1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #ifdef INET6 40 #include <sys/proc.h> 41 #include <netinet/sctp_pcb.h> 42 #include <netinet/sctp_header.h> 43 #include <netinet/sctp_var.h> 44 #include <netinet6/sctp6_var.h> 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/icmp6.h> 58 #include <netinet/udp.h> 59 60 int 61 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) 62 { 63 struct mbuf *m; 64 int iphlen; 65 uint32_t vrf_id; 66 uint8_t ecn_bits; 67 struct sockaddr_in6 src, dst; 68 struct ip6_hdr *ip6; 69 struct sctphdr *sh; 70 struct sctp_chunkhdr *ch; 71 int length, offset; 72 uint8_t compute_crc; 73 uint32_t mflowid; 74 uint8_t mflowtype; 75 uint16_t fibnum; 76 77 iphlen = *offp; 78 if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { 79 SCTP_RELEASE_PKT(*i_pak); 80 return (IPPROTO_DONE); 81 } 82 m = SCTP_HEADER_TO_CHAIN(*i_pak); 83 #ifdef SCTP_MBUF_LOGGING 84 /* Log in any input mbufs */ 85 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 86 sctp_log_mbc(m, SCTP_MBUF_INPUT); 87 } 88 #endif 89 #ifdef SCTP_PACKET_LOGGING 90 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 91 sctp_packet_log(m); 92 } 93 #endif 94 SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, 95 "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", 96 m->m_pkthdr.len, 97 if_name(m->m_pkthdr.rcvif), 98 (int)m->m_pkthdr.csum_flags, CSUM_BITS); 99 mflowid = m->m_pkthdr.flowid; 100 mflowtype = M_HASHTYPE_GET(m); 101 fibnum = M_GETFIB(m); 102 SCTP_STAT_INCR(sctps_recvpackets); 103 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 104 /* Get IP, SCTP, and first chunk header together in the first mbuf. */ 105 offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 106 if (m->m_len < offset) { 107 m = m_pullup(m, offset); 108 if (m == NULL) { 109 SCTP_STAT_INCR(sctps_hdrops); 110 return (IPPROTO_DONE); 111 } 112 } 113 ip6 = mtod(m, struct ip6_hdr *); 114 sh = (struct sctphdr *)(mtod(m, caddr_t)+iphlen); 115 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 116 offset -= sizeof(struct sctp_chunkhdr); 117 memset(&src, 0, sizeof(struct sockaddr_in6)); 118 src.sin6_family = AF_INET6; 119 src.sin6_len = sizeof(struct sockaddr_in6); 120 src.sin6_port = sh->src_port; 121 src.sin6_addr = ip6->ip6_src; 122 if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 123 goto out; 124 } 125 memset(&dst, 0, sizeof(struct sockaddr_in6)); 126 dst.sin6_family = AF_INET6; 127 dst.sin6_len = sizeof(struct sockaddr_in6); 128 dst.sin6_port = sh->dest_port; 129 dst.sin6_addr = ip6->ip6_dst; 130 if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { 131 goto out; 132 } 133 length = ntohs(ip6->ip6_plen) + iphlen; 134 /* Validate mbuf chain length with IP payload length. */ 135 if (SCTP_HEADER_LEN(m) != length) { 136 SCTPDBG(SCTP_DEBUG_INPUT1, 137 "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); 138 SCTP_STAT_INCR(sctps_hdrops); 139 goto out; 140 } 141 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 142 goto out; 143 } 144 ecn_bits = IPV6_TRAFFIC_CLASS(ip6); 145 if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { 146 SCTP_STAT_INCR(sctps_recvhwcrc); 147 compute_crc = 0; 148 } else { 149 SCTP_STAT_INCR(sctps_recvswcrc); 150 compute_crc = 1; 151 } 152 sctp_common_input_processing(&m, iphlen, offset, length, 153 (struct sockaddr *)&src, 154 (struct sockaddr *)&dst, 155 sh, ch, 156 compute_crc, 157 ecn_bits, 158 mflowtype, mflowid, fibnum, 159 vrf_id, port); 160 out: 161 if (m) { 162 sctp_m_freem(m); 163 } 164 return (IPPROTO_DONE); 165 } 166 167 int 168 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) 169 { 170 return (sctp6_input_with_port(i_pak, offp, 0)); 171 } 172 173 void 174 sctp6_notify(struct sctp_inpcb *inp, 175 struct sctp_tcb *stcb, 176 struct sctp_nets *net, 177 uint8_t icmp6_type, 178 uint8_t icmp6_code, 179 uint32_t next_mtu) 180 { 181 int timer_stopped; 182 183 switch (icmp6_type) { 184 case ICMP6_DST_UNREACH: 185 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || 186 (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || 187 (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || 188 (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { 189 /* Mark the net unreachable. */ 190 if (net->dest_state & SCTP_ADDR_REACHABLE) { 191 /* Ok that destination is not reachable */ 192 net->dest_state &= ~SCTP_ADDR_REACHABLE; 193 net->dest_state &= ~SCTP_ADDR_PF; 194 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 195 stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); 196 } 197 } 198 SCTP_TCB_UNLOCK(stcb); 199 break; 200 case ICMP6_PARAM_PROB: 201 /* Treat it like an ABORT. */ 202 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { 203 sctp_abort_notification(stcb, true, false, 0, NULL, SCTP_SO_NOT_LOCKED); 204 (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, 205 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); 206 } else { 207 SCTP_TCB_UNLOCK(stcb); 208 } 209 break; 210 case ICMP6_PACKET_TOO_BIG: 211 if (net->dest_state & SCTP_ADDR_NO_PMTUD) { 212 SCTP_TCB_UNLOCK(stcb); 213 break; 214 } 215 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { 216 timer_stopped = 1; 217 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 218 SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); 219 } else { 220 timer_stopped = 0; 221 } 222 /* Update the path MTU. */ 223 if (net->port) { 224 next_mtu -= sizeof(struct udphdr); 225 } 226 if (net->mtu > next_mtu) { 227 net->mtu = next_mtu; 228 if (net->port) { 229 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); 230 } else { 231 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); 232 } 233 } 234 /* Update the association MTU */ 235 if (stcb->asoc.smallest_mtu > next_mtu) { 236 sctp_pathmtu_adjustment(stcb, next_mtu, true); 237 } 238 /* Finally, start the PMTU timer if it was running before. */ 239 if (timer_stopped) { 240 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); 241 } 242 SCTP_TCB_UNLOCK(stcb); 243 break; 244 default: 245 SCTP_TCB_UNLOCK(stcb); 246 break; 247 } 248 } 249 250 void 251 sctp6_ctlinput(struct ip6ctlparam *ip6cp) 252 { 253 struct sctp_inpcb *inp; 254 struct sctp_tcb *stcb; 255 struct sctp_nets *net; 256 struct sctphdr sh; 257 struct sockaddr_in6 src, dst; 258 259 if (icmp6_errmap(ip6cp->ip6c_icmp6) == 0) { 260 return; 261 } 262 263 /* 264 * Check if we can safely examine the ports and the verification tag 265 * of the SCTP common header. 266 */ 267 if (ip6cp->ip6c_m->m_pkthdr.len < 268 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 269 return; 270 } 271 272 /* Copy out the port numbers and the verification tag. */ 273 memset(&sh, 0, sizeof(sh)); 274 m_copydata(ip6cp->ip6c_m, 275 ip6cp->ip6c_off, 276 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 277 (caddr_t)&sh); 278 memset(&src, 0, sizeof(struct sockaddr_in6)); 279 src.sin6_family = AF_INET6; 280 src.sin6_len = sizeof(struct sockaddr_in6); 281 src.sin6_port = sh.src_port; 282 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 283 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 284 return; 285 } 286 memset(&dst, 0, sizeof(struct sockaddr_in6)); 287 dst.sin6_family = AF_INET6; 288 dst.sin6_len = sizeof(struct sockaddr_in6); 289 dst.sin6_port = sh.dest_port; 290 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 291 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 292 return; 293 } 294 inp = NULL; 295 net = NULL; 296 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 297 (struct sockaddr *)&src, 298 &inp, &net, 1, SCTP_DEFAULT_VRFID); 299 if ((stcb != NULL) && 300 (net != NULL) && 301 (inp != NULL)) { 302 /* Check the verification tag */ 303 if (ntohl(sh.v_tag) != 0) { 304 /* 305 * This must be the verification tag used for 306 * sending out packets. We don't consider packets 307 * reflecting the verification tag. 308 */ 309 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 310 SCTP_TCB_UNLOCK(stcb); 311 return; 312 } 313 } else { 314 if (ip6cp->ip6c_m->m_pkthdr.len >= 315 ip6cp->ip6c_off + sizeof(struct sctphdr) + 316 sizeof(struct sctp_chunkhdr) + 317 offsetof(struct sctp_init, a_rwnd)) { 318 /* 319 * In this case we can check if we got an 320 * INIT chunk and if the initiate tag 321 * matches. 322 */ 323 uint32_t initiate_tag; 324 uint8_t chunk_type; 325 326 m_copydata(ip6cp->ip6c_m, 327 ip6cp->ip6c_off + 328 sizeof(struct sctphdr), 329 sizeof(uint8_t), 330 (caddr_t)&chunk_type); 331 m_copydata(ip6cp->ip6c_m, 332 ip6cp->ip6c_off + 333 sizeof(struct sctphdr) + 334 sizeof(struct sctp_chunkhdr), 335 sizeof(uint32_t), 336 (caddr_t)&initiate_tag); 337 if ((chunk_type != SCTP_INITIATION) || 338 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 339 SCTP_TCB_UNLOCK(stcb); 340 return; 341 } 342 } else { 343 SCTP_TCB_UNLOCK(stcb); 344 return; 345 } 346 } 347 sctp6_notify(inp, stcb, net, 348 ip6cp->ip6c_icmp6->icmp6_type, 349 ip6cp->ip6c_icmp6->icmp6_code, 350 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 351 } else { 352 if ((stcb == NULL) && (inp != NULL)) { 353 /* reduce inp's ref-count */ 354 SCTP_INP_WLOCK(inp); 355 SCTP_INP_DECR_REF(inp); 356 SCTP_INP_WUNLOCK(inp); 357 } 358 if (stcb) { 359 SCTP_TCB_UNLOCK(stcb); 360 } 361 } 362 } 363 364 /* 365 * this routine can probably be collasped into the one in sctp_userreq.c 366 * since they do the same thing and now we lookup with a sockaddr 367 */ 368 static int 369 sctp6_getcred(SYSCTL_HANDLER_ARGS) 370 { 371 struct xucred xuc; 372 struct sockaddr_in6 addrs[2]; 373 struct sctp_inpcb *inp; 374 struct sctp_nets *net; 375 struct sctp_tcb *stcb; 376 int error; 377 uint32_t vrf_id; 378 379 vrf_id = SCTP_DEFAULT_VRFID; 380 381 error = priv_check(req->td, PRIV_NETINET_GETCRED); 382 if (error) 383 return (error); 384 385 if (req->newlen != sizeof(addrs)) { 386 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 387 return (EINVAL); 388 } 389 if (req->oldlen != sizeof(struct ucred)) { 390 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 391 return (EINVAL); 392 } 393 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 394 if (error) 395 return (error); 396 397 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 398 sin6tosa(&addrs[0]), 399 &inp, &net, 1, vrf_id); 400 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 401 if ((inp != NULL) && (stcb == NULL)) { 402 /* reduce ref-count */ 403 SCTP_INP_WLOCK(inp); 404 SCTP_INP_DECR_REF(inp); 405 goto cred_can_cont; 406 } 407 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 408 error = ENOENT; 409 goto out; 410 } 411 SCTP_TCB_UNLOCK(stcb); 412 /* 413 * We use the write lock here, only since in the error leg we need 414 * it. If we used RLOCK, then we would have to 415 * wlock/decr/unlock/rlock. Which in theory could create a hole. 416 * Better to use higher wlock. 417 */ 418 SCTP_INP_WLOCK(inp); 419 cred_can_cont: 420 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 421 if (error) { 422 SCTP_INP_WUNLOCK(inp); 423 goto out; 424 } 425 cru2x(inp->sctp_socket->so_cred, &xuc); 426 SCTP_INP_WUNLOCK(inp); 427 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 428 out: 429 return (error); 430 } 431 432 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, 433 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 434 0, 0, sctp6_getcred, "S,ucred", 435 "Get the ucred of a SCTP6 connection"); 436 437 /* This is the same as the sctp_abort() could be made common */ 438 static void 439 sctp6_abort(struct socket *so) 440 { 441 struct epoch_tracker et; 442 struct sctp_inpcb *inp; 443 uint32_t flags; 444 445 inp = (struct sctp_inpcb *)so->so_pcb; 446 if (inp == NULL) { 447 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 448 return; 449 } 450 NET_EPOCH_ENTER(et); 451 sctp_must_try_again: 452 flags = inp->sctp_flags; 453 #ifdef SCTP_LOG_CLOSING 454 sctp_log_closing(inp, NULL, 17); 455 #endif 456 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 457 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 458 #ifdef SCTP_LOG_CLOSING 459 sctp_log_closing(inp, NULL, 16); 460 #endif 461 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 462 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 463 SOCK_LOCK(so); 464 SCTP_SB_CLEAR(so->so_snd); 465 /* 466 * same for the rcv ones, they are only here for the 467 * accounting/select. 468 */ 469 SCTP_SB_CLEAR(so->so_rcv); 470 /* Now null out the reference, we are completely detached. */ 471 so->so_pcb = NULL; 472 SOCK_UNLOCK(so); 473 } else { 474 flags = inp->sctp_flags; 475 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 476 goto sctp_must_try_again; 477 } 478 } 479 NET_EPOCH_EXIT(et); 480 return; 481 } 482 483 static int 484 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 485 { 486 int error; 487 struct sctp_inpcb *inp; 488 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 489 490 inp = (struct sctp_inpcb *)so->so_pcb; 491 if (inp != NULL) { 492 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 493 return (EINVAL); 494 } 495 496 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 497 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 498 if (error) 499 return (error); 500 } 501 error = sctp_inpcb_alloc(so, vrf_id); 502 if (error) 503 return (error); 504 inp = (struct sctp_inpcb *)so->so_pcb; 505 SCTP_INP_WLOCK(inp); 506 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 507 508 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 509 inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */ 510 inp->ip_inp.inp.in6p_cksum = -1; /* just to be sure */ 511 #ifdef INET 512 /* 513 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 514 * socket as well, because the socket may be bound to an IPv6 515 * wildcard address, which may match an IPv4-mapped IPv6 address. 516 */ 517 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 518 #endif 519 SCTP_INP_WUNLOCK(inp); 520 return (0); 521 } 522 523 static int 524 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 525 { 526 struct sctp_inpcb *inp; 527 int error; 528 u_char vflagsav; 529 530 inp = (struct sctp_inpcb *)so->so_pcb; 531 if (inp == NULL) { 532 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 533 return (EINVAL); 534 } 535 536 if (addr) { 537 switch (addr->sa_family) { 538 #ifdef INET 539 case AF_INET: 540 if (addr->sa_len != sizeof(struct sockaddr_in)) { 541 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 542 return (EINVAL); 543 } 544 break; 545 #endif 546 #ifdef INET6 547 case AF_INET6: 548 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 549 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 550 return (EINVAL); 551 } 552 break; 553 #endif 554 default: 555 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 556 return (EINVAL); 557 } 558 } 559 vflagsav = inp->ip_inp.inp.inp_vflag; 560 inp->ip_inp.inp.inp_vflag &= ~INP_IPV4; 561 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 562 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) { 563 switch (addr->sa_family) { 564 #ifdef INET 565 case AF_INET: 566 /* binding v4 addr to v6 socket, so reset flags */ 567 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 568 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; 569 break; 570 #endif 571 #ifdef INET6 572 case AF_INET6: 573 { 574 struct sockaddr_in6 *sin6_p; 575 576 sin6_p = (struct sockaddr_in6 *)addr; 577 578 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 579 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 580 } 581 #ifdef INET 582 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 583 struct sockaddr_in sin; 584 585 in6_sin6_2_sin(&sin, sin6_p); 586 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 587 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; 588 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 589 goto out; 590 } 591 #endif 592 break; 593 } 594 #endif 595 default: 596 break; 597 } 598 } else if (addr != NULL) { 599 struct sockaddr_in6 *sin6_p; 600 601 /* IPV6_V6ONLY socket */ 602 #ifdef INET 603 if (addr->sa_family == AF_INET) { 604 /* can't bind v4 addr to v6 only socket! */ 605 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 606 error = EINVAL; 607 goto out; 608 } 609 #endif 610 sin6_p = (struct sockaddr_in6 *)addr; 611 612 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 613 /* can't bind v4-mapped addrs either! */ 614 /* NOTE: we don't support SIIT */ 615 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 616 error = EINVAL; 617 goto out; 618 } 619 } 620 error = sctp_inpcb_bind(so, addr, NULL, p); 621 out: 622 if (error != 0) 623 inp->ip_inp.inp.inp_vflag = vflagsav; 624 return (error); 625 } 626 627 static void 628 sctp6_close(struct socket *so) 629 { 630 sctp_close(so); 631 } 632 633 /* This could be made common with sctp_detach() since they are identical */ 634 635 static 636 int 637 sctp6_disconnect(struct socket *so) 638 { 639 return (sctp_disconnect(so)); 640 } 641 642 int 643 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 644 struct mbuf *control, struct thread *p); 645 646 static int 647 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 648 struct mbuf *control, struct thread *p) 649 { 650 struct sctp_inpcb *inp; 651 652 #ifdef INET 653 struct sockaddr_in6 *sin6; 654 #endif /* INET */ 655 /* No SPL needed since sctp_output does this */ 656 657 inp = (struct sctp_inpcb *)so->so_pcb; 658 if (inp == NULL) { 659 if (control) { 660 SCTP_RELEASE_PKT(control); 661 control = NULL; 662 } 663 SCTP_RELEASE_PKT(m); 664 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 665 return (EINVAL); 666 } 667 /* 668 * For the TCP model we may get a NULL addr, if we are a connected 669 * socket thats ok. 670 */ 671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 672 (addr == NULL)) { 673 goto connected_type; 674 } 675 if (addr == NULL) { 676 SCTP_RELEASE_PKT(m); 677 if (control) { 678 SCTP_RELEASE_PKT(control); 679 control = NULL; 680 } 681 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 682 return (EDESTADDRREQ); 683 } 684 switch (addr->sa_family) { 685 #ifdef INET 686 case AF_INET: 687 if (addr->sa_len != sizeof(struct sockaddr_in)) { 688 if (control) { 689 SCTP_RELEASE_PKT(control); 690 control = NULL; 691 } 692 SCTP_RELEASE_PKT(m); 693 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 694 return (EINVAL); 695 } 696 break; 697 #endif 698 #ifdef INET6 699 case AF_INET6: 700 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 701 if (control) { 702 SCTP_RELEASE_PKT(control); 703 control = NULL; 704 } 705 SCTP_RELEASE_PKT(m); 706 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 707 return (EINVAL); 708 } 709 break; 710 #endif 711 default: 712 if (control) { 713 SCTP_RELEASE_PKT(control); 714 control = NULL; 715 } 716 SCTP_RELEASE_PKT(m); 717 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 718 return (EINVAL); 719 } 720 #ifdef INET 721 sin6 = (struct sockaddr_in6 *)addr; 722 if (SCTP_IPV6_V6ONLY(inp)) { 723 /* 724 * if IPV6_V6ONLY flag, we discard datagrams destined to a 725 * v4 addr or v4-mapped addr 726 */ 727 if (addr->sa_family == AF_INET) { 728 if (control) { 729 SCTP_RELEASE_PKT(control); 730 control = NULL; 731 } 732 SCTP_RELEASE_PKT(m); 733 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 734 return (EINVAL); 735 } 736 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 737 if (control) { 738 SCTP_RELEASE_PKT(control); 739 control = NULL; 740 } 741 SCTP_RELEASE_PKT(m); 742 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 743 return (EINVAL); 744 } 745 } 746 if ((addr->sa_family == AF_INET6) && 747 IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 748 struct sockaddr_in sin; 749 750 /* convert v4-mapped into v4 addr and send */ 751 in6_sin6_2_sin(&sin, sin6); 752 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 753 } 754 #endif /* INET */ 755 connected_type: 756 /* now what about control */ 757 if (control) { 758 if (inp->control) { 759 SCTP_PRINTF("huh? control set?\n"); 760 SCTP_RELEASE_PKT(inp->control); 761 inp->control = NULL; 762 } 763 inp->control = control; 764 } 765 /* Place the data */ 766 if (inp->pkt) { 767 SCTP_BUF_NEXT(inp->pkt_last) = m; 768 inp->pkt_last = m; 769 } else { 770 inp->pkt_last = inp->pkt = m; 771 } 772 if ( 773 /* FreeBSD and MacOSX uses a flag passed */ 774 ((flags & PRUS_MORETOCOME) == 0) 775 ) { 776 /* 777 * note with the current version this code will only be used 778 * by OpenBSD, NetBSD and FreeBSD have methods for 779 * re-defining sosend() to use sctp_sosend(). One can 780 * optionaly switch back to this code (by changing back the 781 * defininitions but this is not advisable. 782 */ 783 struct epoch_tracker et; 784 int ret; 785 786 NET_EPOCH_ENTER(et); 787 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 788 NET_EPOCH_EXIT(et); 789 inp->pkt = NULL; 790 inp->control = NULL; 791 return (ret); 792 } else { 793 return (0); 794 } 795 } 796 797 static int 798 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 799 { 800 struct epoch_tracker et; 801 uint32_t vrf_id; 802 int error = 0; 803 struct sctp_inpcb *inp; 804 struct sctp_tcb *stcb; 805 #ifdef INET 806 struct sockaddr_in6 *sin6; 807 union sctp_sockstore store; 808 #endif 809 810 inp = (struct sctp_inpcb *)so->so_pcb; 811 if (inp == NULL) { 812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 813 return (ECONNRESET); /* I made the same as TCP since we are 814 * not setup? */ 815 } 816 if (addr == NULL) { 817 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 818 return (EINVAL); 819 } 820 switch (addr->sa_family) { 821 #ifdef INET 822 case AF_INET: 823 if (addr->sa_len != sizeof(struct sockaddr_in)) { 824 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 825 return (EINVAL); 826 } 827 break; 828 #endif 829 #ifdef INET6 830 case AF_INET6: 831 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 833 return (EINVAL); 834 } 835 break; 836 #endif 837 default: 838 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 839 return (EINVAL); 840 } 841 842 vrf_id = inp->def_vrf_id; 843 SCTP_ASOC_CREATE_LOCK(inp); 844 SCTP_INP_RLOCK(inp); 845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 846 SCTP_PCB_FLAGS_UNBOUND) { 847 /* Bind a ephemeral port */ 848 SCTP_INP_RUNLOCK(inp); 849 error = sctp6_bind(so, NULL, p); 850 if (error) { 851 SCTP_ASOC_CREATE_UNLOCK(inp); 852 853 return (error); 854 } 855 SCTP_INP_RLOCK(inp); 856 } 857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 858 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 859 /* We are already connected AND the TCP model */ 860 SCTP_INP_RUNLOCK(inp); 861 SCTP_ASOC_CREATE_UNLOCK(inp); 862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 863 return (EADDRINUSE); 864 } 865 #ifdef INET 866 sin6 = (struct sockaddr_in6 *)addr; 867 if (SCTP_IPV6_V6ONLY(inp)) { 868 /* 869 * if IPV6_V6ONLY flag, ignore connections destined to a v4 870 * addr or v4-mapped addr 871 */ 872 if (addr->sa_family == AF_INET) { 873 SCTP_INP_RUNLOCK(inp); 874 SCTP_ASOC_CREATE_UNLOCK(inp); 875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 876 return (EINVAL); 877 } 878 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 879 SCTP_INP_RUNLOCK(inp); 880 SCTP_ASOC_CREATE_UNLOCK(inp); 881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 882 return (EINVAL); 883 } 884 } 885 if ((addr->sa_family == AF_INET6) && 886 IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 887 /* convert v4-mapped into v4 addr */ 888 in6_sin6_2_sin(&store.sin, sin6); 889 addr = &store.sa; 890 } 891 #endif /* INET */ 892 /* Now do we connect? */ 893 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 894 stcb = LIST_FIRST(&inp->sctp_asoc_list); 895 if (stcb) { 896 SCTP_TCB_LOCK(stcb); 897 } 898 SCTP_INP_RUNLOCK(inp); 899 } else { 900 SCTP_INP_RUNLOCK(inp); 901 SCTP_INP_WLOCK(inp); 902 SCTP_INP_INCR_REF(inp); 903 SCTP_INP_WUNLOCK(inp); 904 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 905 if (stcb == NULL) { 906 SCTP_INP_WLOCK(inp); 907 SCTP_INP_DECR_REF(inp); 908 SCTP_INP_WUNLOCK(inp); 909 } 910 } 911 912 if (stcb != NULL) { 913 /* Already have or am bring up an association */ 914 SCTP_ASOC_CREATE_UNLOCK(inp); 915 SCTP_TCB_UNLOCK(stcb); 916 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 917 return (EALREADY); 918 } 919 /* We are GOOD to go */ 920 stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id, 921 inp->sctp_ep.pre_open_stream_count, 922 inp->sctp_ep.port, p, 923 SCTP_INITIALIZE_AUTH_PARAMS); 924 SCTP_ASOC_CREATE_UNLOCK(inp); 925 if (stcb == NULL) { 926 /* Gak! no memory */ 927 return (error); 928 } 929 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); 930 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 931 NET_EPOCH_ENTER(et); 932 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 933 SCTP_TCB_UNLOCK(stcb); 934 NET_EPOCH_EXIT(et); 935 return (error); 936 } 937 938 static int 939 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 940 { 941 struct sockaddr_in6 *sin6; 942 struct sctp_inpcb *inp; 943 uint32_t vrf_id; 944 struct sctp_ifa *sctp_ifa; 945 946 int error; 947 948 /* 949 * Do the malloc first in case it blocks. 950 */ 951 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 952 if (sin6 == NULL) 953 return (ENOMEM); 954 sin6->sin6_family = AF_INET6; 955 sin6->sin6_len = sizeof(*sin6); 956 957 inp = (struct sctp_inpcb *)so->so_pcb; 958 if (inp == NULL) { 959 SCTP_FREE_SONAME(sin6); 960 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 961 return (ECONNRESET); 962 } 963 SCTP_INP_RLOCK(inp); 964 sin6->sin6_port = inp->sctp_lport; 965 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 966 /* For the bound all case you get back 0 */ 967 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 968 struct sctp_tcb *stcb; 969 struct sockaddr_in6 *sin_a6; 970 struct sctp_nets *net; 971 int fnd; 972 973 stcb = LIST_FIRST(&inp->sctp_asoc_list); 974 if (stcb == NULL) { 975 SCTP_INP_RUNLOCK(inp); 976 SCTP_FREE_SONAME(sin6); 977 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 978 return (ENOENT); 979 } 980 fnd = 0; 981 sin_a6 = NULL; 982 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 983 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 984 if (sin_a6 == NULL) 985 /* this will make coverity happy */ 986 continue; 987 988 if (sin_a6->sin6_family == AF_INET6) { 989 fnd = 1; 990 break; 991 } 992 } 993 if ((!fnd) || (sin_a6 == NULL)) { 994 /* punt */ 995 SCTP_INP_RUNLOCK(inp); 996 SCTP_FREE_SONAME(sin6); 997 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 998 return (ENOENT); 999 } 1000 vrf_id = inp->def_vrf_id; 1001 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 1002 if (sctp_ifa) { 1003 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1004 } 1005 } else { 1006 /* For the bound all case you get back 0 */ 1007 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1008 } 1009 } else { 1010 /* Take the first IPv6 address in the list */ 1011 struct sctp_laddr *laddr; 1012 int fnd = 0; 1013 1014 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1015 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1016 struct sockaddr_in6 *sin_a; 1017 1018 sin_a = &laddr->ifa->address.sin6; 1019 sin6->sin6_addr = sin_a->sin6_addr; 1020 fnd = 1; 1021 break; 1022 } 1023 } 1024 if (!fnd) { 1025 SCTP_FREE_SONAME(sin6); 1026 SCTP_INP_RUNLOCK(inp); 1027 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1028 return (ENOENT); 1029 } 1030 } 1031 SCTP_INP_RUNLOCK(inp); 1032 /* Scoping things for v6 */ 1033 if ((error = sa6_recoverscope(sin6)) != 0) { 1034 SCTP_FREE_SONAME(sin6); 1035 return (error); 1036 } 1037 (*addr) = (struct sockaddr *)sin6; 1038 return (0); 1039 } 1040 1041 static int 1042 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1043 { 1044 struct sockaddr_in6 *sin6; 1045 int fnd; 1046 struct sockaddr_in6 *sin_a6; 1047 struct sctp_inpcb *inp; 1048 struct sctp_tcb *stcb; 1049 struct sctp_nets *net; 1050 int error; 1051 1052 /* Do the malloc first in case it blocks. */ 1053 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1054 if (sin6 == NULL) 1055 return (ENOMEM); 1056 sin6->sin6_family = AF_INET6; 1057 sin6->sin6_len = sizeof(*sin6); 1058 1059 inp = (struct sctp_inpcb *)so->so_pcb; 1060 if ((inp == NULL) || 1061 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1062 /* UDP type and listeners will drop out here */ 1063 SCTP_FREE_SONAME(sin6); 1064 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1065 return (ENOTCONN); 1066 } 1067 SCTP_INP_RLOCK(inp); 1068 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1069 if (stcb) { 1070 SCTP_TCB_LOCK(stcb); 1071 } 1072 SCTP_INP_RUNLOCK(inp); 1073 if (stcb == NULL) { 1074 SCTP_FREE_SONAME(sin6); 1075 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1076 return (ECONNRESET); 1077 } 1078 fnd = 0; 1079 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1080 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1081 if (sin_a6->sin6_family == AF_INET6) { 1082 fnd = 1; 1083 sin6->sin6_port = stcb->rport; 1084 sin6->sin6_addr = sin_a6->sin6_addr; 1085 break; 1086 } 1087 } 1088 SCTP_TCB_UNLOCK(stcb); 1089 if (!fnd) { 1090 /* No IPv4 address */ 1091 SCTP_FREE_SONAME(sin6); 1092 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1093 return (ENOENT); 1094 } 1095 if ((error = sa6_recoverscope(sin6)) != 0) { 1096 SCTP_FREE_SONAME(sin6); 1097 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1098 return (error); 1099 } 1100 *addr = (struct sockaddr *)sin6; 1101 return (0); 1102 } 1103 1104 static int 1105 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1106 { 1107 struct inpcb *inp = sotoinpcb(so); 1108 int error; 1109 1110 if (inp == NULL) { 1111 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1112 return (EINVAL); 1113 } 1114 1115 /* allow v6 addresses precedence */ 1116 error = sctp6_getaddr(so, nam); 1117 #ifdef INET 1118 if (error) { 1119 struct sockaddr_in6 *sin6; 1120 1121 /* try v4 next if v6 failed */ 1122 error = sctp_ingetaddr(so, nam); 1123 if (error) { 1124 return (error); 1125 } 1126 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1127 if (sin6 == NULL) { 1128 SCTP_FREE_SONAME(*nam); 1129 return (ENOMEM); 1130 } 1131 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1132 SCTP_FREE_SONAME(*nam); 1133 *nam = (struct sockaddr *)sin6; 1134 } 1135 #endif 1136 return (error); 1137 } 1138 1139 static int 1140 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1141 { 1142 struct inpcb *inp = sotoinpcb(so); 1143 int error; 1144 1145 if (inp == NULL) { 1146 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1147 return (EINVAL); 1148 } 1149 1150 /* allow v6 addresses precedence */ 1151 error = sctp6_peeraddr(so, nam); 1152 #ifdef INET 1153 if (error) { 1154 struct sockaddr_in6 *sin6; 1155 1156 /* try v4 next if v6 failed */ 1157 error = sctp_peeraddr(so, nam); 1158 if (error) { 1159 return (error); 1160 } 1161 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1162 if (sin6 == NULL) { 1163 SCTP_FREE_SONAME(*nam); 1164 return (ENOMEM); 1165 } 1166 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1167 SCTP_FREE_SONAME(*nam); 1168 *nam = (struct sockaddr *)sin6; 1169 } 1170 #endif 1171 return (error); 1172 } 1173 1174 #define SCTP6_PROTOSW \ 1175 .pr_protocol = IPPROTO_SCTP, \ 1176 .pr_ctloutput = sctp_ctloutput, \ 1177 .pr_abort = sctp6_abort, \ 1178 .pr_accept = sctp_accept, \ 1179 .pr_attach = sctp6_attach, \ 1180 .pr_bind = sctp6_bind, \ 1181 .pr_connect = sctp6_connect, \ 1182 .pr_control = in6_control, \ 1183 .pr_close = sctp6_close, \ 1184 .pr_detach = sctp6_close, \ 1185 .pr_sopoll = sopoll_generic, \ 1186 .pr_flush = sctp_flush, \ 1187 .pr_disconnect = sctp6_disconnect, \ 1188 .pr_listen = sctp_listen, \ 1189 .pr_peeraddr = sctp6_getpeeraddr, \ 1190 .pr_send = sctp6_send, \ 1191 .pr_shutdown = sctp_shutdown, \ 1192 .pr_sockaddr = sctp6_in6getaddr, \ 1193 .pr_sosend = sctp_sosend, \ 1194 .pr_soreceive = sctp_soreceive 1195 1196 struct protosw sctp6_seqpacket_protosw = { 1197 .pr_type = SOCK_SEQPACKET, 1198 .pr_flags = PR_WANTRCVD, 1199 SCTP6_PROTOSW 1200 }; 1201 1202 struct protosw sctp6_stream_protosw = { 1203 .pr_type = SOCK_STREAM, 1204 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD, 1205 SCTP6_PROTOSW 1206 }; 1207 #endif 1208