sctp6_usrreq.c revision 284633
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 284633 2015-06-20 08:25:27Z 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 uint16_t fibnum; 88 89 iphlen = *offp; 90 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 91 SCTP_RELEASE_PKT(*i_pak); 92 return (IPPROTO_DONE); 93 } 94 m = SCTP_HEADER_TO_CHAIN(*i_pak); 95#ifdef SCTP_MBUF_LOGGING 96 /* Log in any input mbufs */ 97 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 98 sctp_log_mbc(m, SCTP_MBUF_INPUT); 99 } 100#endif 101#ifdef SCTP_PACKET_LOGGING 102 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 103 sctp_packet_log(m); 104 } 105#endif 106 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 107 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 108 m->m_pkthdr.len, 109 if_name(m->m_pkthdr.rcvif), 110 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 111 mflowid = m->m_pkthdr.flowid; 112 mflowtype = M_HASHTYPE_GET(m); 113 fibnum = M_GETFIB(m); 114 SCTP_STAT_INCR(sctps_recvpackets); 115 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 116 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 117 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 118 ip6 = mtod(m, struct ip6_hdr *); 119 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 120 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 121 if (sh == NULL) { 122 SCTP_STAT_INCR(sctps_hdrops); 123 return (IPPROTO_DONE); 124 } 125 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 126 offset -= sizeof(struct sctp_chunkhdr); 127 memset(&src, 0, sizeof(struct sockaddr_in6)); 128 src.sin6_family = AF_INET6; 129 src.sin6_len = sizeof(struct sockaddr_in6); 130 src.sin6_port = sh->src_port; 131 src.sin6_addr = ip6->ip6_src; 132 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 133 goto out; 134 } 135 memset(&dst, 0, sizeof(struct sockaddr_in6)); 136 dst.sin6_family = AF_INET6; 137 dst.sin6_len = sizeof(struct sockaddr_in6); 138 dst.sin6_port = sh->dest_port; 139 dst.sin6_addr = ip6->ip6_dst; 140 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 141 goto out; 142 } 143 if (faithprefix_p != NULL && (*faithprefix_p) (&dst.sin6_addr)) { 144 /* XXX send icmp6 host/port unreach? */ 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, fibnum, 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, 221 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 222 223 /* Adjust destination size limit */ 224 if (net->mtu > nxtsz) { 225 net->mtu = nxtsz; 226 if (net->port) { 227 net->mtu -= sizeof(struct udphdr); 228 } 229 } 230 /* now what about the ep? */ 231 if (stcb->asoc.smallest_mtu > nxtsz) { 232 struct sctp_tmit_chunk *chk; 233 234 /* Adjust that too */ 235 stcb->asoc.smallest_mtu = nxtsz; 236 /* now off to subtract IP_DF flag if needed */ 237 238 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 239 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 240 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 241 } 242 } 243 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 244 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 245 /* 246 * For this guy we also mark for immediate 247 * resend since we sent to big of chunk 248 */ 249 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 250 if (chk->sent != SCTP_DATAGRAM_RESEND) 251 stcb->asoc.sent_queue_retran_cnt++; 252 chk->sent = SCTP_DATAGRAM_RESEND; 253 chk->rec.data.doing_fast_retransmit = 0; 254 255 chk->sent = SCTP_DATAGRAM_RESEND; 256 /* Clear any time so NO RTT is being done */ 257 chk->sent_rcv_time.tv_sec = 0; 258 chk->sent_rcv_time.tv_usec = 0; 259 stcb->asoc.total_flight -= chk->send_size; 260 net->flight_size -= chk->send_size; 261 } 262 } 263 } 264 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 265out: 266 if (stcb) { 267 SCTP_TCB_UNLOCK(stcb); 268 } 269} 270 271 272void 273sctp6_notify(struct sctp_inpcb *inp, 274 struct icmp6_hdr *icmph, 275 struct sctphdr *sh, 276 struct sockaddr *to, 277 struct sctp_tcb *stcb, 278 struct sctp_nets *net) 279{ 280#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 281 struct socket *so; 282 283#endif 284 285 /* protection */ 286 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 287 (sh == NULL) || (to == NULL)) { 288 if (stcb) 289 SCTP_TCB_UNLOCK(stcb); 290 return; 291 } 292 /* First job is to verify the vtag matches what I would send */ 293 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 294 SCTP_TCB_UNLOCK(stcb); 295 return; 296 } 297 if (icmph->icmp6_type != ICMP_UNREACH) { 298 /* We only care about unreachable */ 299 SCTP_TCB_UNLOCK(stcb); 300 return; 301 } 302 if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 303 (icmph->icmp6_code == ICMP_UNREACH_HOST) || 304 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 305 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 306 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 307 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 308 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 309 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 310 311 /* 312 * Hmm reachablity problems we must examine closely. If its 313 * not reachable, we may have lost a network. Or if there is 314 * NO protocol at the other end named SCTP. well we consider 315 * it a OOTB abort. 316 */ 317 if (net->dest_state & SCTP_ADDR_REACHABLE) { 318 /* Ok that destination is NOT reachable */ 319 net->dest_state &= ~SCTP_ADDR_REACHABLE; 320 net->dest_state &= ~SCTP_ADDR_PF; 321 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 322 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 323 } 324 SCTP_TCB_UNLOCK(stcb); 325 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 326 (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 327 /* 328 * Here the peer is either playing tricks on us, including 329 * an address that belongs to someone who does not support 330 * SCTP OR was a userland implementation that shutdown and 331 * now is dead. In either case treat it like a OOTB abort 332 * with no TCB 333 */ 334 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 335#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 336 so = SCTP_INP_SO(inp); 337 atomic_add_int(&stcb->asoc.refcnt, 1); 338 SCTP_TCB_UNLOCK(stcb); 339 SCTP_SOCKET_LOCK(so, 1); 340 SCTP_TCB_LOCK(stcb); 341 atomic_subtract_int(&stcb->asoc.refcnt, 1); 342#endif 343 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 344 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 345#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 346 SCTP_SOCKET_UNLOCK(so, 1); 347 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 348#endif 349 /* no need to unlock here, since the TCB is gone */ 350 } else { 351 SCTP_TCB_UNLOCK(stcb); 352 } 353} 354 355 356 357void 358sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 359{ 360 struct sctphdr sh; 361 struct ip6ctlparam *ip6cp = NULL; 362 uint32_t vrf_id; 363 364 vrf_id = SCTP_DEFAULT_VRFID; 365 366 if (pktdst->sa_family != AF_INET6 || 367 pktdst->sa_len != sizeof(struct sockaddr_in6)) 368 return; 369 370 if ((unsigned)cmd >= PRC_NCMDS) 371 return; 372 if (PRC_IS_REDIRECT(cmd)) { 373 d = NULL; 374 } else if (inet6ctlerrmap[cmd] == 0) { 375 return; 376 } 377 /* if the parameter is from icmp6, decode it. */ 378 if (d != NULL) { 379 ip6cp = (struct ip6ctlparam *)d; 380 } else { 381 ip6cp = (struct ip6ctlparam *)NULL; 382 } 383 384 if (ip6cp) { 385 /* 386 * XXX: We assume that when IPV6 is non NULL, M and OFF are 387 * valid. 388 */ 389 /* check if we can safely examine src and dst ports */ 390 struct sctp_inpcb *inp = NULL; 391 struct sctp_tcb *stcb = NULL; 392 struct sctp_nets *net = NULL; 393 struct sockaddr_in6 final; 394 395 if (ip6cp->ip6c_m == NULL) 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; 611 612 inp = (struct sctp_inpcb *)so->so_pcb; 613 if (inp == NULL) { 614 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 615 return (EINVAL); 616 } 617 if (addr) { 618 switch (addr->sa_family) { 619#ifdef INET 620 case AF_INET: 621 if (addr->sa_len != sizeof(struct sockaddr_in)) { 622 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 623 return (EINVAL); 624 } 625 break; 626#endif 627#ifdef INET6 628 case AF_INET6: 629 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 630 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 631 return (EINVAL); 632 } 633 break; 634#endif 635 default: 636 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 637 return (EINVAL); 638 } 639 } 640 inp6 = (struct in6pcb *)inp; 641 inp6->inp_vflag &= ~INP_IPV4; 642 inp6->inp_vflag |= INP_IPV6; 643 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 644 switch (addr->sa_family) { 645#ifdef INET 646 case AF_INET: 647 /* binding v4 addr to v6 socket, so reset flags */ 648 inp6->inp_vflag |= INP_IPV4; 649 inp6->inp_vflag &= ~INP_IPV6; 650 break; 651#endif 652#ifdef INET6 653 case AF_INET6: 654 { 655 struct sockaddr_in6 *sin6_p; 656 657 sin6_p = (struct sockaddr_in6 *)addr; 658 659 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 660 inp6->inp_vflag |= INP_IPV4; 661 } 662#ifdef INET 663 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 664 struct sockaddr_in sin; 665 666 in6_sin6_2_sin(&sin, sin6_p); 667 inp6->inp_vflag |= INP_IPV4; 668 inp6->inp_vflag &= ~INP_IPV6; 669 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 670 return (error); 671 } 672#endif 673 break; 674 } 675#endif 676 default: 677 break; 678 } 679 } else if (addr != NULL) { 680 struct sockaddr_in6 *sin6_p; 681 682 /* IPV6_V6ONLY socket */ 683#ifdef INET 684 if (addr->sa_family == AF_INET) { 685 /* can't bind v4 addr to v6 only socket! */ 686 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 687 return (EINVAL); 688 } 689#endif 690 sin6_p = (struct sockaddr_in6 *)addr; 691 692 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 693 /* can't bind v4-mapped addrs either! */ 694 /* NOTE: we don't support SIIT */ 695 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 696 return (EINVAL); 697 } 698 } 699 error = sctp_inpcb_bind(so, addr, NULL, p); 700 return (error); 701} 702 703 704static void 705sctp6_close(struct socket *so) 706{ 707 sctp_close(so); 708} 709 710/* This could be made common with sctp_detach() since they are identical */ 711 712static 713int 714sctp6_disconnect(struct socket *so) 715{ 716 return (sctp_disconnect(so)); 717} 718 719 720int 721sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 722 struct mbuf *control, struct thread *p); 723 724 725static int 726sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 727 struct mbuf *control, struct thread *p) 728{ 729 struct sctp_inpcb *inp; 730 struct in6pcb *inp6; 731 732#ifdef INET 733 struct sockaddr_in6 *sin6; 734 735#endif /* INET */ 736 /* No SPL needed since sctp_output does this */ 737 738 inp = (struct sctp_inpcb *)so->so_pcb; 739 if (inp == NULL) { 740 if (control) { 741 SCTP_RELEASE_PKT(control); 742 control = NULL; 743 } 744 SCTP_RELEASE_PKT(m); 745 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 746 return (EINVAL); 747 } 748 inp6 = (struct in6pcb *)inp; 749 /* 750 * For the TCP model we may get a NULL addr, if we are a connected 751 * socket thats ok. 752 */ 753 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 754 (addr == NULL)) { 755 goto connected_type; 756 } 757 if (addr == NULL) { 758 SCTP_RELEASE_PKT(m); 759 if (control) { 760 SCTP_RELEASE_PKT(control); 761 control = NULL; 762 } 763 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 764 return (EDESTADDRREQ); 765 } 766#ifdef INET 767 sin6 = (struct sockaddr_in6 *)addr; 768 if (SCTP_IPV6_V6ONLY(inp6)) { 769 /* 770 * if IPV6_V6ONLY flag, we discard datagrams destined to a 771 * v4 addr or v4-mapped addr 772 */ 773 if (addr->sa_family == AF_INET) { 774 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 775 return (EINVAL); 776 } 777 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 778 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 779 return (EINVAL); 780 } 781 } 782 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 783 struct sockaddr_in sin; 784 785 /* convert v4-mapped into v4 addr and send */ 786 in6_sin6_2_sin(&sin, sin6); 787 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 788 } 789#endif /* INET */ 790connected_type: 791 /* now what about control */ 792 if (control) { 793 if (inp->control) { 794 SCTP_PRINTF("huh? control set?\n"); 795 SCTP_RELEASE_PKT(inp->control); 796 inp->control = NULL; 797 } 798 inp->control = control; 799 } 800 /* Place the data */ 801 if (inp->pkt) { 802 SCTP_BUF_NEXT(inp->pkt_last) = m; 803 inp->pkt_last = m; 804 } else { 805 inp->pkt_last = inp->pkt = m; 806 } 807 if ( 808 /* FreeBSD and MacOSX uses a flag passed */ 809 ((flags & PRUS_MORETOCOME) == 0) 810 ) { 811 /* 812 * note with the current version this code will only be used 813 * by OpenBSD, NetBSD and FreeBSD have methods for 814 * re-defining sosend() to use sctp_sosend(). One can 815 * optionaly switch back to this code (by changing back the 816 * defininitions but this is not advisable. 817 */ 818 int ret; 819 820 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 821 inp->pkt = NULL; 822 inp->control = NULL; 823 return (ret); 824 } else { 825 return (0); 826 } 827} 828 829static int 830sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 831{ 832 uint32_t vrf_id; 833 int error = 0; 834 struct sctp_inpcb *inp; 835 struct sctp_tcb *stcb; 836 837#ifdef INET 838 struct in6pcb *inp6; 839 struct sockaddr_in6 *sin6; 840 union sctp_sockstore store; 841 842#endif 843 844#ifdef INET 845 inp6 = (struct in6pcb *)so->so_pcb; 846#endif 847 inp = (struct sctp_inpcb *)so->so_pcb; 848 if (inp == NULL) { 849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 850 return (ECONNRESET); /* I made the same as TCP since we are 851 * not setup? */ 852 } 853 if (addr == NULL) { 854 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 855 return (EINVAL); 856 } 857 switch (addr->sa_family) { 858#ifdef INET 859 case AF_INET: 860 if (addr->sa_len != sizeof(struct sockaddr_in)) { 861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 862 return (EINVAL); 863 } 864 break; 865#endif 866#ifdef INET6 867 case AF_INET6: 868 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 869 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 870 return (EINVAL); 871 } 872 break; 873#endif 874 default: 875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 876 return (EINVAL); 877 } 878 879 vrf_id = inp->def_vrf_id; 880 SCTP_ASOC_CREATE_LOCK(inp); 881 SCTP_INP_RLOCK(inp); 882 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 883 SCTP_PCB_FLAGS_UNBOUND) { 884 /* Bind a ephemeral port */ 885 SCTP_INP_RUNLOCK(inp); 886 error = sctp6_bind(so, NULL, p); 887 if (error) { 888 SCTP_ASOC_CREATE_UNLOCK(inp); 889 890 return (error); 891 } 892 SCTP_INP_RLOCK(inp); 893 } 894 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 895 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 896 /* We are already connected AND the TCP model */ 897 SCTP_INP_RUNLOCK(inp); 898 SCTP_ASOC_CREATE_UNLOCK(inp); 899 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 900 return (EADDRINUSE); 901 } 902#ifdef INET 903 sin6 = (struct sockaddr_in6 *)addr; 904 if (SCTP_IPV6_V6ONLY(inp6)) { 905 /* 906 * if IPV6_V6ONLY flag, ignore connections destined to a v4 907 * addr or v4-mapped addr 908 */ 909 if (addr->sa_family == AF_INET) { 910 SCTP_INP_RUNLOCK(inp); 911 SCTP_ASOC_CREATE_UNLOCK(inp); 912 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 913 return (EINVAL); 914 } 915 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 916 SCTP_INP_RUNLOCK(inp); 917 SCTP_ASOC_CREATE_UNLOCK(inp); 918 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 919 return (EINVAL); 920 } 921 } 922 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 923 /* convert v4-mapped into v4 addr */ 924 in6_sin6_2_sin(&store.sin, sin6); 925 addr = &store.sa; 926 } 927#endif /* INET */ 928 /* Now do we connect? */ 929 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 930 stcb = LIST_FIRST(&inp->sctp_asoc_list); 931 if (stcb) { 932 SCTP_TCB_UNLOCK(stcb); 933 } 934 SCTP_INP_RUNLOCK(inp); 935 } else { 936 SCTP_INP_RUNLOCK(inp); 937 SCTP_INP_WLOCK(inp); 938 SCTP_INP_INCR_REF(inp); 939 SCTP_INP_WUNLOCK(inp); 940 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 941 if (stcb == NULL) { 942 SCTP_INP_WLOCK(inp); 943 SCTP_INP_DECR_REF(inp); 944 SCTP_INP_WUNLOCK(inp); 945 } 946 } 947 948 if (stcb != NULL) { 949 /* Already have or am bring up an association */ 950 SCTP_ASOC_CREATE_UNLOCK(inp); 951 SCTP_TCB_UNLOCK(stcb); 952 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 953 return (EALREADY); 954 } 955 /* We are GOOD to go */ 956 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 957 SCTP_ASOC_CREATE_UNLOCK(inp); 958 if (stcb == NULL) { 959 /* Gak! no memory */ 960 return (error); 961 } 962 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 963 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 964 /* Set the connected flag so we can queue data */ 965 soisconnecting(so); 966 } 967 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 968 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 969 970 /* initialize authentication parameters for the assoc */ 971 sctp_initialize_auth_params(inp, stcb); 972 973 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 974 SCTP_TCB_UNLOCK(stcb); 975 return (error); 976} 977 978static int 979sctp6_getaddr(struct socket *so, struct sockaddr **addr) 980{ 981 struct sockaddr_in6 *sin6; 982 struct sctp_inpcb *inp; 983 uint32_t vrf_id; 984 struct sctp_ifa *sctp_ifa; 985 986 int error; 987 988 /* 989 * Do the malloc first in case it blocks. 990 */ 991 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 992 if (sin6 == NULL) 993 return (ENOMEM); 994 sin6->sin6_family = AF_INET6; 995 sin6->sin6_len = sizeof(*sin6); 996 997 inp = (struct sctp_inpcb *)so->so_pcb; 998 if (inp == NULL) { 999 SCTP_FREE_SONAME(sin6); 1000 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1001 return (ECONNRESET); 1002 } 1003 SCTP_INP_RLOCK(inp); 1004 sin6->sin6_port = inp->sctp_lport; 1005 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1006 /* For the bound all case you get back 0 */ 1007 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1008 struct sctp_tcb *stcb; 1009 struct sockaddr_in6 *sin_a6; 1010 struct sctp_nets *net; 1011 int fnd; 1012 1013 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1014 if (stcb == NULL) { 1015 goto notConn6; 1016 } 1017 fnd = 0; 1018 sin_a6 = NULL; 1019 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1020 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1021 if (sin_a6 == NULL) 1022 /* this will make coverity happy */ 1023 continue; 1024 1025 if (sin_a6->sin6_family == AF_INET6) { 1026 fnd = 1; 1027 break; 1028 } 1029 } 1030 if ((!fnd) || (sin_a6 == NULL)) { 1031 /* punt */ 1032 goto notConn6; 1033 } 1034 vrf_id = inp->def_vrf_id; 1035 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1036 if (sctp_ifa) { 1037 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1038 } 1039 } else { 1040 /* For the bound all case you get back 0 */ 1041 notConn6: 1042 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1043 } 1044 } else { 1045 /* Take the first IPv6 address in the list */ 1046 struct sctp_laddr *laddr; 1047 int fnd = 0; 1048 1049 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1050 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1051 struct sockaddr_in6 *sin_a; 1052 1053 sin_a = &laddr->ifa->address.sin6; 1054 sin6->sin6_addr = sin_a->sin6_addr; 1055 fnd = 1; 1056 break; 1057 } 1058 } 1059 if (!fnd) { 1060 SCTP_FREE_SONAME(sin6); 1061 SCTP_INP_RUNLOCK(inp); 1062 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1063 return (ENOENT); 1064 } 1065 } 1066 SCTP_INP_RUNLOCK(inp); 1067 /* Scoping things for v6 */ 1068 if ((error = sa6_recoverscope(sin6)) != 0) { 1069 SCTP_FREE_SONAME(sin6); 1070 return (error); 1071 } 1072 (*addr) = (struct sockaddr *)sin6; 1073 return (0); 1074} 1075 1076static int 1077sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1078{ 1079 struct sockaddr_in6 *sin6; 1080 int fnd; 1081 struct sockaddr_in6 *sin_a6; 1082 struct sctp_inpcb *inp; 1083 struct sctp_tcb *stcb; 1084 struct sctp_nets *net; 1085 int error; 1086 1087 /* Do the malloc first in case it blocks. */ 1088 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1089 if (sin6 == NULL) 1090 return (ENOMEM); 1091 sin6->sin6_family = AF_INET6; 1092 sin6->sin6_len = sizeof(*sin6); 1093 1094 inp = (struct sctp_inpcb *)so->so_pcb; 1095 if ((inp == NULL) || 1096 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1097 /* UDP type and listeners will drop out here */ 1098 SCTP_FREE_SONAME(sin6); 1099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1100 return (ENOTCONN); 1101 } 1102 SCTP_INP_RLOCK(inp); 1103 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1104 if (stcb) { 1105 SCTP_TCB_LOCK(stcb); 1106 } 1107 SCTP_INP_RUNLOCK(inp); 1108 if (stcb == NULL) { 1109 SCTP_FREE_SONAME(sin6); 1110 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1111 return (ECONNRESET); 1112 } 1113 fnd = 0; 1114 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1115 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1116 if (sin_a6->sin6_family == AF_INET6) { 1117 fnd = 1; 1118 sin6->sin6_port = stcb->rport; 1119 sin6->sin6_addr = sin_a6->sin6_addr; 1120 break; 1121 } 1122 } 1123 SCTP_TCB_UNLOCK(stcb); 1124 if (!fnd) { 1125 /* No IPv4 address */ 1126 SCTP_FREE_SONAME(sin6); 1127 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1128 return (ENOENT); 1129 } 1130 if ((error = sa6_recoverscope(sin6)) != 0) { 1131 SCTP_FREE_SONAME(sin6); 1132 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1133 return (error); 1134 } 1135 *addr = (struct sockaddr *)sin6; 1136 return (0); 1137} 1138 1139static int 1140sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1141{ 1142#ifdef INET 1143 struct sockaddr *addr; 1144 1145#endif 1146 struct in6pcb *inp6 = sotoin6pcb(so); 1147 int error; 1148 1149 if (inp6 == NULL) { 1150 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1151 return (EINVAL); 1152 } 1153 /* allow v6 addresses precedence */ 1154 error = sctp6_getaddr(so, nam); 1155#ifdef INET 1156 if (error) { 1157 /* try v4 next if v6 failed */ 1158 error = sctp_ingetaddr(so, nam); 1159 if (error) { 1160 return (error); 1161 } 1162 addr = *nam; 1163 /* if I'm V6ONLY, convert it to v4-mapped */ 1164 if (SCTP_IPV6_V6ONLY(inp6)) { 1165 struct sockaddr_in6 sin6; 1166 1167 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1168 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1169 } 1170 } 1171#endif 1172 return (error); 1173} 1174 1175 1176static int 1177sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1178{ 1179#ifdef INET 1180 struct sockaddr *addr; 1181 1182#endif 1183 struct in6pcb *inp6 = sotoin6pcb(so); 1184 int error; 1185 1186 if (inp6 == NULL) { 1187 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1188 return (EINVAL); 1189 } 1190 /* allow v6 addresses precedence */ 1191 error = sctp6_peeraddr(so, nam); 1192#ifdef INET 1193 if (error) { 1194 /* try v4 next if v6 failed */ 1195 error = sctp_peeraddr(so, nam); 1196 if (error) { 1197 return (error); 1198 } 1199 addr = *nam; 1200 /* if I'm V6ONLY, convert it to v4-mapped */ 1201 if (SCTP_IPV6_V6ONLY(inp6)) { 1202 struct sockaddr_in6 sin6; 1203 1204 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1205 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1206 } 1207 } 1208#endif 1209 return (error); 1210} 1211 1212struct pr_usrreqs sctp6_usrreqs = { 1213 .pru_abort = sctp6_abort, 1214 .pru_accept = sctp_accept, 1215 .pru_attach = sctp6_attach, 1216 .pru_bind = sctp6_bind, 1217 .pru_connect = sctp6_connect, 1218 .pru_control = in6_control, 1219 .pru_close = sctp6_close, 1220 .pru_detach = sctp6_close, 1221 .pru_sopoll = sopoll_generic, 1222 .pru_flush = sctp_flush, 1223 .pru_disconnect = sctp6_disconnect, 1224 .pru_listen = sctp_listen, 1225 .pru_peeraddr = sctp6_getpeeraddr, 1226 .pru_send = sctp6_send, 1227 .pru_shutdown = sctp_shutdown, 1228 .pru_sockaddr = sctp6_in6getaddr, 1229 .pru_sosend = sctp_sosend, 1230 .pru_soreceive = sctp_soreceive 1231}; 1232 1233#endif 1234