sctp6_usrreq.c revision 352057
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: stable/11/sys/netinet6/sctp6_usrreq.c 352057 2019-09-09 11:20:15Z tuexen $"); 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 58extern struct protosw inetsw[]; 59 60int 61sctp6_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 ip6 = mtod(m, struct ip6_hdr *); 107 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 108 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 109 if (sh == NULL) { 110 SCTP_STAT_INCR(sctps_hdrops); 111 return (IPPROTO_DONE); 112 } 113 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 114 offset -= sizeof(struct sctp_chunkhdr); 115 memset(&src, 0, sizeof(struct sockaddr_in6)); 116 src.sin6_family = AF_INET6; 117 src.sin6_len = sizeof(struct sockaddr_in6); 118 src.sin6_port = sh->src_port; 119 src.sin6_addr = ip6->ip6_src; 120 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 121 goto out; 122 } 123 memset(&dst, 0, sizeof(struct sockaddr_in6)); 124 dst.sin6_family = AF_INET6; 125 dst.sin6_len = sizeof(struct sockaddr_in6); 126 dst.sin6_port = sh->dest_port; 127 dst.sin6_addr = ip6->ip6_dst; 128 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 129 goto out; 130 } 131 length = ntohs(ip6->ip6_plen) + iphlen; 132 /* Validate mbuf chain length with IP payload length. */ 133 if (SCTP_HEADER_LEN(m) != length) { 134 SCTPDBG(SCTP_DEBUG_INPUT1, 135 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 136 SCTP_STAT_INCR(sctps_hdrops); 137 goto out; 138 } 139 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 140 goto out; 141 } 142 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 143 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 144 SCTP_STAT_INCR(sctps_recvhwcrc); 145 compute_crc = 0; 146 } else { 147 SCTP_STAT_INCR(sctps_recvswcrc); 148 compute_crc = 1; 149 } 150 sctp_common_input_processing(&m, iphlen, offset, length, 151 (struct sockaddr *)&src, 152 (struct sockaddr *)&dst, 153 sh, ch, 154 compute_crc, 155 ecn_bits, 156 mflowtype, mflowid, fibnum, 157 vrf_id, port); 158out: 159 if (m) { 160 sctp_m_freem(m); 161 } 162 return (IPPROTO_DONE); 163} 164 165 166int 167sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 168{ 169 return (sctp6_input_with_port(i_pak, offp, 0)); 170} 171 172void 173sctp6_notify(struct sctp_inpcb *inp, 174 struct sctp_tcb *stcb, 175 struct sctp_nets *net, 176 uint8_t icmp6_type, 177 uint8_t icmp6_code, 178 uint32_t next_mtu) 179{ 180#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 181 struct socket *so; 182#endif 183 int timer_stopped; 184 185 switch (icmp6_type) { 186 case ICMP6_DST_UNREACH: 187 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || 188 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || 189 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || 190 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { 191 /* Mark the net unreachable. */ 192 if (net->dest_state & SCTP_ADDR_REACHABLE) { 193 /* Ok that destination is not reachable */ 194 net->dest_state &= ~SCTP_ADDR_REACHABLE; 195 net->dest_state &= ~SCTP_ADDR_PF; 196 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 197 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 198 } 199 } 200 SCTP_TCB_UNLOCK(stcb); 201 break; 202 case ICMP6_PARAM_PROB: 203 /* Treat it like an ABORT. */ 204 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { 205 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 206#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 207 so = SCTP_INP_SO(inp); 208 atomic_add_int(&stcb->asoc.refcnt, 1); 209 SCTP_TCB_UNLOCK(stcb); 210 SCTP_SOCKET_LOCK(so, 1); 211 SCTP_TCB_LOCK(stcb); 212 atomic_subtract_int(&stcb->asoc.refcnt, 1); 213#endif 214 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 215 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 216#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 217 SCTP_SOCKET_UNLOCK(so, 1); 218#endif 219 } else { 220 SCTP_TCB_UNLOCK(stcb); 221 } 222 break; 223 case ICMP6_PACKET_TOO_BIG: 224 if (net->dest_state & SCTP_ADDR_NO_PMTUD) { 225 SCTP_TCB_UNLOCK(stcb); 226 break; 227 } 228 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 229 timer_stopped = 1; 230 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 231 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 232 } else { 233 timer_stopped = 0; 234 } 235 /* Update the path MTU. */ 236 if (net->port) { 237 next_mtu -= sizeof(struct udphdr); 238 } 239 if (net->mtu > next_mtu) { 240 net->mtu = next_mtu; 241 } 242 /* Update the association MTU */ 243 if (stcb->asoc.smallest_mtu > next_mtu) { 244 sctp_pathmtu_adjustment(stcb, next_mtu); 245 } 246 /* Finally, start the PMTU timer if it was running before. */ 247 if (timer_stopped) { 248 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 249 } 250 SCTP_TCB_UNLOCK(stcb); 251 break; 252 default: 253 SCTP_TCB_UNLOCK(stcb); 254 break; 255 } 256} 257 258void 259sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 260{ 261 struct ip6ctlparam *ip6cp; 262 struct sctp_inpcb *inp; 263 struct sctp_tcb *stcb; 264 struct sctp_nets *net; 265 struct sctphdr sh; 266 struct sockaddr_in6 src, dst; 267 268 if (pktdst->sa_family != AF_INET6 || 269 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 270 return; 271 } 272 273 if ((unsigned)cmd >= PRC_NCMDS) { 274 return; 275 } 276 if (PRC_IS_REDIRECT(cmd)) { 277 d = NULL; 278 } else if (inet6ctlerrmap[cmd] == 0) { 279 return; 280 } 281 /* If the parameter is from icmp6, decode it. */ 282 if (d != NULL) { 283 ip6cp = (struct ip6ctlparam *)d; 284 } else { 285 ip6cp = (struct ip6ctlparam *)NULL; 286 } 287 288 if (ip6cp != NULL) { 289 /* 290 * XXX: We assume that when IPV6 is non NULL, M and OFF are 291 * valid. 292 */ 293 if (ip6cp->ip6c_m == NULL) { 294 return; 295 } 296 297 /* 298 * Check if we can safely examine the ports and the 299 * verification tag of the SCTP common header. 300 */ 301 if (ip6cp->ip6c_m->m_pkthdr.len < 302 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 303 return; 304 } 305 306 /* Copy out the port numbers and the verification tag. */ 307 memset(&sh, 0, sizeof(sh)); 308 m_copydata(ip6cp->ip6c_m, 309 ip6cp->ip6c_off, 310 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 311 (caddr_t)&sh); 312 memset(&src, 0, sizeof(struct sockaddr_in6)); 313 src.sin6_family = AF_INET6; 314 src.sin6_len = sizeof(struct sockaddr_in6); 315 src.sin6_port = sh.src_port; 316 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 317 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 318 return; 319 } 320 memset(&dst, 0, sizeof(struct sockaddr_in6)); 321 dst.sin6_family = AF_INET6; 322 dst.sin6_len = sizeof(struct sockaddr_in6); 323 dst.sin6_port = sh.dest_port; 324 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 325 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 326 return; 327 } 328 inp = NULL; 329 net = NULL; 330 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 331 (struct sockaddr *)&src, 332 &inp, &net, 1, SCTP_DEFAULT_VRFID); 333 if ((stcb != NULL) && 334 (net != NULL) && 335 (inp != NULL)) { 336 /* Check the verification tag */ 337 if (ntohl(sh.v_tag) != 0) { 338 /* 339 * This must be the verification tag used 340 * for sending out packets. We don't 341 * consider packets reflecting the 342 * verification tag. 343 */ 344 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 345 SCTP_TCB_UNLOCK(stcb); 346 return; 347 } 348 } else { 349 if (ip6cp->ip6c_m->m_pkthdr.len >= 350 ip6cp->ip6c_off + sizeof(struct sctphdr) + 351 sizeof(struct sctp_chunkhdr) + 352 offsetof(struct sctp_init, a_rwnd)) { 353 /* 354 * In this case we can check if we 355 * got an INIT chunk and if the 356 * initiate tag matches. 357 */ 358 uint32_t initiate_tag; 359 uint8_t chunk_type; 360 361 m_copydata(ip6cp->ip6c_m, 362 ip6cp->ip6c_off + 363 sizeof(struct sctphdr), 364 sizeof(uint8_t), 365 (caddr_t)&chunk_type); 366 m_copydata(ip6cp->ip6c_m, 367 ip6cp->ip6c_off + 368 sizeof(struct sctphdr) + 369 sizeof(struct sctp_chunkhdr), 370 sizeof(uint32_t), 371 (caddr_t)&initiate_tag); 372 if ((chunk_type != SCTP_INITIATION) || 373 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 374 SCTP_TCB_UNLOCK(stcb); 375 return; 376 } 377 } else { 378 SCTP_TCB_UNLOCK(stcb); 379 return; 380 } 381 } 382 sctp6_notify(inp, stcb, net, 383 ip6cp->ip6c_icmp6->icmp6_type, 384 ip6cp->ip6c_icmp6->icmp6_code, 385 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 386 } else { 387 if ((stcb == NULL) && (inp != NULL)) { 388 /* reduce inp's ref-count */ 389 SCTP_INP_WLOCK(inp); 390 SCTP_INP_DECR_REF(inp); 391 SCTP_INP_WUNLOCK(inp); 392 } 393 if (stcb) { 394 SCTP_TCB_UNLOCK(stcb); 395 } 396 } 397 } 398} 399 400/* 401 * this routine can probably be collasped into the one in sctp_userreq.c 402 * since they do the same thing and now we lookup with a sockaddr 403 */ 404static int 405sctp6_getcred(SYSCTL_HANDLER_ARGS) 406{ 407 struct xucred xuc; 408 struct sockaddr_in6 addrs[2]; 409 struct sctp_inpcb *inp; 410 struct sctp_nets *net; 411 struct sctp_tcb *stcb; 412 int error; 413 uint32_t vrf_id; 414 415 vrf_id = SCTP_DEFAULT_VRFID; 416 417 error = priv_check(req->td, PRIV_NETINET_GETCRED); 418 if (error) 419 return (error); 420 421 if (req->newlen != sizeof(addrs)) { 422 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 423 return (EINVAL); 424 } 425 if (req->oldlen != sizeof(struct ucred)) { 426 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 427 return (EINVAL); 428 } 429 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 430 if (error) 431 return (error); 432 433 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 434 sin6tosa(&addrs[0]), 435 &inp, &net, 1, vrf_id); 436 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 437 if ((inp != NULL) && (stcb == NULL)) { 438 /* reduce ref-count */ 439 SCTP_INP_WLOCK(inp); 440 SCTP_INP_DECR_REF(inp); 441 goto cred_can_cont; 442 } 443 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 444 error = ENOENT; 445 goto out; 446 } 447 SCTP_TCB_UNLOCK(stcb); 448 /* 449 * We use the write lock here, only since in the error leg we need 450 * it. If we used RLOCK, then we would have to 451 * wlock/decr/unlock/rlock. Which in theory could create a hole. 452 * Better to use higher wlock. 453 */ 454 SCTP_INP_WLOCK(inp); 455cred_can_cont: 456 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 457 if (error) { 458 SCTP_INP_WUNLOCK(inp); 459 goto out; 460 } 461 cru2x(inp->sctp_socket->so_cred, &xuc); 462 SCTP_INP_WUNLOCK(inp); 463 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 464out: 465 return (error); 466} 467 468SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 469 0, 0, 470 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 471 472 473/* This is the same as the sctp_abort() could be made common */ 474static void 475sctp6_abort(struct socket *so) 476{ 477 struct sctp_inpcb *inp; 478 uint32_t flags; 479 480 inp = (struct sctp_inpcb *)so->so_pcb; 481 if (inp == NULL) { 482 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 483 return; 484 } 485sctp_must_try_again: 486 flags = inp->sctp_flags; 487#ifdef SCTP_LOG_CLOSING 488 sctp_log_closing(inp, NULL, 17); 489#endif 490 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 491 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 492#ifdef SCTP_LOG_CLOSING 493 sctp_log_closing(inp, NULL, 16); 494#endif 495 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 496 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 497 SOCK_LOCK(so); 498 SCTP_SB_CLEAR(so->so_snd); 499 /* 500 * same for the rcv ones, they are only here for the 501 * accounting/select. 502 */ 503 SCTP_SB_CLEAR(so->so_rcv); 504 /* Now null out the reference, we are completely detached. */ 505 so->so_pcb = NULL; 506 SOCK_UNLOCK(so); 507 } else { 508 flags = inp->sctp_flags; 509 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 510 goto sctp_must_try_again; 511 } 512 } 513 return; 514} 515 516static int 517sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 518{ 519 struct in6pcb *inp6; 520 int error; 521 struct sctp_inpcb *inp; 522 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 523 524 inp = (struct sctp_inpcb *)so->so_pcb; 525 if (inp != NULL) { 526 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 527 return (EINVAL); 528 } 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 558static int 559sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 560{ 561 struct sctp_inpcb *inp; 562 struct in6pcb *inp6; 563 int error; 564 u_char vflagsav; 565 566 inp = (struct sctp_inpcb *)so->so_pcb; 567 if (inp == NULL) { 568 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 569 return (EINVAL); 570 } 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 vflagsav = inp6->inp_vflag; 597 inp6->inp_vflag &= ~INP_IPV4; 598 inp6->inp_vflag |= INP_IPV6; 599 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 600 switch (addr->sa_family) { 601#ifdef INET 602 case AF_INET: 603 /* binding v4 addr to v6 socket, so reset flags */ 604 inp6->inp_vflag |= INP_IPV4; 605 inp6->inp_vflag &= ~INP_IPV6; 606 break; 607#endif 608#ifdef INET6 609 case AF_INET6: 610 { 611 struct sockaddr_in6 *sin6_p; 612 613 sin6_p = (struct sockaddr_in6 *)addr; 614 615 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 616 inp6->inp_vflag |= INP_IPV4; 617 } 618#ifdef INET 619 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 620 struct sockaddr_in sin; 621 622 in6_sin6_2_sin(&sin, sin6_p); 623 inp6->inp_vflag |= INP_IPV4; 624 inp6->inp_vflag &= ~INP_IPV6; 625 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 626 goto out; 627 } 628#endif 629 break; 630 } 631#endif 632 default: 633 break; 634 } 635 } else if (addr != NULL) { 636 struct sockaddr_in6 *sin6_p; 637 638 /* IPV6_V6ONLY socket */ 639#ifdef INET 640 if (addr->sa_family == AF_INET) { 641 /* can't bind v4 addr to v6 only socket! */ 642 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 643 error = EINVAL; 644 goto out; 645 } 646#endif 647 sin6_p = (struct sockaddr_in6 *)addr; 648 649 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 650 /* can't bind v4-mapped addrs either! */ 651 /* NOTE: we don't support SIIT */ 652 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 653 error = EINVAL; 654 goto out; 655 } 656 } 657 error = sctp_inpcb_bind(so, addr, NULL, p); 658out: 659 if (error != 0) 660 inp6->inp_vflag = vflagsav; 661 return (error); 662} 663 664 665static void 666sctp6_close(struct socket *so) 667{ 668 sctp_close(so); 669} 670 671/* This could be made common with sctp_detach() since they are identical */ 672 673static 674int 675sctp6_disconnect(struct socket *so) 676{ 677 return (sctp_disconnect(so)); 678} 679 680 681int 682sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 683 struct mbuf *control, struct thread *p); 684 685 686static int 687sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 688 struct mbuf *control, struct thread *p) 689{ 690 struct sctp_inpcb *inp; 691 struct in6pcb *inp6; 692 693#ifdef INET 694 struct sockaddr_in6 *sin6; 695#endif /* INET */ 696 /* No SPL needed since sctp_output does this */ 697 698 inp = (struct sctp_inpcb *)so->so_pcb; 699 if (inp == NULL) { 700 if (control) { 701 SCTP_RELEASE_PKT(control); 702 control = NULL; 703 } 704 SCTP_RELEASE_PKT(m); 705 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 706 return (EINVAL); 707 } 708 inp6 = (struct in6pcb *)inp; 709 /* 710 * For the TCP model we may get a NULL addr, if we are a connected 711 * socket thats ok. 712 */ 713 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 714 (addr == NULL)) { 715 goto connected_type; 716 } 717 if (addr == NULL) { 718 SCTP_RELEASE_PKT(m); 719 if (control) { 720 SCTP_RELEASE_PKT(control); 721 control = NULL; 722 } 723 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 724 return (EDESTADDRREQ); 725 } 726#ifdef INET 727 sin6 = (struct sockaddr_in6 *)addr; 728 if (SCTP_IPV6_V6ONLY(inp6)) { 729 /* 730 * if IPV6_V6ONLY flag, we discard datagrams destined to a 731 * v4 addr or v4-mapped addr 732 */ 733 if (addr->sa_family == AF_INET) { 734 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 735 return (EINVAL); 736 } 737 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 738 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 739 return (EINVAL); 740 } 741 } 742 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 743 struct sockaddr_in sin; 744 745 /* convert v4-mapped into v4 addr and send */ 746 in6_sin6_2_sin(&sin, sin6); 747 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 748 } 749#endif /* INET */ 750connected_type: 751 /* now what about control */ 752 if (control) { 753 if (inp->control) { 754 SCTP_PRINTF("huh? control set?\n"); 755 SCTP_RELEASE_PKT(inp->control); 756 inp->control = NULL; 757 } 758 inp->control = control; 759 } 760 /* Place the data */ 761 if (inp->pkt) { 762 SCTP_BUF_NEXT(inp->pkt_last) = m; 763 inp->pkt_last = m; 764 } else { 765 inp->pkt_last = inp->pkt = m; 766 } 767 if ( 768 /* FreeBSD and MacOSX uses a flag passed */ 769 ((flags & PRUS_MORETOCOME) == 0) 770 ) { 771 /* 772 * note with the current version this code will only be used 773 * by OpenBSD, NetBSD and FreeBSD have methods for 774 * re-defining sosend() to use sctp_sosend(). One can 775 * optionaly switch back to this code (by changing back the 776 * defininitions but this is not advisable. 777 */ 778 int ret; 779 780 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 781 inp->pkt = NULL; 782 inp->control = NULL; 783 return (ret); 784 } else { 785 return (0); 786 } 787} 788 789static int 790sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 791{ 792 uint32_t vrf_id; 793 int error = 0; 794 struct sctp_inpcb *inp; 795 struct sctp_tcb *stcb; 796#ifdef INET 797 struct in6pcb *inp6; 798 struct sockaddr_in6 *sin6; 799 union sctp_sockstore store; 800#endif 801 802#ifdef INET 803 inp6 = (struct in6pcb *)so->so_pcb; 804#endif 805 inp = (struct sctp_inpcb *)so->so_pcb; 806 if (inp == NULL) { 807 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 808 return (ECONNRESET); /* I made the same as TCP since we are 809 * not setup? */ 810 } 811 if (addr == NULL) { 812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 813 return (EINVAL); 814 } 815 switch (addr->sa_family) { 816#ifdef INET 817 case AF_INET: 818 if (addr->sa_len != sizeof(struct sockaddr_in)) { 819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 820 return (EINVAL); 821 } 822 break; 823#endif 824#ifdef INET6 825 case AF_INET6: 826 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 827 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 828 return (EINVAL); 829 } 830 break; 831#endif 832 default: 833 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 834 return (EINVAL); 835 } 836 837 vrf_id = inp->def_vrf_id; 838 SCTP_ASOC_CREATE_LOCK(inp); 839 SCTP_INP_RLOCK(inp); 840 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 841 SCTP_PCB_FLAGS_UNBOUND) { 842 /* Bind a ephemeral port */ 843 SCTP_INP_RUNLOCK(inp); 844 error = sctp6_bind(so, NULL, p); 845 if (error) { 846 SCTP_ASOC_CREATE_UNLOCK(inp); 847 848 return (error); 849 } 850 SCTP_INP_RLOCK(inp); 851 } 852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 853 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 854 /* We are already connected AND the TCP model */ 855 SCTP_INP_RUNLOCK(inp); 856 SCTP_ASOC_CREATE_UNLOCK(inp); 857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 858 return (EADDRINUSE); 859 } 860#ifdef INET 861 sin6 = (struct sockaddr_in6 *)addr; 862 if (SCTP_IPV6_V6ONLY(inp6)) { 863 /* 864 * if IPV6_V6ONLY flag, ignore connections destined to a v4 865 * addr or v4-mapped addr 866 */ 867 if (addr->sa_family == AF_INET) { 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 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 874 SCTP_INP_RUNLOCK(inp); 875 SCTP_ASOC_CREATE_UNLOCK(inp); 876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 877 return (EINVAL); 878 } 879 } 880 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 881 /* convert v4-mapped into v4 addr */ 882 in6_sin6_2_sin(&store.sin, sin6); 883 addr = &store.sa; 884 } 885#endif /* INET */ 886 /* Now do we connect? */ 887 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 888 stcb = LIST_FIRST(&inp->sctp_asoc_list); 889 if (stcb) { 890 SCTP_TCB_LOCK(stcb); 891 } 892 SCTP_INP_RUNLOCK(inp); 893 } else { 894 SCTP_INP_RUNLOCK(inp); 895 SCTP_INP_WLOCK(inp); 896 SCTP_INP_INCR_REF(inp); 897 SCTP_INP_WUNLOCK(inp); 898 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 899 if (stcb == NULL) { 900 SCTP_INP_WLOCK(inp); 901 SCTP_INP_DECR_REF(inp); 902 SCTP_INP_WUNLOCK(inp); 903 } 904 } 905 906 if (stcb != NULL) { 907 /* Already have or am bring up an association */ 908 SCTP_ASOC_CREATE_UNLOCK(inp); 909 SCTP_TCB_UNLOCK(stcb); 910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 911 return (EALREADY); 912 } 913 /* We are GOOD to go */ 914 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 915 inp->sctp_ep.pre_open_stream_count, 916 inp->sctp_ep.port, p, 917 SCTP_INITIALIZE_AUTH_PARAMS); 918 SCTP_ASOC_CREATE_UNLOCK(inp); 919 if (stcb == NULL) { 920 /* Gak! no memory */ 921 return (error); 922 } 923 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 924 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 925 /* Set the connected flag so we can queue data */ 926 soisconnecting(so); 927 } 928 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); 929 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 930 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 931 SCTP_TCB_UNLOCK(stcb); 932 return (error); 933} 934 935static int 936sctp6_getaddr(struct socket *so, struct sockaddr **addr) 937{ 938 struct sockaddr_in6 *sin6; 939 struct sctp_inpcb *inp; 940 uint32_t vrf_id; 941 struct sctp_ifa *sctp_ifa; 942 943 int error; 944 945 /* 946 * Do the malloc first in case it blocks. 947 */ 948 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 949 if (sin6 == NULL) 950 return (ENOMEM); 951 sin6->sin6_family = AF_INET6; 952 sin6->sin6_len = sizeof(*sin6); 953 954 inp = (struct sctp_inpcb *)so->so_pcb; 955 if (inp == NULL) { 956 SCTP_FREE_SONAME(sin6); 957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 958 return (ECONNRESET); 959 } 960 SCTP_INP_RLOCK(inp); 961 sin6->sin6_port = inp->sctp_lport; 962 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 963 /* For the bound all case you get back 0 */ 964 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 965 struct sctp_tcb *stcb; 966 struct sockaddr_in6 *sin_a6; 967 struct sctp_nets *net; 968 int fnd; 969 970 stcb = LIST_FIRST(&inp->sctp_asoc_list); 971 if (stcb == NULL) { 972 SCTP_INP_RUNLOCK(inp); 973 SCTP_FREE_SONAME(sin6); 974 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 975 return (ENOENT); 976 } 977 fnd = 0; 978 sin_a6 = NULL; 979 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 980 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 981 if (sin_a6 == NULL) 982 /* this will make coverity happy */ 983 continue; 984 985 if (sin_a6->sin6_family == AF_INET6) { 986 fnd = 1; 987 break; 988 } 989 } 990 if ((!fnd) || (sin_a6 == NULL)) { 991 /* punt */ 992 SCTP_INP_RUNLOCK(inp); 993 SCTP_FREE_SONAME(sin6); 994 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 995 return (ENOENT); 996 } 997 vrf_id = inp->def_vrf_id; 998 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 999 if (sctp_ifa) { 1000 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1001 } 1002 } else { 1003 /* For the bound all case you get back 0 */ 1004 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1005 } 1006 } else { 1007 /* Take the first IPv6 address in the list */ 1008 struct sctp_laddr *laddr; 1009 int fnd = 0; 1010 1011 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1012 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1013 struct sockaddr_in6 *sin_a; 1014 1015 sin_a = &laddr->ifa->address.sin6; 1016 sin6->sin6_addr = sin_a->sin6_addr; 1017 fnd = 1; 1018 break; 1019 } 1020 } 1021 if (!fnd) { 1022 SCTP_FREE_SONAME(sin6); 1023 SCTP_INP_RUNLOCK(inp); 1024 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1025 return (ENOENT); 1026 } 1027 } 1028 SCTP_INP_RUNLOCK(inp); 1029 /* Scoping things for v6 */ 1030 if ((error = sa6_recoverscope(sin6)) != 0) { 1031 SCTP_FREE_SONAME(sin6); 1032 return (error); 1033 } 1034 (*addr) = (struct sockaddr *)sin6; 1035 return (0); 1036} 1037 1038static int 1039sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1040{ 1041 struct sockaddr_in6 *sin6; 1042 int fnd; 1043 struct sockaddr_in6 *sin_a6; 1044 struct sctp_inpcb *inp; 1045 struct sctp_tcb *stcb; 1046 struct sctp_nets *net; 1047 int error; 1048 1049 /* Do the malloc first in case it blocks. */ 1050 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1051 if (sin6 == NULL) 1052 return (ENOMEM); 1053 sin6->sin6_family = AF_INET6; 1054 sin6->sin6_len = sizeof(*sin6); 1055 1056 inp = (struct sctp_inpcb *)so->so_pcb; 1057 if ((inp == NULL) || 1058 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1059 /* UDP type and listeners will drop out here */ 1060 SCTP_FREE_SONAME(sin6); 1061 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1062 return (ENOTCONN); 1063 } 1064 SCTP_INP_RLOCK(inp); 1065 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1066 if (stcb) { 1067 SCTP_TCB_LOCK(stcb); 1068 } 1069 SCTP_INP_RUNLOCK(inp); 1070 if (stcb == NULL) { 1071 SCTP_FREE_SONAME(sin6); 1072 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1073 return (ECONNRESET); 1074 } 1075 fnd = 0; 1076 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1077 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1078 if (sin_a6->sin6_family == AF_INET6) { 1079 fnd = 1; 1080 sin6->sin6_port = stcb->rport; 1081 sin6->sin6_addr = sin_a6->sin6_addr; 1082 break; 1083 } 1084 } 1085 SCTP_TCB_UNLOCK(stcb); 1086 if (!fnd) { 1087 /* No IPv4 address */ 1088 SCTP_FREE_SONAME(sin6); 1089 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1090 return (ENOENT); 1091 } 1092 if ((error = sa6_recoverscope(sin6)) != 0) { 1093 SCTP_FREE_SONAME(sin6); 1094 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1095 return (error); 1096 } 1097 *addr = (struct sockaddr *)sin6; 1098 return (0); 1099} 1100 1101static int 1102sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1103{ 1104 struct in6pcb *inp6 = sotoin6pcb(so); 1105 int error; 1106 1107 if (inp6 == NULL) { 1108 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1109 return (EINVAL); 1110 } 1111 1112 /* allow v6 addresses precedence */ 1113 error = sctp6_getaddr(so, nam); 1114#ifdef INET 1115 if (error) { 1116 struct sockaddr_in6 *sin6; 1117 1118 /* try v4 next if v6 failed */ 1119 error = sctp_ingetaddr(so, nam); 1120 if (error) { 1121 return (error); 1122 } 1123 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1124 if (sin6 == NULL) { 1125 SCTP_FREE_SONAME(*nam); 1126 return (ENOMEM); 1127 } 1128 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1129 SCTP_FREE_SONAME(*nam); 1130 *nam = (struct sockaddr *)sin6; 1131 } 1132#endif 1133 return (error); 1134} 1135 1136 1137static int 1138sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1139{ 1140 struct in6pcb *inp6 = sotoin6pcb(so); 1141 int error; 1142 1143 if (inp6 == NULL) { 1144 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1145 return (EINVAL); 1146 } 1147 1148 /* allow v6 addresses precedence */ 1149 error = sctp6_peeraddr(so, nam); 1150#ifdef INET 1151 if (error) { 1152 struct sockaddr_in6 *sin6; 1153 1154 /* try v4 next if v6 failed */ 1155 error = sctp_peeraddr(so, nam); 1156 if (error) { 1157 return (error); 1158 } 1159 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1160 if (sin6 == NULL) { 1161 SCTP_FREE_SONAME(*nam); 1162 return (ENOMEM); 1163 } 1164 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1165 SCTP_FREE_SONAME(*nam); 1166 *nam = (struct sockaddr *)sin6; 1167 } 1168#endif 1169 return (error); 1170} 1171 1172struct pr_usrreqs sctp6_usrreqs = { 1173 .pru_abort = sctp6_abort, 1174 .pru_accept = sctp_accept, 1175 .pru_attach = sctp6_attach, 1176 .pru_bind = sctp6_bind, 1177 .pru_connect = sctp6_connect, 1178 .pru_control = in6_control, 1179 .pru_close = sctp6_close, 1180 .pru_detach = sctp6_close, 1181 .pru_sopoll = sopoll_generic, 1182 .pru_flush = sctp_flush, 1183 .pru_disconnect = sctp6_disconnect, 1184 .pru_listen = sctp_listen, 1185 .pru_peeraddr = sctp6_getpeeraddr, 1186 .pru_send = sctp6_send, 1187 .pru_shutdown = sctp_shutdown, 1188 .pru_sockaddr = sctp6_in6getaddr, 1189 .pru_sosend = sctp_sosend, 1190 .pru_soreceive = sctp_soreceive 1191}; 1192 1193#endif 1194