *up; uint32_t max_frag = ire->ire_max_frag; ill_t *ill = ire_to_ill(ire); int clusterwide; uint16_t ip_hdr_included; /* IP header included by ULP? */ int ipsec_len; mblk_t *first_mp; ipsec_out_t *io; boolean_t conn_dontroute; /* conn value for multicast */ boolean_t conn_multicast_loop; /* conn value for multicast */ boolean_t multicast_forward; /* Should we forward ? */ boolean_t unspec_src; ill_t *conn_outgoing_ill = NULL; ill_t *ire_ill; ill_t *ire1_ill; ill_t *out_ill; uint32_t ill_index = 0; boolean_t multirt_send = B_FALSE; int err; ipxmit_state_t pktxmit_state; TRACE_1(TR_FAC_IP, TR_IP_WPUT_IRE_START, "ip_wput_ire_start: q %p", q); multicast_forward = B_FALSE; unspec_src = (connp != NULL && connp->conn_unspec_src); if (ire->ire_flags & RTF_MULTIRT) { /* * Multirouting case. The bucket where ire is stored * probably holds other RTF_MULTIRT flagged ire * to the destination. In this call to ip_wput_ire, * we attempt to send the packet through all * those ires. Thus, we first ensure that ire is the * first RTF_MULTIRT ire in the bucket, * before walking the ire list. */ ire_t *first_ire; irb_t *irb = ire->ire_bucket; ASSERT(irb != NULL); /* Make sure we do not omit any multiroute ire. */ IRB_REFHOLD(irb); for (first_ire = irb->irb_ire; first_ire != NULL; first_ire = first_ire->ire_next) { if ((first_ire->ire_flags & RTF_MULTIRT) && (first_ire->ire_addr == ire->ire_addr) && !(first_ire->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN))) break; } if ((first_ire != NULL) && (first_ire != ire)) { IRE_REFHOLD(first_ire); ire_refrele(ire); ire = first_ire; ill = ire_to_ill(ire); } IRB_REFRELE(irb); } /* * conn_outgoing_ill is used only in the broadcast loop. * for performance we don't grab the mutexs in the fastpath */ if ((connp != NULL) && (connp->conn_xmit_if_ill == NULL) && (ire->ire_type == IRE_BROADCAST) && ((connp->conn_nofailover_ill != NULL) || (connp->conn_outgoing_ill != NULL))) { /* * Bind to IPIF_NOFAILOVER address overrides IP_BOUND_IF * option. So, see if this endpoint is bound to a * IPIF_NOFAILOVER address. If so, honor it. This implies * that if the interface is failed, we will still send * the packet on the same ill which is what we want. */ conn_outgoing_ill = conn_get_held_ill(connp, &connp->conn_nofailover_ill, &err); if (err == ILL_LOOKUP_FAILED) { ire_refrele(ire); freemsg(mp); return; } if (conn_outgoing_ill == NULL) { /* * Choose a good ill in the group to send the * packets on. */ ire = conn_set_outgoing_ill(connp, ire, &conn_outgoing_ill); if (ire == NULL) { freemsg(mp); return; } } } if (mp->b_datap->db_type != M_CTL) { ipha = (ipha_t *)mp->b_rptr; } else { io = (ipsec_out_t *)mp->b_rptr; ASSERT(io->ipsec_out_type == IPSEC_OUT); ASSERT(zoneid == io->ipsec_out_zoneid); ASSERT(zoneid != ALL_ZONES); ipha = (ipha_t *)mp->b_cont->b_rptr; dst = ipha->ipha_dst; /* * For the multicast case, ipsec_out carries conn_dontroute and * conn_multicast_loop as conn may not be available here. We * need this for multicast loopback and forwarding which is done * later in the code. */ if (CLASSD(dst)) { conn_dontroute = io->ipsec_out_dontroute; conn_multicast_loop = io->ipsec_out_multicast_loop; /* * If conn_dontroute is not set or conn_multicast_loop * is set, we need to do forwarding/loopback. For * datagrams from ip_wput_multicast, conn_dontroute is * set to B_TRUE and conn_multicast_loop is set to * B_FALSE so that we neither do forwarding nor * loopback. */ if (!conn_dontroute || conn_multicast_loop) multicast_forward = B_TRUE; } } if (ire->ire_type == IRE_LOCAL && ire->ire_zoneid != zoneid && ire->ire_zoneid != ALL_ZONES) { /* * When a zone sends a packet to another zone, we try to deliver * the packet under the same conditions as if the destination * was a real node on the network. To do so, we look for a * matching route in the forwarding table. * RTF_REJECT and RTF_BLACKHOLE are handled just like * ip_newroute() does. * Note that IRE_LOCAL are special, since they are used * when the zoneid doesn't match in some cases. This means that * we need to handle ipha_src differently since ire_src_addr * belongs to the receiving zone instead of the sending zone. * When ip_restrict_interzone_loopback is set, then * ire_cache_lookup() ensures that IRE_LOCAL are only used * for loopback between zones when the logical "Ethernet" would * have looped them back. */ ire_t *src_ire; src_ire = ire_ftable_lookup(ipha->ipha_dst, 0, 0, 0, NULL, NULL, zoneid, 0, NULL, (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | MATCH_IRE_RJ_BHOLE)); if (src_ire != NULL && !(src_ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) && (!ip_restrict_interzone_loopback || ire_local_same_ill_group(ire, src_ire))) { if (ipha->ipha_src == INADDR_ANY && !unspec_src) ipha->ipha_src = src_ire->ire_src_addr; ire_refrele(src_ire); } else { ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); BUMP_MIB(&ip_mib, ipOutNoRoutes); if (src_ire != NULL) { if (src_ire->ire_flags & RTF_BLACKHOLE) { ire_refrele(src_ire); freemsg(mp); return; } ire_refrele(src_ire); } if (ip_hdr_complete(ipha, zoneid)) { /* Failed */ freemsg(mp); return; } icmp_unreachable(q, mp, ICMP_HOST_UNREACHABLE, zoneid); return; } } if (mp->b_datap->db_type == M_CTL || ipsec_outbound_v4_policy_present) { mp = ip_wput_ire_parse_ipsec_out(mp, ipha, NULL, ire, connp, unspec_src, zoneid); if (mp == NULL) { ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } } first_mp = mp; ipsec_len = 0; if (first_mp->b_datap->db_type == M_CTL) { io = (ipsec_out_t *)first_mp->b_rptr; ASSERT(io->ipsec_out_type == IPSEC_OUT); mp = first_mp->b_cont; ipsec_len = ipsec_out_extra_length(first_mp); ASSERT(ipsec_len >= 0); /* We already picked up the zoneid from the M_CTL above */ ASSERT(zoneid == io->ipsec_out_zoneid); ASSERT(zoneid != ALL_ZONES); /* * Drop M_CTL here if IPsec processing is not needed. * (Non-IPsec use of M_CTL extracted any information it * needed above). */ if (ipsec_len == 0) { freeb(first_mp); first_mp = mp; } } /* * Fast path for ip_wput_ire */ ipha = (ipha_t *)mp->b_rptr; v_hlen_tos_len = ((uint32_t *)ipha)[0]; dst = ipha->ipha_dst; /* * ICMP(RAWIP) module should set the ipha_ident to IP_HDR_INCLUDED * if the socket is a SOCK_RAW type. The transport checksum should * be provided in the pre-built packet, so we don't need to compute it. * Also, other application set flags, like DF, should not be altered. * Other transport MUST pass down zero. */ ip_hdr_included = ipha->ipha_ident; ASSERT(ipha->ipha_ident == 0 || ipha->ipha_ident == IP_HDR_INCLUDED); if (CLASSD(dst)) { ip1dbg(("ip_wput_ire: to 0x%x ire %s addr 0x%x\n", ntohl(dst), ip_nv_lookup(ire_nv_tbl, ire->ire_type), ntohl(ire->ire_addr))); } /* Macros to extract header fields from data already in registers */ #ifdef _BIG_ENDIAN #define V_HLEN (v_hlen_tos_len >> 24) #define LENGTH (v_hlen_tos_len & 0xFFFF) #define PROTO (ttl_protocol & 0xFF) #else #define V_HLEN (v_hlen_tos_len & 0xFF) #define LENGTH ((v_hlen_tos_len >> 24) | ((v_hlen_tos_len >> 8) & 0xFF00)) #define PROTO (ttl_protocol >> 8) #endif orig_src = src = ipha->ipha_src; /* (The loop back to "another" is explained down below.) */ another:; /* * Assign an ident value for this packet. We assign idents on * a per destination basis out of the IRE. There could be * other threads targeting the same destination, so we have to * arrange for a atomic increment. Note that we use a 32-bit * atomic add because it has better performance than its * 16-bit sibling. * * If running in cluster mode and if the source address * belongs to a replicated service then vector through * cl_inet_ipident vector to allocate ip identifier * NOTE: This is a contract private interface with the * clustering group. */ clusterwide = 0; if (cl_inet_ipident) { ASSERT(cl_inet_isclusterwide); if ((*cl_inet_isclusterwide)(IPPROTO_IP, AF_INET, (uint8_t *)(uintptr_t)src)) { ipha->ipha_ident = (*cl_inet_ipident)(IPPROTO_IP, AF_INET, (uint8_t *)(uintptr_t)src, (uint8_t *)(uintptr_t)dst); clusterwide = 1; } } if (!clusterwide) { ipha->ipha_ident = (uint16_t)atomic_add_32_nv(&ire->ire_ident, 1); } #ifndef _BIG_ENDIAN ipha->ipha_ident = (ipha->ipha_ident << 8) | (ipha->ipha_ident >> 8); #endif /* * Set source address unless sent on an ill or conn_unspec_src is set. * This is needed to obey conn_unspec_src when packets go through * ip_newroute + arp. * Assumes ip_newroute{,_multi} sets the source address as well. */ if (src == INADDR_ANY && !unspec_src) { /* * Assign the appropriate source address from the IRE if none * was specified. */ ASSERT(ire->ire_ipversion == IPV4_VERSION); /* * With IP multipathing, broadcast packets are sent on the ire * that has been cleared of IRE_MARK_NORECV and that belongs to * the group. However, this ire might not be in the same zone so * we can't always use its source address. We look for a * broadcast ire in the same group and in the right zone. */ if (ire->ire_type == IRE_BROADCAST && ire->ire_zoneid != zoneid) { ire_t *src_ire = ire_ctable_lookup(dst, 0, IRE_BROADCAST, ire->ire_ipif, zoneid, NULL, (MATCH_IRE_TYPE | MATCH_IRE_ILL_GROUP)); if (src_ire != NULL) { src = src_ire->ire_src_addr; ire_refrele(src_ire); } else { ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); freemsg(first_mp); BUMP_MIB(&ip_mib, ipOutDiscards); return; } } else { src = ire->ire_src_addr; } if (connp == NULL) { ip1dbg(("ip_wput_ire: no connp and no src " "address for dst 0x%x, using src 0x%x\n", ntohl(dst), ntohl(src))); } ipha->ipha_src = src; } stq = ire->ire_stq; /* * We only allow ire chains for broadcasts since there will * be multiple IRE_CACHE entries for the same multicast * address (one per ipif). */ next_mp = NULL; /* broadcast packet */ if (ire->ire_type == IRE_BROADCAST) goto broadcast; /* loopback ? */ if (stq == NULL) goto nullstq; /* The ill_index for outbound ILL */ ill_index = Q_TO_INDEX(stq); BUMP_MIB(&ip_mib, ipOutRequests); ttl_protocol = ((uint16_t *)ipha)[4]; /* pseudo checksum (do it in parts for IP header checksum) */ cksum = (dst >> 16) + (dst & 0xFFFF) + (src >> 16) + (src & 0xFFFF); if (!IP_FLOW_CONTROLLED_ULP(PROTO)) { queue_t *dev_q = stq->q_next; /* flow controlled */ if ((dev_q->q_next || dev_q->q_first) && !canput(dev_q)) goto blocked; if ((PROTO == IPPROTO_UDP) && (ip_hdr_included != IP_HDR_INCLUDED)) { hlen = (V_HLEN & 0xF) << 2; up = IPH_UDPH_CHECKSUMP(ipha, hlen); if (*up != 0) { IP_CKSUM_XMIT(ill, ire, mp, ipha, up, PROTO, hlen, LENGTH, max_frag, ipsec_len, cksum); /* Software checksum? */ if (DB_CKSUMFLAGS(mp) == 0) { IP_STAT(ip_out_sw_cksum); IP_STAT_UPDATE( ip_udp_out_sw_cksum_bytes, LENGTH - hlen); } } } } else if (ip_hdr_included != IP_HDR_INCLUDED) { hlen = (V_HLEN & 0xF) << 2; if (PROTO == IPPROTO_TCP) { up = IPH_TCPH_CHECKSUMP(ipha, hlen); /* * The packet header is processed once and for all, even * in the multirouting case. We disable hardware * checksum if the packet is multirouted, as it will be * replicated via several interfaces, and not all of * them may have this capability. */ IP_CKSUM_XMIT(ill, ire, mp, ipha, up, PROTO, hlen, LENGTH, max_frag, ipsec_len, cksum); /* Software checksum? */ if (DB_CKSUMFLAGS(mp) == 0) { IP_STAT(ip_out_sw_cksum); IP_STAT_UPDATE(ip_tcp_out_sw_cksum_bytes, LENGTH - hlen); } } else { sctp_hdr_t *sctph; ASSERT(PROTO == IPPROTO_SCTP); ASSERT(MBLKL(mp) >= (hlen + sizeof (*sctph))); sctph = (sctp_hdr_t *)(mp->b_rptr + hlen); /* * Zero out the checksum field to ensure proper * checksum calculation. */ sctph->sh_chksum = 0; #ifdef DEBUG if (!skip_sctp_cksum) #endif sctph->sh_chksum = sctp_cksum(mp, hlen); } } /* * If this is a multicast packet and originated from ip_wput * we need to do loopback and forwarding checks. If it comes * from ip_wput_multicast, we SHOULD not do this. */ if (CLASSD(ipha->ipha_dst) && multicast_forward) goto multi_loopback; /* checksum */ cksum += ttl_protocol; /* fragment the packet */ if (max_frag < (uint_t)(LENGTH + ipsec_len)) goto fragmentit; /* * Don't use frag_flag if packet is pre-built or source * routed or if multicast (since multicast packets do * not solicit ICMP "packet too big" messages). */ if ((ip_hdr_included != IP_HDR_INCLUDED) && (V_HLEN == IP_SIMPLE_HDR_VERSION || !ip_source_route_included(ipha)) && !CLASSD(ipha->ipha_dst)) ipha->ipha_fragment_offset_and_flags |= htons(ire->ire_frag_flag); if (!(DB_CKSUMFLAGS(mp) & HCK_IPV4_HDRCKSUM)) { /* calculate IP header checksum */ cksum += ipha->ipha_ident; cksum += (v_hlen_tos_len >> 16)+(v_hlen_tos_len & 0xFFFF); cksum += ipha->ipha_fragment_offset_and_flags; /* IP options present */ hlen = (V_HLEN & 0xF) - IP_SIMPLE_HDR_LENGTH_IN_WORDS; if (hlen) goto checksumoptions; /* calculate hdr checksum */ cksum = ((cksum & 0xFFFF) + (cksum >> 16)); cksum = ~(cksum + (cksum >> 16)); ipha->ipha_hdr_checksum = (uint16_t)cksum; } if (ipsec_len != 0) { /* * We will do the rest of the processing after * we come back from IPSEC in ip_wput_ipsec_out(). */ ASSERT(MBLKL(first_mp) >= sizeof (ipsec_out_t)); io = (ipsec_out_t *)first_mp->b_rptr; io->ipsec_out_ill_index = ((ill_t *)stq->q_ptr)-> ill_phyint->phyint_ifindex; ipsec_out_process(q, first_mp, ire, ill_index); ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } /* * In most cases, the emission loop below is entered only * once. Only in the case where the ire holds the * RTF_MULTIRT flag, do we loop to process all RTF_MULTIRT * flagged ires in the bucket, and send the packet * through all crossed RTF_MULTIRT routes. */ if (ire->ire_flags & RTF_MULTIRT) { multirt_send = B_TRUE; } do { if (multirt_send) { irb_t *irb; /* * We are in a multiple send case, need to get * the next ire and make a duplicate of the packet. * ire1 holds here the next ire to process in the * bucket. If multirouting is expected, * any non-RTF_MULTIRT ire that has the * right destination address is ignored. */ irb = ire->ire_bucket; ASSERT(irb != NULL); IRB_REFHOLD(irb); for (ire1 = ire->ire_next; ire1 != NULL; ire1 = ire1->ire_next) { if ((ire1->ire_flags & RTF_MULTIRT) == 0) continue; if (ire1->ire_addr != ire->ire_addr) continue; if (ire1->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN)) continue; /* Got one */ IRE_REFHOLD(ire1); break; } IRB_REFRELE(irb); if (ire1 != NULL) { next_mp = copyb(mp); if ((next_mp == NULL) || ((mp->b_cont != NULL) && ((next_mp->b_cont = dupmsg(mp->b_cont)) == NULL))) { freemsg(next_mp); next_mp = NULL; ire_refrele(ire1); ire1 = NULL; } } /* Last multiroute ire; don't loop anymore. */ if (ire1 == NULL) { multirt_send = B_FALSE; } } DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, ire->ire_ipif->ipif_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, ire->ire_ipif->ipif_ill, ipha, mp, mp); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp == NULL) goto release_ire_and_ill; mp->b_prev = SET_BPREV_FLAG(IPP_LOCAL_OUT); DTRACE_PROBE2(ip__xmit__1, mblk_t *, mp, ire_t *, ire); pktxmit_state = ip_xmit_v4(mp, ire, NULL, B_TRUE); if ((pktxmit_state == SEND_FAILED) || (pktxmit_state == LLHDR_RESLV_FAILED)) { ip2dbg(("ip_wput_ire: ip_xmit_v4 failed" "- packet dropped\n")); release_ire_and_ill: ire_refrele(ire); if (next_mp != NULL) { freemsg(next_mp); ire_refrele(ire1); } if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "last copy out"); IRE_REFRELE(ire); if (multirt_send) { ASSERT(ire1); /* * Proceed with the next RTF_MULTIRT ire, * Also set up the send-to queue accordingly. */ ire = ire1; ire1 = NULL; stq = ire->ire_stq; mp = next_mp; next_mp = NULL; ipha = (ipha_t *)mp->b_rptr; ill_index = Q_TO_INDEX(stq); } } while (multirt_send); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; /* * ire->ire_type == IRE_BROADCAST (minimize diffs) */ broadcast: { /* * Avoid broadcast storms by setting the ttl to 1 * for broadcasts. This parameter can be set * via ndd, so make sure that for the SO_DONTROUTE * case that ipha_ttl is always set to 1. * In the event that we are replying to incoming * ICMP packets, conn could be NULL. */ if ((connp != NULL) && connp->conn_dontroute) ipha->ipha_ttl = 1; else ipha->ipha_ttl = ip_broadcast_ttl; /* * Note that we are not doing a IRB_REFHOLD here. * Actually we don't care if the list changes i.e * if somebody deletes an IRE from the list while * we drop the lock, the next time we come around * ire_next will be NULL and hence we won't send * out multiple copies which is fine. */ rw_enter(&ire->ire_bucket->irb_lock, RW_READER); ire1 = ire->ire_next; if (conn_outgoing_ill != NULL) { while (ire->ire_ipif->ipif_ill != conn_outgoing_ill) { ASSERT(ire1 == ire->ire_next); if (ire1 != NULL && ire1->ire_addr == dst) { ire_refrele(ire); ire = ire1; IRE_REFHOLD(ire); ire1 = ire->ire_next; continue; } rw_exit(&ire->ire_bucket->irb_lock); /* Did not find a matching ill */ ip1dbg(("ip_wput_ire: broadcast with no " "matching IP_BOUND_IF ill %s\n", conn_outgoing_ill->ill_name)); freemsg(first_mp); if (ire != NULL) ire_refrele(ire); ill_refrele(conn_outgoing_ill); return; } } else if (ire1 != NULL && ire1->ire_addr == dst) { /* * If the next IRE has the same address and is not one * of the two copies that we need to send, try to see * whether this copy should be sent at all. This * assumes that we insert loopbacks first and then * non-loopbacks. This is acheived by inserting the * loopback always before non-loopback. * This is used to send a single copy of a broadcast * packet out all physical interfaces that have an * matching IRE_BROADCAST while also looping * back one copy (to ip_wput_local) for each * matching physical interface. However, we avoid * sending packets out different logical that match by * having ipif_up/ipif_down supress duplicate * IRE_BROADCASTS. * * This feature is currently used to get broadcasts * sent to multiple interfaces, when the broadcast * address being used applies to multiple interfaces. * For example, a whole net broadcast will be * replicated on every connected subnet of * the target net. * * Each zone has its own set of IRE_BROADCASTs, so that * we're able to distribute inbound packets to multiple * zones who share a broadcast address. We avoid looping * back outbound packets in different zones but on the * same ill, as the application would see duplicates. * * If the interfaces are part of the same group, * we would want to send only one copy out for * whole group. * * This logic assumes that ire_add_v4() groups the * IRE_BROADCAST entries so that those with the same * ire_addr and ill_group are kept together. */ ire_ill = ire->ire_ipif->ipif_ill; if (ire->ire_stq == NULL && ire1->ire_stq != NULL) { if (ire_ill->ill_group != NULL && (ire->ire_marks & IRE_MARK_NORECV)) { /* * If the current zone only has an ire * broadcast for this address marked * NORECV, the ire we want is ahead in * the bucket, so we look it up * deliberately ignoring the zoneid. */ for (ire1 = ire->ire_bucket->irb_ire; ire1 != NULL; ire1 = ire1->ire_next) { ire1_ill = ire1->ire_ipif->ipif_ill; if (ire1->ire_addr != dst) continue; /* skip over the current ire */ if (ire1 == ire) continue; /* skip over deleted ires */ if (ire1->ire_marks & IRE_MARK_CONDEMNED) continue; /* * non-loopback ire in our * group: use it for the next * pass in the loop */ if (ire1->ire_stq != NULL && ire1_ill->ill_group == ire_ill->ill_group) break; } } } else { while (ire1 != NULL && ire1->ire_addr == dst) { ire1_ill = ire1->ire_ipif->ipif_ill; /* * We can have two broadcast ires on the * same ill in different zones; here * we'll send a copy of the packet on * each ill and the fanout code will * call conn_wantpacket() to check that * the zone has the broadcast address * configured on the ill. If the two * ires are in the same group we only * send one copy up. */ if (ire1_ill != ire_ill && (ire1_ill->ill_group == NULL || ire_ill->ill_group == NULL || ire1_ill->ill_group != ire_ill->ill_group)) { break; } ire1 = ire1->ire_next; } } } ASSERT(multirt_send == B_FALSE); if (ire1 != NULL && ire1->ire_addr == dst) { if ((ire->ire_flags & RTF_MULTIRT) && (ire1->ire_flags & RTF_MULTIRT)) { /* * We are in the multirouting case. * The message must be sent at least * on both ires. These ires have been * inserted AFTER the standard ones * in ip_rt_add(). There are thus no * other ire entries for the destination * address in the rest of the bucket * that do not have the RTF_MULTIRT * flag. We don't process a copy * of the message here. This will be * done in the final sending loop. */ multirt_send = B_TRUE; } else { next_mp = ip_copymsg(first_mp); if (next_mp != NULL) IRE_REFHOLD(ire1); } } rw_exit(&ire->ire_bucket->irb_lock); } if (stq) { /* * A non-NULL send-to queue means this packet is going * out of this machine. */ BUMP_MIB(&ip_mib, ipOutRequests); ttl_protocol = ((uint16_t *)ipha)[4]; /* * We accumulate the pseudo header checksum in cksum. * This is pretty hairy code, so watch close. One * thing to keep in mind is that UDP and TCP have * stored their respective datagram lengths in their * checksum fields. This lines things up real nice. */ cksum = (dst >> 16) + (dst & 0xFFFF) + (src >> 16) + (src & 0xFFFF); /* * We assume the udp checksum field contains the * length, so to compute the pseudo header checksum, * all we need is the protocol number and src/dst. */ /* Provide the checksums for UDP and TCP. */ if ((PROTO == IPPROTO_TCP) && (ip_hdr_included != IP_HDR_INCLUDED)) { /* hlen gets the number of uchar_ts in the IP header */ hlen = (V_HLEN & 0xF) << 2; up = IPH_TCPH_CHECKSUMP(ipha, hlen); IP_STAT(ip_out_sw_cksum); IP_STAT_UPDATE(ip_tcp_out_sw_cksum_bytes, LENGTH - hlen); *up = IP_CSUM(mp, hlen, cksum + IP_TCP_CSUM_COMP); if (*up == 0) *up = 0xFFFF; } else if (PROTO == IPPROTO_SCTP && (ip_hdr_included != IP_HDR_INCLUDED)) { sctp_hdr_t *sctph; hlen = (V_HLEN & 0xF) << 2; ASSERT(MBLKL(mp) >= (hlen + sizeof (*sctph))); sctph = (sctp_hdr_t *)(mp->b_rptr + hlen); sctph->sh_chksum = 0; #ifdef DEBUG if (!skip_sctp_cksum) #endif sctph->sh_chksum = sctp_cksum(mp, hlen); } else { queue_t *dev_q = stq->q_next; if ((dev_q->q_next || dev_q->q_first) && !canput(dev_q)) { blocked: ipha->ipha_ident = ip_hdr_included; /* * If we don't have a conn to apply * backpressure, free the message. * In the ire_send path, we don't know * the position to requeue the packet. Rather * than reorder packets, we just drop this * packet. */ if (ip_output_queue && connp != NULL && caller != IRE_SEND) { if (caller == IP_WSRV) { connp->conn_did_putbq = 1; (void) putbq(connp->conn_wq, first_mp); conn_drain_insert(connp); /* * This is the service thread, * and the queue is already * noenabled. The check for * canput and the putbq is not * atomic. So we need to check * again. */ if (canput(stq->q_next)) connp->conn_did_putbq = 0; IP_STAT(ip_conn_flputbq); } else { /* * We are not the service proc. * ip_wsrv will be scheduled or * is already running. */ (void) putq(connp->conn_wq, first_mp); } } else { BUMP_MIB(&ip_mib, ipOutDiscards); freemsg(first_mp); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "discard"); } ire_refrele(ire); if (next_mp) { ire_refrele(ire1); freemsg(next_mp); } if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } if ((PROTO == IPPROTO_UDP) && (ip_hdr_included != IP_HDR_INCLUDED)) { /* * hlen gets the number of uchar_ts in the * IP header */ hlen = (V_HLEN & 0xF) << 2; up = IPH_UDPH_CHECKSUMP(ipha, hlen); max_frag = ire->ire_max_frag; if (*up != 0) { IP_CKSUM_XMIT(ire_ill, ire, mp, ipha, up, PROTO, hlen, LENGTH, max_frag, ipsec_len, cksum); /* Software checksum? */ if (DB_CKSUMFLAGS(mp) == 0) { IP_STAT(ip_out_sw_cksum); IP_STAT_UPDATE( ip_udp_out_sw_cksum_bytes, LENGTH - hlen); } } } } /* * Need to do this even when fragmenting. The local * loopback can be done without computing checksums * but forwarding out other interface must be done * after the IP checksum (and ULP checksums) have been * computed. * * NOTE : multicast_forward is set only if this packet * originated from ip_wput. For packets originating from * ip_wput_multicast, it is not set. */ if (CLASSD(ipha->ipha_dst) && multicast_forward) { multi_loopback: ip2dbg(("ip_wput: multicast, loop %d\n", conn_multicast_loop)); /* Forget header checksum offload */ DB_CKSUMFLAGS(mp) &= ~HCK_IPV4_HDRCKSUM; /* * Local loopback of multicasts? Check the * ill. * * Note that the loopback function will not come * in through ip_rput - it will only do the * client fanout thus we need to do an mforward * as well. The is different from the BSD * logic. */ if (ill != NULL) { ilm_t *ilm; ILM_WALKER_HOLD(ill); ilm = ilm_lookup_ill(ill, ipha->ipha_dst, ALL_ZONES); ILM_WALKER_RELE(ill); if (ilm != NULL) { /* * Pass along the virtual output q. * ip_wput_local() will distribute the * packet to all the matching zones, * except the sending zone when * IP_MULTICAST_LOOP is false. */ ip_multicast_loopback(q, ill, first_mp, conn_multicast_loop ? 0 : IP_FF_NO_MCAST_LOOP, zoneid); } } if (ipha->ipha_ttl == 0) { /* * 0 => only to this host i.e. we are * done. We are also done if this was the * loopback interface since it is sufficient * to loopback one copy of a multicast packet. */ freemsg(first_mp); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "loopback"); ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } /* * ILLF_MULTICAST is checked in ip_newroute * i.e. we don't need to check it here since * all IRE_CACHEs come from ip_newroute. * For multicast traffic, SO_DONTROUTE is interpreted * to mean only send the packet out the interface * (optionally specified with IP_MULTICAST_IF) * and do not forward it out additional interfaces. * RSVP and the rsvp daemon is an example of a * protocol and user level process that * handles it's own routing. Hence, it uses the * SO_DONTROUTE option to accomplish this. */ if (ip_g_mrouter && !conn_dontroute && ill != NULL) { /* Unconditionally redo the checksum */ ipha->ipha_hdr_checksum = 0; ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); /* * If this needs to go out secure, we need * to wait till we finish the IPSEC * processing. */ if (ipsec_len == 0 && ip_mforward(ill, ipha, mp)) { freemsg(first_mp); ip1dbg(("ip_wput: mforward failed\n")); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "mforward failed"); ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } } } max_frag = ire->ire_max_frag; cksum += ttl_protocol; if (max_frag >= (uint_t)(LENGTH + ipsec_len)) { /* No fragmentation required for this one. */ /* * Don't use frag_flag if packet is pre-built or source * routed or if multicast (since multicast packets do * not solicit ICMP "packet too big" messages). */ if ((ip_hdr_included != IP_HDR_INCLUDED) && (V_HLEN == IP_SIMPLE_HDR_VERSION || !ip_source_route_included(ipha)) && !CLASSD(ipha->ipha_dst)) ipha->ipha_fragment_offset_and_flags |= htons(ire->ire_frag_flag); if (!(DB_CKSUMFLAGS(mp) & HCK_IPV4_HDRCKSUM)) { /* Complete the IP header checksum. */ cksum += ipha->ipha_ident; cksum += (v_hlen_tos_len >> 16)+ (v_hlen_tos_len & 0xFFFF); cksum += ipha->ipha_fragment_offset_and_flags; hlen = (V_HLEN & 0xF) - IP_SIMPLE_HDR_LENGTH_IN_WORDS; if (hlen) { checksumoptions: /* * Account for the IP Options in the IP * header checksum. */ up = (uint16_t *)(rptr+ IP_SIMPLE_HDR_LENGTH); do { cksum += up[0]; cksum += up[1]; up += 2; } while (--hlen); } cksum = ((cksum & 0xFFFF) + (cksum >> 16)); cksum = ~(cksum + (cksum >> 16)); ipha->ipha_hdr_checksum = (uint16_t)cksum; } if (ipsec_len != 0) { ipsec_out_process(q, first_mp, ire, ill_index); if (!next_mp) { ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } goto next; } /* * multirt_send has already been handled * for broadcast, but not yet for multicast * or IP options. */ if (next_mp == NULL) { if (ire->ire_flags & RTF_MULTIRT) { multirt_send = B_TRUE; } } /* * In most cases, the emission loop below is * entered only once. Only in the case where * the ire holds the RTF_MULTIRT flag, do we loop * to process all RTF_MULTIRT ires in the bucket, * and send the packet through all crossed * RTF_MULTIRT routes. */ do { if (multirt_send) { irb_t *irb; irb = ire->ire_bucket; ASSERT(irb != NULL); /* * We are in a multiple send case, * need to get the next IRE and make * a duplicate of the packet. */ IRB_REFHOLD(irb); for (ire1 = ire->ire_next; ire1 != NULL; ire1 = ire1->ire_next) { if (!(ire1->ire_flags & RTF_MULTIRT)) continue; if (ire1->ire_addr != ire->ire_addr) continue; if (ire1->ire_marks & (IRE_MARK_CONDEMNED| IRE_MARK_HIDDEN)) continue; /* Got one */ IRE_REFHOLD(ire1); break; } IRB_REFRELE(irb); if (ire1 != NULL) { next_mp = copyb(mp); if ((next_mp == NULL) || ((mp->b_cont != NULL) && ((next_mp->b_cont = dupmsg(mp->b_cont)) == NULL))) { freemsg(next_mp); next_mp = NULL; ire_refrele(ire1); ire1 = NULL; } } /* * Last multiroute ire; don't loop * anymore. The emission is over * and next_mp is NULL. */ if (ire1 == NULL) { multirt_send = B_FALSE; } } out_ill = ire->ire_ipif->ipif_ill; DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, out_ill, ipha, mp, mp); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp == NULL) goto release_ire_and_ill_2; ASSERT(ipsec_len == 0); mp->b_prev = SET_BPREV_FLAG(IPP_LOCAL_OUT); DTRACE_PROBE2(ip__xmit__2, mblk_t *, mp, ire_t *, ire); pktxmit_state = ip_xmit_v4(mp, ire, NULL, B_TRUE); if ((pktxmit_state == SEND_FAILED) || (pktxmit_state == LLHDR_RESLV_FAILED)) { release_ire_and_ill_2: if (next_mp) { freemsg(next_mp); ire_refrele(ire1); } ire_refrele(ire); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "discard MDATA"); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } if (multirt_send) { /* * We are in a multiple send case, * need to re-enter the sending loop * using the next ire. */ ire_refrele(ire); ire = ire1; stq = ire->ire_stq; mp = next_mp; next_mp = NULL; ipha = (ipha_t *)mp->b_rptr; ill_index = Q_TO_INDEX(stq); } } while (multirt_send); if (!next_mp) { /* * Last copy going out (the ultra-common * case). Note that we intentionally replicate * the putnext rather than calling it before * the next_mp check in hopes of a little * tail-call action out of the compiler. */ TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "last copy out(1)"); ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } /* More copies going out below. */ } else { int offset; fragmentit: offset = ntohs(ipha->ipha_fragment_offset_and_flags); /* * If this would generate a icmp_frag_needed message, * we need to handle it before we do the IPSEC * processing. Otherwise, we need to strip the IPSEC * headers before we send up the message to the ULPs * which becomes messy and difficult. */ if (ipsec_len != 0) { if ((max_frag < (unsigned int)(LENGTH + ipsec_len)) && (offset & IPH_DF)) { BUMP_MIB(&ip_mib, ipFragFails); ipha->ipha_hdr_checksum = 0; ipha->ipha_hdr_checksum = (uint16_t)ip_csum_hdr(ipha); icmp_frag_needed(ire->ire_stq, first_mp, max_frag, zoneid); if (!next_mp) { ire_refrele(ire); if (conn_outgoing_ill != NULL) { ill_refrele( conn_outgoing_ill); } return; } } else { /* * This won't cause a icmp_frag_needed * message. to be gnerated. Send it on * the wire. Note that this could still * cause fragmentation and all we * do is the generation of the message * to the ULP if needed before IPSEC. */ if (!next_mp) { ipsec_out_process(q, first_mp, ire, ill_index); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p " "(%S)", q, "last ipsec_out_process"); ire_refrele(ire); if (conn_outgoing_ill != NULL) { ill_refrele( conn_outgoing_ill); } return; } ipsec_out_process(q, first_mp, ire, ill_index); } } else { /* * Initiate IPPF processing. For * fragmentable packets we finish * all QOS packet processing before * calling: * ip_wput_ire_fragmentit->ip_wput_frag */ if (IPP_ENABLED(IPP_LOCAL_OUT)) { ip_process(IPP_LOCAL_OUT, &mp, ill_index); if (mp == NULL) { BUMP_MIB(&ip_mib, ipOutDiscards); if (next_mp != NULL) { freemsg(next_mp); ire_refrele(ire1); } ire_refrele(ire); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire: q %p (%S)", q, "discard MDATA"); if (conn_outgoing_ill != NULL) { ill_refrele( conn_outgoing_ill); } return; } } if (!next_mp) { TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "last fragmentation"); ip_wput_ire_fragmentit(mp, ire, zoneid); ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } ip_wput_ire_fragmentit(mp, ire, zoneid); } } } else { nullstq: /* A NULL stq means the destination address is local. */ UPDATE_OB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; ASSERT(ire->ire_ipif != NULL); if (!next_mp) { /* * Is there an "in" and "out" for traffic local * to a host (loopback)? The code in Solaris doesn't * explicitly draw a line in its code for in vs out, * so we've had to draw a line in the sand: ip_wput_ire * is considered to be the "output" side and * ip_wput_local to be the "input" side. */ out_ill = ire->ire_ipif->ipif_ill; DTRACE_PROBE4(ip4__loopback__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, first_mp); FW_HOOKS(ip4_loopback_out_event, ipv4firewall_loopback_out, NULL, out_ill, ipha, first_mp, mp); DTRACE_PROBE1(ip4__loopback__out_end, mblk_t *, first_mp); TRACE_2(TR_FAC_IP, TR_IP_WPUT_IRE_END, "ip_wput_ire_end: q %p (%S)", q, "local address"); if (first_mp != NULL) ip_wput_local(q, out_ill, ipha, first_mp, ire, 0, ire->ire_zoneid); ire_refrele(ire); if (conn_outgoing_ill != NULL) ill_refrele(conn_outgoing_ill); return; } out_ill = ire->ire_ipif->ipif_ill; DTRACE_PROBE4(ip4__loopback__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, first_mp); FW_HOOKS(ip4_loopback_out_event, ipv4firewall_loopback_out, NULL, out_ill, ipha, first_mp, mp); DTRACE_PROBE1(ip4__loopback__out__end, mblk_t *, first_mp); if (first_mp != NULL) ip_wput_local(q, out_ill, ipha, first_mp, ire, 0, ire->ire_zoneid); } next: /* * More copies going out to additional interfaces. * ire1 has already been held. We don't need the * "ire" anymore. */ ire_refrele(ire); ire = ire1; ASSERT(ire != NULL && ire->ire_refcnt >= 1 && next_mp != NULL); mp = next_mp; ASSERT(ire->ire_ipversion == IPV4_VERSION); ill = ire_to_ill(ire); first_mp = mp; if (ipsec_len != 0) { ASSERT(first_mp->b_datap->db_type == M_CTL); mp = mp->b_cont; } dst = ire->ire_addr; ipha = (ipha_t *)mp->b_rptr; /* * Restore src so that we will pick up ire->ire_src_addr if src was 0. * Restore ipha_ident "no checksum" flag. */ src = orig_src; ipha->ipha_ident = ip_hdr_included; goto another; #undef rptr #undef Q_TO_INDEX } /* * Routine to allocate a message that is used to notify the ULP about MDT. * The caller may provide a pointer to the link-layer MDT capabilities, * or NULL if MDT is to be disabled on the stream. */ mblk_t * ip_mdinfo_alloc(ill_mdt_capab_t *isrc) { mblk_t *mp; ip_mdt_info_t *mdti; ill_mdt_capab_t *idst; if ((mp = allocb(sizeof (*mdti), BPRI_HI)) != NULL) { DB_TYPE(mp) = M_CTL; mp->b_wptr = mp->b_rptr + sizeof (*mdti); mdti = (ip_mdt_info_t *)mp->b_rptr; mdti->mdt_info_id = MDT_IOC_INFO_UPDATE; idst = &(mdti->mdt_capab); /* * If the caller provides us with the capability, copy * it over into our notification message; otherwise * we zero out the capability portion. */ if (isrc != NULL) bcopy((caddr_t)isrc, (caddr_t)idst, sizeof (*idst)); else bzero((caddr_t)idst, sizeof (*idst)); } return (mp); } /* * Routine which determines whether MDT can be enabled on the destination * IRE and IPC combination, and if so, allocates and returns the MDT * notification mblk that may be used by ULP. We also check if we need to * turn MDT back to 'on' when certain restrictions prohibiting us to allow * MDT usage in the past have been lifted. This gets called during IP * and ULP binding. */ mblk_t * ip_mdinfo_return(ire_t *dst_ire, conn_t *connp, char *ill_name, ill_mdt_capab_t *mdt_cap) { mblk_t *mp; boolean_t rc = B_FALSE; ASSERT(dst_ire != NULL); ASSERT(connp != NULL); ASSERT(mdt_cap != NULL); /* * Currently, we only support simple TCP/{IPv4,IPv6} with * Multidata, which is handled in tcp_multisend(). This * is the reason why we do all these checks here, to ensure * that we don't enable Multidata for the cases which we * can't handle at the moment. */ do { /* Only do TCP at the moment */ if (connp->conn_ulp != IPPROTO_TCP) break; /* * IPSEC outbound policy present? Note that we get here * after calling ipsec_conn_cache_policy() where the global * policy checking is performed. conn_latch will be * non-NULL as long as there's a policy defined, * i.e. conn_out_enforce_policy may be NULL in such case * when the connection is non-secure, and hence we check * further if the latch refers to an outbound policy. */ if (CONN_IPSEC_OUT_ENCAPSULATED(connp)) break; /* CGTP (multiroute) is enabled? */ if (dst_ire->ire_flags & RTF_MULTIRT) break; /* Outbound IPQoS enabled? */ if (IPP_ENABLED(IPP_LOCAL_OUT)) { /* * In this case, we disable MDT for this and all * future connections going over the interface. */ mdt_cap->ill_mdt_on = 0; break; } /* socket option(s) present? */ if (!CONN_IS_LSO_MD_FASTPATH(connp)) break; rc = B_TRUE; /* CONSTCOND */ } while (0); /* Remember the result */ connp->conn_mdt_ok = rc; if (!rc) return (NULL); else if (!mdt_cap->ill_mdt_on) { /* * If MDT has been previously turned off in the past, and we * currently can do MDT (due to IPQoS policy removal, etc.) * then enable it for this interface. */ mdt_cap->ill_mdt_on = 1; ip1dbg(("ip_mdinfo_return: reenabling MDT for " "interface %s\n", ill_name)); } /* Allocate the MDT info mblk */ if ((mp = ip_mdinfo_alloc(mdt_cap)) == NULL) { ip0dbg(("ip_mdinfo_return: can't enable Multidata for " "conn %p on %s (ENOMEM)\n", (void *)connp, ill_name)); return (NULL); } return (mp); } /* * Routine to allocate a message that is used to notify the ULP about LSO. * The caller may provide a pointer to the link-layer LSO capabilities, * or NULL if LSO is to be disabled on the stream. */ mblk_t * ip_lsoinfo_alloc(ill_lso_capab_t *isrc) { mblk_t *mp; ip_lso_info_t *lsoi; ill_lso_capab_t *idst; if ((mp = allocb(sizeof (*lsoi), BPRI_HI)) != NULL) { DB_TYPE(mp) = M_CTL; mp->b_wptr = mp->b_rptr + sizeof (*lsoi); lsoi = (ip_lso_info_t *)mp->b_rptr; lsoi->lso_info_id = LSO_IOC_INFO_UPDATE; idst = &(lsoi->lso_capab); /* * If the caller provides us with the capability, copy * it over into our notification message; otherwise * we zero out the capability portion. */ if (isrc != NULL) bcopy((caddr_t)isrc, (caddr_t)idst, sizeof (*idst)); else bzero((caddr_t)idst, sizeof (*idst)); } return (mp); } /* * Routine which determines whether LSO can be enabled on the destination * IRE and IPC combination, and if so, allocates and returns the LSO * notification mblk that may be used by ULP. We also check if we need to * turn LSO back to 'on' when certain restrictions prohibiting us to allow * LSO usage in the past have been lifted. This gets called during IP * and ULP binding. */ mblk_t * ip_lsoinfo_return(ire_t *dst_ire, conn_t *connp, char *ill_name, ill_lso_capab_t *lso_cap) { mblk_t *mp; ASSERT(dst_ire != NULL); ASSERT(connp != NULL); ASSERT(lso_cap != NULL); connp->conn_lso_ok = B_TRUE; if ((connp->conn_ulp != IPPROTO_TCP) || CONN_IPSEC_OUT_ENCAPSULATED(connp) || (dst_ire->ire_flags & RTF_MULTIRT) || !CONN_IS_LSO_MD_FASTPATH(connp) || (IPP_ENABLED(IPP_LOCAL_OUT))) { connp->conn_lso_ok = B_FALSE; if (IPP_ENABLED(IPP_LOCAL_OUT)) { /* * Disable LSO for this and all future connections going * over the interface. */ lso_cap->ill_lso_on = 0; } } if (!connp->conn_lso_ok) return (NULL); else if (!lso_cap->ill_lso_on) { /* * If LSO has been previously turned off in the past, and we * currently can do LSO (due to IPQoS policy removal, etc.) * then enable it for this interface. */ lso_cap->ill_lso_on = 1; ip1dbg(("ip_mdinfo_return: reenabling LSO for interface %s\n", ill_name)); } /* Allocate the LSO info mblk */ if ((mp = ip_lsoinfo_alloc(lso_cap)) == NULL) ip0dbg(("ip_lsoinfo_return: can't enable LSO for " "conn %p on %s (ENOMEM)\n", (void *)connp, ill_name)); return (mp); } /* * Create destination address attribute, and fill it with the physical * destination address and SAP taken from the template DL_UNITDATA_REQ * message block. */ boolean_t ip_md_addr_attr(multidata_t *mmd, pdesc_t *pd, const mblk_t *dlmp) { dl_unitdata_req_t *dlurp; pattr_t *pa; pattrinfo_t pa_info; pattr_addr_t **das = (pattr_addr_t **)&pa_info.buf; uint_t das_len, das_off; ASSERT(dlmp != NULL); dlurp = (dl_unitdata_req_t *)dlmp->b_rptr; das_len = dlurp->dl_dest_addr_length; das_off = dlurp->dl_dest_addr_offset; pa_info.type = PATTR_DSTADDRSAP; pa_info.len = sizeof (**das) + das_len - 1; /* create and associate the attribute */ pa = mmd_addpattr(mmd, pd, &pa_info, B_TRUE, KM_NOSLEEP); if (pa != NULL) { ASSERT(*das != NULL); (*das)->addr_is_group = 0; (*das)->addr_len = (uint8_t)das_len; bcopy((caddr_t)dlurp + das_off, (*das)->addr, das_len); } return (pa != NULL); } /* * Create hardware checksum attribute and fill it with the values passed. */ boolean_t ip_md_hcksum_attr(multidata_t *mmd, pdesc_t *pd, uint32_t start_offset, uint32_t stuff_offset, uint32_t end_offset, uint32_t flags) { pattr_t *pa; pattrinfo_t pa_info; ASSERT(mmd != NULL); pa_info.type = PATTR_HCKSUM; pa_info.len = sizeof (pattr_hcksum_t); /* create and associate the attribute */ pa = mmd_addpattr(mmd, pd, &pa_info, B_TRUE, KM_NOSLEEP); if (pa != NULL) { pattr_hcksum_t *hck = (pattr_hcksum_t *)pa_info.buf; hck->hcksum_start_offset = start_offset; hck->hcksum_stuff_offset = stuff_offset; hck->hcksum_end_offset = end_offset; hck->hcksum_flags = flags; } return (pa != NULL); } /* * Create zerocopy attribute and fill it with the specified flags */ boolean_t ip_md_zcopy_attr(multidata_t *mmd, pdesc_t *pd, uint_t flags) { pattr_t *pa; pattrinfo_t pa_info; ASSERT(mmd != NULL); pa_info.type = PATTR_ZCOPY; pa_info.len = sizeof (pattr_zcopy_t); /* create and associate the attribute */ pa = mmd_addpattr(mmd, pd, &pa_info, B_TRUE, KM_NOSLEEP); if (pa != NULL) { pattr_zcopy_t *zcopy = (pattr_zcopy_t *)pa_info.buf; zcopy->zcopy_flags = flags; } return (pa != NULL); } /* * Check if ip_wput_frag_mdt() and ip_wput_frag_mdt_v6() can handle a message * block chain. We could rewrite to handle arbitrary message block chains but * that would make the code complicated and slow. Right now there three * restrictions: * * 1. The first message block must contain the complete IP header and * at least 1 byte of payload data. * 2. At most MULTIDATA_MAX_PBUFS non-empty message blocks are allowed * so that we can use a single Multidata message. * 3. No frag must be distributed over two or more message blocks so * that we don't need more than two packet descriptors per frag. * * The above restrictions allow us to support userland applications (which * will send down a single message block) and NFS over UDP (which will * send down a chain of at most three message blocks). * * We also don't use MDT for payloads with less than or equal to * ip_wput_frag_mdt_min bytes because it would cause too much overhead. */ boolean_t ip_can_frag_mdt(mblk_t *mp, ssize_t hdr_len, ssize_t len) { int blocks; ssize_t total, missing, size; ASSERT(mp != NULL); ASSERT(hdr_len > 0); size = MBLKL(mp) - hdr_len; if (size <= 0) return (B_FALSE); /* The first mblk contains the header and some payload. */ blocks = 1; total = size; size %= len; missing = (size == 0) ? 0 : (len - size); mp = mp->b_cont; while (mp != NULL) { /* * Give up if we encounter a zero length message block. * In practice, this should rarely happen and therefore * not worth the trouble of freeing and re-linking the * mblk from the chain to handle such case. */ if ((size = MBLKL(mp)) == 0) return (B_FALSE); /* Too many payload buffers for a single Multidata message? */ if (++blocks > MULTIDATA_MAX_PBUFS) return (B_FALSE); total += size; /* Is a frag distributed over two or more message blocks? */ if (missing > size) return (B_FALSE); size -= missing; size %= len; missing = (size == 0) ? 0 : (len - size); mp = mp->b_cont; } return (total > ip_wput_frag_mdt_min); } /* * Outbound IPv4 fragmentation routine using MDT. */ static void ip_wput_frag_mdt(ire_t *ire, mblk_t *mp, ip_pkt_t pkt_type, int len, uint32_t frag_flag, int offset) { ipha_t *ipha_orig; int i1, ip_data_end; uint_t pkts, wroff, hdr_chunk_len, pbuf_idx; mblk_t *hdr_mp, *md_mp = NULL; unsigned char *hdr_ptr, *pld_ptr; multidata_t *mmd; ip_pdescinfo_t pdi; ASSERT(DB_TYPE(mp) == M_DATA); ASSERT(MBLKL(mp) > sizeof (ipha_t)); ipha_orig = (ipha_t *)mp->b_rptr; mp->b_rptr += sizeof (ipha_t); /* Calculate how many packets we will send out */ i1 = (mp->b_cont == NULL) ? MBLKL(mp) : msgsize(mp); pkts = (i1 + len - 1) / len; ASSERT(pkts > 1); /* Allocate a message block which will hold all the IP Headers. */ wroff = ip_wroff_extra; hdr_chunk_len = wroff + IP_SIMPLE_HDR_LENGTH; i1 = pkts * hdr_chunk_len; /* * Create the header buffer, Multidata and destination address * and SAP attribute that should be associated with it. */ if ((hdr_mp = allocb(i1, BPRI_HI)) == NULL || ((hdr_mp->b_wptr += i1), (mmd = mmd_alloc(hdr_mp, &md_mp, KM_NOSLEEP)) == NULL) || !ip_md_addr_attr(mmd, NULL, ire->ire_nce->nce_res_mp)) { freemsg(mp); if (md_mp == NULL) { freemsg(hdr_mp); } else { free_mmd: IP_STAT(ip_frag_mdt_discarded); freemsg(md_mp); } IP_STAT(ip_frag_mdt_allocfail); UPDATE_MIB(&ip_mib, ipOutDiscards, pkts); return; } IP_STAT(ip_frag_mdt_allocd); /* * Add a payload buffer to the Multidata; this operation must not * fail, or otherwise our logic in this routine is broken. There * is no memory allocation done by the routine, so any returned * failure simply tells us that we've done something wrong. * * A failure tells us that either we're adding the same payload * buffer more than once, or we're trying to add more buffers than * allowed. None of the above cases should happen, and we panic * because either there's horrible heap corruption, and/or * programming mistake. */ if ((pbuf_idx = mmd_addpldbuf(mmd, mp)) < 0) goto pbuf_panic; hdr_ptr = hdr_mp->b_rptr; pld_ptr = mp->b_rptr; /* Establish the ending byte offset, based on the starting offset. */ offset <<= 3; ip_data_end = offset + ntohs(ipha_orig->ipha_length) - IP_SIMPLE_HDR_LENGTH; pdi.flags = PDESC_HBUF_REF | PDESC_PBUF_REF; while (pld_ptr < mp->b_wptr) { ipha_t *ipha; uint16_t offset_and_flags; uint16_t ip_len; int error; ASSERT((hdr_ptr + hdr_chunk_len) <= hdr_mp->b_wptr); ipha = (ipha_t *)(hdr_ptr + wroff); ASSERT(OK_32PTR(ipha)); *ipha = *ipha_orig; if (ip_data_end - offset > len) { offset_and_flags = IPH_MF; } else { /* * Last frag. Set len to the length of this last piece. */ len = ip_data_end - offset; /* A frag of a frag might have IPH_MF non-zero */ offset_and_flags = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_MF; } offset_and_flags |= (uint16_t)(offset >> 3); offset_and_flags |= (uint16_t)frag_flag; /* Store the offset and flags in the IP header. */ ipha->ipha_fragment_offset_and_flags = htons(offset_and_flags); /* Store the length in the IP header. */ ip_len = (uint16_t)(len + IP_SIMPLE_HDR_LENGTH); ipha->ipha_length = htons(ip_len); /* * Set the IP header checksum. Note that mp is just * the header, so this is easy to pass to ip_csum. */ ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); /* * Record offset and size of header and data of the next packet * in the multidata message. */ PDESC_HDR_ADD(&pdi, hdr_ptr, wroff, IP_SIMPLE_HDR_LENGTH, 0); PDESC_PLD_INIT(&pdi); i1 = MIN(mp->b_wptr - pld_ptr, len); ASSERT(i1 > 0); PDESC_PLD_SPAN_ADD(&pdi, pbuf_idx, pld_ptr, i1); if (i1 == len) { pld_ptr += len; } else { i1 = len - i1; mp = mp->b_cont; ASSERT(mp != NULL); ASSERT(MBLKL(mp) >= i1); /* * Attach the next payload message block to the * multidata message. */ if ((pbuf_idx = mmd_addpldbuf(mmd, mp)) < 0) goto pbuf_panic; PDESC_PLD_SPAN_ADD(&pdi, pbuf_idx, mp->b_rptr, i1); pld_ptr = mp->b_rptr + i1; } if ((mmd_addpdesc(mmd, (pdescinfo_t *)&pdi, &error, KM_NOSLEEP)) == NULL) { /* * Any failure other than ENOMEM indicates that we * have passed in invalid pdesc info or parameters * to mmd_addpdesc, which must not happen. * * EINVAL is a result of failure on boundary checks * against the pdesc info contents. It should not * happen, and we panic because either there's * horrible heap corruption, and/or programming * mistake. */ if (error != ENOMEM) { cmn_err(CE_PANIC, "ip_wput_frag_mdt: " "pdesc logic error detected for " "mmd %p pinfo %p (%d)\n", (void *)mmd, (void *)&pdi, error); /* NOTREACHED */ } IP_STAT(ip_frag_mdt_addpdescfail); /* Free unattached payload message blocks as well */ md_mp->b_cont = mp->b_cont; goto free_mmd; } /* Advance fragment offset. */ offset += len; /* Advance to location for next header in the buffer. */ hdr_ptr += hdr_chunk_len; /* Did we reach the next payload message block? */ if (pld_ptr == mp->b_wptr && mp->b_cont != NULL) { mp = mp->b_cont; /* * Attach the next message block with payload * data to the multidata message. */ if ((pbuf_idx = mmd_addpldbuf(mmd, mp)) < 0) goto pbuf_panic; pld_ptr = mp->b_rptr; } } ASSERT(hdr_mp->b_wptr == hdr_ptr); ASSERT(mp->b_wptr == pld_ptr); /* Update IP statistics */ UPDATE_MIB(&ip_mib, ipFragCreates, pkts); BUMP_MIB(&ip_mib, ipFragOKs); IP_STAT_UPDATE(ip_frag_mdt_pkt_out, pkts); if (pkt_type == OB_PKT) { ire->ire_ob_pkt_count += pkts; if (ire->ire_ipif != NULL) atomic_add_32(&ire->ire_ipif->ipif_ob_pkt_count, pkts); } else { /* * The type is IB_PKT in the forwarding path and in * the mobile IP case when the packet is being reverse- * tunneled to the home agent. */ ire->ire_ib_pkt_count += pkts; ASSERT(!IRE_IS_LOCAL(ire)); if (ire->ire_type & IRE_BROADCAST) atomic_add_32(&ire->ire_ipif->ipif_ib_pkt_count, pkts); else atomic_add_32(&ire->ire_ipif->ipif_fo_pkt_count, pkts); } ire->ire_last_used_time = lbolt; /* Send it down */ putnext(ire->ire_stq, md_mp); return; pbuf_panic: cmn_err(CE_PANIC, "ip_wput_frag_mdt: payload buffer logic " "error for mmd %p pbuf %p (%d)", (void *)mmd, (void *)mp, pbuf_idx); /* NOTREACHED */ } /* * Outbound IP fragmentation routine. * * NOTE : This routine does not ire_refrele the ire that is passed in * as the argument. */ static void ip_wput_frag(ire_t *ire, mblk_t *mp_orig, ip_pkt_t pkt_type, uint32_t max_frag, uint32_t frag_flag, zoneid_t zoneid) { int i1; mblk_t *ll_hdr_mp; int ll_hdr_len; int hdr_len; mblk_t *hdr_mp; ipha_t *ipha; int ip_data_end; int len; mblk_t *mp = mp_orig, *mp1; int offset; queue_t *q; uint32_t v_hlen_tos_len; mblk_t *first_mp; boolean_t mctl_present; ill_t *ill; ill_t *out_ill; mblk_t *xmit_mp; mblk_t *carve_mp; ire_t *ire1 = NULL; ire_t *save_ire = NULL; mblk_t *next_mp = NULL; boolean_t last_frag = B_FALSE; boolean_t multirt_send = B_FALSE; ire_t *first_ire = NULL; irb_t *irb = NULL; /* * IPSEC does not allow hw accelerated packets to be fragmented * This check is made in ip_wput_ipsec_out prior to coming here * via ip_wput_ire_fragmentit. * * If at this point we have an ire whose ARP request has not * been sent out, we call ip_xmit_v4->ire_arpresolve to trigger * sending of ARP query and change ire's state to ND_INCOMPLETE. * This packet and all fragmentable packets for this ire will * continue to get dropped while ire_nce->nce_state remains in * ND_INCOMPLETE. Post-ARP resolution, after ire's nce_state changes to * ND_REACHABLE, all subsquent large packets for this ire will * get fragemented and sent out by this function. */ if (ire->ire_nce && ire->ire_nce->nce_state != ND_REACHABLE) { /* If nce_state is ND_INITIAL, trigger ARP query */ (void) ip_xmit_v4(NULL, ire, NULL, B_FALSE); ip1dbg(("ip_wput_frag: mac address for ire is unresolved" " - dropping packet\n")); BUMP_MIB(&ip_mib, ipFragFails); freemsg(mp); return; } TRACE_0(TR_FAC_IP, TR_IP_WPUT_FRAG_START, "ip_wput_frag_start:"); if (mp->b_datap->db_type == M_CTL) { first_mp = mp; mp_orig = mp = mp->b_cont; mctl_present = B_TRUE; } else { first_mp = mp; mctl_present = B_FALSE; } ASSERT(MBLKL(mp) >= sizeof (ipha_t)); ipha = (ipha_t *)mp->b_rptr; /* * If the Don't Fragment flag is on, generate an ICMP destination * unreachable, fragmentation needed. */ offset = ntohs(ipha->ipha_fragment_offset_and_flags); if (offset & IPH_DF) { BUMP_MIB(&ip_mib, ipFragFails); /* * Need to compute hdr checksum if called from ip_wput_ire. * Note that ip_rput_forward verifies the checksum before * calling this routine so in that case this is a noop. */ ipha->ipha_hdr_checksum = 0; ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); icmp_frag_needed(ire->ire_stq, first_mp, max_frag, zoneid); TRACE_1(TR_FAC_IP, TR_IP_WPUT_FRAG_END, "ip_wput_frag_end:(%S)", "don't fragment"); return; } if (mctl_present) freeb(first_mp); /* * Establish the starting offset. May not be zero if we are fragging * a fragment that is being forwarded. */ offset = offset & IPH_OFFSET; /* TODO why is this test needed? */ v_hlen_tos_len = ((uint32_t *)ipha)[0]; if (((max_frag - LENGTH) & ~7) < 8) { /* TODO: notify ulp somehow */ BUMP_MIB(&ip_mib, ipFragFails); freemsg(mp); TRACE_1(TR_FAC_IP, TR_IP_WPUT_FRAG_END, "ip_wput_frag_end:(%S)", "len < 8"); return; } hdr_len = (V_HLEN & 0xF) << 2; ipha->ipha_hdr_checksum = 0; /* * Establish the number of bytes maximum per frag, after putting * in the header. */ len = (max_frag - hdr_len) & ~7; /* Check if we can use MDT to send out the frags. */ ASSERT(!IRE_IS_LOCAL(ire)); if (hdr_len == IP_SIMPLE_HDR_LENGTH && ip_multidata_outbound && !(ire->ire_flags & RTF_MULTIRT) && !IPP_ENABLED(IPP_LOCAL_OUT) && (ill = ire_to_ill(ire)) != NULL && ILL_MDT_CAPABLE(ill) && IP_CAN_FRAG_MDT(mp, IP_SIMPLE_HDR_LENGTH, len)) { ASSERT(ill->ill_mdt_capab != NULL); if (!ill->ill_mdt_capab->ill_mdt_on) { /* * If MDT has been previously turned off in the past, * and we currently can do MDT (due to IPQoS policy * removal, etc.) then enable it for this interface. */ ill->ill_mdt_capab->ill_mdt_on = 1; ip1dbg(("ip_wput_frag: enabled MDT for interface %s\n", ill->ill_name)); } ip_wput_frag_mdt(ire, mp, pkt_type, len, frag_flag, offset); return; } /* Get a copy of the header for the trailing frags */ hdr_mp = ip_wput_frag_copyhdr((uchar_t *)ipha, hdr_len, offset); if (!hdr_mp) { BUMP_MIB(&ip_mib, ipOutDiscards); freemsg(mp); TRACE_1(TR_FAC_IP, TR_IP_WPUT_FRAG_END, "ip_wput_frag_end:(%S)", "couldn't copy hdr"); return; } if (DB_CRED(mp) != NULL) mblk_setcred(hdr_mp, DB_CRED(mp)); /* Store the starting offset, with the MoreFrags flag. */ i1 = offset | IPH_MF | frag_flag; ipha->ipha_fragment_offset_and_flags = htons((uint16_t)i1); /* Establish the ending byte offset, based on the starting offset. */ offset <<= 3; ip_data_end = offset + ntohs(ipha->ipha_length) - hdr_len; /* Store the length of the first fragment in the IP header. */ i1 = len + hdr_len; ASSERT(i1 <= IP_MAXPACKET); ipha->ipha_length = htons((uint16_t)i1); /* * Compute the IP header checksum for the first frag. We have to * watch out that we stop at the end of the header. */ ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); /* * Now carve off the first frag. Note that this will include the * original IP header. */ if (!(mp = ip_carve_mp(&mp_orig, i1))) { BUMP_MIB(&ip_mib, ipOutDiscards); freeb(hdr_mp); freemsg(mp_orig); TRACE_1(TR_FAC_IP, TR_IP_WPUT_FRAG_END, "ip_wput_frag_end:(%S)", "couldn't carve first"); return; } /* * Multirouting case. Each fragment is replicated * via all non-condemned RTF_MULTIRT routes * currently resolved. * We ensure that first_ire is the first RTF_MULTIRT * ire in the bucket. */ if (ire->ire_flags & RTF_MULTIRT) { irb = ire->ire_bucket; ASSERT(irb != NULL); multirt_send = B_TRUE; /* Make sure we do not omit any multiroute ire. */ IRB_REFHOLD(irb); for (first_ire = irb->irb_ire; first_ire != NULL; first_ire = first_ire->ire_next) { if ((first_ire->ire_flags & RTF_MULTIRT) && (first_ire->ire_addr == ire->ire_addr) && !(first_ire->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN))) break; } if (first_ire != NULL) { if (first_ire != ire) { IRE_REFHOLD(first_ire); /* * Do not release the ire passed in * as the argument. */ ire = first_ire; } else { first_ire = NULL; } } IRB_REFRELE(irb); /* * Save the first ire; we will need to restore it * for the trailing frags. * We REFHOLD save_ire, as each iterated ire will be * REFRELEd. */ save_ire = ire; IRE_REFHOLD(save_ire); } /* * First fragment emission loop. * In most cases, the emission loop below is entered only * once. Only in the case where the ire holds the RTF_MULTIRT * flag, do we loop to process all RTF_MULTIRT ires in the * bucket, and send the fragment through all crossed * RTF_MULTIRT routes. */ do { if (ire->ire_flags & RTF_MULTIRT) { /* * We are in a multiple send case, need to get * the next ire and make a copy of the packet. * ire1 holds here the next ire to process in the * bucket. If multirouting is expected, * any non-RTF_MULTIRT ire that has the * right destination address is ignored. * * We have to take into account the MTU of * each walked ire. max_frag is set by the * the caller and generally refers to * the primary ire entry. Here we ensure that * no route with a lower MTU will be used, as * fragments are carved once for all ires, * then replicated. */ ASSERT(irb != NULL); IRB_REFHOLD(irb); for (ire1 = ire->ire_next; ire1 != NULL; ire1 = ire1->ire_next) { if ((ire1->ire_flags & RTF_MULTIRT) == 0) continue; if (ire1->ire_addr != ire->ire_addr) continue; if (ire1->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN)) continue; /* * Ensure we do not exceed the MTU * of the next route. */ if (ire1->ire_max_frag < max_frag) { ip_multirt_bad_mtu(ire1, max_frag); continue; } /* Got one. */ IRE_REFHOLD(ire1); break; } IRB_REFRELE(irb); if (ire1 != NULL) { next_mp = copyb(mp); if ((next_mp == NULL) || ((mp->b_cont != NULL) && ((next_mp->b_cont = dupmsg(mp->b_cont)) == NULL))) { freemsg(next_mp); next_mp = NULL; ire_refrele(ire1); ire1 = NULL; } } /* Last multiroute ire; don't loop anymore. */ if (ire1 == NULL) { multirt_send = B_FALSE; } } ll_hdr_len = 0; LOCK_IRE_FP_MP(ire); ll_hdr_mp = ire->ire_nce->nce_fp_mp; if (ll_hdr_mp != NULL) { ASSERT(ll_hdr_mp->b_datap->db_type == M_DATA); ll_hdr_len = ll_hdr_mp->b_wptr - ll_hdr_mp->b_rptr; } else { ll_hdr_mp = ire->ire_nce->nce_res_mp; } /* If there is a transmit header, get a copy for this frag. */ /* * TODO: should check db_ref before calling ip_carve_mp since * it might give us a dup. */ if (!ll_hdr_mp) { /* No xmit header. */ xmit_mp = mp; /* We have a link-layer header that can fit in our mblk. */ } else if (mp->b_datap->db_ref == 1 && ll_hdr_len != 0 && ll_hdr_len <= mp->b_rptr - mp->b_datap->db_base) { /* M_DATA fastpath */ mp->b_rptr -= ll_hdr_len; bcopy(ll_hdr_mp->b_rptr, mp->b_rptr, ll_hdr_len); xmit_mp = mp; /* Corner case if copyb has failed */ } else if (!(xmit_mp = copyb(ll_hdr_mp))) { UNLOCK_IRE_FP_MP(ire); BUMP_MIB(&ip_mib, ipOutDiscards); freeb(hdr_mp); freemsg(mp); freemsg(mp_orig); TRACE_1(TR_FAC_IP, TR_IP_WPUT_FRAG_END, "ip_wput_frag_end:(%S)", "discard"); if (multirt_send) { ASSERT(ire1); ASSERT(next_mp); freemsg(next_mp); ire_refrele(ire1); } if (save_ire != NULL) IRE_REFRELE(save_ire); if (first_ire != NULL) ire_refrele(first_ire); return; /* * Case of res_mp OR the fastpath mp can't fit * in the mblk */ } else { xmit_mp->b_cont = mp; if (DB_CRED(mp) != NULL) mblk_setcred(xmit_mp, DB_CRED(mp)); /* * Get priority marking, if any. * We propagate the CoS marking from the * original packet that went to QoS processing * in ip_wput_ire to the newly carved mp. */ if (DB_TYPE(xmit_mp) == M_DATA) xmit_mp->b_band = mp->b_band; } UNLOCK_IRE_FP_MP(ire); q = ire->ire_stq; BUMP_MIB(&ip_mib, ipFragCreates); out_ill = (ill_t *)q->q_ptr; DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, xmit_mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, out_ill, ipha, xmit_mp, mp); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, xmit_mp); if (xmit_mp != NULL) { putnext(q, xmit_mp); if (pkt_type != OB_PKT) { /* * Update the packet count of trailing * RTF_MULTIRT ires. */ UPDATE_OB_PKT_COUNT(ire); } } if (multirt_send) { /* * We are in a multiple send case; look for * the next ire and re-enter the loop. */ ASSERT(ire1); ASSERT(next_mp); /* REFRELE the current ire before looping */ ire_refrele(ire); ire = ire1; ire1 = NULL; mp = next_mp; next_mp = NULL; } } while (multirt_send); ASSERT(ire1 == NULL); /* Restore the original ire; we need it for the trailing frags */ if (save_ire != NULL) { /* REFRELE the last iterated ire */ ire_refrele(ire); /* save_ire has been REFHOLDed */ ire = save_ire; save_ire = NULL; q = ire->ire_stq; } if (pkt_type == OB_PKT) { UPDATE_OB_PKT_COUNT(ire); } else { UPDATE_IB_PKT_COUNT(ire); } /* Advance the offset to the second frag starting point. */ offset += len; /* * Update hdr_len from the copied header - there might be less options * in the later fragments. */ hdr_len = IPH_HDR_LENGTH(hdr_mp->b_rptr); /* Loop until done. */ for (;;) { uint16_t offset_and_flags; uint16_t ip_len; if (ip_data_end - offset > len) { /* * Carve off the appropriate amount from the original * datagram. */ if (!(carve_mp = ip_carve_mp(&mp_orig, len))) { mp = NULL; break; } /* * More frags after this one. Get another copy * of the header. */ if (carve_mp->b_datap->db_ref == 1 && hdr_mp->b_wptr - hdr_mp->b_rptr < carve_mp->b_rptr - carve_mp->b_datap->db_base) { /* Inline IP header */ carve_mp->b_rptr -= hdr_mp->b_wptr - hdr_mp->b_rptr; bcopy(hdr_mp->b_rptr, carve_mp->b_rptr, hdr_mp->b_wptr - hdr_mp->b_rptr); mp = carve_mp; } else { if (!(mp = copyb(hdr_mp))) { freemsg(carve_mp); break; } /* Get priority marking, if any. */ mp->b_band = carve_mp->b_band; mp->b_cont = carve_mp; } ipha = (ipha_t *)mp->b_rptr; offset_and_flags = IPH_MF; } else { /* * Last frag. Consume the header. Set len to * the length of this last piece. */ len = ip_data_end - offset; /* * Carve off the appropriate amount from the original * datagram. */ if (!(carve_mp = ip_carve_mp(&mp_orig, len))) { mp = NULL; break; } if (carve_mp->b_datap->db_ref == 1 && hdr_mp->b_wptr - hdr_mp->b_rptr < carve_mp->b_rptr - carve_mp->b_datap->db_base) { /* Inline IP header */ carve_mp->b_rptr -= hdr_mp->b_wptr - hdr_mp->b_rptr; bcopy(hdr_mp->b_rptr, carve_mp->b_rptr, hdr_mp->b_wptr - hdr_mp->b_rptr); mp = carve_mp; freeb(hdr_mp); hdr_mp = mp; } else { mp = hdr_mp; /* Get priority marking, if any. */ mp->b_band = carve_mp->b_band; mp->b_cont = carve_mp; } ipha = (ipha_t *)mp->b_rptr; /* A frag of a frag might have IPH_MF non-zero */ offset_and_flags = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_MF; } offset_and_flags |= (uint16_t)(offset >> 3); offset_and_flags |= (uint16_t)frag_flag; /* Store the offset and flags in the IP header. */ ipha->ipha_fragment_offset_and_flags = htons(offset_and_flags); /* Store the length in the IP header. */ ip_len = (uint16_t)(len + hdr_len); ipha->ipha_length = htons(ip_len); /* * Set the IP header checksum. Note that mp is just * the header, so this is easy to pass to ip_csum. */ ipha->ipha_hdr_checksum = ip_csum_hdr(ipha); /* Attach a transmit header, if any, and ship it. */ if (pkt_type == OB_PKT) { UPDATE_OB_PKT_COUNT(ire); } else { UPDATE_IB_PKT_COUNT(ire); } if (ire->ire_flags & RTF_MULTIRT) { irb = ire->ire_bucket; ASSERT(irb != NULL); multirt_send = B_TRUE; /* * Save the original ire; we will need to restore it * for the tailing frags. */ save_ire = ire; IRE_REFHOLD(save_ire); } /* * Emission loop for this fragment, similar * to what is done for the first fragment. */ do { if (multirt_send) { /* * We are in a multiple send case, need to get * the next ire and make a copy of the packet. */ ASSERT(irb != NULL); IRB_REFHOLD(irb); for (ire1 = ire->ire_next; ire1 != NULL; ire1 = ire1->ire_next) { if (!(ire1->ire_flags & RTF_MULTIRT)) continue; if (ire1->ire_addr != ire->ire_addr) continue; if (ire1->ire_marks & (IRE_MARK_CONDEMNED| IRE_MARK_HIDDEN)) continue; /* * Ensure we do not exceed the MTU * of the next route. */ if (ire1->ire_max_frag < max_frag) { ip_multirt_bad_mtu(ire1, max_frag); continue; } /* Got one. */ IRE_REFHOLD(ire1); break; } IRB_REFRELE(irb); if (ire1 != NULL) { next_mp = copyb(mp); if ((next_mp == NULL) || ((mp->b_cont != NULL) && ((next_mp->b_cont = dupmsg(mp->b_cont)) == NULL))) { freemsg(next_mp); next_mp = NULL; ire_refrele(ire1); ire1 = NULL; } } /* Last multiroute ire; don't loop anymore. */ if (ire1 == NULL) { multirt_send = B_FALSE; } } /* Update transmit header */ ll_hdr_len = 0; LOCK_IRE_FP_MP(ire); ll_hdr_mp = ire->ire_nce->nce_fp_mp; if (ll_hdr_mp != NULL) { ASSERT(ll_hdr_mp->b_datap->db_type == M_DATA); ll_hdr_len = MBLKL(ll_hdr_mp); } else { ll_hdr_mp = ire->ire_nce->nce_res_mp; } if (!ll_hdr_mp) { xmit_mp = mp; /* * We have link-layer header that can fit in * our mblk. */ } else if (mp->b_datap->db_ref == 1 && ll_hdr_len != 0 && ll_hdr_len <= mp->b_rptr - mp->b_datap->db_base) { /* M_DATA fastpath */ mp->b_rptr -= ll_hdr_len; bcopy(ll_hdr_mp->b_rptr, mp->b_rptr, ll_hdr_len); xmit_mp = mp; /* * Case of res_mp OR the fastpath mp can't fit * in the mblk */ } else if ((xmit_mp = copyb(ll_hdr_mp)) != NULL) { xmit_mp->b_cont = mp; if (DB_CRED(mp) != NULL) mblk_setcred(xmit_mp, DB_CRED(mp)); /* Get priority marking, if any. */ if (DB_TYPE(xmit_mp) == M_DATA) xmit_mp->b_band = mp->b_band; /* Corner case if copyb failed */ } else { /* * Exit both the replication and * fragmentation loops. */ UNLOCK_IRE_FP_MP(ire); goto drop_pkt; } UNLOCK_IRE_FP_MP(ire); BUMP_MIB(&ip_mib, ipFragCreates); mp1 = mp; out_ill = (ill_t *)q->q_ptr; DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha, mblk_t *, xmit_mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, out_ill, ipha, xmit_mp, mp); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, xmit_mp); if (mp != mp1 && hdr_mp == mp1) hdr_mp = mp; if (mp != mp1 && mp_orig == mp1) mp_orig = mp; if (xmit_mp != NULL) { putnext(q, xmit_mp); if (pkt_type != OB_PKT) { /* * Update the packet count of trailing * RTF_MULTIRT ires. */ UPDATE_OB_PKT_COUNT(ire); } } /* All done if we just consumed the hdr_mp. */ if (mp == hdr_mp) { last_frag = B_TRUE; } if (multirt_send) { /* * We are in a multiple send case; look for * the next ire and re-enter the loop. */ ASSERT(ire1); ASSERT(next_mp); /* REFRELE the current ire before looping */ ire_refrele(ire); ire = ire1; ire1 = NULL; q = ire->ire_stq; mp = next_mp; next_mp = NULL; } } while (multirt_send); /* * Restore the original ire; we need it for the * trailing frags */ if (save_ire != NULL) { ASSERT(ire1 == NULL); /* REFRELE the last iterated ire */ ire_refrele(ire); /* save_ire has been REFHOLDed */ ire = save_ire; q = ire->ire_stq; save_ire = NULL; } if (last_frag) { BUMP_MIB(&ip_mib, ipFragOKs); TRACE_1(TR_FAC_IP, TR_IP_WPUT_FRAG_END, "ip_wput_frag_end:(%S)", "consumed hdr_mp"); if (first_ire != NULL) ire_refrele(first_ire); return; } /* Otherwise, advance and loop. */ offset += len; } drop_pkt: /* Clean up following allocation failure. */ BUMP_MIB(&ip_mib, ipOutDiscards); freemsg(mp); if (mp != hdr_mp) freeb(hdr_mp); if (mp != mp_orig) freemsg(mp_orig); if (save_ire != NULL) IRE_REFRELE(save_ire); if (first_ire != NULL) ire_refrele(first_ire); TRACE_1(TR_FAC_IP, TR_IP_WPUT_FRAG_END, "ip_wput_frag_end:(%S)", "end--alloc failure"); } /* * Copy the header plus those options which have the copy bit set */ static mblk_t * ip_wput_frag_copyhdr(uchar_t *rptr, int hdr_len, int offset) { mblk_t *mp; uchar_t *up; /* * Quick check if we need to look for options without the copy bit * set */ mp = allocb(ip_wroff_extra + hdr_len, BPRI_HI); if (!mp) return (mp); mp->b_rptr += ip_wroff_extra; if (hdr_len == IP_SIMPLE_HDR_LENGTH || offset != 0) { bcopy(rptr, mp->b_rptr, hdr_len); mp->b_wptr += hdr_len + ip_wroff_extra; return (mp); } up = mp->b_rptr; bcopy(rptr, up, IP_SIMPLE_HDR_LENGTH); up += IP_SIMPLE_HDR_LENGTH; rptr += IP_SIMPLE_HDR_LENGTH; hdr_len -= IP_SIMPLE_HDR_LENGTH; while (hdr_len > 0) { uint32_t optval; uint32_t optlen; optval = *rptr; if (optval == IPOPT_EOL) break; if (optval == IPOPT_NOP) optlen = 1; else optlen = rptr[1]; if (optval & IPOPT_COPY) { bcopy(rptr, up, optlen); up += optlen; } rptr += optlen; hdr_len -= optlen; } /* * Make sure that we drop an even number of words by filling * with EOL to the next word boundary. */ for (hdr_len = up - (mp->b_rptr + IP_SIMPLE_HDR_LENGTH); hdr_len & 0x3; hdr_len++) *up++ = IPOPT_EOL; mp->b_wptr = up; /* Update header length */ mp->b_rptr[0] = (uint8_t)((IP_VERSION << 4) | ((up - mp->b_rptr) >> 2)); return (mp); } /* * Delivery to local recipients including fanout to multiple recipients. * Does not do checksumming of UDP/TCP. * Note: q should be the read side queue for either the ill or conn. * Note: rq should be the read side q for the lower (ill) stream. * We don't send packets to IPPF processing, thus the last argument * to all the fanout calls are B_FALSE. */ void ip_wput_local(queue_t *q, ill_t *ill, ipha_t *ipha, mblk_t *mp, ire_t *ire, int fanout_flags, zoneid_t zoneid) { uint32_t protocol; mblk_t *first_mp; boolean_t mctl_present; int ire_type; #define rptr ((uchar_t *)ipha) TRACE_1(TR_FAC_IP, TR_IP_WPUT_LOCAL_START, "ip_wput_local_start: q %p", q); if (ire != NULL) { ire_type = ire->ire_type; } else { /* * Only ip_multicast_loopback() calls us with a NULL ire. If the * packet is not multicast, we can't tell the ire type. */ ASSERT(CLASSD(ipha->ipha_dst)); ire_type = IRE_BROADCAST; } first_mp = mp; if (first_mp->b_datap->db_type == M_CTL) { ipsec_out_t *io = (ipsec_out_t *)first_mp->b_rptr; if (!io->ipsec_out_secure) { /* * This ipsec_out_t was allocated in ip_wput * for multicast packets to store the ill_index. * As this is being delivered locally, we don't * need this anymore. */ mp = first_mp->b_cont; freeb(first_mp); first_mp = mp; mctl_present = B_FALSE; } else { /* * Convert IPSEC_OUT to IPSEC_IN, preserving all * security properties for the looped-back packet. */ mctl_present = B_TRUE; mp = first_mp->b_cont; ASSERT(mp != NULL); ipsec_out_to_in(first_mp); } } else { mctl_present = B_FALSE; } DTRACE_PROBE4(ip4__loopback__in__start, ill_t *, ill, ill_t *, NULL, ipha_t *, ipha, mblk_t *, first_mp); FW_HOOKS(ip4_loopback_in_event, ipv4firewall_loopback_in, ill, NULL, ipha, first_mp, mp); DTRACE_PROBE1(ip4__loopback__in__end, mblk_t *, first_mp); if (first_mp == NULL) return; loopback_packets++; ip2dbg(("ip_wput_local: from 0x%x to 0x%x in zone %d\n", ntohl(ipha->ipha_src), ntohl(ipha->ipha_dst), zoneid)); if (!IS_SIMPLE_IPH(ipha)) { ip_wput_local_options(ipha); } protocol = ipha->ipha_protocol; switch (protocol) { case IPPROTO_ICMP: { ire_t *ire_zone; ilm_t *ilm; mblk_t *mp1; zoneid_t last_zoneid; if (CLASSD(ipha->ipha_dst) && !(ill->ill_phyint->phyint_flags & PHYI_LOOPBACK)) { ASSERT(ire_type == IRE_BROADCAST); /* * In the multicast case, applications may have joined * the group from different zones, so we need to deliver * the packet to each of them. Loop through the * multicast memberships structures (ilm) on the receive * ill and send a copy of the packet up each matching * one. However, we don't do this for multicasts sent on * the loopback interface (PHYI_LOOPBACK flag set) as * they must stay in the sender's zone. * * ilm_add_v6() ensures that ilms in the same zone are * contiguous in the ill_ilm list. We use this property * to avoid sending duplicates needed when two * applications in the same zone join the same group on * different logical interfaces: we ignore the ilm if * it's zoneid is the same as the last matching one. * In addition, the sending of the packet for * ire_zoneid is delayed until all of the other ilms * have been exhausted. */ last_zoneid = -1; ILM_WALKER_HOLD(ill); for (ilm = ill->ill_ilm; ilm != NULL; ilm = ilm->ilm_next) { if ((ilm->ilm_flags & ILM_DELETED) || ipha->ipha_dst != ilm->ilm_addr || ilm->ilm_zoneid == last_zoneid || ilm->ilm_zoneid == zoneid || !(ilm->ilm_ipif->ipif_flags & IPIF_UP)) continue; mp1 = ip_copymsg(first_mp); if (mp1 == NULL) continue; icmp_inbound(q, mp1, B_TRUE, ill, 0, 0, mctl_present, B_FALSE, ill, ilm->ilm_zoneid); last_zoneid = ilm->ilm_zoneid; } ILM_WALKER_RELE(ill); /* * Loopback case: the sending endpoint has * IP_MULTICAST_LOOP disabled, therefore we don't * dispatch the multicast packet to the sending zone. */ if (fanout_flags & IP_FF_NO_MCAST_LOOP) { freemsg(first_mp); return; } } else if (ire_type == IRE_BROADCAST) { /* * In the broadcast case, there may be many zones * which need a copy of the packet delivered to them. * There is one IRE_BROADCAST per broadcast address * and per zone; we walk those using a helper function. * In addition, the sending of the packet for zoneid is * delayed until all of the other ires have been * processed. */ IRB_REFHOLD(ire->ire_bucket); ire_zone = NULL; while ((ire_zone = ire_get_next_bcast_ire(ire_zone, ire)) != NULL) { mp1 = ip_copymsg(first_mp); if (mp1 == NULL) continue; UPDATE_IB_PKT_COUNT(ire_zone); ire_zone->ire_last_used_time = lbolt; icmp_inbound(q, mp1, B_TRUE, ill, 0, 0, mctl_present, B_FALSE, ill, ire_zone->ire_zoneid); } IRB_REFRELE(ire->ire_bucket); } icmp_inbound(q, first_mp, (ire_type == IRE_BROADCAST), ill, 0, 0, mctl_present, B_FALSE, ill, zoneid); TRACE_2(TR_FAC_IP, TR_IP_WPUT_LOCAL_END, "ip_wput_local_end: q %p (%S)", q, "icmp"); return; } case IPPROTO_IGMP: if ((mp = igmp_input(q, mp, ill)) == NULL) { /* Bad packet - discarded by igmp_input */ TRACE_2(TR_FAC_IP, TR_IP_WPUT_LOCAL_END, "ip_wput_local_end: q %p (%S)", q, "igmp_input--bad packet"); if (mctl_present) freeb(first_mp); return; } /* * igmp_input() may have returned the pulled up message. * So first_mp and ipha need to be reinitialized. */ ipha = (ipha_t *)mp->b_rptr; if (mctl_present) first_mp->b_cont = mp; else first_mp = mp; /* deliver to local raw users */ break; case IPPROTO_ENCAP: /* * This case is covered by either ip_fanout_proto, or by * the above security processing for self-tunneled packets. */ break; case IPPROTO_UDP: { uint16_t *up; uint32_t ports; up = (uint16_t *)(rptr + IPH_HDR_LENGTH(ipha) + UDP_PORTS_OFFSET); /* Force a 'valid' checksum. */ up[3] = 0; ports = *(uint32_t *)up; ip_fanout_udp(q, first_mp, ill, ipha, ports, (ire_type == IRE_BROADCAST), fanout_flags | IP_FF_SEND_ICMP | IP_FF_HDR_COMPLETE | IP_FF_SEND_SLLA | IP_FF_IP6INFO, mctl_present, B_FALSE, ill, zoneid); TRACE_2(TR_FAC_IP, TR_IP_WPUT_LOCAL_END, "ip_wput_local_end: q %p (%S)", q, "ip_fanout_udp"); return; } case IPPROTO_TCP: { /* * For TCP, discard broadcast packets. */ if ((ushort_t)ire_type == IRE_BROADCAST) { freemsg(first_mp); BUMP_MIB(&ip_mib, ipInDiscards); ip2dbg(("ip_wput_local: discard broadcast\n")); return; } if (mp->b_datap->db_type == M_DATA) { /* * M_DATA mblk, so init mblk (chain) for no struio(). */ mblk_t *mp1 = mp; do mp1->b_datap->db_struioflag = 0; while ((mp1 = mp1->b_cont) != NULL); } ASSERT((rptr + IPH_HDR_LENGTH(ipha) + TCP_PORTS_OFFSET + 4) <= mp->b_wptr); ip_fanout_tcp(q, first_mp, ill, ipha, fanout_flags | IP_FF_SEND_ICMP | IP_FF_HDR_COMPLETE | IP_FF_SYN_ADDIRE | IP_FF_IP6INFO, mctl_present, B_FALSE, zoneid); TRACE_2(TR_FAC_IP, TR_IP_WPUT_LOCAL_END, "ip_wput_local_end: q %p (%S)", q, "ip_fanout_tcp"); return; } case IPPROTO_SCTP: { uint32_t ports; bcopy(rptr + IPH_HDR_LENGTH(ipha), &ports, sizeof (ports)); ip_fanout_sctp(first_mp, ill, ipha, ports, fanout_flags | IP_FF_SEND_ICMP | IP_FF_HDR_COMPLETE | IP_FF_IP6INFO, mctl_present, B_FALSE, 0, zoneid); return; } default: break; } /* * Find a client for some other protocol. We give * copies to multiple clients, if more than one is * bound. */ ip_fanout_proto(q, first_mp, ill, ipha, fanout_flags | IP_FF_SEND_ICMP | IP_FF_HDR_COMPLETE | IP_FF_RAWIP, mctl_present, B_FALSE, ill, zoneid); TRACE_2(TR_FAC_IP, TR_IP_WPUT_LOCAL_END, "ip_wput_local_end: q %p (%S)", q, "ip_fanout_proto"); #undef rptr } /* * Update any source route, record route, or timestamp options. * Check that we are at end of strict source route. * The options have been sanity checked by ip_wput_options(). */ static void ip_wput_local_options(ipha_t *ipha) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; uint32_t ts; ire_t *ire; timestruc_t now; ip2dbg(("ip_wput_local_options\n")); for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ASSERT((opts.ipoptp_flags & IPOPTP_ERROR) == 0); switch (optval) { uint32_t off; case IPOPT_SSRR: case IPOPT_LSRR: off = opt[IPOPT_OFFSET]; off--; if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* End of source route */ break; } /* * This will only happen if two consecutive entries * in the source route contains our address or if * it is a packet with a loose source route which * reaches us before consuming the whole source route */ ip1dbg(("ip_wput_local_options: not end of SR\n")); if (optval == IPOPT_SSRR) { return; } /* * Hack: instead of dropping the packet truncate the * source route to what has been used by filling the * rest with IPOPT_NOP. */ opt[IPOPT_OLEN] = (uint8_t)off; while (off < optlen) { opt[off++] = IPOPT_NOP; } break; case IPOPT_RR: off = opt[IPOPT_OFFSET]; off--; if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* No more room - ignore */ ip1dbg(( "ip_wput_forward_options: end of RR\n")); break; } dst = htonl(INADDR_LOOPBACK); bcopy(&dst, (char *)opt + off, IP_ADDR_LEN); opt[IPOPT_OFFSET] += IP_ADDR_LEN; break; case IPOPT_TS: /* Insert timestamp if there is romm */ switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_TSONLY: off = IPOPT_TS_TIMELEN; break; case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: /* Verify that the address matched */ off = opt[IPOPT_OFFSET] - 1; bcopy((char *)opt + off, &dst, IP_ADDR_LEN); ire = ire_ctable_lookup(dst, 0, IRE_LOCAL, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE); if (ire == NULL) { /* Not for us */ break; } ire_refrele(ire); /* FALLTHRU */ case IPOPT_TS_TSANDADDR: off = IP_ADDR_LEN + IPOPT_TS_TIMELEN; break; default: /* * ip_*put_options should have already * dropped this packet. */ cmn_err(CE_PANIC, "ip_wput_local_options: " "unknown IT - bug in ip_wput_options?\n"); return; /* Keep "lint" happy */ } if (opt[IPOPT_OFFSET] - 1 + off > optlen) { /* Increase overflow counter */ off = (opt[IPOPT_POS_OV_FLG] >> 4) + 1; opt[IPOPT_POS_OV_FLG] = (uint8_t) (opt[IPOPT_POS_OV_FLG] & 0x0F) | (off << 4); break; } off = opt[IPOPT_OFFSET] - 1; switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: case IPOPT_TS_TSANDADDR: dst = htonl(INADDR_LOOPBACK); bcopy(&dst, (char *)opt + off, IP_ADDR_LEN); opt[IPOPT_OFFSET] += IP_ADDR_LEN; /* FALLTHRU */ case IPOPT_TS_TSONLY: off = opt[IPOPT_OFFSET] - 1; /* Compute # of milliseconds since midnight */ gethrestime(&now); ts = (now.tv_sec % (24 * 60 * 60)) * 1000 + now.tv_nsec / (NANOSEC / MILLISEC); bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN); opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN; break; } break; } } } /* * Send out a multicast packet on interface ipif. * The sender does not have an conn. * Caller verifies that this isn't a PHYI_LOOPBACK. */ void ip_wput_multicast(queue_t *q, mblk_t *mp, ipif_t *ipif, zoneid_t zoneid) { ipha_t *ipha; ire_t *ire; ipaddr_t dst; mblk_t *first_mp; /* igmp_sendpkt always allocates a ipsec_out_t */ ASSERT(mp->b_datap->db_type == M_CTL); ASSERT(!ipif->ipif_isv6); ASSERT(!(ipif->ipif_ill->ill_phyint->phyint_flags & PHYI_LOOPBACK)); first_mp = mp; mp = first_mp->b_cont; ASSERT(mp->b_datap->db_type == M_DATA); ipha = (ipha_t *)mp->b_rptr; /* * Find an IRE which matches the destination and the outgoing * queue (i.e. the outgoing interface.) */ if (ipif->ipif_flags & IPIF_POINTOPOINT) dst = ipif->ipif_pp_dst_addr; else dst = ipha->ipha_dst; /* * The source address has already been initialized by the * caller and hence matching on ILL (MATCH_IRE_ILL) would * be sufficient rather than MATCH_IRE_IPIF. * * This function is used for sending IGMP packets. We need * to make sure that we send the packet out of the interface * (ipif->ipif_ill) where we joined the group. This is to * prevent from switches doing IGMP snooping to send us multicast * packets for a given group on the interface we have joined. * If we can't find an ire, igmp_sendpkt has already initialized * ipsec_out_attach_if so that this will not be load spread in * ip_newroute_ipif. */ ire = ire_ctable_lookup(dst, 0, 0, ipif, zoneid, NULL, MATCH_IRE_ILL); if (!ire) { /* * Mark this packet to make it be delivered to * ip_wput_ire after the new ire has been * created. */ mp->b_prev = NULL; mp->b_next = NULL; ip_newroute_ipif(q, first_mp, ipif, dst, NULL, RTF_SETSRC, zoneid); return; } /* * Honor the RTF_SETSRC flag; this is the only case * where we force this addr whatever the current src addr is, * because this address is set by igmp_sendpkt(), and * cannot be specified by any user. */ if (ire->ire_flags & RTF_SETSRC) { ipha->ipha_src = ire->ire_src_addr; } ip_wput_ire(q, first_mp, ire, NULL, B_FALSE, zoneid); } /* * NOTE : This function does not ire_refrele the ire argument passed in. * * Copy the link layer header and do IPQoS if needed. Frees the mblk on * failure. The nce_fp_mp can vanish any time in the case of IRE_MIPRTUN * and IRE_BROADCAST due to DL_NOTE_FASTPATH_FLUSH. Hence we have to hold * the ire_lock to access the nce_fp_mp in this case. * IPQoS assumes that the first M_DATA contains the IP header. So, if we are * prepending a fastpath message IPQoS processing must precede it, we also set * the b_band of the fastpath message to that of the mblk returned by IPQoS * (IPQoS might have set the b_band for CoS marking). * However, if we are prepending DL_UNITDATA_REQ message, IPQoS processing * must follow it so that IPQoS can mark the dl_priority field for CoS * marking, if needed. */ static mblk_t * ip_wput_attach_llhdr(mblk_t *mp, ire_t *ire, ip_proc_t proc, uint32_t ill_index) { uint_t hlen; ipha_t *ipha; mblk_t *mp1; boolean_t qos_done = B_FALSE; uchar_t *ll_hdr; #define rptr ((uchar_t *)ipha) ipha = (ipha_t *)mp->b_rptr; hlen = 0; LOCK_IRE_FP_MP(ire); if ((mp1 = ire->ire_nce->nce_fp_mp) != NULL) { ASSERT(DB_TYPE(mp1) == M_DATA); /* Initiate IPPF processing */ if ((proc != 0) && IPP_ENABLED(proc)) { UNLOCK_IRE_FP_MP(ire); ip_process(proc, &mp, ill_index); if (mp == NULL) return (NULL); ipha = (ipha_t *)mp->b_rptr; LOCK_IRE_FP_MP(ire); if ((mp1 = ire->ire_nce->nce_fp_mp) == NULL) { qos_done = B_TRUE; goto no_fp_mp; } ASSERT(DB_TYPE(mp1) == M_DATA); } hlen = MBLKL(mp1); /* * Check if we have enough room to prepend fastpath * header */ if (hlen != 0 && (rptr - mp->b_datap->db_base) >= hlen) { ll_hdr = rptr - hlen; bcopy(mp1->b_rptr, ll_hdr, hlen); /* * Set the b_rptr to the start of the link layer * header */ mp->b_rptr = ll_hdr; mp1 = mp; } else { mp1 = copyb(mp1); if (mp1 == NULL) goto unlock_err; mp1->b_band = mp->b_band; mp1->b_cont = mp; /* * certain system generated traffic may not * have cred/label in ip header block. This * is true even for a labeled system. But for * labeled traffic, inherit the label in the * new header. */ if (DB_CRED(mp) != NULL) mblk_setcred(mp1, DB_CRED(mp)); /* * XXX disable ICK_VALID and compute checksum * here; can happen if nce_fp_mp changes and * it can't be copied now due to insufficient * space. (unlikely, fp mp can change, but it * does not increase in length) */ } UNLOCK_IRE_FP_MP(ire); } else { no_fp_mp: mp1 = copyb(ire->ire_nce->nce_res_mp); if (mp1 == NULL) { unlock_err: UNLOCK_IRE_FP_MP(ire); freemsg(mp); return (NULL); } UNLOCK_IRE_FP_MP(ire); mp1->b_cont = mp; /* * certain system generated traffic may not * have cred/label in ip header block. This * is true even for a labeled system. But for * labeled traffic, inherit the label in the * new header. */ if (DB_CRED(mp) != NULL) mblk_setcred(mp1, DB_CRED(mp)); if (!qos_done && (proc != 0) && IPP_ENABLED(proc)) { ip_process(proc, &mp1, ill_index); if (mp1 == NULL) return (NULL); } } return (mp1); #undef rptr } /* * Finish the outbound IPsec processing for an IPv6 packet. This function * is called from ipsec_out_process() if the IPsec packet was processed * synchronously, or from {ah,esp}_kcf_callback() if it was processed * asynchronously. */ void ip_wput_ipsec_out_v6(queue_t *q, mblk_t *ipsec_mp, ip6_t *ip6h, ill_t *ill, ire_t *ire_arg) { in6_addr_t *v6dstp; ire_t *ire; mblk_t *mp; ip6_t *ip6h1; uint_t ill_index; ipsec_out_t *io; boolean_t attach_if, hwaccel; uint32_t flags = IP6_NO_IPPOLICY; int match_flags; zoneid_t zoneid; boolean_t ill_need_rele = B_FALSE; boolean_t ire_need_rele = B_FALSE; mp = ipsec_mp->b_cont; ip6h1 = (ip6_t *)mp->b_rptr; io = (ipsec_out_t *)ipsec_mp->b_rptr; ill_index = io->ipsec_out_ill_index; if (io->ipsec_out_reachable) { flags |= IPV6_REACHABILITY_CONFIRMATION; } attach_if = io->ipsec_out_attach_if; hwaccel = io->ipsec_out_accelerated; zoneid = io->ipsec_out_zoneid; ASSERT(zoneid != ALL_ZONES); match_flags = MATCH_IRE_ILL_GROUP | MATCH_IRE_SECATTR; /* Multicast addresses should have non-zero ill_index. */ v6dstp = &ip6h->ip6_dst; ASSERT(ip6h->ip6_nxt != IPPROTO_RAW); ASSERT(!IN6_IS_ADDR_MULTICAST(v6dstp) || ill_index != 0); ASSERT(!attach_if || ill_index != 0); if (ill_index != 0) { if (ill == NULL) { ill = ip_grab_attach_ill(NULL, ipsec_mp, ill_index, B_TRUE); /* Failure case frees things for us. */ if (ill == NULL) return; ill_need_rele = B_TRUE; } /* * If this packet needs to go out on a particular interface * honor it. */ if (attach_if) { match_flags = MATCH_IRE_ILL; /* * Check if we need an ire that will not be * looked up by anybody else i.e. HIDDEN. */ if (ill_is_probeonly(ill)) { match_flags |= MATCH_IRE_MARK_HIDDEN; } } } ASSERT(mp != NULL); if (IN6_IS_ADDR_MULTICAST(v6dstp)) { boolean_t unspec_src; ipif_t *ipif; /* * Use the ill_index to get the right ill. */ unspec_src = io->ipsec_out_unspec_src; (void) ipif_lookup_zoneid(ill, zoneid, 0, &ipif); if (ipif == NULL) { if (ill_need_rele) ill_refrele(ill); freemsg(ipsec_mp); return; } if (ire_arg != NULL) { ire = ire_arg; } else { ire = ire_ctable_lookup_v6(v6dstp, 0, 0, ipif, zoneid, MBLK_GETLABEL(mp), match_flags); ire_need_rele = B_TRUE; } if (ire != NULL) { ipif_refrele(ipif); /* * XXX Do the multicast forwarding now, as the IPSEC * processing has been done. */ goto send; } ip0dbg(("ip_wput_ipsec_out_v6: multicast: IRE disappeared\n")); mp->b_prev = NULL; mp->b_next = NULL; /* * If the IPsec packet was processed asynchronously, * drop it now. */ if (q == NULL) { if (ill_need_rele) ill_refrele(ill); freemsg(ipsec_mp); return; } ip_newroute_ipif_v6(q, ipsec_mp, ipif, *v6dstp, unspec_src, zoneid); ipif_refrele(ipif); } else { if (attach_if) { ipif_t *ipif; ipif = ipif_get_next_ipif(NULL, ill); if (ipif == NULL) { if (ill_need_rele) ill_refrele(ill); freemsg(ipsec_mp); return; } ire = ire_ctable_lookup_v6(v6dstp, 0, 0, ipif, zoneid, MBLK_GETLABEL(mp), match_flags); ire_need_rele = B_TRUE; ipif_refrele(ipif); } else { if (ire_arg != NULL) { ire = ire_arg; } else { ire = ire_cache_lookup_v6(v6dstp, zoneid, NULL); ire_need_rele = B_TRUE; } } if (ire != NULL) goto send; /* * ire disappeared underneath. * * What we need to do here is the ip_newroute * logic to get the ire without doing the IPSEC * processing. Follow the same old path. But this * time, ip_wput or ire_add_then_send will call us * directly as all the IPSEC operations are done. */ ip1dbg(("ip_wput_ipsec_out_v6: IRE disappeared\n")); mp->b_prev = NULL; mp->b_next = NULL; /* * If the IPsec packet was processed asynchronously, * drop it now. */ if (q == NULL) { if (ill_need_rele) ill_refrele(ill); freemsg(ipsec_mp); return; } ip_newroute_v6(q, ipsec_mp, v6dstp, &ip6h->ip6_src, ill, zoneid); } if (ill != NULL && ill_need_rele) ill_refrele(ill); return; send: if (ill != NULL && ill_need_rele) ill_refrele(ill); /* Local delivery */ if (ire->ire_stq == NULL) { ill_t *out_ill; ASSERT(q != NULL); /* PFHooks: LOOPBACK_OUT */ out_ill = ire->ire_ipif->ipif_ill; DTRACE_PROBE4(ip6__loopback__out__start, ill_t *, NULL, ill_t *, out_ill, ip6_t *, ip6h1, mblk_t *, ipsec_mp); FW_HOOKS6(ip6_loopback_out_event, ipv6firewall_loopback_out, NULL, out_ill, ip6h1, ipsec_mp, mp); DTRACE_PROBE1(ip6__loopback__out__end, mblk_t *, ipsec_mp); if (ipsec_mp != NULL) ip_wput_local_v6(RD(q), out_ill, ip6h, ipsec_mp, ire, 0); if (ire_need_rele) ire_refrele(ire); return; } /* * Everything is done. Send it out on the wire. * We force the insertion of a fragment header using the * IPH_FRAG_HDR flag in two cases: * - after reception of an ICMPv6 "packet too big" message * with a MTU < 1280 (cf. RFC 2460 section 5) * - for multirouted IPv6 packets, so that the receiver can * discard duplicates according to their fragment identifier */ /* XXX fix flow control problems. */ if (ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN > ire->ire_max_frag || (ire->ire_frag_flag & IPH_FRAG_HDR)) { if (hwaccel) { /* * hardware acceleration does not handle these * "slow path" cases. */ /* IPsec KSTATS: should bump bean counter here. */ if (ire_need_rele) ire_refrele(ire); freemsg(ipsec_mp); return; } if (ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN != (mp->b_cont ? msgdsize(mp) : mp->b_wptr - (uchar_t *)ip6h)) { /* IPsec KSTATS: should bump bean counter here. */ ip0dbg(("Packet length mismatch: %d, %ld\n", ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN, msgdsize(mp))); if (ire_need_rele) ire_refrele(ire); freemsg(ipsec_mp); return; } ASSERT(mp->b_prev == NULL); ip2dbg(("Fragmenting Size = %d, mtu = %d\n", ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN, ire->ire_max_frag)); ip_wput_frag_v6(mp, ire, flags, NULL, B_FALSE, ire->ire_max_frag); } else { UPDATE_OB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; ip_xmit_v6(mp, ire, flags, NULL, B_FALSE, hwaccel ? io : NULL); } if (ire_need_rele) ire_refrele(ire); freeb(ipsec_mp); } void ipsec_hw_putnext(queue_t *q, mblk_t *mp) { mblk_t *hada_mp; /* attributes M_CTL mblk */ da_ipsec_t *hada; /* data attributes */ ill_t *ill = (ill_t *)q->q_ptr; IPSECHW_DEBUG(IPSECHW_PKT, ("ipsec_hw_putnext: accelerated packet\n")); if ((ill->ill_capabilities & (ILL_CAPAB_AH | ILL_CAPAB_ESP)) == 0) { /* IPsec KSTATS: Bump lose counter here! */ freemsg(mp); return; } /* * It's an IPsec packet that must be * accelerated by the Provider, and the * outbound ill is IPsec acceleration capable. * Prepends the mblk with an IPHADA_M_CTL, and ship it * to the ill. * IPsec KSTATS: should bump packet counter here. */ hada_mp = allocb(sizeof (da_ipsec_t), BPRI_HI); if (hada_mp == NULL) { /* IPsec KSTATS: should bump packet counter here. */ freemsg(mp); return; } hada_mp->b_datap->db_type = M_CTL; hada_mp->b_wptr = hada_mp->b_rptr + sizeof (*hada); hada_mp->b_cont = mp; hada = (da_ipsec_t *)hada_mp->b_rptr; bzero(hada, sizeof (da_ipsec_t)); hada->da_type = IPHADA_M_CTL; putnext(q, hada_mp); } /* * Finish the outbound IPsec processing. This function is called from * ipsec_out_process() if the IPsec packet was processed * synchronously, or from {ah,esp}_kcf_callback() if it was processed * asynchronously. */ void ip_wput_ipsec_out(queue_t *q, mblk_t *ipsec_mp, ipha_t *ipha, ill_t *ill, ire_t *ire_arg) { uint32_t v_hlen_tos_len; ipaddr_t dst; ipif_t *ipif = NULL; ire_t *ire; ire_t *ire1 = NULL; mblk_t *next_mp = NULL; uint32_t max_frag; boolean_t multirt_send = B_FALSE; mblk_t *mp; mblk_t *mp1; ipha_t *ipha1; uint_t ill_index; ipsec_out_t *io; boolean_t attach_if; int match_flags, offset; irb_t *irb = NULL; boolean_t ill_need_rele = B_FALSE, ire_need_rele = B_TRUE; zoneid_t zoneid; uint32_t cksum; uint16_t *up; ipxmit_state_t pktxmit_state; #ifdef _BIG_ENDIAN #define LENGTH (v_hlen_tos_len & 0xFFFF) #else #define LENGTH ((v_hlen_tos_len >> 24) | ((v_hlen_tos_len >> 8) & 0xFF00)) #endif mp = ipsec_mp->b_cont; ipha1 = (ipha_t *)mp->b_rptr; ASSERT(mp != NULL); v_hlen_tos_len = ((uint32_t *)ipha)[0]; dst = ipha->ipha_dst; io = (ipsec_out_t *)ipsec_mp->b_rptr; ill_index = io->ipsec_out_ill_index; attach_if = io->ipsec_out_attach_if; zoneid = io->ipsec_out_zoneid; ASSERT(zoneid != ALL_ZONES); match_flags = MATCH_IRE_ILL_GROUP | MATCH_IRE_SECATTR; if (ill_index != 0) { if (ill == NULL) { ill = ip_grab_attach_ill(NULL, ipsec_mp, ill_index, B_FALSE); /* Failure case frees things for us. */ if (ill == NULL) return; ill_need_rele = B_TRUE; } /* * If this packet needs to go out on a particular interface * honor it. */ if (attach_if) { match_flags = MATCH_IRE_ILL | MATCH_IRE_SECATTR; /* * Check if we need an ire that will not be * looked up by anybody else i.e. HIDDEN. */ if (ill_is_probeonly(ill)) { match_flags |= MATCH_IRE_MARK_HIDDEN; } } } if (CLASSD(dst)) { boolean_t conn_dontroute; /* * Use the ill_index to get the right ipif. */ conn_dontroute = io->ipsec_out_dontroute; if (ill_index == 0) ipif = ipif_lookup_group(dst, zoneid); else (void) ipif_lookup_zoneid(ill, zoneid, 0, &ipif); if (ipif == NULL) { ip1dbg(("ip_wput_ipsec_out: No ipif for" " multicast\n")); BUMP_MIB(&ip_mib, ipOutNoRoutes); freemsg(ipsec_mp); goto done; } /* * ipha_src has already been intialized with the * value of the ipif in ip_wput. All we need now is * an ire to send this downstream. */ ire = ire_ctable_lookup(dst, 0, 0, ipif, zoneid, MBLK_GETLABEL(mp), match_flags); if (ire != NULL) { ill_t *ill1; /* * Do the multicast forwarding now, as the IPSEC * processing has been done. */ if (ip_g_mrouter && !conn_dontroute && (ill1 = ire_to_ill(ire))) { if (ip_mforward(ill1, ipha, mp)) { freemsg(ipsec_mp); ip1dbg(("ip_wput_ipsec_out: mforward " "failed\n")); ire_refrele(ire); goto done; } } goto send; } ip0dbg(("ip_wput_ipsec_out: multicast: IRE disappeared\n")); mp->b_prev = NULL; mp->b_next = NULL; /* * If the IPsec packet was processed asynchronously, * drop it now. */ if (q == NULL) { freemsg(ipsec_mp); goto done; } /* * We may be using a wrong ipif to create the ire. * But it is okay as the source address is assigned * for the packet already. Next outbound packet would * create the IRE with the right IPIF in ip_wput. * * Also handle RTF_MULTIRT routes. */ ip_newroute_ipif(q, ipsec_mp, ipif, dst, NULL, RTF_MULTIRT, zoneid); } else { if (attach_if) { ire = ire_ctable_lookup(dst, 0, 0, ill->ill_ipif, zoneid, MBLK_GETLABEL(mp), match_flags); } else { if (ire_arg != NULL) { ire = ire_arg; ire_need_rele = B_FALSE; } else { ire = ire_cache_lookup(dst, zoneid, MBLK_GETLABEL(mp)); } } if (ire != NULL) { goto send; } /* * ire disappeared underneath. * * What we need to do here is the ip_newroute * logic to get the ire without doing the IPSEC * processing. Follow the same old path. But this * time, ip_wput or ire_add_then_put will call us * directly as all the IPSEC operations are done. */ ip1dbg(("ip_wput_ipsec_out: IRE disappeared\n")); mp->b_prev = NULL; mp->b_next = NULL; /* * If the IPsec packet was processed asynchronously, * drop it now. */ if (q == NULL) { freemsg(ipsec_mp); goto done; } /* * Since we're going through ip_newroute() again, we * need to make sure we don't: * * 1.) Trigger the ASSERT() with the ipha_ident * overloading. * 2.) Redo transport-layer checksumming, since we've * already done all that to get this far. * * The easiest way not do either of the above is to set * the ipha_ident field to IP_HDR_INCLUDED. */ ipha->ipha_ident = IP_HDR_INCLUDED; ip_newroute(q, ipsec_mp, dst, NULL, (CONN_Q(q) ? Q_TO_CONN(q) : NULL), zoneid); } goto done; send: if (ipha->ipha_protocol == IPPROTO_UDP && udp_compute_checksum()) { /* * ESP NAT-Traversal packet. * * Just do software checksum for now. */ offset = IP_SIMPLE_HDR_LENGTH + UDP_CHECKSUM_OFFSET; IP_STAT(ip_out_sw_cksum); IP_STAT_UPDATE(ip_udp_out_sw_cksum_bytes, ntohs(htons(ipha->ipha_length) - IP_SIMPLE_HDR_LENGTH)); #define iphs ((uint16_t *)ipha) cksum = IP_UDP_CSUM_COMP + iphs[6] + iphs[7] + iphs[8] + iphs[9] + ntohs(htons(ipha->ipha_length) - IP_SIMPLE_HDR_LENGTH); #undef iphs if ((cksum = IP_CSUM(mp, IP_SIMPLE_HDR_LENGTH, cksum)) == 0) cksum = 0xFFFF; for (mp1 = mp; mp1 != NULL; mp1 = mp1->b_cont) if (mp1->b_wptr - mp1->b_rptr >= offset + sizeof (uint16_t)) { up = (uint16_t *)(mp1->b_rptr + offset); *up = cksum; break; /* out of for loop */ } else { offset -= (mp->b_wptr - mp->b_rptr); } } /* Otherwise, just keep the all-zero checksum. */ if (ire->ire_stq == NULL) { ill_t *out_ill; /* * Loopbacks go through ip_wput_local except for one case. * We come here if we generate a icmp_frag_needed message * after IPSEC processing is over. When this function calls * ip_wput_ire_fragmentit, ip_wput_frag might end up calling * icmp_frag_needed. The message generated comes back here * through icmp_frag_needed -> icmp_pkt -> ip_wput -> * ipsec_out_process -> ip_wput_ipsec_out. We need to set the * source address as it is usually set in ip_wput_ire. As * ipsec_out_proc_begin is set, ip_wput calls ipsec_out_process * and we end up here. We can't enter ip_wput_ire once the * IPSEC processing is over and hence we need to do it here. */ ASSERT(q != NULL); UPDATE_OB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; if (ipha->ipha_src == 0) ipha->ipha_src = ire->ire_src_addr; /* PFHooks: LOOPBACK_OUT */ out_ill = ire->ire_ipif->ipif_ill; DTRACE_PROBE4(ip4__loopback__out__start, ill_t *, NULL, ill_t *, out_ill, ipha_t *, ipha1, mblk_t *, ipsec_mp); FW_HOOKS(ip4_loopback_out_event, ipv4firewall_loopback_out, NULL, out_ill, ipha1, ipsec_mp, mp); DTRACE_PROBE1(ip4__loopback__out__end, mblk_t *, ipsec_mp); if (ipsec_mp != NULL) ip_wput_local(RD(q), out_ill, ipha, ipsec_mp, ire, 0, zoneid); if (ire_need_rele) ire_refrele(ire); goto done; } if (ire->ire_max_frag < (unsigned int)LENGTH) { /* * We are through with IPSEC processing. * Fragment this and send it on the wire. */ if (io->ipsec_out_accelerated) { /* * The packet has been accelerated but must * be fragmented. This should not happen * since AH and ESP must not accelerate * packets that need fragmentation, however * the configuration could have changed * since the AH or ESP processing. * Drop packet. * IPsec KSTATS: bump bean counter here. */ IPSECHW_DEBUG(IPSECHW_PKT, ("ipsec_wput_ipsec_out: " "fragmented accelerated packet!\n")); freemsg(ipsec_mp); } else { ip_wput_ire_fragmentit(ipsec_mp, ire, zoneid); } if (ire_need_rele) ire_refrele(ire); goto done; } ip2dbg(("ip_wput_ipsec_out: ipsec_mp %p, ire %p, ire_ipif %p, " "ipif %p\n", (void *)ipsec_mp, (void *)ire, (void *)ire->ire_ipif, (void *)ipif)); /* * Multiroute the secured packet, unless IPsec really * requires the packet to go out only through a particular * interface. */ if ((ire->ire_flags & RTF_MULTIRT) && !attach_if) { ire_t *first_ire; irb = ire->ire_bucket; ASSERT(irb != NULL); /* * This ire has been looked up as the one that * goes through the given ipif; * make sure we do not omit any other multiroute ire * that may be present in the bucket before this one. */ IRB_REFHOLD(irb); for (first_ire = irb->irb_ire; first_ire != NULL; first_ire = first_ire->ire_next) { if ((first_ire->ire_flags & RTF_MULTIRT) && (first_ire->ire_addr == ire->ire_addr) && !(first_ire->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN))) break; } if ((first_ire != NULL) && (first_ire != ire)) { /* * Don't change the ire if the packet must * be fragmented if sent via this new one. */ if (first_ire->ire_max_frag >= (unsigned int)LENGTH) { IRE_REFHOLD(first_ire); if (ire_need_rele) ire_refrele(ire); else ire_need_rele = B_TRUE; ire = first_ire; } } IRB_REFRELE(irb); multirt_send = B_TRUE; max_frag = ire->ire_max_frag; } else { if ((ire->ire_flags & RTF_MULTIRT) && attach_if) { ip1dbg(("ip_wput_ipsec_out: ignoring multirouting " "flag, attach_if %d\n", attach_if)); } } /* * In most cases, the emission loop below is entered only once. * Only in the case where the ire holds the RTF_MULTIRT * flag, we loop to process all RTF_MULTIRT ires in the * bucket, and send the packet through all crossed * RTF_MULTIRT routes. */ do { if (multirt_send) { /* * ire1 holds here the next ire to process in the * bucket. If multirouting is expected, * any non-RTF_MULTIRT ire that has the * right destination address is ignored. */ ASSERT(irb != NULL); IRB_REFHOLD(irb); for (ire1 = ire->ire_next; ire1 != NULL; ire1 = ire1->ire_next) { if ((ire1->ire_flags & RTF_MULTIRT) == 0) continue; if (ire1->ire_addr != ire->ire_addr) continue; if (ire1->ire_marks & (IRE_MARK_CONDEMNED | IRE_MARK_HIDDEN)) continue; /* No loopback here */ if (ire1->ire_stq == NULL) continue; /* * Ensure we do not exceed the MTU * of the next route. */ if (ire1->ire_max_frag < (unsigned int)LENGTH) { ip_multirt_bad_mtu(ire1, max_frag); continue; } IRE_REFHOLD(ire1); break; } IRB_REFRELE(irb); if (ire1 != NULL) { /* * We are in a multiple send case, need to * make a copy of the packet. */ next_mp = copymsg(ipsec_mp); if (next_mp == NULL) { ire_refrele(ire1); ire1 = NULL; } } } /* * Everything is done. Send it out on the wire * * ip_xmit_v4 will call ip_wput_attach_llhdr and then * either send it on the wire or, in the case of * HW acceleration, call ipsec_hw_putnext. */ if (ire->ire_nce && ire->ire_nce->nce_state != ND_REACHABLE) { DTRACE_PROBE2(ip__wput__ipsec__bail, (ire_t *), ire, (mblk_t *), ipsec_mp); /* * If ire's link-layer is unresolved (this * would only happen if the incomplete ire * was added to cachetable via forwarding path) * don't bother going to ip_xmit_v4. Just drop the * packet. * There is a slight risk here, in that, if we * have the forwarding path create an incomplete * IRE, then until the IRE is completed, any * transmitted IPSEC packets will be dropped * instead of being queued waiting for resolution. * * But the likelihood of a forwarding packet and a wput * packet sending to the same dst at the same time * and there not yet be an ARP entry for it is small. * Furthermore, if this actually happens, it might * be likely that wput would generate multiple * packets (and forwarding would also have a train * of packets) for that destination. If this is * the case, some of them would have been dropped * anyway, since ARP only queues a few packets while * waiting for resolution * * NOTE: We should really call ip_xmit_v4, * and let it queue the packet and send the * ARP query and have ARP come back thus: * ip_wput->ip_output->ip-wput_nondata-> * ip_xmit_v4->ip_wput_attach_llhdr + ipsec * hw accel work. But it's too complex to get * the IPsec hw acceleration approach to fit * well with ip_xmit_v4 doing ARP without * doing IPSEC simplification. For now, we just * poke ip_xmit_v4 to trigger the arp resolve, so * that we can continue with the send on the next * attempt. * * XXX THis should be revisited, when * the IPsec/IP interaction is cleaned up */ ip1dbg(("ip_wput_ipsec_out: ire is incomplete" " - dropping packet\n")); freemsg(ipsec_mp); /* * Call ip_xmit_v4() to trigger ARP query * in case the nce_state is ND_INITIAL */ (void) ip_xmit_v4(NULL, ire, NULL, B_FALSE); goto drop_pkt; } DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, ire->ire_ipif->ipif_ill, ipha_t *, ipha1, mblk_t *, mp); FW_HOOKS(ip4_physical_out_event, ipv4firewall_physical_out, NULL, ire->ire_ipif->ipif_ill, ipha1, mp, mp); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp == NULL) goto drop_pkt; ip1dbg(("ip_wput_ipsec_out: calling ip_xmit_v4\n")); pktxmit_state = ip_xmit_v4(mp, ire, (io->ipsec_out_accelerated ? io : NULL), B_FALSE); if ((pktxmit_state == SEND_FAILED) || (pktxmit_state == LLHDR_RESLV_FAILED)) { freeb(ipsec_mp); /* ip_xmit_v4 frees the mp */ drop_pkt: BUMP_MIB(&ip_mib, ipOutDiscards); if (ire_need_rele) ire_refrele(ire); if (ire1 != NULL) { ire_refrele(ire1); freemsg(next_mp); } goto done; } freeb(ipsec_mp); if (ire_need_rele) ire_refrele(ire); if (ire1 != NULL) { ire = ire1; ire_need_rele = B_TRUE; ASSERT(next_mp); ipsec_mp = next_mp; mp = ipsec_mp->b_cont; ire1 = NULL; next_mp = NULL; io = (ipsec_out_t *)ipsec_mp->b_rptr; } else { multirt_send = B_FALSE; } } while (multirt_send); done: if (ill != NULL && ill_need_rele) ill_refrele(ill); if (ipif != NULL) ipif_refrele(ipif); } /* * Get the ill corresponding to the specified ire, and compare its * capabilities with the protocol and algorithms specified by the * the SA obtained from ipsec_out. If they match, annotate the * ipsec_out structure to indicate that the packet needs acceleration. * * * A packet is eligible for outbound hardware acceleration if the * following conditions are satisfied: * * 1. the packet will not be fragmented * 2. the provider supports the algorithm * 3. there is no pending control message being exchanged * 4. snoop is not attached * 5. the destination address is not a broadcast or multicast address. * * Rationale: * - Hardware drivers do not support fragmentation with * the current interface. * - snoop, multicast, and broadcast may result in exposure of * a cleartext datagram. * We check all five of these conditions here. * * XXX would like to nuke "ire_t *" parameter here; problem is that * IRE is only way to figure out if a v4 address is a broadcast and * thus ineligible for acceleration... */ static void ipsec_out_is_accelerated(mblk_t *ipsec_mp, ipsa_t *sa, ill_t *ill, ire_t *ire) { ipsec_out_t *io; mblk_t *data_mp; uint_t plen, overhead; if ((sa->ipsa_flags & IPSA_F_HW) == 0) return; if (ill == NULL) return; /* * Destination address is a broadcast or multicast. Punt. */ if ((ire != NULL) && (ire->ire_type & (IRE_BROADCAST|IRE_LOOPBACK| IRE_LOCAL))) return; data_mp = ipsec_mp->b_cont; if (ill->ill_isv6) { ip6_t *ip6h = (ip6_t *)data_mp->b_rptr; if (IN6_IS_ADDR_MULTICAST(&ip6h->ip6_dst)) return; plen = ip6h->ip6_plen; } else { ipha_t *ipha = (ipha_t *)data_mp->b_rptr; if (CLASSD(ipha->ipha_dst)) return; plen = ipha->ipha_length; } /* * Is there a pending DLPI control message being exchanged * between IP/IPsec and the DLS Provider? If there is, it * could be a SADB update, and the state of the DLS Provider * SADB might not be in sync with the SADB maintained by * IPsec. To avoid dropping packets or using the wrong keying * material, we do not accelerate this packet. */ if (ill->ill_dlpi_pending != DL_PRIM_INVAL) { IPSECHW_DEBUG(IPSECHW_PKT, ("ipsec_out_check_is_accelerated: " "ill_dlpi_pending! don't accelerate packet\n")); return; } /* * Is the Provider in promiscous mode? If it does, we don't * accelerate the packet since it will bounce back up to the * listeners in the clear. */ if (ill->ill_promisc_on_phys) { IPSECHW_DEBUG(IPSECHW_PKT, ("ipsec_out_check_is_accelerated: " "ill in promiscous mode, don't accelerate packet\n")); return; } /* * Will the packet require fragmentation? */ /* * IPsec ESP note: this is a pessimistic estimate, but the same * as is used elsewhere. * SPI + sequence + MAC + IV(blocksize) + padding(blocksize-1) * + 2-byte trailer */ overhead = (sa->ipsa_type == SADB_SATYPE_AH) ? IPSEC_MAX_AH_HDR_SIZE : IPSEC_BASE_ESP_HDR_SIZE(sa); if ((plen + overhead) > ill->ill_max_mtu) return; io = (ipsec_out_t *)ipsec_mp->b_rptr; /* * Can the ill accelerate this IPsec protocol and algorithm * specified by the SA? */ if (!ipsec_capab_match(ill, io->ipsec_out_capab_ill_index, ill->ill_isv6, sa)) { return; } /* * Tell AH or ESP that the outbound ill is capable of * accelerating this packet. */ io->ipsec_out_is_capab_ill = B_TRUE; } /* * Select which AH & ESP SA's to use (if any) for the outbound packet. * * If this function returns B_TRUE, the requested SA's have been filled * into the ipsec_out_*_sa pointers. * * If the function returns B_FALSE, the packet has been "consumed", most * likely by an ACQUIRE sent up via PF_KEY to a key management daemon. * * The SA references created by the protocol-specific "select" * function will be released when the ipsec_mp is freed, thanks to the * ipsec_out_free destructor -- see spd.c. */ static boolean_t ipsec_out_select_sa(mblk_t *ipsec_mp) { boolean_t need_ah_acquire = B_FALSE, need_esp_acquire = B_FALSE; ipsec_out_t *io; ipsec_policy_t *pp; ipsec_action_t *ap; io = (ipsec_out_t *)ipsec_mp->b_rptr; ASSERT(io->ipsec_out_type == IPSEC_OUT); ASSERT(io->ipsec_out_len == sizeof (ipsec_out_t)); if (!io->ipsec_out_secure) { /* * We came here by mistake. * Don't bother with ipsec processing * We should "discourage" this path in the future. */ ASSERT(io->ipsec_out_proc_begin == B_FALSE); return (B_FALSE); } ASSERT(io->ipsec_out_need_policy == B_FALSE); ASSERT((io->ipsec_out_policy != NULL) || (io->ipsec_out_act != NULL)); ASSERT(io->ipsec_out_failed == B_FALSE); /* * IPSEC processing has started. */ io->ipsec_out_proc_begin = B_TRUE; ap = io->ipsec_out_act; if (ap == NULL) { pp = io->ipsec_out_policy; ASSERT(pp != NULL); ap = pp->ipsp_act; ASSERT(ap != NULL); } /* * We have an action. now, let's select SA's. * (In the future, we can cache this in the conn_t..) */ if (ap->ipa_want_esp) { if (io->ipsec_out_esp_sa == NULL) { need_esp_acquire = !ipsec_outbound_sa(ipsec_mp, IPPROTO_ESP); } ASSERT(need_esp_acquire || io->ipsec_out_esp_sa != NULL); } if (ap->ipa_want_ah) { if (io->ipsec_out_ah_sa == NULL) { need_ah_acquire = !ipsec_outbound_sa(ipsec_mp, IPPROTO_AH); } ASSERT(need_ah_acquire || io->ipsec_out_ah_sa != NULL); /* * The ESP and AH processing order needs to be preserved * when both protocols are required (ESP should be applied * before AH for an outbound packet). Force an ESP ACQUIRE * when both ESP and AH are required, and an AH ACQUIRE * is needed. */ if (ap->ipa_want_esp && need_ah_acquire) need_esp_acquire = B_TRUE; } /* * Send an ACQUIRE (extended, regular, or both) if we need one. * Release SAs that got referenced, but will not be used until we * acquire _all_ of the SAs we need. */ if (need_ah_acquire || need_esp_acquire) { if (io->ipsec_out_ah_sa != NULL) { IPSA_REFRELE(io->ipsec_out_ah_sa); io->ipsec_out_ah_sa = NULL; } if (io->ipsec_out_esp_sa != NULL) { IPSA_REFRELE(io->ipsec_out_esp_sa); io->ipsec_out_esp_sa = NULL; } sadb_acquire(ipsec_mp, io, need_ah_acquire, need_esp_acquire); return (B_FALSE); } return (B_TRUE); } /* * Process an IPSEC_OUT message and see what you can * do with it. * IPQoS Notes: * We do IPPF processing if IPP_LOCAL_OUT is enabled before processing for * IPSec. * XXX would like to nuke ire_t. * XXX ill_index better be "real" */ void ipsec_out_process(queue_t *q, mblk_t *ipsec_mp, ire_t *ire, uint_t ill_index) { ipsec_out_t *io; ipsec_policy_t *pp; ipsec_action_t *ap; ipha_t *ipha; ip6_t *ip6h; mblk_t *mp; ill_t *ill; zoneid_t zoneid; ipsec_status_t ipsec_rc; boolean_t ill_need_rele = B_FALSE; io = (ipsec_out_t *)ipsec_mp->b_rptr; ASSERT(io->ipsec_out_type == IPSEC_OUT); ASSERT(io->ipsec_out_len == sizeof (ipsec_out_t)); mp = ipsec_mp->b_cont; /* * Initiate IPPF processing. We do it here to account for packets * coming here that don't have any policy (i.e. !io->ipsec_out_secure). * We can check for ipsec_out_proc_begin even for such packets, as * they will always be false (asserted below). */ if (IPP_ENABLED(IPP_LOCAL_OUT) && !io->ipsec_out_proc_begin) { ip_process(IPP_LOCAL_OUT, &mp, io->ipsec_out_ill_index != 0 ? io->ipsec_out_ill_index : ill_index); if (mp == NULL) { ip2dbg(("ipsec_out_process: packet dropped "\ "during IPPF processing\n")); freeb(ipsec_mp); BUMP_MIB(&ip_mib, ipOutDiscards); return; } } if (!io->ipsec_out_secure) { /* * We came here by mistake. * Don't bother with ipsec processing * Should "discourage" this path in the future. */ ASSERT(io->ipsec_out_proc_begin == B_FALSE); goto done; } ASSERT(io->ipsec_out_need_policy == B_FALSE); ASSERT((io->ipsec_out_policy != NULL) || (io->ipsec_out_act != NULL)); ASSERT(io->ipsec_out_failed == B_FALSE); if (!ipsec_loaded()) { ipha = (ipha_t *)ipsec_mp->b_cont->b_rptr; if (IPH_HDR_VERSION(ipha) == IP_VERSION) { BUMP_MIB(&ip_mib, ipOutDiscards); } else { BUMP_MIB(&ip6_mib, ipv6OutDiscards); } ip_drop_packet(ipsec_mp, B_FALSE, NULL, ire, &ipdrops_ip_ipsec_not_loaded, &ip_dropper); return; } /* * IPSEC processing has started. */ io->ipsec_out_proc_begin = B_TRUE; ap = io->ipsec_out_act; if (ap == NULL) { pp = io->ipsec_out_policy; ASSERT(pp != NULL); ap = pp->ipsp_act; ASSERT(ap != NULL); } /* * Save the outbound ill index. When the packet comes back * from IPsec, we make sure the ill hasn't changed or disappeared * before sending it the accelerated packet. */ if ((ire != NULL) && (io->ipsec_out_capab_ill_index == 0)) { int ifindex; ill = ire_to_ill(ire); ifindex = ill->ill_phyint->phyint_ifindex; io->ipsec_out_capab_ill_index = ifindex; } /* * The order of processing is first insert a IP header if needed. * Then insert the ESP header and then the AH header. */ if ((io->ipsec_out_se_done == B_FALSE) && (ap->ipa_want_se)) { /* * First get the outer IP header before sending * it to ESP. */ ipha_t *oipha, *iipha; mblk_t *outer_mp, *inner_mp; if ((outer_mp = allocb(sizeof (ipha_t), BPRI_HI)) == NULL) { (void) mi_strlog(q, 0, SL_ERROR|SL_TRACE|SL_CONSOLE, "ipsec_out_process: " "Self-Encapsulation failed: Out of memory\n"); freemsg(ipsec_mp); BUMP_MIB(&ip_mib, ipOutDiscards); return; } inner_mp = ipsec_mp->b_cont; ASSERT(inner_mp->b_datap->db_type == M_DATA); oipha = (ipha_t *)outer_mp->b_rptr; iipha = (ipha_t *)inner_mp->b_rptr; *oipha = *iipha; outer_mp->b_wptr += sizeof (ipha_t); oipha->ipha_length = htons(ntohs(iipha->ipha_length) + sizeof (ipha_t)); oipha->ipha_protocol = IPPROTO_ENCAP; oipha->ipha_version_and_hdr_length = IP_SIMPLE_HDR_VERSION; oipha->ipha_hdr_checksum = 0; oipha->ipha_hdr_checksum = ip_csum_hdr(oipha); outer_mp->b_cont = inner_mp; ipsec_mp->b_cont = outer_mp; io->ipsec_out_se_done = B_TRUE; io->ipsec_out_tunnel = B_TRUE; } if (((ap->ipa_want_ah && (io->ipsec_out_ah_sa == NULL)) || (ap->ipa_want_esp && (io->ipsec_out_esp_sa == NULL))) && !ipsec_out_select_sa(ipsec_mp)) return; /* * By now, we know what SA's to use. Toss over to ESP & AH * to do the heavy lifting. */ zoneid = io->ipsec_out_zoneid; ASSERT(zoneid != ALL_ZONES); if ((io->ipsec_out_esp_done == B_FALSE) && (ap->ipa_want_esp)) { ASSERT(io->ipsec_out_esp_sa != NULL); io->ipsec_out_esp_done = B_TRUE; /* * Note that since hw accel can only apply one transform, * not two, we skip hw accel for ESP if we also have AH * This is an design limitation of the interface * which should be revisited. */ ASSERT(ire != NULL); if (io->ipsec_out_ah_sa == NULL) { ill = (ill_t *)ire->ire_stq->q_ptr; ipsec_out_is_accelerated(ipsec_mp, io->ipsec_out_esp_sa, ill, ire); } ipsec_rc = io->ipsec_out_esp_sa->ipsa_output_func(ipsec_mp); switch (ipsec_rc) { case IPSEC_STATUS_SUCCESS: break; case IPSEC_STATUS_FAILED: BUMP_MIB(&ip_mib, ipOutDiscards); /* FALLTHRU */ case IPSEC_STATUS_PENDING: return; } } if ((io->ipsec_out_ah_done == B_FALSE) && (ap->ipa_want_ah)) { ASSERT(io->ipsec_out_ah_sa != NULL); io->ipsec_out_ah_done = B_TRUE; if (ire == NULL) { int idx = io->ipsec_out_capab_ill_index; ill = ill_lookup_on_ifindex(idx, B_FALSE, NULL, NULL, NULL, NULL); ill_need_rele = B_TRUE; } else { ill = (ill_t *)ire->ire_stq->q_ptr; } ipsec_out_is_accelerated(ipsec_mp, io->ipsec_out_ah_sa, ill, ire); ipsec_rc = io->ipsec_out_ah_sa->ipsa_output_func(ipsec_mp); switch (ipsec_rc) { case IPSEC_STATUS_SUCCESS: break; case IPSEC_STATUS_FAILED: BUMP_MIB(&ip_mib, ipOutDiscards); /* FALLTHRU */ case IPSEC_STATUS_PENDING: if (ill != NULL && ill_need_rele) ill_refrele(ill); return; } } /* * We are done with IPSEC processing. Send it over * the wire. */ done: mp = ipsec_mp->b_cont; ipha = (ipha_t *)mp->b_rptr; if (IPH_HDR_VERSION(ipha) == IP_VERSION) { ip_wput_ipsec_out(q, ipsec_mp, ipha, ill, ire); } else { ip6h = (ip6_t *)ipha; ip_wput_ipsec_out_v6(q, ipsec_mp, ip6h, ill, ire); } if (ill != NULL && ill_need_rele) ill_refrele(ill); } /* ARGSUSED */ void ip_restart_optmgmt(ipsq_t *dummy_sq, queue_t *q, mblk_t *first_mp, void *dummy) { opt_restart_t *or; int err; conn_t *connp; ASSERT(CONN_Q(q)); connp = Q_TO_CONN(q); ASSERT(first_mp->b_datap->db_type == M_CTL); or = (opt_restart_t *)first_mp->b_rptr; /* * We don't need to pass any credentials here since this is just * a restart. The credentials are passed in when svr4_optcom_req * is called the first time (from ip_wput_nondata). */ if (or->or_type == T_SVR4_OPTMGMT_REQ) { err = svr4_optcom_req(q, first_mp, NULL, &ip_opt_obj); } else { ASSERT(or->or_type == T_OPTMGMT_REQ); err = tpi_optcom_req(q, first_mp, NULL, &ip_opt_obj); } if (err != EINPROGRESS) { /* operation is done */ CONN_OPER_PENDING_DONE(connp); } } /* * ioctls that go through a down/up sequence may need to wait for the down * to complete. This involves waiting for the ire and ipif refcnts to go down * to zero. Subsequently the ioctl is restarted from ipif_ill_refrele_tail. */ /* ARGSUSED */ void ip_reprocess_ioctl(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg) { struct iocblk *iocp; mblk_t *mp1; ipif_t *ipif; ip_ioctl_cmd_t *ipip; int err; sin_t *sin; struct lifreq *lifr; struct ifreq *ifr; iocp = (struct iocblk *)mp->b_rptr; ASSERT(ipsq != NULL); /* Existence of mp1 verified in ip_wput_nondata */ mp1 = mp->b_cont->b_cont; ipip = ip_sioctl_lookup(iocp->ioc_cmd); if (ipip->ipi_cmd == SIOCSLIFNAME || ipip->ipi_cmd == IF_UNITSEL) { ill_t *ill; /* * Special case where ipsq_current_ipif may not be set. * ill_phyint_reinit merged the v4 and v6 into a single ipsq. * ill could also have become part of a ipmp group in the * process, we are here as were not able to complete the * operation in ipif_set_values because we could not become * exclusive on the new ipsq, In such a case ipsq_current_ipif * will not be set so we need to set it. */ ill = (ill_t *)q->q_ptr; ipsq->ipsq_current_ipif = ill->ill_ipif; ipsq->ipsq_last_cmd = ipip->ipi_cmd; } ipif = ipsq->ipsq_current_ipif; ASSERT(ipif != NULL); if (ipip->ipi_cmd_type == IF_CMD) { /* This a old style SIOC[GS]IF* command */ ifr = (struct ifreq *)mp1->b_rptr; sin = (sin_t *)&ifr->ifr_addr; } else if (ipip->ipi_cmd_type == LIF_CMD) { /* This a new style SIOC[GS]LIF* command */ lifr = (struct lifreq *)mp1->b_rptr; sin = (sin_t *)&lifr->lifr_addr; } else { sin = NULL; } err = (*ipip->ipi_func_restart)(ipif, sin, q, mp, ipip, (void *)mp1->b_rptr); /* SIOCLIFREMOVEIF could have removed the ipif */ ip_ioctl_finish(q, mp, err, ipip->ipi_flags & IPI_GET_CMD ? COPYOUT : NO_COPYOUT, ipip->ipi_cmd == SIOCLIFREMOVEIF ? NULL : ipif, ipsq); } /* * ioctl processing * * ioctl processing starts with ip_sioctl_copyin_setup which looks up * the ioctl command in the ioctl tables and determines the copyin data size * from the ioctl property ipi_copyin_size, and does an mi_copyin() of that * size. * * ioctl processing then continues when the M_IOCDATA makes its way down. * Now the ioctl is looked up again in the ioctl table, and its properties are * extracted. The associated 'conn' is then refheld till the end of the ioctl * and the general ioctl processing function ip_process_ioctl is called. * ip_process_ioctl determines if the ioctl needs to be serialized, and if * so goes thru the serialization primitive ipsq_try_enter. Then the * appropriate function to handle the ioctl is called based on the entry in * the ioctl table. ioctl completion is encapsulated in ip_ioctl_finish * which also refreleases the 'conn' that was refheld at the start of the * ioctl. Finally ipsq_exit is called if needed to exit the ipsq. * ip_extract_lifreq_cmn extracts the interface name from the lifreq/ifreq * struct and looks up the ipif. ip_extract_tunreq handles the case of tunnel. * * Many exclusive ioctls go thru an internal down up sequence as part of * the operation. For example an attempt to change the IP address of an * ipif entails ipif_down, set address, ipif_up. Bringing down the interface * does all the cleanup such as deleting all ires that use this address. * Then we need to wait till all references to the interface go away. */ void ip_process_ioctl(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *arg) { struct iocblk *iocp = (struct iocblk *)mp->b_rptr; ip_ioctl_cmd_t *ipip = (ip_ioctl_cmd_t *)arg; cmd_info_t ci; int err; boolean_t entered_ipsq = B_FALSE; ip3dbg(("ip_process_ioctl: ioctl %X\n", iocp->ioc_cmd)); if (ipip == NULL) ipip = ip_sioctl_lookup(iocp->ioc_cmd); /* * SIOCLIFADDIF needs to go thru a special path since the * ill may not exist yet. This happens in the case of lo0 * which is created using this ioctl. */ if (ipip->ipi_cmd == SIOCLIFADDIF) { err = ip_sioctl_addif(NULL, NULL, q, mp, NULL, NULL); ip_ioctl_finish(q, mp, err, ipip->ipi_flags & IPI_GET_CMD ? COPYOUT : NO_COPYOUT, NULL, NULL); return; } ci.ci_ipif = NULL; switch (ipip->ipi_cmd_type) { case IF_CMD: case LIF_CMD: /* * ioctls that pass in a [l]ifreq appear here. * ip_extract_lifreq_cmn returns a refheld ipif in * ci.ci_ipif */ err = ip_extract_lifreq_cmn(q, mp, ipip->ipi_cmd_type, ipip->ipi_flags, &ci, ip_process_ioctl); if (err != 0) { ip_ioctl_finish(q, mp, err, ipip->ipi_flags & IPI_GET_CMD ? COPYOUT : NO_COPYOUT, NULL, NULL); return; } ASSERT(ci.ci_ipif != NULL); break; case TUN_CMD: /* * SIOC[GS]TUNPARAM appear here. ip_extract_tunreq returns * a refheld ipif in ci.ci_ipif */ err = ip_extract_tunreq(q, mp, &ci.ci_ipif, ip_process_ioctl); if (err != 0) { ip_ioctl_finish(q, mp, err, ipip->ipi_flags & IPI_GET_CMD ? COPYOUT : NO_COPYOUT, NULL, NULL); return; } ASSERT(ci.ci_ipif != NULL); break; case MISC_CMD: /* * ioctls that neither pass in [l]ifreq or iftun_req come here * For eg. SIOCGLIFCONF will appear here. */ switch (ipip->ipi_cmd) { case IF_UNITSEL: /* ioctl comes down the ill */ ci.ci_ipif = ((ill_t *)q->q_ptr)->ill_ipif; ipif_refhold(ci.ci_ipif); break; case SIOCGMSFILTER: case SIOCSMSFILTER: case SIOCGIPMSFILTER: case SIOCSIPMSFILTER: err = ip_extract_msfilter(q, mp, &ci.ci_ipif, ip_process_ioctl); if (err != 0) { ip_ioctl_finish(q, mp, err, ipip->ipi_flags & IPI_GET_CMD ? COPYOUT : NO_COPYOUT, NULL, NULL); return; } break; } err = 0; ci.ci_sin = NULL; ci.ci_sin6 = NULL; ci.ci_lifr = NULL; break; } /* * If ipsq is non-null, we are already being called exclusively */ ASSERT(ipsq == NULL || IAM_WRITER_IPSQ(ipsq)); if (!(ipip->ipi_flags & IPI_WR)) { /* * A return value of EINPROGRESS means the ioctl is * either queued and waiting for some reason or has * already completed. */ err = (*ipip->ipi_func)(ci.ci_ipif, ci.ci_sin, q, mp, ipip, ci.ci_lifr); if (ci.ci_ipif != NULL) ipif_refrele(ci.ci_ipif); ip_ioctl_finish(q, mp, err, ipip->ipi_flags & IPI_GET_CMD ? COPYOUT : NO_COPYOUT, NULL, NULL); return; } ASSERT(ci.ci_ipif != NULL); if (ipsq == NULL) { ipsq = ipsq_try_enter(ci.ci_ipif, NULL, q, mp, ip_process_ioctl, NEW_OP, B_TRUE); entered_ipsq = B_TRUE; } /* * Release the ipif so that ipif_down and friends that wait for * references to go away are not misled about the current ipif_refcnt * values. We are writer so we can access the ipif even after releasing * the ipif. */ ipif_refrele(ci.ci_ipif); if (ipsq == NULL) return; mutex_enter(&ipsq->ipsq_lock); ASSERT(ipsq->ipsq_current_ipif == NULL); ipsq->ipsq_current_ipif = ci.ci_ipif; ipsq->ipsq_last_cmd = ipip->ipi_cmd; mutex_exit(&ipsq->ipsq_lock); mutex_enter(&(ci.ci_ipif)->ipif_ill->ill_lock); /* * For most set ioctls that come here, this serves as a single point * where we set the IPIF_CHANGING flag. This ensures that there won't * be any new references to the ipif. This helps functions that go * through this path and end up trying to wait for the refcnts * associated with the ipif to go down to zero. Some exceptions are * Failover, Failback, and Groupname commands that operate on more than * just the ci.ci_ipif. These commands internally determine the * set of ipif's they operate on and set and clear the IPIF_CHANGING * flags on that set. Another exception is the Removeif command that * sets the IPIF_CONDEMNED flag internally after identifying the right * ipif to operate on. */ if (ipip->ipi_cmd != SIOCLIFREMOVEIF && ipip->ipi_cmd != SIOCLIFFAILOVER && ipip->ipi_cmd != SIOCLIFFAILBACK && ipip->ipi_cmd != SIOCSLIFGROUPNAME) (ci.ci_ipif)->ipif_state_flags |= IPIF_CHANGING; mutex_exit(&(ci.ci_ipif)->ipif_ill->ill_lock); /* * A return value of EINPROGRESS means the ioctl is * either queued and waiting for some reason or has * already completed. */ err = (*ipip->ipi_func)(ci.ci_ipif, ci.ci_sin, q, mp, ipip, ci.ci_lifr); /* SIOCLIFREMOVEIF could have removed the ipif */ ip_ioctl_finish(q, mp, err, ipip->ipi_flags & IPI_GET_CMD ? COPYOUT : NO_COPYOUT, ipip->ipi_cmd == SIOCLIFREMOVEIF ? NULL : ci.ci_ipif, ipsq); if (entered_ipsq) ipsq_exit(ipsq, B_TRUE, B_TRUE); } /* * Complete the ioctl. Typically ioctls use the mi package and need to * do mi_copyout/mi_copy_done. */ void ip_ioctl_finish(queue_t *q, mblk_t *mp, int err, int mode, ipif_t *ipif, ipsq_t *ipsq) { conn_t *connp = NULL; hook_nic_event_t *info; if (err == EINPROGRESS) return; if (CONN_Q(q)) { connp = Q_TO_CONN(q); ASSERT(connp->conn_ref >= 2); } switch (mode) { case COPYOUT: if (err == 0) mi_copyout(q, mp); else mi_copy_done(q, mp, err); break; case NO_COPYOUT: mi_copy_done(q, mp, err); break; default: /* An ioctl aborted through a conn close would take this path */ break; } /* * The refhold placed at the start of the ioctl is released here. */ if (connp != NULL) CONN_OPER_PENDING_DONE(connp); /* * If the ioctl were an exclusive ioctl it would have set * IPIF_CHANGING at the start of the ioctl which is undone here. */ if (ipif != NULL) { mutex_enter(&(ipif)->ipif_ill->ill_lock); ipif->ipif_state_flags &= ~IPIF_CHANGING; /* * Unhook the nic event message from the ill and enqueue it into * the nic event taskq. */ if ((info = ipif->ipif_ill->ill_nic_event_info) != NULL) { if (ddi_taskq_dispatch(eventq_queue_nic, ip_ne_queue_func, (void *)info, DDI_SLEEP) == DDI_FAILURE) { ip2dbg(("ip_ioctl_finish: ddi_taskq_dispatch" "failed\n")); if (info->hne_data != NULL) kmem_free(info->hne_data, info->hne_datalen); kmem_free(info, sizeof (hook_nic_event_t)); } ipif->ipif_ill->ill_nic_event_info = NULL; } mutex_exit(&(ipif)->ipif_ill->ill_lock); } /* * Clear the current ipif in the ipsq at the completion of the ioctl. * Note that a non-null ipsq_current_ipif prevents new ioctls from * entering the ipsq */ if (ipsq != NULL) { mutex_enter(&ipsq->ipsq_lock); ipsq->ipsq_current_ipif = NULL; mutex_exit(&ipsq->ipsq_lock); } } /* * This is called from ip_wput_nondata to resume a deferred TCP bind. */ /* ARGSUSED */ void ip_resume_tcp_bind(void *arg, mblk_t *mp, void *arg2) { conn_t *connp = arg; tcp_t *tcp; ASSERT(connp != NULL && IPCL_IS_TCP(connp) && connp->conn_tcp != NULL); tcp = connp->conn_tcp; if (connp->conn_tcp->tcp_state == TCPS_CLOSED) freemsg(mp); else tcp_rput_other(tcp, mp); CONN_OPER_PENDING_DONE(connp); } /* Called from ip_wput for all non data messages */ /* ARGSUSED */ void ip_wput_nondata(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg) { mblk_t *mp1; ire_t *ire, *fake_ire; ill_t *ill; struct iocblk *iocp; ip_ioctl_cmd_t *ipip; cred_t *cr; conn_t *connp = NULL; int cmd, err; nce_t *nce; ipif_t *ipif; if (CONN_Q(q)) connp = Q_TO_CONN(q); cr = DB_CREDDEF(mp, GET_QUEUE_CRED(q)); /* Check if it is a queue to /dev/sctp. */ if (connp != NULL && connp->conn_ulp == IPPROTO_SCTP && connp->conn_rq == NULL) { sctp_wput(q, mp); return; } switch (DB_TYPE(mp)) { case M_IOCTL: /* * IOCTL processing begins in ip_sioctl_copyin_setup which * will arrange to copy in associated control structures. */ ip_sioctl_copyin_setup(q, mp); return; case M_IOCDATA: /* * Ensure that this is associated with one of our trans- * parent ioctls. If it's not ours, discard it if we're * running as a driver, or pass it on if we're a module. */ iocp = (struct iocblk *)mp->b_rptr; ipip = ip_sioctl_lookup(iocp->ioc_cmd); if (ipip == NULL) { if (q->q_next == NULL) { goto nak; } else { putnext(q, mp); } return; } else if ((q->q_next != NULL) && !(ipip->ipi_flags & IPI_MODOK)) { /* * the ioctl is one we recognise, but is not * consumed by IP as a module, pass M_IOCDATA * for processing downstream, but only for * common Streams ioctls. */ if (ipip->ipi_flags & IPI_PASS_DOWN) { putnext(q, mp); return; } else { goto nak; } } /* IOCTL continuation following copyin or copyout. */ if (mi_copy_state(q, mp, NULL) == -1) { /* * The copy operation failed. mi_copy_state already * cleaned up, so we're out of here. */ return; } /* * If we just completed a copy in, we become writer and * continue processing in ip_sioctl_copyin_done. If it * was a copy out, we call mi_copyout again. If there is * nothing more to copy out, it will complete the IOCTL. */ if (MI_COPY_DIRECTION(mp) == MI_COPY_IN) { if (!(mp1 = mp->b_cont) || !(mp1 = mp1->b_cont)) { mi_copy_done(q, mp, EPROTO); return; } /* * Check for cases that need more copying. A return * value of 0 means a second copyin has been started, * so we return; a return value of 1 means no more * copying is needed, so we continue. */ cmd = iocp->ioc_cmd; if ((cmd == SIOCGMSFILTER || cmd == SIOCSMSFILTER || cmd == SIOCGIPMSFILTER || cmd == SIOCSIPMSFILTER) && MI_COPY_COUNT(mp) == 1) { if (ip_copyin_msfilter(q, mp) == 0) return; } /* * Refhold the conn, till the ioctl completes. This is * needed in case the ioctl ends up in the pending mp * list. Every mp in the ill_pending_mp list and * the ipsq_pending_mp must have a refhold on the conn * to resume processing. The refhold is released when * the ioctl completes. (normally or abnormally) * In all cases ip_ioctl_finish is called to finish * the ioctl. */ if (connp != NULL) { /* This is not a reentry */ ASSERT(ipsq == NULL); CONN_INC_REF(connp); } else { if (!(ipip->ipi_flags & IPI_MODOK)) { mi_copy_done(q, mp, EINVAL); return; } } ip_process_ioctl(ipsq, q, mp, ipip); } else { mi_copyout(q, mp); } return; nak: iocp->ioc_error = EINVAL; mp->b_datap->db_type = M_IOCNAK; iocp->ioc_count = 0; qreply(q, mp); return; case M_IOCNAK: /* * The only way we could get here is if a resolver didn't like * an IOCTL we sent it. This shouldn't happen. */ (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "ip_wput: unexpected M_IOCNAK, ioc_cmd 0x%x", ((struct iocblk *)mp->b_rptr)->ioc_cmd); freemsg(mp); return; case M_IOCACK: /* Finish socket ioctls passed through to ARP. */ ip_sioctl_iocack(q, mp); return; case M_FLUSH: if (*mp->b_rptr & FLUSHW) flushq(q, FLUSHALL); if (q->q_next) { /* * M_FLUSH is sent up to IP by some drivers during * unbind. ip_rput has already replied to it. We are * here for the M_FLUSH that we originated in IP * before sending the unbind request to the driver. * Just free it as we don't queue packets in IP * on the write side of the device instance. */ freemsg(mp); return; } if (*mp->b_rptr & FLUSHR) { *mp->b_rptr &= ~FLUSHW; qreply(q, mp); return; } freemsg(mp); return; case IRE_DB_REQ_TYPE: /* An Upper Level Protocol wants a copy of an IRE. */ ip_ire_req(q, mp); return; case M_CTL: if (mp->b_wptr - mp->b_rptr < sizeof (uint32_t)) break; if (((ipsec_info_t *)mp->b_rptr)->ipsec_info_type == TUN_HELLO) { ASSERT(connp != NULL); connp->conn_flags |= IPCL_IPTUN; freeb(mp); return; } if (connp != NULL && *(uint32_t *)mp->b_rptr == IP_ULP_OUT_LABELED) { out_labeled_t *olp; if (mp->b_wptr - mp->b_rptr != sizeof (*olp)) break; olp = (out_labeled_t *)mp->b_rptr; connp->conn_ulp_labeled = olp->out_qnext == q; freemsg(mp); return; } /* M_CTL messages are used by ARP to tell us things. */ if ((mp->b_wptr - mp->b_rptr) < sizeof (arc_t)) break; switch (((arc_t *)mp->b_rptr)->arc_cmd) { case AR_ENTRY_SQUERY: ip_wput_ctl(q, mp); return; case AR_CLIENT_NOTIFY: ip_arp_news(q, mp); return; case AR_DLPIOP_DONE: ASSERT(q->q_next != NULL); ill = (ill_t *)q->q_ptr; /* qwriter_ip releases the refhold */ /* refhold on ill stream is ok without ILL_CAN_LOOKUP */ ill_refhold(ill); (void) qwriter_ip(NULL, ill, q, mp, ip_arp_done, CUR_OP, B_FALSE); return; case AR_ARP_CLOSING: /* * ARP (above us) is closing. If no ARP bringup is * currently pending, ack the message so that ARP * can complete its close. Also mark ill_arp_closing * so that new ARP bringups will fail. If any * ARP bringup is currently in progress, we will * ack this when the current ARP bringup completes. */ ASSERT(q->q_next != NULL); ill = (ill_t *)q->q_ptr; mutex_enter(&ill->ill_lock); ill->ill_arp_closing = 1; if (!ill->ill_arp_bringup_pending) { mutex_exit(&ill->ill_lock); qreply(q, mp); } else { mutex_exit(&ill->ill_lock); freemsg(mp); } return; case AR_ARP_EXTEND: /* * The ARP module above us is capable of duplicate * address detection. Old ATM drivers will not send * this message. */ ASSERT(q->q_next != NULL); ill = (ill_t *)q->q_ptr; ill->ill_arp_extend = B_TRUE; freemsg(mp); return; default: break; } break; case M_PROTO: case M_PCPROTO: /* * The only PROTO messages we expect are ULP binds and * copies of option negotiation acknowledgements. */ switch (((union T_primitives *)mp->b_rptr)->type) { case O_T_BIND_REQ: case T_BIND_REQ: { /* Request can get queued in bind */ ASSERT(connp != NULL); /* * Both TCP and UDP call ip_bind_{v4,v6}() directly * instead of going through this path. We only get * here in the following cases: * * a. Bind retries, where ipsq is non-NULL. * b. T_BIND_REQ is issued from non TCP/UDP * transport, e.g. icmp for raw socket, * in which case ipsq will be NULL. */ ASSERT(ipsq != NULL || (!IPCL_IS_TCP(connp) && !IPCL_IS_UDP(connp))); /* Don't increment refcnt if this is a re-entry */ if (ipsq == NULL) CONN_INC_REF(connp); mp = connp->conn_af_isv6 ? ip_bind_v6(q, mp, connp, NULL) : ip_bind_v4(q, mp, connp); if (mp == NULL) return; if (IPCL_IS_TCP(connp)) { /* * In the case of TCP endpoint we * come here only for bind retries */ ASSERT(ipsq != NULL); CONN_INC_REF(connp); squeue_fill(connp->conn_sqp, mp, ip_resume_tcp_bind, connp, SQTAG_BIND_RETRY); return; } else if (IPCL_IS_UDP(connp)) { /* * In the case of UDP endpoint we * come here only for bind retries */ ASSERT(ipsq != NULL); udp_resume_bind(connp, mp); return; } qreply(q, mp); CONN_OPER_PENDING_DONE(connp); return; } case T_SVR4_OPTMGMT_REQ: ip2dbg(("ip_wput: T_SVR4_OPTMGMT_REQ flags %x\n", ((struct T_optmgmt_req *)mp->b_rptr)->MGMT_flags)); ASSERT(connp != NULL); if (!snmpcom_req(q, mp, ip_snmp_set, ip_snmp_get, cr)) { /* * Call svr4_optcom_req so that it can * generate the ack. We don't come here * if this operation is being restarted. * ip_restart_optmgmt will drop the conn ref. * In the case of ipsec option after the ipsec * load is complete conn_restart_ipsec_waiter * drops the conn ref. */ ASSERT(ipsq == NULL); CONN_INC_REF(connp); if (ip_check_for_ipsec_opt(q, mp)) return; err = svr4_optcom_req(q, mp, cr, &ip_opt_obj); if (err != EINPROGRESS) { /* Operation is done */ CONN_OPER_PENDING_DONE(connp); } } return; case T_OPTMGMT_REQ: ip2dbg(("ip_wput: T_OPTMGMT_REQ\n")); /* * Note: No snmpcom_req support through new * T_OPTMGMT_REQ. * Call tpi_optcom_req so that it can * generate the ack. */ ASSERT(connp != NULL); ASSERT(ipsq == NULL); /* * We don't come here for restart. ip_restart_optmgmt * will drop the conn ref. In the case of ipsec option * after the ipsec load is complete * conn_restart_ipsec_waiter drops the conn ref. */ CONN_INC_REF(connp); if (ip_check_for_ipsec_opt(q, mp)) return; err = tpi_optcom_req(q, mp, cr, &ip_opt_obj); if (err != EINPROGRESS) { /* Operation is done */ CONN_OPER_PENDING_DONE(connp); } return; case T_UNBIND_REQ: mp = ip_unbind(q, mp); qreply(q, mp); return; default: /* * Have to drop any DLPI messages coming down from * arp (such as an info_req which would cause ip * to receive an extra info_ack if it was passed * through. */ ip1dbg(("ip_wput_nondata: dropping M_PROTO %d\n", (int)*(uint_t *)mp->b_rptr)); freemsg(mp); return; } /* NOTREACHED */ case IRE_DB_TYPE: { nce_t *nce; ill_t *ill; in6_addr_t gw_addr_v6; /* * This is a response back from a resolver. It * consists of a message chain containing: * IRE_MBLK-->LL_HDR_MBLK->pkt * The IRE_MBLK is the one we allocated in ip_newroute. * The LL_HDR_MBLK is the DLPI header to use to get * the attached packet, and subsequent ones for the * same destination, transmitted. */ if ((mp->b_wptr - mp->b_rptr) != sizeof (ire_t)) /* ire */ break; /* * First, check to make sure the resolution succeeded. * If it failed, the second mblk will be empty. * If it is, free the chain, dropping the packet. * (We must ire_delete the ire; that frees the ire mblk) * We're doing this now to support PVCs for ATM; it's * a partial xresolv implementation. When we fully implement * xresolv interfaces, instead of freeing everything here * we'll initiate neighbor discovery. * * For v4 (ARP and other external resolvers) the resolver * frees the message, so no check is needed. This check * is required, though, for a full xresolve implementation. * Including this code here now both shows how external * resolvers can NACK a resolution request using an * existing design that has no specific provisions for NACKs, * and also takes into account that the current non-ARP * external resolver has been coded to use this method of * NACKing for all IPv6 (xresolv) cases, * whether our xresolv implementation is complete or not. * */ ire = (ire_t *)mp->b_rptr; ill = ire_to_ill(ire); mp1 = mp->b_cont; /* dl_unitdata_req */ if (mp1->b_rptr == mp1->b_wptr) { if (ire->ire_ipversion == IPV6_VERSION) { /* * XRESOLV interface. */ ASSERT(ill->ill_flags & ILLF_XRESOLV); mutex_enter(&ire->ire_lock); gw_addr_v6 = ire->ire_gateway_addr_v6; mutex_exit(&ire->ire_lock); if (IN6_IS_ADDR_UNSPECIFIED(&gw_addr_v6)) { nce = ndp_lookup_v6(ill, &ire->ire_addr_v6, B_FALSE); } else { nce = ndp_lookup_v6(ill, &gw_addr_v6, B_FALSE); } if (nce != NULL) { nce_resolv_failed(nce); ndp_delete(nce); NCE_REFRELE(nce); } } mp->b_cont = NULL; freemsg(mp1); /* frees the pkt as well */ ASSERT(ire->ire_nce == NULL); ire_delete((ire_t *)mp->b_rptr); return; } /* * Split them into IRE_MBLK and pkt and feed it into * ire_add_then_send. Then in ire_add_then_send * the IRE will be added, and then the packet will be * run back through ip_wput. This time it will make * it to the wire. */ mp->b_cont = NULL; mp = mp1->b_cont; /* now, mp points to pkt */ mp1->b_cont = NULL; ip1dbg(("ip_wput_nondata: reply from external resolver \n")); if (ire->ire_ipversion == IPV6_VERSION) { /* * XRESOLV interface. Find the nce and put a copy * of the dl_unitdata_req in nce_res_mp */ ASSERT(ill->ill_flags & ILLF_XRESOLV); mutex_enter(&ire->ire_lock); gw_addr_v6 = ire->ire_gateway_addr_v6; mutex_exit(&ire->ire_lock); if (IN6_IS_ADDR_UNSPECIFIED(&gw_addr_v6)) { nce = ndp_lookup_v6(ill, &ire->ire_addr_v6, B_FALSE); } else { nce = ndp_lookup_v6(ill, &gw_addr_v6, B_FALSE); } if (nce != NULL) { /* * We have to protect nce_res_mp here * from being accessed by other threads * while we change the mblk pointer. * Other functions will also lock the nce when * accessing nce_res_mp. * * The reason we change the mblk pointer * here rather than copying the resolved address * into the template is that, unlike with * ethernet, we have no guarantee that the * resolved address length will be * smaller than or equal to the lla length * with which the template was allocated, * (for ethernet, they're equal) * so we have to use the actual resolved * address mblk - which holds the real * dl_unitdata_req with the resolved address. * * Doing this is the same behavior as was * previously used in the v4 ARP case. */ mutex_enter(&nce->nce_lock); if (nce->nce_res_mp != NULL) freemsg(nce->nce_res_mp); nce->nce_res_mp = mp1; mutex_exit(&nce->nce_lock); /* * We do a fastpath probe here because * we have resolved the address without * using Neighbor Discovery. * In the non-XRESOLV v6 case, the fastpath * probe is done right after neighbor * discovery completes. */ if (nce->nce_res_mp != NULL) { int res; nce_fastpath_list_add(nce); res = ill_fastpath_probe(ill, nce->nce_res_mp); if (res != 0 && res != EAGAIN) nce_fastpath_list_delete(nce); } ire_add_then_send(q, ire, mp); /* * Now we have to clean out any packets * that may have been queued on the nce * while it was waiting for address resolution * to complete. */ mutex_enter(&nce->nce_lock); mp1 = nce->nce_qd_mp; nce->nce_qd_mp = NULL; mutex_exit(&nce->nce_lock); while (mp1 != NULL) { mblk_t *nxt_mp; queue_t *fwdq = NULL; ill_t *inbound_ill; uint_t ifindex; nxt_mp = mp1->b_next; mp1->b_next = NULL; /* * Retrieve ifindex stored in * ip_rput_data_v6() */ ifindex = (uint_t)(uintptr_t)mp1->b_prev; inbound_ill = ill_lookup_on_ifindex(ifindex, B_TRUE, NULL, NULL, NULL, NULL); mp1->b_prev = NULL; if (inbound_ill != NULL) fwdq = inbound_ill->ill_rq; if (fwdq != NULL) { put(fwdq, mp1); ill_refrele(inbound_ill); } else put(WR(ill->ill_rq), mp1); mp1 = nxt_mp; } NCE_REFRELE(nce); } else { /* nce is NULL; clean up */ ire_delete(ire); freemsg(mp); freemsg(mp1); return; } } else { nce_t *arpce; /* * Link layer resolution succeeded. Recompute the * ire_nce. */ ASSERT(ire->ire_type & (IRE_CACHE|IRE_BROADCAST)); if ((arpce = ndp_lookup_v4(ill, (ire->ire_gateway_addr != INADDR_ANY ? &ire->ire_gateway_addr : &ire->ire_addr), B_FALSE)) == NULL) { freeb(ire->ire_mp); freeb(mp1); freemsg(mp); return; } mutex_enter(&arpce->nce_lock); arpce->nce_last = TICK_TO_MSEC(lbolt64); if (arpce->nce_state == ND_REACHABLE) { /* * Someone resolved this before us; * cleanup the res_mp. Since ire has * not been added yet, the call to ire_add_v4 * from ire_add_then_send (when a dup is * detected) will clean up the ire. */ freeb(mp1); } else { if (arpce->nce_res_mp != NULL) freemsg(arpce->nce_res_mp); arpce->nce_res_mp = mp1; arpce->nce_state = ND_REACHABLE; } mutex_exit(&arpce->nce_lock); if (ire->ire_marks & IRE_MARK_NOADD) { /* * this ire will not be added to the ire * cache table, so we can set the ire_nce * here, as there are no atomicity constraints. */ ire->ire_nce = arpce; /* * We are associating this nce with the ire * so change the nce ref taken in * ndp_lookup_v4() from * NCE_REFHOLD to NCE_REFHOLD_NOTR */ NCE_REFHOLD_TO_REFHOLD_NOTR(ire->ire_nce); } else { NCE_REFRELE(arpce); } ire_add_then_send(q, ire, mp); } return; /* All is well, the packet has been sent. */ } case IRE_ARPRESOLVE_TYPE: { if ((mp->b_wptr - mp->b_rptr) != sizeof (ire_t)) /* fake_ire */ break; mp1 = mp->b_cont; /* dl_unitdata_req */ mp->b_cont = NULL; /* * First, check to make sure the resolution succeeded. * If it failed, the second mblk will be empty. */ if (mp1->b_rptr == mp1->b_wptr) { /* cleanup the incomplete ire, free queued packets */ freemsg(mp); /* fake ire */ freeb(mp1); /* dl_unitdata response */ return; } /* * update any incomplete nce_t found. we lookup the ctable * and find the nce from the ire->ire_nce because we need * to pass the ire to ip_xmit_v4 later, and can find both * ire and nce in one lookup from the ctable. */ fake_ire = (ire_t *)mp->b_rptr; /* * By the time we come back here from ARP * the logical outgoing interface of the incomplete ire * we added in ire_forward could have disappeared, * causing the incomplete ire to also have * dissapeared. So we need to retreive the * proper ipif for the ire before looking * in ctable; do the ctablelookup based on ire_ipif_seqid */ ill = q->q_ptr; /* Get the outgoing ipif */ mutex_enter(&ill->ill_lock); if (ill->ill_state_flags & ILL_CONDEMNED) { mutex_exit(&ill->ill_lock); freemsg(mp); /* fake ire */ freeb(mp1); /* dl_unitdata response */ return; } ipif = ipif_lookup_seqid(ill, fake_ire->ire_ipif_seqid); if (ipif == NULL) { mutex_exit(&ill->ill_lock); ip1dbg(("logical intrf to incomplete ire vanished\n")); freemsg(mp); freeb(mp1); return; } ipif_refhold_locked(ipif); mutex_exit(&ill->ill_lock); ire = ire_ctable_lookup(fake_ire->ire_addr, fake_ire->ire_gateway_addr, IRE_CACHE, ipif, fake_ire->ire_zoneid, NULL, (MATCH_IRE_GW|MATCH_IRE_IPIF|MATCH_IRE_ZONEONLY)); ipif_refrele(ipif); if (ire == NULL) { /* * no ire was found; check if there is an nce * for this lookup; if it has no ire's pointing at it * cleanup. */ if ((nce = ndp_lookup_v4(ill, (fake_ire->ire_gateway_addr != INADDR_ANY ? &fake_ire->ire_gateway_addr : &fake_ire->ire_addr), B_FALSE)) != NULL) { /* * cleanup: just reset nce. * We check for refcnt 2 (one for the nce * hash list + 1 for the ref taken by * ndp_lookup_v4) to ensure that there are * no ire's pointing at the nce. */ if (nce->nce_refcnt == 2) { nce = nce_reinit(nce); } if (nce != NULL) NCE_REFRELE(nce); } freeb(mp1); /* dl_unitdata response */ freemsg(mp); /* fake ire */ return; } nce = ire->ire_nce; DTRACE_PROBE2(ire__arpresolve__type, ire_t *, ire, nce_t *, nce); ASSERT(nce->nce_state != ND_INITIAL); mutex_enter(&nce->nce_lock); nce->nce_last = TICK_TO_MSEC(lbolt64); if (nce->nce_state == ND_REACHABLE) { /* * Someone resolved this before us; * our response is not needed any more. */ mutex_exit(&nce->nce_lock); freeb(mp1); /* dl_unitdata response */ } else { if (nce->nce_res_mp != NULL) { freemsg(nce->nce_res_mp); /* existing dl_unitdata template */ } nce->nce_res_mp = mp1; nce->nce_state = ND_REACHABLE; mutex_exit(&nce->nce_lock); ire_fastpath(ire); } /* * The cached nce_t has been updated to be reachable; * Set the IRE_MARK_UNCACHED flag and free the fake_ire. */ fake_ire->ire_marks &= ~IRE_MARK_UNCACHED; freemsg(mp); /* * send out queued packets. */ (void) ip_xmit_v4(NULL, ire, NULL, B_FALSE); IRE_REFRELE(ire); return; } default: break; } if (q->q_next) { putnext(q, mp); } else freemsg(mp); } /* * Process IP options in an outbound packet. Modify the destination if there * is a source route option. * Returns non-zero if something fails in which case an ICMP error has been * sent and mp freed. */ static int ip_wput_options(queue_t *q, mblk_t *ipsec_mp, ipha_t *ipha, boolean_t mctl_present, zoneid_t zoneid) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; intptr_t code = 0; mblk_t *mp; ire_t *ire = NULL; ip2dbg(("ip_wput_options\n")); mp = ipsec_mp; if (mctl_present) { mp = ipsec_mp->b_cont; } dst = ipha->ipha_dst; for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ip2dbg(("ip_wput_options: opt %d, len %d\n", optval, optlen)); switch (optval) { uint32_t off; case IPOPT_SSRR: case IPOPT_LSRR: if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(( "ip_wput_options: bad option offset\n")); code = (char *)&opt[IPOPT_OLEN] - (char *)ipha; goto param_prob; } off = opt[IPOPT_OFFSET]; ip1dbg(("ip_wput_options: next hop 0x%x\n", ntohl(dst))); /* * For strict: verify that dst is directly * reachable. */ if (optval == IPOPT_SSRR) { ire = ire_ftable_lookup(dst, 0, 0, IRE_INTERFACE, NULL, NULL, ALL_ZONES, 0, MBLK_GETLABEL(mp), MATCH_IRE_TYPE | MATCH_IRE_SECATTR); if (ire == NULL) { ip1dbg(("ip_wput_options: SSRR not" " directly reachable: 0x%x\n", ntohl(dst))); goto bad_src_route; } ire_refrele(ire); } break; case IPOPT_RR: if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(( "ip_wput_options: bad option offset\n")); code = (char *)&opt[IPOPT_OLEN] - (char *)ipha; goto param_prob; } break; case IPOPT_TS: /* * Verify that length >=5 and that there is either * room for another timestamp or that the overflow * counter is not maxed out. */ code = (char *)&opt[IPOPT_OLEN] - (char *)ipha; if (optlen < IPOPT_MINLEN_IT) { goto param_prob; } if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(( "ip_wput_options: bad option offset\n")); code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha; goto param_prob; } switch (opt[IPOPT_POS_OV_FLG] & 0x0F) { case IPOPT_TS_TSONLY: off = IPOPT_TS_TIMELEN; break; case IPOPT_TS_TSANDADDR: case IPOPT_TS_PRESPEC: case IPOPT_TS_PRESPEC_RFC791: off = IP_ADDR_LEN + IPOPT_TS_TIMELEN; break; default: code = (char *)&opt[IPOPT_POS_OV_FLG] - (char *)ipha; goto param_prob; } if (opt[IPOPT_OFFSET] - 1 + off > optlen && (opt[IPOPT_POS_OV_FLG] & 0xF0) == 0xF0) { /* * No room and the overflow counter is 15 * already. */ goto param_prob; } break; } } if ((opts.ipoptp_flags & IPOPTP_ERROR) == 0) return (0); ip1dbg(("ip_wput_options: error processing IP options.")); code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha; param_prob: /* * Since ip_wput() isn't close to finished, we fill * in enough of the header for credible error reporting. */ if (ip_hdr_complete((ipha_t *)mp->b_rptr, zoneid)) { /* Failed */ freemsg(ipsec_mp); return (-1); } icmp_param_problem(q, ipsec_mp, (uint8_t)code, zoneid); return (-1); bad_src_route: /* * Since ip_wput() isn't close to finished, we fill * in enough of the header for credible error reporting. */ if (ip_hdr_complete((ipha_t *)mp->b_rptr, zoneid)) { /* Failed */ freemsg(ipsec_mp); return (-1); } icmp_unreachable(q, ipsec_mp, ICMP_SOURCE_ROUTE_FAILED, zoneid); return (-1); } /* * The maximum value of conn_drain_list_cnt is CONN_MAXDRAINCNT. * conn_drain_list_cnt can be changed by setting conn_drain_nthreads * thru /etc/system. */ #define CONN_MAXDRAINCNT 64 static void conn_drain_init(void) { int i; conn_drain_list_cnt = conn_drain_nthreads; if ((conn_drain_list_cnt == 0) || (conn_drain_list_cnt > CONN_MAXDRAINCNT)) { /* * Default value of the number of drainers is the * number of cpus, subject to maximum of 8 drainers. */ if (boot_max_ncpus != -1) conn_drain_list_cnt = MIN(boot_max_ncpus, 8); else conn_drain_list_cnt = MIN(max_ncpus, 8); } conn_drain_list = kmem_zalloc(conn_drain_list_cnt * sizeof (idl_t), KM_SLEEP); for (i = 0; i < conn_drain_list_cnt; i++) { mutex_init(&conn_drain_list[i].idl_lock, NULL, MUTEX_DEFAULT, NULL); } } static void conn_drain_fini(void) { int i; for (i = 0; i < conn_drain_list_cnt; i++) mutex_destroy(&conn_drain_list[i].idl_lock); kmem_free(conn_drain_list, conn_drain_list_cnt * sizeof (idl_t)); conn_drain_list = NULL; } /* * Note: For an overview of how flowcontrol is handled in IP please see the * IP Flowcontrol notes at the top of this file. * * Flow control has blocked us from proceeding. Insert the given conn in one * of the conn drain lists. These conn wq's will be qenabled later on when * STREAMS flow control does a backenable. conn_walk_drain will enable * the first conn in each of these drain lists. Each of these qenabled conns * in turn enables the next in the list, after it runs, or when it closes, * thus sustaining the drain process. * * The only possible calling sequence is ip_wsrv (on conn) -> ip_wput -> * conn_drain_insert. Thus there can be only 1 instance of conn_drain_insert * running at any time, on a given conn, since there can be only 1 service proc * running on a queue at any time. */ void conn_drain_insert(conn_t *connp) { idl_t *idl; uint_t index; mutex_enter(&connp->conn_lock); if (connp->conn_state_flags & CONN_CLOSING) { /* * The conn is closing as a result of which CONN_CLOSING * is set. Return. */ mutex_exit(&connp->conn_lock); return; } else if (connp->conn_idl == NULL) { /* * Assign the next drain list round robin. We dont' use * a lock, and thus it may not be strictly round robin. * Atomicity of load/stores is enough to make sure that * conn_drain_list_index is always within bounds. */ index = conn_drain_list_index; ASSERT(index < conn_drain_list_cnt); connp->conn_idl = &conn_drain_list[index]; index++; if (index == conn_drain_list_cnt) index = 0; conn_drain_list_index = index; } mutex_exit(&connp->conn_lock); mutex_enter(CONN_DRAIN_LIST_LOCK(connp)); if ((connp->conn_drain_prev != NULL) || (connp->conn_state_flags & CONN_CLOSING)) { /* * The conn is already in the drain list, OR * the conn is closing. We need to check again for * the closing case again since close can happen * after we drop the conn_lock, and before we * acquire the CONN_DRAIN_LIST_LOCK. */ mutex_exit(CONN_DRAIN_LIST_LOCK(connp)); return; } else { idl = connp->conn_idl; } /* * The conn is not in the drain list. Insert it at the * tail of the drain list. The drain list is circular * and doubly linked. idl_conn points to the 1st element * in the list. */ if (idl->idl_conn == NULL) { idl->idl_conn = connp; connp->conn_drain_next = connp; connp->conn_drain_prev = connp; } else { conn_t *head = idl->idl_conn; connp->conn_drain_next = head; connp->conn_drain_prev = head->conn_drain_prev; head->conn_drain_prev->conn_drain_next = connp; head->conn_drain_prev = connp; } mutex_exit(CONN_DRAIN_LIST_LOCK(connp)); } /* * This conn is closing, and we are called from ip_close. OR * This conn has been serviced by ip_wsrv, and we need to do the tail * processing. * If this conn is part of the drain list, we may need to sustain the drain * process by qenabling the next conn in the drain list. We may also need to * remove this conn from the list, if it is done. */ static void conn_drain_tail(conn_t *connp, boolean_t closing) { idl_t *idl; /* * connp->conn_idl is stable at this point, and no lock is needed * to check it. If we are called from ip_close, close has already * set CONN_CLOSING, thus freezing the value of conn_idl, and * called us only because conn_idl is non-null. If we are called thru * service, conn_idl could be null, but it cannot change because * service is single-threaded per queue, and there cannot be another * instance of service trying to call conn_drain_insert on this conn * now. */ ASSERT(!closing || (connp->conn_idl != NULL)); /* * If connp->conn_idl is null, the conn has not been inserted into any * drain list even once since creation of the conn. Just return. */ if (connp->conn_idl == NULL) return; mutex_enter(CONN_DRAIN_LIST_LOCK(connp)); if (connp->conn_drain_prev == NULL) { /* This conn is currently not in the drain list. */ mutex_exit(CONN_DRAIN_LIST_LOCK(connp)); return; } idl = connp->conn_idl; if (idl->idl_conn_draining == connp) { /* * This conn is the current drainer. If this is the last conn * in the drain list, we need to do more checks, in the 'if' * below. Otherwwise we need to just qenable the next conn, * to sustain the draining, and is handled in the 'else' * below. */ if (connp->conn_drain_next == idl->idl_conn) { /* * This conn is the last in this list. This round * of draining is complete. If idl_repeat is set, * it means another flow enabling has happened from * the driver/streams and we need to another round * of draining. * If there are more than 2 conns in the drain list, * do a left rotate by 1, so that all conns except the * conn at the head move towards the head by 1, and the * the conn at the head goes to the tail. This attempts * a more even share for all queues that are being * drained. */ if ((connp->conn_drain_next != connp) && (idl->idl_conn->conn_drain_next != connp)) { idl->idl_conn = idl->idl_conn->conn_drain_next; } if (idl->idl_repeat) { qenable(idl->idl_conn->conn_wq); idl->idl_conn_draining = idl->idl_conn; idl->idl_repeat = 0; } else { idl->idl_conn_draining = NULL; } } else { /* * If the next queue that we are now qenable'ing, * is closing, it will remove itself from this list * and qenable the subsequent queue in ip_close(). * Serialization is acheived thru idl_lock. */ qenable(connp->conn_drain_next->conn_wq); idl->idl_conn_draining = connp->conn_drain_next; } } if (!connp->conn_did_putbq || closing) { /* * Remove ourself from the drain list, if we did not do * a putbq, or if the conn is closing. * Note: It is possible that q->q_first is non-null. It means * that these messages landed after we did a enableok() in * ip_wsrv. Thus STREAMS will call ip_wsrv once again to * service them. */ if (connp->conn_drain_next == connp) { /* Singleton in the list */ ASSERT(connp->conn_drain_prev == connp); idl->idl_conn = NULL; idl->idl_conn_draining = NULL; } else { connp->conn_drain_prev->conn_drain_next = connp->conn_drain_next; connp->conn_drain_next->conn_drain_prev = connp->conn_drain_prev; if (idl->idl_conn == connp) idl->idl_conn = connp->conn_drain_next; ASSERT(idl->idl_conn_draining != connp); } connp->conn_drain_next = NULL; connp->conn_drain_prev = NULL; } mutex_exit(CONN_DRAIN_LIST_LOCK(connp)); } /* * Write service routine. Shared perimeter entry point. * ip_wsrv can be called in any of the following ways. * 1. The device queue's messages has fallen below the low water mark * and STREAMS has backenabled the ill_wq. We walk thru all the * the drain lists and backenable the first conn in each list. * 2. The above causes STREAMS to run ip_wsrv on the conn_wq of the * qenabled non-tcp upper layers. We start dequeing messages and call * ip_wput for each message. */ void ip_wsrv(queue_t *q) { conn_t *connp; ill_t *ill; mblk_t *mp; if (q->q_next) { ill = (ill_t *)q->q_ptr; if (ill->ill_state_flags == 0) { /* * The device flow control has opened up. * Walk through conn drain lists and qenable the * first conn in each list. This makes sense only * if the stream is fully plumbed and setup. * Hence the if check above. */ ip1dbg(("ip_wsrv: walking\n")); conn_walk_drain(); } return; } connp = Q_TO_CONN(q); ip1dbg(("ip_wsrv: %p %p\n", (void *)q, (void *)connp)); /* * 1. Set conn_draining flag to signal that service is active. * * 2. ip_output determines whether it has been called from service, * based on the last parameter. If it is IP_WSRV it concludes it * has been called from service. * * 3. Message ordering is preserved by the following logic. * i. A directly called ip_output (i.e. not thru service) will queue * the message at the tail, if conn_draining is set (i.e. service * is running) or if q->q_first is non-null. * * ii. If ip_output is called from service, and if ip_output cannot * putnext due to flow control, it does a putbq. * * 4. noenable the queue so that a putbq from ip_wsrv does not reenable * (causing an infinite loop). */ ASSERT(!connp->conn_did_putbq); while ((q->q_first != NULL) && !connp->conn_did_putbq) { connp->conn_draining = 1; noenable(q); while ((mp = getq(q)) != NULL) { ASSERT(CONN_Q(q)); ip_output(Q_TO_CONN(q), mp, q, IP_WSRV); if (connp->conn_did_putbq) { /* ip_wput did a putbq */ break; } } /* * At this point, a thread coming down from top, calling * ip_wput, may end up queueing the message. We have not yet * enabled the queue, so ip_wsrv won't be called again. * To avoid this race, check q->q_first again (in the loop) * If the other thread queued the message before we call * enableok(), we will catch it in the q->q_first check. * If the other thread queues the message after we call * enableok(), ip_wsrv will be called again by STREAMS. */ connp->conn_draining = 0; enableok(q); } /* Enable the next conn for draining */ conn_drain_tail(connp, B_FALSE); connp->conn_did_putbq = 0; } /* * Walk the list of all conn's calling the function provided with the * specified argument for each. Note that this only walks conn's that * have been bound. * Applies to both IPv4 and IPv6. */ static void conn_walk_fanout(pfv_t func, void *arg, zoneid_t zoneid) { conn_walk_fanout_table(ipcl_udp_fanout, ipcl_udp_fanout_size, func, arg, zoneid); conn_walk_fanout_table(ipcl_conn_fanout, ipcl_conn_fanout_size, func, arg, zoneid); conn_walk_fanout_table(ipcl_bind_fanout, ipcl_bind_fanout_size, func, arg, zoneid); conn_walk_fanout_table(ipcl_proto_fanout, A_CNT(ipcl_proto_fanout), func, arg, zoneid); conn_walk_fanout_table(ipcl_proto_fanout_v6, A_CNT(ipcl_proto_fanout_v6), func, arg, zoneid); } /* * Flowcontrol has relieved, and STREAMS has backenabled us. For each list * of conns that need to be drained, check if drain is already in progress. * If so set the idl_repeat bit, indicating that the last conn in the list * needs to reinitiate the drain once again, for the list. If drain is not * in progress for the list, initiate the draining, by qenabling the 1st * conn in the list. The drain is self-sustaining, each qenabled conn will * in turn qenable the next conn, when it is done/blocked/closing. */ static void conn_walk_drain(void) { int i; idl_t *idl; IP_STAT(ip_conn_walk_drain); for (i = 0; i < conn_drain_list_cnt; i++) { idl = &conn_drain_list[i]; mutex_enter(&idl->idl_lock); if (idl->idl_conn == NULL) { mutex_exit(&idl->idl_lock); continue; } /* * If this list is not being drained currently by * an ip_wsrv thread, start the process. */ if (idl->idl_conn_draining == NULL) { ASSERT(idl->idl_repeat == 0); qenable(idl->idl_conn->conn_wq); idl->idl_conn_draining = idl->idl_conn; } else { idl->idl_repeat = 1; } mutex_exit(&idl->idl_lock); } } /* * Walk an conn hash table of `count' buckets, calling func for each entry. */ static void conn_walk_fanout_table(connf_t *connfp, uint_t count, pfv_t func, void *arg, zoneid_t zoneid) { conn_t *connp; while (count-- > 0) { mutex_enter(&connfp->connf_lock); for (connp = connfp->connf_head; connp != NULL; connp = connp->conn_next) { if (zoneid == GLOBAL_ZONEID || zoneid == connp->conn_zoneid) { CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); (*func)(connp, arg); mutex_enter(&connfp->connf_lock); CONN_DEC_REF(connp); } } mutex_exit(&connfp->connf_lock); connfp++; } } /* ipcl_walk routine invoked for ip_conn_report for each conn. */ static void conn_report1(conn_t *connp, void *mp) { char buf1[INET6_ADDRSTRLEN]; char buf2[INET6_ADDRSTRLEN]; uint_t print_len, buf_len; ASSERT(connp != NULL); buf_len = ((mblk_t *)mp)->b_datap->db_lim - ((mblk_t *)mp)->b_wptr; if (buf_len <= 0) return; (void) inet_ntop(AF_INET6, &connp->conn_srcv6, buf1, sizeof (buf1)), (void) inet_ntop(AF_INET6, &connp->conn_remv6, buf2, sizeof (buf2)), print_len = snprintf((char *)((mblk_t *)mp)->b_wptr, buf_len, MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR MI_COL_PTRFMT_STR "%5d %s/%05d %s/%05d\n", (void *)connp, (void *)CONNP_TO_RQ(connp), (void *)CONNP_TO_WQ(connp), connp->conn_zoneid, buf1, connp->conn_lport, buf2, connp->conn_fport); if (print_len < buf_len) { ((mblk_t *)mp)->b_wptr += print_len; } else { ((mblk_t *)mp)->b_wptr += buf_len; } } /* * Named Dispatch routine to produce a formatted report on all conns * that are listed in one of the fanout tables. * This report is accessed by using the ndd utility to "get" ND variable * "ip_conn_status". */ /* ARGSUSED */ static int ip_conn_report(queue_t *q, mblk_t *mp, caddr_t arg, cred_t *ioc_cr) { (void) mi_mpprintf(mp, "CONN " MI_COL_HDRPAD_STR "rfq " MI_COL_HDRPAD_STR "stq " MI_COL_HDRPAD_STR " zone local remote"); /* * Because of the ndd constraint, at most we can have 64K buffer * to put in all conn info. So to be more efficient, just * allocate a 64K buffer here, assuming we need that large buffer. * This should be OK as only privileged processes can do ndd /dev/ip. */ if ((mp->b_cont = allocb(ND_MAX_BUF_LEN, BPRI_HI)) == NULL) { /* The following may work even if we cannot get a large buf. */ (void) mi_mpprintf(mp, "<< Out of buffer >>\n"); return (0); } conn_walk_fanout(conn_report1, mp->b_cont, Q_TO_CONN(q)->conn_zoneid); return (0); } /* * Determine if the ill and multicast aspects of that packets * "matches" the conn. */ boolean_t conn_wantpacket(conn_t *connp, ill_t *ill, ipha_t *ipha, int fanout_flags, zoneid_t zoneid) { ill_t *in_ill; boolean_t found; ipif_t *ipif; ire_t *ire; ipaddr_t dst, src; dst = ipha->ipha_dst; src = ipha->ipha_src; /* * conn_incoming_ill is set by IP_BOUND_IF which limits * unicast, broadcast and multicast reception to * conn_incoming_ill. conn_wantpacket itself is called * only for BROADCAST and multicast. * * 1) ip_rput supresses duplicate broadcasts if the ill * is part of a group. Hence, we should be receiving * just one copy of broadcast for the whole group. * Thus, if it is part of the group the packet could * come on any ill of the group and hence we need a * match on the group. Otherwise, match on ill should * be sufficient. * * 2) ip_rput does not suppress duplicate multicast packets. * If there are two interfaces in a ill group and we have * 2 applications (conns) joined a multicast group G on * both the interfaces, ilm_lookup_ill filter in ip_rput * will give us two packets because we join G on both the * interfaces rather than nominating just one interface * for receiving multicast like broadcast above. So, * we have to call ilg_lookup_ill to filter out duplicate * copies, if ill is part of a group. */ in_ill = connp->conn_incoming_ill; if (in_ill != NULL) { if (in_ill->ill_group == NULL) { if (in_ill != ill) return (B_FALSE); } else if (in_ill->ill_group != ill->ill_group) { return (B_FALSE); } } if (!CLASSD(dst)) { if (IPCL_ZONE_MATCH(connp, zoneid)) return (B_TRUE); /* * The conn is in a different zone; we need to check that this * broadcast address is configured in the application's zone and * on one ill in the group. */ ipif = ipif_get_next_ipif(NULL, ill); if (ipif == NULL) return (B_FALSE); ire = ire_ctable_lookup(dst, 0, IRE_BROADCAST, ipif, connp->conn_zoneid, NULL, (MATCH_IRE_TYPE | MATCH_IRE_ILL_GROUP)); ipif_refrele(ipif); if (ire != NULL) { ire_refrele(ire); return (B_TRUE); } else { return (B_FALSE); } } if ((fanout_flags & IP_FF_NO_MCAST_LOOP) && connp->conn_zoneid == zoneid) { /* * Loopback case: the sending endpoint has IP_MULTICAST_LOOP * disabled, therefore we don't dispatch the multicast packet to * the sending zone. */ return (B_FALSE); } if ((ill->ill_phyint->phyint_flags & PHYI_LOOPBACK) && connp->conn_zoneid != zoneid) { /* * Multicast packet on the loopback interface: we only match * conns who joined the group in the specified zone. */ return (B_FALSE); } if (connp->conn_multi_router) { /* multicast packet and multicast router socket: send up */ return (B_TRUE); } mutex_enter(&connp->conn_lock); found = (ilg_lookup_ill_withsrc(connp, dst, src, ill) != NULL); mutex_exit(&connp->conn_lock); return (found); } /* * Finish processing of "arp_up" when AR_DLPIOP_DONE is received from arp. */ /* ARGSUSED */ static void ip_arp_done(ipsq_t *dummy_sq, queue_t *q, mblk_t *mp, void *dummy_arg) { ill_t *ill = (ill_t *)q->q_ptr; mblk_t *mp1, *mp2; ipif_t *ipif; int err = 0; conn_t *connp = NULL; ipsq_t *ipsq; arc_t *arc; ip1dbg(("ip_arp_done(%s)\n", ill->ill_name)); ASSERT((mp->b_wptr - mp->b_rptr) >= sizeof (arc_t)); ASSERT(((arc_t *)mp->b_rptr)->arc_cmd == AR_DLPIOP_DONE); ASSERT(IAM_WRITER_ILL(ill)); mp2 = mp->b_cont; mp->b_cont = NULL; /* * We have now received the arp bringup completion message * from ARP. Mark the arp bringup as done. Also if the arp * stream has already started closing, send up the AR_ARP_CLOSING * ack now since ARP is waiting in close for this ack. */ mutex_enter(&ill->ill_lock); ill->ill_arp_bringup_pending = 0; if (ill->ill_arp_closing) { mutex_exit(&ill->ill_lock); /* Let's reuse the mp for sending the ack */ arc = (arc_t *)mp->b_rptr; mp->b_wptr = mp->b_rptr + sizeof (arc_t); arc->arc_cmd = AR_ARP_CLOSING; qreply(q, mp); } else { mutex_exit(&ill->ill_lock); freeb(mp); } /* We should have an IOCTL waiting on this. */ ipsq = ill->ill_phyint->phyint_ipsq; ipif = ipsq->ipsq_pending_ipif; mp1 = ipsq_pending_mp_get(ipsq, &connp); ASSERT(!((mp1 != NULL) ^ (ipif != NULL))); if (mp1 == NULL) { /* bringup was aborted by the user */ freemsg(mp2); return; } ASSERT(connp != NULL); q = CONNP_TO_WQ(connp); /* * If the DL_BIND_REQ fails, it is noted * in arc_name_offset. */ err = *((int *)mp2->b_rptr); if (err == 0) { if (ipif->ipif_isv6) { if ((err = ipif_up_done_v6(ipif)) != 0) ip0dbg(("ip_arp_done: init failed\n")); } else { if ((err = ipif_up_done(ipif)) != 0) ip0dbg(("ip_arp_done: init failed\n")); } } else { ip0dbg(("ip_arp_done: DL_BIND_REQ failed\n")); } freemsg(mp2); if ((err == 0) && (ill->ill_up_ipifs)) { err = ill_up_ipifs(ill, q, mp1); if (err == EINPROGRESS) return; } if (ill->ill_up_ipifs) { ill_group_cleanup(ill); } /* * The ioctl must complete now without EINPROGRESS * since ipsq_pending_mp_get has removed the ioctl mblk * from ipsq_pending_mp. Otherwise the ioctl will be * stuck for ever in the ipsq. */ ASSERT(err != EINPROGRESS); ip_ioctl_finish(q, mp1, err, NO_COPYOUT, ipif, ipsq); } /* Allocate the private structure */ static int ip_priv_alloc(void **bufp) { void *buf; if ((buf = kmem_alloc(sizeof (ip_priv_t), KM_NOSLEEP)) == NULL) return (ENOMEM); *bufp = buf; return (0); } /* Function to delete the private structure */ void ip_priv_free(void *buf) { ASSERT(buf != NULL); kmem_free(buf, sizeof (ip_priv_t)); } /* * The entry point for IPPF processing. * If the classifier (IPGPC_CLASSIFY) is not loaded and configured, the * routine just returns. * * When called, ip_process generates an ipp_packet_t structure * which holds the state information for this packet and invokes the * the classifier (via ipp_packet_process). The classification, depending on * configured filters, results in a list of actions for this packet. Invoking * an action may cause the packet to be dropped, in which case the resulting * mblk (*mpp) is NULL. proc indicates the callout position for * this packet and ill_index is the interface this packet on or will leave * on (inbound and outbound resp.). */ void ip_process(ip_proc_t proc, mblk_t **mpp, uint32_t ill_index) { mblk_t *mp; ip_priv_t *priv; ipp_action_id_t aid; int rc = 0; ipp_packet_t *pp; #define IP_CLASS "ip" /* If the classifier is not loaded, return */ if ((aid = ipp_action_lookup(IPGPC_CLASSIFY)) == IPP_ACTION_INVAL) { return; } mp = *mpp; ASSERT(mp != NULL); /* Allocate the packet structure */ rc = ipp_packet_alloc(&pp, IP_CLASS, aid); if (rc != 0) { *mpp = NULL; freemsg(mp); return; } /* Allocate the private structure */ rc = ip_priv_alloc((void **)&priv); if (rc != 0) { *mpp = NULL; freemsg(mp); ipp_packet_free(pp); return; } priv->proc = proc; priv->ill_index = ill_index; ipp_packet_set_private(pp, priv, ip_priv_free); ipp_packet_set_data(pp, mp); /* Invoke the classifier */ rc = ipp_packet_process(&pp); if (pp != NULL) { mp = ipp_packet_get_data(pp); ipp_packet_free(pp); if (rc != 0) { freemsg(mp); *mpp = NULL; } } else { *mpp = NULL; } #undef IP_CLASS } /* * Propagate a multicast group membership operation (add/drop) on * all the interfaces crossed by the related multirt routes. * The call is considered successful if the operation succeeds * on at least one interface. */ static int ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t, ipaddr_t, ipaddr_t, uint_t *, mcast_record_t, ipaddr_t, mblk_t *), ire_t *ire, conn_t *connp, boolean_t checkonly, ipaddr_t group, mcast_record_t fmode, ipaddr_t src, mblk_t *first_mp) { ire_t *ire_gw; irb_t *irb; int error = 0; opt_restart_t *or; irb = ire->ire_bucket; ASSERT(irb != NULL); ASSERT(DB_TYPE(first_mp) == M_CTL); or = (opt_restart_t *)first_mp->b_rptr; IRB_REFHOLD(irb); for (; ire != NULL; ire = ire->ire_next) { if ((ire->ire_flags & RTF_MULTIRT) == 0) continue; if (ire->ire_addr != group) continue; ire_gw = ire_ftable_lookup(ire->ire_gateway_addr, 0, 0, IRE_INTERFACE, NULL, NULL, ALL_ZONES, 0, NULL, MATCH_IRE_RECURSIVE | MATCH_IRE_TYPE); /* No resolver exists for the gateway; skip this ire. */ if (ire_gw == NULL) continue; /* * This function can return EINPROGRESS. If so the operation * will be restarted from ip_restart_optmgmt which will * call ip_opt_set and option processing will restart for * this option. So we may end up calling 'fn' more than once. * This requires that 'fn' is idempotent except for the * return value. The operation is considered a success if * it succeeds at least once on any one interface. */ error = fn(connp, checkonly, group, ire_gw->ire_src_addr, NULL, fmode, src, first_mp); if (error == 0) or->or_private = CGTP_MCAST_SUCCESS; if (ip_debug > 0) { ulong_t off; char *ksym; ksym = kobj_getsymname((uintptr_t)fn, &off); ip2dbg(("ip_multirt_apply_membership: " "called %s, multirt group 0x%08x via itf 0x%08x, " "error %d [success %u]\n", ksym ? ksym : "?", ntohl(group), ntohl(ire_gw->ire_src_addr), error, or->or_private)); } ire_refrele(ire_gw); if (error == EINPROGRESS) { IRB_REFRELE(irb); return (error); } } IRB_REFRELE(irb); /* * Consider the call as successful if we succeeded on at least * one interface. Otherwise, return the last encountered error. */ return (or->or_private == CGTP_MCAST_SUCCESS ? 0 : error); } /* * Issue a warning regarding a route crossing an interface with an * incorrect MTU. Only one message every 'ip_multirt_log_interval' * amount of time is logged. */ static void ip_multirt_bad_mtu(ire_t *ire, uint32_t max_frag) { hrtime_t current = gethrtime(); char buf[INET_ADDRSTRLEN]; /* Convert interval in ms to hrtime in ns */ if (multirt_bad_mtu_last_time + ((hrtime_t)ip_multirt_log_interval * (hrtime_t)1000000) <= current) { cmn_err(CE_WARN, "ip: ignoring multiroute " "to %s, incorrect MTU %u (expected %u)\n", ip_dot_addr(ire->ire_addr, buf), ire->ire_max_frag, max_frag); multirt_bad_mtu_last_time = current; } } /* * Get the CGTP (multirouting) filtering status. * If 0, the CGTP hooks are transparent. */ /* ARGSUSED */ static int ip_cgtp_filter_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *ioc_cr) { boolean_t *ip_cgtp_filter_value = (boolean_t *)cp; (void) mi_mpprintf(mp, "%d", (int)*ip_cgtp_filter_value); return (0); } /* * Set the CGTP (multirouting) filtering status. * If the status is changed from active to transparent * or from transparent to active, forward the new status * to the filtering module (if loaded). */ /* ARGSUSED */ static int ip_cgtp_filter_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *ioc_cr) { long new_value; boolean_t *ip_cgtp_filter_value = (boolean_t *)cp; if (ddi_strtol(value, NULL, 10, &new_value) != 0 || new_value < 0 || new_value > 1) { return (EINVAL); } /* * Do not enable CGTP filtering - thus preventing the hooks * from being invoked - if the version number of the * filtering module hooks does not match. */ if ((ip_cgtp_filter_ops != NULL) && (ip_cgtp_filter_ops->cfo_filter_rev != CGTP_FILTER_REV)) { cmn_err(CE_WARN, "IP: CGTP filtering version mismatch " "(module hooks version %d, expecting %d)\n", ip_cgtp_filter_ops->cfo_filter_rev, CGTP_FILTER_REV); return (ENOTSUP); } if ((!*ip_cgtp_filter_value) && new_value) { cmn_err(CE_NOTE, "IP: enabling CGTP filtering%s", ip_cgtp_filter_ops == NULL ? " (module not loaded)" : ""); } if (*ip_cgtp_filter_value && (!new_value)) { cmn_err(CE_NOTE, "IP: disabling CGTP filtering%s", ip_cgtp_filter_ops == NULL ? " (module not loaded)" : ""); } if (ip_cgtp_filter_ops != NULL) { int res; if ((res = ip_cgtp_filter_ops->cfo_change_state(new_value))) { return (res); } } *ip_cgtp_filter_value = (boolean_t)new_value; return (0); } /* * Return the expected CGTP hooks version number. */ int ip_cgtp_filter_supported(void) { return (ip_cgtp_filter_rev); } /* * CGTP hooks can be registered by directly touching ip_cgtp_filter_ops * or by invoking this function. In the first case, the version number * of the registered structure is checked at hooks activation time * in ip_cgtp_filter_set(). */ int ip_cgtp_filter_register(cgtp_filter_ops_t *ops) { if (ops->cfo_filter_rev != CGTP_FILTER_REV) return (ENOTSUP); ip_cgtp_filter_ops = ops; return (0); } static squeue_func_t ip_squeue_switch(int val) { squeue_func_t rval = squeue_fill; switch (val) { case IP_SQUEUE_ENTER_NODRAIN: rval = squeue_enter_nodrain; break; case IP_SQUEUE_ENTER: rval = squeue_enter; break; default: break; } return (rval); } /* ARGSUSED */ static int ip_input_proc_set(queue_t *q, mblk_t *mp, char *value, caddr_t addr, cred_t *cr) { int *v = (int *)addr; long new_value; if (ddi_strtol(value, NULL, 10, &new_value) != 0) return (EINVAL); ip_input_proc = ip_squeue_switch(new_value); *v = new_value; return (0); } /* ARGSUSED */ static int ip_int_set(queue_t *q, mblk_t *mp, char *value, caddr_t addr, cred_t *cr) { int *v = (int *)addr; long new_value; if (ddi_strtol(value, NULL, 10, &new_value) != 0) return (EINVAL); *v = new_value; return (0); } static void ip_kstat_init(void) { ip_named_kstat_t template = { { "forwarding", KSTAT_DATA_UINT32, 0 }, { "defaultTTL", KSTAT_DATA_UINT32, 0 }, { "inReceives", KSTAT_DATA_UINT32, 0 }, { "inHdrErrors", KSTAT_DATA_UINT32, 0 }, { "inAddrErrors", KSTAT_DATA_UINT32, 0 }, { "forwDatagrams", KSTAT_DATA_UINT32, 0 }, { "inUnknownProtos", KSTAT_DATA_UINT32, 0 }, { "inDiscards", KSTAT_DATA_UINT32, 0 }, { "inDelivers", KSTAT_DATA_UINT32, 0 }, { "outRequests", KSTAT_DATA_UINT32, 0 }, { "outDiscards", KSTAT_DATA_UINT32, 0 }, { "outNoRoutes", KSTAT_DATA_UINT32, 0 }, { "reasmTimeout", KSTAT_DATA_UINT32, 0 }, { "reasmReqds", KSTAT_DATA_UINT32, 0 }, { "reasmOKs", KSTAT_DATA_UINT32, 0 }, { "reasmFails", KSTAT_DATA_UINT32, 0 }, { "fragOKs", KSTAT_DATA_UINT32, 0 }, { "fragFails", KSTAT_DATA_UINT32, 0 }, { "fragCreates", KSTAT_DATA_UINT32, 0 }, { "addrEntrySize", KSTAT_DATA_INT32, 0 }, { "routeEntrySize", KSTAT_DATA_INT32, 0 }, { "netToMediaEntrySize", KSTAT_DATA_INT32, 0 }, { "routingDiscards", KSTAT_DATA_UINT32, 0 }, { "inErrs", KSTAT_DATA_UINT32, 0 }, { "noPorts", KSTAT_DATA_UINT32, 0 }, { "inCksumErrs", KSTAT_DATA_UINT32, 0 }, { "reasmDuplicates", KSTAT_DATA_UINT32, 0 }, { "reasmPartDups", KSTAT_DATA_UINT32, 0 }, { "forwProhibits", KSTAT_DATA_UINT32, 0 }, { "udpInCksumErrs", KSTAT_DATA_UINT32, 0 }, { "udpInOverflows", KSTAT_DATA_UINT32, 0 }, { "rawipInOverflows", KSTAT_DATA_UINT32, 0 }, { "ipsecInSucceeded", KSTAT_DATA_UINT32, 0 }, { "ipsecInFailed", KSTAT_DATA_INT32, 0 }, { "memberEntrySize", KSTAT_DATA_INT32, 0 }, { "inIPv6", KSTAT_DATA_UINT32, 0 }, { "outIPv6", KSTAT_DATA_UINT32, 0 }, { "outSwitchIPv6", KSTAT_DATA_UINT32, 0 }, }; ip_mibkp = kstat_create("ip", 0, "ip", "mib2", KSTAT_TYPE_NAMED, NUM_OF_FIELDS(ip_named_kstat_t), 0); if (!ip_mibkp) return; template.forwarding.value.ui32 = WE_ARE_FORWARDING ? 1:2; template.defaultTTL.value.ui32 = (uint32_t)ip_def_ttl; template.reasmTimeout.value.ui32 = ip_g_frag_timeout; template.addrEntrySize.value.i32 = sizeof (mib2_ipAddrEntry_t); template.routeEntrySize.value.i32 = sizeof (mib2_ipRouteEntry_t); template.netToMediaEntrySize.value.i32 = sizeof (mib2_ipNetToMediaEntry_t); template.memberEntrySize.value.i32 = sizeof (ipv6_member_t); bcopy(&template, ip_mibkp->ks_data, sizeof (template)); ip_mibkp->ks_update = ip_kstat_update; kstat_install(ip_mibkp); } static void ip_kstat_fini(void) { if (ip_mibkp != NULL) { kstat_delete(ip_mibkp); ip_mibkp = NULL; } } static int ip_kstat_update(kstat_t *kp, int rw) { ip_named_kstat_t *ipkp; if (!kp || !kp->ks_data) return (EIO); if (rw == KSTAT_WRITE) return (EACCES); ipkp = (ip_named_kstat_t *)kp->ks_data; ipkp->forwarding.value.ui32 = ip_mib.ipForwarding; ipkp->defaultTTL.value.ui32 = ip_mib.ipDefaultTTL; ipkp->inReceives.value.ui32 = ip_mib.ipInReceives; ipkp->inHdrErrors.value.ui32 = ip_mib.ipInHdrErrors; ipkp->inAddrErrors.value.ui32 = ip_mib.ipInAddrErrors; ipkp->forwDatagrams.value.ui32 = ip_mib.ipForwDatagrams; ipkp->inUnknownProtos.value.ui32 = ip_mib.ipInUnknownProtos; ipkp->inDiscards.value.ui32 = ip_mib.ipInDiscards; ipkp->inDelivers.value.ui32 = ip_mib.ipInDelivers; ipkp->outRequests.value.ui32 = ip_mib.ipOutRequests; ipkp->outDiscards.value.ui32 = ip_mib.ipOutDiscards; ipkp->outNoRoutes.value.ui32 = ip_mib.ipOutNoRoutes; ipkp->reasmTimeout.value.ui32 = ip_mib.ipReasmTimeout; ipkp->reasmReqds.value.ui32 = ip_mib.ipReasmReqds; ipkp->reasmOKs.value.ui32 = ip_mib.ipReasmOKs; ipkp->reasmFails.value.ui32 = ip_mib.ipReasmFails; ipkp->fragOKs.value.ui32 = ip_mib.ipFragOKs; ipkp->fragFails.value.ui32 = ip_mib.ipFragFails; ipkp->fragCreates.value.ui32 = ip_mib.ipFragCreates; ipkp->routingDiscards.value.ui32 = ip_mib.ipRoutingDiscards; ipkp->inErrs.value.ui32 = ip_mib.tcpInErrs; ipkp->noPorts.value.ui32 = ip_mib.udpNoPorts; ipkp->inCksumErrs.value.ui32 = ip_mib.ipInCksumErrs; ipkp->reasmDuplicates.value.ui32 = ip_mib.ipReasmDuplicates; ipkp->reasmPartDups.value.ui32 = ip_mib.ipReasmPartDups; ipkp->forwProhibits.value.ui32 = ip_mib.ipForwProhibits; ipkp->udpInCksumErrs.value.ui32 = ip_mib.udpInCksumErrs; ipkp->udpInOverflows.value.ui32 = ip_mib.udpInOverflows; ipkp->rawipInOverflows.value.ui32 = ip_mib.rawipInOverflows; ipkp->ipsecInSucceeded.value.ui32 = ip_mib.ipsecInSucceeded; ipkp->ipsecInFailed.value.i32 = ip_mib.ipsecInFailed; ipkp->inIPv6.value.ui32 = ip_mib.ipInIPv6; ipkp->outIPv6.value.ui32 = ip_mib.ipOutIPv6; ipkp->outSwitchIPv6.value.ui32 = ip_mib.ipOutSwitchIPv6; return (0); } static void icmp_kstat_init(void) { icmp_named_kstat_t template = { { "inMsgs", KSTAT_DATA_UINT32 }, { "inErrors", KSTAT_DATA_UINT32 }, { "inDestUnreachs", KSTAT_DATA_UINT32 }, { "inTimeExcds", KSTAT_DATA_UINT32 }, { "inParmProbs", KSTAT_DATA_UINT32 }, { "inSrcQuenchs", KSTAT_DATA_UINT32 }, { "inRedirects", KSTAT_DATA_UINT32 }, { "inEchos", KSTAT_DATA_UINT32 }, { "inEchoReps", KSTAT_DATA_UINT32 }, { "inTimestamps", KSTAT_DATA_UINT32 }, { "inTimestampReps", KSTAT_DATA_UINT32 }, { "inAddrMasks", KSTAT_DATA_UINT32 }, { "inAddrMaskReps", KSTAT_DATA_UINT32 }, { "outMsgs", KSTAT_DATA_UINT32 }, { "outErrors", KSTAT_DATA_UINT32 }, { "outDestUnreachs", KSTAT_DATA_UINT32 }, { "outTimeExcds", KSTAT_DATA_UINT32 }, { "outParmProbs", KSTAT_DATA_UINT32 }, { "outSrcQuenchs", KSTAT_DATA_UINT32 }, { "outRedirects", KSTAT_DATA_UINT32 }, { "outEchos", KSTAT_DATA_UINT32 }, { "outEchoReps", KSTAT_DATA_UINT32 }, { "outTimestamps", KSTAT_DATA_UINT32 }, { "outTimestampReps", KSTAT_DATA_UINT32 }, { "outAddrMasks", KSTAT_DATA_UINT32 }, { "outAddrMaskReps", KSTAT_DATA_UINT32 }, { "inChksumErrs", KSTAT_DATA_UINT32 }, { "inUnknowns", KSTAT_DATA_UINT32 }, { "inFragNeeded", KSTAT_DATA_UINT32 }, { "outFragNeeded", KSTAT_DATA_UINT32 }, { "outDrops", KSTAT_DATA_UINT32 }, { "inOverFlows", KSTAT_DATA_UINT32 }, { "inBadRedirects", KSTAT_DATA_UINT32 }, }; icmp_mibkp = kstat_create("ip", 0, "icmp", "mib2", KSTAT_TYPE_NAMED, NUM_OF_FIELDS(icmp_named_kstat_t), 0); if (icmp_mibkp == NULL) return; bcopy(&template, icmp_mibkp->ks_data, sizeof (template)); icmp_mibkp->ks_update = icmp_kstat_update; kstat_install(icmp_mibkp); } static void icmp_kstat_fini(void) { if (icmp_mibkp != NULL) { kstat_delete(icmp_mibkp); icmp_mibkp = NULL; } } static int icmp_kstat_update(kstat_t *kp, int rw) { icmp_named_kstat_t *icmpkp; if ((kp == NULL) || (kp->ks_data == NULL)) return (EIO); if (rw == KSTAT_WRITE) return (EACCES); icmpkp = (icmp_named_kstat_t *)kp->ks_data; icmpkp->inMsgs.value.ui32 = icmp_mib.icmpInMsgs; icmpkp->inErrors.value.ui32 = icmp_mib.icmpInErrors; icmpkp->inDestUnreachs.value.ui32 = icmp_mib.icmpInDestUnreachs; icmpkp->inTimeExcds.value.ui32 = icmp_mib.icmpInTimeExcds; icmpkp->inParmProbs.value.ui32 = icmp_mib.icmpInParmProbs; icmpkp->inSrcQuenchs.value.ui32 = icmp_mib.icmpInSrcQuenchs; icmpkp->inRedirects.value.ui32 = icmp_mib.icmpInRedirects; icmpkp->inEchos.value.ui32 = icmp_mib.icmpInEchos; icmpkp->inEchoReps.value.ui32 = icmp_mib.icmpInEchoReps; icmpkp->inTimestamps.value.ui32 = icmp_mib.icmpInTimestamps; icmpkp->inTimestampReps.value.ui32 = icmp_mib.icmpInTimestampReps; icmpkp->inAddrMasks.value.ui32 = icmp_mib.icmpInAddrMasks; icmpkp->inAddrMaskReps.value.ui32 = icmp_mib.icmpInAddrMaskReps; icmpkp->outMsgs.value.ui32 = icmp_mib.icmpOutMsgs; icmpkp->outErrors.value.ui32 = icmp_mib.icmpOutErrors; icmpkp->outDestUnreachs.value.ui32 = icmp_mib.icmpOutDestUnreachs; icmpkp->outTimeExcds.value.ui32 = icmp_mib.icmpOutTimeExcds; icmpkp->outParmProbs.value.ui32 = icmp_mib.icmpOutParmProbs; icmpkp->outSrcQuenchs.value.ui32 = icmp_mib.icmpOutSrcQuenchs; icmpkp->outRedirects.value.ui32 = icmp_mib.icmpOutRedirects; icmpkp->outEchos.value.ui32 = icmp_mib.icmpOutEchos; icmpkp->outEchoReps.value.ui32 = icmp_mib.icmpOutEchoReps; icmpkp->outTimestamps.value.ui32 = icmp_mib.icmpOutTimestamps; icmpkp->outTimestampReps.value.ui32 = icmp_mib.icmpOutTimestampReps; icmpkp->outAddrMasks.value.ui32 = icmp_mib.icmpOutAddrMasks; icmpkp->outAddrMaskReps.value.ui32 = icmp_mib.icmpOutAddrMaskReps; icmpkp->inCksumErrs.value.ui32 = icmp_mib.icmpInCksumErrs; icmpkp->inUnknowns.value.ui32 = icmp_mib.icmpInUnknowns; icmpkp->inFragNeeded.value.ui32 = icmp_mib.icmpInFragNeeded; icmpkp->outFragNeeded.value.ui32 = icmp_mib.icmpOutFragNeeded; icmpkp->outDrops.value.ui32 = icmp_mib.icmpOutDrops; icmpkp->inOverflows.value.ui32 = icmp_mib.icmpInOverflows; icmpkp->inBadRedirects.value.ui32 = icmp_mib.icmpInBadRedirects; return (0); } /* * This is the fanout function for raw socket opened for SCTP. Note * that it is called after SCTP checks that there is no socket which * wants a packet. Then before SCTP handles this out of the blue packet, * this function is called to see if there is any raw socket for SCTP. * If there is and it is bound to the correct address, the packet will * be sent to that socket. Note that only one raw socket can be bound to * a port. This is assured in ipcl_sctp_hash_insert(); */ void ip_fanout_sctp_raw(mblk_t *mp, ill_t *recv_ill, ipha_t *ipha, boolean_t isv4, uint32_t ports, boolean_t mctl_present, uint_t flags, boolean_t ip_policy, uint_t ipif_seqid, zoneid_t zoneid) { conn_t *connp; queue_t *rq; mblk_t *first_mp; boolean_t secure; ip6_t *ip6h; first_mp = mp; if (mctl_present) { mp = first_mp->b_cont; secure = ipsec_in_is_secure(first_mp); ASSERT(mp != NULL); } else { secure = B_FALSE; } ip6h = (isv4) ? NULL : (ip6_t *)ipha; connp = ipcl_classify_raw(mp, IPPROTO_SCTP, zoneid, ports, ipha); if (connp == NULL) { sctp_ootb_input(first_mp, recv_ill, ipif_seqid, zoneid, mctl_present); return; } rq = connp->conn_rq; if (!canputnext(rq)) { CONN_DEC_REF(connp); BUMP_MIB(&ip_mib, rawipInOverflows); freemsg(first_mp); return; } if ((isv4 ? CONN_INBOUND_POLICY_PRESENT(connp) : CONN_INBOUND_POLICY_PRESENT_V6(connp)) || secure) { first_mp = ipsec_check_inbound_policy(first_mp, connp, (isv4 ? ipha : NULL), ip6h, mctl_present); if (first_mp == NULL) { CONN_DEC_REF(connp); return; } } /* * We probably should not send M_CTL message up to * raw socket. */ if (mctl_present) freeb(first_mp); /* Initiate IPPF processing here if needed. */ if ((isv4 && IPP_ENABLED(IPP_LOCAL_IN) && ip_policy) || (!isv4 && IP6_IN_IPP(flags))) { ip_process(IPP_LOCAL_IN, &mp, recv_ill->ill_phyint->phyint_ifindex); if (mp == NULL) { CONN_DEC_REF(connp); return; } } if (connp->conn_recvif || connp->conn_recvslla || ((connp->conn_ipv6_recvpktinfo || (!isv4 && IN6_IS_ADDR_LINKLOCAL(&ip6h->ip6_src))) && (flags & IP_FF_IP6INFO))) { int in_flags = 0; if (connp->conn_recvif || connp->conn_ipv6_recvpktinfo) { in_flags = IPF_RECVIF; } if (connp->conn_recvslla) { in_flags |= IPF_RECVSLLA; } if (isv4) { mp = ip_add_info(mp, recv_ill, in_flags); } else { mp = ip_add_info_v6(mp, recv_ill, &ip6h->ip6_dst); if (mp == NULL) { CONN_DEC_REF(connp); return; } } } BUMP_MIB(&ip_mib, ipInDelivers); /* * We are sending the IPSEC_IN message also up. Refer * to comments above this function. */ putnext(rq, mp); CONN_DEC_REF(connp); } /* * This function should be called only if all packet processing * including fragmentation is complete. Callers of this function * must set mp->b_prev to one of these values: * {0, IPP_FWD_OUT, IPP_LOCAL_OUT} * prior to handing over the mp as first argument to this function. * * If the ire passed by caller is incomplete, this function * queues the packet and if necessary, sends ARP request and bails. * If the ire passed is fully resolved, we simply prepend * the link-layer header to the packet, do ipsec hw acceleration * work if necessary, and send the packet out on the wire. * * NOTE: IPSEC will only call this function with fully resolved * ires if hw acceleration is involved. * TODO list : * a Handle M_MULTIDATA so that * tcp_multisend->tcp_multisend_data can * call ip_xmit_v4 directly * b Handle post-ARP work for fragments so that * ip_wput_frag can call this function. */ ipxmit_state_t ip_xmit_v4(mblk_t *mp, ire_t *ire, ipsec_out_t *io, boolean_t flow_ctl_enabled) { nce_t *arpce; queue_t *q; int ill_index; mblk_t *nxt_mp, *first_mp; boolean_t xmit_drop = B_FALSE; ip_proc_t proc; ill_t *out_ill; arpce = ire->ire_nce; ASSERT(arpce != NULL); DTRACE_PROBE2(ip__xmit__v4, ire_t *, ire, nce_t *, arpce); mutex_enter(&arpce->nce_lock); switch (arpce->nce_state) { case ND_REACHABLE: /* If there are other queued packets, queue this packet */ if (arpce->nce_qd_mp != NULL) { if (mp != NULL) nce_queue_mp_common(arpce, mp, B_FALSE); mp = arpce->nce_qd_mp; } arpce->nce_qd_mp = NULL; mutex_exit(&arpce->nce_lock); /* * Flush the queue. In the common case, where the * ARP is already resolved, it will go through the * while loop only once. */ while (mp != NULL) { nxt_mp = mp->b_next; mp->b_next = NULL; /* * This info is needed for IPQOS to do COS marking * in ip_wput_attach_llhdr->ip_process. */ proc = (ip_proc_t)(uintptr_t)mp->b_prev; mp->b_prev = NULL; /* set up ill index for outbound qos processing */ out_ill = ire->ire_ipif->ipif_ill; ill_index = out_ill->ill_phyint->phyint_ifindex; first_mp = ip_wput_attach_llhdr(mp, ire, proc, ill_index); if (first_mp == NULL) { xmit_drop = B_TRUE; if (proc == IPP_FWD_OUT) { BUMP_MIB(&ip_mib, ipInDiscards); } else { BUMP_MIB(&ip_mib, ipOutDiscards); } goto next_mp; } /* non-ipsec hw accel case */ if (io == NULL || !io->ipsec_out_accelerated) { /* send it */ q = ire->ire_stq; if (proc == IPP_FWD_OUT) { UPDATE_IB_PKT_COUNT(ire); } else { UPDATE_OB_PKT_COUNT(ire); } ire->ire_last_used_time = lbolt; if (flow_ctl_enabled || canputnext(q)) { if (proc == IPP_FWD_OUT) { BUMP_MIB(&ip_mib, ipForwDatagrams); } if (mp == NULL) goto next_mp; putnext(q, first_mp); } else { BUMP_MIB(&ip_mib, ipOutDiscards); xmit_drop = B_TRUE; freemsg(first_mp); } } else { /* * Safety Pup says: make sure this * is going to the right interface! */ ill_t *ill1 = (ill_t *)ire->ire_stq->q_ptr; int ifindex = ill1->ill_phyint->phyint_ifindex; if (ifindex != io->ipsec_out_capab_ill_index) { xmit_drop = B_TRUE; freemsg(mp); } else { ipsec_hw_putnext(ire->ire_stq, mp); } } next_mp: mp = nxt_mp; } /* while (mp != NULL) */ if (xmit_drop) return (SEND_FAILED); else return (SEND_PASSED); case ND_INITIAL: case ND_INCOMPLETE: /* * While we do send off packets to dests that * use fully-resolved CGTP routes, we do not * handle unresolved CGTP routes. */ ASSERT(!(ire->ire_flags & RTF_MULTIRT)); ASSERT(io == NULL || !io->ipsec_out_accelerated); if (mp != NULL) { /* queue the packet */ nce_queue_mp_common(arpce, mp, B_FALSE); } if (arpce->nce_state == ND_INCOMPLETE) { mutex_exit(&arpce->nce_lock); DTRACE_PROBE3(ip__xmit__incomplete, (ire_t *), ire, (mblk_t *), mp, (ipsec_out_t *), io); return (LOOKUP_IN_PROGRESS); } arpce->nce_state = ND_INCOMPLETE; mutex_exit(&arpce->nce_lock); /* * Note that ire_add() (called from ire_forward()) * holds a ref on the ire until ARP is completed. */ ire_arpresolve(ire, ire_to_ill(ire)); return (LOOKUP_IN_PROGRESS); default: ASSERT(0); mutex_exit(&arpce->nce_lock); return (LLHDR_RESLV_FAILED); } } /* * Return B_TRUE if the buffers differ in length or content. * This is used for comparing extension header buffers. * Note that an extension header would be declared different * even if all that changed was the next header value in that header i.e. * what really changed is the next extension header. */ boolean_t ip_cmpbuf(const void *abuf, uint_t alen, boolean_t b_valid, const void *bbuf, uint_t blen) { if (!b_valid) blen = 0; if (alen != blen) return (B_TRUE); if (alen == 0) return (B_FALSE); /* Both zero length */ return (bcmp(abuf, bbuf, alen)); } /* * Preallocate memory for ip_savebuf(). Returns B_TRUE if ok. * Return B_FALSE if memory allocation fails - don't change any state! */ boolean_t ip_allocbuf(void **dstp, uint_t *dstlenp, boolean_t src_valid, const void *src, uint_t srclen) { void *dst; if (!src_valid) srclen = 0; ASSERT(*dstlenp == 0); if (src != NULL && srclen != 0) { dst = mi_alloc(srclen, BPRI_MED); if (dst == NULL) return (B_FALSE); } else { dst = NULL; } if (*dstp != NULL) mi_free(*dstp); *dstp = dst; *dstlenp = dst == NULL ? 0 : srclen; return (B_TRUE); } /* * Replace what is in *dst, *dstlen with the source. * Assumes ip_allocbuf has already been called. */ void ip_savebuf(void **dstp, uint_t *dstlenp, boolean_t src_valid, const void *src, uint_t srclen) { if (!src_valid) srclen = 0; ASSERT(*dstlenp == srclen); if (src != NULL && srclen != 0) bcopy(src, *dstp, srclen); } /* * Free the storage pointed to by the members of an ip6_pkt_t. */ void ip6_pkt_free(ip6_pkt_t *ipp) { ASSERT(ipp->ipp_pathmtu == NULL && !(ipp->ipp_fields & IPPF_PATHMTU)); if (ipp->ipp_fields & IPPF_HOPOPTS) { kmem_free(ipp->ipp_hopopts, ipp->ipp_hopoptslen); ipp->ipp_hopopts = NULL; ipp->ipp_hopoptslen = 0; } if (ipp->ipp_fields & IPPF_RTDSTOPTS) { kmem_free(ipp->ipp_rtdstopts, ipp->ipp_rtdstoptslen); ipp->ipp_rtdstopts = NULL; ipp->ipp_rtdstoptslen = 0; } if (ipp->ipp_fields & IPPF_DSTOPTS) { kmem_free(ipp->ipp_dstopts, ipp->ipp_dstoptslen); ipp->ipp_dstopts = NULL; ipp->ipp_dstoptslen = 0; } if (ipp->ipp_fields & IPPF_RTHDR) { kmem_free(ipp->ipp_rthdr, ipp->ipp_rthdrlen); ipp->ipp_rthdr = NULL; ipp->ipp_rthdrlen = 0; } ipp->ipp_fields &= ~(IPPF_HOPOPTS | IPPF_RTDSTOPTS | IPPF_DSTOPTS | IPPF_RTHDR); }