sctp6_usrreq.c revision 275483
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: head/sys/netinet6/sctp6_usrreq.c 275483 2014-12-04 21:17:50Z 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 66extern struct protosw inetsw[]; 67 68int 69sctp6_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 mflowtype; 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 mflowid = m->m_pkthdr.flowid; 117 mflowtype = M_HASHTYPE_GET(m); 118 SCTP_STAT_INCR(sctps_recvpackets); 119 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 120 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 121 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 122 ip6 = mtod(m, struct ip6_hdr *); 123 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 124 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 125 if (sh == NULL) { 126 SCTP_STAT_INCR(sctps_hdrops); 127 return (IPPROTO_DONE); 128 } 129 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 130 offset -= sizeof(struct sctp_chunkhdr); 131 memset(&src, 0, sizeof(struct sockaddr_in6)); 132 src.sin6_family = AF_INET6; 133 src.sin6_len = sizeof(struct sockaddr_in6); 134 src.sin6_port = sh->src_port; 135 src.sin6_addr = ip6->ip6_src; 136 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 137 goto out; 138 } 139 memset(&dst, 0, sizeof(struct sockaddr_in6)); 140 dst.sin6_family = AF_INET6; 141 dst.sin6_len = sizeof(struct sockaddr_in6); 142 dst.sin6_port = sh->dest_port; 143 dst.sin6_addr = ip6->ip6_dst; 144 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 145 goto out; 146 } 147 length = ntohs(ip6->ip6_plen) + iphlen; 148 /* Validate mbuf chain length with IP payload length. */ 149 if (SCTP_HEADER_LEN(m) != length) { 150 SCTPDBG(SCTP_DEBUG_INPUT1, 151 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 152 SCTP_STAT_INCR(sctps_hdrops); 153 goto out; 154 } 155 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 156 goto out; 157 } 158 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 159#if defined(SCTP_WITH_NO_CSUM) 160 SCTP_STAT_INCR(sctps_recvnocrc); 161#else 162 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 163 SCTP_STAT_INCR(sctps_recvhwcrc); 164 compute_crc = 0; 165 } else { 166 SCTP_STAT_INCR(sctps_recvswcrc); 167 compute_crc = 1; 168 } 169#endif 170 sctp_common_input_processing(&m, iphlen, offset, length, 171 (struct sockaddr *)&src, 172 (struct sockaddr *)&dst, 173 sh, ch, 174#if !defined(SCTP_WITH_NO_CSUM) 175 compute_crc, 176#endif 177 ecn_bits, 178 mflowtype, mflowid, 179 vrf_id, port); 180out: 181 if (m) { 182 sctp_m_freem(m); 183 } 184 return (IPPROTO_DONE); 185} 186 187 188int 189sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 190{ 191 return (sctp6_input_with_port(i_pak, offp, 0)); 192} 193 194static void 195sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 196 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 197{ 198 uint32_t nxtsz; 199 200 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 201 (icmp6 == NULL) || (sh == NULL)) { 202 goto out; 203 } 204 /* First do we even look at it? */ 205 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 206 goto out; 207 208 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 209 /* not PACKET TO BIG */ 210 goto out; 211 } 212 /* 213 * ok we need to look closely. We could even get smarter and look at 214 * anyone that we sent to in case we get a different ICMP that tells 215 * us there is no way to reach a host, but for this impl, all we 216 * care about is MTU discovery. 217 */ 218 nxtsz = ntohl(icmp6->icmp6_mtu); 219 /* Stop any PMTU timer */ 220 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 221 222 /* Adjust destination size limit */ 223 if (net->mtu > nxtsz) { 224 net->mtu = nxtsz; 225 if (net->port) { 226 net->mtu -= sizeof(struct udphdr); 227 } 228 } 229 /* now what about the ep? */ 230 if (stcb->asoc.smallest_mtu > nxtsz) { 231 struct sctp_tmit_chunk *chk; 232 233 /* Adjust that too */ 234 stcb->asoc.smallest_mtu = nxtsz; 235 /* now off to subtract IP_DF flag if needed */ 236 237 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 238 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 239 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 240 } 241 } 242 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 243 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 244 /* 245 * For this guy we also mark for immediate 246 * resend since we sent to big of chunk 247 */ 248 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 249 if (chk->sent != SCTP_DATAGRAM_RESEND) 250 stcb->asoc.sent_queue_retran_cnt++; 251 chk->sent = SCTP_DATAGRAM_RESEND; 252 chk->rec.data.doing_fast_retransmit = 0; 253 254 chk->sent = SCTP_DATAGRAM_RESEND; 255 /* Clear any time so NO RTT is being done */ 256 chk->sent_rcv_time.tv_sec = 0; 257 chk->sent_rcv_time.tv_usec = 0; 258 stcb->asoc.total_flight -= chk->send_size; 259 net->flight_size -= chk->send_size; 260 } 261 } 262 } 263 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 264out: 265 if (stcb) { 266 SCTP_TCB_UNLOCK(stcb); 267 } 268} 269 270 271void 272sctp6_notify(struct sctp_inpcb *inp, 273 struct icmp6_hdr *icmph, 274 struct sctphdr *sh, 275 struct sockaddr *to, 276 struct sctp_tcb *stcb, 277 struct sctp_nets *net) 278{ 279#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 280 struct socket *so; 281 282#endif 283 284 /* protection */ 285 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 286 (sh == NULL) || (to == NULL)) { 287 if (stcb) 288 SCTP_TCB_UNLOCK(stcb); 289 return; 290 } 291 /* First job is to verify the vtag matches what I would send */ 292 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 293 SCTP_TCB_UNLOCK(stcb); 294 return; 295 } 296 if (icmph->icmp6_type != ICMP_UNREACH) { 297 /* We only care about unreachable */ 298 SCTP_TCB_UNLOCK(stcb); 299 return; 300 } 301 if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 302 (icmph->icmp6_code == ICMP_UNREACH_HOST) || 303 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 304 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 305 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 306 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 307 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 308 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 309 310 /* 311 * Hmm reachablity problems we must examine closely. If its 312 * not reachable, we may have lost a network. Or if there is 313 * NO protocol at the other end named SCTP. well we consider 314 * it a OOTB abort. 315 */ 316 if (net->dest_state & SCTP_ADDR_REACHABLE) { 317 /* Ok that destination is NOT reachable */ 318 net->dest_state &= ~SCTP_ADDR_REACHABLE; 319 net->dest_state &= ~SCTP_ADDR_PF; 320 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 321 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 322 } 323 SCTP_TCB_UNLOCK(stcb); 324 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 325 (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 326 /* 327 * Here the peer is either playing tricks on us, including 328 * an address that belongs to someone who does not support 329 * SCTP OR was a userland implementation that shutdown and 330 * now is dead. In either case treat it like a OOTB abort 331 * with no TCB 332 */ 333 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 334#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 335 so = SCTP_INP_SO(inp); 336 atomic_add_int(&stcb->asoc.refcnt, 1); 337 SCTP_TCB_UNLOCK(stcb); 338 SCTP_SOCKET_LOCK(so, 1); 339 SCTP_TCB_LOCK(stcb); 340 atomic_subtract_int(&stcb->asoc.refcnt, 1); 341#endif 342 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 343#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 344 SCTP_SOCKET_UNLOCK(so, 1); 345 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 346#endif 347 /* no need to unlock here, since the TCB is gone */ 348 } else { 349 SCTP_TCB_UNLOCK(stcb); 350 } 351} 352 353 354 355void 356sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 357{ 358 struct sctphdr sh; 359 struct ip6ctlparam *ip6cp = NULL; 360 uint32_t vrf_id; 361 362 vrf_id = SCTP_DEFAULT_VRFID; 363 364 if (pktdst->sa_family != AF_INET6 || 365 pktdst->sa_len != sizeof(struct sockaddr_in6)) 366 return; 367 368 if ((unsigned)cmd >= PRC_NCMDS) 369 return; 370 if (PRC_IS_REDIRECT(cmd)) { 371 d = NULL; 372 } else if (inet6ctlerrmap[cmd] == 0) { 373 return; 374 } 375 /* if the parameter is from icmp6, decode it. */ 376 if (d != NULL) { 377 ip6cp = (struct ip6ctlparam *)d; 378 } else { 379 ip6cp = (struct ip6ctlparam *)NULL; 380 } 381 382 if (ip6cp) { 383 /* 384 * XXX: We assume that when IPV6 is non NULL, M and OFF are 385 * valid. 386 */ 387 /* check if we can safely examine src and dst ports */ 388 struct sctp_inpcb *inp = NULL; 389 struct sctp_tcb *stcb = NULL; 390 struct sctp_nets *net = NULL; 391 struct sockaddr_in6 final; 392 393 if (ip6cp->ip6c_m == NULL) 394 return; 395 396 bzero(&sh, sizeof(sh)); 397 bzero(&final, sizeof(final)); 398 inp = NULL; 399 net = NULL; 400 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 401 (caddr_t)&sh); 402 ip6cp->ip6c_src->sin6_port = sh.src_port; 403 final.sin6_len = sizeof(final); 404 final.sin6_family = AF_INET6; 405 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 406 final.sin6_port = sh.dest_port; 407 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 408 (struct sockaddr *)ip6cp->ip6c_src, 409 &inp, &net, 1, vrf_id); 410 /* inp's ref-count increased && stcb locked */ 411 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 412 if (cmd == PRC_MSGSIZE) { 413 sctp6_notify_mbuf(inp, 414 ip6cp->ip6c_icmp6, 415 &sh, 416 stcb, 417 net); 418 /* inp's ref-count reduced && stcb unlocked */ 419 } else { 420 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 421 (struct sockaddr *)&final, 422 stcb, net); 423 /* inp's ref-count reduced && stcb unlocked */ 424 } 425 } else { 426 if (PRC_IS_REDIRECT(cmd) && inp) { 427 in6_rtchange((struct in6pcb *)inp, 428 inet6ctlerrmap[cmd]); 429 } 430 if (inp) { 431 /* reduce inp's ref-count */ 432 SCTP_INP_WLOCK(inp); 433 SCTP_INP_DECR_REF(inp); 434 SCTP_INP_WUNLOCK(inp); 435 } 436 if (stcb) 437 SCTP_TCB_UNLOCK(stcb); 438 } 439 } 440} 441 442/* 443 * this routine can probably be collasped into the one in sctp_userreq.c 444 * since they do the same thing and now we lookup with a sockaddr 445 */ 446static int 447sctp6_getcred(SYSCTL_HANDLER_ARGS) 448{ 449 struct xucred xuc; 450 struct sockaddr_in6 addrs[2]; 451 struct sctp_inpcb *inp; 452 struct sctp_nets *net; 453 struct sctp_tcb *stcb; 454 int error; 455 uint32_t vrf_id; 456 457 vrf_id = SCTP_DEFAULT_VRFID; 458 459 error = priv_check(req->td, PRIV_NETINET_GETCRED); 460 if (error) 461 return (error); 462 463 if (req->newlen != sizeof(addrs)) { 464 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 465 return (EINVAL); 466 } 467 if (req->oldlen != sizeof(struct ucred)) { 468 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 469 return (EINVAL); 470 } 471 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 472 if (error) 473 return (error); 474 475 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 476 sin6tosa(&addrs[0]), 477 &inp, &net, 1, vrf_id); 478 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 479 if ((inp != NULL) && (stcb == NULL)) { 480 /* reduce ref-count */ 481 SCTP_INP_WLOCK(inp); 482 SCTP_INP_DECR_REF(inp); 483 goto cred_can_cont; 484 } 485 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 486 error = ENOENT; 487 goto out; 488 } 489 SCTP_TCB_UNLOCK(stcb); 490 /* 491 * We use the write lock here, only since in the error leg we need 492 * it. If we used RLOCK, then we would have to 493 * wlock/decr/unlock/rlock. Which in theory could create a hole. 494 * Better to use higher wlock. 495 */ 496 SCTP_INP_WLOCK(inp); 497cred_can_cont: 498 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 499 if (error) { 500 SCTP_INP_WUNLOCK(inp); 501 goto out; 502 } 503 cru2x(inp->sctp_socket->so_cred, &xuc); 504 SCTP_INP_WUNLOCK(inp); 505 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 506out: 507 return (error); 508} 509 510SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 511 0, 0, 512 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 513 514 515/* This is the same as the sctp_abort() could be made common */ 516static void 517sctp6_abort(struct socket *so) 518{ 519 struct sctp_inpcb *inp; 520 uint32_t flags; 521 522 inp = (struct sctp_inpcb *)so->so_pcb; 523 if (inp == NULL) { 524 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 525 return; 526 } 527sctp_must_try_again: 528 flags = inp->sctp_flags; 529#ifdef SCTP_LOG_CLOSING 530 sctp_log_closing(inp, NULL, 17); 531#endif 532 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 533 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 534#ifdef SCTP_LOG_CLOSING 535 sctp_log_closing(inp, NULL, 16); 536#endif 537 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 538 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 539 SOCK_LOCK(so); 540 SCTP_SB_CLEAR(so->so_snd); 541 /* 542 * same for the rcv ones, they are only here for the 543 * accounting/select. 544 */ 545 SCTP_SB_CLEAR(so->so_rcv); 546 /* Now null out the reference, we are completely detached. */ 547 so->so_pcb = NULL; 548 SOCK_UNLOCK(so); 549 } else { 550 flags = inp->sctp_flags; 551 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 552 goto sctp_must_try_again; 553 } 554 } 555 return; 556} 557 558static int 559sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 560{ 561 struct in6pcb *inp6; 562 int error; 563 struct sctp_inpcb *inp; 564 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 565 566 inp = (struct sctp_inpcb *)so->so_pcb; 567 if (inp != NULL) { 568 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 569 return (EINVAL); 570 } 571 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 572 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 573 if (error) 574 return (error); 575 } 576 error = sctp_inpcb_alloc(so, vrf_id); 577 if (error) 578 return (error); 579 inp = (struct sctp_inpcb *)so->so_pcb; 580 SCTP_INP_WLOCK(inp); 581 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 582 inp6 = (struct in6pcb *)inp; 583 584 inp6->inp_vflag |= INP_IPV6; 585 inp6->in6p_hops = -1; /* use kernel default */ 586 inp6->in6p_cksum = -1; /* just to be sure */ 587#ifdef INET 588 /* 589 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 590 * socket as well, because the socket may be bound to an IPv6 591 * wildcard address, which may match an IPv4-mapped IPv6 address. 592 */ 593 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 594#endif 595 /* 596 * Hmm what about the IPSEC stuff that is missing here but in 597 * sctp_attach()? 598 */ 599 SCTP_INP_WUNLOCK(inp); 600 return (0); 601} 602 603static int 604sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 605{ 606 struct sctp_inpcb *inp; 607 struct in6pcb *inp6; 608 int error; 609 610 inp = (struct sctp_inpcb *)so->so_pcb; 611 if (inp == NULL) { 612 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 613 return (EINVAL); 614 } 615 if (addr) { 616 switch (addr->sa_family) { 617#ifdef INET 618 case AF_INET: 619 if (addr->sa_len != sizeof(struct sockaddr_in)) { 620 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 621 return (EINVAL); 622 } 623 break; 624#endif 625#ifdef INET6 626 case AF_INET6: 627 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 628 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 629 return (EINVAL); 630 } 631 break; 632#endif 633 default: 634 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 635 return (EINVAL); 636 } 637 } 638 inp6 = (struct in6pcb *)inp; 639 inp6->inp_vflag &= ~INP_IPV4; 640 inp6->inp_vflag |= INP_IPV6; 641 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 642 switch (addr->sa_family) { 643#ifdef INET 644 case AF_INET: 645 /* binding v4 addr to v6 socket, so reset flags */ 646 inp6->inp_vflag |= INP_IPV4; 647 inp6->inp_vflag &= ~INP_IPV6; 648 break; 649#endif 650#ifdef INET6 651 case AF_INET6: 652 { 653 struct sockaddr_in6 *sin6_p; 654 655 sin6_p = (struct sockaddr_in6 *)addr; 656 657 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 658 inp6->inp_vflag |= INP_IPV4; 659 } 660#ifdef INET 661 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 662 struct sockaddr_in sin; 663 664 in6_sin6_2_sin(&sin, sin6_p); 665 inp6->inp_vflag |= INP_IPV4; 666 inp6->inp_vflag &= ~INP_IPV6; 667 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 668 return (error); 669 } 670#endif 671 break; 672 } 673#endif 674 default: 675 break; 676 } 677 } else if (addr != NULL) { 678 struct sockaddr_in6 *sin6_p; 679 680 /* IPV6_V6ONLY socket */ 681#ifdef INET 682 if (addr->sa_family == AF_INET) { 683 /* can't bind v4 addr to v6 only socket! */ 684 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 685 return (EINVAL); 686 } 687#endif 688 sin6_p = (struct sockaddr_in6 *)addr; 689 690 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 691 /* can't bind v4-mapped addrs either! */ 692 /* NOTE: we don't support SIIT */ 693 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 694 return (EINVAL); 695 } 696 } 697 error = sctp_inpcb_bind(so, addr, NULL, p); 698 return (error); 699} 700 701 702static void 703sctp6_close(struct socket *so) 704{ 705 sctp_close(so); 706} 707 708/* This could be made common with sctp_detach() since they are identical */ 709 710static 711int 712sctp6_disconnect(struct socket *so) 713{ 714 return (sctp_disconnect(so)); 715} 716 717 718int 719sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 720 struct mbuf *control, struct thread *p); 721 722 723static int 724sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 725 struct mbuf *control, struct thread *p) 726{ 727 struct sctp_inpcb *inp; 728 struct in6pcb *inp6; 729 730#ifdef INET 731 struct sockaddr_in6 *sin6; 732 733#endif /* INET */ 734 /* No SPL needed since sctp_output does this */ 735 736 inp = (struct sctp_inpcb *)so->so_pcb; 737 if (inp == NULL) { 738 if (control) { 739 SCTP_RELEASE_PKT(control); 740 control = NULL; 741 } 742 SCTP_RELEASE_PKT(m); 743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 744 return (EINVAL); 745 } 746 inp6 = (struct in6pcb *)inp; 747 /* 748 * For the TCP model we may get a NULL addr, if we are a connected 749 * socket thats ok. 750 */ 751 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 752 (addr == NULL)) { 753 goto connected_type; 754 } 755 if (addr == NULL) { 756 SCTP_RELEASE_PKT(m); 757 if (control) { 758 SCTP_RELEASE_PKT(control); 759 control = NULL; 760 } 761 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 762 return (EDESTADDRREQ); 763 } 764#ifdef INET 765 sin6 = (struct sockaddr_in6 *)addr; 766 if (SCTP_IPV6_V6ONLY(inp6)) { 767 /* 768 * if IPV6_V6ONLY flag, we discard datagrams destined to a 769 * v4 addr or v4-mapped addr 770 */ 771 if (addr->sa_family == AF_INET) { 772 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 773 return (EINVAL); 774 } 775 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 776 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 777 return (EINVAL); 778 } 779 } 780 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 781 struct sockaddr_in sin; 782 783 /* convert v4-mapped into v4 addr and send */ 784 in6_sin6_2_sin(&sin, sin6); 785 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 786 } 787#endif /* INET */ 788connected_type: 789 /* now what about control */ 790 if (control) { 791 if (inp->control) { 792 SCTP_PRINTF("huh? control set?\n"); 793 SCTP_RELEASE_PKT(inp->control); 794 inp->control = NULL; 795 } 796 inp->control = control; 797 } 798 /* Place the data */ 799 if (inp->pkt) { 800 SCTP_BUF_NEXT(inp->pkt_last) = m; 801 inp->pkt_last = m; 802 } else { 803 inp->pkt_last = inp->pkt = m; 804 } 805 if ( 806 /* FreeBSD and MacOSX uses a flag passed */ 807 ((flags & PRUS_MORETOCOME) == 0) 808 ) { 809 /* 810 * note with the current version this code will only be used 811 * by OpenBSD, NetBSD and FreeBSD have methods for 812 * re-defining sosend() to use sctp_sosend(). One can 813 * optionaly switch back to this code (by changing back the 814 * defininitions but this is not advisable. 815 */ 816 int ret; 817 818 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 819 inp->pkt = NULL; 820 inp->control = NULL; 821 return (ret); 822 } else { 823 return (0); 824 } 825} 826 827static int 828sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 829{ 830 uint32_t vrf_id; 831 int error = 0; 832 struct sctp_inpcb *inp; 833 struct sctp_tcb *stcb; 834 835#ifdef INET 836 struct in6pcb *inp6; 837 struct sockaddr_in6 *sin6; 838 union sctp_sockstore store; 839 840#endif 841 842#ifdef INET 843 inp6 = (struct in6pcb *)so->so_pcb; 844#endif 845 inp = (struct sctp_inpcb *)so->so_pcb; 846 if (inp == NULL) { 847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 848 return (ECONNRESET); /* I made the same as TCP since we are 849 * not setup? */ 850 } 851 if (addr == NULL) { 852 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 853 return (EINVAL); 854 } 855 switch (addr->sa_family) { 856#ifdef INET 857 case AF_INET: 858 if (addr->sa_len != sizeof(struct sockaddr_in)) { 859 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 860 return (EINVAL); 861 } 862 break; 863#endif 864#ifdef INET6 865 case AF_INET6: 866 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 867 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 868 return (EINVAL); 869 } 870 break; 871#endif 872 default: 873 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 874 return (EINVAL); 875 } 876 877 vrf_id = inp->def_vrf_id; 878 SCTP_ASOC_CREATE_LOCK(inp); 879 SCTP_INP_RLOCK(inp); 880 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 881 SCTP_PCB_FLAGS_UNBOUND) { 882 /* Bind a ephemeral port */ 883 SCTP_INP_RUNLOCK(inp); 884 error = sctp6_bind(so, NULL, p); 885 if (error) { 886 SCTP_ASOC_CREATE_UNLOCK(inp); 887 888 return (error); 889 } 890 SCTP_INP_RLOCK(inp); 891 } 892 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 893 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 894 /* We are already connected AND the TCP model */ 895 SCTP_INP_RUNLOCK(inp); 896 SCTP_ASOC_CREATE_UNLOCK(inp); 897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 898 return (EADDRINUSE); 899 } 900#ifdef INET 901 sin6 = (struct sockaddr_in6 *)addr; 902 if (SCTP_IPV6_V6ONLY(inp6)) { 903 /* 904 * if IPV6_V6ONLY flag, ignore connections destined to a v4 905 * addr or v4-mapped addr 906 */ 907 if (addr->sa_family == AF_INET) { 908 SCTP_INP_RUNLOCK(inp); 909 SCTP_ASOC_CREATE_UNLOCK(inp); 910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 911 return (EINVAL); 912 } 913 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 914 SCTP_INP_RUNLOCK(inp); 915 SCTP_ASOC_CREATE_UNLOCK(inp); 916 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 917 return (EINVAL); 918 } 919 } 920 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 921 /* convert v4-mapped into v4 addr */ 922 in6_sin6_2_sin(&store.sin, sin6); 923 addr = &store.sa; 924 } 925#endif /* INET */ 926 /* Now do we connect? */ 927 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 928 stcb = LIST_FIRST(&inp->sctp_asoc_list); 929 if (stcb) { 930 SCTP_TCB_UNLOCK(stcb); 931 } 932 SCTP_INP_RUNLOCK(inp); 933 } else { 934 SCTP_INP_RUNLOCK(inp); 935 SCTP_INP_WLOCK(inp); 936 SCTP_INP_INCR_REF(inp); 937 SCTP_INP_WUNLOCK(inp); 938 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 939 if (stcb == NULL) { 940 SCTP_INP_WLOCK(inp); 941 SCTP_INP_DECR_REF(inp); 942 SCTP_INP_WUNLOCK(inp); 943 } 944 } 945 946 if (stcb != NULL) { 947 /* Already have or am bring up an association */ 948 SCTP_ASOC_CREATE_UNLOCK(inp); 949 SCTP_TCB_UNLOCK(stcb); 950 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 951 return (EALREADY); 952 } 953 /* We are GOOD to go */ 954 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 955 SCTP_ASOC_CREATE_UNLOCK(inp); 956 if (stcb == NULL) { 957 /* Gak! no memory */ 958 return (error); 959 } 960 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 961 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 962 /* Set the connected flag so we can queue data */ 963 soisconnecting(so); 964 } 965 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 966 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 967 968 /* initialize authentication parameters for the assoc */ 969 sctp_initialize_auth_params(inp, stcb); 970 971 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 972 SCTP_TCB_UNLOCK(stcb); 973 return (error); 974} 975 976static int 977sctp6_getaddr(struct socket *so, struct sockaddr **addr) 978{ 979 struct sockaddr_in6 *sin6; 980 struct sctp_inpcb *inp; 981 uint32_t vrf_id; 982 struct sctp_ifa *sctp_ifa; 983 984 int error; 985 986 /* 987 * Do the malloc first in case it blocks. 988 */ 989 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 990 if (sin6 == NULL) 991 return (ENOMEM); 992 sin6->sin6_family = AF_INET6; 993 sin6->sin6_len = sizeof(*sin6); 994 995 inp = (struct sctp_inpcb *)so->so_pcb; 996 if (inp == NULL) { 997 SCTP_FREE_SONAME(sin6); 998 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 999 return (ECONNRESET); 1000 } 1001 SCTP_INP_RLOCK(inp); 1002 sin6->sin6_port = inp->sctp_lport; 1003 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1004 /* For the bound all case you get back 0 */ 1005 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1006 struct sctp_tcb *stcb; 1007 struct sockaddr_in6 *sin_a6; 1008 struct sctp_nets *net; 1009 int fnd; 1010 1011 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1012 if (stcb == NULL) { 1013 goto notConn6; 1014 } 1015 fnd = 0; 1016 sin_a6 = NULL; 1017 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1018 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1019 if (sin_a6 == NULL) 1020 /* this will make coverity happy */ 1021 continue; 1022 1023 if (sin_a6->sin6_family == AF_INET6) { 1024 fnd = 1; 1025 break; 1026 } 1027 } 1028 if ((!fnd) || (sin_a6 == NULL)) { 1029 /* punt */ 1030 goto notConn6; 1031 } 1032 vrf_id = inp->def_vrf_id; 1033 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1034 if (sctp_ifa) { 1035 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1036 } 1037 } else { 1038 /* For the bound all case you get back 0 */ 1039 notConn6: 1040 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1041 } 1042 } else { 1043 /* Take the first IPv6 address in the list */ 1044 struct sctp_laddr *laddr; 1045 int fnd = 0; 1046 1047 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1048 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1049 struct sockaddr_in6 *sin_a; 1050 1051 sin_a = &laddr->ifa->address.sin6; 1052 sin6->sin6_addr = sin_a->sin6_addr; 1053 fnd = 1; 1054 break; 1055 } 1056 } 1057 if (!fnd) { 1058 SCTP_FREE_SONAME(sin6); 1059 SCTP_INP_RUNLOCK(inp); 1060 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1061 return (ENOENT); 1062 } 1063 } 1064 SCTP_INP_RUNLOCK(inp); 1065 /* Scoping things for v6 */ 1066 if ((error = sa6_recoverscope(sin6)) != 0) { 1067 SCTP_FREE_SONAME(sin6); 1068 return (error); 1069 } 1070 (*addr) = (struct sockaddr *)sin6; 1071 return (0); 1072} 1073 1074static int 1075sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1076{ 1077 struct sockaddr_in6 *sin6; 1078 int fnd; 1079 struct sockaddr_in6 *sin_a6; 1080 struct sctp_inpcb *inp; 1081 struct sctp_tcb *stcb; 1082 struct sctp_nets *net; 1083 int error; 1084 1085 /* Do the malloc first in case it blocks. */ 1086 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1087 if (sin6 == NULL) 1088 return (ENOMEM); 1089 sin6->sin6_family = AF_INET6; 1090 sin6->sin6_len = sizeof(*sin6); 1091 1092 inp = (struct sctp_inpcb *)so->so_pcb; 1093 if ((inp == NULL) || 1094 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1095 /* UDP type and listeners will drop out here */ 1096 SCTP_FREE_SONAME(sin6); 1097 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1098 return (ENOTCONN); 1099 } 1100 SCTP_INP_RLOCK(inp); 1101 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1102 if (stcb) { 1103 SCTP_TCB_LOCK(stcb); 1104 } 1105 SCTP_INP_RUNLOCK(inp); 1106 if (stcb == NULL) { 1107 SCTP_FREE_SONAME(sin6); 1108 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1109 return (ECONNRESET); 1110 } 1111 fnd = 0; 1112 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1113 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1114 if (sin_a6->sin6_family == AF_INET6) { 1115 fnd = 1; 1116 sin6->sin6_port = stcb->rport; 1117 sin6->sin6_addr = sin_a6->sin6_addr; 1118 break; 1119 } 1120 } 1121 SCTP_TCB_UNLOCK(stcb); 1122 if (!fnd) { 1123 /* No IPv4 address */ 1124 SCTP_FREE_SONAME(sin6); 1125 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1126 return (ENOENT); 1127 } 1128 if ((error = sa6_recoverscope(sin6)) != 0) 1129 return (error); 1130 *addr = (struct sockaddr *)sin6; 1131 return (0); 1132} 1133 1134static int 1135sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1136{ 1137#ifdef INET 1138 struct sockaddr *addr; 1139 1140#endif 1141 struct in6pcb *inp6 = sotoin6pcb(so); 1142 int error; 1143 1144 if (inp6 == NULL) { 1145 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1146 return (EINVAL); 1147 } 1148 /* allow v6 addresses precedence */ 1149 error = sctp6_getaddr(so, nam); 1150#ifdef INET 1151 if (error) { 1152 /* try v4 next if v6 failed */ 1153 error = sctp_ingetaddr(so, nam); 1154 if (error) { 1155 return (error); 1156 } 1157 addr = *nam; 1158 /* if I'm V6ONLY, convert it to v4-mapped */ 1159 if (SCTP_IPV6_V6ONLY(inp6)) { 1160 struct sockaddr_in6 sin6; 1161 1162 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1163 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1164 } 1165 } 1166#endif 1167 return (error); 1168} 1169 1170 1171static int 1172sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1173{ 1174#ifdef INET 1175 struct sockaddr *addr; 1176 1177#endif 1178 struct in6pcb *inp6 = sotoin6pcb(so); 1179 int error; 1180 1181 if (inp6 == NULL) { 1182 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1183 return (EINVAL); 1184 } 1185 /* allow v6 addresses precedence */ 1186 error = sctp6_peeraddr(so, nam); 1187#ifdef INET 1188 if (error) { 1189 /* try v4 next if v6 failed */ 1190 error = sctp_peeraddr(so, nam); 1191 if (error) { 1192 return (error); 1193 } 1194 addr = *nam; 1195 /* if I'm V6ONLY, convert it to v4-mapped */ 1196 if (SCTP_IPV6_V6ONLY(inp6)) { 1197 struct sockaddr_in6 sin6; 1198 1199 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1200 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1201 } 1202 } 1203#endif 1204 return (error); 1205} 1206 1207struct pr_usrreqs sctp6_usrreqs = { 1208 .pru_abort = sctp6_abort, 1209 .pru_accept = sctp_accept, 1210 .pru_attach = sctp6_attach, 1211 .pru_bind = sctp6_bind, 1212 .pru_connect = sctp6_connect, 1213 .pru_control = in6_control, 1214 .pru_close = sctp6_close, 1215 .pru_detach = sctp6_close, 1216 .pru_sopoll = sopoll_generic, 1217 .pru_flush = sctp_flush, 1218 .pru_disconnect = sctp6_disconnect, 1219 .pru_listen = sctp_listen, 1220 .pru_peeraddr = sctp6_getpeeraddr, 1221 .pru_send = sctp6_send, 1222 .pru_shutdown = sctp_shutdown, 1223 .pru_sockaddr = sctp6_in6getaddr, 1224 .pru_sosend = sctp_sosend, 1225 .pru_soreceive = sctp_soreceive 1226}; 1227 1228#endif 1229