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 /* Check the verification tag */ 346 if (ntohl(sh.v_tag) != 0) { 347 /* 348 * This must be the verification tag used 349 * for sending out packets. We don't 350 * consider packets reflecting the 351 * verification tag. 352 */ 353 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 354 SCTP_TCB_UNLOCK(stcb); 355 return; 356 } 357 } else { 358 if (ip6cp->ip6c_m->m_pkthdr.len >= 359 ip6cp->ip6c_off + sizeof(struct sctphdr) + 360 sizeof(struct sctp_chunkhdr) + 361 offsetof(struct sctp_init, a_rwnd)) { 362 /* 363 * In this case we can check if we 364 * got an INIT chunk and if the 365 * initiate tag matches. 366 */ 367 uint32_t initiate_tag; 368 uint8_t chunk_type; 369 370 m_copydata(ip6cp->ip6c_m, 371 ip6cp->ip6c_off + 372 sizeof(struct sctphdr), 373 sizeof(uint8_t), 374 (caddr_t)&chunk_type); 375 m_copydata(ip6cp->ip6c_m, 376 ip6cp->ip6c_off + 377 sizeof(struct sctphdr) + 378 sizeof(struct sctp_chunkhdr), 379 sizeof(uint32_t), 380 (caddr_t)&initiate_tag); 381 if ((chunk_type != SCTP_INITIATION) || 382 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 383 SCTP_TCB_UNLOCK(stcb); 384 return; 385 } 386 } else { 387 SCTP_TCB_UNLOCK(stcb); 388 return; 389 } 390 } 391 sctp6_notify(inp, stcb, net, 392 ip6cp->ip6c_icmp6->icmp6_type, 393 ip6cp->ip6c_icmp6->icmp6_code, 394 (uint16_t) ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 395 } else { 396 if ((stcb == NULL) && (inp != NULL)) { 397 /* reduce inp's ref-count */ 398 SCTP_INP_WLOCK(inp); 399 SCTP_INP_DECR_REF(inp); 400 SCTP_INP_WUNLOCK(inp); 401 } 402 if (stcb) { 403 SCTP_TCB_UNLOCK(stcb); 404 } 405 } 406 } 407 } 408 409 /* 410 * this routine can probably be collasped into the one in sctp_userreq.c 411 * since they do the same thing and now we lookup with a sockaddr 412 */ 413 static int 414 sctp6_getcred(SYSCTL_HANDLER_ARGS) 415 { 416 struct xucred xuc; 417 struct sockaddr_in6 addrs[2]; 418 struct sctp_inpcb *inp; 419 struct sctp_nets *net; 420 struct sctp_tcb *stcb; 421 int error; 422 uint32_t vrf_id; 423 424 vrf_id = SCTP_DEFAULT_VRFID; 425 426 error = priv_check(req->td, PRIV_NETINET_GETCRED); 427 if (error) 428 return (error); 429 430 if (req->newlen != sizeof(addrs)) { 431 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 432 return (EINVAL); 433 } 434 if (req->oldlen != sizeof(struct ucred)) { 435 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 436 return (EINVAL); 437 } 438 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 439 if (error) 440 return (error); 441 442 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 443 sin6tosa(&addrs[0]), 444 &inp, &net, 1, vrf_id); 445 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 446 if ((inp != NULL) && (stcb == NULL)) { 447 /* reduce ref-count */ 448 SCTP_INP_WLOCK(inp); 449 SCTP_INP_DECR_REF(inp); 450 goto cred_can_cont; 451 } 452 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 453 error = ENOENT; 454 goto out; 455 } 456 SCTP_TCB_UNLOCK(stcb); 457 /* 458 * We use the write lock here, only since in the error leg we need 459 * it. If we used RLOCK, then we would have to 460 * wlock/decr/unlock/rlock. Which in theory could create a hole. 461 * Better to use higher wlock. 462 */ 463 SCTP_INP_WLOCK(inp); 464 cred_can_cont: 465 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 466 if (error) { 467 SCTP_INP_WUNLOCK(inp); 468 goto out; 469 } 470 cru2x(inp->sctp_socket->so_cred, &xuc); 471 SCTP_INP_WUNLOCK(inp); 472 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 473 out: 474 return (error); 475 } 476 477 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 478 0, 0, 479 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 480 481 482 /* This is the same as the sctp_abort() could be made common */ 483 static void 484 sctp6_abort(struct socket *so) 485 { 486 struct sctp_inpcb *inp; 487 uint32_t flags; 488 489 inp = (struct sctp_inpcb *)so->so_pcb; 490 if (inp == NULL) { 491 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 492 return; 493 } 494 sctp_must_try_again: 495 flags = inp->sctp_flags; 496 #ifdef SCTP_LOG_CLOSING 497 sctp_log_closing(inp, NULL, 17); 498 #endif 499 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 500 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 501 #ifdef SCTP_LOG_CLOSING 502 sctp_log_closing(inp, NULL, 16); 503 #endif 504 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 505 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 506 SOCK_LOCK(so); 507 SCTP_SB_CLEAR(so->so_snd); 508 /* 509 * same for the rcv ones, they are only here for the 510 * accounting/select. 511 */ 512 SCTP_SB_CLEAR(so->so_rcv); 513 /* Now null out the reference, we are completely detached. */ 514 so->so_pcb = NULL; 515 SOCK_UNLOCK(so); 516 } else { 517 flags = inp->sctp_flags; 518 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 519 goto sctp_must_try_again; 520 } 521 } 522 return; 523 } 524 525 static int 526 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 527 { 528 struct in6pcb *inp6; 529 int error; 530 struct sctp_inpcb *inp; 531 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 532 533 inp = (struct sctp_inpcb *)so->so_pcb; 534 if (inp != NULL) { 535 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 536 return (EINVAL); 537 } 538 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 539 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 540 if (error) 541 return (error); 542 } 543 error = sctp_inpcb_alloc(so, vrf_id); 544 if (error) 545 return (error); 546 inp = (struct sctp_inpcb *)so->so_pcb; 547 SCTP_INP_WLOCK(inp); 548 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 549 inp6 = (struct in6pcb *)inp; 550 551 inp6->inp_vflag |= INP_IPV6; 552 inp6->in6p_hops = -1; /* use kernel default */ 553 inp6->in6p_cksum = -1; /* just to be sure */ 554 #ifdef INET 555 /* 556 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 557 * socket as well, because the socket may be bound to an IPv6 558 * wildcard address, which may match an IPv4-mapped IPv6 address. 559 */ 560 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 561 #endif 562 /* 563 * Hmm what about the IPSEC stuff that is missing here but in 564 * sctp_attach()? 565 */ 566 SCTP_INP_WUNLOCK(inp); 567 return (0); 568 } 569 570 static int 571 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 572 { 573 struct sctp_inpcb *inp; 574 struct in6pcb *inp6; 575 int error; 576 577 inp = (struct sctp_inpcb *)so->so_pcb; 578 if (inp == NULL) { 579 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 580 return (EINVAL); 581 } 582 if (addr) { 583 switch (addr->sa_family) { 584 #ifdef INET 585 case AF_INET: 586 if (addr->sa_len != sizeof(struct sockaddr_in)) { 587 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 588 return (EINVAL); 589 } 590 break; 591 #endif 592 #ifdef INET6 593 case AF_INET6: 594 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 595 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 596 return (EINVAL); 597 } 598 break; 599 #endif 600 default: 601 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 602 return (EINVAL); 603 } 604 } 605 inp6 = (struct in6pcb *)inp; 606 inp6->inp_vflag &= ~INP_IPV4; 607 inp6->inp_vflag |= INP_IPV6; 608 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 609 switch (addr->sa_family) { 610 #ifdef INET 611 case AF_INET: 612 /* binding v4 addr to v6 socket, so reset flags */ 613 inp6->inp_vflag |= INP_IPV4; 614 inp6->inp_vflag &= ~INP_IPV6; 615 break; 616 #endif 617 #ifdef INET6 618 case AF_INET6: 619 { 620 struct sockaddr_in6 *sin6_p; 621 622 sin6_p = (struct sockaddr_in6 *)addr; 623 624 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 625 inp6->inp_vflag |= INP_IPV4; 626 } 627 #ifdef INET 628 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 629 struct sockaddr_in sin; 630 631 in6_sin6_2_sin(&sin, sin6_p); 632 inp6->inp_vflag |= INP_IPV4; 633 inp6->inp_vflag &= ~INP_IPV6; 634 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 635 return (error); 636 } 637 #endif 638 break; 639 } 640 #endif 641 default: 642 break; 643 } 644 } else if (addr != NULL) { 645 struct sockaddr_in6 *sin6_p; 646 647 /* IPV6_V6ONLY socket */ 648 #ifdef INET 649 if (addr->sa_family == AF_INET) { 650 /* can't bind v4 addr to v6 only socket! */ 651 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 652 return (EINVAL); 653 } 654 #endif 655 sin6_p = (struct sockaddr_in6 *)addr; 656 657 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 658 /* can't bind v4-mapped addrs either! */ 659 /* NOTE: we don't support SIIT */ 660 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 661 return (EINVAL); 662 } 663 } 664 error = sctp_inpcb_bind(so, addr, NULL, p); 665 return (error); 666 } 667 668 669 static void 670 sctp6_close(struct socket *so) 671 { 672 sctp_close(so); 673 } 674 675 /* This could be made common with sctp_detach() since they are identical */ 676 677 static 678 int 679 sctp6_disconnect(struct socket *so) 680 { 681 return (sctp_disconnect(so)); 682 } 683 684 685 int 686 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 687 struct mbuf *control, struct thread *p); 688 689 690 static int 691 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 692 struct mbuf *control, struct thread *p) 693 { 694 struct sctp_inpcb *inp; 695 struct in6pcb *inp6; 696 697 #ifdef INET 698 struct sockaddr_in6 *sin6; 699 700 #endif /* INET */ 701 /* No SPL needed since sctp_output does this */ 702 703 inp = (struct sctp_inpcb *)so->so_pcb; 704 if (inp == NULL) { 705 if (control) { 706 SCTP_RELEASE_PKT(control); 707 control = NULL; 708 } 709 SCTP_RELEASE_PKT(m); 710 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 711 return (EINVAL); 712 } 713 inp6 = (struct in6pcb *)inp; 714 /* 715 * For the TCP model we may get a NULL addr, if we are a connected 716 * socket thats ok. 717 */ 718 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 719 (addr == NULL)) { 720 goto connected_type; 721 } 722 if (addr == NULL) { 723 SCTP_RELEASE_PKT(m); 724 if (control) { 725 SCTP_RELEASE_PKT(control); 726 control = NULL; 727 } 728 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 729 return (EDESTADDRREQ); 730 } 731 #ifdef INET 732 sin6 = (struct sockaddr_in6 *)addr; 733 if (SCTP_IPV6_V6ONLY(inp6)) { 734 /* 735 * if IPV6_V6ONLY flag, we discard datagrams destined to a 736 * v4 addr or v4-mapped addr 737 */ 738 if (addr->sa_family == AF_INET) { 739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 740 return (EINVAL); 741 } 742 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 744 return (EINVAL); 745 } 746 } 747 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 748 struct sockaddr_in sin; 749 750 /* convert v4-mapped into v4 addr and send */ 751 in6_sin6_2_sin(&sin, sin6); 752 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 753 } 754 #endif /* INET */ 755 connected_type: 756 /* now what about control */ 757 if (control) { 758 if (inp->control) { 759 SCTP_PRINTF("huh? control set?\n"); 760 SCTP_RELEASE_PKT(inp->control); 761 inp->control = NULL; 762 } 763 inp->control = control; 764 } 765 /* Place the data */ 766 if (inp->pkt) { 767 SCTP_BUF_NEXT(inp->pkt_last) = m; 768 inp->pkt_last = m; 769 } else { 770 inp->pkt_last = inp->pkt = m; 771 } 772 if ( 773 /* FreeBSD and MacOSX uses a flag passed */ 774 ((flags & PRUS_MORETOCOME) == 0) 775 ) { 776 /* 777 * note with the current version this code will only be used 778 * by OpenBSD, NetBSD and FreeBSD have methods for 779 * re-defining sosend() to use sctp_sosend(). One can 780 * optionaly switch back to this code (by changing back the 781 * defininitions but this is not advisable. 782 */ 783 int ret; 784 785 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 786 inp->pkt = NULL; 787 inp->control = NULL; 788 return (ret); 789 } else { 790 return (0); 791 } 792 } 793 794 static int 795 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 796 { 797 uint32_t vrf_id; 798 int error = 0; 799 struct sctp_inpcb *inp; 800 struct sctp_tcb *stcb; 801 802 #ifdef INET 803 struct in6pcb *inp6; 804 struct sockaddr_in6 *sin6; 805 union sctp_sockstore store; 806 807 #endif 808 809 #ifdef INET 810 inp6 = (struct in6pcb *)so->so_pcb; 811 #endif 812 inp = (struct sctp_inpcb *)so->so_pcb; 813 if (inp == NULL) { 814 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 815 return (ECONNRESET); /* I made the same as TCP since we are 816 * not setup? */ 817 } 818 if (addr == NULL) { 819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 820 return (EINVAL); 821 } 822 switch (addr->sa_family) { 823 #ifdef INET 824 case AF_INET: 825 if (addr->sa_len != sizeof(struct sockaddr_in)) { 826 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 827 return (EINVAL); 828 } 829 break; 830 #endif 831 #ifdef INET6 832 case AF_INET6: 833 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 834 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 835 return (EINVAL); 836 } 837 break; 838 #endif 839 default: 840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 841 return (EINVAL); 842 } 843 844 vrf_id = inp->def_vrf_id; 845 SCTP_ASOC_CREATE_LOCK(inp); 846 SCTP_INP_RLOCK(inp); 847 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 848 SCTP_PCB_FLAGS_UNBOUND) { 849 /* Bind a ephemeral port */ 850 SCTP_INP_RUNLOCK(inp); 851 error = sctp6_bind(so, NULL, p); 852 if (error) { 853 SCTP_ASOC_CREATE_UNLOCK(inp); 854 855 return (error); 856 } 857 SCTP_INP_RLOCK(inp); 858 } 859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 860 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 861 /* We are already connected AND the TCP model */ 862 SCTP_INP_RUNLOCK(inp); 863 SCTP_ASOC_CREATE_UNLOCK(inp); 864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 865 return (EADDRINUSE); 866 } 867 #ifdef INET 868 sin6 = (struct sockaddr_in6 *)addr; 869 if (SCTP_IPV6_V6ONLY(inp6)) { 870 /* 871 * if IPV6_V6ONLY flag, ignore connections destined to a v4 872 * addr or v4-mapped addr 873 */ 874 if (addr->sa_family == AF_INET) { 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 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 881 SCTP_INP_RUNLOCK(inp); 882 SCTP_ASOC_CREATE_UNLOCK(inp); 883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 884 return (EINVAL); 885 } 886 } 887 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 888 /* convert v4-mapped into v4 addr */ 889 in6_sin6_2_sin(&store.sin, sin6); 890 addr = &store.sa; 891 } 892 #endif /* INET */ 893 /* Now do we connect? */ 894 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 895 stcb = LIST_FIRST(&inp->sctp_asoc_list); 896 if (stcb) { 897 SCTP_TCB_UNLOCK(stcb); 898 } 899 SCTP_INP_RUNLOCK(inp); 900 } else { 901 SCTP_INP_RUNLOCK(inp); 902 SCTP_INP_WLOCK(inp); 903 SCTP_INP_INCR_REF(inp); 904 SCTP_INP_WUNLOCK(inp); 905 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 906 if (stcb == NULL) { 907 SCTP_INP_WLOCK(inp); 908 SCTP_INP_DECR_REF(inp); 909 SCTP_INP_WUNLOCK(inp); 910 } 911 } 912 913 if (stcb != NULL) { 914 /* Already have or am bring up an association */ 915 SCTP_ASOC_CREATE_UNLOCK(inp); 916 SCTP_TCB_UNLOCK(stcb); 917 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 918 return (EALREADY); 919 } 920 /* We are GOOD to go */ 921 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 922 inp->sctp_ep.pre_open_stream_count, 923 inp->sctp_ep.port, 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