sctp6_usrreq.c revision 293897
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 293897 2016-01-14 09:11:42Z glebius $"); 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 struct sctp_inpcb *inp = NULL; 390 struct sctp_tcb *stcb = NULL; 391 struct sctp_nets *net = NULL; 392 struct sockaddr_in6 final; 393 394 if (ip6cp->ip6c_m == NULL) 395 return; 396 397 /* Check if we can safely examine the SCTP header. */ 398 if (ip6cp->ip6c_m->m_pkthdr.len < ip6cp->ip6c_off + sizeof(sh)) 399 return; 400 401 bzero(&sh, sizeof(sh)); 402 bzero(&final, sizeof(final)); 403 inp = NULL; 404 net = NULL; 405 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 406 (caddr_t)&sh); 407 ip6cp->ip6c_src->sin6_port = sh.src_port; 408 final.sin6_len = sizeof(final); 409 final.sin6_family = AF_INET6; 410 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 411 final.sin6_port = sh.dest_port; 412 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 413 (struct sockaddr *)ip6cp->ip6c_src, 414 &inp, &net, 1, vrf_id); 415 /* inp's ref-count increased && stcb locked */ 416 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 417 if (cmd == PRC_MSGSIZE) { 418 sctp6_notify_mbuf(inp, 419 ip6cp->ip6c_icmp6, 420 &sh, 421 stcb, 422 net); 423 /* inp's ref-count reduced && stcb unlocked */ 424 } else { 425 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 426 (struct sockaddr *)&final, 427 stcb, net); 428 /* inp's ref-count reduced && stcb unlocked */ 429 } 430 } else { 431 if (PRC_IS_REDIRECT(cmd) && inp) { 432 in6_rtchange((struct in6pcb *)inp, 433 inet6ctlerrmap[cmd]); 434 } 435 if (inp) { 436 /* reduce inp's ref-count */ 437 SCTP_INP_WLOCK(inp); 438 SCTP_INP_DECR_REF(inp); 439 SCTP_INP_WUNLOCK(inp); 440 } 441 if (stcb) 442 SCTP_TCB_UNLOCK(stcb); 443 } 444 } 445} 446 447/* 448 * this routine can probably be collasped into the one in sctp_userreq.c 449 * since they do the same thing and now we lookup with a sockaddr 450 */ 451static int 452sctp6_getcred(SYSCTL_HANDLER_ARGS) 453{ 454 struct xucred xuc; 455 struct sockaddr_in6 addrs[2]; 456 struct sctp_inpcb *inp; 457 struct sctp_nets *net; 458 struct sctp_tcb *stcb; 459 int error; 460 uint32_t vrf_id; 461 462 vrf_id = SCTP_DEFAULT_VRFID; 463 464 error = priv_check(req->td, PRIV_NETINET_GETCRED); 465 if (error) 466 return (error); 467 468 if (req->newlen != sizeof(addrs)) { 469 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 470 return (EINVAL); 471 } 472 if (req->oldlen != sizeof(struct ucred)) { 473 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 474 return (EINVAL); 475 } 476 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 477 if (error) 478 return (error); 479 480 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 481 sin6tosa(&addrs[0]), 482 &inp, &net, 1, vrf_id); 483 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 484 if ((inp != NULL) && (stcb == NULL)) { 485 /* reduce ref-count */ 486 SCTP_INP_WLOCK(inp); 487 SCTP_INP_DECR_REF(inp); 488 goto cred_can_cont; 489 } 490 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 491 error = ENOENT; 492 goto out; 493 } 494 SCTP_TCB_UNLOCK(stcb); 495 /* 496 * We use the write lock here, only since in the error leg we need 497 * it. If we used RLOCK, then we would have to 498 * wlock/decr/unlock/rlock. Which in theory could create a hole. 499 * Better to use higher wlock. 500 */ 501 SCTP_INP_WLOCK(inp); 502cred_can_cont: 503 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 504 if (error) { 505 SCTP_INP_WUNLOCK(inp); 506 goto out; 507 } 508 cru2x(inp->sctp_socket->so_cred, &xuc); 509 SCTP_INP_WUNLOCK(inp); 510 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 511out: 512 return (error); 513} 514 515SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 516 0, 0, 517 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 518 519 520/* This is the same as the sctp_abort() could be made common */ 521static void 522sctp6_abort(struct socket *so) 523{ 524 struct sctp_inpcb *inp; 525 uint32_t flags; 526 527 inp = (struct sctp_inpcb *)so->so_pcb; 528 if (inp == NULL) { 529 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 530 return; 531 } 532sctp_must_try_again: 533 flags = inp->sctp_flags; 534#ifdef SCTP_LOG_CLOSING 535 sctp_log_closing(inp, NULL, 17); 536#endif 537 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 538 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 539#ifdef SCTP_LOG_CLOSING 540 sctp_log_closing(inp, NULL, 16); 541#endif 542 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 543 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 544 SOCK_LOCK(so); 545 SCTP_SB_CLEAR(so->so_snd); 546 /* 547 * same for the rcv ones, they are only here for the 548 * accounting/select. 549 */ 550 SCTP_SB_CLEAR(so->so_rcv); 551 /* Now null out the reference, we are completely detached. */ 552 so->so_pcb = NULL; 553 SOCK_UNLOCK(so); 554 } else { 555 flags = inp->sctp_flags; 556 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 557 goto sctp_must_try_again; 558 } 559 } 560 return; 561} 562 563static int 564sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 565{ 566 struct in6pcb *inp6; 567 int error; 568 struct sctp_inpcb *inp; 569 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 570 571 inp = (struct sctp_inpcb *)so->so_pcb; 572 if (inp != NULL) { 573 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 574 return (EINVAL); 575 } 576 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 577 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 578 if (error) 579 return (error); 580 } 581 error = sctp_inpcb_alloc(so, vrf_id); 582 if (error) 583 return (error); 584 inp = (struct sctp_inpcb *)so->so_pcb; 585 SCTP_INP_WLOCK(inp); 586 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 587 inp6 = (struct in6pcb *)inp; 588 589 inp6->inp_vflag |= INP_IPV6; 590 inp6->in6p_hops = -1; /* use kernel default */ 591 inp6->in6p_cksum = -1; /* just to be sure */ 592#ifdef INET 593 /* 594 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 595 * socket as well, because the socket may be bound to an IPv6 596 * wildcard address, which may match an IPv4-mapped IPv6 address. 597 */ 598 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 599#endif 600 /* 601 * Hmm what about the IPSEC stuff that is missing here but in 602 * sctp_attach()? 603 */ 604 SCTP_INP_WUNLOCK(inp); 605 return (0); 606} 607 608static int 609sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 610{ 611 struct sctp_inpcb *inp; 612 struct in6pcb *inp6; 613 int error; 614 615 inp = (struct sctp_inpcb *)so->so_pcb; 616 if (inp == NULL) { 617 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 618 return (EINVAL); 619 } 620 if (addr) { 621 switch (addr->sa_family) { 622#ifdef INET 623 case AF_INET: 624 if (addr->sa_len != sizeof(struct sockaddr_in)) { 625 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 626 return (EINVAL); 627 } 628 break; 629#endif 630#ifdef INET6 631 case AF_INET6: 632 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 633 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 634 return (EINVAL); 635 } 636 break; 637#endif 638 default: 639 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 640 return (EINVAL); 641 } 642 } 643 inp6 = (struct in6pcb *)inp; 644 inp6->inp_vflag &= ~INP_IPV4; 645 inp6->inp_vflag |= INP_IPV6; 646 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 647 switch (addr->sa_family) { 648#ifdef INET 649 case AF_INET: 650 /* binding v4 addr to v6 socket, so reset flags */ 651 inp6->inp_vflag |= INP_IPV4; 652 inp6->inp_vflag &= ~INP_IPV6; 653 break; 654#endif 655#ifdef INET6 656 case AF_INET6: 657 { 658 struct sockaddr_in6 *sin6_p; 659 660 sin6_p = (struct sockaddr_in6 *)addr; 661 662 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 663 inp6->inp_vflag |= INP_IPV4; 664 } 665#ifdef INET 666 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 667 struct sockaddr_in sin; 668 669 in6_sin6_2_sin(&sin, sin6_p); 670 inp6->inp_vflag |= INP_IPV4; 671 inp6->inp_vflag &= ~INP_IPV6; 672 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 673 return (error); 674 } 675#endif 676 break; 677 } 678#endif 679 default: 680 break; 681 } 682 } else if (addr != NULL) { 683 struct sockaddr_in6 *sin6_p; 684 685 /* IPV6_V6ONLY socket */ 686#ifdef INET 687 if (addr->sa_family == AF_INET) { 688 /* can't bind v4 addr to v6 only socket! */ 689 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 690 return (EINVAL); 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 return (EINVAL); 700 } 701 } 702 error = sctp_inpcb_bind(so, addr, NULL, p); 703 return (error); 704} 705 706 707static void 708sctp6_close(struct socket *so) 709{ 710 sctp_close(so); 711} 712 713/* This could be made common with sctp_detach() since they are identical */ 714 715static 716int 717sctp6_disconnect(struct socket *so) 718{ 719 return (sctp_disconnect(so)); 720} 721 722 723int 724sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 725 struct mbuf *control, struct thread *p); 726 727 728static int 729sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 730 struct mbuf *control, struct thread *p) 731{ 732 struct sctp_inpcb *inp; 733 struct in6pcb *inp6; 734 735#ifdef INET 736 struct sockaddr_in6 *sin6; 737 738#endif /* INET */ 739 /* No SPL needed since sctp_output does this */ 740 741 inp = (struct sctp_inpcb *)so->so_pcb; 742 if (inp == NULL) { 743 if (control) { 744 SCTP_RELEASE_PKT(control); 745 control = NULL; 746 } 747 SCTP_RELEASE_PKT(m); 748 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 749 return (EINVAL); 750 } 751 inp6 = (struct in6pcb *)inp; 752 /* 753 * For the TCP model we may get a NULL addr, if we are a connected 754 * socket thats ok. 755 */ 756 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 757 (addr == NULL)) { 758 goto connected_type; 759 } 760 if (addr == NULL) { 761 SCTP_RELEASE_PKT(m); 762 if (control) { 763 SCTP_RELEASE_PKT(control); 764 control = NULL; 765 } 766 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 767 return (EDESTADDRREQ); 768 } 769#ifdef INET 770 sin6 = (struct sockaddr_in6 *)addr; 771 if (SCTP_IPV6_V6ONLY(inp6)) { 772 /* 773 * if IPV6_V6ONLY flag, we discard datagrams destined to a 774 * v4 addr or v4-mapped addr 775 */ 776 if (addr->sa_family == AF_INET) { 777 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 778 return (EINVAL); 779 } 780 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 781 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 782 return (EINVAL); 783 } 784 } 785 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 786 struct sockaddr_in sin; 787 788 /* convert v4-mapped into v4 addr and send */ 789 in6_sin6_2_sin(&sin, sin6); 790 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 791 } 792#endif /* INET */ 793connected_type: 794 /* now what about control */ 795 if (control) { 796 if (inp->control) { 797 SCTP_PRINTF("huh? control set?\n"); 798 SCTP_RELEASE_PKT(inp->control); 799 inp->control = NULL; 800 } 801 inp->control = control; 802 } 803 /* Place the data */ 804 if (inp->pkt) { 805 SCTP_BUF_NEXT(inp->pkt_last) = m; 806 inp->pkt_last = m; 807 } else { 808 inp->pkt_last = inp->pkt = m; 809 } 810 if ( 811 /* FreeBSD and MacOSX uses a flag passed */ 812 ((flags & PRUS_MORETOCOME) == 0) 813 ) { 814 /* 815 * note with the current version this code will only be used 816 * by OpenBSD, NetBSD and FreeBSD have methods for 817 * re-defining sosend() to use sctp_sosend(). One can 818 * optionaly switch back to this code (by changing back the 819 * defininitions but this is not advisable. 820 */ 821 int ret; 822 823 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 824 inp->pkt = NULL; 825 inp->control = NULL; 826 return (ret); 827 } else { 828 return (0); 829 } 830} 831 832static int 833sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 834{ 835 uint32_t vrf_id; 836 int error = 0; 837 struct sctp_inpcb *inp; 838 struct sctp_tcb *stcb; 839 840#ifdef INET 841 struct in6pcb *inp6; 842 struct sockaddr_in6 *sin6; 843 union sctp_sockstore store; 844 845#endif 846 847#ifdef INET 848 inp6 = (struct in6pcb *)so->so_pcb; 849#endif 850 inp = (struct sctp_inpcb *)so->so_pcb; 851 if (inp == NULL) { 852 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 853 return (ECONNRESET); /* I made the same as TCP since we are 854 * not setup? */ 855 } 856 if (addr == NULL) { 857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 858 return (EINVAL); 859 } 860 switch (addr->sa_family) { 861#ifdef INET 862 case AF_INET: 863 if (addr->sa_len != sizeof(struct sockaddr_in)) { 864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 865 return (EINVAL); 866 } 867 break; 868#endif 869#ifdef INET6 870 case AF_INET6: 871 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 872 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 873 return (EINVAL); 874 } 875 break; 876#endif 877 default: 878 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 879 return (EINVAL); 880 } 881 882 vrf_id = inp->def_vrf_id; 883 SCTP_ASOC_CREATE_LOCK(inp); 884 SCTP_INP_RLOCK(inp); 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 886 SCTP_PCB_FLAGS_UNBOUND) { 887 /* Bind a ephemeral port */ 888 SCTP_INP_RUNLOCK(inp); 889 error = sctp6_bind(so, NULL, p); 890 if (error) { 891 SCTP_ASOC_CREATE_UNLOCK(inp); 892 893 return (error); 894 } 895 SCTP_INP_RLOCK(inp); 896 } 897 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 898 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 899 /* We are already connected AND the TCP model */ 900 SCTP_INP_RUNLOCK(inp); 901 SCTP_ASOC_CREATE_UNLOCK(inp); 902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 903 return (EADDRINUSE); 904 } 905#ifdef INET 906 sin6 = (struct sockaddr_in6 *)addr; 907 if (SCTP_IPV6_V6ONLY(inp6)) { 908 /* 909 * if IPV6_V6ONLY flag, ignore connections destined to a v4 910 * addr or v4-mapped addr 911 */ 912 if (addr->sa_family == AF_INET) { 913 SCTP_INP_RUNLOCK(inp); 914 SCTP_ASOC_CREATE_UNLOCK(inp); 915 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 916 return (EINVAL); 917 } 918 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 919 SCTP_INP_RUNLOCK(inp); 920 SCTP_ASOC_CREATE_UNLOCK(inp); 921 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 922 return (EINVAL); 923 } 924 } 925 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 926 /* convert v4-mapped into v4 addr */ 927 in6_sin6_2_sin(&store.sin, sin6); 928 addr = &store.sa; 929 } 930#endif /* INET */ 931 /* Now do we connect? */ 932 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 933 stcb = LIST_FIRST(&inp->sctp_asoc_list); 934 if (stcb) { 935 SCTP_TCB_UNLOCK(stcb); 936 } 937 SCTP_INP_RUNLOCK(inp); 938 } else { 939 SCTP_INP_RUNLOCK(inp); 940 SCTP_INP_WLOCK(inp); 941 SCTP_INP_INCR_REF(inp); 942 SCTP_INP_WUNLOCK(inp); 943 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 944 if (stcb == NULL) { 945 SCTP_INP_WLOCK(inp); 946 SCTP_INP_DECR_REF(inp); 947 SCTP_INP_WUNLOCK(inp); 948 } 949 } 950 951 if (stcb != NULL) { 952 /* Already have or am bring up an association */ 953 SCTP_ASOC_CREATE_UNLOCK(inp); 954 SCTP_TCB_UNLOCK(stcb); 955 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 956 return (EALREADY); 957 } 958 /* We are GOOD to go */ 959 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 960 SCTP_ASOC_CREATE_UNLOCK(inp); 961 if (stcb == NULL) { 962 /* Gak! no memory */ 963 return (error); 964 } 965 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 966 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 967 /* Set the connected flag so we can queue data */ 968 soisconnecting(so); 969 } 970 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 971 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 972 973 /* initialize authentication parameters for the assoc */ 974 sctp_initialize_auth_params(inp, stcb); 975 976 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 977 SCTP_TCB_UNLOCK(stcb); 978 return (error); 979} 980 981static int 982sctp6_getaddr(struct socket *so, struct sockaddr **addr) 983{ 984 struct sockaddr_in6 *sin6; 985 struct sctp_inpcb *inp; 986 uint32_t vrf_id; 987 struct sctp_ifa *sctp_ifa; 988 989 int error; 990 991 /* 992 * Do the malloc first in case it blocks. 993 */ 994 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 995 if (sin6 == NULL) 996 return (ENOMEM); 997 sin6->sin6_family = AF_INET6; 998 sin6->sin6_len = sizeof(*sin6); 999 1000 inp = (struct sctp_inpcb *)so->so_pcb; 1001 if (inp == NULL) { 1002 SCTP_FREE_SONAME(sin6); 1003 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1004 return (ECONNRESET); 1005 } 1006 SCTP_INP_RLOCK(inp); 1007 sin6->sin6_port = inp->sctp_lport; 1008 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1009 /* For the bound all case you get back 0 */ 1010 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1011 struct sctp_tcb *stcb; 1012 struct sockaddr_in6 *sin_a6; 1013 struct sctp_nets *net; 1014 int fnd; 1015 1016 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1017 if (stcb == NULL) { 1018 goto notConn6; 1019 } 1020 fnd = 0; 1021 sin_a6 = NULL; 1022 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1023 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1024 if (sin_a6 == NULL) 1025 /* this will make coverity happy */ 1026 continue; 1027 1028 if (sin_a6->sin6_family == AF_INET6) { 1029 fnd = 1; 1030 break; 1031 } 1032 } 1033 if ((!fnd) || (sin_a6 == NULL)) { 1034 /* punt */ 1035 goto notConn6; 1036 } 1037 vrf_id = inp->def_vrf_id; 1038 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1039 if (sctp_ifa) { 1040 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1041 } 1042 } else { 1043 /* For the bound all case you get back 0 */ 1044 notConn6: 1045 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1046 } 1047 } else { 1048 /* Take the first IPv6 address in the list */ 1049 struct sctp_laddr *laddr; 1050 int fnd = 0; 1051 1052 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1053 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1054 struct sockaddr_in6 *sin_a; 1055 1056 sin_a = &laddr->ifa->address.sin6; 1057 sin6->sin6_addr = sin_a->sin6_addr; 1058 fnd = 1; 1059 break; 1060 } 1061 } 1062 if (!fnd) { 1063 SCTP_FREE_SONAME(sin6); 1064 SCTP_INP_RUNLOCK(inp); 1065 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1066 return (ENOENT); 1067 } 1068 } 1069 SCTP_INP_RUNLOCK(inp); 1070 /* Scoping things for v6 */ 1071 if ((error = sa6_recoverscope(sin6)) != 0) { 1072 SCTP_FREE_SONAME(sin6); 1073 return (error); 1074 } 1075 (*addr) = (struct sockaddr *)sin6; 1076 return (0); 1077} 1078 1079static int 1080sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1081{ 1082 struct sockaddr_in6 *sin6; 1083 int fnd; 1084 struct sockaddr_in6 *sin_a6; 1085 struct sctp_inpcb *inp; 1086 struct sctp_tcb *stcb; 1087 struct sctp_nets *net; 1088 int error; 1089 1090 /* Do the malloc first in case it blocks. */ 1091 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1092 if (sin6 == NULL) 1093 return (ENOMEM); 1094 sin6->sin6_family = AF_INET6; 1095 sin6->sin6_len = sizeof(*sin6); 1096 1097 inp = (struct sctp_inpcb *)so->so_pcb; 1098 if ((inp == NULL) || 1099 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1100 /* UDP type and listeners will drop out here */ 1101 SCTP_FREE_SONAME(sin6); 1102 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1103 return (ENOTCONN); 1104 } 1105 SCTP_INP_RLOCK(inp); 1106 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1107 if (stcb) { 1108 SCTP_TCB_LOCK(stcb); 1109 } 1110 SCTP_INP_RUNLOCK(inp); 1111 if (stcb == NULL) { 1112 SCTP_FREE_SONAME(sin6); 1113 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1114 return (ECONNRESET); 1115 } 1116 fnd = 0; 1117 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1118 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1119 if (sin_a6->sin6_family == AF_INET6) { 1120 fnd = 1; 1121 sin6->sin6_port = stcb->rport; 1122 sin6->sin6_addr = sin_a6->sin6_addr; 1123 break; 1124 } 1125 } 1126 SCTP_TCB_UNLOCK(stcb); 1127 if (!fnd) { 1128 /* No IPv4 address */ 1129 SCTP_FREE_SONAME(sin6); 1130 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1131 return (ENOENT); 1132 } 1133 if ((error = sa6_recoverscope(sin6)) != 0) { 1134 SCTP_FREE_SONAME(sin6); 1135 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1136 return (error); 1137 } 1138 *addr = (struct sockaddr *)sin6; 1139 return (0); 1140} 1141 1142static int 1143sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1144{ 1145#ifdef INET 1146 struct sockaddr *addr; 1147 1148#endif 1149 struct in6pcb *inp6 = sotoin6pcb(so); 1150 int error; 1151 1152 if (inp6 == NULL) { 1153 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1154 return (EINVAL); 1155 } 1156 /* allow v6 addresses precedence */ 1157 error = sctp6_getaddr(so, nam); 1158#ifdef INET 1159 if (error) { 1160 /* try v4 next if v6 failed */ 1161 error = sctp_ingetaddr(so, nam); 1162 if (error) { 1163 return (error); 1164 } 1165 addr = *nam; 1166 /* if I'm V6ONLY, convert it to v4-mapped */ 1167 if (SCTP_IPV6_V6ONLY(inp6)) { 1168 struct sockaddr_in6 sin6; 1169 1170 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1171 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1172 } 1173 } 1174#endif 1175 return (error); 1176} 1177 1178 1179static int 1180sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1181{ 1182#ifdef INET 1183 struct sockaddr *addr; 1184 1185#endif 1186 struct in6pcb *inp6 = sotoin6pcb(so); 1187 int error; 1188 1189 if (inp6 == NULL) { 1190 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1191 return (EINVAL); 1192 } 1193 /* allow v6 addresses precedence */ 1194 error = sctp6_peeraddr(so, nam); 1195#ifdef INET 1196 if (error) { 1197 /* try v4 next if v6 failed */ 1198 error = sctp_peeraddr(so, nam); 1199 if (error) { 1200 return (error); 1201 } 1202 addr = *nam; 1203 /* if I'm V6ONLY, convert it to v4-mapped */ 1204 if (SCTP_IPV6_V6ONLY(inp6)) { 1205 struct sockaddr_in6 sin6; 1206 1207 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1208 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1209 } 1210 } 1211#endif 1212 return (error); 1213} 1214 1215struct pr_usrreqs sctp6_usrreqs = { 1216 .pru_abort = sctp6_abort, 1217 .pru_accept = sctp_accept, 1218 .pru_attach = sctp6_attach, 1219 .pru_bind = sctp6_bind, 1220 .pru_connect = sctp6_connect, 1221 .pru_control = in6_control, 1222 .pru_close = sctp6_close, 1223 .pru_detach = sctp6_close, 1224 .pru_sopoll = sopoll_generic, 1225 .pru_flush = sctp_flush, 1226 .pru_disconnect = sctp6_disconnect, 1227 .pru_listen = sctp_listen, 1228 .pru_peeraddr = sctp6_getpeeraddr, 1229 .pru_send = sctp6_send, 1230 .pru_shutdown = sctp_shutdown, 1231 .pru_sockaddr = sctp6_in6getaddr, 1232 .pru_sosend = sctp_sosend, 1233 .pru_soreceive = sctp_soreceive 1234}; 1235 1236#endif 1237