/* * 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 (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 1990 Mentat Inc. * Copyright (c) 2012 Joyent, Inc. All rights reserved. * Copyright (c) 2014, OmniTI Computer Consulting, Inc. All rights reserved. */ #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 #include #include #include /* For LBOLT_FASTPATH{,64} */ /* * Values for squeue switch: * IP_SQUEUE_ENTER_NODRAIN: SQ_NODRAIN * IP_SQUEUE_ENTER: SQ_PROCESS * IP_SQUEUE_FILL: SQ_FILL */ int ip_squeue_enter = IP_SQUEUE_ENTER; /* Setable in /etc/system */ int ip_squeue_flag; /* * Setable in /etc/system */ int ip_poll_normal_ms = 100; int ip_poll_normal_ticks = 0; int ip_modclose_ackwait_ms = 3000; /* * It would be nice to have these present only in DEBUG systems, but the * current design of the global symbol checking logic requires them to be * unconditionally present. */ uint_t ip_thread_data; /* TSD key for debug support */ krwlock_t ip_thread_rwlock; list_t ip_thread_list; /* * 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; uint_t ird_flags; /* see below */ listptr_t ird_route; /* ipRouteEntryTable */ listptr_t ird_netmedia; /* ipNetToMediaEntryTable */ listptr_t ird_attrs; /* ipRouteAttributeTable */ } iproutedata_t; /* Include ire_testhidden and IRE_IF_CLONE routes */ #define IRD_REPORT_ALL 0x01 /* * 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)(netstackid_t stack_id, uint8_t protocol, sa_family_t addr_family, uint8_t *laddrp, void *args) = NULL; /* * Hook function to generate cluster wide ip fragment identifier */ uint32_t (*cl_inet_ipident)(netstackid_t stack_id, uint8_t protocol, sa_family_t addr_family, uint8_t *laddrp, uint8_t *faddrp, void *args) = NULL; /* * Hook function to generate cluster wide SPI. */ void (*cl_inet_getspi)(netstackid_t, uint8_t, uint8_t *, size_t, void *) = NULL; /* * Hook function to verify if the SPI is already utlized. */ int (*cl_inet_checkspi)(netstackid_t, uint8_t, uint32_t, void *) = NULL; /* * Hook function to delete the SPI from the cluster wide repository. */ void (*cl_inet_deletespi)(netstackid_t, uint8_t, uint32_t, void *) = NULL; /* * Hook function to inform the cluster when packet received on an IDLE SA */ void (*cl_inet_idlesa)(netstackid_t, uint8_t, uint32_t, sa_family_t, in6_addr_t, in6_addr_t, void *) = 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. This is used to serialize * plumbing operations, IPMP operations, most set ioctls, 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, along with IPMP operations and processing of DLPI control * messages received from drivers 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 as long as an ipif is refheld * directly or indirectly. For example an SIOCSLIFADDR ioctl that changes the * address of an ipif has to go through the ipsq_t. This ensures that only * one such exclusive operation proceeds at any time on the ipif. It then * 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 ncec_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 * * association * Insertion/deletion of an ill in the system, insertion/deletion of an ipif * into an ill, changing the mapping of an ill, 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. * * - ill_lock: This is a per ill mutex. * It protects some members of the ill_t struct; see ip.h for details. * 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 some members of the ipsq_t struct; see ip.h for details. * It also protects the mapping * * - ipx_lock: This is a per ipxop_t mutex lock. * This protects some members of the ipxop_t struct; see ip.h for details. * * - phyint_lock: This is a per phyint mutex lock. Protects just the * phyint_flags * * - 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. * * - 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_flags since 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, the ipsq_lock must be held, and one must be writer on the ipsq. * This is only done when ills are added or removed from IPMP groups. * * 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 -> ipx_lock * ill_g_lock -> ill_lock(s) -> phyint_lock * ill_g_lock -> ndp_g_lock -> ill_lock -> ncec_lock * ill_g_lock -> ip_addr_avail_lock * conn_lock -> irb_lock -> ill_lock -> ire_lock * ill_g_lock -> ip_g_nd_lock * ill_g_lock -> ips_ipmp_lock -> ill_lock -> nce_lock * ill_g_lock -> ndp_g_lock -> ill_lock -> ncec_lock -> nce_lock * arl_lock -> ill_lock * ips_ire_dep_lock -> irb_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. * * Multicast scenarios * ips_ill_g_lock -> ill_mcast_lock * conn_ilg_lock -> ips_ill_g_lock -> ill_lock * ill_mcast_serializer -> ill_mcast_lock -> ips_ipmp_lock -> ill_lock * ill_mcast_serializer -> ill_mcast_lock -> connf_lock -> conn_lock * ill_mcast_serializer -> ill_mcast_lock -> conn_ilg_lock * ill_mcast_serializer -> ill_mcast_lock -> ips_igmp_timer_lock * * IPsec scenarios * * ipsa_lock -> ill_g_lock -> ill_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 * * squeue(sq_lock), flow related (ft_lock, fe_lock) locking * * cpu_lock --> ill_lock --> sqset_lock --> sq_lock * sq_lock -> conn_lock -> QLOCK(q) * ill_lock -> ft_lock -> fe_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. * * IRE dependencies - In some cases we hold ips_ire_dep_lock across ire_refrele * hence we will acquire irb_lock while holding ips_ire_dep_lock. * * IPsec notes : * * IP interacts with the IPsec code (AH/ESP) by storing IPsec attributes * in the ip_xmit_attr_t ip_recv_attr_t. For outbound datagrams, the * ip_xmit_attr_t has the * information used by the IPsec code for applying the right level of * protection. The information initialized by IP in the ip_xmit_attr_t * is determined by the per-socket policy or global policy in the system. * For inbound datagrams, the ip_recv_attr_t * 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. * * 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_policy_set once the destination is known. * 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. The way this is accomplished * differs when ILL_CAPAB_DLD_DIRECT is enabled for that IP instance. When * ILL_DIRECT_CAPABLE(ill) is TRUE, IP can do direct function calls into * GLDv3. Otherwise packets are sent down to lower layers using STREAMS * functions. * * Per Tx ring udp flow control: * This is applicable only when ILL_CAPAB_DLD_DIRECT capability is set in * the ill (i.e. ILL_DIRECT_CAPABLE(ill) is true). * * The underlying link can expose multiple Tx rings to the GLDv3 mac layer. * To achieve best performance, outgoing traffic need to be fanned out among * these Tx ring. mac_tx() is called (via str_mdata_fastpath_put()) to send * traffic out of the NIC and it takes a fanout hint. UDP connections pass * the address of connp as fanout hint to mac_tx(). Under flow controlled * condition, mac_tx() returns a non-NULL cookie (ip_mac_tx_cookie_t). This * cookie points to a specific Tx ring that is blocked. The cookie is used to * hash into an idl_tx_list[] entry in idl_tx_list[] array. Each idl_tx_list_t * point to drain_lists (idl_t's). These drain list will store the blocked UDP * connp's. The drain list is not a single list but a configurable number of * lists. * * The diagram below shows idl_tx_list_t's and their drain_lists. ip_stack_t * has an array of idl_tx_list_t. The size of the array is TX_FANOUT_SIZE * which is equal to 128. This array in turn contains a pointer to idl_t[], * the ip drain list. The idl_t[] array size is MIN(max_ncpus, 8). The drain * list will point to the list of connp's that are flow controlled. * * --------------- ------- ------- ------- * |->|drain_list[0]|-->|connp|-->|connp|-->|connp|--> * | --------------- ------- ------- ------- * | --------------- ------- ------- ------- * |->|drain_list[1]|-->|connp|-->|connp|-->|connp|--> * ---------------- | --------------- ------- ------- ------- * |idl_tx_list[0]|->| --------------- ------- ------- ------- * ---------------- |->|drain_list[2]|-->|connp|-->|connp|-->|connp|--> * | --------------- ------- ------- ------- * . . . . . * | --------------- ------- ------- ------- * |->|drain_list[n]|-->|connp|-->|connp|-->|connp|--> * --------------- ------- ------- ------- * --------------- ------- ------- ------- * |->|drain_list[0]|-->|connp|-->|connp|-->|connp|--> * | --------------- ------- ------- ------- * | --------------- ------- ------- ------- * ---------------- |->|drain_list[1]|-->|connp|-->|connp|-->|connp|--> * |idl_tx_list[1]|->| --------------- ------- ------- ------- * ---------------- | . . . . * | --------------- ------- ------- ------- * |->|drain_list[n]|-->|connp|-->|connp|-->|connp|--> * --------------- ------- ------- ------- * ..... * ---------------- * |idl_tx_list[n]|-> ... * ---------------- * * When mac_tx() returns a cookie, the cookie is hashed into an index into * ips_idl_tx_list[], and conn_drain_insert() is called with the idl_tx_list * to insert the conn onto. conn_drain_insert() asserts flow control for the * sockets via su_txq_full() (non-STREAMS) or QFULL on conn_wq (STREAMS). * Further, conn_blocked is set to indicate that the conn is blocked. * * GLDv3 calls ill_flow_enable() when flow control is relieved. The cookie * passed in the call to ill_flow_enable() identifies the blocked Tx ring and * is again hashed to locate the appropriate idl_tx_list, which is then * drained via conn_walk_drain(). conn_walk_drain() goes through each conn in * the drain list and calls conn_drain_remove() to clear flow control (via * calling su_txq_full() or clearing QFULL), and remove the conn from the * drain list. * * Note that the drain list is not a single list but a (configurable) array of * lists (8 elements by default). Synchronization between drain insertion and * flow control wakeup is handled by using idl_txl->txl_lock, and only * conn_drain_insert() and conn_drain_remove() manipulate the drain list. * * Flow control via STREAMS is used when ILL_DIRECT_CAPABLE() returns FALSE. * On the send side, if the packet cannot be sent down to the driver by IP * (canput() fails), ip_xmit() drops the packet and returns EWOULDBLOCK to the * caller, who may then invoke ixa_check_drain_insert() to insert the conn on * the 0'th drain list. When ip_wsrv() runs on the ill_wq because flow * control has been relieved, the blocked conns in the 0'th drain list are * drained as in the non-STREAMS case. * * In both the STREAMS and non-STREAMS cases, the sockfs upcall to set QFULL * is done when the conn is inserted into the drain list (conn_drain_insert()) * and cleared when the conn is removed from the it (conn_drain_remove()). * * 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 ire_send_wire_v4 and ire_send_wire_v6. * * Inbound (local_in) * Hooks are placed in ip_fanout_v4 and ip_fanout_v6. * * Forwarding (in and out) * Hooks are placed in ire_recv_forward_v4/v6. * * 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. * * 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_IF_NORESOLVER (interface routes) Exclusive * IRE_IF_RESOLVER (interface routes) Exclusive * IRE_IF_CLONE (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. * When ip_restrict_interzone_loopback is set (the default), * ire_route_recursive 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 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 ip_input_broadcast(). * * Applications in different zones can join the same multicast group address. * The same logic applies for multicast as for broadcast. ip_input_multicast * dispatches packets to all zones that have members on the physical interface. */ /* * 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; static int ip_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp, boolean_t isv6); static mblk_t *ip_xmit_attach_llhdr(mblk_t *, nce_t *); static boolean_t icmp_inbound_verify_v4(mblk_t *, icmph_t *, ip_recv_attr_t *); static void icmp_inbound_too_big_v4(icmph_t *, ip_recv_attr_t *); static void icmp_inbound_error_fanout_v4(mblk_t *, icmph_t *, ip_recv_attr_t *); static void icmp_options_update(ipha_t *); static void icmp_param_problem(mblk_t *, uint8_t, ip_recv_attr_t *); static void icmp_pkt(mblk_t *, void *, size_t, ip_recv_attr_t *); static mblk_t *icmp_pkt_err_ok(mblk_t *, ip_recv_attr_t *); static void icmp_redirect_v4(mblk_t *mp, ipha_t *, icmph_t *, ip_recv_attr_t *); static void icmp_send_redirect(mblk_t *, ipaddr_t, ip_recv_attr_t *); static void icmp_send_reply_v4(mblk_t *, ipha_t *, icmph_t *, ip_recv_attr_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_lrput(queue_t *, mblk_t *); ipaddr_t ip_net_mask(ipaddr_t); char *ip_nv_lookup(nv_t *, int); 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); int ip_snmp_get(queue_t *, mblk_t *, int, boolean_t); static mblk_t *ip_snmp_get_mib2_ip(queue_t *, mblk_t *, mib2_ipIfStatsEntry_t *, ip_stack_t *, boolean_t); static mblk_t *ip_snmp_get_mib2_ip_traffic_stats(queue_t *, mblk_t *, ip_stack_t *, boolean_t); static mblk_t *ip_snmp_get_mib2_ip6(queue_t *, mblk_t *, ip_stack_t *, boolean_t); static mblk_t *ip_snmp_get_mib2_icmp(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_icmp6(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_igmp(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_multi(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_ip_addr(queue_t *, mblk_t *, ip_stack_t *ipst, boolean_t); static mblk_t *ip_snmp_get_mib2_ip6_addr(queue_t *, mblk_t *, ip_stack_t *ipst, boolean_t); static mblk_t *ip_snmp_get_mib2_ip_group_src(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_ip6_group_src(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_ip_group_mem(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_ip6_group_mem(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_virt_multi(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_multi_rtable(queue_t *, mblk_t *, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_ip_route_media(queue_t *, mblk_t *, int, ip_stack_t *ipst); static mblk_t *ip_snmp_get_mib2_ip6_route_media(queue_t *, mblk_t *, int, ip_stack_t *ipst); 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_v4_media(ncec_t *, iproutedata_t *); static int ip_snmp_get2_v6_media(ncec_t *, iproutedata_t *); int ip_snmp_set(queue_t *, int, int, uchar_t *, int); static mblk_t *ip_fragment_copyhdr(uchar_t *, int, int, ip_stack_t *, mblk_t *); static void conn_drain_init(ip_stack_t *); static void conn_drain_fini(ip_stack_t *); static void conn_drain(conn_t *connp, boolean_t closing); static void conn_walk_drain(ip_stack_t *, idl_tx_list_t *); static void conn_walk_sctp(pfv_t, void *, zoneid_t, netstack_t *); static void *ip_stack_init(netstackid_t stackid, netstack_t *ns); static void ip_stack_shutdown(netstackid_t stackid, void *arg); static void ip_stack_fini(netstackid_t stackid, void *arg); static int ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t, const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *), ire_t *, conn_t *, boolean_t, const in6_addr_t *, mcast_record_t, const in6_addr_t *); static int ip_squeue_switch(int); static void *ip_kstat_init(netstackid_t, ip_stack_t *); static void ip_kstat_fini(netstackid_t, kstat_t *); static int ip_kstat_update(kstat_t *kp, int rw); static void *icmp_kstat_init(netstackid_t); static void icmp_kstat_fini(netstackid_t, kstat_t *); static int icmp_kstat_update(kstat_t *kp, int rw); static void *ip_kstat2_init(netstackid_t, ip_stat_t *); static void ip_kstat2_fini(netstackid_t, kstat_t *); static void ipobs_init(ip_stack_t *); static void ipobs_fini(ip_stack_t *); static int ip_tp_cpu_update(cpu_setup_t, int, void *); ipaddr_t ip_g_all_ones = IP_HOST_MASK; static long ip_rput_pullups; int dohwcksum = 1; /* use h/w cksum if supported by the hardware */ vmem_t *ip_minor_arena_sa; /* for minor nos. from INET_MIN_DEV+2 thru 2^^18-1 */ vmem_t *ip_minor_arena_la; /* for minor nos. from 2^^18 thru 2^^32-1 */ int ip_debug; /* * Multirouting/CGTP stuff */ int ip_cgtp_filter_rev = CGTP_FILTER_REV; /* CGTP hooks version */ /* * IP tunables related declarations. Definitions are in ip_tunables.c */ extern mod_prop_info_t ip_propinfo_tbl[]; extern int ip_propinfo_count; /* * 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, 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, IF_CMD, ip_sioctl_get_dstaddr, NULL }, /* 016 */ { SIOCSIFFLAGS, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart }, /* 017 */ { SIOCGIFFLAGS, sizeof (struct ifreq), IPI_MODOK | IPI_GET_CMD, 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, 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, IF_CMD, ip_sioctl_get_mtu, NULL }, /* 023 */ { SIOCGIFBRDADDR, sizeof (struct ifreq), IPI_GET_CMD, 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, 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, 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 | IPI_WR, ARP_CMD, ip_sioctl_arp, NULL }, /* 031 */ { SIOCGARP, sizeof (struct arpreq), IPI_GET_CMD, ARP_CMD, ip_sioctl_arp, NULL }, /* 032 */ { SIOCDARP, sizeof (struct arpreq), IPI_PRIV | IPI_WR, ARP_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, MISC_CMD, ip_sioctl_get_ifnum, NULL }, /* 088 */ { SIOCGIFMUXID, sizeof (struct ifreq), IPI_GET_CMD, IF_CMD, ip_sioctl_get_muxid, NULL }, /* 089 */ { SIOCSIFMUXID, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_muxid, NULL }, /* Both if and lif variants share same func */ /* 090 */ { SIOCGIFINDEX, sizeof (struct ifreq), IPI_GET_CMD, IF_CMD, ip_sioctl_get_lifindex, NULL }, /* Both if and lif variants share same func */ /* 091 */ { SIOCSIFINDEX, sizeof (struct ifreq), IPI_PRIV | IPI_WR, IF_CMD, ip_sioctl_slifindex, NULL }, /* copyin size cannot be coded for SIOCGIFCONF */ /* 092 */ { SIOCGIFCONF, 0, IPI_GET_CMD, 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, LIF_CMD, ip_sioctl_removeif, ip_sioctl_removeif_restart }, /* 111 */ { SIOCLIFADDIF, sizeof (struct lifreq), IPI_GET_CMD | IPI_PRIV | IPI_WR, 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, 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, LIF_CMD, ip_sioctl_get_dstaddr, NULL }, /* 116 */ { SIOCSLIFFLAGS, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_flags, ip_sioctl_flags_restart }, /* 117 */ { SIOCGLIFFLAGS, sizeof (struct lifreq), IPI_GET_CMD | IPI_MODOK, 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, 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, LIF_CMD, ip_sioctl_get_mtu, NULL }, /* 123 */ { SIOCGLIFBRDADDR, sizeof (struct lifreq), IPI_GET_CMD, 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, 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, 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, LIF_CMD, ip_sioctl_slifname, ip_sioctl_slifname_restart }, /* 130 */ { SIOCGLIFNUM, sizeof (struct lifnum), IPI_GET_CMD, MISC_CMD, ip_sioctl_get_lifnum, NULL }, /* 131 */ { SIOCGLIFMUXID, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_sioctl_get_muxid, NULL }, /* 132 */ { SIOCSLIFMUXID, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_muxid, NULL }, /* 133 */ { SIOCGLIFINDEX, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifindex, 0 }, /* 134 */ { SIOCSLIFINDEX, sizeof (struct lifreq), IPI_PRIV | IPI_WR, 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, 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, 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, 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 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 148 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* Old *IPSECONFIG ioctls are now deprecated, now see spdsock.c */ /* 149 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 150 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 151 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 152 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 153 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* 154 */ { SIOCGLIFBINDING, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_sioctl_get_binding, NULL }, /* 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, LIF_CMD, ip_sioctl_get_groupname, NULL }, /* 157 */ { SIOCGLIFGROUPINFO, sizeof (lifgroupinfo_t), IPI_GET_CMD, MISC_CMD, ip_sioctl_groupinfo, 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 */ { IPI_DONTCARE, 0, 0, 0, NULL, 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, ip_sioctl_get_lifconf, NULL }, /* 166 */ { SIOCSXARP, sizeof (struct xarpreq), IPI_PRIV | IPI_WR, XARP_CMD, ip_sioctl_arp, NULL }, /* 167 */ { SIOCGXARP, sizeof (struct xarpreq), IPI_GET_CMD, XARP_CMD, ip_sioctl_arp, NULL }, /* 168 */ { SIOCDXARP, sizeof (struct xarpreq), IPI_PRIV | IPI_WR, XARP_CMD, ip_sioctl_arp, NULL }, /* SIOCPOPSOCKFS is not handled by IP */ /* 169 */ { IPI_DONTCARE /* SIOCPOPSOCKFS */, 0, 0, 0, NULL, NULL }, /* 170 */ { SIOCGLIFZONE, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifzone, NULL }, /* 171 */ { SIOCSLIFZONE, sizeof (struct lifreq), IPI_PRIV | IPI_WR, 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, MSFILT_CMD, ip_sioctl_msfilter, NULL }, /* 179 */ { SIOCSMSFILTER, sizeof (struct group_filter), 0, MSFILT_CMD, ip_sioctl_msfilter, NULL }, /* 180 */ { SIOCGIPMSFILTER, sizeof (struct ip_msfilter), IPI_GET_CMD, MSFILT_CMD, ip_sioctl_msfilter, NULL }, /* 181 */ { SIOCSIPMSFILTER, sizeof (struct ip_msfilter), 0, MSFILT_CMD, ip_sioctl_msfilter, NULL }, /* 182 */ { IPI_DONTCARE, 0, 0, 0, NULL, NULL }, /* SIOCSENABLESDP is handled by SDP */ /* 183 */ { IPI_DONTCARE /* SIOCSENABLESDP */, 0, 0, 0, NULL, NULL }, /* 184 */ { IPI_DONTCARE /* SIOCSQPTR */, 0, 0, 0, NULL, NULL }, /* 185 */ { SIOCGIFHWADDR, sizeof (struct ifreq), IPI_GET_CMD, IF_CMD, ip_sioctl_get_ifhwaddr, NULL }, /* 186 */ { IPI_DONTCARE /* SIOCGSTAMP */, 0, 0, 0, NULL, NULL }, /* 187 */ { SIOCILB, 0, IPI_PRIV | IPI_GET_CMD, MISC_CMD, ip_sioctl_ilb_cmd, NULL }, /* 188 */ { SIOCGETPROP, 0, IPI_GET_CMD, 0, NULL, NULL }, /* 189 */ { SIOCSETPROP, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL}, /* 190 */ { SIOCGLIFDADSTATE, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_sioctl_get_dadstate, NULL }, /* 191 */ { SIOCSLIFPREFIX, sizeof (struct lifreq), IPI_PRIV | IPI_WR, LIF_CMD, ip_sioctl_prefix, ip_sioctl_prefix_restart }, /* 192 */ { SIOCGLIFHWADDR, sizeof (struct lifreq), IPI_GET_CMD, LIF_CMD, ip_sioctl_get_lifhwaddr, NULL } }; int ip_ndx_ioctl_count = sizeof (ip_ndx_ioctl_table) / sizeof (ip_ioctl_cmd_t); ip_ioctl_cmd_t ip_misc_ioctl_table[] = { { I_LINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL }, { I_UNLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL }, { I_PLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL }, { I_PUNLINK, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL }, { ND_GET, 0, 0, 0, NULL, NULL }, { ND_SET, 0, IPI_PRIV | IPI_WR, 0, NULL, NULL }, { IP_IOCTL, 0, 0, 0, NULL, NULL }, { SIOCGETVIFCNT, sizeof (struct sioc_vif_req), IPI_GET_CMD, MISC_CMD, mrt_ioctl}, { SIOCGETSGCNT, sizeof (struct sioc_sg_req), IPI_GET_CMD, MISC_CMD, mrt_ioctl}, { SIOCGETLSGCNT, sizeof (struct sioc_lsg_req), IPI_GET_CMD, MISC_CMD, mrt_ioctl} }; int ip_misc_ioctl_count = sizeof (ip_misc_ioctl_table) / sizeof (ip_ioctl_cmd_t); int conn_drain_nthreads; /* Number of drainers reqd. */ /* Settable in /etc/system */ /* 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_DEFAULT, "DEFAULT" }, { IRE_PREFIX, "PREFIX" }, { IRE_IF_NORESOLVER, "IF_NORESOL" }, { IRE_IF_RESOLVER, "IF_RESOLV" }, { IRE_IF_CLONE, "IF_CLONE" }, { IRE_HOST, "HOST" }, { IRE_MULTICAST, "MULTICAST" }, { IRE_NOROUTE, "NOROUTE" }, { 0 } }; nv_t *ire_nv_tbl = ire_nv_arr; /* 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, IP_MOD_MINPSZ, IP_MOD_MAXPSZ, IP_MOD_HIWAT, IP_MOD_LOWAT }; /* * Duplicate static symbols within a module confuses mdb; so we avoid the * problem by making the symbols here distinct from those in udp.c. */ /* * Entry points for IP as a device and as a module. * We have separate open functions for the /dev/ip and /dev/ip6 devices. */ static struct qinit iprinitv4 = { (pfi_t)ip_rput, NULL, ip_openv4, ip_close, NULL, &ip_mod_info }; struct qinit iprinitv6 = { (pfi_t)ip_rput_v6, NULL, ip_openv6, ip_close, NULL, &ip_mod_info }; static struct qinit ipwinit = { (pfi_t)ip_wput_nondata, (pfi_t)ip_wsrv, NULL, NULL, NULL, &ip_mod_info }; static struct qinit iplrinit = { (pfi_t)ip_lrput, NULL, ip_openv4, ip_close, NULL, &ip_mod_info }; static struct qinit iplwinit = { (pfi_t)ip_lwput, NULL, NULL, NULL, NULL, &ip_mod_info }; /* For AF_INET aka /dev/ip */ struct streamtab ipinfov4 = { &iprinitv4, &ipwinit, &iplrinit, &iplwinit }; /* For AF_INET6 aka /dev/ip6 */ struct streamtab ipinfov6 = { &iprinitv6, &ipwinit, &iplrinit, &iplwinit }; #ifdef DEBUG boolean_t skip_sctp_cksum = B_FALSE; #endif /* * Generate an ICMP fragmentation needed message. * When called from ip_output side a minimal ip_recv_attr_t needs to be * constructed by the caller. */ void icmp_frag_needed(mblk_t *mp, int mtu, ip_recv_attr_t *ira) { icmph_t icmph; ip_stack_t *ipst = ira->ira_ill->ill_ipst; mp = icmp_pkt_err_ok(mp, ira); if (mp == NULL) 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(&ipst->ips_icmp_mib, icmpOutFragNeeded); BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDestUnreachs); icmp_pkt(mp, &icmph, sizeof (icmph_t), ira); } /* * icmp_inbound_v4 deals with ICMP messages that are handled by IP. * If the ICMP message is consumed by IP, i.e., it should not be delivered * to any IPPROTO_ICMP raw sockets, then it returns NULL. * Likewise, if the ICMP error is misformed (too short, etc), then it * returns NULL. The caller uses this to determine whether or not to send * to raw sockets. * * All error messages are passed to the matching transport stream. * * The following cases are handled by icmp_inbound: * 1) It needs to send a reply back and possibly delivering it * to the "interested" upper clients. * 2) Return the mblk so that the caller can pass it to the RAW socket clients. * 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 * by delivering an error to the upper layers. * * We handle the above three 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 dce_pmtu, 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 dce_pmtu 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. */ mblk_t * icmp_inbound_v4(mblk_t *mp, ip_recv_attr_t *ira) { icmph_t *icmph; ipha_t *ipha; /* Outer header */ int ip_hdr_length; /* Outer header length */ boolean_t interested; ipif_t *ipif; uint32_t ts; uint32_t *tsp; timestruc_t now; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; zoneid_t zoneid = ira->ira_zoneid; int len_needed; mblk_t *mp_ret = NULL; ipha = (ipha_t *)mp->b_rptr; BUMP_MIB(&ipst->ips_icmp_mib, icmpInMsgs); ip_hdr_length = ira->ira_ip_hdr_length; if ((mp->b_wptr - mp->b_rptr) < (ip_hdr_length + ICMPH_SIZE)) { if (ira->ira_pktlen < (ip_hdr_length + ICMPH_SIZE)) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts); ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill); freemsg(mp); return (NULL); } /* Last chance to get real. */ ipha = ip_pullup(mp, ip_hdr_length + ICMPH_SIZE, ira); if (ipha == NULL) { BUMP_MIB(&ipst->ips_icmp_mib, icmpInErrors); freemsg(mp); return (NULL); } } /* The IP header will always be a multiple of four bytes */ icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length]; ip2dbg(("icmp_inbound_v4: type %d code %d\n", icmph->icmph_type, icmph->icmph_code)); /* * We will set "interested" to "true" if we should pass a copy to * the transport or if we handle the packet locally. */ interested = B_FALSE; switch (icmph->icmph_type) { case ICMP_ECHO_REPLY: BUMP_MIB(&ipst->ips_icmp_mib, icmpInEchoReps); break; case ICMP_DEST_UNREACHABLE: if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED) BUMP_MIB(&ipst->ips_icmp_mib, icmpInFragNeeded); interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&ipst->ips_icmp_mib, icmpInDestUnreachs); break; case ICMP_SOURCE_QUENCH: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&ipst->ips_icmp_mib, icmpInSrcQuenchs); break; case ICMP_REDIRECT: if (!ipst->ips_ip_ignore_redirect) interested = B_TRUE; BUMP_MIB(&ipst->ips_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 (ira->ira_flags & IRAF_MULTICAST) { /* multicast: respond based on tunable */ interested = ipst->ips_ip_g_resp_to_echo_mcast; } else if (ira->ira_flags & IRAF_BROADCAST) { /* broadcast: respond based on tunable */ interested = ipst->ips_ip_g_resp_to_echo_bcast; } else { /* unicast: always respond */ interested = B_TRUE; } BUMP_MIB(&ipst->ips_icmp_mib, icmpInEchos); if (!interested) { /* We never pass these to RAW sockets */ freemsg(mp); return (NULL); } /* Check db_ref to make sure we can modify the packet. */ if (mp->b_datap->db_ref > 1) { mblk_t *mp1; mp1 = copymsg(mp); freemsg(mp); if (!mp1) { BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops); return (NULL); } mp = mp1; ipha = (ipha_t *)mp->b_rptr; icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length]; } icmph->icmph_type = ICMP_ECHO_REPLY; BUMP_MIB(&ipst->ips_icmp_mib, icmpOutEchoReps); icmp_send_reply_v4(mp, ipha, icmph, ira); return (NULL); case ICMP_ROUTER_ADVERTISEMENT: case ICMP_ROUTER_SOLICITATION: break; case ICMP_TIME_EXCEEDED: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimeExcds); break; case ICMP_PARAM_PROBLEM: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&ipst->ips_icmp_mib, icmpInParmProbs); break; case ICMP_TIME_STAMP_REQUEST: /* Response to Time Stamp Requests is local policy. */ if (ipst->ips_ip_g_resp_to_timestamp) { if (ira->ira_flags & IRAF_MULTIBROADCAST) interested = ipst->ips_ip_g_resp_to_timestamp_bcast; else interested = B_TRUE; } if (!interested) { /* We never pass these to RAW sockets */ freemsg(mp); return (NULL); } /* Make sure we have enough of the packet */ len_needed = ip_hdr_length + ICMPH_SIZE + 3 * sizeof (uint32_t); if (mp->b_wptr - mp->b_rptr < len_needed) { ipha = ip_pullup(mp, len_needed, ira); if (ipha == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards - ip_pullup", mp, ill); freemsg(mp); return (NULL); } /* Refresh following the pullup. */ icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length]; } BUMP_MIB(&ipst->ips_icmp_mib, icmpInTimestamps); /* Check db_ref to make sure we can modify the packet. */ if (mp->b_datap->db_ref > 1) { mblk_t *mp1; mp1 = copymsg(mp); freemsg(mp); if (!mp1) { BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops); return (NULL); } mp = mp1; ipha = (ipha_t *)mp->b_rptr; icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length]; } icmph->icmph_type = ICMP_TIME_STAMP_REPLY; tsp = (uint32_t *)&icmph[1]; tsp++; /* Skip past 'originate time' */ /* Compute # of milliseconds since midnight */ gethrestime(&now); ts = (now.tv_sec % (24 * 60 * 60)) * 1000 + NSEC2MSEC(now.tv_nsec); *tsp++ = htonl(ts); /* Lay in 'receive time' */ *tsp++ = htonl(ts); /* Lay in 'send time' */ BUMP_MIB(&ipst->ips_icmp_mib, icmpOutTimestampReps); icmp_send_reply_v4(mp, ipha, icmph, ira); return (NULL); case ICMP_TIME_STAMP_REPLY: BUMP_MIB(&ipst->ips_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 (ira->ira_flags & IRAF_MULTIBROADCAST) { interested = ipst->ips_ip_respond_to_address_mask_broadcast; } else { interested = B_TRUE; } if (!interested) { /* We never pass these to RAW sockets */ freemsg(mp); return (NULL); } len_needed = ip_hdr_length + ICMPH_SIZE + IP_ADDR_LEN; if (mp->b_wptr - mp->b_rptr < len_needed) { ipha = ip_pullup(mp, len_needed, ira); if (ipha == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts); ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill); freemsg(mp); return (NULL); } /* Refresh following the pullup. */ icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length]; } BUMP_MIB(&ipst->ips_icmp_mib, icmpInAddrMasks); /* Check db_ref to make sure we can modify the packet. */ if (mp->b_datap->db_ref > 1) { mblk_t *mp1; mp1 = copymsg(mp); freemsg(mp); if (!mp1) { BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops); return (NULL); } mp = mp1; ipha = (ipha_t *)mp->b_rptr; icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length]; } /* * Need the ipif with the mask be the same as the source * address of the mask reply. For unicast we have a specific * ipif. For multicast/broadcast we only handle onlink * senders, and use the source address to pick an ipif. */ ipif = ipif_lookup_addr(ipha->ipha_dst, ill, zoneid, ipst); if (ipif == NULL) { /* Broadcast or multicast */ ipif = ipif_lookup_remote(ill, ipha->ipha_src, zoneid); if (ipif == NULL) { freemsg(mp); return (NULL); } } icmph->icmph_type = ICMP_ADDRESS_MASK_REPLY; bcopy(&ipif->ipif_net_mask, &icmph[1], IP_ADDR_LEN); ipif_refrele(ipif); BUMP_MIB(&ipst->ips_icmp_mib, icmpOutAddrMaskReps); icmp_send_reply_v4(mp, ipha, icmph, ira); return (NULL); case ICMP_ADDRESS_MASK_REPLY: BUMP_MIB(&ipst->ips_icmp_mib, icmpInAddrMaskReps); break; default: interested = B_TRUE; /* Pass up to transport */ BUMP_MIB(&ipst->ips_icmp_mib, icmpInUnknowns); break; } /* * See if there is an ICMP client to avoid an extra copymsg/freemsg * if there isn't one. */ if (ipst->ips_ipcl_proto_fanout_v4[IPPROTO_ICMP].connf_head != NULL) { /* If there is an ICMP client and we want one too, copy it. */ if (!interested) { /* Caller will deliver to RAW sockets */ return (mp); } mp_ret = copymsg(mp); if (mp_ret == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards - copymsg", mp, ill); } } else if (!interested) { /* Neither we nor raw sockets are interested. Drop packet now */ freemsg(mp); return (NULL); } /* * ICMP error or redirect packet. Make sure we have enough of * the header and that db_ref == 1 since we might end up modifying * the packet. */ if (mp->b_cont != NULL) { if (ip_pullup(mp, -1, ira) == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards - ip_pullup", mp, ill); freemsg(mp); return (mp_ret); } } if (mp->b_datap->db_ref > 1) { mblk_t *mp1; mp1 = copymsg(mp); if (mp1 == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards - copymsg", mp, ill); freemsg(mp); return (mp_ret); } freemsg(mp); mp = mp1; } /* * In case mp has changed, verify the message before any further * processes. */ ipha = (ipha_t *)mp->b_rptr; icmph = (icmph_t *)&mp->b_rptr[ip_hdr_length]; if (!icmp_inbound_verify_v4(mp, icmph, ira)) { freemsg(mp); return (mp_ret); } switch (icmph->icmph_type) { case ICMP_REDIRECT: icmp_redirect_v4(mp, ipha, icmph, ira); break; case ICMP_DEST_UNREACHABLE: if (icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED) { /* Update DCE and adjust MTU is icmp header if needed */ icmp_inbound_too_big_v4(icmph, ira); } /* FALLTHRU */ default: icmp_inbound_error_fanout_v4(mp, icmph, ira); break; } return (mp_ret); } /* * Send an ICMP echo, timestamp or address mask reply. * The caller has already updated the payload part of the packet. * We handle the ICMP checksum, IP source address selection and feed * the packet into ip_output_simple. */ static void icmp_send_reply_v4(mblk_t *mp, ipha_t *ipha, icmph_t *icmph, ip_recv_attr_t *ira) { uint_t ip_hdr_length = ira->ira_ip_hdr_length; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; ip_xmit_attr_t ixas; /* Send out an ICMP packet */ icmph->icmph_checksum = 0; icmph->icmph_checksum = IP_CSUM(mp, ip_hdr_length, 0); /* Reset time to live. */ ipha->ipha_ttl = ipst->ips_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); bzero(&ixas, sizeof (ixas)); ixas.ixa_flags = IXAF_BASIC_SIMPLE_V4; ixas.ixa_zoneid = ira->ira_zoneid; ixas.ixa_cred = kcred; ixas.ixa_cpid = NOPID; ixas.ixa_tsl = ira->ira_tsl; /* Behave as a multi-level responder */ ixas.ixa_ifindex = 0; ixas.ixa_ipst = ipst; ixas.ixa_multicast_ttl = IP_DEFAULT_MULTICAST_TTL; if (!(ira->ira_flags & IRAF_IPSEC_SECURE)) { /* * This packet should go out the same way as it * came in i.e in clear, independent of the IPsec policy * for transmitting packets. */ ixas.ixa_flags |= IXAF_NO_IPSEC; } else { if (!ipsec_in_to_out(ira, &ixas, mp, ipha, NULL)) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); /* Note: mp already consumed and ip_drop_packet done */ return; } } if (ira->ira_flags & IRAF_MULTIBROADCAST) { /* * Not one or our addresses (IRE_LOCALs), thus we let * ip_output_simple pick the source. */ ipha->ipha_src = INADDR_ANY; ixas.ixa_flags |= IXAF_SET_SOURCE; } /* Should we send with DF and use dce_pmtu? */ if (ipst->ips_ipv4_icmp_return_pmtu) { ixas.ixa_flags |= IXAF_PMTU_DISCOVERY; ipha->ipha_fragment_offset_and_flags |= IPH_DF_HTONS; } BUMP_MIB(&ipst->ips_icmp_mib, icmpOutMsgs); (void) ip_output_simple(mp, &ixas); ixa_cleanup(&ixas); } /* * Verify the ICMP messages for either for ICMP error or redirect packet. * The caller should have fully pulled up the message. If it's a redirect * packet, only basic checks on IP header will be done; otherwise, verify * the packet by looking at the included ULP header. * * Called before icmp_inbound_error_fanout_v4 is called. */ static boolean_t icmp_inbound_verify_v4(mblk_t *mp, icmph_t *icmph, ip_recv_attr_t *ira) { ill_t *ill = ira->ira_ill; int hdr_length; ip_stack_t *ipst = ira->ira_ill->ill_ipst; conn_t *connp; ipha_t *ipha; /* Inner IP header */ ipha = (ipha_t *)&icmph[1]; if ((uchar_t *)ipha + IP_SIMPLE_HDR_LENGTH > mp->b_wptr) goto truncated; hdr_length = IPH_HDR_LENGTH(ipha); if ((IPH_HDR_VERSION(ipha) != IPV4_VERSION)) goto discard_pkt; if (hdr_length < sizeof (ipha_t)) goto truncated; if ((uchar_t *)ipha + hdr_length > mp->b_wptr) goto truncated; /* * Stop here for ICMP_REDIRECT. */ if (icmph->icmph_type == ICMP_REDIRECT) return (B_TRUE); /* * ICMP errors only. */ 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) goto truncated; break; case IPPROTO_TCP: { tcpha_t *tcpha; /* * 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) goto truncated; tcpha = (tcpha_t *)((uchar_t *)ipha + hdr_length); connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcpha, TCPS_LISTEN, ipst); if (connp == NULL) goto discard_pkt; if ((connp->conn_verifyicmp != NULL) && !connp->conn_verifyicmp(connp, tcpha, icmph, NULL, ira)) { CONN_DEC_REF(connp); goto discard_pkt; } CONN_DEC_REF(connp); break; } 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) goto truncated; break; case IPPROTO_ESP: case IPPROTO_AH: break; case IPPROTO_ENCAP: if ((uchar_t *)ipha + hdr_length + sizeof (ipha_t) > mp->b_wptr) goto truncated; break; default: break; } return (B_TRUE); discard_pkt: /* Bogus ICMP error. */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); return (B_FALSE); truncated: /* We pulled up everthing already. Must be truncated */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts); ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill); return (B_FALSE); } /* 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. * Just handles the DCE create/update, including using the above table of * PMTU guesses. The caller is responsible for validating the packet before * passing it in and also to fanout the ICMP error to any matching transport * conns. Assumes the message has been fully pulled up and verified. * * Before getting here, the caller has called icmp_inbound_verify_v4() * that should have verified with ULP to prevent undoing the changes we're * going to make to DCE. For example, TCP might have verified that the packet * which generated error is in the send window. * * In some cases modified this MTU in the ICMP header packet; the caller * should pass to the matching ULP after this returns. */ static void icmp_inbound_too_big_v4(icmph_t *icmph, ip_recv_attr_t *ira) { dce_t *dce; int old_mtu; int mtu, orig_mtu; ipaddr_t dst; boolean_t disable_pmtud; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; uint_t hdr_length; ipha_t *ipha; /* Caller already pulled up everything. */ ipha = (ipha_t *)&icmph[1]; ASSERT(icmph->icmph_type == ICMP_DEST_UNREACHABLE && icmph->icmph_code == ICMP_FRAGMENTATION_NEEDED); ASSERT(ill != NULL); hdr_length = IPH_HDR_LENGTH(ipha); /* * We handle path MTU for source routed packets since the DCE * is looked up using the final destination. */ dst = ip_get_dst(ipha); dce = dce_lookup_and_add_v4(dst, ipst); if (dce == NULL) { /* Couldn't add a unique one - ENOMEM */ ip1dbg(("icmp_inbound_too_big_v4: no dce for 0x%x\n", ntohl(dst))); return; } /* Check for MTU discovery advice as described in RFC 1191 */ mtu = ntohs(icmph->icmph_du_mtu); orig_mtu = mtu; disable_pmtud = B_FALSE; mutex_enter(&dce->dce_lock); if (dce->dce_flags & DCEF_PMTU) old_mtu = dce->dce_pmtu; else old_mtu = ill->ill_mtu; if (icmph->icmph_du_zero != 0 || mtu < ipst->ips_ip_pmtu_min) { 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); DTRACE_PROBE2(ip4__pmtu__guess, dce_t *, dce, uint32_t, length); if (old_mtu <= length && old_mtu >= length - hdr_length) { /* * Handle broken BSD 4.2 systems that * return the wrong ipha_length in ICMP * errors. */ ip1dbg(("Wrong mtu: sent %d, dce %d\n", length, old_mtu)); 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 IP_MIN_MTU! */ ip1dbg(("Too big for packet size %d\n", length)); disable_pmtud = B_TRUE; mtu = ipst->ips_ip_pmtu_min; } else { mtu = icmp_frag_size_table[i]; ip1dbg(("Calculated mtu %d, packet size %d, " "before %d\n", mtu, length, old_mtu)); if (mtu < ipst->ips_ip_pmtu_min) { mtu = ipst->ips_ip_pmtu_min; disable_pmtud = B_TRUE; } } } if (disable_pmtud) dce->dce_flags |= DCEF_TOO_SMALL_PMTU; else dce->dce_flags &= ~DCEF_TOO_SMALL_PMTU; dce->dce_pmtu = MIN(old_mtu, mtu); /* Prepare to send the new max frag size for the ULP. */ icmph->icmph_du_zero = 0; icmph->icmph_du_mtu = htons((uint16_t)dce->dce_pmtu); DTRACE_PROBE4(ip4__pmtu__change, icmph_t *, icmph, dce_t *, dce, int, orig_mtu, int, mtu); /* We now have a PMTU for sure */ dce->dce_flags |= DCEF_PMTU; dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64()); mutex_exit(&dce->dce_lock); /* * After dropping the lock the new value is visible to everyone. * Then we bump the generation number so any cached values reinspect * the dce_t. */ dce_increment_generation(dce); dce_refrele(dce); } /* * If the packet in error is Self-Encapsulated, icmp_inbound_error_fanout_v4 * calls this function. */ static mblk_t * icmp_inbound_self_encap_error_v4(mblk_t *mp, ipha_t *ipha, ipha_t *in_ipha) { int length; ASSERT(mp->b_datap->db_type == M_DATA); /* icmp_inbound_v4 has already pulled up the whole error packet */ ASSERT(mp->b_cont == NULL); /* * The length that we want to overlay is the inner header * and what follows it. */ length = msgdsize(mp) - ((uchar_t *)in_ipha - mp->b_rptr); /* * Overlay the inner header and whatever follows it over the * outer header. */ bcopy((uchar_t *)in_ipha, (uchar_t *)ipha, length); /* Adjust for what we removed */ mp->b_wptr -= (uchar_t *)in_ipha - (uchar_t *)ipha; 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. * * For IPsec cases, we let the next-layer-up (which has access to * cached policy on the conn_t, or can query the SPD directly) * subtract out any IPsec overhead if they must. We therefore make no * adjustments here for IPsec overhead. * * IFN could have been generated locally or by some router. * * LOCAL : ire_send_wire (before calling ipsec_out_process) can call * icmp_frag_needed/icmp_pkt2big_v6 to generated a local IFN. * 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, ire_send_wire * generates the IFN, where IPsec processing has *not* been * done. * * Note that we retain ixa_fragsize across IPsec thus once * we have picking ixa_fragsize and entered ipsec_out_process we do * no change the fragsize even if the path MTU changes before * we reach ip_output_post_ipsec. * * In the local case, IRAF_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 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. * * The caller must have called icmp_inbound_verify_v4. */ static void icmp_inbound_error_fanout_v4(mblk_t *mp, icmph_t *icmph, ip_recv_attr_t *ira) { uint16_t *up; /* Pointer to ports in ULP header */ uint32_t ports; /* reversed ports for fanout */ ipha_t ripha; /* With reversed addresses */ ipha_t *ipha; /* Inner IP header */ uint_t hdr_length; /* Inner IP header length */ tcpha_t *tcpha; conn_t *connp; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec; ill_t *rill = ira->ira_rill; /* Caller already pulled up everything. */ ipha = (ipha_t *)&icmph[1]; ASSERT((uchar_t *)&ipha[1] <= mp->b_wptr); ASSERT(mp->b_cont == NULL); hdr_length = IPH_HDR_LENGTH(ipha); ira->ira_protocol = ipha->ipha_protocol; /* * We need a separate IP header with the source and destination * addresses reversed to do fanout/classification because the ipha in * the ICMP error is in the form we sent it out. */ 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; ip2dbg(("icmp_inbound_error_v4: 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)); switch (ipha->ipha_protocol) { case IPPROTO_UDP: up = (uint16_t *)((uchar_t *)ipha + hdr_length); /* Attempt to find a client stream based on port. */ ip2dbg(("icmp_inbound_error_v4: UDP ports %d to %d\n", ntohs(up[0]), ntohs(up[1]))); /* Note that we send error to all matches. */ ira->ira_flags |= IRAF_ICMP_ERROR; ip_fanout_udp_multi_v4(mp, &ripha, up[0], up[1], ira); ira->ira_flags &= ~IRAF_ICMP_ERROR; return; case IPPROTO_TCP: /* * 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. */ tcpha = (tcpha_t *)((uchar_t *)ipha + hdr_length); connp = ipcl_tcp_lookup_reversed_ipv4(ipha, tcpha, TCPS_LISTEN, ipst); if (connp == NULL) goto discard_pkt; if (CONN_INBOUND_POLICY_PRESENT(connp, ipss) || (ira->ira_flags & IRAF_IPSEC_SECURE)) { mp = ipsec_check_inbound_policy(mp, connp, ipha, NULL, ira); if (mp == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); /* Note that mp is NULL */ ip_drop_input("ipIfStatsInDiscards", mp, ill); CONN_DEC_REF(connp); return; } } ira->ira_flags |= IRAF_ICMP_ERROR; ira->ira_ill = ira->ira_rill = NULL; if (IPCL_IS_TCP(connp)) { SQUEUE_ENTER_ONE(connp->conn_sqp, mp, connp->conn_recvicmp, connp, ira, SQ_FILL, SQTAG_TCP_INPUT_ICMP_ERR); } else { /* Not TCP; must be SOCK_RAW, IPPROTO_TCP */ (connp->conn_recv)(connp, mp, NULL, ira); CONN_DEC_REF(connp); } ira->ira_ill = ill; ira->ira_rill = rill; ira->ira_flags &= ~IRAF_ICMP_ERROR; return; case IPPROTO_SCTP: up = (uint16_t *)((uchar_t *)ipha + hdr_length); /* Find a SCTP client stream for this packet. */ ((uint16_t *)&ports)[0] = up[1]; ((uint16_t *)&ports)[1] = up[0]; ira->ira_flags |= IRAF_ICMP_ERROR; ip_fanout_sctp(mp, &ripha, NULL, ports, ira); ira->ira_flags &= ~IRAF_ICMP_ERROR; return; case IPPROTO_ESP: case IPPROTO_AH: if (!ipsec_loaded(ipss)) { ip_proto_not_sup(mp, ira); return; } if (ipha->ipha_protocol == IPPROTO_ESP) mp = ipsecesp_icmp_error(mp, ira); else mp = ipsecah_icmp_error(mp, ira); if (mp == NULL) return; /* Just in case ipsec didn't preserve the NULL b_cont */ if (mp->b_cont != NULL) { if (!pullupmsg(mp, -1)) goto discard_pkt; } /* * Note that ira_pktlen and ira_ip_hdr_length are no longer * correct, but we don't use them any more here. * * If succesful, the mp has been modified to not include * the ESP/AH header so we can fanout to the ULP's icmp * error handler. */ if (mp->b_wptr - mp->b_rptr < IP_SIMPLE_HDR_LENGTH) goto truncated; /* Verify the modified message before any further processes. */ ipha = (ipha_t *)mp->b_rptr; hdr_length = IPH_HDR_LENGTH(ipha); icmph = (icmph_t *)&mp->b_rptr[hdr_length]; if (!icmp_inbound_verify_v4(mp, icmph, ira)) { freemsg(mp); return; } icmp_inbound_error_fanout_v4(mp, icmph, ira); return; case IPPROTO_ENCAP: { /* Look for self-encapsulated packets that caused an error */ ipha_t *in_ipha; /* * 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)) { goto discard_pkt; } if (IPH_HDR_LENGTH(in_ipha) < sizeof (ipha_t)) { goto discard_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_v4(mp, ipha, in_ipha); if (mp == NULL) goto discard_pkt; /* * Just in case self_encap didn't preserve the NULL * b_cont */ if (mp->b_cont != NULL) { if (!pullupmsg(mp, -1)) goto discard_pkt; } /* * Note that ira_pktlen and ira_ip_hdr_length are no * longer correct, but we don't use them any more here. */ if (mp->b_wptr - mp->b_rptr < IP_SIMPLE_HDR_LENGTH) goto truncated; /* * Verify the modified message before any further * processes. */ ipha = (ipha_t *)mp->b_rptr; hdr_length = IPH_HDR_LENGTH(ipha); icmph = (icmph_t *)&mp->b_rptr[hdr_length]; if (!icmp_inbound_verify_v4(mp, icmph, ira)) { freemsg(mp); return; } /* * 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) { goto discard_pkt; } icmp_inbound_error_fanout_v4(mp, icmph, ira); return; } /* No self-encapsulated */ /* FALLTHRU */ } case IPPROTO_IPV6: if ((connp = ipcl_iptun_classify_v4(&ripha.ipha_src, &ripha.ipha_dst, ipst)) != NULL) { ira->ira_flags |= IRAF_ICMP_ERROR; connp->conn_recvicmp(connp, mp, NULL, ira); CONN_DEC_REF(connp); ira->ira_flags &= ~IRAF_ICMP_ERROR; return; } /* * No IP tunnel is interested, fallthrough and see * if a raw socket will want it. */ /* FALLTHRU */ default: ira->ira_flags |= IRAF_ICMP_ERROR; ip_fanout_proto_v4(mp, &ripha, ira); ira->ira_flags &= ~IRAF_ICMP_ERROR; return; } /* NOTREACHED */ discard_pkt: BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip1dbg(("icmp_inbound_error_fanout_v4: drop pkt\n")); ip_drop_input("ipIfStatsInDiscards", mp, ill); freemsg(mp); return; truncated: /* We pulled up everthing already. Must be truncated */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts); ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill); freemsg(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)); } /* Like above but without an ipha_t */ uint8_t ipoptp_first2(ipoptp_t *optp, uint32_t totallen, uint8_t *opt) { optp->ipoptp_next = opt; 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. * * This is compatible with BSD in that it returns * the reverse source route with the final destination * as the last entry. The first 4 bytes of the option * will contain the final destination. */ int ip_opt_get_user(conn_t *connp, uchar_t *buf) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; uint32_t len = 0; uchar_t *buf1 = buf; uint32_t totallen; ipaddr_t dst; ip_pkt_t *ipp = &connp->conn_xmit_ipp; if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS)) return (0); totallen = ipp->ipp_ipv4_options_len; if (totallen & 0x3) return (0); buf += IP_ADDR_LEN; /* Leave room for final destination */ len += IP_ADDR_LEN; bzero(buf1, IP_ADDR_LEN); dst = connp->conn_faddr_v4; for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { int off; opt = opts.ipoptp_cur; if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { break; } optlen = opts.ipoptp_len; switch (optval) { case IPOPT_SSRR: case IPOPT_LSRR: /* * Insert destination 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 if not already set */ if (dst == INADDR_ANY) 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(&dst, buf + off + IP_ADDR_LEN, IP_ADDR_LEN); buf += optlen; len += optlen; break; 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. * Assumes the caller has verified that the headers are in the pulled up mblk. * Consumes mp. */ static void icmp_redirect_v4(mblk_t *mp, ipha_t *ipha, icmph_t *icmph, ip_recv_attr_t *ira) { ire_t *ire, *nire; ire_t *prev_ire; ipaddr_t src, dst, gateway; ip_stack_t *ipst = ira->ira_ill->ill_ipst; ipha_t *inner_ipha; /* Inner IP header */ /* Caller already pulled up everything. */ inner_ipha = (ipha_t *)&icmph[1]; src = ipha->ipha_src; dst = inner_ipha->ipha_dst; gateway = icmph->icmph_rd_gateway; /* Make sure the new gateway is reachable somehow. */ ire = ire_ftable_lookup_v4(gateway, 0, 0, IRE_ONLINK, NULL, ALL_ZONES, NULL, MATCH_IRE_TYPE, 0, ipst, NULL); /* * 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.) * We do longest match and then compare ire_gateway_addr below. */ prev_ire = ire_ftable_lookup_v4(dst, 0, 0, 0, NULL, ALL_ZONES, NULL, MATCH_IRE_DSTONLY, 0, ipst, NULL); /* * Check that * the redirect was not from ourselves * the new gateway and the old gateway are directly reachable */ if (prev_ire == NULL || ire == NULL || (prev_ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) || (prev_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) || !(ire->ire_type & IRE_IF_ALL) || prev_ire->ire_gateway_addr != src) { BUMP_MIB(&ipst->ips_icmp_mib, icmpInBadRedirects); ip_drop_input("icmpInBadRedirects - ire", mp, ira->ira_ill); freemsg(mp); if (ire != NULL) ire_refrele(ire); if (prev_ire != NULL) ire_refrele(prev_ire); return; } ire_refrele(prev_ire); ire_refrele(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: BUMP_MIB(&ipst->ips_icmp_mib, icmpInBadRedirects); ip_drop_input("icmpInBadRedirects - code", mp, ira->ira_ill); freemsg(mp); return; } /* * Create a Route Association. This will allow us to remember that * someone we believe told us to use the particular gateway. */ ire = ire_create( (uchar_t *)&dst, /* dest addr */ (uchar_t *)&ip_g_all_ones, /* mask */ (uchar_t *)&gateway, /* gateway addr */ IRE_HOST, NULL, /* ill */ ALL_ZONES, (RTF_DYNAMIC | RTF_GATEWAY | RTF_HOST), NULL, /* tsol_gc_t */ ipst); if (ire == NULL) { freemsg(mp); return; } nire = ire_add(ire); /* Check if it was a duplicate entry */ if (nire != NULL && nire != ire) { ASSERT(nire->ire_identical_ref > 1); ire_delete(nire); ire_refrele(nire); nire = NULL; } ire = nire; if (ire != NULL) { ire_refrele(ire); /* Held in ire_add */ /* 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), ipst); } /* * 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_v4(dst, 0, src, IRE_HOST, NULL, ALL_ZONES, NULL, (MATCH_IRE_GW | MATCH_IRE_TYPE), 0, ipst, NULL); 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. * When called from ip_output side a minimal ip_recv_attr_t needs to be * constructed by the caller. */ static void icmp_param_problem(mblk_t *mp, uint8_t ptr, ip_recv_attr_t *ira) { icmph_t icmph; ip_stack_t *ipst = ira->ira_ill->ill_ipst; mp = icmp_pkt_err_ok(mp, ira); if (mp == NULL) return; bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_PARAM_PROBLEM; icmph.icmph_pp_ptr = ptr; BUMP_MIB(&ipst->ips_icmp_mib, icmpOutParmProbs); icmp_pkt(mp, &icmph, sizeof (icmph_t), ira); } /* * 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 let ip_output_simple * pick the source address. */ static void icmp_pkt(mblk_t *mp, void *stuff, size_t len, ip_recv_attr_t *ira) { 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; ip_xmit_attr_t ixas; ip_stack_t *ipst = ira->ira_ill->ill_ipst; ipha = (ipha_t *)mp->b_rptr; bzero(&ixas, sizeof (ixas)); ixas.ixa_flags = IXAF_BASIC_SIMPLE_V4; ixas.ixa_zoneid = ira->ira_zoneid; ixas.ixa_ifindex = 0; ixas.ixa_ipst = ipst; ixas.ixa_cred = kcred; ixas.ixa_cpid = NOPID; ixas.ixa_tsl = ira->ira_tsl; /* Behave as a multi-level responder */ ixas.ixa_multicast_ttl = IP_DEFAULT_MULTICAST_TTL; if (ira->ira_flags & IRAF_IPSEC_SECURE) { /* * Apply IPsec based on how IPsec was applied to * the packet that had the error. * * If it was an outbound packet that caused the ICMP * error, then the caller will have setup the IRA * appropriately. */ if (!ipsec_in_to_out(ira, &ixas, mp, ipha, NULL)) { BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards); /* Note: mp already consumed and ip_drop_packet done */ return; } } else { /* * This is in clear. The icmp message we are building * here should go out in clear, independent of our policy. */ ixas.ixa_flags |= IXAF_NO_IPSEC; } /* Remember our eventual destination */ dst = ipha->ipha_src; /* * If the packet was for one of our unicast addresses, make * sure we respond with that as the source. Otherwise * have ip_output_simple pick the source address. */ ire = ire_ftable_lookup_v4(ipha->ipha_dst, 0, 0, (IRE_LOCAL|IRE_LOOPBACK), NULL, ira->ira_zoneid, NULL, MATCH_IRE_TYPE|MATCH_IRE_ZONEONLY, 0, ipst, NULL); if (ire != NULL) { ire_refrele(ire); src = ipha->ipha_dst; } else { src = INADDR_ANY; ixas.ixa_flags |= IXAF_SET_SOURCE; } /* * Check if we can send back more then 8 bytes in addition to * the IP header. We try to send 64 bytes of data and the internal * header in the special cases of ipv4 encapsulated ipv4 or ipv6. */ len_needed = IPH_HDR_LENGTH(ipha); if (ipha->ipha_protocol == IPPROTO_ENCAP || ipha->ipha_protocol == IPPROTO_IPV6) { if (!pullupmsg(mp, -1)) { BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards); ip_drop_output("ipIfStatsOutDiscards", mp, NULL); freemsg(mp); return; } ipha = (ipha_t *)mp->b_rptr; if (ipha->ipha_protocol == IPPROTO_ENCAP) { len_needed += IPH_HDR_LENGTH(((uchar_t *)ipha + len_needed)); } else { ip6_t *ip6h = (ip6_t *)((uchar_t *)ipha + len_needed); ASSERT(ipha->ipha_protocol == IPPROTO_IPV6); len_needed += ip_hdr_length_v6(mp, ip6h); } } len_needed += ipst->ips_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_MED); if (mp1 == NULL) { BUMP_MIB(&ipst->ips_icmp_mib, icmpOutErrors); freemsg(mp); return; } mp1->b_cont = mp; mp = mp1; /* * Set IXAF_TRUSTED_ICMP 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 IXAF_TRUSTED_ICMP). */ ixas.ixa_flags |= IXAF_TRUSTED_ICMP; 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 = ipst->ips_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); BUMP_MIB(&ipst->ips_icmp_mib, icmpOutMsgs); (void) ip_output_simple(mp, &ixas); ixa_cleanup(&ixas); } /* * 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(ip_stack_t *ipst) { clock_t now = TICK_TO_MSEC(ddi_get_lbolt()); uint_t refilled; /* Number of packets refilled in tbf since last */ /* Guard against changes by loading into local variable */ uint_t err_interval = ipst->ips_ip_icmp_err_interval; if (err_interval == 0) return (B_FALSE); if (ipst->ips_icmp_pkt_err_last > now) { /* 100HZ lbolt in ms for 32bit arch wraps every 49.7 days */ ipst->ips_icmp_pkt_err_last = 0; ipst->ips_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 (ipst->ips_icmp_pkt_err_sent != 0) { refilled = (now - ipst->ips_icmp_pkt_err_last)/err_interval; if (refilled > ipst->ips_icmp_pkt_err_sent) { ipst->ips_icmp_pkt_err_sent = 0; } else { ipst->ips_icmp_pkt_err_sent -= refilled; ipst->ips_icmp_pkt_err_last += refilled * err_interval; } } if (ipst->ips_icmp_pkt_err_sent == 0) { /* Start of new burst */ ipst->ips_icmp_pkt_err_last = now; } if (ipst->ips_icmp_pkt_err_sent < ipst->ips_ip_icmp_err_burst) { ipst->ips_icmp_pkt_err_sent++; ip1dbg(("icmp_err_rate_limit: %d sent in burst\n", ipst->ips_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, ip_recv_attr_t *ira) { ip_stack_t *ipst = ira->ira_ill->ill_ipst; icmph_t *icmph; ipha_t *ipha; uint_t len_needed; if (!mp) return (NULL); ipha = (ipha_t *)mp->b_rptr; if (ip_csum_hdr(ipha)) { BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsInCksumErrs); ip_drop_input("ipIfStatsInCksumErrs", mp, NULL); freemsg(mp); return (NULL); } if (ip_type_v4(ipha->ipha_dst, ipst) == IRE_BROADCAST || ip_type_v4(ipha->ipha_src, ipst) == IRE_BROADCAST || 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(&ipst->ips_icmp_mib, icmpOutDrops); freemsg(mp); 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(&ipst->ips_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(&ipst->ips_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, ira)) { ip2dbg(("icmp_pkt_err_ok: can't respond to packet\n")); BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDrops); freemsg(mp); return (NULL); } if (icmp_err_rate_limit(ipst)) { /* * 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); } /* * Called when a packet was sent out the same link that it arrived on. * Check if it is ok to send a redirect and then send it. */ void ip_send_potential_redirect_v4(mblk_t *mp, ipha_t *ipha, ire_t *ire, ip_recv_attr_t *ira) { ip_stack_t *ipst = ira->ira_ill->ill_ipst; ipaddr_t src, nhop; mblk_t *mp1; ire_t *nhop_ire; /* * 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., we matched an IRE_ONLINK), * or if the packet was source routed out this interface. * * 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. */ if ((ire->ire_type & IRE_ONLINK) || ip_source_routed(ipha, ipst)) return; nhop_ire = ire_nexthop(ire); if (nhop_ire == NULL) return; nhop = nhop_ire->ire_addr; if (nhop_ire->ire_type & IRE_IF_CLONE) { ire_t *ire2; /* Follow ire_dep_parent to find non-clone IRE_INTERFACE */ mutex_enter(&nhop_ire->ire_lock); ire2 = nhop_ire->ire_dep_parent; if (ire2 != NULL) ire_refhold(ire2); mutex_exit(&nhop_ire->ire_lock); ire_refrele(nhop_ire); nhop_ire = ire2; } if (nhop_ire == NULL) return; ASSERT(!(nhop_ire->ire_type & IRE_IF_CLONE)); src = ipha->ipha_src; /* * We look at the interface ire for the nexthop, * to see if ipha_src is in the same subnet * as the nexthop. */ if ((src & nhop_ire->ire_mask) == (nhop & nhop_ire->ire_mask)) { /* * The source is directly connected. */ mp1 = copymsg(mp); if (mp1 != NULL) { icmp_send_redirect(mp1, nhop, ira); } } ire_refrele(nhop_ire); } /* * Generate an ICMP redirect message. */ static void icmp_send_redirect(mblk_t *mp, ipaddr_t gateway, ip_recv_attr_t *ira) { icmph_t icmph; ip_stack_t *ipst = ira->ira_ill->ill_ipst; mp = icmp_pkt_err_ok(mp, ira); if (mp == NULL) return; bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_REDIRECT; icmph.icmph_code = 1; icmph.icmph_rd_gateway = gateway; BUMP_MIB(&ipst->ips_icmp_mib, icmpOutRedirects); icmp_pkt(mp, &icmph, sizeof (icmph_t), ira); } /* * Generate an ICMP time exceeded message. */ void icmp_time_exceeded(mblk_t *mp, uint8_t code, ip_recv_attr_t *ira) { icmph_t icmph; ip_stack_t *ipst = ira->ira_ill->ill_ipst; mp = icmp_pkt_err_ok(mp, ira); if (mp == NULL) return; bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_TIME_EXCEEDED; icmph.icmph_code = code; BUMP_MIB(&ipst->ips_icmp_mib, icmpOutTimeExcds); icmp_pkt(mp, &icmph, sizeof (icmph_t), ira); } /* * Generate an ICMP unreachable message. * When called from ip_output side a minimal ip_recv_attr_t needs to be * constructed by the caller. */ void icmp_unreachable(mblk_t *mp, uint8_t code, ip_recv_attr_t *ira) { icmph_t icmph; ip_stack_t *ipst = ira->ira_ill->ill_ipst; mp = icmp_pkt_err_ok(mp, ira); if (mp == NULL) return; bzero(&icmph, sizeof (icmph_t)); icmph.icmph_type = ICMP_DEST_UNREACHABLE; icmph.icmph_code = code; BUMP_MIB(&ipst->ips_icmp_mib, icmpOutDestUnreachs); icmp_pkt(mp, &icmph, sizeof (icmph_t), ira); } /* * Latch in the IPsec state for a stream based the policy in the listener * and the actions in the ip_recv_attr_t. * Called directly from TCP and SCTP. */ boolean_t ip_ipsec_policy_inherit(conn_t *connp, conn_t *lconnp, ip_recv_attr_t *ira) { ASSERT(lconnp->conn_policy != NULL); ASSERT(connp->conn_policy == NULL); IPPH_REFHOLD(lconnp->conn_policy); connp->conn_policy = lconnp->conn_policy; if (ira->ira_ipsec_action != NULL) { if (connp->conn_latch == NULL) { connp->conn_latch = iplatch_create(); if (connp->conn_latch == NULL) return (B_FALSE); } ipsec_latch_inbound(connp, ira); } return (B_TRUE); } /* * Verify whether or not the IP address is a valid local address. * Could be a unicast, including one for a down interface. * If allow_mcbc then a multicast or broadcast address is also * acceptable. * * In the case of a broadcast/multicast address, however, the * upper protocol is expected to reset the src address * to zero when we return IPVL_MCAST/IPVL_BCAST so that * no packets are emitted with broadcast/multicast address as * source address (that violates hosts requirements RFC 1122) * 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. * * 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. */ ip_laddr_t ip_laddr_verify_v4(ipaddr_t src_addr, zoneid_t zoneid, ip_stack_t *ipst, boolean_t allow_mcbc) { ire_t *src_ire; ASSERT(src_addr != INADDR_ANY); src_ire = ire_ftable_lookup_v4(src_addr, 0, 0, 0, NULL, zoneid, NULL, MATCH_IRE_ZONEONLY, 0, ipst, NULL); /* * If an address other than in6addr_any 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. */ if (src_ire != NULL && (src_ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK))) { /* * (2) Bind to address of local UP interface */ ire_refrele(src_ire); return (IPVL_UNICAST_UP); } else if (src_ire != NULL && src_ire->ire_type & IRE_BROADCAST) { /* * (4) Bind to broadcast address */ ire_refrele(src_ire); if (allow_mcbc) return (IPVL_BCAST); else return (IPVL_BAD); } else if (CLASSD(src_addr)) { /* (5) bind to multicast address. */ if (src_ire != NULL) ire_refrele(src_ire); if (allow_mcbc) return (IPVL_MCAST); else return (IPVL_BAD); } else { ipif_t *ipif; /* * (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) */ if (src_ire != NULL) ire_refrele(src_ire); ipif = ipif_lookup_addr(src_addr, NULL, zoneid, ipst); if (ipif == NULL) return (IPVL_BAD); /* Not a useful source? */ if (ipif->ipif_flags & (IPIF_NOLOCAL | IPIF_ANYCAST)) { ipif_refrele(ipif); return (IPVL_BAD); } ipif_refrele(ipif); return (IPVL_UNICAST_DOWN); } } /* * Insert in the bind fanout for IPv4 and IPv6. * The caller should already have used ip_laddr_verify_v*() before calling * this. */ int ip_laddr_fanout_insert(conn_t *connp) { int error; /* * Allow setting new policies. For example, disconnects result * in us being called. 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; error = ipcl_bind_insert(connp); if (error != 0) { if (connp->conn_anon_port) { (void) tsol_mlp_anon(crgetzone(connp->conn_cred), connp->conn_mlp_type, connp->conn_proto, ntohs(connp->conn_lport), B_FALSE); } connp->conn_mlp_type = mlptSingle; } return (error); } /* * Verify that both the source and destination addresses are valid. If * IPDF_VERIFY_DST is not set, 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. * * Determine the route, the interface, and (optionally) the source address * to use to reach a given destination. * Note that we allow connect to broadcast and multicast addresses when * IPDF_ALLOW_MCBC is set. * first_hop and dst_addr are normally the same, but if source routing * they will differ; in that case the first_hop is what we'll use for the * routing lookup but the dce and label checks will be done on dst_addr, * * If uinfo is set, then we fill in the best available information * we have for the destination. This is based on (in priority order) any * metrics and path MTU stored in a dce_t, route metrics, and finally the * ill_mtu/ill_mc_mtu. * * Tsol note: If we have a source route then dst_addr != firsthop. But we * always do the label check on dst_addr. */ int ip_set_destination_v4(ipaddr_t *src_addrp, ipaddr_t dst_addr, ipaddr_t firsthop, ip_xmit_attr_t *ixa, iulp_t *uinfo, uint32_t flags, uint_t mac_mode) { ire_t *ire = NULL; int error = 0; ipaddr_t setsrc; /* RTF_SETSRC */ zoneid_t zoneid = ixa->ixa_zoneid; /* Honors SO_ALLZONES */ ip_stack_t *ipst = ixa->ixa_ipst; dce_t *dce; uint_t pmtu; uint_t generation; nce_t *nce; ill_t *ill = NULL; boolean_t multirt = B_FALSE; ASSERT(ixa->ixa_flags & IXAF_IS_IPV4); /* * We never send to zero; the ULPs map it to the loopback address. * We can't allow it since we use zero to mean unitialized in some * places. */ ASSERT(dst_addr != INADDR_ANY); if (is_system_labeled()) { ts_label_t *tsl = NULL; error = tsol_check_dest(ixa->ixa_tsl, &dst_addr, IPV4_VERSION, mac_mode, (flags & IPDF_ZONE_IS_GLOBAL) != 0, &tsl); if (error != 0) return (error); if (tsl != NULL) { /* Update the label */ ip_xmit_attr_replace_tsl(ixa, tsl); } } setsrc = INADDR_ANY; /* * Select a route; For IPMP interfaces, we would only select * a "hidden" route (i.e., going through a specific under_ill) * if ixa_ifindex has been specified. */ ire = ip_select_route_v4(firsthop, *src_addrp, ixa, &generation, &setsrc, &error, &multirt); ASSERT(ire != NULL); /* IRE_NOROUTE if none found */ if (error != 0) goto bad_addr; /* * ire can't be a broadcast or multicast unless IPDF_ALLOW_MCBC is set. * If IPDF_VERIFY_DST is set, the destination must be reachable; * Otherwise 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 (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { /* * 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. * * In both cases do we let the code continue so some reasonable * information is returned to the caller. That enables the * caller to use (and even cache) the IRE. conn_ip_ouput will * use the generation mismatch path to check for the unreachable * case thereby avoiding any specific check in the main path. */ ASSERT(generation == IRE_GENERATION_VERIFY); if (flags & IPDF_VERIFY_DST) { /* * Set errno but continue to set up ixa_ire to be * the RTF_REJECT|RTF_BLACKHOLE IRE. * That allows callers to use ip_output to get an * ICMP error back. */ if (!(ire->ire_type & IRE_HOST)) error = ENETUNREACH; else error = EHOSTUNREACH; } } if ((ire->ire_type & (IRE_BROADCAST|IRE_MULTICAST)) && !(flags & IPDF_ALLOW_MCBC)) { ire_refrele(ire); ire = ire_reject(ipst, B_FALSE); generation = IRE_GENERATION_VERIFY; error = ENETUNREACH; } /* Cache things */ if (ixa->ixa_ire != NULL) ire_refrele_notr(ixa->ixa_ire); #ifdef DEBUG ire_refhold_notr(ire); ire_refrele(ire); #endif ixa->ixa_ire = ire; ixa->ixa_ire_generation = generation; /* * Ensure that ixa_dce is always set any time that ixa_ire is set, * since some callers will send a packet to conn_ip_output() even if * there's an error. */ if (flags & IPDF_UNIQUE_DCE) { /* Fallback to the default dce if allocation fails */ dce = dce_lookup_and_add_v4(dst_addr, ipst); if (dce != NULL) generation = dce->dce_generation; else dce = dce_lookup_v4(dst_addr, ipst, &generation); } else { dce = dce_lookup_v4(dst_addr, ipst, &generation); } ASSERT(dce != NULL); if (ixa->ixa_dce != NULL) dce_refrele_notr(ixa->ixa_dce); #ifdef DEBUG dce_refhold_notr(dce); dce_refrele(dce); #endif ixa->ixa_dce = dce; ixa->ixa_dce_generation = generation; /* * For multicast with multirt we have a flag passed back from * ire_lookup_multi_ill_v4 since we don't have an IRE for each * possible multicast address. * We also need a flag for multicast since we can't check * whether RTF_MULTIRT is set in ixa_ire for multicast. */ if (multirt) { ixa->ixa_postfragfn = ip_postfrag_multirt_v4; ixa->ixa_flags |= IXAF_MULTIRT_MULTICAST; } else { ixa->ixa_postfragfn = ire->ire_postfragfn; ixa->ixa_flags &= ~IXAF_MULTIRT_MULTICAST; } if (!(ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))) { /* Get an nce to cache. */ nce = ire_to_nce(ire, firsthop, NULL); if (nce == NULL) { /* Allocation failure? */ ixa->ixa_ire_generation = IRE_GENERATION_VERIFY; } else { if (ixa->ixa_nce != NULL) nce_refrele(ixa->ixa_nce); ixa->ixa_nce = nce; } } /* * If the source address is a loopback address, the * destination had best be local or multicast. * If we are sending to an IRE_LOCAL using a loopback source then * it had better be the same zoneid. */ if (*src_addrp == htonl(INADDR_LOOPBACK)) { if ((ire->ire_type & IRE_LOCAL) && ire->ire_zoneid != zoneid) { ire = NULL; /* Stored in ixa_ire */ error = EADDRNOTAVAIL; goto bad_addr; } if (!(ire->ire_type & (IRE_LOOPBACK|IRE_LOCAL|IRE_MULTICAST))) { ire = NULL; /* Stored in ixa_ire */ error = EADDRNOTAVAIL; goto bad_addr; } } if (ire->ire_type & IRE_BROADCAST) { /* * If the ULP didn't have a specified source, then we * make sure we reselect the source when sending * broadcasts out different interfaces. */ if (flags & IPDF_SELECT_SRC) ixa->ixa_flags |= IXAF_SET_SOURCE; else ixa->ixa_flags &= ~IXAF_SET_SOURCE; } /* * Does the caller want us to pick a source address? */ if (flags & IPDF_SELECT_SRC) { ipaddr_t src_addr; /* * We use use ire_nexthop_ill to avoid the under ipmp * interface for source address selection. Note that for ipmp * probe packets, ixa_ifindex would have been specified, and * the ip_select_route() invocation would have picked an ire * will ire_ill pointing at an under interface. */ ill = ire_nexthop_ill(ire); /* If unreachable we have no ill but need some source */ if (ill == NULL) { src_addr = htonl(INADDR_LOOPBACK); /* Make sure we look for a better source address */ generation = SRC_GENERATION_VERIFY; } else { error = ip_select_source_v4(ill, setsrc, dst_addr, ixa->ixa_multicast_ifaddr, zoneid, ipst, &src_addr, &generation, NULL); if (error != 0) { ire = NULL; /* Stored in ixa_ire */ goto bad_addr; } } /* * We allow the source address to to down. * However, we check that we don't use the loopback address * as a source when sending out on the wire. */ if ((src_addr == htonl(INADDR_LOOPBACK)) && !(ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK|IRE_MULTICAST)) && !(ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))) { ire = NULL; /* Stored in ixa_ire */ error = EADDRNOTAVAIL; goto bad_addr; } *src_addrp = src_addr; ixa->ixa_src_generation = generation; } /* * Make sure we don't leave an unreachable ixa_nce in place * since ip_select_route is used when we unplumb i.e., remove * references on ixa_ire, ixa_nce, and ixa_dce. */ nce = ixa->ixa_nce; if (nce != NULL && nce->nce_is_condemned) { nce_refrele(nce); ixa->ixa_nce = NULL; ixa->ixa_ire_generation = IRE_GENERATION_VERIFY; } /* * The caller has set IXAF_PMTU_DISCOVERY if path MTU is desired. * However, we can't do it for IPv4 multicast or broadcast. */ if (ire->ire_type & (IRE_BROADCAST|IRE_MULTICAST)) ixa->ixa_flags &= ~IXAF_PMTU_DISCOVERY; /* * Set initial value for fragmentation limit. Either conn_ip_output * or ULP might updates it when there are routing changes. * Handles a NULL ixa_ire->ire_ill or a NULL ixa_nce for RTF_REJECT. */ pmtu = ip_get_pmtu(ixa); ixa->ixa_fragsize = pmtu; /* Make sure ixa_fragsize and ixa_pmtu remain identical */ if (ixa->ixa_flags & IXAF_VERIFY_PMTU) ixa->ixa_pmtu = pmtu; /* * Extract information useful for some transports. * First we look for DCE metrics. Then we take what we have in * the metrics in the route, where the offlink is used if we have * one. */ if (uinfo != NULL) { bzero(uinfo, sizeof (*uinfo)); if (dce->dce_flags & DCEF_UINFO) *uinfo = dce->dce_uinfo; rts_merge_metrics(uinfo, &ire->ire_metrics); /* Allow ire_metrics to decrease the path MTU from above */ if (uinfo->iulp_mtu == 0 || uinfo->iulp_mtu > pmtu) uinfo->iulp_mtu = pmtu; uinfo->iulp_localnet = (ire->ire_type & IRE_ONLINK) != 0; uinfo->iulp_loopback = (ire->ire_type & IRE_LOOPBACK) != 0; uinfo->iulp_local = (ire->ire_type & IRE_LOCAL) != 0; } if (ill != NULL) ill_refrele(ill); return (error); bad_addr: if (ire != NULL) ire_refrele(ire); if (ill != NULL) ill_refrele(ill); /* * Make sure we don't leave an unreachable ixa_nce in place * since ip_select_route is used when we unplumb i.e., remove * references on ixa_ire, ixa_nce, and ixa_dce. */ nce = ixa->ixa_nce; if (nce != NULL && nce->nce_is_condemned) { nce_refrele(nce); ixa->ixa_nce = NULL; ixa->ixa_ire_generation = IRE_GENERATION_VERIFY; } return (error); } /* * Get the base MTU for the case when path MTU discovery is not used. * Takes the MTU of the IRE into account. */ uint_t ip_get_base_mtu(ill_t *ill, ire_t *ire) { uint_t mtu; uint_t iremtu = ire->ire_metrics.iulp_mtu; if (ire->ire_type & (IRE_MULTICAST|IRE_BROADCAST)) mtu = ill->ill_mc_mtu; else mtu = ill->ill_mtu; if (iremtu != 0 && iremtu < mtu) mtu = iremtu; return (mtu); } /* * Get the PMTU for the attributes. Handles both IPv4 and IPv6. * Assumes that ixa_ire, dce, and nce have already been set up. * * The caller has set IXAF_PMTU_DISCOVERY if path MTU discovery is desired. * We avoid path MTU discovery if it is disabled with ndd. * Furtermore, if the path MTU is too small, then we don't set DF for IPv4. * * NOTE: We also used to turn it off for source routed packets. That * is no longer required since the dce is per final destination. */ uint_t ip_get_pmtu(ip_xmit_attr_t *ixa) { ip_stack_t *ipst = ixa->ixa_ipst; dce_t *dce; nce_t *nce; ire_t *ire; uint_t pmtu; ire = ixa->ixa_ire; dce = ixa->ixa_dce; nce = ixa->ixa_nce; /* * If path MTU discovery has been turned off by ndd, then we ignore * any dce_pmtu and for IPv4 we will not set DF. */ if (!ipst->ips_ip_path_mtu_discovery) ixa->ixa_flags &= ~IXAF_PMTU_DISCOVERY; pmtu = IP_MAXPACKET; /* * Decide whether whether IPv4 sets DF * For IPv6 "no DF" means to use the 1280 mtu */ if (ixa->ixa_flags & IXAF_PMTU_DISCOVERY) { ixa->ixa_flags |= IXAF_PMTU_IPV4_DF; } else { ixa->ixa_flags &= ~IXAF_PMTU_IPV4_DF; if (!(ixa->ixa_flags & IXAF_IS_IPV4)) pmtu = IPV6_MIN_MTU; } /* Check if the PMTU is to old before we use it */ if ((dce->dce_flags & DCEF_PMTU) && TICK_TO_SEC(ddi_get_lbolt64()) - dce->dce_last_change_time > ipst->ips_ip_pathmtu_interval) { /* * Older than 20 minutes. Drop the path MTU information. */ mutex_enter(&dce->dce_lock); dce->dce_flags &= ~(DCEF_PMTU|DCEF_TOO_SMALL_PMTU); dce->dce_last_change_time = TICK_TO_SEC(ddi_get_lbolt64()); mutex_exit(&dce->dce_lock); dce_increment_generation(dce); } /* The metrics on the route can lower the path MTU */ if (ire->ire_metrics.iulp_mtu != 0 && ire->ire_metrics.iulp_mtu < pmtu) pmtu = ire->ire_metrics.iulp_mtu; /* * If the path MTU is smaller than some minimum, we still use dce_pmtu * above (would be 576 for IPv4 and 1280 for IPv6), but we clear * IXAF_PMTU_IPV4_DF so that we avoid setting DF for IPv4. */ if (ixa->ixa_flags & IXAF_PMTU_DISCOVERY) { if (dce->dce_flags & DCEF_PMTU) { if (dce->dce_pmtu < pmtu) pmtu = dce->dce_pmtu; if (dce->dce_flags & DCEF_TOO_SMALL_PMTU) { ixa->ixa_flags |= IXAF_PMTU_TOO_SMALL; ixa->ixa_flags &= ~IXAF_PMTU_IPV4_DF; } else { ixa->ixa_flags &= ~IXAF_PMTU_TOO_SMALL; ixa->ixa_flags |= IXAF_PMTU_IPV4_DF; } } else { ixa->ixa_flags &= ~IXAF_PMTU_TOO_SMALL; ixa->ixa_flags |= IXAF_PMTU_IPV4_DF; } } /* * If we have an IRE_LOCAL we use the loopback mtu instead of * the ill for going out the wire i.e., IRE_LOCAL gets the same * mtu as IRE_LOOPBACK. */ if (ire->ire_type & (IRE_LOCAL|IRE_LOOPBACK)) { uint_t loopback_mtu; loopback_mtu = (ire->ire_ipversion == IPV6_VERSION) ? ip_loopback_mtu_v6plus : ip_loopback_mtuplus; if (loopback_mtu < pmtu) pmtu = loopback_mtu; } else if (nce != NULL) { /* * Make sure we don't exceed the interface MTU. * In the case of RTF_REJECT or RTF_BLACKHOLE we might not have * an ill. We'd use the above IP_MAXPACKET in that case just * to tell the transport something larger than zero. */ if (ire->ire_type & (IRE_MULTICAST|IRE_BROADCAST)) { if (nce->nce_common->ncec_ill->ill_mc_mtu < pmtu) pmtu = nce->nce_common->ncec_ill->ill_mc_mtu; if (nce->nce_common->ncec_ill != nce->nce_ill && nce->nce_ill->ill_mc_mtu < pmtu) { /* * for interfaces in an IPMP group, the mtu of * the nce_ill (under_ill) could be different * from the mtu of the ncec_ill, so we take the * min of the two. */ pmtu = nce->nce_ill->ill_mc_mtu; } } else { if (nce->nce_common->ncec_ill->ill_mtu < pmtu) pmtu = nce->nce_common->ncec_ill->ill_mtu; if (nce->nce_common->ncec_ill != nce->nce_ill && nce->nce_ill->ill_mtu < pmtu) { /* * for interfaces in an IPMP group, the mtu of * the nce_ill (under_ill) could be different * from the mtu of the ncec_ill, so we take the * min of the two. */ pmtu = nce->nce_ill->ill_mtu; } } } /* * Handle the IPV6_USE_MIN_MTU socket option or ancillary data. * Only applies to IPv6. */ if (!(ixa->ixa_flags & IXAF_IS_IPV4)) { if (ixa->ixa_flags & IXAF_USE_MIN_MTU) { switch (ixa->ixa_use_min_mtu) { case IPV6_USE_MIN_MTU_MULTICAST: if (ire->ire_type & IRE_MULTICAST) pmtu = IPV6_MIN_MTU; break; case IPV6_USE_MIN_MTU_ALWAYS: pmtu = IPV6_MIN_MTU; break; case IPV6_USE_MIN_MTU_NEVER: break; } } else { /* Default is IPV6_USE_MIN_MTU_MULTICAST */ if (ire->ire_type & IRE_MULTICAST) pmtu = IPV6_MIN_MTU; } } /* * After receiving an ICMPv6 "packet too big" message with a * MTU < 1280, and for multirouted IPv6 packets, the IP layer * will insert a 8-byte fragment header in every packet. We compensate * for those cases by returning a smaller path MTU to the ULP. * * In the case of CGTP then ip_output will add a fragment header. * Make sure there is room for it by telling a smaller number * to the transport. * * When IXAF_IPV6_ADDR_FRAGHDR we subtract the frag hdr here * so the ULPs consistently see a iulp_pmtu and ip_get_pmtu() * which is the size of the packets it can send. */ if (!(ixa->ixa_flags & IXAF_IS_IPV4)) { if ((dce->dce_flags & DCEF_TOO_SMALL_PMTU) || (ire->ire_flags & RTF_MULTIRT) || (ixa->ixa_flags & IXAF_MULTIRT_MULTICAST)) { pmtu -= sizeof (ip6_frag_t); ixa->ixa_flags |= IXAF_IPV6_ADD_FRAGHDR; } } return (pmtu); } /* * 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; ip_stack_t *ipst = ill->ill_ipst; int i; arl_ill_common_t *ai = ill->ill_common; /* * The punlink prior to this may have initiated a capability * negotiation. But ipsq_enter will block until that finishes or * times out. */ success = ipsq_enter(ill, B_FALSE, NEW_OP); /* * 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); /* * Send all the deferred DLPI messages downstream which came in * during the small window right before ipsq_enter(). We do this * without waiting for the ACKs because all the ACKs for M_PROTO * messages are ignored in ip_rput() when ILL_CONDEMNED is set. */ ill_dlpi_send_deferred(ill); /* * 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); /* * 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_freeable 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_REQ with the driver and then qprocsoff. */ ill_delete(ill); mutex_enter(&ill->ill_lock); while (!ill_is_freeable(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); /* * ill_delete_tail drops reference on ill_ipst, but we need to keep * it held until the end of the function since the cleanup * below needs to be able to use the ip_stack_t. */ netstack_hold(ipst->ips_netstack); /* qprocsoff is done via ill_delete_tail */ ill_delete_tail(ill); /* * synchronously wait for arp stream to unbind. After this, we * cannot get any data packets up from the driver. */ arp_unbind_complete(ill); ASSERT(ill->ill_ipst == NULL); /* * Walk through all conns 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")); for (i = 0; i < TX_FANOUT_SIZE; i++) { conn_walk_drain(ipst, &ipst->ips_idl_tx_list[i]); } /* * ai can be null if this is an IPv6 ill, or if the IPv4 * stream is being torn down before ARP was plumbed (e.g., * /sbin/ifconfig plumbing a stream twice, and encountering * an error */ if (ai != NULL) { ASSERT(!ill->ill_isv6); mutex_enter(&ai->ai_lock); ai->ai_ill = NULL; if (ai->ai_arl == NULL) { mutex_destroy(&ai->ai_lock); kmem_free(ai, sizeof (*ai)); } else { cv_signal(&ai->ai_ill_unplumb_done); mutex_exit(&ai->ai_lock); } } mutex_enter(&ipst->ips_ip_mi_lock); mi_close_unlink(&ipst->ips_ip_g_head, (IDP)ill); mutex_exit(&ipst->ips_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); mutex_destroy(&ill->ill_saved_ire_lock); mutex_destroy(&ill->ill_lock); rw_destroy(&ill->ill_mcast_lock); mutex_destroy(&ill->ill_mcast_serializer); list_destroy(&ill->ill_nce); /* * Now we are done with the module close pieces that * need the netstack_t. */ netstack_rele(ipst->ips_netstack); mi_close_free((IDP)ill); q->q_ptr = WR(q)->q_ptr = NULL; ipsq_exit(ipsq); return (0); } /* * This is called as part of close() for IP, UDP, ICMP, and RTS * 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; ip_stack_t *ipst; ASSERT(!IPCL_IS_TCP(connp)); ipst = connp->conn_netstack->netstack_ip; /* * 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. * * conn_idl, and 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_dhcpinit_ill != NULL) { ASSERT(connp->conn_dhcpinit_ill->ill_dhcpinit != 0); atomic_dec_32(&connp->conn_dhcpinit_ill->ill_dhcpinit); ill_set_inputfn(connp->conn_dhcpinit_ill); connp->conn_dhcpinit_ill = NULL; } if (connp->conn_ilg != NULL) ilg_cleanup_reqd = B_TRUE; mutex_exit(&connp->conn_lock); 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_proto, 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. (TCP conns are never flow controlled, and * conn_idl will be NULL.) */ if (drain_cleanup_reqd && connp->conn_idl != NULL) { idl_t *idl = connp->conn_idl; mutex_enter(&idl->idl_lock); conn_drain(connp, B_TRUE); mutex_exit(&idl->idl_lock); } if (connp == ipst->ips_ip_g_mrouter) (void) ip_mrouter_done(ipst); if (ilg_cleanup_reqd) ilg_delete_all(connp); /* * 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; /* * 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); inet_minor_free(connp->conn_minor_arena, connp->conn_dev); connp->conn_ref--; ipcl_conn_destroy(connp); q->q_ptr = WR(q)->q_ptr = NULL; return (0); } /* * Wapper around putnext() so that ip_rts_request can merely use * conn_recv. */ /*ARGSUSED2*/ static void ip_conn_input(void *arg1, mblk_t *mp, void *arg2, ip_recv_attr_t *ira) { conn_t *connp = (conn_t *)arg1; putnext(connp->conn_rq, mp); } /* Dummy in case ICMP error delivery is attempted to a /dev/ip instance */ /* ARGSUSED */ static void ip_conn_input_icmp(void *arg1, mblk_t *mp, void *arg2, ip_recv_attr_t *ira) { freemsg(mp); } /* * Called when the module is about to be unloaded */ void ip_ddi_destroy(void) { /* This needs to be called before destroying any transports. */ mutex_enter(&cpu_lock); unregister_cpu_setup_func(ip_tp_cpu_update, NULL); mutex_exit(&cpu_lock); tnet_fini(); icmp_ddi_g_destroy(); rts_ddi_g_destroy(); udp_ddi_g_destroy(); sctp_ddi_g_destroy(); tcp_ddi_g_destroy(); ilb_ddi_g_destroy(); dce_g_destroy(); ipsec_policy_g_destroy(); ipcl_g_destroy(); ip_net_g_destroy(); ip_ire_g_fini(); inet_minor_destroy(ip_minor_arena_sa); #if defined(_LP64) inet_minor_destroy(ip_minor_arena_la); #endif #ifdef DEBUG list_destroy(&ip_thread_list); rw_destroy(&ip_thread_rwlock); tsd_destroy(&ip_thread_data); #endif netstack_unregister(NS_IP); } /* * First step in cleanup. */ /* ARGSUSED */ static void ip_stack_shutdown(netstackid_t stackid, void *arg) { ip_stack_t *ipst = (ip_stack_t *)arg; kt_did_t ktid; #ifdef NS_DEBUG printf("ip_stack_shutdown(%p, stack %d)\n", (void *)ipst, stackid); #endif /* * Perform cleanup for special interfaces (loopback and IPMP). */ ip_interface_cleanup(ipst); /* * The *_hook_shutdown()s start the process of notifying any * consumers that things are going away.... nothing is destroyed. */ ipv4_hook_shutdown(ipst); ipv6_hook_shutdown(ipst); arp_hook_shutdown(ipst); mutex_enter(&ipst->ips_capab_taskq_lock); ktid = ipst->ips_capab_taskq_thread->t_did; ipst->ips_capab_taskq_quit = B_TRUE; cv_signal(&ipst->ips_capab_taskq_cv); mutex_exit(&ipst->ips_capab_taskq_lock); /* * In rare occurrences, particularly on virtual hardware where CPUs can * be de-scheduled, the thread that we just signaled will not run until * after we have gotten through parts of ip_stack_fini. If that happens * then we'll try to grab the ips_capab_taskq_lock as part of returning * from cv_wait which no longer exists. */ thread_join(ktid); } /* * Free the IP stack instance. */ static void ip_stack_fini(netstackid_t stackid, void *arg) { ip_stack_t *ipst = (ip_stack_t *)arg; int ret; #ifdef NS_DEBUG printf("ip_stack_fini(%p, stack %d)\n", (void *)ipst, stackid); #endif /* * At this point, all of the notifications that the events and * protocols are going away have been run, meaning that we can * now set about starting to clean things up. */ ipobs_fini(ipst); ipv4_hook_destroy(ipst); ipv6_hook_destroy(ipst); arp_hook_destroy(ipst); ip_net_destroy(ipst); ipmp_destroy(ipst); ip_kstat_fini(stackid, ipst->ips_ip_mibkp); ipst->ips_ip_mibkp = NULL; icmp_kstat_fini(stackid, ipst->ips_icmp_mibkp); ipst->ips_icmp_mibkp = NULL; ip_kstat2_fini(stackid, ipst->ips_ip_kstat); ipst->ips_ip_kstat = NULL; bzero(&ipst->ips_ip_statistics, sizeof (ipst->ips_ip_statistics)); ip6_kstat_fini(stackid, ipst->ips_ip6_kstat); ipst->ips_ip6_kstat = NULL; bzero(&ipst->ips_ip6_statistics, sizeof (ipst->ips_ip6_statistics)); kmem_free(ipst->ips_propinfo_tbl, ip_propinfo_count * sizeof (mod_prop_info_t)); ipst->ips_propinfo_tbl = NULL; dce_stack_destroy(ipst); ip_mrouter_stack_destroy(ipst); ret = untimeout(ipst->ips_igmp_timeout_id); if (ret == -1) { ASSERT(ipst->ips_igmp_timeout_id == 0); } else { ASSERT(ipst->ips_igmp_timeout_id != 0); ipst->ips_igmp_timeout_id = 0; } ret = untimeout(ipst->ips_igmp_slowtimeout_id); if (ret == -1) { ASSERT(ipst->ips_igmp_slowtimeout_id == 0); } else { ASSERT(ipst->ips_igmp_slowtimeout_id != 0); ipst->ips_igmp_slowtimeout_id = 0; } ret = untimeout(ipst->ips_mld_timeout_id); if (ret == -1) { ASSERT(ipst->ips_mld_timeout_id == 0); } else { ASSERT(ipst->ips_mld_timeout_id != 0); ipst->ips_mld_timeout_id = 0; } ret = untimeout(ipst->ips_mld_slowtimeout_id); if (ret == -1) { ASSERT(ipst->ips_mld_slowtimeout_id == 0); } else { ASSERT(ipst->ips_mld_slowtimeout_id != 0); ipst->ips_mld_slowtimeout_id = 0; } ip_ire_fini(ipst); ip6_asp_free(ipst); conn_drain_fini(ipst); ipcl_destroy(ipst); mutex_destroy(&ipst->ips_ndp4->ndp_g_lock); mutex_destroy(&ipst->ips_ndp6->ndp_g_lock); kmem_free(ipst->ips_ndp4, sizeof (ndp_g_t)); ipst->ips_ndp4 = NULL; kmem_free(ipst->ips_ndp6, sizeof (ndp_g_t)); ipst->ips_ndp6 = NULL; if (ipst->ips_loopback_ksp != NULL) { kstat_delete_netstack(ipst->ips_loopback_ksp, stackid); ipst->ips_loopback_ksp = NULL; } mutex_destroy(&ipst->ips_capab_taskq_lock); cv_destroy(&ipst->ips_capab_taskq_cv); rw_destroy(&ipst->ips_srcid_lock); mutex_destroy(&ipst->ips_ip_mi_lock); rw_destroy(&ipst->ips_ill_g_usesrc_lock); mutex_destroy(&ipst->ips_igmp_timer_lock); mutex_destroy(&ipst->ips_mld_timer_lock); mutex_destroy(&ipst->ips_igmp_slowtimeout_lock); mutex_destroy(&ipst->ips_mld_slowtimeout_lock); mutex_destroy(&ipst->ips_ip_addr_avail_lock); rw_destroy(&ipst->ips_ill_g_lock); kmem_free(ipst->ips_phyint_g_list, sizeof (phyint_list_t)); ipst->ips_phyint_g_list = NULL; kmem_free(ipst->ips_ill_g_heads, sizeof (ill_g_head_t) * MAX_G_HEADS); ipst->ips_ill_g_heads = NULL; ldi_ident_release(ipst->ips_ldi_ident); kmem_free(ipst, sizeof (*ipst)); } /* * This function is called from the TSD destructor, and is used to debug * reference count issues in IP. See block comment in for * details. */ static void ip_thread_exit(void *phash) { th_hash_t *thh = phash; rw_enter(&ip_thread_rwlock, RW_WRITER); list_remove(&ip_thread_list, thh); rw_exit(&ip_thread_rwlock); mod_hash_destroy_hash(thh->thh_hash); kmem_free(thh, sizeof (*thh)); } /* * Called when the IP kernel module is loaded into the kernel */ void ip_ddi_init(void) { ip_squeue_flag = ip_squeue_switch(ip_squeue_enter); /* * For IP and TCP the minor numbers should start from 2 since we have 4 * initial devices: ip, ip6, tcp, tcp6. */ /* * If this is a 64-bit kernel, then create two separate arenas - * one for TLIs in the range of INET_MIN_DEV+2 through 2^^18-1, and the * other for socket apps in the range 2^^18 through 2^^32-1. */ ip_minor_arena_la = NULL; ip_minor_arena_sa = NULL; #if defined(_LP64) if ((ip_minor_arena_sa = inet_minor_create("ip_minor_arena_sa", INET_MIN_DEV + 2, MAXMIN32, KM_SLEEP)) == NULL) { cmn_err(CE_PANIC, "ip_ddi_init: ip_minor_arena_sa creation failed\n"); } if ((ip_minor_arena_la = inet_minor_create("ip_minor_arena_la", MAXMIN32 + 1, MAXMIN64, KM_SLEEP)) == NULL) { cmn_err(CE_PANIC, "ip_ddi_init: ip_minor_arena_la creation failed\n"); } #else if ((ip_minor_arena_sa = inet_minor_create("ip_minor_arena_sa", INET_MIN_DEV + 2, MAXMIN, KM_SLEEP)) == NULL) { cmn_err(CE_PANIC, "ip_ddi_init: ip_minor_arena_sa creation failed\n"); } #endif ip_poll_normal_ticks = MSEC_TO_TICK_ROUNDUP(ip_poll_normal_ms); ipcl_g_init(); ip_ire_g_init(); ip_net_g_init(); #ifdef DEBUG tsd_create(&ip_thread_data, ip_thread_exit); rw_init(&ip_thread_rwlock, NULL, RW_DEFAULT, NULL); list_create(&ip_thread_list, sizeof (th_hash_t), offsetof(th_hash_t, thh_link)); #endif ipsec_policy_g_init(); tcp_ddi_g_init(); sctp_ddi_g_init(); dce_g_init(); /* * We want to be informed each time a stack is created or * destroyed in the kernel, so we can maintain the * set of udp_stack_t's. */ netstack_register(NS_IP, ip_stack_init, ip_stack_shutdown, ip_stack_fini); tnet_init(); udp_ddi_g_init(); rts_ddi_g_init(); icmp_ddi_g_init(); ilb_ddi_g_init(); /* This needs to be called after all transports are initialized. */ mutex_enter(&cpu_lock); register_cpu_setup_func(ip_tp_cpu_update, NULL); mutex_exit(&cpu_lock); } /* * Initialize the IP stack instance. */ static void * ip_stack_init(netstackid_t stackid, netstack_t *ns) { ip_stack_t *ipst; size_t arrsz; major_t major; #ifdef NS_DEBUG printf("ip_stack_init(stack %d)\n", stackid); #endif ipst = (ip_stack_t *)kmem_zalloc(sizeof (*ipst), KM_SLEEP); ipst->ips_netstack = ns; ipst->ips_ill_g_heads = kmem_zalloc(sizeof (ill_g_head_t) * MAX_G_HEADS, KM_SLEEP); ipst->ips_phyint_g_list = kmem_zalloc(sizeof (phyint_list_t), KM_SLEEP); ipst->ips_ndp4 = kmem_zalloc(sizeof (ndp_g_t), KM_SLEEP); ipst->ips_ndp6 = kmem_zalloc(sizeof (ndp_g_t), KM_SLEEP); mutex_init(&ipst->ips_ndp4->ndp_g_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&ipst->ips_ndp6->ndp_g_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&ipst->ips_igmp_timer_lock, NULL, MUTEX_DEFAULT, NULL); ipst->ips_igmp_deferred_next = INFINITY; mutex_init(&ipst->ips_mld_timer_lock, NULL, MUTEX_DEFAULT, NULL); ipst->ips_mld_deferred_next = INFINITY; mutex_init(&ipst->ips_igmp_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&ipst->ips_mld_slowtimeout_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&ipst->ips_ip_mi_lock, NULL, MUTEX_DEFAULT, NULL); mutex_init(&ipst->ips_ip_addr_avail_lock, NULL, MUTEX_DEFAULT, NULL); rw_init(&ipst->ips_ill_g_lock, NULL, RW_DEFAULT, NULL); rw_init(&ipst->ips_ill_g_usesrc_lock, NULL, RW_DEFAULT, NULL); ipcl_init(ipst); ip_ire_init(ipst); ip6_asp_init(ipst); ipif_init(ipst); conn_drain_init(ipst); ip_mrouter_stack_init(ipst); dce_stack_init(ipst); ipst->ips_ip_multirt_log_interval = 1000; ipst->ips_ill_index = 1; ipst->ips_saved_ip_forwarding = -1; ipst->ips_reg_vif_num = ALL_VIFS; /* Index to Register vif */ arrsz = ip_propinfo_count * sizeof (mod_prop_info_t); ipst->ips_propinfo_tbl = (mod_prop_info_t *)kmem_alloc(arrsz, KM_SLEEP); bcopy(ip_propinfo_tbl, ipst->ips_propinfo_tbl, arrsz); ipst->ips_ip_mibkp = ip_kstat_init(stackid, ipst); ipst->ips_icmp_mibkp = icmp_kstat_init(stackid); ipst->ips_ip_kstat = ip_kstat2_init(stackid, &ipst->ips_ip_statistics); ipst->ips_ip6_kstat = ip6_kstat_init(stackid, &ipst->ips_ip6_statistics); ipst->ips_ip_src_id = 1; rw_init(&ipst->ips_srcid_lock, NULL, RW_DEFAULT, NULL); ipst->ips_src_generation = SRC_GENERATION_INITIAL; ip_net_init(ipst, ns); ipv4_hook_init(ipst); ipv6_hook_init(ipst); arp_hook_init(ipst); ipmp_init(ipst); ipobs_init(ipst); /* * Create the taskq dispatcher thread and initialize related stuff. */ mutex_init(&ipst->ips_capab_taskq_lock, NULL, MUTEX_DEFAULT, NULL); cv_init(&ipst->ips_capab_taskq_cv, NULL, CV_DEFAULT, NULL); ipst->ips_capab_taskq_thread = thread_create(NULL, 0, ill_taskq_dispatch, ipst, 0, &p0, TS_RUN, minclsyspri); major = mod_name_to_major(INET_NAME); (void) ldi_ident_from_major(major, &ipst->ips_ldi_ident); return (ipst); } /* * 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); } /* * Allocate and initialize a DLPI notification. (May be called as writer.) */ mblk_t * ip_dlnotify_alloc(uint_t notification, uint_t data) { dl_notify_ind_t *notifyp; mblk_t *mp; if ((mp = ip_dlpi_alloc(DL_NOTIFY_IND_SIZE, DL_NOTIFY_IND)) == NULL) return (NULL); notifyp = (dl_notify_ind_t *)mp->b_rptr; notifyp->dl_notification = notification; notifyp->dl_data = data; return (mp); } mblk_t * ip_dlnotify_alloc2(uint_t notification, uint_t data1, uint_t data2) { dl_notify_ind_t *notifyp; mblk_t *mp; if ((mp = ip_dlpi_alloc(DL_NOTIFY_IND_SIZE, DL_NOTIFY_IND)) == NULL) return (NULL); notifyp = (dl_notify_ind_t *)mp->b_rptr; notifyp->dl_notification = notification; notifyp->dl_data1 = data1; notifyp->dl_data2 = data2; return (mp); } /* * 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); } /* * Called when it is conceptually a ULP that would sent the packet * e.g., port unreachable and protocol unreachable. Check that the packet * would have passed the IPsec global policy before sending the error. * * Send an ICMP error after patching up the packet appropriately. * Uses ip_drop_input and bumps the appropriate MIB. */ void ip_fanout_send_icmp_v4(mblk_t *mp, uint_t icmp_type, uint_t icmp_code, ip_recv_attr_t *ira) { ipha_t *ipha; boolean_t secure; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; netstack_t *ns = ipst->ips_netstack; ipsec_stack_t *ipss = ns->netstack_ipsec; secure = ira->ira_flags & IRAF_IPSEC_SECURE; /* * 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 || ipss->ipsec_inbound_v4_policy_present) { mp = ipsec_check_global_policy(mp, NULL, ipha, NULL, ira, ns); if (mp == NULL) return; } /* We never send errors for protocols that we do implement */ if (ira->ira_protocol == IPPROTO_ICMP || ira->ira_protocol == IPPROTO_IGMP) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ip_fanout_send_icmp_v4", mp, ill); freemsg(mp); return; } /* * 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: switch (icmp_code) { case ICMP_PROTOCOL_UNREACHABLE: BUMP_MIB(ill->ill_ip_mib, ipIfStatsInUnknownProtos); ip_drop_input("ipIfStatsInUnknownProtos", mp, ill); break; case ICMP_PORT_UNREACHABLE: BUMP_MIB(ill->ill_ip_mib, udpIfStatsNoPorts); ip_drop_input("ipIfStatsNoPorts", mp, ill); break; } icmp_unreachable(mp, icmp_code, ira); break; default: #ifdef DEBUG panic("ip_fanout_send_icmp_v4: wrong type"); /*NOTREACHED*/ #else freemsg(mp); break; #endif } } /* * 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(mblk_t *mp, ip_recv_attr_t *ira) { ipha_t *ipha; ipha = (ipha_t *)mp->b_rptr; if (ira->ira_flags & IRAF_IS_IPV4) { ASSERT(IPH_HDR_VERSION(ipha) == IP_VERSION); ip_fanout_send_icmp_v4(mp, ICMP_DEST_UNREACHABLE, ICMP_PROTOCOL_UNREACHABLE, ira); } else { ASSERT(IPH_HDR_VERSION(ipha) == IPV6_VERSION); ip_fanout_send_icmp_v6(mp, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER, ira); } } /* * Deliver a rawip packet to the given conn, possibly applying ipsec policy. * Handles IPv4 and IPv6. * We are responsible for disposing of mp, such as by freemsg() or putnext() * Caller is responsible for dropping references to the conn. */ void ip_fanout_proto_conn(conn_t *connp, mblk_t *mp, ipha_t *ipha, ip6_t *ip6h, ip_recv_attr_t *ira) { ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec; boolean_t secure; uint_t protocol = ira->ira_protocol; iaflags_t iraflags = ira->ira_flags; queue_t *rq; secure = iraflags & IRAF_IPSEC_SECURE; rq = connp->conn_rq; if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld : !canputnext(rq)) { switch (protocol) { case IPPROTO_ICMPV6: BUMP_MIB(ill->ill_icmp6_mib, ipv6IfIcmpInOverflows); break; case IPPROTO_ICMP: BUMP_MIB(&ipst->ips_icmp_mib, icmpInOverflows); break; default: BUMP_MIB(ill->ill_ip_mib, rawipIfStatsInOverflows); break; } freemsg(mp); return; } ASSERT(!(IPCL_IS_IPTUN(connp))); if (((iraflags & IRAF_IS_IPV4) ? CONN_INBOUND_POLICY_PRESENT(connp, ipss) : CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) || secure) { mp = ipsec_check_inbound_policy(mp, connp, ipha, ip6h, ira); if (mp == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); /* Note that mp is NULL */ ip_drop_input("ipIfStatsInDiscards", mp, ill); return; } } if (iraflags & IRAF_ICMP_ERROR) { (connp->conn_recvicmp)(connp, mp, NULL, ira); } else { ill_t *rill = ira->ira_rill; BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers); ira->ira_ill = ira->ira_rill = NULL; /* Send it upstream */ (connp->conn_recv)(connp, mp, NULL, ira); ira->ira_ill = ill; ira->ira_rill = rill; } } /* * 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. * * Zones notes: * Earlier in ip_input on a system with multiple shared-IP zones we * duplicate the multicast and broadcast packets and send them up * with each explicit zoneid that exists on that ill. * This means that here we can match the zoneid with SO_ALLZONES being special. */ void ip_fanout_proto_v4(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira) { mblk_t *mp1; ipaddr_t laddr; conn_t *connp, *first_connp, *next_connp; connf_t *connfp; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; laddr = ipha->ipha_dst; connfp = &ipst->ips_ipcl_proto_fanout_v4[ira->ira_protocol]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; for (connp = connfp->connf_head; connp != NULL; connp = connp->conn_next) { /* Note: IPCL_PROTO_MATCH includes conn_wantpacket */ if (IPCL_PROTO_MATCH(connp, ira, ipha) && (!(ira->ira_flags & IRAF_SYSTEM_LABELED) || tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) { break; } } if (connp == NULL) { /* * No one bound to these addresses. Is * there a client that wants all * unclaimed datagrams? */ mutex_exit(&connfp->connf_lock); ip_fanout_send_icmp_v4(mp, ICMP_DEST_UNREACHABLE, ICMP_PROTOCOL_UNREACHABLE, ira); return; } ASSERT(IPCL_IS_NONSTR(connp) || connp->conn_rq != NULL); CONN_INC_REF(connp); first_connp = connp; connp = connp->conn_next; for (;;) { while (connp != NULL) { /* Note: IPCL_PROTO_MATCH includes conn_wantpacket */ if (IPCL_PROTO_MATCH(connp, ira, ipha) && (!(ira->ira_flags & IRAF_SYSTEM_LABELED) || tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) break; connp = connp->conn_next; } if (connp == NULL) { /* No more interested clients */ connp = first_connp; break; } if (((mp1 = dupmsg(mp)) == NULL) && ((mp1 = copymsg(mp)) == NULL)) { /* Memory allocation failed */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); connp = first_connp; break; } CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); ip_fanout_proto_conn(connp, mp1, (ipha_t *)mp1->b_rptr, NULL, ira); 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_proto_conn(connp, mp, ipha, NULL, ira); CONN_DEC_REF(connp); } /* * If we have a IPsec NAT-Traversal packet, strip the zero-SPI or * pass it along to ESP if the SPI is non-zero. Returns the mblk if the mblk * is not consumed. * * One of three things can happen, all of which affect the passed-in mblk: * * 1.) The packet is stock UDP and gets its zero-SPI stripped. Return mblk.. * * 2.) The packet is ESP-in-UDP, gets transformed into an equivalent * ESP packet, and is passed along to ESP for consumption. Return NULL. * * 3.) The packet is an ESP-in-UDP Keepalive. Drop it and return NULL. */ mblk_t * zero_spi_check(mblk_t *mp, ip_recv_attr_t *ira) { int shift, plen, iph_len; ipha_t *ipha; udpha_t *udpha; uint32_t *spi; uint32_t esp_ports; uint8_t *orptr; ip_stack_t *ipst = ira->ira_ill->ill_ipst; ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec; ipha = (ipha_t *)mp->b_rptr; iph_len = ira->ira_ip_hdr_length; plen = ira->ira_pktlen; if (plen - iph_len - sizeof (udpha_t) < sizeof (uint32_t)) { /* * Most likely a keepalive for the benefit of an intervening * NAT. These aren't for us, per se, so drop it. * * RFC 3947/8 doesn't say for sure what to do for 2-3 * byte packets (keepalives are 1-byte), but we'll drop them * also. */ ip_drop_packet(mp, B_TRUE, ira->ira_ill, DROPPER(ipss, ipds_esp_nat_t_ka), &ipss->ipsec_dropper); return (NULL); } if (MBLKL(mp) < iph_len + sizeof (udpha_t) + sizeof (*spi)) { /* might as well pull it all up - it might be ESP. */ if (!pullupmsg(mp, -1)) { ip_drop_packet(mp, B_TRUE, ira->ira_ill, DROPPER(ipss, ipds_esp_nomem), &ipss->ipsec_dropper); return (NULL); } ipha = (ipha_t *)mp->b_rptr; } spi = (uint32_t *)(mp->b_rptr + iph_len + sizeof (udpha_t)); if (*spi == 0) { /* UDP packet - remove 0-spi. */ shift = sizeof (uint32_t); } else { /* ESP-in-UDP packet - reduce to ESP. */ ipha->ipha_protocol = IPPROTO_ESP; shift = sizeof (udpha_t); } /* Fix IP header */ ira->ira_pktlen = (plen - shift); ipha->ipha_length = htons(ira->ira_pktlen); ipha->ipha_hdr_checksum = 0; orptr = mp->b_rptr; mp->b_rptr += shift; udpha = (udpha_t *)(orptr + iph_len); if (*spi == 0) { ASSERT((uint8_t *)ipha == orptr); udpha->uha_length = htons(plen - shift - iph_len); iph_len += sizeof (udpha_t); /* For the call to ovbcopy(). */ esp_ports = 0; } else { esp_ports = *((uint32_t *)udpha); ASSERT(esp_ports != 0); } ovbcopy(orptr, orptr + shift, iph_len); if (esp_ports != 0) /* Punt up for ESP processing. */ { ipha = (ipha_t *)(orptr + shift); ira->ira_flags |= IRAF_ESP_UDP_PORTS; ira->ira_esp_udp_ports = esp_ports; ip_fanout_v4(mp, ipha, ira); return (NULL); } return (mp); } /* * Deliver a udp packet to the given conn, possibly applying ipsec policy. * Handles IPv4 and IPv6. * We are responsible for disposing of mp, such as by freemsg() or putnext() * Caller is responsible for dropping references to the conn. */ void ip_fanout_udp_conn(conn_t *connp, mblk_t *mp, ipha_t *ipha, ip6_t *ip6h, ip_recv_attr_t *ira) { ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec; boolean_t secure; iaflags_t iraflags = ira->ira_flags; secure = iraflags & IRAF_IPSEC_SECURE; if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld : !canputnext(connp->conn_rq)) { BUMP_MIB(ill->ill_ip_mib, udpIfStatsInOverflows); freemsg(mp); return; } if (((iraflags & IRAF_IS_IPV4) ? CONN_INBOUND_POLICY_PRESENT(connp, ipss) : CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) || secure) { mp = ipsec_check_inbound_policy(mp, connp, ipha, ip6h, ira); if (mp == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); /* Note that mp is NULL */ ip_drop_input("ipIfStatsInDiscards", mp, ill); return; } } /* * Since this code is not used for UDP unicast we don't need a NAT_T * check. Only ip_fanout_v4 has that check. */ if (ira->ira_flags & IRAF_ICMP_ERROR) { (connp->conn_recvicmp)(connp, mp, NULL, ira); } else { ill_t *rill = ira->ira_rill; BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers); ira->ira_ill = ira->ira_rill = NULL; /* Send it upstream */ (connp->conn_recv)(connp, mp, NULL, ira); ira->ira_ill = ill; ira->ira_rill = rill; } } /* * Fanout for UDP packets that are multicast or broadcast, and ICMP errors. * (Unicast fanout is handled in ip_input_v4.) * * If SO_REUSEADDR is set all multicast and broadcast packets * will be delivered to all conns bound to the same port. * * If there is at least one matching AF_INET receiver, then we will * ignore any AF_INET6 receivers. * 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. * * Zones notes: * Earlier in ip_input on a system with multiple shared-IP zones we * duplicate the multicast and broadcast packets and send them up * with each explicit zoneid that exists on that ill. * This means that here we can match the zoneid with SO_ALLZONES being special. */ void ip_fanout_udp_multi_v4(mblk_t *mp, ipha_t *ipha, uint16_t lport, uint16_t fport, ip_recv_attr_t *ira) { ipaddr_t laddr; in6_addr_t v6faddr; conn_t *connp; connf_t *connfp; ipaddr_t faddr; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; ASSERT(ira->ira_flags & (IRAF_MULTIBROADCAST|IRAF_ICMP_ERROR)); laddr = ipha->ipha_dst; faddr = ipha->ipha_src; connfp = &ipst->ips_ipcl_udp_fanout[IPCL_UDP_HASH(lport, ipst)]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; /* * 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, lport, laddr, fport, faddr)) && conn_wantpacket(connp, ira, ipha) && (!(ira->ira_flags & IRAF_SYSTEM_LABELED) || tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) break; connp = connp->conn_next; } if (connp == NULL) goto notfound; CONN_INC_REF(connp); if (connp->conn_reuseaddr) { conn_t *first_connp = connp; conn_t *next_connp; mblk_t *mp1; connp = connp->conn_next; for (;;) { while (connp != NULL) { if (IPCL_UDP_MATCH(connp, lport, laddr, fport, faddr) && conn_wantpacket(connp, ira, ipha) && (!(ira->ira_flags & IRAF_SYSTEM_LABELED) || tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) break; connp = connp->conn_next; } if (connp == NULL) { /* No more interested clients */ connp = first_connp; break; } if (((mp1 = dupmsg(mp)) == NULL) && ((mp1 = copymsg(mp)) == NULL)) { /* Memory allocation failed */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); connp = first_connp; break; } CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); IP_STAT(ipst, ip_udp_fanmb); ip_fanout_udp_conn(connp, mp1, (ipha_t *)mp1->b_rptr, NULL, ira); 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_STAT(ipst, ip_udp_fanmb); ip_fanout_udp_conn(connp, mp, ipha, NULL, ira); CONN_DEC_REF(connp); return; notfound: mutex_exit(&connfp->connf_lock); /* * IPv6 endpoints bound to 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, &v6faddr); connfp = &ipst->ips_ipcl_udp_fanout[IPCL_UDP_HASH(lport, ipst)]; mutex_enter(&connfp->connf_lock); connp = connfp->connf_head; /* * 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. */ while (connp != NULL) { if (IPCL_UDP_MATCH_V6(connp, lport, ipv6_all_zeros, fport, v6faddr) && conn_wantpacket(connp, ira, ipha) && (!(ira->ira_flags & IRAF_SYSTEM_LABELED) || tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) break; connp = connp->conn_next; } if (connp == NULL) { /* * No one bound to this port. Is * there a client that wants all * unclaimed datagrams? */ mutex_exit(&connfp->connf_lock); if (ipst->ips_ipcl_proto_fanout_v4[IPPROTO_UDP].connf_head != NULL) { ASSERT(ira->ira_protocol == IPPROTO_UDP); ip_fanout_proto_v4(mp, ipha, ira); } 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(ill->ill_ip_mib, udpIfStatsNoPorts); freemsg(mp); } return; } ASSERT(IPCL_IS_NONSTR(connp) || connp->conn_rq != NULL); /* * 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. */ if (connp->conn_reuseaddr) { conn_t *first_connp = connp; conn_t *next_connp; mblk_t *mp1; CONN_INC_REF(connp); connp = connp->conn_next; for (;;) { while (connp != NULL) { if (IPCL_UDP_MATCH_V6(connp, lport, ipv6_all_zeros, fport, v6faddr) && conn_wantpacket(connp, ira, ipha) && (!(ira->ira_flags & IRAF_SYSTEM_LABELED) || tsol_receive_local(mp, &laddr, IPV4_VERSION, ira, connp))) break; connp = connp->conn_next; } if (connp == NULL) { /* No more interested clients */ connp = first_connp; break; } if (((mp1 = dupmsg(mp)) == NULL) && ((mp1 = copymsg(mp)) == NULL)) { /* Memory allocation failed */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); connp = first_connp; break; } CONN_INC_REF(connp); mutex_exit(&connfp->connf_lock); IP_STAT(ipst, ip_udp_fanmb); ip_fanout_udp_conn(connp, mp1, (ipha_t *)mp1->b_rptr, NULL, ira); 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_STAT(ipst, ip_udp_fanmb); ip_fanout_udp_conn(connp, mp, ipha, NULL, ira); CONN_DEC_REF(connp); } /* * Split an incoming packet's IPv4 options into the label and the other options. * If 'allocate' is set it does memory allocation for the ip_pkt_t, including * clearing out any leftover label or options. * Otherwise it just makes ipp point into the packet. * * Returns zero if ok; ENOMEM if the buffer couldn't be allocated. */ int ip_find_hdr_v4(ipha_t *ipha, ip_pkt_t *ipp, boolean_t allocate) { uchar_t *opt; uint32_t totallen; uint32_t optval; uint32_t optlen; ipp->ipp_fields |= IPPF_HOPLIMIT | IPPF_TCLASS | IPPF_ADDR; ipp->ipp_hoplimit = ipha->ipha_ttl; ipp->ipp_type_of_service = ipha->ipha_type_of_service; IN6_IPADDR_TO_V4MAPPED(ipha->ipha_dst, &ipp->ipp_addr); /* * Get length (in 4 byte octets) of IP header options. */ totallen = ipha->ipha_version_and_hdr_length - (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS); if (totallen == 0) { if (!allocate) return (0); /* Clear out anything from a previous packet */ if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) { kmem_free(ipp->ipp_ipv4_options, ipp->ipp_ipv4_options_len); ipp->ipp_ipv4_options = NULL; ipp->ipp_ipv4_options_len = 0; ipp->ipp_fields &= ~IPPF_IPV4_OPTIONS; } if (ipp->ipp_fields & IPPF_LABEL_V4) { kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4); ipp->ipp_label_v4 = NULL; ipp->ipp_label_len_v4 = 0; ipp->ipp_fields &= ~IPPF_LABEL_V4; } return (0); } totallen <<= 2; opt = (uchar_t *)&ipha[1]; if (!is_system_labeled()) { copyall: if (!allocate) { if (totallen != 0) { ipp->ipp_ipv4_options = opt; ipp->ipp_ipv4_options_len = totallen; ipp->ipp_fields |= IPPF_IPV4_OPTIONS; } return (0); } /* Just copy all of options */ if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) { if (totallen == ipp->ipp_ipv4_options_len) { bcopy(opt, ipp->ipp_ipv4_options, totallen); return (0); } kmem_free(ipp->ipp_ipv4_options, ipp->ipp_ipv4_options_len); ipp->ipp_ipv4_options = NULL; ipp->ipp_ipv4_options_len = 0; ipp->ipp_fields &= ~IPPF_IPV4_OPTIONS; } if (totallen == 0) return (0); ipp->ipp_ipv4_options = kmem_alloc(totallen, KM_NOSLEEP); if (ipp->ipp_ipv4_options == NULL) return (ENOMEM); ipp->ipp_ipv4_options_len = totallen; ipp->ipp_fields |= IPPF_IPV4_OPTIONS; bcopy(opt, ipp->ipp_ipv4_options, totallen); return (0); } if (allocate && (ipp->ipp_fields & IPPF_LABEL_V4)) { kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4); ipp->ipp_label_v4 = NULL; ipp->ipp_label_len_v4 = 0; ipp->ipp_fields &= ~IPPF_LABEL_V4; } /* * Search for CIPSO option. * We assume CIPSO is first in options if it is present. * If it isn't, then ipp_opt_ipv4_options will not include the options * prior to the CIPSO option. */ while (totallen != 0) { switch (optval = opt[IPOPT_OPTVAL]) { case IPOPT_EOL: return (0); case IPOPT_NOP: optlen = 1; break; default: if (totallen <= IPOPT_OLEN) return (EINVAL); optlen = opt[IPOPT_OLEN]; if (optlen < 2) return (EINVAL); } if (optlen > totallen) return (EINVAL); switch (optval) { case IPOPT_COMSEC: if (!allocate) { ipp->ipp_label_v4 = opt; ipp->ipp_label_len_v4 = optlen; ipp->ipp_fields |= IPPF_LABEL_V4; } else { ipp->ipp_label_v4 = kmem_alloc(optlen, KM_NOSLEEP); if (ipp->ipp_label_v4 == NULL) return (ENOMEM); ipp->ipp_label_len_v4 = optlen; ipp->ipp_fields |= IPPF_LABEL_V4; bcopy(opt, ipp->ipp_label_v4, optlen); } totallen -= optlen; opt += optlen; /* Skip padding bytes until we get to a multiple of 4 */ while ((totallen & 3) != 0 && opt[0] == IPOPT_NOP) { totallen--; opt++; } /* Remaining as ipp_ipv4_options */ goto copyall; } totallen -= optlen; opt += optlen; } /* No CIPSO found; return everything as ipp_ipv4_options */ totallen = ipha->ipha_version_and_hdr_length - (uint8_t)((IP_VERSION << 4) + IP_SIMPLE_HDR_LENGTH_IN_WORDS); totallen <<= 2; opt = (uchar_t *)&ipha[1]; goto copyall; } /* * Efficient versions of lookup for an IRE when we only * match the address. * For RTF_REJECT or BLACKHOLE we return IRE_NOROUTE. * Does not handle multicast addresses. */ uint_t ip_type_v4(ipaddr_t addr, ip_stack_t *ipst) { ire_t *ire; uint_t result; ire = ire_ftable_lookup_simple_v4(addr, 0, ipst, NULL); ASSERT(ire != NULL); if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) result = IRE_NOROUTE; else result = ire->ire_type; ire_refrele(ire); return (result); } /* * Efficient versions of lookup for an IRE when we only * match the address. * For RTF_REJECT or BLACKHOLE we return IRE_NOROUTE. * Does not handle multicast addresses. */ uint_t ip_type_v6(const in6_addr_t *addr, ip_stack_t *ipst) { ire_t *ire; uint_t result; ire = ire_ftable_lookup_simple_v6(addr, 0, ipst, NULL); ASSERT(ire != NULL); if (ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) result = IRE_NOROUTE; else result = ire->ire_type; ire_refrele(ire); return (result); } /* * Nobody should be sending * packets up this stream */ static void ip_lrput(queue_t *q, mblk_t *mp) { 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; } 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_output_options. Return the final * destination (either ipha_dst or the last entry in a source route.) */ ipaddr_t ip_massage_options(ipha_t *ipha, netstack_t *ns) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; int i; ip_stack_t *ipst = ns->netstack_ip; 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? */ if (ip_type_v4(dst, ipst) == IRE_LOCAL) { 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); } /* * 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); } /* We assume Class E default netmask to be 32 */ if (CLASSE(addr)) return (0xffffffffU); 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); /* Otherwise return no mask */ return ((ipaddr_t)0); } /* 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"); } static int ip_wait_for_info_ack(ill_t *ill) { int err; 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); return (EINTR); } } mutex_exit(&ill->ill_lock); /* * ip_rput_other could have set an error in ill_error on * receipt of M_ERROR. */ return (ill->ill_error); } /* * 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. */ static int ip_modopen(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { ill_t *ill; int err; zoneid_t zoneid; netstack_t *ns; ip_stack_t *ipst; /* * Prevent unprivileged processes from pushing IP so that * they can't send raw IP. */ if (secpolicy_net_rawaccess(credp) != 0) return (EPERM); ns = netstack_find_by_cred(credp); ASSERT(ns != NULL); ipst = ns->netstack_ip; ASSERT(ipst != NULL); /* * For exclusive stacks we set the zoneid to zero * to make IP operate as if in the global zone. */ if (ipst->ips_netstack->netstack_stackid != GLOBAL_NETSTACKID) zoneid = GLOBAL_ZONEID; else zoneid = crgetzoneid(credp); ill = (ill_t *)mi_open_alloc_sleep(sizeof (ill_t)); q->q_ptr = WR(q)->q_ptr = ill; ill->ill_ipst = ipst; ill->ill_zoneid = zoneid; /* * 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); netstack_rele(ipst->ips_netstack); q->q_ptr = NULL; WR(q)->q_ptr = NULL; return (err); } /* * Wait for the DL_INFO_ACK if a DL_INFO_REQ was sent. * * ill_init initializes the ipsq marking this thread as * writer */ ipsq_exit(ill->ill_phyint->phyint_ipsq); err = ip_wait_for_info_ack(ill); if (err == 0) ill->ill_credp = credp; else goto fail; crhold(credp); mutex_enter(&ipst->ips_ip_mi_lock); err = mi_open_link(&ipst->ips_ip_g_head, (IDP)q->q_ptr, devp, flag, sflag, credp); mutex_exit(&ipst->ips_ip_mi_lock); fail: if (err) { (void) ip_close(q, 0); return (err); } return (0); } /* For /dev/ip aka AF_INET open */ int ip_openv4(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { return (ip_open(q, devp, flag, sflag, credp, B_FALSE)); } /* For /dev/ip6 aka AF_INET6 open */ int ip_openv6(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { return (ip_open(q, devp, flag, sflag, credp, B_TRUE)); } /* IP open routine. */ int ip_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp, boolean_t isv6) { conn_t *connp; major_t maj; zoneid_t zoneid; netstack_t *ns; ip_stack_t *ipst; /* 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)); } if ((flag & ~(FKLYR)) == IP_HELPER_STR) { /* * Non streams based socket looking for a stream * to access IP */ return (ip_helper_stream_setup(q, devp, flag, sflag, credp, isv6)); } ns = netstack_find_by_cred(credp); ASSERT(ns != NULL); ipst = ns->netstack_ip; ASSERT(ipst != NULL); /* * For exclusive stacks we set the zoneid to zero * to make IP operate as if in the global zone. */ if (ipst->ips_netstack->netstack_stackid != GLOBAL_NETSTACKID) zoneid = GLOBAL_ZONEID; else zoneid = crgetzoneid(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, ipst->ips_netstack); /* * ipcl_conn_create did a netstack_hold. Undo the hold that was * done by netstack_find_by_cred() */ netstack_rele(ipst->ips_netstack); connp->conn_ixa->ixa_flags |= IXAF_MULTICAST_LOOP | IXAF_SET_ULP_CKSUM; /* conn_allzones can not be set this early, hence no IPCL_ZONEID */ connp->conn_ixa->ixa_zoneid = zoneid; connp->conn_zoneid = zoneid; connp->conn_rq = q; q->q_ptr = WR(q)->q_ptr = connp; /* Minor tells us which /dev entry was opened */ if (isv6) { connp->conn_family = AF_INET6; connp->conn_ipversion = IPV6_VERSION; connp->conn_ixa->ixa_flags &= ~IXAF_IS_IPV4; connp->conn_ixa->ixa_src_preferences = IPV6_PREFER_SRC_DEFAULT; } else { connp->conn_family = AF_INET; connp->conn_ipversion = IPV4_VERSION; connp->conn_ixa->ixa_flags |= IXAF_IS_IPV4; } if ((ip_minor_arena_la != NULL) && (flag & SO_SOCKSTR) && ((connp->conn_dev = inet_minor_alloc(ip_minor_arena_la)) != 0)) { connp->conn_minor_arena = ip_minor_arena_la; } else { /* * Either minor numbers in the large arena were exhausted * or a non socket application is doing the open. * Try to allocate from the small arena. */ if ((connp->conn_dev = inet_minor_alloc(ip_minor_arena_sa)) == 0) { /* CONN_DEC_REF takes care of netstack_rele() */ q->q_ptr = WR(q)->q_ptr = NULL; CONN_DEC_REF(connp); return (EBUSY); } connp->conn_minor_arena = ip_minor_arena_sa; } 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; connp->conn_cpid = curproc->p_pid; /* Cache things in ixa without an extra refhold */ ASSERT(!(connp->conn_ixa->ixa_free_flags & IXA_FREE_CRED)); connp->conn_ixa->ixa_cred = connp->conn_cred; connp->conn_ixa->ixa_cpid = connp->conn_cpid; if (is_system_labeled()) connp->conn_ixa->ixa_tsl = crgetlabel(connp->conn_cred); /* * Handle IP_IOC_RTS_REQUEST and other ioctls which use conn_recv */ connp->conn_recv = ip_conn_input; connp->conn_recvicmp = ip_conn_input_icmp; 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_mode = CONN_MAC_AWARE; connp->conn_zone_is_global = (crgetzoneid(credp) == GLOBAL_ZONEID); connp->conn_rq = q; connp->conn_wq = WR(q); /* Non-zero default values */ connp->conn_ixa->ixa_flags |= IXAF_MULTICAST_LOOP; /* * Make the conn globally visible to walkers */ ASSERT(connp->conn_ref == 1); mutex_enter(&connp->conn_lock); connp->conn_state_flags &= ~CONN_INCIPIENT; mutex_exit(&connp->conn_lock); qprocson(q); return (0); } /* * 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_act_t *actp = NULL; uint_t nact; ipsec_policy_head_t *ph; boolean_t is_pol_reset, is_pol_inserted = B_FALSE; int error = 0; netstack_t *ns = connp->conn_netstack; ip_stack_t *ipst = ns->netstack_ip; ipsec_stack_t *ipss = ns->netstack_ipsec; #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; /* Don't allow setting self-encap without one or more of AH/ESP. */ if (se_req != 0 && esp_req == 0 && ah_req == 0) return (EINVAL); /* * 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(&ipss->ipsec_loader_lock); if (ipss->ipsec_loader_state != IPSEC_LOADER_SUCCEEDED) { mutex_exit(&ipss->ipsec_loader_lock); return (EPROTONOSUPPORT); } mutex_exit(&ipss->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_ip_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); } } ASSERT(MUTEX_HELD(&connp->conn_lock)); /* * If we have already cached policies in conn_connect(), don't * let them change now. We cache policies for connections * whose src,dst [addr, port] is known. */ if (connp->conn_policy_cached) { 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, ipst->ips_netstack); connp->conn_policy = NULL; } connp->conn_in_enforce_policy = B_FALSE; connp->conn_out_enforce_policy = B_FALSE; return (0); } ph = connp->conn_policy = ipsec_polhead_split(connp->conn_policy, ipst->ips_netstack); if (ph == NULL) goto enomem; ipsec_actvec_from_req(req, &actp, &nact, ipst->ips_netstack); if (actp == NULL) goto enomem; /* * Always insert IPv4 policy entries, since they can also apply to * ipv6 sockets being used in ipv4-compat mode. */ if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V4, IPSEC_TYPE_INBOUND, ns)) goto enomem; is_pol_inserted = B_TRUE; if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V4, IPSEC_TYPE_OUTBOUND, ns)) goto enomem; /* * We're looking at a v6 socket, also insert the v6-specific * entries. */ if (connp->conn_family == AF_INET6) { if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V6, IPSEC_TYPE_INBOUND, ns)) goto enomem; if (!ipsec_polhead_insert(ph, actp, nact, IPSEC_AF_V6, IPSEC_TYPE_OUTBOUND, ns)) goto enomem; } ipsec_actvec_free(actp, nact); /* * 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 ip_set_destination * marks the ip_xmit_attr_t appropriatly. This is needed so that * for connections that we don't cache policy in at connect time, * if global policy matches in ip_output_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; } return (error); #undef REQ_MASK /* * Common memory-allocation-failure exit path. */ enomem: if (actp != NULL) ipsec_actvec_free(actp, nact); if (is_pol_inserted) ipsec_polhead_flush(ph, ns); return (ENOMEM); } /* * Set socket options for joining and leaving multicast groups. * Common to IPv4 and IPv6; inet6 indicates the type of socket. * The caller has already check that the option name is consistent with * the address family of the socket. */ int ip_opt_set_multicast_group(conn_t *connp, t_scalar_t name, uchar_t *invalp, boolean_t inet6, boolean_t checkonly) { int *i1 = (int *)invalp; int error = 0; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; struct ip_mreq *v4_mreqp; struct ipv6_mreq *v6_mreqp; struct group_req *greqp; ire_t *ire; boolean_t done = B_FALSE; ipaddr_t ifaddr; in6_addr_t v6group; uint_t ifindex; boolean_t mcast_opt = B_TRUE; mcast_record_t fmode; int (*optfn)(conn_t *, boolean_t, const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *); switch (name) { case IP_ADD_MEMBERSHIP: case IPV6_JOIN_GROUP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_JOIN_GROUP: fmode = MODE_IS_EXCLUDE; optfn = ip_opt_add_group; break; case IP_DROP_MEMBERSHIP: case IPV6_LEAVE_GROUP: mcast_opt = B_FALSE; /* FALLTHRU */ case MCAST_LEAVE_GROUP: fmode = MODE_IS_INCLUDE; optfn = ip_opt_delete_group; break; default: ASSERT(0); } 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, &v6group); } else { if (!inet6) return (EINVAL); /* Not on INET socket */ sin6 = (struct sockaddr_in6 *)&(greqp->gr_group); v6group = sin6->sin6_addr; } ifaddr = INADDR_ANY; ifindex = greqp->gr_interface; } else if (inet6) { v6_mreqp = (struct ipv6_mreq *)i1; v6group = v6_mreqp->ipv6mr_multiaddr; ifaddr = INADDR_ANY; ifindex = v6_mreqp->ipv6mr_interface; } else { v4_mreqp = (struct ip_mreq *)i1; IN6_INADDR_TO_V4MAPPED(&v4_mreqp->imr_multiaddr, &v6group); ifaddr = (ipaddr_t)v4_mreqp->imr_interface.s_addr; ifindex = 0; } /* * 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. */ if (IN6_IS_ADDR_V4MAPPED(&v6group)) { ipaddr_t group; IN6_V4MAPPED_TO_IPADDR(&v6group, group); ire = ire_ftable_lookup_v4(group, IP_HOST_MASK, 0, IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL); } else { ire = ire_ftable_lookup_v6(&v6group, &ipv6_all_ones, 0, IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL); } if (ire != NULL) { if (ire->ire_flags & RTF_MULTIRT) { error = ip_multirt_apply_membership(optfn, ire, connp, checkonly, &v6group, fmode, &ipv6_all_zeros); done = B_TRUE; } ire_refrele(ire); } if (!done) { error = optfn(connp, checkonly, &v6group, ifaddr, ifindex, fmode, &ipv6_all_zeros); } return (error); } /* * Set socket options for joining and leaving multicast groups * for specific sources. * Common to IPv4 and IPv6; inet6 indicates the type of socket. * The caller has already check that the option name is consistent with * the address family of the socket. */ int ip_opt_set_multicast_sources(conn_t *connp, t_scalar_t name, uchar_t *invalp, boolean_t inet6, boolean_t checkonly) { int *i1 = (int *)invalp; int error = 0; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; struct ip_mreq_source *imreqp; struct group_source_req *gsreqp; in6_addr_t v6group, v6src; uint32_t ifindex; ipaddr_t ifaddr; boolean_t mcast_opt = B_TRUE; mcast_record_t fmode; ire_t *ire; boolean_t done = B_FALSE; int (*optfn)(conn_t *, boolean_t, const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_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; default: ASSERT(0); } if (mcast_opt) { 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, &v6group); s = (struct sockaddr_in *)&gsreqp->gsr_source; IN6_INADDR_TO_V4MAPPED(&s->sin_addr, &v6src); } else { struct sockaddr_in6 *s6; if (!inet6) return (EINVAL); /* Not on INET socket */ s6 = (struct sockaddr_in6 *)&gsreqp->gsr_group; v6group = s6->sin6_addr; s6 = (struct sockaddr_in6 *)&gsreqp->gsr_source; v6src = s6->sin6_addr; } ifaddr = INADDR_ANY; } else { imreqp = (struct ip_mreq_source *)i1; IN6_INADDR_TO_V4MAPPED(&imreqp->imr_multiaddr, &v6group); IN6_INADDR_TO_V4MAPPED(&imreqp->imr_sourceaddr, &v6src); ifaddr = (ipaddr_t)imreqp->imr_interface.s_addr; ifindex = 0; } /* * Handle src being mapped INADDR_ANY by changing it to unspecified. */ if (IN6_IS_ADDR_V4MAPPED_ANY(&v6src)) v6src = ipv6_all_zeros; /* * In the multirouting case, we need to replicate * the request as noted in the mcast cases above. */ if (IN6_IS_ADDR_V4MAPPED(&v6group)) { ipaddr_t group; IN6_V4MAPPED_TO_IPADDR(&v6group, group); ire = ire_ftable_lookup_v4(group, IP_HOST_MASK, 0, IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL); } else { ire = ire_ftable_lookup_v6(&v6group, &ipv6_all_ones, 0, IRE_HOST | IRE_INTERFACE, NULL, ALL_ZONES, NULL, MATCH_IRE_MASK | MATCH_IRE_TYPE, 0, ipst, NULL); } if (ire != NULL) { if (ire->ire_flags & RTF_MULTIRT) { error = ip_multirt_apply_membership(optfn, ire, connp, checkonly, &v6group, fmode, &v6src); done = B_TRUE; } ire_refrele(ire); } if (!done) { error = optfn(connp, checkonly, &v6group, ifaddr, ifindex, fmode, &v6src); } return (error); } /* * Given a destination address and a pointer to where to put the information * this routine fills in the mtuinfo. * The socket must be connected. * For sctp conn_faddr is the primary address. */ int ip_fill_mtuinfo(conn_t *connp, ip_xmit_attr_t *ixa, struct ip6_mtuinfo *mtuinfo) { uint32_t pmtu = IP_MAXPACKET; uint_t scopeid; if (IN6_IS_ADDR_UNSPECIFIED(&connp->conn_faddr_v6)) return (-1); /* In case we never sent or called ip_set_destination_v4/v6 */ if (ixa->ixa_ire != NULL) pmtu = ip_get_pmtu(ixa); if (ixa->ixa_flags & IXAF_SCOPEID_SET) scopeid = ixa->ixa_scopeid; else scopeid = 0; bzero(mtuinfo, sizeof (*mtuinfo)); mtuinfo->ip6m_addr.sin6_family = AF_INET6; mtuinfo->ip6m_addr.sin6_port = connp->conn_fport; mtuinfo->ip6m_addr.sin6_addr = connp->conn_faddr_v6; mtuinfo->ip6m_addr.sin6_scope_id = scopeid; mtuinfo->ip6m_mtu = pmtu; return (sizeof (struct ip6_mtuinfo)); } /* * When the src multihoming is changed from weak to [strong, preferred] * ip_ire_rebind_walker is called to walk the list of all ire_t entries * and identify routes that were created by user-applications in the * unbound state (i.e., without RTA_IFP), and for which an ire_ill is not * currently defined. These routes are then 'rebound', i.e., their ire_ill * is selected by finding an interface route for the gateway. */ /* ARGSUSED */ void ip_ire_rebind_walker(ire_t *ire, void *notused) { if (!ire->ire_unbound || ire->ire_ill != NULL) return; ire_rebind(ire); ire_delete(ire); } /* * When the src multihoming is changed from [strong, preferred] to weak, * ip_ire_unbind_walker is called to walk the list of all ire_t entries, and * set any entries that were created by user-applications in the unbound state * (i.e., without RTA_IFP) back to having a NULL ire_ill. */ /* ARGSUSED */ void ip_ire_unbind_walker(ire_t *ire, void *notused) { ire_t *new_ire; if (!ire->ire_unbound || ire->ire_ill == NULL) return; if (ire->ire_ipversion == IPV6_VERSION) { new_ire = ire_create_v6(&ire->ire_addr_v6, &ire->ire_mask_v6, &ire->ire_gateway_addr_v6, ire->ire_type, NULL, ire->ire_zoneid, ire->ire_flags, NULL, ire->ire_ipst); } else { new_ire = ire_create((uchar_t *)&ire->ire_addr, (uchar_t *)&ire->ire_mask, (uchar_t *)&ire->ire_gateway_addr, ire->ire_type, NULL, ire->ire_zoneid, ire->ire_flags, NULL, ire->ire_ipst); } if (new_ire == NULL) return; new_ire->ire_unbound = B_TRUE; /* * The bound ire must first be deleted so that we don't return * the existing one on the attempt to add the unbound new_ire. */ ire_delete(ire); new_ire = ire_add(new_ire); if (new_ire != NULL) ire_refrele(new_ire); } /* * When the settings of ip*_strict_src_multihoming tunables are changed, * all cached routes need to be recomputed. This recomputation needs to be * done when going from weaker to stronger modes so that the cached ire * for the connection does not violate the current ip*_strict_src_multihoming * setting. It also needs to be done when going from stronger to weaker modes, * so that we fall back to matching on the longest-matching-route (as opposed * to a shorter match that may have been selected in the strong mode * to satisfy src_multihoming settings). * * The cached ixa_ire entires for all conn_t entries are marked as * "verify" so that they will be recomputed for the next packet. */ void conn_ire_revalidate(conn_t *connp, void *arg) { boolean_t isv6 = (boolean_t)arg; if ((isv6 && connp->conn_ipversion != IPV6_VERSION) || (!isv6 && connp->conn_ipversion != IPV4_VERSION)) return; connp->conn_ixa->ixa_ire_generation = IRE_GENERATION_VERIFY; } /* * 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); BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmPartDups); 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); BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmPartDups); 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); BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmDuplicates); break; } /* * Trim redundant stuff off beginning of new * piece. */ IP_REASS_SET_START(mp, offset); mp->b_rptr += offset - start; BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmPartDups); 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. */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmPartDups); 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); BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmPartDups); 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); } /* * 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 the reassembled packet if reassembly completes. */ mblk_t * ip_input_fragment(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira) { uint32_t frag_offset_flags; 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; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; /* * Drop the fragmented as early as possible, if * we don't have resource(s) to re-assemble. */ if (ipst->ips_ip_reass_queue_bytes == 0) { freemsg(mp); return (NULL); } /* 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 (mp); /* * We utilize hardware computed checksum info only for UDP since * IP fragmentation is a normal occurrence for the protocol. In * addition, checksum offload support for IP fragments carrying * UDP payload is commonly implemented across network adapters. */ ASSERT(ira->ira_rill != NULL); if (proto == IPPROTO_UDP && dohwcksum && ILL_HCKSUM_CAPABLE(ira->ira_rill) && (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 (NULL); } /* 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; } /* Handle vnic loopback of fragments */ if (mp->b_datap->db_ref > 2) msg_len = 0; else msg_len = MBLKSIZE(mp); tail_mp = mp; while (tail_mp->b_cont != NULL) { tail_mp = tail_mp->b_cont; if (tail_mp->b_datap->db_ref <= 2) 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) >= ipst->ips_ip_reass_queue_bytes) { DTRACE_PROBE3(ip_reass_queue_bytes, uint_t, msg_len, uint_t, ill->ill_frag_count, uint_t, ipst->ips_ip_reass_queue_bytes); ill_frag_prune(ill, (ipst->ips_ip_reass_queue_bytes < msg_len) ? 0 : (ipst->ips_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 (NULL); } /* 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 (NULL); } if (ipfb->ipfb_frag_pkts >= MAX_FRAG_PKTS(ipst)) { /* * 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(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); freemsg(mp); reass_done: mutex_exit(&ipfb->ipfb_lock); return (NULL); } BUMP_MIB(ill->ill_ip_mib, ipIfStatsReasmReqds); 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 */ atomic_add_32(&ill->ill_frag_count, ipf->ipf_count); /* 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 */ atomic_add_32(&ill->ill_frag_count, msg_len); 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 */ atomic_add_32(&ill->ill_frag_count, count); } 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(ill->ill_ip_mib, ipIfStatsReasmOKs); 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; atomic_add_32(&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) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); ip_drop_input("Reassembled packet too large", mp, ill); freemsg(mp); return (NULL); } if (DB_REF(mp) > 1) { mblk_t *mp2 = copymsg(mp); if (mp2 == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); freemsg(mp); return (NULL); } freemsg(mp); 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; /* Update the receive attributes */ ira->ira_pktlen = packet_size; ira->ira_ip_hdr_length = IPH_HDR_LENGTH(ipha); /* Reassembly is successful; set checksum information in packet */ DB_CKSUM16(mp) = (uint16_t)sum_val; DB_CKSUMFLAGS(mp) = sum_flags; DB_CKSUMSTART(mp) = ira->ira_ip_hdr_length; return (mp); } /* * Pullup function that should be used for IP input in order to * ensure we do not loose the L2 source address; we need the l2 source * address for IP_RECVSLLA and for ndp_input. * * We return either NULL or b_rptr. */ void * ip_pullup(mblk_t *mp, ssize_t len, ip_recv_attr_t *ira) { ill_t *ill = ira->ira_ill; if (ip_rput_pullups++ == 0) { (void) mi_strlog(ill->ill_rq, 1, SL_ERROR|SL_TRACE, "ip_pullup: %s forced us to " " pullup pkt, hdr len %ld, hdr addr %p", ill->ill_name, len, (void *)mp->b_rptr); } if (!(ira->ira_flags & IRAF_L2SRC_SET)) ip_setl2src(mp, ira, ira->ira_rill); ASSERT(ira->ira_flags & IRAF_L2SRC_SET); if (!pullupmsg(mp, len)) return (NULL); else return (mp->b_rptr); } /* * Make sure ira_l2src has an address. If we don't have one fill with zeros. * When called from the ULP ira_rill will be NULL hence the caller has to * pass in the ill. */ /* ARGSUSED */ void ip_setl2src(mblk_t *mp, ip_recv_attr_t *ira, ill_t *ill) { const uchar_t *addr; int alen; if (ira->ira_flags & IRAF_L2SRC_SET) return; ASSERT(ill != NULL); alen = ill->ill_phys_addr_length; ASSERT(alen <= sizeof (ira->ira_l2src)); if (ira->ira_mhip != NULL && (addr = ira->ira_mhip->mhi_saddr) != NULL) { bcopy(addr, ira->ira_l2src, alen); } else if ((ira->ira_flags & IRAF_L2SRC_LOOPBACK) && (addr = ill->ill_phys_addr) != NULL) { bcopy(addr, ira->ira_l2src, alen); } else { bzero(ira->ira_l2src, alen); } ira->ira_flags |= IRAF_L2SRC_SET; } /* * check ip header length and align it. */ mblk_t * ip_check_and_align_header(mblk_t *mp, uint_t min_size, ip_recv_attr_t *ira) { ill_t *ill = ira->ira_ill; ssize_t len; len = MBLKL(mp); if (!OK_32PTR(mp->b_rptr)) IP_STAT(ill->ill_ipst, ip_notaligned); else IP_STAT(ill->ill_ipst, ip_recv_pullup); /* Guard against bogus device drivers */ if (len < 0) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); ip_drop_input("ipIfStatsInHdrErrors", mp, ill); freemsg(mp); return (NULL); } if (len == 0) { /* GLD sometimes sends up mblk with b_rptr == b_wptr! */ mblk_t *mp1 = mp->b_cont; if (!(ira->ira_flags & IRAF_L2SRC_SET)) ip_setl2src(mp, ira, ira->ira_rill); ASSERT(ira->ira_flags & IRAF_L2SRC_SET); freeb(mp); mp = mp1; if (mp == NULL) return (NULL); if (OK_32PTR(mp->b_rptr) && MBLKL(mp) >= min_size) return (mp); } if (ip_pullup(mp, min_size, ira) == NULL) { if (msgdsize(mp) < min_size) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); ip_drop_input("ipIfStatsInHdrErrors", mp, ill); } else { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); } freemsg(mp); return (NULL); } return (mp); } /* * Common code for IPv4 and IPv6 to check and pullup multi-mblks */ mblk_t * ip_check_length(mblk_t *mp, uchar_t *rptr, ssize_t len, uint_t pkt_len, uint_t min_size, ip_recv_attr_t *ira) { ill_t *ill = ira->ira_ill; /* * Make sure we have data length consistent * with the IP header. */ if (mp->b_cont == NULL) { /* pkt_len is based on ipha_len, not the mblk length */ if (pkt_len < min_size) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); ip_drop_input("ipIfStatsInHdrErrors", mp, ill); freemsg(mp); return (NULL); } if (len < 0) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts); ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill); freemsg(mp); return (NULL); } /* Drop any pad */ mp->b_wptr = rptr + pkt_len; } else if ((len += msgdsize(mp->b_cont)) != 0) { ASSERT(pkt_len >= min_size); if (pkt_len < min_size) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); ip_drop_input("ipIfStatsInHdrErrors", mp, ill); freemsg(mp); return (NULL); } if (len < 0) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInTruncatedPkts); ip_drop_input("ipIfStatsInTruncatedPkts", mp, ill); freemsg(mp); return (NULL); } /* Drop any pad */ (void) adjmsg(mp, -len); /* * adjmsg may have freed an mblk from the chain, hence * invalidate any hw checksum here. This will force IP to * calculate the checksum in sw, but only for this packet. */ DB_CKSUMFLAGS(mp) = 0; IP_STAT(ill->ill_ipst, ip_multimblk); } return (mp); } /* * Check that the IPv4 opt_len is consistent with the packet and pullup * the options. */ mblk_t * ip_check_optlen(mblk_t *mp, ipha_t *ipha, uint_t opt_len, uint_t pkt_len, ip_recv_attr_t *ira) { ill_t *ill = ira->ira_ill; ssize_t len; /* Assume no IPv6 packets arrive over the IPv4 queue */ if (IPH_HDR_VERSION(ipha) != IPV4_VERSION) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); BUMP_MIB(ill->ill_ip_mib, ipIfStatsInWrongIPVersion); ip_drop_input("IPvN packet on IPv4 ill", mp, ill); freemsg(mp); return (NULL); } if (opt_len > (15 - IP_SIMPLE_HDR_LENGTH_IN_WORDS)) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); ip_drop_input("ipIfStatsInHdrErrors", mp, ill); freemsg(mp); return (NULL); } /* * 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 - mp->b_rptr)) { if (len > pkt_len) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInHdrErrors); ip_drop_input("ipIfStatsInHdrErrors", mp, ill); freemsg(mp); return (NULL); } if (ip_pullup(mp, len, ira) == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); freemsg(mp); return (NULL); } } return (mp); } /* * Returns a new ire, or the same ire, or NULL. * If a different IRE is returned, then it is held; the caller * needs to release it. * In no case is there any hold/release on the ire argument. */ ire_t * ip_check_multihome(void *addr, ire_t *ire, ill_t *ill) { ire_t *new_ire; ill_t *ire_ill; uint_t ifindex; ip_stack_t *ipst = ill->ill_ipst; boolean_t strict_check = B_FALSE; /* * IPMP common case: if IRE and ILL are in the same group, there's no * issue (e.g. packet received on an underlying interface matched an * IRE_LOCAL on its associated group interface). */ ASSERT(ire->ire_ill != NULL); if (IS_IN_SAME_ILLGRP(ill, ire->ire_ill)) return (ire); /* * Do another ire lookup here, using the ingress ill, to see if the * interface is in a usesrc group. * As long as the ills belong to the same group, we don't consider * them to be arriving on the wrong interface. Thus, if the switch * is doing inbound load spreading, we won't drop packets when the * ip*_strict_dst_multihoming switch is on. * We also need to check for IPIF_UNNUMBERED point2point interfaces * where the local address may not be unique. In this case we were * at the mercy of the initial ire lookup and the IRE_LOCAL it * actually returned. The new lookup, which is more specific, should * only find the IRE_LOCAL associated with the ingress ill if one * exists. */ if (ire->ire_ipversion == IPV4_VERSION) { if (ipst->ips_ip_strict_dst_multihoming) strict_check = B_TRUE; new_ire = ire_ftable_lookup_v4(*((ipaddr_t *)addr), 0, 0, IRE_LOCAL, ill, ALL_ZONES, NULL, (MATCH_IRE_TYPE|MATCH_IRE_ILL), 0, ipst, NULL); } else { ASSERT(!IN6_IS_ADDR_MULTICAST((in6_addr_t *)addr)); if (ipst->ips_ipv6_strict_dst_multihoming) strict_check = B_TRUE; new_ire = ire_ftable_lookup_v6((in6_addr_t *)addr, NULL, NULL, IRE_LOCAL, ill, ALL_ZONES, NULL, (MATCH_IRE_TYPE|MATCH_IRE_ILL), 0, ipst, NULL); } /* * If the same ire that was returned in ip_input() is found then this * is an indication that usesrc groups are in use. The packet * arrived on a different ill in the group than the one associated with * the destination address. If a different ire was found then the same * IP address must be hosted on multiple ills. This is possible with * unnumbered point2point interfaces. We switch to use this new ire in * order to have accurate interface statistics. */ if (new_ire != NULL) { /* Note: held in one case but not the other? Caller handles */ if (new_ire != ire) return (new_ire); /* Unchanged */ ire_refrele(new_ire); return (ire); } /* * Chase pointers once and store locally. */ ASSERT(ire->ire_ill != NULL); ire_ill = ire->ire_ill; ifindex = ill->ill_usesrc_ifindex; /* * Check if it's a legal address on the 'usesrc' interface. * For IPMP data addresses the IRE_LOCAL is the upper, hence we * can just check phyint_ifindex. */ if (ifindex != 0 && ifindex == ire_ill->ill_phyint->phyint_ifindex) { return (ire); } /* * If the ip*_strict_dst_multihoming switch is on then we can * only accept this packet if the interface is marked as routing. */ if (!(strict_check)) return (ire); if ((ill->ill_flags & ire->ire_ill->ill_flags & ILLF_ROUTER) != 0) { return (ire); } return (NULL); } /* * This function is used to construct a mac_header_info_s from a * DL_UNITDATA_IND message. * The address fields in the mhi structure points into the message, * thus the caller can't use those fields after freeing the message. * * We determine whether the packet received is a non-unicast packet * and in doing so, determine whether or not it is broadcast vs multicast. * For it to be a broadcast packet, we must have the appropriate mblk_t * hanging off the ill_t. If this is either not present or doesn't match * the destination mac address in the DL_UNITDATA_IND, the packet is deemed * to be multicast. Thus NICs that have no broadcast address (or no * capability for one, such as point to point links) cannot return as * the packet being broadcast. */ void ip_dlur_to_mhi(ill_t *ill, mblk_t *mb, struct mac_header_info_s *mhip) { dl_unitdata_ind_t *ind = (dl_unitdata_ind_t *)mb->b_rptr; mblk_t *bmp; uint_t extra_offset; bzero(mhip, sizeof (struct mac_header_info_s)); mhip->mhi_dsttype = MAC_ADDRTYPE_UNICAST; if (ill->ill_sap_length < 0) extra_offset = 0; else extra_offset = ill->ill_sap_length; mhip->mhi_daddr = (uchar_t *)ind + ind->dl_dest_addr_offset + extra_offset; mhip->mhi_saddr = (uchar_t *)ind + ind->dl_src_addr_offset + extra_offset; if (!ind->dl_group_address) return; /* Multicast or broadcast */ mhip->mhi_dsttype = MAC_ADDRTYPE_MULTICAST; if (ind->dl_dest_addr_offset > sizeof (*ind) && ind->dl_dest_addr_offset + ind->dl_dest_addr_length < MBLKL(mb) && (bmp = ill->ill_bcast_mp) != NULL) { dl_unitdata_req_t *dlur; uint8_t *bphys_addr; dlur = (dl_unitdata_req_t *)bmp->b_rptr; bphys_addr = (uchar_t *)dlur + dlur->dl_dest_addr_offset + extra_offset; if (bcmp(mhip->mhi_daddr, bphys_addr, ind->dl_dest_addr_length) == 0) mhip->mhi_dsttype = MAC_ADDRTYPE_BROADCAST; } } /* * This function is used to construct a mac_header_info_s from a * M_DATA fastpath message from a DLPI driver. * The address fields in the mhi structure points into the message, * thus the caller can't use those fields after freeing the message. * * We determine whether the packet received is a non-unicast packet * and in doing so, determine whether or not it is broadcast vs multicast. * For it to be a broadcast packet, we must have the appropriate mblk_t * hanging off the ill_t. If this is either not present or doesn't match * the destination mac address in the DL_UNITDATA_IND, the packet is deemed * to be multicast. Thus NICs that have no broadcast address (or no * capability for one, such as point to point links) cannot return as * the packet being broadcast. */ void ip_mdata_to_mhi(ill_t *ill, mblk_t *mp, struct mac_header_info_s *mhip) { mblk_t *bmp; struct ether_header *pether; bzero(mhip, sizeof (struct mac_header_info_s)); mhip->mhi_dsttype = MAC_ADDRTYPE_UNICAST; pether = (struct ether_header *)((char *)mp->b_rptr - sizeof (struct ether_header)); /* * Make sure the interface is an ethernet type, since we don't * know the header format for anything but Ethernet. Also make * sure we are pointing correctly above db_base. */ if (ill->ill_type != IFT_ETHER) return; retry: if ((uchar_t *)pether < mp->b_datap->db_base) return; /* Is there a VLAN tag? */ if (ill->ill_isv6) { if (pether->ether_type != htons(ETHERTYPE_IPV6)) { pether = (struct ether_header *)((char *)pether - 4); goto retry; } } else { if (pether->ether_type != htons(ETHERTYPE_IP)) { pether = (struct ether_header *)((char *)pether - 4); goto retry; } } mhip->mhi_daddr = (uchar_t *)&pether->ether_dhost; mhip->mhi_saddr = (uchar_t *)&pether->ether_shost; if (!(mhip->mhi_daddr[0] & 0x01)) return; /* Multicast or broadcast */ mhip->mhi_dsttype = MAC_ADDRTYPE_MULTICAST; if ((bmp = ill->ill_bcast_mp) != NULL) { dl_unitdata_req_t *dlur; uint8_t *bphys_addr; uint_t addrlen; dlur = (dl_unitdata_req_t *)bmp->b_rptr; addrlen = dlur->dl_dest_addr_length; if (ill->ill_sap_length < 0) { bphys_addr = (uchar_t *)dlur + dlur->dl_dest_addr_offset; addrlen += ill->ill_sap_length; } else { bphys_addr = (uchar_t *)dlur + dlur->dl_dest_addr_offset + ill->ill_sap_length; addrlen -= ill->ill_sap_length; } if (bcmp(mhip->mhi_daddr, bphys_addr, addrlen) == 0) mhip->mhi_dsttype = MAC_ADDRTYPE_BROADCAST; } } /* * Handle anything but M_DATA messages * We see the DL_UNITDATA_IND which are part * of the data path, and also the other messages from the driver. */ void ip_rput_notdata(ill_t *ill, mblk_t *mp) { mblk_t *first_mp; struct iocblk *iocp; struct mac_header_info_s mhi; switch (DB_TYPE(mp)) { case M_PROTO: case M_PCPROTO: { if (((dl_unitdata_ind_t *)mp->b_rptr)->dl_primitive != DL_UNITDATA_IND) { /* Go handle anything other than data elsewhere. */ ip_rput_dlpi(ill, mp); return; } first_mp = mp; mp = first_mp->b_cont; first_mp->b_cont = NULL; if (mp == NULL) { freeb(first_mp); return; } ip_dlur_to_mhi(ill, first_mp, &mhi); if (ill->ill_isv6) ip_input_v6(ill, NULL, mp, &mhi); else ip_input(ill, NULL, mp, &mhi); /* Ditch the DLPI header. */ freeb(first_mp); return; } case M_IOCACK: iocp = (struct iocblk *)mp->b_rptr; switch (iocp->ioc_cmd) { case DL_IOC_HDR_INFO: ill_fastpath_ack(ill, mp); return; default: putnext(ill->ill_rq, mp); return; } /* FALLTHRU */ case M_ERROR: case M_HANGUP: mutex_enter(&ill->ill_lock); if (ill->ill_state_flags & ILL_CONDEMNED) { mutex_exit(&ill->ill_lock); freemsg(mp); return; } ill_refhold_locked(ill); mutex_exit(&ill->ill_lock); qwriter_ip(ill, ill->ill_rq, mp, ip_rput_other, CUR_OP, B_FALSE); return; case M_CTL: putnext(ill->ill_rq, mp); return; case M_IOCNAK: ip1dbg(("got iocnak ")); iocp = (struct iocblk *)mp->b_rptr; switch (iocp->ioc_cmd) { case DL_IOC_HDR_INFO: ip_rput_other(NULL, ill->ill_rq, mp, NULL); return; default: break; } /* FALLTHRU */ default: putnext(ill->ill_rq, mp); return; } } /* Read side put procedure. Packets coming from the wire arrive here. */ void ip_rput(queue_t *q, mblk_t *mp) { ill_t *ill; union DL_primitives *dl; ill = (ill_t *)q->q_ptr; if (ill->ill_state_flags & (ILL_CONDEMNED | ILL_LL_SUBNET_PENDING)) { /* * If things are opening or closing, only accept high-priority * DLPI messages. (On open ill->ill_ipif has not yet been * created; on close, things hanging off the ill may have been * freed already.) */ dl = (union DL_primitives *)mp->b_rptr; if (DB_TYPE(mp) != M_PCPROTO || dl->dl_primitive == DL_UNITDATA_IND) { inet_freemsg(mp); return; } } if (DB_TYPE(mp) == M_DATA) { struct mac_header_info_s mhi; ip_mdata_to_mhi(ill, mp, &mhi); ip_input(ill, NULL, mp, &mhi); } else { ip_rput_notdata(ill, mp); } } /* * Move the information to a copy. */ mblk_t * ip_fix_dbref(mblk_t *mp, ip_recv_attr_t *ira) { mblk_t *mp1; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; IP_STAT(ipst, ip_db_ref); /* Make sure we have ira_l2src before we loose the original mblk */ if (!(ira->ira_flags & IRAF_L2SRC_SET)) ip_setl2src(mp, ira, ira->ira_rill); mp1 = copymsg(mp); if (mp1 == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ill); freemsg(mp); return (NULL); } /* preserve the hardware checksum flags and data, if present */ if (DB_CKSUMFLAGS(mp) != 0) { DB_CKSUMFLAGS(mp1) = DB_CKSUMFLAGS(mp); DB_CKSUMSTART(mp1) = DB_CKSUMSTART(mp); DB_CKSUMSTUFF(mp1) = DB_CKSUMSTUFF(mp); DB_CKSUMEND(mp1) = DB_CKSUMEND(mp); DB_CKSUM16(mp1) = DB_CKSUM16(mp); } freemsg(mp); return (mp1); } 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, dl_primstr(prim), err); return; } (void) mi_strlog(ill->ill_rq, 1, SL_CONSOLE|SL_ERROR|SL_TRACE, "%s: %s failed: %s\n", ill->ill_name, dl_primstr(prim), dl_errstr(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(ill_t *ill, 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; queue_t *q = ill->ill_rq; t_uscalar_t prim = dloa->dl_primitive; t_uscalar_t reqprim = DL_PRIM_INVAL; DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi", char *, dl_primstr(prim), ill_t *, ill); ip1dbg(("ip_rput_dlpi")); /* * If we received an ACK but didn't send a request for it, then it * can't be part of any pending operation; discard up-front. */ switch (prim) { case DL_ERROR_ACK: reqprim = dlea->dl_error_primitive; ip2dbg(("ip_rput_dlpi(%s): DL_ERROR_ACK for %s (0x%x): %s " "(0x%x), unix %u\n", ill->ill_name, dl_primstr(reqprim), reqprim, dl_errstr(dlea->dl_errno), dlea->dl_errno, dlea->dl_unix_errno)); break; case DL_OK_ACK: reqprim = dloa->dl_correct_primitive; break; case DL_INFO_ACK: reqprim = DL_INFO_REQ; break; case DL_BIND_ACK: reqprim = DL_BIND_REQ; break; case DL_PHYS_ADDR_ACK: reqprim = DL_PHYS_ADDR_REQ; break; case DL_NOTIFY_ACK: reqprim = DL_NOTIFY_REQ; break; case DL_CAPABILITY_ACK: reqprim = DL_CAPABILITY_REQ; break; } if (prim != DL_NOTIFY_IND) { if (reqprim == DL_PRIM_INVAL || !ill_dlpi_pending(ill, reqprim)) { /* Not a DLPI message we support or expected */ freemsg(mp); return; } ip1dbg(("ip_rput: received %s for %s\n", dl_primstr(prim), dl_primstr(reqprim))); } switch (reqprim) { case DL_UNBIND_REQ: /* * NOTE: we mark the unbind as complete even if we got a * DL_ERROR_ACK, since there's not much else we can do. */ mutex_enter(&ill->ill_lock); ill->ill_state_flags &= ~ILL_DL_UNBIND_IN_PROGRESS; cv_signal(&ill->ill_cv); mutex_exit(&ill->ill_lock); break; case DL_ENABMULTI_REQ: if (prim == DL_OK_ACK) { if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS) ill->ill_dlpi_multicast_state = IDS_OK; } break; } /* * The message is one we're waiting for (or DL_NOTIFY_IND), but we * need to become writer to continue to process it. Because an * exclusive operation doesn't complete until replies to all queued * DLPI messages have been received, we know we're in the middle of an * exclusive operation and pass CUR_OP (except for DL_NOTIFY_IND). * * As required by qwriter_ip(), we refhold the ill; it will refrele. * Since this is on the ill stream we unconditionally bump up the * refcount without doing ILL_CAN_LOOKUP(). */ ill_refhold(ill); if (prim == DL_NOTIFY_IND) qwriter_ip(ill, q, mp, ip_rput_dlpi_writer, NEW_OP, B_FALSE); else qwriter_ip(ill, q, mp, ip_rput_dlpi_writer, CUR_OP, B_FALSE); } /* * Handling of DLPI messages that require exclusive access to the ipsq. * * Need to do ipsq_pending_mp_get 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 = (ill_t *)q->q_ptr; ipif_t *ipif = NULL; mblk_t *mp1 = NULL; conn_t *connp = NULL; t_uscalar_t paddrreq; mblk_t *mp_hw; boolean_t success; boolean_t ioctl_aborted = B_FALSE; boolean_t log = B_TRUE; DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer", char *, dl_primstr(dloa->dl_primitive), ill_t *, ill); ip1dbg(("ip_rput_dlpi_writer ..")); ASSERT(ipsq->ipsq_xop == ill->ill_phyint->phyint_ipsq->ipsq_xop); ASSERT(IAM_WRITER_ILL(ill)); ipif = ipsq->ipsq_xop->ipx_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: ip1dbg(("ip_rput_dlpi_writer: got DL_ERROR_ACK for %s\n", dl_primstr(dlea->dl_error_primitive))); DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer error", char *, dl_primstr(dlea->dl_error_primitive), ill_t *, ill); switch (dlea->dl_error_primitive) { case DL_DISABMULTI_REQ: ill_dlpi_done(ill, dlea->dl_error_primitive); break; case DL_PROMISCON_REQ: case DL_PROMISCOFF_REQ: case DL_UNBIND_REQ: case DL_ATTACH_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. */ paddrreq = ill->ill_phys_addr_pend; ill_dlpi_done(ill, DL_PHYS_ADDR_REQ); if (paddrreq == DL_IPV6_TOKEN) { ill->ill_token_length = 0; log = B_FALSE; break; } else if (paddrreq == 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; mutex_enter(&ill->ill_lock); ill->ill_state_flags &= ~ILL_DOWN_IN_PROGRESS; mutex_exit(&ill->ill_lock); /* * 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 might be a result of a DL_NOTE_REPLUMB * notification. In that case, connp is NULL. */ if (connp != NULL) q = CONNP_TO_WQ(connp); (void) ipif_down(ipif, NULL, NULL); /* error is set below the switch */ } break; case DL_ENABMULTI_REQ: ill_dlpi_done(ill, DL_ENABMULTI_REQ); if (ill->ill_dlpi_multicast_state == IDS_INPROGRESS) ill->ill_dlpi_multicast_state = IDS_FAILED; if (ill->ill_dlpi_multicast_state == IDS_FAILED) { printf("ip: joining multicasts failed (%d)" " on %s - will use link layer " "broadcasts for multicast\n", dlea->dl_errno, ill->ill_name); /* * Set up for multi_bcast; We are the * writer, so ok to access ill->ill_ipif * without any lock. */ mutex_enter(&ill->ill_phyint->phyint_lock); ill->ill_phyint->phyint_flags |= PHYI_MULTI_BCAST; mutex_exit(&ill->ill_phyint->phyint_lock); } freemsg(mp); /* Don't want to pass this up */ return; case DL_CAPABILITY_REQ: ip1dbg(("ip_rput_dlpi_writer: got DL_ERROR_ACK for " "DL_CAPABILITY REQ\n")); if (ill->ill_dlpi_capab_state == IDCS_PROBE_SENT) ill->ill_dlpi_capab_state = IDCS_FAILED; ill_capability_done(ill); 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: ill_capability_ack(ill, mp); /* * The message has been handed off to ill_capability_ack * and must not be freed below */ mp = NULL; 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) { DTRACE_PROBE2(ip__rput__dlpi__ifname__pending, ill_t *, ill, mblk_t *, mp); break; } mutex_enter(&ill->ill_lock); ill->ill_dl_up = 1; ill->ill_state_flags &= ~ILL_DOWN_IN_PROGRESS; mutex_exit(&ill->ill_lock); if (!ioctl_aborted) mp1 = ipsq_pending_mp_get(ipsq, &connp); if (mp1 == NULL) { DTRACE_PROBE1(ip__rput__dlpi__no__mblk, ill_t *, ill); break; } /* * mp1 was added by ill_dl_up(). if that is a result of * a DL_NOTE_REPLUMB notification, connp could be NULL. */ if (connp != NULL) q = CONNP_TO_WQ(connp); /* * We are exclusive. So nothing can change even after * we get the pending mp. */ ip1dbg(("ip_rput_dlpi: bind_ack %s\n", ill->ill_name)); DTRACE_PROBE1(ip__rput__dlpi__bind__ack, ill_t *, ill); ill_nic_event_dispatch(ill, 0, NE_UP, NULL, 0); /* * 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 */ (void) ipif_resolver_up(ipif, Res_act_initial); if ((err = ipif_ndp_up(ipif, B_TRUE)) == 0) 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(). */ if (connp != NULL) 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); if (connp != NULL) mutex_exit(&connp->conn_lock); if (success) { err = ipif_resolver_up(ipif, Res_act_initial); if (err == EINPROGRESS) { freemsg(mp); return; } 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 we have a moved ipif to bring up, and everything has * succeeded to this point, bring it up on the IPMP ill. * Otherwise, leave it down -- the admin can try to bring it * up by hand if need be. */ if (ill->ill_move_ipif != NULL) { if (err != 0) { ill->ill_move_ipif = NULL; } else { ipif = ill->ill_move_ipif; ill->ill_move_ipif = NULL; err = ipif_up(ipif, q, mp1); if (err == EINPROGRESS) { freemsg(mp); return; } } } break; case DL_NOTIFY_IND: { dl_notify_ind_t *notify = (dl_notify_ind_t *)mp->b_rptr; uint_t orig_mtu, orig_mc_mtu; switch (notify->dl_notification) { case DL_NOTE_PHYS_ADDR: err = ill_set_phys_addr(ill, mp); break; case DL_NOTE_REPLUMB: /* * Directly return after calling ill_replumb(). * Note that we should not free mp as it is reused * in the ill_replumb() function. */ err = ill_replumb(ill, mp); return; case DL_NOTE_FASTPATH_FLUSH: nce_flush(ill, B_FALSE); break; case DL_NOTE_SDU_SIZE: case DL_NOTE_SDU_SIZE2: /* * The dce and fragmentation code can cope with * this changing while packets are being sent. * When packets are sent ip_output will discover * a change. * * Change the MTU size of the interface. */ mutex_enter(&ill->ill_lock); orig_mtu = ill->ill_mtu; orig_mc_mtu = ill->ill_mc_mtu; switch (notify->dl_notification) { case DL_NOTE_SDU_SIZE: ill->ill_current_frag = (uint_t)notify->dl_data; ill->ill_mc_mtu = (uint_t)notify->dl_data; break; case DL_NOTE_SDU_SIZE2: ill->ill_current_frag = (uint_t)notify->dl_data1; ill->ill_mc_mtu = (uint_t)notify->dl_data2; break; } if (ill->ill_current_frag > ill->ill_max_frag) ill->ill_max_frag = ill->ill_current_frag; if (!(ill->ill_flags & ILLF_FIXEDMTU)) { ill->ill_mtu = ill->ill_current_frag; /* * If ill_user_mtu was set (via * SIOCSLIFLNKINFO), clamp ill_mtu at it. */ if (ill->ill_user_mtu != 0 && ill->ill_user_mtu < ill->ill_mtu) ill->ill_mtu = ill->ill_user_mtu; if (ill->ill_user_mtu != 0 && ill->ill_user_mtu < ill->ill_mc_mtu) ill->ill_mc_mtu = ill->ill_user_mtu; if (ill->ill_isv6) { if (ill->ill_mtu < IPV6_MIN_MTU) ill->ill_mtu = IPV6_MIN_MTU; if (ill->ill_mc_mtu < IPV6_MIN_MTU) ill->ill_mc_mtu = IPV6_MIN_MTU; } else { if (ill->ill_mtu < IP_MIN_MTU) ill->ill_mtu = IP_MIN_MTU; if (ill->ill_mc_mtu < IP_MIN_MTU) ill->ill_mc_mtu = IP_MIN_MTU; } } else if (ill->ill_mc_mtu > ill->ill_mtu) { ill->ill_mc_mtu = ill->ill_mtu; } mutex_exit(&ill->ill_lock); /* * Make sure all dce_generation checks find out * that ill_mtu/ill_mc_mtu has changed. */ if (orig_mtu != ill->ill_mtu || orig_mc_mtu != ill->ill_mc_mtu) { dce_increment_all_generations(ill->ill_isv6, ill->ill_ipst); } /* * Refresh IPMP meta-interface MTU if necessary. */ if (IS_UNDER_IPMP(ill)) ipmp_illgrp_refresh_mtu(ill->ill_grp); 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 (IS_IPMP(ill)) { new_phyint_flags = went_up ? new_phyint_flags & ~PHYI_FAILED : new_phyint_flags | PHYI_FAILED; } 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: { phyint_t *phyint = ill->ill_phyint; mutex_enter(&phyint->phyint_lock); phyint->phyint_flags |= PHYI_PROMISC; mutex_exit(&phyint->phyint_lock); break; } case DL_NOTE_PROMISC_OFF_PHYS: { phyint_t *phyint = ill->ill_phyint; mutex_enter(&phyint->phyint_lock); phyint->phyint_flags &= ~PHYI_PROMISC; mutex_exit(&phyint->phyint_lock); break; } case DL_NOTE_CAPAB_RENEG: /* * Something changed on the driver side. * It wants us to renegotiate the capabilities * on this ill. One possible cause is the aggregation * interface under us where a port got added or * went away. * * If the capability negotiation is already done * or is in progress, reset the capabilities and * mark the ill's ill_capab_reneg to be B_TRUE, * so that when the ack comes back, we can start * the renegotiation process. * * Note that if ill_capab_reneg is already B_TRUE * (ill_dlpi_capab_state is IDS_UNKNOWN in this case), * the capability resetting request has been sent * and the renegotiation has not been started yet; * nothing needs to be done in this case. */ ipsq_current_start(ipsq, ill->ill_ipif, 0); ill_capability_reset(ill, B_TRUE); ipsq_current_finish(ipsq); break; case DL_NOTE_ALLOWED_IPS: ill_set_allowed_ips(ill, mp); 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: { /* * As part of plumbing the interface via SIOCSLIFNAME, * ill_dl_phys() will queue a series of DL_PHYS_ADDR_REQs, * whose answers we receive here. As each answer is received, * we call ill_dlpi_done() to dispatch the next request as * we're processing the current one. Once all answers have * been received, we use ipsq_pending_mp_get() to dequeue the * outstanding IOCTL and reply to it. (Because ill_dl_phys() * is invoked from an ill queue, conn_oper_pending_ill is not * available, but we know the ioctl is pending on ill_wq.) */ uint_t paddrlen, paddroff; uint8_t *addr; paddrreq = ill->ill_phys_addr_pend; paddrlen = ((dl_phys_addr_ack_t *)mp->b_rptr)->dl_addr_length; paddroff = ((dl_phys_addr_ack_t *)mp->b_rptr)->dl_addr_offset; addr = mp->b_rptr + paddroff; ill_dlpi_done(ill, DL_PHYS_ADDR_REQ); if (paddrreq == 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. */ bcopy(addr, &ill->ill_token.s6_addr32[2], paddrlen); ill->ill_token_length = paddrlen; break; } else if (paddrreq == DL_IPV6_LINK_LAYER_ADDR) { ASSERT(ill->ill_nd_lla_mp == NULL); ill_set_ndmp(ill, mp, paddroff, paddrlen); mp = NULL; break; } else if (paddrreq == DL_CURR_DEST_ADDR) { ASSERT(ill->ill_dest_addr_mp == NULL); ill->ill_dest_addr_mp = mp; ill->ill_dest_addr = addr; mp = NULL; if (ill->ill_isv6) { ill_setdesttoken(ill); ipif_setdestlinklocal(ill->ill_ipif); } break; } ASSERT(paddrreq == 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; } ill->ill_phys_addr_mp = mp; ill->ill_phys_addr = (paddrlen == 0 ? NULL : addr); mp = NULL; /* * If paddrlen or ill_phys_addr_length is zero, the DLPI * provider doesn't support physical addresses. We check both * paddrlen and ill_phys_addr_length because sppp (PPP) does * not have physical addresses, but historically adversises a * physical address length of 0 in its DL_INFO_ACK, but 6 in * its DL_PHYS_ADDR_ACK. */ if (paddrlen == 0 || ill->ill_phys_addr_length == 0) { ill->ill_phys_addr = NULL; } else if (paddrlen != ill->ill_phys_addr_length) { ip0dbg(("DL_PHYS_ADDR_ACK: got addrlen %d, expected %d", paddrlen, ill->ill_phys_addr_length)); err = EINVAL; break; } if (ill->ill_nd_lla_mp == NULL) { if ((mp_hw = copyb(ill->ill_phys_addr_mp)) == NULL) { err = ENOMEM; break; } ill_set_ndmp(ill, mp_hw, paddroff, paddrlen); } if (ill->ill_isv6) { ill_setdefaulttoken(ill); ipif_setlinklocal(ill->ill_ipif); } break; } case DL_OK_ACK: ip2dbg(("DL_OK_ACK %s (0x%x)\n", dl_primstr((int)dloa->dl_correct_primitive), dloa->dl_correct_primitive)); DTRACE_PROBE3(ill__dlpi, char *, "ip_rput_dlpi_writer ok", char *, dl_primstr(dloa->dl_correct_primitive), ill_t *, ill); switch (dloa->dl_correct_primitive) { case DL_ENABMULTI_REQ: case DL_DISABMULTI_REQ: ill_dlpi_done(ill, dloa->dl_correct_primitive); break; case DL_PROMISCON_REQ: case DL_PROMISCOFF_REQ: case DL_UNBIND_REQ: case DL_ATTACH_REQ: ill_dlpi_done(ill, dloa->dl_correct_primitive); break; } break; default: break; } freemsg(mp); if (mp1 == NULL) return; /* * The operation must complete without EINPROGRESS since * ipsq_pending_mp_get() has removed the mblk (mp1). Otherwise, * the operation will be stuck forever inside the IPSQ. */ ASSERT(err != EINPROGRESS); DTRACE_PROBE4(ipif__ioctl, char *, "ip_rput_dlpi_writer finish", int, ipsq->ipsq_xop->ipx_current_ioctl, ill_t *, ill, ipif_t *, NULL); switch (ipsq->ipsq_xop->ipx_current_ioctl) { case 0: ipsq_current_finish(ipsq); break; case SIOCSLIFNAME: case IF_UNITSEL: { ill_t *ill_other = ILL_OTHER(ill); /* * If SIOCSLIFNAME or IF_UNITSEL is about to succeed, and the * ill has a peer which is in an IPMP group, then place ill * into the same group. One catch: although ifconfig plumbs * the appropriate IPMP meta-interface prior to plumbing this * ill, it is possible for multiple ifconfig applications to * race (or for another application to adjust plumbing), in * which case the IPMP meta-interface we need will be missing. * If so, kick the phyint out of the group. */ if (err == 0 && ill_other != NULL && IS_UNDER_IPMP(ill_other)) { ipmp_grp_t *grp = ill->ill_phyint->phyint_grp; ipmp_illgrp_t *illg; illg = ill->ill_isv6 ? grp->gr_v6 : grp->gr_v4; if (illg == NULL) ipmp_phyint_leave_grp(ill->ill_phyint); else ipmp_ill_join_illgrp(ill, illg); } if (ipsq->ipsq_xop->ipx_current_ioctl == IF_UNITSEL) ip_ioctl_finish(q, mp1, err, NO_COPYOUT, ipsq); else ip_ioctl_finish(q, mp1, err, COPYOUT, ipsq); break; } case SIOCLIFADDIF: ip_ioctl_finish(q, mp1, err, COPYOUT, ipsq); break; default: ip_ioctl_finish(q, mp1, err, NO_COPYOUT, ipsq); break; } } /* * ip_rput_other is called by ip_rput to handle messages modifying the global * state in IP. If 'ipsq' is non-NULL, caller is writer on it. */ /* ARGSUSED */ void ip_rput_other(ipsq_t *ipsq, queue_t *q, mblk_t *mp, void *dummy_arg) { ill_t *ill = q->q_ptr; struct iocblk *iocp; ip1dbg(("ip_rput_other ")); if (ipsq != NULL) { ASSERT(IAM_WRITER_IPSQ(ipsq)); ASSERT(ipsq->ipsq_xop == ill->ill_phyint->phyint_ipsq->ipsq_xop); } 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_IOCNAK: { iocp = (struct iocblk *)mp->b_rptr; ASSERT(iocp->ioc_cmd == DL_IOC_HDR_INFO); /* * If this was the first attempt, turn off 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); /* * don't flush the nce_t entries: we use them * as an index to the ncec itself. */ ip1dbg(("ip_rput: DLPI fastpath off on interface %s\n", ill->ill_name)); } else { mutex_exit(&ill->ill_lock); } freemsg(mp); break; } default: ASSERT(0); break; } } /* * Update any source route, record route or timestamp options * When it fails it has consumed the message and BUMPed the MIB. */ boolean_t ip_forward_options(mblk_t *mp, ipha_t *ipha, ill_t *dst_ill, ip_recv_attr_t *ira) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; ipaddr_t ifaddr; uint32_t ts; timestruc_t now; ip_stack_t *ipst = ira->ira_ill->ill_ipst; ip2dbg(("ip_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_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 (!ipst->ips_ip_forward_src_routed) { BUMP_MIB(dst_ill->ill_ip_mib, ipIfStatsForwProhibits); ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, dst_ill); icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, ira); return (B_FALSE); } if (ip_type_v4(dst, ipst) != IRE_LOCAL) { /* * Must be partial since ip_input_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_forward_options: end of SR\n")); break; } /* Pick a reasonable address on the outbound if */ ASSERT(dst_ill != NULL); if (ip_select_source_v4(dst_ill, INADDR_ANY, dst, INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL, NULL) != 0) { /* No source! Shouldn't happen */ ifaddr = INADDR_ANY; } bcopy((char *)opt + off, &dst, IP_ADDR_LEN); bcopy(&ifaddr, (char *)opt + off, IP_ADDR_LEN); ip1dbg(("ip_forward_options: next hop 0x%x\n", ntohl(dst))); /* * Check if our address is present more than * once as consecutive hops in source route. */ if (ip_type_v4(dst, ipst) == IRE_LOCAL) { off += IP_ADDR_LEN; opt[IPOPT_OFFSET] += IP_ADDR_LEN; goto redo_srr; } ipha->ipha_dst = dst; opt[IPOPT_OFFSET] += IP_ADDR_LEN; 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_forward_options: end of RR\n")); break; } /* Pick a reasonable address on the outbound if */ ASSERT(dst_ill != NULL); if (ip_select_source_v4(dst_ill, INADDR_ANY, dst, INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL, NULL) != 0) { /* No source! Shouldn't happen */ ifaddr = INADDR_ANY; } bcopy(&ifaddr, (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); if (ip_type_v4(dst, ipst) != IRE_LOCAL) { /* Not for us */ break; } /* 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_forward_options: " "unknown IT - bug in ip_input_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: /* Pick a reasonable addr on the outbound if */ ASSERT(dst_ill != NULL); if (ip_select_source_v4(dst_ill, INADDR_ANY, dst, INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL, NULL) != 0) { /* No source! Shouldn't happen */ ifaddr = INADDR_ANY; } bcopy(&ifaddr, (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 + NSEC2MSEC(now.tv_nsec); bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN); opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN; break; } break; } } return (B_TRUE); } /* * 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; ip_stack_t *ipst = ill->ill_ipst; time_t timeout; 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); timeout = (ill->ill_isv6 ? ipst->ips_ipv6_reassembly_timeout : ipst->ips_ip_reassembly_timeout); frag_pending = ill_frag_timeout(ill, 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) { ip_stack_t *ipst = ill->ill_ipst; clock_t timeo_ms; 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) { timeo_ms = (ill->ill_isv6 ? ipst->ips_ipv6_reassembly_timeout : ipst->ips_ip_reassembly_timeout) * SECONDS; /* * 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(timeo_ms >> 1)); ill->ill_fragtimer_needrestart = 0; } } /* * 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_input_options(). */ boolean_t ip_input_local_options(mblk_t *mp, ipha_t *ipha, ip_recv_attr_t *ira) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; ipaddr_t ifaddr; uint32_t ts; timestruc_t now; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; ip2dbg(("ip_input_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_input_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_input_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_input_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_input_local_options: end of RR\n")); break; } /* Pick a reasonable address on the outbound if */ if (ip_select_source_v4(ill, INADDR_ANY, ipha->ipha_dst, INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL, NULL) != 0) { /* No source! Shouldn't happen */ ifaddr = INADDR_ANY; } bcopy(&ifaddr, (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); if (ip_type_v4(dst, ipst) != IRE_LOCAL) { /* Not for us */ break; } /* 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_input_local_options: " "unknown IT - bug in ip_input_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: /* Pick a reasonable addr on the outbound if */ if (ip_select_source_v4(ill, INADDR_ANY, ipha->ipha_dst, INADDR_ANY, ALL_ZONES, ipst, &ifaddr, NULL, NULL) != 0) { /* No source! Shouldn't happen */ ifaddr = INADDR_ANY; } bcopy(&ifaddr, (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 + NSEC2MSEC(now.tv_nsec); bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN); opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN; break; } break; } } return (B_TRUE); bad_src_route: /* make sure we clear any indication of a hardware checksum */ DB_CKSUMFLAGS(mp) = 0; ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ill); icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, ira); return (B_FALSE); } /* * Process IP options in an inbound packet. Always returns the nexthop. * Normally this is the passed in nexthop, but if there is an option * that effects the nexthop (such as a source route) that will be returned. * Sets *errorp if there is an error, in which case an ICMP error has been sent * and mp freed. */ ipaddr_t ip_input_options(ipha_t *ipha, ipaddr_t dst, mblk_t *mp, ip_recv_attr_t *ira, int *errorp) { ip_stack_t *ipst = ira->ira_ill->ill_ipst; ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; intptr_t code = 0; ire_t *ire; ip2dbg(("ip_input_options\n")); *errorp = 0; for (optval = ipoptp_first(&opts, ipha); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { opt = opts.ipoptp_cur; optlen = opts.ipoptp_len; ip2dbg(("ip_input_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: if (ip_type_v4(dst, ipst) != IRE_LOCAL) { if (optval == IPOPT_SSRR) { ip1dbg(("ip_input_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_input_options: " "not next source route 0x%x\n", ntohl(dst))); break; } if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { ip1dbg(( "ip_input_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_input_options: end of SR\n")); break; } bcopy((char *)opt + off, &dst, IP_ADDR_LEN); ip1dbg(("ip_input_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? */ if (ip_type_v4(dst, ipst) == IRE_LOCAL) { off += IP_ADDR_LEN; goto redo_srr; } if (dst == htonl(INADDR_LOOPBACK)) { ip1dbg(("ip_input_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_v4(dst, 0, 0, IRE_INTERFACE, NULL, ALL_ZONES, ira->ira_tsl, MATCH_IRE_TYPE | MATCH_IRE_SECATTR, 0, ipst, NULL); if (ire == NULL) { ip1dbg(("ip_input_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_input_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_input_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 (dst); } ip1dbg(("ip_input_options: error processing IP options.")); code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha; param_prob: /* make sure we clear any indication of a hardware checksum */ DB_CKSUMFLAGS(mp) = 0; ip_drop_input("ICMP_PARAM_PROBLEM", mp, ira->ira_ill); icmp_param_problem(mp, (uint8_t)code, ira); *errorp = -1; return (dst); bad_src_route: /* make sure we clear any indication of a hardware checksum */ DB_CKSUMFLAGS(mp) = 0; ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ira->ira_ill); icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, ira); *errorp = -1; return (dst); } /* * 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) all IPv4 Neighbor Cache entries * - 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 IPv6 Neighbor Cache entries * - ipv6AddrEntry all IPv6 ipifs * - ipv6 multicast membership (ipv6_member_t) * - ipv6 multicast source filtering (ipv6_grpsrc_t) * * NOTE: original mpctl is copied for msg's 2..N, since its ctl part is * already filled in by the caller. * If legacy_req is true then MIB structures needs to be truncated to their * legacy sizes before being returned. * 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, int level, boolean_t legacy_req) { ip_stack_t *ipst; sctp_stack_t *sctps; if (q->q_next != NULL) { ipst = ILLQ_TO_IPST(q); } else { ipst = CONNQ_TO_IPST(q); } ASSERT(ipst != NULL); sctps = ipst->ips_netstack->netstack_sctp; if (mpctl == NULL || mpctl->b_cont == NULL) { return (0); } /* * For the purposes of the (broken) packet shell use * of the level we make sure MIB2_TCP/MIB2_UDP can be used * to make TCP and UDP appear first in the list of mib items. * TBD: We could expand this and use it in netstat so that * the kernel doesn't have to produce large tables (connections, * routes, etc) when netstat only wants the statistics or a particular * table. */ if (!(level == MIB2_TCP || level == MIB2_UDP)) { if ((mpctl = icmp_snmp_get(q, mpctl)) == NULL) { return (1); } } if (level != MIB2_TCP) { if ((mpctl = udp_snmp_get(q, mpctl, legacy_req)) == NULL) { return (1); } } if (level != MIB2_UDP) { if ((mpctl = tcp_snmp_get(q, mpctl, legacy_req)) == NULL) { return (1); } } if ((mpctl = ip_snmp_get_mib2_ip_traffic_stats(q, mpctl, ipst, legacy_req)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6(q, mpctl, ipst, legacy_req)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_icmp(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_icmp6(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_igmp(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_multi(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_addr(q, mpctl, ipst, legacy_req)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6_addr(q, mpctl, ipst, legacy_req)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_group_mem(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6_group_mem(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_group_src(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip6_group_src(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_virt_multi(q, mpctl, ipst)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_multi_rtable(q, mpctl, ipst)) == NULL) { return (1); } mpctl = ip_snmp_get_mib2_ip_route_media(q, mpctl, level, ipst); if (mpctl == NULL) return (1); mpctl = ip_snmp_get_mib2_ip6_route_media(q, mpctl, level, ipst); if (mpctl == NULL) return (1); if ((mpctl = sctp_snmp_get_mib2(q, mpctl, sctps)) == NULL) { return (1); } if ((mpctl = ip_snmp_get_mib2_ip_dce(q, mpctl, ipst)) == NULL) { return (1); } freemsg(mpctl); return (1); } /* Get global (legacy) IPv4 statistics */ static mblk_t * ip_snmp_get_mib2_ip(queue_t *q, mblk_t *mpctl, mib2_ipIfStatsEntry_t *ipmib, ip_stack_t *ipst, boolean_t legacy_req) { mib2_ip_t old_ip_mib; struct opthdr *optp; mblk_t *mp2ctl; mib2_ipAddrEntry_t mae; /* * 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(old_ip_mib.ipForwarding, (WE_ARE_FORWARDING(ipst) ? 1 : 2)); SET_MIB(old_ip_mib.ipDefaultTTL, (uint32_t)ipst->ips_ip_def_ttl); SET_MIB(old_ip_mib.ipReasmTimeout, ipst->ips_ip_reassembly_timeout); SET_MIB(old_ip_mib.ipAddrEntrySize, (legacy_req) ? LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t) : sizeof (mib2_ipAddrEntry_t)); SET_MIB(old_ip_mib.ipRouteEntrySize, sizeof (mib2_ipRouteEntry_t)); SET_MIB(old_ip_mib.ipNetToMediaEntrySize, sizeof (mib2_ipNetToMediaEntry_t)); SET_MIB(old_ip_mib.ipMemberEntrySize, sizeof (ip_member_t)); SET_MIB(old_ip_mib.ipGroupSourceEntrySize, sizeof (ip_grpsrc_t)); SET_MIB(old_ip_mib.ipRouteAttributeSize, sizeof (mib2_ipAttributeEntry_t)); SET_MIB(old_ip_mib.transportMLPSize, sizeof (mib2_transportMLPEntry_t)); SET_MIB(old_ip_mib.ipDestEntrySize, sizeof (dest_cache_entry_t)); /* * Grab the statistics from the new IP MIB */ SET_MIB(old_ip_mib.ipInReceives, (uint32_t)ipmib->ipIfStatsHCInReceives); SET_MIB(old_ip_mib.ipInHdrErrors, ipmib->ipIfStatsInHdrErrors); SET_MIB(old_ip_mib.ipInAddrErrors, ipmib->ipIfStatsInAddrErrors); SET_MIB(old_ip_mib.ipForwDatagrams, (uint32_t)ipmib->ipIfStatsHCOutForwDatagrams); SET_MIB(old_ip_mib.ipInUnknownProtos, ipmib->ipIfStatsInUnknownProtos); SET_MIB(old_ip_mib.ipInDiscards, ipmib->ipIfStatsInDiscards); SET_MIB(old_ip_mib.ipInDelivers, (uint32_t)ipmib->ipIfStatsHCInDelivers); SET_MIB(old_ip_mib.ipOutRequests, (uint32_t)ipmib->ipIfStatsHCOutRequests); SET_MIB(old_ip_mib.ipOutDiscards, ipmib->ipIfStatsOutDiscards); SET_MIB(old_ip_mib.ipOutNoRoutes, ipmib->ipIfStatsOutNoRoutes); SET_MIB(old_ip_mib.ipReasmReqds, ipmib->ipIfStatsReasmReqds); SET_MIB(old_ip_mib.ipReasmOKs, ipmib->ipIfStatsReasmOKs); SET_MIB(old_ip_mib.ipReasmFails, ipmib->ipIfStatsReasmFails); SET_MIB(old_ip_mib.ipFragOKs, ipmib->ipIfStatsOutFragOKs); SET_MIB(old_ip_mib.ipFragFails, ipmib->ipIfStatsOutFragFails); SET_MIB(old_ip_mib.ipFragCreates, ipmib->ipIfStatsOutFragCreates); /* ipRoutingDiscards is not being used */ SET_MIB(old_ip_mib.ipRoutingDiscards, 0); SET_MIB(old_ip_mib.tcpInErrs, ipmib->tcpIfStatsInErrs); SET_MIB(old_ip_mib.udpNoPorts, ipmib->udpIfStatsNoPorts); SET_MIB(old_ip_mib.ipInCksumErrs, ipmib->ipIfStatsInCksumErrs); SET_MIB(old_ip_mib.ipReasmDuplicates, ipmib->ipIfStatsReasmDuplicates); SET_MIB(old_ip_mib.ipReasmPartDups, ipmib->ipIfStatsReasmPartDups); SET_MIB(old_ip_mib.ipForwProhibits, ipmib->ipIfStatsForwProhibits); SET_MIB(old_ip_mib.udpInCksumErrs, ipmib->udpIfStatsInCksumErrs); SET_MIB(old_ip_mib.udpInOverflows, ipmib->udpIfStatsInOverflows); SET_MIB(old_ip_mib.rawipInOverflows, ipmib->rawipIfStatsInOverflows); SET_MIB(old_ip_mib.ipsecInSucceeded, ipmib->ipsecIfStatsInSucceeded); SET_MIB(old_ip_mib.ipsecInFailed, ipmib->ipsecIfStatsInFailed); SET_MIB(old_ip_mib.ipInIPv6, ipmib->ipIfStatsInWrongIPVersion); SET_MIB(old_ip_mib.ipOutIPv6, ipmib->ipIfStatsOutWrongIPVersion); SET_MIB(old_ip_mib.ipOutSwitchIPv6, ipmib->ipIfStatsOutSwitchIPVersion); if (!snmp_append_data(mpctl->b_cont, (char *)&old_ip_mib, (int)sizeof (old_ip_mib))) { ip1dbg(("ip_snmp_get_mib2_ip: failed to allocate %u bytes\n", (uint_t)sizeof (old_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); } /* Per interface IPv4 statistics */ static mblk_t * ip_snmp_get_mib2_ip_traffic_stats(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst, boolean_t legacy_req) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ill_walk_context_t ctx; mblk_t *mp_tail = NULL; mib2_ipIfStatsEntry_t global_ip_mib; mib2_ipAddrEntry_t mae; /* * Make a copy of the original message */ mp2ctl = copymsg(mpctl); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP; optp->name = MIB2_IP_TRAFFIC_STATS; /* Include "unknown interface" ip_mib */ ipst->ips_ip_mib.ipIfStatsIPVersion = MIB2_INETADDRESSTYPE_ipv4; ipst->ips_ip_mib.ipIfStatsIfIndex = MIB2_UNKNOWN_INTERFACE; /* Flag to netstat */ SET_MIB(ipst->ips_ip_mib.ipIfStatsForwarding, (ipst->ips_ip_forwarding ? 1 : 2)); SET_MIB(ipst->ips_ip_mib.ipIfStatsDefaultTTL, (uint32_t)ipst->ips_ip_def_ttl); SET_MIB(ipst->ips_ip_mib.ipIfStatsEntrySize, sizeof (mib2_ipIfStatsEntry_t)); SET_MIB(ipst->ips_ip_mib.ipIfStatsAddrEntrySize, sizeof (mib2_ipAddrEntry_t)); SET_MIB(ipst->ips_ip_mib.ipIfStatsRouteEntrySize, sizeof (mib2_ipRouteEntry_t)); SET_MIB(ipst->ips_ip_mib.ipIfStatsNetToMediaEntrySize, sizeof (mib2_ipNetToMediaEntry_t)); SET_MIB(ipst->ips_ip_mib.ipIfStatsMemberEntrySize, sizeof (ip_member_t)); SET_MIB(ipst->ips_ip_mib.ipIfStatsGroupSourceEntrySize, sizeof (ip_grpsrc_t)); bcopy(&ipst->ips_ip_mib, &global_ip_mib, sizeof (global_ip_mib)); if (legacy_req) { SET_MIB(global_ip_mib.ipIfStatsAddrEntrySize, LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t)); } if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&global_ip_mib, (int)sizeof (global_ip_mib))) { ip1dbg(("ip_snmp_get_mib2_ip_traffic_stats: " "failed to allocate %u bytes\n", (uint_t)sizeof (global_ip_mib))); } rw_enter(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ill->ill_ip_mib->ipIfStatsIfIndex = ill->ill_phyint->phyint_ifindex; SET_MIB(ill->ill_ip_mib->ipIfStatsForwarding, (ipst->ips_ip_forwarding ? 1 : 2)); SET_MIB(ill->ill_ip_mib->ipIfStatsDefaultTTL, (uint32_t)ipst->ips_ip_def_ttl); ip_mib2_add_ip_stats(&global_ip_mib, ill->ill_ip_mib); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)ill->ill_ip_mib, (int)sizeof (*ill->ill_ip_mib))) { ip1dbg(("ip_snmp_get_mib2_ip_traffic_stats: " "failed to allocate %u bytes\n", (uint_t)sizeof (*ill->ill_ip_mib))); } } rw_exit(&ipst->ips_ill_g_lock); optp->len = (t_uscalar_t)msgdsize(mpctl->b_cont); ip3dbg(("ip_snmp_get_mib2_ip_traffic_stats: " "level %d, name %d, len %d\n", (int)optp->level, (int)optp->name, (int)optp->len)); qreply(q, mpctl); if (mp2ctl == NULL) return (NULL); return (ip_snmp_get_mib2_ip(q, mp2ctl, &global_ip_mib, ipst, legacy_req)); } /* Global IPv4 ICMP statistics */ static mblk_t * ip_snmp_get_mib2_icmp(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst) { 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 *)&ipst->ips_icmp_mib, (int)sizeof (ipst->ips_icmp_mib))) { ip1dbg(("ip_snmp_get_mib2_icmp: failed to allocate %u bytes\n", (uint_t)sizeof (ipst->ips_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, ip_stack_t *ipst) { 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 *)&ipst->ips_igmpstat, (int)sizeof (ipst->ips_igmpstat))) { ip1dbg(("ip_snmp_get_mib2_igmp: failed to allocate %u bytes\n", (uint_t)sizeof (ipst->ips_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, ip_stack_t *ipst) { 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, ipst)) { 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, ip_stack_t *ipst, boolean_t legacy_req) { struct opthdr *optp; mblk_t *mp2ctl; mblk_t *mp_tail = NULL; ill_t *ill; ipif_t *ipif; uint_t bitval; mib2_ipAddrEntry_t mae; size_t mae_size; zoneid_t zoneid; ill_walk_context_t ctx; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); mae_size = (legacy_req) ? LEGACY_MIB_SIZE(&mae, mib2_ipAddrEntry_t) : sizeof (mib2_ipAddrEntry_t); /* 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(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx, ipst); 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; /* Sum of count from dead IRE_LO* and our current */ mae.ipAdEntInfo.ae_ibcnt = ipif->ipif_ib_pkt_count; if (ipif->ipif_ire_local != NULL) { mae.ipAdEntInfo.ae_ibcnt += ipif->ipif_ire_local->ire_ib_pkt_count; } mae.ipAdEntInfo.ae_obcnt = 0; mae.ipAdEntInfo.ae_focnt = 0; 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_lcl_addr; for (bitval = 1; bitval && !(bitval & ipif->ipif_brd_addr); bitval <<= 1) noop; mae.ipAdEntBcastAddr = bitval; mae.ipAdEntReasmMaxSize = IP_MAXPACKET; mae.ipAdEntInfo.ae_mtu = ipif->ipif_ill->ill_mtu; mae.ipAdEntInfo.ae_metric = ipif->ipif_ill->ill_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; mae.ipAdEntRetransmitTime = ill->ill_reachable_retrans_time; if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&mae, (int)mae_size)) { ip1dbg(("ip_snmp_get_mib2_ip_addr: failed to " "allocate %u bytes\n", (uint_t)mae_size)); } } } rw_exit(&ipst->ips_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, ip_stack_t *ipst, boolean_t legacy_req) { struct opthdr *optp; mblk_t *mp2ctl; mblk_t *mp_tail = NULL; ill_t *ill; ipif_t *ipif; mib2_ipv6AddrEntry_t mae6; size_t mae6_size; zoneid_t zoneid; ill_walk_context_t ctx; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); mae6_size = (legacy_req) ? LEGACY_MIB_SIZE(&mae6, mib2_ipv6AddrEntry_t) : sizeof (mib2_ipv6AddrEntry_t); /* 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(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx, ipst); 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; /* Sum of count from dead IRE_LO* and our current */ mae6.ipv6AddrInfo.ae_ibcnt = ipif->ipif_ib_pkt_count; if (ipif->ipif_ire_local != NULL) { mae6.ipv6AddrInfo.ae_ibcnt += ipif->ipif_ire_local->ire_ib_pkt_count; } mae6.ipv6AddrInfo.ae_obcnt = 0; mae6.ipv6AddrInfo.ae_focnt = 0; 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_v6lcl_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_ill->ill_mtu; mae6.ipv6AddrInfo.ae_metric = ipif->ipif_ill->ill_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; mae6.ipv6AddrReasmMaxSize = IP_MAXPACKET; mae6.ipv6AddrIdentifier = ill->ill_token; mae6.ipv6AddrIdentifierLen = ill->ill_token_length; mae6.ipv6AddrReachableTime = ill->ill_reachable_time; mae6.ipv6AddrRetransmitTime = ill->ill_reachable_retrans_time; if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&mae6, (int)mae6_size)) { ip1dbg(("ip_snmp_get_mib2_ip6_addr: failed to " "allocate %u bytes\n", (uint_t)mae6_size)); } } } rw_exit(&ipst->ips_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, ip_stack_t *ipst) { 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(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { /* Make sure the ill isn't going away. */ if (!ill_check_and_refhold(ill)) continue; rw_exit(&ipst->ips_ill_g_lock); rw_enter(&ill->ill_mcast_lock, RW_READER); for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { if (ilm->ilm_zoneid != zoneid && ilm->ilm_zoneid != ALL_ZONES) continue; /* Is there an ipif for ilm_ifaddr? */ for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (!IPIF_IS_CONDEMNED(ipif) && ipif->ipif_lcl_addr == ilm->ilm_ifaddr && ilm->ilm_ifaddr != INADDR_ANY) break; } if (ipif != NULL) { ipif_get_name(ipif, ipm.ipGroupMemberIfIndex.o_bytes, OCTET_LENGTH); } else { ill_get_name(ill, ipm.ipGroupMemberIfIndex.o_bytes, OCTET_LENGTH); } ipm.ipGroupMemberIfIndex.o_length = mi_strlen(ipm.ipGroupMemberIfIndex.o_bytes); 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))); } } rw_exit(&ill->ill_mcast_lock); ill_refrele(ill); rw_enter(&ipst->ips_ill_g_lock, RW_READER); } rw_exit(&ipst->ips_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, ip_stack_t *ipst) { 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(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { /* Make sure the ill isn't going away. */ if (!ill_check_and_refhold(ill)) continue; rw_exit(&ipst->ips_ill_g_lock); /* * Normally we don't have any members on under IPMP interfaces. * We report them as a debugging aid. */ rw_enter(&ill->ill_mcast_lock, RW_READER); ipm6.ipv6GroupMemberIfIndex = ill->ill_phyint->phyint_ifindex; for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { if (ilm->ilm_zoneid != zoneid && ilm->ilm_zoneid != ALL_ZONES) 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))); } } rw_exit(&ill->ill_mcast_lock); ill_refrele(ill); rw_enter(&ipst->ips_ill_g_lock, RW_READER); } rw_exit(&ipst->ips_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, ip_stack_t *ipst) { 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(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { /* Make sure the ill isn't going away. */ if (!ill_check_and_refhold(ill)) continue; rw_exit(&ipst->ips_ill_g_lock); rw_enter(&ill->ill_mcast_lock, RW_READER); for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { sl = ilm->ilm_filter; if (ilm->ilm_zoneid != zoneid && ilm->ilm_zoneid != ALL_ZONES) continue; if (SLIST_IS_EMPTY(sl)) continue; /* Is there an ipif for ilm_ifaddr? */ for (ipif = ill->ill_ipif; ipif != NULL; ipif = ipif->ipif_next) { if (!IPIF_IS_CONDEMNED(ipif) && ipif->ipif_lcl_addr == ilm->ilm_ifaddr && ilm->ilm_ifaddr != INADDR_ANY) break; } if (ipif != NULL) { ipif_get_name(ipif, ips.ipGroupSourceIfIndex.o_bytes, OCTET_LENGTH); } else { ill_get_name(ill, ips.ipGroupSourceIfIndex.o_bytes, OCTET_LENGTH); } ips.ipGroupSourceIfIndex.o_length = mi_strlen(ips.ipGroupSourceIfIndex.o_bytes); 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))); } } } rw_exit(&ill->ill_mcast_lock); ill_refrele(ill); rw_enter(&ipst->ips_ill_g_lock, RW_READER); } rw_exit(&ipst->ips_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, ip_stack_t *ipst) { 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(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { /* Make sure the ill isn't going away. */ if (!ill_check_and_refhold(ill)) continue; rw_exit(&ipst->ips_ill_g_lock); /* * Normally we don't have any members on under IPMP interfaces. * We report them as a debugging aid. */ rw_enter(&ill->ill_mcast_lock, RW_READER); ips6.ipv6GroupSourceIfIndex = ill->ill_phyint->phyint_ifindex; for (ilm = ill->ill_ilm; ilm; ilm = ilm->ilm_next) { sl = ilm->ilm_filter; if (ilm->ilm_zoneid != zoneid && ilm->ilm_zoneid != ALL_ZONES) continue; if (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))); } } } rw_exit(&ill->ill_mcast_lock); ill_refrele(ill); rw_enter(&ipst->ips_ill_g_lock, RW_READER); } rw_exit(&ipst->ips_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, ip_stack_t *ipst) { 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, ipst)) { 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, ip_stack_t *ipst) { 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, ipst)) { 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, int level, ip_stack_t *ipst) { 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; /* * If the level has been set the special EXPER_IP_AND_ALL_IRES value, * then also include ire_testhidden IREs and IRE_IF_CLONE. This is * intended a temporary solution until a proper MIB API is provided * that provides complete filtering/caller-opt-in. */ if (level == EXPER_IP_AND_ALL_IRES) ird.ird_flags |= IRD_REPORT_ALL; zoneid = Q_TO_CONN(q)->conn_zoneid; ire_walk_v4(ip_snmp_get2_v4, &ird, zoneid, ipst); /* 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 */ ncec_walk(NULL, ip_snmp_get2_v4_media, &ird, ipst); 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, int level, ip_stack_t *ipst) { 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; /* * If the level has been set the special EXPER_IP_AND_ALL_IRES value, * then also include ire_testhidden IREs and IRE_IF_CLONE. This is * intended a temporary solution until a proper MIB API is provided * that provides complete filtering/caller-opt-in. */ if (level == EXPER_IP_AND_ALL_IRES) ird.ird_flags |= IRD_REPORT_ALL; zoneid = Q_TO_CONN(q)->conn_zoneid; ire_walk_v6(ip_snmp_get2_v6_route, &ird, zoneid, ipst); 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 */ ncec_walk(NULL, ip_snmp_get2_v6_media, &ird, ipst); 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); } /* * IPv6 mib: One per ill */ static mblk_t * ip_snmp_get_mib2_ip6(queue_t *q, mblk_t *mpctl, ip_stack_t *ipst, boolean_t legacy_req) { struct opthdr *optp; mblk_t *mp2ctl; ill_t *ill; ill_walk_context_t ctx; mblk_t *mp_tail = NULL; mib2_ipv6AddrEntry_t mae6; mib2_ipIfStatsEntry_t *ise; size_t ise_size, iae_size; /* * Make a copy of the original message */ mp2ctl = copymsg(mpctl); /* fixed length IPv6 structure ... */ if (legacy_req) { ise_size = LEGACY_MIB_SIZE(&ipst->ips_ip6_mib, mib2_ipIfStatsEntry_t); iae_size = LEGACY_MIB_SIZE(&mae6, mib2_ipv6AddrEntry_t); } else { ise_size = sizeof (mib2_ipIfStatsEntry_t); iae_size = sizeof (mib2_ipv6AddrEntry_t); } optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_IP6; optp->name = 0; /* Include "unknown interface" ip6_mib */ ipst->ips_ip6_mib.ipIfStatsIPVersion = MIB2_INETADDRESSTYPE_ipv6; ipst->ips_ip6_mib.ipIfStatsIfIndex = MIB2_UNKNOWN_INTERFACE; /* Flag to netstat */ SET_MIB(ipst->ips_ip6_mib.ipIfStatsForwarding, ipst->ips_ipv6_forwarding ? 1 : 2); SET_MIB(ipst->ips_ip6_mib.ipIfStatsDefaultHopLimit, ipst->ips_ipv6_def_hops); SET_MIB(ipst->ips_ip6_mib.ipIfStatsEntrySize, sizeof (mib2_ipIfStatsEntry_t)); SET_MIB(ipst->ips_ip6_mib.ipIfStatsAddrEntrySize, sizeof (mib2_ipv6AddrEntry_t)); SET_MIB(ipst->ips_ip6_mib.ipIfStatsRouteEntrySize, sizeof (mib2_ipv6RouteEntry_t)); SET_MIB(ipst->ips_ip6_mib.ipIfStatsNetToMediaEntrySize, sizeof (mib2_ipv6NetToMediaEntry_t)); SET_MIB(ipst->ips_ip6_mib.ipIfStatsMemberEntrySize, sizeof (ipv6_member_t)); SET_MIB(ipst->ips_ip6_mib.ipIfStatsGroupSourceEntrySize, sizeof (ipv6_grpsrc_t)); /* * Synchronize 64- and 32-bit counters */ SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInReceives, ipIfStatsHCInReceives); SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInDelivers, ipIfStatsHCInDelivers); SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutRequests, ipIfStatsHCOutRequests); SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutForwDatagrams, ipIfStatsHCOutForwDatagrams); SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsOutMcastPkts, ipIfStatsHCOutMcastPkts); SYNC32_MIB(&ipst->ips_ip6_mib, ipIfStatsInMcastPkts, ipIfStatsHCInMcastPkts); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&ipst->ips_ip6_mib, (int)ise_size)) { ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate %u bytes\n", (uint_t)ise_size)); } else if (legacy_req) { /* Adjust the EntrySize fields for legacy requests. */ ise = (mib2_ipIfStatsEntry_t *)(mp_tail->b_wptr - (int)ise_size); SET_MIB(ise->ipIfStatsEntrySize, ise_size); SET_MIB(ise->ipIfStatsAddrEntrySize, iae_size); } rw_enter(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ill->ill_ip_mib->ipIfStatsIfIndex = ill->ill_phyint->phyint_ifindex; SET_MIB(ill->ill_ip_mib->ipIfStatsForwarding, ipst->ips_ipv6_forwarding ? 1 : 2); SET_MIB(ill->ill_ip_mib->ipIfStatsDefaultHopLimit, ill->ill_max_hops); /* * Synchronize 64- and 32-bit counters */ SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInReceives, ipIfStatsHCInReceives); SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInDelivers, ipIfStatsHCInDelivers); SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutRequests, ipIfStatsHCOutRequests); SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutForwDatagrams, ipIfStatsHCOutForwDatagrams); SYNC32_MIB(ill->ill_ip_mib, ipIfStatsOutMcastPkts, ipIfStatsHCOutMcastPkts); SYNC32_MIB(ill->ill_ip_mib, ipIfStatsInMcastPkts, ipIfStatsHCInMcastPkts); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)ill->ill_ip_mib, (int)ise_size)) { ip1dbg(("ip_snmp_get_mib2_ip6: failed to allocate " "%u bytes\n", (uint_t)ise_size)); } else if (legacy_req) { /* Adjust the EntrySize fields for legacy requests. */ ise = (mib2_ipIfStatsEntry_t *)(mp_tail->b_wptr - (int)ise_size); SET_MIB(ise->ipIfStatsEntrySize, ise_size); SET_MIB(ise->ipIfStatsAddrEntrySize, iae_size); } } rw_exit(&ipst->ips_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, ip_stack_t *ipst) { 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 */ ipst->ips_icmp6_mib.ipv6IfIcmpIfIndex = MIB2_UNKNOWN_INTERFACE; /* netstat flag */ ipst->ips_icmp6_mib.ipv6IfIcmpEntrySize = sizeof (mib2_ipv6IfIcmpEntry_t); if (!snmp_append_data2(mpctl->b_cont, &mp_tail, (char *)&ipst->ips_icmp6_mib, (int)sizeof (ipst->ips_icmp6_mib))) { ip1dbg(("ip_snmp_get_mib2_icmp6: failed to allocate %u bytes\n", (uint_t)sizeof (ipst->ips_icmp6_mib))); } rw_enter(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V6(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) { ill->ill_icmp6_mib->ipv6IfIcmpIfIndex = ill->ill_phyint->phyint_ifindex; 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(&ipst->ips_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; mib2_ipRouteEntry_t *re; mib2_ipAttributeEntry_t iaes; tsol_ire_gw_secattr_t *attrp; tsol_gc_t *gc = NULL; tsol_gcgrp_t *gcgrp = NULL; ip_stack_t *ipst = ire->ire_ipst; ASSERT(ire->ire_ipversion == IPV4_VERSION); if (!(ird->ird_flags & IRD_REPORT_ALL)) { if (ire->ire_testhidden) return; if (ire->ire_type & IRE_IF_CLONE) return; } 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); } mutex_exit(&attrp->igsa_lock); } /* * Return all IRE types for route table... let caller pick and choose */ re->ipRouteDest = ire->ire_addr; ill = ire->ire_ill; re->ipRouteIfIndex.o_length = 0; if (ill != NULL) { ill_get_name(ill, 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; re->ipRouteNextHop = ire->ire_gateway_addr; /* indirect(4), direct(3), or invalid(2) */ if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) re->ipRouteType = 2; else if (ire->ire_type & IRE_ONLINK) re->ipRouteType = 3; else re->ipRouteType = 4; 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_metrics.iulp_mtu; if (ire->ire_ill != NULL && re->ipRouteInfo.re_max_frag == 0) re->ipRouteInfo.re_max_frag = ire->ire_ill->ill_mtu; re->ipRouteInfo.re_frag_flag = 0; re->ipRouteInfo.re_rtt = 0; re->ipRouteInfo.re_src_addr = 0; re->ipRouteInfo.re_ref = ire->ire_refcnt; 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; /* Add the IRE_IF_CLONE's counters to their parent IRE_INTERFACE */ if (ire->ire_type & IRE_INTERFACE) { ire_t *child; rw_enter(&ipst->ips_ire_dep_lock, RW_READER); child = ire->ire_dep_children; while (child != NULL) { re->ipRouteInfo.re_obpkt += child->ire_ob_pkt_count; re->ipRouteInfo.re_ibpkt += child->ire_ib_pkt_count; child = child->ire_dep_sib_next; } rw_exit(&ipst->ips_ire_dep_lock); } if (ire->ire_flags & RTF_DYNAMIC) { re->ipRouteInfo.re_ire_type = IRE_HOST_REDIRECT; } else { re->ipRouteInfo.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_v4: failed to allocate %u bytes\n", (uint_t)sizeof (*re))); } if (gc != NULL) { iaes.iae_routeidx = ird->ird_idx; iaes.iae_doi = gc->gc_db->gcdb_doi; iaes.iae_slrange = gc->gc_db->gcdb_slrange; if (!snmp_append_data2(ird->ird_attrs.lp_head, &ird->ird_attrs.lp_tail, (char *)&iaes, sizeof (iaes))) { ip1dbg(("ip_snmp_get2_v4: failed to allocate %u " "bytes\n", (uint_t)sizeof (iaes))); } } /* bump route index for next pass */ ird->ird_idx++; kmem_free(re, sizeof (*re)); 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; mib2_ipv6RouteEntry_t *re; mib2_ipAttributeEntry_t iaes; tsol_ire_gw_secattr_t *attrp; tsol_gc_t *gc = NULL; tsol_gcgrp_t *gcgrp = NULL; ip_stack_t *ipst = ire->ire_ipst; ASSERT(ire->ire_ipversion == IPV6_VERSION); if (!(ird->ird_flags & IRD_REPORT_ALL)) { if (ire->ire_testhidden) return; if (ire->ire_type & IRE_IF_CLONE) return; } 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); } mutex_exit(&attrp->igsa_lock); } /* * 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; ill = ire->ire_ill; if (ill != NULL) { ill_get_name(ill, 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); re->ipv6RouteNextHop = ire->ire_gateway_addr_v6; mutex_exit(&ire->ire_lock); /* remote(4), local(3), or discard(2) */ if (ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) re->ipv6RouteType = 2; else if (ire->ire_type & IRE_ONLINK) 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_metrics.iulp_mtu; if (ire->ire_ill != NULL && re->ipv6RouteInfo.re_max_frag == 0) re->ipv6RouteInfo.re_max_frag = ire->ire_ill->ill_mtu; re->ipv6RouteInfo.re_frag_flag = 0; re->ipv6RouteInfo.re_rtt = 0; re->ipv6RouteInfo.re_src_addr = ipv6_all_zeros; 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; /* Add the IRE_IF_CLONE's counters to their parent IRE_INTERFACE */ if (ire->ire_type & IRE_INTERFACE) { ire_t *child; rw_enter(&ipst->ips_ire_dep_lock, RW_READER); child = ire->ire_dep_children; while (child != NULL) { re->ipv6RouteInfo.re_obpkt += child->ire_ob_pkt_count; re->ipv6RouteInfo.re_ibpkt += child->ire_ib_pkt_count; child = child->ire_dep_sib_next; } rw_exit(&ipst->ips_ire_dep_lock); } 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))); } if (gc != NULL) { iaes.iae_routeidx = ird->ird_idx; iaes.iae_doi = gc->gc_db->gcdb_doi; iaes.iae_slrange = gc->gc_db->gcdb_slrange; if (!snmp_append_data2(ird->ird_attrs.lp_head, &ird->ird_attrs.lp_tail, (char *)&iaes, sizeof (iaes))) { ip1dbg(("ip_snmp_get2_v6: failed to allocate %u " "bytes\n", (uint_t)sizeof (iaes))); } } /* bump route index for next pass */ ird->ird_idx++; kmem_free(re, sizeof (*re)); if (gcgrp != NULL) rw_exit(&gcgrp->gcgrp_rwlock); } /* * ncec_walk routine to create ipv6NetToMediaEntryTable */ static int ip_snmp_get2_v6_media(ncec_t *ncec, iproutedata_t *ird) { ill_t *ill; mib2_ipv6NetToMediaEntry_t ntme; ill = ncec->ncec_ill; /* skip arpce entries, and loopback ncec entries */ if (ill->ill_isv6 == B_FALSE || ill->ill_net_type == IRE_LOOPBACK) return (0); /* * Neighbor cache entry attached to IRE with on-link * destination. * We report all IPMP groups on ncec_ill which is normally the upper. */ ntme.ipv6NetToMediaIfIndex = ill->ill_phyint->phyint_ifindex; ntme.ipv6NetToMediaNetAddress = ncec->ncec_addr; ntme.ipv6NetToMediaPhysAddress.o_length = ill->ill_phys_addr_length; if (ncec->ncec_lladdr != NULL) { bcopy(ncec->ncec_lladdr, ntme.ipv6NetToMediaPhysAddress.o_bytes, ntme.ipv6NetToMediaPhysAddress.o_length); } /* * Note: Returns ND_* states. Should be: * reachable(1), stale(2), delay(3), probe(4), * invalid(5), unknown(6) */ ntme.ipv6NetToMediaState = ncec->ncec_state; ntme.ipv6NetToMediaLastUpdated = 0; /* other(1), dynamic(2), static(3), local(4) */ if (NCE_MYADDR(ncec)) { ntme.ipv6NetToMediaType = 4; } else if (ncec->ncec_flags & NCE_F_PUBLISH) { ntme.ipv6NetToMediaType = 1; /* proxy */ } else if (ncec->ncec_flags & NCE_F_STATIC) { ntme.ipv6NetToMediaType = 3; } else if (ncec->ncec_flags & (NCE_F_MCAST|NCE_F_BCAST)) { 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); } int nce2ace(ncec_t *ncec) { int flags = 0; if (NCE_ISREACHABLE(ncec)) flags |= ACE_F_RESOLVED; if (ncec->ncec_flags & NCE_F_AUTHORITY) flags |= ACE_F_AUTHORITY; if (ncec->ncec_flags & NCE_F_PUBLISH) flags |= ACE_F_PUBLISH; if ((ncec->ncec_flags & NCE_F_NONUD) != 0) flags |= ACE_F_PERMANENT; if (NCE_MYADDR(ncec)) flags |= (ACE_F_MYADDR | ACE_F_AUTHORITY); if (ncec->ncec_flags & NCE_F_UNVERIFIED) flags |= ACE_F_UNVERIFIED; if (ncec->ncec_flags & NCE_F_AUTHORITY) flags |= ACE_F_AUTHORITY; if (ncec->ncec_flags & NCE_F_DELAYED) flags |= ACE_F_DELAYED; return (flags); } /* * ncec_walk routine to create ipNetToMediaEntryTable */ static int ip_snmp_get2_v4_media(ncec_t *ncec, iproutedata_t *ird) { ill_t *ill; mib2_ipNetToMediaEntry_t ntme; const char *name = "unknown"; ipaddr_t ncec_addr; ill = ncec->ncec_ill; if (ill->ill_isv6 || (ncec->ncec_flags & NCE_F_BCAST) || ill->ill_net_type == IRE_LOOPBACK) return (0); /* We report all IPMP groups on ncec_ill which is normally the upper. */ name = ill->ill_name; /* Based on RFC 4293: other(1), inval(2), dyn(3), stat(4) */ if (NCE_MYADDR(ncec)) { ntme.ipNetToMediaType = 4; } else if (ncec->ncec_flags & (NCE_F_MCAST|NCE_F_BCAST|NCE_F_PUBLISH)) { ntme.ipNetToMediaType = 1; } else { ntme.ipNetToMediaType = 3; } ntme.ipNetToMediaIfIndex.o_length = MIN(OCTET_LENGTH, strlen(name)); bcopy(name, ntme.ipNetToMediaIfIndex.o_bytes, ntme.ipNetToMediaIfIndex.o_length); IN6_V4MAPPED_TO_IPADDR(&ncec->ncec_addr, ncec_addr); bcopy(&ncec_addr, &ntme.ipNetToMediaNetAddress, sizeof (ncec_addr)); ntme.ipNetToMediaInfo.ntm_mask.o_length = sizeof (ipaddr_t); ncec_addr = INADDR_BROADCAST; bcopy(&ncec_addr, ntme.ipNetToMediaInfo.ntm_mask.o_bytes, sizeof (ncec_addr)); /* * map all the flags to the ACE counterpart. */ ntme.ipNetToMediaInfo.ntm_flags = nce2ace(ncec); ntme.ipNetToMediaPhysAddress.o_length = MIN(OCTET_LENGTH, ill->ill_phys_addr_length); if (!NCE_ISREACHABLE(ncec)) ntme.ipNetToMediaPhysAddress.o_length = 0; else { if (ncec->ncec_lladdr != NULL) { bcopy(ncec->ncec_lladdr, ntme.ipNetToMediaPhysAddress.o_bytes, ntme.ipNetToMediaPhysAddress.o_length); } } if (!snmp_append_data2(ird->ird_netmedia.lp_head, &ird->ird_netmedia.lp_tail, (char *)&ntme, sizeof (ntme))) { ip1dbg(("ip_snmp_get2_v4_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); } } /* * When there exists both a 64- and 32-bit counter of a particular type * (i.e., InReceives), only the 64-bit counters are added. */ void ip_mib2_add_ip_stats(mib2_ipIfStatsEntry_t *o1, mib2_ipIfStatsEntry_t *o2) { UPDATE_MIB(o1, ipIfStatsInHdrErrors, o2->ipIfStatsInHdrErrors); UPDATE_MIB(o1, ipIfStatsInTooBigErrors, o2->ipIfStatsInTooBigErrors); UPDATE_MIB(o1, ipIfStatsInNoRoutes, o2->ipIfStatsInNoRoutes); UPDATE_MIB(o1, ipIfStatsInAddrErrors, o2->ipIfStatsInAddrErrors); UPDATE_MIB(o1, ipIfStatsInUnknownProtos, o2->ipIfStatsInUnknownProtos); UPDATE_MIB(o1, ipIfStatsInTruncatedPkts, o2->ipIfStatsInTruncatedPkts); UPDATE_MIB(o1, ipIfStatsInDiscards, o2->ipIfStatsInDiscards); UPDATE_MIB(o1, ipIfStatsOutDiscards, o2->ipIfStatsOutDiscards); UPDATE_MIB(o1, ipIfStatsOutFragOKs, o2->ipIfStatsOutFragOKs); UPDATE_MIB(o1, ipIfStatsOutFragFails, o2->ipIfStatsOutFragFails); UPDATE_MIB(o1, ipIfStatsOutFragCreates, o2->ipIfStatsOutFragCreates); UPDATE_MIB(o1, ipIfStatsReasmReqds, o2->ipIfStatsReasmReqds); UPDATE_MIB(o1, ipIfStatsReasmOKs, o2->ipIfStatsReasmOKs); UPDATE_MIB(o1, ipIfStatsReasmFails, o2->ipIfStatsReasmFails); UPDATE_MIB(o1, ipIfStatsOutNoRoutes, o2->ipIfStatsOutNoRoutes); UPDATE_MIB(o1, ipIfStatsReasmDuplicates, o2->ipIfStatsReasmDuplicates); UPDATE_MIB(o1, ipIfStatsReasmPartDups, o2->ipIfStatsReasmPartDups); UPDATE_MIB(o1, ipIfStatsForwProhibits, o2->ipIfStatsForwProhibits); UPDATE_MIB(o1, udpInCksumErrs, o2->udpInCksumErrs); UPDATE_MIB(o1, udpInOverflows, o2->udpInOverflows); UPDATE_MIB(o1, rawipInOverflows, o2->rawipInOverflows); UPDATE_MIB(o1, ipIfStatsInWrongIPVersion, o2->ipIfStatsInWrongIPVersion); UPDATE_MIB(o1, ipIfStatsOutWrongIPVersion, o2->ipIfStatsInWrongIPVersion); UPDATE_MIB(o1, ipIfStatsOutSwitchIPVersion, o2->ipIfStatsOutSwitchIPVersion); UPDATE_MIB(o1, ipIfStatsHCInReceives, o2->ipIfStatsHCInReceives); UPDATE_MIB(o1, ipIfStatsHCInOctets, o2->ipIfStatsHCInOctets); UPDATE_MIB(o1, ipIfStatsHCInForwDatagrams, o2->ipIfStatsHCInForwDatagrams); UPDATE_MIB(o1, ipIfStatsHCInDelivers, o2->ipIfStatsHCInDelivers); UPDATE_MIB(o1, ipIfStatsHCOutRequests, o2->ipIfStatsHCOutRequests); UPDATE_MIB(o1, ipIfStatsHCOutForwDatagrams, o2->ipIfStatsHCOutForwDatagrams); UPDATE_MIB(o1, ipIfStatsOutFragReqds, o2->ipIfStatsOutFragReqds); UPDATE_MIB(o1, ipIfStatsHCOutTransmits, o2->ipIfStatsHCOutTransmits); UPDATE_MIB(o1, ipIfStatsHCOutOctets, o2->ipIfStatsHCOutOctets); UPDATE_MIB(o1, ipIfStatsHCInMcastPkts, o2->ipIfStatsHCInMcastPkts); UPDATE_MIB(o1, ipIfStatsHCInMcastOctets, o2->ipIfStatsHCInMcastOctets); UPDATE_MIB(o1, ipIfStatsHCOutMcastPkts, o2->ipIfStatsHCOutMcastPkts); UPDATE_MIB(o1, ipIfStatsHCOutMcastOctets, o2->ipIfStatsHCOutMcastOctets); UPDATE_MIB(o1, ipIfStatsHCInBcastPkts, o2->ipIfStatsHCInBcastPkts); UPDATE_MIB(o1, ipIfStatsHCOutBcastPkts, o2->ipIfStatsHCOutBcastPkts); UPDATE_MIB(o1, ipsecInSucceeded, o2->ipsecInSucceeded); UPDATE_MIB(o1, ipsecInFailed, o2->ipsecInFailed); UPDATE_MIB(o1, ipInCksumErrs, o2->ipInCksumErrs); UPDATE_MIB(o1, tcpInErrs, o2->tcpInErrs); UPDATE_MIB(o1, udpNoPorts, o2->udpNoPorts); } void ip_mib2_add_icmp6_stats(mib2_ipv6IfIcmpEntry_t *o1, mib2_ipv6IfIcmpEntry_t *o2) { UPDATE_MIB(o1, ipv6IfIcmpInMsgs, o2->ipv6IfIcmpInMsgs); UPDATE_MIB(o1, ipv6IfIcmpInErrors, o2->ipv6IfIcmpInErrors); UPDATE_MIB(o1, ipv6IfIcmpInDestUnreachs, o2->ipv6IfIcmpInDestUnreachs); UPDATE_MIB(o1, ipv6IfIcmpInAdminProhibs, o2->ipv6IfIcmpInAdminProhibs); UPDATE_MIB(o1, ipv6IfIcmpInTimeExcds, o2->ipv6IfIcmpInTimeExcds); UPDATE_MIB(o1, ipv6IfIcmpInParmProblems, o2->ipv6IfIcmpInParmProblems); UPDATE_MIB(o1, ipv6IfIcmpInPktTooBigs, o2->ipv6IfIcmpInPktTooBigs); UPDATE_MIB(o1, ipv6IfIcmpInEchos, o2->ipv6IfIcmpInEchos); UPDATE_MIB(o1, ipv6IfIcmpInEchoReplies, o2->ipv6IfIcmpInEchoReplies); UPDATE_MIB(o1, ipv6IfIcmpInRouterSolicits, o2->ipv6IfIcmpInRouterSolicits); UPDATE_MIB(o1, ipv6IfIcmpInRouterAdvertisements, o2->ipv6IfIcmpInRouterAdvertisements); UPDATE_MIB(o1, ipv6IfIcmpInNeighborSolicits, o2->ipv6IfIcmpInNeighborSolicits); UPDATE_MIB(o1, ipv6IfIcmpInNeighborAdvertisements, o2->ipv6IfIcmpInNeighborAdvertisements); UPDATE_MIB(o1, ipv6IfIcmpInRedirects, o2->ipv6IfIcmpInRedirects); UPDATE_MIB(o1, ipv6IfIcmpInGroupMembQueries, o2->ipv6IfIcmpInGroupMembQueries); UPDATE_MIB(o1, ipv6IfIcmpInGroupMembResponses, o2->ipv6IfIcmpInGroupMembResponses); UPDATE_MIB(o1, ipv6IfIcmpInGroupMembReductions, o2->ipv6IfIcmpInGroupMembReductions); UPDATE_MIB(o1, ipv6IfIcmpOutMsgs, o2->ipv6IfIcmpOutMsgs); UPDATE_MIB(o1, ipv6IfIcmpOutErrors, o2->ipv6IfIcmpOutErrors); UPDATE_MIB(o1, ipv6IfIcmpOutDestUnreachs, o2->ipv6IfIcmpOutDestUnreachs); UPDATE_MIB(o1, ipv6IfIcmpOutAdminProhibs, o2->ipv6IfIcmpOutAdminProhibs); UPDATE_MIB(o1, ipv6IfIcmpOutTimeExcds, o2->ipv6IfIcmpOutTimeExcds); UPDATE_MIB(o1, ipv6IfIcmpOutParmProblems, o2->ipv6IfIcmpOutParmProblems); UPDATE_MIB(o1, ipv6IfIcmpOutPktTooBigs, o2->ipv6IfIcmpOutPktTooBigs); UPDATE_MIB(o1, ipv6IfIcmpOutEchos, o2->ipv6IfIcmpOutEchos); UPDATE_MIB(o1, ipv6IfIcmpOutEchoReplies, o2->ipv6IfIcmpOutEchoReplies); UPDATE_MIB(o1, ipv6IfIcmpOutRouterSolicits, o2->ipv6IfIcmpOutRouterSolicits); UPDATE_MIB(o1, ipv6IfIcmpOutRouterAdvertisements, o2->ipv6IfIcmpOutRouterAdvertisements); UPDATE_MIB(o1, ipv6IfIcmpOutNeighborSolicits, o2->ipv6IfIcmpOutNeighborSolicits); UPDATE_MIB(o1, ipv6IfIcmpOutNeighborAdvertisements, o2->ipv6IfIcmpOutNeighborAdvertisements); UPDATE_MIB(o1, ipv6IfIcmpOutRedirects, o2->ipv6IfIcmpOutRedirects); UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembQueries, o2->ipv6IfIcmpOutGroupMembQueries); UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembResponses, o2->ipv6IfIcmpOutGroupMembResponses); UPDATE_MIB(o1, ipv6IfIcmpOutGroupMembReductions, o2->ipv6IfIcmpOutGroupMembReductions); UPDATE_MIB(o1, ipv6IfIcmpInOverflows, o2->ipv6IfIcmpInOverflows); UPDATE_MIB(o1, ipv6IfIcmpBadHoplimit, o2->ipv6IfIcmpBadHoplimit); UPDATE_MIB(o1, ipv6IfIcmpInBadNeighborAdvertisements, o2->ipv6IfIcmpInBadNeighborAdvertisements); UPDATE_MIB(o1, ipv6IfIcmpInBadNeighborSolicitations, o2->ipv6IfIcmpInBadNeighborSolicitations); UPDATE_MIB(o1, ipv6IfIcmpInBadRedirects, o2->ipv6IfIcmpInBadRedirects); UPDATE_MIB(o1, ipv6IfIcmpInGroupMembTotal, o2->ipv6IfIcmpInGroupMembTotal); UPDATE_MIB(o1, ipv6IfIcmpInGroupMembBadQueries, o2->ipv6IfIcmpInGroupMembBadQueries); UPDATE_MIB(o1, ipv6IfIcmpInGroupMembBadReports, o2->ipv6IfIcmpInGroupMembBadReports); UPDATE_MIB(o1, ipv6IfIcmpInGroupMembOurReports, o2->ipv6IfIcmpInGroupMembOurReports); } /* * 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. */ boolean_t ip_source_routed(ipha_t *ipha, ip_stack_t *ipst) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; 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). */ if (ip_type_v4(dst, ipst) != IRE_LOCAL) { ip2dbg(("ip_source_routed: not next" " source route 0x%x\n", ntohl(dst))); return (B_FALSE); } 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); } /* * ip_unbind is called by the transports to remove a conn from * the fanout table. */ void ip_unbind(conn_t *connp) { 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_proto, ntohs(connp->conn_lport), B_FALSE); connp->conn_anon_port = 0; } connp->conn_mlp_type = mlptSingle; ipcl_hash_remove(connp); } /* * 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 (connp->conn_ixa->ixa_ipsec_policy == NULL) return (0); return (connp->conn_ixa->ixa_ipsec_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(ip_xmit_attr_t *ixa) { ipsec_action_t *a; if (!(ixa->ixa_flags & IXAF_IPSEC_SECURE)) return (0); a = ixa->ixa_ipsec_action; if (a == NULL) { ASSERT(ixa->ixa_ipsec_policy != NULL); a = ixa->ixa_ipsec_policy->ipsp_act; } ASSERT(a != NULL); return (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); } /* * Outbound IP fragmentation routine. * Assumes the caller has checked whether or not fragmentation should * be allowed. Here we copy the DF bit from the header to all the generated * fragments. */ int ip_fragment_v4(mblk_t *mp_orig, nce_t *nce, iaflags_t ixaflags, uint_t pkt_len, uint32_t max_frag, uint32_t xmit_hint, zoneid_t szone, zoneid_t nolzid, pfirepostfrag_t postfragfn, uintptr_t *ixa_cookie) { int i1; int hdr_len; mblk_t *hdr_mp; ipha_t *ipha; int ip_data_end; int len; mblk_t *mp = mp_orig; int offset; ill_t *ill = nce->nce_ill; ip_stack_t *ipst = ill->ill_ipst; mblk_t *carve_mp; uint32_t frag_flag; uint_t priority = mp->b_band; int error = 0; BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragReqds); if (pkt_len != msgdsize(mp)) { ip0dbg(("Packet length mismatch: %d, %ld\n", pkt_len, msgdsize(mp))); freemsg(mp); return (EINVAL); } if (max_frag == 0) { ip1dbg(("ip_fragment_v4: max_frag is zero. Dropping packet\n")); BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails); ip_drop_output("FragFails: zero max_frag", mp, ill); freemsg(mp); return (EINVAL); } ASSERT(MBLKL(mp) >= sizeof (ipha_t)); ipha = (ipha_t *)mp->b_rptr; ASSERT(ntohs(ipha->ipha_length) == pkt_len); frag_flag = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_DF; /* * Establish the starting offset. May not be zero if we are fragging * a fragment that is being forwarded. */ offset = ntohs(ipha->ipha_fragment_offset_and_flags) & IPH_OFFSET; /* TODO why is this test needed? */ if (((max_frag - ntohs(ipha->ipha_length)) & ~7) < 8) { /* TODO: notify ulp somehow */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails); ip_drop_output("FragFails: bad starting offset", mp, ill); freemsg(mp); return (EINVAL); } hdr_len = IPH_HDR_LENGTH(ipha); ipha->ipha_hdr_checksum = 0; /* * Establish the number of bytes maximum per frag, after putting * in the header. */ len = (max_frag - hdr_len) & ~7; /* Get a copy of the header for the trailing frags */ hdr_mp = ip_fragment_copyhdr((uchar_t *)ipha, hdr_len, offset, ipst, mp); if (hdr_mp == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails); ip_drop_output("FragFails: no hdr_mp", mp, ill); freemsg(mp); return (ENOBUFS); } /* 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(ill->ill_ip_mib, ipIfStatsOutFragFails); ip_drop_output("FragFails: could not carve mp", mp_orig, ill); freeb(hdr_mp); freemsg(mp_orig); return (ENOBUFS); } BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragCreates); error = postfragfn(mp, nce, ixaflags, i1, xmit_hint, szone, nolzid, ixa_cookie); if (error != 0 && error != EWOULDBLOCK) { /* No point in sending the other fragments */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails); ip_drop_output("FragFails: postfragfn failed", mp_orig, ill); freeb(hdr_mp); freemsg(mp_orig); return (error); } /* No need to redo state machine in loop */ ixaflags &= ~IXAF_REACH_CONF; /* 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 = priority; 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 = priority; 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); BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragCreates); error = postfragfn(mp, nce, ixaflags, ip_len, xmit_hint, szone, nolzid, ixa_cookie); /* All done if we just consumed the hdr_mp. */ if (mp == hdr_mp) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragOKs); return (error); } if (error != 0 && error != EWOULDBLOCK) { DTRACE_PROBE2(ip__xmit__frag__fail, ill_t *, ill, mblk_t *, hdr_mp); /* No point in sending the other fragments */ break; } /* Otherwise, advance and loop. */ offset += len; } /* Clean up following allocation failure. */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutFragFails); ip_drop_output("FragFails: loop ended", NULL, ill); if (mp != hdr_mp) freeb(hdr_mp); if (mp != mp_orig) freemsg(mp_orig); return (error); } /* * Copy the header plus those options which have the copy bit set */ static mblk_t * ip_fragment_copyhdr(uchar_t *rptr, int hdr_len, int offset, ip_stack_t *ipst, mblk_t *src) { mblk_t *mp; uchar_t *up; /* * Quick check if we need to look for options without the copy bit * set */ mp = allocb_tmpl(ipst->ips_ip_wroff_extra + hdr_len, src); if (!mp) return (mp); mp->b_rptr += ipst->ips_ip_wroff_extra; if (hdr_len == IP_SIMPLE_HDR_LENGTH || offset != 0) { bcopy(rptr, mp->b_rptr, hdr_len); mp->b_wptr += hdr_len + ipst->ips_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); } /* * Update any source route, record route, or timestamp options when * sending a packet back to ourselves. * Check that we are at end of strict source route. * The options have been sanity checked by ip_output_options(). */ void ip_output_local_options(ipha_t *ipha, ip_stack_t *ipst) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; uint32_t ts; timestruc_t now; 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 */ 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_output_local_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); if (ip_type_v4(dst, ipst) != IRE_LOCAL) { /* Not for us */ break; } /* 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_output_local_options: " "unknown IT - bug in ip_output_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 + NSEC2MSEC(now.tv_nsec); bcopy(&ts, (char *)opt + off, IPOPT_TS_TIMELEN); opt[IPOPT_OFFSET] += IPOPT_TS_TIMELEN; break; } break; } } } /* * Prepend an M_DATA fastpath header, and if none present prepend a * DL_UNITDATA_REQ. Frees the mblk on failure. * * nce_dlur_mp and nce_fp_mp can not disappear once they have been set. * If there is a change to them, the nce will be deleted (condemned) and * a new nce_t will be created when packets are sent. Thus we need no locks * to access those fields. * * We preserve b_band to support IPQoS. If a DL_UNITDATA_REQ is prepended * we place b_band in dl_priority.dl_max. */ static mblk_t * ip_xmit_attach_llhdr(mblk_t *mp, nce_t *nce) { uint_t hlen; mblk_t *mp1; uint_t priority; uchar_t *rptr; rptr = mp->b_rptr; ASSERT(DB_TYPE(mp) == M_DATA); priority = mp->b_band; ASSERT(nce != NULL); if ((mp1 = nce->nce_fp_mp) != NULL) { hlen = MBLKL(mp1); /* * Check if we have enough room to prepend fastpath * header */ if (hlen != 0 && (rptr - mp->b_datap->db_base) >= hlen) { rptr -= hlen; bcopy(mp1->b_rptr, rptr, hlen); /* * Set the b_rptr to the start of the link layer * header */ mp->b_rptr = rptr; return (mp); } mp1 = copyb(mp1); if (mp1 == NULL) { ill_t *ill = nce->nce_ill; BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); ip_drop_output("ipIfStatsOutDiscards", mp, ill); freemsg(mp); return (NULL); } mp1->b_band = priority; mp1->b_cont = mp; DB_CKSUMSTART(mp1) = DB_CKSUMSTART(mp); DB_CKSUMSTUFF(mp1) = DB_CKSUMSTUFF(mp); DB_CKSUMEND(mp1) = DB_CKSUMEND(mp); DB_CKSUMFLAGS(mp1) = DB_CKSUMFLAGS(mp); DB_LSOMSS(mp1) = DB_LSOMSS(mp); DTRACE_PROBE1(ip__xmit__copyb, (mblk_t *), mp1); /* * 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) */ return (mp1); } mp1 = copyb(nce->nce_dlur_mp); if (mp1 == NULL) { ill_t *ill = nce->nce_ill; BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); ip_drop_output("ipIfStatsOutDiscards", mp, ill); freemsg(mp); return (NULL); } mp1->b_cont = mp; if (priority != 0) { mp1->b_band = priority; ((dl_unitdata_req_t *)(mp1->b_rptr))->dl_priority.dl_max = priority; } return (mp1); } /* * 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_outbound() if it was processed * asynchronously. * * This is common to IPv4 and IPv6. */ int ip_output_post_ipsec(mblk_t *mp, ip_xmit_attr_t *ixa) { iaflags_t ixaflags = ixa->ixa_flags; uint_t pktlen; /* AH/ESP don't update ixa_pktlen when they modify the packet */ if (ixaflags & IXAF_IS_IPV4) { ipha_t *ipha = (ipha_t *)mp->b_rptr; ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION); pktlen = ntohs(ipha->ipha_length); } else { ip6_t *ip6h = (ip6_t *)mp->b_rptr; ASSERT(IPH_HDR_VERSION(mp->b_rptr) == IPV6_VERSION); pktlen = ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN; } /* * We release any hard reference on the SAs here to make * sure the SAs can be garbage collected. ipsr_sa has a soft reference * on the SAs. * If in the future we want the hard latching of the SAs in the * ip_xmit_attr_t then we should remove this. */ if (ixa->ixa_ipsec_esp_sa != NULL) { IPSA_REFRELE(ixa->ixa_ipsec_esp_sa); ixa->ixa_ipsec_esp_sa = NULL; } if (ixa->ixa_ipsec_ah_sa != NULL) { IPSA_REFRELE(ixa->ixa_ipsec_ah_sa); ixa->ixa_ipsec_ah_sa = NULL; } /* Do we need to fragment? */ if ((ixa->ixa_flags & IXAF_IPV6_ADD_FRAGHDR) || pktlen > ixa->ixa_fragsize) { if (ixaflags & IXAF_IS_IPV4) { ASSERT(!(ixa->ixa_flags & IXAF_IPV6_ADD_FRAGHDR)); /* * We check for the DF case in ipsec_out_process * hence this only handles the non-DF case. */ return (ip_fragment_v4(mp, ixa->ixa_nce, ixa->ixa_flags, pktlen, ixa->ixa_fragsize, ixa->ixa_xmit_hint, ixa->ixa_zoneid, ixa->ixa_no_loop_zoneid, ixa->ixa_postfragfn, &ixa->ixa_cookie)); } else { mp = ip_fraghdr_add_v6(mp, ixa->ixa_ident, ixa); if (mp == NULL) { /* MIB and ip_drop_output already done */ return (ENOMEM); } pktlen += sizeof (ip6_frag_t); if (pktlen > ixa->ixa_fragsize) { return (ip_fragment_v6(mp, ixa->ixa_nce, ixa->ixa_flags, pktlen, ixa->ixa_fragsize, ixa->ixa_xmit_hint, ixa->ixa_zoneid, ixa->ixa_no_loop_zoneid, ixa->ixa_postfragfn, &ixa->ixa_cookie)); } } } return ((ixa->ixa_postfragfn)(mp, ixa->ixa_nce, ixa->ixa_flags, pktlen, ixa->ixa_xmit_hint, ixa->ixa_zoneid, ixa->ixa_no_loop_zoneid, NULL)); } /* * Finish the inbound IPsec processing. This function is called from * ipsec_out_process() if the IPsec packet was processed * synchronously, or from {ah,esp}_kcf_callback_outbound() if it was processed * asynchronously. * * This is common to IPv4 and IPv6. */ void ip_input_post_ipsec(mblk_t *mp, ip_recv_attr_t *ira) { iaflags_t iraflags = ira->ira_flags; /* Length might have changed */ if (iraflags & IRAF_IS_IPV4) { ipha_t *ipha = (ipha_t *)mp->b_rptr; ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION); ira->ira_pktlen = ntohs(ipha->ipha_length); ira->ira_ip_hdr_length = IPH_HDR_LENGTH(ipha); ira->ira_protocol = ipha->ipha_protocol; ip_fanout_v4(mp, ipha, ira); } else { ip6_t *ip6h = (ip6_t *)mp->b_rptr; uint8_t *nexthdrp; ASSERT(IPH_HDR_VERSION(mp->b_rptr) == IPV6_VERSION); ira->ira_pktlen = ntohs(ip6h->ip6_plen) + IPV6_HDR_LEN; if (!ip_hdr_length_nexthdr_v6(mp, ip6h, &ira->ira_ip_hdr_length, &nexthdrp)) { /* Malformed packet */ BUMP_MIB(ira->ira_ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ipIfStatsInDiscards", mp, ira->ira_ill); freemsg(mp); return; } ira->ira_protocol = *nexthdrp; ip_fanout_v6(mp, ip6h, ira); } } /* * 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 ixa_ipsec_*_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 in ip_output_post_ipsec. */ static boolean_t ipsec_out_select_sa(mblk_t *mp, ip_xmit_attr_t *ixa) { boolean_t need_ah_acquire = B_FALSE, need_esp_acquire = B_FALSE; ipsec_policy_t *pp; ipsec_action_t *ap; ASSERT(ixa->ixa_flags & IXAF_IPSEC_SECURE); ASSERT((ixa->ixa_ipsec_policy != NULL) || (ixa->ixa_ipsec_action != NULL)); ap = ixa->ixa_ipsec_action; if (ap == NULL) { pp = ixa->ixa_ipsec_policy; ASSERT(pp != NULL); ap = pp->ipsp_act; ASSERT(ap != NULL); } /* * We have an action. now, let's select SA's. * A side effect of setting ixa_ipsec_*_sa is that it will * be cached in the conn_t. */ if (ap->ipa_want_esp) { if (ixa->ixa_ipsec_esp_sa == NULL) { need_esp_acquire = !ipsec_outbound_sa(mp, ixa, IPPROTO_ESP); } ASSERT(need_esp_acquire || ixa->ixa_ipsec_esp_sa != NULL); } if (ap->ipa_want_ah) { if (ixa->ixa_ipsec_ah_sa == NULL) { need_ah_acquire = !ipsec_outbound_sa(mp, ixa, IPPROTO_AH); } ASSERT(need_ah_acquire || ixa->ixa_ipsec_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 (ixa->ixa_ipsec_ah_sa != NULL) { IPSA_REFRELE(ixa->ixa_ipsec_ah_sa); ixa->ixa_ipsec_ah_sa = NULL; } if (ixa->ixa_ipsec_esp_sa != NULL) { IPSA_REFRELE(ixa->ixa_ipsec_esp_sa); ixa->ixa_ipsec_esp_sa = NULL; } sadb_acquire(mp, ixa, need_ah_acquire, need_esp_acquire); return (B_FALSE); } return (B_TRUE); } /* * Handle IPsec output processing. * This function is only entered once for a given packet. * We try to do things synchronously, but if we need to have user-level * set up SAs, or ESP or AH uses asynchronous kEF, then the operation * will be completed * - when the SAs are added in esp_add_sa_finish/ah_add_sa_finish * - when asynchronous ESP is done it will do AH * * In all cases we come back in ip_output_post_ipsec() to fragment and * send out the packet. */ int ipsec_out_process(mblk_t *mp, ip_xmit_attr_t *ixa) { ill_t *ill = ixa->ixa_nce->nce_ill; ip_stack_t *ipst = ixa->ixa_ipst; ipsec_stack_t *ipss; ipsec_policy_t *pp; ipsec_action_t *ap; ASSERT(ixa->ixa_flags & IXAF_IPSEC_SECURE); ASSERT((ixa->ixa_ipsec_policy != NULL) || (ixa->ixa_ipsec_action != NULL)); ipss = ipst->ips_netstack->netstack_ipsec; if (!ipsec_loaded(ipss)) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); ip_drop_packet(mp, B_TRUE, ill, DROPPER(ipss, ipds_ip_ipsec_not_loaded), &ipss->ipsec_dropper); return (ENOTSUP); } ap = ixa->ixa_ipsec_action; if (ap == NULL) { pp = ixa->ixa_ipsec_policy; ASSERT(pp != NULL); ap = pp->ipsp_act; ASSERT(ap != NULL); } /* Handle explicit drop action and bypass. */ switch (ap->ipa_act.ipa_type) { case IPSEC_ACT_DISCARD: case IPSEC_ACT_REJECT: ip_drop_packet(mp, B_FALSE, ill, DROPPER(ipss, ipds_spd_explicit), &ipss->ipsec_spd_dropper); return (EHOSTUNREACH); /* IPsec policy failure */ case IPSEC_ACT_BYPASS: return (ip_output_post_ipsec(mp, ixa)); } /* * The order of processing is first insert a IP header if needed. * Then insert the ESP header and then the AH header. */ if ((ixa->ixa_flags & IXAF_IS_IPV4) && 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(ill->ill_rq, 0, SL_ERROR|SL_TRACE|SL_CONSOLE, "ipsec_out_process: " "Self-Encapsulation failed: Out of memory\n"); BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); ip_drop_output("ipIfStatsOutDiscards", mp, ill); freemsg(mp); return (ENOBUFS); } inner_mp = mp; 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; mp = outer_mp; ixa->ixa_flags |= IXAF_IPSEC_TUNNEL; } /* If we need to wait for a SA then we can't return any errno */ if (((ap->ipa_want_ah && (ixa->ixa_ipsec_ah_sa == NULL)) || (ap->ipa_want_esp && (ixa->ixa_ipsec_esp_sa == NULL))) && !ipsec_out_select_sa(mp, ixa)) return (0); /* * By now, we know what SA's to use. Toss over to ESP & AH * to do the heavy lifting. */ if (ap->ipa_want_esp) { ASSERT(ixa->ixa_ipsec_esp_sa != NULL); mp = ixa->ixa_ipsec_esp_sa->ipsa_output_func(mp, ixa); if (mp == NULL) { /* * Either it failed or is pending. In the former case * ipIfStatsInDiscards was increased. */ return (0); } } if (ap->ipa_want_ah) { ASSERT(ixa->ixa_ipsec_ah_sa != NULL); mp = ixa->ixa_ipsec_ah_sa->ipsa_output_func(mp, ixa); if (mp == NULL) { /* * Either it failed or is pending. In the former case * ipIfStatsInDiscards was increased. */ return (0); } } /* * We are done with IPsec processing. Send it over * the wire. */ return (ip_output_post_ipsec(mp, ixa)); } /* * 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; 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) { /* * Special case where ipx_current_ipif is not set: * ill_phyint_reinit merged the v4 and v6 into a single ipsq. * 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. */ ill_t *ill = q->q_ptr; ipsq_current_start(ipsq, ill->ill_ipif, ipip->ipi_cmd); } ASSERT(ipsq->ipsq_xop->ipx_current_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)(ipsq->ipsq_xop->ipx_current_ipif, sin, q, mp, ipip, mp1->b_rptr); DTRACE_PROBE4(ipif__ioctl, char *, "ip_reprocess_ioctl finish", int, ipip->ipi_cmd, ill_t *, ipsq->ipsq_xop->ipx_current_ipif->ipif_ill, ipif_t *, ipsq->ipsq_xop->ipx_current_ipif); ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq); } /* * ioctl processing * * ioctl processing starts with ip_sioctl_copyin_setup(), which looks up * the ioctl command in the ioctl tables, determines the copyin data size * from the ipi_copyin_size field, and does an mi_copyin() of that size. * * ioctl processing then continues when the M_IOCDATA makes its way down to * ip_wput_nondata(). The ioctl is looked up again in the ioctl table, its * associated 'conn' is refheld till the end of the ioctl and the general * ioctl processing function ip_process_ioctl() is called to extract the * arguments and process the ioctl. To simplify extraction, ioctl commands * are "typed" based on the arguments they take (e.g., LIF_CMD which takes a * `struct lifreq'), and a common extract function (e.g., ip_extract_lifreq()) * is used to extract the ioctl's arguments. * * 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. * * 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 = arg; ip_extract_func_t *extract_funcp; 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); DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish", int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL); ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL); return; } ci.ci_ipif = NULL; switch (ipip->ipi_cmd_type) { case MISC_CMD: case MSFILT_CMD: /* * All MISC_CMD ioctls come in here -- e.g. SIOCGLIFCONF. */ if (ipip->ipi_cmd == IF_UNITSEL) { /* ioctl comes down the ill */ ci.ci_ipif = ((ill_t *)q->q_ptr)->ill_ipif; ipif_refhold(ci.ci_ipif); } err = 0; ci.ci_sin = NULL; ci.ci_sin6 = NULL; ci.ci_lifr = NULL; extract_funcp = NULL; break; case IF_CMD: case LIF_CMD: extract_funcp = ip_extract_lifreq; break; case ARP_CMD: case XARP_CMD: extract_funcp = ip_extract_arpreq; break; default: ASSERT(0); } if (extract_funcp != NULL) { err = (*extract_funcp)(q, mp, ipip, &ci); if (err != 0) { DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish err", int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL); ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL); return; } /* * All of the extraction functions return a refheld ipif. */ ASSERT(ci.ci_ipif != NULL); } 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) { DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish RD", int, ipip->ipi_cmd, ill_t *, ci.ci_ipif->ipif_ill, ipif_t *, ci.ci_ipif); ipif_refrele(ci.ci_ipif); } else { DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish RD", int, ipip->ipi_cmd, ill_t *, NULL, ipif_t *, NULL); } ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), NULL); return; } ASSERT(ci.ci_ipif != NULL); /* * If ipsq is non-NULL, we are already being called exclusively */ ASSERT(ipsq == NULL || IAM_WRITER_IPSQ(ipsq)); if (ipsq == NULL) { ipsq = ipsq_try_enter(ci.ci_ipif, NULL, q, mp, ip_process_ioctl, NEW_OP, B_TRUE); if (ipsq == NULL) { ipif_refrele(ci.ci_ipif); return; } 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); ipsq_current_start(ipsq, ci.ci_ipif, ipip->ipi_cmd); /* * 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); DTRACE_PROBE4(ipif__ioctl, char *, "ip_process_ioctl finish WR", int, ipip->ipi_cmd, ill_t *, ci.ci_ipif == NULL ? NULL : ci.ci_ipif->ipif_ill, ipif_t *, ci.ci_ipif); ip_ioctl_finish(q, mp, err, IPI2MODE(ipip), ipsq); if (entered_ipsq) ipsq_exit(ipsq); } /* * 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, ipsq_t *ipsq) { conn_t *connp = NULL; 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: ASSERT(mode == CONN_CLOSE); /* aborted through CONN_CLOSE */ break; } /* * The conn refhold and ioctlref placed on the conn at the start of the * ioctl are released here. */ if (connp != NULL) { CONN_DEC_IOCTLREF(connp); CONN_OPER_PENDING_DONE(connp); } if (ipsq != NULL) ipsq_current_finish(ipsq); } /* Handles all non data messages */ void ip_wput_nondata(queue_t *q, mblk_t *mp) { mblk_t *mp1; struct iocblk *iocp; ip_ioctl_cmd_t *ipip; conn_t *connp; cred_t *cr; char *proto_str; if (CONN_Q(q)) connp = Q_TO_CONN(q); else connp = NULL; 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; } 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 and we are a module, so we drop */ 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. */ if (ipip->ipi_cmd_type == MSFILT_CMD && 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 ipx_pending_mp list must have * a refhold on the conn to resume processing. The * refhold is released when the ioctl completes * (whether normally or abnormally). An ioctlref is also * placed on the conn to prevent TCP from removing the * queue needed to send the ioctl reply back. * In all cases ip_ioctl_finish is called to finish * the ioctl and release the refholds. */ if (connp != NULL) { /* This is not a reentry */ CONN_INC_REF(connp); CONN_INC_IOCTLREF(connp); } else { if (!(ipip->ipi_flags & IPI_MODOK)) { mi_copy_done(q, mp, EINVAL); return; } } ip_process_ioctl(NULL, q, mp, ipip); } else { mi_copyout(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_nondata: unexpected M_IOCNAK, ioc_cmd 0x%x", ((struct iocblk *)mp->b_rptr)->ioc_cmd); freemsg(mp); return; case M_IOCACK: /* /dev/ip shouldn't see this */ goto nak; case M_FLUSH: if (*mp->b_rptr & FLUSHW) flushq(q, FLUSHALL); if (q->q_next) { putnext(q, mp); return; } if (*mp->b_rptr & FLUSHR) { *mp->b_rptr &= ~FLUSHW; qreply(q, mp); return; } freemsg(mp); return; case M_CTL: break; case M_PROTO: case M_PCPROTO: /* * The only PROTO messages we expect are SNMP-related. */ switch (((union T_primitives *)mp->b_rptr)->type) { case T_SVR4_OPTMGMT_REQ: ip2dbg(("ip_wput_nondata: T_SVR4_OPTMGMT_REQ " "flags %x\n", ((struct T_optmgmt_req *)mp->b_rptr)->MGMT_flags)); if (connp == NULL) { proto_str = "T_SVR4_OPTMGMT_REQ"; goto protonak; } /* * All Solaris components should pass a db_credp * for this TPI message, hence we ASSERT. * But in case there is some other M_PROTO that looks * like a TPI message sent by some other kernel * component, we check and return an error. */ cr = msg_getcred(mp, NULL); ASSERT(cr != NULL); if (cr == NULL) { mp = mi_tpi_err_ack_alloc(mp, TSYSERR, EINVAL); if (mp != NULL) qreply(q, mp); return; } if (!snmpcom_req(q, mp, ip_snmp_set, ip_snmp_get, cr)) { proto_str = "Bad SNMPCOM request?"; goto protonak; } return; default: ip1dbg(("ip_wput_nondata: dropping M_PROTO prim %u\n", (int)*(uint_t *)mp->b_rptr)); freemsg(mp); return; } default: break; } if (q->q_next) { putnext(q, mp); } else freemsg(mp); return; nak: iocp->ioc_error = EINVAL; mp->b_datap->db_type = M_IOCNAK; iocp->ioc_count = 0; qreply(q, mp); return; protonak: cmn_err(CE_NOTE, "IP doesn't process %s as a module", proto_str); if ((mp = mi_tpi_err_ack_alloc(mp, TPROTO, EINVAL)) != NULL) qreply(q, mp); } /* * Process IP options in an outbound packet. Verify that the nexthop in a * strict source route is onlink. * Returns non-zero if something fails in which case an ICMP error has been * sent and mp freed. * * Assumes the ULP has called ip_massage_options to move nexthop into ipha_dst. */ int ip_output_options(mblk_t *mp, ipha_t *ipha, ip_xmit_attr_t *ixa, ill_t *ill) { ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; ipaddr_t dst; intptr_t code = 0; ire_t *ire; ip_stack_t *ipst = ixa->ixa_ipst; ip_recv_attr_t iras; ip2dbg(("ip_output_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_output_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_output_options: bad option offset\n")); code = (char *)&opt[IPOPT_OLEN] - (char *)ipha; goto param_prob; } off = opt[IPOPT_OFFSET]; ip1dbg(("ip_output_options: next hop 0x%x\n", ntohl(dst))); /* * For strict: verify that dst is directly * reachable. */ if (optval == IPOPT_SSRR) { ire = ire_ftable_lookup_v4(dst, 0, 0, IRE_INTERFACE, NULL, ALL_ZONES, ixa->ixa_tsl, MATCH_IRE_TYPE | MATCH_IRE_SECATTR, 0, ipst, NULL); if (ire == NULL) { ip1dbg(("ip_output_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_output_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_output_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_output_options: error processing IP options.")); code = (char *)&opt[IPOPT_OFFSET] - (char *)ipha; param_prob: bzero(&iras, sizeof (iras)); iras.ira_ill = iras.ira_rill = ill; iras.ira_ruifindex = ill->ill_phyint->phyint_ifindex; iras.ira_rifindex = iras.ira_ruifindex; iras.ira_flags = IRAF_IS_IPV4; ip_drop_output("ip_output_options", mp, ill); icmp_param_problem(mp, (uint8_t)code, &iras); ASSERT(!(iras.ira_flags & IRAF_IPSEC_SECURE)); return (-1); bad_src_route: bzero(&iras, sizeof (iras)); iras.ira_ill = iras.ira_rill = ill; iras.ira_ruifindex = ill->ill_phyint->phyint_ifindex; iras.ira_rifindex = iras.ira_ruifindex; iras.ira_flags = IRAF_IS_IPV4; ip_drop_input("ICMP_SOURCE_ROUTE_FAILED", mp, ill); icmp_unreachable(mp, ICMP_SOURCE_ROUTE_FAILED, &iras); ASSERT(!(iras.ira_flags & IRAF_IPSEC_SECURE)); 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(ip_stack_t *ipst) { int i, j; idl_tx_list_t *itl_tx; ipst->ips_conn_drain_list_cnt = conn_drain_nthreads; if ((ipst->ips_conn_drain_list_cnt == 0) || (ipst->ips_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) ipst->ips_conn_drain_list_cnt = MIN(boot_max_ncpus, 8); else ipst->ips_conn_drain_list_cnt = MIN(max_ncpus, 8); } ipst->ips_idl_tx_list = kmem_zalloc(TX_FANOUT_SIZE * sizeof (idl_tx_list_t), KM_SLEEP); for (i = 0; i < TX_FANOUT_SIZE; i++) { itl_tx = &ipst->ips_idl_tx_list[i]; itl_tx->txl_drain_list = kmem_zalloc(ipst->ips_conn_drain_list_cnt * sizeof (idl_t), KM_SLEEP); mutex_init(&itl_tx->txl_lock, NULL, MUTEX_DEFAULT, NULL); for (j = 0; j < ipst->ips_conn_drain_list_cnt; j++) { mutex_init(&itl_tx->txl_drain_list[j].idl_lock, NULL, MUTEX_DEFAULT, NULL); itl_tx->txl_drain_list[j].idl_itl = itl_tx; } } } static void conn_drain_fini(ip_stack_t *ipst) { int i; idl_tx_list_t *itl_tx; for (i = 0; i < TX_FANOUT_SIZE; i++) { itl_tx = &ipst->ips_idl_tx_list[i]; kmem_free(itl_tx->txl_drain_list, ipst->ips_conn_drain_list_cnt * sizeof (idl_t)); } kmem_free(ipst->ips_idl_tx_list, TX_FANOUT_SIZE * sizeof (idl_tx_list_t)); ipst->ips_idl_tx_list = NULL; } /* * Flow control has blocked us from proceeding. Insert the given conn in one * of the conn drain lists. When flow control is unblocked, either ip_wsrv() * (STREAMS) or ill_flow_enable() (direct) will be called back, which in turn * will call conn_walk_drain(). See the flow control notes at the top of this * file for more details. */ void conn_drain_insert(conn_t *connp, idl_tx_list_t *tx_list) { idl_t *idl = tx_list->txl_drain_list; uint_t index; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; 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 = tx_list->txl_drain_index; ASSERT(index < ipst->ips_conn_drain_list_cnt); connp->conn_idl = &tx_list->txl_drain_list[index]; index++; if (index == ipst->ips_conn_drain_list_cnt) index = 0; tx_list->txl_drain_index = index; } else { ASSERT(connp->conn_idl->idl_itl == tx_list); } mutex_exit(&connp->conn_lock); idl = connp->conn_idl; mutex_enter(&idl->idl_lock); if ((connp->conn_drain_prev != NULL) || (connp->conn_state_flags & CONN_CLOSING)) { /* * The conn is either already in the drain list or closing. * (We needed to check for CONN_CLOSING again since close can * sneak in between dropping conn_lock and acquiring idl_lock.) */ mutex_exit(&idl->idl_lock); return; } /* * 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; } /* * For non streams based sockets assert flow control. */ conn_setqfull(connp, NULL); mutex_exit(&idl->idl_lock); } static void conn_drain_remove(conn_t *connp) { idl_t *idl = connp->conn_idl; if (idl != NULL) { /* * Remove ourself from the drain list. */ if (connp->conn_drain_next == connp) { /* Singleton in the list */ ASSERT(connp->conn_drain_prev == connp); idl->idl_conn = 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; } /* * NOTE: because conn_idl is associated with a specific drain * list which in turn is tied to the index the TX ring * (txl_cookie) hashes to, and because the TX ring can change * over the lifetime of the conn_t, we must clear conn_idl so * a subsequent conn_drain_insert() will set conn_idl again * based on the latest txl_cookie. */ connp->conn_idl = NULL; } connp->conn_drain_next = NULL; connp->conn_drain_prev = NULL; conn_clrqfull(connp, NULL); /* * For streams based sockets open up flow control. */ if (!IPCL_IS_NONSTR(connp)) enableok(connp->conn_wq); } /* * This conn is closing, and we are called from ip_close. OR * this conn is draining because flow-control on the ill has been relieved. * * We must also need to remove conn's on this idl from the list, and also * inform the sockfs upcalls about the change in flow-control. */ static void conn_drain(conn_t *connp, boolean_t closing) { idl_t *idl; conn_t *next_connp; /* * 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 == NULL || connp->conn_idl != NULL); /* * If the conn doesn't exist or is not on a drain list, bail. */ if (connp == NULL || connp->conn_idl == NULL || connp->conn_drain_prev == NULL) { return; } idl = connp->conn_idl; ASSERT(MUTEX_HELD(&idl->idl_lock)); if (!closing) { next_connp = connp->conn_drain_next; while (next_connp != connp) { conn_t *delconnp = next_connp; next_connp = next_connp->conn_drain_next; conn_drain_remove(delconnp); } ASSERT(connp->conn_drain_next == idl->idl_conn); } conn_drain_remove(connp); } /* * Write service routine. Shared perimeter entry point. * The device queue's messages has fallen below the low water mark and STREAMS * has backenabled the ill_wq. Send sockfs notification about flow-control on * each waiting conn. */ void ip_wsrv(queue_t *q) { ill_t *ill; ill = (ill_t *)q->q_ptr; if (ill->ill_state_flags == 0) { ip_stack_t *ipst = ill->ill_ipst; /* * 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 ill_state_flags check above. */ ip1dbg(("ip_wsrv: walking\n")); conn_walk_drain(ipst, &ipst->ips_idl_tx_list[0]); enableok(ill->ill_wq); } } /* * Callback to disable flow control in IP. * * This is a mac client callback added when the DLD_CAPAB_DIRECT capability * is enabled. * * When MAC_TX() is not able to send any more packets, dld sets its queue * to QFULL and enable the STREAMS flow control. Later, when the underlying * driver is able to continue to send packets, it calls mac_tx_(ring_)update() * function and wakes up corresponding mac worker threads, which in turn * calls this callback function, and disables flow control. */ void ill_flow_enable(void *arg, ip_mac_tx_cookie_t cookie) { ill_t *ill = (ill_t *)arg; ip_stack_t *ipst = ill->ill_ipst; idl_tx_list_t *idl_txl; idl_txl = &ipst->ips_idl_tx_list[IDLHASHINDEX(cookie)]; mutex_enter(&idl_txl->txl_lock); /* add code to to set a flag to indicate idl_txl is enabled */ conn_walk_drain(ipst, idl_txl); mutex_exit(&idl_txl->txl_lock); } /* * Flow control has been relieved and STREAMS has backenabled us; drain * all the conn lists on `tx_list'. */ static void conn_walk_drain(ip_stack_t *ipst, idl_tx_list_t *tx_list) { int i; idl_t *idl; IP_STAT(ipst, ip_conn_walk_drain); for (i = 0; i < ipst->ips_conn_drain_list_cnt; i++) { idl = &tx_list->txl_drain_list[i]; mutex_enter(&idl->idl_lock); conn_drain(idl->idl_conn, B_FALSE); mutex_exit(&idl->idl_lock); } } /* * Determine if the ill and multicast aspects of that packets * "matches" the conn. */ boolean_t conn_wantpacket(conn_t *connp, ip_recv_attr_t *ira, ipha_t *ipha) { ill_t *ill = ira->ira_rill; zoneid_t zoneid = ira->ira_zoneid; uint_t in_ifindex; ipaddr_t dst, src; dst = ipha->ipha_dst; src = ipha->ipha_src; /* * conn_incoming_ifindex is set by IP_BOUND_IF which limits * unicast, broadcast and multicast reception to * conn_incoming_ifindex. * conn_wantpacket is called for unicast, broadcast and * multicast packets. */ in_ifindex = connp->conn_incoming_ifindex; /* mpathd can bind to the under IPMP interface, which we allow */ if (in_ifindex != 0 && in_ifindex != ill->ill_phyint->phyint_ifindex) { if (!IS_UNDER_IPMP(ill)) return (B_FALSE); if (in_ifindex != ipmp_ill_get_ipmp_ifindex(ill)) return (B_FALSE); } if (!IPCL_ZONE_MATCH(connp, zoneid)) return (B_FALSE); if (!(ira->ira_flags & IRAF_MULTICAST)) return (B_TRUE); if (connp->conn_multi_router) { /* multicast packet and multicast router socket: send up */ return (B_TRUE); } if (ipha->ipha_protocol == IPPROTO_PIM || ipha->ipha_protocol == IPPROTO_RSVP) return (B_TRUE); return (conn_hasmembers_ill_withsrc_v4(connp, dst, src, ira->ira_ill)); } void conn_setqfull(conn_t *connp, boolean_t *flow_stopped) { if (IPCL_IS_NONSTR(connp)) { (*connp->conn_upcalls->su_txq_full) (connp->conn_upper_handle, B_TRUE); if (flow_stopped != NULL) *flow_stopped = B_TRUE; } else { queue_t *q = connp->conn_wq; ASSERT(q != NULL); if (!(q->q_flag & QFULL)) { mutex_enter(QLOCK(q)); if (!(q->q_flag & QFULL)) { /* still need to set QFULL */ q->q_flag |= QFULL; /* set flow_stopped to true under QLOCK */ if (flow_stopped != NULL) *flow_stopped = B_TRUE; mutex_exit(QLOCK(q)); } else { /* flow_stopped is left unchanged */ mutex_exit(QLOCK(q)); } } } } void conn_clrqfull(conn_t *connp, boolean_t *flow_stopped) { if (IPCL_IS_NONSTR(connp)) { (*connp->conn_upcalls->su_txq_full) (connp->conn_upper_handle, B_FALSE); if (flow_stopped != NULL) *flow_stopped = B_FALSE; } else { queue_t *q = connp->conn_wq; ASSERT(q != NULL); if (q->q_flag & QFULL) { mutex_enter(QLOCK(q)); if (q->q_flag & QFULL) { q->q_flag &= ~QFULL; /* set flow_stopped to false under QLOCK */ if (flow_stopped != NULL) *flow_stopped = B_FALSE; mutex_exit(QLOCK(q)); if (q->q_flag & QWANTW) qbackenable(q, 0); } else { /* flow_stopped is left unchanged */ mutex_exit(QLOCK(q)); } } } mutex_enter(&connp->conn_lock); connp->conn_blocked = B_FALSE; mutex_exit(&connp->conn_lock); } /* * Return the length in bytes of the IPv4 headers (base header, label, and * other IP options) that will be needed based on the * ip_pkt_t structure passed by the caller. * * The returned length does not include the length of the upper level * protocol (ULP) header. * The caller needs to check that the length doesn't exceed the max for IPv4. */ int ip_total_hdrs_len_v4(const ip_pkt_t *ipp) { int len; len = IP_SIMPLE_HDR_LENGTH; if (ipp->ipp_fields & IPPF_LABEL_V4) { ASSERT(ipp->ipp_label_len_v4 != 0); /* We need to round up here */ len += (ipp->ipp_label_len_v4 + 3) & ~3; } if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) { ASSERT(ipp->ipp_ipv4_options_len != 0); ASSERT((ipp->ipp_ipv4_options_len & 3) == 0); len += ipp->ipp_ipv4_options_len; } return (len); } /* * All-purpose routine to build an IPv4 header with options based * on the abstract ip_pkt_t. * * The caller has to set the source and destination address as well as * ipha_length. The caller has to massage any source route and compensate * for the ULP pseudo-header checksum due to the source route. */ void ip_build_hdrs_v4(uchar_t *buf, uint_t buf_len, const ip_pkt_t *ipp, uint8_t protocol) { ipha_t *ipha = (ipha_t *)buf; uint8_t *cp; /* Initialize IPv4 header */ ipha->ipha_type_of_service = ipp->ipp_type_of_service; ipha->ipha_length = 0; /* Caller will set later */ ipha->ipha_ident = 0; ipha->ipha_fragment_offset_and_flags = 0; ipha->ipha_ttl = ipp->ipp_unicast_hops; ipha->ipha_protocol = protocol; ipha->ipha_hdr_checksum = 0; if ((ipp->ipp_fields & IPPF_ADDR) && IN6_IS_ADDR_V4MAPPED(&ipp->ipp_addr)) ipha->ipha_src = ipp->ipp_addr_v4; cp = (uint8_t *)&ipha[1]; if (ipp->ipp_fields & IPPF_LABEL_V4) { ASSERT(ipp->ipp_label_len_v4 != 0); bcopy(ipp->ipp_label_v4, cp, ipp->ipp_label_len_v4); cp += ipp->ipp_label_len_v4; /* We need to round up here */ while ((uintptr_t)cp & 0x3) { *cp++ = IPOPT_NOP; } } if (ipp->ipp_fields & IPPF_IPV4_OPTIONS) { ASSERT(ipp->ipp_ipv4_options_len != 0); ASSERT((ipp->ipp_ipv4_options_len & 3) == 0); bcopy(ipp->ipp_ipv4_options, cp, ipp->ipp_ipv4_options_len); cp += ipp->ipp_ipv4_options_len; } ipha->ipha_version_and_hdr_length = (uint8_t)((IP_VERSION << 4) + buf_len / 4); ASSERT((int)(cp - buf) == buf_len); } /* 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 we return NULL. * proc indicates the callout position for * this packet and ill is the interface this packet arrived on or will leave * on (inbound and outbound resp.). * * We do the processing on the rill (mapped to the upper if ipmp), but MIB * on the ill corrsponding to the destination IP address. */ mblk_t * ip_process(ip_proc_t proc, mblk_t *mp, ill_t *rill, ill_t *ill) { ip_priv_t *priv; ipp_action_id_t aid; int rc = 0; ipp_packet_t *pp; /* If the classifier is not loaded, return */ if ((aid = ipp_action_lookup(IPGPC_CLASSIFY)) == IPP_ACTION_INVAL) { return (mp); } ASSERT(mp != NULL); /* Allocate the packet structure */ rc = ipp_packet_alloc(&pp, "ip", aid); if (rc != 0) goto drop; /* Allocate the private structure */ rc = ip_priv_alloc((void **)&priv); if (rc != 0) { ipp_packet_free(pp); goto drop; } priv->proc = proc; priv->ill_index = ill_get_upper_ifindex(rill); 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) goto drop; return (mp); } else { /* No mp to trace in ip_drop_input/ip_drop_output */ mp = NULL; } drop: if (proc == IPP_LOCAL_IN || proc == IPP_FWD_IN) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); ip_drop_input("ip_process", mp, ill); } else { BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); ip_drop_output("ip_process", mp, ill); } freemsg(mp); return (NULL); } /* * 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. * * This assumes that a set of IRE_HOST/RTF_MULTIRT has been created for the * multicast addresses with the ire argument being the first one. * We walk the bucket to find all the of those. * * Common to IPv4 and IPv6. */ static int ip_multirt_apply_membership(int (*fn)(conn_t *, boolean_t, const in6_addr_t *, ipaddr_t, uint_t, mcast_record_t, const in6_addr_t *), ire_t *ire, conn_t *connp, boolean_t checkonly, const in6_addr_t *v6group, mcast_record_t fmode, const in6_addr_t *v6src) { ire_t *ire_gw; irb_t *irb; int ifindex; int error = 0; int result; ip_stack_t *ipst = ire->ire_ipst; ipaddr_t group; boolean_t isv6; int match_flags; if (IN6_IS_ADDR_V4MAPPED(v6group)) { IN6_V4MAPPED_TO_IPADDR(v6group, group); isv6 = B_FALSE; } else { isv6 = B_TRUE; } irb = ire->ire_bucket; ASSERT(irb != NULL); result = 0; irb_refhold(irb); for (; ire != NULL; ire = ire->ire_next) { if ((ire->ire_flags & RTF_MULTIRT) == 0) continue; /* We handle -ifp routes by matching on the ill if set */ match_flags = MATCH_IRE_TYPE; if (ire->ire_ill != NULL) match_flags |= MATCH_IRE_ILL; if (isv6) { if (!IN6_ARE_ADDR_EQUAL(&ire->ire_addr_v6, v6group)) continue; ire_gw = ire_ftable_lookup_v6(&ire->ire_gateway_addr_v6, 0, 0, IRE_INTERFACE, ire->ire_ill, ALL_ZONES, NULL, match_flags, 0, ipst, NULL); } else { if (ire->ire_addr != group) continue; ire_gw = ire_ftable_lookup_v4(ire->ire_gateway_addr, 0, 0, IRE_INTERFACE, ire->ire_ill, ALL_ZONES, NULL, match_flags, 0, ipst, NULL); } /* No interface route exists for the gateway; skip this ire. */ if (ire_gw == NULL) continue; if (ire_gw->ire_flags & (RTF_REJECT|RTF_BLACKHOLE)) { ire_refrele(ire_gw); continue; } ASSERT(ire_gw->ire_ill != NULL); /* IRE_INTERFACE */ ifindex = ire_gw->ire_ill->ill_phyint->phyint_ifindex; /* * The operation is considered a success if * it succeeds at least once on any one interface. */ error = fn(connp, checkonly, v6group, INADDR_ANY, ifindex, fmode, v6src); if (error == 0) result = CGTP_MCAST_SUCCESS; ire_refrele(ire_gw); } irb_refrele(irb); /* * Consider the call as successful if we succeeded on at least * one interface. Otherwise, return the last encountered error. */ return (result == CGTP_MCAST_SUCCESS ? 0 : error); } /* * Return the expected CGTP hooks version number. */ int ip_cgtp_filter_supported(void) { return (ip_cgtp_filter_rev); } /* * CGTP hooks can be registered by invoking this function. * Checks that the version number matches. */ int ip_cgtp_filter_register(netstackid_t stackid, cgtp_filter_ops_t *ops) { netstack_t *ns; ip_stack_t *ipst; if (ops->cfo_filter_rev != CGTP_FILTER_REV) return (ENOTSUP); ns = netstack_find_by_stackid(stackid); if (ns == NULL) return (EINVAL); ipst = ns->netstack_ip; ASSERT(ipst != NULL); if (ipst->ips_ip_cgtp_filter_ops != NULL) { netstack_rele(ns); return (EALREADY); } ipst->ips_ip_cgtp_filter_ops = ops; ill_set_inputfn_all(ipst); netstack_rele(ns); return (0); } /* * CGTP hooks can be unregistered by invoking this function. * Returns ENXIO if there was no registration. * Returns EBUSY if the ndd variable has not been turned off. */ int ip_cgtp_filter_unregister(netstackid_t stackid) { netstack_t *ns; ip_stack_t *ipst; ns = netstack_find_by_stackid(stackid); if (ns == NULL) return (EINVAL); ipst = ns->netstack_ip; ASSERT(ipst != NULL); if (ipst->ips_ip_cgtp_filter) { netstack_rele(ns); return (EBUSY); } if (ipst->ips_ip_cgtp_filter_ops == NULL) { netstack_rele(ns); return (ENXIO); } ipst->ips_ip_cgtp_filter_ops = NULL; ill_set_inputfn_all(ipst); netstack_rele(ns); return (0); } /* * Check whether there is a CGTP filter registration. * Returns non-zero if there is a registration, otherwise returns zero. * Note: returns zero if bad stackid. */ int ip_cgtp_filter_is_registered(netstackid_t stackid) { netstack_t *ns; ip_stack_t *ipst; int ret; ns = netstack_find_by_stackid(stackid); if (ns == NULL) return (0); ipst = ns->netstack_ip; ASSERT(ipst != NULL); if (ipst->ips_ip_cgtp_filter_ops != NULL) ret = 1; else ret = 0; netstack_rele(ns); return (ret); } static int ip_squeue_switch(int val) { int rval; switch (val) { case IP_SQUEUE_ENTER_NODRAIN: rval = SQ_NODRAIN; break; case IP_SQUEUE_ENTER: rval = SQ_PROCESS; break; case IP_SQUEUE_FILL: default: rval = SQ_FILL; break; } return (rval); } static void * ip_kstat2_init(netstackid_t stackid, ip_stat_t *ip_statisticsp) { kstat_t *ksp; ip_stat_t template = { { "ip_udp_fannorm", KSTAT_DATA_UINT64 }, { "ip_udp_fanmb", KSTAT_DATA_UINT64 }, { "ip_recv_pullup", KSTAT_DATA_UINT64 }, { "ip_db_ref", KSTAT_DATA_UINT64 }, { "ip_notaligned", KSTAT_DATA_UINT64 }, { "ip_multimblk", KSTAT_DATA_UINT64 }, { "ip_opt", 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_out_sw_cksum_bytes", KSTAT_DATA_UINT64 }, { "ip_in_sw_cksum", KSTAT_DATA_UINT64 }, { "ip_ire_reclaim_calls", KSTAT_DATA_UINT64 }, { "ip_ire_reclaim_deleted", KSTAT_DATA_UINT64 }, { "ip_nce_reclaim_calls", KSTAT_DATA_UINT64 }, { "ip_nce_reclaim_deleted", KSTAT_DATA_UINT64 }, { "ip_dce_reclaim_calls", KSTAT_DATA_UINT64 }, { "ip_dce_reclaim_deleted", 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_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 }, { "conn_in_recvdstaddr", KSTAT_DATA_UINT64 }, { "conn_in_recvopts", KSTAT_DATA_UINT64 }, { "conn_in_recvif", KSTAT_DATA_UINT64 }, { "conn_in_recvslla", KSTAT_DATA_UINT64 }, { "conn_in_recvucred", KSTAT_DATA_UINT64 }, { "conn_in_recvttl", KSTAT_DATA_UINT64 }, { "conn_in_recvhopopts", KSTAT_DATA_UINT64 }, { "conn_in_recvhoplimit", KSTAT_DATA_UINT64 }, { "conn_in_recvdstopts", KSTAT_DATA_UINT64 }, { "conn_in_recvrthdrdstopts", KSTAT_DATA_UINT64 }, { "conn_in_recvrthdr", KSTAT_DATA_UINT64 }, { "conn_in_recvpktinfo", KSTAT_DATA_UINT64 }, { "conn_in_recvtclass", KSTAT_DATA_UINT64 }, { "conn_in_timestamp", KSTAT_DATA_UINT64 }, }; ksp = kstat_create_netstack("ip", 0, "ipstat", "net", KSTAT_TYPE_NAMED, sizeof (template) / sizeof (kstat_named_t), KSTAT_FLAG_VIRTUAL, stackid); if (ksp == NULL) return (NULL); bcopy(&template, ip_statisticsp, sizeof (template)); ksp->ks_data = (void *)ip_statisticsp; ksp->ks_private = (void *)(uintptr_t)stackid; kstat_install(ksp); return (ksp); } static void ip_kstat2_fini(netstackid_t stackid, kstat_t *ksp) { if (ksp != NULL) { ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private); kstat_delete_netstack(ksp, stackid); } } static void * ip_kstat_init(netstackid_t stackid, ip_stack_t *ipst) { kstat_t *ksp; ip_named_kstat_t template = { { "forwarding", KSTAT_DATA_UINT32, 0 }, { "defaultTTL", KSTAT_DATA_UINT32, 0 }, { "inReceives", KSTAT_DATA_UINT64, 0 }, { "inHdrErrors", KSTAT_DATA_UINT32, 0 }, { "inAddrErrors", KSTAT_DATA_UINT32, 0 }, { "forwDatagrams", KSTAT_DATA_UINT64, 0 }, { "inUnknownProtos", KSTAT_DATA_UINT32, 0 }, { "inDiscards", KSTAT_DATA_UINT32, 0 }, { "inDelivers", KSTAT_DATA_UINT64, 0 }, { "outRequests", KSTAT_DATA_UINT64, 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 }, }; ksp = kstat_create_netstack("ip", 0, "ip", "mib2", KSTAT_TYPE_NAMED, NUM_OF_FIELDS(ip_named_kstat_t), 0, stackid); if (ksp == NULL || ksp->ks_data == NULL) return (NULL); template.forwarding.value.ui32 = WE_ARE_FORWARDING(ipst) ? 1:2; template.defaultTTL.value.ui32 = (uint32_t)ipst->ips_ip_def_ttl; template.reasmTimeout.value.ui32 = ipst->ips_ip_reassembly_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, ksp->ks_data, sizeof (template)); ksp->ks_update = ip_kstat_update; ksp->ks_private = (void *)(uintptr_t)stackid; kstat_install(ksp); return (ksp); } static void ip_kstat_fini(netstackid_t stackid, kstat_t *ksp) { if (ksp != NULL) { ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private); kstat_delete_netstack(ksp, stackid); } } static int ip_kstat_update(kstat_t *kp, int rw) { ip_named_kstat_t *ipkp; mib2_ipIfStatsEntry_t ipmib; ill_walk_context_t ctx; ill_t *ill; netstackid_t stackid = (zoneid_t)(uintptr_t)kp->ks_private; netstack_t *ns; ip_stack_t *ipst; if (kp == NULL || kp->ks_data == NULL) return (EIO); if (rw == KSTAT_WRITE) return (EACCES); ns = netstack_find_by_stackid(stackid); if (ns == NULL) return (-1); ipst = ns->netstack_ip; if (ipst == NULL) { netstack_rele(ns); return (-1); } ipkp = (ip_named_kstat_t *)kp->ks_data; bcopy(&ipst->ips_ip_mib, &ipmib, sizeof (ipmib)); rw_enter(&ipst->ips_ill_g_lock, RW_READER); ill = ILL_START_WALK_V4(&ctx, ipst); for (; ill != NULL; ill = ill_next(&ctx, ill)) ip_mib2_add_ip_stats(&ipmib, ill->ill_ip_mib); rw_exit(&ipst->ips_ill_g_lock); ipkp->forwarding.value.ui32 = ipmib.ipIfStatsForwarding; ipkp->defaultTTL.value.ui32 = ipmib.ipIfStatsDefaultTTL; ipkp->inReceives.value.ui64 = ipmib.ipIfStatsHCInReceives; ipkp->inHdrErrors.value.ui32 = ipmib.ipIfStatsInHdrErrors; ipkp->inAddrErrors.value.ui32 = ipmib.ipIfStatsInAddrErrors; ipkp->forwDatagrams.value.ui64 = ipmib.ipIfStatsHCOutForwDatagrams; ipkp->inUnknownProtos.value.ui32 = ipmib.ipIfStatsInUnknownProtos; ipkp->inDiscards.value.ui32 = ipmib.ipIfStatsInDiscards; ipkp->inDelivers.value.ui64 = ipmib.ipIfStatsHCInDelivers; ipkp->outRequests.value.ui64 = ipmib.ipIfStatsHCOutRequests; ipkp->outDiscards.value.ui32 = ipmib.ipIfStatsOutDiscards; ipkp->outNoRoutes.value.ui32 = ipmib.ipIfStatsOutNoRoutes; ipkp->reasmTimeout.value.ui32 = ipst->ips_ip_reassembly_timeout; ipkp->reasmReqds.value.ui32 = ipmib.ipIfStatsReasmReqds; ipkp->reasmOKs.value.ui32 = ipmib.ipIfStatsReasmOKs; ipkp->reasmFails.value.ui32 = ipmib.ipIfStatsReasmFails; ipkp->fragOKs.value.ui32 = ipmib.ipIfStatsOutFragOKs; ipkp->fragFails.value.ui32 = ipmib.ipIfStatsOutFragFails; ipkp->fragCreates.value.ui32 = ipmib.ipIfStatsOutFragCreates; ipkp->routingDiscards.value.ui32 = 0; ipkp->inErrs.value.ui32 = ipmib.tcpIfStatsInErrs; ipkp->noPorts.value.ui32 = ipmib.udpIfStatsNoPorts; ipkp->inCksumErrs.value.ui32 = ipmib.ipIfStatsInCksumErrs; ipkp->reasmDuplicates.value.ui32 = ipmib.ipIfStatsReasmDuplicates; ipkp->reasmPartDups.value.ui32 = ipmib.ipIfStatsReasmPartDups; ipkp->forwProhibits.value.ui32 = ipmib.ipIfStatsForwProhibits; ipkp->udpInCksumErrs.value.ui32 = ipmib.udpIfStatsInCksumErrs; ipkp->udpInOverflows.value.ui32 = ipmib.udpIfStatsInOverflows; ipkp->rawipInOverflows.value.ui32 = ipmib.rawipIfStatsInOverflows; ipkp->ipsecInSucceeded.value.ui32 = ipmib.ipsecIfStatsInSucceeded; ipkp->ipsecInFailed.value.i32 = ipmib.ipsecIfStatsInFailed; ipkp->inIPv6.value.ui32 = ipmib.ipIfStatsInWrongIPVersion; ipkp->outIPv6.value.ui32 = ipmib.ipIfStatsOutWrongIPVersion; ipkp->outSwitchIPv6.value.ui32 = ipmib.ipIfStatsOutSwitchIPVersion; netstack_rele(ns); return (0); } static void * icmp_kstat_init(netstackid_t stackid) { kstat_t *ksp; 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 }, }; ksp = kstat_create_netstack("ip", 0, "icmp", "mib2", KSTAT_TYPE_NAMED, NUM_OF_FIELDS(icmp_named_kstat_t), 0, stackid); if (ksp == NULL || ksp->ks_data == NULL) return (NULL); bcopy(&template, ksp->ks_data, sizeof (template)); ksp->ks_update = icmp_kstat_update; ksp->ks_private = (void *)(uintptr_t)stackid; kstat_install(ksp); return (ksp); } static void icmp_kstat_fini(netstackid_t stackid, kstat_t *ksp) { if (ksp != NULL) { ASSERT(stackid == (netstackid_t)(uintptr_t)ksp->ks_private); kstat_delete_netstack(ksp, stackid); } } static int icmp_kstat_update(kstat_t *kp, int rw) { icmp_named_kstat_t *icmpkp; netstackid_t stackid = (zoneid_t)(uintptr_t)kp->ks_private; netstack_t *ns; ip_stack_t *ipst; if ((kp == NULL) || (kp->ks_data == NULL)) return (EIO); if (rw == KSTAT_WRITE) return (EACCES); ns = netstack_find_by_stackid(stackid); if (ns == NULL) return (-1); ipst = ns->netstack_ip; if (ipst == NULL) { netstack_rele(ns); return (-1); } icmpkp = (icmp_named_kstat_t *)kp->ks_data; icmpkp->inMsgs.value.ui32 = ipst->ips_icmp_mib.icmpInMsgs; icmpkp->inErrors.value.ui32 = ipst->ips_icmp_mib.icmpInErrors; icmpkp->inDestUnreachs.value.ui32 = ipst->ips_icmp_mib.icmpInDestUnreachs; icmpkp->inTimeExcds.value.ui32 = ipst->ips_icmp_mib.icmpInTimeExcds; icmpkp->inParmProbs.value.ui32 = ipst->ips_icmp_mib.icmpInParmProbs; icmpkp->inSrcQuenchs.value.ui32 = ipst->ips_icmp_mib.icmpInSrcQuenchs; icmpkp->inRedirects.value.ui32 = ipst->ips_icmp_mib.icmpInRedirects; icmpkp->inEchos.value.ui32 = ipst->ips_icmp_mib.icmpInEchos; icmpkp->inEchoReps.value.ui32 = ipst->ips_icmp_mib.icmpInEchoReps; icmpkp->inTimestamps.value.ui32 = ipst->ips_icmp_mib.icmpInTimestamps; icmpkp->inTimestampReps.value.ui32 = ipst->ips_icmp_mib.icmpInTimestampReps; icmpkp->inAddrMasks.value.ui32 = ipst->ips_icmp_mib.icmpInAddrMasks; icmpkp->inAddrMaskReps.value.ui32 = ipst->ips_icmp_mib.icmpInAddrMaskReps; icmpkp->outMsgs.value.ui32 = ipst->ips_icmp_mib.icmpOutMsgs; icmpkp->outErrors.value.ui32 = ipst->ips_icmp_mib.icmpOutErrors; icmpkp->outDestUnreachs.value.ui32 = ipst->ips_icmp_mib.icmpOutDestUnreachs; icmpkp->outTimeExcds.value.ui32 = ipst->ips_icmp_mib.icmpOutTimeExcds; icmpkp->outParmProbs.value.ui32 = ipst->ips_icmp_mib.icmpOutParmProbs; icmpkp->outSrcQuenchs.value.ui32 = ipst->ips_icmp_mib.icmpOutSrcQuenchs; icmpkp->outRedirects.value.ui32 = ipst->ips_icmp_mib.icmpOutRedirects; icmpkp->outEchos.value.ui32 = ipst->ips_icmp_mib.icmpOutEchos; icmpkp->outEchoReps.value.ui32 = ipst->ips_icmp_mib.icmpOutEchoReps; icmpkp->outTimestamps.value.ui32 = ipst->ips_icmp_mib.icmpOutTimestamps; icmpkp->outTimestampReps.value.ui32 = ipst->ips_icmp_mib.icmpOutTimestampReps; icmpkp->outAddrMasks.value.ui32 = ipst->ips_icmp_mib.icmpOutAddrMasks; icmpkp->outAddrMaskReps.value.ui32 = ipst->ips_icmp_mib.icmpOutAddrMaskReps; icmpkp->inCksumErrs.value.ui32 = ipst->ips_icmp_mib.icmpInCksumErrs; icmpkp->inUnknowns.value.ui32 = ipst->ips_icmp_mib.icmpInUnknowns; icmpkp->inFragNeeded.value.ui32 = ipst->ips_icmp_mib.icmpInFragNeeded; icmpkp->outFragNeeded.value.ui32 = ipst->ips_icmp_mib.icmpOutFragNeeded; icmpkp->outDrops.value.ui32 = ipst->ips_icmp_mib.icmpOutDrops; icmpkp->inOverflows.value.ui32 = ipst->ips_icmp_mib.icmpInOverflows; icmpkp->inBadRedirects.value.ui32 = ipst->ips_icmp_mib.icmpInBadRedirects; netstack_rele(ns); 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, ipha_t *ipha, ip6_t *ip6h, uint32_t ports, ip_recv_attr_t *ira) { conn_t *connp; queue_t *rq; boolean_t secure; ill_t *ill = ira->ira_ill; ip_stack_t *ipst = ill->ill_ipst; ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec; sctp_stack_t *sctps = ipst->ips_netstack->netstack_sctp; iaflags_t iraflags = ira->ira_flags; ill_t *rill = ira->ira_rill; secure = iraflags & IRAF_IPSEC_SECURE; connp = ipcl_classify_raw(mp, IPPROTO_SCTP, ports, ipha, ip6h, ira, ipst); if (connp == NULL) { /* * Although raw sctp is not summed, OOB chunks must be. * Drop the packet here if the sctp checksum failed. */ if (iraflags & IRAF_SCTP_CSUM_ERR) { SCTPS_BUMP_MIB(sctps, sctpChecksumError); freemsg(mp); return; } ira->ira_ill = ira->ira_rill = NULL; sctp_ootb_input(mp, ira, ipst); ira->ira_ill = ill; ira->ira_rill = rill; return; } rq = connp->conn_rq; if (IPCL_IS_NONSTR(connp) ? connp->conn_flow_cntrld : !canputnext(rq)) { CONN_DEC_REF(connp); BUMP_MIB(ill->ill_ip_mib, rawipIfStatsInOverflows); freemsg(mp); return; } if (((iraflags & IRAF_IS_IPV4) ? CONN_INBOUND_POLICY_PRESENT(connp, ipss) : CONN_INBOUND_POLICY_PRESENT_V6(connp, ipss)) || secure) { mp = ipsec_check_inbound_policy(mp, connp, ipha, ip6h, ira); if (mp == NULL) { BUMP_MIB(ill->ill_ip_mib, ipIfStatsInDiscards); /* Note that mp is NULL */ ip_drop_input("ipIfStatsInDiscards", mp, ill); CONN_DEC_REF(connp); return; } } if (iraflags & IRAF_ICMP_ERROR) { (connp->conn_recvicmp)(connp, mp, NULL, ira); } else { ill_t *rill = ira->ira_rill; BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCInDelivers); /* This is the SOCK_RAW, IPPROTO_SCTP case. */ ira->ira_ill = ira->ira_rill = NULL; (connp->conn_recv)(connp, mp, NULL, ira); ira->ira_ill = ill; ira->ira_rill = rill; } CONN_DEC_REF(connp); } /* * Free a packet that has the link-layer dl_unitdata_req_t or fast-path * header before the ip payload. */ static void ip_xmit_flowctl_drop(ill_t *ill, mblk_t *mp, boolean_t is_fp_mp, int fp_mp_len) { int len = (mp->b_wptr - mp->b_rptr); mblk_t *ip_mp; BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); if (is_fp_mp || len != fp_mp_len) { if (len > fp_mp_len) { /* * fastpath header and ip header in the first mblk */ mp->b_rptr += fp_mp_len; } else { /* * ip_xmit_attach_llhdr had to prepend an mblk to * attach the fastpath header before ip header. */ ip_mp = mp->b_cont; freeb(mp); mp = ip_mp; mp->b_rptr += (fp_mp_len - len); } } else { ip_mp = mp->b_cont; freeb(mp); mp = ip_mp; } ip_drop_output("ipIfStatsOutDiscards - flow ctl", mp, ill); freemsg(mp); } /* * Normal post fragmentation function. * * Send a packet using the passed in nce. This handles both IPv4 and IPv6 * using the same state machine. * * We return an error on failure. In particular we return EWOULDBLOCK * when the driver flow controls. In that case this ensures that ip_wsrv runs * (currently by canputnext failure resulting in backenabling from GLD.) * This allows the callers of conn_ip_output() to use EWOULDBLOCK as an * indication that they can flow control until ip_wsrv() tells then to restart. * * If the nce passed by caller is incomplete, this function * queues the packet and if necessary, sends ARP request and bails. * If the Neighbor Cache 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. */ /* ARGSUSED6 */ int ip_xmit(mblk_t *mp, nce_t *nce, iaflags_t ixaflags, uint_t pkt_len, uint32_t xmit_hint, zoneid_t szone, zoneid_t nolzid, uintptr_t *ixacookie) { queue_t *wq; ill_t *ill = nce->nce_ill; ip_stack_t *ipst = ill->ill_ipst; uint64_t delta; boolean_t isv6 = ill->ill_isv6; boolean_t fp_mp; ncec_t *ncec = nce->nce_common; int64_t now = LBOLT_FASTPATH64; boolean_t is_probe; DTRACE_PROBE1(ip__xmit, nce_t *, nce); ASSERT(mp != NULL); ASSERT(mp->b_datap->db_type == M_DATA); ASSERT(pkt_len == msgdsize(mp)); /* * If we have already been here and are coming back after ARP/ND. * the IXAF_NO_TRACE flag is set. We skip FW_HOOKS, DTRACE and ipobs * in that case since they have seen the packet when it came here * the first time. */ if (ixaflags & IXAF_NO_TRACE) goto sendit; if (ixaflags & IXAF_IS_IPV4) { ipha_t *ipha = (ipha_t *)mp->b_rptr; ASSERT(!isv6); ASSERT(pkt_len == ntohs(((ipha_t *)mp->b_rptr)->ipha_length)); if (HOOKS4_INTERESTED_PHYSICAL_OUT(ipst) && !(ixaflags & IXAF_NO_PFHOOK)) { int error; FW_HOOKS(ipst->ips_ip4_physical_out_event, ipst->ips_ipv4firewall_physical_out, NULL, ill, ipha, mp, mp, 0, ipst, error); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp == NULL) return (error); /* The length could have changed */ pkt_len = msgdsize(mp); } if (ipst->ips_ip4_observe.he_interested) { /* * Note that for TX the zoneid is the sending * zone, whether or not MLP is in play. * Since the szone argument is the IP zoneid (i.e., * zero for exclusive-IP zones) and ipobs wants * the system zoneid, we map it here. */ szone = IP_REAL_ZONEID(szone, ipst); /* * On the outbound path the destination zone will be * unknown as we're sending this packet out on the * wire. */ ipobs_hook(mp, IPOBS_HOOK_OUTBOUND, szone, ALL_ZONES, ill, ipst); } DTRACE_IP7(send, mblk_t *, mp, conn_t *, NULL, void_ip_t *, ipha, __dtrace_ipsr_ill_t *, ill, ipha_t *, ipha, ip6_t *, NULL, int, 0); } else { ip6_t *ip6h = (ip6_t *)mp->b_rptr; ASSERT(isv6); ASSERT(pkt_len == ntohs(((ip6_t *)mp->b_rptr)->ip6_plen) + IPV6_HDR_LEN); if (HOOKS6_INTERESTED_PHYSICAL_OUT(ipst) && !(ixaflags & IXAF_NO_PFHOOK)) { int error; FW_HOOKS6(ipst->ips_ip6_physical_out_event, ipst->ips_ipv6firewall_physical_out, NULL, ill, ip6h, mp, mp, 0, ipst, error); DTRACE_PROBE1(ip6__physical__out__end, mblk_t *, mp); if (mp == NULL) return (error); /* The length could have changed */ pkt_len = msgdsize(mp); } if (ipst->ips_ip6_observe.he_interested) { /* See above */ szone = IP_REAL_ZONEID(szone, ipst); ipobs_hook(mp, IPOBS_HOOK_OUTBOUND, szone, ALL_ZONES, ill, ipst); } DTRACE_IP7(send, mblk_t *, mp, conn_t *, NULL, void_ip_t *, ip6h, __dtrace_ipsr_ill_t *, ill, ipha_t *, NULL, ip6_t *, ip6h, int, 0); } sendit: /* * We check the state without a lock because the state can never * move "backwards" to initial or incomplete. */ switch (ncec->ncec_state) { case ND_REACHABLE: case ND_STALE: case ND_DELAY: case ND_PROBE: mp = ip_xmit_attach_llhdr(mp, nce); if (mp == NULL) { /* * ip_xmit_attach_llhdr has increased * ipIfStatsOutDiscards and called ip_drop_output() */ return (ENOBUFS); } /* * check if nce_fastpath completed and we tagged on a * copy of nce_fp_mp in ip_xmit_attach_llhdr(). */ fp_mp = (mp->b_datap->db_type == M_DATA); if (fp_mp && (ill->ill_capabilities & ILL_CAPAB_DLD_DIRECT)) { ill_dld_direct_t *idd; idd = &ill->ill_dld_capab->idc_direct; /* * Send the packet directly to DLD, where it * may be queued depending on the availability * of transmit resources at the media layer. * Return value should be taken into * account and flow control the TCP. */ BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutTransmits); UPDATE_MIB(ill->ill_ip_mib, ipIfStatsHCOutOctets, pkt_len); if (ixaflags & IXAF_NO_DEV_FLOW_CTL) { (void) idd->idd_tx_df(idd->idd_tx_dh, mp, (uintptr_t)xmit_hint, IP_DROP_ON_NO_DESC); } else { uintptr_t cookie; if ((cookie = idd->idd_tx_df(idd->idd_tx_dh, mp, (uintptr_t)xmit_hint, 0)) != 0) { if (ixacookie != NULL) *ixacookie = cookie; return (EWOULDBLOCK); } } } else { wq = ill->ill_wq; if (!(ixaflags & IXAF_NO_DEV_FLOW_CTL) && !canputnext(wq)) { if (ixacookie != NULL) *ixacookie = 0; ip_xmit_flowctl_drop(ill, mp, fp_mp, nce->nce_fp_mp != NULL ? MBLKL(nce->nce_fp_mp) : 0); return (EWOULDBLOCK); } BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutTransmits); UPDATE_MIB(ill->ill_ip_mib, ipIfStatsHCOutOctets, pkt_len); putnext(wq, mp); } /* * The rest of this function implements Neighbor Unreachability * detection. Determine if the ncec is eligible for NUD. */ if (ncec->ncec_flags & NCE_F_NONUD) return (0); ASSERT(ncec->ncec_state != ND_INCOMPLETE); /* * Check for upper layer advice */ if (ixaflags & IXAF_REACH_CONF) { timeout_id_t tid; /* * It should be o.k. to check the state without * a lock here, at most we lose an advice. */ ncec->ncec_last = TICK_TO_MSEC(now); if (ncec->ncec_state != ND_REACHABLE) { mutex_enter(&ncec->ncec_lock); ncec->ncec_state = ND_REACHABLE; tid = ncec->ncec_timeout_id; ncec->ncec_timeout_id = 0; mutex_exit(&ncec->ncec_lock); (void) untimeout(tid); if (ip_debug > 2) { /* ip1dbg */ pr_addr_dbg("ip_xmit: state" " for %s changed to" " REACHABLE\n", AF_INET6, &ncec->ncec_addr); } } return (0); } delta = TICK_TO_MSEC(now) - ncec->ncec_last; ip1dbg(("ip_xmit: delta = %" PRId64 " ill_reachable_time = %d \n", delta, ill->ill_reachable_time)); if (delta > (uint64_t)ill->ill_reachable_time) { mutex_enter(&ncec->ncec_lock); switch (ncec->ncec_state) { case ND_REACHABLE: ASSERT((ncec->ncec_flags & NCE_F_NONUD) == 0); /* FALLTHROUGH */ case ND_STALE: /* * ND_REACHABLE is identical to * ND_STALE in this specific case. If * reachable time has expired for this * neighbor (delta is greater than * reachable time), conceptually, the * neighbor cache is no longer in * REACHABLE state, but already in * STALE state. So the correct * transition here is to ND_DELAY. */ ncec->ncec_state = ND_DELAY; mutex_exit(&ncec->ncec_lock); nce_restart_timer(ncec, ipst->ips_delay_first_probe_time); if (ip_debug > 3) { /* ip2dbg */ pr_addr_dbg("ip_xmit: state" " for %s changed to" " DELAY\n", AF_INET6, &ncec->ncec_addr); } break; case ND_DELAY: case ND_PROBE: mutex_exit(&ncec->ncec_lock); /* Timers have already started */ break; case ND_UNREACHABLE: /* * nce_timer has detected that this ncec * is unreachable and initiated deleting * this ncec. * This is a harmless race where we found the * ncec before it was deleted and have * just sent out a packet using this * unreachable ncec. */ mutex_exit(&ncec->ncec_lock); break; default: ASSERT(0); mutex_exit(&ncec->ncec_lock); } } return (0); case ND_INCOMPLETE: /* * the state could have changed since we didn't hold the lock. * Re-verify state under lock. */ is_probe = ipmp_packet_is_probe(mp, nce->nce_ill); mutex_enter(&ncec->ncec_lock); if (NCE_ISREACHABLE(ncec)) { mutex_exit(&ncec->ncec_lock); goto sendit; } /* queue the packet */ nce_queue_mp(ncec, mp, is_probe); mutex_exit(&ncec->ncec_lock); DTRACE_PROBE2(ip__xmit__incomplete, (ncec_t *), ncec, (mblk_t *), mp); return (0); case ND_INITIAL: /* * State could have changed since we didn't hold the lock, so * re-verify state. */ is_probe = ipmp_packet_is_probe(mp, nce->nce_ill); mutex_enter(&ncec->ncec_lock); if (NCE_ISREACHABLE(ncec)) { mutex_exit(&ncec->ncec_lock); goto sendit; } nce_queue_mp(ncec, mp, is_probe); if (ncec->ncec_state == ND_INITIAL) { ncec->ncec_state = ND_INCOMPLETE; mutex_exit(&ncec->ncec_lock); /* * figure out the source we want to use * and resolve it. */ ip_ndp_resolve(ncec); } else { mutex_exit(&ncec->ncec_lock); } return (0); case ND_UNREACHABLE: BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); ip_drop_output("ipIfStatsOutDiscards - ND_UNREACHABLE", mp, ill); freemsg(mp); return (0); default: ASSERT(0); BUMP_MIB(ill->ill_ip_mib, ipIfStatsOutDiscards); ip_drop_output("ipIfStatsOutDiscards - ND_other", mp, ill); freemsg(mp); return (ENETUNREACH); } } /* * 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 ip_pkt_t. */ void ip_pkt_free(ip_pkt_t *ipp) { uint_t fields = ipp->ipp_fields; if (fields & IPPF_HOPOPTS) { kmem_free(ipp->ipp_hopopts, ipp->ipp_hopoptslen); ipp->ipp_hopopts = NULL; ipp->ipp_hopoptslen = 0; } if (fields & IPPF_RTHDRDSTOPTS) { kmem_free(ipp->ipp_rthdrdstopts, ipp->ipp_rthdrdstoptslen); ipp->ipp_rthdrdstopts = NULL; ipp->ipp_rthdrdstoptslen = 0; } if (fields & IPPF_DSTOPTS) { kmem_free(ipp->ipp_dstopts, ipp->ipp_dstoptslen); ipp->ipp_dstopts = NULL; ipp->ipp_dstoptslen = 0; } if (fields & IPPF_RTHDR) { kmem_free(ipp->ipp_rthdr, ipp->ipp_rthdrlen); ipp->ipp_rthdr = NULL; ipp->ipp_rthdrlen = 0; } if (fields & IPPF_IPV4_OPTIONS) { kmem_free(ipp->ipp_ipv4_options, ipp->ipp_ipv4_options_len); ipp->ipp_ipv4_options = NULL; ipp->ipp_ipv4_options_len = 0; } if (fields & IPPF_LABEL_V4) { kmem_free(ipp->ipp_label_v4, ipp->ipp_label_len_v4); ipp->ipp_label_v4 = NULL; ipp->ipp_label_len_v4 = 0; } if (fields & IPPF_LABEL_V6) { kmem_free(ipp->ipp_label_v6, ipp->ipp_label_len_v6); ipp->ipp_label_v6 = NULL; ipp->ipp_label_len_v6 = 0; } ipp->ipp_fields &= ~(IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS | IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6); } /* * Copy from src to dst and allocate as needed. * Returns zero or ENOMEM. * * The caller must initialize dst to zero. */ int ip_pkt_copy(ip_pkt_t *src, ip_pkt_t *dst, int kmflag) { uint_t fields = src->ipp_fields; /* Start with fields that don't require memory allocation */ dst->ipp_fields = fields & ~(IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS | IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6); dst->ipp_addr = src->ipp_addr; dst->ipp_unicast_hops = src->ipp_unicast_hops; dst->ipp_hoplimit = src->ipp_hoplimit; dst->ipp_tclass = src->ipp_tclass; dst->ipp_type_of_service = src->ipp_type_of_service; if (!(fields & (IPPF_HOPOPTS | IPPF_RTHDRDSTOPTS | IPPF_DSTOPTS | IPPF_RTHDR | IPPF_IPV4_OPTIONS | IPPF_LABEL_V4 | IPPF_LABEL_V6))) return (0); if (fields & IPPF_HOPOPTS) { dst->ipp_hopopts = kmem_alloc(src->ipp_hopoptslen, kmflag); if (dst->ipp_hopopts == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_HOPOPTS; bcopy(src->ipp_hopopts, dst->ipp_hopopts, src->ipp_hopoptslen); dst->ipp_hopoptslen = src->ipp_hopoptslen; } if (fields & IPPF_RTHDRDSTOPTS) { dst->ipp_rthdrdstopts = kmem_alloc(src->ipp_rthdrdstoptslen, kmflag); if (dst->ipp_rthdrdstopts == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_RTHDRDSTOPTS; bcopy(src->ipp_rthdrdstopts, dst->ipp_rthdrdstopts, src->ipp_rthdrdstoptslen); dst->ipp_rthdrdstoptslen = src->ipp_rthdrdstoptslen; } if (fields & IPPF_DSTOPTS) { dst->ipp_dstopts = kmem_alloc(src->ipp_dstoptslen, kmflag); if (dst->ipp_dstopts == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_DSTOPTS; bcopy(src->ipp_dstopts, dst->ipp_dstopts, src->ipp_dstoptslen); dst->ipp_dstoptslen = src->ipp_dstoptslen; } if (fields & IPPF_RTHDR) { dst->ipp_rthdr = kmem_alloc(src->ipp_rthdrlen, kmflag); if (dst->ipp_rthdr == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_RTHDR; bcopy(src->ipp_rthdr, dst->ipp_rthdr, src->ipp_rthdrlen); dst->ipp_rthdrlen = src->ipp_rthdrlen; } if (fields & IPPF_IPV4_OPTIONS) { dst->ipp_ipv4_options = kmem_alloc(src->ipp_ipv4_options_len, kmflag); if (dst->ipp_ipv4_options == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_IPV4_OPTIONS; bcopy(src->ipp_ipv4_options, dst->ipp_ipv4_options, src->ipp_ipv4_options_len); dst->ipp_ipv4_options_len = src->ipp_ipv4_options_len; } if (fields & IPPF_LABEL_V4) { dst->ipp_label_v4 = kmem_alloc(src->ipp_label_len_v4, kmflag); if (dst->ipp_label_v4 == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_LABEL_V4; bcopy(src->ipp_label_v4, dst->ipp_label_v4, src->ipp_label_len_v4); dst->ipp_label_len_v4 = src->ipp_label_len_v4; } if (fields & IPPF_LABEL_V6) { dst->ipp_label_v6 = kmem_alloc(src->ipp_label_len_v6, kmflag); if (dst->ipp_label_v6 == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_LABEL_V6; bcopy(src->ipp_label_v6, dst->ipp_label_v6, src->ipp_label_len_v6); dst->ipp_label_len_v6 = src->ipp_label_len_v6; } if (fields & IPPF_FRAGHDR) { dst->ipp_fraghdr = kmem_alloc(src->ipp_fraghdrlen, kmflag); if (dst->ipp_fraghdr == NULL) { ip_pkt_free(dst); return (ENOMEM); } dst->ipp_fields |= IPPF_FRAGHDR; bcopy(src->ipp_fraghdr, dst->ipp_fraghdr, src->ipp_fraghdrlen); dst->ipp_fraghdrlen = src->ipp_fraghdrlen; } return (0); } /* * Returns INADDR_ANY if no source route */ ipaddr_t ip_pkt_source_route_v4(const ip_pkt_t *ipp) { ipaddr_t nexthop = INADDR_ANY; ipoptp_t opts; uchar_t *opt; uint8_t optval; uint8_t optlen; uint32_t totallen; if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS)) return (INADDR_ANY); totallen = ipp->ipp_ipv4_options_len; if (totallen & 0x3) return (INADDR_ANY); for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options); 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) { break; } optlen = opts.ipoptp_len; off = opt[IPOPT_OFFSET]; off--; if (optlen < IP_ADDR_LEN || off > optlen - IP_ADDR_LEN) { /* End of source route */ break; } bcopy((char *)opt + off, &nexthop, IP_ADDR_LEN); if (nexthop == htonl(INADDR_LOOPBACK)) { /* Ignore */ nexthop = INADDR_ANY; break; } break; } } return (nexthop); } /* * Reverse a source route. */ void ip_pkt_source_route_reverse_v4(ip_pkt_t *ipp) { ipaddr_t tmp; ipoptp_t opts; uchar_t *opt; uint8_t optval; uint32_t totallen; if (!(ipp->ipp_fields & IPPF_IPV4_OPTIONS)) return; totallen = ipp->ipp_ipv4_options_len; if (totallen & 0x3) return; for (optval = ipoptp_first2(&opts, totallen, ipp->ipp_ipv4_options); optval != IPOPT_EOL; optval = ipoptp_next(&opts)) { uint8_t off1, off2; opt = opts.ipoptp_cur; switch (optval) { case IPOPT_SSRR: case IPOPT_LSRR: if ((opts.ipoptp_flags & IPOPTP_ERROR) != 0) { break; } off1 = IPOPT_MINOFF_SR - 1; off2 = opt[IPOPT_OFFSET] - IP_ADDR_LEN - 1; while (off2 > off1) { bcopy(opt + off2, &tmp, IP_ADDR_LEN); bcopy(opt + off1, opt + off2, IP_ADDR_LEN); bcopy(&tmp, opt + off2, IP_ADDR_LEN); off2 -= IP_ADDR_LEN; off1 += IP_ADDR_LEN; } opt[IPOPT_OFFSET] = IPOPT_MINOFF_SR; break; } } } /* * Returns NULL if no routing header */ in6_addr_t * ip_pkt_source_route_v6(const ip_pkt_t *ipp) { in6_addr_t *nexthop = NULL; ip6_rthdr0_t *rthdr; if (!(ipp->ipp_fields & IPPF_RTHDR)) return (NULL); rthdr = (ip6_rthdr0_t *)ipp->ipp_rthdr; if (rthdr->ip6r0_segleft == 0) return (NULL); nexthop = (in6_addr_t *)((char *)rthdr + sizeof (*rthdr)); return (nexthop); } zoneid_t ip_get_zoneid_v4(ipaddr_t addr, mblk_t *mp, ip_recv_attr_t *ira, zoneid_t lookup_zoneid) { ip_stack_t *ipst = ira->ira_ill->ill_ipst; ire_t *ire; int ire_flags = MATCH_IRE_TYPE; zoneid_t zoneid = ALL_ZONES; if (is_system_labeled() && !tsol_can_accept_raw(mp, ira, B_FALSE)) return (ALL_ZONES); if (lookup_zoneid != ALL_ZONES) ire_flags |= MATCH_IRE_ZONEONLY; ire = ire_ftable_lookup_v4(addr, NULL, NULL, IRE_LOCAL | IRE_LOOPBACK, NULL, lookup_zoneid, NULL, ire_flags, 0, ipst, NULL); if (ire != NULL) { zoneid = IP_REAL_ZONEID(ire->ire_zoneid, ipst); ire_refrele(ire); } return (zoneid); } zoneid_t ip_get_zoneid_v6(in6_addr_t *addr, mblk_t *mp, const ill_t *ill, ip_recv_attr_t *ira, zoneid_t lookup_zoneid) { ip_stack_t *ipst = ira->ira_ill->ill_ipst; ire_t *ire; int ire_flags = MATCH_IRE_TYPE; zoneid_t zoneid = ALL_ZONES; if (is_system_labeled() && !tsol_can_accept_raw(mp, ira, B_FALSE)) return (ALL_ZONES); if (IN6_IS_ADDR_LINKLOCAL(addr)) ire_flags |= MATCH_IRE_ILL; if (lookup_zoneid != ALL_ZONES) ire_flags |= MATCH_IRE_ZONEONLY; ire = ire_ftable_lookup_v6(addr, NULL, NULL, IRE_LOCAL | IRE_LOOPBACK, ill, lookup_zoneid, NULL, ire_flags, 0, ipst, NULL); if (ire != NULL) { zoneid = IP_REAL_ZONEID(ire->ire_zoneid, ipst); ire_refrele(ire); } return (zoneid); } /* * IP obserability hook support functions. */ static void ipobs_init(ip_stack_t *ipst) { netid_t id; id = net_getnetidbynetstackid(ipst->ips_netstack->netstack_stackid); ipst->ips_ip4_observe_pr = net_protocol_lookup(id, NHF_INET); VERIFY(ipst->ips_ip4_observe_pr != NULL); ipst->ips_ip6_observe_pr = net_protocol_lookup(id, NHF_INET6); VERIFY(ipst->ips_ip6_observe_pr != NULL); } static void ipobs_fini(ip_stack_t *ipst) { VERIFY(net_protocol_release(ipst->ips_ip4_observe_pr) == 0); VERIFY(net_protocol_release(ipst->ips_ip6_observe_pr) == 0); } /* * hook_pkt_observe_t is composed in network byte order so that the * entire mblk_t chain handed into hook_run can be used as-is. * The caveat is that use of the fields, such as the zone fields, * requires conversion into host byte order first. */ void ipobs_hook(mblk_t *mp, int htype, zoneid_t zsrc, zoneid_t zdst, const ill_t *ill, ip_stack_t *ipst) { hook_pkt_observe_t *hdr; uint64_t grifindex; mblk_t *imp; imp = allocb(sizeof (*hdr), BPRI_HI); if (imp == NULL) return; hdr = (hook_pkt_observe_t *)imp->b_rptr; /* * b_wptr is set to make the apparent size of the data in the mblk_t * to exclude the pointers at the end of hook_pkt_observer_t. */ imp->b_wptr = imp->b_rptr + sizeof (dl_ipnetinfo_t); imp->b_cont = mp; ASSERT(DB_TYPE(mp) == M_DATA); if (IS_UNDER_IPMP(ill)) grifindex = ipmp_ill_get_ipmp_ifindex(ill); else grifindex = 0; hdr->hpo_version = 1; hdr->hpo_htype = htons(htype); hdr->hpo_pktlen = htonl((ulong_t)msgdsize(mp)); hdr->hpo_ifindex = htonl(ill->ill_phyint->phyint_ifindex); hdr->hpo_grifindex = htonl(grifindex); hdr->hpo_zsrc = htonl(zsrc); hdr->hpo_zdst = htonl(zdst); hdr->hpo_pkt = imp; hdr->hpo_ctx = ipst->ips_netstack; if (ill->ill_isv6) { hdr->hpo_family = AF_INET6; (void) hook_run(ipst->ips_ipv6_net_data->netd_hooks, ipst->ips_ipv6observing, (hook_data_t)hdr); } else { hdr->hpo_family = AF_INET; (void) hook_run(ipst->ips_ipv4_net_data->netd_hooks, ipst->ips_ipv4observing, (hook_data_t)hdr); } imp->b_cont = NULL; freemsg(imp); } /* * Utility routine that checks if `v4srcp' is a valid address on underlying * interface `ill'. If `ipifp' is non-NULL, it's set to a held ipif * associated with `v4srcp' on success. NOTE: if this is not called from * inside the IPSQ (ill_g_lock is not held), `ill' may be removed from the * group during or after this lookup. */ boolean_t ipif_lookup_testaddr_v4(ill_t *ill, const in_addr_t *v4srcp, ipif_t **ipifp) { ipif_t *ipif; ipif = ipif_lookup_addr_exact(*v4srcp, ill, ill->ill_ipst); if (ipif != NULL) { if (ipifp != NULL) *ipifp = ipif; else ipif_refrele(ipif); return (B_TRUE); } ip1dbg(("ipif_lookup_testaddr_v4: cannot find ipif for src %x\n", *v4srcp)); return (B_FALSE); } /* * Transport protocol call back function for CPU state change. */ /* ARGSUSED */ static int ip_tp_cpu_update(cpu_setup_t what, int id, void *arg) { processorid_t cpu_seqid; netstack_handle_t nh; netstack_t *ns; ASSERT(MUTEX_HELD(&cpu_lock)); switch (what) { case CPU_CONFIG: case CPU_ON: case CPU_INIT: case CPU_CPUPART_IN: cpu_seqid = cpu[id]->cpu_seqid; netstack_next_init(&nh); while ((ns = netstack_next(&nh)) != NULL) { tcp_stack_cpu_add(ns->netstack_tcp, cpu_seqid); sctp_stack_cpu_add(ns->netstack_sctp, cpu_seqid); udp_stack_cpu_add(ns->netstack_udp, cpu_seqid); netstack_rele(ns); } netstack_next_fini(&nh); break; case CPU_UNCONFIG: case CPU_OFF: case CPU_CPUPART_OUT: /* * Nothing to do. We don't remove the per CPU stats from * the IP stack even when the CPU goes offline. */ break; default: break; } return (0); }