/* * 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 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1990 Mentat Inc. */ #pragma ident "%Z%%M% %I% %E% SMI" const char udp_version[] = "%Z%%M% %I% %E% SMI"; #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 /* * The ipsec_info.h header file is here since it has the definition for the * M_CTL message types used by IP to convey information to the ULP. The * ipsec_info.h needs the pfkeyv2.h, hence the latter's presence. */ #include #include #include #include #include /* * Synchronization notes: * * UDP is MT and uses the usual kernel synchronization primitives. There are 2 * locks, the fanout lock (uf_lock) and the udp endpoint lock udp_rwlock. * We also use conn_lock when updating things that affect the IP classifier * lookup. * The lock order is udp_rwlock -> uf_lock and is udp_rwlock -> conn_lock. * * The fanout lock uf_lock: * When a UDP endpoint is bound to a local port, it is inserted into * a bind hash list. The list consists of an array of udp_fanout_t buckets. * The size of the array is controlled by the udp_bind_fanout_size variable. * This variable can be changed in /etc/system if the default value is * not large enough. Each bind hash bucket is protected by a per bucket * lock. It protects the udp_bind_hash and udp_ptpbhn fields in the udp_t * structure and a few other fields in the udp_t. A UDP endpoint is removed * from the bind hash list only when it is being unbound or being closed. * The per bucket lock also protects a UDP endpoint's state changes. * * The udp_rwlock: * This protects most of the other fields in the udp_t. The exact list of * fields which are protected by each of the above locks is documented in * the udp_t structure definition. * * Plumbing notes: * UDP is always a device driver. For compatibility with mibopen() code * it is possible to I_PUSH "udp", but that results in pushing a passthrough * dummy module. * * The above implies that we don't support any intermediate module to * reside in between /dev/ip and udp -- in fact, we never supported such * scenario in the past as the inter-layer communication semantics have * always been private. */ /* For /etc/system control */ uint_t udp_bind_fanout_size = UDP_BIND_FANOUT_SIZE; #define NDD_TOO_QUICK_MSG \ "ndd get info rate too high for non-privileged users, try again " \ "later.\n" #define NDD_OUT_OF_BUF_MSG "<< Out of buffer >>\n" /* Option processing attrs */ typedef struct udpattrs_s { union { ip6_pkt_t *udpattr_ipp6; /* For V6 */ ip4_pkt_t *udpattr_ipp4; /* For V4 */ } udpattr_ippu; #define udpattr_ipp6 udpattr_ippu.udpattr_ipp6 #define udpattr_ipp4 udpattr_ippu.udpattr_ipp4 mblk_t *udpattr_mb; boolean_t udpattr_credset; } udpattrs_t; static void udp_addr_req(queue_t *q, mblk_t *mp); static void udp_bind(queue_t *q, mblk_t *mp); static void udp_bind_hash_insert(udp_fanout_t *uf, udp_t *udp); static void udp_bind_hash_remove(udp_t *udp, boolean_t caller_holds_lock); static void udp_bind_result(conn_t *, mblk_t *); static void udp_bind_ack(conn_t *, mblk_t *mp); static void udp_bind_error(conn_t *, mblk_t *mp); static int udp_build_hdrs(udp_t *udp); static void udp_capability_req(queue_t *q, mblk_t *mp); static int udp_close(queue_t *q); static void udp_connect(queue_t *q, mblk_t *mp); static void udp_disconnect(queue_t *q, mblk_t *mp); static void udp_err_ack(queue_t *q, mblk_t *mp, t_scalar_t t_error, int sys_error); static void udp_err_ack_prim(queue_t *q, mblk_t *mp, int primitive, t_scalar_t tlierr, int unixerr); static int udp_extra_priv_ports_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr); static int udp_extra_priv_ports_add(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr); static int udp_extra_priv_ports_del(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr); static void udp_icmp_error(queue_t *q, mblk_t *mp); static void udp_icmp_error_ipv6(queue_t *q, mblk_t *mp); static void udp_info_req(queue_t *q, mblk_t *mp); static void udp_input(void *, mblk_t *, void *); static mblk_t *udp_ip_bind_mp(udp_t *udp, t_scalar_t bind_prim, t_scalar_t addr_length); static void udp_lrput(queue_t *, mblk_t *); static void udp_lwput(queue_t *, mblk_t *); static int udp_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp, boolean_t isv6); static int udp_openv4(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp); static int udp_openv6(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp); static int udp_unitdata_opt_process(queue_t *q, mblk_t *mp, int *errorp, udpattrs_t *udpattrs); static boolean_t udp_opt_allow_udr_set(t_scalar_t level, t_scalar_t name); static int udp_param_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr); static boolean_t udp_param_register(IDP *ndp, udpparam_t *udppa, int cnt); static int udp_param_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr); static void udp_report_item(mblk_t *mp, udp_t *udp); static int udp_rinfop(queue_t *q, infod_t *dp); static int udp_rrw(queue_t *q, struiod_t *dp); static int udp_status_report(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr); static void udp_send_data(udp_t *, queue_t *, mblk_t *, ipha_t *); static void udp_ud_err(queue_t *q, mblk_t *mp, uchar_t *destaddr, t_scalar_t destlen, t_scalar_t err); static void udp_unbind(queue_t *q, mblk_t *mp); static in_port_t udp_update_next_port(udp_t *udp, in_port_t port, boolean_t random); static mblk_t *udp_output_v4(conn_t *, mblk_t *, ipaddr_t, uint16_t, uint_t, int *, boolean_t); static mblk_t *udp_output_v6(conn_t *connp, mblk_t *mp, sin6_t *sin6, int *error); static void udp_wput_other(queue_t *q, mblk_t *mp); static void udp_wput_iocdata(queue_t *q, mblk_t *mp); static size_t udp_set_rcv_hiwat(udp_t *udp, size_t size); static void *udp_stack_init(netstackid_t stackid, netstack_t *ns); static void udp_stack_fini(netstackid_t stackid, void *arg); static void *udp_kstat_init(netstackid_t stackid); static void udp_kstat_fini(netstackid_t stackid, kstat_t *ksp); static void *udp_kstat2_init(netstackid_t, udp_stat_t *); static void udp_kstat2_fini(netstackid_t, kstat_t *); static int udp_kstat_update(kstat_t *kp, int rw); static void udp_rcv_enqueue(queue_t *q, udp_t *udp, mblk_t *mp, uint_t pkt_len); static void udp_rcv_drain(queue_t *q, udp_t *udp, boolean_t closing); static void udp_xmit(queue_t *, mblk_t *, ire_t *ire, conn_t *, zoneid_t); #define UDP_RECV_HIWATER (56 * 1024) #define UDP_RECV_LOWATER 128 #define UDP_XMIT_HIWATER (56 * 1024) #define UDP_XMIT_LOWATER 1024 static struct module_info udp_mod_info = { UDP_MOD_ID, UDP_MOD_NAME, 1, INFPSZ, UDP_RECV_HIWATER, UDP_RECV_LOWATER }; /* * Entry points for UDP as a device. * We have separate open functions for the /dev/udp and /dev/udp6 devices. */ static struct qinit udp_rinitv4 = { NULL, NULL, udp_openv4, udp_close, NULL, &udp_mod_info, NULL, udp_rrw, udp_rinfop, STRUIOT_STANDARD }; static struct qinit udp_rinitv6 = { NULL, NULL, udp_openv6, udp_close, NULL, &udp_mod_info, NULL, udp_rrw, udp_rinfop, STRUIOT_STANDARD }; static struct qinit udp_winit = { (pfi_t)udp_wput, (pfi_t)ip_wsrv, NULL, NULL, NULL, &udp_mod_info, NULL, NULL, NULL, STRUIOT_NONE }; /* * UDP needs to handle I_LINK and I_PLINK since ifconfig * likes to use it as a place to hang the various streams. */ static struct qinit udp_lrinit = { (pfi_t)udp_lrput, NULL, udp_openv4, udp_close, NULL, &udp_mod_info }; static struct qinit udp_lwinit = { (pfi_t)udp_lwput, NULL, udp_openv4, udp_close, NULL, &udp_mod_info }; /* For AF_INET aka /dev/udp */ struct streamtab udpinfov4 = { &udp_rinitv4, &udp_winit, &udp_lrinit, &udp_lwinit }; /* For AF_INET6 aka /dev/udp6 */ struct streamtab udpinfov6 = { &udp_rinitv6, &udp_winit, &udp_lrinit, &udp_lwinit }; static sin_t sin_null; /* Zero address for quick clears */ static sin6_t sin6_null; /* Zero address for quick clears */ #define UDP_MAXPACKET_IPV4 (IP_MAXPACKET - UDPH_SIZE - IP_SIMPLE_HDR_LENGTH) /* Default structure copied into T_INFO_ACK messages */ static struct T_info_ack udp_g_t_info_ack_ipv4 = { T_INFO_ACK, UDP_MAXPACKET_IPV4, /* TSDU_size. Excl. headers */ T_INVALID, /* ETSU_size. udp does not support expedited data. */ T_INVALID, /* CDATA_size. udp does not support connect data. */ T_INVALID, /* DDATA_size. udp does not support disconnect data. */ sizeof (sin_t), /* ADDR_size. */ 0, /* OPT_size - not initialized here */ UDP_MAXPACKET_IPV4, /* TIDU_size. Excl. headers */ T_CLTS, /* SERV_type. udp supports connection-less. */ TS_UNBND, /* CURRENT_state. This is set from udp_state. */ (XPG4_1|SENDZERO) /* PROVIDER_flag */ }; #define UDP_MAXPACKET_IPV6 (IP_MAXPACKET - UDPH_SIZE - IPV6_HDR_LEN) static struct T_info_ack udp_g_t_info_ack_ipv6 = { T_INFO_ACK, UDP_MAXPACKET_IPV6, /* TSDU_size. Excl. headers */ T_INVALID, /* ETSU_size. udp does not support expedited data. */ T_INVALID, /* CDATA_size. udp does not support connect data. */ T_INVALID, /* DDATA_size. udp does not support disconnect data. */ sizeof (sin6_t), /* ADDR_size. */ 0, /* OPT_size - not initialized here */ UDP_MAXPACKET_IPV6, /* TIDU_size. Excl. headers */ T_CLTS, /* SERV_type. udp supports connection-less. */ TS_UNBND, /* CURRENT_state. This is set from udp_state. */ (XPG4_1|SENDZERO) /* PROVIDER_flag */ }; /* largest UDP port number */ #define UDP_MAX_PORT 65535 /* * Table of ND variables supported by udp. These are loaded into us_nd * in udp_open. * All of these are alterable, within the min/max values given, at run time. */ /* BEGIN CSTYLED */ udpparam_t udp_param_arr[] = { /*min max value name */ { 0L, 256, 32, "udp_wroff_extra" }, { 1L, 255, 255, "udp_ipv4_ttl" }, { 0, IPV6_MAX_HOPS, IPV6_DEFAULT_HOPS, "udp_ipv6_hoplimit"}, { 1024, (32 * 1024), 1024, "udp_smallest_nonpriv_port" }, { 0, 1, 1, "udp_do_checksum" }, { 1024, UDP_MAX_PORT, (32 * 1024), "udp_smallest_anon_port" }, { 1024, UDP_MAX_PORT, UDP_MAX_PORT, "udp_largest_anon_port" }, { UDP_XMIT_LOWATER, (1<<30), UDP_XMIT_HIWATER, "udp_xmit_hiwat"}, { 0, (1<<30), UDP_XMIT_LOWATER, "udp_xmit_lowat"}, { UDP_RECV_LOWATER, (1<<30), UDP_RECV_HIWATER, "udp_recv_hiwat"}, { 65536, (1<<30), 2*1024*1024, "udp_max_buf"}, { 100, 60000, 1000, "udp_ndd_get_info_interval"}, }; /* END CSTYLED */ /* Setable in /etc/system */ /* If set to 0, pick ephemeral port sequentially; otherwise randomly. */ uint32_t udp_random_anon_port = 1; /* * Hook functions to enable cluster networking. * On non-clustered systems these vectors must always be NULL */ void (*cl_inet_bind)(uchar_t protocol, sa_family_t addr_family, uint8_t *laddrp, in_port_t lport) = NULL; void (*cl_inet_unbind)(uint8_t protocol, sa_family_t addr_family, uint8_t *laddrp, in_port_t lport) = NULL; typedef union T_primitives *t_primp_t; /* * Return the next anonymous port in the privileged port range for * bind checking. * * Trusted Extension (TX) notes: TX allows administrator to mark or * reserve ports as Multilevel ports (MLP). MLP has special function * on TX systems. Once a port is made MLP, it's not available as * ordinary port. This creates "holes" in the port name space. It * may be necessary to skip the "holes" find a suitable anon port. */ static in_port_t udp_get_next_priv_port(udp_t *udp) { static in_port_t next_priv_port = IPPORT_RESERVED - 1; in_port_t nextport; boolean_t restart = B_FALSE; udp_stack_t *us = udp->udp_us; retry: if (next_priv_port < us->us_min_anonpriv_port || next_priv_port >= IPPORT_RESERVED) { next_priv_port = IPPORT_RESERVED - 1; if (restart) return (0); restart = B_TRUE; } if (is_system_labeled() && (nextport = tsol_next_port(crgetzone(udp->udp_connp->conn_cred), next_priv_port, IPPROTO_UDP, B_FALSE)) != 0) { next_priv_port = nextport; goto retry; } return (next_priv_port--); } /* UDP bind hash report triggered via the Named Dispatch mechanism. */ /* ARGSUSED */ static int udp_bind_hash_report(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr) { udp_fanout_t *udpf; int i; zoneid_t zoneid; conn_t *connp; udp_t *udp; udp_stack_t *us; connp = Q_TO_CONN(q); udp = connp->conn_udp; us = udp->udp_us; /* Refer to comments in udp_status_report(). */ if (cr == NULL || secpolicy_ip_config(cr, B_TRUE) != 0) { if (ddi_get_lbolt() - us->us_last_ndd_get_info_time < drv_usectohz(us->us_ndd_get_info_interval * 1000)) { (void) mi_mpprintf(mp, NDD_TOO_QUICK_MSG); return (0); } } if ((mp->b_cont = allocb(ND_MAX_BUF_LEN, BPRI_HI)) == NULL) { /* The following may work even if we cannot get a large buf. */ (void) mi_mpprintf(mp, NDD_OUT_OF_BUF_MSG); return (0); } (void) mi_mpprintf(mp, "UDP " MI_COL_HDRPAD_STR /* 12345678[89ABCDEF] */ " zone lport src addr dest addr port state"); /* 1234 12345 xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx 12345 UNBOUND */ zoneid = connp->conn_zoneid; for (i = 0; i < us->us_bind_fanout_size; i++) { udpf = &us->us_bind_fanout[i]; mutex_enter(&udpf->uf_lock); /* Print the hash index. */ udp = udpf->uf_udp; if (zoneid != GLOBAL_ZONEID) { /* skip to first entry in this zone; might be none */ while (udp != NULL && udp->udp_connp->conn_zoneid != zoneid) udp = udp->udp_bind_hash; } if (udp != NULL) { uint_t print_len, buf_len; buf_len = mp->b_cont->b_datap->db_lim - mp->b_cont->b_wptr; print_len = snprintf((char *)mp->b_cont->b_wptr, buf_len, "%d\n", i); if (print_len < buf_len) { mp->b_cont->b_wptr += print_len; } else { mp->b_cont->b_wptr += buf_len; } for (; udp != NULL; udp = udp->udp_bind_hash) { if (zoneid == GLOBAL_ZONEID || zoneid == udp->udp_connp->conn_zoneid) udp_report_item(mp->b_cont, udp); } } mutex_exit(&udpf->uf_lock); } us->us_last_ndd_get_info_time = ddi_get_lbolt(); return (0); } /* * Hash list removal routine for udp_t structures. */ static void udp_bind_hash_remove(udp_t *udp, boolean_t caller_holds_lock) { udp_t *udpnext; kmutex_t *lockp; udp_stack_t *us = udp->udp_us; if (udp->udp_ptpbhn == NULL) return; /* * Extract the lock pointer in case there are concurrent * hash_remove's for this instance. */ ASSERT(udp->udp_port != 0); if (!caller_holds_lock) { lockp = &us->us_bind_fanout[UDP_BIND_HASH(udp->udp_port, us->us_bind_fanout_size)].uf_lock; ASSERT(lockp != NULL); mutex_enter(lockp); } if (udp->udp_ptpbhn != NULL) { udpnext = udp->udp_bind_hash; if (udpnext != NULL) { udpnext->udp_ptpbhn = udp->udp_ptpbhn; udp->udp_bind_hash = NULL; } *udp->udp_ptpbhn = udpnext; udp->udp_ptpbhn = NULL; } if (!caller_holds_lock) { mutex_exit(lockp); } } static void udp_bind_hash_insert(udp_fanout_t *uf, udp_t *udp) { udp_t **udpp; udp_t *udpnext; ASSERT(MUTEX_HELD(&uf->uf_lock)); ASSERT(udp->udp_ptpbhn == NULL); udpp = &uf->uf_udp; udpnext = udpp[0]; if (udpnext != NULL) { /* * If the new udp bound to the INADDR_ANY address * and the first one in the list is not bound to * INADDR_ANY we skip all entries until we find the * first one bound to INADDR_ANY. * This makes sure that applications binding to a * specific address get preference over those binding to * INADDR_ANY. */ if (V6_OR_V4_INADDR_ANY(udp->udp_bound_v6src) && !V6_OR_V4_INADDR_ANY(udpnext->udp_bound_v6src)) { while ((udpnext = udpp[0]) != NULL && !V6_OR_V4_INADDR_ANY( udpnext->udp_bound_v6src)) { udpp = &(udpnext->udp_bind_hash); } if (udpnext != NULL) udpnext->udp_ptpbhn = &udp->udp_bind_hash; } else { udpnext->udp_ptpbhn = &udp->udp_bind_hash; } } udp->udp_bind_hash = udpnext; udp->udp_ptpbhn = udpp; udpp[0] = udp; } /* * This routine is called to handle each O_T_BIND_REQ/T_BIND_REQ message * passed to udp_wput. * It associates a port number and local address with the stream. * The O_T_BIND_REQ/T_BIND_REQ is passed downstream to ip with the UDP * protocol type (IPPROTO_UDP) placed in the message following the address. * A T_BIND_ACK message is passed upstream when ip acknowledges the request. * (Called as writer.) * * Note that UDP over IPv4 and IPv6 sockets can use the same port number * without setting SO_REUSEADDR. This is needed so that they * can be viewed as two independent transport protocols. * However, anonymouns ports are allocated from the same range to avoid * duplicating the us->us_next_port_to_try. */ static void udp_bind(queue_t *q, mblk_t *mp) { sin_t *sin; sin6_t *sin6; mblk_t *mp1; in_port_t port; /* Host byte order */ in_port_t requested_port; /* Host byte order */ struct T_bind_req *tbr; int count; in6_addr_t v6src; boolean_t bind_to_req_port_only; int loopmax; udp_fanout_t *udpf; in_port_t lport; /* Network byte order */ zoneid_t zoneid; conn_t *connp; udp_t *udp; boolean_t is_inaddr_any; mlp_type_t addrtype, mlptype; udp_stack_t *us; connp = Q_TO_CONN(q); udp = connp->conn_udp; us = udp->udp_us; if ((mp->b_wptr - mp->b_rptr) < sizeof (*tbr)) { (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "udp_bind: bad req, len %u", (uint_t)(mp->b_wptr - mp->b_rptr)); udp_err_ack(q, mp, TPROTO, 0); return; } if (udp->udp_state != TS_UNBND) { (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "udp_bind: bad state, %u", udp->udp_state); udp_err_ack(q, mp, TOUTSTATE, 0); return; } /* * Reallocate the message to make sure we have enough room for an * address and the protocol type. */ mp1 = reallocb(mp, sizeof (struct T_bind_ack) + sizeof (sin6_t) + 1, 1); if (!mp1) { udp_err_ack(q, mp, TSYSERR, ENOMEM); return; } mp = mp1; tbr = (struct T_bind_req *)mp->b_rptr; switch (tbr->ADDR_length) { case 0: /* Request for a generic port */ tbr->ADDR_offset = sizeof (struct T_bind_req); if (udp->udp_family == AF_INET) { tbr->ADDR_length = sizeof (sin_t); sin = (sin_t *)&tbr[1]; *sin = sin_null; sin->sin_family = AF_INET; mp->b_wptr = (uchar_t *)&sin[1]; } else { ASSERT(udp->udp_family == AF_INET6); tbr->ADDR_length = sizeof (sin6_t); sin6 = (sin6_t *)&tbr[1]; *sin6 = sin6_null; sin6->sin6_family = AF_INET6; mp->b_wptr = (uchar_t *)&sin6[1]; } port = 0; break; case sizeof (sin_t): /* Complete IPv4 address */ sin = (sin_t *)mi_offset_param(mp, tbr->ADDR_offset, sizeof (sin_t)); if (sin == NULL || !OK_32PTR((char *)sin)) { udp_err_ack(q, mp, TSYSERR, EINVAL); return; } if (udp->udp_family != AF_INET || sin->sin_family != AF_INET) { udp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); return; } port = ntohs(sin->sin_port); break; case sizeof (sin6_t): /* complete IPv6 address */ sin6 = (sin6_t *)mi_offset_param(mp, tbr->ADDR_offset, sizeof (sin6_t)); if (sin6 == NULL || !OK_32PTR((char *)sin6)) { udp_err_ack(q, mp, TSYSERR, EINVAL); return; } if (udp->udp_family != AF_INET6 || sin6->sin6_family != AF_INET6) { udp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); return; } port = ntohs(sin6->sin6_port); break; default: /* Invalid request */ (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "udp_bind: bad ADDR_length length %u", tbr->ADDR_length); udp_err_ack(q, mp, TBADADDR, 0); return; } requested_port = port; if (requested_port == 0 || tbr->PRIM_type == O_T_BIND_REQ) bind_to_req_port_only = B_FALSE; else /* T_BIND_REQ and requested_port != 0 */ bind_to_req_port_only = B_TRUE; if (requested_port == 0) { /* * If the application passed in zero for the port number, it * doesn't care which port number we bind to. Get one in the * valid range. */ if (udp->udp_anon_priv_bind) { port = udp_get_next_priv_port(udp); } else { port = udp_update_next_port(udp, us->us_next_port_to_try, B_TRUE); } } else { /* * If the port is in the well-known privileged range, * make sure the caller was privileged. */ int i; boolean_t priv = B_FALSE; if (port < us->us_smallest_nonpriv_port) { priv = B_TRUE; } else { for (i = 0; i < us->us_num_epriv_ports; i++) { if (port == us->us_epriv_ports[i]) { priv = B_TRUE; break; } } } if (priv) { cred_t *cr = DB_CREDDEF(mp, connp->conn_cred); if (secpolicy_net_privaddr(cr, port, IPPROTO_UDP) != 0) { udp_err_ack(q, mp, TACCES, 0); return; } } } if (port == 0) { udp_err_ack(q, mp, TNOADDR, 0); return; } /* * The state must be TS_UNBND. TPI mandates that users must send * TPI primitives only 1 at a time and wait for the response before * sending the next primitive. */ rw_enter(&udp->udp_rwlock, RW_WRITER); if (udp->udp_state != TS_UNBND || udp->udp_pending_op != -1) { rw_exit(&udp->udp_rwlock); (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "udp_bind: bad state, %u", udp->udp_state); udp_err_ack(q, mp, TOUTSTATE, 0); return; } udp->udp_pending_op = tbr->PRIM_type; /* * Copy the source address into our udp structure. This address * may still be zero; if so, IP will fill in the correct address * each time an outbound packet is passed to it. Since the udp is * not yet in the bind hash list, we don't grab the uf_lock to * change udp_ipversion */ if (udp->udp_family == AF_INET) { ASSERT(sin != NULL); ASSERT(udp->udp_ipversion == IPV4_VERSION); udp->udp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + UDPH_SIZE + udp->udp_ip_snd_options_len; IN6_IPADDR_TO_V4MAPPED(sin->sin_addr.s_addr, &v6src); } else { ASSERT(sin6 != NULL); v6src = sin6->sin6_addr; if (IN6_IS_ADDR_V4MAPPED(&v6src)) { /* * no need to hold the uf_lock to set the udp_ipversion * since we are not yet in the fanout list */ udp->udp_ipversion = IPV4_VERSION; udp->udp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + UDPH_SIZE + udp->udp_ip_snd_options_len; } else { udp->udp_ipversion = IPV6_VERSION; udp->udp_max_hdr_len = udp->udp_sticky_hdrs_len; } } /* * If udp_reuseaddr is not set, then we have to make sure that * the IP address and port number the application requested * (or we selected for the application) is not being used by * another stream. If another stream is already using the * requested IP address and port, the behavior depends on * "bind_to_req_port_only". If set the bind fails; otherwise we * search for any an unused port to bind to the the stream. * * As per the BSD semantics, as modified by the Deering multicast * changes, if udp_reuseaddr is set, then we allow multiple binds * to the same port independent of the local IP address. * * This is slightly different than in SunOS 4.X which did not * support IP multicast. Note that the change implemented by the * Deering multicast code effects all binds - not only binding * to IP multicast addresses. * * Note that when binding to port zero we ignore SO_REUSEADDR in * order to guarantee a unique port. */ count = 0; if (udp->udp_anon_priv_bind) { /* * loopmax = (IPPORT_RESERVED-1) - * us->us_min_anonpriv_port + 1 */ loopmax = IPPORT_RESERVED - us->us_min_anonpriv_port; } else { loopmax = us->us_largest_anon_port - us->us_smallest_anon_port + 1; } is_inaddr_any = V6_OR_V4_INADDR_ANY(v6src); zoneid = connp->conn_zoneid; for (;;) { udp_t *udp1; boolean_t found_exclbind = B_FALSE; /* * Walk through the list of udp streams bound to * requested port with the same IP address. */ lport = htons(port); udpf = &us->us_bind_fanout[UDP_BIND_HASH(lport, us->us_bind_fanout_size)]; mutex_enter(&udpf->uf_lock); for (udp1 = udpf->uf_udp; udp1 != NULL; udp1 = udp1->udp_bind_hash) { if (lport != udp1->udp_port) continue; /* * On a labeled system, we must treat bindings to ports * on shared IP addresses by sockets with MAC exemption * privilege as being in all zones, as there's * otherwise no way to identify the right receiver. */ if (!(IPCL_ZONE_MATCH(udp1->udp_connp, zoneid) || IPCL_ZONE_MATCH(connp, udp1->udp_connp->conn_zoneid)) && !connp->conn_mac_exempt && \ !udp1->udp_connp->conn_mac_exempt) continue; /* * If UDP_EXCLBIND is set for either the bound or * binding endpoint, the semantics of bind * is changed according to the following chart. * * spec = specified address (v4 or v6) * unspec = unspecified address (v4 or v6) * A = specified addresses are different for endpoints * * bound bind to allowed? * ------------------------------------- * unspec unspec no * unspec spec no * spec unspec no * spec spec yes if A * * For labeled systems, SO_MAC_EXEMPT behaves the same * as UDP_EXCLBIND, except that zoneid is ignored. */ if (udp1->udp_exclbind || udp->udp_exclbind || udp1->udp_connp->conn_mac_exempt || connp->conn_mac_exempt) { if (V6_OR_V4_INADDR_ANY( udp1->udp_bound_v6src) || is_inaddr_any || IN6_ARE_ADDR_EQUAL(&udp1->udp_bound_v6src, &v6src)) { found_exclbind = B_TRUE; break; } continue; } /* * Check ipversion to allow IPv4 and IPv6 sockets to * have disjoint port number spaces. */ if (udp->udp_ipversion != udp1->udp_ipversion) { /* * On the first time through the loop, if the * the user intentionally specified a * particular port number, then ignore any * bindings of the other protocol that may * conflict. This allows the user to bind IPv6 * alone and get both v4 and v6, or bind both * both and get each seperately. On subsequent * times through the loop, we're checking a * port that we chose (not the user) and thus * we do not allow casual duplicate bindings. */ if (count == 0 && requested_port != 0) continue; } /* * No difference depending on SO_REUSEADDR. * * If existing port is bound to a * non-wildcard IP address and * the requesting stream is bound to * a distinct different IP addresses * (non-wildcard, also), keep going. */ if (!is_inaddr_any && !V6_OR_V4_INADDR_ANY(udp1->udp_bound_v6src) && !IN6_ARE_ADDR_EQUAL(&udp1->udp_bound_v6src, &v6src)) { continue; } break; } if (!found_exclbind && (udp->udp_reuseaddr && requested_port != 0)) { break; } if (udp1 == NULL) { /* * No other stream has this IP address * and port number. We can use it. */ break; } mutex_exit(&udpf->uf_lock); if (bind_to_req_port_only) { /* * We get here only when requested port * is bound (and only first of the for() * loop iteration). * * The semantics of this bind request * require it to fail so we return from * the routine (and exit the loop). * */ udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TADDRBUSY, 0); return; } if (udp->udp_anon_priv_bind) { port = udp_get_next_priv_port(udp); } else { if ((count == 0) && (requested_port != 0)) { /* * If the application wants us to find * a port, get one to start with. Set * requested_port to 0, so that we will * update us->us_next_port_to_try below. */ port = udp_update_next_port(udp, us->us_next_port_to_try, B_TRUE); requested_port = 0; } else { port = udp_update_next_port(udp, port + 1, B_FALSE); } } if (port == 0 || ++count >= loopmax) { /* * We've tried every possible port number and * there are none available, so send an error * to the user. */ udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TNOADDR, 0); return; } } /* * Copy the source address into our udp structure. This address * may still be zero; if so, ip will fill in the correct address * each time an outbound packet is passed to it. * If we are binding to a broadcast or multicast address then * udp_bind_ack will clear the source address when it receives * the T_BIND_ACK. */ udp->udp_v6src = udp->udp_bound_v6src = v6src; udp->udp_port = lport; /* * Now reset the the next anonymous port if the application requested * an anonymous port, or we handed out the next anonymous port. */ if ((requested_port == 0) && (!udp->udp_anon_priv_bind)) { us->us_next_port_to_try = port + 1; } /* Initialize the O_T_BIND_REQ/T_BIND_REQ for ip. */ if (udp->udp_family == AF_INET) { sin->sin_port = udp->udp_port; } else { int error; sin6->sin6_port = udp->udp_port; /* Rebuild the header template */ error = udp_build_hdrs(udp); if (error != 0) { udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); mutex_exit(&udpf->uf_lock); udp_err_ack(q, mp, TSYSERR, error); return; } } udp->udp_state = TS_IDLE; udp_bind_hash_insert(udpf, udp); mutex_exit(&udpf->uf_lock); rw_exit(&udp->udp_rwlock); if (cl_inet_bind) { /* * Running in cluster mode - register bind information */ if (udp->udp_ipversion == IPV4_VERSION) { (*cl_inet_bind)(IPPROTO_UDP, AF_INET, (uint8_t *)(&V4_PART_OF_V6(udp->udp_v6src)), (in_port_t)udp->udp_port); } else { (*cl_inet_bind)(IPPROTO_UDP, AF_INET6, (uint8_t *)&(udp->udp_v6src), (in_port_t)udp->udp_port); } } connp->conn_anon_port = (is_system_labeled() && requested_port == 0); if (is_system_labeled() && (!connp->conn_anon_port || connp->conn_anon_mlp)) { uint16_t mlpport; cred_t *cr = connp->conn_cred; zone_t *zone; zone = crgetzone(cr); connp->conn_mlp_type = udp->udp_recvucred ? mlptBoth : mlptSingle; addrtype = tsol_mlp_addr_type(zone->zone_id, IPV6_VERSION, &v6src, us->us_netstack->netstack_ip); if (addrtype == mlptSingle) { rw_enter(&udp->udp_rwlock, RW_WRITER); udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TNOADDR, 0); connp->conn_anon_port = B_FALSE; connp->conn_mlp_type = mlptSingle; return; } mlpport = connp->conn_anon_port ? PMAPPORT : port; mlptype = tsol_mlp_port_type(zone, IPPROTO_UDP, mlpport, addrtype); if (mlptype != mlptSingle && (connp->conn_mlp_type == mlptSingle || secpolicy_net_bindmlp(cr) != 0)) { if (udp->udp_debug) { (void) strlog(UDP_MOD_ID, 0, 1, SL_ERROR|SL_TRACE, "udp_bind: no priv for multilevel port %d", mlpport); } rw_enter(&udp->udp_rwlock, RW_WRITER); udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TACCES, 0); connp->conn_anon_port = B_FALSE; connp->conn_mlp_type = mlptSingle; return; } /* * If we're specifically binding a shared IP address and the * port is MLP on shared addresses, then check to see if this * zone actually owns the MLP. Reject if not. */ if (mlptype == mlptShared && addrtype == mlptShared) { /* * No need to handle exclusive-stack zones since * ALL_ZONES only applies to the shared stack. */ zoneid_t mlpzone; mlpzone = tsol_mlp_findzone(IPPROTO_UDP, htons(mlpport)); if (connp->conn_zoneid != mlpzone) { if (udp->udp_debug) { (void) strlog(UDP_MOD_ID, 0, 1, SL_ERROR|SL_TRACE, "udp_bind: attempt to bind port " "%d on shared addr in zone %d " "(should be %d)", mlpport, connp->conn_zoneid, mlpzone); } rw_enter(&udp->udp_rwlock, RW_WRITER); udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TACCES, 0); connp->conn_anon_port = B_FALSE; connp->conn_mlp_type = mlptSingle; return; } } if (connp->conn_anon_port) { int error; error = tsol_mlp_anon(zone, mlptype, connp->conn_ulp, port, B_TRUE); if (error != 0) { if (udp->udp_debug) { (void) strlog(UDP_MOD_ID, 0, 1, SL_ERROR|SL_TRACE, "udp_bind: cannot establish anon " "MLP for port %d", port); } rw_enter(&udp->udp_rwlock, RW_WRITER); udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TACCES, 0); connp->conn_anon_port = B_FALSE; connp->conn_mlp_type = mlptSingle; return; } } connp->conn_mlp_type = mlptype; } /* Pass the protocol number in the message following the address. */ *mp->b_wptr++ = IPPROTO_UDP; if (!V6_OR_V4_INADDR_ANY(udp->udp_v6src)) { /* * Append a request for an IRE if udp_v6src not * zero (IPv4 - INADDR_ANY, or IPv6 - all-zeroes address). */ mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); if (!mp->b_cont) { rw_enter(&udp->udp_rwlock, RW_WRITER); udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TSYSERR, ENOMEM); return; } mp->b_cont->b_wptr += sizeof (ire_t); mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; } if (udp->udp_family == AF_INET6) mp = ip_bind_v6(q, mp, connp, NULL); else mp = ip_bind_v4(q, mp, connp); /* The above return NULL if the bind needs to be deferred */ if (mp != NULL) udp_bind_result(connp, mp); else CONN_INC_REF(connp); } /* * This is called from ip_wput_nondata to handle the results of a * deferred UDP bind. It is called once the bind has been completed. */ void udp_resume_bind(conn_t *connp, mblk_t *mp) { ASSERT(connp != NULL && IPCL_IS_UDP(connp)); udp_bind_result(connp, mp); CONN_OPER_PENDING_DONE(connp); } /* * This routine handles each T_CONN_REQ message passed to udp. It * associates a default destination address with the stream. * * This routine sends down a T_BIND_REQ to IP with the following mblks: * T_BIND_REQ - specifying local and remote address/port * IRE_DB_REQ_TYPE - to get an IRE back containing ire_type and src * T_OK_ACK - for the T_CONN_REQ * T_CONN_CON - to keep the TPI user happy * * The connect completes in udp_bind_result. * When a T_BIND_ACK is received information is extracted from the IRE * and the two appended messages are sent to the TPI user. * Should udp_bind_result receive T_ERROR_ACK for the T_BIND_REQ it will * convert it to an error ack for the appropriate primitive. */ static void udp_connect(queue_t *q, mblk_t *mp) { sin6_t *sin6; sin_t *sin; struct T_conn_req *tcr; in6_addr_t v6dst; ipaddr_t v4dst; uint16_t dstport; uint32_t flowinfo; mblk_t *mp1, *mp2; udp_fanout_t *udpf; udp_t *udp, *udp1; ushort_t ipversion; udp_stack_t *us; conn_t *connp = Q_TO_CONN(q); udp = connp->conn_udp; tcr = (struct T_conn_req *)mp->b_rptr; us = udp->udp_us; /* A bit of sanity checking */ if ((mp->b_wptr - mp->b_rptr) < sizeof (struct T_conn_req)) { udp_err_ack(q, mp, TPROTO, 0); return; } if (tcr->OPT_length != 0) { udp_err_ack(q, mp, TBADOPT, 0); return; } /* * Determine packet type based on type of address passed in * the request should contain an IPv4 or IPv6 address. * Make sure that address family matches the type of * family of the the address passed down */ switch (tcr->DEST_length) { default: udp_err_ack(q, mp, TBADADDR, 0); return; case sizeof (sin_t): sin = (sin_t *)mi_offset_param(mp, tcr->DEST_offset, sizeof (sin_t)); if (sin == NULL || !OK_32PTR((char *)sin)) { udp_err_ack(q, mp, TSYSERR, EINVAL); return; } if (udp->udp_family != AF_INET || sin->sin_family != AF_INET) { udp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); return; } v4dst = sin->sin_addr.s_addr; dstport = sin->sin_port; IN6_IPADDR_TO_V4MAPPED(v4dst, &v6dst); ASSERT(udp->udp_ipversion == IPV4_VERSION); ipversion = IPV4_VERSION; break; case sizeof (sin6_t): sin6 = (sin6_t *)mi_offset_param(mp, tcr->DEST_offset, sizeof (sin6_t)); if (sin6 == NULL || !OK_32PTR((char *)sin6)) { udp_err_ack(q, mp, TSYSERR, EINVAL); return; } if (udp->udp_family != AF_INET6 || sin6->sin6_family != AF_INET6) { udp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); return; } v6dst = sin6->sin6_addr; dstport = sin6->sin6_port; if (IN6_IS_ADDR_V4MAPPED(&v6dst)) { IN6_V4MAPPED_TO_IPADDR(&v6dst, v4dst); ipversion = IPV4_VERSION; flowinfo = 0; } else { ipversion = IPV6_VERSION; flowinfo = sin6->sin6_flowinfo; } break; } if (dstport == 0) { udp_err_ack(q, mp, TBADADDR, 0); return; } rw_enter(&udp->udp_rwlock, RW_WRITER); /* * This UDP must have bound to a port already before doing a connect. * TPI mandates that users must send TPI primitives only 1 at a time * and wait for the response before sending the next primitive. */ if (udp->udp_state == TS_UNBND || udp->udp_pending_op != -1) { rw_exit(&udp->udp_rwlock); (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "udp_connect: bad state, %u", udp->udp_state); udp_err_ack(q, mp, TOUTSTATE, 0); return; } udp->udp_pending_op = T_CONN_REQ; ASSERT(udp->udp_port != 0 && udp->udp_ptpbhn != NULL); if (ipversion == IPV4_VERSION) { udp->udp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + UDPH_SIZE + udp->udp_ip_snd_options_len; } else { udp->udp_max_hdr_len = udp->udp_sticky_hdrs_len; } udpf = &us->us_bind_fanout[UDP_BIND_HASH(udp->udp_port, us->us_bind_fanout_size)]; mutex_enter(&udpf->uf_lock); if (udp->udp_state == TS_DATA_XFER) { /* Already connected - clear out state */ udp->udp_v6src = udp->udp_bound_v6src; udp->udp_state = TS_IDLE; } /* * Create a default IP header with no IP options. */ udp->udp_dstport = dstport; udp->udp_ipversion = ipversion; if (ipversion == IPV4_VERSION) { /* * Interpret a zero destination to mean loopback. * Update the T_CONN_REQ (sin/sin6) since it is used to * generate the T_CONN_CON. */ if (v4dst == INADDR_ANY) { v4dst = htonl(INADDR_LOOPBACK); IN6_IPADDR_TO_V4MAPPED(v4dst, &v6dst); if (udp->udp_family == AF_INET) { sin->sin_addr.s_addr = v4dst; } else { sin6->sin6_addr = v6dst; } } udp->udp_v6dst = v6dst; udp->udp_flowinfo = 0; /* * If the destination address is multicast and * an outgoing multicast interface has been set, * use the address of that interface as our * source address if no source address has been set. */ if (V4_PART_OF_V6(udp->udp_v6src) == INADDR_ANY && CLASSD(v4dst) && udp->udp_multicast_if_addr != INADDR_ANY) { IN6_IPADDR_TO_V4MAPPED(udp->udp_multicast_if_addr, &udp->udp_v6src); } } else { ASSERT(udp->udp_ipversion == IPV6_VERSION); /* * Interpret a zero destination to mean loopback. * Update the T_CONN_REQ (sin/sin6) since it is used to * generate the T_CONN_CON. */ if (IN6_IS_ADDR_UNSPECIFIED(&v6dst)) { v6dst = ipv6_loopback; sin6->sin6_addr = v6dst; } udp->udp_v6dst = v6dst; udp->udp_flowinfo = flowinfo; /* * If the destination address is multicast and * an outgoing multicast interface has been set, * then the ip bind logic will pick the correct source * address (i.e. matching the outgoing multicast interface). */ } /* * Verify that the src/port/dst/port is unique for all * connections in TS_DATA_XFER */ for (udp1 = udpf->uf_udp; udp1 != NULL; udp1 = udp1->udp_bind_hash) { if (udp1->udp_state != TS_DATA_XFER) continue; if (udp->udp_port != udp1->udp_port || udp->udp_ipversion != udp1->udp_ipversion || dstport != udp1->udp_dstport || !IN6_ARE_ADDR_EQUAL(&udp->udp_v6src, &udp1->udp_v6src) || !IN6_ARE_ADDR_EQUAL(&v6dst, &udp1->udp_v6dst) || !(IPCL_ZONE_MATCH(udp->udp_connp, udp1->udp_connp->conn_zoneid) || IPCL_ZONE_MATCH(udp1->udp_connp, udp->udp_connp->conn_zoneid))) continue; mutex_exit(&udpf->uf_lock); udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TBADADDR, 0); return; } udp->udp_state = TS_DATA_XFER; mutex_exit(&udpf->uf_lock); /* * Send down bind to IP to verify that there is a route * and to determine the source address. * This will come back as T_BIND_ACK with an IRE_DB_TYPE in rput. */ if (udp->udp_family == AF_INET) mp1 = udp_ip_bind_mp(udp, O_T_BIND_REQ, sizeof (ipa_conn_t)); else mp1 = udp_ip_bind_mp(udp, O_T_BIND_REQ, sizeof (ipa6_conn_t)); if (mp1 == NULL) { bind_failed: mutex_enter(&udpf->uf_lock); udp->udp_state = TS_IDLE; udp->udp_pending_op = -1; mutex_exit(&udpf->uf_lock); rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TSYSERR, ENOMEM); return; } rw_exit(&udp->udp_rwlock); /* * We also have to send a connection confirmation to * keep TLI happy. Prepare it for udp_bind_result. */ if (udp->udp_family == AF_INET) mp2 = mi_tpi_conn_con(NULL, (char *)sin, sizeof (*sin), NULL, 0); else mp2 = mi_tpi_conn_con(NULL, (char *)sin6, sizeof (*sin6), NULL, 0); if (mp2 == NULL) { freemsg(mp1); rw_enter(&udp->udp_rwlock, RW_WRITER); goto bind_failed; } mp = mi_tpi_ok_ack_alloc(mp); if (mp == NULL) { /* Unable to reuse the T_CONN_REQ for the ack. */ freemsg(mp2); rw_enter(&udp->udp_rwlock, RW_WRITER); mutex_enter(&udpf->uf_lock); udp->udp_state = TS_IDLE; udp->udp_pending_op = -1; mutex_exit(&udpf->uf_lock); rw_exit(&udp->udp_rwlock); udp_err_ack_prim(q, mp1, T_CONN_REQ, TSYSERR, ENOMEM); return; } /* Hang onto the T_OK_ACK and T_CONN_CON for later. */ linkb(mp1, mp); linkb(mp1, mp2); mblk_setcred(mp1, connp->conn_cred); if (udp->udp_family == AF_INET) mp1 = ip_bind_v4(q, mp1, connp); else mp1 = ip_bind_v6(q, mp1, connp, NULL); /* The above return NULL if the bind needs to be deferred */ if (mp1 != NULL) udp_bind_result(connp, mp1); else CONN_INC_REF(connp); } static int udp_close(queue_t *q) { conn_t *connp = (conn_t *)q->q_ptr; udp_t *udp; ASSERT(connp != NULL && IPCL_IS_UDP(connp)); udp = connp->conn_udp; udp_quiesce_conn(connp); ip_quiesce_conn(connp); /* * Disable read-side synchronous stream * interface and drain any queued data. */ udp_rcv_drain(q, udp, B_TRUE); ASSERT(!udp->udp_direct_sockfs); qprocsoff(q); ASSERT(udp->udp_rcv_cnt == 0); ASSERT(udp->udp_rcv_msgcnt == 0); ASSERT(udp->udp_rcv_list_head == NULL); ASSERT(udp->udp_rcv_list_tail == NULL); udp_close_free(connp); /* * 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); } /* * Called in the close path to quiesce the conn */ void udp_quiesce_conn(conn_t *connp) { udp_t *udp = connp->conn_udp; if (cl_inet_unbind != NULL && udp->udp_state == TS_IDLE) { /* * Running in cluster mode - register unbind information */ if (udp->udp_ipversion == IPV4_VERSION) { (*cl_inet_unbind)(IPPROTO_UDP, AF_INET, (uint8_t *)(&(V4_PART_OF_V6(udp->udp_v6src))), (in_port_t)udp->udp_port); } else { (*cl_inet_unbind)(IPPROTO_UDP, AF_INET6, (uint8_t *)(&(udp->udp_v6src)), (in_port_t)udp->udp_port); } } udp_bind_hash_remove(udp, B_FALSE); } void udp_close_free(conn_t *connp) { udp_t *udp = connp->conn_udp; /* If there are any options associated with the stream, free them. */ if (udp->udp_ip_snd_options != NULL) { mi_free((char *)udp->udp_ip_snd_options); udp->udp_ip_snd_options = NULL; udp->udp_ip_snd_options_len = 0; } if (udp->udp_ip_rcv_options != NULL) { mi_free((char *)udp->udp_ip_rcv_options); udp->udp_ip_rcv_options = NULL; udp->udp_ip_rcv_options_len = 0; } /* Free memory associated with sticky options */ if (udp->udp_sticky_hdrs_len != 0) { kmem_free(udp->udp_sticky_hdrs, udp->udp_sticky_hdrs_len); udp->udp_sticky_hdrs = NULL; udp->udp_sticky_hdrs_len = 0; } ip6_pkt_free(&udp->udp_sticky_ipp); /* * Clear any fields which the kmem_cache constructor clears. * Only udp_connp needs to be preserved. * TBD: We should make this more efficient to avoid clearing * everything. */ ASSERT(udp->udp_connp == connp); bzero(udp, sizeof (udp_t)); udp->udp_connp = connp; } /* * This routine handles each T_DISCON_REQ message passed to udp * as an indicating that UDP is no longer connected. This results * in sending a T_BIND_REQ to IP to restore the binding to just * the local address/port. * * This routine sends down a T_BIND_REQ to IP with the following mblks: * T_BIND_REQ - specifying just the local address/port * T_OK_ACK - for the T_DISCON_REQ * * The disconnect completes in udp_bind_result. * When a T_BIND_ACK is received the appended T_OK_ACK is sent to the TPI user. * Should udp_bind_result receive T_ERROR_ACK for the T_BIND_REQ it will * convert it to an error ack for the appropriate primitive. */ static void udp_disconnect(queue_t *q, mblk_t *mp) { udp_t *udp; mblk_t *mp1; udp_fanout_t *udpf; udp_stack_t *us; conn_t *connp = Q_TO_CONN(q); udp = connp->conn_udp; us = udp->udp_us; rw_enter(&udp->udp_rwlock, RW_WRITER); if (udp->udp_state != TS_DATA_XFER || udp->udp_pending_op != -1) { rw_exit(&udp->udp_rwlock); (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, "udp_disconnect: bad state, %u", udp->udp_state); udp_err_ack(q, mp, TOUTSTATE, 0); return; } udp->udp_pending_op = T_DISCON_REQ; udpf = &us->us_bind_fanout[UDP_BIND_HASH(udp->udp_port, us->us_bind_fanout_size)]; mutex_enter(&udpf->uf_lock); udp->udp_v6src = udp->udp_bound_v6src; udp->udp_state = TS_IDLE; mutex_exit(&udpf->uf_lock); /* * Send down bind to IP to remove the full binding and revert * to the local address binding. */ if (udp->udp_family == AF_INET) mp1 = udp_ip_bind_mp(udp, O_T_BIND_REQ, sizeof (sin_t)); else mp1 = udp_ip_bind_mp(udp, O_T_BIND_REQ, sizeof (sin6_t)); if (mp1 == NULL) { udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TSYSERR, ENOMEM); return; } mp = mi_tpi_ok_ack_alloc(mp); if (mp == NULL) { /* Unable to reuse the T_DISCON_REQ for the ack. */ udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack_prim(q, mp1, T_DISCON_REQ, TSYSERR, ENOMEM); return; } if (udp->udp_family == AF_INET6) { int error; /* Rebuild the header template */ error = udp_build_hdrs(udp); if (error != 0) { udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); udp_err_ack_prim(q, mp, T_DISCON_REQ, TSYSERR, error); freemsg(mp1); return; } } rw_exit(&udp->udp_rwlock); /* Append the T_OK_ACK to the T_BIND_REQ for udp_bind_ack */ linkb(mp1, mp); if (udp->udp_family == AF_INET6) mp1 = ip_bind_v6(q, mp1, connp, NULL); else mp1 = ip_bind_v4(q, mp1, connp); /* The above return NULL if the bind needs to be deferred */ if (mp1 != NULL) udp_bind_result(connp, mp1); else CONN_INC_REF(connp); } /* This routine creates a T_ERROR_ACK message and passes it upstream. */ static void udp_err_ack(queue_t *q, mblk_t *mp, t_scalar_t t_error, int sys_error) { if ((mp = mi_tpi_err_ack_alloc(mp, t_error, sys_error)) != NULL) qreply(q, mp); } /* Shorthand to generate and send TPI error acks to our client */ static void udp_err_ack_prim(queue_t *q, mblk_t *mp, int primitive, t_scalar_t t_error, int sys_error) { struct T_error_ack *teackp; if ((mp = tpi_ack_alloc(mp, sizeof (struct T_error_ack), M_PCPROTO, T_ERROR_ACK)) != NULL) { teackp = (struct T_error_ack *)mp->b_rptr; teackp->ERROR_prim = primitive; teackp->TLI_error = t_error; teackp->UNIX_error = sys_error; qreply(q, mp); } } /*ARGSUSED*/ static int udp_extra_priv_ports_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr) { int i; udp_t *udp = Q_TO_UDP(q); udp_stack_t *us = udp->udp_us; for (i = 0; i < us->us_num_epriv_ports; i++) { if (us->us_epriv_ports[i] != 0) (void) mi_mpprintf(mp, "%d ", us->us_epriv_ports[i]); } return (0); } /* ARGSUSED */ static int udp_extra_priv_ports_add(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr) { long new_value; int i; udp_t *udp = Q_TO_UDP(q); udp_stack_t *us = udp->udp_us; /* * Fail the request if the new value does not lie within the * port number limits. */ if (ddi_strtol(value, NULL, 10, &new_value) != 0 || new_value <= 0 || new_value >= 65536) { return (EINVAL); } /* Check if the value is already in the list */ for (i = 0; i < us->us_num_epriv_ports; i++) { if (new_value == us->us_epriv_ports[i]) { return (EEXIST); } } /* Find an empty slot */ for (i = 0; i < us->us_num_epriv_ports; i++) { if (us->us_epriv_ports[i] == 0) break; } if (i == us->us_num_epriv_ports) { return (EOVERFLOW); } /* Set the new value */ us->us_epriv_ports[i] = (in_port_t)new_value; return (0); } /* ARGSUSED */ static int udp_extra_priv_ports_del(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr) { long new_value; int i; udp_t *udp = Q_TO_UDP(q); udp_stack_t *us = udp->udp_us; /* * Fail the request if the new value does not lie within the * port number limits. */ if (ddi_strtol(value, NULL, 10, &new_value) != 0 || new_value <= 0 || new_value >= 65536) { return (EINVAL); } /* Check that the value is already in the list */ for (i = 0; i < us->us_num_epriv_ports; i++) { if (us->us_epriv_ports[i] == new_value) break; } if (i == us->us_num_epriv_ports) { return (ESRCH); } /* Clear the value */ us->us_epriv_ports[i] = 0; return (0); } /* At minimum we need 4 bytes of UDP header */ #define ICMP_MIN_UDP_HDR 4 /* * udp_icmp_error is called by udp_input to process ICMP msgs. passed up by IP. * Generates the appropriate T_UDERROR_IND for permanent (non-transient) errors. * Assumes that IP has pulled up everything up to and including the ICMP header. */ static void udp_icmp_error(queue_t *q, mblk_t *mp) { icmph_t *icmph; ipha_t *ipha; int iph_hdr_length; udpha_t *udpha; sin_t sin; sin6_t sin6; mblk_t *mp1; int error = 0; udp_t *udp = Q_TO_UDP(q); ipha = (ipha_t *)mp->b_rptr; ASSERT(OK_32PTR(mp->b_rptr)); if (IPH_HDR_VERSION(ipha) != IPV4_VERSION) { ASSERT(IPH_HDR_VERSION(ipha) == IPV6_VERSION); udp_icmp_error_ipv6(q, mp); return; } ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION); /* Skip past the outer IP and ICMP headers */ iph_hdr_length = IPH_HDR_LENGTH(ipha); icmph = (icmph_t *)&mp->b_rptr[iph_hdr_length]; ipha = (ipha_t *)&icmph[1]; /* Skip past the inner IP and find the ULP header */ iph_hdr_length = IPH_HDR_LENGTH(ipha); udpha = (udpha_t *)((char *)ipha + iph_hdr_length); switch (icmph->icmph_type) { case ICMP_DEST_UNREACHABLE: switch (icmph->icmph_code) { case ICMP_FRAGMENTATION_NEEDED: /* * IP has already adjusted the path MTU. */ break; case ICMP_PORT_UNREACHABLE: case ICMP_PROTOCOL_UNREACHABLE: error = ECONNREFUSED; break; default: /* Transient errors */ break; } break; default: /* Transient errors */ break; } if (error == 0) { freemsg(mp); return; } /* * Deliver T_UDERROR_IND when the application has asked for it. * The socket layer enables this automatically when connected. */ if (!udp->udp_dgram_errind) { freemsg(mp); return; } switch (udp->udp_family) { case AF_INET: sin = sin_null; sin.sin_family = AF_INET; sin.sin_addr.s_addr = ipha->ipha_dst; sin.sin_port = udpha->uha_dst_port; mp1 = mi_tpi_uderror_ind((char *)&sin, sizeof (sin_t), NULL, 0, error); break; case AF_INET6: sin6 = sin6_null; sin6.sin6_family = AF_INET6; IN6_IPADDR_TO_V4MAPPED(ipha->ipha_dst, &sin6.sin6_addr); sin6.sin6_port = udpha->uha_dst_port; mp1 = mi_tpi_uderror_ind((char *)&sin6, sizeof (sin6_t), NULL, 0, error); break; } if (mp1) putnext(q, mp1); freemsg(mp); } /* * udp_icmp_error_ipv6 is called by udp_icmp_error to process ICMP for IPv6. * Generates the appropriate T_UDERROR_IND for permanent (non-transient) errors. * Assumes that IP has pulled up all the extension headers as well as the * ICMPv6 header. */ static void udp_icmp_error_ipv6(queue_t *q, mblk_t *mp) { icmp6_t *icmp6; ip6_t *ip6h, *outer_ip6h; uint16_t iph_hdr_length; uint8_t *nexthdrp; udpha_t *udpha; sin6_t sin6; mblk_t *mp1; int error = 0; udp_t *udp = Q_TO_UDP(q); udp_stack_t *us = udp->udp_us; outer_ip6h = (ip6_t *)mp->b_rptr; if (outer_ip6h->ip6_nxt != IPPROTO_ICMPV6) iph_hdr_length = ip_hdr_length_v6(mp, outer_ip6h); else iph_hdr_length = IPV6_HDR_LEN; icmp6 = (icmp6_t *)&mp->b_rptr[iph_hdr_length]; ip6h = (ip6_t *)&icmp6[1]; if (!ip_hdr_length_nexthdr_v6(mp, ip6h, &iph_hdr_length, &nexthdrp)) { freemsg(mp); return; } udpha = (udpha_t *)((char *)ip6h + iph_hdr_length); switch (icmp6->icmp6_type) { case ICMP6_DST_UNREACH: switch (icmp6->icmp6_code) { case ICMP6_DST_UNREACH_NOPORT: error = ECONNREFUSED; break; case ICMP6_DST_UNREACH_ADMIN: case ICMP6_DST_UNREACH_NOROUTE: case ICMP6_DST_UNREACH_BEYONDSCOPE: case ICMP6_DST_UNREACH_ADDR: /* Transient errors */ break; default: break; } break; case ICMP6_PACKET_TOO_BIG: { struct T_unitdata_ind *tudi; struct T_opthdr *toh; size_t udi_size; mblk_t *newmp; t_scalar_t opt_length = sizeof (struct T_opthdr) + sizeof (struct ip6_mtuinfo); sin6_t *sin6; struct ip6_mtuinfo *mtuinfo; /* * If the application has requested to receive path mtu * information, send up an empty message containing an * IPV6_PATHMTU ancillary data item. */ if (!udp->udp_ipv6_recvpathmtu) break; udi_size = sizeof (struct T_unitdata_ind) + sizeof (sin6_t) + opt_length; if ((newmp = allocb(udi_size, BPRI_MED)) == NULL) { BUMP_MIB(&us->us_udp_mib, udpInErrors); break; } /* * newmp->b_cont is left to NULL on purpose. This is an * empty message containing only ancillary data. */ newmp->b_datap->db_type = M_PROTO; tudi = (struct T_unitdata_ind *)newmp->b_rptr; newmp->b_wptr = (uchar_t *)tudi + udi_size; tudi->PRIM_type = T_UNITDATA_IND; tudi->SRC_length = sizeof (sin6_t); tudi->SRC_offset = sizeof (struct T_unitdata_ind); tudi->OPT_offset = tudi->SRC_offset + sizeof (sin6_t); tudi->OPT_length = opt_length; sin6 = (sin6_t *)&tudi[1]; bzero(sin6, sizeof (sin6_t)); sin6->sin6_family = AF_INET6; sin6->sin6_addr = udp->udp_v6dst; toh = (struct T_opthdr *)&sin6[1]; toh->level = IPPROTO_IPV6; toh->name = IPV6_PATHMTU; toh->len = opt_length; toh->status = 0; mtuinfo = (struct ip6_mtuinfo *)&toh[1]; bzero(mtuinfo, sizeof (struct ip6_mtuinfo)); mtuinfo->ip6m_addr.sin6_family = AF_INET6; mtuinfo->ip6m_addr.sin6_addr = ip6h->ip6_dst; mtuinfo->ip6m_mtu = icmp6->icmp6_mtu; /* * We've consumed everything we need from the original * message. Free it, then send our empty message. */ freemsg(mp); putnext(q, newmp); return; } case ICMP6_TIME_EXCEEDED: /* Transient errors */ break; case ICMP6_PARAM_PROB: /* If this corresponds to an ICMP_PROTOCOL_UNREACHABLE */ if (icmp6->icmp6_code == ICMP6_PARAMPROB_NEXTHEADER && (uchar_t *)ip6h + icmp6->icmp6_pptr == (uchar_t *)nexthdrp) { error = ECONNREFUSED; break; } break; } if (error == 0) { freemsg(mp); return; } /* * Deliver T_UDERROR_IND when the application has asked for it. * The socket layer enables this automatically when connected. */ if (!udp->udp_dgram_errind) { freemsg(mp); return; } sin6 = sin6_null; sin6.sin6_family = AF_INET6; sin6.sin6_addr = ip6h->ip6_dst; sin6.sin6_port = udpha->uha_dst_port; sin6.sin6_flowinfo = ip6h->ip6_vcf & ~IPV6_VERS_AND_FLOW_MASK; mp1 = mi_tpi_uderror_ind((char *)&sin6, sizeof (sin6_t), NULL, 0, error); if (mp1) putnext(q, mp1); freemsg(mp); } /* * This routine responds to T_ADDR_REQ messages. It is called by udp_wput. * The local address is filled in if endpoint is bound. The remote address * is filled in if remote address has been precified ("connected endpoint") * (The concept of connected CLTS sockets is alien to published TPI * but we support it anyway). */ static void udp_addr_req(queue_t *q, mblk_t *mp) { sin_t *sin; sin6_t *sin6; mblk_t *ackmp; struct T_addr_ack *taa; udp_t *udp = Q_TO_UDP(q); /* Make it large enough for worst case */ ackmp = reallocb(mp, sizeof (struct T_addr_ack) + 2 * sizeof (sin6_t), 1); if (ackmp == NULL) { udp_err_ack(q, mp, TSYSERR, ENOMEM); return; } taa = (struct T_addr_ack *)ackmp->b_rptr; bzero(taa, sizeof (struct T_addr_ack)); ackmp->b_wptr = (uchar_t *)&taa[1]; taa->PRIM_type = T_ADDR_ACK; ackmp->b_datap->db_type = M_PCPROTO; rw_enter(&udp->udp_rwlock, RW_READER); /* * Note: Following code assumes 32 bit alignment of basic * data structures like sin_t and struct T_addr_ack. */ if (udp->udp_state != TS_UNBND) { /* * Fill in local address first */ taa->LOCADDR_offset = sizeof (*taa); if (udp->udp_family == AF_INET) { taa->LOCADDR_length = sizeof (sin_t); sin = (sin_t *)&taa[1]; /* Fill zeroes and then initialize non-zero fields */ *sin = sin_null; sin->sin_family = AF_INET; if (!IN6_IS_ADDR_V4MAPPED_ANY(&udp->udp_v6src) && !IN6_IS_ADDR_UNSPECIFIED(&udp->udp_v6src)) { IN6_V4MAPPED_TO_IPADDR(&udp->udp_v6src, sin->sin_addr.s_addr); } else { /* * INADDR_ANY * udp_v6src is not set, we might be bound to * broadcast/multicast. Use udp_bound_v6src as * local address instead (that could * also still be INADDR_ANY) */ IN6_V4MAPPED_TO_IPADDR(&udp->udp_bound_v6src, sin->sin_addr.s_addr); } sin->sin_port = udp->udp_port; ackmp->b_wptr = (uchar_t *)&sin[1]; if (udp->udp_state == TS_DATA_XFER) { /* * connected, fill remote address too */ taa->REMADDR_length = sizeof (sin_t); /* assumed 32-bit alignment */ taa->REMADDR_offset = taa->LOCADDR_offset + taa->LOCADDR_length; sin = (sin_t *)(ackmp->b_rptr + taa->REMADDR_offset); /* initialize */ *sin = sin_null; sin->sin_family = AF_INET; sin->sin_addr.s_addr = V4_PART_OF_V6(udp->udp_v6dst); sin->sin_port = udp->udp_dstport; ackmp->b_wptr = (uchar_t *)&sin[1]; } } else { taa->LOCADDR_length = sizeof (sin6_t); sin6 = (sin6_t *)&taa[1]; /* Fill zeroes and then initialize non-zero fields */ *sin6 = sin6_null; sin6->sin6_family = AF_INET6; if (!IN6_IS_ADDR_UNSPECIFIED(&udp->udp_v6src)) { sin6->sin6_addr = udp->udp_v6src; } else { /* * UNSPECIFIED * udp_v6src is not set, we might be bound to * broadcast/multicast. Use udp_bound_v6src as * local address instead (that could * also still be UNSPECIFIED) */ sin6->sin6_addr = udp->udp_bound_v6src; } sin6->sin6_port = udp->udp_port; ackmp->b_wptr = (uchar_t *)&sin6[1]; if (udp->udp_state == TS_DATA_XFER) { /* * connected, fill remote address too */ taa->REMADDR_length = sizeof (sin6_t); /* assumed 32-bit alignment */ taa->REMADDR_offset = taa->LOCADDR_offset + taa->LOCADDR_length; sin6 = (sin6_t *)(ackmp->b_rptr + taa->REMADDR_offset); /* initialize */ *sin6 = sin6_null; sin6->sin6_family = AF_INET6; sin6->sin6_addr = udp->udp_v6dst; sin6->sin6_port = udp->udp_dstport; ackmp->b_wptr = (uchar_t *)&sin6[1]; } ackmp->b_wptr = (uchar_t *)&sin6[1]; } } rw_exit(&udp->udp_rwlock); ASSERT(ackmp->b_wptr <= ackmp->b_datap->db_lim); qreply(q, ackmp); } static void udp_copy_info(struct T_info_ack *tap, udp_t *udp) { if (udp->udp_family == AF_INET) { *tap = udp_g_t_info_ack_ipv4; } else { *tap = udp_g_t_info_ack_ipv6; } tap->CURRENT_state = udp->udp_state; tap->OPT_size = udp_max_optsize; } /* * This routine responds to T_CAPABILITY_REQ messages. It is called by * udp_wput. Much of the T_CAPABILITY_ACK information is copied from * udp_g_t_info_ack. The current state of the stream is copied from * udp_state. */ static void udp_capability_req(queue_t *q, mblk_t *mp) { t_uscalar_t cap_bits1; struct T_capability_ack *tcap; udp_t *udp = Q_TO_UDP(q); cap_bits1 = ((struct T_capability_req *)mp->b_rptr)->CAP_bits1; mp = tpi_ack_alloc(mp, sizeof (struct T_capability_ack), mp->b_datap->db_type, T_CAPABILITY_ACK); if (!mp) return; tcap = (struct T_capability_ack *)mp->b_rptr; tcap->CAP_bits1 = 0; if (cap_bits1 & TC1_INFO) { udp_copy_info(&tcap->INFO_ack, udp); tcap->CAP_bits1 |= TC1_INFO; } qreply(q, mp); } /* * This routine responds to T_INFO_REQ messages. It is called by udp_wput. * Most of the T_INFO_ACK information is copied from udp_g_t_info_ack. * The current state of the stream is copied from udp_state. */ static void udp_info_req(queue_t *q, mblk_t *mp) { udp_t *udp = Q_TO_UDP(q); /* Create a T_INFO_ACK message. */ mp = tpi_ack_alloc(mp, sizeof (struct T_info_ack), M_PCPROTO, T_INFO_ACK); if (!mp) return; udp_copy_info((struct T_info_ack *)mp->b_rptr, udp); qreply(q, mp); } /* * IP recognizes seven kinds of bind requests: * * - A zero-length address binds only to the protocol number. * * - A 4-byte address is treated as a request to * validate that the address is a valid local IPv4 * address, appropriate for an application to bind to. * IP does the verification, but does not make any note * of the address at this time. * * - A 16-byte address contains is treated as a request * to validate a local IPv6 address, as the 4-byte * address case above. * * - A 16-byte sockaddr_in to validate the local IPv4 address and also * use it for the inbound fanout of packets. * * - A 24-byte sockaddr_in6 to validate the local IPv6 address and also * use it for the inbound fanout of packets. * * - A 12-byte address (ipa_conn_t) containing complete IPv4 fanout * information consisting of local and remote addresses * and ports. In this case, the addresses are both * validated as appropriate for this operation, and, if * so, the information is retained for use in the * inbound fanout. * * - A 36-byte address address (ipa6_conn_t) containing complete IPv6 * fanout information, like the 12-byte case above. * * IP will also fill in the IRE request mblk with information * regarding our peer. In all cases, we notify IP of our protocol * type by appending a single protocol byte to the bind request. */ static mblk_t * udp_ip_bind_mp(udp_t *udp, t_scalar_t bind_prim, t_scalar_t addr_length) { char *cp; mblk_t *mp; struct T_bind_req *tbr; ipa_conn_t *ac; ipa6_conn_t *ac6; sin_t *sin; sin6_t *sin6; ASSERT(bind_prim == O_T_BIND_REQ || bind_prim == T_BIND_REQ); ASSERT(RW_LOCK_HELD(&udp->udp_rwlock)); mp = allocb(sizeof (*tbr) + addr_length + 1, BPRI_HI); if (!mp) return (mp); mp->b_datap->db_type = M_PROTO; tbr = (struct T_bind_req *)mp->b_rptr; tbr->PRIM_type = bind_prim; tbr->ADDR_offset = sizeof (*tbr); tbr->CONIND_number = 0; tbr->ADDR_length = addr_length; cp = (char *)&tbr[1]; switch (addr_length) { case sizeof (ipa_conn_t): ASSERT(udp->udp_family == AF_INET); /* Append a request for an IRE */ mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); if (!mp->b_cont) { freemsg(mp); return (NULL); } mp->b_cont->b_wptr += sizeof (ire_t); mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; /* cp known to be 32 bit aligned */ ac = (ipa_conn_t *)cp; ac->ac_laddr = V4_PART_OF_V6(udp->udp_v6src); ac->ac_faddr = V4_PART_OF_V6(udp->udp_v6dst); ac->ac_fport = udp->udp_dstport; ac->ac_lport = udp->udp_port; break; case sizeof (ipa6_conn_t): ASSERT(udp->udp_family == AF_INET6); /* Append a request for an IRE */ mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); if (!mp->b_cont) { freemsg(mp); return (NULL); } mp->b_cont->b_wptr += sizeof (ire_t); mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; /* cp known to be 32 bit aligned */ ac6 = (ipa6_conn_t *)cp; ac6->ac6_laddr = udp->udp_v6src; ac6->ac6_faddr = udp->udp_v6dst; ac6->ac6_fport = udp->udp_dstport; ac6->ac6_lport = udp->udp_port; break; case sizeof (sin_t): ASSERT(udp->udp_family == AF_INET); /* Append a request for an IRE */ mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); if (!mp->b_cont) { freemsg(mp); return (NULL); } mp->b_cont->b_wptr += sizeof (ire_t); mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; sin = (sin_t *)cp; *sin = sin_null; sin->sin_family = AF_INET; sin->sin_addr.s_addr = V4_PART_OF_V6(udp->udp_bound_v6src); sin->sin_port = udp->udp_port; break; case sizeof (sin6_t): ASSERT(udp->udp_family == AF_INET6); /* Append a request for an IRE */ mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); if (!mp->b_cont) { freemsg(mp); return (NULL); } mp->b_cont->b_wptr += sizeof (ire_t); mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; sin6 = (sin6_t *)cp; *sin6 = sin6_null; sin6->sin6_family = AF_INET6; sin6->sin6_addr = udp->udp_bound_v6src; sin6->sin6_port = udp->udp_port; break; } /* Add protocol number to end */ cp[addr_length] = (char)IPPROTO_UDP; mp->b_wptr = (uchar_t *)&cp[addr_length + 1]; return (mp); } /* For /dev/udp aka AF_INET open */ static int udp_openv4(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { return (udp_open(q, devp, flag, sflag, credp, B_FALSE)); } /* For /dev/udp6 aka AF_INET6 open */ static int udp_openv6(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) { return (udp_open(q, devp, flag, sflag, credp, B_TRUE)); } /* * This is the open routine for udp. It allocates a udp_t structure for * the stream and, on the first open of the module, creates an ND table. */ /*ARGSUSED2*/ static int udp_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp, boolean_t isv6) { int err; udp_t *udp; conn_t *connp; dev_t conn_dev; zoneid_t zoneid; netstack_t *ns; udp_stack_t *us; vmem_t *minor_arena; TRACE_1(TR_FAC_UDP, TR_UDP_OPEN, "udp_open: q %p", q); /* If the stream is already open, return immediately. */ if (q->q_ptr != NULL) return (0); if (sflag == MODOPEN) return (EINVAL); ns = netstack_find_by_cred(credp); ASSERT(ns != NULL); us = ns->netstack_udp; ASSERT(us != NULL); /* * For exclusive stacks we set the zoneid to zero * to make UDP operate as if in the global zone. */ if (ns->netstack_stackid != GLOBAL_NETSTACKID) zoneid = GLOBAL_ZONEID; else zoneid = crgetzoneid(credp); if ((ip_minor_arena_la != NULL) && (flag & SO_SOCKSTR) && ((conn_dev = inet_minor_alloc(ip_minor_arena_la)) != 0)) { 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 ((conn_dev = inet_minor_alloc(ip_minor_arena_sa)) == 0) { netstack_rele(ns); return (EBUSY); } minor_arena = ip_minor_arena_sa; } *devp = makedevice(getemajor(*devp), (minor_t)conn_dev); connp = ipcl_conn_create(IPCL_UDPCONN, KM_SLEEP, ns); connp->conn_dev = conn_dev; connp->conn_minor_arena = minor_arena; udp = connp->conn_udp; /* * ipcl_conn_create did a netstack_hold. Undo the hold that was * done by netstack_find_by_cred() */ netstack_rele(ns); /* * Initialize the udp_t structure for this stream. */ q->q_ptr = connp; WR(q)->q_ptr = connp; connp->conn_rq = q; connp->conn_wq = WR(q); rw_enter(&udp->udp_rwlock, RW_WRITER); ASSERT(connp->conn_ulp == IPPROTO_UDP); ASSERT(connp->conn_udp == udp); ASSERT(udp->udp_connp == connp); /* Set the initial state of the stream and the privilege status. */ udp->udp_state = TS_UNBND; if (isv6) { udp->udp_family = AF_INET6; udp->udp_ipversion = IPV6_VERSION; udp->udp_max_hdr_len = IPV6_HDR_LEN + UDPH_SIZE; udp->udp_ttl = us->us_ipv6_hoplimit; connp->conn_af_isv6 = B_TRUE; connp->conn_flags |= IPCL_ISV6; } else { udp->udp_family = AF_INET; udp->udp_ipversion = IPV4_VERSION; udp->udp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + UDPH_SIZE; udp->udp_ttl = us->us_ipv4_ttl; connp->conn_af_isv6 = B_FALSE; connp->conn_flags &= ~IPCL_ISV6; } udp->udp_multicast_ttl = IP_DEFAULT_MULTICAST_TTL; udp->udp_pending_op = -1; connp->conn_multicast_loop = IP_DEFAULT_MULTICAST_LOOP; connp->conn_zoneid = zoneid; udp->udp_open_time = lbolt64; udp->udp_open_pid = curproc->p_pid; /* * If the caller has the process-wide flag set, then default to MAC * exempt mode. This allows read-down to unlabeled hosts. */ if (getpflags(NET_MAC_AWARE, credp) != 0) connp->conn_mac_exempt = B_TRUE; if (flag & SO_SOCKSTR) { connp->conn_flags |= IPCL_SOCKET; udp->udp_issocket = B_TRUE; udp->udp_direct_sockfs = B_TRUE; } connp->conn_ulp_labeled = is_system_labeled(); udp->udp_us = us; q->q_hiwat = us->us_recv_hiwat; WR(q)->q_hiwat = us->us_xmit_hiwat; WR(q)->q_lowat = us->us_xmit_lowat; connp->conn_recv = udp_input; crhold(credp); connp->conn_cred = credp; mutex_enter(&connp->conn_lock); connp->conn_state_flags &= ~CONN_INCIPIENT; mutex_exit(&connp->conn_lock); qprocson(q); if (udp->udp_family == AF_INET6) { /* Build initial header template for transmit */ if ((err = udp_build_hdrs(udp)) != 0) { rw_exit(&udp->udp_rwlock); qprocsoff(q); ipcl_conn_destroy(connp); return (err); } } rw_exit(&udp->udp_rwlock); /* Set the Stream head write offset and high watermark. */ (void) mi_set_sth_wroff(q, udp->udp_max_hdr_len + us->us_wroff_extra); (void) mi_set_sth_hiwat(q, udp_set_rcv_hiwat(udp, q->q_hiwat)); return (0); } /* * Which UDP options OK to set through T_UNITDATA_REQ... */ /* ARGSUSED */ static boolean_t udp_opt_allow_udr_set(t_scalar_t level, t_scalar_t name) { return (B_TRUE); } /* * This routine gets default values of certain options whose default * values are maintained by protcol specific code */ /* ARGSUSED */ int udp_opt_default(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr) { udp_t *udp = Q_TO_UDP(q); udp_stack_t *us = udp->udp_us; int *i1 = (int *)ptr; switch (level) { case IPPROTO_IP: switch (name) { case IP_MULTICAST_TTL: *ptr = (uchar_t)IP_DEFAULT_MULTICAST_TTL; return (sizeof (uchar_t)); case IP_MULTICAST_LOOP: *ptr = (uchar_t)IP_DEFAULT_MULTICAST_LOOP; return (sizeof (uchar_t)); } break; case IPPROTO_IPV6: switch (name) { case IPV6_MULTICAST_HOPS: *i1 = IP_DEFAULT_MULTICAST_TTL; return (sizeof (int)); case IPV6_MULTICAST_LOOP: *i1 = IP_DEFAULT_MULTICAST_LOOP; return (sizeof (int)); case IPV6_UNICAST_HOPS: *i1 = us->us_ipv6_hoplimit; return (sizeof (int)); } break; } return (-1); } /* * This routine retrieves the current status of socket options. * It returns the size of the option retrieved. */ int udp_opt_get_locked(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr) { int *i1 = (int *)ptr; conn_t *connp; udp_t *udp; ip6_pkt_t *ipp; int len; udp_stack_t *us; connp = Q_TO_CONN(q); udp = connp->conn_udp; ipp = &udp->udp_sticky_ipp; us = udp->udp_us; switch (level) { case SOL_SOCKET: switch (name) { case SO_DEBUG: *i1 = udp->udp_debug; break; /* goto sizeof (int) option return */ case SO_REUSEADDR: *i1 = udp->udp_reuseaddr; break; /* goto sizeof (int) option return */ case SO_TYPE: *i1 = SOCK_DGRAM; break; /* goto sizeof (int) option return */ /* * The following three items are available here, * but are only meaningful to IP. */ case SO_DONTROUTE: *i1 = udp->udp_dontroute; break; /* goto sizeof (int) option return */ case SO_USELOOPBACK: *i1 = udp->udp_useloopback; break; /* goto sizeof (int) option return */ case SO_BROADCAST: *i1 = udp->udp_broadcast; break; /* goto sizeof (int) option return */ case SO_SNDBUF: *i1 = q->q_hiwat; break; /* goto sizeof (int) option return */ case SO_RCVBUF: *i1 = RD(q)->q_hiwat; break; /* goto sizeof (int) option return */ case SO_DGRAM_ERRIND: *i1 = udp->udp_dgram_errind; break; /* goto sizeof (int) option return */ case SO_RECVUCRED: *i1 = udp->udp_recvucred; break; /* goto sizeof (int) option return */ case SO_TIMESTAMP: *i1 = udp->udp_timestamp; break; /* goto sizeof (int) option return */ case SO_ANON_MLP: *i1 = connp->conn_anon_mlp; break; /* goto sizeof (int) option return */ case SO_MAC_EXEMPT: *i1 = connp->conn_mac_exempt; break; /* goto sizeof (int) option return */ case SO_ALLZONES: *i1 = connp->conn_allzones; break; /* goto sizeof (int) option return */ case SO_EXCLBIND: *i1 = udp->udp_exclbind ? SO_EXCLBIND : 0; break; case SO_PROTOTYPE: *i1 = IPPROTO_UDP; break; case SO_DOMAIN: *i1 = udp->udp_family; break; default: return (-1); } break; case IPPROTO_IP: if (udp->udp_family != AF_INET) return (-1); switch (name) { case IP_OPTIONS: case T_IP_OPTIONS: len = udp->udp_ip_rcv_options_len - udp->udp_label_len; if (len > 0) { bcopy(udp->udp_ip_rcv_options + udp->udp_label_len, ptr, len); } return (len); case IP_TOS: case T_IP_TOS: *i1 = (int)udp->udp_type_of_service; break; /* goto sizeof (int) option return */ case IP_TTL: *i1 = (int)udp->udp_ttl; break; /* goto sizeof (int) option return */ case IP_DHCPINIT_IF: return (-EINVAL); case IP_NEXTHOP: case IP_RECVPKTINFO: /* * This also handles IP_PKTINFO. * IP_PKTINFO and IP_RECVPKTINFO have the same value. * Differentiation is based on the size of the argument * passed in. * This option is handled in IP which will return an * error for IP_PKTINFO as it's not supported as a * sticky option. */ return (-EINVAL); case IP_MULTICAST_IF: /* 0 address if not set */ *(ipaddr_t *)ptr = udp->udp_multicast_if_addr; return (sizeof (ipaddr_t)); case IP_MULTICAST_TTL: *(uchar_t *)ptr = udp->udp_multicast_ttl; return (sizeof (uchar_t)); case IP_MULTICAST_LOOP: *ptr = connp->conn_multicast_loop; return (sizeof (uint8_t)); case IP_RECVOPTS: *i1 = udp->udp_recvopts; break; /* goto sizeof (int) option return */ case IP_RECVDSTADDR: *i1 = udp->udp_recvdstaddr; break; /* goto sizeof (int) option return */ case IP_RECVIF: *i1 = udp->udp_recvif; break; /* goto sizeof (int) option return */ case IP_RECVSLLA: *i1 = udp->udp_recvslla; break; /* goto sizeof (int) option return */ case IP_RECVTTL: *i1 = udp->udp_recvttl; break; /* goto sizeof (int) option return */ case IP_ADD_MEMBERSHIP: case IP_DROP_MEMBERSHIP: case IP_BLOCK_SOURCE: case IP_UNBLOCK_SOURCE: case IP_ADD_SOURCE_MEMBERSHIP: case IP_DROP_SOURCE_MEMBERSHIP: case MCAST_JOIN_GROUP: case MCAST_LEAVE_GROUP: case MCAST_BLOCK_SOURCE: case MCAST_UNBLOCK_SOURCE: case MCAST_JOIN_SOURCE_GROUP: case MCAST_LEAVE_SOURCE_GROUP: case IP_DONTFAILOVER_IF: /* cannot "get" the value for these */ return (-1); case IP_BOUND_IF: /* Zero if not set */ *i1 = udp->udp_bound_if; break; /* goto sizeof (int) option return */ case IP_UNSPEC_SRC: *i1 = udp->udp_unspec_source; break; /* goto sizeof (int) option return */ case IP_BROADCAST_TTL: *(uchar_t *)ptr = connp->conn_broadcast_ttl; return (sizeof (uchar_t)); default: return (-1); } break; case IPPROTO_IPV6: if (udp->udp_family != AF_INET6) return (-1); switch (name) { case IPV6_UNICAST_HOPS: *i1 = (unsigned int)udp->udp_ttl; break; /* goto sizeof (int) option return */ case IPV6_MULTICAST_IF: /* 0 index if not set */ *i1 = udp->udp_multicast_if_index; break; /* goto sizeof (int) option return */ case IPV6_MULTICAST_HOPS: *i1 = udp->udp_multicast_ttl; break; /* goto sizeof (int) option return */ case IPV6_MULTICAST_LOOP: *i1 = connp->conn_multicast_loop; break; /* goto sizeof (int) option return */ case IPV6_JOIN_GROUP: case IPV6_LEAVE_GROUP: case MCAST_JOIN_GROUP: case MCAST_LEAVE_GROUP: case MCAST_BLOCK_SOURCE: case MCAST_UNBLOCK_SOURCE: case MCAST_JOIN_SOURCE_GROUP: case MCAST_LEAVE_SOURCE_GROUP: /* cannot "get" the value for these */ return (-1); case IPV6_BOUND_IF: /* Zero if not set */ *i1 = udp->udp_bound_if; break; /* goto sizeof (int) option return */ case IPV6_UNSPEC_SRC: *i1 = udp->udp_unspec_source; break; /* goto sizeof (int) option return */ case IPV6_RECVPKTINFO: *i1 = udp->udp_ip_recvpktinfo; break; /* goto sizeof (int) option return */ case IPV6_RECVTCLASS: *i1 = udp->udp_ipv6_recvtclass; break; /* goto sizeof (int) option return */ case IPV6_RECVPATHMTU: *i1 = udp->udp_ipv6_recvpathmtu; break; /* goto sizeof (int) option return */ case IPV6_RECVHOPLIMIT: *i1 = udp->udp_ipv6_recvhoplimit; break; /* goto sizeof (int) option return */ case IPV6_RECVHOPOPTS: *i1 = udp->udp_ipv6_recvhopopts; break; /* goto sizeof (int) option return */ case IPV6_RECVDSTOPTS: *i1 = udp->udp_ipv6_recvdstopts; break; /* goto sizeof (int) option return */ case _OLD_IPV6_RECVDSTOPTS: *i1 = udp->udp_old_ipv6_recvdstopts; break; /* goto sizeof (int) option return */ case IPV6_RECVRTHDRDSTOPTS: *i1 = udp->udp_ipv6_recvrthdrdstopts; break; /* goto sizeof (int) option return */ case IPV6_RECVRTHDR: *i1 = udp->udp_ipv6_recvrthdr; break; /* goto sizeof (int) option return */ case IPV6_PKTINFO: { /* XXX assumes that caller has room for max size! */ struct in6_pktinfo *pkti; pkti = (struct in6_pktinfo *)ptr; if (ipp->ipp_fields & IPPF_IFINDEX) pkti->ipi6_ifindex = ipp->ipp_ifindex; else pkti->ipi6_ifindex = 0; if (ipp->ipp_fields & IPPF_ADDR) pkti->ipi6_addr = ipp->ipp_addr; else pkti->ipi6_addr = ipv6_all_zeros; return (sizeof (struct in6_pktinfo)); } case IPV6_TCLASS: if (ipp->ipp_fields & IPPF_TCLASS) *i1 = ipp->ipp_tclass; else *i1 = IPV6_FLOW_TCLASS( IPV6_DEFAULT_VERS_AND_FLOW); break; /* goto sizeof (int) option return */ case IPV6_NEXTHOP: { sin6_t *sin6 = (sin6_t *)ptr; if (!(ipp->ipp_fields & IPPF_NEXTHOP)) return (0); *sin6 = sin6_null; sin6->sin6_family = AF_INET6; sin6->sin6_addr = ipp->ipp_nexthop; return (sizeof (sin6_t)); } case IPV6_HOPOPTS: if (!(ipp->ipp_fields & IPPF_HOPOPTS)) return (0); if (ipp->ipp_hopoptslen <= udp->udp_label_len_v6) return (0); /* * The cipso/label option is added by kernel. * User is not usually aware of this option. * We copy out the hbh opt after the label option. */ bcopy((char *)ipp->ipp_hopopts + udp->udp_label_len_v6, ptr, ipp->ipp_hopoptslen - udp->udp_label_len_v6); if (udp->udp_label_len_v6 > 0) { ptr[0] = ((char *)ipp->ipp_hopopts)[0]; ptr[1] = (ipp->ipp_hopoptslen - udp->udp_label_len_v6 + 7) / 8 - 1; } return (ipp->ipp_hopoptslen - udp->udp_label_len_v6); case IPV6_RTHDRDSTOPTS: if (!(ipp->ipp_fields & IPPF_RTDSTOPTS)) return (0); bcopy(ipp->ipp_rtdstopts, ptr, ipp->ipp_rtdstoptslen); return (ipp->ipp_rtdstoptslen); case IPV6_RTHDR: if (!(ipp->ipp_fields & IPPF_RTHDR)) return (0); bcopy(ipp->ipp_rthdr, ptr, ipp->ipp_rthdrlen); return (ipp->ipp_rthdrlen); case IPV6_DSTOPTS: if (!(ipp->ipp_fields & IPPF_DSTOPTS)) return (0); bcopy(ipp->ipp_dstopts, ptr, ipp->ipp_dstoptslen); return (ipp->ipp_dstoptslen); case IPV6_PATHMTU: return (ip_fill_mtuinfo(&udp->udp_v6dst, udp->udp_dstport, (struct ip6_mtuinfo *)ptr, us->us_netstack)); default: return (-1); } break; case IPPROTO_UDP: switch (name) { case UDP_ANONPRIVBIND: *i1 = udp->udp_anon_priv_bind; break; case UDP_EXCLBIND: *i1 = udp->udp_exclbind ? UDP_EXCLBIND : 0; break; case UDP_RCVHDR: *i1 = udp->udp_rcvhdr ? 1 : 0; break; case UDP_NAT_T_ENDPOINT: *i1 = udp->udp_nat_t_endpoint; break; default: return (-1); } break; default: return (-1); } return (sizeof (int)); } int udp_opt_get(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr) { udp_t *udp; int err; udp = Q_TO_UDP(q); rw_enter(&udp->udp_rwlock, RW_READER); err = udp_opt_get_locked(q, level, name, ptr); rw_exit(&udp->udp_rwlock); return (err); } /* * This routine sets socket options. */ /* ARGSUSED */ int udp_opt_set_locked(queue_t *q, uint_t optset_context, int level, int name, uint_t inlen, uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp, void *thisdg_attrs, cred_t *cr, mblk_t *mblk) { udpattrs_t *attrs = thisdg_attrs; int *i1 = (int *)invalp; boolean_t onoff = (*i1 == 0) ? 0 : 1; boolean_t checkonly; int error; conn_t *connp; udp_t *udp; uint_t newlen; udp_stack_t *us; size_t sth_wroff; connp = Q_TO_CONN(q); udp = connp->conn_udp; us = udp->udp_us; switch (optset_context) { case SETFN_OPTCOM_CHECKONLY: checkonly = B_TRUE; /* * Note: Implies T_CHECK semantics for T_OPTCOM_REQ * inlen != 0 implies value supplied and * we have to "pretend" to set it. * inlen == 0 implies that there is no * value part in T_CHECK request and just validation * done elsewhere should be enough, we just return here. */ if (inlen == 0) { *outlenp = 0; return (0); } break; case SETFN_OPTCOM_NEGOTIATE: checkonly = B_FALSE; break; case SETFN_UD_NEGOTIATE: case SETFN_CONN_NEGOTIATE: checkonly = B_FALSE; /* * Negotiating local and "association-related" options * through T_UNITDATA_REQ. * * Following routine can filter out ones we do not * want to be "set" this way. */ if (!udp_opt_allow_udr_set(level, name)) { *outlenp = 0; return (EINVAL); } break; default: /* * We should never get here */ *outlenp = 0; return (EINVAL); } ASSERT((optset_context != SETFN_OPTCOM_CHECKONLY) || (optset_context == SETFN_OPTCOM_CHECKONLY && inlen != 0)); /* * For fixed length options, no sanity check * of passed in length is done. It is assumed *_optcom_req() * routines do the right thing. */ switch (level) { case SOL_SOCKET: switch (name) { case SO_REUSEADDR: if (!checkonly) udp->udp_reuseaddr = onoff; break; case SO_DEBUG: if (!checkonly) udp->udp_debug = onoff; break; /* * The following three items are available here, * but are only meaningful to IP. */ case SO_DONTROUTE: if (!checkonly) udp->udp_dontroute = onoff; break; case SO_USELOOPBACK: if (!checkonly) udp->udp_useloopback = onoff; break; case SO_BROADCAST: if (!checkonly) udp->udp_broadcast = onoff; break; case SO_SNDBUF: if (*i1 > us->us_max_buf) { *outlenp = 0; return (ENOBUFS); } if (!checkonly) { q->q_hiwat = *i1; } break; case SO_RCVBUF: if (*i1 > us->us_max_buf) { *outlenp = 0; return (ENOBUFS); } if (!checkonly) { RD(q)->q_hiwat = *i1; rw_exit(&udp->udp_rwlock); (void) mi_set_sth_hiwat(RD(q), udp_set_rcv_hiwat(udp, *i1)); rw_enter(&udp->udp_rwlock, RW_WRITER); } break; case SO_DGRAM_ERRIND: if (!checkonly) udp->udp_dgram_errind = onoff; break; case SO_RECVUCRED: if (!checkonly) udp->udp_recvucred = onoff; break; case SO_ALLZONES: /* * "soft" error (negative) * option not handled at this level * Do not modify *outlenp. */ return (-EINVAL); case SO_TIMESTAMP: if (!checkonly) udp->udp_timestamp = onoff; break; case SO_ANON_MLP: /* Pass option along to IP level for handling */ return (-EINVAL); case SO_MAC_EXEMPT: /* Pass option along to IP level for handling */ return (-EINVAL); case SCM_UCRED: { struct ucred_s *ucr; cred_t *cr, *newcr; ts_label_t *tsl; /* * Only sockets that have proper privileges and are * bound to MLPs will have any other value here, so * this implicitly tests for privilege to set label. */ if (connp->conn_mlp_type == mlptSingle) break; ucr = (struct ucred_s *)invalp; if (inlen != ucredsize || ucr->uc_labeloff < sizeof (*ucr) || ucr->uc_labeloff + sizeof (bslabel_t) > inlen) return (EINVAL); if (!checkonly) { mblk_t *mb; if (attrs == NULL || (mb = attrs->udpattr_mb) == NULL) return (EINVAL); if ((cr = DB_CRED(mb)) == NULL) cr = udp->udp_connp->conn_cred; ASSERT(cr != NULL); if ((tsl = crgetlabel(cr)) == NULL) return (EINVAL); newcr = copycred_from_bslabel(cr, UCLABEL(ucr), tsl->tsl_doi, KM_NOSLEEP); if (newcr == NULL) return (ENOSR); mblk_setcred(mb, newcr); attrs->udpattr_credset = B_TRUE; crfree(newcr); } break; } case SO_EXCLBIND: if (!checkonly) udp->udp_exclbind = onoff; break; default: *outlenp = 0; return (EINVAL); } break; case IPPROTO_IP: if (udp->udp_family != AF_INET) { *outlenp = 0; return (ENOPROTOOPT); } switch (name) { case IP_OPTIONS: case T_IP_OPTIONS: /* Save options for use by IP. */ newlen = inlen + udp->udp_label_len; if ((inlen & 0x3) || newlen > IP_MAX_OPT_LENGTH) { *outlenp = 0; return (EINVAL); } if (checkonly) break; /* * Update the stored options taking into account * any CIPSO option which we should not overwrite. */ if (!tsol_option_set(&udp->udp_ip_snd_options, &udp->udp_ip_snd_options_len, udp->udp_label_len, invalp, inlen)) { *outlenp = 0; return (ENOMEM); } udp->udp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + UDPH_SIZE + udp->udp_ip_snd_options_len; sth_wroff = udp->udp_max_hdr_len + us->us_wroff_extra; rw_exit(&udp->udp_rwlock); (void) mi_set_sth_wroff(RD(q), sth_wroff); rw_enter(&udp->udp_rwlock, RW_WRITER); break; case IP_TTL: if (!checkonly) { udp->udp_ttl = (uchar_t)*i1; } break; case IP_TOS: case T_IP_TOS: if (!checkonly) { udp->udp_type_of_service = (uchar_t)*i1; } break; case IP_MULTICAST_IF: { /* * TODO should check OPTMGMT reply and undo this if * there is an error. */ struct in_addr *inap = (struct in_addr *)invalp; if (!checkonly) { udp->udp_multicast_if_addr = inap->s_addr; } break; } case IP_MULTICAST_TTL: if (!checkonly) udp->udp_multicast_ttl = *invalp; break; case IP_MULTICAST_LOOP: if (!checkonly) connp->conn_multicast_loop = *invalp; break; case IP_RECVOPTS: if (!checkonly) udp->udp_recvopts = onoff; break; case IP_RECVDSTADDR: if (!checkonly) udp->udp_recvdstaddr = onoff; break; case IP_RECVIF: if (!checkonly) udp->udp_recvif = onoff; break; case IP_RECVSLLA: if (!checkonly) udp->udp_recvslla = onoff; break; case IP_RECVTTL: if (!checkonly) udp->udp_recvttl = onoff; break; case IP_PKTINFO: { /* * This also handles IP_RECVPKTINFO. * IP_PKTINFO and IP_RECVPKTINFO have same value. * Differentiation is based on the size of the * argument passed in. */ struct in_pktinfo *pktinfop; ip4_pkt_t *attr_pktinfop; if (checkonly) break; if (inlen == sizeof (int)) { /* * This is IP_RECVPKTINFO option. * Keep a local copy of whether this option is * set or not and pass it down to IP for * processing. */ udp->udp_ip_recvpktinfo = onoff; return (-EINVAL); } if (attrs == NULL || (attr_pktinfop = attrs->udpattr_ipp4) == NULL) { /* * sticky option or no buffer to return * the results. */ return (EINVAL); } if (inlen != sizeof (struct in_pktinfo)) return (EINVAL); pktinfop = (struct in_pktinfo *)invalp; /* * At least one of the values should be specified */ if (pktinfop->ipi_ifindex == 0 && pktinfop->ipi_spec_dst.s_addr == INADDR_ANY) { return (EINVAL); } attr_pktinfop->ip4_addr = pktinfop->ipi_spec_dst.s_addr; attr_pktinfop->ip4_ill_index = pktinfop->ipi_ifindex; break; } case IP_ADD_MEMBERSHIP: case IP_DROP_MEMBERSHIP: case IP_BLOCK_SOURCE: case IP_UNBLOCK_SOURCE: case IP_ADD_SOURCE_MEMBERSHIP: case IP_DROP_SOURCE_MEMBERSHIP: case MCAST_JOIN_GROUP: case MCAST_LEAVE_GROUP: case MCAST_BLOCK_SOURCE: case MCAST_UNBLOCK_SOURCE: case MCAST_JOIN_SOURCE_GROUP: case MCAST_LEAVE_SOURCE_GROUP: case IP_SEC_OPT: case IP_NEXTHOP: case IP_DHCPINIT_IF: /* * "soft" error (negative) * option not handled at this level * Do not modify *outlenp. */ return (-EINVAL); case IP_BOUND_IF: if (!checkonly) udp->udp_bound_if = *i1; break; case IP_UNSPEC_SRC: if (!checkonly) udp->udp_unspec_source = onoff; break; case IP_BROADCAST_TTL: if (!checkonly) connp->conn_broadcast_ttl = *invalp; break; default: *outlenp = 0; return (EINVAL); } break; case IPPROTO_IPV6: { ip6_pkt_t *ipp; boolean_t sticky; if (udp->udp_family != AF_INET6) { *outlenp = 0; return (ENOPROTOOPT); } /* * Deal with both sticky options and ancillary data */ sticky = B_FALSE; if (attrs == NULL || (ipp = attrs->udpattr_ipp6) == NULL) { /* sticky options, or none */ ipp = &udp->udp_sticky_ipp; sticky = B_TRUE; } switch (name) { case IPV6_MULTICAST_IF: if (!checkonly) udp->udp_multicast_if_index = *i1; break; case IPV6_UNICAST_HOPS: /* -1 means use default */ if (*i1 < -1 || *i1 > IPV6_MAX_HOPS) { *outlenp = 0; return (EINVAL); } if (!checkonly) { if (*i1 == -1) { udp->udp_ttl = ipp->ipp_unicast_hops = us->us_ipv6_hoplimit; ipp->ipp_fields &= ~IPPF_UNICAST_HOPS; /* Pass modified value to IP. */ *i1 = udp->udp_ttl; } else { udp->udp_ttl = ipp->ipp_unicast_hops = (uint8_t)*i1; ipp->ipp_fields |= IPPF_UNICAST_HOPS; } /* Rebuild the header template */ error = udp_build_hdrs(udp); if (error != 0) { *outlenp = 0; return (error); } } break; case IPV6_MULTICAST_HOPS: /* -1 means use default */ if (*i1 < -1 || *i1 > IPV6_MAX_HOPS) { *outlenp = 0; return (EINVAL); } if (!checkonly) { if (*i1 == -1) { udp->udp_multicast_ttl = ipp->ipp_multicast_hops = IP_DEFAULT_MULTICAST_TTL; ipp->ipp_fields &= ~IPPF_MULTICAST_HOPS; /* Pass modified value to IP. */ *i1 = udp->udp_multicast_ttl; } else { udp->udp_multicast_ttl = ipp->ipp_multicast_hops = (uint8_t)*i1; ipp->ipp_fields |= IPPF_MULTICAST_HOPS; } } break; case IPV6_MULTICAST_LOOP: if (*i1 != 0 && *i1 != 1) { *outlenp = 0; return (EINVAL); } if (!checkonly) connp->conn_multicast_loop = *i1; break; case IPV6_JOIN_GROUP: case IPV6_LEAVE_GROUP: case MCAST_JOIN_GROUP: case MCAST_LEAVE_GROUP: case MCAST_BLOCK_SOURCE: case MCAST_UNBLOCK_SOURCE: case MCAST_JOIN_SOURCE_GROUP: case MCAST_LEAVE_SOURCE_GROUP: /* * "soft" error (negative) * option not handled at this level * Note: Do not modify *outlenp */ return (-EINVAL); case IPV6_BOUND_IF: if (!checkonly) udp->udp_bound_if = *i1; break; case IPV6_UNSPEC_SRC: if (!checkonly) udp->udp_unspec_source = onoff; break; /* * Set boolean switches for ancillary data delivery */ case IPV6_RECVPKTINFO: if (!checkonly) udp->udp_ip_recvpktinfo = onoff; break; case IPV6_RECVTCLASS: if (!checkonly) { udp->udp_ipv6_recvtclass = onoff; } break; case IPV6_RECVPATHMTU: if (!checkonly) { udp->udp_ipv6_recvpathmtu = onoff; } break; case IPV6_RECVHOPLIMIT: if (!checkonly) udp->udp_ipv6_recvhoplimit = onoff; break; case IPV6_RECVHOPOPTS: if (!checkonly) udp->udp_ipv6_recvhopopts = onoff; break; case IPV6_RECVDSTOPTS: if (!checkonly) udp->udp_ipv6_recvdstopts = onoff; break; case _OLD_IPV6_RECVDSTOPTS: if (!checkonly) udp->udp_old_ipv6_recvdstopts = onoff; break; case IPV6_RECVRTHDRDSTOPTS: if (!checkonly) udp->udp_ipv6_recvrthdrdstopts = onoff; break; case IPV6_RECVRTHDR: if (!checkonly) udp->udp_ipv6_recvrthdr = onoff; break; /* * Set sticky options or ancillary data. * If sticky options, (re)build any extension headers * that might be needed as a result. */ case IPV6_PKTINFO: /* * The source address and ifindex are verified * in ip_opt_set(). For ancillary data the * source address is checked in ip_wput_v6. */ if (inlen != 0 && inlen != sizeof (struct in6_pktinfo)) return (EINVAL); if (checkonly) break; if (inlen == 0) { ipp->ipp_fields &= ~(IPPF_IFINDEX|IPPF_ADDR); ipp->ipp_sticky_ignored |= (IPPF_IFINDEX|IPPF_ADDR); } else { struct in6_pktinfo *pkti; pkti = (struct in6_pktinfo *)invalp; ipp->ipp_ifindex = pkti->ipi6_ifindex; ipp->ipp_addr = pkti->ipi6_addr; if (ipp->ipp_ifindex != 0) ipp->ipp_fields |= IPPF_IFINDEX; else ipp->ipp_fields &= ~IPPF_IFINDEX; if (!IN6_IS_ADDR_UNSPECIFIED( &ipp->ipp_addr)) ipp->ipp_fields |= IPPF_ADDR; else ipp->ipp_fields &= ~IPPF_ADDR; } if (sticky) { error = udp_build_hdrs(udp); if (error != 0) return (error); } break; case IPV6_HOPLIMIT: if (sticky) return (EINVAL); if (inlen != 0 && inlen != sizeof (int)) return (EINVAL); if (checkonly) break; if (inlen == 0) { ipp->ipp_fields &= ~IPPF_HOPLIMIT; ipp->ipp_sticky_ignored |= IPPF_HOPLIMIT; } else { if (*i1 > 255 || *i1 < -1) return (EINVAL); if (*i1 == -1) ipp->ipp_hoplimit = us->us_ipv6_hoplimit; else ipp->ipp_hoplimit = *i1; ipp->ipp_fields |= IPPF_HOPLIMIT; } break; case IPV6_TCLASS: if (inlen != 0 && inlen != sizeof (int)) return (EINVAL); if (checkonly) break; if (inlen == 0) { ipp->ipp_fields &= ~IPPF_TCLASS; ipp->ipp_sticky_ignored |= IPPF_TCLASS; } else { if (*i1 > 255 || *i1 < -1) return (EINVAL); if (*i1 == -1) ipp->ipp_tclass = 0; else ipp->ipp_tclass = *i1; ipp->ipp_fields |= IPPF_TCLASS; } if (sticky) { error = udp_build_hdrs(udp); if (error != 0) return (error); } break; case IPV6_NEXTHOP: /* * IP will verify that the nexthop is reachable * and fail for sticky options. */ if (inlen != 0 && inlen != sizeof (sin6_t)) return (EINVAL); if (checkonly) break; if (inlen == 0) { ipp->ipp_fields &= ~IPPF_NEXTHOP; ipp->ipp_sticky_ignored |= IPPF_NEXTHOP; } else { sin6_t *sin6 = (sin6_t *)invalp; if (sin6->sin6_family != AF_INET6) return (EAFNOSUPPORT); if (IN6_IS_ADDR_V4MAPPED( &sin6->sin6_addr)) return (EADDRNOTAVAIL); ipp->ipp_nexthop = sin6->sin6_addr; if (!IN6_IS_ADDR_UNSPECIFIED( &ipp->ipp_nexthop)) ipp->ipp_fields |= IPPF_NEXTHOP; else ipp->ipp_fields &= ~IPPF_NEXTHOP; } if (sticky) { error = udp_build_hdrs(udp); if (error != 0) return (error); } break; case IPV6_HOPOPTS: { ip6_hbh_t *hopts = (ip6_hbh_t *)invalp; /* * Sanity checks - minimum size, size a multiple of * eight bytes, and matching size passed in. */ if (inlen != 0 && inlen != (8 * (hopts->ip6h_len + 1))) return (EINVAL); if (checkonly) break; error = optcom_pkt_set(invalp, inlen, sticky, (uchar_t **)&ipp->ipp_hopopts, &ipp->ipp_hopoptslen, sticky ? udp->udp_label_len_v6 : 0); if (error != 0) return (error); if (ipp->ipp_hopoptslen == 0) { ipp->ipp_fields &= ~IPPF_HOPOPTS; ipp->ipp_sticky_ignored |= IPPF_HOPOPTS; } else { ipp->ipp_fields |= IPPF_HOPOPTS; } if (sticky) { error = udp_build_hdrs(udp); if (error != 0) return (error); } break; } case IPV6_RTHDRDSTOPTS: { ip6_dest_t *dopts = (ip6_dest_t *)invalp; /* * Sanity checks - minimum size, size a multiple of * eight bytes, and matching size passed in. */ if (inlen != 0 && inlen != (8 * (dopts->ip6d_len + 1))) return (EINVAL); if (checkonly) break; if (inlen == 0) { if (sticky && (ipp->ipp_fields & IPPF_RTDSTOPTS) != 0) { kmem_free(ipp->ipp_rtdstopts, ipp->ipp_rtdstoptslen); ipp->ipp_rtdstopts = NULL; ipp->ipp_rtdstoptslen = 0; } ipp->ipp_fields &= ~IPPF_RTDSTOPTS; ipp->ipp_sticky_ignored |= IPPF_RTDSTOPTS; } else { error = optcom_pkt_set(invalp, inlen, sticky, (uchar_t **)&ipp->ipp_rtdstopts, &ipp->ipp_rtdstoptslen, 0); if (error != 0) return (error); ipp->ipp_fields |= IPPF_RTDSTOPTS; } if (sticky) { error = udp_build_hdrs(udp); if (error != 0) return (error); } break; } case IPV6_DSTOPTS: { ip6_dest_t *dopts = (ip6_dest_t *)invalp; /* * Sanity checks - minimum size, size a multiple of * eight bytes, and matching size passed in. */ if (inlen != 0 && inlen != (8 * (dopts->ip6d_len + 1))) return (EINVAL); if (checkonly) break; if (inlen == 0) { if (sticky && (ipp->ipp_fields & IPPF_DSTOPTS) != 0) { kmem_free(ipp->ipp_dstopts, ipp->ipp_dstoptslen); ipp->ipp_dstopts = NULL; ipp->ipp_dstoptslen = 0; } ipp->ipp_fields &= ~IPPF_DSTOPTS; ipp->ipp_sticky_ignored |= IPPF_DSTOPTS; } else { error = optcom_pkt_set(invalp, inlen, sticky, (uchar_t **)&ipp->ipp_dstopts, &ipp->ipp_dstoptslen, 0); if (error != 0) return (error); ipp->ipp_fields |= IPPF_DSTOPTS; } if (sticky) { error = udp_build_hdrs(udp); if (error != 0) return (error); } break; } case IPV6_RTHDR: { ip6_rthdr_t *rt = (ip6_rthdr_t *)invalp; /* * Sanity checks - minimum size, size a multiple of * eight bytes, and matching size passed in. */ if (inlen != 0 && inlen != (8 * (rt->ip6r_len + 1))) return (EINVAL); if (checkonly) break; if (inlen == 0) { if (sticky && (ipp->ipp_fields & IPPF_RTHDR) != 0) { kmem_free(ipp->ipp_rthdr, ipp->ipp_rthdrlen); ipp->ipp_rthdr = NULL; ipp->ipp_rthdrlen = 0; } ipp->ipp_fields &= ~IPPF_RTHDR; ipp->ipp_sticky_ignored |= IPPF_RTHDR; } else { error = optcom_pkt_set(invalp, inlen, sticky, (uchar_t **)&ipp->ipp_rthdr, &ipp->ipp_rthdrlen, 0); if (error != 0) return (error); ipp->ipp_fields |= IPPF_RTHDR; } if (sticky) { error = udp_build_hdrs(udp); if (error != 0) return (error); } break; } case IPV6_DONTFRAG: if (checkonly) break; if (onoff) { ipp->ipp_fields |= IPPF_DONTFRAG; } else { ipp->ipp_fields &= ~IPPF_DONTFRAG; } break; case IPV6_USE_MIN_MTU: if (inlen != sizeof (int)) return (EINVAL); if (*i1 < -1 || *i1 > 1) return (EINVAL); if (checkonly) break; ipp->ipp_fields |= IPPF_USE_MIN_MTU; ipp->ipp_use_min_mtu = *i1; break; case IPV6_BOUND_PIF: case IPV6_SEC_OPT: case IPV6_DONTFAILOVER_IF: case IPV6_SRC_PREFERENCES: case IPV6_V6ONLY: /* Handled at the IP level */ return (-EINVAL); default: *outlenp = 0; return (EINVAL); } break; } /* end IPPROTO_IPV6 */ case IPPROTO_UDP: switch (name) { case UDP_ANONPRIVBIND: if ((error = secpolicy_net_privaddr(cr, 0, IPPROTO_UDP)) != 0) { *outlenp = 0; return (error); } if (!checkonly) { udp->udp_anon_priv_bind = onoff; } break; case UDP_EXCLBIND: if (!checkonly) udp->udp_exclbind = onoff; break; case UDP_RCVHDR: if (!checkonly) udp->udp_rcvhdr = onoff; break; case UDP_NAT_T_ENDPOINT: if ((error = secpolicy_ip_config(cr, B_FALSE)) != 0) { *outlenp = 0; return (error); } /* * Use udp_family instead so we can avoid ambiguitites * with AF_INET6 sockets that may switch from IPv4 * to IPv6. */ if (udp->udp_family != AF_INET) { *outlenp = 0; return (EAFNOSUPPORT); } if (!checkonly) { udp->udp_nat_t_endpoint = onoff; udp->udp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + UDPH_SIZE + udp->udp_ip_snd_options_len; /* Also, adjust wroff */ if (onoff) { udp->udp_max_hdr_len += sizeof (uint32_t); } (void) mi_set_sth_wroff(RD(q), udp->udp_max_hdr_len + us->us_wroff_extra); } break; default: *outlenp = 0; return (EINVAL); } break; default: *outlenp = 0; return (EINVAL); } /* * Common case of OK return with outval same as inval. */ if (invalp != outvalp) { /* don't trust bcopy for identical src/dst */ (void) bcopy(invalp, outvalp, inlen); } *outlenp = inlen; return (0); } int udp_opt_set(queue_t *q, uint_t optset_context, int level, int name, uint_t inlen, uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp, void *thisdg_attrs, cred_t *cr, mblk_t *mblk) { udp_t *udp; int err; udp = Q_TO_UDP(q); rw_enter(&udp->udp_rwlock, RW_WRITER); err = udp_opt_set_locked(q, optset_context, level, name, inlen, invalp, outlenp, outvalp, thisdg_attrs, cr, mblk); rw_exit(&udp->udp_rwlock); return (err); } /* * Update udp_sticky_hdrs based on udp_sticky_ipp, udp_v6src, and udp_ttl. * The headers include ip6i_t (if needed), ip6_t, any sticky extension * headers, and the udp header. * Returns failure if can't allocate memory. */ static int udp_build_hdrs(udp_t *udp) { udp_stack_t *us = udp->udp_us; uchar_t *hdrs; uint_t hdrs_len; ip6_t *ip6h; ip6i_t *ip6i; udpha_t *udpha; ip6_pkt_t *ipp = &udp->udp_sticky_ipp; size_t sth_wroff; ASSERT(RW_WRITE_HELD(&udp->udp_rwlock)); hdrs_len = ip_total_hdrs_len_v6(ipp) + UDPH_SIZE; ASSERT(hdrs_len != 0); if (hdrs_len != udp->udp_sticky_hdrs_len) { /* Need to reallocate */ hdrs = kmem_alloc(hdrs_len, KM_NOSLEEP); if (hdrs == NULL) return (ENOMEM); if (udp->udp_sticky_hdrs_len != 0) { kmem_free(udp->udp_sticky_hdrs, udp->udp_sticky_hdrs_len); } udp->udp_sticky_hdrs = hdrs; udp->udp_sticky_hdrs_len = hdrs_len; } ip_build_hdrs_v6(udp->udp_sticky_hdrs, udp->udp_sticky_hdrs_len - UDPH_SIZE, ipp, IPPROTO_UDP); /* Set header fields not in ipp */ if (ipp->ipp_fields & IPPF_HAS_IP6I) { ip6i = (ip6i_t *)udp->udp_sticky_hdrs; ip6h = (ip6_t *)&ip6i[1]; } else { ip6h = (ip6_t *)udp->udp_sticky_hdrs; } if (!(ipp->ipp_fields & IPPF_ADDR)) ip6h->ip6_src = udp->udp_v6src; udpha = (udpha_t *)(udp->udp_sticky_hdrs + hdrs_len - UDPH_SIZE); udpha->uha_src_port = udp->udp_port; /* Try to get everything in a single mblk */ if (hdrs_len > udp->udp_max_hdr_len) { udp->udp_max_hdr_len = hdrs_len; sth_wroff = udp->udp_max_hdr_len + us->us_wroff_extra; rw_exit(&udp->udp_rwlock); (void) mi_set_sth_wroff(udp->udp_connp->conn_rq, sth_wroff); rw_enter(&udp->udp_rwlock, RW_WRITER); } return (0); } /* * This routine retrieves the value of an ND variable in a udpparam_t * structure. It is called through nd_getset when a user reads the * variable. */ /* ARGSUSED */ static int udp_param_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr) { udpparam_t *udppa = (udpparam_t *)cp; (void) mi_mpprintf(mp, "%d", udppa->udp_param_value); return (0); } /* * Walk through the param array specified registering each element with the * named dispatch (ND) handler. */ static boolean_t udp_param_register(IDP *ndp, udpparam_t *udppa, int cnt) { for (; cnt-- > 0; udppa++) { if (udppa->udp_param_name && udppa->udp_param_name[0]) { if (!nd_load(ndp, udppa->udp_param_name, udp_param_get, udp_param_set, (caddr_t)udppa)) { nd_free(ndp); return (B_FALSE); } } } if (!nd_load(ndp, "udp_extra_priv_ports", udp_extra_priv_ports_get, NULL, NULL)) { nd_free(ndp); return (B_FALSE); } if (!nd_load(ndp, "udp_extra_priv_ports_add", NULL, udp_extra_priv_ports_add, NULL)) { nd_free(ndp); return (B_FALSE); } if (!nd_load(ndp, "udp_extra_priv_ports_del", NULL, udp_extra_priv_ports_del, NULL)) { nd_free(ndp); return (B_FALSE); } if (!nd_load(ndp, "udp_status", udp_status_report, NULL, NULL)) { nd_free(ndp); return (B_FALSE); } if (!nd_load(ndp, "udp_bind_hash", udp_bind_hash_report, NULL, NULL)) { nd_free(ndp); return (B_FALSE); } return (B_TRUE); } /* This routine sets an ND variable in a udpparam_t structure. */ /* ARGSUSED */ static int udp_param_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr) { long new_value; udpparam_t *udppa = (udpparam_t *)cp; /* * Fail the request if the new value does not lie within the * required bounds. */ if (ddi_strtol(value, NULL, 10, &new_value) != 0 || new_value < udppa->udp_param_min || new_value > udppa->udp_param_max) { return (EINVAL); } /* Set the new value */ udppa->udp_param_value = new_value; return (0); } /* * Copy hop-by-hop option from ipp->ipp_hopopts to the buffer provided (with * T_opthdr) and return the number of bytes copied. 'dbuf' may be NULL to * just count the length needed for allocation. If 'dbuf' is non-NULL, * then it's assumed to be allocated to be large enough. * * Returns zero if trimming of the security option causes all options to go * away. */ static size_t copy_hop_opts(const ip6_pkt_t *ipp, uchar_t *dbuf) { struct T_opthdr *toh; size_t hol = ipp->ipp_hopoptslen; ip6_hbh_t *dstopt = NULL; const ip6_hbh_t *srcopt = ipp->ipp_hopopts; size_t tlen, olen, plen; boolean_t deleting; const struct ip6_opt *sopt, *lastpad; struct ip6_opt *dopt; if ((toh = (struct T_opthdr *)dbuf) != NULL) { toh->level = IPPROTO_IPV6; toh->name = IPV6_HOPOPTS; toh->status = 0; dstopt = (ip6_hbh_t *)(toh + 1); } /* * If labeling is enabled, then skip the label option * but get other options if there are any. */ if (is_system_labeled()) { dopt = NULL; if (dstopt != NULL) { /* will fill in ip6h_len later */ dstopt->ip6h_nxt = srcopt->ip6h_nxt; dopt = (struct ip6_opt *)(dstopt + 1); } sopt = (const struct ip6_opt *)(srcopt + 1); hol -= sizeof (*srcopt); tlen = sizeof (*dstopt); lastpad = NULL; deleting = B_FALSE; /* * This loop finds the first (lastpad pointer) of any number of * pads that preceeds the security option, then treats the * security option as though it were a pad, and then finds the * next non-pad option (or end of list). * * It then treats the entire block as one big pad. To preserve * alignment of any options that follow, or just the end of the * list, it computes a minimal new padding size that keeps the * same alignment for the next option. * * If it encounters just a sequence of pads with no security * option, those are copied as-is rather than collapsed. * * Note that to handle the end of list case, the code makes one * loop with 'hol' set to zero. */ for (;;) { if (hol > 0) { if (sopt->ip6o_type == IP6OPT_PAD1) { if (lastpad == NULL) lastpad = sopt; sopt = (const struct ip6_opt *) &sopt->ip6o_len; hol--; continue; } olen = sopt->ip6o_len + sizeof (*sopt); if (olen > hol) olen = hol; if (sopt->ip6o_type == IP6OPT_PADN || sopt->ip6o_type == ip6opt_ls) { if (sopt->ip6o_type == ip6opt_ls) deleting = B_TRUE; if (lastpad == NULL) lastpad = sopt; sopt = (const struct ip6_opt *) ((const char *)sopt + olen); hol -= olen; continue; } } else { /* if nothing was copied at all, then delete */ if (tlen == sizeof (*dstopt)) return (0); /* last pass; pick up any trailing padding */ olen = 0; } if (deleting) { /* * compute aligning effect of deleted material * to reproduce with pad. */ plen = ((const char *)sopt - (const char *)lastpad) & 7; tlen += plen; if (dopt != NULL) { if (plen == 1) { dopt->ip6o_type = IP6OPT_PAD1; } else if (plen > 1) { plen -= sizeof (*dopt); dopt->ip6o_type = IP6OPT_PADN; dopt->ip6o_len = plen; if (plen > 0) bzero(dopt + 1, plen); } dopt = (struct ip6_opt *) ((char *)dopt + plen); } deleting = B_FALSE; lastpad = NULL; } /* if there's uncopied padding, then copy that now */ if (lastpad != NULL) { olen += (const char *)sopt - (const char *)lastpad; sopt = lastpad; lastpad = NULL; } if (dopt != NULL && olen > 0) { bcopy(sopt, dopt, olen); dopt = (struct ip6_opt *)((char *)dopt + olen); } if (hol == 0) break; tlen += olen; sopt = (const struct ip6_opt *) ((const char *)sopt + olen); hol -= olen; } /* go back and patch up the length value, rounded upward */ if (dstopt != NULL) dstopt->ip6h_len = (tlen - 1) >> 3; } else { tlen = hol; if (dstopt != NULL) bcopy(srcopt, dstopt, hol); } tlen += sizeof (*toh); if (toh != NULL) toh->len = tlen; return (tlen); } /* * Update udp_rcv_opt_len from the packet. * Called when options received, and when no options received but * udp_ip_recv_opt_len has previously recorded options. */ static void udp_save_ip_rcv_opt(udp_t *udp, void *opt, int opt_len) { /* Save the options if any */ if (opt_len > 0) { if (opt_len > udp->udp_ip_rcv_options_len) { /* Need to allocate larger buffer */ if (udp->udp_ip_rcv_options_len != 0) mi_free((char *)udp->udp_ip_rcv_options); udp->udp_ip_rcv_options_len = 0; udp->udp_ip_rcv_options = (uchar_t *)mi_alloc(opt_len, BPRI_HI); if (udp->udp_ip_rcv_options != NULL) udp->udp_ip_rcv_options_len = opt_len; } if (udp->udp_ip_rcv_options_len != 0) { bcopy(opt, udp->udp_ip_rcv_options, opt_len); /* Adjust length if we are resusing the space */ udp->udp_ip_rcv_options_len = opt_len; } } else if (udp->udp_ip_rcv_options_len != 0) { /* Clear out previously recorded options */ mi_free((char *)udp->udp_ip_rcv_options); udp->udp_ip_rcv_options = NULL; udp->udp_ip_rcv_options_len = 0; } } /* ARGSUSED2 */ static void udp_input(void *arg1, mblk_t *mp, void *arg2) { conn_t *connp = (conn_t *)arg1; struct T_unitdata_ind *tudi; uchar_t *rptr; /* Pointer to IP header */ int hdr_length; /* Length of IP+UDP headers */ int opt_len; int udi_size; /* Size of T_unitdata_ind */ int mp_len; udp_t *udp; udpha_t *udpha; int ipversion; ip6_pkt_t ipp; ip6_t *ip6h; ip6i_t *ip6i; mblk_t *mp1; mblk_t *options_mp = NULL; ip_pktinfo_t *pinfo = NULL; cred_t *cr = NULL; pid_t cpid; uint32_t udp_ip_rcv_options_len; udp_bits_t udp_bits; cred_t *rcr = connp->conn_cred; udp_stack_t *us; ASSERT(connp->conn_flags & IPCL_UDPCONN); udp = connp->conn_udp; us = udp->udp_us; rptr = mp->b_rptr; ASSERT(DB_TYPE(mp) == M_DATA || DB_TYPE(mp) == M_CTL); ASSERT(OK_32PTR(rptr)); /* * IP should have prepended the options data in an M_CTL * Check M_CTL "type" to make sure are not here bcos of * a valid ICMP message */ if (DB_TYPE(mp) == M_CTL) { if (MBLKL(mp) == sizeof (ip_pktinfo_t) && ((ip_pktinfo_t *)mp->b_rptr)->ip_pkt_ulp_type == IN_PKTINFO) { /* * IP_RECVIF or IP_RECVSLLA or IPF_RECVADDR information * has been prepended to the packet by IP. We need to * extract the mblk and adjust the rptr */ pinfo = (ip_pktinfo_t *)mp->b_rptr; options_mp = mp; mp = mp->b_cont; rptr = mp->b_rptr; UDP_STAT(us, udp_in_pktinfo); } else { /* * ICMP messages. */ udp_icmp_error(connp->conn_rq, mp); return; } } mp_len = msgdsize(mp); /* * This is the inbound data path. * First, we check to make sure the IP version number is correct, * and then pull the IP and UDP headers into the first mblk. */ /* Initialize regardless if ipversion is IPv4 or IPv6 */ ipp.ipp_fields = 0; ipversion = IPH_HDR_VERSION(rptr); rw_enter(&udp->udp_rwlock, RW_READER); udp_ip_rcv_options_len = udp->udp_ip_rcv_options_len; udp_bits = udp->udp_bits; rw_exit(&udp->udp_rwlock); switch (ipversion) { case IPV4_VERSION: ASSERT(MBLKL(mp) >= sizeof (ipha_t)); ASSERT(((ipha_t *)rptr)->ipha_protocol == IPPROTO_UDP); hdr_length = IPH_HDR_LENGTH(rptr) + UDPH_SIZE; opt_len = hdr_length - (IP_SIMPLE_HDR_LENGTH + UDPH_SIZE); if ((opt_len > 0 || udp_ip_rcv_options_len > 0) && udp->udp_family == AF_INET) { /* * Record/update udp_ip_rcv_options with the lock * held. Not needed for AF_INET6 sockets * since they don't support a getsockopt of IP_OPTIONS. */ rw_enter(&udp->udp_rwlock, RW_WRITER); udp_save_ip_rcv_opt(udp, rptr + IP_SIMPLE_HDR_LENGTH, opt_len); rw_exit(&udp->udp_rwlock); } /* Handle IPV6_RECVPKTINFO even for IPv4 packet. */ if ((udp->udp_family == AF_INET6) && (pinfo != NULL) && udp->udp_ip_recvpktinfo) { if (pinfo->ip_pkt_flags & IPF_RECVIF) { ipp.ipp_fields |= IPPF_IFINDEX; ipp.ipp_ifindex = pinfo->ip_pkt_ifindex; } } break; case IPV6_VERSION: /* * IPv6 packets can only be received by applications * that are prepared to receive IPv6 addresses. * The IP fanout must ensure this. */ ASSERT(udp->udp_family == AF_INET6); ip6h = (ip6_t *)rptr; ASSERT((uchar_t *)&ip6h[1] <= mp->b_wptr); if (ip6h->ip6_nxt != IPPROTO_UDP) { uint8_t nexthdrp; /* Look for ifindex information */ if (ip6h->ip6_nxt == IPPROTO_RAW) { ip6i = (ip6i_t *)ip6h; if ((uchar_t *)&ip6i[1] > mp->b_wptr) goto tossit; if (ip6i->ip6i_flags & IP6I_IFINDEX) { ASSERT(ip6i->ip6i_ifindex != 0); ipp.ipp_fields |= IPPF_IFINDEX; ipp.ipp_ifindex = ip6i->ip6i_ifindex; } rptr = (uchar_t *)&ip6i[1]; mp->b_rptr = rptr; if (rptr == mp->b_wptr) { mp1 = mp->b_cont; freeb(mp); mp = mp1; rptr = mp->b_rptr; } if (MBLKL(mp) < (IPV6_HDR_LEN + UDPH_SIZE)) goto tossit; ip6h = (ip6_t *)rptr; mp_len = msgdsize(mp); } /* * Find any potentially interesting extension headers * as well as the length of the IPv6 + extension * headers. */ hdr_length = ip_find_hdr_v6(mp, ip6h, &ipp, &nexthdrp) + UDPH_SIZE; ASSERT(nexthdrp == IPPROTO_UDP); } else { hdr_length = IPV6_HDR_LEN + UDPH_SIZE; ip6i = NULL; } break; default: ASSERT(0); } /* * IP inspected the UDP header thus all of it must be in the mblk. * UDP length check is performed for IPv6 packets and IPv4 packets * to check if the size of the packet as specified * by the header is the same as the physical size of the packet. * FIXME? Didn't IP already check this? */ udpha = (udpha_t *)(rptr + (hdr_length - UDPH_SIZE)); if ((MBLKL(mp) < hdr_length) || (mp_len != (ntohs(udpha->uha_length) + hdr_length - UDPH_SIZE))) { goto tossit; } /* Walk past the headers unless IP_RECVHDR was set. */ if (!udp_bits.udpb_rcvhdr) { mp->b_rptr = rptr + hdr_length; mp_len -= hdr_length; } /* * This is the inbound data path. Packets are passed upstream as * T_UNITDATA_IND messages with full IP headers still attached. */ if (udp->udp_family == AF_INET) { sin_t *sin; ASSERT(IPH_HDR_VERSION((ipha_t *)rptr) == IPV4_VERSION); /* * Normally only send up the source address. * If IP_RECVDSTADDR is set we include the destination IP * address as an option. With IP_RECVOPTS we include all * the IP options. */ udi_size = sizeof (struct T_unitdata_ind) + sizeof (sin_t); if (udp_bits.udpb_recvdstaddr) { udi_size += sizeof (struct T_opthdr) + sizeof (struct in_addr); UDP_STAT(us, udp_in_recvdstaddr); } if (udp_bits.udpb_ip_recvpktinfo && (pinfo != NULL) && (pinfo->ip_pkt_flags & IPF_RECVADDR)) { udi_size += sizeof (struct T_opthdr) + sizeof (struct in_pktinfo); UDP_STAT(us, udp_ip_rcvpktinfo); } if ((udp_bits.udpb_recvopts) && opt_len > 0) { udi_size += sizeof (struct T_opthdr) + opt_len; UDP_STAT(us, udp_in_recvopts); } /* * If the IP_RECVSLLA or the IP_RECVIF is set then allocate * space accordingly */ if ((udp_bits.udpb_recvif) && (pinfo != NULL) && (pinfo->ip_pkt_flags & IPF_RECVIF)) { udi_size += sizeof (struct T_opthdr) + sizeof (uint_t); UDP_STAT(us, udp_in_recvif); } if ((udp_bits.udpb_recvslla) && (pinfo != NULL) && (pinfo->ip_pkt_flags & IPF_RECVSLLA)) { udi_size += sizeof (struct T_opthdr) + sizeof (struct sockaddr_dl); UDP_STAT(us, udp_in_recvslla); } if ((udp_bits.udpb_recvucred) && (cr = DB_CRED(mp)) != NULL) { udi_size += sizeof (struct T_opthdr) + ucredsize; cpid = DB_CPID(mp); UDP_STAT(us, udp_in_recvucred); } /* * If SO_TIMESTAMP is set allocate the appropriate sized * buffer. Since gethrestime() expects a pointer aligned * argument, we allocate space necessary for extra * alignment (even though it might not be used). */ if (udp_bits.udpb_timestamp) { udi_size += sizeof (struct T_opthdr) + sizeof (timestruc_t) + _POINTER_ALIGNMENT; UDP_STAT(us, udp_in_timestamp); } /* * If IP_RECVTTL is set allocate the appropriate sized buffer */ if (udp_bits.udpb_recvttl) { udi_size += sizeof (struct T_opthdr) + sizeof (uint8_t); UDP_STAT(us, udp_in_recvttl); } /* Allocate a message block for the T_UNITDATA_IND structure. */ mp1 = allocb(udi_size, BPRI_MED); if (mp1 == NULL) { freemsg(mp); if (options_mp != NULL) freeb(options_mp); BUMP_MIB(&us->us_udp_mib, udpInErrors); return; } mp1->b_cont = mp; mp = mp1; mp->b_datap->db_type = M_PROTO; tudi = (struct T_unitdata_ind *)mp->b_rptr; mp->b_wptr = (uchar_t *)tudi + udi_size; tudi->PRIM_type = T_UNITDATA_IND; tudi->SRC_length = sizeof (sin_t); tudi->SRC_offset = sizeof (struct T_unitdata_ind); tudi->OPT_offset = sizeof (struct T_unitdata_ind) + sizeof (sin_t); udi_size -= (sizeof (struct T_unitdata_ind) + sizeof (sin_t)); tudi->OPT_length = udi_size; sin = (sin_t *)&tudi[1]; sin->sin_addr.s_addr = ((ipha_t *)rptr)->ipha_src; sin->sin_port = udpha->uha_src_port; sin->sin_family = udp->udp_family; *(uint32_t *)&sin->sin_zero[0] = 0; *(uint32_t *)&sin->sin_zero[4] = 0; /* * Add options if IP_RECVDSTADDR, IP_RECVIF, IP_RECVSLLA or * IP_RECVTTL has been set. */ if (udi_size != 0) { /* * Copy in destination address before options to avoid * any padding issues. */ char *dstopt; dstopt = (char *)&sin[1]; if (udp_bits.udpb_recvdstaddr) { struct T_opthdr *toh; ipaddr_t *dstptr; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IP; toh->name = IP_RECVDSTADDR; toh->len = sizeof (struct T_opthdr) + sizeof (ipaddr_t); toh->status = 0; dstopt += sizeof (struct T_opthdr); dstptr = (ipaddr_t *)dstopt; *dstptr = ((ipha_t *)rptr)->ipha_dst; dstopt += sizeof (ipaddr_t); udi_size -= toh->len; } if (udp_bits.udpb_recvopts && opt_len > 0) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IP; toh->name = IP_RECVOPTS; toh->len = sizeof (struct T_opthdr) + opt_len; toh->status = 0; dstopt += sizeof (struct T_opthdr); bcopy(rptr + IP_SIMPLE_HDR_LENGTH, dstopt, opt_len); dstopt += opt_len; udi_size -= toh->len; } if ((udp_bits.udpb_ip_recvpktinfo) && (pinfo != NULL) && (pinfo->ip_pkt_flags & IPF_RECVADDR)) { struct T_opthdr *toh; struct in_pktinfo *pktinfop; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IP; toh->name = IP_PKTINFO; toh->len = sizeof (struct T_opthdr) + sizeof (*pktinfop); toh->status = 0; dstopt += sizeof (struct T_opthdr); pktinfop = (struct in_pktinfo *)dstopt; pktinfop->ipi_ifindex = pinfo->ip_pkt_ifindex; pktinfop->ipi_spec_dst = pinfo->ip_pkt_match_addr; pktinfop->ipi_addr.s_addr = ((ipha_t *)rptr)->ipha_dst; dstopt += sizeof (struct in_pktinfo); udi_size -= toh->len; } if ((udp_bits.udpb_recvslla) && (pinfo != NULL) && (pinfo->ip_pkt_flags & IPF_RECVSLLA)) { struct T_opthdr *toh; struct sockaddr_dl *dstptr; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IP; toh->name = IP_RECVSLLA; toh->len = sizeof (struct T_opthdr) + sizeof (struct sockaddr_dl); toh->status = 0; dstopt += sizeof (struct T_opthdr); dstptr = (struct sockaddr_dl *)dstopt; bcopy(&pinfo->ip_pkt_slla, dstptr, sizeof (struct sockaddr_dl)); dstopt += sizeof (struct sockaddr_dl); udi_size -= toh->len; } if ((udp_bits.udpb_recvif) && (pinfo != NULL) && (pinfo->ip_pkt_flags & IPF_RECVIF)) { struct T_opthdr *toh; uint_t *dstptr; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IP; toh->name = IP_RECVIF; toh->len = sizeof (struct T_opthdr) + sizeof (uint_t); toh->status = 0; dstopt += sizeof (struct T_opthdr); dstptr = (uint_t *)dstopt; *dstptr = pinfo->ip_pkt_ifindex; dstopt += sizeof (uint_t); udi_size -= toh->len; } if (cr != NULL) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = SOL_SOCKET; toh->name = SCM_UCRED; toh->len = sizeof (struct T_opthdr) + ucredsize; toh->status = 0; dstopt += sizeof (struct T_opthdr); (void) cred2ucred(cr, cpid, dstopt, rcr); dstopt += ucredsize; udi_size -= toh->len; } if (udp_bits.udpb_timestamp) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = SOL_SOCKET; toh->name = SCM_TIMESTAMP; toh->len = sizeof (struct T_opthdr) + sizeof (timestruc_t) + _POINTER_ALIGNMENT; toh->status = 0; dstopt += sizeof (struct T_opthdr); /* Align for gethrestime() */ dstopt = (char *)P2ROUNDUP((intptr_t)dstopt, sizeof (intptr_t)); gethrestime((timestruc_t *)dstopt); dstopt = (char *)toh + toh->len; udi_size -= toh->len; } /* * CAUTION: * Due to aligment issues * Processing of IP_RECVTTL option * should always be the last. Adding * any option processing after this will * cause alignment panic. */ if (udp_bits.udpb_recvttl) { struct T_opthdr *toh; uint8_t *dstptr; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IP; toh->name = IP_RECVTTL; toh->len = sizeof (struct T_opthdr) + sizeof (uint8_t); toh->status = 0; dstopt += sizeof (struct T_opthdr); dstptr = (uint8_t *)dstopt; *dstptr = ((ipha_t *)rptr)->ipha_ttl; dstopt += sizeof (uint8_t); udi_size -= toh->len; } /* Consumed all of allocated space */ ASSERT(udi_size == 0); } } else { sin6_t *sin6; /* * Handle both IPv4 and IPv6 packets for IPv6 sockets. * * Normally we only send up the address. If receiving of any * optional receive side information is enabled, we also send * that up as options. */ udi_size = sizeof (struct T_unitdata_ind) + sizeof (sin6_t); if (ipp.ipp_fields & (IPPF_HOPOPTS|IPPF_DSTOPTS|IPPF_RTDSTOPTS| IPPF_RTHDR|IPPF_IFINDEX)) { if ((udp_bits.udpb_ipv6_recvhopopts) && (ipp.ipp_fields & IPPF_HOPOPTS)) { size_t hlen; UDP_STAT(us, udp_in_recvhopopts); hlen = copy_hop_opts(&ipp, NULL); if (hlen == 0) ipp.ipp_fields &= ~IPPF_HOPOPTS; udi_size += hlen; } if (((udp_bits.udpb_ipv6_recvdstopts) || udp_bits.udpb_old_ipv6_recvdstopts) && (ipp.ipp_fields & IPPF_DSTOPTS)) { udi_size += sizeof (struct T_opthdr) + ipp.ipp_dstoptslen; UDP_STAT(us, udp_in_recvdstopts); } if ((((udp_bits.udpb_ipv6_recvdstopts) && udp_bits.udpb_ipv6_recvrthdr && (ipp.ipp_fields & IPPF_RTHDR)) || (udp_bits.udpb_ipv6_recvrthdrdstopts)) && (ipp.ipp_fields & IPPF_RTDSTOPTS)) { udi_size += sizeof (struct T_opthdr) + ipp.ipp_rtdstoptslen; UDP_STAT(us, udp_in_recvrtdstopts); } if ((udp_bits.udpb_ipv6_recvrthdr) && (ipp.ipp_fields & IPPF_RTHDR)) { udi_size += sizeof (struct T_opthdr) + ipp.ipp_rthdrlen; UDP_STAT(us, udp_in_recvrthdr); } if ((udp_bits.udpb_ip_recvpktinfo) && (ipp.ipp_fields & IPPF_IFINDEX)) { udi_size += sizeof (struct T_opthdr) + sizeof (struct in6_pktinfo); UDP_STAT(us, udp_in_recvpktinfo); } } if ((udp_bits.udpb_recvucred) && (cr = DB_CRED(mp)) != NULL) { udi_size += sizeof (struct T_opthdr) + ucredsize; cpid = DB_CPID(mp); UDP_STAT(us, udp_in_recvucred); } /* * If SO_TIMESTAMP is set allocate the appropriate sized * buffer. Since gethrestime() expects a pointer aligned * argument, we allocate space necessary for extra * alignment (even though it might not be used). */ if (udp_bits.udpb_timestamp) { udi_size += sizeof (struct T_opthdr) + sizeof (timestruc_t) + _POINTER_ALIGNMENT; UDP_STAT(us, udp_in_timestamp); } if (udp_bits.udpb_ipv6_recvhoplimit) { udi_size += sizeof (struct T_opthdr) + sizeof (int); UDP_STAT(us, udp_in_recvhoplimit); } if (udp_bits.udpb_ipv6_recvtclass) { udi_size += sizeof (struct T_opthdr) + sizeof (int); UDP_STAT(us, udp_in_recvtclass); } mp1 = allocb(udi_size, BPRI_MED); if (mp1 == NULL) { freemsg(mp); if (options_mp != NULL) freeb(options_mp); BUMP_MIB(&us->us_udp_mib, udpInErrors); return; } mp1->b_cont = mp; mp = mp1; mp->b_datap->db_type = M_PROTO; tudi = (struct T_unitdata_ind *)mp->b_rptr; mp->b_wptr = (uchar_t *)tudi + udi_size; tudi->PRIM_type = T_UNITDATA_IND; tudi->SRC_length = sizeof (sin6_t); tudi->SRC_offset = sizeof (struct T_unitdata_ind); tudi->OPT_offset = sizeof (struct T_unitdata_ind) + sizeof (sin6_t); udi_size -= (sizeof (struct T_unitdata_ind) + sizeof (sin6_t)); tudi->OPT_length = udi_size; sin6 = (sin6_t *)&tudi[1]; if (ipversion == IPV4_VERSION) { in6_addr_t v6dst; IN6_IPADDR_TO_V4MAPPED(((ipha_t *)rptr)->ipha_src, &sin6->sin6_addr); IN6_IPADDR_TO_V4MAPPED(((ipha_t *)rptr)->ipha_dst, &v6dst); sin6->sin6_flowinfo = 0; sin6->sin6_scope_id = 0; sin6->__sin6_src_id = ip_srcid_find_addr(&v6dst, connp->conn_zoneid, us->us_netstack); } else { sin6->sin6_addr = ip6h->ip6_src; /* No sin6_flowinfo per API */ sin6->sin6_flowinfo = 0; /* For link-scope source pass up scope id */ if ((ipp.ipp_fields & IPPF_IFINDEX) && IN6_IS_ADDR_LINKSCOPE(&ip6h->ip6_src)) sin6->sin6_scope_id = ipp.ipp_ifindex; else sin6->sin6_scope_id = 0; sin6->__sin6_src_id = ip_srcid_find_addr( &ip6h->ip6_dst, connp->conn_zoneid, us->us_netstack); } sin6->sin6_port = udpha->uha_src_port; sin6->sin6_family = udp->udp_family; if (udi_size != 0) { uchar_t *dstopt; dstopt = (uchar_t *)&sin6[1]; if ((udp_bits.udpb_ip_recvpktinfo) && (ipp.ipp_fields & IPPF_IFINDEX)) { struct T_opthdr *toh; struct in6_pktinfo *pkti; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IPV6; toh->name = IPV6_PKTINFO; toh->len = sizeof (struct T_opthdr) + sizeof (*pkti); toh->status = 0; dstopt += sizeof (struct T_opthdr); pkti = (struct in6_pktinfo *)dstopt; if (ipversion == IPV6_VERSION) pkti->ipi6_addr = ip6h->ip6_dst; else IN6_IPADDR_TO_V4MAPPED( ((ipha_t *)rptr)->ipha_dst, &pkti->ipi6_addr); pkti->ipi6_ifindex = ipp.ipp_ifindex; dstopt += sizeof (*pkti); udi_size -= toh->len; } if (udp_bits.udpb_ipv6_recvhoplimit) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IPV6; toh->name = IPV6_HOPLIMIT; toh->len = sizeof (struct T_opthdr) + sizeof (uint_t); toh->status = 0; dstopt += sizeof (struct T_opthdr); if (ipversion == IPV6_VERSION) *(uint_t *)dstopt = ip6h->ip6_hops; else *(uint_t *)dstopt = ((ipha_t *)rptr)->ipha_ttl; dstopt += sizeof (uint_t); udi_size -= toh->len; } if (udp_bits.udpb_ipv6_recvtclass) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IPV6; toh->name = IPV6_TCLASS; toh->len = sizeof (struct T_opthdr) + sizeof (uint_t); toh->status = 0; dstopt += sizeof (struct T_opthdr); if (ipversion == IPV6_VERSION) { *(uint_t *)dstopt = IPV6_FLOW_TCLASS(ip6h->ip6_flow); } else { ipha_t *ipha = (ipha_t *)rptr; *(uint_t *)dstopt = ipha->ipha_type_of_service; } dstopt += sizeof (uint_t); udi_size -= toh->len; } if ((udp_bits.udpb_ipv6_recvhopopts) && (ipp.ipp_fields & IPPF_HOPOPTS)) { size_t hlen; hlen = copy_hop_opts(&ipp, dstopt); dstopt += hlen; udi_size -= hlen; } if ((udp_bits.udpb_ipv6_recvdstopts) && (udp_bits.udpb_ipv6_recvrthdr) && (ipp.ipp_fields & IPPF_RTHDR) && (ipp.ipp_fields & IPPF_RTDSTOPTS)) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IPV6; toh->name = IPV6_DSTOPTS; toh->len = sizeof (struct T_opthdr) + ipp.ipp_rtdstoptslen; toh->status = 0; dstopt += sizeof (struct T_opthdr); bcopy(ipp.ipp_rtdstopts, dstopt, ipp.ipp_rtdstoptslen); dstopt += ipp.ipp_rtdstoptslen; udi_size -= toh->len; } if ((udp_bits.udpb_ipv6_recvrthdr) && (ipp.ipp_fields & IPPF_RTHDR)) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IPV6; toh->name = IPV6_RTHDR; toh->len = sizeof (struct T_opthdr) + ipp.ipp_rthdrlen; toh->status = 0; dstopt += sizeof (struct T_opthdr); bcopy(ipp.ipp_rthdr, dstopt, ipp.ipp_rthdrlen); dstopt += ipp.ipp_rthdrlen; udi_size -= toh->len; } if ((udp_bits.udpb_ipv6_recvdstopts) && (ipp.ipp_fields & IPPF_DSTOPTS)) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = IPPROTO_IPV6; toh->name = IPV6_DSTOPTS; toh->len = sizeof (struct T_opthdr) + ipp.ipp_dstoptslen; toh->status = 0; dstopt += sizeof (struct T_opthdr); bcopy(ipp.ipp_dstopts, dstopt, ipp.ipp_dstoptslen); dstopt += ipp.ipp_dstoptslen; udi_size -= toh->len; } if (cr != NULL) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = SOL_SOCKET; toh->name = SCM_UCRED; toh->len = sizeof (struct T_opthdr) + ucredsize; toh->status = 0; (void) cred2ucred(cr, cpid, &toh[1], rcr); dstopt += toh->len; udi_size -= toh->len; } if (udp_bits.udpb_timestamp) { struct T_opthdr *toh; toh = (struct T_opthdr *)dstopt; toh->level = SOL_SOCKET; toh->name = SCM_TIMESTAMP; toh->len = sizeof (struct T_opthdr) + sizeof (timestruc_t) + _POINTER_ALIGNMENT; toh->status = 0; dstopt += sizeof (struct T_opthdr); /* Align for gethrestime() */ dstopt = (uchar_t *)P2ROUNDUP((intptr_t)dstopt, sizeof (intptr_t)); gethrestime((timestruc_t *)dstopt); dstopt = (uchar_t *)toh + toh->len; udi_size -= toh->len; } /* Consumed all of allocated space */ ASSERT(udi_size == 0); } #undef sin6 /* No IP_RECVDSTADDR for IPv6. */ } BUMP_MIB(&us->us_udp_mib, udpHCInDatagrams); if (options_mp != NULL) freeb(options_mp); if (udp_bits.udpb_direct_sockfs) { /* * There is nothing above us except for the stream head; * use the read-side synchronous stream interface in * order to reduce the time spent in interrupt thread. */ ASSERT(udp->udp_issocket); udp_rcv_enqueue(connp->conn_rq, udp, mp, mp_len); } else { /* * Use regular STREAMS interface to pass data upstream * if this is not a socket endpoint, or if we have * switched over to the slow mode due to sockmod being * popped or a module being pushed on top of us. */ putnext(connp->conn_rq, mp); } return; tossit: freemsg(mp); if (options_mp != NULL) freeb(options_mp); BUMP_MIB(&us->us_udp_mib, udpInErrors); } /* * Handle the results of a T_BIND_REQ whether deferred by IP or handled * immediately. */ static void udp_bind_result(conn_t *connp, mblk_t *mp) { struct T_error_ack *tea; switch (mp->b_datap->db_type) { case M_PROTO: case M_PCPROTO: /* M_PROTO messages contain some type of TPI message. */ ASSERT((uintptr_t)(mp->b_wptr - mp->b_rptr) <= (uintptr_t)INT_MAX); if (mp->b_wptr - mp->b_rptr < sizeof (t_scalar_t)) { freemsg(mp); return; } tea = (struct T_error_ack *)mp->b_rptr; switch (tea->PRIM_type) { case T_ERROR_ACK: switch (tea->ERROR_prim) { case O_T_BIND_REQ: case T_BIND_REQ: udp_bind_error(connp, mp); return; default: break; } ASSERT(0); freemsg(mp); return; case T_BIND_ACK: udp_bind_ack(connp, mp); return; default: break; } freemsg(mp); return; default: /* FIXME: other cases? */ ASSERT(0); freemsg(mp); return; } } /* * Process a T_BIND_ACK */ static void udp_bind_ack(conn_t *connp, mblk_t *mp) { udp_t *udp = connp->conn_udp; mblk_t *mp1; ire_t *ire; struct T_bind_ack *tba; uchar_t *addrp; ipa_conn_t *ac; ipa6_conn_t *ac6; udp_fanout_t *udpf; udp_stack_t *us = udp->udp_us; ASSERT(udp->udp_pending_op != -1); rw_enter(&udp->udp_rwlock, RW_WRITER); /* * If a broadcast/multicast address was bound set * the source address to 0. * This ensures no datagrams with broadcast address * as source address are emitted (which would violate * RFC1122 - Hosts requirements) * * Note that when connecting the returned IRE is * for the destination address and we only perform * the broadcast check for the source address (it * is OK to connect to a broadcast/multicast address.) */ mp1 = mp->b_cont; if (mp1 != NULL && mp1->b_datap->db_type == IRE_DB_TYPE) { ire = (ire_t *)mp1->b_rptr; /* * Note: we get IRE_BROADCAST for IPv6 to "mark" a multicast * local address. */ udpf = &us->us_bind_fanout[UDP_BIND_HASH(udp->udp_port, us->us_bind_fanout_size)]; if (ire->ire_type == IRE_BROADCAST && udp->udp_state != TS_DATA_XFER) { ASSERT(udp->udp_pending_op == T_BIND_REQ || udp->udp_pending_op == O_T_BIND_REQ); /* This was just a local bind to a broadcast addr */ mutex_enter(&udpf->uf_lock); V6_SET_ZERO(udp->udp_v6src); mutex_exit(&udpf->uf_lock); if (udp->udp_family == AF_INET6) (void) udp_build_hdrs(udp); } else if (V6_OR_V4_INADDR_ANY(udp->udp_v6src)) { /* * Local address not yet set - pick it from the * T_bind_ack */ tba = (struct T_bind_ack *)mp->b_rptr; addrp = &mp->b_rptr[tba->ADDR_offset]; switch (udp->udp_family) { case AF_INET: if (tba->ADDR_length == sizeof (ipa_conn_t)) { ac = (ipa_conn_t *)addrp; } else { ASSERT(tba->ADDR_length == sizeof (ipa_conn_x_t)); ac = &((ipa_conn_x_t *)addrp)->acx_conn; } mutex_enter(&udpf->uf_lock); IN6_IPADDR_TO_V4MAPPED(ac->ac_laddr, &udp->udp_v6src); mutex_exit(&udpf->uf_lock); break; case AF_INET6: if (tba->ADDR_length == sizeof (ipa6_conn_t)) { ac6 = (ipa6_conn_t *)addrp; } else { ASSERT(tba->ADDR_length == sizeof (ipa6_conn_x_t)); ac6 = &((ipa6_conn_x_t *) addrp)->ac6x_conn; } mutex_enter(&udpf->uf_lock); udp->udp_v6src = ac6->ac6_laddr; mutex_exit(&udpf->uf_lock); (void) udp_build_hdrs(udp); break; } } mp1 = mp1->b_cont; } udp->udp_pending_op = -1; rw_exit(&udp->udp_rwlock); /* * Look for one or more appended ACK message added by * udp_connect or udp_disconnect. * If none found just send up the T_BIND_ACK. * udp_connect has appended a T_OK_ACK and a T_CONN_CON. * udp_disconnect has appended a T_OK_ACK. */ if (mp1 != NULL) { if (mp->b_cont == mp1) mp->b_cont = NULL; else { ASSERT(mp->b_cont->b_cont == mp1); mp->b_cont->b_cont = NULL; } freemsg(mp); mp = mp1; while (mp != NULL) { mp1 = mp->b_cont; mp->b_cont = NULL; putnext(connp->conn_rq, mp); mp = mp1; } return; } freemsg(mp->b_cont); mp->b_cont = NULL; putnext(connp->conn_rq, mp); } static void udp_bind_error(conn_t *connp, mblk_t *mp) { udp_t *udp = connp->conn_udp; struct T_error_ack *tea; udp_fanout_t *udpf; udp_stack_t *us = udp->udp_us; tea = (struct T_error_ack *)mp->b_rptr; /* * If our O_T_BIND_REQ/T_BIND_REQ fails, * clear out the associated port and source * address before passing the message * upstream. If this was caused by a T_CONN_REQ * revert back to bound state. */ rw_enter(&udp->udp_rwlock, RW_WRITER); ASSERT(udp->udp_pending_op != -1); tea->ERROR_prim = udp->udp_pending_op; udp->udp_pending_op = -1; udpf = &us->us_bind_fanout[ UDP_BIND_HASH(udp->udp_port, us->us_bind_fanout_size)]; mutex_enter(&udpf->uf_lock); switch (tea->ERROR_prim) { case T_CONN_REQ: ASSERT(udp->udp_state == TS_DATA_XFER); /* Connect failed */ /* Revert back to the bound source */ udp->udp_v6src = udp->udp_bound_v6src; udp->udp_state = TS_IDLE; mutex_exit(&udpf->uf_lock); if (udp->udp_family == AF_INET6) (void) udp_build_hdrs(udp); rw_exit(&udp->udp_rwlock); break; case T_DISCON_REQ: case T_BIND_REQ: case O_T_BIND_REQ: V6_SET_ZERO(udp->udp_v6src); V6_SET_ZERO(udp->udp_bound_v6src); udp->udp_state = TS_UNBND; udp_bind_hash_remove(udp, B_TRUE); udp->udp_port = 0; mutex_exit(&udpf->uf_lock); if (udp->udp_family == AF_INET6) (void) udp_build_hdrs(udp); rw_exit(&udp->udp_rwlock); break; default: mutex_exit(&udpf->uf_lock); rw_exit(&udp->udp_rwlock); (void) mi_strlog(connp->conn_rq, 1, SL_ERROR|SL_TRACE, "udp_input_other: bad ERROR_prim, " "len %d", tea->ERROR_prim); } putnext(connp->conn_rq, mp); } /* * return SNMP stuff in buffer in mpdata. We don't hold any lock and report * information that can be changing beneath us. */ mblk_t * udp_snmp_get(queue_t *q, mblk_t *mpctl) { mblk_t *mpdata; mblk_t *mp_conn_ctl; mblk_t *mp_attr_ctl; mblk_t *mp6_conn_ctl; mblk_t *mp6_attr_ctl; mblk_t *mp_conn_tail; mblk_t *mp_attr_tail; mblk_t *mp6_conn_tail; mblk_t *mp6_attr_tail; struct opthdr *optp; mib2_udpEntry_t ude; mib2_udp6Entry_t ude6; mib2_transportMLPEntry_t mlp; int state; zoneid_t zoneid; int i; connf_t *connfp; conn_t *connp = Q_TO_CONN(q); int v4_conn_idx; int v6_conn_idx; boolean_t needattr; udp_t *udp; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; udp_stack_t *us = connp->conn_netstack->netstack_udp; mblk_t *mp2ctl; /* * make a copy of the original message */ mp2ctl = copymsg(mpctl); mp_conn_ctl = mp_attr_ctl = mp6_conn_ctl = NULL; if (mpctl == NULL || (mpdata = mpctl->b_cont) == NULL || (mp_conn_ctl = copymsg(mpctl)) == NULL || (mp_attr_ctl = copymsg(mpctl)) == NULL || (mp6_conn_ctl = copymsg(mpctl)) == NULL || (mp6_attr_ctl = copymsg(mpctl)) == NULL) { freemsg(mp_conn_ctl); freemsg(mp_attr_ctl); freemsg(mp6_conn_ctl); freemsg(mpctl); freemsg(mp2ctl); return (0); } zoneid = connp->conn_zoneid; /* fixed length structure for IPv4 and IPv6 counters */ SET_MIB(us->us_udp_mib.udpEntrySize, sizeof (mib2_udpEntry_t)); SET_MIB(us->us_udp_mib.udp6EntrySize, sizeof (mib2_udp6Entry_t)); /* synchronize 64- and 32-bit counters */ SYNC32_MIB(&us->us_udp_mib, udpInDatagrams, udpHCInDatagrams); SYNC32_MIB(&us->us_udp_mib, udpOutDatagrams, udpHCOutDatagrams); optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_UDP; optp->name = 0; (void) snmp_append_data(mpdata, (char *)&us->us_udp_mib, sizeof (us->us_udp_mib)); optp->len = msgdsize(mpdata); qreply(q, mpctl); mp_conn_tail = mp_attr_tail = mp6_conn_tail = mp6_attr_tail = NULL; v4_conn_idx = v6_conn_idx = 0; for (i = 0; i < CONN_G_HASH_SIZE; i++) { connfp = &ipst->ips_ipcl_globalhash_fanout[i]; connp = NULL; while ((connp = ipcl_get_next_conn(connfp, connp, IPCL_UDPCONN))) { udp = connp->conn_udp; if (zoneid != connp->conn_zoneid) continue; /* * Note that the port numbers are sent in * host byte order */ if (udp->udp_state == TS_UNBND) state = MIB2_UDP_unbound; else if (udp->udp_state == TS_IDLE) state = MIB2_UDP_idle; else if (udp->udp_state == TS_DATA_XFER) state = MIB2_UDP_connected; else state = MIB2_UDP_unknown; needattr = B_FALSE; bzero(&mlp, sizeof (mlp)); if (connp->conn_mlp_type != mlptSingle) { if (connp->conn_mlp_type == mlptShared || connp->conn_mlp_type == mlptBoth) mlp.tme_flags |= MIB2_TMEF_SHARED; if (connp->conn_mlp_type == mlptPrivate || connp->conn_mlp_type == mlptBoth) mlp.tme_flags |= MIB2_TMEF_PRIVATE; needattr = B_TRUE; } /* * Create an IPv4 table entry for IPv4 entries and also * any IPv6 entries which are bound to in6addr_any * (i.e. anything a IPv4 peer could connect/send to). */ if (udp->udp_ipversion == IPV4_VERSION || (udp->udp_state <= TS_IDLE && IN6_IS_ADDR_UNSPECIFIED(&udp->udp_v6src))) { ude.udpEntryInfo.ue_state = state; /* * If in6addr_any this will set it to * INADDR_ANY */ ude.udpLocalAddress = V4_PART_OF_V6(udp->udp_v6src); ude.udpLocalPort = ntohs(udp->udp_port); if (udp->udp_state == TS_DATA_XFER) { /* * Can potentially get here for * v6 socket if another process * (say, ping) has just done a * sendto(), changing the state * from the TS_IDLE above to * TS_DATA_XFER by the time we hit * this part of the code. */ ude.udpEntryInfo.ue_RemoteAddress = V4_PART_OF_V6(udp->udp_v6dst); ude.udpEntryInfo.ue_RemotePort = ntohs(udp->udp_dstport); } else { ude.udpEntryInfo.ue_RemoteAddress = 0; ude.udpEntryInfo.ue_RemotePort = 0; } /* * We make the assumption that all udp_t * structs will be created within an address * region no larger than 32-bits. */ ude.udpInstance = (uint32_t)(uintptr_t)udp; ude.udpCreationProcess = (udp->udp_open_pid < 0) ? MIB2_UNKNOWN_PROCESS : udp->udp_open_pid; ude.udpCreationTime = udp->udp_open_time; (void) snmp_append_data2(mp_conn_ctl->b_cont, &mp_conn_tail, (char *)&ude, sizeof (ude)); mlp.tme_connidx = v4_conn_idx++; if (needattr) (void) snmp_append_data2( mp_attr_ctl->b_cont, &mp_attr_tail, (char *)&mlp, sizeof (mlp)); } if (udp->udp_ipversion == IPV6_VERSION) { ude6.udp6EntryInfo.ue_state = state; ude6.udp6LocalAddress = udp->udp_v6src; ude6.udp6LocalPort = ntohs(udp->udp_port); ude6.udp6IfIndex = udp->udp_bound_if; if (udp->udp_state == TS_DATA_XFER) { ude6.udp6EntryInfo.ue_RemoteAddress = udp->udp_v6dst; ude6.udp6EntryInfo.ue_RemotePort = ntohs(udp->udp_dstport); } else { ude6.udp6EntryInfo.ue_RemoteAddress = sin6_null.sin6_addr; ude6.udp6EntryInfo.ue_RemotePort = 0; } /* * We make the assumption that all udp_t * structs will be created within an address * region no larger than 32-bits. */ ude6.udp6Instance = (uint32_t)(uintptr_t)udp; ude6.udp6CreationProcess = (udp->udp_open_pid < 0) ? MIB2_UNKNOWN_PROCESS : udp->udp_open_pid; ude6.udp6CreationTime = udp->udp_open_time; (void) snmp_append_data2(mp6_conn_ctl->b_cont, &mp6_conn_tail, (char *)&ude6, sizeof (ude6)); mlp.tme_connidx = v6_conn_idx++; if (needattr) (void) snmp_append_data2( mp6_attr_ctl->b_cont, &mp6_attr_tail, (char *)&mlp, sizeof (mlp)); } } } /* IPv4 UDP endpoints */ optp = (struct opthdr *)&mp_conn_ctl->b_rptr[ sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_UDP; optp->name = MIB2_UDP_ENTRY; optp->len = msgdsize(mp_conn_ctl->b_cont); qreply(q, mp_conn_ctl); /* table of MLP attributes... */ optp = (struct opthdr *)&mp_attr_ctl->b_rptr[ sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_UDP; optp->name = EXPER_XPORT_MLP; optp->len = msgdsize(mp_attr_ctl->b_cont); if (optp->len == 0) freemsg(mp_attr_ctl); else qreply(q, mp_attr_ctl); /* IPv6 UDP endpoints */ optp = (struct opthdr *)&mp6_conn_ctl->b_rptr[ sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_UDP6; optp->name = MIB2_UDP6_ENTRY; optp->len = msgdsize(mp6_conn_ctl->b_cont); qreply(q, mp6_conn_ctl); /* table of MLP attributes... */ optp = (struct opthdr *)&mp6_attr_ctl->b_rptr[ sizeof (struct T_optmgmt_ack)]; optp->level = MIB2_UDP6; optp->name = EXPER_XPORT_MLP; optp->len = msgdsize(mp6_attr_ctl->b_cont); if (optp->len == 0) freemsg(mp6_attr_ctl); else qreply(q, mp6_attr_ctl); return (mp2ctl); } /* * Return 0 if invalid set request, 1 otherwise, including non-udp requests. * NOTE: Per MIB-II, UDP has no writable data. * TODO: If this ever actually tries to set anything, it needs to be * to do the appropriate locking. */ /* ARGSUSED */ int udp_snmp_set(queue_t *q, t_scalar_t level, t_scalar_t name, uchar_t *ptr, int len) { switch (level) { case MIB2_UDP: return (0); default: return (1); } } static void udp_report_item(mblk_t *mp, udp_t *udp) { char *state; char addrbuf1[INET6_ADDRSTRLEN]; char addrbuf2[INET6_ADDRSTRLEN]; uint_t print_len, buf_len; buf_len = mp->b_datap->db_lim - mp->b_wptr; ASSERT(buf_len >= 0); if (buf_len == 0) return; if (udp->udp_state == TS_UNBND) state = "UNBOUND"; else if (udp->udp_state == TS_IDLE) state = "IDLE"; else if (udp->udp_state == TS_DATA_XFER) state = "CONNECTED"; else state = "UnkState"; print_len = snprintf((char *)mp->b_wptr, buf_len, MI_COL_PTRFMT_STR "%4d %5u %s %s %5u %s\n", (void *)udp, udp->udp_connp->conn_zoneid, ntohs(udp->udp_port), inet_ntop(AF_INET6, &udp->udp_v6src, addrbuf1, sizeof (addrbuf1)), inet_ntop(AF_INET6, &udp->udp_v6dst, addrbuf2, sizeof (addrbuf2)), ntohs(udp->udp_dstport), state); if (print_len < buf_len) { mp->b_wptr += print_len; } else { mp->b_wptr += buf_len; } } /* Report for ndd "udp_status" */ /* ARGSUSED */ static int udp_status_report(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr) { zoneid_t zoneid; connf_t *connfp; conn_t *connp = Q_TO_CONN(q); udp_t *udp = connp->conn_udp; int i; udp_stack_t *us = udp->udp_us; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; /* * Because of the ndd constraint, at most we can have 64K buffer * to put in all UDP info. So to be more efficient, just * allocate a 64K buffer here, assuming we need that large buffer. * This may be a problem as any user can read udp_status. Therefore * we limit the rate of doing this using us_ndd_get_info_interval. * This should be OK as normal users should not do this too often. */ if (cr == NULL || secpolicy_ip_config(cr, B_TRUE) != 0) { if (ddi_get_lbolt() - us->us_last_ndd_get_info_time < drv_usectohz(us->us_ndd_get_info_interval * 1000)) { (void) mi_mpprintf(mp, NDD_TOO_QUICK_MSG); return (0); } } if ((mp->b_cont = allocb(ND_MAX_BUF_LEN, BPRI_HI)) == NULL) { /* The following may work even if we cannot get a large buf. */ (void) mi_mpprintf(mp, NDD_OUT_OF_BUF_MSG); return (0); } (void) mi_mpprintf(mp, "UDP " MI_COL_HDRPAD_STR /* 12345678[89ABCDEF] */ " zone lport src addr dest addr port state"); /* 1234 12345 xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx 12345 UNBOUND */ zoneid = connp->conn_zoneid; for (i = 0; i < CONN_G_HASH_SIZE; i++) { connfp = &ipst->ips_ipcl_globalhash_fanout[i]; connp = NULL; while ((connp = ipcl_get_next_conn(connfp, connp, IPCL_UDPCONN))) { udp = connp->conn_udp; if (zoneid != GLOBAL_ZONEID && zoneid != connp->conn_zoneid) continue; udp_report_item(mp->b_cont, udp); } } us->us_last_ndd_get_info_time = ddi_get_lbolt(); return (0); } /* * This routine creates a T_UDERROR_IND message and passes it upstream. * The address and options are copied from the T_UNITDATA_REQ message * passed in mp. This message is freed. */ static void udp_ud_err(queue_t *q, mblk_t *mp, uchar_t *destaddr, t_scalar_t destlen, t_scalar_t err) { struct T_unitdata_req *tudr; mblk_t *mp1; uchar_t *optaddr; t_scalar_t optlen; if (DB_TYPE(mp) == M_DATA) { ASSERT(destaddr != NULL && destlen != 0); optaddr = NULL; optlen = 0; } else { if ((mp->b_wptr < mp->b_rptr) || (MBLKL(mp)) < sizeof (struct T_unitdata_req)) { goto done; } tudr = (struct T_unitdata_req *)mp->b_rptr; destaddr = mp->b_rptr + tudr->DEST_offset; if (destaddr < mp->b_rptr || destaddr >= mp->b_wptr || destaddr + tudr->DEST_length < mp->b_rptr || destaddr + tudr->DEST_length > mp->b_wptr) { goto done; } optaddr = mp->b_rptr + tudr->OPT_offset; if (optaddr < mp->b_rptr || optaddr >= mp->b_wptr || optaddr + tudr->OPT_length < mp->b_rptr || optaddr + tudr->OPT_length > mp->b_wptr) { goto done; } destlen = tudr->DEST_length; optlen = tudr->OPT_length; } mp1 = mi_tpi_uderror_ind((char *)destaddr, destlen, (char *)optaddr, optlen, err); if (mp1 != NULL) qreply(q, mp1); done: freemsg(mp); } /* * This routine removes a port number association from a stream. It * is called by udp_wput to handle T_UNBIND_REQ messages. */ static void udp_unbind(queue_t *q, mblk_t *mp) { udp_t *udp = Q_TO_UDP(q); udp_fanout_t *udpf; udp_stack_t *us = udp->udp_us; if (cl_inet_unbind != NULL) { /* * Running in cluster mode - register unbind information */ if (udp->udp_ipversion == IPV4_VERSION) { (*cl_inet_unbind)(IPPROTO_UDP, AF_INET, (uint8_t *)(&V4_PART_OF_V6(udp->udp_v6src)), (in_port_t)udp->udp_port); } else { (*cl_inet_unbind)(IPPROTO_UDP, AF_INET6, (uint8_t *)&(udp->udp_v6src), (in_port_t)udp->udp_port); } } rw_enter(&udp->udp_rwlock, RW_WRITER); if (udp->udp_state == TS_UNBND || udp->udp_pending_op != -1) { rw_exit(&udp->udp_rwlock); udp_err_ack(q, mp, TOUTSTATE, 0); return; } udp->udp_pending_op = T_UNBIND_REQ; rw_exit(&udp->udp_rwlock); /* * Pass the unbind to IP; T_UNBIND_REQ is larger than T_OK_ACK * and therefore ip_unbind must never return NULL. */ mp = ip_unbind(q, mp); ASSERT(mp != NULL); ASSERT(((struct T_ok_ack *)mp->b_rptr)->PRIM_type == T_OK_ACK); /* * Once we're unbound from IP, the pending operation may be cleared * here. */ rw_enter(&udp->udp_rwlock, RW_WRITER); udpf = &us->us_bind_fanout[UDP_BIND_HASH(udp->udp_port, us->us_bind_fanout_size)]; mutex_enter(&udpf->uf_lock); udp_bind_hash_remove(udp, B_TRUE); V6_SET_ZERO(udp->udp_v6src); V6_SET_ZERO(udp->udp_bound_v6src); udp->udp_port = 0; mutex_exit(&udpf->uf_lock); udp->udp_pending_op = -1; udp->udp_state = TS_UNBND; if (udp->udp_family == AF_INET6) (void) udp_build_hdrs(udp); rw_exit(&udp->udp_rwlock); qreply(q, mp); } /* * Don't let port fall into the privileged range. * Since the extra privileged ports can be arbitrary we also * ensure that we exclude those from consideration. * us->us_epriv_ports is not sorted thus we loop over it until * there are no changes. */ static in_port_t udp_update_next_port(udp_t *udp, in_port_t port, boolean_t random) { int i; in_port_t nextport; boolean_t restart = B_FALSE; udp_stack_t *us = udp->udp_us; if (random && udp_random_anon_port != 0) { (void) random_get_pseudo_bytes((uint8_t *)&port, sizeof (in_port_t)); /* * Unless changed by a sys admin, the smallest anon port * is 32768 and the largest anon port is 65535. It is * very likely (50%) for the random port to be smaller * than the smallest anon port. When that happens, * add port % (anon port range) to the smallest anon * port to get the random port. It should fall into the * valid anon port range. */ if (port < us->us_smallest_anon_port) { port = us->us_smallest_anon_port + port % (us->us_largest_anon_port - us->us_smallest_anon_port); } } retry: if (port < us->us_smallest_anon_port) port = us->us_smallest_anon_port; if (port > us->us_largest_anon_port) { port = us->us_smallest_anon_port; if (restart) return (0); restart = B_TRUE; } if (port < us->us_smallest_nonpriv_port) port = us->us_smallest_nonpriv_port; for (i = 0; i < us->us_num_epriv_ports; i++) { if (port == us->us_epriv_ports[i]) { port++; /* * Make sure that the port is in the * valid range. */ goto retry; } } if (is_system_labeled() && (nextport = tsol_next_port(crgetzone(udp->udp_connp->conn_cred), port, IPPROTO_UDP, B_TRUE)) != 0) { port = nextport; goto retry; } return (port); } static int udp_update_label(queue_t *wq, mblk_t *mp, ipaddr_t dst) { int err; uchar_t opt_storage[IP_MAX_OPT_LENGTH]; udp_t *udp = Q_TO_UDP(wq); udp_stack_t *us = udp->udp_us; err = tsol_compute_label(DB_CREDDEF(mp, udp->udp_connp->conn_cred), dst, opt_storage, udp->udp_connp->conn_mac_exempt, us->us_netstack->netstack_ip); if (err == 0) { err = tsol_update_options(&udp->udp_ip_snd_options, &udp->udp_ip_snd_options_len, &udp->udp_label_len, opt_storage); } if (err != 0) { DTRACE_PROBE4( tx__ip__log__info__updatelabel__udp, char *, "queue(1) failed to update options(2) on mp(3)", queue_t *, wq, char *, opt_storage, mblk_t *, mp); } else { IN6_IPADDR_TO_V4MAPPED(dst, &udp->udp_v6lastdst); } return (err); } static mblk_t * udp_output_v4(conn_t *connp, mblk_t *mp, ipaddr_t v4dst, uint16_t port, uint_t srcid, int *error, boolean_t insert_spi) { udp_t *udp = connp->conn_udp; queue_t *q = connp->conn_wq; mblk_t *mp1 = mp; mblk_t *mp2; ipha_t *ipha; int ip_hdr_length; uint32_t ip_len; udpha_t *udpha; boolean_t lock_held = B_FALSE; in_port_t uha_src_port; udpattrs_t attrs; uchar_t ip_snd_opt[IP_MAX_OPT_LENGTH]; uint32_t ip_snd_opt_len = 0; ip4_pkt_t pktinfo; ip4_pkt_t *pktinfop = &pktinfo; ip_opt_info_t optinfo; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; udp_stack_t *us = udp->udp_us; ipsec_stack_t *ipss = ipst->ips_netstack->netstack_ipsec; *error = 0; pktinfop->ip4_ill_index = 0; pktinfop->ip4_addr = INADDR_ANY; optinfo.ip_opt_flags = 0; optinfo.ip_opt_ill_index = 0; if (v4dst == INADDR_ANY) v4dst = htonl(INADDR_LOOPBACK); /* * If options passed in, feed it for verification and handling */ attrs.udpattr_credset = B_FALSE; if (DB_TYPE(mp) != M_DATA) { mp1 = mp->b_cont; if (((struct T_unitdata_req *)mp->b_rptr)->OPT_length != 0) { attrs.udpattr_ipp4 = pktinfop; attrs.udpattr_mb = mp; if (udp_unitdata_opt_process(q, mp, error, &attrs) < 0) goto done; /* * Note: success in processing options. * mp option buffer represented by * OPT_length/offset now potentially modified * and contain option setting results */ ASSERT(*error == 0); } } /* mp1 points to the M_DATA mblk carrying the packet */ ASSERT(mp1 != NULL && DB_TYPE(mp1) == M_DATA); rw_enter(&udp->udp_rwlock, RW_READER); lock_held = B_TRUE; /* * Check if our saved options are valid; update if not. * TSOL Note: Since we are not in WRITER mode, UDP packets * to different destination may require different labels, * or worse, UDP packets to same IP address may require * different labels due to use of shared all-zones address. * We use conn_lock to ensure that lastdst, ip_snd_options, * and ip_snd_options_len are consistent for the current * destination and are updated atomically. */ mutex_enter(&connp->conn_lock); if (is_system_labeled()) { /* Using UDP MLP requires SCM_UCRED from user */ if (connp->conn_mlp_type != mlptSingle && !attrs.udpattr_credset) { mutex_exit(&connp->conn_lock); DTRACE_PROBE4( tx__ip__log__info__output__udp, char *, "MLP mp(1) lacks SCM_UCRED attr(2) on q(3)", mblk_t *, mp1, udpattrs_t *, &attrs, queue_t *, q); *error = ECONNREFUSED; goto done; } /* * update label option for this UDP socket if * - the destination has changed, or * - the UDP socket is MLP */ if ((!IN6_IS_ADDR_V4MAPPED(&udp->udp_v6lastdst) || V4_PART_OF_V6(udp->udp_v6lastdst) != v4dst || connp->conn_mlp_type != mlptSingle) && (*error = udp_update_label(q, mp, v4dst)) != 0) { mutex_exit(&connp->conn_lock); goto done; } } if (udp->udp_ip_snd_options_len > 0) { ip_snd_opt_len = udp->udp_ip_snd_options_len; bcopy(udp->udp_ip_snd_options, ip_snd_opt, ip_snd_opt_len); } mutex_exit(&connp->conn_lock); /* Add an IP header */ ip_hdr_length = IP_SIMPLE_HDR_LENGTH + UDPH_SIZE + ip_snd_opt_len + (insert_spi ? sizeof (uint32_t) : 0); ipha = (ipha_t *)&mp1->b_rptr[-ip_hdr_length]; if (DB_REF(mp1) != 1 || (uchar_t *)ipha < DB_BASE(mp1) || !OK_32PTR(ipha)) { mp2 = allocb(ip_hdr_length + us->us_wroff_extra, BPRI_LO); if (mp2 == NULL) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "allocbfail2"); *error = ENOMEM; goto done; } mp2->b_wptr = DB_LIM(mp2); mp2->b_cont = mp1; mp1 = mp2; if (DB_TYPE(mp) != M_DATA) mp->b_cont = mp1; else mp = mp1; ipha = (ipha_t *)(mp1->b_wptr - ip_hdr_length); } ip_hdr_length -= (UDPH_SIZE + (insert_spi ? sizeof (uint32_t) : 0)); #ifdef _BIG_ENDIAN /* Set version, header length, and tos */ *(uint16_t *)&ipha->ipha_version_and_hdr_length = ((((IP_VERSION << 4) | (ip_hdr_length>>2)) << 8) | udp->udp_type_of_service); /* Set ttl and protocol */ *(uint16_t *)&ipha->ipha_ttl = (udp->udp_ttl << 8) | IPPROTO_UDP; #else /* Set version, header length, and tos */ *(uint16_t *)&ipha->ipha_version_and_hdr_length = ((udp->udp_type_of_service << 8) | ((IP_VERSION << 4) | (ip_hdr_length>>2))); /* Set ttl and protocol */ *(uint16_t *)&ipha->ipha_ttl = (IPPROTO_UDP << 8) | udp->udp_ttl; #endif if (pktinfop->ip4_addr != INADDR_ANY) { ipha->ipha_src = pktinfop->ip4_addr; optinfo.ip_opt_flags = IP_VERIFY_SRC; } else { /* * Copy our address into the packet. If this is zero, * first look at __sin6_src_id for a hint. If we leave the * source as INADDR_ANY then ip will fill in the real source * address. */ IN6_V4MAPPED_TO_IPADDR(&udp->udp_v6src, ipha->ipha_src); if (srcid != 0 && ipha->ipha_src == INADDR_ANY) { in6_addr_t v6src; ip_srcid_find_id(srcid, &v6src, connp->conn_zoneid, us->us_netstack); IN6_V4MAPPED_TO_IPADDR(&v6src, ipha->ipha_src); } } uha_src_port = udp->udp_port; if (ip_hdr_length == IP_SIMPLE_HDR_LENGTH) { rw_exit(&udp->udp_rwlock); lock_held = B_FALSE; } if (pktinfop->ip4_ill_index != 0) { optinfo.ip_opt_ill_index = pktinfop->ip4_ill_index; } ipha->ipha_fragment_offset_and_flags = 0; ipha->ipha_ident = 0; mp1->b_rptr = (uchar_t *)ipha; ASSERT((uintptr_t)(mp1->b_wptr - (uchar_t *)ipha) <= (uintptr_t)UINT_MAX); /* Determine length of packet */ ip_len = (uint32_t)(mp1->b_wptr - (uchar_t *)ipha); if ((mp2 = mp1->b_cont) != NULL) { do { ASSERT((uintptr_t)MBLKL(mp2) <= (uintptr_t)UINT_MAX); ip_len += (uint32_t)MBLKL(mp2); } while ((mp2 = mp2->b_cont) != NULL); } /* * If the size of the packet is greater than the maximum allowed by * ip, return an error. Passing this down could cause panics because * the size will have wrapped and be inconsistent with the msg size. */ if (ip_len > IP_MAXPACKET) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "IP length exceeded"); *error = EMSGSIZE; goto done; } ipha->ipha_length = htons((uint16_t)ip_len); ip_len -= ip_hdr_length; ip_len = htons((uint16_t)ip_len); udpha = (udpha_t *)(((uchar_t *)ipha) + ip_hdr_length); /* Insert all-0s SPI now. */ if (insert_spi) *((uint32_t *)(udpha + 1)) = 0; /* * Copy in the destination address */ ipha->ipha_dst = v4dst; /* * Set ttl based on IP_MULTICAST_TTL to match IPv6 logic. */ if (CLASSD(v4dst)) ipha->ipha_ttl = udp->udp_multicast_ttl; udpha->uha_dst_port = port; udpha->uha_src_port = uha_src_port; if (ip_snd_opt_len > 0) { uint32_t cksum; bcopy(ip_snd_opt, &ipha[1], ip_snd_opt_len); lock_held = B_FALSE; rw_exit(&udp->udp_rwlock); /* * Massage source route putting first source route in ipha_dst. * Ignore the destination in T_unitdata_req. * Create a checksum adjustment for a source route, if any. */ cksum = ip_massage_options(ipha, us->us_netstack); cksum = (cksum & 0xFFFF) + (cksum >> 16); cksum -= ((ipha->ipha_dst >> 16) & 0xFFFF) + (ipha->ipha_dst & 0xFFFF); if ((int)cksum < 0) cksum--; cksum = (cksum & 0xFFFF) + (cksum >> 16); /* * IP does the checksum if uha_checksum is non-zero, * We make it easy for IP to include our pseudo header * by putting our length in uha_checksum. */ cksum += ip_len; cksum = (cksum & 0xFFFF) + (cksum >> 16); /* There might be a carry. */ cksum = (cksum & 0xFFFF) + (cksum >> 16); #ifdef _LITTLE_ENDIAN if (us->us_do_checksum) ip_len = (cksum << 16) | ip_len; #else if (us->us_do_checksum) ip_len = (ip_len << 16) | cksum; else ip_len <<= 16; #endif } else { /* * IP does the checksum if uha_checksum is non-zero, * We make it easy for IP to include our pseudo header * by putting our length in uha_checksum. */ if (us->us_do_checksum) ip_len |= (ip_len << 16); #ifndef _LITTLE_ENDIAN else ip_len <<= 16; #endif } ASSERT(!lock_held); /* Set UDP length and checksum */ *((uint32_t *)&udpha->uha_length) = ip_len; if (DB_CRED(mp) != NULL) mblk_setcred(mp1, DB_CRED(mp)); if (DB_TYPE(mp) != M_DATA) { ASSERT(mp != mp1); freeb(mp); } /* mp has been consumed and we'll return success */ ASSERT(*error == 0); mp = NULL; /* We're done. Pass the packet to ip. */ BUMP_MIB(&us->us_udp_mib, udpHCOutDatagrams); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "end"); if ((connp->conn_flags & IPCL_CHECK_POLICY) != 0 || CONN_OUTBOUND_POLICY_PRESENT(connp, ipss) || connp->conn_dontroute || connp->conn_nofailover_ill != NULL || connp->conn_outgoing_ill != NULL || optinfo.ip_opt_flags != 0 || optinfo.ip_opt_ill_index != 0 || ipha->ipha_version_and_hdr_length != IP_SIMPLE_HDR_VERSION || IPP_ENABLED(IPP_LOCAL_OUT, ipst) || ipst->ips_ip_g_mrouter != NULL) { UDP_STAT(us, udp_ip_send); ip_output_options(connp, mp1, connp->conn_wq, IP_WPUT, &optinfo); } else { udp_send_data(udp, connp->conn_wq, mp1, ipha); } done: if (lock_held) rw_exit(&udp->udp_rwlock); if (*error != 0) { ASSERT(mp != NULL); BUMP_MIB(&us->us_udp_mib, udpOutErrors); } return (mp); } static void udp_send_data(udp_t *udp, queue_t *q, mblk_t *mp, ipha_t *ipha) { conn_t *connp = udp->udp_connp; ipaddr_t src, dst; ire_t *ire; ipif_t *ipif = NULL; mblk_t *ire_fp_mp; boolean_t retry_caching; udp_stack_t *us = udp->udp_us; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; dst = ipha->ipha_dst; src = ipha->ipha_src; ASSERT(ipha->ipha_ident == 0); if (CLASSD(dst)) { int err; ipif = conn_get_held_ipif(connp, &connp->conn_multicast_ipif, &err); if (ipif == NULL || ipif->ipif_isv6 || (ipif->ipif_ill->ill_phyint->phyint_flags & PHYI_LOOPBACK)) { if (ipif != NULL) ipif_refrele(ipif); UDP_STAT(us, udp_ip_send); ip_output(connp, mp, q, IP_WPUT); return; } } retry_caching = B_FALSE; mutex_enter(&connp->conn_lock); ire = connp->conn_ire_cache; ASSERT(!(connp->conn_state_flags & CONN_INCIPIENT)); if (ire == NULL || ire->ire_addr != dst || (ire->ire_marks & IRE_MARK_CONDEMNED)) { retry_caching = B_TRUE; } else if (CLASSD(dst) && (ire->ire_type & IRE_CACHE)) { ill_t *stq_ill = (ill_t *)ire->ire_stq->q_ptr; ASSERT(ipif != NULL); if (stq_ill != ipif->ipif_ill && (stq_ill->ill_group == NULL || stq_ill->ill_group != ipif->ipif_ill->ill_group)) retry_caching = B_TRUE; } if (!retry_caching) { ASSERT(ire != NULL); IRE_REFHOLD(ire); mutex_exit(&connp->conn_lock); } else { boolean_t cached = B_FALSE; connp->conn_ire_cache = NULL; mutex_exit(&connp->conn_lock); /* Release the old ire */ if (ire != NULL) { IRE_REFRELE_NOTR(ire); ire = NULL; } if (CLASSD(dst)) { ASSERT(ipif != NULL); ire = ire_ctable_lookup(dst, 0, 0, ipif, connp->conn_zoneid, MBLK_GETLABEL(mp), MATCH_IRE_ILL_GROUP, ipst); } else { ASSERT(ipif == NULL); ire = ire_cache_lookup(dst, connp->conn_zoneid, MBLK_GETLABEL(mp), ipst); } if (ire == NULL) { if (ipif != NULL) ipif_refrele(ipif); UDP_STAT(us, udp_ire_null); ip_output(connp, mp, q, IP_WPUT); return; } IRE_REFHOLD_NOTR(ire); mutex_enter(&connp->conn_lock); if (CONN_CACHE_IRE(connp) && connp->conn_ire_cache == NULL && !(ire->ire_marks & IRE_MARK_CONDEMNED)) { irb_t *irb = ire->ire_bucket; /* * IRE's created for non-connection oriented transports * are normally initialized with IRE_MARK_TEMPORARY set * in the ire_marks. These IRE's are preferentially * reaped when the hash chain length in the cache * bucket exceeds the maximum value specified in * ip[6]_ire_max_bucket_cnt. This can severely affect * UDP performance if IRE cache entries that we need * to reuse are continually removed. To remedy this, * when we cache the IRE in the conn_t, we remove the * IRE_MARK_TEMPORARY bit from the ire_marks if it was * set. */ if (ire->ire_marks & IRE_MARK_TEMPORARY) { rw_enter(&irb->irb_lock, RW_WRITER); if (ire->ire_marks & IRE_MARK_TEMPORARY) { ire->ire_marks &= ~IRE_MARK_TEMPORARY; irb->irb_tmp_ire_cnt--; } rw_exit(&irb->irb_lock); } connp->conn_ire_cache = ire; cached = B_TRUE; } mutex_exit(&connp->conn_lock); /* * We can continue to use the ire but since it was not * cached, we should drop the extra reference. */ if (!cached) IRE_REFRELE_NOTR(ire); } ASSERT(ire != NULL && ire->ire_ipversion == IPV4_VERSION); ASSERT(!CLASSD(dst) || ipif != NULL); /* * Check if we can take the fast-path. * Note that "incomplete" ire's (where the link-layer for next hop * is not resolved, or where the fast-path header in nce_fp_mp is not * available yet) are sent down the legacy (slow) path */ if ((ire->ire_type & (IRE_BROADCAST|IRE_LOCAL|IRE_LOOPBACK)) || (ire->ire_flags & RTF_MULTIRT) || (ire->ire_stq == NULL) || (ire->ire_max_frag < ntohs(ipha->ipha_length)) || ((ire->ire_nce == NULL) || ((ire_fp_mp = ire->ire_nce->nce_fp_mp) == NULL)) || connp->conn_nexthop_set || (MBLKL(ire_fp_mp) > MBLKHEAD(mp))) { if (ipif != NULL) ipif_refrele(ipif); UDP_STAT(us, udp_ip_ire_send); IRE_REFRELE(ire); ip_output(connp, mp, q, IP_WPUT); return; } if (src == INADDR_ANY && !connp->conn_unspec_src) { if (CLASSD(dst) && !(ire->ire_flags & RTF_SETSRC)) ipha->ipha_src = ipif->ipif_src_addr; else ipha->ipha_src = ire->ire_src_addr; } if (ipif != NULL) ipif_refrele(ipif); udp_xmit(connp->conn_wq, mp, ire, connp, connp->conn_zoneid); } static void udp_xmit(queue_t *q, mblk_t *mp, ire_t *ire, conn_t *connp, zoneid_t zoneid) { ipaddr_t src, dst; ill_t *ill; mblk_t *ire_fp_mp; uint_t ire_fp_mp_len; uint16_t *up; uint32_t cksum, hcksum_txflags; queue_t *dev_q; udp_t *udp = connp->conn_udp; ipha_t *ipha = (ipha_t *)mp->b_rptr; udp_stack_t *us = udp->udp_us; ip_stack_t *ipst = connp->conn_netstack->netstack_ip; boolean_t ll_multicast = B_FALSE; dev_q = ire->ire_stq->q_next; ASSERT(dev_q != NULL); if (DEV_Q_IS_FLOW_CTLED(dev_q)) { BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsHCOutRequests); BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards); if (ipst->ips_ip_output_queue) (void) putq(connp->conn_wq, mp); else freemsg(mp); ire_refrele(ire); return; } ire_fp_mp = ire->ire_nce->nce_fp_mp; ire_fp_mp_len = MBLKL(ire_fp_mp); ASSERT(MBLKHEAD(mp) >= ire_fp_mp_len); dst = ipha->ipha_dst; src = ipha->ipha_src; ill = ire_to_ill(ire); ASSERT(ill != NULL); BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutRequests); ipha->ipha_ident = (uint16_t)atomic_add_32_nv(&ire->ire_ident, 1); #ifndef _BIG_ENDIAN ipha->ipha_ident = (ipha->ipha_ident << 8) | (ipha->ipha_ident >> 8); #endif if (ILL_HCKSUM_CAPABLE(ill) && dohwcksum) { ASSERT(ill->ill_hcksum_capab != NULL); hcksum_txflags = ill->ill_hcksum_capab->ill_hcksum_txflags; } else { hcksum_txflags = 0; } /* pseudo-header checksum (do it in parts for IP header checksum) */ cksum = (dst >> 16) + (dst & 0xFFFF) + (src >> 16) + (src & 0xFFFF); ASSERT(ipha->ipha_version_and_hdr_length == IP_SIMPLE_HDR_VERSION); up = IPH_UDPH_CHECKSUMP(ipha, IP_SIMPLE_HDR_LENGTH); if (*up != 0) { IP_CKSUM_XMIT_FAST(ire->ire_ipversion, hcksum_txflags, mp, ipha, up, IPPROTO_UDP, IP_SIMPLE_HDR_LENGTH, ntohs(ipha->ipha_length), cksum); /* Software checksum? */ if (DB_CKSUMFLAGS(mp) == 0) { UDP_STAT(us, udp_out_sw_cksum); UDP_STAT_UPDATE(us, udp_out_sw_cksum_bytes, ntohs(ipha->ipha_length) - IP_SIMPLE_HDR_LENGTH); } } if (!CLASSD(dst)) { ipha->ipha_fragment_offset_and_flags |= (uint32_t)htons(ire->ire_frag_flag); } /* Calculate IP header checksum if hardware isn't capable */ if (!(DB_CKSUMFLAGS(mp) & HCK_IPV4_HDRCKSUM)) { IP_HDR_CKSUM(ipha, cksum, ((uint32_t *)ipha)[0], ((uint16_t *)ipha)[4]); } if (CLASSD(dst)) { boolean_t ilm_exists; ILM_WALKER_HOLD(ill); ilm_exists = (ilm_lookup_ill(ill, dst, ALL_ZONES) != NULL); ILM_WALKER_RELE(ill); if (ilm_exists) { ip_multicast_loopback(q, ill, mp, connp->conn_multicast_loop ? 0 : IP_FF_NO_MCAST_LOOP, zoneid); } /* If multicast TTL is 0 then we are done */ if (ipha->ipha_ttl == 0) { freemsg(mp); ire_refrele(ire); return; } ll_multicast = B_TRUE; } ASSERT(DB_TYPE(ire_fp_mp) == M_DATA); mp->b_rptr = (uchar_t *)ipha - ire_fp_mp_len; bcopy(ire_fp_mp->b_rptr, mp->b_rptr, ire_fp_mp_len); UPDATE_OB_PKT_COUNT(ire); ire->ire_last_used_time = lbolt; BUMP_MIB(ill->ill_ip_mib, ipIfStatsHCOutTransmits); UPDATE_MIB(ill->ill_ip_mib, ipIfStatsHCOutOctets, ntohs(ipha->ipha_length)); if (ILL_DLS_CAPABLE(ill)) { /* * Send the packet directly to DLD, where it may be queued * depending on the availability of transmit resources at * the media layer. */ IP_DLS_ILL_TX(ill, ipha, mp, ipst); } else { DTRACE_PROBE4(ip4__physical__out__start, ill_t *, NULL, ill_t *, ill, ipha_t *, ipha, mblk_t *, mp); FW_HOOKS(ipst->ips_ip4_physical_out_event, ipst->ips_ipv4firewall_physical_out, NULL, ill, ipha, mp, mp, ll_multicast, ipst); DTRACE_PROBE1(ip4__physical__out__end, mblk_t *, mp); if (mp != NULL) putnext(ire->ire_stq, mp); } IRE_REFRELE(ire); } static boolean_t udp_update_label_v6(queue_t *wq, mblk_t *mp, in6_addr_t *dst) { udp_t *udp = Q_TO_UDP(wq); int err; uchar_t opt_storage[TSOL_MAX_IPV6_OPTION]; udp_stack_t *us = udp->udp_us; err = tsol_compute_label_v6(DB_CREDDEF(mp, udp->udp_connp->conn_cred), dst, opt_storage, udp->udp_connp->conn_mac_exempt, us->us_netstack->netstack_ip); if (err == 0) { err = tsol_update_sticky(&udp->udp_sticky_ipp, &udp->udp_label_len_v6, opt_storage); } if (err != 0) { DTRACE_PROBE4( tx__ip__log__drop__updatelabel__udp6, char *, "queue(1) failed to update options(2) on mp(3)", queue_t *, wq, char *, opt_storage, mblk_t *, mp); } else { udp->udp_v6lastdst = *dst; } return (err); } void udp_output_connected(void *arg, mblk_t *mp) { conn_t *connp = (conn_t *)arg; udp_t *udp = connp->conn_udp; udp_stack_t *us = udp->udp_us; ipaddr_t v4dst; in_port_t dstport; boolean_t mapped_addr; struct sockaddr_storage ss; sin_t *sin; sin6_t *sin6; struct sockaddr *addr; socklen_t addrlen; int error; boolean_t insert_spi = udp->udp_nat_t_endpoint; /* M_DATA for connected socket */ ASSERT(udp->udp_issocket); UDP_DBGSTAT(us, udp_data_conn); mutex_enter(&connp->conn_lock); if (udp->udp_state != TS_DATA_XFER) { mutex_exit(&connp->conn_lock); BUMP_MIB(&us->us_udp_mib, udpOutErrors); UDP_STAT(us, udp_out_err_notconn); freemsg(mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: connp %p (%S)", connp, "not-connected; address required"); return; } mapped_addr = IN6_IS_ADDR_V4MAPPED(&udp->udp_v6dst); if (mapped_addr) IN6_V4MAPPED_TO_IPADDR(&udp->udp_v6dst, v4dst); /* Initialize addr and addrlen as if they're passed in */ if (udp->udp_family == AF_INET) { sin = (sin_t *)&ss; sin->sin_family = AF_INET; dstport = sin->sin_port = udp->udp_dstport; ASSERT(mapped_addr); sin->sin_addr.s_addr = v4dst; addr = (struct sockaddr *)sin; addrlen = sizeof (*sin); } else { sin6 = (sin6_t *)&ss; sin6->sin6_family = AF_INET6; dstport = sin6->sin6_port = udp->udp_dstport; sin6->sin6_flowinfo = udp->udp_flowinfo; sin6->sin6_addr = udp->udp_v6dst; sin6->sin6_scope_id = 0; sin6->__sin6_src_id = 0; addr = (struct sockaddr *)sin6; addrlen = sizeof (*sin6); } mutex_exit(&connp->conn_lock); if (mapped_addr) { /* * Handle both AF_INET and AF_INET6; the latter * for IPV4 mapped destination addresses. Note * here that both addr and addrlen point to the * corresponding struct depending on the address * family of the socket. */ mp = udp_output_v4(connp, mp, v4dst, dstport, 0, &error, insert_spi); } else { mp = udp_output_v6(connp, mp, sin6, &error); } if (error == 0) { ASSERT(mp == NULL); return; } UDP_STAT(us, udp_out_err_output); ASSERT(mp != NULL); /* mp is freed by the following routine */ udp_ud_err(connp->conn_wq, mp, (uchar_t *)addr, (t_scalar_t)addrlen, (t_scalar_t)error); } /* * This routine handles all messages passed downstream. It either * consumes the message or passes it downstream; it never queues a * a message. * * Also entry point for sockfs when udp is in "direct sockfs" mode. This mode * is valid when we are directly beneath the stream head, and thus sockfs * is able to bypass STREAMS and directly call us, passing along the sockaddr * structure without the cumbersome T_UNITDATA_REQ interface for the case of * connected endpoints. */ void udp_wput(queue_t *q, mblk_t *mp) { sin6_t *sin6; sin_t *sin; ipaddr_t v4dst; uint16_t port; uint_t srcid; conn_t *connp = Q_TO_CONN(q); udp_t *udp = connp->conn_udp; int error = 0; struct sockaddr *addr; socklen_t addrlen; udp_stack_t *us = udp->udp_us; boolean_t insert_spi = udp->udp_nat_t_endpoint; TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_START, "udp_wput_start: queue %p mp %p", q, mp); /* * We directly handle several cases here: T_UNITDATA_REQ message * coming down as M_PROTO/M_PCPROTO and M_DATA messages for connected * socket. */ switch (DB_TYPE(mp)) { case M_DATA: /* * Quick check for error cases. Checks will be done again * under the lock later on */ if (!udp->udp_direct_sockfs || udp->udp_state != TS_DATA_XFER) { /* Not connected; address is required */ BUMP_MIB(&us->us_udp_mib, udpOutErrors); UDP_STAT(us, udp_out_err_notconn); freemsg(mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: connp %p (%S)", connp, "not-connected; address required"); return; } udp_output_connected(connp, mp); return; case M_PROTO: case M_PCPROTO: { struct T_unitdata_req *tudr; ASSERT((uintptr_t)MBLKL(mp) <= (uintptr_t)INT_MAX); tudr = (struct T_unitdata_req *)mp->b_rptr; /* Handle valid T_UNITDATA_REQ here */ if (MBLKL(mp) >= sizeof (*tudr) && ((t_primp_t)mp->b_rptr)->type == T_UNITDATA_REQ) { if (mp->b_cont == NULL) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "badaddr"); error = EPROTO; goto ud_error; } if (!MBLKIN(mp, 0, tudr->DEST_offset + tudr->DEST_length)) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "badaddr"); error = EADDRNOTAVAIL; goto ud_error; } /* * If a port has not been bound to the stream, fail. * This is not a problem when sockfs is directly * above us, because it will ensure that the socket * is first bound before allowing data to be sent. */ if (udp->udp_state == TS_UNBND) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "outstate"); error = EPROTO; goto ud_error; } addr = (struct sockaddr *) &mp->b_rptr[tudr->DEST_offset]; addrlen = tudr->DEST_length; if (tudr->OPT_length != 0) UDP_STAT(us, udp_out_opt); break; } /* FALLTHRU */ } default: udp_wput_other(q, mp); return; } ASSERT(addr != NULL); switch (udp->udp_family) { case AF_INET6: sin6 = (sin6_t *)addr; if (!OK_32PTR((char *)sin6) || (addrlen != sizeof (sin6_t)) || (sin6->sin6_family != AF_INET6)) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "badaddr"); error = EADDRNOTAVAIL; goto ud_error; } if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { /* * Destination is a non-IPv4-compatible IPv6 address. * Send out an IPv6 format packet. */ mp = udp_output_v6(connp, mp, sin6, &error); if (error != 0) goto ud_error; TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "udp_output_v6"); return; } /* * If the local address is not zero or a mapped address * return an error. It would be possible to send an IPv4 * packet but the response would never make it back to the * application since it is bound to a non-mapped address. */ if (!IN6_IS_ADDR_V4MAPPED(&udp->udp_v6src) && !IN6_IS_ADDR_UNSPECIFIED(&udp->udp_v6src)) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "badaddr"); error = EADDRNOTAVAIL; goto ud_error; } /* Send IPv4 packet without modifying udp_ipversion */ /* Extract port and ipaddr */ port = sin6->sin6_port; IN6_V4MAPPED_TO_IPADDR(&sin6->sin6_addr, v4dst); srcid = sin6->__sin6_src_id; break; case AF_INET: sin = (sin_t *)addr; if ((!OK_32PTR((char *)sin) || addrlen != sizeof (sin_t)) || (sin->sin_family != AF_INET)) { TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_END, "udp_wput_end: q %p (%S)", q, "badaddr"); error = EADDRNOTAVAIL; goto ud_error; } /* Extract port and ipaddr */ port = sin->sin_port; v4dst = sin->sin_addr.s_addr; srcid = 0; break; } mp = udp_output_v4(connp, mp, v4dst, port, srcid, &error, insert_spi); if (error != 0) { ud_error: UDP_STAT(us, udp_out_err_output); ASSERT(mp != NULL); /* mp is freed by the following routine */ udp_ud_err(q, mp, (uchar_t *)addr, (t_scalar_t)addrlen, (t_scalar_t)error); } } /* * udp_output_v6(): * Assumes that udp_wput did some sanity checking on the destination * address. */ static mblk_t * udp_output_v6(conn_t *connp, mblk_t *mp, sin6_t *sin6, int *error) { ip6_t *ip6h; ip6i_t *ip6i; /* mp1->b_rptr even if no ip6i_t */ mblk_t *mp1 = mp; mblk_t *mp2; int udp_ip_hdr_len = IPV6_HDR_LEN + UDPH_SIZE; size_t ip_len; udpha_t *udph; udp_t *udp = connp->conn_udp; queue_t *q = connp->conn_wq; ip6_pkt_t ipp_s; /* For ancillary data options */ ip6_pkt_t *ipp = &ipp_s; ip6_pkt_t *tipp; /* temporary ipp */ uint32_t csum = 0; uint_t ignore = 0; uint_t option_exists = 0, is_sticky = 0; uint8_t *cp; uint8_t *nxthdr_ptr; in6_addr_t ip6_dst; udpattrs_t attrs; boolean_t opt_present; ip6_hbh_t *hopoptsptr = NULL; uint_t hopoptslen = 0; boolean_t is_ancillary = B_FALSE; udp_stack_t *us = udp->udp_us; size_t sth_wroff = 0; *error = 0; /* * If the local address is a mapped address return * an error. * It would be possible to send an IPv6 packet but the * response would never make it back to the application * since it is bound to a mapped address. */ if (IN6_IS_ADDR_V4MAPPED(&udp->udp_v6src)) { *error = EADDRNOTAVAIL; goto done; } ipp->ipp_fields = 0; ipp->ipp_sticky_ignored = 0; /* * If TPI options passed in, feed it for verification and handling */ attrs.udpattr_credset = B_FALSE; opt_present = B_FALSE; if (DB_TYPE(mp) != M_DATA) { mp1 = mp->b_cont; if (((struct T_unitdata_req *)mp->b_rptr)->OPT_length != 0) { attrs.udpattr_ipp6 = ipp; attrs.udpattr_mb = mp; if (udp_unitdata_opt_process(q, mp, error, &attrs) < 0) { goto done; } ASSERT(*error == 0); opt_present = B_TRUE; } } rw_enter(&udp->udp_rwlock, RW_READER); ignore = ipp->ipp_sticky_ignored; /* mp1 points to the M_DATA mblk carrying the packet */ ASSERT(mp1 != NULL && DB_TYPE(mp1) == M_DATA); if (sin6->sin6_scope_id != 0 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { /* * IPPF_SCOPE_ID is special. It's neither a sticky * option nor ancillary data. It needs to be * explicitly set in options_exists. */ option_exists |= IPPF_SCOPE_ID; } /* * Compute the destination address */ ip6_dst = sin6->sin6_addr; if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) ip6_dst = ipv6_loopback; /* * If we're not going to the same destination as last time, then * recompute the label required. This is done in a separate routine to * avoid blowing up our stack here. * * TSOL Note: Since we are not in WRITER mode, UDP packets * to different destination may require different labels, * or worse, UDP packets to same IP address may require * different labels due to use of shared all-zones address. * We use conn_lock to ensure that lastdst, sticky ipp_hopopts, * and sticky ipp_hopoptslen are consistent for the current * destination and are updated atomically. */ mutex_enter(&connp->conn_lock); if (is_system_labeled()) { /* Using UDP MLP requires SCM_UCRED from user */ if (connp->conn_mlp_type != mlptSingle && !attrs.udpattr_credset) { DTRACE_PROBE4( tx__ip__log__info__output__udp6, char *, "MLP mp(1) lacks SCM_UCRED attr(2) on q(3)", mblk_t *, mp1, udpattrs_t *, &attrs, queue_t *, q); *error = ECONNREFUSED; rw_exit(&udp->udp_rwlock); mutex_exit(&connp->conn_lock); goto done; } /* * update label option for this UDP socket if * - the destination has changed, or * - the UDP socket is MLP */ if ((opt_present || !IN6_ARE_ADDR_EQUAL(&udp->udp_v6lastdst, &ip6_dst) || connp->conn_mlp_type != mlptSingle) && (*error = udp_update_label_v6(q, mp, &ip6_dst)) != 0) { rw_exit(&udp->udp_rwlock); mutex_exit(&connp->conn_lock); goto done; } } /* * If there's a security label here, then we ignore any options the * user may try to set. We keep the peer's label as a hidden sticky * option. We make a private copy of this label before releasing the * lock so that label is kept consistent with the destination addr. */ if (udp->udp_label_len_v6 > 0) { ignore &= ~IPPF_HOPOPTS; ipp->ipp_fields &= ~IPPF_HOPOPTS; } if ((udp->udp_sticky_ipp.ipp_fields == 0) && (ipp->ipp_fields == 0)) { /* No sticky options nor ancillary data. */ mutex_exit(&connp->conn_lock); goto no_options; } /* * Go through the options figuring out where each is going to * come from and build two masks. The first mask indicates if * the option exists at all. The second mask indicates if the * option is sticky or ancillary. */ if (!(ignore & IPPF_HOPOPTS)) { if (ipp->ipp_fields & IPPF_HOPOPTS) { option_exists |= IPPF_HOPOPTS; udp_ip_hdr_len += ipp->ipp_hopoptslen; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_HOPOPTS) { option_exists |= IPPF_HOPOPTS; is_sticky |= IPPF_HOPOPTS; ASSERT(udp->udp_sticky_ipp.ipp_hopoptslen != 0); hopoptsptr = kmem_alloc( udp->udp_sticky_ipp.ipp_hopoptslen, KM_NOSLEEP); if (hopoptsptr == NULL) { *error = ENOMEM; mutex_exit(&connp->conn_lock); goto done; } hopoptslen = udp->udp_sticky_ipp.ipp_hopoptslen; bcopy(udp->udp_sticky_ipp.ipp_hopopts, hopoptsptr, hopoptslen); udp_ip_hdr_len += hopoptslen; } } mutex_exit(&connp->conn_lock); if (!(ignore & IPPF_RTHDR)) { if (ipp->ipp_fields & IPPF_RTHDR) { option_exists |= IPPF_RTHDR; udp_ip_hdr_len += ipp->ipp_rthdrlen; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_RTHDR) { option_exists |= IPPF_RTHDR; is_sticky |= IPPF_RTHDR; udp_ip_hdr_len += udp->udp_sticky_ipp.ipp_rthdrlen; } } if (!(ignore & IPPF_RTDSTOPTS) && (option_exists & IPPF_RTHDR)) { if (ipp->ipp_fields & IPPF_RTDSTOPTS) { option_exists |= IPPF_RTDSTOPTS; udp_ip_hdr_len += ipp->ipp_rtdstoptslen; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_RTDSTOPTS) { option_exists |= IPPF_RTDSTOPTS; is_sticky |= IPPF_RTDSTOPTS; udp_ip_hdr_len += udp->udp_sticky_ipp.ipp_rtdstoptslen; } } if (!(ignore & IPPF_DSTOPTS)) { if (ipp->ipp_fields & IPPF_DSTOPTS) { option_exists |= IPPF_DSTOPTS; udp_ip_hdr_len += ipp->ipp_dstoptslen; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_DSTOPTS) { option_exists |= IPPF_DSTOPTS; is_sticky |= IPPF_DSTOPTS; udp_ip_hdr_len += udp->udp_sticky_ipp.ipp_dstoptslen; } } if (!(ignore & IPPF_IFINDEX)) { if (ipp->ipp_fields & IPPF_IFINDEX) { option_exists |= IPPF_IFINDEX; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_IFINDEX) { option_exists |= IPPF_IFINDEX; is_sticky |= IPPF_IFINDEX; } } if (!(ignore & IPPF_ADDR)) { if (ipp->ipp_fields & IPPF_ADDR) { option_exists |= IPPF_ADDR; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_ADDR) { option_exists |= IPPF_ADDR; is_sticky |= IPPF_ADDR; } } if (!(ignore & IPPF_DONTFRAG)) { if (ipp->ipp_fields & IPPF_DONTFRAG) { option_exists |= IPPF_DONTFRAG; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_DONTFRAG) { option_exists |= IPPF_DONTFRAG; is_sticky |= IPPF_DONTFRAG; } } if (!(ignore & IPPF_USE_MIN_MTU)) { if (ipp->ipp_fields & IPPF_USE_MIN_MTU) { option_exists |= IPPF_USE_MIN_MTU; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_USE_MIN_MTU) { option_exists |= IPPF_USE_MIN_MTU; is_sticky |= IPPF_USE_MIN_MTU; } } if (!(ignore & IPPF_HOPLIMIT) && (ipp->ipp_fields & IPPF_HOPLIMIT)) option_exists |= IPPF_HOPLIMIT; /* IPV6_HOPLIMIT can never be sticky */ ASSERT(!(udp->udp_sticky_ipp.ipp_fields & IPPF_HOPLIMIT)); if (!(ignore & IPPF_UNICAST_HOPS) && (udp->udp_sticky_ipp.ipp_fields & IPPF_UNICAST_HOPS)) { option_exists |= IPPF_UNICAST_HOPS; is_sticky |= IPPF_UNICAST_HOPS; } if (!(ignore & IPPF_MULTICAST_HOPS) && (udp->udp_sticky_ipp.ipp_fields & IPPF_MULTICAST_HOPS)) { option_exists |= IPPF_MULTICAST_HOPS; is_sticky |= IPPF_MULTICAST_HOPS; } if (!(ignore & IPPF_TCLASS)) { if (ipp->ipp_fields & IPPF_TCLASS) { option_exists |= IPPF_TCLASS; } else if (udp->udp_sticky_ipp.ipp_fields & IPPF_TCLASS) { option_exists |= IPPF_TCLASS; is_sticky |= IPPF_TCLASS; } } if (!(ignore & IPPF_NEXTHOP) && (udp->udp_sticky_ipp.ipp_fields & IPPF_NEXTHOP)) { option_exists |= IPPF_NEXTHOP; is_sticky |= IPPF_NEXTHOP; } no_options: /* * If any options carried in the ip6i_t were specified, we * need to account for the ip6i_t in the data we'll be sending * down. */ if (option_exists & IPPF_HAS_IP6I) udp_ip_hdr_len += sizeof (ip6i_t); /* check/fix buffer config, setup pointers into it */ ip6h = (ip6_t *)&mp1->b_rptr[-udp_ip_hdr_len]; if (DB_REF(mp1) != 1 || ((unsigned char *)ip6h < DB_BASE(mp1)) || !OK_32PTR(ip6h)) { /* Try to get everything in a single mblk next time */ if (udp_ip_hdr_len > udp->udp_max_hdr_len) { udp->udp_max_hdr_len = udp_ip_hdr_len; sth_wroff = udp->udp_max_hdr_len + us->us_wroff_extra; } mp2 = allocb(udp_ip_hdr_len + us->us_wroff_extra, BPRI_LO); if (mp2 == NULL) { *error = ENOMEM; rw_exit(&udp->udp_rwlock); goto done; } mp2->b_wptr = DB_LIM(mp2); mp2->b_cont = mp1; mp1 = mp2; if (DB_TYPE(mp) != M_DATA) mp->b_cont = mp1; else mp = mp1; ip6h = (ip6_t *)(mp1->b_wptr - udp_ip_hdr_len); } mp1->b_rptr = (unsigned char *)ip6h; ip6i = (ip6i_t *)ip6h; #define ANCIL_OR_STICKY_PTR(f) ((is_sticky & f) ? &udp->udp_sticky_ipp : ipp) if (option_exists & IPPF_HAS_IP6I) { ip6h = (ip6_t *)&ip6i[1]; ip6i->ip6i_flags = 0; ip6i->ip6i_vcf = IPV6_DEFAULT_VERS_AND_FLOW; /* sin6_scope_id takes precendence over IPPF_IFINDEX */ if (option_exists & IPPF_SCOPE_ID) { ip6i->ip6i_flags |= IP6I_IFINDEX; ip6i->ip6i_ifindex = sin6->sin6_scope_id; } else if (option_exists & IPPF_IFINDEX) { tipp = ANCIL_OR_STICKY_PTR(IPPF_IFINDEX); ASSERT(tipp->ipp_ifindex != 0); ip6i->ip6i_flags |= IP6I_IFINDEX; ip6i->ip6i_ifindex = tipp->ipp_ifindex; } if (option_exists & IPPF_ADDR) { /* * Enable per-packet source address verification if * IPV6_PKTINFO specified the source address. * ip6_src is set in the transport's _wput function. */ ip6i->ip6i_flags |= IP6I_VERIFY_SRC; } if (option_exists & IPPF_DONTFRAG) { ip6i->ip6i_flags |= IP6I_DONTFRAG; } if (option_exists & IPPF_USE_MIN_MTU) { ip6i->ip6i_flags = IP6I_API_USE_MIN_MTU( ip6i->ip6i_flags, ipp->ipp_use_min_mtu); } if (option_exists & IPPF_NEXTHOP) { tipp = ANCIL_OR_STICKY_PTR(IPPF_NEXTHOP); ASSERT(!IN6_IS_ADDR_UNSPECIFIED(&tipp->ipp_nexthop)); ip6i->ip6i_flags |= IP6I_NEXTHOP; ip6i->ip6i_nexthop = tipp->ipp_nexthop; } /* * tell IP this is an ip6i_t private header */ ip6i->ip6i_nxt = IPPROTO_RAW; } /* Initialize IPv6 header */ ip6h->ip6_vcf = IPV6_DEFAULT_VERS_AND_FLOW; bzero(&ip6h->ip6_src, sizeof (ip6h->ip6_src)); /* Set the hoplimit of the outgoing packet. */ if (option_exists & IPPF_HOPLIMIT) { /* IPV6_HOPLIMIT ancillary data overrides all other settings. */ ip6h->ip6_hops = ipp->ipp_hoplimit; ip6i->ip6i_flags |= IP6I_HOPLIMIT; } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { ip6h->ip6_hops = udp->udp_multicast_ttl; if (option_exists & IPPF_MULTICAST_HOPS) ip6i->ip6i_flags |= IP6I_HOPLIMIT; } else { ip6h->ip6_hops = udp->udp_ttl; if (option_exists & IPPF_UNICAST_HOPS) ip6i->ip6i_flags |= IP6I_HOPLIMIT; } if (option_exists & IPPF_ADDR) { tipp = ANCIL_OR_STICKY_PTR(IPPF_ADDR); ASSERT(!IN6_IS_ADDR_UNSPECIFIED(&tipp->ipp_addr)); ip6h->ip6_src = tipp->ipp_addr; } else { /* * The source address was not set using IPV6_PKTINFO. * First look at the bound source. * If unspecified fallback to __sin6_src_id. */ ip6h->ip6_src = udp->udp_v6src; if (sin6->__sin6_src_id != 0 && IN6_IS_ADDR_UNSPECIFIED(&ip6h->ip6_src)) { ip_srcid_find_id(sin6->__sin6_src_id, &ip6h->ip6_src, connp->conn_zoneid, us->us_netstack); } } nxthdr_ptr = (uint8_t *)&ip6h->ip6_nxt; cp = (uint8_t *)&ip6h[1]; /* * Here's where we have to start stringing together * any extension headers in the right order: * Hop-by-hop, destination, routing, and final destination opts. */ if (option_exists & IPPF_HOPOPTS) { /* Hop-by-hop options */ ip6_hbh_t *hbh = (ip6_hbh_t *)cp; tipp = ANCIL_OR_STICKY_PTR(IPPF_HOPOPTS); if (hopoptslen == 0) { hopoptsptr = tipp->ipp_hopopts; hopoptslen = tipp->ipp_hopoptslen; is_ancillary = B_TRUE; } *nxthdr_ptr = IPPROTO_HOPOPTS; nxthdr_ptr = &hbh->ip6h_nxt; bcopy(hopoptsptr, cp, hopoptslen); cp += hopoptslen; if (hopoptsptr != NULL && !is_ancillary) { kmem_free(hopoptsptr, hopoptslen); hopoptsptr = NULL; hopoptslen = 0; } } /* * En-route destination options * Only do them if there's a routing header as well */ if (option_exists & IPPF_RTDSTOPTS) { ip6_dest_t *dst = (ip6_dest_t *)cp; tipp = ANCIL_OR_STICKY_PTR(IPPF_RTDSTOPTS); *nxthdr_ptr = IPPROTO_DSTOPTS; nxthdr_ptr = &dst->ip6d_nxt; bcopy(tipp->ipp_rtdstopts, cp, tipp->ipp_rtdstoptslen); cp += tipp->ipp_rtdstoptslen; } /* * Routing header next */ if (option_exists & IPPF_RTHDR) { ip6_rthdr_t *rt = (ip6_rthdr_t *)cp; tipp = ANCIL_OR_STICKY_PTR(IPPF_RTHDR); *nxthdr_ptr = IPPROTO_ROUTING; nxthdr_ptr = &rt->ip6r_nxt; bcopy(tipp->ipp_rthdr, cp, tipp->ipp_rthdrlen); cp += tipp->ipp_rthdrlen; } /* * Do ultimate destination options */ if (option_exists & IPPF_DSTOPTS) { ip6_dest_t *dest = (ip6_dest_t *)cp; tipp = ANCIL_OR_STICKY_PTR(IPPF_DSTOPTS); *nxthdr_ptr = IPPROTO_DSTOPTS; nxthdr_ptr = &dest->ip6d_nxt; bcopy(tipp->ipp_dstopts, cp, tipp->ipp_dstoptslen); cp += tipp->ipp_dstoptslen; } /* * Now set the last header pointer to the proto passed in */ ASSERT((int)(cp - (uint8_t *)ip6i) == (udp_ip_hdr_len - UDPH_SIZE)); *nxthdr_ptr = IPPROTO_UDP; /* Update UDP header */ udph = (udpha_t *)((uchar_t *)ip6i + udp_ip_hdr_len - UDPH_SIZE); udph->uha_dst_port = sin6->sin6_port; udph->uha_src_port = udp->udp_port; /* * Copy in the destination address */ ip6h->ip6_dst = ip6_dst; ip6h->ip6_vcf = (IPV6_DEFAULT_VERS_AND_FLOW & IPV6_VERS_AND_FLOW_MASK) | (sin6->sin6_flowinfo & ~IPV6_VERS_AND_FLOW_MASK); if (option_exists & IPPF_TCLASS) { tipp = ANCIL_OR_STICKY_PTR(IPPF_TCLASS); ip6h->ip6_vcf = IPV6_TCLASS_FLOW(ip6h->ip6_vcf, tipp->ipp_tclass); } rw_exit(&udp->udp_rwlock); if (option_exists & IPPF_RTHDR) { ip6_rthdr_t *rth; /* * Perform any processing needed for source routing. * We know that all extension headers will be in the same mblk * as the IPv6 header. */ rth = ip_find_rthdr_v6(ip6h, mp1->b_wptr); if (rth != NULL && rth->ip6r_segleft != 0) { if (rth->ip6r_type != IPV6_RTHDR_TYPE_0) { /* * Drop packet - only support Type 0 routing. * Notify the application as well. */ *error = EPROTO; goto done; } /* * rth->ip6r_len is twice the number of * addresses in the header. Thus it must be even. */ if (rth->ip6r_len & 0x1) { *error = EPROTO; goto done; } /* * Shuffle the routing header and ip6_dst * addresses, and get the checksum difference * between the first hop (in ip6_dst) and * the destination (in the last routing hdr entry). */ csum = ip_massage_options_v6(ip6h, rth, us->us_netstack); /* * Verify that the first hop isn't a mapped address. * Routers along the path need to do this verification * for subsequent hops. */ if (IN6_IS_ADDR_V4MAPPED(&ip6h->ip6_dst)) { *error = EADDRNOTAVAIL; goto done; } cp += (rth->ip6r_len + 1)*8; } } /* count up length of UDP packet */ ip_len = (mp1->b_wptr - (unsigned char *)ip6h) - IPV6_HDR_LEN; if ((mp2 = mp1->b_cont) != NULL) { do { ASSERT((uintptr_t)MBLKL(mp2) <= (uintptr_t)UINT_MAX); ip_len += (uint32_t)MBLKL(mp2); } while ((mp2 = mp2->b_cont) != NULL); } /* * If the size of the packet is greater than the maximum allowed by * ip, return an error. Passing this down could cause panics because * the size will have wrapped and be inconsistent with the msg size. */ if (ip_len > IP_MAXPACKET) { *error = EMSGSIZE; goto done; } /* Store the UDP length. Subtract length of extension hdrs */ udph->uha_length = htons(ip_len + IPV6_HDR_LEN - (int)((uchar_t *)udph - (uchar_t *)ip6h)); /* * We make it easy for IP to include our pseudo header * by putting our length in uh_checksum, modified (if * we have a routing header) by the checksum difference * between the ultimate destination and first hop addresses. * Note: UDP over IPv6 must always checksum the packet. */ csum += udph->uha_length; csum = (csum & 0xFFFF) + (csum >> 16); udph->uha_checksum = (uint16_t)csum; #ifdef _LITTLE_ENDIAN ip_len = htons(ip_len); #endif ip6h->ip6_plen = ip_len; if (DB_CRED(mp) != NULL) mblk_setcred(mp1, DB_CRED(mp)); if (DB_TYPE(mp) != M_DATA) { ASSERT(mp != mp1); freeb(mp); } /* mp has been consumed and we'll return success */ ASSERT(*error == 0); mp = NULL; /* We're done. Pass the packet to IP */ BUMP_MIB(&us->us_udp_mib, udpHCOutDatagrams); ip_output_v6(connp, mp1, q, IP_WPUT); done: if (sth_wroff != 0) { (void) mi_set_sth_wroff(RD(q), udp->udp_max_hdr_len + us->us_wroff_extra); } if (hopoptsptr != NULL && !is_ancillary) { kmem_free(hopoptsptr, hopoptslen); hopoptsptr = NULL; } if (*error != 0) { ASSERT(mp != NULL); BUMP_MIB(&us->us_udp_mib, udpOutErrors); } return (mp); } static int udp_getpeername(udp_t *udp, struct sockaddr *sa, uint_t *salenp) { sin_t *sin = (sin_t *)sa; sin6_t *sin6 = (sin6_t *)sa; ASSERT(RW_LOCK_HELD(&udp->udp_rwlock)); if (udp->udp_state != TS_DATA_XFER) return (ENOTCONN); switch (udp->udp_family) { case AF_INET: ASSERT(udp->udp_ipversion == IPV4_VERSION); if (*salenp < sizeof (sin_t)) return (EINVAL); *salenp = sizeof (sin_t); *sin = sin_null; sin->sin_family = AF_INET; sin->sin_port = udp->udp_dstport; sin->sin_addr.s_addr = V4_PART_OF_V6(udp->udp_v6dst); break; case AF_INET6: if (*salenp < sizeof (sin6_t)) return (EINVAL); *salenp = sizeof (sin6_t); *sin6 = sin6_null; sin6->sin6_family = AF_INET6; sin6->sin6_port = udp->udp_dstport; sin6->sin6_addr = udp->udp_v6dst; sin6->sin6_flowinfo = udp->udp_flowinfo; break; } return (0); } static int udp_getmyname(udp_t *udp, struct sockaddr *sa, uint_t *salenp) { sin_t *sin = (sin_t *)sa; sin6_t *sin6 = (sin6_t *)sa; ASSERT(RW_LOCK_HELD(&udp->udp_rwlock)); switch (udp->udp_family) { case AF_INET: ASSERT(udp->udp_ipversion == IPV4_VERSION); if (*salenp < sizeof (sin_t)) return (EINVAL); *salenp = sizeof (sin_t); *sin = sin_null; sin->sin_family = AF_INET; sin->sin_port = udp->udp_port; /* * If udp_v6src is unspecified, we might be bound to broadcast * / multicast. Use udp_bound_v6src as local address instead * (that could also still be unspecified). */ if (!IN6_IS_ADDR_V4MAPPED_ANY(&udp->udp_v6src) && !IN6_IS_ADDR_UNSPECIFIED(&udp->udp_v6src)) { sin->sin_addr.s_addr = V4_PART_OF_V6(udp->udp_v6src); } else { sin->sin_addr.s_addr = V4_PART_OF_V6(udp->udp_bound_v6src); } break; case AF_INET6: if (*salenp < sizeof (sin6_t)) return (EINVAL); *salenp = sizeof (sin6_t); *sin6 = sin6_null; sin6->sin6_family = AF_INET6; sin6->sin6_port = udp->udp_port; sin6->sin6_flowinfo = udp->udp_flowinfo; /* * If udp_v6src is unspecified, we might be bound to broadcast * / multicast. Use udp_bound_v6src as local address instead * (that could also still be unspecified). */ if (!IN6_IS_ADDR_UNSPECIFIED(&udp->udp_v6src)) sin6->sin6_addr = udp->udp_v6src; else sin6->sin6_addr = udp->udp_bound_v6src; break; } return (0); } /* * Handle special out-of-band ioctl requests (see PSARC/2008/265). */ static void udp_wput_cmdblk(queue_t *q, mblk_t *mp) { void *data; mblk_t *datamp = mp->b_cont; udp_t *udp = Q_TO_UDP(q); cmdblk_t *cmdp = (cmdblk_t *)mp->b_rptr; if (datamp == NULL || MBLKL(datamp) < cmdp->cb_len) { cmdp->cb_error = EPROTO; qreply(q, mp); return; } data = datamp->b_rptr; rw_enter(&udp->udp_rwlock, RW_READER); switch (cmdp->cb_cmd) { case TI_GETPEERNAME: cmdp->cb_error = udp_getpeername(udp, data, &cmdp->cb_len); break; case TI_GETMYNAME: cmdp->cb_error = udp_getmyname(udp, data, &cmdp->cb_len); break; default: cmdp->cb_error = EINVAL; break; } rw_exit(&udp->udp_rwlock); qreply(q, mp); } static void udp_wput_other(queue_t *q, mblk_t *mp) { uchar_t *rptr = mp->b_rptr; struct datab *db; struct iocblk *iocp; cred_t *cr; conn_t *connp = Q_TO_CONN(q); udp_t *udp = connp->conn_udp; udp_stack_t *us; TRACE_1(TR_FAC_UDP, TR_UDP_WPUT_OTHER_START, "udp_wput_other_start: q %p", q); us = udp->udp_us; db = mp->b_datap; cr = DB_CREDDEF(mp, connp->conn_cred); switch (db->db_type) { case M_CMD: udp_wput_cmdblk(q, mp); return; case M_PROTO: case M_PCPROTO: if (mp->b_wptr - rptr < sizeof (t_scalar_t)) { freemsg(mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "protoshort"); return; } switch (((t_primp_t)rptr)->type) { case T_ADDR_REQ: udp_addr_req(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "addrreq"); return; case O_T_BIND_REQ: case T_BIND_REQ: udp_bind(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "bindreq"); return; case T_CONN_REQ: udp_connect(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "connreq"); return; case T_CAPABILITY_REQ: udp_capability_req(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "capabreq"); return; case T_INFO_REQ: udp_info_req(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "inforeq"); return; case T_UNITDATA_REQ: /* * If a T_UNITDATA_REQ gets here, the address must * be bad. Valid T_UNITDATA_REQs are handled * in udp_wput. */ udp_ud_err(q, mp, NULL, 0, EADDRNOTAVAIL); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "unitdatareq"); return; case T_UNBIND_REQ: udp_unbind(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "unbindreq"); return; case T_SVR4_OPTMGMT_REQ: if (!snmpcom_req(q, mp, udp_snmp_set, ip_snmp_get, cr)) { (void) svr4_optcom_req(q, mp, cr, &udp_opt_obj, B_TRUE); } TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "optmgmtreq"); return; case T_OPTMGMT_REQ: (void) tpi_optcom_req(q, mp, cr, &udp_opt_obj, B_TRUE); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "optmgmtreq"); return; case T_DISCON_REQ: udp_disconnect(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "disconreq"); return; /* The following TPI message is not supported by udp. */ case O_T_CONN_RES: case T_CONN_RES: udp_err_ack(q, mp, TNOTSUPPORT, 0); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "connres/disconreq"); return; /* The following 3 TPI messages are illegal for udp. */ case T_DATA_REQ: case T_EXDATA_REQ: case T_ORDREL_REQ: udp_err_ack(q, mp, TNOTSUPPORT, 0); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "data/exdata/ordrel"); return; default: break; } break; case M_FLUSH: if (*rptr & FLUSHW) flushq(q, FLUSHDATA); break; case M_IOCTL: iocp = (struct iocblk *)mp->b_rptr; switch (iocp->ioc_cmd) { case TI_GETPEERNAME: if (udp->udp_state != TS_DATA_XFER) { /* * If a default destination address has not * been associated with the stream, then we * don't know the peer's name. */ iocp->ioc_error = ENOTCONN; iocp->ioc_count = 0; mp->b_datap->db_type = M_IOCACK; qreply(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "getpeername"); return; } /* FALLTHRU */ case TI_GETMYNAME: { /* * For TI_GETPEERNAME and TI_GETMYNAME, we first * need to copyin the user's strbuf structure. * Processing will continue in the M_IOCDATA case * below. */ mi_copyin(q, mp, NULL, SIZEOF_STRUCT(strbuf, iocp->ioc_flag)); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "getmyname"); return; } case ND_SET: /* nd_getset performs the necessary checking */ case ND_GET: if (nd_getset(q, us->us_nd, mp)) { qreply(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "get"); return; } break; case _SIOCSOCKFALLBACK: /* * Either sockmod is about to be popped and the * socket would now be treated as a plain stream, * or a module is about to be pushed so we could * no longer use read-side synchronous stream. * Drain any queued data and disable direct sockfs * interface from now on. */ if (!udp->udp_issocket) { DB_TYPE(mp) = M_IOCNAK; iocp->ioc_error = EINVAL; } else { udp->udp_issocket = B_FALSE; if (udp->udp_direct_sockfs) { /* * Disable read-side synchronous * stream interface and drain any * queued data. */ udp_rcv_drain(RD(q), udp, B_FALSE); ASSERT(!udp->udp_direct_sockfs); UDP_STAT(us, udp_sock_fallback); } DB_TYPE(mp) = M_IOCACK; iocp->ioc_error = 0; } iocp->ioc_count = 0; iocp->ioc_rval = 0; qreply(q, mp); return; default: break; } break; case M_IOCDATA: udp_wput_iocdata(q, mp); TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "iocdata"); return; default: /* Unrecognized messages are passed through without change. */ break; } TRACE_2(TR_FAC_UDP, TR_UDP_WPUT_OTHER_END, "udp_wput_other_end: q %p (%S)", q, "end"); ip_output(connp, mp, q, IP_WPUT); } /* * udp_wput_iocdata is called by udp_wput_other to handle all M_IOCDATA * messages. */ static void udp_wput_iocdata(queue_t *q, mblk_t *mp) { mblk_t *mp1; struct iocblk *iocp = (struct iocblk *)mp->b_rptr; STRUCT_HANDLE(strbuf, sb); udp_t *udp = Q_TO_UDP(q); int error; uint_t addrlen; /* Make sure it is one of ours. */ switch (iocp->ioc_cmd) { case TI_GETMYNAME: case TI_GETPEERNAME: break; default: ip_output(udp->udp_connp, mp, q, IP_WPUT); return; } switch (mi_copy_state(q, mp, &mp1)) { case -1: return; case MI_COPY_CASE(MI_COPY_IN, 1): break; case MI_COPY_CASE(MI_COPY_OUT, 1): /* * The address has been copied out, so now * copyout the strbuf. */ mi_copyout(q, mp); return; case MI_COPY_CASE(MI_COPY_OUT, 2): /* * The address and strbuf have been copied out. * We're done, so just acknowledge the original * M_IOCTL. */ mi_copy_done(q, mp, 0); return; default: /* * Something strange has happened, so acknowledge * the original M_IOCTL with an EPROTO error. */ mi_copy_done(q, mp, EPROTO); return; } /* * Now we have the strbuf structure for TI_GETMYNAME * and TI_GETPEERNAME. Next we copyout the requested * address and then we'll copyout the strbuf. */ STRUCT_SET_HANDLE(sb, iocp->ioc_flag, (void *)mp1->b_rptr); addrlen = udp->udp_family == AF_INET ? sizeof (sin_t) : sizeof (sin6_t); if (STRUCT_FGET(sb, maxlen) < addrlen) { mi_copy_done(q, mp, EINVAL); return; } mp1 = mi_copyout_alloc(q, mp, STRUCT_FGETP(sb, buf), addrlen, B_TRUE); if (mp1 == NULL) return; rw_enter(&udp->udp_rwlock, RW_READER); switch (iocp->ioc_cmd) { case TI_GETMYNAME: error = udp_getmyname(udp, (void *)mp1->b_rptr, &addrlen); break; case TI_GETPEERNAME: error = udp_getpeername(udp, (void *)mp1->b_rptr, &addrlen); break; } rw_exit(&udp->udp_rwlock); if (error != 0) { mi_copy_done(q, mp, error); } else { mp1->b_wptr += addrlen; STRUCT_FSET(sb, len, addrlen); /* Copy out the address */ mi_copyout(q, mp); } } static int udp_unitdata_opt_process(queue_t *q, mblk_t *mp, int *errorp, udpattrs_t *udpattrs) { struct T_unitdata_req *udreqp; int is_absreq_failure; cred_t *cr; conn_t *connp = Q_TO_CONN(q); ASSERT(((t_primp_t)mp->b_rptr)->type); cr = DB_CREDDEF(mp, connp->conn_cred); udreqp = (struct T_unitdata_req *)mp->b_rptr; *errorp = tpi_optcom_buf(q, mp, &udreqp->OPT_length, udreqp->OPT_offset, cr, &udp_opt_obj, udpattrs, &is_absreq_failure); if (*errorp != 0) { /* * Note: No special action needed in this * module for "is_absreq_failure" */ return (-1); /* failure */ } ASSERT(is_absreq_failure == 0); return (0); /* success */ } void udp_ddi_init(void) { udp_max_optsize = optcom_max_optsize(udp_opt_obj.odb_opt_des_arr, udp_opt_obj.odb_opt_arr_cnt); /* * 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_UDP, udp_stack_init, NULL, udp_stack_fini); } void udp_ddi_destroy(void) { netstack_unregister(NS_UDP); } /* * Initialize the UDP stack instance. */ static void * udp_stack_init(netstackid_t stackid, netstack_t *ns) { udp_stack_t *us; udpparam_t *pa; int i; us = (udp_stack_t *)kmem_zalloc(sizeof (*us), KM_SLEEP); us->us_netstack = ns; us->us_num_epriv_ports = UDP_NUM_EPRIV_PORTS; us->us_epriv_ports[0] = 2049; us->us_epriv_ports[1] = 4045; /* * The smallest anonymous port in the priviledged port range which UDP * looks for free port. Use in the option UDP_ANONPRIVBIND. */ us->us_min_anonpriv_port = 512; us->us_bind_fanout_size = udp_bind_fanout_size; /* Roundup variable that might have been modified in /etc/system */ if (us->us_bind_fanout_size & (us->us_bind_fanout_size - 1)) { /* Not a power of two. Round up to nearest power of two */ for (i = 0; i < 31; i++) { if (us->us_bind_fanout_size < (1 << i)) break; } us->us_bind_fanout_size = 1 << i; } us->us_bind_fanout = kmem_zalloc(us->us_bind_fanout_size * sizeof (udp_fanout_t), KM_SLEEP); for (i = 0; i < us->us_bind_fanout_size; i++) { mutex_init(&us->us_bind_fanout[i].uf_lock, NULL, MUTEX_DEFAULT, NULL); } pa = (udpparam_t *)kmem_alloc(sizeof (udp_param_arr), KM_SLEEP); us->us_param_arr = pa; bcopy(udp_param_arr, us->us_param_arr, sizeof (udp_param_arr)); (void) udp_param_register(&us->us_nd, us->us_param_arr, A_CNT(udp_param_arr)); us->us_kstat = udp_kstat2_init(stackid, &us->us_statistics); us->us_mibkp = udp_kstat_init(stackid); return (us); } /* * Free the UDP stack instance. */ static void udp_stack_fini(netstackid_t stackid, void *arg) { udp_stack_t *us = (udp_stack_t *)arg; int i; for (i = 0; i < us->us_bind_fanout_size; i++) { mutex_destroy(&us->us_bind_fanout[i].uf_lock); } kmem_free(us->us_bind_fanout, us->us_bind_fanout_size * sizeof (udp_fanout_t)); us->us_bind_fanout = NULL; nd_free(&us->us_nd); kmem_free(us->us_param_arr, sizeof (udp_param_arr)); us->us_param_arr = NULL; udp_kstat_fini(stackid, us->us_mibkp); us->us_mibkp = NULL; udp_kstat2_fini(stackid, us->us_kstat); us->us_kstat = NULL; bzero(&us->us_statistics, sizeof (us->us_statistics)); kmem_free(us, sizeof (*us)); } static void * udp_kstat2_init(netstackid_t stackid, udp_stat_t *us_statisticsp) { kstat_t *ksp; udp_stat_t template = { { "udp_ip_send", KSTAT_DATA_UINT64 }, { "udp_ip_ire_send", KSTAT_DATA_UINT64 }, { "udp_ire_null", KSTAT_DATA_UINT64 }, { "udp_drain", KSTAT_DATA_UINT64 }, { "udp_sock_fallback", KSTAT_DATA_UINT64 }, { "udp_rrw_busy", KSTAT_DATA_UINT64 }, { "udp_rrw_msgcnt", KSTAT_DATA_UINT64 }, { "udp_out_sw_cksum", KSTAT_DATA_UINT64 }, { "udp_out_sw_cksum_bytes", KSTAT_DATA_UINT64 }, { "udp_out_opt", KSTAT_DATA_UINT64 }, { "udp_out_err_notconn", KSTAT_DATA_UINT64 }, { "udp_out_err_output", KSTAT_DATA_UINT64 }, { "udp_out_err_tudr", KSTAT_DATA_UINT64 }, { "udp_in_pktinfo", KSTAT_DATA_UINT64 }, { "udp_in_recvdstaddr", KSTAT_DATA_UINT64 }, { "udp_in_recvopts", KSTAT_DATA_UINT64 }, { "udp_in_recvif", KSTAT_DATA_UINT64 }, { "udp_in_recvslla", KSTAT_DATA_UINT64 }, { "udp_in_recvucred", KSTAT_DATA_UINT64 }, { "udp_in_recvttl", KSTAT_DATA_UINT64 }, { "udp_in_recvhopopts", KSTAT_DATA_UINT64 }, { "udp_in_recvhoplimit", KSTAT_DATA_UINT64 }, { "udp_in_recvdstopts", KSTAT_DATA_UINT64 }, { "udp_in_recvrtdstopts", KSTAT_DATA_UINT64 }, { "udp_in_recvrthdr", KSTAT_DATA_UINT64 }, { "udp_in_recvpktinfo", KSTAT_DATA_UINT64 }, { "udp_in_recvtclass", KSTAT_DATA_UINT64 }, { "udp_in_timestamp", KSTAT_DATA_UINT64 }, #ifdef DEBUG { "udp_data_conn", KSTAT_DATA_UINT64 }, { "udp_data_notconn", KSTAT_DATA_UINT64 }, #endif }; ksp = kstat_create_netstack(UDP_MOD_NAME, 0, "udpstat", "net", KSTAT_TYPE_NAMED, sizeof (template) / sizeof (kstat_named_t), KSTAT_FLAG_VIRTUAL, stackid); if (ksp == NULL) return (NULL); bcopy(&template, us_statisticsp, sizeof (template)); ksp->ks_data = (void *)us_statisticsp; ksp->ks_private = (void *)(uintptr_t)stackid; kstat_install(ksp); return (ksp); } static void udp_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 * udp_kstat_init(netstackid_t stackid) { kstat_t *ksp; udp_named_kstat_t template = { { "inDatagrams", KSTAT_DATA_UINT64, 0 }, { "inErrors", KSTAT_DATA_UINT32, 0 }, { "outDatagrams", KSTAT_DATA_UINT64, 0 }, { "entrySize", KSTAT_DATA_INT32, 0 }, { "entry6Size", KSTAT_DATA_INT32, 0 }, { "outErrors", KSTAT_DATA_UINT32, 0 }, }; ksp = kstat_create_netstack(UDP_MOD_NAME, 0, UDP_MOD_NAME, "mib2", KSTAT_TYPE_NAMED, NUM_OF_FIELDS(udp_named_kstat_t), 0, stackid); if (ksp == NULL || ksp->ks_data == NULL) return (NULL); template.entrySize.value.ui32 = sizeof (mib2_udpEntry_t); template.entry6Size.value.ui32 = sizeof (mib2_udp6Entry_t); bcopy(&template, ksp->ks_data, sizeof (template)); ksp->ks_update = udp_kstat_update; ksp->ks_private = (void *)(uintptr_t)stackid; kstat_install(ksp); return (ksp); } static void udp_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 udp_kstat_update(kstat_t *kp, int rw) { udp_named_kstat_t *udpkp; netstackid_t stackid = (netstackid_t)(uintptr_t)kp->ks_private; netstack_t *ns; udp_stack_t *us; 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); us = ns->netstack_udp; if (us == NULL) { netstack_rele(ns); return (-1); } udpkp = (udp_named_kstat_t *)kp->ks_data; udpkp->inDatagrams.value.ui64 = us->us_udp_mib.udpHCInDatagrams; udpkp->inErrors.value.ui32 = us->us_udp_mib.udpInErrors; udpkp->outDatagrams.value.ui64 = us->us_udp_mib.udpHCOutDatagrams; udpkp->outErrors.value.ui32 = us->us_udp_mib.udpOutErrors; netstack_rele(ns); return (0); } /* * Read-side synchronous stream info entry point, called as a * result of handling certain STREAMS ioctl operations. */ static int udp_rinfop(queue_t *q, infod_t *dp) { mblk_t *mp; uint_t cmd = dp->d_cmd; int res = 0; int error = 0; udp_t *udp = Q_TO_UDP(q); struct stdata *stp = STREAM(q); mutex_enter(&udp->udp_drain_lock); /* If shutdown on read has happened, return nothing */ mutex_enter(&stp->sd_lock); if (stp->sd_flag & STREOF) { mutex_exit(&stp->sd_lock); goto done; } mutex_exit(&stp->sd_lock); if ((mp = udp->udp_rcv_list_head) == NULL) goto done; ASSERT(DB_TYPE(mp) != M_DATA && mp->b_cont != NULL); if (cmd & INFOD_COUNT) { /* * Return the number of messages. */ dp->d_count += udp->udp_rcv_msgcnt; res |= INFOD_COUNT; } if (cmd & INFOD_BYTES) { /* * Return size of all data messages. */ dp->d_bytes += udp->udp_rcv_cnt; res |= INFOD_BYTES; } if (cmd & INFOD_FIRSTBYTES) { /* * Return size of first data message. */ dp->d_bytes = msgdsize(mp); res |= INFOD_FIRSTBYTES; dp->d_cmd &= ~INFOD_FIRSTBYTES; } if (cmd & INFOD_COPYOUT) { mblk_t *mp1 = mp->b_cont; int n; /* * Return data contents of first message. */ ASSERT(DB_TYPE(mp1) == M_DATA); while (mp1 != NULL && dp->d_uiop->uio_resid > 0) { n = MIN(dp->d_uiop->uio_resid, MBLKL(mp1)); if (n != 0 && (error = uiomove((char *)mp1->b_rptr, n, UIO_READ, dp->d_uiop)) != 0) { goto done; } mp1 = mp1->b_cont; } res |= INFOD_COPYOUT; dp->d_cmd &= ~INFOD_COPYOUT; } done: mutex_exit(&udp->udp_drain_lock); dp->d_res |= res; return (error); } /* * Read-side synchronous stream entry point. This is called as a result * of recv/read operation done at sockfs, and is guaranteed to execute * outside of the interrupt thread context. It returns a single datagram * (b_cont chain of T_UNITDATA_IND plus data) to the upper layer. */ static int udp_rrw(queue_t *q, struiod_t *dp) { mblk_t *mp; udp_t *udp = Q_TO_UDP(q); udp_stack_t *us = udp->udp_us; /* * Dequeue datagram from the head of the list and return * it to caller; also ensure that RSLEEP sd_wakeq flag is * set/cleared depending on whether or not there's data * remaining in the list. */ mutex_enter(&udp->udp_drain_lock); if (!udp->udp_direct_sockfs) { mutex_exit(&udp->udp_drain_lock); UDP_STAT(us, udp_rrw_busy); return (EBUSY); } if ((mp = udp->udp_rcv_list_head) != NULL) { uint_t size = msgdsize(mp); /* Last datagram in the list? */ if ((udp->udp_rcv_list_head = mp->b_next) == NULL) udp->udp_rcv_list_tail = NULL; mp->b_next = NULL; udp->udp_rcv_cnt -= size; udp->udp_rcv_msgcnt--; UDP_STAT(us, udp_rrw_msgcnt); /* No longer flow-controlling? */ if (udp->udp_rcv_cnt < udp->udp_rcv_hiwat && udp->udp_rcv_msgcnt < udp->udp_rcv_hiwat) udp->udp_drain_qfull = B_FALSE; } if (udp->udp_rcv_list_head == NULL) { /* * Either we just dequeued the last datagram or * we get here from sockfs and have nothing to * return; in this case clear RSLEEP. */ ASSERT(udp->udp_rcv_cnt == 0); ASSERT(udp->udp_rcv_msgcnt == 0); ASSERT(udp->udp_rcv_list_tail == NULL); STR_WAKEUP_CLEAR(STREAM(q)); } else { /* * More data follows; we need udp_rrw() to be * called in future to pick up the rest. */ STR_WAKEUP_SET(STREAM(q)); } mutex_exit(&udp->udp_drain_lock); dp->d_mp = mp; return (0); } /* * Enqueue a completely-built T_UNITDATA_IND message into the receive * list; this is typically executed within the interrupt thread context * and so we do things as quickly as possible. */ static void udp_rcv_enqueue(queue_t *q, udp_t *udp, mblk_t *mp, uint_t pkt_len) { ASSERT(q == RD(q)); ASSERT(pkt_len == msgdsize(mp)); ASSERT(mp->b_next == NULL && mp->b_cont != NULL); ASSERT(DB_TYPE(mp) == M_PROTO && DB_TYPE(mp->b_cont) == M_DATA); ASSERT(MBLKL(mp) >= sizeof (struct T_unitdata_ind)); mutex_enter(&udp->udp_drain_lock); /* * Wake up and signal the receiving app; it is okay to do this * before enqueueing the mp because we are holding the drain lock. * One of the advantages of synchronous stream is the ability for * us to find out when the application performs a read on the * socket by way of udp_rrw() entry point being called. We need * to generate SIGPOLL/SIGIO for each received data in the case * of asynchronous socket just as in the strrput() case. However, * we only wake the application up when necessary, i.e. during the * first enqueue. When udp_rrw() is called, we send up a single * datagram upstream and call STR_WAKEUP_SET() again when there * are still data remaining in our receive queue. */ if (udp->udp_rcv_list_head == NULL) { STR_WAKEUP_SET(STREAM(q)); udp->udp_rcv_list_head = mp; } else { udp->udp_rcv_list_tail->b_next = mp; } udp->udp_rcv_list_tail = mp; udp->udp_rcv_cnt += pkt_len; udp->udp_rcv_msgcnt++; /* Need to flow-control? */ if (udp->udp_rcv_cnt >= udp->udp_rcv_hiwat || udp->udp_rcv_msgcnt >= udp->udp_rcv_hiwat) udp->udp_drain_qfull = B_TRUE; /* Update poll events and send SIGPOLL/SIGIO if necessary */ STR_SENDSIG(STREAM(q)); mutex_exit(&udp->udp_drain_lock); } /* * Drain the contents of receive list to the module upstream; we do * this during close or when we fallback to the slow mode due to * sockmod being popped or a module being pushed on top of us. */ static void udp_rcv_drain(queue_t *q, udp_t *udp, boolean_t closing) { mblk_t *mp; udp_stack_t *us = udp->udp_us; ASSERT(q == RD(q)); mutex_enter(&udp->udp_drain_lock); /* * There is no race with a concurrent udp_input() sending * up packets using putnext() after we have cleared the * udp_direct_sockfs flag but before we have completed * sending up the packets in udp_rcv_list, since we are * either a writer or we have quiesced the conn. */ udp->udp_direct_sockfs = B_FALSE; mutex_exit(&udp->udp_drain_lock); if (udp->udp_rcv_list_head != NULL) UDP_STAT(us, udp_drain); /* * Send up everything via putnext(); note here that we * don't need the udp_drain_lock to protect us since * nothing can enter udp_rrw() and that we currently * have exclusive access to this udp. */ while ((mp = udp->udp_rcv_list_head) != NULL) { udp->udp_rcv_list_head = mp->b_next; mp->b_next = NULL; udp->udp_rcv_cnt -= msgdsize(mp); udp->udp_rcv_msgcnt--; if (closing) { freemsg(mp); } else { putnext(q, mp); } } ASSERT(udp->udp_rcv_cnt == 0); ASSERT(udp->udp_rcv_msgcnt == 0); ASSERT(udp->udp_rcv_list_head == NULL); udp->udp_rcv_list_tail = NULL; udp->udp_drain_qfull = B_FALSE; } static size_t udp_set_rcv_hiwat(udp_t *udp, size_t size) { udp_stack_t *us = udp->udp_us; /* We add a bit of extra buffering */ size += size >> 1; if (size > us->us_max_buf) size = us->us_max_buf; udp->udp_rcv_hiwat = size; return (size); } /* * For the lower queue so that UDP can be a dummy mux. * Nobody should be sending * packets up this stream */ static void udp_lrput(queue_t *q, mblk_t *mp) { mblk_t *mp1; switch (mp->b_datap->db_type) { case M_FLUSH: /* Turn around */ if (*mp->b_rptr & FLUSHW) { *mp->b_rptr &= ~FLUSHR; qreply(q, mp); return; } break; } /* Could receive messages that passed through ar_rput */ for (mp1 = mp; mp1; mp1 = mp1->b_cont) mp1->b_prev = mp1->b_next = NULL; freemsg(mp); } /* * For the lower queue so that UDP can be a dummy mux. * Nobody should be sending packets down this stream. */ /* ARGSUSED */ void udp_lwput(queue_t *q, mblk_t *mp) { freemsg(mp); }