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sys/netinet6/sctp6_usrreq.c
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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: releng/9.1/sys/netinet6/sctp6_usrreq.c 238613 2012-07-19 09:32:59Z tuexen $"); 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(struct mbuf **i_pak, int *offp, int proto) 70 { 71 struct mbuf *m; 72 struct ip6_hdr *ip6; 73 struct sctphdr *sh; 74 struct sctp_inpcb *in6p = NULL; 75 struct sctp_nets *net; 76 int refcount_up = 0; 77 uint32_t vrf_id = 0; 78 79 #ifdef IPSEC 80 struct inpcb *in6p_ip; 81 82 #endif 83 struct sctp_chunkhdr *ch; 84 int length, offset, iphlen; 85 uint8_t ecn_bits; 86 struct sctp_tcb *stcb = NULL; 87 int pkt_len = 0; 88 uint32_t mflowid; 89 uint8_t use_mflowid; 90 91 #if !defined(SCTP_WITH_NO_CSUM) 92 uint32_t check, calc_check; 93 94 #endif 95 int off = *offp; 96 uint16_t port = 0; 97 98 /* get the VRF and table id's */ 99 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 100 SCTP_RELEASE_PKT(*i_pak); 101 return (-1); 102 } 103 m = SCTP_HEADER_TO_CHAIN(*i_pak); 104 pkt_len = SCTP_HEADER_LEN((*i_pak)); 105 106 #ifdef SCTP_PACKET_LOGGING 107 sctp_packet_log(m, pkt_len); 108 #endif 109 if (m->m_flags & M_FLOWID) { 110 mflowid = m->m_pkthdr.flowid; 111 use_mflowid = 1; 112 } else { 113 mflowid = 0; 114 use_mflowid = 0; 115 } 116 ip6 = mtod(m, struct ip6_hdr *); 117 /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ 118 IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, 119 (int)(sizeof(*sh) + sizeof(*ch))); 120 if (sh == NULL) { 121 SCTP_STAT_INCR(sctps_hdrops); 122 return (IPPROTO_DONE); 123 } 124 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 125 iphlen = off; 126 offset = iphlen + sizeof(*sh) + sizeof(*ch); 127 SCTPDBG(SCTP_DEBUG_INPUT1, 128 "sctp6_input() length:%d iphlen:%d\n", pkt_len, iphlen); 129 130 131 #if defined(NFAITH) && NFAITH > 0 132 133 if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { 134 /* XXX send icmp6 host/port unreach? */ 135 goto bad; 136 } 137 #endif /* NFAITH defined and > 0 */ 138 SCTP_STAT_INCR(sctps_recvpackets); 139 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 140 SCTPDBG(SCTP_DEBUG_INPUT1, "V6 input gets a packet iphlen:%d pktlen:%d\n", 141 iphlen, pkt_len); 142 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 143 /* No multi-cast support in SCTP */ 144 goto bad; 145 } 146 /* destination port of 0 is illegal, based on RFC2960. */ 147 if (sh->dest_port == 0) 148 goto bad; 149 150 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 151 "sctp_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", 152 m->m_pkthdr.len, 153 if_name(m->m_pkthdr.rcvif), 154 m->m_pkthdr.csum_flags); 155 #if defined(SCTP_WITH_NO_CSUM) 156 SCTP_STAT_INCR(sctps_recvnocrc); 157 #else 158 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 159 SCTP_STAT_INCR(sctps_recvhwcrc); 160 goto sctp_skip_csum; 161 } 162 check = sh->checksum; /* save incoming checksum */ 163 sh->checksum = 0; /* prepare for calc */ 164 calc_check = sctp_calculate_cksum(m, iphlen); 165 SCTP_STAT_INCR(sctps_recvswcrc); 166 if (calc_check != check) { 167 SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p phlen:%d\n", 168 calc_check, check, m, iphlen); 169 stcb = sctp_findassociation_addr(m, offset - sizeof(*ch), 170 sh, ch, &in6p, &net, vrf_id); 171 if ((net) && (port)) { 172 if (net->port == 0) { 173 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); 174 } 175 net->port = port; 176 } 177 if ((net != NULL) && (use_mflowid != 0)) { 178 net->flowid = mflowid; 179 #ifdef INVARIANTS 180 net->flowidset = 1; 181 #endif 182 } 183 /* in6p's ref-count increased && stcb locked */ 184 if ((in6p) && (stcb)) { 185 sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 186 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED); 187 } else if ((in6p != NULL) && (stcb == NULL)) { 188 refcount_up = 1; 189 } 190 SCTP_STAT_INCR(sctps_badsum); 191 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 192 goto bad; 193 } 194 sh->checksum = calc_check; 195 196 sctp_skip_csum: 197 #endif 198 net = NULL; 199 /* 200 * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 201 * IP/SCTP/first chunk header... 202 */ 203 stcb = sctp_findassociation_addr(m, offset - sizeof(*ch), 204 sh, ch, &in6p, &net, vrf_id); 205 if ((net) && (port)) { 206 if (net->port == 0) { 207 sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr)); 208 } 209 net->port = port; 210 } 211 if ((net != NULL) && (use_mflowid != 0)) { 212 net->flowid = mflowid; 213 #ifdef INVARIANTS 214 net->flowidset = 1; 215 #endif 216 } 217 /* in6p's ref-count increased */ 218 if (in6p == NULL) { 219 struct sctp_init_chunk *init_chk, chunk_buf; 220 221 SCTP_STAT_INCR(sctps_noport); 222 if (ch->chunk_type == SCTP_INITIATION) { 223 /* 224 * we do a trick here to get the INIT tag, dig in 225 * and get the tag from the INIT and put it in the 226 * common header. 227 */ 228 init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 229 iphlen + sizeof(*sh), sizeof(*init_chk), 230 (uint8_t *) & chunk_buf); 231 if (init_chk) 232 sh->v_tag = init_chk->init.initiate_tag; 233 else 234 sh->v_tag = 0; 235 } 236 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 237 sctp_send_shutdown_complete2(m, sh, 238 use_mflowid, mflowid, 239 vrf_id, port); 240 goto bad; 241 } 242 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 243 goto bad; 244 } 245 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) { 246 if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) || 247 ((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) && 248 (ch->chunk_type != SCTP_INIT))) { 249 sctp_send_abort(m, iphlen, sh, 0, NULL, 250 use_mflowid, mflowid, 251 vrf_id, port); 252 } 253 } 254 goto bad; 255 } else if (stcb == NULL) { 256 refcount_up = 1; 257 } 258 #ifdef IPSEC 259 /* 260 * Check AH/ESP integrity. 261 */ 262 in6p_ip = (struct inpcb *)in6p; 263 if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { 264 /* XXX */ 265 MODULE_GLOBAL(ipsec6stat).in_polvio++; 266 goto bad; 267 } 268 #endif /* IPSEC */ 269 270 /* 271 * CONTROL chunk processing 272 */ 273 offset -= sizeof(*ch); 274 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 275 276 /* Length now holds the total packet length payload + iphlen */ 277 length = ntohs(ip6->ip6_plen) + iphlen; 278 279 /* sa_ignore NO_NULL_CHK */ 280 sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 281 in6p, stcb, net, ecn_bits, 282 use_mflowid, mflowid, 283 vrf_id, port); 284 /* inp's ref-count reduced && stcb unlocked */ 285 /* XXX this stuff below gets moved to appropriate parts later... */ 286 if (m) 287 sctp_m_freem(m); 288 if ((in6p) && refcount_up) { 289 /* reduce ref-count */ 290 SCTP_INP_WLOCK(in6p); 291 SCTP_INP_DECR_REF(in6p); 292 SCTP_INP_WUNLOCK(in6p); 293 } 294 return (IPPROTO_DONE); 295 296 bad: 297 if (stcb) { 298 SCTP_TCB_UNLOCK(stcb); 299 } 300 if ((in6p) && refcount_up) { 301 /* reduce ref-count */ 302 SCTP_INP_WLOCK(in6p); 303 SCTP_INP_DECR_REF(in6p); 304 SCTP_INP_WUNLOCK(in6p); 305 } 306 if (m) 307 sctp_m_freem(m); 308 return (IPPROTO_DONE); 309 } 310 311 312 static void 313 sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 314 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 315 { 316 uint32_t nxtsz; 317 318 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 319 (icmp6 == NULL) || (sh == NULL)) { 320 goto out; 321 } 322 /* First do we even look at it? */ 323 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 324 goto out; 325 326 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 327 /* not PACKET TO BIG */ 328 goto out; 329 } 330 /* 331 * ok we need to look closely. We could even get smarter and look at 332 * anyone that we sent to in case we get a different ICMP that tells 333 * us there is no way to reach a host, but for this impl, all we 334 * care about is MTU discovery. 335 */ 336 nxtsz = ntohl(icmp6->icmp6_mtu); 337 /* Stop any PMTU timer */ 338 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 339 340 /* Adjust destination size limit */ 341 if (net->mtu > nxtsz) { 342 net->mtu = nxtsz; 343 if (net->port) { 344 net->mtu -= sizeof(struct udphdr); 345 } 346 } 347 /* now what about the ep? */ 348 if (stcb->asoc.smallest_mtu > nxtsz) { 349 struct sctp_tmit_chunk *chk; 350 351 /* Adjust that too */ 352 stcb->asoc.smallest_mtu = nxtsz; 353 /* now off to subtract IP_DF flag if needed */ 354 355 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 356 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 357 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 358 } 359 } 360 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 361 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 362 /* 363 * For this guy we also mark for immediate 364 * resend since we sent to big of chunk 365 */ 366 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 367 if (chk->sent != SCTP_DATAGRAM_RESEND) 368 stcb->asoc.sent_queue_retran_cnt++; 369 chk->sent = SCTP_DATAGRAM_RESEND; 370 chk->rec.data.doing_fast_retransmit = 0; 371 372 chk->sent = SCTP_DATAGRAM_RESEND; 373 /* Clear any time so NO RTT is being done */ 374 chk->sent_rcv_time.tv_sec = 0; 375 chk->sent_rcv_time.tv_usec = 0; 376 stcb->asoc.total_flight -= chk->send_size; 377 net->flight_size -= chk->send_size; 378 } 379 } 380 } 381 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 382 out: 383 if (stcb) { 384 SCTP_TCB_UNLOCK(stcb); 385 } 386 } 387 388 389 void 390 sctp6_notify(struct sctp_inpcb *inp, 391 struct icmp6_hdr *icmph, 392 struct sctphdr *sh, 393 struct sockaddr *to, 394 struct sctp_tcb *stcb, 395 struct sctp_nets *net) 396 { 397 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 398 struct socket *so; 399 400 #endif 401 402 /* protection */ 403 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 404 (sh == NULL) || (to == NULL)) { 405 if (stcb) 406 SCTP_TCB_UNLOCK(stcb); 407 return; 408 } 409 /* First job is to verify the vtag matches what I would send */ 410 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 411 SCTP_TCB_UNLOCK(stcb); 412 return; 413 } 414 if (icmph->icmp6_type != ICMP_UNREACH) { 415 /* We only care about unreachable */ 416 SCTP_TCB_UNLOCK(stcb); 417 return; 418 } 419 if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 420 (icmph->icmp6_code == ICMP_UNREACH_HOST) || 421 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 422 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 423 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 424 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 425 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 426 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 427 428 /* 429 * Hmm reachablity problems we must examine closely. If its 430 * not reachable, we may have lost a network. Or if there is 431 * NO protocol at the other end named SCTP. well we consider 432 * it a OOTB abort. 433 */ 434 if (net->dest_state & SCTP_ADDR_REACHABLE) { 435 /* Ok that destination is NOT reachable */ 436 net->dest_state &= ~SCTP_ADDR_REACHABLE; 437 net->dest_state &= ~SCTP_ADDR_PF; 438 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 439 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 440 } 441 SCTP_TCB_UNLOCK(stcb); 442 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 443 (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 444 /* 445 * Here the peer is either playing tricks on us, including 446 * an address that belongs to someone who does not support 447 * SCTP OR was a userland implementation that shutdown and 448 * now is dead. In either case treat it like a OOTB abort 449 * with no TCB 450 */ 451 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 452 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 453 so = SCTP_INP_SO(inp); 454 atomic_add_int(&stcb->asoc.refcnt, 1); 455 SCTP_TCB_UNLOCK(stcb); 456 SCTP_SOCKET_LOCK(so, 1); 457 SCTP_TCB_LOCK(stcb); 458 atomic_subtract_int(&stcb->asoc.refcnt, 1); 459 #endif 460 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 461 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 462 SCTP_SOCKET_UNLOCK(so, 1); 463 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 464 #endif 465 /* no need to unlock here, since the TCB is gone */ 466 } else { 467 SCTP_TCB_UNLOCK(stcb); 468 } 469 } 470 471 472 473 void 474 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 475 { 476 struct sctphdr sh; 477 struct ip6ctlparam *ip6cp = NULL; 478 uint32_t vrf_id; 479 480 vrf_id = SCTP_DEFAULT_VRFID; 481 482 if (pktdst->sa_family != AF_INET6 || 483 pktdst->sa_len != sizeof(struct sockaddr_in6)) 484 return; 485 486 if ((unsigned)cmd >= PRC_NCMDS) 487 return; 488 if (PRC_IS_REDIRECT(cmd)) { 489 d = NULL; 490 } else if (inet6ctlerrmap[cmd] == 0) { 491 return; 492 } 493 /* if the parameter is from icmp6, decode it. */ 494 if (d != NULL) { 495 ip6cp = (struct ip6ctlparam *)d; 496 } else { 497 ip6cp = (struct ip6ctlparam *)NULL; 498 } 499 500 if (ip6cp) { 501 /* 502 * XXX: We assume that when IPV6 is non NULL, M and OFF are 503 * valid. 504 */ 505 /* check if we can safely examine src and dst ports */ 506 struct sctp_inpcb *inp = NULL; 507 struct sctp_tcb *stcb = NULL; 508 struct sctp_nets *net = NULL; 509 struct sockaddr_in6 final; 510 511 if (ip6cp->ip6c_m == NULL) 512 return; 513 514 bzero(&sh, sizeof(sh)); 515 bzero(&final, sizeof(final)); 516 inp = NULL; 517 net = NULL; 518 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 519 (caddr_t)&sh); 520 ip6cp->ip6c_src->sin6_port = sh.src_port; 521 final.sin6_len = sizeof(final); 522 final.sin6_family = AF_INET6; 523 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 524 final.sin6_port = sh.dest_port; 525 stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 526 (struct sockaddr *)&final, 527 &inp, &net, 1, vrf_id); 528 /* inp's ref-count increased && stcb locked */ 529 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 530 if (cmd == PRC_MSGSIZE) { 531 sctp6_notify_mbuf(inp, 532 ip6cp->ip6c_icmp6, 533 &sh, 534 stcb, 535 net); 536 /* inp's ref-count reduced && stcb unlocked */ 537 } else { 538 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 539 (struct sockaddr *)&final, 540 stcb, net); 541 /* inp's ref-count reduced && stcb unlocked */ 542 } 543 } else { 544 if (PRC_IS_REDIRECT(cmd) && inp) { 545 in6_rtchange((struct in6pcb *)inp, 546 inet6ctlerrmap[cmd]); 547 } 548 if (inp) { 549 /* reduce inp's ref-count */ 550 SCTP_INP_WLOCK(inp); 551 SCTP_INP_DECR_REF(inp); 552 SCTP_INP_WUNLOCK(inp); 553 } 554 if (stcb) 555 SCTP_TCB_UNLOCK(stcb); 556 } 557 } 558 } 559 560 /* 561 * this routine can probably be collasped into the one in sctp_userreq.c 562 * since they do the same thing and now we lookup with a sockaddr 563 */ 564 static int 565 sctp6_getcred(SYSCTL_HANDLER_ARGS) 566 { 567 struct xucred xuc; 568 struct sockaddr_in6 addrs[2]; 569 struct sctp_inpcb *inp; 570 struct sctp_nets *net; 571 struct sctp_tcb *stcb; 572 int error; 573 uint32_t vrf_id; 574 575 vrf_id = SCTP_DEFAULT_VRFID; 576 577 error = priv_check(req->td, PRIV_NETINET_GETCRED); 578 if (error) 579 return (error); 580 581 if (req->newlen != sizeof(addrs)) { 582 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 583 return (EINVAL); 584 } 585 if (req->oldlen != sizeof(struct ucred)) { 586 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 587 return (EINVAL); 588 } 589 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 590 if (error) 591 return (error); 592 593 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 594 sin6tosa(&addrs[1]), 595 &inp, &net, 1, vrf_id); 596 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 597 if ((inp != NULL) && (stcb == NULL)) { 598 /* reduce ref-count */ 599 SCTP_INP_WLOCK(inp); 600 SCTP_INP_DECR_REF(inp); 601 goto cred_can_cont; 602 } 603 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 604 error = ENOENT; 605 goto out; 606 } 607 SCTP_TCB_UNLOCK(stcb); 608 /* 609 * We use the write lock here, only since in the error leg we need 610 * it. If we used RLOCK, then we would have to 611 * wlock/decr/unlock/rlock. Which in theory could create a hole. 612 * Better to use higher wlock. 613 */ 614 SCTP_INP_WLOCK(inp); 615 cred_can_cont: 616 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 617 if (error) { 618 SCTP_INP_WUNLOCK(inp); 619 goto out; 620 } 621 cru2x(inp->sctp_socket->so_cred, &xuc); 622 SCTP_INP_WUNLOCK(inp); 623 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 624 out: 625 return (error); 626 } 627 628 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 629 0, 0, 630 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 631 632 633 /* This is the same as the sctp_abort() could be made common */ 634 static void 635 sctp6_abort(struct socket *so) 636 { 637 struct sctp_inpcb *inp; 638 uint32_t flags; 639 640 inp = (struct sctp_inpcb *)so->so_pcb; 641 if (inp == NULL) { 642 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 643 return; 644 } 645 sctp_must_try_again: 646 flags = inp->sctp_flags; 647 #ifdef SCTP_LOG_CLOSING 648 sctp_log_closing(inp, NULL, 17); 649 #endif 650 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 651 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 652 #ifdef SCTP_LOG_CLOSING 653 sctp_log_closing(inp, NULL, 16); 654 #endif 655 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 656 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 657 SOCK_LOCK(so); 658 SCTP_SB_CLEAR(so->so_snd); 659 /* 660 * same for the rcv ones, they are only here for the 661 * accounting/select. 662 */ 663 SCTP_SB_CLEAR(so->so_rcv); 664 /* Now null out the reference, we are completely detached. */ 665 so->so_pcb = NULL; 666 SOCK_UNLOCK(so); 667 } else { 668 flags = inp->sctp_flags; 669 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 670 goto sctp_must_try_again; 671 } 672 } 673 return; 674 } 675 676 static int 677 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 678 { 679 struct in6pcb *inp6; 680 int error; 681 struct sctp_inpcb *inp; 682 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 683 684 inp = (struct sctp_inpcb *)so->so_pcb; 685 if (inp != NULL) { 686 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 687 return (EINVAL); 688 } 689 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 690 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 691 if (error) 692 return (error); 693 } 694 error = sctp_inpcb_alloc(so, vrf_id); 695 if (error) 696 return (error); 697 inp = (struct sctp_inpcb *)so->so_pcb; 698 SCTP_INP_WLOCK(inp); 699 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 700 inp6 = (struct in6pcb *)inp; 701 702 inp6->inp_vflag |= INP_IPV6; 703 inp6->in6p_hops = -1; /* use kernel default */ 704 inp6->in6p_cksum = -1; /* just to be sure */ 705 #ifdef INET 706 /* 707 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 708 * socket as well, because the socket may be bound to an IPv6 709 * wildcard address, which may match an IPv4-mapped IPv6 address. 710 */ 711 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 712 #endif 713 /* 714 * Hmm what about the IPSEC stuff that is missing here but in 715 * sctp_attach()? 716 */ 717 SCTP_INP_WUNLOCK(inp); 718 return (0); 719 } 720 721 static int 722 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 723 { 724 struct sctp_inpcb *inp; 725 struct in6pcb *inp6; 726 int error; 727 728 inp = (struct sctp_inpcb *)so->so_pcb; 729 if (inp == NULL) { 730 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 731 return (EINVAL); 732 } 733 if (addr) { 734 switch (addr->sa_family) { 735 #ifdef INET 736 case AF_INET: 737 if (addr->sa_len != sizeof(struct sockaddr_in)) { 738 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 739 return (EINVAL); 740 } 741 break; 742 #endif 743 #ifdef INET6 744 case AF_INET6: 745 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 746 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 747 return (EINVAL); 748 } 749 break; 750 #endif 751 default: 752 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 753 return (EINVAL); 754 } 755 } 756 inp6 = (struct in6pcb *)inp; 757 inp6->inp_vflag &= ~INP_IPV4; 758 inp6->inp_vflag |= INP_IPV6; 759 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 760 switch (addr->sa_family) { 761 #ifdef INET 762 case AF_INET: 763 /* binding v4 addr to v6 socket, so reset flags */ 764 inp6->inp_vflag |= INP_IPV4; 765 inp6->inp_vflag &= ~INP_IPV6; 766 break; 767 #endif 768 #ifdef INET6 769 case AF_INET6: 770 { 771 struct sockaddr_in6 *sin6_p; 772 773 sin6_p = (struct sockaddr_in6 *)addr; 774 775 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 776 inp6->inp_vflag |= INP_IPV4; 777 } 778 #ifdef INET 779 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 780 struct sockaddr_in sin; 781 782 in6_sin6_2_sin(&sin, sin6_p); 783 inp6->inp_vflag |= INP_IPV4; 784 inp6->inp_vflag &= ~INP_IPV6; 785 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 786 return (error); 787 } 788 #endif 789 break; 790 } 791 #endif 792 default: 793 break; 794 } 795 } else if (addr != NULL) { 796 struct sockaddr_in6 *sin6_p; 797 798 /* IPV6_V6ONLY socket */ 799 #ifdef INET 800 if (addr->sa_family == AF_INET) { 801 /* can't bind v4 addr to v6 only socket! */ 802 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 803 return (EINVAL); 804 } 805 #endif 806 sin6_p = (struct sockaddr_in6 *)addr; 807 808 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 809 /* can't bind v4-mapped addrs either! */ 810 /* NOTE: we don't support SIIT */ 811 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 812 return (EINVAL); 813 } 814 } 815 error = sctp_inpcb_bind(so, addr, NULL, p); 816 return (error); 817 } 818 819 820 static void 821 sctp6_close(struct socket *so) 822 { 823 sctp_close(so); 824 } 825 826 /* This could be made common with sctp_detach() since they are identical */ 827 828 static 829 int 830 sctp6_disconnect(struct socket *so) 831 { 832 return (sctp_disconnect(so)); 833 } 834 835 836 int 837 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 838 struct mbuf *control, struct thread *p); 839 840 841 static int 842 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 843 struct mbuf *control, struct thread *p) 844 { 845 struct sctp_inpcb *inp; 846 struct in6pcb *inp6; 847 848 #ifdef INET 849 struct sockaddr_in6 *sin6; 850 851 #endif /* INET */ 852 /* No SPL needed since sctp_output does this */ 853 854 inp = (struct sctp_inpcb *)so->so_pcb; 855 if (inp == NULL) { 856 if (control) { 857 SCTP_RELEASE_PKT(control); 858 control = NULL; 859 } 860 SCTP_RELEASE_PKT(m); 861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 862 return (EINVAL); 863 } 864 inp6 = (struct in6pcb *)inp; 865 /* 866 * For the TCP model we may get a NULL addr, if we are a connected 867 * socket thats ok. 868 */ 869 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 870 (addr == NULL)) { 871 goto connected_type; 872 } 873 if (addr == NULL) { 874 SCTP_RELEASE_PKT(m); 875 if (control) { 876 SCTP_RELEASE_PKT(control); 877 control = NULL; 878 } 879 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 880 return (EDESTADDRREQ); 881 } 882 #ifdef INET 883 sin6 = (struct sockaddr_in6 *)addr; 884 if (SCTP_IPV6_V6ONLY(inp6)) { 885 /* 886 * if IPV6_V6ONLY flag, we discard datagrams destined to a 887 * v4 addr or v4-mapped addr 888 */ 889 if (addr->sa_family == AF_INET) { 890 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 891 return (EINVAL); 892 } 893 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 894 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 895 return (EINVAL); 896 } 897 } 898 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 899 if (!MODULE_GLOBAL(ip6_v6only)) { 900 struct sockaddr_in sin; 901 902 /* convert v4-mapped into v4 addr and send */ 903 in6_sin6_2_sin(&sin, sin6); 904 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 905 control, p)); 906 } else { 907 /* mapped addresses aren't enabled */ 908 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 909 return (EINVAL); 910 } 911 } 912 #endif /* INET */ 913 connected_type: 914 /* now what about control */ 915 if (control) { 916 if (inp->control) { 917 SCTP_PRINTF("huh? control set?\n"); 918 SCTP_RELEASE_PKT(inp->control); 919 inp->control = NULL; 920 } 921 inp->control = control; 922 } 923 /* Place the data */ 924 if (inp->pkt) { 925 SCTP_BUF_NEXT(inp->pkt_last) = m; 926 inp->pkt_last = m; 927 } else { 928 inp->pkt_last = inp->pkt = m; 929 } 930 if ( 931 /* FreeBSD and MacOSX uses a flag passed */ 932 ((flags & PRUS_MORETOCOME) == 0) 933 ) { 934 /* 935 * note with the current version this code will only be used 936 * by OpenBSD, NetBSD and FreeBSD have methods for 937 * re-defining sosend() to use sctp_sosend(). One can 938 * optionaly switch back to this code (by changing back the 939 * defininitions but this is not advisable. 940 */ 941 int ret; 942 943 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 944 inp->pkt = NULL; 945 inp->control = NULL; 946 return (ret); 947 } else { 948 return (0); 949 } 950 } 951 952 static int 953 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 954 { 955 uint32_t vrf_id; 956 int error = 0; 957 struct sctp_inpcb *inp; 958 struct in6pcb *inp6; 959 struct sctp_tcb *stcb; 960 961 #ifdef INET 962 struct sockaddr_in6 *sin6; 963 struct sockaddr_storage ss; 964 965 #endif 966 967 inp6 = (struct in6pcb *)so->so_pcb; 968 inp = (struct sctp_inpcb *)so->so_pcb; 969 if (inp == NULL) { 970 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 971 return (ECONNRESET); /* I made the same as TCP since we are 972 * not setup? */ 973 } 974 if (addr == NULL) { 975 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 976 return (EINVAL); 977 } 978 switch (addr->sa_family) { 979 #ifdef INET 980 case AF_INET: 981 if (addr->sa_len != sizeof(struct sockaddr_in)) { 982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 983 return (EINVAL); 984 } 985 break; 986 #endif 987 #ifdef INET6 988 case AF_INET6: 989 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 990 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 991 return (EINVAL); 992 } 993 break; 994 #endif 995 default: 996 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 997 return (EINVAL); 998 } 999 1000 vrf_id = inp->def_vrf_id; 1001 SCTP_ASOC_CREATE_LOCK(inp); 1002 SCTP_INP_RLOCK(inp); 1003 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 1004 SCTP_PCB_FLAGS_UNBOUND) { 1005 /* Bind a ephemeral port */ 1006 SCTP_INP_RUNLOCK(inp); 1007 error = sctp6_bind(so, NULL, p); 1008 if (error) { 1009 SCTP_ASOC_CREATE_UNLOCK(inp); 1010 1011 return (error); 1012 } 1013 SCTP_INP_RLOCK(inp); 1014 } 1015 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 1016 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 1017 /* We are already connected AND the TCP model */ 1018 SCTP_INP_RUNLOCK(inp); 1019 SCTP_ASOC_CREATE_UNLOCK(inp); 1020 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 1021 return (EADDRINUSE); 1022 } 1023 #ifdef INET 1024 sin6 = (struct sockaddr_in6 *)addr; 1025 if (SCTP_IPV6_V6ONLY(inp6)) { 1026 /* 1027 * if IPV6_V6ONLY flag, ignore connections destined to a v4 1028 * addr or v4-mapped addr 1029 */ 1030 if (addr->sa_family == AF_INET) { 1031 SCTP_INP_RUNLOCK(inp); 1032 SCTP_ASOC_CREATE_UNLOCK(inp); 1033 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1034 return (EINVAL); 1035 } 1036 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1037 SCTP_INP_RUNLOCK(inp); 1038 SCTP_ASOC_CREATE_UNLOCK(inp); 1039 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1040 return (EINVAL); 1041 } 1042 } 1043 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1044 if (!MODULE_GLOBAL(ip6_v6only)) { 1045 /* convert v4-mapped into v4 addr */ 1046 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 1047 addr = (struct sockaddr *)&ss; 1048 } else { 1049 /* mapped addresses aren't enabled */ 1050 SCTP_INP_RUNLOCK(inp); 1051 SCTP_ASOC_CREATE_UNLOCK(inp); 1052 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1053 return (EINVAL); 1054 } 1055 } 1056 #endif /* INET */ 1057 /* Now do we connect? */ 1058 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1059 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1060 if (stcb) { 1061 SCTP_TCB_UNLOCK(stcb); 1062 } 1063 SCTP_INP_RUNLOCK(inp); 1064 } else { 1065 SCTP_INP_RUNLOCK(inp); 1066 SCTP_INP_WLOCK(inp); 1067 SCTP_INP_INCR_REF(inp); 1068 SCTP_INP_WUNLOCK(inp); 1069 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 1070 if (stcb == NULL) { 1071 SCTP_INP_WLOCK(inp); 1072 SCTP_INP_DECR_REF(inp); 1073 SCTP_INP_WUNLOCK(inp); 1074 } 1075 } 1076 1077 if (stcb != NULL) { 1078 /* Already have or am bring up an association */ 1079 SCTP_ASOC_CREATE_UNLOCK(inp); 1080 SCTP_TCB_UNLOCK(stcb); 1081 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 1082 return (EALREADY); 1083 } 1084 /* We are GOOD to go */ 1085 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 1086 SCTP_ASOC_CREATE_UNLOCK(inp); 1087 if (stcb == NULL) { 1088 /* Gak! no memory */ 1089 return (error); 1090 } 1091 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1092 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1093 /* Set the connected flag so we can queue data */ 1094 soisconnecting(so); 1095 } 1096 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1097 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1098 1099 /* initialize authentication parameters for the assoc */ 1100 sctp_initialize_auth_params(inp, stcb); 1101 1102 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 1103 SCTP_TCB_UNLOCK(stcb); 1104 return (error); 1105 } 1106 1107 static int 1108 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 1109 { 1110 struct sockaddr_in6 *sin6; 1111 struct sctp_inpcb *inp; 1112 uint32_t vrf_id; 1113 struct sctp_ifa *sctp_ifa; 1114 1115 int error; 1116 1117 /* 1118 * Do the malloc first in case it blocks. 1119 */ 1120 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 1121 if (sin6 == NULL) 1122 return (ENOMEM); 1123 sin6->sin6_family = AF_INET6; 1124 sin6->sin6_len = sizeof(*sin6); 1125 1126 inp = (struct sctp_inpcb *)so->so_pcb; 1127 if (inp == NULL) { 1128 SCTP_FREE_SONAME(sin6); 1129 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1130 return (ECONNRESET); 1131 } 1132 SCTP_INP_RLOCK(inp); 1133 sin6->sin6_port = inp->sctp_lport; 1134 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1135 /* For the bound all case you get back 0 */ 1136 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1137 struct sctp_tcb *stcb; 1138 struct sockaddr_in6 *sin_a6; 1139 struct sctp_nets *net; 1140 int fnd; 1141 1142 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1143 if (stcb == NULL) { 1144 goto notConn6; 1145 } 1146 fnd = 0; 1147 sin_a6 = NULL; 1148 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1149 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1150 if (sin_a6 == NULL) 1151 /* this will make coverity happy */ 1152 continue; 1153 1154 if (sin_a6->sin6_family == AF_INET6) { 1155 fnd = 1; 1156 break; 1157 } 1158 } 1159 if ((!fnd) || (sin_a6 == NULL)) { 1160 /* punt */ 1161 goto notConn6; 1162 } 1163 vrf_id = inp->def_vrf_id; 1164 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1165 if (sctp_ifa) { 1166 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1167 } 1168 } else { 1169 /* For the bound all case you get back 0 */ 1170 notConn6: 1171 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1172 } 1173 } else { 1174 /* Take the first IPv6 address in the list */ 1175 struct sctp_laddr *laddr; 1176 int fnd = 0; 1177 1178 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1179 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1180 struct sockaddr_in6 *sin_a; 1181 1182 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1183 sin6->sin6_addr = sin_a->sin6_addr; 1184 fnd = 1; 1185 break; 1186 } 1187 } 1188 if (!fnd) { 1189 SCTP_FREE_SONAME(sin6); 1190 SCTP_INP_RUNLOCK(inp); 1191 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1192 return (ENOENT); 1193 } 1194 } 1195 SCTP_INP_RUNLOCK(inp); 1196 /* Scoping things for v6 */ 1197 if ((error = sa6_recoverscope(sin6)) != 0) { 1198 SCTP_FREE_SONAME(sin6); 1199 return (error); 1200 } 1201 (*addr) = (struct sockaddr *)sin6; 1202 return (0); 1203 } 1204 1205 static int 1206 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1207 { 1208 struct sockaddr_in6 *sin6; 1209 int fnd; 1210 struct sockaddr_in6 *sin_a6; 1211 struct sctp_inpcb *inp; 1212 struct sctp_tcb *stcb; 1213 struct sctp_nets *net; 1214 int error; 1215 1216 /* Do the malloc first in case it blocks. */ 1217 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1218 if (sin6 == NULL) 1219 return (ENOMEM); 1220 sin6->sin6_family = AF_INET6; 1221 sin6->sin6_len = sizeof(*sin6); 1222 1223 inp = (struct sctp_inpcb *)so->so_pcb; 1224 if ((inp == NULL) || 1225 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1226 /* UDP type and listeners will drop out here */ 1227 SCTP_FREE_SONAME(sin6); 1228 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1229 return (ENOTCONN); 1230 } 1231 SCTP_INP_RLOCK(inp); 1232 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1233 if (stcb) { 1234 SCTP_TCB_LOCK(stcb); 1235 } 1236 SCTP_INP_RUNLOCK(inp); 1237 if (stcb == NULL) { 1238 SCTP_FREE_SONAME(sin6); 1239 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1240 return (ECONNRESET); 1241 } 1242 fnd = 0; 1243 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1244 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1245 if (sin_a6->sin6_family == AF_INET6) { 1246 fnd = 1; 1247 sin6->sin6_port = stcb->rport; 1248 sin6->sin6_addr = sin_a6->sin6_addr; 1249 break; 1250 } 1251 } 1252 SCTP_TCB_UNLOCK(stcb); 1253 if (!fnd) { 1254 /* No IPv4 address */ 1255 SCTP_FREE_SONAME(sin6); 1256 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1257 return (ENOENT); 1258 } 1259 if ((error = sa6_recoverscope(sin6)) != 0) 1260 return (error); 1261 *addr = (struct sockaddr *)sin6; 1262 return (0); 1263 } 1264 1265 static int 1266 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1267 { 1268 #ifdef INET 1269 struct sockaddr *addr; 1270 1271 #endif 1272 struct in6pcb *inp6 = sotoin6pcb(so); 1273 int error; 1274 1275 if (inp6 == NULL) { 1276 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1277 return (EINVAL); 1278 } 1279 /* allow v6 addresses precedence */ 1280 error = sctp6_getaddr(so, nam); 1281 #ifdef INET 1282 if (error) { 1283 /* try v4 next if v6 failed */ 1284 error = sctp_ingetaddr(so, nam); 1285 if (error) { 1286 return (error); 1287 } 1288 addr = *nam; 1289 /* if I'm V6ONLY, convert it to v4-mapped */ 1290 if (SCTP_IPV6_V6ONLY(inp6)) { 1291 struct sockaddr_in6 sin6; 1292 1293 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1294 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1295 } 1296 } 1297 #endif 1298 return (error); 1299 } 1300 1301 1302 static int 1303 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1304 { 1305 #ifdef INET 1306 struct sockaddr *addr; 1307 1308 #endif 1309 struct in6pcb *inp6 = sotoin6pcb(so); 1310 int error; 1311 1312 if (inp6 == NULL) { 1313 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1314 return (EINVAL); 1315 } 1316 /* allow v6 addresses precedence */ 1317 error = sctp6_peeraddr(so, nam); 1318 #ifdef INET 1319 if (error) { 1320 /* try v4 next if v6 failed */ 1321 error = sctp_peeraddr(so, nam); 1322 if (error) { 1323 return (error); 1324 } 1325 addr = *nam; 1326 /* if I'm V6ONLY, convert it to v4-mapped */ 1327 if (SCTP_IPV6_V6ONLY(inp6)) { 1328 struct sockaddr_in6 sin6; 1329 1330 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1331 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1332 } 1333 } 1334 #endif 1335 return (error); 1336 } 1337 1338 struct pr_usrreqs sctp6_usrreqs = { 1339 .pru_abort = sctp6_abort, 1340 .pru_accept = sctp_accept, 1341 .pru_attach = sctp6_attach, 1342 .pru_bind = sctp6_bind, 1343 .pru_connect = sctp6_connect, 1344 .pru_control = in6_control, 1345 .pru_close = sctp6_close, 1346 .pru_detach = sctp6_close, 1347 .pru_sopoll = sopoll_generic, 1348 .pru_flush = sctp_flush, 1349 .pru_disconnect = sctp6_disconnect, 1350 .pru_listen = sctp_listen, 1351 .pru_peeraddr = sctp6_getpeeraddr, 1352 .pru_send = sctp6_send, 1353 .pru_shutdown = sctp_shutdown, 1354 .pru_sockaddr = sctp6_in6getaddr, 1355 .pru_sosend = sctp_sosend, 1356 .pru_soreceive = sctp_soreceive 1357 }; 1358 1359 #endif
Cache object: f4814cba84e957d4eefe6628ba98d755
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