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