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 /* Update the path MTU. */ 248 if (net->mtu > next_mtu) { 249 net->mtu = next_mtu; 250 if (net->port) { 251 net->mtu -= sizeof(struct udphdr); 252 } 253 } 254 /* Update the association MTU */ 255 if (stcb->asoc.smallest_mtu > next_mtu) { 256 sctp_pathmtu_adjustment(stcb, next_mtu); 257 } 258 /* Finally, start the PMTU timer if it was running before. */ 259 if (timer_stopped) { 260 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 261 } 262 SCTP_TCB_UNLOCK(stcb); 263 break; 264 default: 265 SCTP_TCB_UNLOCK(stcb); 266 break; 267 } 268 } 269 270 void 271 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 272 { 273 struct ip6ctlparam *ip6cp; 274 struct sctp_inpcb *inp; 275 struct sctp_tcb *stcb; 276 struct sctp_nets *net; 277 struct sctphdr sh; 278 struct sockaddr_in6 src, dst; 279 280 if (pktdst->sa_family != AF_INET6 || 281 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 282 return; 283 } 284 if ((unsigned)cmd >= PRC_NCMDS) { 285 return; 286 } 287 if (PRC_IS_REDIRECT(cmd)) { 288 d = NULL; 289 } else if (inet6ctlerrmap[cmd] == 0) { 290 return; 291 } 292 /* If the parameter is from icmp6, decode it. */ 293 if (d != NULL) { 294 ip6cp = (struct ip6ctlparam *)d; 295 } else { 296 ip6cp = (struct ip6ctlparam *)NULL; 297 } 298 299 if (ip6cp != NULL) { 300 /* 301 * XXX: We assume that when IPV6 is non NULL, M and OFF are 302 * valid. 303 */ 304 if (ip6cp->ip6c_m == NULL) { 305 return; 306 } 307 /* 308 * Check if we can safely examine the ports and the 309 * verification tag of the SCTP common header. 310 */ 311 if (ip6cp->ip6c_m->m_pkthdr.len < 312 (int32_t) (ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 313 return; 314 } 315 /* Copy out the port numbers and the verification tag. */ 316 bzero(&sh, sizeof(sh)); 317 m_copydata(ip6cp->ip6c_m, 318 ip6cp->ip6c_off, 319 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 320 (caddr_t)&sh); 321 memset(&src, 0, sizeof(struct sockaddr_in6)); 322 src.sin6_family = AF_INET6; 323 src.sin6_len = sizeof(struct sockaddr_in6); 324 src.sin6_port = sh.src_port; 325 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 326 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 327 return; 328 } 329 memset(&dst, 0, sizeof(struct sockaddr_in6)); 330 dst.sin6_family = AF_INET6; 331 dst.sin6_len = sizeof(struct sockaddr_in6); 332 dst.sin6_port = sh.dest_port; 333 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 334 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 335 return; 336 } 337 inp = NULL; 338 net = NULL; 339 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 340 (struct sockaddr *)&src, 341 &inp, &net, 1, SCTP_DEFAULT_VRFID); 342 if ((stcb != NULL) && 343 (net != NULL) && 344 (inp != NULL) && 345 (inp->sctp_socket != NULL)) { 346 /* Check the verification tag */ 347 if (ntohl(sh.v_tag) != 0) { 348 /* 349 * This must be the verification tag used 350 * for sending out packets. We don't 351 * consider packets reflecting the 352 * verification tag. 353 */ 354 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 355 SCTP_TCB_UNLOCK(stcb); 356 return; 357 } 358 } else { 359 if (ip6cp->ip6c_m->m_pkthdr.len >= 360 ip6cp->ip6c_off + sizeof(struct sctphdr) + 361 sizeof(struct sctp_chunkhdr) + 362 offsetof(struct sctp_init, a_rwnd)) { 363 /* 364 * In this case we can check if we 365 * got an INIT chunk and if the 366 * initiate tag matches. 367 */ 368 uint32_t initiate_tag; 369 uint8_t chunk_type; 370 371 m_copydata(ip6cp->ip6c_m, 372 ip6cp->ip6c_off + 373 sizeof(struct sctphdr), 374 sizeof(uint8_t), 375 (caddr_t)&chunk_type); 376 m_copydata(ip6cp->ip6c_m, 377 ip6cp->ip6c_off + 378 sizeof(struct sctphdr) + 379 sizeof(struct sctp_chunkhdr), 380 sizeof(uint32_t), 381 (caddr_t)&initiate_tag); 382 if ((chunk_type != SCTP_INITIATION) || 383 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 384 SCTP_TCB_UNLOCK(stcb); 385 return; 386 } 387 } else { 388 SCTP_TCB_UNLOCK(stcb); 389 return; 390 } 391 } 392 sctp6_notify(inp, stcb, net, 393 ip6cp->ip6c_icmp6->icmp6_type, 394 ip6cp->ip6c_icmp6->icmp6_code, 395 (uint16_t) ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 396 } else { 397 if ((stcb == NULL) && (inp != NULL)) { 398 /* reduce inp's ref-count */ 399 SCTP_INP_WLOCK(inp); 400 SCTP_INP_DECR_REF(inp); 401 SCTP_INP_WUNLOCK(inp); 402 } 403 if (stcb) { 404 SCTP_TCB_UNLOCK(stcb); 405 } 406 } 407 } 408 } 409 410 /* 411 * this routine can probably be collasped into the one in sctp_userreq.c 412 * since they do the same thing and now we lookup with a sockaddr 413 */ 414 static int 415 sctp6_getcred(SYSCTL_HANDLER_ARGS) 416 { 417 struct xucred xuc; 418 struct sockaddr_in6 addrs[2]; 419 struct sctp_inpcb *inp; 420 struct sctp_nets *net; 421 struct sctp_tcb *stcb; 422 int error; 423 uint32_t vrf_id; 424 425 vrf_id = SCTP_DEFAULT_VRFID; 426 427 error = priv_check(req->td, PRIV_NETINET_GETCRED); 428 if (error) 429 return (error); 430 431 if (req->newlen != sizeof(addrs)) { 432 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 433 return (EINVAL); 434 } 435 if (req->oldlen != sizeof(struct ucred)) { 436 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 437 return (EINVAL); 438 } 439 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 440 if (error) 441 return (error); 442 443 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 444 sin6tosa(&addrs[0]), 445 &inp, &net, 1, vrf_id); 446 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 447 if ((inp != NULL) && (stcb == NULL)) { 448 /* reduce ref-count */ 449 SCTP_INP_WLOCK(inp); 450 SCTP_INP_DECR_REF(inp); 451 goto cred_can_cont; 452 } 453 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 454 error = ENOENT; 455 goto out; 456 } 457 SCTP_TCB_UNLOCK(stcb); 458 /* 459 * We use the write lock here, only since in the error leg we need 460 * it. If we used RLOCK, then we would have to 461 * wlock/decr/unlock/rlock. Which in theory could create a hole. 462 * Better to use higher wlock. 463 */ 464 SCTP_INP_WLOCK(inp); 465 cred_can_cont: 466 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 467 if (error) { 468 SCTP_INP_WUNLOCK(inp); 469 goto out; 470 } 471 cru2x(inp->sctp_socket->so_cred, &xuc); 472 SCTP_INP_WUNLOCK(inp); 473 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 474 out: 475 return (error); 476 } 477 478 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 479 0, 0, 480 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 481 482 483 /* This is the same as the sctp_abort() could be made common */ 484 static void 485 sctp6_abort(struct socket *so) 486 { 487 struct sctp_inpcb *inp; 488 uint32_t flags; 489 490 inp = (struct sctp_inpcb *)so->so_pcb; 491 if (inp == NULL) { 492 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 493 return; 494 } 495 sctp_must_try_again: 496 flags = inp->sctp_flags; 497 #ifdef SCTP_LOG_CLOSING 498 sctp_log_closing(inp, NULL, 17); 499 #endif 500 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 501 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 502 #ifdef SCTP_LOG_CLOSING 503 sctp_log_closing(inp, NULL, 16); 504 #endif 505 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 506 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 507 SOCK_LOCK(so); 508 SCTP_SB_CLEAR(so->so_snd); 509 /* 510 * same for the rcv ones, they are only here for the 511 * accounting/select. 512 */ 513 SCTP_SB_CLEAR(so->so_rcv); 514 /* Now null out the reference, we are completely detached. */ 515 so->so_pcb = NULL; 516 SOCK_UNLOCK(so); 517 } else { 518 flags = inp->sctp_flags; 519 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 520 goto sctp_must_try_again; 521 } 522 } 523 return; 524 } 525 526 static int 527 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 528 { 529 struct in6pcb *inp6; 530 int error; 531 struct sctp_inpcb *inp; 532 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 533 534 inp = (struct sctp_inpcb *)so->so_pcb; 535 if (inp != NULL) { 536 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 537 return (EINVAL); 538 } 539 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 540 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 541 if (error) 542 return (error); 543 } 544 error = sctp_inpcb_alloc(so, vrf_id); 545 if (error) 546 return (error); 547 inp = (struct sctp_inpcb *)so->so_pcb; 548 SCTP_INP_WLOCK(inp); 549 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 550 inp6 = (struct in6pcb *)inp; 551 552 inp6->inp_vflag |= INP_IPV6; 553 inp6->in6p_hops = -1; /* use kernel default */ 554 inp6->in6p_cksum = -1; /* just to be sure */ 555 #ifdef INET 556 /* 557 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 558 * socket as well, because the socket may be bound to an IPv6 559 * wildcard address, which may match an IPv4-mapped IPv6 address. 560 */ 561 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 562 #endif 563 /* 564 * Hmm what about the IPSEC stuff that is missing here but in 565 * sctp_attach()? 566 */ 567 SCTP_INP_WUNLOCK(inp); 568 return (0); 569 } 570 571 static int 572 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 573 { 574 struct sctp_inpcb *inp; 575 struct in6pcb *inp6; 576 int error; 577 578 inp = (struct sctp_inpcb *)so->so_pcb; 579 if (inp == NULL) { 580 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 581 return (EINVAL); 582 } 583 if (addr) { 584 switch (addr->sa_family) { 585 #ifdef INET 586 case AF_INET: 587 if (addr->sa_len != sizeof(struct sockaddr_in)) { 588 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 589 return (EINVAL); 590 } 591 break; 592 #endif 593 #ifdef INET6 594 case AF_INET6: 595 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 596 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 597 return (EINVAL); 598 } 599 break; 600 #endif 601 default: 602 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 603 return (EINVAL); 604 } 605 } 606 inp6 = (struct in6pcb *)inp; 607 inp6->inp_vflag &= ~INP_IPV4; 608 inp6->inp_vflag |= INP_IPV6; 609 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 610 switch (addr->sa_family) { 611 #ifdef INET 612 case AF_INET: 613 /* binding v4 addr to v6 socket, so reset flags */ 614 inp6->inp_vflag |= INP_IPV4; 615 inp6->inp_vflag &= ~INP_IPV6; 616 break; 617 #endif 618 #ifdef INET6 619 case AF_INET6: 620 { 621 struct sockaddr_in6 *sin6_p; 622 623 sin6_p = (struct sockaddr_in6 *)addr; 624 625 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 626 inp6->inp_vflag |= INP_IPV4; 627 } 628 #ifdef INET 629 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 630 struct sockaddr_in sin; 631 632 in6_sin6_2_sin(&sin, sin6_p); 633 inp6->inp_vflag |= INP_IPV4; 634 inp6->inp_vflag &= ~INP_IPV6; 635 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 636 return (error); 637 } 638 #endif 639 break; 640 } 641 #endif 642 default: 643 break; 644 } 645 } else if (addr != NULL) { 646 struct sockaddr_in6 *sin6_p; 647 648 /* IPV6_V6ONLY socket */ 649 #ifdef INET 650 if (addr->sa_family == AF_INET) { 651 /* can't bind v4 addr to v6 only socket! */ 652 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 653 return (EINVAL); 654 } 655 #endif 656 sin6_p = (struct sockaddr_in6 *)addr; 657 658 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 659 /* can't bind v4-mapped addrs either! */ 660 /* NOTE: we don't support SIIT */ 661 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 662 return (EINVAL); 663 } 664 } 665 error = sctp_inpcb_bind(so, addr, NULL, p); 666 return (error); 667 } 668 669 670 static void 671 sctp6_close(struct socket *so) 672 { 673 sctp_close(so); 674 } 675 676 /* This could be made common with sctp_detach() since they are identical */ 677 678 static 679 int 680 sctp6_disconnect(struct socket *so) 681 { 682 return (sctp_disconnect(so)); 683 } 684 685 686 int 687 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 688 struct mbuf *control, struct thread *p); 689 690 691 static int 692 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 693 struct mbuf *control, struct thread *p) 694 { 695 struct sctp_inpcb *inp; 696 struct in6pcb *inp6; 697 698 #ifdef INET 699 struct sockaddr_in6 *sin6; 700 701 #endif /* INET */ 702 /* No SPL needed since sctp_output does this */ 703 704 inp = (struct sctp_inpcb *)so->so_pcb; 705 if (inp == NULL) { 706 if (control) { 707 SCTP_RELEASE_PKT(control); 708 control = NULL; 709 } 710 SCTP_RELEASE_PKT(m); 711 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 712 return (EINVAL); 713 } 714 inp6 = (struct in6pcb *)inp; 715 /* 716 * For the TCP model we may get a NULL addr, if we are a connected 717 * socket thats ok. 718 */ 719 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 720 (addr == NULL)) { 721 goto connected_type; 722 } 723 if (addr == NULL) { 724 SCTP_RELEASE_PKT(m); 725 if (control) { 726 SCTP_RELEASE_PKT(control); 727 control = NULL; 728 } 729 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 730 return (EDESTADDRREQ); 731 } 732 #ifdef INET 733 sin6 = (struct sockaddr_in6 *)addr; 734 if (SCTP_IPV6_V6ONLY(inp6)) { 735 /* 736 * if IPV6_V6ONLY flag, we discard datagrams destined to a 737 * v4 addr or v4-mapped addr 738 */ 739 if (addr->sa_family == AF_INET) { 740 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 741 return (EINVAL); 742 } 743 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 744 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 745 return (EINVAL); 746 } 747 } 748 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 749 struct sockaddr_in sin; 750 751 /* convert v4-mapped into v4 addr and send */ 752 in6_sin6_2_sin(&sin, sin6); 753 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 754 } 755 #endif /* INET */ 756 connected_type: 757 /* now what about control */ 758 if (control) { 759 if (inp->control) { 760 SCTP_PRINTF("huh? control set?\n"); 761 SCTP_RELEASE_PKT(inp->control); 762 inp->control = NULL; 763 } 764 inp->control = control; 765 } 766 /* Place the data */ 767 if (inp->pkt) { 768 SCTP_BUF_NEXT(inp->pkt_last) = m; 769 inp->pkt_last = m; 770 } else { 771 inp->pkt_last = inp->pkt = m; 772 } 773 if ( 774 /* FreeBSD and MacOSX uses a flag passed */ 775 ((flags & PRUS_MORETOCOME) == 0) 776 ) { 777 /* 778 * note with the current version this code will only be used 779 * by OpenBSD, NetBSD and FreeBSD have methods for 780 * re-defining sosend() to use sctp_sosend(). One can 781 * optionaly switch back to this code (by changing back the 782 * defininitions but this is not advisable. 783 */ 784 int ret; 785 786 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 787 inp->pkt = NULL; 788 inp->control = NULL; 789 return (ret); 790 } else { 791 return (0); 792 } 793 } 794 795 static int 796 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 797 { 798 uint32_t vrf_id; 799 int error = 0; 800 struct sctp_inpcb *inp; 801 struct sctp_tcb *stcb; 802 803 #ifdef INET 804 struct in6pcb *inp6; 805 struct sockaddr_in6 *sin6; 806 union sctp_sockstore store; 807 808 #endif 809 810 #ifdef INET 811 inp6 = (struct in6pcb *)so->so_pcb; 812 #endif 813 inp = (struct sctp_inpcb *)so->so_pcb; 814 if (inp == NULL) { 815 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 816 return (ECONNRESET); /* I made the same as TCP since we are 817 * not setup? */ 818 } 819 if (addr == NULL) { 820 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 821 return (EINVAL); 822 } 823 switch (addr->sa_family) { 824 #ifdef INET 825 case AF_INET: 826 if (addr->sa_len != sizeof(struct sockaddr_in)) { 827 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 828 return (EINVAL); 829 } 830 break; 831 #endif 832 #ifdef INET6 833 case AF_INET6: 834 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 835 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 836 return (EINVAL); 837 } 838 break; 839 #endif 840 default: 841 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 842 return (EINVAL); 843 } 844 845 vrf_id = inp->def_vrf_id; 846 SCTP_ASOC_CREATE_LOCK(inp); 847 SCTP_INP_RLOCK(inp); 848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 849 SCTP_PCB_FLAGS_UNBOUND) { 850 /* Bind a ephemeral port */ 851 SCTP_INP_RUNLOCK(inp); 852 error = sctp6_bind(so, NULL, p); 853 if (error) { 854 SCTP_ASOC_CREATE_UNLOCK(inp); 855 856 return (error); 857 } 858 SCTP_INP_RLOCK(inp); 859 } 860 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 861 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 862 /* We are already connected AND the TCP model */ 863 SCTP_INP_RUNLOCK(inp); 864 SCTP_ASOC_CREATE_UNLOCK(inp); 865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 866 return (EADDRINUSE); 867 } 868 #ifdef INET 869 sin6 = (struct sockaddr_in6 *)addr; 870 if (SCTP_IPV6_V6ONLY(inp6)) { 871 /* 872 * if IPV6_V6ONLY flag, ignore connections destined to a v4 873 * addr or v4-mapped addr 874 */ 875 if (addr->sa_family == AF_INET) { 876 SCTP_INP_RUNLOCK(inp); 877 SCTP_ASOC_CREATE_UNLOCK(inp); 878 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 879 return (EINVAL); 880 } 881 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 882 SCTP_INP_RUNLOCK(inp); 883 SCTP_ASOC_CREATE_UNLOCK(inp); 884 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 885 return (EINVAL); 886 } 887 } 888 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 889 /* convert v4-mapped into v4 addr */ 890 in6_sin6_2_sin(&store.sin, sin6); 891 addr = &store.sa; 892 } 893 #endif /* INET */ 894 /* Now do we connect? */ 895 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 896 stcb = LIST_FIRST(&inp->sctp_asoc_list); 897 if (stcb) { 898 SCTP_TCB_UNLOCK(stcb); 899 } 900 SCTP_INP_RUNLOCK(inp); 901 } else { 902 SCTP_INP_RUNLOCK(inp); 903 SCTP_INP_WLOCK(inp); 904 SCTP_INP_INCR_REF(inp); 905 SCTP_INP_WUNLOCK(inp); 906 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 907 if (stcb == NULL) { 908 SCTP_INP_WLOCK(inp); 909 SCTP_INP_DECR_REF(inp); 910 SCTP_INP_WUNLOCK(inp); 911 } 912 } 913 914 if (stcb != NULL) { 915 /* Already have or am bring up an association */ 916 SCTP_ASOC_CREATE_UNLOCK(inp); 917 SCTP_TCB_UNLOCK(stcb); 918 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 919 return (EALREADY); 920 } 921 /* We are GOOD to go */ 922 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, inp->sctp_ep.pre_open_stream_count, p); 923 SCTP_ASOC_CREATE_UNLOCK(inp); 924 if (stcb == NULL) { 925 /* Gak! no memory */ 926 return (error); 927 } 928 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 929 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 930 /* Set the connected flag so we can queue data */ 931 soisconnecting(so); 932 } 933 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 934 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 935 936 /* initialize authentication parameters for the assoc */ 937 sctp_initialize_auth_params(inp, stcb); 938 939 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 940 SCTP_TCB_UNLOCK(stcb); 941 return (error); 942 } 943 944 static int 945 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 946 { 947 struct sockaddr_in6 *sin6; 948 struct sctp_inpcb *inp; 949 uint32_t vrf_id; 950 struct sctp_ifa *sctp_ifa; 951 952 int error; 953 954 /* 955 * Do the malloc first in case it blocks. 956 */ 957 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 958 if (sin6 == NULL) 959 return (ENOMEM); 960 sin6->sin6_family = AF_INET6; 961 sin6->sin6_len = sizeof(*sin6); 962 963 inp = (struct sctp_inpcb *)so->so_pcb; 964 if (inp == NULL) { 965 SCTP_FREE_SONAME(sin6); 966 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 967 return (ECONNRESET); 968 } 969 SCTP_INP_RLOCK(inp); 970 sin6->sin6_port = inp->sctp_lport; 971 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 972 /* For the bound all case you get back 0 */ 973 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 974 struct sctp_tcb *stcb; 975 struct sockaddr_in6 *sin_a6; 976 struct sctp_nets *net; 977 int fnd; 978 979 stcb = LIST_FIRST(&inp->sctp_asoc_list); 980 if (stcb == NULL) { 981 SCTP_INP_RUNLOCK(inp); 982 SCTP_FREE_SONAME(sin6); 983 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 984 return (ENOENT); 985 } 986 fnd = 0; 987 sin_a6 = NULL; 988 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 989 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 990 if (sin_a6 == NULL) 991 /* this will make coverity happy */ 992 continue; 993 994 if (sin_a6->sin6_family == AF_INET6) { 995 fnd = 1; 996 break; 997 } 998 } 999 if ((!fnd) || (sin_a6 == NULL)) { 1000 /* punt */ 1001 SCTP_INP_RUNLOCK(inp); 1002 SCTP_FREE_SONAME(sin6); 1003 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1004 return (ENOENT); 1005 } 1006 vrf_id = inp->def_vrf_id; 1007 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1008 if (sctp_ifa) { 1009 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1010 } 1011 } else { 1012 /* For the bound all case you get back 0 */ 1013 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1014 } 1015 } else { 1016 /* Take the first IPv6 address in the list */ 1017 struct sctp_laddr *laddr; 1018 int fnd = 0; 1019 1020 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1021 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1022 struct sockaddr_in6 *sin_a; 1023 1024 sin_a = &laddr->ifa->address.sin6; 1025 sin6->sin6_addr = sin_a->sin6_addr; 1026 fnd = 1; 1027 break; 1028 } 1029 } 1030 if (!fnd) { 1031 SCTP_FREE_SONAME(sin6); 1032 SCTP_INP_RUNLOCK(inp); 1033 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1034 return (ENOENT); 1035 } 1036 } 1037 SCTP_INP_RUNLOCK(inp); 1038 /* Scoping things for v6 */ 1039 if ((error = sa6_recoverscope(sin6)) != 0) { 1040 SCTP_FREE_SONAME(sin6); 1041 return (error); 1042 } 1043 (*addr) = (struct sockaddr *)sin6; 1044 return (0); 1045 } 1046 1047 static int 1048 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1049 { 1050 struct sockaddr_in6 *sin6; 1051 int fnd; 1052 struct sockaddr_in6 *sin_a6; 1053 struct sctp_inpcb *inp; 1054 struct sctp_tcb *stcb; 1055 struct sctp_nets *net; 1056 int error; 1057 1058 /* Do the malloc first in case it blocks. */ 1059 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1060 if (sin6 == NULL) 1061 return (ENOMEM); 1062 sin6->sin6_family = AF_INET6; 1063 sin6->sin6_len = sizeof(*sin6); 1064 1065 inp = (struct sctp_inpcb *)so->so_pcb; 1066 if ((inp == NULL) || 1067 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1068 /* UDP type and listeners will drop out here */ 1069 SCTP_FREE_SONAME(sin6); 1070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1071 return (ENOTCONN); 1072 } 1073 SCTP_INP_RLOCK(inp); 1074 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1075 if (stcb) { 1076 SCTP_TCB_LOCK(stcb); 1077 } 1078 SCTP_INP_RUNLOCK(inp); 1079 if (stcb == NULL) { 1080 SCTP_FREE_SONAME(sin6); 1081 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1082 return (ECONNRESET); 1083 } 1084 fnd = 0; 1085 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1086 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1087 if (sin_a6->sin6_family == AF_INET6) { 1088 fnd = 1; 1089 sin6->sin6_port = stcb->rport; 1090 sin6->sin6_addr = sin_a6->sin6_addr; 1091 break; 1092 } 1093 } 1094 SCTP_TCB_UNLOCK(stcb); 1095 if (!fnd) { 1096 /* No IPv4 address */ 1097 SCTP_FREE_SONAME(sin6); 1098 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1099 return (ENOENT); 1100 } 1101 if ((error = sa6_recoverscope(sin6)) != 0) { 1102 SCTP_FREE_SONAME(sin6); 1103 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1104 return (error); 1105 } 1106 *addr = (struct sockaddr *)sin6; 1107 return (0); 1108 } 1109 1110 static int 1111 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1112 { 1113 struct in6pcb *inp6 = sotoin6pcb(so); 1114 int error; 1115 1116 if (inp6 == NULL) { 1117 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1118 return (EINVAL); 1119 } 1120 /* allow v6 addresses precedence */ 1121 error = sctp6_getaddr(so, nam); 1122 #ifdef INET 1123 if (error) { 1124 struct sockaddr_in6 *sin6; 1125 1126 /* try v4 next if v6 failed */ 1127 error = sctp_ingetaddr(so, nam); 1128 if (error) { 1129 return (error); 1130 } 1131 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1132 if (sin6 == NULL) { 1133 SCTP_FREE_SONAME(*nam); 1134 return (ENOMEM); 1135 } 1136 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1137 SCTP_FREE_SONAME(*nam); 1138 *nam = (struct sockaddr *)sin6; 1139 } 1140 #endif 1141 return (error); 1142 } 1143 1144 1145 static int 1146 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1147 { 1148 struct in6pcb *inp6 = sotoin6pcb(so); 1149 int error; 1150 1151 if (inp6 == NULL) { 1152 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1153 return (EINVAL); 1154 } 1155 /* allow v6 addresses precedence */ 1156 error = sctp6_peeraddr(so, nam); 1157 #ifdef INET 1158 if (error) { 1159 struct sockaddr_in6 *sin6; 1160 1161 /* try v4 next if v6 failed */ 1162 error = sctp_peeraddr(so, nam); 1163 if (error) { 1164 return (error); 1165 } 1166 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1167 if (sin6 == NULL) { 1168 SCTP_FREE_SONAME(*nam); 1169 return (ENOMEM); 1170 } 1171 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1172 SCTP_FREE_SONAME(*nam); 1173 *nam = (struct sockaddr *)sin6; 1174 } 1175 #endif 1176 return (error); 1177 } 1178 1179 struct pr_usrreqs sctp6_usrreqs = { 1180 .pru_abort = sctp6_abort, 1181 .pru_accept = sctp_accept, 1182 .pru_attach = sctp6_attach, 1183 .pru_bind = sctp6_bind, 1184 .pru_connect = sctp6_connect, 1185 .pru_control = in6_control, 1186 .pru_close = sctp6_close, 1187 .pru_detach = sctp6_close, 1188 .pru_sopoll = sopoll_generic, 1189 .pru_flush = sctp_flush, 1190 .pru_disconnect = sctp6_disconnect, 1191 .pru_listen = sctp_listen, 1192 .pru_peeraddr = sctp6_getpeeraddr, 1193 .pru_send = sctp6_send, 1194 .pru_shutdown = sctp_shutdown, 1195 .pru_sockaddr = sctp6_in6getaddr, 1196 .pru_sosend = sctp_sosend, 1197 .pru_soreceive = sctp_soreceive 1198 }; 1199 1200 #endif 1201