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("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #ifdef INET6 38 #include <sys/proc.h> 39 #include <netinet/sctp_pcb.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctp_var.h> 42 #ifdef INET6 43 #include <netinet6/sctp6_var.h> 44 #endif 45 #include <netinet/sctp_sysctl.h> 46 #include <netinet/sctp_output.h> 47 #include <netinet/sctp_uio.h> 48 #include <netinet/sctp_asconf.h> 49 #include <netinet/sctputil.h> 50 #include <netinet/sctp_indata.h> 51 #include <netinet/sctp_timer.h> 52 #include <netinet/sctp_auth.h> 53 #include <netinet/sctp_input.h> 54 #include <netinet/sctp_output.h> 55 #include <netinet/sctp_bsd_addr.h> 56 #include <netinet/sctp_crc32.h> 57 #include <netinet/udp.h> 58 59 #ifdef IPSEC 60 #include <netipsec/ipsec.h> 61 #ifdef INET6 62 #include <netipsec/ipsec6.h> 63 #endif /* INET6 */ 64 #endif /* IPSEC */ 65 66 extern struct protosw inetsw[]; 67 68 int 69 sctp6_input_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 sctp_log_mbc(m, SCTP_MBUF_INPUT); 98 } 99 #endif 100 #ifdef SCTP_PACKET_LOGGING 101 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 102 sctp_packet_log(m); 103 } 104 #endif 105 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 106 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 107 m->m_pkthdr.len, 108 if_name(m->m_pkthdr.rcvif), 109 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 110 mflowid = m->m_pkthdr.flowid; 111 mflowtype = M_HASHTYPE_GET(m); 112 SCTP_STAT_INCR(sctps_recvpackets); 113 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 114 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 115 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 116 ip6 = mtod(m, struct ip6_hdr *); 117 IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen, 118 (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr))); 119 if (sh == NULL) { 120 SCTP_STAT_INCR(sctps_hdrops); 121 return (IPPROTO_DONE); 122 } 123 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 124 offset -= sizeof(struct sctp_chunkhdr); 125 memset(&src, 0, sizeof(struct sockaddr_in6)); 126 src.sin6_family = AF_INET6; 127 src.sin6_len = sizeof(struct sockaddr_in6); 128 src.sin6_port = sh->src_port; 129 src.sin6_addr = ip6->ip6_src; 130 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 131 goto out; 132 } 133 memset(&dst, 0, sizeof(struct sockaddr_in6)); 134 dst.sin6_family = AF_INET6; 135 dst.sin6_len = sizeof(struct sockaddr_in6); 136 dst.sin6_port = sh->dest_port; 137 dst.sin6_addr = ip6->ip6_dst; 138 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 139 goto out; 140 } 141 length = ntohs(ip6->ip6_plen) + iphlen; 142 /* Validate mbuf chain length with IP payload length. */ 143 if (SCTP_HEADER_LEN(m) != length) { 144 SCTPDBG(SCTP_DEBUG_INPUT1, 145 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 146 SCTP_STAT_INCR(sctps_hdrops); 147 goto out; 148 } 149 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 150 goto out; 151 } 152 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 153 #if defined(SCTP_WITH_NO_CSUM) 154 SCTP_STAT_INCR(sctps_recvnocrc); 155 #else 156 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 157 SCTP_STAT_INCR(sctps_recvhwcrc); 158 compute_crc = 0; 159 } else { 160 SCTP_STAT_INCR(sctps_recvswcrc); 161 compute_crc = 1; 162 } 163 #endif 164 sctp_common_input_processing(&m, iphlen, offset, length, 165 (struct sockaddr *)&src, 166 (struct sockaddr *)&dst, 167 sh, ch, 168 #if !defined(SCTP_WITH_NO_CSUM) 169 compute_crc, 170 #endif 171 ecn_bits, 172 mflowtype, mflowid, 173 vrf_id, port); 174 out: 175 if (m) { 176 sctp_m_freem(m); 177 } 178 return (IPPROTO_DONE); 179 } 180 181 182 int 183 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 184 { 185 return (sctp6_input_with_port(i_pak, offp, 0)); 186 } 187 188 static void 189 sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 190 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 191 { 192 uint32_t nxtsz; 193 194 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 195 (icmp6 == NULL) || (sh == NULL)) { 196 goto out; 197 } 198 /* First do we even look at it? */ 199 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 200 goto out; 201 202 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 203 /* not PACKET TO BIG */ 204 goto out; 205 } 206 /* 207 * ok we need to look closely. We could even get smarter and look at 208 * anyone that we sent to in case we get a different ICMP that tells 209 * us there is no way to reach a host, but for this impl, all we 210 * care about is MTU discovery. 211 */ 212 nxtsz = ntohl(icmp6->icmp6_mtu); 213 /* Stop any PMTU timer */ 214 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, 215 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 216 217 /* Adjust destination size limit */ 218 if (net->mtu > nxtsz) { 219 net->mtu = nxtsz; 220 if (net->port) { 221 net->mtu -= sizeof(struct udphdr); 222 } 223 } 224 /* now what about the ep? */ 225 if (stcb->asoc.smallest_mtu > nxtsz) { 226 struct sctp_tmit_chunk *chk; 227 228 /* Adjust that too */ 229 stcb->asoc.smallest_mtu = nxtsz; 230 /* now off to subtract IP_DF flag if needed */ 231 232 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 233 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 234 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 235 } 236 } 237 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 238 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 239 /* 240 * For this guy we also mark for immediate 241 * resend since we sent to big of chunk 242 */ 243 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 244 if (chk->sent != SCTP_DATAGRAM_RESEND) 245 stcb->asoc.sent_queue_retran_cnt++; 246 chk->sent = SCTP_DATAGRAM_RESEND; 247 chk->rec.data.doing_fast_retransmit = 0; 248 249 chk->sent = SCTP_DATAGRAM_RESEND; 250 /* Clear any time so NO RTT is being done */ 251 chk->sent_rcv_time.tv_sec = 0; 252 chk->sent_rcv_time.tv_usec = 0; 253 stcb->asoc.total_flight -= chk->send_size; 254 net->flight_size -= chk->send_size; 255 } 256 } 257 } 258 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 259 out: 260 if (stcb) { 261 SCTP_TCB_UNLOCK(stcb); 262 } 263 } 264 265 266 void 267 sctp6_notify(struct sctp_inpcb *inp, 268 struct icmp6_hdr *icmph, 269 struct sctphdr *sh, 270 struct sockaddr *to, 271 struct sctp_tcb *stcb, 272 struct sctp_nets *net) 273 { 274 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 275 struct socket *so; 276 277 #endif 278 279 /* protection */ 280 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 281 (sh == NULL) || (to == NULL)) { 282 if (stcb) 283 SCTP_TCB_UNLOCK(stcb); 284 return; 285 } 286 /* First job is to verify the vtag matches what I would send */ 287 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 288 SCTP_TCB_UNLOCK(stcb); 289 return; 290 } 291 if (icmph->icmp6_type != ICMP_UNREACH) { 292 /* We only care about unreachable */ 293 SCTP_TCB_UNLOCK(stcb); 294 return; 295 } 296 if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 297 (icmph->icmp6_code == ICMP_UNREACH_HOST) || 298 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 299 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 300 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 301 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 302 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 303 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 304 305 /* 306 * Hmm reachablity problems we must examine closely. If its 307 * not reachable, we may have lost a network. Or if there is 308 * NO protocol at the other end named SCTP. well we consider 309 * it a OOTB abort. 310 */ 311 if (net->dest_state & SCTP_ADDR_REACHABLE) { 312 /* Ok that destination is NOT reachable */ 313 net->dest_state &= ~SCTP_ADDR_REACHABLE; 314 net->dest_state &= ~SCTP_ADDR_PF; 315 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 316 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 317 } 318 SCTP_TCB_UNLOCK(stcb); 319 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 320 (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 321 /* 322 * Here the peer is either playing tricks on us, including 323 * an address that belongs to someone who does not support 324 * SCTP OR was a userland implementation that shutdown and 325 * now is dead. In either case treat it like a OOTB abort 326 * with no TCB 327 */ 328 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 329 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 330 so = SCTP_INP_SO(inp); 331 atomic_add_int(&stcb->asoc.refcnt, 1); 332 SCTP_TCB_UNLOCK(stcb); 333 SCTP_SOCKET_LOCK(so, 1); 334 SCTP_TCB_LOCK(stcb); 335 atomic_subtract_int(&stcb->asoc.refcnt, 1); 336 #endif 337 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 338 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 339 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 340 SCTP_SOCKET_UNLOCK(so, 1); 341 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 342 #endif 343 /* no need to unlock here, since the TCB is gone */ 344 } else { 345 SCTP_TCB_UNLOCK(stcb); 346 } 347 } 348 349 350 351 void 352 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 353 { 354 struct sctphdr sh; 355 struct ip6ctlparam *ip6cp = NULL; 356 uint32_t vrf_id; 357 358 vrf_id = SCTP_DEFAULT_VRFID; 359 360 if (pktdst->sa_family != AF_INET6 || 361 pktdst->sa_len != sizeof(struct sockaddr_in6)) 362 return; 363 364 if ((unsigned)cmd >= PRC_NCMDS) 365 return; 366 if (PRC_IS_REDIRECT(cmd)) { 367 d = NULL; 368 } else if (inet6ctlerrmap[cmd] == 0) { 369 return; 370 } 371 /* if the parameter is from icmp6, decode it. */ 372 if (d != NULL) { 373 ip6cp = (struct ip6ctlparam *)d; 374 } else { 375 ip6cp = (struct ip6ctlparam *)NULL; 376 } 377 378 if (ip6cp) { 379 /* 380 * XXX: We assume that when IPV6 is non NULL, M and OFF are 381 * valid. 382 */ 383 /* check if we can safely examine src and dst ports */ 384 struct sctp_inpcb *inp = NULL; 385 struct sctp_tcb *stcb = NULL; 386 struct sctp_nets *net = NULL; 387 struct sockaddr_in6 final; 388 389 if (ip6cp->ip6c_m == NULL) 390 return; 391 392 bzero(&sh, sizeof(sh)); 393 bzero(&final, sizeof(final)); 394 inp = NULL; 395 net = NULL; 396 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 397 (caddr_t)&sh); 398 ip6cp->ip6c_src->sin6_port = sh.src_port; 399 final.sin6_len = sizeof(final); 400 final.sin6_family = AF_INET6; 401 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 402 final.sin6_port = sh.dest_port; 403 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 404 (struct sockaddr *)ip6cp->ip6c_src, 405 &inp, &net, 1, vrf_id); 406 /* inp's ref-count increased && stcb locked */ 407 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 408 if (cmd == PRC_MSGSIZE) { 409 sctp6_notify_mbuf(inp, 410 ip6cp->ip6c_icmp6, 411 &sh, 412 stcb, 413 net); 414 /* inp's ref-count reduced && stcb unlocked */ 415 } else { 416 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 417 (struct sockaddr *)&final, 418 stcb, net); 419 /* inp's ref-count reduced && stcb unlocked */ 420 } 421 } else { 422 if (PRC_IS_REDIRECT(cmd) && inp) { 423 in6_rtchange((struct in6pcb *)inp, 424 inet6ctlerrmap[cmd]); 425 } 426 if (inp) { 427 /* reduce inp's ref-count */ 428 SCTP_INP_WLOCK(inp); 429 SCTP_INP_DECR_REF(inp); 430 SCTP_INP_WUNLOCK(inp); 431 } 432 if (stcb) 433 SCTP_TCB_UNLOCK(stcb); 434 } 435 } 436 } 437 438 /* 439 * this routine can probably be collasped into the one in sctp_userreq.c 440 * since they do the same thing and now we lookup with a sockaddr 441 */ 442 static int 443 sctp6_getcred(SYSCTL_HANDLER_ARGS) 444 { 445 struct xucred xuc; 446 struct sockaddr_in6 addrs[2]; 447 struct sctp_inpcb *inp; 448 struct sctp_nets *net; 449 struct sctp_tcb *stcb; 450 int error; 451 uint32_t vrf_id; 452 453 vrf_id = SCTP_DEFAULT_VRFID; 454 455 error = priv_check(req->td, PRIV_NETINET_GETCRED); 456 if (error) 457 return (error); 458 459 if (req->newlen != sizeof(addrs)) { 460 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 461 return (EINVAL); 462 } 463 if (req->oldlen != sizeof(struct ucred)) { 464 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 465 return (EINVAL); 466 } 467 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 468 if (error) 469 return (error); 470 471 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 472 sin6tosa(&addrs[0]), 473 &inp, &net, 1, vrf_id); 474 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 475 if ((inp != NULL) && (stcb == NULL)) { 476 /* reduce ref-count */ 477 SCTP_INP_WLOCK(inp); 478 SCTP_INP_DECR_REF(inp); 479 goto cred_can_cont; 480 } 481 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 482 error = ENOENT; 483 goto out; 484 } 485 SCTP_TCB_UNLOCK(stcb); 486 /* 487 * We use the write lock here, only since in the error leg we need 488 * it. If we used RLOCK, then we would have to 489 * wlock/decr/unlock/rlock. Which in theory could create a hole. 490 * Better to use higher wlock. 491 */ 492 SCTP_INP_WLOCK(inp); 493 cred_can_cont: 494 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 495 if (error) { 496 SCTP_INP_WUNLOCK(inp); 497 goto out; 498 } 499 cru2x(inp->sctp_socket->so_cred, &xuc); 500 SCTP_INP_WUNLOCK(inp); 501 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 502 out: 503 return (error); 504 } 505 506 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 507 0, 0, 508 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 509 510 511 /* This is the same as the sctp_abort() could be made common */ 512 static void 513 sctp6_abort(struct socket *so) 514 { 515 struct sctp_inpcb *inp; 516 uint32_t flags; 517 518 inp = (struct sctp_inpcb *)so->so_pcb; 519 if (inp == NULL) { 520 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 521 return; 522 } 523 sctp_must_try_again: 524 flags = inp->sctp_flags; 525 #ifdef SCTP_LOG_CLOSING 526 sctp_log_closing(inp, NULL, 17); 527 #endif 528 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 529 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 530 #ifdef SCTP_LOG_CLOSING 531 sctp_log_closing(inp, NULL, 16); 532 #endif 533 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 534 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 535 SOCK_LOCK(so); 536 SCTP_SB_CLEAR(so->so_snd); 537 /* 538 * same for the rcv ones, they are only here for the 539 * accounting/select. 540 */ 541 SCTP_SB_CLEAR(so->so_rcv); 542 /* Now null out the reference, we are completely detached. */ 543 so->so_pcb = NULL; 544 SOCK_UNLOCK(so); 545 } else { 546 flags = inp->sctp_flags; 547 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 548 goto sctp_must_try_again; 549 } 550 } 551 return; 552 } 553 554 static int 555 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 556 { 557 struct in6pcb *inp6; 558 int error; 559 struct sctp_inpcb *inp; 560 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 561 562 inp = (struct sctp_inpcb *)so->so_pcb; 563 if (inp != NULL) { 564 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 565 return (EINVAL); 566 } 567 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 568 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 569 if (error) 570 return (error); 571 } 572 error = sctp_inpcb_alloc(so, vrf_id); 573 if (error) 574 return (error); 575 inp = (struct sctp_inpcb *)so->so_pcb; 576 SCTP_INP_WLOCK(inp); 577 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 578 inp6 = (struct in6pcb *)inp; 579 580 inp6->inp_vflag |= INP_IPV6; 581 inp6->in6p_hops = -1; /* use kernel default */ 582 inp6->in6p_cksum = -1; /* just to be sure */ 583 #ifdef INET 584 /* 585 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 586 * socket as well, because the socket may be bound to an IPv6 587 * wildcard address, which may match an IPv4-mapped IPv6 address. 588 */ 589 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 590 #endif 591 /* 592 * Hmm what about the IPSEC stuff that is missing here but in 593 * sctp_attach()? 594 */ 595 SCTP_INP_WUNLOCK(inp); 596 return (0); 597 } 598 599 static int 600 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 601 { 602 struct sctp_inpcb *inp; 603 struct in6pcb *inp6; 604 int error; 605 606 inp = (struct sctp_inpcb *)so->so_pcb; 607 if (inp == NULL) { 608 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 609 return (EINVAL); 610 } 611 if (addr) { 612 switch (addr->sa_family) { 613 #ifdef INET 614 case AF_INET: 615 if (addr->sa_len != sizeof(struct sockaddr_in)) { 616 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 617 return (EINVAL); 618 } 619 break; 620 #endif 621 #ifdef INET6 622 case AF_INET6: 623 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 624 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 625 return (EINVAL); 626 } 627 break; 628 #endif 629 default: 630 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 631 return (EINVAL); 632 } 633 } 634 inp6 = (struct in6pcb *)inp; 635 inp6->inp_vflag &= ~INP_IPV4; 636 inp6->inp_vflag |= INP_IPV6; 637 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 638 switch (addr->sa_family) { 639 #ifdef INET 640 case AF_INET: 641 /* binding v4 addr to v6 socket, so reset flags */ 642 inp6->inp_vflag |= INP_IPV4; 643 inp6->inp_vflag &= ~INP_IPV6; 644 break; 645 #endif 646 #ifdef INET6 647 case AF_INET6: 648 { 649 struct sockaddr_in6 *sin6_p; 650 651 sin6_p = (struct sockaddr_in6 *)addr; 652 653 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 654 inp6->inp_vflag |= INP_IPV4; 655 } 656 #ifdef INET 657 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 658 struct sockaddr_in sin; 659 660 in6_sin6_2_sin(&sin, sin6_p); 661 inp6->inp_vflag |= INP_IPV4; 662 inp6->inp_vflag &= ~INP_IPV6; 663 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 664 return (error); 665 } 666 #endif 667 break; 668 } 669 #endif 670 default: 671 break; 672 } 673 } else if (addr != NULL) { 674 struct sockaddr_in6 *sin6_p; 675 676 /* IPV6_V6ONLY socket */ 677 #ifdef INET 678 if (addr->sa_family == AF_INET) { 679 /* can't bind v4 addr to v6 only socket! */ 680 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 681 return (EINVAL); 682 } 683 #endif 684 sin6_p = (struct sockaddr_in6 *)addr; 685 686 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 687 /* can't bind v4-mapped addrs either! */ 688 /* NOTE: we don't support SIIT */ 689 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 690 return (EINVAL); 691 } 692 } 693 error = sctp_inpcb_bind(so, addr, NULL, p); 694 return (error); 695 } 696 697 698 static void 699 sctp6_close(struct socket *so) 700 { 701 sctp_close(so); 702 } 703 704 /* This could be made common with sctp_detach() since they are identical */ 705 706 static 707 int 708 sctp6_disconnect(struct socket *so) 709 { 710 return (sctp_disconnect(so)); 711 } 712 713 714 int 715 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 716 struct mbuf *control, struct thread *p); 717 718 719 static int 720 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 721 struct mbuf *control, struct thread *p) 722 { 723 struct sctp_inpcb *inp; 724 struct in6pcb *inp6; 725 726 #ifdef INET 727 struct sockaddr_in6 *sin6; 728 729 #endif /* INET */ 730 /* No SPL needed since sctp_output does this */ 731 732 inp = (struct sctp_inpcb *)so->so_pcb; 733 if (inp == NULL) { 734 if (control) { 735 SCTP_RELEASE_PKT(control); 736 control = NULL; 737 } 738 SCTP_RELEASE_PKT(m); 739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 740 return (EINVAL); 741 } 742 inp6 = (struct in6pcb *)inp; 743 /* 744 * For the TCP model we may get a NULL addr, if we are a connected 745 * socket thats ok. 746 */ 747 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 748 (addr == NULL)) { 749 goto connected_type; 750 } 751 if (addr == NULL) { 752 SCTP_RELEASE_PKT(m); 753 if (control) { 754 SCTP_RELEASE_PKT(control); 755 control = NULL; 756 } 757 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 758 return (EDESTADDRREQ); 759 } 760 #ifdef INET 761 sin6 = (struct sockaddr_in6 *)addr; 762 if (SCTP_IPV6_V6ONLY(inp6)) { 763 /* 764 * if IPV6_V6ONLY flag, we discard datagrams destined to a 765 * v4 addr or v4-mapped addr 766 */ 767 if (addr->sa_family == AF_INET) { 768 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 769 return (EINVAL); 770 } 771 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 772 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 773 return (EINVAL); 774 } 775 } 776 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 777 struct sockaddr_in sin; 778 779 /* convert v4-mapped into v4 addr and send */ 780 in6_sin6_2_sin(&sin, sin6); 781 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 782 } 783 #endif /* INET */ 784 connected_type: 785 /* now what about control */ 786 if (control) { 787 if (inp->control) { 788 SCTP_PRINTF("huh? control set?\n"); 789 SCTP_RELEASE_PKT(inp->control); 790 inp->control = NULL; 791 } 792 inp->control = control; 793 } 794 /* Place the data */ 795 if (inp->pkt) { 796 SCTP_BUF_NEXT(inp->pkt_last) = m; 797 inp->pkt_last = m; 798 } else { 799 inp->pkt_last = inp->pkt = m; 800 } 801 if ( 802 /* FreeBSD and MacOSX uses a flag passed */ 803 ((flags & PRUS_MORETOCOME) == 0) 804 ) { 805 /* 806 * note with the current version this code will only be used 807 * by OpenBSD, NetBSD and FreeBSD have methods for 808 * re-defining sosend() to use sctp_sosend(). One can 809 * optionaly switch back to this code (by changing back the 810 * defininitions but this is not advisable. 811 */ 812 int ret; 813 814 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 815 inp->pkt = NULL; 816 inp->control = NULL; 817 return (ret); 818 } else { 819 return (0); 820 } 821 } 822 823 static int 824 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 825 { 826 uint32_t vrf_id; 827 int error = 0; 828 struct sctp_inpcb *inp; 829 struct sctp_tcb *stcb; 830 831 #ifdef INET 832 struct in6pcb *inp6; 833 struct sockaddr_in6 *sin6; 834 union sctp_sockstore store; 835 836 #endif 837 838 #ifdef INET 839 inp6 = (struct in6pcb *)so->so_pcb; 840 #endif 841 inp = (struct sctp_inpcb *)so->so_pcb; 842 if (inp == NULL) { 843 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 844 return (ECONNRESET); /* I made the same as TCP since we are 845 * not setup? */ 846 } 847 if (addr == NULL) { 848 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 849 return (EINVAL); 850 } 851 switch (addr->sa_family) { 852 #ifdef INET 853 case AF_INET: 854 if (addr->sa_len != sizeof(struct sockaddr_in)) { 855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 856 return (EINVAL); 857 } 858 break; 859 #endif 860 #ifdef INET6 861 case AF_INET6: 862 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 863 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 864 return (EINVAL); 865 } 866 break; 867 #endif 868 default: 869 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 870 return (EINVAL); 871 } 872 873 vrf_id = inp->def_vrf_id; 874 SCTP_ASOC_CREATE_LOCK(inp); 875 SCTP_INP_RLOCK(inp); 876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 877 SCTP_PCB_FLAGS_UNBOUND) { 878 /* Bind a ephemeral port */ 879 SCTP_INP_RUNLOCK(inp); 880 error = sctp6_bind(so, NULL, p); 881 if (error) { 882 SCTP_ASOC_CREATE_UNLOCK(inp); 883 884 return (error); 885 } 886 SCTP_INP_RLOCK(inp); 887 } 888 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 889 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 890 /* We are already connected AND the TCP model */ 891 SCTP_INP_RUNLOCK(inp); 892 SCTP_ASOC_CREATE_UNLOCK(inp); 893 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 894 return (EADDRINUSE); 895 } 896 #ifdef INET 897 sin6 = (struct sockaddr_in6 *)addr; 898 if (SCTP_IPV6_V6ONLY(inp6)) { 899 /* 900 * if IPV6_V6ONLY flag, ignore connections destined to a v4 901 * addr or v4-mapped addr 902 */ 903 if (addr->sa_family == AF_INET) { 904 SCTP_INP_RUNLOCK(inp); 905 SCTP_ASOC_CREATE_UNLOCK(inp); 906 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 907 return (EINVAL); 908 } 909 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 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 } 916 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 917 /* convert v4-mapped into v4 addr */ 918 in6_sin6_2_sin(&store.sin, sin6); 919 addr = &store.sa; 920 } 921 #endif /* INET */ 922 /* Now do we connect? */ 923 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 924 stcb = LIST_FIRST(&inp->sctp_asoc_list); 925 if (stcb) { 926 SCTP_TCB_UNLOCK(stcb); 927 } 928 SCTP_INP_RUNLOCK(inp); 929 } else { 930 SCTP_INP_RUNLOCK(inp); 931 SCTP_INP_WLOCK(inp); 932 SCTP_INP_INCR_REF(inp); 933 SCTP_INP_WUNLOCK(inp); 934 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 935 if (stcb == NULL) { 936 SCTP_INP_WLOCK(inp); 937 SCTP_INP_DECR_REF(inp); 938 SCTP_INP_WUNLOCK(inp); 939 } 940 } 941 942 if (stcb != NULL) { 943 /* Already have or am bring up an association */ 944 SCTP_ASOC_CREATE_UNLOCK(inp); 945 SCTP_TCB_UNLOCK(stcb); 946 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 947 return (EALREADY); 948 } 949 /* We are GOOD to go */ 950 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 951 SCTP_ASOC_CREATE_UNLOCK(inp); 952 if (stcb == NULL) { 953 /* Gak! no memory */ 954 return (error); 955 } 956 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 957 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 958 /* Set the connected flag so we can queue data */ 959 soisconnecting(so); 960 } 961 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 962 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 963 964 /* initialize authentication parameters for the assoc */ 965 sctp_initialize_auth_params(inp, stcb); 966 967 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 968 SCTP_TCB_UNLOCK(stcb); 969 return (error); 970 } 971 972 static int 973 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 974 { 975 struct sockaddr_in6 *sin6; 976 struct sctp_inpcb *inp; 977 uint32_t vrf_id; 978 struct sctp_ifa *sctp_ifa; 979 980 int error; 981 982 /* 983 * Do the malloc first in case it blocks. 984 */ 985 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 986 if (sin6 == NULL) 987 return (ENOMEM); 988 sin6->sin6_family = AF_INET6; 989 sin6->sin6_len = sizeof(*sin6); 990 991 inp = (struct sctp_inpcb *)so->so_pcb; 992 if (inp == NULL) { 993 SCTP_FREE_SONAME(sin6); 994 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 995 return (ECONNRESET); 996 } 997 SCTP_INP_RLOCK(inp); 998 sin6->sin6_port = inp->sctp_lport; 999 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1000 /* For the bound all case you get back 0 */ 1001 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1002 struct sctp_tcb *stcb; 1003 struct sockaddr_in6 *sin_a6; 1004 struct sctp_nets *net; 1005 int fnd; 1006 1007 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1008 if (stcb == NULL) { 1009 goto notConn6; 1010 } 1011 fnd = 0; 1012 sin_a6 = NULL; 1013 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1014 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1015 if (sin_a6 == NULL) 1016 /* this will make coverity happy */ 1017 continue; 1018 1019 if (sin_a6->sin6_family == AF_INET6) { 1020 fnd = 1; 1021 break; 1022 } 1023 } 1024 if ((!fnd) || (sin_a6 == NULL)) { 1025 /* punt */ 1026 goto notConn6; 1027 } 1028 vrf_id = inp->def_vrf_id; 1029 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1030 if (sctp_ifa) { 1031 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1032 } 1033 } else { 1034 /* For the bound all case you get back 0 */ 1035 notConn6: 1036 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1037 } 1038 } else { 1039 /* Take the first IPv6 address in the list */ 1040 struct sctp_laddr *laddr; 1041 int fnd = 0; 1042 1043 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1044 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1045 struct sockaddr_in6 *sin_a; 1046 1047 sin_a = &laddr->ifa->address.sin6; 1048 sin6->sin6_addr = sin_a->sin6_addr; 1049 fnd = 1; 1050 break; 1051 } 1052 } 1053 if (!fnd) { 1054 SCTP_FREE_SONAME(sin6); 1055 SCTP_INP_RUNLOCK(inp); 1056 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1057 return (ENOENT); 1058 } 1059 } 1060 SCTP_INP_RUNLOCK(inp); 1061 /* Scoping things for v6 */ 1062 if ((error = sa6_recoverscope(sin6)) != 0) { 1063 SCTP_FREE_SONAME(sin6); 1064 return (error); 1065 } 1066 (*addr) = (struct sockaddr *)sin6; 1067 return (0); 1068 } 1069 1070 static int 1071 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1072 { 1073 struct sockaddr_in6 *sin6; 1074 int fnd; 1075 struct sockaddr_in6 *sin_a6; 1076 struct sctp_inpcb *inp; 1077 struct sctp_tcb *stcb; 1078 struct sctp_nets *net; 1079 int error; 1080 1081 /* Do the malloc first in case it blocks. */ 1082 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1083 if (sin6 == NULL) 1084 return (ENOMEM); 1085 sin6->sin6_family = AF_INET6; 1086 sin6->sin6_len = sizeof(*sin6); 1087 1088 inp = (struct sctp_inpcb *)so->so_pcb; 1089 if ((inp == NULL) || 1090 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1091 /* UDP type and listeners will drop out here */ 1092 SCTP_FREE_SONAME(sin6); 1093 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1094 return (ENOTCONN); 1095 } 1096 SCTP_INP_RLOCK(inp); 1097 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1098 if (stcb) { 1099 SCTP_TCB_LOCK(stcb); 1100 } 1101 SCTP_INP_RUNLOCK(inp); 1102 if (stcb == NULL) { 1103 SCTP_FREE_SONAME(sin6); 1104 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1105 return (ECONNRESET); 1106 } 1107 fnd = 0; 1108 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1109 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1110 if (sin_a6->sin6_family == AF_INET6) { 1111 fnd = 1; 1112 sin6->sin6_port = stcb->rport; 1113 sin6->sin6_addr = sin_a6->sin6_addr; 1114 break; 1115 } 1116 } 1117 SCTP_TCB_UNLOCK(stcb); 1118 if (!fnd) { 1119 /* No IPv4 address */ 1120 SCTP_FREE_SONAME(sin6); 1121 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1122 return (ENOENT); 1123 } 1124 if ((error = sa6_recoverscope(sin6)) != 0) { 1125 SCTP_FREE_SONAME(sin6); 1126 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1127 return (error); 1128 } 1129 *addr = (struct sockaddr *)sin6; 1130 return (0); 1131 } 1132 1133 static int 1134 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1135 { 1136 #ifdef INET 1137 struct sockaddr *addr; 1138 1139 #endif 1140 struct in6pcb *inp6 = sotoin6pcb(so); 1141 int error; 1142 1143 if (inp6 == NULL) { 1144 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1145 return (EINVAL); 1146 } 1147 /* allow v6 addresses precedence */ 1148 error = sctp6_getaddr(so, nam); 1149 #ifdef INET 1150 if (error) { 1151 /* try v4 next if v6 failed */ 1152 error = sctp_ingetaddr(so, nam); 1153 if (error) { 1154 return (error); 1155 } 1156 addr = *nam; 1157 /* if I'm V6ONLY, convert it to v4-mapped */ 1158 if (SCTP_IPV6_V6ONLY(inp6)) { 1159 struct sockaddr_in6 sin6; 1160 1161 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1162 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1163 } 1164 } 1165 #endif 1166 return (error); 1167 } 1168 1169 1170 static int 1171 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1172 { 1173 #ifdef INET 1174 struct sockaddr *addr; 1175 1176 #endif 1177 struct in6pcb *inp6 = sotoin6pcb(so); 1178 int error; 1179 1180 if (inp6 == NULL) { 1181 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1182 return (EINVAL); 1183 } 1184 /* allow v6 addresses precedence */ 1185 error = sctp6_peeraddr(so, nam); 1186 #ifdef INET 1187 if (error) { 1188 /* try v4 next if v6 failed */ 1189 error = sctp_peeraddr(so, nam); 1190 if (error) { 1191 return (error); 1192 } 1193 addr = *nam; 1194 /* if I'm V6ONLY, convert it to v4-mapped */ 1195 if (SCTP_IPV6_V6ONLY(inp6)) { 1196 struct sockaddr_in6 sin6; 1197 1198 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1199 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1200 } 1201 } 1202 #endif 1203 return (error); 1204 } 1205 1206 struct pr_usrreqs sctp6_usrreqs = { 1207 .pru_abort = sctp6_abort, 1208 .pru_accept = sctp_accept, 1209 .pru_attach = sctp6_attach, 1210 .pru_bind = sctp6_bind, 1211 .pru_connect = sctp6_connect, 1212 .pru_control = in6_control, 1213 .pru_close = sctp6_close, 1214 .pru_detach = sctp6_close, 1215 .pru_sopoll = sopoll_generic, 1216 .pru_flush = sctp_flush, 1217 .pru_disconnect = sctp6_disconnect, 1218 .pru_listen = sctp_listen, 1219 .pru_peeraddr = sctp6_getpeeraddr, 1220 .pru_send = sctp6_send, 1221 .pru_shutdown = sctp_shutdown, 1222 .pru_sockaddr = sctp6_in6getaddr, 1223 .pru_sosend = sctp_sosend, 1224 .pru_soreceive = sctp_soreceive 1225 }; 1226 1227 #endif 1228