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 78 #if !defined(SCTP_WITH_NO_CSUM) 79 uint8_t compute_crc; 80 81 #endif 82 uint32_t mflowid; 83 uint8_t mflowtype; 84 uint16_t fibnum; 85 86 iphlen = *offp; 87 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 88 SCTP_RELEASE_PKT(*i_pak); 89 return (IPPROTO_DONE); 90 } 91 m = SCTP_HEADER_TO_CHAIN(*i_pak); 92 #ifdef SCTP_MBUF_LOGGING 93 /* Log in any input mbufs */ 94 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 95 sctp_log_mbc(m, SCTP_MBUF_INPUT); 96 } 97 #endif 98 #ifdef SCTP_PACKET_LOGGING 99 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 100 sctp_packet_log(m); 101 } 102 #endif 103 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 104 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 105 m->m_pkthdr.len, 106 if_name(m->m_pkthdr.rcvif), 107 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 108 mflowid = m->m_pkthdr.flowid; 109 mflowtype = M_HASHTYPE_GET(m); 110 fibnum = M_GETFIB(m); 111 SCTP_STAT_INCR(sctps_recvpackets); 112 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 113 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 114 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 115 ip6 = mtod(m, struct ip6_hdr *); 116 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 117 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 118 if (sh == NULL) { 119 SCTP_STAT_INCR(sctps_hdrops); 120 return (IPPROTO_DONE); 121 } 122 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 123 offset -= sizeof(struct sctp_chunkhdr); 124 memset(&src, 0, sizeof(struct sockaddr_in6)); 125 src.sin6_family = AF_INET6; 126 src.sin6_len = sizeof(struct sockaddr_in6); 127 src.sin6_port = sh->src_port; 128 src.sin6_addr = ip6->ip6_src; 129 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 130 goto out; 131 } 132 memset(&dst, 0, sizeof(struct sockaddr_in6)); 133 dst.sin6_family = AF_INET6; 134 dst.sin6_len = sizeof(struct sockaddr_in6); 135 dst.sin6_port = sh->dest_port; 136 dst.sin6_addr = ip6->ip6_dst; 137 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 138 goto out; 139 } 140 length = ntohs(ip6->ip6_plen) + iphlen; 141 /* Validate mbuf chain length with IP payload length. */ 142 if (SCTP_HEADER_LEN(m) != length) { 143 SCTPDBG(SCTP_DEBUG_INPUT1, 144 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 145 SCTP_STAT_INCR(sctps_hdrops); 146 goto out; 147 } 148 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 149 goto out; 150 } 151 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 152 #if defined(SCTP_WITH_NO_CSUM) 153 SCTP_STAT_INCR(sctps_recvnocrc); 154 #else 155 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 156 SCTP_STAT_INCR(sctps_recvhwcrc); 157 compute_crc = 0; 158 } else { 159 SCTP_STAT_INCR(sctps_recvswcrc); 160 compute_crc = 1; 161 } 162 #endif 163 sctp_common_input_processing(&m, iphlen, offset, length, 164 (struct sockaddr *)&src, 165 (struct sockaddr *)&dst, 166 sh, ch, 167 #if !defined(SCTP_WITH_NO_CSUM) 168 compute_crc, 169 #endif 170 ecn_bits, 171 mflowtype, mflowid, fibnum, 172 vrf_id, port); 173 out: 174 if (m) { 175 sctp_m_freem(m); 176 } 177 return (IPPROTO_DONE); 178 } 179 180 181 int 182 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 183 { 184 return (sctp6_input_with_port(i_pak, offp, 0)); 185 } 186 187 void 188 sctp6_notify(struct sctp_inpcb *inp, 189 struct sctp_tcb *stcb, 190 struct sctp_nets *net, 191 uint8_t icmp6_type, 192 uint8_t icmp6_code, 193 uint16_t next_mtu) 194 { 195 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 196 struct socket *so; 197 198 #endif 199 int timer_stopped; 200 201 switch (icmp6_type) { 202 case ICMP6_DST_UNREACH: 203 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || 204 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || 205 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || 206 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { 207 /* Mark the net unreachable. */ 208 if (net->dest_state & SCTP_ADDR_REACHABLE) { 209 /* Ok that destination is not reachable */ 210 net->dest_state &= ~SCTP_ADDR_REACHABLE; 211 net->dest_state &= ~SCTP_ADDR_PF; 212 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 213 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 214 } 215 } 216 SCTP_TCB_UNLOCK(stcb); 217 break; 218 case ICMP6_PARAM_PROB: 219 /* Treat it like an ABORT. */ 220 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { 221 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 222 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 223 so = SCTP_INP_SO(inp); 224 atomic_add_int(&stcb->asoc.refcnt, 1); 225 SCTP_TCB_UNLOCK(stcb); 226 SCTP_SOCKET_LOCK(so, 1); 227 SCTP_TCB_LOCK(stcb); 228 atomic_subtract_int(&stcb->asoc.refcnt, 1); 229 #endif 230 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 231 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 232 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 233 SCTP_SOCKET_UNLOCK(so, 1); 234 #endif 235 } else { 236 SCTP_TCB_UNLOCK(stcb); 237 } 238 break; 239 case ICMP6_PACKET_TOO_BIG: 240 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 241 timer_stopped = 1; 242 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 243 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 244 } else { 245 timer_stopped = 0; 246 } 247 break; 248 /* Update the path MTU. */ 249 if (net->mtu > next_mtu) { 250 net->mtu = next_mtu; 251 if (net->port) { 252 net->mtu -= sizeof(struct udphdr); 253 } 254 } 255 /* Update the association MTU */ 256 if (stcb->asoc.smallest_mtu > next_mtu) { 257 sctp_pathmtu_adjustment(stcb, next_mtu); 258 } 259 /* Finally, start the PMTU timer if it was running before. */ 260 if (timer_stopped) { 261 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 262 } 263 SCTP_TCB_UNLOCK(stcb); 264 break; 265 default: 266 SCTP_TCB_UNLOCK(stcb); 267 break; 268 } 269 } 270 271 void 272 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 273 { 274 struct ip6ctlparam *ip6cp; 275 struct sctp_inpcb *inp; 276 struct sctp_tcb *stcb; 277 struct sctp_nets *net; 278 struct sctphdr sh; 279 struct sockaddr_in6 src, dst; 280 281 if (pktdst->sa_family != AF_INET6 || 282 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 283 return; 284 } 285 if ((unsigned)cmd >= PRC_NCMDS) { 286 return; 287 } 288 if (PRC_IS_REDIRECT(cmd)) { 289 d = NULL; 290 } else if (inet6ctlerrmap[cmd] == 0) { 291 return; 292 } 293 /* If the parameter is from icmp6, decode it. */ 294 if (d != NULL) { 295 ip6cp = (struct ip6ctlparam *)d; 296 } else { 297 ip6cp = (struct ip6ctlparam *)NULL; 298 } 299 300 if (ip6cp != NULL) { 301 /* 302 * XXX: We assume that when IPV6 is non NULL, M and OFF are 303 * valid. 304 */ 305 if (ip6cp->ip6c_m == NULL) { 306 return; 307 } 308 /* 309 * Check if we can safely examine the ports and the 310 * verification tag of the SCTP common header. 311 */ 312 if (ip6cp->ip6c_m->m_pkthdr.len < 313 ip6cp->ip6c_off + offsetof(struct sctphdr, checksum)) { 314 return; 315 } 316 /* Copy out the port numbers and the verification tag. */ 317 bzero(&sh, sizeof(sh)); 318 m_copydata(ip6cp->ip6c_m, 319 ip6cp->ip6c_off, 320 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 321 (caddr_t)&sh); 322 memset(&src, 0, sizeof(struct sockaddr_in6)); 323 src.sin6_family = AF_INET6; 324 src.sin6_len = sizeof(struct sockaddr_in6); 325 src.sin6_port = sh.src_port; 326 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 327 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 328 return; 329 } 330 memset(&dst, 0, sizeof(struct sockaddr_in6)); 331 dst.sin6_family = AF_INET6; 332 dst.sin6_len = sizeof(struct sockaddr_in6); 333 dst.sin6_port = sh.dest_port; 334 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 335 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 336 return; 337 } 338 inp = NULL; 339 net = NULL; 340 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 341 (struct sockaddr *)&src, 342 &inp, &net, 1, SCTP_DEFAULT_VRFID); 343 if ((stcb != NULL) && 344 (net != NULL) && 345 (inp != NULL) && 346 (inp->sctp_socket != NULL)) { 347 /* Check the verification tag */ 348 if (ntohl(sh.v_tag) != 0) { 349 /* 350 * This must be the verification tag used 351 * for sending out packets. We don't 352 * consider packets reflecting the 353 * verification tag. 354 */ 355 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 356 SCTP_TCB_UNLOCK(stcb); 357 return; 358 } 359 } else { 360 if (ip6cp->ip6c_m->m_pkthdr.len >= 361 ip6cp->ip6c_off + sizeof(struct sctphdr) + 362 sizeof(struct sctp_chunkhdr) + 363 offsetof(struct sctp_init, a_rwnd)) { 364 /* 365 * In this case we can check if we 366 * got an INIT chunk and if the 367 * initiate tag matches. 368 */ 369 uint32_t initiate_tag; 370 uint8_t chunk_type; 371 372 m_copydata(ip6cp->ip6c_m, 373 ip6cp->ip6c_off + 374 sizeof(struct sctphdr), 375 sizeof(uint8_t), 376 (caddr_t)&chunk_type); 377 m_copydata(ip6cp->ip6c_m, 378 ip6cp->ip6c_off + 379 sizeof(struct sctphdr) + 380 sizeof(struct sctp_chunkhdr), 381 sizeof(uint32_t), 382 (caddr_t)&initiate_tag); 383 if ((chunk_type != SCTP_INITIATION) || 384 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 385 SCTP_TCB_UNLOCK(stcb); 386 return; 387 } 388 } else { 389 SCTP_TCB_UNLOCK(stcb); 390 return; 391 } 392 } 393 sctp6_notify(inp, stcb, net, 394 ip6cp->ip6c_icmp6->icmp6_type, 395 ip6cp->ip6c_icmp6->icmp6_code, 396 (uint16_t) ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 397 } else { 398 if ((stcb == NULL) && (inp != NULL)) { 399 /* reduce inp's ref-count */ 400 SCTP_INP_WLOCK(inp); 401 SCTP_INP_DECR_REF(inp); 402 SCTP_INP_WUNLOCK(inp); 403 } 404 if (stcb) { 405 SCTP_TCB_UNLOCK(stcb); 406 } 407 } 408 } 409 } 410 411 /* 412 * this routine can probably be collasped into the one in sctp_userreq.c 413 * since they do the same thing and now we lookup with a sockaddr 414 */ 415 static int 416 sctp6_getcred(SYSCTL_HANDLER_ARGS) 417 { 418 struct xucred xuc; 419 struct sockaddr_in6 addrs[2]; 420 struct sctp_inpcb *inp; 421 struct sctp_nets *net; 422 struct sctp_tcb *stcb; 423 int error; 424 uint32_t vrf_id; 425 426 vrf_id = SCTP_DEFAULT_VRFID; 427 428 error = priv_check(req->td, PRIV_NETINET_GETCRED); 429 if (error) 430 return (error); 431 432 if (req->newlen != sizeof(addrs)) { 433 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 434 return (EINVAL); 435 } 436 if (req->oldlen != sizeof(struct ucred)) { 437 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 438 return (EINVAL); 439 } 440 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 441 if (error) 442 return (error); 443 444 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 445 sin6tosa(&addrs[0]), 446 &inp, &net, 1, vrf_id); 447 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 448 if ((inp != NULL) && (stcb == NULL)) { 449 /* reduce ref-count */ 450 SCTP_INP_WLOCK(inp); 451 SCTP_INP_DECR_REF(inp); 452 goto cred_can_cont; 453 } 454 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 455 error = ENOENT; 456 goto out; 457 } 458 SCTP_TCB_UNLOCK(stcb); 459 /* 460 * We use the write lock here, only since in the error leg we need 461 * it. If we used RLOCK, then we would have to 462 * wlock/decr/unlock/rlock. Which in theory could create a hole. 463 * Better to use higher wlock. 464 */ 465 SCTP_INP_WLOCK(inp); 466 cred_can_cont: 467 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 468 if (error) { 469 SCTP_INP_WUNLOCK(inp); 470 goto out; 471 } 472 cru2x(inp->sctp_socket->so_cred, &xuc); 473 SCTP_INP_WUNLOCK(inp); 474 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 475 out: 476 return (error); 477 } 478 479 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 480 0, 0, 481 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 482 483 484 /* This is the same as the sctp_abort() could be made common */ 485 static void 486 sctp6_abort(struct socket *so) 487 { 488 struct sctp_inpcb *inp; 489 uint32_t flags; 490 491 inp = (struct sctp_inpcb *)so->so_pcb; 492 if (inp == NULL) { 493 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 494 return; 495 } 496 sctp_must_try_again: 497 flags = inp->sctp_flags; 498 #ifdef SCTP_LOG_CLOSING 499 sctp_log_closing(inp, NULL, 17); 500 #endif 501 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 502 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 503 #ifdef SCTP_LOG_CLOSING 504 sctp_log_closing(inp, NULL, 16); 505 #endif 506 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 507 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 508 SOCK_LOCK(so); 509 SCTP_SB_CLEAR(so->so_snd); 510 /* 511 * same for the rcv ones, they are only here for the 512 * accounting/select. 513 */ 514 SCTP_SB_CLEAR(so->so_rcv); 515 /* Now null out the reference, we are completely detached. */ 516 so->so_pcb = NULL; 517 SOCK_UNLOCK(so); 518 } else { 519 flags = inp->sctp_flags; 520 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 521 goto sctp_must_try_again; 522 } 523 } 524 return; 525 } 526 527 static int 528 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 529 { 530 struct in6pcb *inp6; 531 int error; 532 struct sctp_inpcb *inp; 533 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 534 535 inp = (struct sctp_inpcb *)so->so_pcb; 536 if (inp != NULL) { 537 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 538 return (EINVAL); 539 } 540 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 541 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 542 if (error) 543 return (error); 544 } 545 error = sctp_inpcb_alloc(so, vrf_id); 546 if (error) 547 return (error); 548 inp = (struct sctp_inpcb *)so->so_pcb; 549 SCTP_INP_WLOCK(inp); 550 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 551 inp6 = (struct in6pcb *)inp; 552 553 inp6->inp_vflag |= INP_IPV6; 554 inp6->in6p_hops = -1; /* use kernel default */ 555 inp6->in6p_cksum = -1; /* just to be sure */ 556 #ifdef INET 557 /* 558 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 559 * socket as well, because the socket may be bound to an IPv6 560 * wildcard address, which may match an IPv4-mapped IPv6 address. 561 */ 562 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 563 #endif 564 /* 565 * Hmm what about the IPSEC stuff that is missing here but in 566 * sctp_attach()? 567 */ 568 SCTP_INP_WUNLOCK(inp); 569 return (0); 570 } 571 572 static int 573 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 574 { 575 struct sctp_inpcb *inp; 576 struct in6pcb *inp6; 577 int error; 578 579 inp = (struct sctp_inpcb *)so->so_pcb; 580 if (inp == NULL) { 581 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 582 return (EINVAL); 583 } 584 if (addr) { 585 switch (addr->sa_family) { 586 #ifdef INET 587 case AF_INET: 588 if (addr->sa_len != sizeof(struct sockaddr_in)) { 589 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 590 return (EINVAL); 591 } 592 break; 593 #endif 594 #ifdef INET6 595 case AF_INET6: 596 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 597 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 598 return (EINVAL); 599 } 600 break; 601 #endif 602 default: 603 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 604 return (EINVAL); 605 } 606 } 607 inp6 = (struct in6pcb *)inp; 608 inp6->inp_vflag &= ~INP_IPV4; 609 inp6->inp_vflag |= INP_IPV6; 610 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 611 switch (addr->sa_family) { 612 #ifdef INET 613 case AF_INET: 614 /* binding v4 addr to v6 socket, so reset flags */ 615 inp6->inp_vflag |= INP_IPV4; 616 inp6->inp_vflag &= ~INP_IPV6; 617 break; 618 #endif 619 #ifdef INET6 620 case AF_INET6: 621 { 622 struct sockaddr_in6 *sin6_p; 623 624 sin6_p = (struct sockaddr_in6 *)addr; 625 626 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 627 inp6->inp_vflag |= INP_IPV4; 628 } 629 #ifdef INET 630 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 631 struct sockaddr_in sin; 632 633 in6_sin6_2_sin(&sin, sin6_p); 634 inp6->inp_vflag |= INP_IPV4; 635 inp6->inp_vflag &= ~INP_IPV6; 636 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 637 return (error); 638 } 639 #endif 640 break; 641 } 642 #endif 643 default: 644 break; 645 } 646 } else if (addr != NULL) { 647 struct sockaddr_in6 *sin6_p; 648 649 /* IPV6_V6ONLY socket */ 650 #ifdef INET 651 if (addr->sa_family == AF_INET) { 652 /* can't bind v4 addr to v6 only socket! */ 653 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 654 return (EINVAL); 655 } 656 #endif 657 sin6_p = (struct sockaddr_in6 *)addr; 658 659 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 660 /* can't bind v4-mapped addrs either! */ 661 /* NOTE: we don't support SIIT */ 662 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 663 return (EINVAL); 664 } 665 } 666 error = sctp_inpcb_bind(so, addr, NULL, p); 667 return (error); 668 } 669 670 671 static void 672 sctp6_close(struct socket *so) 673 { 674 sctp_close(so); 675 } 676 677 /* This could be made common with sctp_detach() since they are identical */ 678 679 static 680 int 681 sctp6_disconnect(struct socket *so) 682 { 683 return (sctp_disconnect(so)); 684 } 685 686 687 int 688 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 689 struct mbuf *control, struct thread *p); 690 691 692 static int 693 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 694 struct mbuf *control, struct thread *p) 695 { 696 struct sctp_inpcb *inp; 697 struct in6pcb *inp6; 698 699 #ifdef INET 700 struct sockaddr_in6 *sin6; 701 702 #endif /* INET */ 703 /* No SPL needed since sctp_output does this */ 704 705 inp = (struct sctp_inpcb *)so->so_pcb; 706 if (inp == NULL) { 707 if (control) { 708 SCTP_RELEASE_PKT(control); 709 control = NULL; 710 } 711 SCTP_RELEASE_PKT(m); 712 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 713 return (EINVAL); 714 } 715 inp6 = (struct in6pcb *)inp; 716 /* 717 * For the TCP model we may get a NULL addr, if we are a connected 718 * socket thats ok. 719 */ 720 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 721 (addr == NULL)) { 722 goto connected_type; 723 } 724 if (addr == NULL) { 725 SCTP_RELEASE_PKT(m); 726 if (control) { 727 SCTP_RELEASE_PKT(control); 728 control = NULL; 729 } 730 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 731 return (EDESTADDRREQ); 732 } 733 #ifdef INET 734 sin6 = (struct sockaddr_in6 *)addr; 735 if (SCTP_IPV6_V6ONLY(inp6)) { 736 /* 737 * if IPV6_V6ONLY flag, we discard datagrams destined to a 738 * v4 addr or v4-mapped addr 739 */ 740 if (addr->sa_family == AF_INET) { 741 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 742 return (EINVAL); 743 } 744 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 745 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 746 return (EINVAL); 747 } 748 } 749 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 750 struct sockaddr_in sin; 751 752 /* convert v4-mapped into v4 addr and send */ 753 in6_sin6_2_sin(&sin, sin6); 754 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 755 } 756 #endif /* INET */ 757 connected_type: 758 /* now what about control */ 759 if (control) { 760 if (inp->control) { 761 SCTP_PRINTF("huh? control set?\n"); 762 SCTP_RELEASE_PKT(inp->control); 763 inp->control = NULL; 764 } 765 inp->control = control; 766 } 767 /* Place the data */ 768 if (inp->pkt) { 769 SCTP_BUF_NEXT(inp->pkt_last) = m; 770 inp->pkt_last = m; 771 } else { 772 inp->pkt_last = inp->pkt = m; 773 } 774 if ( 775 /* FreeBSD and MacOSX uses a flag passed */ 776 ((flags & PRUS_MORETOCOME) == 0) 777 ) { 778 /* 779 * note with the current version this code will only be used 780 * by OpenBSD, NetBSD and FreeBSD have methods for 781 * re-defining sosend() to use sctp_sosend(). One can 782 * optionaly switch back to this code (by changing back the 783 * defininitions but this is not advisable. 784 */ 785 int ret; 786 787 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 788 inp->pkt = NULL; 789 inp->control = NULL; 790 return (ret); 791 } else { 792 return (0); 793 } 794 } 795 796 static int 797 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 798 { 799 uint32_t vrf_id; 800 int error = 0; 801 struct sctp_inpcb *inp; 802 struct sctp_tcb *stcb; 803 804 #ifdef INET 805 struct in6pcb *inp6; 806 struct sockaddr_in6 *sin6; 807 union sctp_sockstore store; 808 809 #endif 810 811 #ifdef INET 812 inp6 = (struct in6pcb *)so->so_pcb; 813 #endif 814 inp = (struct sctp_inpcb *)so->so_pcb; 815 if (inp == NULL) { 816 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 817 return (ECONNRESET); /* I made the same as TCP since we are 818 * not setup? */ 819 } 820 if (addr == NULL) { 821 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 822 return (EINVAL); 823 } 824 switch (addr->sa_family) { 825 #ifdef INET 826 case AF_INET: 827 if (addr->sa_len != sizeof(struct sockaddr_in)) { 828 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 829 return (EINVAL); 830 } 831 break; 832 #endif 833 #ifdef INET6 834 case AF_INET6: 835 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 836 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 837 return (EINVAL); 838 } 839 break; 840 #endif 841 default: 842 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 843 return (EINVAL); 844 } 845 846 vrf_id = inp->def_vrf_id; 847 SCTP_ASOC_CREATE_LOCK(inp); 848 SCTP_INP_RLOCK(inp); 849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 850 SCTP_PCB_FLAGS_UNBOUND) { 851 /* Bind a ephemeral port */ 852 SCTP_INP_RUNLOCK(inp); 853 error = sctp6_bind(so, NULL, p); 854 if (error) { 855 SCTP_ASOC_CREATE_UNLOCK(inp); 856 857 return (error); 858 } 859 SCTP_INP_RLOCK(inp); 860 } 861 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 862 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 863 /* We are already connected AND the TCP model */ 864 SCTP_INP_RUNLOCK(inp); 865 SCTP_ASOC_CREATE_UNLOCK(inp); 866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 867 return (EADDRINUSE); 868 } 869 #ifdef INET 870 sin6 = (struct sockaddr_in6 *)addr; 871 if (SCTP_IPV6_V6ONLY(inp6)) { 872 /* 873 * if IPV6_V6ONLY flag, ignore connections destined to a v4 874 * addr or v4-mapped addr 875 */ 876 if (addr->sa_family == AF_INET) { 877 SCTP_INP_RUNLOCK(inp); 878 SCTP_ASOC_CREATE_UNLOCK(inp); 879 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 880 return (EINVAL); 881 } 882 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 883 SCTP_INP_RUNLOCK(inp); 884 SCTP_ASOC_CREATE_UNLOCK(inp); 885 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 886 return (EINVAL); 887 } 888 } 889 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 890 /* convert v4-mapped into v4 addr */ 891 in6_sin6_2_sin(&store.sin, sin6); 892 addr = &store.sa; 893 } 894 #endif /* INET */ 895 /* Now do we connect? */ 896 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 897 stcb = LIST_FIRST(&inp->sctp_asoc_list); 898 if (stcb) { 899 SCTP_TCB_UNLOCK(stcb); 900 } 901 SCTP_INP_RUNLOCK(inp); 902 } else { 903 SCTP_INP_RUNLOCK(inp); 904 SCTP_INP_WLOCK(inp); 905 SCTP_INP_INCR_REF(inp); 906 SCTP_INP_WUNLOCK(inp); 907 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 908 if (stcb == NULL) { 909 SCTP_INP_WLOCK(inp); 910 SCTP_INP_DECR_REF(inp); 911 SCTP_INP_WUNLOCK(inp); 912 } 913 } 914 915 if (stcb != NULL) { 916 /* Already have or am bring up an association */ 917 SCTP_ASOC_CREATE_UNLOCK(inp); 918 SCTP_TCB_UNLOCK(stcb); 919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 920 return (EALREADY); 921 } 922 /* We are GOOD to go */ 923 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, p); 924 SCTP_ASOC_CREATE_UNLOCK(inp); 925 if (stcb == NULL) { 926 /* Gak! no memory */ 927 return (error); 928 } 929 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 930 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 931 /* Set the connected flag so we can queue data */ 932 soisconnecting(so); 933 } 934 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 935 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 936 937 /* initialize authentication parameters for the assoc */ 938 sctp_initialize_auth_params(inp, stcb); 939 940 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 941 SCTP_TCB_UNLOCK(stcb); 942 return (error); 943 } 944 945 static int 946 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 947 { 948 struct sockaddr_in6 *sin6; 949 struct sctp_inpcb *inp; 950 uint32_t vrf_id; 951 struct sctp_ifa *sctp_ifa; 952 953 int error; 954 955 /* 956 * Do the malloc first in case it blocks. 957 */ 958 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 959 if (sin6 == NULL) 960 return (ENOMEM); 961 sin6->sin6_family = AF_INET6; 962 sin6->sin6_len = sizeof(*sin6); 963 964 inp = (struct sctp_inpcb *)so->so_pcb; 965 if (inp == NULL) { 966 SCTP_FREE_SONAME(sin6); 967 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 968 return (ECONNRESET); 969 } 970 SCTP_INP_RLOCK(inp); 971 sin6->sin6_port = inp->sctp_lport; 972 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 973 /* For the bound all case you get back 0 */ 974 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 975 struct sctp_tcb *stcb; 976 struct sockaddr_in6 *sin_a6; 977 struct sctp_nets *net; 978 int fnd; 979 980 stcb = LIST_FIRST(&inp->sctp_asoc_list); 981 if (stcb == NULL) { 982 SCTP_INP_RUNLOCK(inp); 983 SCTP_FREE_SONAME(sin6); 984 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 985 return (ENOENT); 986 } 987 fnd = 0; 988 sin_a6 = NULL; 989 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 990 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 991 if (sin_a6 == NULL) 992 /* this will make coverity happy */ 993 continue; 994 995 if (sin_a6->sin6_family == AF_INET6) { 996 fnd = 1; 997 break; 998 } 999 } 1000 if ((!fnd) || (sin_a6 == NULL)) { 1001 /* punt */ 1002 SCTP_INP_RUNLOCK(inp); 1003 SCTP_FREE_SONAME(sin6); 1004 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1005 return (ENOENT); 1006 } 1007 vrf_id = inp->def_vrf_id; 1008 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1009 if (sctp_ifa) { 1010 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1011 } 1012 } else { 1013 /* For the bound all case you get back 0 */ 1014 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1015 } 1016 } else { 1017 /* Take the first IPv6 address in the list */ 1018 struct sctp_laddr *laddr; 1019 int fnd = 0; 1020 1021 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1022 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1023 struct sockaddr_in6 *sin_a; 1024 1025 sin_a = &laddr->ifa->address.sin6; 1026 sin6->sin6_addr = sin_a->sin6_addr; 1027 fnd = 1; 1028 break; 1029 } 1030 } 1031 if (!fnd) { 1032 SCTP_FREE_SONAME(sin6); 1033 SCTP_INP_RUNLOCK(inp); 1034 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1035 return (ENOENT); 1036 } 1037 } 1038 SCTP_INP_RUNLOCK(inp); 1039 /* Scoping things for v6 */ 1040 if ((error = sa6_recoverscope(sin6)) != 0) { 1041 SCTP_FREE_SONAME(sin6); 1042 return (error); 1043 } 1044 (*addr) = (struct sockaddr *)sin6; 1045 return (0); 1046 } 1047 1048 static int 1049 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1050 { 1051 struct sockaddr_in6 *sin6; 1052 int fnd; 1053 struct sockaddr_in6 *sin_a6; 1054 struct sctp_inpcb *inp; 1055 struct sctp_tcb *stcb; 1056 struct sctp_nets *net; 1057 int error; 1058 1059 /* Do the malloc first in case it blocks. */ 1060 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1061 if (sin6 == NULL) 1062 return (ENOMEM); 1063 sin6->sin6_family = AF_INET6; 1064 sin6->sin6_len = sizeof(*sin6); 1065 1066 inp = (struct sctp_inpcb *)so->so_pcb; 1067 if ((inp == NULL) || 1068 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1069 /* UDP type and listeners will drop out here */ 1070 SCTP_FREE_SONAME(sin6); 1071 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1072 return (ENOTCONN); 1073 } 1074 SCTP_INP_RLOCK(inp); 1075 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1076 if (stcb) { 1077 SCTP_TCB_LOCK(stcb); 1078 } 1079 SCTP_INP_RUNLOCK(inp); 1080 if (stcb == NULL) { 1081 SCTP_FREE_SONAME(sin6); 1082 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1083 return (ECONNRESET); 1084 } 1085 fnd = 0; 1086 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1087 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1088 if (sin_a6->sin6_family == AF_INET6) { 1089 fnd = 1; 1090 sin6->sin6_port = stcb->rport; 1091 sin6->sin6_addr = sin_a6->sin6_addr; 1092 break; 1093 } 1094 } 1095 SCTP_TCB_UNLOCK(stcb); 1096 if (!fnd) { 1097 /* No IPv4 address */ 1098 SCTP_FREE_SONAME(sin6); 1099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1100 return (ENOENT); 1101 } 1102 if ((error = sa6_recoverscope(sin6)) != 0) { 1103 SCTP_FREE_SONAME(sin6); 1104 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1105 return (error); 1106 } 1107 *addr = (struct sockaddr *)sin6; 1108 return (0); 1109 } 1110 1111 static int 1112 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1113 { 1114 struct in6pcb *inp6 = sotoin6pcb(so); 1115 int error; 1116 1117 if (inp6 == NULL) { 1118 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1119 return (EINVAL); 1120 } 1121 /* allow v6 addresses precedence */ 1122 error = sctp6_getaddr(so, nam); 1123 #ifdef INET 1124 if (error) { 1125 struct sockaddr_in6 *sin6; 1126 1127 /* try v4 next if v6 failed */ 1128 error = sctp_ingetaddr(so, nam); 1129 if (error) { 1130 return (error); 1131 } 1132 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1133 if (sin6 == NULL) { 1134 SCTP_FREE_SONAME(*nam); 1135 return (ENOMEM); 1136 } 1137 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1138 SCTP_FREE_SONAME(*nam); 1139 *nam = (struct sockaddr *)sin6; 1140 } 1141 #endif 1142 return (error); 1143 } 1144 1145 1146 static int 1147 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1148 { 1149 struct in6pcb *inp6 = sotoin6pcb(so); 1150 int error; 1151 1152 if (inp6 == NULL) { 1153 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1154 return (EINVAL); 1155 } 1156 /* allow v6 addresses precedence */ 1157 error = sctp6_peeraddr(so, nam); 1158 #ifdef INET 1159 if (error) { 1160 struct sockaddr_in6 *sin6; 1161 1162 /* try v4 next if v6 failed */ 1163 error = sctp_peeraddr(so, nam); 1164 if (error) { 1165 return (error); 1166 } 1167 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1168 if (sin6 == NULL) { 1169 SCTP_FREE_SONAME(*nam); 1170 return (ENOMEM); 1171 } 1172 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1173 SCTP_FREE_SONAME(*nam); 1174 *nam = (struct sockaddr *)sin6; 1175 } 1176 #endif 1177 return (error); 1178 } 1179 1180 struct pr_usrreqs sctp6_usrreqs = { 1181 .pru_abort = sctp6_abort, 1182 .pru_accept = sctp_accept, 1183 .pru_attach = sctp6_attach, 1184 .pru_bind = sctp6_bind, 1185 .pru_connect = sctp6_connect, 1186 .pru_control = in6_control, 1187 .pru_close = sctp6_close, 1188 .pru_detach = sctp6_close, 1189 .pru_sopoll = sopoll_generic, 1190 .pru_flush = sctp_flush, 1191 .pru_disconnect = sctp6_disconnect, 1192 .pru_listen = sctp_listen, 1193 .pru_peeraddr = sctp6_getpeeraddr, 1194 .pru_send = sctp6_send, 1195 .pru_shutdown = sctp_shutdown, 1196 .pru_sockaddr = sctp6_in6getaddr, 1197 .pru_sosend = sctp_sosend, 1198 .pru_soreceive = sctp_soreceive 1199 }; 1200 1201 #endif 1202