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