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 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 length = ntohs(ip6->ip6_plen) + iphlen; 144 /* Validate mbuf chain length with IP payload length. */ 145 if (SCTP_HEADER_LEN(m) != length) { 146 SCTPDBG(SCTP_DEBUG_INPUT1, 147 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 148 SCTP_STAT_INCR(sctps_hdrops); 149 goto out; 150 } 151 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 152 goto out; 153 } 154 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 155 #if defined(SCTP_WITH_NO_CSUM) 156 SCTP_STAT_INCR(sctps_recvnocrc); 157 #else 158 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 159 SCTP_STAT_INCR(sctps_recvhwcrc); 160 compute_crc = 0; 161 } else { 162 SCTP_STAT_INCR(sctps_recvswcrc); 163 compute_crc = 1; 164 } 165 #endif 166 sctp_common_input_processing(&m, iphlen, offset, length, 167 (struct sockaddr *)&src, 168 (struct sockaddr *)&dst, 169 sh, ch, 170 #if !defined(SCTP_WITH_NO_CSUM) 171 compute_crc, 172 #endif 173 ecn_bits, 174 mflowtype, mflowid, fibnum, 175 vrf_id, port); 176 out: 177 if (m) { 178 sctp_m_freem(m); 179 } 180 return (IPPROTO_DONE); 181 } 182 183 184 int 185 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 186 { 187 return (sctp6_input_with_port(i_pak, offp, 0)); 188 } 189 190 static void 191 sctp6_notify_mbuf(struct sctp_inpcb *inp, struct icmp6_hdr *icmp6, 192 struct sctphdr *sh, struct sctp_tcb *stcb, struct sctp_nets *net) 193 { 194 uint32_t nxtsz; 195 196 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 197 (icmp6 == NULL) || (sh == NULL)) { 198 goto out; 199 } 200 /* First do we even look at it? */ 201 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 202 goto out; 203 204 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 205 /* not PACKET TO BIG */ 206 goto out; 207 } 208 /* 209 * ok we need to look closely. We could even get smarter and look at 210 * anyone that we sent to in case we get a different ICMP that tells 211 * us there is no way to reach a host, but for this impl, all we 212 * care about is MTU discovery. 213 */ 214 nxtsz = ntohl(icmp6->icmp6_mtu); 215 /* Stop any PMTU timer */ 216 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, 217 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 218 219 /* Adjust destination size limit */ 220 if (net->mtu > nxtsz) { 221 net->mtu = nxtsz; 222 if (net->port) { 223 net->mtu -= sizeof(struct udphdr); 224 } 225 } 226 /* now what about the ep? */ 227 if (stcb->asoc.smallest_mtu > nxtsz) { 228 struct sctp_tmit_chunk *chk; 229 230 /* Adjust that too */ 231 stcb->asoc.smallest_mtu = nxtsz; 232 /* now off to subtract IP_DF flag if needed */ 233 234 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 235 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 236 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 237 } 238 } 239 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 240 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 241 /* 242 * For this guy we also mark for immediate 243 * resend since we sent to big of chunk 244 */ 245 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 246 if (chk->sent != SCTP_DATAGRAM_RESEND) 247 stcb->asoc.sent_queue_retran_cnt++; 248 chk->sent = SCTP_DATAGRAM_RESEND; 249 chk->rec.data.doing_fast_retransmit = 0; 250 251 chk->sent = SCTP_DATAGRAM_RESEND; 252 /* Clear any time so NO RTT is being done */ 253 chk->sent_rcv_time.tv_sec = 0; 254 chk->sent_rcv_time.tv_usec = 0; 255 stcb->asoc.total_flight -= chk->send_size; 256 net->flight_size -= chk->send_size; 257 } 258 } 259 } 260 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 261 out: 262 if (stcb) { 263 SCTP_TCB_UNLOCK(stcb); 264 } 265 } 266 267 268 void 269 sctp6_notify(struct sctp_inpcb *inp, 270 struct icmp6_hdr *icmph, 271 struct sctphdr *sh, 272 struct sockaddr *to, 273 struct sctp_tcb *stcb, 274 struct sctp_nets *net) 275 { 276 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 277 struct socket *so; 278 279 #endif 280 281 /* protection */ 282 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 283 (sh == NULL) || (to == NULL)) { 284 if (stcb) 285 SCTP_TCB_UNLOCK(stcb); 286 return; 287 } 288 /* First job is to verify the vtag matches what I would send */ 289 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) { 290 SCTP_TCB_UNLOCK(stcb); 291 return; 292 } 293 if (icmph->icmp6_type != ICMP_UNREACH) { 294 /* We only care about unreachable */ 295 SCTP_TCB_UNLOCK(stcb); 296 return; 297 } 298 if ((icmph->icmp6_code == ICMP_UNREACH_NET) || 299 (icmph->icmp6_code == ICMP_UNREACH_HOST) || 300 (icmph->icmp6_code == ICMP_UNREACH_NET_UNKNOWN) || 301 (icmph->icmp6_code == ICMP_UNREACH_HOST_UNKNOWN) || 302 (icmph->icmp6_code == ICMP_UNREACH_ISOLATED) || 303 (icmph->icmp6_code == ICMP_UNREACH_NET_PROHIB) || 304 (icmph->icmp6_code == ICMP_UNREACH_HOST_PROHIB) || 305 (icmph->icmp6_code == ICMP_UNREACH_FILTER_PROHIB)) { 306 307 /* 308 * Hmm reachablity problems we must examine closely. If its 309 * not reachable, we may have lost a network. Or if there is 310 * NO protocol at the other end named SCTP. well we consider 311 * it a OOTB abort. 312 */ 313 if (net->dest_state & SCTP_ADDR_REACHABLE) { 314 /* Ok that destination is NOT reachable */ 315 net->dest_state &= ~SCTP_ADDR_REACHABLE; 316 net->dest_state &= ~SCTP_ADDR_PF; 317 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 318 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 319 } 320 SCTP_TCB_UNLOCK(stcb); 321 } else if ((icmph->icmp6_code == ICMP_UNREACH_PROTOCOL) || 322 (icmph->icmp6_code == ICMP_UNREACH_PORT)) { 323 /* 324 * Here the peer is either playing tricks on us, including 325 * an address that belongs to someone who does not support 326 * SCTP OR was a userland implementation that shutdown and 327 * now is dead. In either case treat it like a OOTB abort 328 * with no TCB 329 */ 330 sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED); 331 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 332 so = SCTP_INP_SO(inp); 333 atomic_add_int(&stcb->asoc.refcnt, 1); 334 SCTP_TCB_UNLOCK(stcb); 335 SCTP_SOCKET_LOCK(so, 1); 336 SCTP_TCB_LOCK(stcb); 337 atomic_subtract_int(&stcb->asoc.refcnt, 1); 338 #endif 339 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 340 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 341 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 342 SCTP_SOCKET_UNLOCK(so, 1); 343 /* SCTP_TCB_UNLOCK(stcb); MT: I think this is not needed. */ 344 #endif 345 /* no need to unlock here, since the TCB is gone */ 346 } else { 347 SCTP_TCB_UNLOCK(stcb); 348 } 349 } 350 351 352 353 void 354 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) 355 { 356 struct sctphdr sh; 357 struct ip6ctlparam *ip6cp = NULL; 358 uint32_t vrf_id; 359 360 vrf_id = SCTP_DEFAULT_VRFID; 361 362 if (pktdst->sa_family != AF_INET6 || 363 pktdst->sa_len != sizeof(struct sockaddr_in6)) 364 return; 365 366 if ((unsigned)cmd >= PRC_NCMDS) 367 return; 368 if (PRC_IS_REDIRECT(cmd)) { 369 d = NULL; 370 } else if (inet6ctlerrmap[cmd] == 0) { 371 return; 372 } 373 /* if the parameter is from icmp6, decode it. */ 374 if (d != NULL) { 375 ip6cp = (struct ip6ctlparam *)d; 376 } else { 377 ip6cp = (struct ip6ctlparam *)NULL; 378 } 379 380 if (ip6cp) { 381 /* 382 * XXX: We assume that when IPV6 is non NULL, M and OFF are 383 * valid. 384 */ 385 /* check if we can safely examine src and dst ports */ 386 struct sctp_inpcb *inp = NULL; 387 struct sctp_tcb *stcb = NULL; 388 struct sctp_nets *net = NULL; 389 struct sockaddr_in6 final; 390 391 if (ip6cp->ip6c_m == NULL) 392 return; 393 394 bzero(&sh, sizeof(sh)); 395 bzero(&final, sizeof(final)); 396 inp = NULL; 397 net = NULL; 398 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 399 (caddr_t)&sh); 400 ip6cp->ip6c_src->sin6_port = sh.src_port; 401 final.sin6_len = sizeof(final); 402 final.sin6_family = AF_INET6; 403 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 404 final.sin6_port = sh.dest_port; 405 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&final, 406 (struct sockaddr *)ip6cp->ip6c_src, 407 &inp, &net, 1, vrf_id); 408 /* inp's ref-count increased && stcb locked */ 409 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 410 if (cmd == PRC_MSGSIZE) { 411 sctp6_notify_mbuf(inp, 412 ip6cp->ip6c_icmp6, 413 &sh, 414 stcb, 415 net); 416 /* inp's ref-count reduced && stcb unlocked */ 417 } else { 418 sctp6_notify(inp, ip6cp->ip6c_icmp6, &sh, 419 (struct sockaddr *)&final, 420 stcb, net); 421 /* inp's ref-count reduced && stcb unlocked */ 422 } 423 } else { 424 if (PRC_IS_REDIRECT(cmd) && inp) { 425 in6_rtchange((struct in6pcb *)inp, 426 inet6ctlerrmap[cmd]); 427 } 428 if (inp) { 429 /* reduce inp's ref-count */ 430 SCTP_INP_WLOCK(inp); 431 SCTP_INP_DECR_REF(inp); 432 SCTP_INP_WUNLOCK(inp); 433 } 434 if (stcb) 435 SCTP_TCB_UNLOCK(stcb); 436 } 437 } 438 } 439 440 /* 441 * this routine can probably be collasped into the one in sctp_userreq.c 442 * since they do the same thing and now we lookup with a sockaddr 443 */ 444 static int 445 sctp6_getcred(SYSCTL_HANDLER_ARGS) 446 { 447 struct xucred xuc; 448 struct sockaddr_in6 addrs[2]; 449 struct sctp_inpcb *inp; 450 struct sctp_nets *net; 451 struct sctp_tcb *stcb; 452 int error; 453 uint32_t vrf_id; 454 455 vrf_id = SCTP_DEFAULT_VRFID; 456 457 error = priv_check(req->td, PRIV_NETINET_GETCRED); 458 if (error) 459 return (error); 460 461 if (req->newlen != sizeof(addrs)) { 462 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 463 return (EINVAL); 464 } 465 if (req->oldlen != sizeof(struct ucred)) { 466 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 467 return (EINVAL); 468 } 469 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 470 if (error) 471 return (error); 472 473 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 474 sin6tosa(&addrs[0]), 475 &inp, &net, 1, vrf_id); 476 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 477 if ((inp != NULL) && (stcb == NULL)) { 478 /* reduce ref-count */ 479 SCTP_INP_WLOCK(inp); 480 SCTP_INP_DECR_REF(inp); 481 goto cred_can_cont; 482 } 483 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 484 error = ENOENT; 485 goto out; 486 } 487 SCTP_TCB_UNLOCK(stcb); 488 /* 489 * We use the write lock here, only since in the error leg we need 490 * it. If we used RLOCK, then we would have to 491 * wlock/decr/unlock/rlock. Which in theory could create a hole. 492 * Better to use higher wlock. 493 */ 494 SCTP_INP_WLOCK(inp); 495 cred_can_cont: 496 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 497 if (error) { 498 SCTP_INP_WUNLOCK(inp); 499 goto out; 500 } 501 cru2x(inp->sctp_socket->so_cred, &xuc); 502 SCTP_INP_WUNLOCK(inp); 503 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 504 out: 505 return (error); 506 } 507 508 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 509 0, 0, 510 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 511 512 513 /* This is the same as the sctp_abort() could be made common */ 514 static void 515 sctp6_abort(struct socket *so) 516 { 517 struct sctp_inpcb *inp; 518 uint32_t flags; 519 520 inp = (struct sctp_inpcb *)so->so_pcb; 521 if (inp == NULL) { 522 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 523 return; 524 } 525 sctp_must_try_again: 526 flags = inp->sctp_flags; 527 #ifdef SCTP_LOG_CLOSING 528 sctp_log_closing(inp, NULL, 17); 529 #endif 530 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 531 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 532 #ifdef SCTP_LOG_CLOSING 533 sctp_log_closing(inp, NULL, 16); 534 #endif 535 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 536 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 537 SOCK_LOCK(so); 538 SCTP_SB_CLEAR(so->so_snd); 539 /* 540 * same for the rcv ones, they are only here for the 541 * accounting/select. 542 */ 543 SCTP_SB_CLEAR(so->so_rcv); 544 /* Now null out the reference, we are completely detached. */ 545 so->so_pcb = NULL; 546 SOCK_UNLOCK(so); 547 } else { 548 flags = inp->sctp_flags; 549 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 550 goto sctp_must_try_again; 551 } 552 } 553 return; 554 } 555 556 static int 557 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 558 { 559 struct in6pcb *inp6; 560 int error; 561 struct sctp_inpcb *inp; 562 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 563 564 inp = (struct sctp_inpcb *)so->so_pcb; 565 if (inp != NULL) { 566 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 567 return (EINVAL); 568 } 569 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 570 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 571 if (error) 572 return (error); 573 } 574 error = sctp_inpcb_alloc(so, vrf_id); 575 if (error) 576 return (error); 577 inp = (struct sctp_inpcb *)so->so_pcb; 578 SCTP_INP_WLOCK(inp); 579 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 580 inp6 = (struct in6pcb *)inp; 581 582 inp6->inp_vflag |= INP_IPV6; 583 inp6->in6p_hops = -1; /* use kernel default */ 584 inp6->in6p_cksum = -1; /* just to be sure */ 585 #ifdef INET 586 /* 587 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 588 * socket as well, because the socket may be bound to an IPv6 589 * wildcard address, which may match an IPv4-mapped IPv6 address. 590 */ 591 inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 592 #endif 593 /* 594 * Hmm what about the IPSEC stuff that is missing here but in 595 * sctp_attach()? 596 */ 597 SCTP_INP_WUNLOCK(inp); 598 return (0); 599 } 600 601 static int 602 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 603 { 604 struct sctp_inpcb *inp; 605 struct in6pcb *inp6; 606 int error; 607 608 inp = (struct sctp_inpcb *)so->so_pcb; 609 if (inp == NULL) { 610 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 611 return (EINVAL); 612 } 613 if (addr) { 614 switch (addr->sa_family) { 615 #ifdef INET 616 case AF_INET: 617 if (addr->sa_len != sizeof(struct sockaddr_in)) { 618 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 619 return (EINVAL); 620 } 621 break; 622 #endif 623 #ifdef INET6 624 case AF_INET6: 625 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 626 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 627 return (EINVAL); 628 } 629 break; 630 #endif 631 default: 632 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 633 return (EINVAL); 634 } 635 } 636 inp6 = (struct in6pcb *)inp; 637 inp6->inp_vflag &= ~INP_IPV4; 638 inp6->inp_vflag |= INP_IPV6; 639 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 640 switch (addr->sa_family) { 641 #ifdef INET 642 case AF_INET: 643 /* binding v4 addr to v6 socket, so reset flags */ 644 inp6->inp_vflag |= INP_IPV4; 645 inp6->inp_vflag &= ~INP_IPV6; 646 break; 647 #endif 648 #ifdef INET6 649 case AF_INET6: 650 { 651 struct sockaddr_in6 *sin6_p; 652 653 sin6_p = (struct sockaddr_in6 *)addr; 654 655 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 656 inp6->inp_vflag |= INP_IPV4; 657 } 658 #ifdef INET 659 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 660 struct sockaddr_in sin; 661 662 in6_sin6_2_sin(&sin, sin6_p); 663 inp6->inp_vflag |= INP_IPV4; 664 inp6->inp_vflag &= ~INP_IPV6; 665 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 666 return (error); 667 } 668 #endif 669 break; 670 } 671 #endif 672 default: 673 break; 674 } 675 } else if (addr != NULL) { 676 struct sockaddr_in6 *sin6_p; 677 678 /* IPV6_V6ONLY socket */ 679 #ifdef INET 680 if (addr->sa_family == AF_INET) { 681 /* can't bind v4 addr to v6 only socket! */ 682 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 683 return (EINVAL); 684 } 685 #endif 686 sin6_p = (struct sockaddr_in6 *)addr; 687 688 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 689 /* can't bind v4-mapped addrs either! */ 690 /* NOTE: we don't support SIIT */ 691 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 692 return (EINVAL); 693 } 694 } 695 error = sctp_inpcb_bind(so, addr, NULL, p); 696 return (error); 697 } 698 699 700 static void 701 sctp6_close(struct socket *so) 702 { 703 sctp_close(so); 704 } 705 706 /* This could be made common with sctp_detach() since they are identical */ 707 708 static 709 int 710 sctp6_disconnect(struct socket *so) 711 { 712 return (sctp_disconnect(so)); 713 } 714 715 716 int 717 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 718 struct mbuf *control, struct thread *p); 719 720 721 static int 722 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 723 struct mbuf *control, struct thread *p) 724 { 725 struct sctp_inpcb *inp; 726 struct in6pcb *inp6; 727 728 #ifdef INET 729 struct sockaddr_in6 *sin6; 730 731 #endif /* INET */ 732 /* No SPL needed since sctp_output does this */ 733 734 inp = (struct sctp_inpcb *)so->so_pcb; 735 if (inp == NULL) { 736 if (control) { 737 SCTP_RELEASE_PKT(control); 738 control = NULL; 739 } 740 SCTP_RELEASE_PKT(m); 741 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 742 return (EINVAL); 743 } 744 inp6 = (struct in6pcb *)inp; 745 /* 746 * For the TCP model we may get a NULL addr, if we are a connected 747 * socket thats ok. 748 */ 749 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 750 (addr == NULL)) { 751 goto connected_type; 752 } 753 if (addr == NULL) { 754 SCTP_RELEASE_PKT(m); 755 if (control) { 756 SCTP_RELEASE_PKT(control); 757 control = NULL; 758 } 759 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 760 return (EDESTADDRREQ); 761 } 762 #ifdef INET 763 sin6 = (struct sockaddr_in6 *)addr; 764 if (SCTP_IPV6_V6ONLY(inp6)) { 765 /* 766 * if IPV6_V6ONLY flag, we discard datagrams destined to a 767 * v4 addr or v4-mapped addr 768 */ 769 if (addr->sa_family == AF_INET) { 770 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 771 return (EINVAL); 772 } 773 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 774 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 775 return (EINVAL); 776 } 777 } 778 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 779 struct sockaddr_in sin; 780 781 /* convert v4-mapped into v4 addr and send */ 782 in6_sin6_2_sin(&sin, sin6); 783 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 784 } 785 #endif /* INET */ 786 connected_type: 787 /* now what about control */ 788 if (control) { 789 if (inp->control) { 790 SCTP_PRINTF("huh? control set?\n"); 791 SCTP_RELEASE_PKT(inp->control); 792 inp->control = NULL; 793 } 794 inp->control = control; 795 } 796 /* Place the data */ 797 if (inp->pkt) { 798 SCTP_BUF_NEXT(inp->pkt_last) = m; 799 inp->pkt_last = m; 800 } else { 801 inp->pkt_last = inp->pkt = m; 802 } 803 if ( 804 /* FreeBSD and MacOSX uses a flag passed */ 805 ((flags & PRUS_MORETOCOME) == 0) 806 ) { 807 /* 808 * note with the current version this code will only be used 809 * by OpenBSD, NetBSD and FreeBSD have methods for 810 * re-defining sosend() to use sctp_sosend(). One can 811 * optionaly switch back to this code (by changing back the 812 * defininitions but this is not advisable. 813 */ 814 int ret; 815 816 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 817 inp->pkt = NULL; 818 inp->control = NULL; 819 return (ret); 820 } else { 821 return (0); 822 } 823 } 824 825 static int 826 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 827 { 828 uint32_t vrf_id; 829 int error = 0; 830 struct sctp_inpcb *inp; 831 struct sctp_tcb *stcb; 832 833 #ifdef INET 834 struct in6pcb *inp6; 835 struct sockaddr_in6 *sin6; 836 union sctp_sockstore store; 837 838 #endif 839 840 #ifdef INET 841 inp6 = (struct in6pcb *)so->so_pcb; 842 #endif 843 inp = (struct sctp_inpcb *)so->so_pcb; 844 if (inp == NULL) { 845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 846 return (ECONNRESET); /* I made the same as TCP since we are 847 * not setup? */ 848 } 849 if (addr == NULL) { 850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 851 return (EINVAL); 852 } 853 switch (addr->sa_family) { 854 #ifdef INET 855 case AF_INET: 856 if (addr->sa_len != sizeof(struct sockaddr_in)) { 857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 858 return (EINVAL); 859 } 860 break; 861 #endif 862 #ifdef INET6 863 case AF_INET6: 864 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 866 return (EINVAL); 867 } 868 break; 869 #endif 870 default: 871 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 872 return (EINVAL); 873 } 874 875 vrf_id = inp->def_vrf_id; 876 SCTP_ASOC_CREATE_LOCK(inp); 877 SCTP_INP_RLOCK(inp); 878 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 879 SCTP_PCB_FLAGS_UNBOUND) { 880 /* Bind a ephemeral port */ 881 SCTP_INP_RUNLOCK(inp); 882 error = sctp6_bind(so, NULL, p); 883 if (error) { 884 SCTP_ASOC_CREATE_UNLOCK(inp); 885 886 return (error); 887 } 888 SCTP_INP_RLOCK(inp); 889 } 890 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 891 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 892 /* We are already connected AND the TCP model */ 893 SCTP_INP_RUNLOCK(inp); 894 SCTP_ASOC_CREATE_UNLOCK(inp); 895 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 896 return (EADDRINUSE); 897 } 898 #ifdef INET 899 sin6 = (struct sockaddr_in6 *)addr; 900 if (SCTP_IPV6_V6ONLY(inp6)) { 901 /* 902 * if IPV6_V6ONLY flag, ignore connections destined to a v4 903 * addr or v4-mapped addr 904 */ 905 if (addr->sa_family == AF_INET) { 906 SCTP_INP_RUNLOCK(inp); 907 SCTP_ASOC_CREATE_UNLOCK(inp); 908 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 909 return (EINVAL); 910 } 911 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 912 SCTP_INP_RUNLOCK(inp); 913 SCTP_ASOC_CREATE_UNLOCK(inp); 914 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 915 return (EINVAL); 916 } 917 } 918 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 919 /* convert v4-mapped into v4 addr */ 920 in6_sin6_2_sin(&store.sin, sin6); 921 addr = &store.sa; 922 } 923 #endif /* INET */ 924 /* Now do we connect? */ 925 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 926 stcb = LIST_FIRST(&inp->sctp_asoc_list); 927 if (stcb) { 928 SCTP_TCB_UNLOCK(stcb); 929 } 930 SCTP_INP_RUNLOCK(inp); 931 } else { 932 SCTP_INP_RUNLOCK(inp); 933 SCTP_INP_WLOCK(inp); 934 SCTP_INP_INCR_REF(inp); 935 SCTP_INP_WUNLOCK(inp); 936 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 937 if (stcb == NULL) { 938 SCTP_INP_WLOCK(inp); 939 SCTP_INP_DECR_REF(inp); 940 SCTP_INP_WUNLOCK(inp); 941 } 942 } 943 944 if (stcb != NULL) { 945 /* Already have or am bring up an association */ 946 SCTP_ASOC_CREATE_UNLOCK(inp); 947 SCTP_TCB_UNLOCK(stcb); 948 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 949 return (EALREADY); 950 } 951 /* We are GOOD to go */ 952 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, p); 953 SCTP_ASOC_CREATE_UNLOCK(inp); 954 if (stcb == NULL) { 955 /* Gak! no memory */ 956 return (error); 957 } 958 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 959 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 960 /* Set the connected flag so we can queue data */ 961 soisconnecting(so); 962 } 963 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 964 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 965 966 /* initialize authentication parameters for the assoc */ 967 sctp_initialize_auth_params(inp, stcb); 968 969 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 970 SCTP_TCB_UNLOCK(stcb); 971 return (error); 972 } 973 974 static int 975 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 976 { 977 struct sockaddr_in6 *sin6; 978 struct sctp_inpcb *inp; 979 uint32_t vrf_id; 980 struct sctp_ifa *sctp_ifa; 981 982 int error; 983 984 /* 985 * Do the malloc first in case it blocks. 986 */ 987 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 988 if (sin6 == NULL) 989 return (ENOMEM); 990 sin6->sin6_family = AF_INET6; 991 sin6->sin6_len = sizeof(*sin6); 992 993 inp = (struct sctp_inpcb *)so->so_pcb; 994 if (inp == NULL) { 995 SCTP_FREE_SONAME(sin6); 996 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 997 return (ECONNRESET); 998 } 999 SCTP_INP_RLOCK(inp); 1000 sin6->sin6_port = inp->sctp_lport; 1001 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1002 /* For the bound all case you get back 0 */ 1003 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1004 struct sctp_tcb *stcb; 1005 struct sockaddr_in6 *sin_a6; 1006 struct sctp_nets *net; 1007 int fnd; 1008 1009 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1010 if (stcb == NULL) { 1011 goto notConn6; 1012 } 1013 fnd = 0; 1014 sin_a6 = NULL; 1015 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1016 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1017 if (sin_a6 == NULL) 1018 /* this will make coverity happy */ 1019 continue; 1020 1021 if (sin_a6->sin6_family == AF_INET6) { 1022 fnd = 1; 1023 break; 1024 } 1025 } 1026 if ((!fnd) || (sin_a6 == NULL)) { 1027 /* punt */ 1028 goto notConn6; 1029 } 1030 vrf_id = inp->def_vrf_id; 1031 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1032 if (sctp_ifa) { 1033 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1034 } 1035 } else { 1036 /* For the bound all case you get back 0 */ 1037 notConn6: 1038 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1039 } 1040 } else { 1041 /* Take the first IPv6 address in the list */ 1042 struct sctp_laddr *laddr; 1043 int fnd = 0; 1044 1045 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1046 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1047 struct sockaddr_in6 *sin_a; 1048 1049 sin_a = &laddr->ifa->address.sin6; 1050 sin6->sin6_addr = sin_a->sin6_addr; 1051 fnd = 1; 1052 break; 1053 } 1054 } 1055 if (!fnd) { 1056 SCTP_FREE_SONAME(sin6); 1057 SCTP_INP_RUNLOCK(inp); 1058 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1059 return (ENOENT); 1060 } 1061 } 1062 SCTP_INP_RUNLOCK(inp); 1063 /* Scoping things for v6 */ 1064 if ((error = sa6_recoverscope(sin6)) != 0) { 1065 SCTP_FREE_SONAME(sin6); 1066 return (error); 1067 } 1068 (*addr) = (struct sockaddr *)sin6; 1069 return (0); 1070 } 1071 1072 static int 1073 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1074 { 1075 struct sockaddr_in6 *sin6; 1076 int fnd; 1077 struct sockaddr_in6 *sin_a6; 1078 struct sctp_inpcb *inp; 1079 struct sctp_tcb *stcb; 1080 struct sctp_nets *net; 1081 int error; 1082 1083 /* Do the malloc first in case it blocks. */ 1084 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1085 if (sin6 == NULL) 1086 return (ENOMEM); 1087 sin6->sin6_family = AF_INET6; 1088 sin6->sin6_len = sizeof(*sin6); 1089 1090 inp = (struct sctp_inpcb *)so->so_pcb; 1091 if ((inp == NULL) || 1092 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1093 /* UDP type and listeners will drop out here */ 1094 SCTP_FREE_SONAME(sin6); 1095 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1096 return (ENOTCONN); 1097 } 1098 SCTP_INP_RLOCK(inp); 1099 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1100 if (stcb) { 1101 SCTP_TCB_LOCK(stcb); 1102 } 1103 SCTP_INP_RUNLOCK(inp); 1104 if (stcb == NULL) { 1105 SCTP_FREE_SONAME(sin6); 1106 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1107 return (ECONNRESET); 1108 } 1109 fnd = 0; 1110 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1111 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1112 if (sin_a6->sin6_family == AF_INET6) { 1113 fnd = 1; 1114 sin6->sin6_port = stcb->rport; 1115 sin6->sin6_addr = sin_a6->sin6_addr; 1116 break; 1117 } 1118 } 1119 SCTP_TCB_UNLOCK(stcb); 1120 if (!fnd) { 1121 /* No IPv4 address */ 1122 SCTP_FREE_SONAME(sin6); 1123 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1124 return (ENOENT); 1125 } 1126 if ((error = sa6_recoverscope(sin6)) != 0) { 1127 SCTP_FREE_SONAME(sin6); 1128 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1129 return (error); 1130 } 1131 *addr = (struct sockaddr *)sin6; 1132 return (0); 1133 } 1134 1135 static int 1136 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1137 { 1138 #ifdef INET 1139 struct sockaddr *addr; 1140 1141 #endif 1142 struct in6pcb *inp6 = sotoin6pcb(so); 1143 int error; 1144 1145 if (inp6 == NULL) { 1146 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1147 return (EINVAL); 1148 } 1149 /* allow v6 addresses precedence */ 1150 error = sctp6_getaddr(so, nam); 1151 #ifdef INET 1152 if (error) { 1153 /* try v4 next if v6 failed */ 1154 error = sctp_ingetaddr(so, nam); 1155 if (error) { 1156 return (error); 1157 } 1158 addr = *nam; 1159 /* if I'm V6ONLY, convert it to v4-mapped */ 1160 if (SCTP_IPV6_V6ONLY(inp6)) { 1161 struct sockaddr_in6 sin6; 1162 1163 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1164 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1165 } 1166 } 1167 #endif 1168 return (error); 1169 } 1170 1171 1172 static int 1173 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1174 { 1175 #ifdef INET 1176 struct sockaddr *addr; 1177 1178 #endif 1179 struct in6pcb *inp6 = sotoin6pcb(so); 1180 int error; 1181 1182 if (inp6 == NULL) { 1183 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1184 return (EINVAL); 1185 } 1186 /* allow v6 addresses precedence */ 1187 error = sctp6_peeraddr(so, nam); 1188 #ifdef INET 1189 if (error) { 1190 /* try v4 next if v6 failed */ 1191 error = sctp_peeraddr(so, nam); 1192 if (error) { 1193 return (error); 1194 } 1195 addr = *nam; 1196 /* if I'm V6ONLY, convert it to v4-mapped */ 1197 if (SCTP_IPV6_V6ONLY(inp6)) { 1198 struct sockaddr_in6 sin6; 1199 1200 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1201 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1202 } 1203 } 1204 #endif 1205 return (error); 1206 } 1207 1208 struct pr_usrreqs sctp6_usrreqs = { 1209 .pru_abort = sctp6_abort, 1210 .pru_accept = sctp_accept, 1211 .pru_attach = sctp6_attach, 1212 .pru_bind = sctp6_bind, 1213 .pru_connect = sctp6_connect, 1214 .pru_control = in6_control, 1215 .pru_close = sctp6_close, 1216 .pru_detach = sctp6_close, 1217 .pru_sopoll = sopoll_generic, 1218 .pru_flush = sctp_flush, 1219 .pru_disconnect = sctp6_disconnect, 1220 .pru_listen = sctp_listen, 1221 .pru_peeraddr = sctp6_getpeeraddr, 1222 .pru_send = sctp6_send, 1223 .pru_shutdown = sctp_shutdown, 1224 .pru_sockaddr = sctp6_in6getaddr, 1225 .pru_sosend = sctp_sosend, 1226 .pru_soreceive = sctp_soreceive 1227 }; 1228 1229 #endif 1230