1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #ifdef INET6 38 #include <sys/proc.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctp_var.h> 42 #include <netinet6/sctp6_var.h> 43 #include <netinet/sctp_sysctl.h> 44 #include <netinet/sctp_output.h> 45 #include <netinet/sctp_uio.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctputil.h> 48 #include <netinet/sctp_indata.h> 49 #include <netinet/sctp_timer.h> 50 #include <netinet/sctp_auth.h> 51 #include <netinet/sctp_input.h> 52 #include <netinet/sctp_output.h> 53 #include <netinet/sctp_bsd_addr.h> 54 #include <netinet/sctp_crc32.h> 55 #include <netinet/icmp6.h> 56 #include <netinet/udp.h> 57 58 #ifdef IPSEC 59 #include <netipsec/ipsec.h> 60 #include <netipsec/ipsec6.h> 61 #endif /* IPSEC */ 62 63 extern struct protosw inetsw[]; 64 65 int 66 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 67 { 68 struct mbuf *m; 69 int iphlen; 70 uint32_t vrf_id; 71 uint8_t ecn_bits; 72 struct sockaddr_in6 src, dst; 73 struct ip6_hdr *ip6; 74 struct sctphdr *sh; 75 struct sctp_chunkhdr *ch; 76 int length, offset; 77 #if !defined(SCTP_WITH_NO_CSUM) 78 uint8_t compute_crc; 79 #endif 80 uint32_t mflowid; 81 uint8_t mflowtype; 82 uint16_t fibnum; 83 84 iphlen = *offp; 85 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 86 SCTP_RELEASE_PKT(*i_pak); 87 return (IPPROTO_DONE); 88 } 89 m = SCTP_HEADER_TO_CHAIN(*i_pak); 90 #ifdef SCTP_MBUF_LOGGING 91 /* Log in any input mbufs */ 92 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 93 sctp_log_mbc(m, SCTP_MBUF_INPUT); 94 } 95 #endif 96 #ifdef SCTP_PACKET_LOGGING 97 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 98 sctp_packet_log(m); 99 } 100 #endif 101 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 102 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 103 m->m_pkthdr.len, 104 if_name(m->m_pkthdr.rcvif), 105 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 106 mflowid = m->m_pkthdr.flowid; 107 mflowtype = M_HASHTYPE_GET(m); 108 fibnum = M_GETFIB(m); 109 SCTP_STAT_INCR(sctps_recvpackets); 110 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 111 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 112 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 113 ip6 = mtod(m, struct ip6_hdr *); 114 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 115 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 116 if (sh == NULL) { 117 SCTP_STAT_INCR(sctps_hdrops); 118 return (IPPROTO_DONE); 119 } 120 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 121 offset -= sizeof(struct sctp_chunkhdr); 122 memset(&src, 0, sizeof(struct sockaddr_in6)); 123 src.sin6_family = AF_INET6; 124 src.sin6_len = sizeof(struct sockaddr_in6); 125 src.sin6_port = sh->src_port; 126 src.sin6_addr = ip6->ip6_src; 127 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 128 goto out; 129 } 130 memset(&dst, 0, sizeof(struct sockaddr_in6)); 131 dst.sin6_family = AF_INET6; 132 dst.sin6_len = sizeof(struct sockaddr_in6); 133 dst.sin6_port = sh->dest_port; 134 dst.sin6_addr = ip6->ip6_dst; 135 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 136 goto out; 137 } 138 length = ntohs(ip6->ip6_plen) + iphlen; 139 /* Validate mbuf chain length with IP payload length. */ 140 if (SCTP_HEADER_LEN(m) != length) { 141 SCTPDBG(SCTP_DEBUG_INPUT1, 142 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 143 SCTP_STAT_INCR(sctps_hdrops); 144 goto out; 145 } 146 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 147 goto out; 148 } 149 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 150 #if defined(SCTP_WITH_NO_CSUM) 151 SCTP_STAT_INCR(sctps_recvnocrc); 152 #else 153 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 154 SCTP_STAT_INCR(sctps_recvhwcrc); 155 compute_crc = 0; 156 } else { 157 SCTP_STAT_INCR(sctps_recvswcrc); 158 compute_crc = 1; 159 } 160 #endif 161 sctp_common_input_processing(&m, iphlen, offset, length, 162 (struct sockaddr *)&src, 163 (struct sockaddr *)&dst, 164 sh, ch, 165 #if !defined(SCTP_WITH_NO_CSUM) 166 compute_crc, 167 #endif 168 ecn_bits, 169 mflowtype, mflowid, fibnum, 170 vrf_id, port); 171 out: 172 if (m) { 173 sctp_m_freem(m); 174 } 175 return (IPPROTO_DONE); 176 } 177 178 179 int 180 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 181 { 182 return (sctp6_input_with_port(i_pak, offp, 0)); 183 } 184 185 void 186 sctp6_notify(struct sctp_inpcb *inp, 187 struct sctp_tcb *stcb, 188 struct sctp_nets *net, 189 uint8_t icmp6_type, 190 uint8_t icmp6_code, 191 uint16_t next_mtu) 192 { 193 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 194 struct socket *so; 195 #endif 196 int timer_stopped; 197 198 switch (icmp6_type) { 199 case ICMP6_DST_UNREACH: 200 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || 201 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || 202 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || 203 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { 204 /* Mark the net unreachable. */ 205 if (net->dest_state & SCTP_ADDR_REACHABLE) { 206 /* Ok that destination is not reachable */ 207 net->dest_state &= ~SCTP_ADDR_REACHABLE; 208 net->dest_state &= ~SCTP_ADDR_PF; 209 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 210 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 211 } 212 } 213 SCTP_TCB_UNLOCK(stcb); 214 break; 215 case ICMP6_PARAM_PROB: 216 /* Treat it like an ABORT. */ 217 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { 218 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 219 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 220 so = SCTP_INP_SO(inp); 221 atomic_add_int(&stcb->asoc.refcnt, 1); 222 SCTP_TCB_UNLOCK(stcb); 223 SCTP_SOCKET_LOCK(so, 1); 224 SCTP_TCB_LOCK(stcb); 225 atomic_subtract_int(&stcb->asoc.refcnt, 1); 226 #endif 227 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 228 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 229 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 230 SCTP_SOCKET_UNLOCK(so, 1); 231 #endif 232 } else { 233 SCTP_TCB_UNLOCK(stcb); 234 } 235 break; 236 case ICMP6_PACKET_TOO_BIG: 237 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 238 timer_stopped = 1; 239 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 240 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 241 } else { 242 timer_stopped = 0; 243 } 244 /* Update the path MTU. */ 245 if (net->mtu > next_mtu) { 246 net->mtu = next_mtu; 247 if (net->port) { 248 net->mtu -= sizeof(struct udphdr); 249 } 250 } 251 /* Update the association MTU */ 252 if (stcb->asoc.smallest_mtu > next_mtu) { 253 sctp_pathmtu_adjustment(stcb, next_mtu); 254 } 255 /* Finally, start the PMTU timer if it was running before. */ 256 if (timer_stopped) { 257 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 258 } 259 SCTP_TCB_UNLOCK(stcb); 260 break; 261 default: 262 SCTP_TCB_UNLOCK(stcb); 263 break; 264 } 265 } 266 267 void 268 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 269 { 270 struct ip6ctlparam *ip6cp; 271 struct sctp_inpcb *inp; 272 struct sctp_tcb *stcb; 273 struct sctp_nets *net; 274 struct sctphdr sh; 275 struct sockaddr_in6 src, dst; 276 277 if (pktdst->sa_family != AF_INET6 || 278 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 279 return; 280 } 281 if ((unsigned)cmd >= PRC_NCMDS) { 282 return; 283 } 284 if (PRC_IS_REDIRECT(cmd)) { 285 d = NULL; 286 } else if (inet6ctlerrmap[cmd] == 0) { 287 return; 288 } 289 /* If the parameter is from icmp6, decode it. */ 290 if (d != NULL) { 291 ip6cp = (struct ip6ctlparam *)d; 292 } else { 293 ip6cp = (struct ip6ctlparam *)NULL; 294 } 295 296 if (ip6cp != NULL) { 297 /* 298 * XXX: We assume that when IPV6 is non NULL, M and OFF are 299 * valid. 300 */ 301 if (ip6cp->ip6c_m == NULL) { 302 return; 303 } 304 /* 305 * Check if we can safely examine the ports and the 306 * verification tag of the SCTP common header. 307 */ 308 if (ip6cp->ip6c_m->m_pkthdr.len < 309 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 310 return; 311 } 312 /* Copy out the port numbers and the verification tag. */ 313 bzero(&sh, sizeof(sh)); 314 m_copydata(ip6cp->ip6c_m, 315 ip6cp->ip6c_off, 316 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 317 (caddr_t)&sh); 318 memset(&src, 0, sizeof(struct sockaddr_in6)); 319 src.sin6_family = AF_INET6; 320 src.sin6_len = sizeof(struct sockaddr_in6); 321 src.sin6_port = sh.src_port; 322 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 323 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 324 return; 325 } 326 memset(&dst, 0, sizeof(struct sockaddr_in6)); 327 dst.sin6_family = AF_INET6; 328 dst.sin6_len = sizeof(struct sockaddr_in6); 329 dst.sin6_port = sh.dest_port; 330 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 331 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 332 return; 333 } 334 inp = NULL; 335 net = NULL; 336 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 337 (struct sockaddr *)&src, 338 &inp, &net, 1, SCTP_DEFAULT_VRFID); 339 if ((stcb != NULL) && 340 (net != NULL) && 341 (inp != NULL)) { 342 /* Check the verification tag */ 343 if (ntohl(sh.v_tag) != 0) { 344 /* 345 * This must be the verification tag used 346 * for sending out packets. We don't 347 * consider packets reflecting the 348 * verification tag. 349 */ 350 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 351 SCTP_TCB_UNLOCK(stcb); 352 return; 353 } 354 } else { 355 if (ip6cp->ip6c_m->m_pkthdr.len >= 356 ip6cp->ip6c_off + sizeof(struct sctphdr) + 357 sizeof(struct sctp_chunkhdr) + 358 offsetof(struct sctp_init, a_rwnd)) { 359 /* 360 * In this case we can check if we 361 * got an INIT chunk and if the 362 * initiate tag matches. 363 */ 364 uint32_t initiate_tag; 365 uint8_t chunk_type; 366 367 m_copydata(ip6cp->ip6c_m, 368 ip6cp->ip6c_off + 369 sizeof(struct sctphdr), 370 sizeof(uint8_t), 371 (caddr_t)&chunk_type); 372 m_copydata(ip6cp->ip6c_m, 373 ip6cp->ip6c_off + 374 sizeof(struct sctphdr) + 375 sizeof(struct sctp_chunkhdr), 376 sizeof(uint32_t), 377 (caddr_t)&initiate_tag); 378 if ((chunk_type != SCTP_INITIATION) || 379 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 380 SCTP_TCB_UNLOCK(stcb); 381 return; 382 } 383 } else { 384 SCTP_TCB_UNLOCK(stcb); 385 return; 386 } 387 } 388 sctp6_notify(inp, stcb, net, 389 ip6cp->ip6c_icmp6->icmp6_type, 390 ip6cp->ip6c_icmp6->icmp6_code, 391 (uint16_t)ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 392 } else { 393 if ((stcb == NULL) && (inp != NULL)) { 394 /* reduce inp's ref-count */ 395 SCTP_INP_WLOCK(inp); 396 SCTP_INP_DECR_REF(inp); 397 SCTP_INP_WUNLOCK(inp); 398 } 399 if (stcb) { 400 SCTP_TCB_UNLOCK(stcb); 401 } 402 } 403 } 404 } 405 406 /* 407 * this routine can probably be collasped into the one in sctp_userreq.c 408 * since they do the same thing and now we lookup with a sockaddr 409 */ 410 static int 411 sctp6_getcred(SYSCTL_HANDLER_ARGS) 412 { 413 struct xucred xuc; 414 struct sockaddr_in6 addrs[2]; 415 struct sctp_inpcb *inp; 416 struct sctp_nets *net; 417 struct sctp_tcb *stcb; 418 int error; 419 uint32_t vrf_id; 420 421 vrf_id = SCTP_DEFAULT_VRFID; 422 423 error = priv_check(req->td, PRIV_NETINET_GETCRED); 424 if (error) 425 return (error); 426 427 if (req->newlen != sizeof(addrs)) { 428 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 429 return (EINVAL); 430 } 431 if (req->oldlen != sizeof(struct ucred)) { 432 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 433 return (EINVAL); 434 } 435 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 436 if (error) 437 return (error); 438 439 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 440 sin6tosa(&addrs[0]), 441 &inp, &net, 1, vrf_id); 442 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 443 if ((inp != NULL) && (stcb == NULL)) { 444 /* reduce ref-count */ 445 SCTP_INP_WLOCK(inp); 446 SCTP_INP_DECR_REF(inp); 447 goto cred_can_cont; 448 } 449 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 450 error = ENOENT; 451 goto out; 452 } 453 SCTP_TCB_UNLOCK(stcb); 454 /* 455 * We use the write lock here, only since in the error leg we need 456 * it. If we used RLOCK, then we would have to 457 * wlock/decr/unlock/rlock. Which in theory could create a hole. 458 * Better to use higher wlock. 459 */ 460 SCTP_INP_WLOCK(inp); 461 cred_can_cont: 462 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 463 if (error) { 464 SCTP_INP_WUNLOCK(inp); 465 goto out; 466 } 467 cru2x(inp->sctp_socket->so_cred, &xuc); 468 SCTP_INP_WUNLOCK(inp); 469 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 470 out: 471 return (error); 472 } 473 474 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 475 0, 0, 476 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 477 478 479 /* This is the same as the sctp_abort() could be made common */ 480 static void 481 sctp6_abort(struct socket *so) 482 { 483 struct sctp_inpcb *inp; 484 uint32_t flags; 485 486 inp = (struct sctp_inpcb *)so->so_pcb; 487 if (inp == NULL) { 488 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 489 return; 490 } 491 sctp_must_try_again: 492 flags = inp->sctp_flags; 493 #ifdef SCTP_LOG_CLOSING 494 sctp_log_closing(inp, NULL, 17); 495 #endif 496 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 497 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 498 #ifdef SCTP_LOG_CLOSING 499 sctp_log_closing(inp, NULL, 16); 500 #endif 501 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 502 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 503 SOCK_LOCK(so); 504 SCTP_SB_CLEAR(so->so_snd); 505 /* 506 * same for the rcv ones, they are only here for the 507 * accounting/select. 508 */ 509 SCTP_SB_CLEAR(so->so_rcv); 510 /* Now null out the reference, we are completely detached. */ 511 so->so_pcb = NULL; 512 SOCK_UNLOCK(so); 513 } else { 514 flags = inp->sctp_flags; 515 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 516 goto sctp_must_try_again; 517 } 518 } 519 return; 520 } 521 522 static int 523 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 524 { 525 struct in6pcb *inp6; 526 int error; 527 struct sctp_inpcb *inp; 528 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 529 530 inp = (struct sctp_inpcb *)so->so_pcb; 531 if (inp != NULL) { 532 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 533 return (EINVAL); 534 } 535 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 536 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 537 if (error) 538 return (error); 539 } 540 error = sctp_inpcb_alloc(so, vrf_id); 541 if (error) 542 return (error); 543 inp = (struct sctp_inpcb *)so->so_pcb; 544 SCTP_INP_WLOCK(inp); 545 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 546 inp6 = (struct in6pcb *)inp; 547 548 inp6->inp_vflag |= INP_IPV6; 549 inp6->in6p_hops = -1; /* use kernel default */ 550 inp6->in6p_cksum = -1; /* just to be sure */ 551 #ifdef INET 552 /* 553 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 554 * socket as well, because the socket may be bound to an IPv6 555 * wildcard address, which may match an IPv4-mapped IPv6 address. 556 */ 557 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 558 #endif 559 /* 560 * Hmm what about the IPSEC stuff that is missing here but in 561 * sctp_attach()? 562 */ 563 SCTP_INP_WUNLOCK(inp); 564 return (0); 565 } 566 567 static int 568 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 569 { 570 struct sctp_inpcb *inp; 571 struct in6pcb *inp6; 572 int error; 573 574 inp = (struct sctp_inpcb *)so->so_pcb; 575 if (inp == NULL) { 576 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 577 return (EINVAL); 578 } 579 if (addr) { 580 switch (addr->sa_family) { 581 #ifdef INET 582 case AF_INET: 583 if (addr->sa_len != sizeof(struct sockaddr_in)) { 584 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 585 return (EINVAL); 586 } 587 break; 588 #endif 589 #ifdef INET6 590 case AF_INET6: 591 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 592 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 593 return (EINVAL); 594 } 595 break; 596 #endif 597 default: 598 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 599 return (EINVAL); 600 } 601 } 602 inp6 = (struct in6pcb *)inp; 603 inp6->inp_vflag &= ~INP_IPV4; 604 inp6->inp_vflag |= INP_IPV6; 605 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 606 switch (addr->sa_family) { 607 #ifdef INET 608 case AF_INET: 609 /* binding v4 addr to v6 socket, so reset flags */ 610 inp6->inp_vflag |= INP_IPV4; 611 inp6->inp_vflag &= ~INP_IPV6; 612 break; 613 #endif 614 #ifdef INET6 615 case AF_INET6: 616 { 617 struct sockaddr_in6 *sin6_p; 618 619 sin6_p = (struct sockaddr_in6 *)addr; 620 621 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 622 inp6->inp_vflag |= INP_IPV4; 623 } 624 #ifdef INET 625 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 626 struct sockaddr_in sin; 627 628 in6_sin6_2_sin(&sin, sin6_p); 629 inp6->inp_vflag |= INP_IPV4; 630 inp6->inp_vflag &= ~INP_IPV6; 631 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 632 return (error); 633 } 634 #endif 635 break; 636 } 637 #endif 638 default: 639 break; 640 } 641 } else if (addr != NULL) { 642 struct sockaddr_in6 *sin6_p; 643 644 /* IPV6_V6ONLY socket */ 645 #ifdef INET 646 if (addr->sa_family == AF_INET) { 647 /* can't bind v4 addr to v6 only socket! */ 648 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 649 return (EINVAL); 650 } 651 #endif 652 sin6_p = (struct sockaddr_in6 *)addr; 653 654 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 655 /* can't bind v4-mapped addrs either! */ 656 /* NOTE: we don't support SIIT */ 657 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 658 return (EINVAL); 659 } 660 } 661 error = sctp_inpcb_bind(so, addr, NULL, p); 662 return (error); 663 } 664 665 666 static void 667 sctp6_close(struct socket *so) 668 { 669 sctp_close(so); 670 } 671 672 /* This could be made common with sctp_detach() since they are identical */ 673 674 static 675 int 676 sctp6_disconnect(struct socket *so) 677 { 678 return (sctp_disconnect(so)); 679 } 680 681 682 int 683 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 684 struct mbuf *control, struct thread *p); 685 686 687 static int 688 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 689 struct mbuf *control, struct thread *p) 690 { 691 struct sctp_inpcb *inp; 692 struct in6pcb *inp6; 693 694 #ifdef INET 695 struct sockaddr_in6 *sin6; 696 #endif /* INET */ 697 /* No SPL needed since sctp_output does this */ 698 699 inp = (struct sctp_inpcb *)so->so_pcb; 700 if (inp == NULL) { 701 if (control) { 702 SCTP_RELEASE_PKT(control); 703 control = NULL; 704 } 705 SCTP_RELEASE_PKT(m); 706 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 707 return (EINVAL); 708 } 709 inp6 = (struct in6pcb *)inp; 710 /* 711 * For the TCP model we may get a NULL addr, if we are a connected 712 * socket thats ok. 713 */ 714 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 715 (addr == NULL)) { 716 goto connected_type; 717 } 718 if (addr == NULL) { 719 SCTP_RELEASE_PKT(m); 720 if (control) { 721 SCTP_RELEASE_PKT(control); 722 control = NULL; 723 } 724 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 725 return (EDESTADDRREQ); 726 } 727 #ifdef INET 728 sin6 = (struct sockaddr_in6 *)addr; 729 if (SCTP_IPV6_V6ONLY(inp6)) { 730 /* 731 * if IPV6_V6ONLY flag, we discard datagrams destined to a 732 * v4 addr or v4-mapped addr 733 */ 734 if (addr->sa_family == AF_INET) { 735 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 736 return (EINVAL); 737 } 738 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 740 return (EINVAL); 741 } 742 } 743 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 744 struct sockaddr_in sin; 745 746 /* convert v4-mapped into v4 addr and send */ 747 in6_sin6_2_sin(&sin, sin6); 748 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 749 } 750 #endif /* INET */ 751 connected_type: 752 /* now what about control */ 753 if (control) { 754 if (inp->control) { 755 SCTP_PRINTF("huh? control set?\n"); 756 SCTP_RELEASE_PKT(inp->control); 757 inp->control = NULL; 758 } 759 inp->control = control; 760 } 761 /* Place the data */ 762 if (inp->pkt) { 763 SCTP_BUF_NEXT(inp->pkt_last) = m; 764 inp->pkt_last = m; 765 } else { 766 inp->pkt_last = inp->pkt = m; 767 } 768 if ( 769 /* FreeBSD and MacOSX uses a flag passed */ 770 ((flags & PRUS_MORETOCOME) == 0) 771 ) { 772 /* 773 * note with the current version this code will only be used 774 * by OpenBSD, NetBSD and FreeBSD have methods for 775 * re-defining sosend() to use sctp_sosend(). One can 776 * optionaly switch back to this code (by changing back the 777 * defininitions but this is not advisable. 778 */ 779 int ret; 780 781 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 782 inp->pkt = NULL; 783 inp->control = NULL; 784 return (ret); 785 } else { 786 return (0); 787 } 788 } 789 790 static int 791 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 792 { 793 uint32_t vrf_id; 794 int error = 0; 795 struct sctp_inpcb *inp; 796 struct sctp_tcb *stcb; 797 #ifdef INET 798 struct in6pcb *inp6; 799 struct sockaddr_in6 *sin6; 800 union sctp_sockstore store; 801 #endif 802 803 #ifdef INET 804 inp6 = (struct in6pcb *)so->so_pcb; 805 #endif 806 inp = (struct sctp_inpcb *)so->so_pcb; 807 if (inp == NULL) { 808 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 809 return (ECONNRESET); /* I made the same as TCP since we are 810 * not setup? */ 811 } 812 if (addr == NULL) { 813 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 814 return (EINVAL); 815 } 816 switch (addr->sa_family) { 817 #ifdef INET 818 case AF_INET: 819 if (addr->sa_len != sizeof(struct sockaddr_in)) { 820 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 821 return (EINVAL); 822 } 823 break; 824 #endif 825 #ifdef INET6 826 case AF_INET6: 827 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 828 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 829 return (EINVAL); 830 } 831 break; 832 #endif 833 default: 834 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 835 return (EINVAL); 836 } 837 838 vrf_id = inp->def_vrf_id; 839 SCTP_ASOC_CREATE_LOCK(inp); 840 SCTP_INP_RLOCK(inp); 841 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 842 SCTP_PCB_FLAGS_UNBOUND) { 843 /* Bind a ephemeral port */ 844 SCTP_INP_RUNLOCK(inp); 845 error = sctp6_bind(so, NULL, p); 846 if (error) { 847 SCTP_ASOC_CREATE_UNLOCK(inp); 848 849 return (error); 850 } 851 SCTP_INP_RLOCK(inp); 852 } 853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 854 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 855 /* We are already connected AND the TCP model */ 856 SCTP_INP_RUNLOCK(inp); 857 SCTP_ASOC_CREATE_UNLOCK(inp); 858 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 859 return (EADDRINUSE); 860 } 861 #ifdef INET 862 sin6 = (struct sockaddr_in6 *)addr; 863 if (SCTP_IPV6_V6ONLY(inp6)) { 864 /* 865 * if IPV6_V6ONLY flag, ignore connections destined to a v4 866 * addr or v4-mapped addr 867 */ 868 if (addr->sa_family == AF_INET) { 869 SCTP_INP_RUNLOCK(inp); 870 SCTP_ASOC_CREATE_UNLOCK(inp); 871 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 872 return (EINVAL); 873 } 874 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 875 SCTP_INP_RUNLOCK(inp); 876 SCTP_ASOC_CREATE_UNLOCK(inp); 877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 878 return (EINVAL); 879 } 880 } 881 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 882 /* convert v4-mapped into v4 addr */ 883 in6_sin6_2_sin(&store.sin, sin6); 884 addr = &store.sa; 885 } 886 #endif /* INET */ 887 /* Now do we connect? */ 888 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 889 stcb = LIST_FIRST(&inp->sctp_asoc_list); 890 if (stcb) { 891 SCTP_TCB_UNLOCK(stcb); 892 } 893 SCTP_INP_RUNLOCK(inp); 894 } else { 895 SCTP_INP_RUNLOCK(inp); 896 SCTP_INP_WLOCK(inp); 897 SCTP_INP_INCR_REF(inp); 898 SCTP_INP_WUNLOCK(inp); 899 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 900 if (stcb == NULL) { 901 SCTP_INP_WLOCK(inp); 902 SCTP_INP_DECR_REF(inp); 903 SCTP_INP_WUNLOCK(inp); 904 } 905 } 906 907 if (stcb != NULL) { 908 /* Already have or am bring up an association */ 909 SCTP_ASOC_CREATE_UNLOCK(inp); 910 SCTP_TCB_UNLOCK(stcb); 911 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 912 return (EALREADY); 913 } 914 /* We are GOOD to go */ 915 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 916 inp->sctp_ep.pre_open_stream_count, 917 inp->sctp_ep.port, p); 918 SCTP_ASOC_CREATE_UNLOCK(inp); 919 if (stcb == NULL) { 920 /* Gak! no memory */ 921 return (error); 922 } 923 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 924 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 925 /* Set the connected flag so we can queue data */ 926 soisconnecting(so); 927 } 928 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 929 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 930 931 /* initialize authentication parameters for the assoc */ 932 sctp_initialize_auth_params(inp, stcb); 933 934 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 935 SCTP_TCB_UNLOCK(stcb); 936 return (error); 937 } 938 939 static int 940 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 941 { 942 struct sockaddr_in6 *sin6; 943 struct sctp_inpcb *inp; 944 uint32_t vrf_id; 945 struct sctp_ifa *sctp_ifa; 946 947 int error; 948 949 /* 950 * Do the malloc first in case it blocks. 951 */ 952 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 953 if (sin6 == NULL) 954 return (ENOMEM); 955 sin6->sin6_family = AF_INET6; 956 sin6->sin6_len = sizeof(*sin6); 957 958 inp = (struct sctp_inpcb *)so->so_pcb; 959 if (inp == NULL) { 960 SCTP_FREE_SONAME(sin6); 961 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 962 return (ECONNRESET); 963 } 964 SCTP_INP_RLOCK(inp); 965 sin6->sin6_port = inp->sctp_lport; 966 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 967 /* For the bound all case you get back 0 */ 968 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 969 struct sctp_tcb *stcb; 970 struct sockaddr_in6 *sin_a6; 971 struct sctp_nets *net; 972 int fnd; 973 974 stcb = LIST_FIRST(&inp->sctp_asoc_list); 975 if (stcb == NULL) { 976 SCTP_INP_RUNLOCK(inp); 977 SCTP_FREE_SONAME(sin6); 978 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 979 return (ENOENT); 980 } 981 fnd = 0; 982 sin_a6 = NULL; 983 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 984 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 985 if (sin_a6 == NULL) 986 /* this will make coverity happy */ 987 continue; 988 989 if (sin_a6->sin6_family == AF_INET6) { 990 fnd = 1; 991 break; 992 } 993 } 994 if ((!fnd) || (sin_a6 == NULL)) { 995 /* punt */ 996 SCTP_INP_RUNLOCK(inp); 997 SCTP_FREE_SONAME(sin6); 998 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 999 return (ENOENT); 1000 } 1001 vrf_id = inp->def_vrf_id; 1002 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 1003 if (sctp_ifa) { 1004 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1005 } 1006 } else { 1007 /* For the bound all case you get back 0 */ 1008 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1009 } 1010 } else { 1011 /* Take the first IPv6 address in the list */ 1012 struct sctp_laddr *laddr; 1013 int fnd = 0; 1014 1015 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1016 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1017 struct sockaddr_in6 *sin_a; 1018 1019 sin_a = &laddr->ifa->address.sin6; 1020 sin6->sin6_addr = sin_a->sin6_addr; 1021 fnd = 1; 1022 break; 1023 } 1024 } 1025 if (!fnd) { 1026 SCTP_FREE_SONAME(sin6); 1027 SCTP_INP_RUNLOCK(inp); 1028 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1029 return (ENOENT); 1030 } 1031 } 1032 SCTP_INP_RUNLOCK(inp); 1033 /* Scoping things for v6 */ 1034 if ((error = sa6_recoverscope(sin6)) != 0) { 1035 SCTP_FREE_SONAME(sin6); 1036 return (error); 1037 } 1038 (*addr) = (struct sockaddr *)sin6; 1039 return (0); 1040 } 1041 1042 static int 1043 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1044 { 1045 struct sockaddr_in6 *sin6; 1046 int fnd; 1047 struct sockaddr_in6 *sin_a6; 1048 struct sctp_inpcb *inp; 1049 struct sctp_tcb *stcb; 1050 struct sctp_nets *net; 1051 int error; 1052 1053 /* Do the malloc first in case it blocks. */ 1054 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1055 if (sin6 == NULL) 1056 return (ENOMEM); 1057 sin6->sin6_family = AF_INET6; 1058 sin6->sin6_len = sizeof(*sin6); 1059 1060 inp = (struct sctp_inpcb *)so->so_pcb; 1061 if ((inp == NULL) || 1062 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1063 /* UDP type and listeners will drop out here */ 1064 SCTP_FREE_SONAME(sin6); 1065 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1066 return (ENOTCONN); 1067 } 1068 SCTP_INP_RLOCK(inp); 1069 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1070 if (stcb) { 1071 SCTP_TCB_LOCK(stcb); 1072 } 1073 SCTP_INP_RUNLOCK(inp); 1074 if (stcb == NULL) { 1075 SCTP_FREE_SONAME(sin6); 1076 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1077 return (ECONNRESET); 1078 } 1079 fnd = 0; 1080 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1081 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1082 if (sin_a6->sin6_family == AF_INET6) { 1083 fnd = 1; 1084 sin6->sin6_port = stcb->rport; 1085 sin6->sin6_addr = sin_a6->sin6_addr; 1086 break; 1087 } 1088 } 1089 SCTP_TCB_UNLOCK(stcb); 1090 if (!fnd) { 1091 /* No IPv4 address */ 1092 SCTP_FREE_SONAME(sin6); 1093 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1094 return (ENOENT); 1095 } 1096 if ((error = sa6_recoverscope(sin6)) != 0) { 1097 SCTP_FREE_SONAME(sin6); 1098 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1099 return (error); 1100 } 1101 *addr = (struct sockaddr *)sin6; 1102 return (0); 1103 } 1104 1105 static int 1106 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1107 { 1108 struct in6pcb *inp6 = sotoin6pcb(so); 1109 int error; 1110 1111 if (inp6 == NULL) { 1112 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1113 return (EINVAL); 1114 } 1115 /* allow v6 addresses precedence */ 1116 error = sctp6_getaddr(so, nam); 1117 #ifdef INET 1118 if (error) { 1119 struct sockaddr_in6 *sin6; 1120 1121 /* try v4 next if v6 failed */ 1122 error = sctp_ingetaddr(so, nam); 1123 if (error) { 1124 return (error); 1125 } 1126 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1127 if (sin6 == NULL) { 1128 SCTP_FREE_SONAME(*nam); 1129 return (ENOMEM); 1130 } 1131 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1132 SCTP_FREE_SONAME(*nam); 1133 *nam = (struct sockaddr *)sin6; 1134 } 1135 #endif 1136 return (error); 1137 } 1138 1139 1140 static int 1141 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1142 { 1143 struct in6pcb *inp6 = sotoin6pcb(so); 1144 int error; 1145 1146 if (inp6 == NULL) { 1147 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1148 return (EINVAL); 1149 } 1150 /* allow v6 addresses precedence */ 1151 error = sctp6_peeraddr(so, nam); 1152 #ifdef INET 1153 if (error) { 1154 struct sockaddr_in6 *sin6; 1155 1156 /* try v4 next if v6 failed */ 1157 error = sctp_peeraddr(so, nam); 1158 if (error) { 1159 return (error); 1160 } 1161 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1162 if (sin6 == NULL) { 1163 SCTP_FREE_SONAME(*nam); 1164 return (ENOMEM); 1165 } 1166 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1167 SCTP_FREE_SONAME(*nam); 1168 *nam = (struct sockaddr *)sin6; 1169 } 1170 #endif 1171 return (error); 1172 } 1173 1174 struct pr_usrreqs sctp6_usrreqs = { 1175 .pru_abort = sctp6_abort, 1176 .pru_accept = sctp_accept, 1177 .pru_attach = sctp6_attach, 1178 .pru_bind = sctp6_bind, 1179 .pru_connect = sctp6_connect, 1180 .pru_control = in6_control, 1181 .pru_close = sctp6_close, 1182 .pru_detach = sctp6_close, 1183 .pru_sopoll = sopoll_generic, 1184 .pru_flush = sctp_flush, 1185 .pru_disconnect = sctp6_disconnect, 1186 .pru_listen = sctp_listen, 1187 .pru_peeraddr = sctp6_getpeeraddr, 1188 .pru_send = sctp6_send, 1189 .pru_shutdown = sctp_shutdown, 1190 .pru_sockaddr = sctp6_in6getaddr, 1191 .pru_sosend = sctp_sosend, 1192 .pru_soreceive = sctp_soreceive 1193 }; 1194 1195 #endif 1196