sctp6_usrreq.c revision 330897
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: stable/11/sys/netinet6/sctp6_usrreq.c 330897 2018-03-14 03:19:51Z eadler $"); 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 60extern struct protosw inetsw[]; 61 62int 63sctp6_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); 168out: 169 if (m) { 170 sctp_m_freem(m); 171 } 172 return (IPPROTO_DONE); 173} 174 175 176int 177sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 178{ 179 return (sctp6_input_with_port(i_pak, offp, 0)); 180} 181 182void 183sctp6_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 (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 235 timer_stopped = 1; 236 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 237 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 238 } else { 239 timer_stopped = 0; 240 } 241 /* Update the path MTU. */ 242 if (net->port) { 243 next_mtu -= sizeof(struct udphdr); 244 } 245 if (net->mtu > next_mtu) { 246 net->mtu = next_mtu; 247 } 248 /* Update the association MTU */ 249 if (stcb->asoc.smallest_mtu > next_mtu) { 250 sctp_pathmtu_adjustment(stcb, next_mtu); 251 } 252 /* Finally, start the PMTU timer if it was running before. */ 253 if (timer_stopped) { 254 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 255 } 256 SCTP_TCB_UNLOCK(stcb); 257 break; 258 default: 259 SCTP_TCB_UNLOCK(stcb); 260 break; 261 } 262} 263 264void 265sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 266{ 267 struct ip6ctlparam *ip6cp; 268 struct sctp_inpcb *inp; 269 struct sctp_tcb *stcb; 270 struct sctp_nets *net; 271 struct sctphdr sh; 272 struct sockaddr_in6 src, dst; 273 274 if (pktdst->sa_family != AF_INET6 || 275 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 276 return; 277 } 278 if ((unsigned)cmd >= PRC_NCMDS) { 279 return; 280 } 281 if (PRC_IS_REDIRECT(cmd)) { 282 d = NULL; 283 } else if (inet6ctlerrmap[cmd] == 0) { 284 return; 285 } 286 /* If the parameter is from icmp6, decode it. */ 287 if (d != NULL) { 288 ip6cp = (struct ip6ctlparam *)d; 289 } else { 290 ip6cp = (struct ip6ctlparam *)NULL; 291 } 292 293 if (ip6cp != NULL) { 294 /* 295 * XXX: We assume that when IPV6 is non NULL, M and OFF are 296 * valid. 297 */ 298 if (ip6cp->ip6c_m == NULL) { 299 return; 300 } 301 /* 302 * Check if we can safely examine the ports and the 303 * verification tag of the SCTP common header. 304 */ 305 if (ip6cp->ip6c_m->m_pkthdr.len < 306 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 307 return; 308 } 309 /* Copy out the port numbers and the verification tag. */ 310 bzero(&sh, sizeof(sh)); 311 m_copydata(ip6cp->ip6c_m, 312 ip6cp->ip6c_off, 313 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 314 (caddr_t)&sh); 315 memset(&src, 0, sizeof(struct sockaddr_in6)); 316 src.sin6_family = AF_INET6; 317 src.sin6_len = sizeof(struct sockaddr_in6); 318 src.sin6_port = sh.src_port; 319 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 320 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 321 return; 322 } 323 memset(&dst, 0, sizeof(struct sockaddr_in6)); 324 dst.sin6_family = AF_INET6; 325 dst.sin6_len = sizeof(struct sockaddr_in6); 326 dst.sin6_port = sh.dest_port; 327 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 328 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 329 return; 330 } 331 inp = NULL; 332 net = NULL; 333 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 334 (struct sockaddr *)&src, 335 &inp, &net, 1, SCTP_DEFAULT_VRFID); 336 if ((stcb != NULL) && 337 (net != NULL) && 338 (inp != NULL)) { 339 /* Check the verification tag */ 340 if (ntohl(sh.v_tag) != 0) { 341 /* 342 * This must be the verification tag used 343 * for sending out packets. We don't 344 * consider packets reflecting the 345 * verification tag. 346 */ 347 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 348 SCTP_TCB_UNLOCK(stcb); 349 return; 350 } 351 } else { 352 if (ip6cp->ip6c_m->m_pkthdr.len >= 353 ip6cp->ip6c_off + sizeof(struct sctphdr) + 354 sizeof(struct sctp_chunkhdr) + 355 offsetof(struct sctp_init, a_rwnd)) { 356 /* 357 * In this case we can check if we 358 * got an INIT chunk and if the 359 * initiate tag matches. 360 */ 361 uint32_t initiate_tag; 362 uint8_t chunk_type; 363 364 m_copydata(ip6cp->ip6c_m, 365 ip6cp->ip6c_off + 366 sizeof(struct sctphdr), 367 sizeof(uint8_t), 368 (caddr_t)&chunk_type); 369 m_copydata(ip6cp->ip6c_m, 370 ip6cp->ip6c_off + 371 sizeof(struct sctphdr) + 372 sizeof(struct sctp_chunkhdr), 373 sizeof(uint32_t), 374 (caddr_t)&initiate_tag); 375 if ((chunk_type != SCTP_INITIATION) || 376 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 377 SCTP_TCB_UNLOCK(stcb); 378 return; 379 } 380 } else { 381 SCTP_TCB_UNLOCK(stcb); 382 return; 383 } 384 } 385 sctp6_notify(inp, stcb, net, 386 ip6cp->ip6c_icmp6->icmp6_type, 387 ip6cp->ip6c_icmp6->icmp6_code, 388 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 389 } else { 390 if ((stcb == NULL) && (inp != NULL)) { 391 /* reduce inp's ref-count */ 392 SCTP_INP_WLOCK(inp); 393 SCTP_INP_DECR_REF(inp); 394 SCTP_INP_WUNLOCK(inp); 395 } 396 if (stcb) { 397 SCTP_TCB_UNLOCK(stcb); 398 } 399 } 400 } 401} 402 403/* 404 * this routine can probably be collasped into the one in sctp_userreq.c 405 * since they do the same thing and now we lookup with a sockaddr 406 */ 407static int 408sctp6_getcred(SYSCTL_HANDLER_ARGS) 409{ 410 struct xucred xuc; 411 struct sockaddr_in6 addrs[2]; 412 struct sctp_inpcb *inp; 413 struct sctp_nets *net; 414 struct sctp_tcb *stcb; 415 int error; 416 uint32_t vrf_id; 417 418 vrf_id = SCTP_DEFAULT_VRFID; 419 420 error = priv_check(req->td, PRIV_NETINET_GETCRED); 421 if (error) 422 return (error); 423 424 if (req->newlen != sizeof(addrs)) { 425 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 426 return (EINVAL); 427 } 428 if (req->oldlen != sizeof(struct ucred)) { 429 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 430 return (EINVAL); 431 } 432 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 433 if (error) 434 return (error); 435 436 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 437 sin6tosa(&addrs[0]), 438 &inp, &net, 1, vrf_id); 439 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 440 if ((inp != NULL) && (stcb == NULL)) { 441 /* reduce ref-count */ 442 SCTP_INP_WLOCK(inp); 443 SCTP_INP_DECR_REF(inp); 444 goto cred_can_cont; 445 } 446 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 447 error = ENOENT; 448 goto out; 449 } 450 SCTP_TCB_UNLOCK(stcb); 451 /* 452 * We use the write lock here, only since in the error leg we need 453 * it. If we used RLOCK, then we would have to 454 * wlock/decr/unlock/rlock. Which in theory could create a hole. 455 * Better to use higher wlock. 456 */ 457 SCTP_INP_WLOCK(inp); 458cred_can_cont: 459 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 460 if (error) { 461 SCTP_INP_WUNLOCK(inp); 462 goto out; 463 } 464 cru2x(inp->sctp_socket->so_cred, &xuc); 465 SCTP_INP_WUNLOCK(inp); 466 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 467out: 468 return (error); 469} 470 471SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 472 0, 0, 473 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 474 475 476/* This is the same as the sctp_abort() could be made common */ 477static void 478sctp6_abort(struct socket *so) 479{ 480 struct sctp_inpcb *inp; 481 uint32_t flags; 482 483 inp = (struct sctp_inpcb *)so->so_pcb; 484 if (inp == NULL) { 485 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 486 return; 487 } 488sctp_must_try_again: 489 flags = inp->sctp_flags; 490#ifdef SCTP_LOG_CLOSING 491 sctp_log_closing(inp, NULL, 17); 492#endif 493 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 494 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 495#ifdef SCTP_LOG_CLOSING 496 sctp_log_closing(inp, NULL, 16); 497#endif 498 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 499 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 500 SOCK_LOCK(so); 501 SCTP_SB_CLEAR(so->so_snd); 502 /* 503 * same for the rcv ones, they are only here for the 504 * accounting/select. 505 */ 506 SCTP_SB_CLEAR(so->so_rcv); 507 /* Now null out the reference, we are completely detached. */ 508 so->so_pcb = NULL; 509 SOCK_UNLOCK(so); 510 } else { 511 flags = inp->sctp_flags; 512 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 513 goto sctp_must_try_again; 514 } 515 } 516 return; 517} 518 519static int 520sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 521{ 522 struct in6pcb *inp6; 523 int error; 524 struct sctp_inpcb *inp; 525 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 526 527 inp = (struct sctp_inpcb *)so->so_pcb; 528 if (inp != NULL) { 529 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 530 return (EINVAL); 531 } 532 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 533 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 534 if (error) 535 return (error); 536 } 537 error = sctp_inpcb_alloc(so, vrf_id); 538 if (error) 539 return (error); 540 inp = (struct sctp_inpcb *)so->so_pcb; 541 SCTP_INP_WLOCK(inp); 542 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 543 inp6 = (struct in6pcb *)inp; 544 545 inp6->inp_vflag |= INP_IPV6; 546 inp6->in6p_hops = -1; /* use kernel default */ 547 inp6->in6p_cksum = -1; /* just to be sure */ 548#ifdef INET 549 /* 550 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 551 * socket as well, because the socket may be bound to an IPv6 552 * wildcard address, which may match an IPv4-mapped IPv6 address. 553 */ 554 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 555#endif 556 SCTP_INP_WUNLOCK(inp); 557 return (0); 558} 559 560static int 561sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 562{ 563 struct sctp_inpcb *inp; 564 struct in6pcb *inp6; 565 int error; 566 567 inp = (struct sctp_inpcb *)so->so_pcb; 568 if (inp == NULL) { 569 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 570 return (EINVAL); 571 } 572 if (addr) { 573 switch (addr->sa_family) { 574#ifdef INET 575 case AF_INET: 576 if (addr->sa_len != sizeof(struct sockaddr_in)) { 577 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 578 return (EINVAL); 579 } 580 break; 581#endif 582#ifdef INET6 583 case AF_INET6: 584 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 585 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 586 return (EINVAL); 587 } 588 break; 589#endif 590 default: 591 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 592 return (EINVAL); 593 } 594 } 595 inp6 = (struct in6pcb *)inp; 596 inp6->inp_vflag &= ~INP_IPV4; 597 inp6->inp_vflag |= INP_IPV6; 598 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 599 switch (addr->sa_family) { 600#ifdef INET 601 case AF_INET: 602 /* binding v4 addr to v6 socket, so reset flags */ 603 inp6->inp_vflag |= INP_IPV4; 604 inp6->inp_vflag &= ~INP_IPV6; 605 break; 606#endif 607#ifdef INET6 608 case AF_INET6: 609 { 610 struct sockaddr_in6 *sin6_p; 611 612 sin6_p = (struct sockaddr_in6 *)addr; 613 614 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 615 inp6->inp_vflag |= INP_IPV4; 616 } 617#ifdef INET 618 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 619 struct sockaddr_in sin; 620 621 in6_sin6_2_sin(&sin, sin6_p); 622 inp6->inp_vflag |= INP_IPV4; 623 inp6->inp_vflag &= ~INP_IPV6; 624 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 625 return (error); 626 } 627#endif 628 break; 629 } 630#endif 631 default: 632 break; 633 } 634 } else if (addr != NULL) { 635 struct sockaddr_in6 *sin6_p; 636 637 /* IPV6_V6ONLY socket */ 638#ifdef INET 639 if (addr->sa_family == AF_INET) { 640 /* can't bind v4 addr to v6 only socket! */ 641 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 642 return (EINVAL); 643 } 644#endif 645 sin6_p = (struct sockaddr_in6 *)addr; 646 647 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 648 /* can't bind v4-mapped addrs either! */ 649 /* NOTE: we don't support SIIT */ 650 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 651 return (EINVAL); 652 } 653 } 654 error = sctp_inpcb_bind(so, addr, NULL, p); 655 return (error); 656} 657 658 659static void 660sctp6_close(struct socket *so) 661{ 662 sctp_close(so); 663} 664 665/* This could be made common with sctp_detach() since they are identical */ 666 667static 668int 669sctp6_disconnect(struct socket *so) 670{ 671 return (sctp_disconnect(so)); 672} 673 674 675int 676sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 677 struct mbuf *control, struct thread *p); 678 679 680static int 681sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 682 struct mbuf *control, struct thread *p) 683{ 684 struct sctp_inpcb *inp; 685 struct in6pcb *inp6; 686 687#ifdef INET 688 struct sockaddr_in6 *sin6; 689#endif /* INET */ 690 /* No SPL needed since sctp_output does this */ 691 692 inp = (struct sctp_inpcb *)so->so_pcb; 693 if (inp == NULL) { 694 if (control) { 695 SCTP_RELEASE_PKT(control); 696 control = NULL; 697 } 698 SCTP_RELEASE_PKT(m); 699 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 700 return (EINVAL); 701 } 702 inp6 = (struct in6pcb *)inp; 703 /* 704 * For the TCP model we may get a NULL addr, if we are a connected 705 * socket thats ok. 706 */ 707 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 708 (addr == NULL)) { 709 goto connected_type; 710 } 711 if (addr == NULL) { 712 SCTP_RELEASE_PKT(m); 713 if (control) { 714 SCTP_RELEASE_PKT(control); 715 control = NULL; 716 } 717 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 718 return (EDESTADDRREQ); 719 } 720#ifdef INET 721 sin6 = (struct sockaddr_in6 *)addr; 722 if (SCTP_IPV6_V6ONLY(inp6)) { 723 /* 724 * if IPV6_V6ONLY flag, we discard datagrams destined to a 725 * v4 addr or v4-mapped addr 726 */ 727 if (addr->sa_family == AF_INET) { 728 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 729 return (EINVAL); 730 } 731 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 732 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 733 return (EINVAL); 734 } 735 } 736 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 737 struct sockaddr_in sin; 738 739 /* convert v4-mapped into v4 addr and send */ 740 in6_sin6_2_sin(&sin, sin6); 741 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 742 } 743#endif /* INET */ 744connected_type: 745 /* now what about control */ 746 if (control) { 747 if (inp->control) { 748 SCTP_PRINTF("huh? control set?\n"); 749 SCTP_RELEASE_PKT(inp->control); 750 inp->control = NULL; 751 } 752 inp->control = control; 753 } 754 /* Place the data */ 755 if (inp->pkt) { 756 SCTP_BUF_NEXT(inp->pkt_last) = m; 757 inp->pkt_last = m; 758 } else { 759 inp->pkt_last = inp->pkt = m; 760 } 761 if ( 762 /* FreeBSD and MacOSX uses a flag passed */ 763 ((flags & PRUS_MORETOCOME) == 0) 764 ) { 765 /* 766 * note with the current version this code will only be used 767 * by OpenBSD, NetBSD and FreeBSD have methods for 768 * re-defining sosend() to use sctp_sosend(). One can 769 * optionaly switch back to this code (by changing back the 770 * defininitions but this is not advisable. 771 */ 772 int ret; 773 774 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 775 inp->pkt = NULL; 776 inp->control = NULL; 777 return (ret); 778 } else { 779 return (0); 780 } 781} 782 783static int 784sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 785{ 786 uint32_t vrf_id; 787 int error = 0; 788 struct sctp_inpcb *inp; 789 struct sctp_tcb *stcb; 790#ifdef INET 791 struct in6pcb *inp6; 792 struct sockaddr_in6 *sin6; 793 union sctp_sockstore store; 794#endif 795 796#ifdef INET 797 inp6 = (struct in6pcb *)so->so_pcb; 798#endif 799 inp = (struct sctp_inpcb *)so->so_pcb; 800 if (inp == NULL) { 801 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 802 return (ECONNRESET); /* I made the same as TCP since we are 803 * not setup? */ 804 } 805 if (addr == NULL) { 806 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 807 return (EINVAL); 808 } 809 switch (addr->sa_family) { 810#ifdef INET 811 case AF_INET: 812 if (addr->sa_len != sizeof(struct sockaddr_in)) { 813 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 814 return (EINVAL); 815 } 816 break; 817#endif 818#ifdef INET6 819 case AF_INET6: 820 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 821 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 822 return (EINVAL); 823 } 824 break; 825#endif 826 default: 827 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 828 return (EINVAL); 829 } 830 831 vrf_id = inp->def_vrf_id; 832 SCTP_ASOC_CREATE_LOCK(inp); 833 SCTP_INP_RLOCK(inp); 834 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 835 SCTP_PCB_FLAGS_UNBOUND) { 836 /* Bind a ephemeral port */ 837 SCTP_INP_RUNLOCK(inp); 838 error = sctp6_bind(so, NULL, p); 839 if (error) { 840 SCTP_ASOC_CREATE_UNLOCK(inp); 841 842 return (error); 843 } 844 SCTP_INP_RLOCK(inp); 845 } 846 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 847 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 848 /* We are already connected AND the TCP model */ 849 SCTP_INP_RUNLOCK(inp); 850 SCTP_ASOC_CREATE_UNLOCK(inp); 851 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 852 return (EADDRINUSE); 853 } 854#ifdef INET 855 sin6 = (struct sockaddr_in6 *)addr; 856 if (SCTP_IPV6_V6ONLY(inp6)) { 857 /* 858 * if IPV6_V6ONLY flag, ignore connections destined to a v4 859 * addr or v4-mapped addr 860 */ 861 if (addr->sa_family == AF_INET) { 862 SCTP_INP_RUNLOCK(inp); 863 SCTP_ASOC_CREATE_UNLOCK(inp); 864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 865 return (EINVAL); 866 } 867 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 868 SCTP_INP_RUNLOCK(inp); 869 SCTP_ASOC_CREATE_UNLOCK(inp); 870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 871 return (EINVAL); 872 } 873 } 874 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 875 /* convert v4-mapped into v4 addr */ 876 in6_sin6_2_sin(&store.sin, sin6); 877 addr = &store.sa; 878 } 879#endif /* INET */ 880 /* Now do we connect? */ 881 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 882 stcb = LIST_FIRST(&inp->sctp_asoc_list); 883 if (stcb) { 884 SCTP_TCB_UNLOCK(stcb); 885 } 886 SCTP_INP_RUNLOCK(inp); 887 } else { 888 SCTP_INP_RUNLOCK(inp); 889 SCTP_INP_WLOCK(inp); 890 SCTP_INP_INCR_REF(inp); 891 SCTP_INP_WUNLOCK(inp); 892 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 893 if (stcb == NULL) { 894 SCTP_INP_WLOCK(inp); 895 SCTP_INP_DECR_REF(inp); 896 SCTP_INP_WUNLOCK(inp); 897 } 898 } 899 900 if (stcb != NULL) { 901 /* Already have or am bring up an association */ 902 SCTP_ASOC_CREATE_UNLOCK(inp); 903 SCTP_TCB_UNLOCK(stcb); 904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 905 return (EALREADY); 906 } 907 /* We are GOOD to go */ 908 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 909 inp->sctp_ep.pre_open_stream_count, 910 inp->sctp_ep.port, p); 911 SCTP_ASOC_CREATE_UNLOCK(inp); 912 if (stcb == NULL) { 913 /* Gak! no memory */ 914 return (error); 915 } 916 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 917 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 918 /* Set the connected flag so we can queue data */ 919 soisconnecting(so); 920 } 921 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 922 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 923 924 /* initialize authentication parameters for the assoc */ 925 sctp_initialize_auth_params(inp, stcb); 926 927 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 928 SCTP_TCB_UNLOCK(stcb); 929 return (error); 930} 931 932static int 933sctp6_getaddr(struct socket *so, struct sockaddr **addr) 934{ 935 struct sockaddr_in6 *sin6; 936 struct sctp_inpcb *inp; 937 uint32_t vrf_id; 938 struct sctp_ifa *sctp_ifa; 939 940 int error; 941 942 /* 943 * Do the malloc first in case it blocks. 944 */ 945 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 946 if (sin6 == NULL) 947 return (ENOMEM); 948 sin6->sin6_family = AF_INET6; 949 sin6->sin6_len = sizeof(*sin6); 950 951 inp = (struct sctp_inpcb *)so->so_pcb; 952 if (inp == NULL) { 953 SCTP_FREE_SONAME(sin6); 954 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 955 return (ECONNRESET); 956 } 957 SCTP_INP_RLOCK(inp); 958 sin6->sin6_port = inp->sctp_lport; 959 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 960 /* For the bound all case you get back 0 */ 961 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 962 struct sctp_tcb *stcb; 963 struct sockaddr_in6 *sin_a6; 964 struct sctp_nets *net; 965 int fnd; 966 967 stcb = LIST_FIRST(&inp->sctp_asoc_list); 968 if (stcb == NULL) { 969 SCTP_INP_RUNLOCK(inp); 970 SCTP_FREE_SONAME(sin6); 971 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 972 return (ENOENT); 973 } 974 fnd = 0; 975 sin_a6 = NULL; 976 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 977 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 978 if (sin_a6 == NULL) 979 /* this will make coverity happy */ 980 continue; 981 982 if (sin_a6->sin6_family == AF_INET6) { 983 fnd = 1; 984 break; 985 } 986 } 987 if ((!fnd) || (sin_a6 == NULL)) { 988 /* punt */ 989 SCTP_INP_RUNLOCK(inp); 990 SCTP_FREE_SONAME(sin6); 991 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 992 return (ENOENT); 993 } 994 vrf_id = inp->def_vrf_id; 995 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 996 if (sctp_ifa) { 997 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 998 } 999 } else { 1000 /* For the bound all case you get back 0 */ 1001 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1002 } 1003 } else { 1004 /* Take the first IPv6 address in the list */ 1005 struct sctp_laddr *laddr; 1006 int fnd = 0; 1007 1008 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1009 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1010 struct sockaddr_in6 *sin_a; 1011 1012 sin_a = &laddr->ifa->address.sin6; 1013 sin6->sin6_addr = sin_a->sin6_addr; 1014 fnd = 1; 1015 break; 1016 } 1017 } 1018 if (!fnd) { 1019 SCTP_FREE_SONAME(sin6); 1020 SCTP_INP_RUNLOCK(inp); 1021 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1022 return (ENOENT); 1023 } 1024 } 1025 SCTP_INP_RUNLOCK(inp); 1026 /* Scoping things for v6 */ 1027 if ((error = sa6_recoverscope(sin6)) != 0) { 1028 SCTP_FREE_SONAME(sin6); 1029 return (error); 1030 } 1031 (*addr) = (struct sockaddr *)sin6; 1032 return (0); 1033} 1034 1035static int 1036sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1037{ 1038 struct sockaddr_in6 *sin6; 1039 int fnd; 1040 struct sockaddr_in6 *sin_a6; 1041 struct sctp_inpcb *inp; 1042 struct sctp_tcb *stcb; 1043 struct sctp_nets *net; 1044 int error; 1045 1046 /* Do the malloc first in case it blocks. */ 1047 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1048 if (sin6 == NULL) 1049 return (ENOMEM); 1050 sin6->sin6_family = AF_INET6; 1051 sin6->sin6_len = sizeof(*sin6); 1052 1053 inp = (struct sctp_inpcb *)so->so_pcb; 1054 if ((inp == NULL) || 1055 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1056 /* UDP type and listeners will drop out here */ 1057 SCTP_FREE_SONAME(sin6); 1058 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1059 return (ENOTCONN); 1060 } 1061 SCTP_INP_RLOCK(inp); 1062 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1063 if (stcb) { 1064 SCTP_TCB_LOCK(stcb); 1065 } 1066 SCTP_INP_RUNLOCK(inp); 1067 if (stcb == NULL) { 1068 SCTP_FREE_SONAME(sin6); 1069 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1070 return (ECONNRESET); 1071 } 1072 fnd = 0; 1073 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1074 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1075 if (sin_a6->sin6_family == AF_INET6) { 1076 fnd = 1; 1077 sin6->sin6_port = stcb->rport; 1078 sin6->sin6_addr = sin_a6->sin6_addr; 1079 break; 1080 } 1081 } 1082 SCTP_TCB_UNLOCK(stcb); 1083 if (!fnd) { 1084 /* No IPv4 address */ 1085 SCTP_FREE_SONAME(sin6); 1086 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1087 return (ENOENT); 1088 } 1089 if ((error = sa6_recoverscope(sin6)) != 0) { 1090 SCTP_FREE_SONAME(sin6); 1091 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1092 return (error); 1093 } 1094 *addr = (struct sockaddr *)sin6; 1095 return (0); 1096} 1097 1098static int 1099sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1100{ 1101 struct in6pcb *inp6 = sotoin6pcb(so); 1102 int error; 1103 1104 if (inp6 == NULL) { 1105 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1106 return (EINVAL); 1107 } 1108 /* allow v6 addresses precedence */ 1109 error = sctp6_getaddr(so, nam); 1110#ifdef INET 1111 if (error) { 1112 struct sockaddr_in6 *sin6; 1113 1114 /* try v4 next if v6 failed */ 1115 error = sctp_ingetaddr(so, nam); 1116 if (error) { 1117 return (error); 1118 } 1119 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1120 if (sin6 == NULL) { 1121 SCTP_FREE_SONAME(*nam); 1122 return (ENOMEM); 1123 } 1124 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1125 SCTP_FREE_SONAME(*nam); 1126 *nam = (struct sockaddr *)sin6; 1127 } 1128#endif 1129 return (error); 1130} 1131 1132 1133static int 1134sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1135{ 1136 struct in6pcb *inp6 = sotoin6pcb(so); 1137 int error; 1138 1139 if (inp6 == NULL) { 1140 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1141 return (EINVAL); 1142 } 1143 /* allow v6 addresses precedence */ 1144 error = sctp6_peeraddr(so, nam); 1145#ifdef INET 1146 if (error) { 1147 struct sockaddr_in6 *sin6; 1148 1149 /* try v4 next if v6 failed */ 1150 error = sctp_peeraddr(so, nam); 1151 if (error) { 1152 return (error); 1153 } 1154 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1155 if (sin6 == NULL) { 1156 SCTP_FREE_SONAME(*nam); 1157 return (ENOMEM); 1158 } 1159 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1160 SCTP_FREE_SONAME(*nam); 1161 *nam = (struct sockaddr *)sin6; 1162 } 1163#endif 1164 return (error); 1165} 1166 1167struct pr_usrreqs sctp6_usrreqs = { 1168 .pru_abort = sctp6_abort, 1169 .pru_accept = sctp_accept, 1170 .pru_attach = sctp6_attach, 1171 .pru_bind = sctp6_bind, 1172 .pru_connect = sctp6_connect, 1173 .pru_control = in6_control, 1174 .pru_close = sctp6_close, 1175 .pru_detach = sctp6_close, 1176 .pru_sopoll = sopoll_generic, 1177 .pru_flush = sctp_flush, 1178 .pru_disconnect = sctp6_disconnect, 1179 .pru_listen = sctp_listen, 1180 .pru_peeraddr = sctp6_getpeeraddr, 1181 .pru_send = sctp6_send, 1182 .pru_shutdown = sctp_shutdown, 1183 .pru_sockaddr = sctp6_in6getaddr, 1184 .pru_sosend = sctp_sosend, 1185 .pru_soreceive = sctp_soreceive 1186}; 1187 1188#endif 1189