sctp6_usrreq.c revision 338985
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: stable/10/sys/netinet6/sctp6_usrreq.c 338985 2018-09-27 18:48:50Z gordon $"); 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#include <netinet6/sctp6_var.h> 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#include <netinet/sctp_crc32.h> 55#include <netinet/icmp6.h> 56#include <netinet/udp.h> 57 58#ifdef IPSEC 59#include <netipsec/ipsec.h> 60#include <netipsec/ipsec6.h> 61#endif /* IPSEC */ 62 63extern struct protosw inetsw[]; 64 65int 66sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 67{ 68 struct mbuf *m; 69 int iphlen; 70 uint32_t vrf_id; 71 uint8_t ecn_bits; 72 struct sockaddr_in6 src, dst; 73 struct ip6_hdr *ip6; 74 struct sctphdr *sh; 75 struct sctp_chunkhdr *ch; 76 int length, offset; 77 78#if !defined(SCTP_WITH_NO_CSUM) 79 uint8_t compute_crc; 80 81#endif 82 uint32_t mflowid; 83 uint8_t mflowtype; 84 uint16_t fibnum; 85 86 iphlen = *offp; 87 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 88 SCTP_RELEASE_PKT(*i_pak); 89 return (IPPROTO_DONE); 90 } 91 m = SCTP_HEADER_TO_CHAIN(*i_pak); 92#ifdef SCTP_MBUF_LOGGING 93 /* Log in any input mbufs */ 94 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 95 sctp_log_mbc(m, SCTP_MBUF_INPUT); 96 } 97#endif 98#ifdef SCTP_PACKET_LOGGING 99 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 100 sctp_packet_log(m); 101 } 102#endif 103 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 104 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 105 m->m_pkthdr.len, 106 if_name(m->m_pkthdr.rcvif), 107 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 108 mflowid = m->m_pkthdr.flowid; 109 mflowtype = M_HASHTYPE_GET(m); 110 fibnum = M_GETFIB(m); 111 SCTP_STAT_INCR(sctps_recvpackets); 112 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 113 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 114 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 115 ip6 = mtod(m, struct ip6_hdr *); 116 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 117 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 118 if (sh == NULL) { 119 SCTP_STAT_INCR(sctps_hdrops); 120 return (IPPROTO_DONE); 121 } 122 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 123 offset -= sizeof(struct sctp_chunkhdr); 124 memset(&src, 0, sizeof(struct sockaddr_in6)); 125 src.sin6_family = AF_INET6; 126 src.sin6_len = sizeof(struct sockaddr_in6); 127 src.sin6_port = sh->src_port; 128 src.sin6_addr = ip6->ip6_src; 129 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 130 goto out; 131 } 132 memset(&dst, 0, sizeof(struct sockaddr_in6)); 133 dst.sin6_family = AF_INET6; 134 dst.sin6_len = sizeof(struct sockaddr_in6); 135 dst.sin6_port = sh->dest_port; 136 dst.sin6_addr = ip6->ip6_dst; 137 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 138 goto out; 139 } 140 if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) { 141 /* XXX send icmp6 host/port unreach? */ 142 goto out; 143 } 144 length = ntohs(ip6->ip6_plen) + iphlen; 145 /* Validate mbuf chain length with IP payload length. */ 146 if (SCTP_HEADER_LEN(m) != length) { 147 SCTPDBG(SCTP_DEBUG_INPUT1, 148 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 149 SCTP_STAT_INCR(sctps_hdrops); 150 goto out; 151 } 152 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 153 goto out; 154 } 155 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 156#if defined(SCTP_WITH_NO_CSUM) 157 SCTP_STAT_INCR(sctps_recvnocrc); 158#else 159 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 160 SCTP_STAT_INCR(sctps_recvhwcrc); 161 compute_crc = 0; 162 } else { 163 SCTP_STAT_INCR(sctps_recvswcrc); 164 compute_crc = 1; 165 } 166#endif 167 sctp_common_input_processing(&m, iphlen, offset, length, 168 (struct sockaddr *)&src, 169 (struct sockaddr *)&dst, 170 sh, ch, 171#if !defined(SCTP_WITH_NO_CSUM) 172 compute_crc, 173#endif 174 ecn_bits, 175 mflowtype, mflowid, fibnum, 176 vrf_id, port); 177out: 178 if (m) { 179 sctp_m_freem(m); 180 } 181 return (IPPROTO_DONE); 182} 183 184 185int 186sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 187{ 188 return (sctp6_input_with_port(i_pak, offp, 0)); 189} 190 191static void 192sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 193 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 194{ 195 uint32_t nxtsz; 196 197 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 198 (icmp6 == NULL) || (sh == NULL)) { 199 goto out; 200 } 201 /* First do we even look at it? */ 202 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 203 goto out; 204 205 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 206 /* not PACKET TO BIG */ 207 goto out; 208 } 209 /* 210 * ok we need to look closely. We could even get smarter and look at 211 * anyone that we sent to in case we get a different ICMP that tells 212 * us there is no way to reach a host, but for this impl, all we 213 * care about is MTU discovery. 214 */ 215 nxtsz = ntohl(icmp6->icmp6_mtu); 216 /* Stop any PMTU timer */ 217 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, 218 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 219 220 /* Adjust destination size limit */ 221 if (net->mtu > nxtsz) { 222 net->mtu = nxtsz; 223 if (net->port) { 224 net->mtu -= sizeof(struct udphdr); 225 } 226 } 227 /* now what about the ep? */ 228 if (stcb->asoc.smallest_mtu > nxtsz) { 229 struct sctp_tmit_chunk *chk; 230 231 /* Adjust that too */ 232 stcb->asoc.smallest_mtu = nxtsz; 233 /* now off to subtract IP_DF flag if needed */ 234 235 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 236 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 237 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 238 } 239 } 240 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 241 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 242 /* 243 * For this guy we also mark for immediate 244 * resend since we sent to big of chunk 245 */ 246 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 247 if (chk->sent != SCTP_DATAGRAM_RESEND) 248 stcb->asoc.sent_queue_retran_cnt++; 249 chk->sent = SCTP_DATAGRAM_RESEND; 250 chk->rec.data.doing_fast_retransmit = 0; 251 252 chk->sent = SCTP_DATAGRAM_RESEND; 253 /* Clear any time so NO RTT is being done */ 254 chk->sent_rcv_time.tv_sec = 0; 255 chk->sent_rcv_time.tv_usec = 0; 256 stcb->asoc.total_flight -= chk->send_size; 257 net->flight_size -= chk->send_size; 258 } 259 } 260 } 261 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 262out: 263 if (stcb) { 264 SCTP_TCB_UNLOCK(stcb); 265 } 266} 267 268 269void 270sctp6_notify(struct sctp_inpcb *inp, 271 struct icmp6_hdr *icmph, 272 struct sctphdr *sh, 273 struct sockaddr *to, 274 struct sctp_tcb *stcb, 275 struct sctp_nets *net) 276{ 277#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 278 struct socket *so; 279 280#endif 281 282 /* protection */ 283 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 284 (sh == NULL) || (to == NULL)) { 285 if (stcb) 286 SCTP_TCB_UNLOCK(stcb); 287 return; 288 } 289 /* First job is to verify the vtag matches what I would send */ 290 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 291 SCTP_TCB_UNLOCK(stcb); 292 return; 293 } 294 if (icmph->icmp6_type != ICMP_UNREACH) { 295 /* We only care about unreachable */ 296 SCTP_TCB_UNLOCK(stcb); 297 return; 298 } 299 if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 300 (icmph->icmp6_code == ICMP_UNREACH_HOST) || 301 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 302 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 303 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 304 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 305 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 306 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 307 308 /* 309 * Hmm reachablity problems we must examine closely. If its 310 * not reachable, we may have lost a network. Or if there is 311 * NO protocol at the other end named SCTP. well we consider 312 * it a OOTB abort. 313 */ 314 if (net->dest_state & SCTP_ADDR_REACHABLE) { 315 /* Ok that destination is NOT reachable */ 316 net->dest_state &= ~SCTP_ADDR_REACHABLE; 317 net->dest_state &= ~SCTP_ADDR_PF; 318 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 319 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 320 } 321 SCTP_TCB_UNLOCK(stcb); 322 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 323 (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 324 /* 325 * Here the peer is either playing tricks on us, including 326 * an address that belongs to someone who does not support 327 * SCTP OR was a userland implementation that shutdown and 328 * now is dead. In either case treat it like a OOTB abort 329 * with no TCB 330 */ 331 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 332#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 333 so = SCTP_INP_SO(inp); 334 atomic_add_int(&stcb->asoc.refcnt, 1); 335 SCTP_TCB_UNLOCK(stcb); 336 SCTP_SOCKET_LOCK(so, 1); 337 SCTP_TCB_LOCK(stcb); 338 atomic_subtract_int(&stcb->asoc.refcnt, 1); 339#endif 340 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 341 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 342#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 343 SCTP_SOCKET_UNLOCK(so, 1); 344 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 345#endif 346 /* no need to unlock here, since the TCB is gone */ 347 } else { 348 SCTP_TCB_UNLOCK(stcb); 349 } 350} 351 352 353 354void 355sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 356{ 357 struct sctphdr sh; 358 struct ip6ctlparam *ip6cp = NULL; 359 uint32_t vrf_id; 360 361 vrf_id = SCTP_DEFAULT_VRFID; 362 363 if (pktdst->sa_family != AF_INET6 || 364 pktdst->sa_len != sizeof(struct sockaddr_in6)) 365 return; 366 367 if ((unsigned)cmd >= PRC_NCMDS) 368 return; 369 if (PRC_IS_REDIRECT(cmd)) { 370 d = NULL; 371 } else if (inet6ctlerrmap[cmd] == 0) { 372 return; 373 } 374 /* if the parameter is from icmp6, decode it. */ 375 if (d != NULL) { 376 ip6cp = (struct ip6ctlparam *)d; 377 } else { 378 ip6cp = (struct ip6ctlparam *)NULL; 379 } 380 381 if (ip6cp) { 382 /* 383 * XXX: We assume that when IPV6 is non NULL, M and OFF are 384 * valid. 385 */ 386 struct sctp_inpcb *inp = NULL; 387 struct sctp_tcb *stcb = NULL; 388 struct sctp_nets *net = NULL; 389 struct sockaddr_in6 final; 390 391 if (ip6cp->ip6c_m == NULL) 392 return; 393 394 /* Check if we can safely examine the SCTP header. */ 395 if (ip6cp->ip6c_m->m_pkthdr.len < ip6cp->ip6c_off + sizeof(sh)) 396 return; 397 398 bzero(&sh, sizeof(sh)); 399 bzero(&final, sizeof(final)); 400 inp = NULL; 401 net = NULL; 402 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 403 (caddr_t)&sh); 404 ip6cp->ip6c_src->sin6_port = sh.src_port; 405 final.sin6_len = sizeof(final); 406 final.sin6_family = AF_INET6; 407 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 408 final.sin6_port = sh.dest_port; 409 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 410 (struct sockaddr *)ip6cp->ip6c_src, 411 &inp, &net, 1, vrf_id); 412 /* inp's ref-count increased && stcb locked */ 413 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 414 if (cmd == PRC_MSGSIZE) { 415 sctp6_notify_mbuf(inp, 416 ip6cp->ip6c_icmp6, 417 &sh, 418 stcb, 419 net); 420 /* inp's ref-count reduced && stcb unlocked */ 421 } else { 422 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 423 (struct sockaddr *)&final, 424 stcb, net); 425 /* inp's ref-count reduced && stcb unlocked */ 426 } 427 } else { 428 if (PRC_IS_REDIRECT(cmd) && inp) { 429 in6_rtchange((struct in6pcb *)inp, 430 inet6ctlerrmap[cmd]); 431 } 432 if (inp) { 433 /* reduce inp's ref-count */ 434 SCTP_INP_WLOCK(inp); 435 SCTP_INP_DECR_REF(inp); 436 SCTP_INP_WUNLOCK(inp); 437 } 438 if (stcb) 439 SCTP_TCB_UNLOCK(stcb); 440 } 441 } 442} 443 444/* 445 * this routine can probably be collasped into the one in sctp_userreq.c 446 * since they do the same thing and now we lookup with a sockaddr 447 */ 448static int 449sctp6_getcred(SYSCTL_HANDLER_ARGS) 450{ 451 struct xucred xuc; 452 struct sockaddr_in6 addrs[2]; 453 struct sctp_inpcb *inp; 454 struct sctp_nets *net; 455 struct sctp_tcb *stcb; 456 int error; 457 uint32_t vrf_id; 458 459 vrf_id = SCTP_DEFAULT_VRFID; 460 461 error = priv_check(req->td, PRIV_NETINET_GETCRED); 462 if (error) 463 return (error); 464 465 if (req->newlen != sizeof(addrs)) { 466 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 467 return (EINVAL); 468 } 469 if (req->oldlen != sizeof(struct ucred)) { 470 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 471 return (EINVAL); 472 } 473 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 474 if (error) 475 return (error); 476 477 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 478 sin6tosa(&addrs[0]), 479 &inp, &net, 1, vrf_id); 480 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 481 if ((inp != NULL) && (stcb == NULL)) { 482 /* reduce ref-count */ 483 SCTP_INP_WLOCK(inp); 484 SCTP_INP_DECR_REF(inp); 485 goto cred_can_cont; 486 } 487 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 488 error = ENOENT; 489 goto out; 490 } 491 SCTP_TCB_UNLOCK(stcb); 492 /* 493 * We use the write lock here, only since in the error leg we need 494 * it. If we used RLOCK, then we would have to 495 * wlock/decr/unlock/rlock. Which in theory could create a hole. 496 * Better to use higher wlock. 497 */ 498 SCTP_INP_WLOCK(inp); 499cred_can_cont: 500 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 501 if (error) { 502 SCTP_INP_WUNLOCK(inp); 503 goto out; 504 } 505 cru2x(inp->sctp_socket->so_cred, &xuc); 506 SCTP_INP_WUNLOCK(inp); 507 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 508out: 509 return (error); 510} 511 512SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 513 0, 0, 514 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 515 516 517/* This is the same as the sctp_abort() could be made common */ 518static void 519sctp6_abort(struct socket *so) 520{ 521 struct sctp_inpcb *inp; 522 uint32_t flags; 523 524 inp = (struct sctp_inpcb *)so->so_pcb; 525 if (inp == NULL) { 526 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 527 return; 528 } 529sctp_must_try_again: 530 flags = inp->sctp_flags; 531#ifdef SCTP_LOG_CLOSING 532 sctp_log_closing(inp, NULL, 17); 533#endif 534 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 535 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 536#ifdef SCTP_LOG_CLOSING 537 sctp_log_closing(inp, NULL, 16); 538#endif 539 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 540 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 541 SOCK_LOCK(so); 542 SCTP_SB_CLEAR(so->so_snd); 543 /* 544 * same for the rcv ones, they are only here for the 545 * accounting/select. 546 */ 547 SCTP_SB_CLEAR(so->so_rcv); 548 /* Now null out the reference, we are completely detached. */ 549 so->so_pcb = NULL; 550 SOCK_UNLOCK(so); 551 } else { 552 flags = inp->sctp_flags; 553 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 554 goto sctp_must_try_again; 555 } 556 } 557 return; 558} 559 560static int 561sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 562{ 563 struct in6pcb *inp6; 564 int error; 565 struct sctp_inpcb *inp; 566 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 567 568 inp = (struct sctp_inpcb *)so->so_pcb; 569 if (inp != NULL) { 570 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 571 return (EINVAL); 572 } 573 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 574 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 575 if (error) 576 return (error); 577 } 578 error = sctp_inpcb_alloc(so, vrf_id); 579 if (error) 580 return (error); 581 inp = (struct sctp_inpcb *)so->so_pcb; 582 SCTP_INP_WLOCK(inp); 583 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 584 inp6 = (struct in6pcb *)inp; 585 586 inp6->inp_vflag |= INP_IPV6; 587 inp6->in6p_hops = -1; /* use kernel default */ 588 inp6->in6p_cksum = -1; /* just to be sure */ 589#ifdef INET 590 /* 591 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 592 * socket as well, because the socket may be bound to an IPv6 593 * wildcard address, which may match an IPv4-mapped IPv6 address. 594 */ 595 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 596#endif 597 /* 598 * Hmm what about the IPSEC stuff that is missing here but in 599 * sctp_attach()? 600 */ 601 SCTP_INP_WUNLOCK(inp); 602 return (0); 603} 604 605static int 606sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 607{ 608 struct sctp_inpcb *inp; 609 struct in6pcb *inp6; 610 int error; 611 u_char vflagsav; 612 613 inp = (struct sctp_inpcb *)so->so_pcb; 614 if (inp == NULL) { 615 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 616 return (EINVAL); 617 } 618 if (addr) { 619 switch (addr->sa_family) { 620#ifdef INET 621 case AF_INET: 622 if (addr->sa_len != sizeof(struct sockaddr_in)) { 623 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 624 return (EINVAL); 625 } 626 break; 627#endif 628#ifdef INET6 629 case AF_INET6: 630 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 631 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 632 return (EINVAL); 633 } 634 break; 635#endif 636 default: 637 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 638 return (EINVAL); 639 } 640 } 641 inp6 = (struct in6pcb *)inp; 642 vflagsav = inp6->inp_vflag; 643 inp6->inp_vflag &= ~INP_IPV4; 644 inp6->inp_vflag |= INP_IPV6; 645 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 646 switch (addr->sa_family) { 647#ifdef INET 648 case AF_INET: 649 /* binding v4 addr to v6 socket, so reset flags */ 650 inp6->inp_vflag |= INP_IPV4; 651 inp6->inp_vflag &= ~INP_IPV6; 652 break; 653#endif 654#ifdef INET6 655 case AF_INET6: 656 { 657 struct sockaddr_in6 *sin6_p; 658 659 sin6_p = (struct sockaddr_in6 *)addr; 660 661 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 662 inp6->inp_vflag |= INP_IPV4; 663 } 664#ifdef INET 665 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 666 struct sockaddr_in sin; 667 668 in6_sin6_2_sin(&sin, sin6_p); 669 inp6->inp_vflag |= INP_IPV4; 670 inp6->inp_vflag &= ~INP_IPV6; 671 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 672 goto out; 673 } 674#endif 675 break; 676 } 677#endif 678 default: 679 break; 680 } 681 } else if (addr != NULL) { 682 struct sockaddr_in6 *sin6_p; 683 684 /* IPV6_V6ONLY socket */ 685#ifdef INET 686 if (addr->sa_family == AF_INET) { 687 /* can't bind v4 addr to v6 only socket! */ 688 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 689 error = EINVAL; 690 goto out; 691 } 692#endif 693 sin6_p = (struct sockaddr_in6 *)addr; 694 695 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 696 /* can't bind v4-mapped addrs either! */ 697 /* NOTE: we don't support SIIT */ 698 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 699 error = EINVAL; 700 goto out; 701 } 702 } 703 error = sctp_inpcb_bind(so, addr, NULL, p); 704out: 705 if (error != 0) 706 inp6->inp_vflag = vflagsav; 707 return (error); 708} 709 710 711static void 712sctp6_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 719static 720int 721sctp6_disconnect(struct socket *so) 722{ 723 return (sctp_disconnect(so)); 724} 725 726 727int 728sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 729 struct mbuf *control, struct thread *p); 730 731 732static int 733sctp6_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 */ 797connected_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 836static int 837sctp6_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 union sctp_sockstore store; 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(&store.sin, sin6); 932 addr = &store.sa; 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, inp->sctp_ep.pre_open_stream_count, 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 985static int 986sctp6_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 SCTP_INP_RUNLOCK(inp); 1023 SCTP_FREE_SONAME(sin6); 1024 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1025 return (ENOENT); 1026 } 1027 fnd = 0; 1028 sin_a6 = NULL; 1029 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1030 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1031 if (sin_a6 == NULL) 1032 /* this will make coverity happy */ 1033 continue; 1034 1035 if (sin_a6->sin6_family == AF_INET6) { 1036 fnd = 1; 1037 break; 1038 } 1039 } 1040 if ((!fnd) || (sin_a6 == NULL)) { 1041 /* punt */ 1042 SCTP_INP_RUNLOCK(inp); 1043 SCTP_FREE_SONAME(sin6); 1044 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1045 return (ENOENT); 1046 } 1047 vrf_id = inp->def_vrf_id; 1048 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1049 if (sctp_ifa) { 1050 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1051 } 1052 } else { 1053 /* For the bound all case you get back 0 */ 1054 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1055 } 1056 } else { 1057 /* Take the first IPv6 address in the list */ 1058 struct sctp_laddr *laddr; 1059 int fnd = 0; 1060 1061 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1062 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1063 struct sockaddr_in6 *sin_a; 1064 1065 sin_a = &laddr->ifa->address.sin6; 1066 sin6->sin6_addr = sin_a->sin6_addr; 1067 fnd = 1; 1068 break; 1069 } 1070 } 1071 if (!fnd) { 1072 SCTP_FREE_SONAME(sin6); 1073 SCTP_INP_RUNLOCK(inp); 1074 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1075 return (ENOENT); 1076 } 1077 } 1078 SCTP_INP_RUNLOCK(inp); 1079 /* Scoping things for v6 */ 1080 if ((error = sa6_recoverscope(sin6)) != 0) { 1081 SCTP_FREE_SONAME(sin6); 1082 return (error); 1083 } 1084 (*addr) = (struct sockaddr *)sin6; 1085 return (0); 1086} 1087 1088static int 1089sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1090{ 1091 struct sockaddr_in6 *sin6; 1092 int fnd; 1093 struct sockaddr_in6 *sin_a6; 1094 struct sctp_inpcb *inp; 1095 struct sctp_tcb *stcb; 1096 struct sctp_nets *net; 1097 int error; 1098 1099 /* Do the malloc first in case it blocks. */ 1100 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1101 if (sin6 == NULL) 1102 return (ENOMEM); 1103 sin6->sin6_family = AF_INET6; 1104 sin6->sin6_len = sizeof(*sin6); 1105 1106 inp = (struct sctp_inpcb *)so->so_pcb; 1107 if ((inp == NULL) || 1108 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1109 /* UDP type and listeners will drop out here */ 1110 SCTP_FREE_SONAME(sin6); 1111 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1112 return (ENOTCONN); 1113 } 1114 SCTP_INP_RLOCK(inp); 1115 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1116 if (stcb) { 1117 SCTP_TCB_LOCK(stcb); 1118 } 1119 SCTP_INP_RUNLOCK(inp); 1120 if (stcb == NULL) { 1121 SCTP_FREE_SONAME(sin6); 1122 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1123 return (ECONNRESET); 1124 } 1125 fnd = 0; 1126 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1127 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1128 if (sin_a6->sin6_family == AF_INET6) { 1129 fnd = 1; 1130 sin6->sin6_port = stcb->rport; 1131 sin6->sin6_addr = sin_a6->sin6_addr; 1132 break; 1133 } 1134 } 1135 SCTP_TCB_UNLOCK(stcb); 1136 if (!fnd) { 1137 /* No IPv4 address */ 1138 SCTP_FREE_SONAME(sin6); 1139 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1140 return (ENOENT); 1141 } 1142 if ((error = sa6_recoverscope(sin6)) != 0) { 1143 SCTP_FREE_SONAME(sin6); 1144 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1145 return (error); 1146 } 1147 *addr = (struct sockaddr *)sin6; 1148 return (0); 1149} 1150 1151static int 1152sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1153{ 1154 struct in6pcb *inp6 = sotoin6pcb(so); 1155 int error; 1156 1157 if (inp6 == NULL) { 1158 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1159 return (EINVAL); 1160 } 1161 /* allow v6 addresses precedence */ 1162 error = sctp6_getaddr(so, nam); 1163#ifdef INET 1164 if (error) { 1165 struct sockaddr_in6 *sin6; 1166 1167 /* try v4 next if v6 failed */ 1168 error = sctp_ingetaddr(so, nam); 1169 if (error) { 1170 return (error); 1171 } 1172 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1173 if (sin6 == NULL) { 1174 SCTP_FREE_SONAME(*nam); 1175 return (ENOMEM); 1176 } 1177 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1178 SCTP_FREE_SONAME(*nam); 1179 *nam = (struct sockaddr *)sin6; 1180 } 1181#endif 1182 return (error); 1183} 1184 1185 1186static int 1187sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1188{ 1189 struct in6pcb *inp6 = sotoin6pcb(so); 1190 int error; 1191 1192 if (inp6 == NULL) { 1193 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1194 return (EINVAL); 1195 } 1196 /* allow v6 addresses precedence */ 1197 error = sctp6_peeraddr(so, nam); 1198#ifdef INET 1199 if (error) { 1200 struct sockaddr_in6 *sin6; 1201 1202 /* try v4 next if v6 failed */ 1203 error = sctp_peeraddr(so, nam); 1204 if (error) { 1205 return (error); 1206 } 1207 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1208 if (sin6 == NULL) { 1209 SCTP_FREE_SONAME(*nam); 1210 return (ENOMEM); 1211 } 1212 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1213 SCTP_FREE_SONAME(*nam); 1214 *nam = (struct sockaddr *)sin6; 1215 } 1216#endif 1217 return (error); 1218} 1219 1220struct pr_usrreqs sctp6_usrreqs = { 1221 .pru_abort = sctp6_abort, 1222 .pru_accept = sctp_accept, 1223 .pru_attach = sctp6_attach, 1224 .pru_bind = sctp6_bind, 1225 .pru_connect = sctp6_connect, 1226 .pru_control = in6_control, 1227 .pru_close = sctp6_close, 1228 .pru_detach = sctp6_close, 1229 .pru_sopoll = sopoll_generic, 1230 .pru_flush = sctp_flush, 1231 .pru_disconnect = sctp6_disconnect, 1232 .pru_listen = sctp_listen, 1233 .pru_peeraddr = sctp6_getpeeraddr, 1234 .pru_send = sctp6_send, 1235 .pru_shutdown = sctp_shutdown, 1236 .pru_sockaddr = sctp6_in6getaddr, 1237 .pru_sosend = sctp_sosend, 1238 .pru_soreceive = sctp_soreceive 1239}; 1240 1241#endif 1242