1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #ifdef INET6 38 #include <sys/proc.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctp_var.h> 42 #ifdef INET6 43 #include <netinet6/sctp6_var.h> 44 #endif 45 #include <netinet/sctp_sysctl.h> 46 #include <netinet/sctp_output.h> 47 #include <netinet/sctp_uio.h> 48 #include <netinet/sctp_asconf.h> 49 #include <netinet/sctputil.h> 50 #include <netinet/sctp_indata.h> 51 #include <netinet/sctp_timer.h> 52 #include <netinet/sctp_auth.h> 53 #include <netinet/sctp_input.h> 54 #include <netinet/sctp_output.h> 55 #include <netinet/sctp_bsd_addr.h> 56 #include <netinet/sctp_crc32.h> 57 #include <netinet/udp.h> 58 59 #ifdef IPSEC 60 #include <netipsec/ipsec.h> 61 #ifdef INET6 62 #include <netipsec/ipsec6.h> 63 #endif /* INET6 */ 64 #endif /* IPSEC */ 65 66 extern struct protosw inetsw[]; 67 68 int 69 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 70 { 71 struct mbuf *m; 72 int iphlen; 73 uint32_t vrf_id; 74 uint8_t ecn_bits; 75 struct sockaddr_in6 src, dst; 76 struct ip6_hdr *ip6; 77 struct sctphdr *sh; 78 struct sctp_chunkhdr *ch; 79 int length, offset; 80 81 #if !defined(SCTP_WITH_NO_CSUM) 82 uint8_t compute_crc; 83 84 #endif 85 uint32_t mflowid; 86 uint8_t use_mflowid; 87 88 iphlen = *offp; 89 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 90 SCTP_RELEASE_PKT(*i_pak); 91 return (IPPROTO_DONE); 92 } 93 m = SCTP_HEADER_TO_CHAIN(*i_pak); 94 #ifdef SCTP_MBUF_LOGGING 95 /* Log in any input mbufs */ 96 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 97 struct mbuf *mat; 98 99 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { 100 if (SCTP_BUF_IS_EXTENDED(mat)) { 101 sctp_log_mb(mat, SCTP_MBUF_INPUT); 102 } 103 } 104 } 105 #endif 106 #ifdef SCTP_PACKET_LOGGING 107 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 108 sctp_packet_log(m); 109 } 110 #endif 111 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 112 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 113 m->m_pkthdr.len, 114 if_name(m->m_pkthdr.rcvif), 115 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 116 if (m->m_flags & M_FLOWID) { 117 mflowid = m->m_pkthdr.flowid; 118 use_mflowid = 1; 119 } else { 120 mflowid = 0; 121 use_mflowid = 0; 122 } 123 SCTP_STAT_INCR(sctps_recvpackets); 124 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 125 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 126 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 127 ip6 = mtod(m, struct ip6_hdr *); 128 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 129 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 130 if (sh == NULL) { 131 SCTP_STAT_INCR(sctps_hdrops); 132 return (IPPROTO_DONE); 133 } 134 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 135 offset -= sizeof(struct sctp_chunkhdr); 136 memset(&src, 0, sizeof(struct sockaddr_in6)); 137 src.sin6_family = AF_INET6; 138 src.sin6_len = sizeof(struct sockaddr_in6); 139 src.sin6_port = sh->src_port; 140 src.sin6_addr = ip6->ip6_src; 141 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 142 goto out; 143 } 144 memset(&dst, 0, sizeof(struct sockaddr_in6)); 145 dst.sin6_family = AF_INET6; 146 dst.sin6_len = sizeof(struct sockaddr_in6); 147 dst.sin6_port = sh->dest_port; 148 dst.sin6_addr = ip6->ip6_dst; 149 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 150 goto out; 151 } 152 if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) { 153 /* XXX send icmp6 host/port unreach? */ 154 goto out; 155 } 156 length = ntohs(ip6->ip6_plen) + iphlen; 157 /* Validate mbuf chain length with IP payload length. */ 158 if (SCTP_HEADER_LEN(m) != length) { 159 SCTPDBG(SCTP_DEBUG_INPUT1, 160 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 161 SCTP_STAT_INCR(sctps_hdrops); 162 goto out; 163 } 164 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 165 goto out; 166 } 167 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 168 #if defined(SCTP_WITH_NO_CSUM) 169 SCTP_STAT_INCR(sctps_recvnocrc); 170 #else 171 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 172 SCTP_STAT_INCR(sctps_recvhwcrc); 173 compute_crc = 0; 174 } else { 175 SCTP_STAT_INCR(sctps_recvswcrc); 176 compute_crc = 1; 177 } 178 #endif 179 sctp_common_input_processing(&m, iphlen, offset, length, 180 (struct sockaddr *)&src, 181 (struct sockaddr *)&dst, 182 sh, ch, 183 #if !defined(SCTP_WITH_NO_CSUM) 184 compute_crc, 185 #endif 186 ecn_bits, 187 use_mflowid, mflowid, 188 vrf_id, port); 189 out: 190 if (m) { 191 sctp_m_freem(m); 192 } 193 return (IPPROTO_DONE); 194 } 195 196 197 int 198 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 199 { 200 return (sctp6_input_with_port(i_pak, offp, 0)); 201 } 202 203 static void 204 sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 205 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 206 { 207 uint32_t nxtsz; 208 209 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 210 (icmp6 == NULL) || (sh == NULL)) { 211 goto out; 212 } 213 /* First do we even look at it? */ 214 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 215 goto out; 216 217 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 218 /* not PACKET TO BIG */ 219 goto out; 220 } 221 /* 222 * ok we need to look closely. We could even get smarter and look at 223 * anyone that we sent to in case we get a different ICMP that tells 224 * us there is no way to reach a host, but for this impl, all we 225 * care about is MTU discovery. 226 */ 227 nxtsz = ntohl(icmp6->icmp6_mtu); 228 /* Stop any PMTU timer */ 229 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 230 231 /* Adjust destination size limit */ 232 if (net->mtu > nxtsz) { 233 net->mtu = nxtsz; 234 if (net->port) { 235 net->mtu -= sizeof(struct udphdr); 236 } 237 } 238 /* now what about the ep? */ 239 if (stcb->asoc.smallest_mtu > nxtsz) { 240 struct sctp_tmit_chunk *chk; 241 242 /* Adjust that too */ 243 stcb->asoc.smallest_mtu = nxtsz; 244 /* now off to subtract IP_DF flag if needed */ 245 246 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 247 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 248 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 249 } 250 } 251 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 252 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 253 /* 254 * For this guy we also mark for immediate 255 * resend since we sent to big of chunk 256 */ 257 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 258 if (chk->sent != SCTP_DATAGRAM_RESEND) 259 stcb->asoc.sent_queue_retran_cnt++; 260 chk->sent = SCTP_DATAGRAM_RESEND; 261 chk->rec.data.doing_fast_retransmit = 0; 262 263 chk->sent = SCTP_DATAGRAM_RESEND; 264 /* Clear any time so NO RTT is being done */ 265 chk->sent_rcv_time.tv_sec = 0; 266 chk->sent_rcv_time.tv_usec = 0; 267 stcb->asoc.total_flight -= chk->send_size; 268 net->flight_size -= chk->send_size; 269 } 270 } 271 } 272 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 273 out: 274 if (stcb) { 275 SCTP_TCB_UNLOCK(stcb); 276 } 277 } 278 279 280 void 281 sctp6_notify(struct sctp_inpcb *inp, 282 struct icmp6_hdr *icmph, 283 struct sctphdr *sh, 284 struct sockaddr *to, 285 struct sctp_tcb *stcb, 286 struct sctp_nets *net) 287 { 288 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 289 struct socket *so; 290 291 #endif 292 293 /* protection */ 294 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 295 (sh == NULL) || (to == NULL)) { 296 if (stcb) 297 SCTP_TCB_UNLOCK(stcb); 298 return; 299 } 300 /* First job is to verify the vtag matches what I would send */ 301 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 302 SCTP_TCB_UNLOCK(stcb); 303 return; 304 } 305 if (icmph->icmp6_type != ICMP_UNREACH) { 306 /* We only care about unreachable */ 307 SCTP_TCB_UNLOCK(stcb); 308 return; 309 } 310 if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 311 (icmph->icmp6_code == ICMP_UNREACH_HOST) || 312 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 313 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 314 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 315 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 316 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 317 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 318 319 /* 320 * Hmm reachablity problems we must examine closely. If its 321 * not reachable, we may have lost a network. Or if there is 322 * NO protocol at the other end named SCTP. well we consider 323 * it a OOTB abort. 324 */ 325 if (net->dest_state & SCTP_ADDR_REACHABLE) { 326 /* Ok that destination is NOT reachable */ 327 net->dest_state &= ~SCTP_ADDR_REACHABLE; 328 net->dest_state &= ~SCTP_ADDR_PF; 329 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 330 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 331 } 332 SCTP_TCB_UNLOCK(stcb); 333 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 334 (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 335 /* 336 * Here the peer is either playing tricks on us, including 337 * an address that belongs to someone who does not support 338 * SCTP OR was a userland implementation that shutdown and 339 * now is dead. In either case treat it like a OOTB abort 340 * with no TCB 341 */ 342 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 343 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 344 so = SCTP_INP_SO(inp); 345 atomic_add_int(&stcb->asoc.refcnt, 1); 346 SCTP_TCB_UNLOCK(stcb); 347 SCTP_SOCKET_LOCK(so, 1); 348 SCTP_TCB_LOCK(stcb); 349 atomic_subtract_int(&stcb->asoc.refcnt, 1); 350 #endif 351 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 352 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 353 SCTP_SOCKET_UNLOCK(so, 1); 354 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 355 #endif 356 /* no need to unlock here, since the TCB is gone */ 357 } else { 358 SCTP_TCB_UNLOCK(stcb); 359 } 360 } 361 362 363 364 void 365 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 366 { 367 struct sctphdr sh; 368 struct ip6ctlparam *ip6cp = NULL; 369 uint32_t vrf_id; 370 371 vrf_id = SCTP_DEFAULT_VRFID; 372 373 if (pktdst->sa_family != AF_INET6 || 374 pktdst->sa_len != sizeof(struct sockaddr_in6)) 375 return; 376 377 if ((unsigned)cmd >= PRC_NCMDS) 378 return; 379 if (PRC_IS_REDIRECT(cmd)) { 380 d = NULL; 381 } else if (inet6ctlerrmap[cmd] == 0) { 382 return; 383 } 384 /* if the parameter is from icmp6, decode it. */ 385 if (d != NULL) { 386 ip6cp = (struct ip6ctlparam *)d; 387 } else { 388 ip6cp = (struct ip6ctlparam *)NULL; 389 } 390 391 if (ip6cp) { 392 /* 393 * XXX: We assume that when IPV6 is non NULL, M and OFF are 394 * valid. 395 */ 396 /* check if we can safely examine src and dst ports */ 397 struct sctp_inpcb *inp = NULL; 398 struct sctp_tcb *stcb = NULL; 399 struct sctp_nets *net = NULL; 400 struct sockaddr_in6 final; 401 402 if (ip6cp->ip6c_m == NULL) 403 return; 404 405 bzero(&sh, sizeof(sh)); 406 bzero(&final, sizeof(final)); 407 inp = NULL; 408 net = NULL; 409 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 410 (caddr_t)&sh); 411 ip6cp->ip6c_src->sin6_port = sh.src_port; 412 final.sin6_len = sizeof(final); 413 final.sin6_family = AF_INET6; 414 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 415 final.sin6_port = sh.dest_port; 416 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 417 (struct sockaddr *)ip6cp->ip6c_src, 418 &inp, &net, 1, vrf_id); 419 /* inp's ref-count increased && stcb locked */ 420 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 421 if (cmd == PRC_MSGSIZE) { 422 sctp6_notify_mbuf(inp, 423 ip6cp->ip6c_icmp6, 424 &sh, 425 stcb, 426 net); 427 /* inp's ref-count reduced && stcb unlocked */ 428 } else { 429 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 430 (struct sockaddr *)&final, 431 stcb, net); 432 /* inp's ref-count reduced && stcb unlocked */ 433 } 434 } else { 435 if (PRC_IS_REDIRECT(cmd) && inp) { 436 in6_rtchange((struct in6pcb *)inp, 437 inet6ctlerrmap[cmd]); 438 } 439 if (inp) { 440 /* reduce inp's ref-count */ 441 SCTP_INP_WLOCK(inp); 442 SCTP_INP_DECR_REF(inp); 443 SCTP_INP_WUNLOCK(inp); 444 } 445 if (stcb) 446 SCTP_TCB_UNLOCK(stcb); 447 } 448 } 449 } 450 451 /* 452 * this routine can probably be collasped into the one in sctp_userreq.c 453 * since they do the same thing and now we lookup with a sockaddr 454 */ 455 static int 456 sctp6_getcred(SYSCTL_HANDLER_ARGS) 457 { 458 struct xucred xuc; 459 struct sockaddr_in6 addrs[2]; 460 struct sctp_inpcb *inp; 461 struct sctp_nets *net; 462 struct sctp_tcb *stcb; 463 int error; 464 uint32_t vrf_id; 465 466 vrf_id = SCTP_DEFAULT_VRFID; 467 468 error = priv_check(req->td, PRIV_NETINET_GETCRED); 469 if (error) 470 return (error); 471 472 if (req->newlen != sizeof(addrs)) { 473 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 474 return (EINVAL); 475 } 476 if (req->oldlen != sizeof(struct ucred)) { 477 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 478 return (EINVAL); 479 } 480 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 481 if (error) 482 return (error); 483 484 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 485 sin6tosa(&addrs[0]), 486 &inp, &net, 1, vrf_id); 487 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 488 if ((inp != NULL) && (stcb == NULL)) { 489 /* reduce ref-count */ 490 SCTP_INP_WLOCK(inp); 491 SCTP_INP_DECR_REF(inp); 492 goto cred_can_cont; 493 } 494 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 495 error = ENOENT; 496 goto out; 497 } 498 SCTP_TCB_UNLOCK(stcb); 499 /* 500 * We use the write lock here, only since in the error leg we need 501 * it. If we used RLOCK, then we would have to 502 * wlock/decr/unlock/rlock. Which in theory could create a hole. 503 * Better to use higher wlock. 504 */ 505 SCTP_INP_WLOCK(inp); 506 cred_can_cont: 507 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 508 if (error) { 509 SCTP_INP_WUNLOCK(inp); 510 goto out; 511 } 512 cru2x(inp->sctp_socket->so_cred, &xuc); 513 SCTP_INP_WUNLOCK(inp); 514 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 515 out: 516 return (error); 517 } 518 519 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 520 0, 0, 521 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 522 523 524 /* This is the same as the sctp_abort() could be made common */ 525 static void 526 sctp6_abort(struct socket *so) 527 { 528 struct sctp_inpcb *inp; 529 uint32_t flags; 530 531 inp = (struct sctp_inpcb *)so->so_pcb; 532 if (inp == NULL) { 533 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 534 return; 535 } 536 sctp_must_try_again: 537 flags = inp->sctp_flags; 538 #ifdef SCTP_LOG_CLOSING 539 sctp_log_closing(inp, NULL, 17); 540 #endif 541 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 542 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 543 #ifdef SCTP_LOG_CLOSING 544 sctp_log_closing(inp, NULL, 16); 545 #endif 546 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 547 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 548 SOCK_LOCK(so); 549 SCTP_SB_CLEAR(so->so_snd); 550 /* 551 * same for the rcv ones, they are only here for the 552 * accounting/select. 553 */ 554 SCTP_SB_CLEAR(so->so_rcv); 555 /* Now null out the reference, we are completely detached. */ 556 so->so_pcb = NULL; 557 SOCK_UNLOCK(so); 558 } else { 559 flags = inp->sctp_flags; 560 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 561 goto sctp_must_try_again; 562 } 563 } 564 return; 565 } 566 567 static int 568 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 569 { 570 struct in6pcb *inp6; 571 int error; 572 struct sctp_inpcb *inp; 573 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 574 575 inp = (struct sctp_inpcb *)so->so_pcb; 576 if (inp != NULL) { 577 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 578 return (EINVAL); 579 } 580 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 581 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 582 if (error) 583 return (error); 584 } 585 error = sctp_inpcb_alloc(so, vrf_id); 586 if (error) 587 return (error); 588 inp = (struct sctp_inpcb *)so->so_pcb; 589 SCTP_INP_WLOCK(inp); 590 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 591 inp6 = (struct in6pcb *)inp; 592 593 inp6->inp_vflag |= INP_IPV6; 594 inp6->in6p_hops = -1; /* use kernel default */ 595 inp6->in6p_cksum = -1; /* just to be sure */ 596 #ifdef INET 597 /* 598 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 599 * socket as well, because the socket may be bound to an IPv6 600 * wildcard address, which may match an IPv4-mapped IPv6 address. 601 */ 602 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 603 #endif 604 /* 605 * Hmm what about the IPSEC stuff that is missing here but in 606 * sctp_attach()? 607 */ 608 SCTP_INP_WUNLOCK(inp); 609 return (0); 610 } 611 612 static int 613 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 614 { 615 struct sctp_inpcb *inp; 616 struct in6pcb *inp6; 617 int error; 618 619 inp = (struct sctp_inpcb *)so->so_pcb; 620 if (inp == NULL) { 621 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 622 return (EINVAL); 623 } 624 if (addr) { 625 switch (addr->sa_family) { 626 #ifdef INET 627 case AF_INET: 628 if (addr->sa_len != sizeof(struct sockaddr_in)) { 629 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 630 return (EINVAL); 631 } 632 break; 633 #endif 634 #ifdef INET6 635 case AF_INET6: 636 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 637 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 638 return (EINVAL); 639 } 640 break; 641 #endif 642 default: 643 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 644 return (EINVAL); 645 } 646 } 647 inp6 = (struct in6pcb *)inp; 648 inp6->inp_vflag &= ~INP_IPV4; 649 inp6->inp_vflag |= INP_IPV6; 650 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 651 switch (addr->sa_family) { 652 #ifdef INET 653 case AF_INET: 654 /* binding v4 addr to v6 socket, so reset flags */ 655 inp6->inp_vflag |= INP_IPV4; 656 inp6->inp_vflag &= ~INP_IPV6; 657 break; 658 #endif 659 #ifdef INET6 660 case AF_INET6: 661 { 662 struct sockaddr_in6 *sin6_p; 663 664 sin6_p = (struct sockaddr_in6 *)addr; 665 666 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 667 inp6->inp_vflag |= INP_IPV4; 668 } 669 #ifdef INET 670 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 671 struct sockaddr_in sin; 672 673 in6_sin6_2_sin(&sin, sin6_p); 674 inp6->inp_vflag |= INP_IPV4; 675 inp6->inp_vflag &= ~INP_IPV6; 676 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 677 return (error); 678 } 679 #endif 680 break; 681 } 682 #endif 683 default: 684 break; 685 } 686 } else if (addr != NULL) { 687 struct sockaddr_in6 *sin6_p; 688 689 /* IPV6_V6ONLY socket */ 690 #ifdef INET 691 if (addr->sa_family == AF_INET) { 692 /* can't bind v4 addr to v6 only socket! */ 693 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 694 return (EINVAL); 695 } 696 #endif 697 sin6_p = (struct sockaddr_in6 *)addr; 698 699 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 700 /* can't bind v4-mapped addrs either! */ 701 /* NOTE: we don't support SIIT */ 702 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 703 return (EINVAL); 704 } 705 } 706 error = sctp_inpcb_bind(so, addr, NULL, p); 707 return (error); 708 } 709 710 711 static void 712 sctp6_close(struct socket *so) 713 { 714 sctp_close(so); 715 } 716 717 /* This could be made common with sctp_detach() since they are identical */ 718 719 static 720 int 721 sctp6_disconnect(struct socket *so) 722 { 723 return (sctp_disconnect(so)); 724 } 725 726 727 int 728 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 729 struct mbuf *control, struct thread *p); 730 731 732 static int 733 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 734 struct mbuf *control, struct thread *p) 735 { 736 struct sctp_inpcb *inp; 737 struct in6pcb *inp6; 738 739 #ifdef INET 740 struct sockaddr_in6 *sin6; 741 742 #endif /* INET */ 743 /* No SPL needed since sctp_output does this */ 744 745 inp = (struct sctp_inpcb *)so->so_pcb; 746 if (inp == NULL) { 747 if (control) { 748 SCTP_RELEASE_PKT(control); 749 control = NULL; 750 } 751 SCTP_RELEASE_PKT(m); 752 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 753 return (EINVAL); 754 } 755 inp6 = (struct in6pcb *)inp; 756 /* 757 * For the TCP model we may get a NULL addr, if we are a connected 758 * socket thats ok. 759 */ 760 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 761 (addr == NULL)) { 762 goto connected_type; 763 } 764 if (addr == NULL) { 765 SCTP_RELEASE_PKT(m); 766 if (control) { 767 SCTP_RELEASE_PKT(control); 768 control = NULL; 769 } 770 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 771 return (EDESTADDRREQ); 772 } 773 #ifdef INET 774 sin6 = (struct sockaddr_in6 *)addr; 775 if (SCTP_IPV6_V6ONLY(inp6)) { 776 /* 777 * if IPV6_V6ONLY flag, we discard datagrams destined to a 778 * v4 addr or v4-mapped addr 779 */ 780 if (addr->sa_family == AF_INET) { 781 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 782 return (EINVAL); 783 } 784 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 785 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 786 return (EINVAL); 787 } 788 } 789 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 790 struct sockaddr_in sin; 791 792 /* convert v4-mapped into v4 addr and send */ 793 in6_sin6_2_sin(&sin, sin6); 794 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 795 } 796 #endif /* INET */ 797 connected_type: 798 /* now what about control */ 799 if (control) { 800 if (inp->control) { 801 SCTP_PRINTF("huh? control set?\n"); 802 SCTP_RELEASE_PKT(inp->control); 803 inp->control = NULL; 804 } 805 inp->control = control; 806 } 807 /* Place the data */ 808 if (inp->pkt) { 809 SCTP_BUF_NEXT(inp->pkt_last) = m; 810 inp->pkt_last = m; 811 } else { 812 inp->pkt_last = inp->pkt = m; 813 } 814 if ( 815 /* FreeBSD and MacOSX uses a flag passed */ 816 ((flags & PRUS_MORETOCOME) == 0) 817 ) { 818 /* 819 * note with the current version this code will only be used 820 * by OpenBSD, NetBSD and FreeBSD have methods for 821 * re-defining sosend() to use sctp_sosend(). One can 822 * optionaly switch back to this code (by changing back the 823 * defininitions but this is not advisable. 824 */ 825 int ret; 826 827 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 828 inp->pkt = NULL; 829 inp->control = NULL; 830 return (ret); 831 } else { 832 return (0); 833 } 834 } 835 836 static int 837 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 838 { 839 uint32_t vrf_id; 840 int error = 0; 841 struct sctp_inpcb *inp; 842 struct sctp_tcb *stcb; 843 844 #ifdef INET 845 struct in6pcb *inp6; 846 struct sockaddr_in6 *sin6; 847 struct sockaddr_storage ss; 848 849 #endif 850 851 #ifdef INET 852 inp6 = (struct in6pcb *)so->so_pcb; 853 #endif 854 inp = (struct sctp_inpcb *)so->so_pcb; 855 if (inp == NULL) { 856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 857 return (ECONNRESET); /* I made the same as TCP since we are 858 * not setup? */ 859 } 860 if (addr == NULL) { 861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 862 return (EINVAL); 863 } 864 switch (addr->sa_family) { 865 #ifdef INET 866 case AF_INET: 867 if (addr->sa_len != sizeof(struct sockaddr_in)) { 868 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 869 return (EINVAL); 870 } 871 break; 872 #endif 873 #ifdef INET6 874 case AF_INET6: 875 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 877 return (EINVAL); 878 } 879 break; 880 #endif 881 default: 882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 883 return (EINVAL); 884 } 885 886 vrf_id = inp->def_vrf_id; 887 SCTP_ASOC_CREATE_LOCK(inp); 888 SCTP_INP_RLOCK(inp); 889 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 890 SCTP_PCB_FLAGS_UNBOUND) { 891 /* Bind a ephemeral port */ 892 SCTP_INP_RUNLOCK(inp); 893 error = sctp6_bind(so, NULL, p); 894 if (error) { 895 SCTP_ASOC_CREATE_UNLOCK(inp); 896 897 return (error); 898 } 899 SCTP_INP_RLOCK(inp); 900 } 901 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 902 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 903 /* We are already connected AND the TCP model */ 904 SCTP_INP_RUNLOCK(inp); 905 SCTP_ASOC_CREATE_UNLOCK(inp); 906 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 907 return (EADDRINUSE); 908 } 909 #ifdef INET 910 sin6 = (struct sockaddr_in6 *)addr; 911 if (SCTP_IPV6_V6ONLY(inp6)) { 912 /* 913 * if IPV6_V6ONLY flag, ignore connections destined to a v4 914 * addr or v4-mapped addr 915 */ 916 if (addr->sa_family == AF_INET) { 917 SCTP_INP_RUNLOCK(inp); 918 SCTP_ASOC_CREATE_UNLOCK(inp); 919 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 920 return (EINVAL); 921 } 922 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 923 SCTP_INP_RUNLOCK(inp); 924 SCTP_ASOC_CREATE_UNLOCK(inp); 925 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 926 return (EINVAL); 927 } 928 } 929 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 930 /* convert v4-mapped into v4 addr */ 931 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 932 addr = (struct sockaddr *)&ss; 933 } 934 #endif /* INET */ 935 /* Now do we connect? */ 936 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 937 stcb = LIST_FIRST(&inp->sctp_asoc_list); 938 if (stcb) { 939 SCTP_TCB_UNLOCK(stcb); 940 } 941 SCTP_INP_RUNLOCK(inp); 942 } else { 943 SCTP_INP_RUNLOCK(inp); 944 SCTP_INP_WLOCK(inp); 945 SCTP_INP_INCR_REF(inp); 946 SCTP_INP_WUNLOCK(inp); 947 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 948 if (stcb == NULL) { 949 SCTP_INP_WLOCK(inp); 950 SCTP_INP_DECR_REF(inp); 951 SCTP_INP_WUNLOCK(inp); 952 } 953 } 954 955 if (stcb != NULL) { 956 /* Already have or am bring up an association */ 957 SCTP_ASOC_CREATE_UNLOCK(inp); 958 SCTP_TCB_UNLOCK(stcb); 959 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 960 return (EALREADY); 961 } 962 /* We are GOOD to go */ 963 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 964 SCTP_ASOC_CREATE_UNLOCK(inp); 965 if (stcb == NULL) { 966 /* Gak! no memory */ 967 return (error); 968 } 969 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 970 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 971 /* Set the connected flag so we can queue data */ 972 soisconnecting(so); 973 } 974 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 975 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 976 977 /* initialize authentication parameters for the assoc */ 978 sctp_initialize_auth_params(inp, stcb); 979 980 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 981 SCTP_TCB_UNLOCK(stcb); 982 return (error); 983 } 984 985 static int 986 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 987 { 988 struct sockaddr_in6 *sin6; 989 struct sctp_inpcb *inp; 990 uint32_t vrf_id; 991 struct sctp_ifa *sctp_ifa; 992 993 int error; 994 995 /* 996 * Do the malloc first in case it blocks. 997 */ 998 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 999 if (sin6 == NULL) 1000 return (ENOMEM); 1001 sin6->sin6_family = AF_INET6; 1002 sin6->sin6_len = sizeof(*sin6); 1003 1004 inp = (struct sctp_inpcb *)so->so_pcb; 1005 if (inp == NULL) { 1006 SCTP_FREE_SONAME(sin6); 1007 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1008 return (ECONNRESET); 1009 } 1010 SCTP_INP_RLOCK(inp); 1011 sin6->sin6_port = inp->sctp_lport; 1012 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1013 /* For the bound all case you get back 0 */ 1014 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1015 struct sctp_tcb *stcb; 1016 struct sockaddr_in6 *sin_a6; 1017 struct sctp_nets *net; 1018 int fnd; 1019 1020 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1021 if (stcb == NULL) { 1022 goto notConn6; 1023 } 1024 fnd = 0; 1025 sin_a6 = NULL; 1026 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1027 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1028 if (sin_a6 == NULL) 1029 /* this will make coverity happy */ 1030 continue; 1031 1032 if (sin_a6->sin6_family == AF_INET6) { 1033 fnd = 1; 1034 break; 1035 } 1036 } 1037 if ((!fnd) || (sin_a6 == NULL)) { 1038 /* punt */ 1039 goto notConn6; 1040 } 1041 vrf_id = inp->def_vrf_id; 1042 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1043 if (sctp_ifa) { 1044 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1045 } 1046 } else { 1047 /* For the bound all case you get back 0 */ 1048 notConn6: 1049 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1050 } 1051 } else { 1052 /* Take the first IPv6 address in the list */ 1053 struct sctp_laddr *laddr; 1054 int fnd = 0; 1055 1056 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1057 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1058 struct sockaddr_in6 *sin_a; 1059 1060 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1061 sin6->sin6_addr = sin_a->sin6_addr; 1062 fnd = 1; 1063 break; 1064 } 1065 } 1066 if (!fnd) { 1067 SCTP_FREE_SONAME(sin6); 1068 SCTP_INP_RUNLOCK(inp); 1069 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1070 return (ENOENT); 1071 } 1072 } 1073 SCTP_INP_RUNLOCK(inp); 1074 /* Scoping things for v6 */ 1075 if ((error = sa6_recoverscope(sin6)) != 0) { 1076 SCTP_FREE_SONAME(sin6); 1077 return (error); 1078 } 1079 (*addr) = (struct sockaddr *)sin6; 1080 return (0); 1081 } 1082 1083 static int 1084 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1085 { 1086 struct sockaddr_in6 *sin6; 1087 int fnd; 1088 struct sockaddr_in6 *sin_a6; 1089 struct sctp_inpcb *inp; 1090 struct sctp_tcb *stcb; 1091 struct sctp_nets *net; 1092 int error; 1093 1094 /* Do the malloc first in case it blocks. */ 1095 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1096 if (sin6 == NULL) 1097 return (ENOMEM); 1098 sin6->sin6_family = AF_INET6; 1099 sin6->sin6_len = sizeof(*sin6); 1100 1101 inp = (struct sctp_inpcb *)so->so_pcb; 1102 if ((inp == NULL) || 1103 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1104 /* UDP type and listeners will drop out here */ 1105 SCTP_FREE_SONAME(sin6); 1106 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1107 return (ENOTCONN); 1108 } 1109 SCTP_INP_RLOCK(inp); 1110 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1111 if (stcb) { 1112 SCTP_TCB_LOCK(stcb); 1113 } 1114 SCTP_INP_RUNLOCK(inp); 1115 if (stcb == NULL) { 1116 SCTP_FREE_SONAME(sin6); 1117 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1118 return (ECONNRESET); 1119 } 1120 fnd = 0; 1121 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1122 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1123 if (sin_a6->sin6_family == AF_INET6) { 1124 fnd = 1; 1125 sin6->sin6_port = stcb->rport; 1126 sin6->sin6_addr = sin_a6->sin6_addr; 1127 break; 1128 } 1129 } 1130 SCTP_TCB_UNLOCK(stcb); 1131 if (!fnd) { 1132 /* No IPv4 address */ 1133 SCTP_FREE_SONAME(sin6); 1134 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1135 return (ENOENT); 1136 } 1137 if ((error = sa6_recoverscope(sin6)) != 0) 1138 return (error); 1139 *addr = (struct sockaddr *)sin6; 1140 return (0); 1141 } 1142 1143 static int 1144 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1145 { 1146 #ifdef INET 1147 struct sockaddr *addr; 1148 1149 #endif 1150 struct in6pcb *inp6 = sotoin6pcb(so); 1151 int error; 1152 1153 if (inp6 == NULL) { 1154 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1155 return (EINVAL); 1156 } 1157 /* allow v6 addresses precedence */ 1158 error = sctp6_getaddr(so, nam); 1159 #ifdef INET 1160 if (error) { 1161 /* try v4 next if v6 failed */ 1162 error = sctp_ingetaddr(so, nam); 1163 if (error) { 1164 return (error); 1165 } 1166 addr = *nam; 1167 /* if I'm V6ONLY, convert it to v4-mapped */ 1168 if (SCTP_IPV6_V6ONLY(inp6)) { 1169 struct sockaddr_in6 sin6; 1170 1171 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1172 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1173 } 1174 } 1175 #endif 1176 return (error); 1177 } 1178 1179 1180 static int 1181 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1182 { 1183 #ifdef INET 1184 struct sockaddr *addr; 1185 1186 #endif 1187 struct in6pcb *inp6 = sotoin6pcb(so); 1188 int error; 1189 1190 if (inp6 == NULL) { 1191 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1192 return (EINVAL); 1193 } 1194 /* allow v6 addresses precedence */ 1195 error = sctp6_peeraddr(so, nam); 1196 #ifdef INET 1197 if (error) { 1198 /* try v4 next if v6 failed */ 1199 error = sctp_peeraddr(so, nam); 1200 if (error) { 1201 return (error); 1202 } 1203 addr = *nam; 1204 /* if I'm V6ONLY, convert it to v4-mapped */ 1205 if (SCTP_IPV6_V6ONLY(inp6)) { 1206 struct sockaddr_in6 sin6; 1207 1208 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1209 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1210 } 1211 } 1212 #endif 1213 return (error); 1214 } 1215 1216 struct pr_usrreqs sctp6_usrreqs = { 1217 .pru_abort = sctp6_abort, 1218 .pru_accept = sctp_accept, 1219 .pru_attach = sctp6_attach, 1220 .pru_bind = sctp6_bind, 1221 .pru_connect = sctp6_connect, 1222 .pru_control = in6_control, 1223 .pru_close = sctp6_close, 1224 .pru_detach = sctp6_close, 1225 .pru_sopoll = sopoll_generic, 1226 .pru_flush = sctp_flush, 1227 .pru_disconnect = sctp6_disconnect, 1228 .pru_listen = sctp_listen, 1229 .pru_peeraddr = sctp6_getpeeraddr, 1230 .pru_send = sctp6_send, 1231 .pru_shutdown = sctp_shutdown, 1232 .pru_sockaddr = sctp6_in6getaddr, 1233 .pru_sosend = sctp_sosend, 1234 .pru_soreceive = sctp_soreceive 1235 }; 1236 1237 #endif 1238