sctp6_usrreq.c revision 169380
1/*- 2 * Copyright (c) 2001-2007, 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 169380 2007-05-08 15:53:03Z 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#ifdef SCTP_DEBUG 113 if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 114 printf("V6 input gets a packet iphlen:%d pktlen:%d\n", iphlen, 115 SCTP_HEADER_LEN((*i_pak))); 116 } 117#endif 118 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 119 /* No multi-cast support in SCTP */ 120 goto bad; 121 } 122 /* destination port of 0 is illegal, based on RFC2960. */ 123 if (sh->dest_port == 0) 124 goto bad; 125 if ((sctp_no_csum_on_loopback == 0) || 126 (!SCTP_IS_IT_LOOPBACK(m))) { 127 /* 128 * we do NOT validate things from the loopback if the sysctl 129 * is set to 1. 130 */ 131 check = sh->checksum; /* save incoming checksum */ 132 if ((check == 0) && (sctp_no_csum_on_loopback)) { 133 /* 134 * special hook for where we got a local address 135 * somehow routed across a non IFT_LOOP type 136 * interface 137 */ 138 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst)) 139 goto sctp_skip_csum; 140 } 141 sh->checksum = 0; /* prepare for calc */ 142 calc_check = sctp_calculate_sum(m, &mlen, iphlen); 143 if (calc_check != check) { 144#ifdef SCTP_DEBUG 145 if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 146 printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 147 calc_check, check, m, 148 mlen, iphlen); 149 } 150#endif 151 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 152 sh, ch, &in6p, &net, vrf_id); 153 /* in6p's ref-count increased && stcb locked */ 154 if ((in6p) && (stcb)) { 155 sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 156 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2); 157 } else if ((in6p != NULL) && (stcb == NULL)) { 158 refcount_up = 1; 159 } 160 SCTP_STAT_INCR(sctps_badsum); 161 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 162 goto bad; 163 } 164 sh->checksum = calc_check; 165 } 166sctp_skip_csum: 167 net = NULL; 168 /* 169 * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 170 * IP/SCTP/first chunk header... 171 */ 172 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 173 sh, ch, &in6p, &net, vrf_id); 174 /* in6p's ref-count increased */ 175 if (in6p == NULL) { 176 struct sctp_init_chunk *init_chk, chunk_buf; 177 178 SCTP_STAT_INCR(sctps_noport); 179 if (ch->chunk_type == SCTP_INITIATION) { 180 /* 181 * we do a trick here to get the INIT tag, dig in 182 * and get the tag from the INIT and put it in the 183 * common header. 184 */ 185 init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 186 iphlen + sizeof(*sh), sizeof(*init_chk), 187 (uint8_t *) & chunk_buf); 188 sh->v_tag = init_chk->init.initiate_tag; 189 } 190 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 191 sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id, 192 table_id); 193 goto bad; 194 } 195 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 196 goto bad; 197 } 198 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 199 sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id, 200 table_id); 201 goto bad; 202 } else if (stcb == NULL) { 203 refcount_up = 1; 204 } 205 in6p_ip = (struct inpcb *)in6p; 206#ifdef IPSEC 207 /* 208 * Check AH/ESP integrity. 209 */ 210 if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { 211/* XXX */ 212 ipsec6stat.in_polvio++; 213 goto bad; 214 } 215#endif /* IPSEC */ 216 217 /* 218 * CONTROL chunk processing 219 */ 220 offset -= sizeof(*ch); 221 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 222 223 /* Length now holds the total packet length payload + iphlen */ 224 length = ntohs(ip6->ip6_plen) + iphlen; 225 226 sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 227 in6p, stcb, net, ecn_bits, vrf_id, table_id); 228 /* inp's ref-count reduced && stcb unlocked */ 229 /* XXX this stuff below gets moved to appropriate parts later... */ 230 if (m) 231 sctp_m_freem(m); 232 if ((in6p) && refcount_up) { 233 /* reduce ref-count */ 234 SCTP_INP_WLOCK(in6p); 235 SCTP_INP_DECR_REF(in6p); 236 SCTP_INP_WUNLOCK(in6p); 237 } 238 return IPPROTO_DONE; 239 240bad: 241 if (stcb) 242 SCTP_TCB_UNLOCK(stcb); 243 244 if ((in6p) && refcount_up) { 245 /* reduce ref-count */ 246 SCTP_INP_WLOCK(in6p); 247 SCTP_INP_DECR_REF(in6p); 248 SCTP_INP_WUNLOCK(in6p); 249 } 250 if (m) 251 sctp_m_freem(m); 252 /* For BSD/MAC this does nothing */ 253 SCTP_DETACH_HEADER_FROM_CHAIN(*i_pak); 254 SCTP_RELEASE_HEADER(*i_pak); 255 return IPPROTO_DONE; 256} 257 258 259static void 260sctp6_notify_mbuf(struct sctp_inpcb *inp, 261 struct icmp6_hdr *icmp6, 262 struct sctphdr *sh, 263 struct sctp_tcb *stcb, 264 struct sctp_nets *net) 265{ 266 uint32_t nxtsz; 267 268 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 269 (icmp6 == NULL) || (sh == NULL)) { 270 goto out; 271 } 272 /* First do we even look at it? */ 273 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 274 goto out; 275 276 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 277 /* not PACKET TO BIG */ 278 goto out; 279 } 280 /* 281 * ok we need to look closely. We could even get smarter and look at 282 * anyone that we sent to in case we get a different ICMP that tells 283 * us there is no way to reach a host, but for this impl, all we 284 * care about is MTU discovery. 285 */ 286 nxtsz = ntohl(icmp6->icmp6_mtu); 287 /* Stop any PMTU timer */ 288 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 289 290 /* Adjust destination size limit */ 291 if (net->mtu > nxtsz) { 292 net->mtu = nxtsz; 293 } 294 /* now what about the ep? */ 295 if (stcb->asoc.smallest_mtu > nxtsz) { 296 struct sctp_tmit_chunk *chk; 297 298 /* Adjust that too */ 299 stcb->asoc.smallest_mtu = nxtsz; 300 /* now off to subtract IP_DF flag if needed */ 301 302 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 303 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 304 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 305 } 306 } 307 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 308 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 309 /* 310 * For this guy we also mark for immediate 311 * resend since we sent to big of chunk 312 */ 313 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 314 if (chk->sent != SCTP_DATAGRAM_RESEND) 315 stcb->asoc.sent_queue_retran_cnt++; 316 chk->sent = SCTP_DATAGRAM_RESEND; 317 chk->rec.data.doing_fast_retransmit = 0; 318 319 chk->sent = SCTP_DATAGRAM_RESEND; 320 /* Clear any time so NO RTT is being done */ 321 chk->sent_rcv_time.tv_sec = 0; 322 chk->sent_rcv_time.tv_usec = 0; 323 stcb->asoc.total_flight -= chk->send_size; 324 net->flight_size -= chk->send_size; 325 } 326 } 327 } 328 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 329out: 330 if (stcb) 331 SCTP_TCB_UNLOCK(stcb); 332} 333 334 335void 336sctp6_ctlinput(cmd, pktdst, d) 337 int cmd; 338 struct sockaddr *pktdst; 339 void *d; 340{ 341 struct sctphdr sh; 342 struct ip6ctlparam *ip6cp = NULL; 343 uint32_t vrf_id; 344 int cm; 345 346 vrf_id = SCTP_DEFAULT_VRFID; 347 348 if (pktdst->sa_family != AF_INET6 || 349 pktdst->sa_len != sizeof(struct sockaddr_in6)) 350 return; 351 352 if ((unsigned)cmd >= PRC_NCMDS) 353 return; 354 if (PRC_IS_REDIRECT(cmd)) { 355 d = NULL; 356 } else if (inet6ctlerrmap[cmd] == 0) { 357 return; 358 } 359 /* if the parameter is from icmp6, decode it. */ 360 if (d != NULL) { 361 ip6cp = (struct ip6ctlparam *)d; 362 } else { 363 ip6cp = (struct ip6ctlparam *)NULL; 364 } 365 366 if (ip6cp) { 367 /* 368 * XXX: We assume that when IPV6 is non NULL, M and OFF are 369 * valid. 370 */ 371 /* check if we can safely examine src and dst ports */ 372 struct sctp_inpcb *inp = NULL; 373 struct sctp_tcb *stcb = NULL; 374 struct sctp_nets *net = NULL; 375 struct sockaddr_in6 final; 376 377 if (ip6cp->ip6c_m == NULL) 378 return; 379 380 bzero(&sh, sizeof(sh)); 381 bzero(&final, sizeof(final)); 382 inp = NULL; 383 net = NULL; 384 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 385 (caddr_t)&sh); 386 ip6cp->ip6c_src->sin6_port = sh.src_port; 387 final.sin6_len = sizeof(final); 388 final.sin6_family = AF_INET6; 389 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 390 final.sin6_port = sh.dest_port; 391 stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 392 (struct sockaddr *)&final, 393 &inp, &net, 1, vrf_id); 394 /* inp's ref-count increased && stcb locked */ 395 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 396 if (cmd == PRC_MSGSIZE) { 397 sctp6_notify_mbuf(inp, 398 ip6cp->ip6c_icmp6, 399 &sh, 400 stcb, 401 net); 402 /* inp's ref-count reduced && stcb unlocked */ 403 } else { 404 if (cmd == PRC_HOSTDEAD) { 405 cm = EHOSTUNREACH; 406 } else { 407 cm = inet6ctlerrmap[cmd]; 408 } 409 sctp_notify(inp, cm, &sh, 410 (struct sockaddr *)&final, 411 stcb, net); 412 /* inp's ref-count reduced && stcb unlocked */ 413 } 414 } else { 415 if (PRC_IS_REDIRECT(cmd) && inp) { 416 in6_rtchange((struct in6pcb *)inp, 417 inet6ctlerrmap[cmd]); 418 } 419 if (inp) { 420 /* reduce inp's ref-count */ 421 SCTP_INP_WLOCK(inp); 422 SCTP_INP_DECR_REF(inp); 423 SCTP_INP_WUNLOCK(inp); 424 } 425 if (stcb) 426 SCTP_TCB_UNLOCK(stcb); 427 } 428 } 429} 430 431/* 432 * this routine can probably be collasped into the one in sctp_userreq.c 433 * since they do the same thing and now we lookup with a sockaddr 434 */ 435static int 436sctp6_getcred(SYSCTL_HANDLER_ARGS) 437{ 438 struct xucred xuc; 439 struct sockaddr_in6 addrs[2]; 440 struct sctp_inpcb *inp; 441 struct sctp_nets *net; 442 struct sctp_tcb *stcb; 443 int error; 444 uint32_t vrf_id; 445 446 vrf_id = SCTP_DEFAULT_VRFID; 447 448 /* 449 * XXXRW: Other instances of getcred use SUSER_ALLOWJAIL, as socket 450 * visibility is scoped using cr_canseesocket(), which it is not 451 * here. 452 */ 453 error = priv_check_cred(req->td->td_ucred, PRIV_NETINET_RESERVEDPORT, 454 0); 455 if (error) 456 return (error); 457 458 if (req->newlen != sizeof(addrs)) 459 return (EINVAL); 460 if (req->oldlen != sizeof(struct ucred)) 461 return (EINVAL); 462 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 463 if (error) 464 return (error); 465 466 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 467 sin6tosa(&addrs[1]), 468 &inp, &net, 1, vrf_id); 469 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 470 if ((inp != NULL) && (stcb == NULL)) { 471 /* reduce ref-count */ 472 SCTP_INP_WLOCK(inp); 473 SCTP_INP_DECR_REF(inp); 474 goto cred_can_cont; 475 } 476 error = ENOENT; 477 goto out; 478 } 479 SCTP_TCB_UNLOCK(stcb); 480 /* 481 * We use the write lock here, only since in the error leg we need 482 * it. If we used RLOCK, then we would have to 483 * wlock/decr/unlock/rlock. Which in theory could create a hole. 484 * Better to use higher wlock. 485 */ 486 SCTP_INP_WLOCK(inp); 487cred_can_cont: 488 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 489 if (error) { 490 SCTP_INP_WUNLOCK(inp); 491 goto out; 492 } 493 cru2x(inp->sctp_socket->so_cred, &xuc); 494 SCTP_INP_WUNLOCK(inp); 495 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 496out: 497 return (error); 498} 499 500SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 501 0, 0, 502 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 503 504 505/* This is the same as the sctp_abort() could be made common */ 506static void 507sctp6_abort(struct socket *so) 508{ 509 struct sctp_inpcb *inp; 510 uint32_t flags; 511 512 inp = (struct sctp_inpcb *)so->so_pcb; 513 if (inp == 0) 514 return; 515sctp_must_try_again: 516 flags = inp->sctp_flags; 517#ifdef SCTP_LOG_CLOSING 518 sctp_log_closing(inp, NULL, 17); 519#endif 520 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 521 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 522#ifdef SCTP_LOG_CLOSING 523 sctp_log_closing(inp, NULL, 16); 524#endif 525 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 526 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 527 SOCK_LOCK(so); 528 SCTP_SB_CLEAR(so->so_snd); 529 /* 530 * same for the rcv ones, they are only here for the 531 * accounting/select. 532 */ 533 SCTP_SB_CLEAR(so->so_rcv); 534 /* Now null out the reference, we are completely detached. */ 535 so->so_pcb = NULL; 536 SOCK_UNLOCK(so); 537 } else { 538 flags = inp->sctp_flags; 539 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 540 goto sctp_must_try_again; 541 } 542 } 543 return; 544} 545 546static int 547sctp6_attach(struct socket *so, int proto, struct thread *p) 548{ 549 struct in6pcb *inp6; 550 int error; 551 struct sctp_inpcb *inp; 552 553 inp = (struct sctp_inpcb *)so->so_pcb; 554 if (inp != NULL) 555 return EINVAL; 556 557 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 558 error = SCTP_SORESERVE(so, sctp_sendspace, sctp_recvspace); 559 if (error) 560 return error; 561 } 562 error = sctp_inpcb_alloc(so); 563 if (error) 564 return error; 565 inp = (struct sctp_inpcb *)so->so_pcb; 566 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 567 inp6 = (struct in6pcb *)inp; 568 569 inp6->inp_vflag |= INP_IPV6; 570 inp6->in6p_hops = -1; /* use kernel default */ 571 inp6->in6p_cksum = -1; /* just to be sure */ 572#ifdef INET 573 /* 574 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 575 * socket as well, because the socket may be bound to an IPv6 576 * wildcard address, which may match an IPv4-mapped IPv6 address. 577 */ 578 inp6->inp_ip_ttl = ip_defttl; 579#endif 580 /* 581 * Hmm what about the IPSEC stuff that is missing here but in 582 * sctp_attach()? 583 */ 584 return 0; 585} 586 587static int 588sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 589{ 590 struct sctp_inpcb *inp; 591 struct in6pcb *inp6; 592 int error; 593 594 inp = (struct sctp_inpcb *)so->so_pcb; 595 if (inp == 0) 596 return EINVAL; 597 598 inp6 = (struct in6pcb *)inp; 599 inp6->inp_vflag &= ~INP_IPV4; 600 inp6->inp_vflag |= INP_IPV6; 601 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 602 if (addr->sa_family == 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 } else { 607 struct sockaddr_in6 *sin6_p; 608 609 sin6_p = (struct sockaddr_in6 *)addr; 610 611 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 612 inp6->inp_vflag |= INP_IPV4; 613 } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 614 struct sockaddr_in sin; 615 616 in6_sin6_2_sin(&sin, sin6_p); 617 inp6->inp_vflag |= INP_IPV4; 618 inp6->inp_vflag &= ~INP_IPV6; 619 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, p); 620 return error; 621 } 622 } 623 } else if (addr != NULL) { 624 /* IPV6_V6ONLY socket */ 625 if (addr->sa_family == AF_INET) { 626 /* can't bind v4 addr to v6 only socket! */ 627 return EINVAL; 628 } else { 629 struct sockaddr_in6 *sin6_p; 630 631 sin6_p = (struct sockaddr_in6 *)addr; 632 633 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) 634 /* can't bind v4-mapped addrs either! */ 635 /* NOTE: we don't support SIIT */ 636 return EINVAL; 637 } 638 } 639 error = sctp_inpcb_bind(so, addr, p); 640 return error; 641} 642 643 644static void 645sctp6_close(struct socket *so) 646{ 647 struct sctp_inpcb *inp; 648 uint32_t flags; 649 650 inp = (struct sctp_inpcb *)so->so_pcb; 651 if (inp == 0) 652 return; 653 654 /* 655 * Inform all the lower layer assoc that we are done. 656 */ 657sctp_must_try_again: 658 flags = inp->sctp_flags; 659#ifdef SCTP_LOG_CLOSING 660 sctp_log_closing(inp, NULL, 17); 661#endif 662 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 663 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 664 if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || 665 (so->so_rcv.sb_cc > 0)) { 666#ifdef SCTP_LOG_CLOSING 667 sctp_log_closing(inp, NULL, 13); 668#endif 669 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT 670 ,SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 671 } else { 672#ifdef SCTP_LOG_CLOSING 673 sctp_log_closing(inp, NULL, 14); 674#endif 675 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 676 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 677 } 678 /* 679 * The socket is now detached, no matter what the state of 680 * the SCTP association. 681 */ 682 SOCK_LOCK(so); 683 SCTP_SB_CLEAR(so->so_snd); 684 /* 685 * same for the rcv ones, they are only here for the 686 * accounting/select. 687 */ 688 SCTP_SB_CLEAR(so->so_rcv); 689 /* Now null out the reference, we are completely detached. */ 690 so->so_pcb = NULL; 691 SOCK_UNLOCK(so); 692 } else { 693 flags = inp->sctp_flags; 694 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 695 goto sctp_must_try_again; 696 } 697 } 698 return; 699 700} 701 702/* This could be made common with sctp_detach() since they are identical */ 703 704static 705int 706sctp6_disconnect(struct socket *so) 707{ 708 struct sctp_inpcb *inp; 709 710 inp = (struct sctp_inpcb *)so->so_pcb; 711 if (inp == NULL) { 712 return (ENOTCONN); 713 } 714 SCTP_INP_RLOCK(inp); 715 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 716 if (SCTP_LIST_EMPTY(&inp->sctp_asoc_list)) { 717 /* No connection */ 718 SCTP_INP_RUNLOCK(inp); 719 return (ENOTCONN); 720 } else { 721 int some_on_streamwheel = 0; 722 struct sctp_association *asoc; 723 struct sctp_tcb *stcb; 724 725 stcb = LIST_FIRST(&inp->sctp_asoc_list); 726 if (stcb == NULL) { 727 SCTP_INP_RUNLOCK(inp); 728 return (EINVAL); 729 } 730 SCTP_TCB_LOCK(stcb); 731 asoc = &stcb->asoc; 732 if (((so->so_options & SO_LINGER) && 733 (so->so_linger == 0)) || 734 (so->so_rcv.sb_cc > 0)) { 735 if (SCTP_GET_STATE(asoc) != 736 SCTP_STATE_COOKIE_WAIT) { 737 /* Left with Data unread */ 738 struct mbuf *op_err; 739 740 op_err = sctp_generate_invmanparam(SCTP_CAUSE_USER_INITIATED_ABT); 741 sctp_send_abort_tcb(stcb, op_err); 742 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 743 } 744 SCTP_INP_RUNLOCK(inp); 745 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 746 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 747 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 748 } 749 sctp_free_assoc(inp, stcb, SCTP_DONOT_SETSCOPE, 750 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 751 /* No unlock tcb assoc is gone */ 752 return (0); 753 } 754 if (!TAILQ_EMPTY(&asoc->out_wheel)) { 755 /* Check to see if some data queued */ 756 struct sctp_stream_out *outs; 757 758 TAILQ_FOREACH(outs, &asoc->out_wheel, 759 next_spoke) { 760 if (!TAILQ_EMPTY(&outs->outqueue)) { 761 some_on_streamwheel = 1; 762 break; 763 } 764 } 765 } 766 if (TAILQ_EMPTY(&asoc->send_queue) && 767 TAILQ_EMPTY(&asoc->sent_queue) && 768 (some_on_streamwheel == 0)) { 769 /* nothing queued to send, so I'm done... */ 770 if ((SCTP_GET_STATE(asoc) != 771 SCTP_STATE_SHUTDOWN_SENT) && 772 (SCTP_GET_STATE(asoc) != 773 SCTP_STATE_SHUTDOWN_ACK_SENT)) { 774 /* only send SHUTDOWN the first time */ 775 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 776 sctp_chunk_output(stcb->sctp_ep, stcb, 1); 777 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 778 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 779 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 780 } 781 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 782 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 783 stcb->sctp_ep, stcb, 784 asoc->primary_destination); 785 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 786 stcb->sctp_ep, stcb, 787 asoc->primary_destination); 788 } 789 } else { 790 /* 791 * we still got (or just got) data to send, 792 * so set SHUTDOWN_PENDING 793 */ 794 /* 795 * XXX sockets draft says that MSG_EOF 796 * should be sent with no data. currently, 797 * we will allow user data to be sent first 798 * and move to SHUTDOWN-PENDING 799 */ 800 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 801 } 802 SCTP_TCB_UNLOCK(stcb); 803 SCTP_INP_RUNLOCK(inp); 804 return (0); 805 } 806 } else { 807 /* UDP model does not support this */ 808 SCTP_INP_RUNLOCK(inp); 809 return EOPNOTSUPP; 810 } 811} 812 813 814int 815sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 816 struct mbuf *control, struct thread *p); 817 818 819static int 820sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 821 struct mbuf *control, struct thread *p) 822{ 823 struct sctp_inpcb *inp; 824 struct inpcb *in_inp; 825 struct in6pcb *inp6; 826 827#ifdef INET 828 struct sockaddr_in6 *sin6; 829 830#endif /* INET */ 831 /* No SPL needed since sctp_output does this */ 832 833 inp = (struct sctp_inpcb *)so->so_pcb; 834 if (inp == NULL) { 835 if (control) { 836 SCTP_RELEASE_PKT(control); 837 control = NULL; 838 } 839 SCTP_RELEASE_PKT(m); 840 return EINVAL; 841 } 842 in_inp = (struct inpcb *)inp; 843 inp6 = (struct in6pcb *)inp; 844 /* 845 * For the TCP model we may get a NULL addr, if we are a connected 846 * socket thats ok. 847 */ 848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 849 (addr == NULL)) { 850 goto connected_type; 851 } 852 if (addr == NULL) { 853 SCTP_RELEASE_PKT(m); 854 if (control) { 855 SCTP_RELEASE_PKT(control); 856 control = NULL; 857 } 858 return (EDESTADDRREQ); 859 } 860#ifdef INET 861 sin6 = (struct sockaddr_in6 *)addr; 862 if (SCTP_IPV6_V6ONLY(inp6)) { 863 /* 864 * if IPV6_V6ONLY flag, we discard datagrams destined to a 865 * v4 addr or v4-mapped addr 866 */ 867 if (addr->sa_family == AF_INET) { 868 return EINVAL; 869 } 870 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 871 return EINVAL; 872 } 873 } 874 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 875 if (!ip6_v6only) { 876 struct sockaddr_in sin; 877 878 /* convert v4-mapped into v4 addr and send */ 879 in6_sin6_2_sin(&sin, sin6); 880 return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 881 control, p); 882 } else { 883 /* mapped addresses aren't enabled */ 884 return EINVAL; 885 } 886 } 887#endif /* INET */ 888connected_type: 889 /* now what about control */ 890 if (control) { 891 if (inp->control) { 892 printf("huh? control set?\n"); 893 SCTP_RELEASE_PKT(inp->control); 894 inp->control = NULL; 895 } 896 inp->control = control; 897 } 898 /* Place the data */ 899 if (inp->pkt) { 900 SCTP_BUF_NEXT(inp->pkt_last) = m; 901 inp->pkt_last = m; 902 } else { 903 inp->pkt_last = inp->pkt = m; 904 } 905 if ( 906 /* FreeBSD and MacOSX uses a flag passed */ 907 ((flags & PRUS_MORETOCOME) == 0) 908 ) { 909 /* 910 * note with the current version this code will only be used 911 * by OpenBSD, NetBSD and FreeBSD have methods for 912 * re-defining sosend() to use sctp_sosend(). One can 913 * optionaly switch back to this code (by changing back the 914 * defininitions but this is not advisable. 915 */ 916 int ret; 917 918 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 919 inp->pkt = NULL; 920 inp->control = NULL; 921 return (ret); 922 } else { 923 return (0); 924 } 925} 926 927static int 928sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 929{ 930 uint32_t vrf_id; 931 int error = 0; 932 struct sctp_inpcb *inp; 933 struct in6pcb *inp6; 934 struct sctp_tcb *stcb; 935 936#ifdef INET 937 struct sockaddr_in6 *sin6; 938 struct sockaddr_storage ss; 939 940#endif /* INET */ 941 942 inp6 = (struct in6pcb *)so->so_pcb; 943 inp = (struct sctp_inpcb *)so->so_pcb; 944 if (inp == 0) { 945 return (ECONNRESET); /* I made the same as TCP since we are 946 * not setup? */ 947 } 948 vrf_id = inp->def_vrf_id; 949 SCTP_ASOC_CREATE_LOCK(inp); 950 SCTP_INP_RLOCK(inp); 951 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 952 SCTP_PCB_FLAGS_UNBOUND) { 953 /* Bind a ephemeral port */ 954 SCTP_INP_RUNLOCK(inp); 955 error = sctp6_bind(so, NULL, p); 956 if (error) { 957 SCTP_ASOC_CREATE_UNLOCK(inp); 958 959 return (error); 960 } 961 SCTP_INP_RLOCK(inp); 962 } 963 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 964 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 965 /* We are already connected AND the TCP model */ 966 SCTP_INP_RUNLOCK(inp); 967 SCTP_ASOC_CREATE_UNLOCK(inp); 968 return (EADDRINUSE); 969 } 970#ifdef INET 971 sin6 = (struct sockaddr_in6 *)addr; 972 if (SCTP_IPV6_V6ONLY(inp6)) { 973 /* 974 * if IPV6_V6ONLY flag, ignore connections destined to a v4 975 * addr or v4-mapped addr 976 */ 977 if (addr->sa_family == AF_INET) { 978 SCTP_INP_RUNLOCK(inp); 979 SCTP_ASOC_CREATE_UNLOCK(inp); 980 return EINVAL; 981 } 982 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 983 SCTP_INP_RUNLOCK(inp); 984 SCTP_ASOC_CREATE_UNLOCK(inp); 985 return EINVAL; 986 } 987 } 988 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 989 if (!ip6_v6only) { 990 /* convert v4-mapped into v4 addr */ 991 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 992 addr = (struct sockaddr *)&ss; 993 } else { 994 /* mapped addresses aren't enabled */ 995 SCTP_INP_RUNLOCK(inp); 996 SCTP_ASOC_CREATE_UNLOCK(inp); 997 return EINVAL; 998 } 999 } else 1000#endif /* INET */ 1001 addr = addr; /* for true v6 address case */ 1002 1003 /* Now do we connect? */ 1004 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1005 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1006 if (stcb) 1007 SCTP_TCB_UNLOCK(stcb); 1008 SCTP_INP_RUNLOCK(inp); 1009 } else { 1010 SCTP_INP_RUNLOCK(inp); 1011 SCTP_INP_WLOCK(inp); 1012 SCTP_INP_INCR_REF(inp); 1013 SCTP_INP_WUNLOCK(inp); 1014 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 1015 if (stcb == NULL) { 1016 SCTP_INP_WLOCK(inp); 1017 SCTP_INP_DECR_REF(inp); 1018 SCTP_INP_WUNLOCK(inp); 1019 } 1020 } 1021 1022 if (stcb != NULL) { 1023 /* Already have or am bring up an association */ 1024 SCTP_ASOC_CREATE_UNLOCK(inp); 1025 SCTP_TCB_UNLOCK(stcb); 1026 return (EALREADY); 1027 } 1028 /* We are GOOD to go */ 1029 stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id); 1030 SCTP_ASOC_CREATE_UNLOCK(inp); 1031 if (stcb == NULL) { 1032 /* Gak! no memory */ 1033 return (error); 1034 } 1035 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1036 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1037 /* Set the connected flag so we can queue data */ 1038 soisconnecting(so); 1039 } 1040 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1041 SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1042 1043 /* initialize authentication parameters for the assoc */ 1044 sctp_initialize_auth_params(inp, stcb); 1045 1046 sctp_send_initiate(inp, stcb); 1047 SCTP_TCB_UNLOCK(stcb); 1048 return error; 1049} 1050 1051static int 1052sctp6_getaddr(struct socket *so, struct sockaddr **addr) 1053{ 1054 struct sockaddr_in6 *sin6; 1055 struct sctp_inpcb *inp; 1056 uint32_t vrf_id; 1057 struct sctp_ifa *sctp_ifa; 1058 1059 int error; 1060 1061 /* 1062 * Do the malloc first in case it blocks. 1063 */ 1064 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1065 sin6->sin6_family = AF_INET6; 1066 sin6->sin6_len = sizeof(*sin6); 1067 1068 inp = (struct sctp_inpcb *)so->so_pcb; 1069 if (inp == NULL) { 1070 SCTP_FREE_SONAME(sin6); 1071 return ECONNRESET; 1072 } 1073 SCTP_INP_RLOCK(inp); 1074 sin6->sin6_port = inp->sctp_lport; 1075 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1076 /* For the bound all case you get back 0 */ 1077 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1078 struct sctp_tcb *stcb; 1079 struct sockaddr_in6 *sin_a6; 1080 struct sctp_nets *net; 1081 int fnd; 1082 1083 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1084 if (stcb == NULL) { 1085 goto notConn6; 1086 } 1087 fnd = 0; 1088 sin_a6 = NULL; 1089 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1090 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1091 if (sin_a6 == NULL) 1092 /* this will make coverity happy */ 1093 continue; 1094 1095 if (sin_a6->sin6_family == AF_INET6) { 1096 fnd = 1; 1097 break; 1098 } 1099 } 1100 if ((!fnd) || (sin_a6 == NULL)) { 1101 /* punt */ 1102 goto notConn6; 1103 } 1104 vrf_id = inp->def_vrf_id; 1105 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1106 if (sctp_ifa) { 1107 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1108 } 1109 } else { 1110 /* For the bound all case you get back 0 */ 1111 notConn6: 1112 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1113 } 1114 } else { 1115 /* Take the first IPv6 address in the list */ 1116 struct sctp_laddr *laddr; 1117 int fnd = 0; 1118 1119 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1120 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1121 struct sockaddr_in6 *sin_a; 1122 1123 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1124 sin6->sin6_addr = sin_a->sin6_addr; 1125 fnd = 1; 1126 break; 1127 } 1128 } 1129 if (!fnd) { 1130 SCTP_FREE_SONAME(sin6); 1131 SCTP_INP_RUNLOCK(inp); 1132 return ENOENT; 1133 } 1134 } 1135 SCTP_INP_RUNLOCK(inp); 1136 /* Scoping things for v6 */ 1137 if ((error = sa6_recoverscope(sin6)) != 0) { 1138 SCTP_FREE_SONAME(sin6); 1139 return (error); 1140 } 1141 (*addr) = (struct sockaddr *)sin6; 1142 return (0); 1143} 1144 1145static int 1146sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1147{ 1148 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1149 int fnd; 1150 struct sockaddr_in6 *sin_a6; 1151 struct sctp_inpcb *inp; 1152 struct sctp_tcb *stcb; 1153 struct sctp_nets *net; 1154 1155 int error; 1156 1157 /* 1158 * Do the malloc first in case it blocks. 1159 */ 1160 inp = (struct sctp_inpcb *)so->so_pcb; 1161 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1162 /* UDP type and listeners will drop out here */ 1163 return (ENOTCONN); 1164 } 1165 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1166 sin6->sin6_family = AF_INET6; 1167 sin6->sin6_len = sizeof(*sin6); 1168 1169 /* We must recapture incase we blocked */ 1170 inp = (struct sctp_inpcb *)so->so_pcb; 1171 if (inp == NULL) { 1172 SCTP_FREE_SONAME(sin6); 1173 return ECONNRESET; 1174 } 1175 SCTP_INP_RLOCK(inp); 1176 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1177 if (stcb) 1178 SCTP_TCB_LOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 if (stcb == NULL) { 1181 SCTP_FREE_SONAME(sin6); 1182 return ECONNRESET; 1183 } 1184 fnd = 0; 1185 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1186 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1187 if (sin_a6->sin6_family == AF_INET6) { 1188 fnd = 1; 1189 sin6->sin6_port = stcb->rport; 1190 sin6->sin6_addr = sin_a6->sin6_addr; 1191 break; 1192 } 1193 } 1194 SCTP_TCB_UNLOCK(stcb); 1195 if (!fnd) { 1196 /* No IPv4 address */ 1197 SCTP_FREE_SONAME(sin6); 1198 return ENOENT; 1199 } 1200 if ((error = sa6_recoverscope(sin6)) != 0) 1201 return (error); 1202 *addr = (struct sockaddr *)sin6; 1203 return (0); 1204} 1205 1206static int 1207sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1208{ 1209 struct sockaddr *addr; 1210 struct in6pcb *inp6 = sotoin6pcb(so); 1211 int error; 1212 1213 if (inp6 == NULL) 1214 return EINVAL; 1215 1216 /* allow v6 addresses precedence */ 1217 error = sctp6_getaddr(so, nam); 1218 if (error) { 1219 /* try v4 next if v6 failed */ 1220 error = sctp_ingetaddr(so, nam); 1221 if (error) { 1222 return (error); 1223 } 1224 addr = *nam; 1225 /* if I'm V6ONLY, convert it to v4-mapped */ 1226 if (SCTP_IPV6_V6ONLY(inp6)) { 1227 struct sockaddr_in6 sin6; 1228 1229 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1230 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1231 1232 } 1233 } 1234 return (error); 1235} 1236 1237 1238static int 1239sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1240{ 1241 struct sockaddr *addr = *nam; 1242 struct in6pcb *inp6 = sotoin6pcb(so); 1243 int error; 1244 1245 if (inp6 == NULL) 1246 return EINVAL; 1247 1248 /* allow v6 addresses precedence */ 1249 error = sctp6_peeraddr(so, nam); 1250 if (error) { 1251 /* try v4 next if v6 failed */ 1252 error = sctp_peeraddr(so, nam); 1253 if (error) { 1254 return (error); 1255 } 1256 /* if I'm V6ONLY, convert it to v4-mapped */ 1257 if (SCTP_IPV6_V6ONLY(inp6)) { 1258 struct sockaddr_in6 sin6; 1259 1260 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1261 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1262 } 1263 } 1264 return error; 1265} 1266 1267struct pr_usrreqs sctp6_usrreqs = { 1268 .pru_abort = sctp6_abort, 1269 .pru_accept = sctp_accept, 1270 .pru_attach = sctp6_attach, 1271 .pru_bind = sctp6_bind, 1272 .pru_connect = sctp6_connect, 1273 .pru_control = in6_control, 1274 .pru_close = sctp6_close, 1275 .pru_detach = sctp6_close, 1276 .pru_sopoll = sopoll_generic, 1277 .pru_disconnect = sctp6_disconnect, 1278 .pru_listen = sctp_listen, 1279 .pru_peeraddr = sctp6_getpeeraddr, 1280 .pru_send = sctp6_send, 1281 .pru_shutdown = sctp_shutdown, 1282 .pru_sockaddr = sctp6_in6getaddr, 1283 .pru_sosend = sctp_sosend, 1284 .pru_soreceive = sctp_soreceive 1285}; 1286