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("$FreeBSD$"); 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 #include <netinet/sctp_bsd_addr.h> 54 55 56 extern struct protosw inetsw[]; 57 58 59 60 61 int 62 sctp6_input(i_pak, offp, proto) 63 struct mbuf **i_pak; 64 int *offp; 65 int proto; 66 { 67 struct mbuf *m; 68 struct ip6_hdr *ip6; 69 struct sctphdr *sh; 70 struct sctp_inpcb *in6p = NULL; 71 struct sctp_nets *net; 72 int refcount_up = 0; 73 uint32_t check, calc_check; 74 uint32_t vrf_id = 0; 75 struct inpcb *in6p_ip; 76 struct sctp_chunkhdr *ch; 77 int length, mlen, offset, iphlen; 78 uint8_t ecn_bits; 79 struct sctp_tcb *stcb = NULL; 80 int pkt_len = 0; 81 int off = *offp; 82 83 /* get the VRF and table id's */ 84 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 85 SCTP_RELEASE_PKT(*i_pak); 86 return (-1); 87 } 88 m = SCTP_HEADER_TO_CHAIN(*i_pak); 89 pkt_len = SCTP_HEADER_LEN((*i_pak)); 90 91 #ifdef SCTP_PACKET_LOGGING 92 sctp_packet_log(m, pkt_len); 93 #endif 94 ip6 = mtod(m, struct ip6_hdr *); 95 /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ 96 IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, 97 (int)(sizeof(*sh) + sizeof(*ch))); 98 if (sh == NULL) { 99 SCTP_STAT_INCR(sctps_hdrops); 100 return IPPROTO_DONE; 101 } 102 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 103 iphlen = off; 104 offset = iphlen + sizeof(*sh) + sizeof(*ch); 105 106 #if defined(NFAITH) && NFAITH > 0 107 108 if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { 109 /* XXX send icmp6 host/port unreach? */ 110 goto bad; 111 } 112 #endif /* NFAITH defined and > 0 */ 113 SCTP_STAT_INCR(sctps_recvpackets); 114 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 115 SCTPDBG(SCTP_DEBUG_INPUT1, "V6 input gets a packet iphlen:%d pktlen:%d\n", 116 iphlen, pkt_len); 117 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 118 /* No multi-cast support in SCTP */ 119 goto bad; 120 } 121 /* destination port of 0 is illegal, based on RFC2960. */ 122 if (sh->dest_port == 0) 123 goto bad; 124 if ((sctp_no_csum_on_loopback == 0) || 125 (!SCTP_IS_IT_LOOPBACK(m))) { 126 /* 127 * we do NOT validate things from the loopback if the sysctl 128 * is set to 1. 129 */ 130 check = sh->checksum; /* save incoming checksum */ 131 if ((check == 0) && (sctp_no_csum_on_loopback)) { 132 /* 133 * special hook for where we got a local address 134 * somehow routed across a non IFT_LOOP type 135 * interface 136 */ 137 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst)) 138 goto sctp_skip_csum; 139 } 140 sh->checksum = 0; /* prepare for calc */ 141 calc_check = sctp_calculate_sum(m, &mlen, iphlen); 142 if (calc_check != check) { 143 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 144 calc_check, check, m, mlen, iphlen); 145 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 146 sh, ch, &in6p, &net, vrf_id); 147 /* in6p's ref-count increased && stcb locked */ 148 if ((in6p) && (stcb)) { 149 sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 150 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2); 151 } else if ((in6p != NULL) && (stcb == NULL)) { 152 refcount_up = 1; 153 } 154 SCTP_STAT_INCR(sctps_badsum); 155 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 156 goto bad; 157 } 158 sh->checksum = calc_check; 159 } 160 sctp_skip_csum: 161 net = NULL; 162 /* 163 * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 164 * IP/SCTP/first chunk header... 165 */ 166 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 167 sh, ch, &in6p, &net, vrf_id); 168 /* in6p's ref-count increased */ 169 if (in6p == NULL) { 170 struct sctp_init_chunk *init_chk, chunk_buf; 171 172 SCTP_STAT_INCR(sctps_noport); 173 if (ch->chunk_type == SCTP_INITIATION) { 174 /* 175 * we do a trick here to get the INIT tag, dig in 176 * and get the tag from the INIT and put it in the 177 * common header. 178 */ 179 init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 180 iphlen + sizeof(*sh), sizeof(*init_chk), 181 (uint8_t *) & chunk_buf); 182 if (init_chk) 183 sh->v_tag = init_chk->init.initiate_tag; 184 else 185 sh->v_tag = 0; 186 } 187 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 188 sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id); 189 goto bad; 190 } 191 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 192 goto bad; 193 } 194 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 195 sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id); 196 goto bad; 197 } else if (stcb == NULL) { 198 refcount_up = 1; 199 } 200 in6p_ip = (struct inpcb *)in6p; 201 #ifdef IPSEC 202 /* 203 * Check AH/ESP integrity. 204 */ 205 if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { 206 /* XXX */ 207 ipsec6stat.in_polvio++; 208 goto bad; 209 } 210 #endif /* IPSEC */ 211 212 /* 213 * CONTROL chunk processing 214 */ 215 offset -= sizeof(*ch); 216 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 217 218 /* Length now holds the total packet length payload + iphlen */ 219 length = ntohs(ip6->ip6_plen) + iphlen; 220 221 /* sa_ignore NO_NULL_CHK */ 222 sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 223 in6p, stcb, net, ecn_bits, vrf_id); 224 /* inp's ref-count reduced && stcb unlocked */ 225 /* XXX this stuff below gets moved to appropriate parts later... */ 226 if (m) 227 sctp_m_freem(m); 228 if ((in6p) && refcount_up) { 229 /* reduce ref-count */ 230 SCTP_INP_WLOCK(in6p); 231 SCTP_INP_DECR_REF(in6p); 232 SCTP_INP_WUNLOCK(in6p); 233 } 234 return IPPROTO_DONE; 235 236 bad: 237 if (stcb) { 238 SCTP_TCB_UNLOCK(stcb); 239 } 240 if ((in6p) && refcount_up) { 241 /* reduce ref-count */ 242 SCTP_INP_WLOCK(in6p); 243 SCTP_INP_DECR_REF(in6p); 244 SCTP_INP_WUNLOCK(in6p); 245 } 246 if (m) 247 sctp_m_freem(m); 248 return IPPROTO_DONE; 249 } 250 251 252 static void 253 sctp6_notify_mbuf(struct sctp_inpcb *inp, 254 struct icmp6_hdr *icmp6, 255 struct sctphdr *sh, 256 struct sctp_tcb *stcb, 257 struct sctp_nets *net) 258 { 259 uint32_t nxtsz; 260 261 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 262 (icmp6 == NULL) || (sh == NULL)) { 263 goto out; 264 } 265 /* First do we even look at it? */ 266 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 267 goto out; 268 269 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 270 /* not PACKET TO BIG */ 271 goto out; 272 } 273 /* 274 * ok we need to look closely. We could even get smarter and look at 275 * anyone that we sent to in case we get a different ICMP that tells 276 * us there is no way to reach a host, but for this impl, all we 277 * care about is MTU discovery. 278 */ 279 nxtsz = ntohl(icmp6->icmp6_mtu); 280 /* Stop any PMTU timer */ 281 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 282 283 /* Adjust destination size limit */ 284 if (net->mtu > nxtsz) { 285 net->mtu = nxtsz; 286 } 287 /* now what about the ep? */ 288 if (stcb->asoc.smallest_mtu > nxtsz) { 289 struct sctp_tmit_chunk *chk; 290 291 /* Adjust that too */ 292 stcb->asoc.smallest_mtu = nxtsz; 293 /* now off to subtract IP_DF flag if needed */ 294 295 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 296 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 297 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 298 } 299 } 300 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 301 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 302 /* 303 * For this guy we also mark for immediate 304 * resend since we sent to big of chunk 305 */ 306 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 307 if (chk->sent != SCTP_DATAGRAM_RESEND) 308 stcb->asoc.sent_queue_retran_cnt++; 309 chk->sent = SCTP_DATAGRAM_RESEND; 310 chk->rec.data.doing_fast_retransmit = 0; 311 312 chk->sent = SCTP_DATAGRAM_RESEND; 313 /* Clear any time so NO RTT is being done */ 314 chk->sent_rcv_time.tv_sec = 0; 315 chk->sent_rcv_time.tv_usec = 0; 316 stcb->asoc.total_flight -= chk->send_size; 317 net->flight_size -= chk->send_size; 318 } 319 } 320 } 321 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 322 out: 323 if (stcb) { 324 SCTP_TCB_UNLOCK(stcb); 325 } 326 } 327 328 329 void 330 sctp6_ctlinput(cmd, pktdst, d) 331 int cmd; 332 struct sockaddr *pktdst; 333 void *d; 334 { 335 struct sctphdr sh; 336 struct ip6ctlparam *ip6cp = NULL; 337 uint32_t vrf_id; 338 int cm; 339 340 vrf_id = SCTP_DEFAULT_VRFID; 341 342 if (pktdst->sa_family != AF_INET6 || 343 pktdst->sa_len != sizeof(struct sockaddr_in6)) 344 return; 345 346 if ((unsigned)cmd >= PRC_NCMDS) 347 return; 348 if (PRC_IS_REDIRECT(cmd)) { 349 d = NULL; 350 } else if (inet6ctlerrmap[cmd] == 0) { 351 return; 352 } 353 /* if the parameter is from icmp6, decode it. */ 354 if (d != NULL) { 355 ip6cp = (struct ip6ctlparam *)d; 356 } else { 357 ip6cp = (struct ip6ctlparam *)NULL; 358 } 359 360 if (ip6cp) { 361 /* 362 * XXX: We assume that when IPV6 is non NULL, M and OFF are 363 * valid. 364 */ 365 /* check if we can safely examine src and dst ports */ 366 struct sctp_inpcb *inp = NULL; 367 struct sctp_tcb *stcb = NULL; 368 struct sctp_nets *net = NULL; 369 struct sockaddr_in6 final; 370 371 if (ip6cp->ip6c_m == NULL) 372 return; 373 374 bzero(&sh, sizeof(sh)); 375 bzero(&final, sizeof(final)); 376 inp = NULL; 377 net = NULL; 378 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 379 (caddr_t)&sh); 380 ip6cp->ip6c_src->sin6_port = sh.src_port; 381 final.sin6_len = sizeof(final); 382 final.sin6_family = AF_INET6; 383 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 384 final.sin6_port = sh.dest_port; 385 stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 386 (struct sockaddr *)&final, 387 &inp, &net, 1, vrf_id); 388 /* inp's ref-count increased && stcb locked */ 389 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 390 if (cmd == PRC_MSGSIZE) { 391 sctp6_notify_mbuf(inp, 392 ip6cp->ip6c_icmp6, 393 &sh, 394 stcb, 395 net); 396 /* inp's ref-count reduced && stcb unlocked */ 397 } else { 398 if (cmd == PRC_HOSTDEAD) { 399 cm = EHOSTUNREACH; 400 } else { 401 cm = inet6ctlerrmap[cmd]; 402 } 403 sctp_notify(inp, cm, &sh, 404 (struct sockaddr *)&final, 405 stcb, net); 406 /* inp's ref-count reduced && stcb unlocked */ 407 } 408 } else { 409 if (PRC_IS_REDIRECT(cmd) && inp) { 410 in6_rtchange((struct in6pcb *)inp, 411 inet6ctlerrmap[cmd]); 412 } 413 if (inp) { 414 /* reduce inp's ref-count */ 415 SCTP_INP_WLOCK(inp); 416 SCTP_INP_DECR_REF(inp); 417 SCTP_INP_WUNLOCK(inp); 418 } 419 if (stcb) 420 SCTP_TCB_UNLOCK(stcb); 421 } 422 } 423 } 424 425 /* 426 * this routine can probably be collasped into the one in sctp_userreq.c 427 * since they do the same thing and now we lookup with a sockaddr 428 */ 429 static int 430 sctp6_getcred(SYSCTL_HANDLER_ARGS) 431 { 432 struct xucred xuc; 433 struct sockaddr_in6 addrs[2]; 434 struct sctp_inpcb *inp; 435 struct sctp_nets *net; 436 struct sctp_tcb *stcb; 437 int error; 438 uint32_t vrf_id; 439 440 vrf_id = SCTP_DEFAULT_VRFID; 441 442 error = priv_check(req->td, PRIV_NETINET_GETCRED); 443 if (error) 444 return (error); 445 446 if (req->newlen != sizeof(addrs)) 447 return (EINVAL); 448 if (req->oldlen != sizeof(struct ucred)) 449 return (EINVAL); 450 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 451 if (error) 452 return (error); 453 454 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 455 sin6tosa(&addrs[1]), 456 &inp, &net, 1, vrf_id); 457 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 458 if ((inp != NULL) && (stcb == NULL)) { 459 /* reduce ref-count */ 460 SCTP_INP_WLOCK(inp); 461 SCTP_INP_DECR_REF(inp); 462 goto cred_can_cont; 463 } 464 error = ENOENT; 465 goto out; 466 } 467 SCTP_TCB_UNLOCK(stcb); 468 /* 469 * We use the write lock here, only since in the error leg we need 470 * it. If we used RLOCK, then we would have to 471 * wlock/decr/unlock/rlock. Which in theory could create a hole. 472 * Better to use higher wlock. 473 */ 474 SCTP_INP_WLOCK(inp); 475 cred_can_cont: 476 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 477 if (error) { 478 SCTP_INP_WUNLOCK(inp); 479 goto out; 480 } 481 cru2x(inp->sctp_socket->so_cred, &xuc); 482 SCTP_INP_WUNLOCK(inp); 483 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 484 out: 485 return (error); 486 } 487 488 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 489 0, 0, 490 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 491 492 493 /* This is the same as the sctp_abort() could be made common */ 494 static void 495 sctp6_abort(struct socket *so) 496 { 497 struct sctp_inpcb *inp; 498 uint32_t flags; 499 500 inp = (struct sctp_inpcb *)so->so_pcb; 501 if (inp == 0) 502 return; 503 sctp_must_try_again: 504 flags = inp->sctp_flags; 505 #ifdef SCTP_LOG_CLOSING 506 sctp_log_closing(inp, NULL, 17); 507 #endif 508 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 509 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 510 #ifdef SCTP_LOG_CLOSING 511 sctp_log_closing(inp, NULL, 16); 512 #endif 513 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 514 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 515 SOCK_LOCK(so); 516 SCTP_SB_CLEAR(so->so_snd); 517 /* 518 * same for the rcv ones, they are only here for the 519 * accounting/select. 520 */ 521 SCTP_SB_CLEAR(so->so_rcv); 522 /* Now null out the reference, we are completely detached. */ 523 so->so_pcb = NULL; 524 SOCK_UNLOCK(so); 525 } else { 526 flags = inp->sctp_flags; 527 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 528 goto sctp_must_try_again; 529 } 530 } 531 return; 532 } 533 534 static int 535 sctp6_attach(struct socket *so, int proto, struct thread *p) 536 { 537 struct in6pcb *inp6; 538 int error; 539 struct sctp_inpcb *inp; 540 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 541 542 inp = (struct sctp_inpcb *)so->so_pcb; 543 if (inp != NULL) 544 return EINVAL; 545 546 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 547 error = SCTP_SORESERVE(so, sctp_sendspace, sctp_recvspace); 548 if (error) 549 return error; 550 } 551 error = sctp_inpcb_alloc(so, vrf_id); 552 if (error) 553 return error; 554 inp = (struct sctp_inpcb *)so->so_pcb; 555 SCTP_INP_WLOCK(inp); 556 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 557 inp6 = (struct in6pcb *)inp; 558 559 inp6->inp_vflag |= INP_IPV6; 560 inp6->in6p_hops = -1; /* use kernel default */ 561 inp6->in6p_cksum = -1; /* just to be sure */ 562 #ifdef INET 563 /* 564 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 565 * socket as well, because the socket may be bound to an IPv6 566 * wildcard address, which may match an IPv4-mapped IPv6 address. 567 */ 568 inp6->inp_ip_ttl = ip_defttl; 569 #endif 570 /* 571 * Hmm what about the IPSEC stuff that is missing here but in 572 * sctp_attach()? 573 */ 574 SCTP_INP_WUNLOCK(inp); 575 return 0; 576 } 577 578 static int 579 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 580 { 581 struct sctp_inpcb *inp; 582 struct in6pcb *inp6; 583 int error; 584 585 inp = (struct sctp_inpcb *)so->so_pcb; 586 if (inp == 0) 587 return EINVAL; 588 589 if (addr) { 590 if ((addr->sa_family == AF_INET6) && 591 (addr->sa_len != sizeof(struct sockaddr_in6))) { 592 return EINVAL; 593 } 594 if ((addr->sa_family == AF_INET) && 595 (addr->sa_len != sizeof(struct sockaddr_in))) { 596 return EINVAL; 597 } 598 } 599 inp6 = (struct in6pcb *)inp; 600 inp6->inp_vflag &= ~INP_IPV4; 601 inp6->inp_vflag |= INP_IPV6; 602 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 603 if (addr->sa_family == AF_INET) { 604 /* binding v4 addr to v6 socket, so reset flags */ 605 inp6->inp_vflag |= INP_IPV4; 606 inp6->inp_vflag &= ~INP_IPV6; 607 } else { 608 struct sockaddr_in6 *sin6_p; 609 610 sin6_p = (struct sockaddr_in6 *)addr; 611 612 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 613 inp6->inp_vflag |= INP_IPV4; 614 } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 615 struct sockaddr_in sin; 616 617 in6_sin6_2_sin(&sin, sin6_p); 618 inp6->inp_vflag |= INP_IPV4; 619 inp6->inp_vflag &= ~INP_IPV6; 620 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, p); 621 return error; 622 } 623 } 624 } else if (addr != NULL) { 625 /* IPV6_V6ONLY socket */ 626 if (addr->sa_family == AF_INET) { 627 /* can't bind v4 addr to v6 only socket! */ 628 return EINVAL; 629 } else { 630 struct sockaddr_in6 *sin6_p; 631 632 sin6_p = (struct sockaddr_in6 *)addr; 633 634 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) 635 /* can't bind v4-mapped addrs either! */ 636 /* NOTE: we don't support SIIT */ 637 return EINVAL; 638 } 639 } 640 error = sctp_inpcb_bind(so, addr, p); 641 return error; 642 } 643 644 645 static void 646 sctp6_close(struct socket *so) 647 { 648 struct sctp_inpcb *inp; 649 uint32_t flags; 650 651 inp = (struct sctp_inpcb *)so->so_pcb; 652 if (inp == 0) 653 return; 654 655 /* 656 * Inform all the lower layer assoc that we are done. 657 */ 658 sctp_must_try_again: 659 flags = inp->sctp_flags; 660 #ifdef SCTP_LOG_CLOSING 661 sctp_log_closing(inp, NULL, 17); 662 #endif 663 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 664 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 665 if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || 666 (so->so_rcv.sb_cc > 0)) { 667 #ifdef SCTP_LOG_CLOSING 668 sctp_log_closing(inp, NULL, 13); 669 #endif 670 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT 671 ,SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 672 } else { 673 #ifdef SCTP_LOG_CLOSING 674 sctp_log_closing(inp, NULL, 14); 675 #endif 676 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 677 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 678 } 679 /* 680 * The socket is now detached, no matter what the state of 681 * the SCTP association. 682 */ 683 SOCK_LOCK(so); 684 SCTP_SB_CLEAR(so->so_snd); 685 /* 686 * same for the rcv ones, they are only here for the 687 * accounting/select. 688 */ 689 SCTP_SB_CLEAR(so->so_rcv); 690 /* Now null out the reference, we are completely detached. */ 691 so->so_pcb = NULL; 692 SOCK_UNLOCK(so); 693 } else { 694 flags = inp->sctp_flags; 695 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 696 goto sctp_must_try_again; 697 } 698 } 699 return; 700 701 } 702 703 /* This could be made common with sctp_detach() since they are identical */ 704 705 static 706 int 707 sctp6_disconnect(struct socket *so) 708 { 709 struct sctp_inpcb *inp; 710 711 inp = (struct sctp_inpcb *)so->so_pcb; 712 if (inp == NULL) { 713 return (ENOTCONN); 714 } 715 SCTP_INP_RLOCK(inp); 716 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 717 if (SCTP_LIST_EMPTY(&inp->sctp_asoc_list)) { 718 /* No connection */ 719 SCTP_INP_RUNLOCK(inp); 720 return (ENOTCONN); 721 } else { 722 int some_on_streamwheel = 0; 723 struct sctp_association *asoc; 724 struct sctp_tcb *stcb; 725 726 stcb = LIST_FIRST(&inp->sctp_asoc_list); 727 if (stcb == NULL) { 728 SCTP_INP_RUNLOCK(inp); 729 return (EINVAL); 730 } 731 SCTP_TCB_LOCK(stcb); 732 asoc = &stcb->asoc; 733 if (((so->so_options & SO_LINGER) && 734 (so->so_linger == 0)) || 735 (so->so_rcv.sb_cc > 0)) { 736 if (SCTP_GET_STATE(asoc) != 737 SCTP_STATE_COOKIE_WAIT) { 738 /* Left with Data unread */ 739 struct mbuf *op_err; 740 741 op_err = sctp_generate_invmanparam(SCTP_CAUSE_USER_INITIATED_ABT); 742 sctp_send_abort_tcb(stcb, op_err); 743 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 744 } 745 SCTP_INP_RUNLOCK(inp); 746 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 747 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 748 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 749 } 750 sctp_free_assoc(inp, stcb, SCTP_DONOT_SETSCOPE, 751 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 752 /* No unlock tcb assoc is gone */ 753 return (0); 754 } 755 if (!TAILQ_EMPTY(&asoc->out_wheel)) { 756 /* Check to see if some data queued */ 757 struct sctp_stream_out *outs; 758 759 TAILQ_FOREACH(outs, &asoc->out_wheel, 760 next_spoke) { 761 if (!TAILQ_EMPTY(&outs->outqueue)) { 762 some_on_streamwheel = 1; 763 break; 764 } 765 } 766 } 767 if (TAILQ_EMPTY(&asoc->send_queue) && 768 TAILQ_EMPTY(&asoc->sent_queue) && 769 (some_on_streamwheel == 0)) { 770 /* nothing queued to send, so I'm done... */ 771 if ((SCTP_GET_STATE(asoc) != 772 SCTP_STATE_SHUTDOWN_SENT) && 773 (SCTP_GET_STATE(asoc) != 774 SCTP_STATE_SHUTDOWN_ACK_SENT)) { 775 /* only send SHUTDOWN the first time */ 776 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 777 sctp_chunk_output(stcb->sctp_ep, stcb, 1); 778 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 779 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 780 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 781 } 782 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 783 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 784 stcb->sctp_ep, stcb, 785 asoc->primary_destination); 786 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 787 stcb->sctp_ep, stcb, 788 asoc->primary_destination); 789 } 790 } else { 791 /* 792 * we still got (or just got) data to send, 793 * so set SHUTDOWN_PENDING 794 */ 795 /* 796 * XXX sockets draft says that MSG_EOF 797 * should be sent with no data. currently, 798 * we will allow user data to be sent first 799 * and move to SHUTDOWN-PENDING 800 */ 801 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 802 } 803 SCTP_TCB_UNLOCK(stcb); 804 SCTP_INP_RUNLOCK(inp); 805 return (0); 806 } 807 } else { 808 /* UDP model does not support this */ 809 SCTP_INP_RUNLOCK(inp); 810 return EOPNOTSUPP; 811 } 812 } 813 814 815 int 816 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 817 struct mbuf *control, struct thread *p); 818 819 820 static int 821 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 822 struct mbuf *control, struct thread *p) 823 { 824 struct sctp_inpcb *inp; 825 struct inpcb *in_inp; 826 struct in6pcb *inp6; 827 828 #ifdef INET 829 struct sockaddr_in6 *sin6; 830 831 #endif /* INET */ 832 /* No SPL needed since sctp_output does this */ 833 834 inp = (struct sctp_inpcb *)so->so_pcb; 835 if (inp == NULL) { 836 if (control) { 837 SCTP_RELEASE_PKT(control); 838 control = NULL; 839 } 840 SCTP_RELEASE_PKT(m); 841 return EINVAL; 842 } 843 in_inp = (struct inpcb *)inp; 844 inp6 = (struct in6pcb *)inp; 845 /* 846 * For the TCP model we may get a NULL addr, if we are a connected 847 * socket thats ok. 848 */ 849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 850 (addr == NULL)) { 851 goto connected_type; 852 } 853 if (addr == NULL) { 854 SCTP_RELEASE_PKT(m); 855 if (control) { 856 SCTP_RELEASE_PKT(control); 857 control = NULL; 858 } 859 return (EDESTADDRREQ); 860 } 861 #ifdef INET 862 sin6 = (struct sockaddr_in6 *)addr; 863 if (SCTP_IPV6_V6ONLY(inp6)) { 864 /* 865 * if IPV6_V6ONLY flag, we discard datagrams destined to a 866 * v4 addr or v4-mapped addr 867 */ 868 if (addr->sa_family == AF_INET) { 869 return EINVAL; 870 } 871 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 872 return EINVAL; 873 } 874 } 875 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 876 if (!ip6_v6only) { 877 struct sockaddr_in sin; 878 879 /* convert v4-mapped into v4 addr and send */ 880 in6_sin6_2_sin(&sin, sin6); 881 return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 882 control, p); 883 } else { 884 /* mapped addresses aren't enabled */ 885 return EINVAL; 886 } 887 } 888 #endif /* INET */ 889 connected_type: 890 /* now what about control */ 891 if (control) { 892 if (inp->control) { 893 SCTP_PRINTF("huh? control set?\n"); 894 SCTP_RELEASE_PKT(inp->control); 895 inp->control = NULL; 896 } 897 inp->control = control; 898 } 899 /* Place the data */ 900 if (inp->pkt) { 901 SCTP_BUF_NEXT(inp->pkt_last) = m; 902 inp->pkt_last = m; 903 } else { 904 inp->pkt_last = inp->pkt = m; 905 } 906 if ( 907 /* FreeBSD and MacOSX uses a flag passed */ 908 ((flags & PRUS_MORETOCOME) == 0) 909 ) { 910 /* 911 * note with the current version this code will only be used 912 * by OpenBSD, NetBSD and FreeBSD have methods for 913 * re-defining sosend() to use sctp_sosend(). One can 914 * optionaly switch back to this code (by changing back the 915 * defininitions but this is not advisable. 916 */ 917 int ret; 918 919 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 920 inp->pkt = NULL; 921 inp->control = NULL; 922 return (ret); 923 } else { 924 return (0); 925 } 926 } 927 928 static int 929 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 930 { 931 uint32_t vrf_id; 932 int error = 0; 933 struct sctp_inpcb *inp; 934 struct in6pcb *inp6; 935 struct sctp_tcb *stcb; 936 937 #ifdef INET 938 struct sockaddr_in6 *sin6; 939 struct sockaddr_storage ss; 940 941 #endif /* INET */ 942 943 inp6 = (struct in6pcb *)so->so_pcb; 944 inp = (struct sctp_inpcb *)so->so_pcb; 945 if (inp == 0) { 946 return (ECONNRESET); /* I made the same as TCP since we are 947 * not setup? */ 948 } 949 if (addr == NULL) { 950 return (EINVAL); 951 } 952 if ((addr->sa_family == AF_INET6) && (addr->sa_len != sizeof(struct sockaddr_in6))) { 953 return (EINVAL); 954 } 955 if ((addr->sa_family == AF_INET) && (addr->sa_len != sizeof(struct sockaddr_in))) { 956 return (EINVAL); 957 } 958 vrf_id = inp->def_vrf_id; 959 SCTP_ASOC_CREATE_LOCK(inp); 960 SCTP_INP_RLOCK(inp); 961 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 962 SCTP_PCB_FLAGS_UNBOUND) { 963 /* Bind a ephemeral port */ 964 SCTP_INP_RUNLOCK(inp); 965 error = sctp6_bind(so, NULL, p); 966 if (error) { 967 SCTP_ASOC_CREATE_UNLOCK(inp); 968 969 return (error); 970 } 971 SCTP_INP_RLOCK(inp); 972 } 973 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 974 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 975 /* We are already connected AND the TCP model */ 976 SCTP_INP_RUNLOCK(inp); 977 SCTP_ASOC_CREATE_UNLOCK(inp); 978 return (EADDRINUSE); 979 } 980 #ifdef INET 981 sin6 = (struct sockaddr_in6 *)addr; 982 if (SCTP_IPV6_V6ONLY(inp6)) { 983 /* 984 * if IPV6_V6ONLY flag, ignore connections destined to a v4 985 * addr or v4-mapped addr 986 */ 987 if (addr->sa_family == AF_INET) { 988 SCTP_INP_RUNLOCK(inp); 989 SCTP_ASOC_CREATE_UNLOCK(inp); 990 return EINVAL; 991 } 992 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 993 SCTP_INP_RUNLOCK(inp); 994 SCTP_ASOC_CREATE_UNLOCK(inp); 995 return EINVAL; 996 } 997 } 998 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 999 if (!ip6_v6only) { 1000 /* convert v4-mapped into v4 addr */ 1001 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 1002 addr = (struct sockaddr *)&ss; 1003 } else { 1004 /* mapped addresses aren't enabled */ 1005 SCTP_INP_RUNLOCK(inp); 1006 SCTP_ASOC_CREATE_UNLOCK(inp); 1007 return EINVAL; 1008 } 1009 } else 1010 #endif /* INET */ 1011 addr = addr; /* for true v6 address case */ 1012 1013 /* Now do we connect? */ 1014 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1015 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1016 if (stcb) { 1017 SCTP_TCB_UNLOCK(stcb); 1018 } 1019 SCTP_INP_RUNLOCK(inp); 1020 } else { 1021 SCTP_INP_RUNLOCK(inp); 1022 SCTP_INP_WLOCK(inp); 1023 SCTP_INP_INCR_REF(inp); 1024 SCTP_INP_WUNLOCK(inp); 1025 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 1026 if (stcb == NULL) { 1027 SCTP_INP_WLOCK(inp); 1028 SCTP_INP_DECR_REF(inp); 1029 SCTP_INP_WUNLOCK(inp); 1030 } 1031 } 1032 1033 if (stcb != NULL) { 1034 /* Already have or am bring up an association */ 1035 SCTP_ASOC_CREATE_UNLOCK(inp); 1036 SCTP_TCB_UNLOCK(stcb); 1037 return (EALREADY); 1038 } 1039 /* We are GOOD to go */ 1040 stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id); 1041 SCTP_ASOC_CREATE_UNLOCK(inp); 1042 if (stcb == NULL) { 1043 /* Gak! no memory */ 1044 return (error); 1045 } 1046 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1047 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1048 /* Set the connected flag so we can queue data */ 1049 soisconnecting(so); 1050 } 1051 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1052 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1053 1054 /* initialize authentication parameters for the assoc */ 1055 sctp_initialize_auth_params(inp, stcb); 1056 1057 sctp_send_initiate(inp, stcb); 1058 SCTP_TCB_UNLOCK(stcb); 1059 return error; 1060 } 1061 1062 static int 1063 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 1064 { 1065 struct sockaddr_in6 *sin6; 1066 struct sctp_inpcb *inp; 1067 uint32_t vrf_id; 1068 struct sctp_ifa *sctp_ifa; 1069 1070 int error; 1071 1072 /* 1073 * Do the malloc first in case it blocks. 1074 */ 1075 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1076 sin6->sin6_family = AF_INET6; 1077 sin6->sin6_len = sizeof(*sin6); 1078 1079 inp = (struct sctp_inpcb *)so->so_pcb; 1080 if (inp == NULL) { 1081 SCTP_FREE_SONAME(sin6); 1082 return ECONNRESET; 1083 } 1084 SCTP_INP_RLOCK(inp); 1085 sin6->sin6_port = inp->sctp_lport; 1086 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1087 /* For the bound all case you get back 0 */ 1088 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1089 struct sctp_tcb *stcb; 1090 struct sockaddr_in6 *sin_a6; 1091 struct sctp_nets *net; 1092 int fnd; 1093 1094 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1095 if (stcb == NULL) { 1096 goto notConn6; 1097 } 1098 fnd = 0; 1099 sin_a6 = NULL; 1100 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1101 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1102 if (sin_a6 == NULL) 1103 /* this will make coverity happy */ 1104 continue; 1105 1106 if (sin_a6->sin6_family == AF_INET6) { 1107 fnd = 1; 1108 break; 1109 } 1110 } 1111 if ((!fnd) || (sin_a6 == NULL)) { 1112 /* punt */ 1113 goto notConn6; 1114 } 1115 vrf_id = inp->def_vrf_id; 1116 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1117 if (sctp_ifa) { 1118 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1119 } 1120 } else { 1121 /* For the bound all case you get back 0 */ 1122 notConn6: 1123 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1124 } 1125 } else { 1126 /* Take the first IPv6 address in the list */ 1127 struct sctp_laddr *laddr; 1128 int fnd = 0; 1129 1130 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1131 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1132 struct sockaddr_in6 *sin_a; 1133 1134 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1135 sin6->sin6_addr = sin_a->sin6_addr; 1136 fnd = 1; 1137 break; 1138 } 1139 } 1140 if (!fnd) { 1141 SCTP_FREE_SONAME(sin6); 1142 SCTP_INP_RUNLOCK(inp); 1143 return ENOENT; 1144 } 1145 } 1146 SCTP_INP_RUNLOCK(inp); 1147 /* Scoping things for v6 */ 1148 if ((error = sa6_recoverscope(sin6)) != 0) { 1149 SCTP_FREE_SONAME(sin6); 1150 return (error); 1151 } 1152 (*addr) = (struct sockaddr *)sin6; 1153 return (0); 1154 } 1155 1156 static int 1157 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1158 { 1159 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1160 int fnd; 1161 struct sockaddr_in6 *sin_a6; 1162 struct sctp_inpcb *inp; 1163 struct sctp_tcb *stcb; 1164 struct sctp_nets *net; 1165 1166 int error; 1167 1168 /* 1169 * Do the malloc first in case it blocks. 1170 */ 1171 inp = (struct sctp_inpcb *)so->so_pcb; 1172 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1173 /* UDP type and listeners will drop out here */ 1174 return (ENOTCONN); 1175 } 1176 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1177 sin6->sin6_family = AF_INET6; 1178 sin6->sin6_len = sizeof(*sin6); 1179 1180 /* We must recapture incase we blocked */ 1181 inp = (struct sctp_inpcb *)so->so_pcb; 1182 if (inp == NULL) { 1183 SCTP_FREE_SONAME(sin6); 1184 return ECONNRESET; 1185 } 1186 SCTP_INP_RLOCK(inp); 1187 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1188 if (stcb) { 1189 SCTP_TCB_LOCK(stcb); 1190 } 1191 SCTP_INP_RUNLOCK(inp); 1192 if (stcb == NULL) { 1193 SCTP_FREE_SONAME(sin6); 1194 return ECONNRESET; 1195 } 1196 fnd = 0; 1197 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1198 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1199 if (sin_a6->sin6_family == AF_INET6) { 1200 fnd = 1; 1201 sin6->sin6_port = stcb->rport; 1202 sin6->sin6_addr = sin_a6->sin6_addr; 1203 break; 1204 } 1205 } 1206 SCTP_TCB_UNLOCK(stcb); 1207 if (!fnd) { 1208 /* No IPv4 address */ 1209 SCTP_FREE_SONAME(sin6); 1210 return ENOENT; 1211 } 1212 if ((error = sa6_recoverscope(sin6)) != 0) 1213 return (error); 1214 *addr = (struct sockaddr *)sin6; 1215 return (0); 1216 } 1217 1218 static int 1219 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1220 { 1221 struct sockaddr *addr; 1222 struct in6pcb *inp6 = sotoin6pcb(so); 1223 int error; 1224 1225 if (inp6 == NULL) 1226 return EINVAL; 1227 1228 /* allow v6 addresses precedence */ 1229 error = sctp6_getaddr(so, nam); 1230 if (error) { 1231 /* try v4 next if v6 failed */ 1232 error = sctp_ingetaddr(so, nam); 1233 if (error) { 1234 return (error); 1235 } 1236 addr = *nam; 1237 /* if I'm V6ONLY, convert it to v4-mapped */ 1238 if (SCTP_IPV6_V6ONLY(inp6)) { 1239 struct sockaddr_in6 sin6; 1240 1241 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1242 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1243 1244 } 1245 } 1246 return (error); 1247 } 1248 1249 1250 static int 1251 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1252 { 1253 struct sockaddr *addr = *nam; 1254 struct in6pcb *inp6 = sotoin6pcb(so); 1255 int error; 1256 1257 if (inp6 == NULL) 1258 return EINVAL; 1259 1260 /* allow v6 addresses precedence */ 1261 error = sctp6_peeraddr(so, nam); 1262 if (error) { 1263 /* try v4 next if v6 failed */ 1264 error = sctp_peeraddr(so, nam); 1265 if (error) { 1266 return (error); 1267 } 1268 /* if I'm V6ONLY, convert it to v4-mapped */ 1269 if (SCTP_IPV6_V6ONLY(inp6)) { 1270 struct sockaddr_in6 sin6; 1271 1272 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1273 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1274 } 1275 } 1276 return error; 1277 } 1278 1279 struct pr_usrreqs sctp6_usrreqs = { 1280 .pru_abort = sctp6_abort, 1281 .pru_accept = sctp_accept, 1282 .pru_attach = sctp6_attach, 1283 .pru_bind = sctp6_bind, 1284 .pru_connect = sctp6_connect, 1285 .pru_control = in6_control, 1286 .pru_close = sctp6_close, 1287 .pru_detach = sctp6_close, 1288 .pru_sopoll = sopoll_generic, 1289 .pru_disconnect = sctp6_disconnect, 1290 .pru_listen = sctp_listen, 1291 .pru_peeraddr = sctp6_getpeeraddr, 1292 .pru_send = sctp6_send, 1293 .pru_shutdown = sctp_shutdown, 1294 .pru_sockaddr = sctp6_in6getaddr, 1295 .pru_sosend = sctp_sosend, 1296 .pru_soreceive = sctp_soreceive 1297 }; 1298