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 360750 2020-05-07 02:31:24Z 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 if (net->port) { 242 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); 243 } else { 244 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); 245 } 246 } 247 /* Update the association MTU */ 248 if (stcb->asoc.smallest_mtu > next_mtu) { 249 sctp_pathmtu_adjustment(stcb, next_mtu); 250 } 251 /* Finally, start the PMTU timer if it was running before. */ 252 if (timer_stopped) { 253 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 254 } 255 SCTP_TCB_UNLOCK(stcb); 256 break; 257 default: 258 SCTP_TCB_UNLOCK(stcb); 259 break; 260 } 261} 262 263void 264sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 265{ 266 struct ip6ctlparam *ip6cp; 267 struct sctp_inpcb *inp; 268 struct sctp_tcb *stcb; 269 struct sctp_nets *net; 270 struct sctphdr sh; 271 struct sockaddr_in6 src, dst; 272 273 if (pktdst->sa_family != AF_INET6 || 274 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 275 return; 276 } 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 /* 303 * Check if we can safely examine the ports and the 304 * verification tag of the SCTP common header. 305 */ 306 if (ip6cp->ip6c_m->m_pkthdr.len < 307 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 308 return; 309 } 310 311 /* Copy out the port numbers and the verification tag. */ 312 memset(&sh, 0, sizeof(sh)); 313 m_copydata(ip6cp->ip6c_m, 314 ip6cp->ip6c_off, 315 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 316 (caddr_t)&sh); 317 memset(&src, 0, sizeof(struct sockaddr_in6)); 318 src.sin6_family = AF_INET6; 319 src.sin6_len = sizeof(struct sockaddr_in6); 320 src.sin6_port = sh.src_port; 321 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 322 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 323 return; 324 } 325 memset(&dst, 0, sizeof(struct sockaddr_in6)); 326 dst.sin6_family = AF_INET6; 327 dst.sin6_len = sizeof(struct sockaddr_in6); 328 dst.sin6_port = sh.dest_port; 329 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 330 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 331 return; 332 } 333 inp = NULL; 334 net = NULL; 335 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 336 (struct sockaddr *)&src, 337 &inp, &net, 1, SCTP_DEFAULT_VRFID); 338 if ((stcb != NULL) && 339 (net != NULL) && 340 (inp != NULL)) { 341 /* Check the verification tag */ 342 if (ntohl(sh.v_tag) != 0) { 343 /* 344 * This must be the verification tag used 345 * for sending out packets. We don't 346 * consider packets reflecting the 347 * verification tag. 348 */ 349 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 350 SCTP_TCB_UNLOCK(stcb); 351 return; 352 } 353 } else { 354 if (ip6cp->ip6c_m->m_pkthdr.len >= 355 ip6cp->ip6c_off + sizeof(struct sctphdr) + 356 sizeof(struct sctp_chunkhdr) + 357 offsetof(struct sctp_init, a_rwnd)) { 358 /* 359 * In this case we can check if we 360 * got an INIT chunk and if the 361 * initiate tag matches. 362 */ 363 uint32_t initiate_tag; 364 uint8_t chunk_type; 365 366 m_copydata(ip6cp->ip6c_m, 367 ip6cp->ip6c_off + 368 sizeof(struct sctphdr), 369 sizeof(uint8_t), 370 (caddr_t)&chunk_type); 371 m_copydata(ip6cp->ip6c_m, 372 ip6cp->ip6c_off + 373 sizeof(struct sctphdr) + 374 sizeof(struct sctp_chunkhdr), 375 sizeof(uint32_t), 376 (caddr_t)&initiate_tag); 377 if ((chunk_type != SCTP_INITIATION) || 378 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 379 SCTP_TCB_UNLOCK(stcb); 380 return; 381 } 382 } else { 383 SCTP_TCB_UNLOCK(stcb); 384 return; 385 } 386 } 387 sctp6_notify(inp, stcb, net, 388 ip6cp->ip6c_icmp6->icmp6_type, 389 ip6cp->ip6c_icmp6->icmp6_code, 390 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 391 } else { 392 if ((stcb == NULL) && (inp != NULL)) { 393 /* reduce inp's ref-count */ 394 SCTP_INP_WLOCK(inp); 395 SCTP_INP_DECR_REF(inp); 396 SCTP_INP_WUNLOCK(inp); 397 } 398 if (stcb) { 399 SCTP_TCB_UNLOCK(stcb); 400 } 401 } 402 } 403} 404 405/* 406 * this routine can probably be collasped into the one in sctp_userreq.c 407 * since they do the same thing and now we lookup with a sockaddr 408 */ 409static int 410sctp6_getcred(SYSCTL_HANDLER_ARGS) 411{ 412 struct xucred xuc; 413 struct sockaddr_in6 addrs[2]; 414 struct sctp_inpcb *inp; 415 struct sctp_nets *net; 416 struct sctp_tcb *stcb; 417 int error; 418 uint32_t vrf_id; 419 420 vrf_id = SCTP_DEFAULT_VRFID; 421 422 error = priv_check(req->td, PRIV_NETINET_GETCRED); 423 if (error) 424 return (error); 425 426 if (req->newlen != sizeof(addrs)) { 427 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 428 return (EINVAL); 429 } 430 if (req->oldlen != sizeof(struct ucred)) { 431 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 432 return (EINVAL); 433 } 434 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 435 if (error) 436 return (error); 437 438 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 439 sin6tosa(&addrs[0]), 440 &inp, &net, 1, vrf_id); 441 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 442 if ((inp != NULL) && (stcb == NULL)) { 443 /* reduce ref-count */ 444 SCTP_INP_WLOCK(inp); 445 SCTP_INP_DECR_REF(inp); 446 goto cred_can_cont; 447 } 448 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 449 error = ENOENT; 450 goto out; 451 } 452 SCTP_TCB_UNLOCK(stcb); 453 /* 454 * We use the write lock here, only since in the error leg we need 455 * it. If we used RLOCK, then we would have to 456 * wlock/decr/unlock/rlock. Which in theory could create a hole. 457 * Better to use higher wlock. 458 */ 459 SCTP_INP_WLOCK(inp); 460cred_can_cont: 461 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 462 if (error) { 463 SCTP_INP_WUNLOCK(inp); 464 goto out; 465 } 466 cru2x(inp->sctp_socket->so_cred, &xuc); 467 SCTP_INP_WUNLOCK(inp); 468 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 469out: 470 return (error); 471} 472 473SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 474 0, 0, 475 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 476 477 478/* This is the same as the sctp_abort() could be made common */ 479static void 480sctp6_abort(struct socket *so) 481{ 482 struct sctp_inpcb *inp; 483 uint32_t flags; 484 485 inp = (struct sctp_inpcb *)so->so_pcb; 486 if (inp == NULL) { 487 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 488 return; 489 } 490sctp_must_try_again: 491 flags = inp->sctp_flags; 492#ifdef SCTP_LOG_CLOSING 493 sctp_log_closing(inp, NULL, 17); 494#endif 495 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 496 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 497#ifdef SCTP_LOG_CLOSING 498 sctp_log_closing(inp, NULL, 16); 499#endif 500 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 501 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 502 SOCK_LOCK(so); 503 SCTP_SB_CLEAR(so->so_snd); 504 /* 505 * same for the rcv ones, they are only here for the 506 * accounting/select. 507 */ 508 SCTP_SB_CLEAR(so->so_rcv); 509 /* Now null out the reference, we are completely detached. */ 510 so->so_pcb = NULL; 511 SOCK_UNLOCK(so); 512 } else { 513 flags = inp->sctp_flags; 514 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 515 goto sctp_must_try_again; 516 } 517 } 518 return; 519} 520 521static int 522sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 523{ 524 struct in6pcb *inp6; 525 int error; 526 struct sctp_inpcb *inp; 527 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 528 529 inp = (struct sctp_inpcb *)so->so_pcb; 530 if (inp != NULL) { 531 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 532 return (EINVAL); 533 } 534 535 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 536 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 537 if (error) 538 return (error); 539 } 540 error = sctp_inpcb_alloc(so, vrf_id); 541 if (error) 542 return (error); 543 inp = (struct sctp_inpcb *)so->so_pcb; 544 SCTP_INP_WLOCK(inp); 545 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 546 inp6 = (struct in6pcb *)inp; 547 548 inp6->inp_vflag |= INP_IPV6; 549 inp6->in6p_hops = -1; /* use kernel default */ 550 inp6->in6p_cksum = -1; /* just to be sure */ 551#ifdef INET 552 /* 553 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 554 * socket as well, because the socket may be bound to an IPv6 555 * wildcard address, which may match an IPv4-mapped IPv6 address. 556 */ 557 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 558#endif 559 SCTP_INP_WUNLOCK(inp); 560 return (0); 561} 562 563static int 564sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 565{ 566 struct sctp_inpcb *inp; 567 struct in6pcb *inp6; 568 int error; 569 u_char vflagsav; 570 571 inp = (struct sctp_inpcb *)so->so_pcb; 572 if (inp == NULL) { 573 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 574 return (EINVAL); 575 } 576 577 if (addr) { 578 switch (addr->sa_family) { 579#ifdef INET 580 case AF_INET: 581 if (addr->sa_len != sizeof(struct sockaddr_in)) { 582 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 583 return (EINVAL); 584 } 585 break; 586#endif 587#ifdef INET6 588 case AF_INET6: 589 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 590 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 591 return (EINVAL); 592 } 593 break; 594#endif 595 default: 596 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 597 return (EINVAL); 598 } 599 } 600 inp6 = (struct in6pcb *)inp; 601 vflagsav = inp6->inp_vflag; 602 inp6->inp_vflag &= ~INP_IPV4; 603 inp6->inp_vflag |= INP_IPV6; 604 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 605 switch (addr->sa_family) { 606#ifdef INET 607 case AF_INET: 608 /* binding v4 addr to v6 socket, so reset flags */ 609 inp6->inp_vflag |= INP_IPV4; 610 inp6->inp_vflag &= ~INP_IPV6; 611 break; 612#endif 613#ifdef INET6 614 case AF_INET6: 615 { 616 struct sockaddr_in6 *sin6_p; 617 618 sin6_p = (struct sockaddr_in6 *)addr; 619 620 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 621 inp6->inp_vflag |= INP_IPV4; 622 } 623#ifdef INET 624 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 625 struct sockaddr_in sin; 626 627 in6_sin6_2_sin(&sin, sin6_p); 628 inp6->inp_vflag |= INP_IPV4; 629 inp6->inp_vflag &= ~INP_IPV6; 630 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 631 goto out; 632 } 633#endif 634 break; 635 } 636#endif 637 default: 638 break; 639 } 640 } else if (addr != NULL) { 641 struct sockaddr_in6 *sin6_p; 642 643 /* IPV6_V6ONLY socket */ 644#ifdef INET 645 if (addr->sa_family == AF_INET) { 646 /* can't bind v4 addr to v6 only socket! */ 647 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 648 error = EINVAL; 649 goto out; 650 } 651#endif 652 sin6_p = (struct sockaddr_in6 *)addr; 653 654 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 655 /* can't bind v4-mapped addrs either! */ 656 /* NOTE: we don't support SIIT */ 657 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 658 error = EINVAL; 659 goto out; 660 } 661 } 662 error = sctp_inpcb_bind(so, addr, NULL, p); 663out: 664 if (error != 0) 665 inp6->inp_vflag = vflagsav; 666 return (error); 667} 668 669 670static void 671sctp6_close(struct socket *so) 672{ 673 sctp_close(so); 674} 675 676/* This could be made common with sctp_detach() since they are identical */ 677 678static 679int 680sctp6_disconnect(struct socket *so) 681{ 682 return (sctp_disconnect(so)); 683} 684 685 686int 687sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 688 struct mbuf *control, struct thread *p); 689 690 691static int 692sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 693 struct mbuf *control, struct thread *p) 694{ 695 struct sctp_inpcb *inp; 696 struct in6pcb *inp6; 697 698#ifdef INET 699 struct sockaddr_in6 *sin6; 700#endif /* INET */ 701 /* No SPL needed since sctp_output does this */ 702 703 inp = (struct sctp_inpcb *)so->so_pcb; 704 if (inp == NULL) { 705 if (control) { 706 SCTP_RELEASE_PKT(control); 707 control = NULL; 708 } 709 SCTP_RELEASE_PKT(m); 710 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 711 return (EINVAL); 712 } 713 inp6 = (struct in6pcb *)inp; 714 /* 715 * For the TCP model we may get a NULL addr, if we are a connected 716 * socket thats ok. 717 */ 718 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 719 (addr == NULL)) { 720 goto connected_type; 721 } 722 if (addr == NULL) { 723 SCTP_RELEASE_PKT(m); 724 if (control) { 725 SCTP_RELEASE_PKT(control); 726 control = NULL; 727 } 728 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 729 return (EDESTADDRREQ); 730 } 731#ifdef INET 732 sin6 = (struct sockaddr_in6 *)addr; 733 if (SCTP_IPV6_V6ONLY(inp6)) { 734 /* 735 * if IPV6_V6ONLY flag, we discard datagrams destined to a 736 * v4 addr or v4-mapped addr 737 */ 738 if (addr->sa_family == AF_INET) { 739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 740 return (EINVAL); 741 } 742 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 744 return (EINVAL); 745 } 746 } 747 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 748 struct sockaddr_in sin; 749 750 /* convert v4-mapped into v4 addr and send */ 751 in6_sin6_2_sin(&sin, sin6); 752 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 753 } 754#endif /* INET */ 755connected_type: 756 /* now what about control */ 757 if (control) { 758 if (inp->control) { 759 SCTP_PRINTF("huh? control set?\n"); 760 SCTP_RELEASE_PKT(inp->control); 761 inp->control = NULL; 762 } 763 inp->control = control; 764 } 765 /* Place the data */ 766 if (inp->pkt) { 767 SCTP_BUF_NEXT(inp->pkt_last) = m; 768 inp->pkt_last = m; 769 } else { 770 inp->pkt_last = inp->pkt = m; 771 } 772 if ( 773 /* FreeBSD and MacOSX uses a flag passed */ 774 ((flags & PRUS_MORETOCOME) == 0) 775 ) { 776 /* 777 * note with the current version this code will only be used 778 * by OpenBSD, NetBSD and FreeBSD have methods for 779 * re-defining sosend() to use sctp_sosend(). One can 780 * optionaly switch back to this code (by changing back the 781 * defininitions but this is not advisable. 782 */ 783 int ret; 784 785 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 786 inp->pkt = NULL; 787 inp->control = NULL; 788 return (ret); 789 } else { 790 return (0); 791 } 792} 793 794static int 795sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 796{ 797 uint32_t vrf_id; 798 int error = 0; 799 struct sctp_inpcb *inp; 800 struct sctp_tcb *stcb; 801#ifdef INET 802 struct in6pcb *inp6; 803 struct sockaddr_in6 *sin6; 804 union sctp_sockstore store; 805#endif 806 807#ifdef INET 808 inp6 = (struct in6pcb *)so->so_pcb; 809#endif 810 inp = (struct sctp_inpcb *)so->so_pcb; 811 if (inp == NULL) { 812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 813 return (ECONNRESET); /* I made the same as TCP since we are 814 * not setup? */ 815 } 816 if (addr == NULL) { 817 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 818 return (EINVAL); 819 } 820 switch (addr->sa_family) { 821#ifdef INET 822 case AF_INET: 823 if (addr->sa_len != sizeof(struct sockaddr_in)) { 824 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 825 return (EINVAL); 826 } 827 break; 828#endif 829#ifdef INET6 830 case AF_INET6: 831 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 833 return (EINVAL); 834 } 835 break; 836#endif 837 default: 838 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 839 return (EINVAL); 840 } 841 842 vrf_id = inp->def_vrf_id; 843 SCTP_ASOC_CREATE_LOCK(inp); 844 SCTP_INP_RLOCK(inp); 845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 846 SCTP_PCB_FLAGS_UNBOUND) { 847 /* Bind a ephemeral port */ 848 SCTP_INP_RUNLOCK(inp); 849 error = sctp6_bind(so, NULL, p); 850 if (error) { 851 SCTP_ASOC_CREATE_UNLOCK(inp); 852 853 return (error); 854 } 855 SCTP_INP_RLOCK(inp); 856 } 857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 858 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 859 /* We are already connected AND the TCP model */ 860 SCTP_INP_RUNLOCK(inp); 861 SCTP_ASOC_CREATE_UNLOCK(inp); 862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 863 return (EADDRINUSE); 864 } 865#ifdef INET 866 sin6 = (struct sockaddr_in6 *)addr; 867 if (SCTP_IPV6_V6ONLY(inp6)) { 868 /* 869 * if IPV6_V6ONLY flag, ignore connections destined to a v4 870 * addr or v4-mapped addr 871 */ 872 if (addr->sa_family == AF_INET) { 873 SCTP_INP_RUNLOCK(inp); 874 SCTP_ASOC_CREATE_UNLOCK(inp); 875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 876 return (EINVAL); 877 } 878 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 879 SCTP_INP_RUNLOCK(inp); 880 SCTP_ASOC_CREATE_UNLOCK(inp); 881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 882 return (EINVAL); 883 } 884 } 885 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 886 /* convert v4-mapped into v4 addr */ 887 in6_sin6_2_sin(&store.sin, sin6); 888 addr = &store.sa; 889 } 890#endif /* INET */ 891 /* Now do we connect? */ 892 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 893 stcb = LIST_FIRST(&inp->sctp_asoc_list); 894 if (stcb) { 895 SCTP_TCB_LOCK(stcb); 896 } 897 SCTP_INP_RUNLOCK(inp); 898 } else { 899 SCTP_INP_RUNLOCK(inp); 900 SCTP_INP_WLOCK(inp); 901 SCTP_INP_INCR_REF(inp); 902 SCTP_INP_WUNLOCK(inp); 903 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 904 if (stcb == NULL) { 905 SCTP_INP_WLOCK(inp); 906 SCTP_INP_DECR_REF(inp); 907 SCTP_INP_WUNLOCK(inp); 908 } 909 } 910 911 if (stcb != NULL) { 912 /* Already have or am bring up an association */ 913 SCTP_ASOC_CREATE_UNLOCK(inp); 914 SCTP_TCB_UNLOCK(stcb); 915 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 916 return (EALREADY); 917 } 918 /* We are GOOD to go */ 919 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 920 inp->sctp_ep.pre_open_stream_count, 921 inp->sctp_ep.port, p, 922 SCTP_INITIALIZE_AUTH_PARAMS); 923 SCTP_ASOC_CREATE_UNLOCK(inp); 924 if (stcb == NULL) { 925 /* Gak! no memory */ 926 return (error); 927 } 928 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 929 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 930 /* Set the connected flag so we can queue data */ 931 soisconnecting(so); 932 } 933 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); 934 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 935 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 936 SCTP_TCB_UNLOCK(stcb); 937 return (error); 938} 939 940static int 941sctp6_getaddr(struct socket *so, struct sockaddr **addr) 942{ 943 struct sockaddr_in6 *sin6; 944 struct sctp_inpcb *inp; 945 uint32_t vrf_id; 946 struct sctp_ifa *sctp_ifa; 947 948 int error; 949 950 /* 951 * Do the malloc first in case it blocks. 952 */ 953 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 954 if (sin6 == NULL) 955 return (ENOMEM); 956 sin6->sin6_family = AF_INET6; 957 sin6->sin6_len = sizeof(*sin6); 958 959 inp = (struct sctp_inpcb *)so->so_pcb; 960 if (inp == NULL) { 961 SCTP_FREE_SONAME(sin6); 962 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 963 return (ECONNRESET); 964 } 965 SCTP_INP_RLOCK(inp); 966 sin6->sin6_port = inp->sctp_lport; 967 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 968 /* For the bound all case you get back 0 */ 969 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 970 struct sctp_tcb *stcb; 971 struct sockaddr_in6 *sin_a6; 972 struct sctp_nets *net; 973 int fnd; 974 975 stcb = LIST_FIRST(&inp->sctp_asoc_list); 976 if (stcb == NULL) { 977 SCTP_INP_RUNLOCK(inp); 978 SCTP_FREE_SONAME(sin6); 979 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 980 return (ENOENT); 981 } 982 fnd = 0; 983 sin_a6 = NULL; 984 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 985 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 986 if (sin_a6 == NULL) 987 /* this will make coverity happy */ 988 continue; 989 990 if (sin_a6->sin6_family == AF_INET6) { 991 fnd = 1; 992 break; 993 } 994 } 995 if ((!fnd) || (sin_a6 == NULL)) { 996 /* punt */ 997 SCTP_INP_RUNLOCK(inp); 998 SCTP_FREE_SONAME(sin6); 999 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1000 return (ENOENT); 1001 } 1002 vrf_id = inp->def_vrf_id; 1003 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 1004 if (sctp_ifa) { 1005 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1006 } 1007 } else { 1008 /* For the bound all case you get back 0 */ 1009 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1010 } 1011 } else { 1012 /* Take the first IPv6 address in the list */ 1013 struct sctp_laddr *laddr; 1014 int fnd = 0; 1015 1016 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1017 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1018 struct sockaddr_in6 *sin_a; 1019 1020 sin_a = &laddr->ifa->address.sin6; 1021 sin6->sin6_addr = sin_a->sin6_addr; 1022 fnd = 1; 1023 break; 1024 } 1025 } 1026 if (!fnd) { 1027 SCTP_FREE_SONAME(sin6); 1028 SCTP_INP_RUNLOCK(inp); 1029 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1030 return (ENOENT); 1031 } 1032 } 1033 SCTP_INP_RUNLOCK(inp); 1034 /* Scoping things for v6 */ 1035 if ((error = sa6_recoverscope(sin6)) != 0) { 1036 SCTP_FREE_SONAME(sin6); 1037 return (error); 1038 } 1039 (*addr) = (struct sockaddr *)sin6; 1040 return (0); 1041} 1042 1043static int 1044sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1045{ 1046 struct sockaddr_in6 *sin6; 1047 int fnd; 1048 struct sockaddr_in6 *sin_a6; 1049 struct sctp_inpcb *inp; 1050 struct sctp_tcb *stcb; 1051 struct sctp_nets *net; 1052 int error; 1053 1054 /* Do the malloc first in case it blocks. */ 1055 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1056 if (sin6 == NULL) 1057 return (ENOMEM); 1058 sin6->sin6_family = AF_INET6; 1059 sin6->sin6_len = sizeof(*sin6); 1060 1061 inp = (struct sctp_inpcb *)so->so_pcb; 1062 if ((inp == NULL) || 1063 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1064 /* UDP type and listeners will drop out here */ 1065 SCTP_FREE_SONAME(sin6); 1066 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1067 return (ENOTCONN); 1068 } 1069 SCTP_INP_RLOCK(inp); 1070 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1071 if (stcb) { 1072 SCTP_TCB_LOCK(stcb); 1073 } 1074 SCTP_INP_RUNLOCK(inp); 1075 if (stcb == NULL) { 1076 SCTP_FREE_SONAME(sin6); 1077 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1078 return (ECONNRESET); 1079 } 1080 fnd = 0; 1081 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1082 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1083 if (sin_a6->sin6_family == AF_INET6) { 1084 fnd = 1; 1085 sin6->sin6_port = stcb->rport; 1086 sin6->sin6_addr = sin_a6->sin6_addr; 1087 break; 1088 } 1089 } 1090 SCTP_TCB_UNLOCK(stcb); 1091 if (!fnd) { 1092 /* No IPv4 address */ 1093 SCTP_FREE_SONAME(sin6); 1094 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1095 return (ENOENT); 1096 } 1097 if ((error = sa6_recoverscope(sin6)) != 0) { 1098 SCTP_FREE_SONAME(sin6); 1099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1100 return (error); 1101 } 1102 *addr = (struct sockaddr *)sin6; 1103 return (0); 1104} 1105 1106static int 1107sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1108{ 1109 struct in6pcb *inp6 = sotoin6pcb(so); 1110 int error; 1111 1112 if (inp6 == NULL) { 1113 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1114 return (EINVAL); 1115 } 1116 1117 /* allow v6 addresses precedence */ 1118 error = sctp6_getaddr(so, nam); 1119#ifdef INET 1120 if (error) { 1121 struct sockaddr_in6 *sin6; 1122 1123 /* try v4 next if v6 failed */ 1124 error = sctp_ingetaddr(so, nam); 1125 if (error) { 1126 return (error); 1127 } 1128 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1129 if (sin6 == NULL) { 1130 SCTP_FREE_SONAME(*nam); 1131 return (ENOMEM); 1132 } 1133 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1134 SCTP_FREE_SONAME(*nam); 1135 *nam = (struct sockaddr *)sin6; 1136 } 1137#endif 1138 return (error); 1139} 1140 1141 1142static int 1143sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1144{ 1145 struct in6pcb *inp6 = sotoin6pcb(so); 1146 int error; 1147 1148 if (inp6 == NULL) { 1149 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1150 return (EINVAL); 1151 } 1152 1153 /* allow v6 addresses precedence */ 1154 error = sctp6_peeraddr(so, nam); 1155#ifdef INET 1156 if (error) { 1157 struct sockaddr_in6 *sin6; 1158 1159 /* try v4 next if v6 failed */ 1160 error = sctp_peeraddr(so, nam); 1161 if (error) { 1162 return (error); 1163 } 1164 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1165 if (sin6 == NULL) { 1166 SCTP_FREE_SONAME(*nam); 1167 return (ENOMEM); 1168 } 1169 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1170 SCTP_FREE_SONAME(*nam); 1171 *nam = (struct sockaddr *)sin6; 1172 } 1173#endif 1174 return (error); 1175} 1176 1177struct pr_usrreqs sctp6_usrreqs = { 1178 .pru_abort = sctp6_abort, 1179 .pru_accept = sctp_accept, 1180 .pru_attach = sctp6_attach, 1181 .pru_bind = sctp6_bind, 1182 .pru_connect = sctp6_connect, 1183 .pru_control = in6_control, 1184 .pru_close = sctp6_close, 1185 .pru_detach = sctp6_close, 1186 .pru_sopoll = sopoll_generic, 1187 .pru_flush = sctp_flush, 1188 .pru_disconnect = sctp6_disconnect, 1189 .pru_listen = sctp_listen, 1190 .pru_peeraddr = sctp6_getpeeraddr, 1191 .pru_send = sctp6_send, 1192 .pru_shutdown = sctp_shutdown, 1193 .pru_sockaddr = sctp6_in6getaddr, 1194 .pru_sosend = sctp_sosend, 1195 .pru_soreceive = sctp_soreceive 1196}; 1197 1198#endif 1199