sctp6_usrreq.c revision 169420
1/*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30/* $KAME: sctp6_usrreq.c,v 1.38 2005/08/24 08:08:56 suz Exp $ */ 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/sys/netinet6/sctp6_usrreq.c 169420 2007-05-09 13:30:06Z rrs $"); 33 34 35#include <netinet/sctp_os.h> 36#include <sys/proc.h> 37#include <netinet/sctp_pcb.h> 38#include <netinet/sctp_header.h> 39#include <netinet/sctp_var.h> 40#if defined(INET6) 41#include <netinet6/sctp6_var.h> 42#endif 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 54 55extern struct protosw inetsw[]; 56 57 58 59 60int 61sctp6_input(i_pak, offp, proto) 62 struct mbuf **i_pak; 63 int *offp; 64 int proto; 65{ 66 struct mbuf *m; 67 struct ip6_hdr *ip6; 68 struct sctphdr *sh; 69 struct sctp_inpcb *in6p = NULL; 70 struct sctp_nets *net; 71 int refcount_up = 0; 72 uint32_t check, calc_check; 73 uint32_t vrf_id = 0, table_id = 0; 74 struct inpcb *in6p_ip; 75 struct sctp_chunkhdr *ch; 76 int length, mlen, offset, iphlen; 77 uint8_t ecn_bits; 78 struct sctp_tcb *stcb = NULL; 79 int off = *offp; 80 81 /* get the VRF and table id's */ 82 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 83 SCTP_RELEASE_PKT(*i_pak); 84 return (-1); 85 } 86 if (SCTP_GET_PKT_TABLEID(*i_pak, table_id)) { 87 SCTP_RELEASE_PKT(*i_pak); 88 return (-1); 89 } 90 m = SCTP_HEADER_TO_CHAIN(*i_pak); 91 92 ip6 = mtod(m, struct ip6_hdr *); 93 /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ 94 IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, sizeof(*sh) + sizeof(*ch)); 95 if (sh == NULL) { 96 SCTP_STAT_INCR(sctps_hdrops); 97 return IPPROTO_DONE; 98 } 99 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 100 iphlen = off; 101 offset = iphlen + sizeof(*sh) + sizeof(*ch); 102 103#if defined(NFAITH) && NFAITH > 0 104 105 if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { 106 /* XXX send icmp6 host/port unreach? */ 107 goto bad; 108 } 109#endif /* NFAITH defined and > 0 */ 110 SCTP_STAT_INCR(sctps_recvpackets); 111 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 112 SCTPDBG(SCTP_DEBUG_INPUT1, "V6 input gets a packet iphlen:%d pktlen:%d\n", 113 iphlen, SCTP_HEADER_LEN((*i_pak))); 114 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 115 /* No multi-cast support in SCTP */ 116 goto bad; 117 } 118 /* destination port of 0 is illegal, based on RFC2960. */ 119 if (sh->dest_port == 0) 120 goto bad; 121 if ((sctp_no_csum_on_loopback == 0) || 122 (!SCTP_IS_IT_LOOPBACK(m))) { 123 /* 124 * we do NOT validate things from the loopback if the sysctl 125 * is set to 1. 126 */ 127 check = sh->checksum; /* save incoming checksum */ 128 if ((check == 0) && (sctp_no_csum_on_loopback)) { 129 /* 130 * special hook for where we got a local address 131 * somehow routed across a non IFT_LOOP type 132 * interface 133 */ 134 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst)) 135 goto sctp_skip_csum; 136 } 137 sh->checksum = 0; /* prepare for calc */ 138 calc_check = sctp_calculate_sum(m, &mlen, iphlen); 139 if (calc_check != check) { 140 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 141 calc_check, check, m, mlen, iphlen); 142 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 143 sh, ch, &in6p, &net, vrf_id); 144 /* in6p's ref-count increased && stcb locked */ 145 if ((in6p) && (stcb)) { 146 sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 147 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2); 148 } else if ((in6p != NULL) && (stcb == NULL)) { 149 refcount_up = 1; 150 } 151 SCTP_STAT_INCR(sctps_badsum); 152 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 153 goto bad; 154 } 155 sh->checksum = calc_check; 156 } 157sctp_skip_csum: 158 net = NULL; 159 /* 160 * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 161 * IP/SCTP/first chunk header... 162 */ 163 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 164 sh, ch, &in6p, &net, vrf_id); 165 /* in6p's ref-count increased */ 166 if (in6p == NULL) { 167 struct sctp_init_chunk *init_chk, chunk_buf; 168 169 SCTP_STAT_INCR(sctps_noport); 170 if (ch->chunk_type == SCTP_INITIATION) { 171 /* 172 * we do a trick here to get the INIT tag, dig in 173 * and get the tag from the INIT and put it in the 174 * common header. 175 */ 176 init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 177 iphlen + sizeof(*sh), sizeof(*init_chk), 178 (uint8_t *) & chunk_buf); 179 if (init_chk) 180 sh->v_tag = init_chk->init.initiate_tag; 181 else 182 sh->v_tag = 0; 183 } 184 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 185 sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id, 186 table_id); 187 goto bad; 188 } 189 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 190 goto bad; 191 } 192 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 193 sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id, 194 table_id); 195 goto bad; 196 } else if (stcb == NULL) { 197 refcount_up = 1; 198 } 199 in6p_ip = (struct inpcb *)in6p; 200#ifdef IPSEC 201 /* 202 * Check AH/ESP integrity. 203 */ 204 if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { 205/* XXX */ 206 ipsec6stat.in_polvio++; 207 goto bad; 208 } 209#endif /* IPSEC */ 210 211 /* 212 * CONTROL chunk processing 213 */ 214 offset -= sizeof(*ch); 215 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 216 217 /* Length now holds the total packet length payload + iphlen */ 218 length = ntohs(ip6->ip6_plen) + iphlen; 219 220 sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 221 in6p, stcb, net, ecn_bits, vrf_id, table_id); 222 /* inp's ref-count reduced && stcb unlocked */ 223 /* XXX this stuff below gets moved to appropriate parts later... */ 224 if (m) 225 sctp_m_freem(m); 226 if ((in6p) && refcount_up) { 227 /* reduce ref-count */ 228 SCTP_INP_WLOCK(in6p); 229 SCTP_INP_DECR_REF(in6p); 230 SCTP_INP_WUNLOCK(in6p); 231 } 232 return IPPROTO_DONE; 233 234bad: 235 if (stcb) { 236 SCTP_TCB_UNLOCK(stcb); 237 } 238 if ((in6p) && refcount_up) { 239 /* reduce ref-count */ 240 SCTP_INP_WLOCK(in6p); 241 SCTP_INP_DECR_REF(in6p); 242 SCTP_INP_WUNLOCK(in6p); 243 } 244 if (m) 245 sctp_m_freem(m); 246 return IPPROTO_DONE; 247} 248 249 250static void 251sctp6_notify_mbuf(struct sctp_inpcb *inp, 252 struct icmp6_hdr *icmp6, 253 struct sctphdr *sh, 254 struct sctp_tcb *stcb, 255 struct sctp_nets *net) 256{ 257 uint32_t nxtsz; 258 259 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 260 (icmp6 == NULL) || (sh == NULL)) { 261 goto out; 262 } 263 /* First do we even look at it? */ 264 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 265 goto out; 266 267 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 268 /* not PACKET TO BIG */ 269 goto out; 270 } 271 /* 272 * ok we need to look closely. We could even get smarter and look at 273 * anyone that we sent to in case we get a different ICMP that tells 274 * us there is no way to reach a host, but for this impl, all we 275 * care about is MTU discovery. 276 */ 277 nxtsz = ntohl(icmp6->icmp6_mtu); 278 /* Stop any PMTU timer */ 279 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 280 281 /* Adjust destination size limit */ 282 if (net->mtu > nxtsz) { 283 net->mtu = nxtsz; 284 } 285 /* now what about the ep? */ 286 if (stcb->asoc.smallest_mtu > nxtsz) { 287 struct sctp_tmit_chunk *chk; 288 289 /* Adjust that too */ 290 stcb->asoc.smallest_mtu = nxtsz; 291 /* now off to subtract IP_DF flag if needed */ 292 293 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 294 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 295 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 296 } 297 } 298 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 299 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 300 /* 301 * For this guy we also mark for immediate 302 * resend since we sent to big of chunk 303 */ 304 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 305 if (chk->sent != SCTP_DATAGRAM_RESEND) 306 stcb->asoc.sent_queue_retran_cnt++; 307 chk->sent = SCTP_DATAGRAM_RESEND; 308 chk->rec.data.doing_fast_retransmit = 0; 309 310 chk->sent = SCTP_DATAGRAM_RESEND; 311 /* Clear any time so NO RTT is being done */ 312 chk->sent_rcv_time.tv_sec = 0; 313 chk->sent_rcv_time.tv_usec = 0; 314 stcb->asoc.total_flight -= chk->send_size; 315 net->flight_size -= chk->send_size; 316 } 317 } 318 } 319 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 320out: 321 if (stcb) { 322 SCTP_TCB_UNLOCK(stcb); 323 } 324} 325 326 327void 328sctp6_ctlinput(cmd, pktdst, d) 329 int cmd; 330 struct sockaddr *pktdst; 331 void *d; 332{ 333 struct sctphdr sh; 334 struct ip6ctlparam *ip6cp = NULL; 335 uint32_t vrf_id; 336 int cm; 337 338 vrf_id = SCTP_DEFAULT_VRFID; 339 340 if (pktdst->sa_family != AF_INET6 || 341 pktdst->sa_len != sizeof(struct sockaddr_in6)) 342 return; 343 344 if ((unsigned)cmd >= PRC_NCMDS) 345 return; 346 if (PRC_IS_REDIRECT(cmd)) { 347 d = NULL; 348 } else if (inet6ctlerrmap[cmd] == 0) { 349 return; 350 } 351 /* if the parameter is from icmp6, decode it. */ 352 if (d != NULL) { 353 ip6cp = (struct ip6ctlparam *)d; 354 } else { 355 ip6cp = (struct ip6ctlparam *)NULL; 356 } 357 358 if (ip6cp) { 359 /* 360 * XXX: We assume that when IPV6 is non NULL, M and OFF are 361 * valid. 362 */ 363 /* check if we can safely examine src and dst ports */ 364 struct sctp_inpcb *inp = NULL; 365 struct sctp_tcb *stcb = NULL; 366 struct sctp_nets *net = NULL; 367 struct sockaddr_in6 final; 368 369 if (ip6cp->ip6c_m == NULL) 370 return; 371 372 bzero(&sh, sizeof(sh)); 373 bzero(&final, sizeof(final)); 374 inp = NULL; 375 net = NULL; 376 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 377 (caddr_t)&sh); 378 ip6cp->ip6c_src->sin6_port = sh.src_port; 379 final.sin6_len = sizeof(final); 380 final.sin6_family = AF_INET6; 381 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 382 final.sin6_port = sh.dest_port; 383 stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 384 (struct sockaddr *)&final, 385 &inp, &net, 1, vrf_id); 386 /* inp's ref-count increased && stcb locked */ 387 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 388 if (cmd == PRC_MSGSIZE) { 389 sctp6_notify_mbuf(inp, 390 ip6cp->ip6c_icmp6, 391 &sh, 392 stcb, 393 net); 394 /* inp's ref-count reduced && stcb unlocked */ 395 } else { 396 if (cmd == PRC_HOSTDEAD) { 397 cm = EHOSTUNREACH; 398 } else { 399 cm = inet6ctlerrmap[cmd]; 400 } 401 sctp_notify(inp, cm, &sh, 402 (struct sockaddr *)&final, 403 stcb, net); 404 /* inp's ref-count reduced && stcb unlocked */ 405 } 406 } else { 407 if (PRC_IS_REDIRECT(cmd) && inp) { 408 in6_rtchange((struct in6pcb *)inp, 409 inet6ctlerrmap[cmd]); 410 } 411 if (inp) { 412 /* reduce inp's ref-count */ 413 SCTP_INP_WLOCK(inp); 414 SCTP_INP_DECR_REF(inp); 415 SCTP_INP_WUNLOCK(inp); 416 } 417 if (stcb) 418 SCTP_TCB_UNLOCK(stcb); 419 } 420 } 421} 422 423/* 424 * this routine can probably be collasped into the one in sctp_userreq.c 425 * since they do the same thing and now we lookup with a sockaddr 426 */ 427static int 428sctp6_getcred(SYSCTL_HANDLER_ARGS) 429{ 430 struct xucred xuc; 431 struct sockaddr_in6 addrs[2]; 432 struct sctp_inpcb *inp; 433 struct sctp_nets *net; 434 struct sctp_tcb *stcb; 435 int error; 436 uint32_t vrf_id; 437 438 vrf_id = SCTP_DEFAULT_VRFID; 439 440 /* 441 * XXXRW: Other instances of getcred use SUSER_ALLOWJAIL, as socket 442 * visibility is scoped using cr_canseesocket(), which it is not 443 * here. 444 */ 445 error = priv_check_cred(req->td->td_ucred, PRIV_NETINET_RESERVEDPORT, 446 0); 447 if (error) 448 return (error); 449 450 if (req->newlen != sizeof(addrs)) 451 return (EINVAL); 452 if (req->oldlen != sizeof(struct ucred)) 453 return (EINVAL); 454 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 455 if (error) 456 return (error); 457 458 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 459 sin6tosa(&addrs[1]), 460 &inp, &net, 1, vrf_id); 461 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 462 if ((inp != NULL) && (stcb == NULL)) { 463 /* reduce ref-count */ 464 SCTP_INP_WLOCK(inp); 465 SCTP_INP_DECR_REF(inp); 466 goto cred_can_cont; 467 } 468 error = ENOENT; 469 goto out; 470 } 471 SCTP_TCB_UNLOCK(stcb); 472 /* 473 * We use the write lock here, only since in the error leg we need 474 * it. If we used RLOCK, then we would have to 475 * wlock/decr/unlock/rlock. Which in theory could create a hole. 476 * Better to use higher wlock. 477 */ 478 SCTP_INP_WLOCK(inp); 479cred_can_cont: 480 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 481 if (error) { 482 SCTP_INP_WUNLOCK(inp); 483 goto out; 484 } 485 cru2x(inp->sctp_socket->so_cred, &xuc); 486 SCTP_INP_WUNLOCK(inp); 487 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 488out: 489 return (error); 490} 491 492SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 493 0, 0, 494 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 495 496 497/* This is the same as the sctp_abort() could be made common */ 498static void 499sctp6_abort(struct socket *so) 500{ 501 struct sctp_inpcb *inp; 502 uint32_t flags; 503 504 inp = (struct sctp_inpcb *)so->so_pcb; 505 if (inp == 0) 506 return; 507sctp_must_try_again: 508 flags = inp->sctp_flags; 509#ifdef SCTP_LOG_CLOSING 510 sctp_log_closing(inp, NULL, 17); 511#endif 512 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 513 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 514#ifdef SCTP_LOG_CLOSING 515 sctp_log_closing(inp, NULL, 16); 516#endif 517 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 518 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 519 SOCK_LOCK(so); 520 SCTP_SB_CLEAR(so->so_snd); 521 /* 522 * same for the rcv ones, they are only here for the 523 * accounting/select. 524 */ 525 SCTP_SB_CLEAR(so->so_rcv); 526 /* Now null out the reference, we are completely detached. */ 527 so->so_pcb = NULL; 528 SOCK_UNLOCK(so); 529 } else { 530 flags = inp->sctp_flags; 531 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 532 goto sctp_must_try_again; 533 } 534 } 535 return; 536} 537 538static int 539sctp6_attach(struct socket *so, int proto, struct thread *p) 540{ 541 struct in6pcb *inp6; 542 int error; 543 struct sctp_inpcb *inp; 544 545 inp = (struct sctp_inpcb *)so->so_pcb; 546 if (inp != NULL) 547 return EINVAL; 548 549 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 550 error = SCTP_SORESERVE(so, sctp_sendspace, sctp_recvspace); 551 if (error) 552 return error; 553 } 554 error = sctp_inpcb_alloc(so); 555 if (error) 556 return error; 557 inp = (struct sctp_inpcb *)so->so_pcb; 558 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 559 inp6 = (struct in6pcb *)inp; 560 561 inp6->inp_vflag |= INP_IPV6; 562 inp6->in6p_hops = -1; /* use kernel default */ 563 inp6->in6p_cksum = -1; /* just to be sure */ 564#ifdef INET 565 /* 566 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 567 * socket as well, because the socket may be bound to an IPv6 568 * wildcard address, which may match an IPv4-mapped IPv6 address. 569 */ 570 inp6->inp_ip_ttl = ip_defttl; 571#endif 572 /* 573 * Hmm what about the IPSEC stuff that is missing here but in 574 * sctp_attach()? 575 */ 576 return 0; 577} 578 579static int 580sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 581{ 582 struct sctp_inpcb *inp; 583 struct in6pcb *inp6; 584 int error; 585 586 inp = (struct sctp_inpcb *)so->so_pcb; 587 if (inp == 0) 588 return EINVAL; 589 590 inp6 = (struct in6pcb *)inp; 591 inp6->inp_vflag &= ~INP_IPV4; 592 inp6->inp_vflag |= INP_IPV6; 593 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 594 if (addr->sa_family == AF_INET) { 595 /* binding v4 addr to v6 socket, so reset flags */ 596 inp6->inp_vflag |= INP_IPV4; 597 inp6->inp_vflag &= ~INP_IPV6; 598 } else { 599 struct sockaddr_in6 *sin6_p; 600 601 sin6_p = (struct sockaddr_in6 *)addr; 602 603 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 604 inp6->inp_vflag |= INP_IPV4; 605 } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 606 struct sockaddr_in sin; 607 608 in6_sin6_2_sin(&sin, sin6_p); 609 inp6->inp_vflag |= INP_IPV4; 610 inp6->inp_vflag &= ~INP_IPV6; 611 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, p); 612 return error; 613 } 614 } 615 } else if (addr != NULL) { 616 /* IPV6_V6ONLY socket */ 617 if (addr->sa_family == AF_INET) { 618 /* can't bind v4 addr to v6 only socket! */ 619 return EINVAL; 620 } else { 621 struct sockaddr_in6 *sin6_p; 622 623 sin6_p = (struct sockaddr_in6 *)addr; 624 625 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) 626 /* can't bind v4-mapped addrs either! */ 627 /* NOTE: we don't support SIIT */ 628 return EINVAL; 629 } 630 } 631 error = sctp_inpcb_bind(so, addr, p); 632 return error; 633} 634 635 636static void 637sctp6_close(struct socket *so) 638{ 639 struct sctp_inpcb *inp; 640 uint32_t flags; 641 642 inp = (struct sctp_inpcb *)so->so_pcb; 643 if (inp == 0) 644 return; 645 646 /* 647 * Inform all the lower layer assoc that we are done. 648 */ 649sctp_must_try_again: 650 flags = inp->sctp_flags; 651#ifdef SCTP_LOG_CLOSING 652 sctp_log_closing(inp, NULL, 17); 653#endif 654 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 655 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 656 if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || 657 (so->so_rcv.sb_cc > 0)) { 658#ifdef SCTP_LOG_CLOSING 659 sctp_log_closing(inp, NULL, 13); 660#endif 661 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT 662 ,SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 663 } else { 664#ifdef SCTP_LOG_CLOSING 665 sctp_log_closing(inp, NULL, 14); 666#endif 667 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 668 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 669 } 670 /* 671 * The socket is now detached, no matter what the state of 672 * the SCTP association. 673 */ 674 SOCK_LOCK(so); 675 SCTP_SB_CLEAR(so->so_snd); 676 /* 677 * same for the rcv ones, they are only here for the 678 * accounting/select. 679 */ 680 SCTP_SB_CLEAR(so->so_rcv); 681 /* Now null out the reference, we are completely detached. */ 682 so->so_pcb = NULL; 683 SOCK_UNLOCK(so); 684 } else { 685 flags = inp->sctp_flags; 686 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 687 goto sctp_must_try_again; 688 } 689 } 690 return; 691 692} 693 694/* This could be made common with sctp_detach() since they are identical */ 695 696static 697int 698sctp6_disconnect(struct socket *so) 699{ 700 struct sctp_inpcb *inp; 701 702 inp = (struct sctp_inpcb *)so->so_pcb; 703 if (inp == NULL) { 704 return (ENOTCONN); 705 } 706 SCTP_INP_RLOCK(inp); 707 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 708 if (SCTP_LIST_EMPTY(&inp->sctp_asoc_list)) { 709 /* No connection */ 710 SCTP_INP_RUNLOCK(inp); 711 return (ENOTCONN); 712 } else { 713 int some_on_streamwheel = 0; 714 struct sctp_association *asoc; 715 struct sctp_tcb *stcb; 716 717 stcb = LIST_FIRST(&inp->sctp_asoc_list); 718 if (stcb == NULL) { 719 SCTP_INP_RUNLOCK(inp); 720 return (EINVAL); 721 } 722 SCTP_TCB_LOCK(stcb); 723 asoc = &stcb->asoc; 724 if (((so->so_options & SO_LINGER) && 725 (so->so_linger == 0)) || 726 (so->so_rcv.sb_cc > 0)) { 727 if (SCTP_GET_STATE(asoc) != 728 SCTP_STATE_COOKIE_WAIT) { 729 /* Left with Data unread */ 730 struct mbuf *op_err; 731 732 op_err = sctp_generate_invmanparam(SCTP_CAUSE_USER_INITIATED_ABT); 733 sctp_send_abort_tcb(stcb, op_err); 734 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 735 } 736 SCTP_INP_RUNLOCK(inp); 737 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 738 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 739 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 740 } 741 sctp_free_assoc(inp, stcb, SCTP_DONOT_SETSCOPE, 742 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 743 /* No unlock tcb assoc is gone */ 744 return (0); 745 } 746 if (!TAILQ_EMPTY(&asoc->out_wheel)) { 747 /* Check to see if some data queued */ 748 struct sctp_stream_out *outs; 749 750 TAILQ_FOREACH(outs, &asoc->out_wheel, 751 next_spoke) { 752 if (!TAILQ_EMPTY(&outs->outqueue)) { 753 some_on_streamwheel = 1; 754 break; 755 } 756 } 757 } 758 if (TAILQ_EMPTY(&asoc->send_queue) && 759 TAILQ_EMPTY(&asoc->sent_queue) && 760 (some_on_streamwheel == 0)) { 761 /* nothing queued to send, so I'm done... */ 762 if ((SCTP_GET_STATE(asoc) != 763 SCTP_STATE_SHUTDOWN_SENT) && 764 (SCTP_GET_STATE(asoc) != 765 SCTP_STATE_SHUTDOWN_ACK_SENT)) { 766 /* only send SHUTDOWN the first time */ 767 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 768 sctp_chunk_output(stcb->sctp_ep, stcb, 1); 769 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 770 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 771 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 772 } 773 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 774 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 775 stcb->sctp_ep, stcb, 776 asoc->primary_destination); 777 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 778 stcb->sctp_ep, stcb, 779 asoc->primary_destination); 780 } 781 } else { 782 /* 783 * we still got (or just got) data to send, 784 * so set SHUTDOWN_PENDING 785 */ 786 /* 787 * XXX sockets draft says that MSG_EOF 788 * should be sent with no data. currently, 789 * we will allow user data to be sent first 790 * and move to SHUTDOWN-PENDING 791 */ 792 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 793 } 794 SCTP_TCB_UNLOCK(stcb); 795 SCTP_INP_RUNLOCK(inp); 796 return (0); 797 } 798 } else { 799 /* UDP model does not support this */ 800 SCTP_INP_RUNLOCK(inp); 801 return EOPNOTSUPP; 802 } 803} 804 805 806int 807sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 808 struct mbuf *control, struct thread *p); 809 810 811static int 812sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 813 struct mbuf *control, struct thread *p) 814{ 815 struct sctp_inpcb *inp; 816 struct inpcb *in_inp; 817 struct in6pcb *inp6; 818 819#ifdef INET 820 struct sockaddr_in6 *sin6; 821 822#endif /* INET */ 823 /* No SPL needed since sctp_output does this */ 824 825 inp = (struct sctp_inpcb *)so->so_pcb; 826 if (inp == NULL) { 827 if (control) { 828 SCTP_RELEASE_PKT(control); 829 control = NULL; 830 } 831 SCTP_RELEASE_PKT(m); 832 return EINVAL; 833 } 834 in_inp = (struct inpcb *)inp; 835 inp6 = (struct in6pcb *)inp; 836 /* 837 * For the TCP model we may get a NULL addr, if we are a connected 838 * socket thats ok. 839 */ 840 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 841 (addr == NULL)) { 842 goto connected_type; 843 } 844 if (addr == NULL) { 845 SCTP_RELEASE_PKT(m); 846 if (control) { 847 SCTP_RELEASE_PKT(control); 848 control = NULL; 849 } 850 return (EDESTADDRREQ); 851 } 852#ifdef INET 853 sin6 = (struct sockaddr_in6 *)addr; 854 if (SCTP_IPV6_V6ONLY(inp6)) { 855 /* 856 * if IPV6_V6ONLY flag, we discard datagrams destined to a 857 * v4 addr or v4-mapped addr 858 */ 859 if (addr->sa_family == AF_INET) { 860 return EINVAL; 861 } 862 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 863 return EINVAL; 864 } 865 } 866 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 867 if (!ip6_v6only) { 868 struct sockaddr_in sin; 869 870 /* convert v4-mapped into v4 addr and send */ 871 in6_sin6_2_sin(&sin, sin6); 872 return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 873 control, p); 874 } else { 875 /* mapped addresses aren't enabled */ 876 return EINVAL; 877 } 878 } 879#endif /* INET */ 880connected_type: 881 /* now what about control */ 882 if (control) { 883 if (inp->control) { 884 SCTP_PRINTF("huh? control set?\n"); 885 SCTP_RELEASE_PKT(inp->control); 886 inp->control = NULL; 887 } 888 inp->control = control; 889 } 890 /* Place the data */ 891 if (inp->pkt) { 892 SCTP_BUF_NEXT(inp->pkt_last) = m; 893 inp->pkt_last = m; 894 } else { 895 inp->pkt_last = inp->pkt = m; 896 } 897 if ( 898 /* FreeBSD and MacOSX uses a flag passed */ 899 ((flags & PRUS_MORETOCOME) == 0) 900 ) { 901 /* 902 * note with the current version this code will only be used 903 * by OpenBSD, NetBSD and FreeBSD have methods for 904 * re-defining sosend() to use sctp_sosend(). One can 905 * optionaly switch back to this code (by changing back the 906 * defininitions but this is not advisable. 907 */ 908 int ret; 909 910 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 911 inp->pkt = NULL; 912 inp->control = NULL; 913 return (ret); 914 } else { 915 return (0); 916 } 917} 918 919static int 920sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 921{ 922 uint32_t vrf_id; 923 int error = 0; 924 struct sctp_inpcb *inp; 925 struct in6pcb *inp6; 926 struct sctp_tcb *stcb; 927 928#ifdef INET 929 struct sockaddr_in6 *sin6; 930 struct sockaddr_storage ss; 931 932#endif /* INET */ 933 934 inp6 = (struct in6pcb *)so->so_pcb; 935 inp = (struct sctp_inpcb *)so->so_pcb; 936 if (inp == 0) { 937 return (ECONNRESET); /* I made the same as TCP since we are 938 * not setup? */ 939 } 940 vrf_id = inp->def_vrf_id; 941 SCTP_ASOC_CREATE_LOCK(inp); 942 SCTP_INP_RLOCK(inp); 943 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 944 SCTP_PCB_FLAGS_UNBOUND) { 945 /* Bind a ephemeral port */ 946 SCTP_INP_RUNLOCK(inp); 947 error = sctp6_bind(so, NULL, p); 948 if (error) { 949 SCTP_ASOC_CREATE_UNLOCK(inp); 950 951 return (error); 952 } 953 SCTP_INP_RLOCK(inp); 954 } 955 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 956 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 957 /* We are already connected AND the TCP model */ 958 SCTP_INP_RUNLOCK(inp); 959 SCTP_ASOC_CREATE_UNLOCK(inp); 960 return (EADDRINUSE); 961 } 962#ifdef INET 963 sin6 = (struct sockaddr_in6 *)addr; 964 if (SCTP_IPV6_V6ONLY(inp6)) { 965 /* 966 * if IPV6_V6ONLY flag, ignore connections destined to a v4 967 * addr or v4-mapped addr 968 */ 969 if (addr->sa_family == AF_INET) { 970 SCTP_INP_RUNLOCK(inp); 971 SCTP_ASOC_CREATE_UNLOCK(inp); 972 return EINVAL; 973 } 974 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 975 SCTP_INP_RUNLOCK(inp); 976 SCTP_ASOC_CREATE_UNLOCK(inp); 977 return EINVAL; 978 } 979 } 980 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 981 if (!ip6_v6only) { 982 /* convert v4-mapped into v4 addr */ 983 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 984 addr = (struct sockaddr *)&ss; 985 } else { 986 /* mapped addresses aren't enabled */ 987 SCTP_INP_RUNLOCK(inp); 988 SCTP_ASOC_CREATE_UNLOCK(inp); 989 return EINVAL; 990 } 991 } else 992#endif /* INET */ 993 addr = addr; /* for true v6 address case */ 994 995 /* Now do we connect? */ 996 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 997 stcb = LIST_FIRST(&inp->sctp_asoc_list); 998 if (stcb) { 999 SCTP_TCB_UNLOCK(stcb); 1000 } 1001 SCTP_INP_RUNLOCK(inp); 1002 } else { 1003 SCTP_INP_RUNLOCK(inp); 1004 SCTP_INP_WLOCK(inp); 1005 SCTP_INP_INCR_REF(inp); 1006 SCTP_INP_WUNLOCK(inp); 1007 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 1008 if (stcb == NULL) { 1009 SCTP_INP_WLOCK(inp); 1010 SCTP_INP_DECR_REF(inp); 1011 SCTP_INP_WUNLOCK(inp); 1012 } 1013 } 1014 1015 if (stcb != NULL) { 1016 /* Already have or am bring up an association */ 1017 SCTP_ASOC_CREATE_UNLOCK(inp); 1018 SCTP_TCB_UNLOCK(stcb); 1019 return (EALREADY); 1020 } 1021 /* We are GOOD to go */ 1022 stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id); 1023 SCTP_ASOC_CREATE_UNLOCK(inp); 1024 if (stcb == NULL) { 1025 /* Gak! no memory */ 1026 return (error); 1027 } 1028 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1029 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1030 /* Set the connected flag so we can queue data */ 1031 soisconnecting(so); 1032 } 1033 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1034 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1035 1036 /* initialize authentication parameters for the assoc */ 1037 sctp_initialize_auth_params(inp, stcb); 1038 1039 sctp_send_initiate(inp, stcb); 1040 SCTP_TCB_UNLOCK(stcb); 1041 return error; 1042} 1043 1044static int 1045sctp6_getaddr(struct socket *so, struct sockaddr **addr) 1046{ 1047 struct sockaddr_in6 *sin6; 1048 struct sctp_inpcb *inp; 1049 uint32_t vrf_id; 1050 struct sctp_ifa *sctp_ifa; 1051 1052 int error; 1053 1054 /* 1055 * Do the malloc first in case it blocks. 1056 */ 1057 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 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 SCTP_FREE_SONAME(sin6); 1064 return ECONNRESET; 1065 } 1066 SCTP_INP_RLOCK(inp); 1067 sin6->sin6_port = inp->sctp_lport; 1068 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1069 /* For the bound all case you get back 0 */ 1070 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1071 struct sctp_tcb *stcb; 1072 struct sockaddr_in6 *sin_a6; 1073 struct sctp_nets *net; 1074 int fnd; 1075 1076 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1077 if (stcb == NULL) { 1078 goto notConn6; 1079 } 1080 fnd = 0; 1081 sin_a6 = NULL; 1082 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1083 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1084 if (sin_a6 == NULL) 1085 /* this will make coverity happy */ 1086 continue; 1087 1088 if (sin_a6->sin6_family == AF_INET6) { 1089 fnd = 1; 1090 break; 1091 } 1092 } 1093 if ((!fnd) || (sin_a6 == NULL)) { 1094 /* punt */ 1095 goto notConn6; 1096 } 1097 vrf_id = inp->def_vrf_id; 1098 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1099 if (sctp_ifa) { 1100 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1101 } 1102 } else { 1103 /* For the bound all case you get back 0 */ 1104 notConn6: 1105 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1106 } 1107 } else { 1108 /* Take the first IPv6 address in the list */ 1109 struct sctp_laddr *laddr; 1110 int fnd = 0; 1111 1112 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1113 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1114 struct sockaddr_in6 *sin_a; 1115 1116 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1117 sin6->sin6_addr = sin_a->sin6_addr; 1118 fnd = 1; 1119 break; 1120 } 1121 } 1122 if (!fnd) { 1123 SCTP_FREE_SONAME(sin6); 1124 SCTP_INP_RUNLOCK(inp); 1125 return ENOENT; 1126 } 1127 } 1128 SCTP_INP_RUNLOCK(inp); 1129 /* Scoping things for v6 */ 1130 if ((error = sa6_recoverscope(sin6)) != 0) { 1131 SCTP_FREE_SONAME(sin6); 1132 return (error); 1133 } 1134 (*addr) = (struct sockaddr *)sin6; 1135 return (0); 1136} 1137 1138static int 1139sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1140{ 1141 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1142 int fnd; 1143 struct sockaddr_in6 *sin_a6; 1144 struct sctp_inpcb *inp; 1145 struct sctp_tcb *stcb; 1146 struct sctp_nets *net; 1147 1148 int error; 1149 1150 /* 1151 * Do the malloc first in case it blocks. 1152 */ 1153 inp = (struct sctp_inpcb *)so->so_pcb; 1154 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1155 /* UDP type and listeners will drop out here */ 1156 return (ENOTCONN); 1157 } 1158 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1159 sin6->sin6_family = AF_INET6; 1160 sin6->sin6_len = sizeof(*sin6); 1161 1162 /* We must recapture incase we blocked */ 1163 inp = (struct sctp_inpcb *)so->so_pcb; 1164 if (inp == NULL) { 1165 SCTP_FREE_SONAME(sin6); 1166 return ECONNRESET; 1167 } 1168 SCTP_INP_RLOCK(inp); 1169 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1170 if (stcb) { 1171 SCTP_TCB_LOCK(stcb); 1172 } 1173 SCTP_INP_RUNLOCK(inp); 1174 if (stcb == NULL) { 1175 SCTP_FREE_SONAME(sin6); 1176 return ECONNRESET; 1177 } 1178 fnd = 0; 1179 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1180 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1181 if (sin_a6->sin6_family == AF_INET6) { 1182 fnd = 1; 1183 sin6->sin6_port = stcb->rport; 1184 sin6->sin6_addr = sin_a6->sin6_addr; 1185 break; 1186 } 1187 } 1188 SCTP_TCB_UNLOCK(stcb); 1189 if (!fnd) { 1190 /* No IPv4 address */ 1191 SCTP_FREE_SONAME(sin6); 1192 return ENOENT; 1193 } 1194 if ((error = sa6_recoverscope(sin6)) != 0) 1195 return (error); 1196 *addr = (struct sockaddr *)sin6; 1197 return (0); 1198} 1199 1200static int 1201sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1202{ 1203 struct sockaddr *addr; 1204 struct in6pcb *inp6 = sotoin6pcb(so); 1205 int error; 1206 1207 if (inp6 == NULL) 1208 return EINVAL; 1209 1210 /* allow v6 addresses precedence */ 1211 error = sctp6_getaddr(so, nam); 1212 if (error) { 1213 /* try v4 next if v6 failed */ 1214 error = sctp_ingetaddr(so, nam); 1215 if (error) { 1216 return (error); 1217 } 1218 addr = *nam; 1219 /* if I'm V6ONLY, convert it to v4-mapped */ 1220 if (SCTP_IPV6_V6ONLY(inp6)) { 1221 struct sockaddr_in6 sin6; 1222 1223 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1224 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1225 1226 } 1227 } 1228 return (error); 1229} 1230 1231 1232static int 1233sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1234{ 1235 struct sockaddr *addr = *nam; 1236 struct in6pcb *inp6 = sotoin6pcb(so); 1237 int error; 1238 1239 if (inp6 == NULL) 1240 return EINVAL; 1241 1242 /* allow v6 addresses precedence */ 1243 error = sctp6_peeraddr(so, nam); 1244 if (error) { 1245 /* try v4 next if v6 failed */ 1246 error = sctp_peeraddr(so, nam); 1247 if (error) { 1248 return (error); 1249 } 1250 /* if I'm V6ONLY, convert it to v4-mapped */ 1251 if (SCTP_IPV6_V6ONLY(inp6)) { 1252 struct sockaddr_in6 sin6; 1253 1254 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1255 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1256 } 1257 } 1258 return error; 1259} 1260 1261struct pr_usrreqs sctp6_usrreqs = { 1262 .pru_abort = sctp6_abort, 1263 .pru_accept = sctp_accept, 1264 .pru_attach = sctp6_attach, 1265 .pru_bind = sctp6_bind, 1266 .pru_connect = sctp6_connect, 1267 .pru_control = in6_control, 1268 .pru_close = sctp6_close, 1269 .pru_detach = sctp6_close, 1270 .pru_sopoll = sopoll_generic, 1271 .pru_disconnect = sctp6_disconnect, 1272 .pru_listen = sctp_listen, 1273 .pru_peeraddr = sctp6_getpeeraddr, 1274 .pru_send = sctp6_send, 1275 .pru_shutdown = sctp_shutdown, 1276 .pru_sockaddr = sctp6_in6getaddr, 1277 .pru_sosend = sctp_sosend, 1278 .pru_soreceive = sctp_soreceive 1279}; 1280