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); 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(int cmd, struct sockaddr *pktdst, void *d) 252 { 253 struct ip6ctlparam *ip6cp; 254 struct sctp_inpcb *inp; 255 struct sctp_tcb *stcb; 256 struct sctp_nets *net; 257 struct sctphdr sh; 258 struct sockaddr_in6 src, dst; 259 260 if (pktdst->sa_family != AF_INET6 || 261 pktdst->sa_len != sizeof(struct sockaddr_in6)) { 262 return; 263 } 264 265 if ((unsigned)cmd >= PRC_NCMDS) { 266 return; 267 } 268 if (PRC_IS_REDIRECT(cmd)) { 269 d = NULL; 270 } else if (inet6ctlerrmap[cmd] == 0) { 271 return; 272 } 273 /* If the parameter is from icmp6, decode it. */ 274 if (d != NULL) { 275 ip6cp = (struct ip6ctlparam *)d; 276 } else { 277 ip6cp = (struct ip6ctlparam *)NULL; 278 } 279 280 if (ip6cp != NULL) { 281 /* 282 * XXX: We assume that when IPV6 is non NULL, M and OFF are 283 * valid. 284 */ 285 if (ip6cp->ip6c_m == NULL) { 286 return; 287 } 288 289 /* 290 * Check if we can safely examine the ports and the 291 * verification tag of the SCTP common header. 292 */ 293 if (ip6cp->ip6c_m->m_pkthdr.len < 294 (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { 295 return; 296 } 297 298 /* Copy out the port numbers and the verification tag. */ 299 memset(&sh, 0, sizeof(sh)); 300 m_copydata(ip6cp->ip6c_m, 301 ip6cp->ip6c_off, 302 sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), 303 (caddr_t)&sh); 304 memset(&src, 0, sizeof(struct sockaddr_in6)); 305 src.sin6_family = AF_INET6; 306 src.sin6_len = sizeof(struct sockaddr_in6); 307 src.sin6_port = sh.src_port; 308 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; 309 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 310 return; 311 } 312 memset(&dst, 0, sizeof(struct sockaddr_in6)); 313 dst.sin6_family = AF_INET6; 314 dst.sin6_len = sizeof(struct sockaddr_in6); 315 dst.sin6_port = sh.dest_port; 316 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; 317 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { 318 return; 319 } 320 inp = NULL; 321 net = NULL; 322 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, 323 (struct sockaddr *)&src, 324 &inp, &net, 1, SCTP_DEFAULT_VRFID); 325 if ((stcb != NULL) && 326 (net != NULL) && 327 (inp != NULL)) { 328 /* Check the verification tag */ 329 if (ntohl(sh.v_tag) != 0) { 330 /* 331 * This must be the verification tag used 332 * for sending out packets. We don't 333 * consider packets reflecting the 334 * verification tag. 335 */ 336 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { 337 SCTP_TCB_UNLOCK(stcb); 338 return; 339 } 340 } else { 341 if (ip6cp->ip6c_m->m_pkthdr.len >= 342 ip6cp->ip6c_off + sizeof(struct sctphdr) + 343 sizeof(struct sctp_chunkhdr) + 344 offsetof(struct sctp_init, a_rwnd)) { 345 /* 346 * In this case we can check if we 347 * got an INIT chunk and if the 348 * initiate tag matches. 349 */ 350 uint32_t initiate_tag; 351 uint8_t chunk_type; 352 353 m_copydata(ip6cp->ip6c_m, 354 ip6cp->ip6c_off + 355 sizeof(struct sctphdr), 356 sizeof(uint8_t), 357 (caddr_t)&chunk_type); 358 m_copydata(ip6cp->ip6c_m, 359 ip6cp->ip6c_off + 360 sizeof(struct sctphdr) + 361 sizeof(struct sctp_chunkhdr), 362 sizeof(uint32_t), 363 (caddr_t)&initiate_tag); 364 if ((chunk_type != SCTP_INITIATION) || 365 (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { 366 SCTP_TCB_UNLOCK(stcb); 367 return; 368 } 369 } else { 370 SCTP_TCB_UNLOCK(stcb); 371 return; 372 } 373 } 374 sctp6_notify(inp, stcb, net, 375 ip6cp->ip6c_icmp6->icmp6_type, 376 ip6cp->ip6c_icmp6->icmp6_code, 377 ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); 378 } else { 379 if ((stcb == NULL) && (inp != NULL)) { 380 /* reduce inp's ref-count */ 381 SCTP_INP_WLOCK(inp); 382 SCTP_INP_DECR_REF(inp); 383 SCTP_INP_WUNLOCK(inp); 384 } 385 if (stcb) { 386 SCTP_TCB_UNLOCK(stcb); 387 } 388 } 389 } 390 } 391 392 /* 393 * this routine can probably be collasped into the one in sctp_userreq.c 394 * since they do the same thing and now we lookup with a sockaddr 395 */ 396 static int 397 sctp6_getcred(SYSCTL_HANDLER_ARGS) 398 { 399 struct xucred xuc; 400 struct sockaddr_in6 addrs[2]; 401 struct sctp_inpcb *inp; 402 struct sctp_nets *net; 403 struct sctp_tcb *stcb; 404 int error; 405 uint32_t vrf_id; 406 407 vrf_id = SCTP_DEFAULT_VRFID; 408 409 error = priv_check(req->td, PRIV_NETINET_GETCRED); 410 if (error) 411 return (error); 412 413 if (req->newlen != sizeof(addrs)) { 414 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 415 return (EINVAL); 416 } 417 if (req->oldlen != sizeof(struct ucred)) { 418 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 419 return (EINVAL); 420 } 421 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 422 if (error) 423 return (error); 424 425 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), 426 sin6tosa(&addrs[0]), 427 &inp, &net, 1, vrf_id); 428 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 429 if ((inp != NULL) && (stcb == NULL)) { 430 /* reduce ref-count */ 431 SCTP_INP_WLOCK(inp); 432 SCTP_INP_DECR_REF(inp); 433 goto cred_can_cont; 434 } 435 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 436 error = ENOENT; 437 goto out; 438 } 439 SCTP_TCB_UNLOCK(stcb); 440 /* 441 * We use the write lock here, only since in the error leg we need 442 * it. If we used RLOCK, then we would have to 443 * wlock/decr/unlock/rlock. Which in theory could create a hole. 444 * Better to use higher wlock. 445 */ 446 SCTP_INP_WLOCK(inp); 447 cred_can_cont: 448 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 449 if (error) { 450 SCTP_INP_WUNLOCK(inp); 451 goto out; 452 } 453 cru2x(inp->sctp_socket->so_cred, &xuc); 454 SCTP_INP_WUNLOCK(inp); 455 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 456 out: 457 return (error); 458 } 459 460 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, 461 CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 462 0, 0, sctp6_getcred, "S,ucred", 463 "Get the ucred of a SCTP6 connection"); 464 465 /* This is the same as the sctp_abort() could be made common */ 466 static void 467 sctp6_abort(struct socket *so) 468 { 469 struct epoch_tracker et; 470 struct sctp_inpcb *inp; 471 uint32_t flags; 472 473 inp = (struct sctp_inpcb *)so->so_pcb; 474 if (inp == NULL) { 475 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 476 return; 477 } 478 NET_EPOCH_ENTER(et); 479 sctp_must_try_again: 480 flags = inp->sctp_flags; 481 #ifdef SCTP_LOG_CLOSING 482 sctp_log_closing(inp, NULL, 17); 483 #endif 484 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 485 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 486 #ifdef SCTP_LOG_CLOSING 487 sctp_log_closing(inp, NULL, 16); 488 #endif 489 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT, 490 SCTP_CALLED_AFTER_CMPSET_OFCLOSE); 491 SOCK_LOCK(so); 492 SCTP_SB_CLEAR(so->so_snd); 493 /* 494 * same for the rcv ones, they are only here for the 495 * accounting/select. 496 */ 497 SCTP_SB_CLEAR(so->so_rcv); 498 /* Now null out the reference, we are completely detached. */ 499 so->so_pcb = NULL; 500 SOCK_UNLOCK(so); 501 } else { 502 flags = inp->sctp_flags; 503 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 504 goto sctp_must_try_again; 505 } 506 } 507 NET_EPOCH_EXIT(et); 508 return; 509 } 510 511 static int 512 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) 513 { 514 int error; 515 struct sctp_inpcb *inp; 516 uint32_t vrf_id = SCTP_DEFAULT_VRFID; 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 (EINVAL); 522 } 523 524 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 525 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); 526 if (error) 527 return (error); 528 } 529 error = sctp_inpcb_alloc(so, vrf_id); 530 if (error) 531 return (error); 532 inp = (struct sctp_inpcb *)so->so_pcb; 533 SCTP_INP_WLOCK(inp); 534 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 535 536 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 537 inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */ 538 inp->ip_inp.inp.in6p_cksum = -1; /* just to be sure */ 539 #ifdef INET 540 /* 541 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 542 * socket as well, because the socket may be bound to an IPv6 543 * wildcard address, which may match an IPv4-mapped IPv6 address. 544 */ 545 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 546 #endif 547 SCTP_INP_WUNLOCK(inp); 548 return (0); 549 } 550 551 static int 552 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 553 { 554 struct sctp_inpcb *inp; 555 int error; 556 u_char vflagsav; 557 558 inp = (struct sctp_inpcb *)so->so_pcb; 559 if (inp == NULL) { 560 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 561 return (EINVAL); 562 } 563 564 if (addr) { 565 switch (addr->sa_family) { 566 #ifdef INET 567 case AF_INET: 568 if (addr->sa_len != sizeof(struct sockaddr_in)) { 569 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 570 return (EINVAL); 571 } 572 break; 573 #endif 574 #ifdef INET6 575 case AF_INET6: 576 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 577 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 578 return (EINVAL); 579 } 580 break; 581 #endif 582 default: 583 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 584 return (EINVAL); 585 } 586 } 587 vflagsav = inp->ip_inp.inp.inp_vflag; 588 inp->ip_inp.inp.inp_vflag &= ~INP_IPV4; 589 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 590 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) { 591 switch (addr->sa_family) { 592 #ifdef INET 593 case AF_INET: 594 /* binding v4 addr to v6 socket, so reset flags */ 595 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 596 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; 597 break; 598 #endif 599 #ifdef INET6 600 case AF_INET6: 601 { 602 struct sockaddr_in6 *sin6_p; 603 604 sin6_p = (struct sockaddr_in6 *)addr; 605 606 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 607 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 608 } 609 #ifdef INET 610 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 611 struct sockaddr_in sin; 612 613 in6_sin6_2_sin(&sin, sin6_p); 614 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 615 inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; 616 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); 617 goto out; 618 } 619 #endif 620 break; 621 } 622 #endif 623 default: 624 break; 625 } 626 } else if (addr != NULL) { 627 struct sockaddr_in6 *sin6_p; 628 629 /* IPV6_V6ONLY socket */ 630 #ifdef INET 631 if (addr->sa_family == AF_INET) { 632 /* can't bind v4 addr to v6 only socket! */ 633 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 634 error = EINVAL; 635 goto out; 636 } 637 #endif 638 sin6_p = (struct sockaddr_in6 *)addr; 639 640 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 641 /* can't bind v4-mapped addrs either! */ 642 /* NOTE: we don't support SIIT */ 643 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 644 error = EINVAL; 645 goto out; 646 } 647 } 648 error = sctp_inpcb_bind(so, addr, NULL, p); 649 out: 650 if (error != 0) 651 inp->ip_inp.inp.inp_vflag = vflagsav; 652 return (error); 653 } 654 655 static void 656 sctp6_close(struct socket *so) 657 { 658 sctp_close(so); 659 } 660 661 /* This could be made common with sctp_detach() since they are identical */ 662 663 static 664 int 665 sctp6_disconnect(struct socket *so) 666 { 667 return (sctp_disconnect(so)); 668 } 669 670 int 671 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 672 struct mbuf *control, struct thread *p); 673 674 static int 675 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 676 struct mbuf *control, struct thread *p) 677 { 678 struct sctp_inpcb *inp; 679 680 #ifdef INET 681 struct sockaddr_in6 *sin6; 682 #endif /* INET */ 683 /* No SPL needed since sctp_output does this */ 684 685 inp = (struct sctp_inpcb *)so->so_pcb; 686 if (inp == NULL) { 687 if (control) { 688 SCTP_RELEASE_PKT(control); 689 control = NULL; 690 } 691 SCTP_RELEASE_PKT(m); 692 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 693 return (EINVAL); 694 } 695 /* 696 * For the TCP model we may get a NULL addr, if we are a connected 697 * socket thats ok. 698 */ 699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 700 (addr == NULL)) { 701 goto connected_type; 702 } 703 if (addr == NULL) { 704 SCTP_RELEASE_PKT(m); 705 if (control) { 706 SCTP_RELEASE_PKT(control); 707 control = NULL; 708 } 709 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 710 return (EDESTADDRREQ); 711 } 712 switch (addr->sa_family) { 713 #ifdef INET 714 case AF_INET: 715 if (addr->sa_len != sizeof(struct sockaddr_in)) { 716 if (control) { 717 SCTP_RELEASE_PKT(control); 718 control = NULL; 719 } 720 SCTP_RELEASE_PKT(m); 721 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 722 return (EINVAL); 723 } 724 break; 725 #endif 726 #ifdef INET6 727 case AF_INET6: 728 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 729 if (control) { 730 SCTP_RELEASE_PKT(control); 731 control = NULL; 732 } 733 SCTP_RELEASE_PKT(m); 734 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 735 return (EINVAL); 736 } 737 break; 738 #endif 739 default: 740 if (control) { 741 SCTP_RELEASE_PKT(control); 742 control = NULL; 743 } 744 SCTP_RELEASE_PKT(m); 745 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 746 return (EINVAL); 747 } 748 #ifdef INET 749 sin6 = (struct sockaddr_in6 *)addr; 750 if (SCTP_IPV6_V6ONLY(inp)) { 751 /* 752 * if IPV6_V6ONLY flag, we discard datagrams destined to a 753 * v4 addr or v4-mapped addr 754 */ 755 if (addr->sa_family == AF_INET) { 756 if (control) { 757 SCTP_RELEASE_PKT(control); 758 control = NULL; 759 } 760 SCTP_RELEASE_PKT(m); 761 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 762 return (EINVAL); 763 } 764 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 765 if (control) { 766 SCTP_RELEASE_PKT(control); 767 control = NULL; 768 } 769 SCTP_RELEASE_PKT(m); 770 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 771 return (EINVAL); 772 } 773 } 774 if ((addr->sa_family == AF_INET6) && 775 IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 776 struct sockaddr_in sin; 777 778 /* convert v4-mapped into v4 addr and send */ 779 in6_sin6_2_sin(&sin, sin6); 780 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 781 } 782 #endif /* INET */ 783 connected_type: 784 /* now what about control */ 785 if (control) { 786 if (inp->control) { 787 SCTP_PRINTF("huh? control set?\n"); 788 SCTP_RELEASE_PKT(inp->control); 789 inp->control = NULL; 790 } 791 inp->control = control; 792 } 793 /* Place the data */ 794 if (inp->pkt) { 795 SCTP_BUF_NEXT(inp->pkt_last) = m; 796 inp->pkt_last = m; 797 } else { 798 inp->pkt_last = inp->pkt = m; 799 } 800 if ( 801 /* FreeBSD and MacOSX uses a flag passed */ 802 ((flags & PRUS_MORETOCOME) == 0) 803 ) { 804 /* 805 * note with the current version this code will only be used 806 * by OpenBSD, NetBSD and FreeBSD have methods for 807 * re-defining sosend() to use sctp_sosend(). One can 808 * optionaly switch back to this code (by changing back the 809 * defininitions but this is not advisable. 810 */ 811 struct epoch_tracker et; 812 int ret; 813 814 NET_EPOCH_ENTER(et); 815 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 816 NET_EPOCH_EXIT(et); 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 struct epoch_tracker et; 829 uint32_t vrf_id; 830 int error = 0; 831 struct sctp_inpcb *inp; 832 struct sctp_tcb *stcb; 833 #ifdef INET 834 struct sockaddr_in6 *sin6; 835 union sctp_sockstore store; 836 #endif 837 838 inp = (struct sctp_inpcb *)so->so_pcb; 839 if (inp == NULL) { 840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 841 return (ECONNRESET); /* I made the same as TCP since we are 842 * not setup? */ 843 } 844 if (addr == NULL) { 845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 846 return (EINVAL); 847 } 848 switch (addr->sa_family) { 849 #ifdef INET 850 case AF_INET: 851 if (addr->sa_len != sizeof(struct sockaddr_in)) { 852 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 853 return (EINVAL); 854 } 855 break; 856 #endif 857 #ifdef INET6 858 case AF_INET6: 859 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 860 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 861 return (EINVAL); 862 } 863 break; 864 #endif 865 default: 866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 867 return (EINVAL); 868 } 869 870 vrf_id = inp->def_vrf_id; 871 SCTP_ASOC_CREATE_LOCK(inp); 872 SCTP_INP_RLOCK(inp); 873 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 874 SCTP_PCB_FLAGS_UNBOUND) { 875 /* Bind a ephemeral port */ 876 SCTP_INP_RUNLOCK(inp); 877 error = sctp6_bind(so, NULL, p); 878 if (error) { 879 SCTP_ASOC_CREATE_UNLOCK(inp); 880 881 return (error); 882 } 883 SCTP_INP_RLOCK(inp); 884 } 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 886 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 887 /* We are already connected AND the TCP model */ 888 SCTP_INP_RUNLOCK(inp); 889 SCTP_ASOC_CREATE_UNLOCK(inp); 890 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 891 return (EADDRINUSE); 892 } 893 #ifdef INET 894 sin6 = (struct sockaddr_in6 *)addr; 895 if (SCTP_IPV6_V6ONLY(inp)) { 896 /* 897 * if IPV6_V6ONLY flag, ignore connections destined to a v4 898 * addr or v4-mapped addr 899 */ 900 if (addr->sa_family == AF_INET) { 901 SCTP_INP_RUNLOCK(inp); 902 SCTP_ASOC_CREATE_UNLOCK(inp); 903 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 904 return (EINVAL); 905 } 906 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 907 SCTP_INP_RUNLOCK(inp); 908 SCTP_ASOC_CREATE_UNLOCK(inp); 909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 910 return (EINVAL); 911 } 912 } 913 if ((addr->sa_family == AF_INET6) && 914 IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 915 /* convert v4-mapped into v4 addr */ 916 in6_sin6_2_sin(&store.sin, sin6); 917 addr = &store.sa; 918 } 919 #endif /* INET */ 920 /* Now do we connect? */ 921 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 922 stcb = LIST_FIRST(&inp->sctp_asoc_list); 923 if (stcb) { 924 SCTP_TCB_LOCK(stcb); 925 } 926 SCTP_INP_RUNLOCK(inp); 927 } else { 928 SCTP_INP_RUNLOCK(inp); 929 SCTP_INP_WLOCK(inp); 930 SCTP_INP_INCR_REF(inp); 931 SCTP_INP_WUNLOCK(inp); 932 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 933 if (stcb == NULL) { 934 SCTP_INP_WLOCK(inp); 935 SCTP_INP_DECR_REF(inp); 936 SCTP_INP_WUNLOCK(inp); 937 } 938 } 939 940 if (stcb != NULL) { 941 /* Already have or am bring up an association */ 942 SCTP_ASOC_CREATE_UNLOCK(inp); 943 SCTP_TCB_UNLOCK(stcb); 944 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 945 return (EALREADY); 946 } 947 /* We are GOOD to go */ 948 stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id, 949 inp->sctp_ep.pre_open_stream_count, 950 inp->sctp_ep.port, p, 951 SCTP_INITIALIZE_AUTH_PARAMS); 952 SCTP_ASOC_CREATE_UNLOCK(inp); 953 if (stcb == NULL) { 954 /* Gak! no memory */ 955 return (error); 956 } 957 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); 958 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 959 NET_EPOCH_ENTER(et); 960 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 961 SCTP_TCB_UNLOCK(stcb); 962 NET_EPOCH_EXIT(et); 963 return (error); 964 } 965 966 static int 967 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 968 { 969 struct sockaddr_in6 *sin6; 970 struct sctp_inpcb *inp; 971 uint32_t vrf_id; 972 struct sctp_ifa *sctp_ifa; 973 974 int error; 975 976 /* 977 * Do the malloc first in case it blocks. 978 */ 979 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 980 if (sin6 == NULL) 981 return (ENOMEM); 982 sin6->sin6_family = AF_INET6; 983 sin6->sin6_len = sizeof(*sin6); 984 985 inp = (struct sctp_inpcb *)so->so_pcb; 986 if (inp == NULL) { 987 SCTP_FREE_SONAME(sin6); 988 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 989 return (ECONNRESET); 990 } 991 SCTP_INP_RLOCK(inp); 992 sin6->sin6_port = inp->sctp_lport; 993 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 994 /* For the bound all case you get back 0 */ 995 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 996 struct sctp_tcb *stcb; 997 struct sockaddr_in6 *sin_a6; 998 struct sctp_nets *net; 999 int fnd; 1000 1001 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1002 if (stcb == NULL) { 1003 SCTP_INP_RUNLOCK(inp); 1004 SCTP_FREE_SONAME(sin6); 1005 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1006 return (ENOENT); 1007 } 1008 fnd = 0; 1009 sin_a6 = NULL; 1010 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1011 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1012 if (sin_a6 == NULL) 1013 /* this will make coverity happy */ 1014 continue; 1015 1016 if (sin_a6->sin6_family == AF_INET6) { 1017 fnd = 1; 1018 break; 1019 } 1020 } 1021 if ((!fnd) || (sin_a6 == NULL)) { 1022 /* punt */ 1023 SCTP_INP_RUNLOCK(inp); 1024 SCTP_FREE_SONAME(sin6); 1025 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1026 return (ENOENT); 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 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1036 } 1037 } else { 1038 /* Take the first IPv6 address in the list */ 1039 struct sctp_laddr *laddr; 1040 int fnd = 0; 1041 1042 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1043 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1044 struct sockaddr_in6 *sin_a; 1045 1046 sin_a = &laddr->ifa->address.sin6; 1047 sin6->sin6_addr = sin_a->sin6_addr; 1048 fnd = 1; 1049 break; 1050 } 1051 } 1052 if (!fnd) { 1053 SCTP_FREE_SONAME(sin6); 1054 SCTP_INP_RUNLOCK(inp); 1055 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1056 return (ENOENT); 1057 } 1058 } 1059 SCTP_INP_RUNLOCK(inp); 1060 /* Scoping things for v6 */ 1061 if ((error = sa6_recoverscope(sin6)) != 0) { 1062 SCTP_FREE_SONAME(sin6); 1063 return (error); 1064 } 1065 (*addr) = (struct sockaddr *)sin6; 1066 return (0); 1067 } 1068 1069 static int 1070 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1071 { 1072 struct sockaddr_in6 *sin6; 1073 int fnd; 1074 struct sockaddr_in6 *sin_a6; 1075 struct sctp_inpcb *inp; 1076 struct sctp_tcb *stcb; 1077 struct sctp_nets *net; 1078 int error; 1079 1080 /* Do the malloc first in case it blocks. */ 1081 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1082 if (sin6 == NULL) 1083 return (ENOMEM); 1084 sin6->sin6_family = AF_INET6; 1085 sin6->sin6_len = sizeof(*sin6); 1086 1087 inp = (struct sctp_inpcb *)so->so_pcb; 1088 if ((inp == NULL) || 1089 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1090 /* UDP type and listeners will drop out here */ 1091 SCTP_FREE_SONAME(sin6); 1092 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1093 return (ENOTCONN); 1094 } 1095 SCTP_INP_RLOCK(inp); 1096 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1097 if (stcb) { 1098 SCTP_TCB_LOCK(stcb); 1099 } 1100 SCTP_INP_RUNLOCK(inp); 1101 if (stcb == NULL) { 1102 SCTP_FREE_SONAME(sin6); 1103 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1104 return (ECONNRESET); 1105 } 1106 fnd = 0; 1107 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1108 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1109 if (sin_a6->sin6_family == AF_INET6) { 1110 fnd = 1; 1111 sin6->sin6_port = stcb->rport; 1112 sin6->sin6_addr = sin_a6->sin6_addr; 1113 break; 1114 } 1115 } 1116 SCTP_TCB_UNLOCK(stcb); 1117 if (!fnd) { 1118 /* No IPv4 address */ 1119 SCTP_FREE_SONAME(sin6); 1120 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1121 return (ENOENT); 1122 } 1123 if ((error = sa6_recoverscope(sin6)) != 0) { 1124 SCTP_FREE_SONAME(sin6); 1125 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1126 return (error); 1127 } 1128 *addr = (struct sockaddr *)sin6; 1129 return (0); 1130 } 1131 1132 static int 1133 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1134 { 1135 struct inpcb *inp = sotoinpcb(so); 1136 int error; 1137 1138 if (inp == NULL) { 1139 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1140 return (EINVAL); 1141 } 1142 1143 /* allow v6 addresses precedence */ 1144 error = sctp6_getaddr(so, nam); 1145 #ifdef INET 1146 if (error) { 1147 struct sockaddr_in6 *sin6; 1148 1149 /* try v4 next if v6 failed */ 1150 error = sctp_ingetaddr(so, nam); 1151 if (error) { 1152 return (error); 1153 } 1154 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1155 if (sin6 == NULL) { 1156 SCTP_FREE_SONAME(*nam); 1157 return (ENOMEM); 1158 } 1159 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1160 SCTP_FREE_SONAME(*nam); 1161 *nam = (struct sockaddr *)sin6; 1162 } 1163 #endif 1164 return (error); 1165 } 1166 1167 static int 1168 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1169 { 1170 struct inpcb *inp = sotoinpcb(so); 1171 int error; 1172 1173 if (inp == NULL) { 1174 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1175 return (EINVAL); 1176 } 1177 1178 /* allow v6 addresses precedence */ 1179 error = sctp6_peeraddr(so, nam); 1180 #ifdef INET 1181 if (error) { 1182 struct sockaddr_in6 *sin6; 1183 1184 /* try v4 next if v6 failed */ 1185 error = sctp_peeraddr(so, nam); 1186 if (error) { 1187 return (error); 1188 } 1189 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1190 if (sin6 == NULL) { 1191 SCTP_FREE_SONAME(*nam); 1192 return (ENOMEM); 1193 } 1194 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1195 SCTP_FREE_SONAME(*nam); 1196 *nam = (struct sockaddr *)sin6; 1197 } 1198 #endif 1199 return (error); 1200 } 1201 1202 struct pr_usrreqs sctp6_usrreqs = { 1203 .pru_abort = sctp6_abort, 1204 .pru_accept = sctp_accept, 1205 .pru_attach = sctp6_attach, 1206 .pru_bind = sctp6_bind, 1207 .pru_connect = sctp6_connect, 1208 .pru_control = in6_control, 1209 .pru_close = sctp6_close, 1210 .pru_detach = sctp6_close, 1211 .pru_sopoll = sopoll_generic, 1212 .pru_flush = sctp_flush, 1213 .pru_disconnect = sctp6_disconnect, 1214 .pru_listen = sctp_listen, 1215 .pru_peeraddr = sctp6_getpeeraddr, 1216 .pru_send = sctp6_send, 1217 .pru_shutdown = sctp_shutdown, 1218 .pru_sockaddr = sctp6_in6getaddr, 1219 .pru_sosend = sctp_sosend, 1220 .pru_soreceive = sctp_soreceive 1221 }; 1222 1223 #endif 1224