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 int 636 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 637 struct mbuf *control, struct thread *p); 638 639 static int 640 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 641 struct mbuf *control, struct thread *p) 642 { 643 struct sctp_inpcb *inp; 644 645 #ifdef INET 646 struct sockaddr_in6 *sin6; 647 #endif /* INET */ 648 /* No SPL needed since sctp_output does this */ 649 650 inp = (struct sctp_inpcb *)so->so_pcb; 651 if (inp == NULL) { 652 if (control) { 653 SCTP_RELEASE_PKT(control); 654 control = NULL; 655 } 656 SCTP_RELEASE_PKT(m); 657 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 658 return (EINVAL); 659 } 660 /* 661 * For the TCP model we may get a NULL addr, if we are a connected 662 * socket thats ok. 663 */ 664 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 665 (addr == NULL)) { 666 goto connected_type; 667 } 668 if (addr == NULL) { 669 SCTP_RELEASE_PKT(m); 670 if (control) { 671 SCTP_RELEASE_PKT(control); 672 control = NULL; 673 } 674 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); 675 return (EDESTADDRREQ); 676 } 677 switch (addr->sa_family) { 678 #ifdef INET 679 case AF_INET: 680 if (addr->sa_len != sizeof(struct sockaddr_in)) { 681 if (control) { 682 SCTP_RELEASE_PKT(control); 683 control = NULL; 684 } 685 SCTP_RELEASE_PKT(m); 686 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 687 return (EINVAL); 688 } 689 break; 690 #endif 691 #ifdef INET6 692 case AF_INET6: 693 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 694 if (control) { 695 SCTP_RELEASE_PKT(control); 696 control = NULL; 697 } 698 SCTP_RELEASE_PKT(m); 699 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 700 return (EINVAL); 701 } 702 break; 703 #endif 704 default: 705 if (control) { 706 SCTP_RELEASE_PKT(control); 707 control = NULL; 708 } 709 SCTP_RELEASE_PKT(m); 710 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 711 return (EINVAL); 712 } 713 #ifdef INET 714 sin6 = (struct sockaddr_in6 *)addr; 715 if (SCTP_IPV6_V6ONLY(inp)) { 716 /* 717 * if IPV6_V6ONLY flag, we discard datagrams destined to a 718 * v4 addr or v4-mapped addr 719 */ 720 if (addr->sa_family == AF_INET) { 721 if (control) { 722 SCTP_RELEASE_PKT(control); 723 control = NULL; 724 } 725 SCTP_RELEASE_PKT(m); 726 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 727 return (EINVAL); 728 } 729 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 730 if (control) { 731 SCTP_RELEASE_PKT(control); 732 control = NULL; 733 } 734 SCTP_RELEASE_PKT(m); 735 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 736 return (EINVAL); 737 } 738 } 739 if ((addr->sa_family == AF_INET6) && 740 IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 741 struct sockaddr_in sin; 742 743 /* convert v4-mapped into v4 addr and send */ 744 in6_sin6_2_sin(&sin, sin6); 745 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); 746 } 747 #endif /* INET */ 748 connected_type: 749 /* now what about control */ 750 if (control) { 751 if (inp->control) { 752 SCTP_PRINTF("huh? control set?\n"); 753 SCTP_RELEASE_PKT(inp->control); 754 inp->control = NULL; 755 } 756 inp->control = control; 757 } 758 /* Place the data */ 759 if (inp->pkt) { 760 SCTP_BUF_NEXT(inp->pkt_last) = m; 761 inp->pkt_last = m; 762 } else { 763 inp->pkt_last = inp->pkt = m; 764 } 765 if ( 766 /* FreeBSD and MacOSX uses a flag passed */ 767 ((flags & PRUS_MORETOCOME) == 0) 768 ) { 769 /* 770 * note with the current version this code will only be used 771 * by OpenBSD, NetBSD and FreeBSD have methods for 772 * re-defining sosend() to use sctp_sosend(). One can 773 * optionaly switch back to this code (by changing back the 774 * defininitions but this is not advisable. 775 */ 776 struct epoch_tracker et; 777 int ret; 778 779 NET_EPOCH_ENTER(et); 780 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 781 NET_EPOCH_EXIT(et); 782 inp->pkt = NULL; 783 inp->control = NULL; 784 return (ret); 785 } else { 786 return (0); 787 } 788 } 789 790 static int 791 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 792 { 793 struct epoch_tracker et; 794 uint32_t vrf_id; 795 int error = 0; 796 struct sctp_inpcb *inp; 797 struct sctp_tcb *stcb; 798 #ifdef INET 799 struct sockaddr_in6 *sin6; 800 union sctp_sockstore store; 801 #endif 802 803 inp = (struct sctp_inpcb *)so->so_pcb; 804 if (inp == NULL) { 805 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 806 return (ECONNRESET); /* I made the same as TCP since we are 807 * not setup? */ 808 } 809 if (addr == NULL) { 810 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 811 return (EINVAL); 812 } 813 switch (addr->sa_family) { 814 #ifdef INET 815 case AF_INET: 816 if (addr->sa_len != sizeof(struct sockaddr_in)) { 817 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 818 return (EINVAL); 819 } 820 break; 821 #endif 822 #ifdef INET6 823 case AF_INET6: 824 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 825 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 826 return (EINVAL); 827 } 828 break; 829 #endif 830 default: 831 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 832 return (EINVAL); 833 } 834 835 vrf_id = inp->def_vrf_id; 836 SCTP_ASOC_CREATE_LOCK(inp); 837 SCTP_INP_RLOCK(inp); 838 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 839 SCTP_PCB_FLAGS_UNBOUND) { 840 /* Bind a ephemeral port */ 841 SCTP_INP_RUNLOCK(inp); 842 error = sctp6_bind(so, NULL, p); 843 if (error) { 844 SCTP_ASOC_CREATE_UNLOCK(inp); 845 846 return (error); 847 } 848 SCTP_INP_RLOCK(inp); 849 } 850 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 851 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 852 /* We are already connected AND the TCP model */ 853 SCTP_INP_RUNLOCK(inp); 854 SCTP_ASOC_CREATE_UNLOCK(inp); 855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); 856 return (EADDRINUSE); 857 } 858 #ifdef INET 859 sin6 = (struct sockaddr_in6 *)addr; 860 if (SCTP_IPV6_V6ONLY(inp)) { 861 /* 862 * if IPV6_V6ONLY flag, ignore connections destined to a v4 863 * addr or v4-mapped addr 864 */ 865 if (addr->sa_family == AF_INET) { 866 SCTP_INP_RUNLOCK(inp); 867 SCTP_ASOC_CREATE_UNLOCK(inp); 868 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 869 return (EINVAL); 870 } 871 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 872 SCTP_INP_RUNLOCK(inp); 873 SCTP_ASOC_CREATE_UNLOCK(inp); 874 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 875 return (EINVAL); 876 } 877 } 878 if ((addr->sa_family == AF_INET6) && 879 IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 880 /* convert v4-mapped into v4 addr */ 881 in6_sin6_2_sin(&store.sin, sin6); 882 addr = &store.sa; 883 } 884 #endif /* INET */ 885 /* Now do we connect? */ 886 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 887 stcb = LIST_FIRST(&inp->sctp_asoc_list); 888 if (stcb) { 889 SCTP_TCB_LOCK(stcb); 890 } 891 SCTP_INP_RUNLOCK(inp); 892 } else { 893 SCTP_INP_RUNLOCK(inp); 894 SCTP_INP_WLOCK(inp); 895 SCTP_INP_INCR_REF(inp); 896 SCTP_INP_WUNLOCK(inp); 897 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 898 if (stcb == NULL) { 899 SCTP_INP_WLOCK(inp); 900 SCTP_INP_DECR_REF(inp); 901 SCTP_INP_WUNLOCK(inp); 902 } 903 } 904 905 if (stcb != NULL) { 906 /* Already have or am bring up an association */ 907 SCTP_ASOC_CREATE_UNLOCK(inp); 908 SCTP_TCB_UNLOCK(stcb); 909 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); 910 return (EALREADY); 911 } 912 /* We are GOOD to go */ 913 stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id, 914 inp->sctp_ep.pre_open_stream_count, 915 inp->sctp_ep.port, p, 916 SCTP_INITIALIZE_AUTH_PARAMS); 917 SCTP_ASOC_CREATE_UNLOCK(inp); 918 if (stcb == NULL) { 919 /* Gak! no memory */ 920 return (error); 921 } 922 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); 923 (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 924 NET_EPOCH_ENTER(et); 925 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 926 SCTP_TCB_UNLOCK(stcb); 927 NET_EPOCH_EXIT(et); 928 return (error); 929 } 930 931 static int 932 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 933 { 934 struct sockaddr_in6 *sin6; 935 struct sctp_inpcb *inp; 936 uint32_t vrf_id; 937 struct sctp_ifa *sctp_ifa; 938 939 int error; 940 941 /* 942 * Do the malloc first in case it blocks. 943 */ 944 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); 945 if (sin6 == NULL) 946 return (ENOMEM); 947 sin6->sin6_family = AF_INET6; 948 sin6->sin6_len = sizeof(*sin6); 949 950 inp = (struct sctp_inpcb *)so->so_pcb; 951 if (inp == NULL) { 952 SCTP_FREE_SONAME(sin6); 953 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 954 return (ECONNRESET); 955 } 956 SCTP_INP_RLOCK(inp); 957 sin6->sin6_port = inp->sctp_lport; 958 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 959 /* For the bound all case you get back 0 */ 960 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 961 struct sctp_tcb *stcb; 962 struct sockaddr_in6 *sin_a6; 963 struct sctp_nets *net; 964 int fnd; 965 966 stcb = LIST_FIRST(&inp->sctp_asoc_list); 967 if (stcb == NULL) { 968 SCTP_INP_RUNLOCK(inp); 969 SCTP_FREE_SONAME(sin6); 970 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 971 return (ENOENT); 972 } 973 fnd = 0; 974 sin_a6 = NULL; 975 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 976 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 977 if (sin_a6 == NULL) 978 /* this will make coverity happy */ 979 continue; 980 981 if (sin_a6->sin6_family == AF_INET6) { 982 fnd = 1; 983 break; 984 } 985 } 986 if ((!fnd) || (sin_a6 == NULL)) { 987 /* punt */ 988 SCTP_INP_RUNLOCK(inp); 989 SCTP_FREE_SONAME(sin6); 990 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 991 return (ENOENT); 992 } 993 vrf_id = inp->def_vrf_id; 994 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); 995 if (sctp_ifa) { 996 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 997 } 998 } else { 999 /* For the bound all case you get back 0 */ 1000 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1001 } 1002 } else { 1003 /* Take the first IPv6 address in the list */ 1004 struct sctp_laddr *laddr; 1005 int fnd = 0; 1006 1007 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1008 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1009 struct sockaddr_in6 *sin_a; 1010 1011 sin_a = &laddr->ifa->address.sin6; 1012 sin6->sin6_addr = sin_a->sin6_addr; 1013 fnd = 1; 1014 break; 1015 } 1016 } 1017 if (!fnd) { 1018 SCTP_FREE_SONAME(sin6); 1019 SCTP_INP_RUNLOCK(inp); 1020 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1021 return (ENOENT); 1022 } 1023 } 1024 SCTP_INP_RUNLOCK(inp); 1025 /* Scoping things for v6 */ 1026 if ((error = sa6_recoverscope(sin6)) != 0) { 1027 SCTP_FREE_SONAME(sin6); 1028 return (error); 1029 } 1030 (*addr) = (struct sockaddr *)sin6; 1031 return (0); 1032 } 1033 1034 static int 1035 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1036 { 1037 struct sockaddr_in6 *sin6; 1038 int fnd; 1039 struct sockaddr_in6 *sin_a6; 1040 struct sctp_inpcb *inp; 1041 struct sctp_tcb *stcb; 1042 struct sctp_nets *net; 1043 int error; 1044 1045 /* Do the malloc first in case it blocks. */ 1046 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1047 if (sin6 == NULL) 1048 return (ENOMEM); 1049 sin6->sin6_family = AF_INET6; 1050 sin6->sin6_len = sizeof(*sin6); 1051 1052 inp = (struct sctp_inpcb *)so->so_pcb; 1053 if ((inp == NULL) || 1054 ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { 1055 /* UDP type and listeners will drop out here */ 1056 SCTP_FREE_SONAME(sin6); 1057 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); 1058 return (ENOTCONN); 1059 } 1060 SCTP_INP_RLOCK(inp); 1061 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1062 if (stcb) { 1063 SCTP_TCB_LOCK(stcb); 1064 } 1065 SCTP_INP_RUNLOCK(inp); 1066 if (stcb == NULL) { 1067 SCTP_FREE_SONAME(sin6); 1068 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); 1069 return (ECONNRESET); 1070 } 1071 fnd = 0; 1072 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1073 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1074 if (sin_a6->sin6_family == AF_INET6) { 1075 fnd = 1; 1076 sin6->sin6_port = stcb->rport; 1077 sin6->sin6_addr = sin_a6->sin6_addr; 1078 break; 1079 } 1080 } 1081 SCTP_TCB_UNLOCK(stcb); 1082 if (!fnd) { 1083 /* No IPv4 address */ 1084 SCTP_FREE_SONAME(sin6); 1085 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); 1086 return (ENOENT); 1087 } 1088 if ((error = sa6_recoverscope(sin6)) != 0) { 1089 SCTP_FREE_SONAME(sin6); 1090 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); 1091 return (error); 1092 } 1093 *addr = (struct sockaddr *)sin6; 1094 return (0); 1095 } 1096 1097 static int 1098 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1099 { 1100 struct inpcb *inp = sotoinpcb(so); 1101 int error; 1102 1103 if (inp == NULL) { 1104 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); 1105 return (EINVAL); 1106 } 1107 1108 /* allow v6 addresses precedence */ 1109 error = sctp6_getaddr(so, nam); 1110 #ifdef INET 1111 if (error) { 1112 struct sockaddr_in6 *sin6; 1113 1114 /* try v4 next if v6 failed */ 1115 error = sctp_ingetaddr(so, nam); 1116 if (error) { 1117 return (error); 1118 } 1119 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1120 if (sin6 == NULL) { 1121 SCTP_FREE_SONAME(*nam); 1122 return (ENOMEM); 1123 } 1124 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); 1125 SCTP_FREE_SONAME(*nam); 1126 *nam = (struct sockaddr *)sin6; 1127 } 1128 #endif 1129 return (error); 1130 } 1131 1132 static int 1133 sctp6_getpeeraddr(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_peeraddr(so, nam); 1145 #ifdef INET 1146 if (error) { 1147 struct sockaddr_in6 *sin6; 1148 1149 /* try v4 next if v6 failed */ 1150 error = sctp_peeraddr(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 #define SCTP6_PROTOSW \ 1168 .pr_protocol = IPPROTO_SCTP, \ 1169 .pr_ctloutput = sctp_ctloutput, \ 1170 .pr_abort = sctp6_abort, \ 1171 .pr_accept = sctp_accept, \ 1172 .pr_attach = sctp6_attach, \ 1173 .pr_bind = sctp6_bind, \ 1174 .pr_connect = sctp6_connect, \ 1175 .pr_control = in6_control, \ 1176 .pr_close = sctp6_close, \ 1177 .pr_detach = sctp6_close, \ 1178 .pr_sopoll = sopoll_generic, \ 1179 .pr_flush = sctp_flush, \ 1180 .pr_disconnect = sctp_disconnect, \ 1181 .pr_listen = sctp_listen, \ 1182 .pr_peeraddr = sctp6_getpeeraddr, \ 1183 .pr_send = sctp6_send, \ 1184 .pr_shutdown = sctp_shutdown, \ 1185 .pr_sockaddr = sctp6_in6getaddr, \ 1186 .pr_sosend = sctp_sosend, \ 1187 .pr_soreceive = sctp_soreceive 1188 1189 struct protosw sctp6_seqpacket_protosw = { 1190 .pr_type = SOCK_SEQPACKET, 1191 .pr_flags = PR_WANTRCVD, 1192 SCTP6_PROTOSW 1193 }; 1194 1195 struct protosw sctp6_stream_protosw = { 1196 .pr_type = SOCK_STREAM, 1197 .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD, 1198 SCTP6_PROTOSW 1199 }; 1200 #endif 1201