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 #ifdef IPSEC 56 #include <netipsec/ipsec.h> 57 #if defined(INET6) 58 #include <netipsec/ipsec6.h> 59 #endif /* INET6 */ 60 #endif /* IPSEC */ 61 62 extern struct protosw inetsw[]; 63 64 65 66 67 int 68 sctp6_input(i_pak, offp, proto) 69 struct mbuf **i_pak; 70 int *offp; 71 int proto; 72 { 73 struct mbuf *m; 74 struct ip6_hdr *ip6; 75 struct sctphdr *sh; 76 struct sctp_inpcb *in6p = NULL; 77 struct sctp_nets *net; 78 int refcount_up = 0; 79 uint32_t check, calc_check; 80 uint32_t vrf_id = 0; 81 struct inpcb *in6p_ip; 82 struct sctp_chunkhdr *ch; 83 int length, mlen, offset, iphlen; 84 uint8_t ecn_bits; 85 struct sctp_tcb *stcb = NULL; 86 int pkt_len = 0; 87 int off = *offp; 88 89 /* get the VRF and table id's */ 90 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 91 SCTP_RELEASE_PKT(*i_pak); 92 return (-1); 93 } 94 m = SCTP_HEADER_TO_CHAIN(*i_pak); 95 pkt_len = SCTP_HEADER_LEN((*i_pak)); 96 97 #ifdef SCTP_PACKET_LOGGING 98 sctp_packet_log(m, pkt_len); 99 #endif 100 ip6 = mtod(m, struct ip6_hdr *); 101 /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ 102 IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, 103 (int)(sizeof(*sh) + sizeof(*ch))); 104 if (sh == NULL) { 105 SCTP_STAT_INCR(sctps_hdrops); 106 return IPPROTO_DONE; 107 } 108 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 109 iphlen = off; 110 offset = iphlen + sizeof(*sh) + sizeof(*ch); 111 SCTPDBG(SCTP_DEBUG_INPUT1, 112 "sctp6_input() length:%d iphlen:%d\n", pkt_len, iphlen); 113 114 115 #if defined(NFAITH) && NFAITH > 0 116 117 if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { 118 /* XXX send icmp6 host/port unreach? */ 119 goto bad; 120 } 121 #endif /* NFAITH defined and > 0 */ 122 SCTP_STAT_INCR(sctps_recvpackets); 123 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 124 SCTPDBG(SCTP_DEBUG_INPUT1, "V6 input gets a packet iphlen:%d pktlen:%d\n", 125 iphlen, pkt_len); 126 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 127 /* No multi-cast support in SCTP */ 128 goto bad; 129 } 130 /* destination port of 0 is illegal, based on RFC2960. */ 131 if (sh->dest_port == 0) 132 goto bad; 133 if ((sctp_no_csum_on_loopback == 0) || 134 (!SCTP_IS_IT_LOOPBACK(m))) { 135 /* 136 * we do NOT validate things from the loopback if the sysctl 137 * is set to 1. 138 */ 139 check = sh->checksum; /* save incoming checksum */ 140 if ((check == 0) && (sctp_no_csum_on_loopback)) { 141 /* 142 * special hook for where we got a local address 143 * somehow routed across a non IFT_LOOP type 144 * interface 145 */ 146 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst)) 147 goto sctp_skip_csum; 148 } 149 sh->checksum = 0; /* prepare for calc */ 150 calc_check = sctp_calculate_sum(m, &mlen, iphlen); 151 if (calc_check != check) { 152 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 153 calc_check, check, m, mlen, iphlen); 154 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 155 sh, ch, &in6p, &net, vrf_id); 156 /* in6p's ref-count increased && stcb locked */ 157 if ((in6p) && (stcb)) { 158 sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 159 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2); 160 } else if ((in6p != NULL) && (stcb == NULL)) { 161 refcount_up = 1; 162 } 163 SCTP_STAT_INCR(sctps_badsum); 164 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 165 goto bad; 166 } 167 sh->checksum = calc_check; 168 } 169 sctp_skip_csum: 170 net = NULL; 171 /* 172 * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 173 * IP/SCTP/first chunk header... 174 */ 175 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 176 sh, ch, &in6p, &net, vrf_id); 177 /* in6p's ref-count increased */ 178 if (in6p == NULL) { 179 struct sctp_init_chunk *init_chk, chunk_buf; 180 181 SCTP_STAT_INCR(sctps_noport); 182 if (ch->chunk_type == SCTP_INITIATION) { 183 /* 184 * we do a trick here to get the INIT tag, dig in 185 * and get the tag from the INIT and put it in the 186 * common header. 187 */ 188 init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 189 iphlen + sizeof(*sh), sizeof(*init_chk), 190 (uint8_t *) & chunk_buf); 191 if (init_chk) 192 sh->v_tag = init_chk->init.initiate_tag; 193 else 194 sh->v_tag = 0; 195 } 196 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 197 sctp_send_shutdown_complete2(m, iphlen, sh, vrf_id); 198 goto bad; 199 } 200 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 201 goto bad; 202 } 203 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 204 sctp_send_abort(m, iphlen, sh, 0, NULL, vrf_id); 205 goto bad; 206 } else if (stcb == NULL) { 207 refcount_up = 1; 208 } 209 in6p_ip = (struct inpcb *)in6p; 210 #ifdef IPSEC 211 /* 212 * Check AH/ESP integrity. 213 */ 214 if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { 215 /* XXX */ 216 ipsec6stat.in_polvio++; 217 goto bad; 218 } 219 #endif /* IPSEC */ 220 221 /* 222 * CONTROL chunk processing 223 */ 224 offset -= sizeof(*ch); 225 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 226 227 /* Length now holds the total packet length payload + iphlen */ 228 length = ntohs(ip6->ip6_plen) + iphlen; 229 230 /* sa_ignore NO_NULL_CHK */ 231 sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 232 in6p, stcb, net, ecn_bits, vrf_id); 233 /* inp's ref-count reduced && stcb unlocked */ 234 /* XXX this stuff below gets moved to appropriate parts later... */ 235 if (m) 236 sctp_m_freem(m); 237 if ((in6p) && refcount_up) { 238 /* reduce ref-count */ 239 SCTP_INP_WLOCK(in6p); 240 SCTP_INP_DECR_REF(in6p); 241 SCTP_INP_WUNLOCK(in6p); 242 } 243 return IPPROTO_DONE; 244 245 bad: 246 if (stcb) { 247 SCTP_TCB_UNLOCK(stcb); 248 } 249 if ((in6p) && refcount_up) { 250 /* reduce ref-count */ 251 SCTP_INP_WLOCK(in6p); 252 SCTP_INP_DECR_REF(in6p); 253 SCTP_INP_WUNLOCK(in6p); 254 } 255 if (m) 256 sctp_m_freem(m); 257 return IPPROTO_DONE; 258 } 259 260 261 static void 262 sctp6_notify_mbuf(struct sctp_inpcb *inp, 263 struct icmp6_hdr *icmp6, 264 struct sctphdr *sh, 265 struct sctp_tcb *stcb, 266 struct sctp_nets *net) 267 { 268 uint32_t nxtsz; 269 270 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 271 (icmp6 == NULL) || (sh == NULL)) { 272 goto out; 273 } 274 /* First do we even look at it? */ 275 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 276 goto out; 277 278 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 279 /* not PACKET TO BIG */ 280 goto out; 281 } 282 /* 283 * ok we need to look closely. We could even get smarter and look at 284 * anyone that we sent to in case we get a different ICMP that tells 285 * us there is no way to reach a host, but for this impl, all we 286 * care about is MTU discovery. 287 */ 288 nxtsz = ntohl(icmp6->icmp6_mtu); 289 /* Stop any PMTU timer */ 290 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 291 292 /* Adjust destination size limit */ 293 if (net->mtu > nxtsz) { 294 net->mtu = nxtsz; 295 } 296 /* now what about the ep? */ 297 if (stcb->asoc.smallest_mtu > nxtsz) { 298 struct sctp_tmit_chunk *chk; 299 300 /* Adjust that too */ 301 stcb->asoc.smallest_mtu = nxtsz; 302 /* now off to subtract IP_DF flag if needed */ 303 304 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 305 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 306 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 307 } 308 } 309 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 310 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 311 /* 312 * For this guy we also mark for immediate 313 * resend since we sent to big of chunk 314 */ 315 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 316 if (chk->sent != SCTP_DATAGRAM_RESEND) 317 stcb->asoc.sent_queue_retran_cnt++; 318 chk->sent = SCTP_DATAGRAM_RESEND; 319 chk->rec.data.doing_fast_retransmit = 0; 320 321 chk->sent = SCTP_DATAGRAM_RESEND; 322 /* Clear any time so NO RTT is being done */ 323 chk->sent_rcv_time.tv_sec = 0; 324 chk->sent_rcv_time.tv_usec = 0; 325 stcb->asoc.total_flight -= chk->send_size; 326 net->flight_size -= chk->send_size; 327 } 328 } 329 } 330 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 331 out: 332 if (stcb) { 333 SCTP_TCB_UNLOCK(stcb); 334 } 335 } 336 337 338 void 339 sctp6_ctlinput(cmd, pktdst, d) 340 int cmd; 341 struct sockaddr *pktdst; 342 void *d; 343 { 344 struct sctphdr sh; 345 struct ip6ctlparam *ip6cp = NULL; 346 uint32_t vrf_id; 347 int cm; 348 349 vrf_id = SCTP_DEFAULT_VRFID; 350 351 if (pktdst->sa_family != AF_INET6 || 352 pktdst->sa_len != sizeof(struct sockaddr_in6)) 353 return; 354 355 if ((unsigned)cmd >= PRC_NCMDS) 356 return; 357 if (PRC_IS_REDIRECT(cmd)) { 358 d = NULL; 359 } else if (inet6ctlerrmap[cmd] == 0) { 360 return; 361 } 362 /* if the parameter is from icmp6, decode it. */ 363 if (d != NULL) { 364 ip6cp = (struct ip6ctlparam *)d; 365 } else { 366 ip6cp = (struct ip6ctlparam *)NULL; 367 } 368 369 if (ip6cp) { 370 /* 371 * XXX: We assume that when IPV6 is non NULL, M and OFF are 372 * valid. 373 */ 374 /* check if we can safely examine src and dst ports */ 375 struct sctp_inpcb *inp = NULL; 376 struct sctp_tcb *stcb = NULL; 377 struct sctp_nets *net = NULL; 378 struct sockaddr_in6 final; 379 380 if (ip6cp->ip6c_m == NULL) 381 return; 382 383 bzero(&sh, sizeof(sh)); 384 bzero(&final, sizeof(final)); 385 inp = NULL; 386 net = NULL; 387 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 388 (caddr_t)&sh); 389 ip6cp->ip6c_src->sin6_port = sh.src_port; 390 final.sin6_len = sizeof(final); 391 final.sin6_family = AF_INET6; 392 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 393 final.sin6_port = sh.dest_port; 394 stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 395 (struct sockaddr *)&final, 396 &inp, &net, 1, vrf_id); 397 /* inp's ref-count increased && stcb locked */ 398 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 399 if (cmd == PRC_MSGSIZE) { 400 sctp6_notify_mbuf(inp, 401 ip6cp->ip6c_icmp6, 402 &sh, 403 stcb, 404 net); 405 /* inp's ref-count reduced && stcb unlocked */ 406 } else { 407 if (cmd == PRC_HOSTDEAD) { 408 cm = EHOSTUNREACH; 409 } else { 410 cm = inet6ctlerrmap[cmd]; 411 } 412 sctp_notify(inp, cm, &sh, 413 (struct sockaddr *)&final, 414 stcb, net); 415 /* inp's ref-count reduced && stcb unlocked */ 416 } 417 } else { 418 if (PRC_IS_REDIRECT(cmd) && inp) { 419 in6_rtchange((struct in6pcb *)inp, 420 inet6ctlerrmap[cmd]); 421 } 422 if (inp) { 423 /* reduce inp's ref-count */ 424 SCTP_INP_WLOCK(inp); 425 SCTP_INP_DECR_REF(inp); 426 SCTP_INP_WUNLOCK(inp); 427 } 428 if (stcb) 429 SCTP_TCB_UNLOCK(stcb); 430 } 431 } 432 } 433 434 /* 435 * this routine can probably be collasped into the one in sctp_userreq.c 436 * since they do the same thing and now we lookup with a sockaddr 437 */ 438 static int 439 sctp6_getcred(SYSCTL_HANDLER_ARGS) 440 { 441 struct xucred xuc; 442 struct sockaddr_in6 addrs[2]; 443 struct sctp_inpcb *inp; 444 struct sctp_nets *net; 445 struct sctp_tcb *stcb; 446 int error; 447 uint32_t vrf_id; 448 449 vrf_id = SCTP_DEFAULT_VRFID; 450 451 error = priv_check(req->td, PRIV_NETINET_GETCRED); 452 if (error) 453 return (error); 454 455 if (req->newlen != sizeof(addrs)) 456 return (EINVAL); 457 if (req->oldlen != sizeof(struct ucred)) 458 return (EINVAL); 459 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 460 if (error) 461 return (error); 462 463 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 464 sin6tosa(&addrs[1]), 465 &inp, &net, 1, vrf_id); 466 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 467 if ((inp != NULL) && (stcb == NULL)) { 468 /* reduce ref-count */ 469 SCTP_INP_WLOCK(inp); 470 SCTP_INP_DECR_REF(inp); 471 goto cred_can_cont; 472 } 473 error = ENOENT; 474 goto out; 475 } 476 SCTP_TCB_UNLOCK(stcb); 477 /* 478 * We use the write lock here, only since in the error leg we need 479 * it. If we used RLOCK, then we would have to 480 * wlock/decr/unlock/rlock. Which in theory could create a hole. 481 * Better to use higher wlock. 482 */ 483 SCTP_INP_WLOCK(inp); 484 cred_can_cont: 485 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 486 if (error) { 487 SCTP_INP_WUNLOCK(inp); 488 goto out; 489 } 490 cru2x(inp->sctp_socket->so_cred, &xuc); 491 SCTP_INP_WUNLOCK(inp); 492 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 493 out: 494 return (error); 495 } 496 497 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 498 0, 0, 499 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 500 501 502 /* This is the same as the sctp_abort() could be made common */ 503 static void 504 sctp6_abort(struct socket *so) 505 { 506 struct sctp_inpcb *inp; 507 uint32_t flags; 508 509 inp = (struct sctp_inpcb *)so->so_pcb; 510 if (inp == 0) 511 return; 512 sctp_must_try_again: 513 flags = inp->sctp_flags; 514 #ifdef SCTP_LOG_CLOSING 515 sctp_log_closing(inp, NULL, 17); 516 #endif 517 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 518 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 519 #ifdef SCTP_LOG_CLOSING 520 sctp_log_closing(inp, NULL, 16); 521 #endif 522 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 523 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 524 SOCK_LOCK(so); 525 SCTP_SB_CLEAR(so->so_snd); 526 /* 527 * same for the rcv ones, they are only here for the 528 * accounting/select. 529 */ 530 SCTP_SB_CLEAR(so->so_rcv); 531 /* Now null out the reference, we are completely detached. */ 532 so->so_pcb = NULL; 533 SOCK_UNLOCK(so); 534 } else { 535 flags = inp->sctp_flags; 536 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 537 goto sctp_must_try_again; 538 } 539 } 540 return; 541 } 542 543 static int 544 sctp6_attach(struct socket *so, int proto, struct thread *p) 545 { 546 struct in6pcb *inp6; 547 int error; 548 struct sctp_inpcb *inp; 549 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 550 551 inp = (struct sctp_inpcb *)so->so_pcb; 552 if (inp != NULL) 553 return EINVAL; 554 555 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 556 error = SCTP_SORESERVE(so, sctp_sendspace, sctp_recvspace); 557 if (error) 558 return error; 559 } 560 error = sctp_inpcb_alloc(so, vrf_id); 561 if (error) 562 return error; 563 inp = (struct sctp_inpcb *)so->so_pcb; 564 SCTP_INP_WLOCK(inp); 565 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 566 inp6 = (struct in6pcb *)inp; 567 568 inp6->inp_vflag |= INP_IPV6; 569 inp6->in6p_hops = -1; /* use kernel default */ 570 inp6->in6p_cksum = -1; /* just to be sure */ 571 #ifdef INET 572 /* 573 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 574 * socket as well, because the socket may be bound to an IPv6 575 * wildcard address, which may match an IPv4-mapped IPv6 address. 576 */ 577 inp6->inp_ip_ttl = ip_defttl; 578 #endif 579 /* 580 * Hmm what about the IPSEC stuff that is missing here but in 581 * sctp_attach()? 582 */ 583 SCTP_INP_WUNLOCK(inp); 584 return 0; 585 } 586 587 static int 588 sctp6_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 if (addr) { 599 if ((addr->sa_family == AF_INET6) && 600 (addr->sa_len != sizeof(struct sockaddr_in6))) { 601 return EINVAL; 602 } 603 if ((addr->sa_family == AF_INET) && 604 (addr->sa_len != sizeof(struct sockaddr_in))) { 605 return EINVAL; 606 } 607 } 608 inp6 = (struct in6pcb *)inp; 609 inp6->inp_vflag &= ~INP_IPV4; 610 inp6->inp_vflag |= INP_IPV6; 611 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 612 if (addr->sa_family == AF_INET) { 613 /* binding v4 addr to v6 socket, so reset flags */ 614 inp6->inp_vflag |= INP_IPV4; 615 inp6->inp_vflag &= ~INP_IPV6; 616 } else { 617 struct sockaddr_in6 *sin6_p; 618 619 sin6_p = (struct sockaddr_in6 *)addr; 620 621 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 622 inp6->inp_vflag |= INP_IPV4; 623 } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 624 struct sockaddr_in sin; 625 626 in6_sin6_2_sin(&sin, sin6_p); 627 inp6->inp_vflag |= INP_IPV4; 628 inp6->inp_vflag &= ~INP_IPV6; 629 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 630 return error; 631 } 632 } 633 } else if (addr != NULL) { 634 /* IPV6_V6ONLY socket */ 635 if (addr->sa_family == AF_INET) { 636 /* can't bind v4 addr to v6 only socket! */ 637 return EINVAL; 638 } else { 639 struct sockaddr_in6 *sin6_p; 640 641 sin6_p = (struct sockaddr_in6 *)addr; 642 643 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) 644 /* can't bind v4-mapped addrs either! */ 645 /* NOTE: we don't support SIIT */ 646 return EINVAL; 647 } 648 } 649 error = sctp_inpcb_bind(so, addr, NULL, p); 650 return error; 651 } 652 653 654 static void 655 sctp6_close(struct socket *so) 656 { 657 struct sctp_inpcb *inp; 658 uint32_t flags; 659 660 inp = (struct sctp_inpcb *)so->so_pcb; 661 if (inp == 0) 662 return; 663 664 /* 665 * Inform all the lower layer assoc that we are done. 666 */ 667 sctp_must_try_again: 668 flags = inp->sctp_flags; 669 #ifdef SCTP_LOG_CLOSING 670 sctp_log_closing(inp, NULL, 17); 671 #endif 672 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 673 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 674 if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || 675 (so->so_rcv.sb_cc > 0)) { 676 #ifdef SCTP_LOG_CLOSING 677 sctp_log_closing(inp, NULL, 13); 678 #endif 679 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT 680 ,SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 681 } else { 682 #ifdef SCTP_LOG_CLOSING 683 sctp_log_closing(inp, NULL, 14); 684 #endif 685 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 686 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 687 } 688 /* 689 * The socket is now detached, no matter what the state of 690 * the SCTP association. 691 */ 692 SOCK_LOCK(so); 693 SCTP_SB_CLEAR(so->so_snd); 694 /* 695 * same for the rcv ones, they are only here for the 696 * accounting/select. 697 */ 698 SCTP_SB_CLEAR(so->so_rcv); 699 /* Now null out the reference, we are completely detached. */ 700 so->so_pcb = NULL; 701 SOCK_UNLOCK(so); 702 } else { 703 flags = inp->sctp_flags; 704 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 705 goto sctp_must_try_again; 706 } 707 } 708 return; 709 710 } 711 712 /* This could be made common with sctp_detach() since they are identical */ 713 714 static 715 int 716 sctp6_disconnect(struct socket *so) 717 { 718 struct sctp_inpcb *inp; 719 720 inp = (struct sctp_inpcb *)so->so_pcb; 721 if (inp == NULL) { 722 return (ENOTCONN); 723 } 724 SCTP_INP_RLOCK(inp); 725 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 726 if (SCTP_LIST_EMPTY(&inp->sctp_asoc_list)) { 727 /* No connection */ 728 SCTP_INP_RUNLOCK(inp); 729 return (ENOTCONN); 730 } else { 731 int some_on_streamwheel = 0; 732 struct sctp_association *asoc; 733 struct sctp_tcb *stcb; 734 735 stcb = LIST_FIRST(&inp->sctp_asoc_list); 736 if (stcb == NULL) { 737 SCTP_INP_RUNLOCK(inp); 738 return (EINVAL); 739 } 740 SCTP_TCB_LOCK(stcb); 741 asoc = &stcb->asoc; 742 if (((so->so_options & SO_LINGER) && 743 (so->so_linger == 0)) || 744 (so->so_rcv.sb_cc > 0)) { 745 if (SCTP_GET_STATE(asoc) != 746 SCTP_STATE_COOKIE_WAIT) { 747 /* Left with Data unread */ 748 struct mbuf *op_err; 749 750 op_err = sctp_generate_invmanparam(SCTP_CAUSE_USER_INITIATED_ABT); 751 sctp_send_abort_tcb(stcb, op_err); 752 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 753 } 754 SCTP_INP_RUNLOCK(inp); 755 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 756 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 757 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 758 } 759 sctp_free_assoc(inp, stcb, SCTP_DONOT_SETSCOPE, 760 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 761 /* No unlock tcb assoc is gone */ 762 return (0); 763 } 764 if (!TAILQ_EMPTY(&asoc->out_wheel)) { 765 /* Check to see if some data queued */ 766 struct sctp_stream_out *outs; 767 768 TAILQ_FOREACH(outs, &asoc->out_wheel, 769 next_spoke) { 770 if (!TAILQ_EMPTY(&outs->outqueue)) { 771 some_on_streamwheel = 1; 772 break; 773 } 774 } 775 } 776 if (TAILQ_EMPTY(&asoc->send_queue) && 777 TAILQ_EMPTY(&asoc->sent_queue) && 778 (some_on_streamwheel == 0)) { 779 /* nothing queued to send, so I'm done... */ 780 if ((SCTP_GET_STATE(asoc) != 781 SCTP_STATE_SHUTDOWN_SENT) && 782 (SCTP_GET_STATE(asoc) != 783 SCTP_STATE_SHUTDOWN_ACK_SENT)) { 784 /* only send SHUTDOWN the first time */ 785 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 786 sctp_chunk_output(stcb->sctp_ep, stcb, 1); 787 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 788 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 789 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 790 } 791 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 792 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 793 stcb->sctp_ep, stcb, 794 asoc->primary_destination); 795 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 796 stcb->sctp_ep, stcb, 797 asoc->primary_destination); 798 } 799 } else { 800 /* 801 * we still got (or just got) data to send, 802 * so set SHUTDOWN_PENDING 803 */ 804 /* 805 * XXX sockets draft says that MSG_EOF 806 * should be sent with no data. currently, 807 * we will allow user data to be sent first 808 * and move to SHUTDOWN-PENDING 809 */ 810 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 811 } 812 SCTP_TCB_UNLOCK(stcb); 813 SCTP_INP_RUNLOCK(inp); 814 return (0); 815 } 816 } else { 817 /* UDP model does not support this */ 818 SCTP_INP_RUNLOCK(inp); 819 return EOPNOTSUPP; 820 } 821 } 822 823 824 int 825 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 826 struct mbuf *control, struct thread *p); 827 828 829 static int 830 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 831 struct mbuf *control, struct thread *p) 832 { 833 struct sctp_inpcb *inp; 834 struct inpcb *in_inp; 835 struct in6pcb *inp6; 836 837 #ifdef INET 838 struct sockaddr_in6 *sin6; 839 840 #endif /* INET */ 841 /* No SPL needed since sctp_output does this */ 842 843 inp = (struct sctp_inpcb *)so->so_pcb; 844 if (inp == NULL) { 845 if (control) { 846 SCTP_RELEASE_PKT(control); 847 control = NULL; 848 } 849 SCTP_RELEASE_PKT(m); 850 return EINVAL; 851 } 852 in_inp = (struct inpcb *)inp; 853 inp6 = (struct in6pcb *)inp; 854 /* 855 * For the TCP model we may get a NULL addr, if we are a connected 856 * socket thats ok. 857 */ 858 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 859 (addr == NULL)) { 860 goto connected_type; 861 } 862 if (addr == NULL) { 863 SCTP_RELEASE_PKT(m); 864 if (control) { 865 SCTP_RELEASE_PKT(control); 866 control = NULL; 867 } 868 return (EDESTADDRREQ); 869 } 870 #ifdef INET 871 sin6 = (struct sockaddr_in6 *)addr; 872 if (SCTP_IPV6_V6ONLY(inp6)) { 873 /* 874 * if IPV6_V6ONLY flag, we discard datagrams destined to a 875 * v4 addr or v4-mapped addr 876 */ 877 if (addr->sa_family == AF_INET) { 878 return EINVAL; 879 } 880 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 881 return EINVAL; 882 } 883 } 884 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 885 if (!ip6_v6only) { 886 struct sockaddr_in sin; 887 888 /* convert v4-mapped into v4 addr and send */ 889 in6_sin6_2_sin(&sin, sin6); 890 return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 891 control, p); 892 } else { 893 /* mapped addresses aren't enabled */ 894 return EINVAL; 895 } 896 } 897 #endif /* INET */ 898 connected_type: 899 /* now what about control */ 900 if (control) { 901 if (inp->control) { 902 SCTP_PRINTF("huh? control set?\n"); 903 SCTP_RELEASE_PKT(inp->control); 904 inp->control = NULL; 905 } 906 inp->control = control; 907 } 908 /* Place the data */ 909 if (inp->pkt) { 910 SCTP_BUF_NEXT(inp->pkt_last) = m; 911 inp->pkt_last = m; 912 } else { 913 inp->pkt_last = inp->pkt = m; 914 } 915 if ( 916 /* FreeBSD and MacOSX uses a flag passed */ 917 ((flags & PRUS_MORETOCOME) == 0) 918 ) { 919 /* 920 * note with the current version this code will only be used 921 * by OpenBSD, NetBSD and FreeBSD have methods for 922 * re-defining sosend() to use sctp_sosend(). One can 923 * optionaly switch back to this code (by changing back the 924 * defininitions but this is not advisable. 925 */ 926 int ret; 927 928 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 929 inp->pkt = NULL; 930 inp->control = NULL; 931 return (ret); 932 } else { 933 return (0); 934 } 935 } 936 937 static int 938 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 939 { 940 uint32_t vrf_id; 941 int error = 0; 942 struct sctp_inpcb *inp; 943 struct in6pcb *inp6; 944 struct sctp_tcb *stcb; 945 946 #ifdef INET 947 struct sockaddr_in6 *sin6; 948 struct sockaddr_storage ss; 949 950 #endif /* INET */ 951 952 inp6 = (struct in6pcb *)so->so_pcb; 953 inp = (struct sctp_inpcb *)so->so_pcb; 954 if (inp == 0) { 955 return (ECONNRESET); /* I made the same as TCP since we are 956 * not setup? */ 957 } 958 if (addr == NULL) { 959 return (EINVAL); 960 } 961 if ((addr->sa_family == AF_INET6) && (addr->sa_len != sizeof(struct sockaddr_in6))) { 962 return (EINVAL); 963 } 964 if ((addr->sa_family == AF_INET) && (addr->sa_len != sizeof(struct sockaddr_in))) { 965 return (EINVAL); 966 } 967 vrf_id = inp->def_vrf_id; 968 SCTP_ASOC_CREATE_LOCK(inp); 969 SCTP_INP_RLOCK(inp); 970 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 971 SCTP_PCB_FLAGS_UNBOUND) { 972 /* Bind a ephemeral port */ 973 SCTP_INP_RUNLOCK(inp); 974 error = sctp6_bind(so, NULL, p); 975 if (error) { 976 SCTP_ASOC_CREATE_UNLOCK(inp); 977 978 return (error); 979 } 980 SCTP_INP_RLOCK(inp); 981 } 982 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 983 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 984 /* We are already connected AND the TCP model */ 985 SCTP_INP_RUNLOCK(inp); 986 SCTP_ASOC_CREATE_UNLOCK(inp); 987 return (EADDRINUSE); 988 } 989 #ifdef INET 990 sin6 = (struct sockaddr_in6 *)addr; 991 if (SCTP_IPV6_V6ONLY(inp6)) { 992 /* 993 * if IPV6_V6ONLY flag, ignore connections destined to a v4 994 * addr or v4-mapped addr 995 */ 996 if (addr->sa_family == AF_INET) { 997 SCTP_INP_RUNLOCK(inp); 998 SCTP_ASOC_CREATE_UNLOCK(inp); 999 return EINVAL; 1000 } 1001 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1002 SCTP_INP_RUNLOCK(inp); 1003 SCTP_ASOC_CREATE_UNLOCK(inp); 1004 return EINVAL; 1005 } 1006 } 1007 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1008 if (!ip6_v6only) { 1009 /* convert v4-mapped into v4 addr */ 1010 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 1011 addr = (struct sockaddr *)&ss; 1012 } else { 1013 /* mapped addresses aren't enabled */ 1014 SCTP_INP_RUNLOCK(inp); 1015 SCTP_ASOC_CREATE_UNLOCK(inp); 1016 return EINVAL; 1017 } 1018 } else 1019 #endif /* INET */ 1020 addr = addr; /* for true v6 address case */ 1021 1022 /* Now do we connect? */ 1023 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1024 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1025 if (stcb) { 1026 SCTP_TCB_UNLOCK(stcb); 1027 } 1028 SCTP_INP_RUNLOCK(inp); 1029 } else { 1030 SCTP_INP_RUNLOCK(inp); 1031 SCTP_INP_WLOCK(inp); 1032 SCTP_INP_INCR_REF(inp); 1033 SCTP_INP_WUNLOCK(inp); 1034 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 1035 if (stcb == NULL) { 1036 SCTP_INP_WLOCK(inp); 1037 SCTP_INP_DECR_REF(inp); 1038 SCTP_INP_WUNLOCK(inp); 1039 } 1040 } 1041 1042 if (stcb != NULL) { 1043 /* Already have or am bring up an association */ 1044 SCTP_ASOC_CREATE_UNLOCK(inp); 1045 SCTP_TCB_UNLOCK(stcb); 1046 return (EALREADY); 1047 } 1048 /* We are GOOD to go */ 1049 stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id); 1050 SCTP_ASOC_CREATE_UNLOCK(inp); 1051 if (stcb == NULL) { 1052 /* Gak! no memory */ 1053 return (error); 1054 } 1055 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1056 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1057 /* Set the connected flag so we can queue data */ 1058 soisconnecting(so); 1059 } 1060 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1061 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1062 1063 /* initialize authentication parameters for the assoc */ 1064 sctp_initialize_auth_params(inp, stcb); 1065 1066 sctp_send_initiate(inp, stcb); 1067 SCTP_TCB_UNLOCK(stcb); 1068 return error; 1069 } 1070 1071 static int 1072 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 1073 { 1074 struct sockaddr_in6 *sin6; 1075 struct sctp_inpcb *inp; 1076 uint32_t vrf_id; 1077 struct sctp_ifa *sctp_ifa; 1078 1079 int error; 1080 1081 /* 1082 * Do the malloc first in case it blocks. 1083 */ 1084 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1085 sin6->sin6_family = AF_INET6; 1086 sin6->sin6_len = sizeof(*sin6); 1087 1088 inp = (struct sctp_inpcb *)so->so_pcb; 1089 if (inp == NULL) { 1090 SCTP_FREE_SONAME(sin6); 1091 return ECONNRESET; 1092 } 1093 SCTP_INP_RLOCK(inp); 1094 sin6->sin6_port = inp->sctp_lport; 1095 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1096 /* For the bound all case you get back 0 */ 1097 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1098 struct sctp_tcb *stcb; 1099 struct sockaddr_in6 *sin_a6; 1100 struct sctp_nets *net; 1101 int fnd; 1102 1103 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1104 if (stcb == NULL) { 1105 goto notConn6; 1106 } 1107 fnd = 0; 1108 sin_a6 = NULL; 1109 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1110 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1111 if (sin_a6 == NULL) 1112 /* this will make coverity happy */ 1113 continue; 1114 1115 if (sin_a6->sin6_family == AF_INET6) { 1116 fnd = 1; 1117 break; 1118 } 1119 } 1120 if ((!fnd) || (sin_a6 == NULL)) { 1121 /* punt */ 1122 goto notConn6; 1123 } 1124 vrf_id = inp->def_vrf_id; 1125 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1126 if (sctp_ifa) { 1127 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1128 } 1129 } else { 1130 /* For the bound all case you get back 0 */ 1131 notConn6: 1132 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1133 } 1134 } else { 1135 /* Take the first IPv6 address in the list */ 1136 struct sctp_laddr *laddr; 1137 int fnd = 0; 1138 1139 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1140 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1141 struct sockaddr_in6 *sin_a; 1142 1143 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1144 sin6->sin6_addr = sin_a->sin6_addr; 1145 fnd = 1; 1146 break; 1147 } 1148 } 1149 if (!fnd) { 1150 SCTP_FREE_SONAME(sin6); 1151 SCTP_INP_RUNLOCK(inp); 1152 return ENOENT; 1153 } 1154 } 1155 SCTP_INP_RUNLOCK(inp); 1156 /* Scoping things for v6 */ 1157 if ((error = sa6_recoverscope(sin6)) != 0) { 1158 SCTP_FREE_SONAME(sin6); 1159 return (error); 1160 } 1161 (*addr) = (struct sockaddr *)sin6; 1162 return (0); 1163 } 1164 1165 static int 1166 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1167 { 1168 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1169 int fnd; 1170 struct sockaddr_in6 *sin_a6; 1171 struct sctp_inpcb *inp; 1172 struct sctp_tcb *stcb; 1173 struct sctp_nets *net; 1174 1175 int error; 1176 1177 /* 1178 * Do the malloc first in case it blocks. 1179 */ 1180 inp = (struct sctp_inpcb *)so->so_pcb; 1181 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1182 /* UDP type and listeners will drop out here */ 1183 return (ENOTCONN); 1184 } 1185 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1186 sin6->sin6_family = AF_INET6; 1187 sin6->sin6_len = sizeof(*sin6); 1188 1189 /* We must recapture incase we blocked */ 1190 inp = (struct sctp_inpcb *)so->so_pcb; 1191 if (inp == NULL) { 1192 SCTP_FREE_SONAME(sin6); 1193 return ECONNRESET; 1194 } 1195 SCTP_INP_RLOCK(inp); 1196 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1197 if (stcb) { 1198 SCTP_TCB_LOCK(stcb); 1199 } 1200 SCTP_INP_RUNLOCK(inp); 1201 if (stcb == NULL) { 1202 SCTP_FREE_SONAME(sin6); 1203 return ECONNRESET; 1204 } 1205 fnd = 0; 1206 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1207 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1208 if (sin_a6->sin6_family == AF_INET6) { 1209 fnd = 1; 1210 sin6->sin6_port = stcb->rport; 1211 sin6->sin6_addr = sin_a6->sin6_addr; 1212 break; 1213 } 1214 } 1215 SCTP_TCB_UNLOCK(stcb); 1216 if (!fnd) { 1217 /* No IPv4 address */ 1218 SCTP_FREE_SONAME(sin6); 1219 return ENOENT; 1220 } 1221 if ((error = sa6_recoverscope(sin6)) != 0) 1222 return (error); 1223 *addr = (struct sockaddr *)sin6; 1224 return (0); 1225 } 1226 1227 static int 1228 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1229 { 1230 struct sockaddr *addr; 1231 struct in6pcb *inp6 = sotoin6pcb(so); 1232 int error; 1233 1234 if (inp6 == NULL) 1235 return EINVAL; 1236 1237 /* allow v6 addresses precedence */ 1238 error = sctp6_getaddr(so, nam); 1239 if (error) { 1240 /* try v4 next if v6 failed */ 1241 error = sctp_ingetaddr(so, nam); 1242 if (error) { 1243 return (error); 1244 } 1245 addr = *nam; 1246 /* if I'm V6ONLY, convert it to v4-mapped */ 1247 if (SCTP_IPV6_V6ONLY(inp6)) { 1248 struct sockaddr_in6 sin6; 1249 1250 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1251 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1252 1253 } 1254 } 1255 return (error); 1256 } 1257 1258 1259 static int 1260 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1261 { 1262 struct sockaddr *addr = *nam; 1263 struct in6pcb *inp6 = sotoin6pcb(so); 1264 int error; 1265 1266 if (inp6 == NULL) 1267 return EINVAL; 1268 1269 /* allow v6 addresses precedence */ 1270 error = sctp6_peeraddr(so, nam); 1271 if (error) { 1272 /* try v4 next if v6 failed */ 1273 error = sctp_peeraddr(so, nam); 1274 if (error) { 1275 return (error); 1276 } 1277 /* if I'm V6ONLY, convert it to v4-mapped */ 1278 if (SCTP_IPV6_V6ONLY(inp6)) { 1279 struct sockaddr_in6 sin6; 1280 1281 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1282 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1283 } 1284 } 1285 return error; 1286 } 1287 1288 struct pr_usrreqs sctp6_usrreqs = { 1289 .pru_abort = sctp6_abort, 1290 .pru_accept = sctp_accept, 1291 .pru_attach = sctp6_attach, 1292 .pru_bind = sctp6_bind, 1293 .pru_connect = sctp6_connect, 1294 .pru_control = in6_control, 1295 .pru_close = sctp6_close, 1296 .pru_detach = sctp6_close, 1297 .pru_sopoll = sopoll_generic, 1298 .pru_disconnect = sctp6_disconnect, 1299 .pru_listen = sctp_listen, 1300 .pru_peeraddr = sctp6_getpeeraddr, 1301 .pru_send = sctp6_send, 1302 .pru_shutdown = sctp_shutdown, 1303 .pru_sockaddr = sctp6_in6getaddr, 1304 .pru_sosend = sctp_sosend, 1305 .pru_soreceive = sctp_soreceive 1306 }; 1307