1 /*- 2 * Copyright (c) 2001-2007, Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 /* $KAME: sctp6_usrreq.c,v 1.38 2005/08/24 08:08:56 suz Exp $ */ 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <netinet/sctp_os.h> 35 #include <sys/proc.h> 36 #include <netinet/sctp_pcb.h> 37 #include <netinet/sctp_header.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_output.h> 41 #include <netinet/sctp_input.h> 42 #include <netinet/sctp_bsd_addr.h> 43 #include <netinet/sctp_uio.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctputil.h> 46 #include <netinet/sctp_indata.h> 47 #include <netinet/sctp_asconf.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_auth.h> 50 #include <netinet6/sctp6_var.h> 51 52 53 54 extern struct protosw inetsw[]; 55 56 57 58 int 59 sctp6_input(mp, offp, proto) 60 struct mbuf **mp; 61 int *offp; 62 int proto; 63 { 64 struct mbuf *m; 65 struct ip6_hdr *ip6; 66 struct sctphdr *sh; 67 struct sctp_inpcb *in6p = NULL; 68 struct sctp_nets *net; 69 int refcount_up = 0; 70 uint32_t check, calc_check, vrf_id; 71 struct inpcb *in6p_ip; 72 struct sctp_chunkhdr *ch; 73 int length, mlen, offset, iphlen; 74 uint8_t ecn_bits; 75 struct sctp_tcb *stcb = NULL; 76 int off = *offp; 77 78 vrf_id = SCTP_DEFAULT_VRFID; 79 m = SCTP_HEADER_TO_CHAIN(*mp); 80 81 ip6 = mtod(m, struct ip6_hdr *); 82 /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ 83 IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, sizeof(*sh) + sizeof(*ch)); 84 if (sh == NULL) { 85 SCTP_STAT_INCR(sctps_hdrops); 86 return IPPROTO_DONE; 87 } 88 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 89 iphlen = off; 90 offset = iphlen + sizeof(*sh) + sizeof(*ch); 91 92 #if defined(NFAITH) && NFAITH > 0 93 94 if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { 95 /* XXX send icmp6 host/port unreach? */ 96 goto bad; 97 } 98 #endif /* NFAITH defined and > 0 */ 99 SCTP_STAT_INCR(sctps_recvpackets); 100 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 101 #ifdef SCTP_DEBUG 102 if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 103 printf("V6 input gets a packet iphlen:%d pktlen:%d\n", iphlen, SCTP_HEADER_LEN((*mp))); 104 } 105 #endif 106 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 107 /* No multi-cast support in SCTP */ 108 goto bad; 109 } 110 /* destination port of 0 is illegal, based on RFC2960. */ 111 if (sh->dest_port == 0) 112 goto bad; 113 if ((sctp_no_csum_on_loopback == 0) || 114 (!SCTP_IS_IT_LOOPBACK(m))) { 115 /* 116 * we do NOT validate things from the loopback if the sysctl 117 * is set to 1. 118 */ 119 check = sh->checksum; /* save incoming checksum */ 120 if ((check == 0) && (sctp_no_csum_on_loopback)) { 121 /* 122 * special hook for where we got a local address 123 * somehow routed across a non IFT_LOOP type 124 * interface 125 */ 126 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst)) 127 goto sctp_skip_csum; 128 } 129 sh->checksum = 0; /* prepare for calc */ 130 calc_check = sctp_calculate_sum(m, &mlen, iphlen); 131 if (calc_check != check) { 132 #ifdef SCTP_DEBUG 133 if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 134 printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n", 135 calc_check, check, m, 136 mlen, iphlen); 137 } 138 #endif 139 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 140 sh, ch, &in6p, &net, vrf_id); 141 /* in6p's ref-count increased && stcb locked */ 142 if ((in6p) && (stcb)) { 143 sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 144 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2); 145 } else if ((in6p != NULL) && (stcb == NULL)) { 146 refcount_up = 1; 147 } 148 SCTP_STAT_INCR(sctps_badsum); 149 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 150 goto bad; 151 } 152 sh->checksum = calc_check; 153 } 154 sctp_skip_csum: 155 net = NULL; 156 /* 157 * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 158 * IP/SCTP/first chunk header... 159 */ 160 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 161 sh, ch, &in6p, &net, vrf_id); 162 /* in6p's ref-count increased */ 163 if (in6p == NULL) { 164 struct sctp_init_chunk *init_chk, chunk_buf; 165 166 SCTP_STAT_INCR(sctps_noport); 167 if (ch->chunk_type == SCTP_INITIATION) { 168 /* 169 * we do a trick here to get the INIT tag, dig in 170 * and get the tag from the INIT and put it in the 171 * common header. 172 */ 173 init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 174 iphlen + sizeof(*sh), sizeof(*init_chk), 175 (uint8_t *) & chunk_buf); 176 sh->v_tag = init_chk->init.initiate_tag; 177 } 178 if (ch->chunk_type == SCTP_SHUTDOWN_ACK) { 179 sctp_send_shutdown_complete2(m, iphlen, sh); 180 goto bad; 181 } 182 if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) { 183 goto bad; 184 } 185 if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) 186 sctp_send_abort(m, iphlen, sh, 0, NULL); 187 goto bad; 188 } else if (stcb == NULL) { 189 refcount_up = 1; 190 } 191 in6p_ip = (struct inpcb *)in6p; 192 #ifdef IPSEC 193 /* 194 * Check AH/ESP integrity. 195 */ 196 if (in6p_ip && (ipsec6_in_reject(m, in6p_ip))) { 197 /* XXX */ 198 ipsec6stat.in_polvio++; 199 goto bad; 200 } 201 #endif /* IPSEC */ 202 203 204 /* 205 * CONTROL chunk processing 206 */ 207 offset -= sizeof(*ch); 208 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 209 210 /* Length now holds the total packet length payload + iphlen */ 211 length = ntohs(ip6->ip6_plen) + iphlen; 212 213 (void)sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 214 in6p, stcb, net, ecn_bits); 215 /* inp's ref-count reduced && stcb unlocked */ 216 /* XXX this stuff below gets moved to appropriate parts later... */ 217 if (m) 218 m_freem(m); 219 if ((in6p) && refcount_up) { 220 /* reduce ref-count */ 221 SCTP_INP_WLOCK(in6p); 222 SCTP_INP_DECR_REF(in6p); 223 SCTP_INP_WUNLOCK(in6p); 224 } 225 return IPPROTO_DONE; 226 227 bad: 228 if (stcb) 229 SCTP_TCB_UNLOCK(stcb); 230 231 if ((in6p) && refcount_up) { 232 /* reduce ref-count */ 233 SCTP_INP_WLOCK(in6p); 234 SCTP_INP_DECR_REF(in6p); 235 SCTP_INP_WUNLOCK(in6p); 236 } 237 if (m) 238 m_freem(m); 239 return IPPROTO_DONE; 240 } 241 242 243 static void 244 sctp6_notify_mbuf(struct sctp_inpcb *inp, 245 struct icmp6_hdr *icmp6, 246 struct sctphdr *sh, 247 struct sctp_tcb *stcb, 248 struct sctp_nets *net) 249 { 250 uint32_t nxtsz; 251 252 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 253 (icmp6 == NULL) || (sh == NULL)) { 254 goto out; 255 } 256 /* First do we even look at it? */ 257 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 258 goto out; 259 260 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 261 /* not PACKET TO BIG */ 262 goto out; 263 } 264 /* 265 * ok we need to look closely. We could even get smarter and look at 266 * anyone that we sent to in case we get a different ICMP that tells 267 * us there is no way to reach a host, but for this impl, all we 268 * care about is MTU discovery. 269 */ 270 nxtsz = ntohl(icmp6->icmp6_mtu); 271 /* Stop any PMTU timer */ 272 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL, SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_1); 273 274 /* Adjust destination size limit */ 275 if (net->mtu > nxtsz) { 276 net->mtu = nxtsz; 277 } 278 /* now what about the ep? */ 279 if (stcb->asoc.smallest_mtu > nxtsz) { 280 struct sctp_tmit_chunk *chk; 281 282 /* Adjust that too */ 283 stcb->asoc.smallest_mtu = nxtsz; 284 /* now off to subtract IP_DF flag if needed */ 285 286 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 287 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 288 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 289 } 290 } 291 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 292 if ((uint32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 293 /* 294 * For this guy we also mark for immediate 295 * resend since we sent to big of chunk 296 */ 297 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 298 if (chk->sent != SCTP_DATAGRAM_RESEND) 299 stcb->asoc.sent_queue_retran_cnt++; 300 chk->sent = SCTP_DATAGRAM_RESEND; 301 chk->rec.data.doing_fast_retransmit = 0; 302 303 chk->sent = SCTP_DATAGRAM_RESEND; 304 /* Clear any time so NO RTT is being done */ 305 chk->sent_rcv_time.tv_sec = 0; 306 chk->sent_rcv_time.tv_usec = 0; 307 stcb->asoc.total_flight -= chk->send_size; 308 net->flight_size -= chk->send_size; 309 } 310 } 311 } 312 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 313 out: 314 if (stcb) 315 SCTP_TCB_UNLOCK(stcb); 316 } 317 318 319 void 320 sctp6_ctlinput(cmd, pktdst, d) 321 int cmd; 322 struct sockaddr *pktdst; 323 void *d; 324 { 325 struct sctphdr sh; 326 struct ip6ctlparam *ip6cp = NULL; 327 uint32_t vrf_id; 328 int cm; 329 330 vrf_id = SCTP_DEFAULT_VRFID; 331 332 if (pktdst->sa_family != AF_INET6 || 333 pktdst->sa_len != sizeof(struct sockaddr_in6)) 334 return; 335 336 if ((unsigned)cmd >= PRC_NCMDS) 337 return; 338 if (PRC_IS_REDIRECT(cmd)) { 339 d = NULL; 340 } else if (inet6ctlerrmap[cmd] == 0) { 341 return; 342 } 343 /* if the parameter is from icmp6, decode it. */ 344 if (d != NULL) { 345 ip6cp = (struct ip6ctlparam *)d; 346 } else { 347 ip6cp = (struct ip6ctlparam *)NULL; 348 } 349 350 if (ip6cp) { 351 /* 352 * XXX: We assume that when IPV6 is non NULL, M and OFF are 353 * valid. 354 */ 355 /* check if we can safely examine src and dst ports */ 356 struct sctp_inpcb *inp = NULL; 357 struct sctp_tcb *stcb = NULL; 358 struct sctp_nets *net = NULL; 359 struct sockaddr_in6 final; 360 361 if (ip6cp->ip6c_m == NULL) 362 return; 363 364 bzero(&sh, sizeof(sh)); 365 bzero(&final, sizeof(final)); 366 inp = NULL; 367 net = NULL; 368 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 369 (caddr_t)&sh); 370 ip6cp->ip6c_src->sin6_port = sh.src_port; 371 final.sin6_len = sizeof(final); 372 final.sin6_family = AF_INET6; 373 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 374 final.sin6_port = sh.dest_port; 375 stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 376 (struct sockaddr *)&final, 377 &inp, &net, 1, vrf_id); 378 /* inp's ref-count increased && stcb locked */ 379 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 380 if (cmd == PRC_MSGSIZE) { 381 sctp6_notify_mbuf(inp, 382 ip6cp->ip6c_icmp6, 383 &sh, 384 stcb, 385 net); 386 /* inp's ref-count reduced && stcb unlocked */ 387 } else { 388 if (cmd == PRC_HOSTDEAD) { 389 cm = EHOSTUNREACH; 390 } else { 391 cm = inet6ctlerrmap[cmd]; 392 } 393 sctp_notify(inp, cm, &sh, 394 (struct sockaddr *)&final, 395 stcb, net); 396 /* inp's ref-count reduced && stcb unlocked */ 397 } 398 } else { 399 if (PRC_IS_REDIRECT(cmd) && inp) { 400 in6_rtchange((struct in6pcb *)inp, 401 inet6ctlerrmap[cmd]); 402 } 403 if (inp) { 404 /* reduce inp's ref-count */ 405 SCTP_INP_WLOCK(inp); 406 SCTP_INP_DECR_REF(inp); 407 SCTP_INP_WUNLOCK(inp); 408 } 409 if (stcb) 410 SCTP_TCB_UNLOCK(stcb); 411 } 412 } 413 } 414 415 /* 416 * this routine can probably be collasped into the one in sctp_userreq.c 417 * since they do the same thing and now we lookup with a sockaddr 418 */ 419 static int 420 sctp6_getcred(SYSCTL_HANDLER_ARGS) 421 { 422 struct xucred xuc; 423 struct sockaddr_in6 addrs[2]; 424 struct sctp_inpcb *inp; 425 struct sctp_nets *net; 426 struct sctp_tcb *stcb; 427 int error; 428 uint32_t vrf_id; 429 430 vrf_id = SCTP_DEFAULT_VRFID; 431 432 /* 433 * XXXRW: Other instances of getcred use SUSER_ALLOWJAIL, as socket 434 * visibility is scoped using cr_canseesocket(), which it is not 435 * here. 436 */ 437 error = priv_check_cred(req->td->td_ucred, PRIV_NETINET_RESERVEDPORT, 438 0); 439 if (error) 440 return (error); 441 442 if (req->newlen != sizeof(addrs)) 443 return (EINVAL); 444 if (req->oldlen != sizeof(struct ucred)) 445 return (EINVAL); 446 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 447 if (error) 448 return (error); 449 450 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 451 sin6tosa(&addrs[1]), 452 &inp, &net, 1, vrf_id); 453 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 454 if ((inp != NULL) && (stcb == NULL)) { 455 /* reduce ref-count */ 456 SCTP_INP_WLOCK(inp); 457 SCTP_INP_DECR_REF(inp); 458 goto cred_can_cont; 459 } 460 error = ENOENT; 461 goto out; 462 } 463 SCTP_TCB_UNLOCK(stcb); 464 /* 465 * We use the write lock here, only since in the error leg we need 466 * it. If we used RLOCK, then we would have to 467 * wlock/decr/unlock/rlock. Which in theory could create a hole. 468 * Better to use higher wlock. 469 */ 470 SCTP_INP_WLOCK(inp); 471 cred_can_cont: 472 error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); 473 if (error) { 474 SCTP_INP_WUNLOCK(inp); 475 goto out; 476 } 477 cru2x(inp->sctp_socket->so_cred, &xuc); 478 SCTP_INP_WUNLOCK(inp); 479 error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 480 out: 481 return (error); 482 } 483 484 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 485 0, 0, 486 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 487 488 489 /* This is the same as the sctp_abort() could be made common */ 490 static void 491 sctp6_abort(struct socket *so) 492 { 493 struct sctp_inpcb *inp; 494 uint32_t flags; 495 496 inp = (struct sctp_inpcb *)so->so_pcb; 497 if (inp == 0) 498 return; 499 sctp_must_try_again: 500 flags = inp->sctp_flags; 501 #ifdef SCTP_LOG_CLOSING 502 sctp_log_closing(inp, NULL, 17); 503 #endif 504 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 505 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 506 #ifdef SCTP_LOG_CLOSING 507 sctp_log_closing(inp, NULL, 16); 508 #endif 509 sctp_inpcb_free(inp, 1, 0); 510 SOCK_LOCK(so); 511 SCTP_SB_CLEAR(so->so_snd); 512 /* 513 * same for the rcv ones, they are only here for the 514 * accounting/select. 515 */ 516 SCTP_SB_CLEAR(so->so_rcv); 517 /* Now null out the reference, we are completely detached. */ 518 so->so_pcb = NULL; 519 SOCK_UNLOCK(so); 520 } else { 521 flags = inp->sctp_flags; 522 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 523 goto sctp_must_try_again; 524 } 525 } 526 return; 527 } 528 529 static int 530 sctp6_attach(struct socket *so, int proto, struct thread *p) 531 { 532 struct in6pcb *inp6; 533 int error; 534 struct sctp_inpcb *inp; 535 536 inp = (struct sctp_inpcb *)so->so_pcb; 537 if (inp != NULL) 538 return EINVAL; 539 540 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 541 error = SCTP_SORESERVE(so, sctp_sendspace, sctp_recvspace); 542 if (error) 543 return error; 544 } 545 error = sctp_inpcb_alloc(so); 546 if (error) 547 return error; 548 inp = (struct sctp_inpcb *)so->so_pcb; 549 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 550 inp6 = (struct in6pcb *)inp; 551 552 inp6->inp_vflag |= INP_IPV6; 553 inp6->in6p_hops = -1; /* use kernel default */ 554 inp6->in6p_cksum = -1; /* just to be sure */ 555 #ifdef INET 556 /* 557 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 558 * socket as well, because the socket may be bound to an IPv6 559 * wildcard address, which may match an IPv4-mapped IPv6 address. 560 */ 561 inp6->inp_ip_ttl = ip_defttl; 562 #endif 563 /* 564 * Hmm what about the IPSEC stuff that is missing here but in 565 * sctp_attach()? 566 */ 567 return 0; 568 } 569 570 static int 571 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 572 { 573 struct sctp_inpcb *inp; 574 struct in6pcb *inp6; 575 int error; 576 577 inp = (struct sctp_inpcb *)so->so_pcb; 578 if (inp == 0) 579 return EINVAL; 580 581 inp6 = (struct in6pcb *)inp; 582 inp6->inp_vflag &= ~INP_IPV4; 583 inp6->inp_vflag |= INP_IPV6; 584 if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) { 585 if (addr->sa_family == AF_INET) { 586 /* binding v4 addr to v6 socket, so reset flags */ 587 inp6->inp_vflag |= INP_IPV4; 588 inp6->inp_vflag &= ~INP_IPV6; 589 } else { 590 struct sockaddr_in6 *sin6_p; 591 592 sin6_p = (struct sockaddr_in6 *)addr; 593 594 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 595 inp6->inp_vflag |= INP_IPV4; 596 } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 597 struct sockaddr_in sin; 598 599 in6_sin6_2_sin(&sin, sin6_p); 600 inp6->inp_vflag |= INP_IPV4; 601 inp6->inp_vflag &= ~INP_IPV6; 602 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, p); 603 return error; 604 } 605 } 606 } else if (addr != NULL) { 607 /* IPV6_V6ONLY socket */ 608 if (addr->sa_family == AF_INET) { 609 /* can't bind v4 addr to v6 only socket! */ 610 return EINVAL; 611 } else { 612 struct sockaddr_in6 *sin6_p; 613 614 sin6_p = (struct sockaddr_in6 *)addr; 615 616 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) 617 /* can't bind v4-mapped addrs either! */ 618 /* NOTE: we don't support SIIT */ 619 return EINVAL; 620 } 621 } 622 error = sctp_inpcb_bind(so, addr, p); 623 return error; 624 } 625 626 627 static void 628 sctp6_close(struct socket *so) 629 { 630 struct sctp_inpcb *inp; 631 uint32_t flags; 632 633 inp = (struct sctp_inpcb *)so->so_pcb; 634 if (inp == 0) 635 return; 636 637 /* 638 * Inform all the lower layer assoc that we are done. 639 */ 640 sctp_must_try_again: 641 flags = inp->sctp_flags; 642 #ifdef SCTP_LOG_CLOSING 643 sctp_log_closing(inp, NULL, 17); 644 #endif 645 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 646 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 647 if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || 648 (so->so_rcv.sb_cc > 0)) { 649 #ifdef SCTP_LOG_CLOSING 650 sctp_log_closing(inp, NULL, 13); 651 #endif 652 sctp_inpcb_free(inp, 1, 1); 653 } else { 654 #ifdef SCTP_LOG_CLOSING 655 sctp_log_closing(inp, NULL, 14); 656 #endif 657 sctp_inpcb_free(inp, 0, 1); 658 } 659 /* 660 * The socket is now detached, no matter what the state of 661 * the SCTP association. 662 */ 663 SOCK_LOCK(so); 664 SCTP_SB_CLEAR(so->so_snd); 665 /* 666 * same for the rcv ones, they are only here for the 667 * accounting/select. 668 */ 669 SCTP_SB_CLEAR(so->so_rcv); 670 /* Now null out the reference, we are completely detached. */ 671 so->so_pcb = NULL; 672 SOCK_UNLOCK(so); 673 } else { 674 flags = inp->sctp_flags; 675 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 676 goto sctp_must_try_again; 677 } 678 } 679 return; 680 681 } 682 683 /* This could be made common with sctp_detach() since they are identical */ 684 685 static int 686 sctp6_disconnect(struct socket *so) 687 { 688 struct sctp_inpcb *inp; 689 690 inp = (struct sctp_inpcb *)so->so_pcb; 691 if (inp == NULL) { 692 return (ENOTCONN); 693 } 694 SCTP_INP_RLOCK(inp); 695 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 696 if (SCTP_LIST_EMPTY(&inp->sctp_asoc_list)) { 697 /* No connection */ 698 SCTP_INP_RUNLOCK(inp); 699 return (ENOTCONN); 700 } else { 701 int some_on_streamwheel = 0; 702 struct sctp_association *asoc; 703 struct sctp_tcb *stcb; 704 705 stcb = LIST_FIRST(&inp->sctp_asoc_list); 706 if (stcb == NULL) { 707 SCTP_INP_RUNLOCK(inp); 708 return (EINVAL); 709 } 710 SCTP_TCB_LOCK(stcb); 711 asoc = &stcb->asoc; 712 if (((so->so_options & SO_LINGER) && 713 (so->so_linger == 0)) || 714 (so->so_rcv.sb_cc > 0)) { 715 if (SCTP_GET_STATE(asoc) != 716 SCTP_STATE_COOKIE_WAIT) { 717 /* Left with Data unread */ 718 struct mbuf *err; 719 720 err = NULL; 721 MGET(err, M_DONTWAIT, MT_DATA); 722 if (err) { 723 /* 724 * Fill in the user 725 * initiated abort 726 */ 727 struct sctp_paramhdr *ph; 728 729 ph = mtod(err, struct sctp_paramhdr *); 730 SCTP_BUF_LEN(err) = sizeof(struct sctp_paramhdr); 731 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 732 ph->param_length = htons(SCTP_BUF_LEN(err)); 733 } 734 sctp_send_abort_tcb(stcb, err); 735 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 736 } 737 SCTP_INP_RUNLOCK(inp); 738 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 739 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 740 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 741 } 742 sctp_free_assoc(inp, stcb, SCTP_DONOT_SETSCOPE, 743 SCTP_FROM_SCTP6_USRREQ + SCTP_LOC_2); 744 /* No unlock tcb assoc is gone */ 745 return (0); 746 } 747 if (!TAILQ_EMPTY(&asoc->out_wheel)) { 748 /* Check to see if some data queued */ 749 struct sctp_stream_out *outs; 750 751 TAILQ_FOREACH(outs, &asoc->out_wheel, 752 next_spoke) { 753 if (!TAILQ_EMPTY(&outs->outqueue)) { 754 some_on_streamwheel = 1; 755 break; 756 } 757 } 758 } 759 if (TAILQ_EMPTY(&asoc->send_queue) && 760 TAILQ_EMPTY(&asoc->sent_queue) && 761 (some_on_streamwheel == 0)) { 762 /* nothing queued to send, so I'm done... */ 763 if ((SCTP_GET_STATE(asoc) != 764 SCTP_STATE_SHUTDOWN_SENT) && 765 (SCTP_GET_STATE(asoc) != 766 SCTP_STATE_SHUTDOWN_ACK_SENT)) { 767 /* only send SHUTDOWN the first time */ 768 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 769 sctp_chunk_output(stcb->sctp_ep, stcb, 1); 770 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 771 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 772 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 773 } 774 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 775 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 776 stcb->sctp_ep, stcb, 777 asoc->primary_destination); 778 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 779 stcb->sctp_ep, stcb, 780 asoc->primary_destination); 781 } 782 } else { 783 /* 784 * we still got (or just got) data to send, 785 * so set SHUTDOWN_PENDING 786 */ 787 /* 788 * XXX sockets draft says that MSG_EOF 789 * should be sent with no data. currently, 790 * we will allow user data to be sent first 791 * and move to SHUTDOWN-PENDING 792 */ 793 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 794 } 795 SCTP_TCB_UNLOCK(stcb); 796 SCTP_INP_RUNLOCK(inp); 797 return (0); 798 } 799 } else { 800 /* UDP model does not support this */ 801 SCTP_INP_RUNLOCK(inp); 802 return EOPNOTSUPP; 803 } 804 } 805 806 int 807 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 808 struct mbuf *control, struct thread *p); 809 810 811 812 static int 813 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 814 struct mbuf *control, struct thread *p) 815 { 816 struct sctp_inpcb *inp; 817 struct inpcb *in_inp; 818 struct in6pcb *inp6; 819 820 #ifdef INET 821 struct sockaddr_in6 *sin6; 822 823 #endif /* INET */ 824 /* No SPL needed since sctp_output does this */ 825 826 inp = (struct sctp_inpcb *)so->so_pcb; 827 if (inp == NULL) { 828 if (control) { 829 m_freem(control); 830 control = NULL; 831 } 832 m_freem(m); 833 return EINVAL; 834 } 835 in_inp = (struct inpcb *)inp; 836 inp6 = (struct in6pcb *)inp; 837 /* 838 * For the TCP model we may get a NULL addr, if we are a connected 839 * socket thats ok. 840 */ 841 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 842 (addr == NULL)) { 843 goto connected_type; 844 } 845 if (addr == NULL) { 846 m_freem(m); 847 if (control) { 848 m_freem(control); 849 control = NULL; 850 } 851 return (EDESTADDRREQ); 852 } 853 #ifdef INET 854 sin6 = (struct sockaddr_in6 *)addr; 855 if (SCTP_IPV6_V6ONLY(inp6)) { 856 /* 857 * if IPV6_V6ONLY flag, we discard datagrams destined to a 858 * v4 addr or v4-mapped addr 859 */ 860 if (addr->sa_family == AF_INET) { 861 return EINVAL; 862 } 863 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 864 return EINVAL; 865 } 866 } 867 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 868 if (!ip6_v6only) { 869 struct sockaddr_in sin; 870 871 /* convert v4-mapped into v4 addr and send */ 872 in6_sin6_2_sin(&sin, sin6); 873 return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 874 control, p); 875 } else { 876 /* mapped addresses aren't enabled */ 877 return EINVAL; 878 } 879 } 880 #endif /* INET */ 881 connected_type: 882 /* now what about control */ 883 if (control) { 884 if (inp->control) { 885 printf("huh? control set?\n"); 886 m_freem(inp->control); 887 inp->control = NULL; 888 } 889 inp->control = control; 890 } 891 /* Place the data */ 892 if (inp->pkt) { 893 SCTP_BUF_NEXT(inp->pkt_last) = m; 894 inp->pkt_last = m; 895 } else { 896 inp->pkt_last = inp->pkt = m; 897 } 898 if ( 899 /* FreeBSD and MacOSX uses a flag passed */ 900 ((flags & PRUS_MORETOCOME) == 0) 901 ) { 902 /* 903 * note with the current version this code will only be used 904 * by OpenBSD, NetBSD and FreeBSD have methods for 905 * re-defining sosend() to use sctp_sosend(). One can 906 * optionaly switch back to this code (by changing back the 907 * defininitions but this is not advisable. 908 */ 909 int ret; 910 911 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 912 inp->pkt = NULL; 913 inp->control = NULL; 914 return (ret); 915 } else { 916 return (0); 917 } 918 } 919 920 static int 921 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 922 { 923 uint32_t vrf_id; 924 int error = 0; 925 struct sctp_inpcb *inp; 926 struct in6pcb *inp6; 927 struct sctp_tcb *stcb; 928 929 #ifdef INET 930 struct sockaddr_in6 *sin6; 931 struct sockaddr_storage ss; 932 933 #endif /* INET */ 934 935 inp6 = (struct in6pcb *)so->so_pcb; 936 inp = (struct sctp_inpcb *)so->so_pcb; 937 if (inp == 0) { 938 return (ECONNRESET); /* I made the same as TCP since we are 939 * not setup? */ 940 } 941 vrf_id = inp->def_vrf_id; 942 SCTP_ASOC_CREATE_LOCK(inp); 943 SCTP_INP_RLOCK(inp); 944 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 945 SCTP_PCB_FLAGS_UNBOUND) { 946 /* Bind a ephemeral port */ 947 SCTP_INP_RUNLOCK(inp); 948 error = sctp6_bind(so, NULL, p); 949 if (error) { 950 SCTP_ASOC_CREATE_UNLOCK(inp); 951 952 return (error); 953 } 954 SCTP_INP_RLOCK(inp); 955 } 956 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 957 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 958 /* We are already connected AND the TCP model */ 959 SCTP_INP_RUNLOCK(inp); 960 SCTP_ASOC_CREATE_UNLOCK(inp); 961 return (EADDRINUSE); 962 } 963 #ifdef INET 964 sin6 = (struct sockaddr_in6 *)addr; 965 if (SCTP_IPV6_V6ONLY(inp6)) { 966 /* 967 * if IPV6_V6ONLY flag, ignore connections destined to a v4 968 * addr or v4-mapped addr 969 */ 970 if (addr->sa_family == AF_INET) { 971 SCTP_INP_RUNLOCK(inp); 972 SCTP_ASOC_CREATE_UNLOCK(inp); 973 return EINVAL; 974 } 975 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 976 SCTP_INP_RUNLOCK(inp); 977 SCTP_ASOC_CREATE_UNLOCK(inp); 978 return EINVAL; 979 } 980 } 981 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 982 if (!ip6_v6only) { 983 /* convert v4-mapped into v4 addr */ 984 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 985 addr = (struct sockaddr *)&ss; 986 } else { 987 /* mapped addresses aren't enabled */ 988 SCTP_INP_RUNLOCK(inp); 989 SCTP_ASOC_CREATE_UNLOCK(inp); 990 return EINVAL; 991 } 992 } else 993 #endif /* INET */ 994 addr = addr; /* for true v6 address case */ 995 996 /* Now do we connect? */ 997 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 998 stcb = LIST_FIRST(&inp->sctp_asoc_list); 999 if (stcb) 1000 SCTP_TCB_UNLOCK(stcb); 1001 SCTP_INP_RUNLOCK(inp); 1002 } else { 1003 SCTP_INP_RUNLOCK(inp); 1004 SCTP_INP_WLOCK(inp); 1005 SCTP_INP_INCR_REF(inp); 1006 SCTP_INP_WUNLOCK(inp); 1007 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 1008 if (stcb == NULL) { 1009 SCTP_INP_WLOCK(inp); 1010 SCTP_INP_DECR_REF(inp); 1011 SCTP_INP_WUNLOCK(inp); 1012 } 1013 } 1014 1015 if (stcb != NULL) { 1016 /* Already have or am bring up an association */ 1017 SCTP_ASOC_CREATE_UNLOCK(inp); 1018 SCTP_TCB_UNLOCK(stcb); 1019 return (EALREADY); 1020 } 1021 /* We are GOOD to go */ 1022 stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0, vrf_id); 1023 SCTP_ASOC_CREATE_UNLOCK(inp); 1024 if (stcb == NULL) { 1025 /* Gak! no memory */ 1026 return (error); 1027 } 1028 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1029 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1030 /* Set the connected flag so we can queue data */ 1031 soisconnecting(so); 1032 } 1033 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1034 SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1035 1036 /* initialize authentication parameters for the assoc */ 1037 sctp_initialize_auth_params(inp, stcb); 1038 1039 sctp_send_initiate(inp, stcb); 1040 SCTP_TCB_UNLOCK(stcb); 1041 return error; 1042 } 1043 1044 static int 1045 sctp6_getaddr(struct socket *so, struct sockaddr **addr) 1046 { 1047 struct sockaddr_in6 *sin6; 1048 struct sctp_inpcb *inp; 1049 uint32_t vrf_id; 1050 struct sctp_ifa *sctp_ifa; 1051 1052 int error; 1053 1054 /* 1055 * Do the malloc first in case it blocks. 1056 */ 1057 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1058 sin6->sin6_family = AF_INET6; 1059 sin6->sin6_len = sizeof(*sin6); 1060 1061 inp = (struct sctp_inpcb *)so->so_pcb; 1062 if (inp == NULL) { 1063 SCTP_FREE_SONAME(sin6); 1064 return ECONNRESET; 1065 } 1066 SCTP_INP_RLOCK(inp); 1067 sin6->sin6_port = inp->sctp_lport; 1068 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1069 /* For the bound all case you get back 0 */ 1070 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1071 struct sctp_tcb *stcb; 1072 struct sockaddr_in6 *sin_a6; 1073 struct sctp_nets *net; 1074 int fnd; 1075 1076 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1077 if (stcb == NULL) { 1078 goto notConn6; 1079 } 1080 fnd = 0; 1081 sin_a6 = NULL; 1082 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1083 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1084 if (sin_a6 == NULL) 1085 /* this will make coverity happy */ 1086 continue; 1087 1088 if (sin_a6->sin6_family == AF_INET6) { 1089 fnd = 1; 1090 break; 1091 } 1092 } 1093 if ((!fnd) || (sin_a6 == NULL)) { 1094 /* punt */ 1095 goto notConn6; 1096 } 1097 vrf_id = inp->def_vrf_id; 1098 sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *) & net->ro, net, 0, vrf_id); 1099 if (sctp_ifa) { 1100 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; 1101 } 1102 } else { 1103 /* For the bound all case you get back 0 */ 1104 notConn6: 1105 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1106 } 1107 } else { 1108 /* Take the first IPv6 address in the list */ 1109 struct sctp_laddr *laddr; 1110 int fnd = 0; 1111 1112 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1113 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 1114 struct sockaddr_in6 *sin_a; 1115 1116 sin_a = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1117 sin6->sin6_addr = sin_a->sin6_addr; 1118 fnd = 1; 1119 break; 1120 } 1121 } 1122 if (!fnd) { 1123 SCTP_FREE_SONAME(sin6); 1124 SCTP_INP_RUNLOCK(inp); 1125 return ENOENT; 1126 } 1127 } 1128 SCTP_INP_RUNLOCK(inp); 1129 /* Scoping things for v6 */ 1130 if ((error = sa6_recoverscope(sin6)) != 0) { 1131 SCTP_FREE_SONAME(sin6); 1132 return (error); 1133 } 1134 (*addr) = (struct sockaddr *)sin6; 1135 return (0); 1136 } 1137 1138 static int 1139 sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1140 { 1141 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1142 int fnd; 1143 struct sockaddr_in6 *sin_a6; 1144 struct sctp_inpcb *inp; 1145 struct sctp_tcb *stcb; 1146 struct sctp_nets *net; 1147 1148 int error; 1149 1150 /* 1151 * Do the malloc first in case it blocks. 1152 */ 1153 inp = (struct sctp_inpcb *)so->so_pcb; 1154 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1155 /* UDP type and listeners will drop out here */ 1156 return (ENOTCONN); 1157 } 1158 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1159 sin6->sin6_family = AF_INET6; 1160 sin6->sin6_len = sizeof(*sin6); 1161 1162 /* We must recapture incase we blocked */ 1163 inp = (struct sctp_inpcb *)so->so_pcb; 1164 if (inp == NULL) { 1165 SCTP_FREE_SONAME(sin6); 1166 return ECONNRESET; 1167 } 1168 SCTP_INP_RLOCK(inp); 1169 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1170 if (stcb) 1171 SCTP_TCB_LOCK(stcb); 1172 SCTP_INP_RUNLOCK(inp); 1173 if (stcb == NULL) { 1174 SCTP_FREE_SONAME(sin6); 1175 return ECONNRESET; 1176 } 1177 fnd = 0; 1178 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1179 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1180 if (sin_a6->sin6_family == AF_INET6) { 1181 fnd = 1; 1182 sin6->sin6_port = stcb->rport; 1183 sin6->sin6_addr = sin_a6->sin6_addr; 1184 break; 1185 } 1186 } 1187 SCTP_TCB_UNLOCK(stcb); 1188 if (!fnd) { 1189 /* No IPv4 address */ 1190 SCTP_FREE_SONAME(sin6); 1191 return ENOENT; 1192 } 1193 if ((error = sa6_recoverscope(sin6)) != 0) 1194 return (error); 1195 *addr = (struct sockaddr *)sin6; 1196 return (0); 1197 } 1198 1199 static int 1200 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1201 { 1202 struct sockaddr *addr; 1203 struct in6pcb *inp6 = sotoin6pcb(so); 1204 int error; 1205 1206 if (inp6 == NULL) 1207 return EINVAL; 1208 1209 /* allow v6 addresses precedence */ 1210 error = sctp6_getaddr(so, nam); 1211 if (error) { 1212 /* try v4 next if v6 failed */ 1213 error = sctp_ingetaddr(so, nam); 1214 if (error) { 1215 return (error); 1216 } 1217 addr = *nam; 1218 /* if I'm V6ONLY, convert it to v4-mapped */ 1219 if (SCTP_IPV6_V6ONLY(inp6)) { 1220 struct sockaddr_in6 sin6; 1221 1222 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1223 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1224 } 1225 } 1226 return (error); 1227 } 1228 1229 1230 static int 1231 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1232 { 1233 struct sockaddr *addr = *nam; 1234 struct in6pcb *inp6 = sotoin6pcb(so); 1235 int error; 1236 1237 if (inp6 == NULL) 1238 return EINVAL; 1239 1240 /* allow v6 addresses precedence */ 1241 error = sctp6_peeraddr(so, nam); 1242 if (error) { 1243 /* try v4 next if v6 failed */ 1244 error = sctp_peeraddr(so, nam); 1245 if (error) { 1246 return (error); 1247 } 1248 /* if I'm V6ONLY, convert it to v4-mapped */ 1249 if (SCTP_IPV6_V6ONLY(inp6)) { 1250 struct sockaddr_in6 sin6; 1251 1252 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1253 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1254 } 1255 } 1256 return error; 1257 } 1258 1259 struct pr_usrreqs sctp6_usrreqs = { 1260 .pru_abort = sctp6_abort, 1261 .pru_accept = sctp_accept, 1262 .pru_attach = sctp6_attach, 1263 .pru_bind = sctp6_bind, 1264 .pru_connect = sctp6_connect, 1265 .pru_control = in6_control, 1266 .pru_close = sctp6_close, 1267 .pru_detach = sctp6_close, 1268 .pru_sopoll = sopoll_generic, 1269 .pru_disconnect = sctp6_disconnect, 1270 .pru_listen = sctp_listen, 1271 .pru_peeraddr = sctp6_getpeeraddr, 1272 .pru_send = sctp6_send, 1273 .pru_shutdown = sctp_shutdown, 1274 .pru_sockaddr = sctp6_in6getaddr, 1275 .pru_sosend = sctp_sosend, 1276 .pru_soreceive = sctp_soreceive 1277 }; 1278