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 int 61 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 62 { 63 struct mbuf *m; 64 int iphlen; 65 uint32_t vrf_id; 66 uint8_t ecn_bits; 67 struct sockaddr_in6 src, dst; 68 struct ip6_hdr *ip6; 69 struct sctphdr *sh; 70 struct sctp_chunkhdr *ch; 71 int length, offset; 72 uint8_t compute_crc; 73 uint32_t mflowid; 74 uint8_t mflowtype; 75 uint16_t fibnum; 76 77 iphlen = *offp; 78 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 79 SCTP_RELEASE_PKT(*i_pak); 80 return (IPPROTO_DONE); 81 } 82 m = SCTP_HEADER_TO_CHAIN(*i_pak); 83 #ifdef SCTP_MBUF_LOGGING 84 /* Log in any input mbufs */ 85 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 86 sctp_log_mbc(m, SCTP_MBUF_INPUT); 87 } 88 #endif 89 #ifdef SCTP_PACKET_LOGGING 90 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 91 sctp_packet_log(m); 92 } 93 #endif 94 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 95 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 96 m->m_pkthdr.len, 97 if_name(m->m_pkthdr.rcvif), 98 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 99 mflowid = m->m_pkthdr.flowid; 100 mflowtype = M_HASHTYPE_GET(m); 101 fibnum = M_GETFIB(m); 102 SCTP_STAT_INCR(sctps_recvpackets); 103 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 104 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 105 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 106 if (m->m_len < offset) { 107 m = m_pullup(m, offset); 108 if (m == NULL) { 109 SCTP_STAT_INCR(sctps_hdrops); 110 return (IPPROTO_DONE); 111 } 112 } 113 ip6 = mtod(m, struct ip6_hdr *); 114 sh = (struct sctphdr *)(mtod(m, caddr_t)+iphlen); 115 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 116 offset -= sizeof(struct sctp_chunkhdr); 117 memset(&src, 0, sizeof(struct sockaddr_in6)); 118 src.sin6_family = AF_INET6; 119 src.sin6_len = sizeof(struct sockaddr_in6); 120 src.sin6_port = sh->src_port; 121 src.sin6_addr = ip6->ip6_src; 122 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 123 goto out; 124 } 125 memset(&dst, 0, sizeof(struct sockaddr_in6)); 126 dst.sin6_family = AF_INET6; 127 dst.sin6_len = sizeof(struct sockaddr_in6); 128 dst.sin6_port = sh->dest_port; 129 dst.sin6_addr = ip6->ip6_dst; 130 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 131 goto out; 132 } 133 length = ntohs(ip6->ip6_plen) + iphlen; 134 /* Validate mbuf chain length with IP payload length. */ 135 if (SCTP_HEADER_LEN(m) != length) { 136 SCTPDBG(SCTP_DEBUG_INPUT1, 137 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 138 SCTP_STAT_INCR(sctps_hdrops); 139 goto out; 140 } 141 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 142 goto out; 143 } 144 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 145 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 146 SCTP_STAT_INCR(sctps_recvhwcrc); 147 compute_crc = 0; 148 } else { 149 SCTP_STAT_INCR(sctps_recvswcrc); 150 compute_crc = 1; 151 } 152 sctp_common_input_processing(&m, iphlen, offset, length, 153 (struct sockaddr *)&src, 154 (struct sockaddr *)&dst, 155 sh, ch, 156 compute_crc, 157 ecn_bits, 158 mflowtype, mflowid, fibnum, 159 vrf_id, port); 160 out: 161 if (m) { 162 sctp_m_freem(m); 163 } 164 return (IPPROTO_DONE); 165 } 166 167 168 int 169 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 170 { 171 return (sctp6_input_with_port(i_pak, offp, 0)); 172 } 173 174 void 175 sctp6_notify(struct sctp_inpcb *inp, 176 struct sctp_tcb *stcb, 177 struct sctp_nets *net, 178 uint8_t icmp6_type, 179 uint8_t icmp6_code, 180 uint32_t next_mtu) 181 { 182 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 183 struct socket *so; 184 #endif 185 int timer_stopped; 186 187 switch (icmp6_type) { 188 case ICMP6_DST_UNREACH: 189 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || 190 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || 191 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || 192 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { 193 /* Mark the net unreachable. */ 194 if (net->dest_state & SCTP_ADDR_REACHABLE) { 195 /* Ok that destination is not reachable */ 196 net->dest_state &= ~SCTP_ADDR_REACHABLE; 197 net->dest_state &= ~SCTP_ADDR_PF; 198 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 199 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 200 } 201 } 202 SCTP_TCB_UNLOCK(stcb); 203 break; 204 case ICMP6_PARAM_PROB: 205 /* Treat it like an ABORT. */ 206 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { 207 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 208 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 209 so = SCTP_INP_SO(inp); 210 atomic_add_int(&stcb->asoc.refcnt, 1); 211 SCTP_TCB_UNLOCK(stcb); 212 SCTP_SOCKET_LOCK(so, 1); 213 SCTP_TCB_LOCK(stcb); 214 atomic_subtract_int(&stcb->asoc.refcnt, 1); 215 #endif 216 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 217 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 218 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 219 SCTP_SOCKET_UNLOCK(so, 1); 220 #endif 221 } else { 222 SCTP_TCB_UNLOCK(stcb); 223 } 224 break; 225 case ICMP6_PACKET_TOO_BIG: 226 if (net->dest_state & SCTP_ADDR_NO_PMTUD) { 227 SCTP_TCB_UNLOCK(stcb); 228 break; 229 } 230 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 231 timer_stopped = 1; 232 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 233 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 234 } else { 235 timer_stopped = 0; 236 } 237 /* Update the path MTU. */ 238 if (net->port) { 239 next_mtu -= sizeof(struct udphdr); 240 } 241 if (net->mtu > next_mtu) { 242 net->mtu = next_mtu; 243 if (net->port) { 244 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); 245 } else { 246 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); 247 } 248 } 249 /* Update the association MTU */ 250 if (stcb->asoc.smallest_mtu > next_mtu) { 251 sctp_pathmtu_adjustment(stcb, next_mtu); 252 } 253 /* Finally, start the PMTU timer if it was running before. */ 254 if (timer_stopped) { 255 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 256 } 257 SCTP_TCB_UNLOCK(stcb); 258 break; 259 default: 260 SCTP_TCB_UNLOCK(stcb); 261 break; 262 } 263 } 264 265 void 266 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 267 { 268 struct ip6ctlparam *ip6cp; 269 struct sctp_inpcb *inp; 270 struct sctp_tcb *stcb; 271 struct sctp_nets *net; 272 struct sctphdr sh; 273 struct sockaddr_in6 src, dst; 274 275 if (pktdst->sa_family != AF_INET6 || 276 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 277 return; 278 } 279 280 if ((unsigned)cmd >= PRC_NCMDS) { 281 return; 282 } 283 if (PRC_IS_REDIRECT(cmd)) { 284 d = NULL; 285 } else if (inet6ctlerrmap[cmd] == 0) { 286 return; 287 } 288 /* If the parameter is from icmp6, decode it. */ 289 if (d != NULL) { 290 ip6cp = (struct ip6ctlparam *)d; 291 } else { 292 ip6cp = (struct ip6ctlparam *)NULL; 293 } 294 295 if (ip6cp != NULL) { 296 /* 297 * XXX: We assume that when IPV6 is non NULL, M and OFF are 298 * valid. 299 */ 300 if (ip6cp->ip6c_m == NULL) { 301 return; 302 } 303 304 /* 305 * Check if we can safely examine the ports and the 306 * verification tag of the SCTP common header. 307 */ 308 if (ip6cp->ip6c_m->m_pkthdr.len < 309 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 310 return; 311 } 312 313 /* 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, 476 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 477 0, 0, sctp6_getcred, "S,ucred", 478 "Get the ucred of a SCTP6 connection"); 479 480 481 /* This is the same as the sctp_abort() could be made common */ 482 static void 483 sctp6_abort(struct socket *so) 484 { 485 struct epoch_tracker et; 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 NET_EPOCH_ENTER(et); 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 NET_EPOCH_EXIT(et); 524 return; 525 } 526 527 static int 528 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 529 { 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 } 539 540 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 541 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 542 if (error) 543 return (error); 544 } 545 error = sctp_inpcb_alloc(so, vrf_id); 546 if (error) 547 return (error); 548 inp = (struct sctp_inpcb *)so->so_pcb; 549 SCTP_INP_WLOCK(inp); 550 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 551 552 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 553 inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */ 554 inp->ip_inp.inp.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 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 562 #endif 563 SCTP_INP_WUNLOCK(inp); 564 return (0); 565 } 566 567 static int 568 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 569 { 570 struct sctp_inpcb *inp; 571 int error; 572 u_char vflagsav; 573 574 inp = (struct sctp_inpcb *)so->so_pcb; 575 if (inp == NULL) { 576 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 577 return (EINVAL); 578 } 579 580 if (addr) { 581 switch (addr->sa_family) { 582 #ifdef INET 583 case AF_INET: 584 if (addr->sa_len != sizeof(struct sockaddr_in)) { 585 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 586 return (EINVAL); 587 } 588 break; 589 #endif 590 #ifdef INET6 591 case AF_INET6: 592 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 593 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 594 return (EINVAL); 595 } 596 break; 597 #endif 598 default: 599 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 600 return (EINVAL); 601 } 602 } 603 vflagsav = inp->ip_inp.inp.inp_vflag; 604 inp->ip_inp.inp.inp_vflag &= ~INP_IPV4; 605 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 606 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) { 607 switch (addr->sa_family) { 608 #ifdef INET 609 case AF_INET: 610 /* binding v4 addr to v6 socket, so reset flags */ 611 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 612 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; 613 break; 614 #endif 615 #ifdef INET6 616 case AF_INET6: 617 { 618 struct sockaddr_in6 *sin6_p; 619 620 sin6_p = (struct sockaddr_in6 *)addr; 621 622 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 623 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 624 } 625 #ifdef INET 626 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 627 struct sockaddr_in sin; 628 629 in6_sin6_2_sin(&sin, sin6_p); 630 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 631 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; 632 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 633 goto out; 634 } 635 #endif 636 break; 637 } 638 #endif 639 default: 640 break; 641 } 642 } else if (addr != NULL) { 643 struct sockaddr_in6 *sin6_p; 644 645 /* IPV6_V6ONLY socket */ 646 #ifdef INET 647 if (addr->sa_family == AF_INET) { 648 /* can't bind v4 addr to v6 only socket! */ 649 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 650 error = EINVAL; 651 goto out; 652 } 653 #endif 654 sin6_p = (struct sockaddr_in6 *)addr; 655 656 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 657 /* can't bind v4-mapped addrs either! */ 658 /* NOTE: we don't support SIIT */ 659 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 660 error = EINVAL; 661 goto out; 662 } 663 } 664 error = sctp_inpcb_bind(so, addr, NULL, p); 665 out: 666 if (error != 0) 667 inp->ip_inp.inp.inp_vflag = vflagsav; 668 return (error); 669 } 670 671 672 static void 673 sctp6_close(struct socket *so) 674 { 675 sctp_close(so); 676 } 677 678 /* This could be made common with sctp_detach() since they are identical */ 679 680 static 681 int 682 sctp6_disconnect(struct socket *so) 683 { 684 return (sctp_disconnect(so)); 685 } 686 687 688 int 689 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 690 struct mbuf *control, struct thread *p); 691 692 693 static int 694 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 695 struct mbuf *control, struct thread *p) 696 { 697 struct sctp_inpcb *inp; 698 699 #ifdef INET 700 struct sockaddr_in6 *sin6; 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 /* 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(inp)) { 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 struct epoch_tracker et; 784 int ret; 785 786 NET_EPOCH_ENTER(et); 787 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 788 NET_EPOCH_EXIT(et); 789 inp->pkt = NULL; 790 inp->control = NULL; 791 return (ret); 792 } else { 793 return (0); 794 } 795 } 796 797 static int 798 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 799 { 800 struct epoch_tracker et; 801 uint32_t vrf_id; 802 int error = 0; 803 struct sctp_inpcb *inp; 804 struct sctp_tcb *stcb; 805 #ifdef INET 806 struct sockaddr_in6 *sin6; 807 union sctp_sockstore store; 808 #endif 809 810 inp = (struct sctp_inpcb *)so->so_pcb; 811 if (inp == NULL) { 812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 813 return (ECONNRESET); /* I made the same as TCP since we are 814 * not setup? */ 815 } 816 if (addr == NULL) { 817 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 818 return (EINVAL); 819 } 820 switch (addr->sa_family) { 821 #ifdef INET 822 case AF_INET: 823 if (addr->sa_len != sizeof(struct sockaddr_in)) { 824 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 825 return (EINVAL); 826 } 827 break; 828 #endif 829 #ifdef INET6 830 case AF_INET6: 831 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 833 return (EINVAL); 834 } 835 break; 836 #endif 837 default: 838 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 839 return (EINVAL); 840 } 841 842 vrf_id = inp->def_vrf_id; 843 SCTP_ASOC_CREATE_LOCK(inp); 844 SCTP_INP_RLOCK(inp); 845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 846 SCTP_PCB_FLAGS_UNBOUND) { 847 /* Bind a ephemeral port */ 848 SCTP_INP_RUNLOCK(inp); 849 error = sctp6_bind(so, NULL, p); 850 if (error) { 851 SCTP_ASOC_CREATE_UNLOCK(inp); 852 853 return (error); 854 } 855 SCTP_INP_RLOCK(inp); 856 } 857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 858 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 859 /* We are already connected AND the TCP model */ 860 SCTP_INP_RUNLOCK(inp); 861 SCTP_ASOC_CREATE_UNLOCK(inp); 862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 863 return (EADDRINUSE); 864 } 865 #ifdef INET 866 sin6 = (struct sockaddr_in6 *)addr; 867 if (SCTP_IPV6_V6ONLY(inp)) { 868 /* 869 * if IPV6_V6ONLY flag, ignore connections destined to a v4 870 * addr or v4-mapped addr 871 */ 872 if (addr->sa_family == AF_INET) { 873 SCTP_INP_RUNLOCK(inp); 874 SCTP_ASOC_CREATE_UNLOCK(inp); 875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 876 return (EINVAL); 877 } 878 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 879 SCTP_INP_RUNLOCK(inp); 880 SCTP_ASOC_CREATE_UNLOCK(inp); 881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 882 return (EINVAL); 883 } 884 } 885 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 886 /* convert v4-mapped into v4 addr */ 887 in6_sin6_2_sin(&store.sin, sin6); 888 addr = &store.sa; 889 } 890 #endif /* INET */ 891 /* Now do we connect? */ 892 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 893 stcb = LIST_FIRST(&inp->sctp_asoc_list); 894 if (stcb) { 895 SCTP_TCB_LOCK(stcb); 896 } 897 SCTP_INP_RUNLOCK(inp); 898 } else { 899 SCTP_INP_RUNLOCK(inp); 900 SCTP_INP_WLOCK(inp); 901 SCTP_INP_INCR_REF(inp); 902 SCTP_INP_WUNLOCK(inp); 903 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 904 if (stcb == NULL) { 905 SCTP_INP_WLOCK(inp); 906 SCTP_INP_DECR_REF(inp); 907 SCTP_INP_WUNLOCK(inp); 908 } 909 } 910 911 if (stcb != NULL) { 912 /* Already have or am bring up an association */ 913 SCTP_ASOC_CREATE_UNLOCK(inp); 914 SCTP_TCB_UNLOCK(stcb); 915 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 916 return (EALREADY); 917 } 918 /* We are GOOD to go */ 919 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 920 inp->sctp_ep.pre_open_stream_count, 921 inp->sctp_ep.port, p, 922 SCTP_INITIALIZE_AUTH_PARAMS); 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 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); 934 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 935 NET_EPOCH_ENTER(et); 936 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 937 SCTP_TCB_UNLOCK(stcb); 938 NET_EPOCH_EXIT(et); 939 return (error); 940 } 941 942 static int 943 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 944 { 945 struct sockaddr_in6 *sin6; 946 struct sctp_inpcb *inp; 947 uint32_t vrf_id; 948 struct sctp_ifa *sctp_ifa; 949 950 int error; 951 952 /* 953 * Do the malloc first in case it blocks. 954 */ 955 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 956 if (sin6 == NULL) 957 return (ENOMEM); 958 sin6->sin6_family = AF_INET6; 959 sin6->sin6_len = sizeof(*sin6); 960 961 inp = (struct sctp_inpcb *)so->so_pcb; 962 if (inp == NULL) { 963 SCTP_FREE_SONAME(sin6); 964 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 965 return (ECONNRESET); 966 } 967 SCTP_INP_RLOCK(inp); 968 sin6->sin6_port = inp->sctp_lport; 969 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 970 /* For the bound all case you get back 0 */ 971 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 972 struct sctp_tcb *stcb; 973 struct sockaddr_in6 *sin_a6; 974 struct sctp_nets *net; 975 int fnd; 976 977 stcb = LIST_FIRST(&inp->sctp_asoc_list); 978 if (stcb == NULL) { 979 SCTP_INP_RUNLOCK(inp); 980 SCTP_FREE_SONAME(sin6); 981 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 982 return (ENOENT); 983 } 984 fnd = 0; 985 sin_a6 = NULL; 986 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 987 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 988 if (sin_a6 == NULL) 989 /* this will make coverity happy */ 990 continue; 991 992 if (sin_a6->sin6_family == AF_INET6) { 993 fnd = 1; 994 break; 995 } 996 } 997 if ((!fnd) || (sin_a6 == NULL)) { 998 /* punt */ 999 SCTP_INP_RUNLOCK(inp); 1000 SCTP_FREE_SONAME(sin6); 1001 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1002 return (ENOENT); 1003 } 1004 vrf_id = inp->def_vrf_id; 1005 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 1006 if (sctp_ifa) { 1007 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1008 } 1009 } else { 1010 /* For the bound all case you get back 0 */ 1011 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1012 } 1013 } else { 1014 /* Take the first IPv6 address in the list */ 1015 struct sctp_laddr *laddr; 1016 int fnd = 0; 1017 1018 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1019 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1020 struct sockaddr_in6 *sin_a; 1021 1022 sin_a = &laddr->ifa->address.sin6; 1023 sin6->sin6_addr = sin_a->sin6_addr; 1024 fnd = 1; 1025 break; 1026 } 1027 } 1028 if (!fnd) { 1029 SCTP_FREE_SONAME(sin6); 1030 SCTP_INP_RUNLOCK(inp); 1031 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1032 return (ENOENT); 1033 } 1034 } 1035 SCTP_INP_RUNLOCK(inp); 1036 /* Scoping things for v6 */ 1037 if ((error = sa6_recoverscope(sin6)) != 0) { 1038 SCTP_FREE_SONAME(sin6); 1039 return (error); 1040 } 1041 (*addr) = (struct sockaddr *)sin6; 1042 return (0); 1043 } 1044 1045 static int 1046 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1047 { 1048 struct sockaddr_in6 *sin6; 1049 int fnd; 1050 struct sockaddr_in6 *sin_a6; 1051 struct sctp_inpcb *inp; 1052 struct sctp_tcb *stcb; 1053 struct sctp_nets *net; 1054 int error; 1055 1056 /* Do the malloc first in case it blocks. */ 1057 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1058 if (sin6 == NULL) 1059 return (ENOMEM); 1060 sin6->sin6_family = AF_INET6; 1061 sin6->sin6_len = sizeof(*sin6); 1062 1063 inp = (struct sctp_inpcb *)so->so_pcb; 1064 if ((inp == NULL) || 1065 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1066 /* UDP type and listeners will drop out here */ 1067 SCTP_FREE_SONAME(sin6); 1068 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1069 return (ENOTCONN); 1070 } 1071 SCTP_INP_RLOCK(inp); 1072 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1073 if (stcb) { 1074 SCTP_TCB_LOCK(stcb); 1075 } 1076 SCTP_INP_RUNLOCK(inp); 1077 if (stcb == NULL) { 1078 SCTP_FREE_SONAME(sin6); 1079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1080 return (ECONNRESET); 1081 } 1082 fnd = 0; 1083 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1084 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1085 if (sin_a6->sin6_family == AF_INET6) { 1086 fnd = 1; 1087 sin6->sin6_port = stcb->rport; 1088 sin6->sin6_addr = sin_a6->sin6_addr; 1089 break; 1090 } 1091 } 1092 SCTP_TCB_UNLOCK(stcb); 1093 if (!fnd) { 1094 /* No IPv4 address */ 1095 SCTP_FREE_SONAME(sin6); 1096 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1097 return (ENOENT); 1098 } 1099 if ((error = sa6_recoverscope(sin6)) != 0) { 1100 SCTP_FREE_SONAME(sin6); 1101 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1102 return (error); 1103 } 1104 *addr = (struct sockaddr *)sin6; 1105 return (0); 1106 } 1107 1108 static int 1109 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1110 { 1111 struct inpcb *inp = sotoinpcb(so); 1112 int error; 1113 1114 if (inp == NULL) { 1115 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1116 return (EINVAL); 1117 } 1118 1119 /* allow v6 addresses precedence */ 1120 error = sctp6_getaddr(so, nam); 1121 #ifdef INET 1122 if (error) { 1123 struct sockaddr_in6 *sin6; 1124 1125 /* try v4 next if v6 failed */ 1126 error = sctp_ingetaddr(so, nam); 1127 if (error) { 1128 return (error); 1129 } 1130 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1131 if (sin6 == NULL) { 1132 SCTP_FREE_SONAME(*nam); 1133 return (ENOMEM); 1134 } 1135 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1136 SCTP_FREE_SONAME(*nam); 1137 *nam = (struct sockaddr *)sin6; 1138 } 1139 #endif 1140 return (error); 1141 } 1142 1143 1144 static int 1145 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1146 { 1147 struct inpcb *inp = sotoinpcb(so); 1148 int error; 1149 1150 if (inp == NULL) { 1151 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1152 return (EINVAL); 1153 } 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