sctp6_usrreq.c revision 163953
1/*- 2 * Copyright (c) 2001-2006, 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__FBSDID("$FreeBSD: head/sys/netinet6/sctp6_usrreq.c 163953 2006-11-03 15:23:16Z rrs $"); 32#include "opt_inet.h" 33#include "opt_inet6.h" 34#include "opt_inet.h" 35#include "opt_ipsec.h" 36#include "opt_sctp.h" 37 38#include <sys/param.h> 39#include <sys/kernel.h> 40#include <sys/mbuf.h> 41#include <sys/domain.h> 42#include <sys/protosw.h> 43#include <sys/socket.h> 44#include <sys/malloc.h> 45#include <sys/socketvar.h> 46#include <sys/sysctl.h> 47#include <sys/errno.h> 48#include <sys/stat.h> 49#include <sys/systm.h> 50#include <sys/syslog.h> 51#include <sys/proc.h> 52#include <net/if.h> 53#include <net/route.h> 54#include <net/if_types.h> 55#include <netinet/in.h> 56#include <netinet/in_systm.h> 57#include <netinet/ip.h> 58#include <netinet/in_pcb.h> 59#include <netinet/in_var.h> 60#include <netinet/ip_var.h> 61#include <netinet/sctp_os.h> 62#include <netinet/sctp_pcb.h> 63#include <netinet/sctp_header.h> 64#include <netinet/sctp_var.h> 65#include <netinet/sctputil.h> 66#include <netinet/sctp_output.h> 67#include <netinet/sctp_bsd_addr.h> 68#include <netinet/sctp_input.h> 69#include <netinet/sctp_asconf.h> 70#include <netinet6/ip6_var.h> 71#include <netinet6/scope6_var.h> 72#include <netinet/sctp_bsd_addr.h> 73#include <netinet/ip6.h> 74#include <netinet6/in6_pcb.h> 75#include <netinet/icmp6.h> 76#include <netinet6/sctp6_var.h> 77#include <netinet6/ip6protosw.h> 78#include <netinet6/nd6.h> 79 80#ifdef IPSEC 81#include <netinet6/ipsec.h> 82#endif /* IPSEC */ 83 84#if defined(NFAITH) && NFAITH > 0 85#include <net/if_faith.h> 86#endif 87 88 89 90extern struct protosw inetsw[]; 91 92 93#ifndef in6pcb 94#define in6pcb inpcb 95#endif 96#ifndef sotoin6pcb 97#define sotoin6pcb sotoinpcb 98#endif 99 100 101#ifdef SCTP_DEBUG 102extern u_int32_t sctp_debug_on; 103 104#endif 105 106 107 108extern int sctp_no_csum_on_loopback; 109 110int 111sctp6_input(mp, offp, proto) 112 struct mbuf **mp; 113 int *offp; 114 115 int proto; 116 117{ 118 struct mbuf *m = *mp; 119 struct ip6_hdr *ip6; 120 struct sctphdr *sh; 121 struct sctp_inpcb *in6p = NULL; 122 struct sctp_nets *net; 123 int refcount_up = 0; 124 u_int32_t check, calc_check; 125 struct inpcb *in6p_ip; 126 struct sctp_chunkhdr *ch; 127 int length, mlen, offset, iphlen; 128 u_int8_t ecn_bits; 129 struct sctp_tcb *stcb = NULL; 130 int off = *offp; 131 int s; 132 133 ip6 = mtod(m, struct ip6_hdr *); 134#ifndef PULLDOWN_TEST 135 /* If PULLDOWN_TEST off, must be in a single mbuf. */ 136 IP6_EXTHDR_CHECK(m, off, (int)(sizeof(*sh) + sizeof(*ch)), IPPROTO_DONE); 137 sh = (struct sctphdr *)((caddr_t)ip6 + off); 138 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(*sh)); 139#else 140 /* Ensure that (sctphdr + sctp_chunkhdr) in a row. */ 141 IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, sizeof(*sh) + sizeof(*ch)); 142 if (sh == NULL) { 143 SCTP_STAT_INCR(sctps_hdrops); 144 return IPPROTO_DONE; 145 } 146 ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); 147#endif 148 149 iphlen = off; 150 offset = iphlen + sizeof(*sh) + sizeof(*ch); 151 152#if defined(NFAITH) && NFAITH > 0 153 154 if (faithprefix_p != NULL && (*faithprefix_p) (&ip6->ip6_dst)) { 155 /* XXX send icmp6 host/port unreach? */ 156 goto bad; 157 } 158#endif /* NFAITH defined and > 0 */ 159 SCTP_STAT_INCR(sctps_recvpackets); 160 SCTP_STAT_INCR_COUNTER64(sctps_inpackets); 161#ifdef SCTP_DEBUG 162 if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 163 printf("V6 input gets a packet iphlen:%d pktlen:%d\n", iphlen, m->m_pkthdr.len); 164 } 165#endif 166 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 167 /* No multi-cast support in SCTP */ 168 goto bad; 169 } 170 /* destination port of 0 is illegal, based on RFC2960. */ 171 if (sh->dest_port == 0) 172 goto bad; 173 if ((sctp_no_csum_on_loopback == 0) || 174 (m->m_pkthdr.rcvif == NULL) || 175 (m->m_pkthdr.rcvif->if_type != IFT_LOOP)) { 176 /* 177 * we do NOT validate things from the loopback if the sysctl 178 * is set to 1. 179 */ 180 check = sh->checksum; /* save incoming checksum */ 181 if ((check == 0) && (sctp_no_csum_on_loopback)) { 182 /* 183 * special hook for where we got a local address 184 * somehow routed across a non IFT_LOOP type 185 * interface 186 */ 187 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst)) 188 goto sctp_skip_csum; 189 } 190 sh->checksum = 0; /* prepare for calc */ 191 calc_check = sctp_calculate_sum(m, &mlen, iphlen); 192 if (calc_check != check) { 193#ifdef SCTP_DEBUG 194 if (sctp_debug_on & SCTP_DEBUG_INPUT1) { 195 printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%x mlen:%d iphlen:%d\n", 196 calc_check, check, (u_int)m, 197 mlen, iphlen); 198 } 199#endif 200 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 201 sh, ch, &in6p, &net); 202 /* in6p's ref-count increased && stcb locked */ 203 if ((in6p) && (stcb)) { 204 sctp_send_packet_dropped(stcb, net, m, iphlen, 1); 205 sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2); 206 } else if ((in6p != NULL) && (stcb == NULL)) { 207 refcount_up = 1; 208 } 209 SCTP_STAT_INCR(sctps_badsum); 210 SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors); 211 goto bad; 212 } 213 sh->checksum = calc_check; 214 } else { 215sctp_skip_csum: 216 mlen = m->m_pkthdr.len; 217 } 218 net = NULL; 219 /* 220 * Locate pcb and tcb for datagram sctp_findassociation_addr() wants 221 * IP/SCTP/first chunk header... 222 */ 223 stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch), 224 sh, ch, &in6p, &net); 225 /* in6p's ref-count increased */ 226 if (in6p == NULL) { 227 struct sctp_init_chunk *init_chk, chunk_buf; 228 229 SCTP_STAT_INCR(sctps_noport); 230 if (ch->chunk_type == SCTP_INITIATION) { 231 /* 232 * we do a trick here to get the INIT tag, dig in 233 * and get the tag from the INIT and put it in the 234 * common header. 235 */ 236 init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m, 237 iphlen + sizeof(*sh), sizeof(*init_chk), 238 (u_int8_t *) & chunk_buf); 239 sh->v_tag = init_chk->init.initiate_tag; 240 } 241 sctp_send_abort(m, iphlen, sh, 0, NULL); 242 goto bad; 243 } else if (stcb == NULL) { 244 refcount_up = 1; 245 } 246 in6p_ip = (struct inpcb *)in6p; 247#ifdef IPSEC 248 /* 249 * Check AH/ESP integrity. 250 */ 251 if (in6p->sctp_socket && (ipsec6_in_reject_so(m, in6p->sctp_socket)) { 252/* XXX */ 253 ipsec6stat.in_polvio++; 254 goto bad; 255 } 256#endif /* IPSEC */ 257 258 259 /* 260 * CONTROL chunk processing 261 */ 262 length = ntohs(ip6->ip6_plen) + iphlen; 263 offset -= sizeof(*ch); 264 ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); 265 s = splnet(); 266 (void)sctp_common_input_processing(&m, iphlen, offset, length, sh, ch, 267 in6p, stcb, net, ecn_bits); 268 /* inp's ref-count reduced && stcb unlocked */ 269 splx(s); 270 /* XXX this stuff below gets moved to appropriate parts later... */ 271 if (m) 272 m_freem(m); 273 if ((in6p) && refcount_up) { 274 /* reduce ref-count */ 275 SCTP_INP_WLOCK(in6p); 276 SCTP_INP_DECR_REF(in6p); 277 SCTP_INP_WUNLOCK(in6p); 278 } 279 return IPPROTO_DONE; 280 281bad: 282 if (stcb) 283 SCTP_TCB_UNLOCK(stcb); 284 285 if ((in6p) && refcount_up) { 286 /* reduce ref-count */ 287 SCTP_INP_WLOCK(in6p); 288 SCTP_INP_DECR_REF(in6p); 289 SCTP_INP_WUNLOCK(in6p); 290 } 291 if (m) 292 m_freem(m); 293 return IPPROTO_DONE; 294} 295 296 297static void 298sctp6_notify_mbuf(struct sctp_inpcb *inp, 299 struct icmp6_hdr *icmp6, 300 struct sctphdr *sh, 301 struct sctp_tcb *stcb, 302 struct sctp_nets *net) 303{ 304 u_int32_t nxtsz; 305 306 if ((inp == NULL) || (stcb == NULL) || (net == NULL) || 307 (icmp6 == NULL) || (sh == NULL)) { 308 goto out; 309 } 310 /* First do we even look at it? */ 311 if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag)) 312 goto out; 313 314 if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) { 315 /* not PACKET TO BIG */ 316 goto out; 317 } 318 /* 319 * ok we need to look closely. We could even get smarter and look at 320 * anyone that we sent to in case we get a different ICMP that tells 321 * us there is no way to reach a host, but for this impl, all we 322 * care about is MTU discovery. 323 */ 324 nxtsz = ntohl(icmp6->icmp6_mtu); 325 /* Stop any PMTU timer */ 326 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 327 328 /* Adjust destination size limit */ 329 if (net->mtu > nxtsz) { 330 net->mtu = nxtsz; 331 } 332 /* now what about the ep? */ 333 if (stcb->asoc.smallest_mtu > nxtsz) { 334 struct sctp_tmit_chunk *chk; 335 336 /* Adjust that too */ 337 stcb->asoc.smallest_mtu = nxtsz; 338 /* now off to subtract IP_DF flag if needed */ 339 340 TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) { 341 if ((u_int32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 342 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 343 } 344 } 345 TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { 346 if ((u_int32_t) (chk->send_size + IP_HDR_SIZE) > nxtsz) { 347 /* 348 * For this guy we also mark for immediate 349 * resend since we sent to big of chunk 350 */ 351 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 352 if (chk->sent != SCTP_DATAGRAM_RESEND) 353 stcb->asoc.sent_queue_retran_cnt++; 354 chk->sent = SCTP_DATAGRAM_RESEND; 355 chk->rec.data.doing_fast_retransmit = 0; 356 357 chk->sent = SCTP_DATAGRAM_RESEND; 358 /* Clear any time so NO RTT is being done */ 359 chk->sent_rcv_time.tv_sec = 0; 360 chk->sent_rcv_time.tv_usec = 0; 361 stcb->asoc.total_flight -= chk->send_size; 362 net->flight_size -= chk->send_size; 363 } 364 } 365 } 366 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL); 367out: 368 if (stcb) 369 SCTP_TCB_UNLOCK(stcb); 370} 371 372 373void 374sctp6_ctlinput(cmd, pktdst, d) 375 int cmd; 376 struct sockaddr *pktdst; 377 void *d; 378{ 379 struct sctphdr sh; 380 struct ip6ctlparam *ip6cp = NULL; 381 int s, cm; 382 383 if (pktdst->sa_family != AF_INET6 || 384 pktdst->sa_len != sizeof(struct sockaddr_in6)) 385 return; 386 387 if ((unsigned)cmd >= PRC_NCMDS) 388 return; 389 if (PRC_IS_REDIRECT(cmd)) { 390 d = NULL; 391 } else if (inet6ctlerrmap[cmd] == 0) { 392 return; 393 } 394 /* if the parameter is from icmp6, decode it. */ 395 if (d != NULL) { 396 ip6cp = (struct ip6ctlparam *)d; 397 } else { 398 ip6cp = (struct ip6ctlparam *)NULL; 399 } 400 401 if (ip6cp) { 402 /* 403 * XXX: We assume that when IPV6 is non NULL, M and OFF are 404 * valid. 405 */ 406 /* check if we can safely examine src and dst ports */ 407 struct sctp_inpcb *inp = NULL; 408 struct sctp_tcb *stcb = NULL; 409 struct sctp_nets *net = NULL; 410 struct sockaddr_in6 final; 411 412 if (ip6cp->ip6c_m == NULL || 413 (size_t)ip6cp->ip6c_m->m_pkthdr.len < (ip6cp->ip6c_off + sizeof(sh))) 414 return; 415 416 bzero(&sh, sizeof(sh)); 417 bzero(&final, sizeof(final)); 418 inp = NULL; 419 net = NULL; 420 m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh), 421 (caddr_t)&sh); 422 ip6cp->ip6c_src->sin6_port = sh.src_port; 423 final.sin6_len = sizeof(final); 424 final.sin6_family = AF_INET6; 425 final.sin6_addr = ((struct sockaddr_in6 *)pktdst)->sin6_addr; 426 final.sin6_port = sh.dest_port; 427 s = splnet(); 428 stcb = sctp_findassociation_addr_sa((struct sockaddr *)ip6cp->ip6c_src, 429 (struct sockaddr *)&final, 430 &inp, &net, 1); 431 /* inp's ref-count increased && stcb locked */ 432 if (stcb != NULL && inp && (inp->sctp_socket != NULL)) { 433 if (cmd == PRC_MSGSIZE) { 434 sctp6_notify_mbuf(inp, 435 ip6cp->ip6c_icmp6, 436 &sh, 437 stcb, 438 net); 439 /* inp's ref-count reduced && stcb unlocked */ 440 } else { 441 if (cmd == PRC_HOSTDEAD) { 442 cm = EHOSTUNREACH; 443 } else { 444 cm = inet6ctlerrmap[cmd]; 445 } 446 sctp_notify(inp, cm, &sh, 447 (struct sockaddr *)&final, 448 stcb, net); 449 /* inp's ref-count reduced && stcb unlocked */ 450 } 451 } else { 452 if (PRC_IS_REDIRECT(cmd) && inp) { 453 in6_rtchange((struct in6pcb *)inp, 454 inet6ctlerrmap[cmd]); 455 } 456 if (inp) { 457 /* reduce inp's ref-count */ 458 SCTP_INP_WLOCK(inp); 459 SCTP_INP_DECR_REF(inp); 460 SCTP_INP_WUNLOCK(inp); 461 } 462 if (stcb) 463 SCTP_TCB_UNLOCK(stcb); 464 } 465 splx(s); 466 } 467} 468 469/* 470 * this routine can probably be collasped into the one in sctp_userreq.c 471 * since they do the same thing and now we lookup with a sockaddr 472 */ 473static int 474sctp6_getcred(SYSCTL_HANDLER_ARGS) 475{ 476 struct sockaddr_in6 addrs[2]; 477 struct sctp_inpcb *inp; 478 struct sctp_nets *net; 479 struct sctp_tcb *stcb; 480 int error, s; 481 482 error = suser(req->td); 483 if (error) 484 return (error); 485 486 if (req->newlen != sizeof(addrs)) 487 return (EINVAL); 488 if (req->oldlen != sizeof(struct ucred)) 489 return (EINVAL); 490 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 491 if (error) 492 return (error); 493 s = splnet(); 494 495 stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]), 496 sin6tosa(&addrs[1]), 497 &inp, &net, 1); 498 if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { 499 error = ENOENT; 500 if (inp) { 501 SCTP_INP_WLOCK(inp); 502 SCTP_INP_DECR_REF(inp); 503 SCTP_INP_WUNLOCK(inp); 504 } 505 goto out; 506 } 507 error = SYSCTL_OUT(req, inp->sctp_socket->so_cred, 508 sizeof(struct ucred)); 509 510 SCTP_TCB_UNLOCK(stcb); 511out: 512 splx(s); 513 return (error); 514} 515 516SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW, 517 0, 0, 518 sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection"); 519 520 521/* This is the same as the sctp_abort() could be made common */ 522static void 523sctp6_abort(struct socket *so) 524{ 525 struct sctp_inpcb *inp; 526 int s; 527 uint32_t flags; 528 529 inp = (struct sctp_inpcb *)so->so_pcb; 530 if (inp == 0) 531 return; 532 s = splnet(); 533sctp_must_try_again: 534 flags = inp->sctp_flags; 535#ifdef SCTP_LOG_CLOSING 536 sctp_log_closing(inp, NULL, 17); 537#endif 538 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 539 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 540#ifdef SCTP_LOG_CLOSING 541 sctp_log_closing(inp, NULL, 16); 542#endif 543 sctp_inpcb_free(inp, 1, 0); 544 SOCK_LOCK(so); 545 so->so_snd.sb_cc = 0; 546 so->so_snd.sb_mb = NULL; 547 so->so_snd.sb_mbcnt = 0; 548 549 /* 550 * same for the rcv ones, they are only here for the 551 * accounting/select. 552 */ 553 so->so_rcv.sb_cc = 0; 554 so->so_rcv.sb_mb = NULL; 555 so->so_rcv.sb_mbcnt = 0; 556 /* 557 * Now null out the reference, we are completely detached. 558 */ 559 so->so_pcb = NULL; 560 SOCK_UNLOCK(so); 561 } else { 562 flags = inp->sctp_flags; 563 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 564 goto sctp_must_try_again; 565 } 566 } 567 splx(s); 568 return; 569} 570 571static int 572sctp6_attach(struct socket *so, int proto, struct thread *p) 573{ 574 struct in6pcb *inp6; 575 int s, error; 576 struct sctp_inpcb *inp; 577 578 inp = (struct sctp_inpcb *)so->so_pcb; 579 if (inp != NULL) 580 return EINVAL; 581 582 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 583 error = soreserve(so, sctp_sendspace, sctp_recvspace); 584 if (error) 585 return error; 586 } 587 s = splnet(); 588 error = sctp_inpcb_alloc(so); 589 splx(s); 590 if (error) 591 return error; 592 inp = (struct sctp_inpcb *)so->so_pcb; 593 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ 594 inp6 = (struct in6pcb *)inp; 595 596 inp6->inp_vflag |= INP_IPV6; 597 inp6->in6p_hops = -1; /* use kernel default */ 598 inp6->in6p_cksum = -1; /* just to be sure */ 599#ifdef INET 600 /* 601 * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 602 * socket as well, because the socket may be bound to an IPv6 603 * wildcard address, which may match an IPv4-mapped IPv6 address. 604 */ 605 inp6->inp_ip_ttl = ip_defttl; 606#endif 607 /* 608 * Hmm what about the IPSEC stuff that is missing here but in 609 * sctp_attach()? 610 */ 611 return 0; 612} 613 614static int 615sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 616{ 617 struct sctp_inpcb *inp; 618 struct in6pcb *inp6; 619 int s, error; 620 621 inp = (struct sctp_inpcb *)so->so_pcb; 622 if (inp == 0) 623 return EINVAL; 624 625 inp6 = (struct in6pcb *)inp; 626 inp6->inp_vflag &= ~INP_IPV4; 627 inp6->inp_vflag |= INP_IPV6; 628 if (addr != NULL && 629 (inp6->inp_flags & IN6P_IPV6_V6ONLY) 630 == 0) { 631 if (addr->sa_family == AF_INET) { 632 /* binding v4 addr to v6 socket, so reset flags */ 633 inp6->inp_vflag |= INP_IPV4; 634 inp6->inp_vflag &= ~INP_IPV6; 635 } else { 636 struct sockaddr_in6 *sin6_p; 637 638 sin6_p = (struct sockaddr_in6 *)addr; 639 640 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { 641 inp6->inp_vflag |= INP_IPV4; 642 } else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 643 struct sockaddr_in sin; 644 645 in6_sin6_2_sin(&sin, sin6_p); 646 inp6->inp_vflag |= INP_IPV4; 647 inp6->inp_vflag &= ~INP_IPV6; 648 s = splnet(); 649 error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, p); 650 splx(s); 651 return error; 652 } 653 } 654 } else if (addr != NULL) { 655 /* IPV6_V6ONLY socket */ 656 if (addr->sa_family == AF_INET) { 657 /* can't bind v4 addr to v6 only socket! */ 658 return EINVAL; 659 } else { 660 struct sockaddr_in6 *sin6_p; 661 662 sin6_p = (struct sockaddr_in6 *)addr; 663 664 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) 665 /* can't bind v4-mapped addrs either! */ 666 /* NOTE: we don't support SIIT */ 667 return EINVAL; 668 } 669 } 670 s = splnet(); 671 error = sctp_inpcb_bind(so, addr, p); 672 splx(s); 673 return error; 674} 675 676 677static void 678sctp6_close(struct socket *so) 679{ 680 struct sctp_inpcb *inp; 681 uint32_t flags; 682 683 inp = (struct sctp_inpcb *)so->so_pcb; 684 if (inp == 0) 685 return; 686 687 /* 688 * Inform all the lower layer assoc that we are done. 689 */ 690sctp_must_try_again: 691 flags = inp->sctp_flags; 692#ifdef SCTP_LOG_CLOSING 693 sctp_log_closing(inp, NULL, 17); 694#endif 695 if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && 696 (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) { 697 if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) || 698 (so->so_rcv.sb_cc > 0)) { 699#ifdef SCTP_LOG_CLOSING 700 sctp_log_closing(inp, NULL, 13); 701#endif 702 sctp_inpcb_free(inp, 1, 1); 703 } else { 704#ifdef SCTP_LOG_CLOSING 705 sctp_log_closing(inp, NULL, 14); 706#endif 707 sctp_inpcb_free(inp, 0, 1); 708 } 709 /* 710 * The socket is now detached, no matter what the state of 711 * the SCTP association. 712 */ 713 SOCK_LOCK(so); 714 so->so_snd.sb_cc = 0; 715 so->so_snd.sb_mb = NULL; 716 so->so_snd.sb_mbcnt = 0; 717 718 /* 719 * same for the rcv ones, they are only here for the 720 * accounting/select. 721 */ 722 so->so_rcv.sb_cc = 0; 723 so->so_rcv.sb_mb = NULL; 724 so->so_rcv.sb_mbcnt = 0; 725 /* 726 * Now null out the reference, we are completely detached. 727 */ 728 so->so_pcb = NULL; 729 SOCK_UNLOCK(so); 730 } else { 731 flags = inp->sctp_flags; 732 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) { 733 goto sctp_must_try_again; 734 } 735 } 736 return; 737 738} 739 740 741static int 742sctp6_disconnect(struct socket *so) 743{ 744 struct sctp_inpcb *inp; 745 int s; 746 747 s = splnet(); /* XXX */ 748 inp = (struct sctp_inpcb *)so->so_pcb; 749 if (inp == NULL) { 750 splx(s); 751 return (ENOTCONN); 752 } 753 SCTP_INP_RLOCK(inp); 754 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 755 if (LIST_EMPTY(&inp->sctp_asoc_list)) { 756 /* No connection */ 757 splx(s); 758 SCTP_INP_RUNLOCK(inp); 759 return (ENOTCONN); 760 } else { 761 int some_on_streamwheel = 0; 762 struct sctp_association *asoc; 763 struct sctp_tcb *stcb; 764 765 stcb = LIST_FIRST(&inp->sctp_asoc_list); 766 if (stcb == NULL) { 767 splx(s); 768 SCTP_INP_RUNLOCK(inp); 769 return (EINVAL); 770 } 771 SCTP_TCB_LOCK(stcb); 772 asoc = &stcb->asoc; 773 if (((so->so_options & SO_LINGER) && 774 (so->so_linger == 0)) || 775 (so->so_rcv.sb_cc > 0)) { 776 if (SCTP_GET_STATE(asoc) != 777 SCTP_STATE_COOKIE_WAIT) { 778 /* Left with Data unread */ 779 struct mbuf *err; 780 781 err = NULL; 782 MGET(err, M_DONTWAIT, MT_DATA); 783 if (err) { 784 /* 785 * Fill in the user 786 * initiated abort 787 */ 788 struct sctp_paramhdr *ph; 789 790 ph = mtod(err, struct sctp_paramhdr *); 791 err->m_len = sizeof(struct sctp_paramhdr); 792 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 793 ph->param_length = htons(err->m_len); 794 } 795 sctp_send_abort_tcb(stcb, err); 796 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 797 } 798 SCTP_INP_RUNLOCK(inp); 799 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) || 800 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 801 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 802 } 803 sctp_free_assoc(inp, stcb, 0); 804 /* No unlock tcb assoc is gone */ 805 splx(s); 806 return (0); 807 } 808 if (!TAILQ_EMPTY(&asoc->out_wheel)) { 809 /* Check to see if some data queued */ 810 struct sctp_stream_out *outs; 811 812 TAILQ_FOREACH(outs, &asoc->out_wheel, 813 next_spoke) { 814 if (!TAILQ_EMPTY(&outs->outqueue)) { 815 some_on_streamwheel = 1; 816 break; 817 } 818 } 819 } 820 if (TAILQ_EMPTY(&asoc->send_queue) && 821 TAILQ_EMPTY(&asoc->sent_queue) && 822 (some_on_streamwheel == 0)) { 823 /* nothing queued to send, so I'm done... */ 824 if ((SCTP_GET_STATE(asoc) != 825 SCTP_STATE_SHUTDOWN_SENT) && 826 (SCTP_GET_STATE(asoc) != 827 SCTP_STATE_SHUTDOWN_ACK_SENT)) { 828 /* only send SHUTDOWN the first time */ 829 sctp_send_shutdown(stcb, stcb->asoc.primary_destination); 830 sctp_chunk_output(stcb->sctp_ep, stcb, 1); 831 asoc->state = SCTP_STATE_SHUTDOWN_SENT; 832 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 833 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, 834 stcb->sctp_ep, stcb, 835 asoc->primary_destination); 836 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, 837 stcb->sctp_ep, stcb, 838 asoc->primary_destination); 839 } 840 } else { 841 /* 842 * we still got (or just got) data to send, 843 * so set SHUTDOWN_PENDING 844 */ 845 /* 846 * XXX sockets draft says that MSG_EOF 847 * should be sent with no data. currently, 848 * we will allow user data to be sent first 849 * and move to SHUTDOWN-PENDING 850 */ 851 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 852 } 853 SCTP_TCB_UNLOCK(stcb); 854 SCTP_INP_RUNLOCK(inp); 855 splx(s); 856 return (0); 857 } 858 } else { 859 /* UDP model does not support this */ 860 SCTP_INP_RUNLOCK(inp); 861 splx(s); 862 return EOPNOTSUPP; 863 } 864} 865 866int 867sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 868 struct mbuf *control, struct thread *p); 869 870 871 872static int 873sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 874 struct mbuf *control, struct thread *p) 875{ 876 struct sctp_inpcb *inp; 877 struct inpcb *in_inp; 878 struct in6pcb *inp6; 879 880#ifdef INET 881 struct sockaddr_in6 *sin6; 882 883#endif /* INET */ 884 /* No SPL needed since sctp_output does this */ 885 886 inp = (struct sctp_inpcb *)so->so_pcb; 887 if (inp == NULL) { 888 if (control) { 889 m_freem(control); 890 control = NULL; 891 } 892 m_freem(m); 893 return EINVAL; 894 } 895 in_inp = (struct inpcb *)inp; 896 inp6 = (struct in6pcb *)inp; 897 /* 898 * For the TCP model we may get a NULL addr, if we are a connected 899 * socket thats ok. 900 */ 901 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && 902 (addr == NULL)) { 903 goto connected_type; 904 } 905 if (addr == NULL) { 906 m_freem(m); 907 if (control) { 908 m_freem(control); 909 control = NULL; 910 } 911 return (EDESTADDRREQ); 912 } 913#ifdef INET 914 sin6 = (struct sockaddr_in6 *)addr; 915 if ( 916 917 (inp6->inp_flags & IN6P_IPV6_V6ONLY) 918 ) { 919 /* 920 * if IPV6_V6ONLY flag, we discard datagrams destined to a 921 * v4 addr or v4-mapped addr 922 */ 923 if (addr->sa_family == AF_INET) { 924 return EINVAL; 925 } 926 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 927 return EINVAL; 928 } 929 } 930 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 931 if (!ip6_v6only) { 932 struct sockaddr_in sin; 933 934 /* convert v4-mapped into v4 addr and send */ 935 in6_sin6_2_sin(&sin, sin6); 936 return sctp_sendm(so, flags, m, (struct sockaddr *)&sin, 937 control, p); 938 } else { 939 /* mapped addresses aren't enabled */ 940 return EINVAL; 941 } 942 } 943#endif /* INET */ 944connected_type: 945 /* now what about control */ 946 if (control) { 947 if (inp->control) { 948 printf("huh? control set?\n"); 949 m_freem(inp->control); 950 inp->control = NULL; 951 } 952 inp->control = control; 953 } 954 /* add it in possibly */ 955 if ((inp->pkt) && 956 (inp->pkt->m_flags & M_PKTHDR)) { 957 struct mbuf *x; 958 int c_len; 959 960 c_len = 0; 961 /* How big is it */ 962 for (x = m; x; x = x->m_next) { 963 c_len += x->m_len; 964 } 965 inp->pkt->m_pkthdr.len += c_len; 966 } 967 /* Place the data */ 968 if (inp->pkt) { 969 inp->pkt_last->m_next = m; 970 inp->pkt_last = m; 971 } else { 972 inp->pkt_last = inp->pkt = m; 973 } 974 if ( 975 /* FreeBSD and MacOSX uses a flag passed */ 976 ((flags & PRUS_MORETOCOME) == 0) 977 ) { 978 /* 979 * note with the current version this code will only be used 980 * by OpenBSD, NetBSD and FreeBSD have methods for 981 * re-defining sosend() to use sctp_sosend(). One can 982 * optionaly switch back to this code (by changing back the 983 * defininitions but this is not advisable. 984 */ 985 int ret; 986 987 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); 988 inp->pkt = NULL; 989 inp->control = NULL; 990 return (ret); 991 } else { 992 return (0); 993 } 994} 995 996static int 997sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) 998{ 999 int s = splnet(); 1000 1001 int error = 0; 1002 struct sctp_inpcb *inp; 1003 struct in6pcb *inp6; 1004 struct sctp_tcb *stcb; 1005 1006#ifdef INET 1007 struct sockaddr_in6 *sin6; 1008 struct sockaddr_storage ss; 1009 1010#endif /* INET */ 1011 1012 inp6 = (struct in6pcb *)so->so_pcb; 1013 inp = (struct sctp_inpcb *)so->so_pcb; 1014 if (inp == 0) { 1015 splx(s); 1016 return (ECONNRESET); /* I made the same as TCP since we are 1017 * not setup? */ 1018 } 1019 SCTP_ASOC_CREATE_LOCK(inp); 1020 SCTP_INP_RLOCK(inp); 1021 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 1022 SCTP_PCB_FLAGS_UNBOUND) { 1023 /* Bind a ephemeral port */ 1024 SCTP_INP_RUNLOCK(inp); 1025 error = sctp6_bind(so, NULL, p); 1026 if (error) { 1027 splx(s); 1028 SCTP_ASOC_CREATE_UNLOCK(inp); 1029 1030 return (error); 1031 } 1032 SCTP_INP_RLOCK(inp); 1033 } 1034 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 1035 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { 1036 /* We are already connected AND the TCP model */ 1037 splx(s); 1038 SCTP_INP_RUNLOCK(inp); 1039 SCTP_ASOC_CREATE_UNLOCK(inp); 1040 return (EADDRINUSE); 1041 } 1042#ifdef INET 1043 sin6 = (struct sockaddr_in6 *)addr; 1044 if ( 1045 (inp6->inp_flags & IN6P_IPV6_V6ONLY) 1046 ) { 1047 /* 1048 * if IPV6_V6ONLY flag, ignore connections destined to a v4 1049 * addr or v4-mapped addr 1050 */ 1051 if (addr->sa_family == AF_INET) { 1052 splx(s); 1053 SCTP_INP_RUNLOCK(inp); 1054 SCTP_ASOC_CREATE_UNLOCK(inp); 1055 return EINVAL; 1056 } 1057 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1058 splx(s); 1059 SCTP_INP_RUNLOCK(inp); 1060 SCTP_ASOC_CREATE_UNLOCK(inp); 1061 return EINVAL; 1062 } 1063 } 1064 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1065 if (!ip6_v6only) { 1066 /* convert v4-mapped into v4 addr */ 1067 in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6); 1068 addr = (struct sockaddr *)&ss; 1069 } else { 1070 /* mapped addresses aren't enabled */ 1071 splx(s); 1072 SCTP_INP_RUNLOCK(inp); 1073 SCTP_ASOC_CREATE_UNLOCK(inp); 1074 return EINVAL; 1075 } 1076 } else 1077#endif /* INET */ 1078 addr = addr; /* for true v6 address case */ 1079 1080 /* Now do we connect? */ 1081 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1082 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1083 if (stcb) 1084 SCTP_TCB_UNLOCK(stcb); 1085 SCTP_INP_RUNLOCK(inp); 1086 } else { 1087 SCTP_INP_RUNLOCK(inp); 1088 SCTP_INP_WLOCK(inp); 1089 SCTP_INP_INCR_REF(inp); 1090 SCTP_INP_WUNLOCK(inp); 1091 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); 1092 if (stcb == NULL) { 1093 SCTP_INP_WLOCK(inp); 1094 SCTP_INP_DECR_REF(inp); 1095 SCTP_INP_WUNLOCK(inp); 1096 } 1097 } 1098 1099 if (stcb != NULL) { 1100 /* Already have or am bring up an association */ 1101 SCTP_ASOC_CREATE_UNLOCK(inp); 1102 SCTP_TCB_UNLOCK(stcb); 1103 splx(s); 1104 return (EALREADY); 1105 } 1106 /* We are GOOD to go */ 1107 stcb = sctp_aloc_assoc(inp, addr, 1, &error, 0); 1108 SCTP_ASOC_CREATE_UNLOCK(inp); 1109 if (stcb == NULL) { 1110 /* Gak! no memory */ 1111 splx(s); 1112 return (error); 1113 } 1114 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1115 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 1116 /* Set the connected flag so we can queue data */ 1117 soisconnecting(so); 1118 } 1119 stcb->asoc.state = SCTP_STATE_COOKIE_WAIT; 1120 SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); 1121 1122 /* initialize authentication parameters for the assoc */ 1123 sctp_initialize_auth_params(inp, stcb); 1124 1125 sctp_send_initiate(inp, stcb); 1126 SCTP_TCB_UNLOCK(stcb); 1127 splx(s); 1128 return error; 1129} 1130 1131static int 1132sctp6_getaddr(struct socket *so, struct sockaddr **addr) 1133{ 1134 struct sockaddr_in6 *sin6; 1135 1136 struct sctp_inpcb *inp; 1137 1138 int error; 1139 1140 1141 /* 1142 * Do the malloc first in case it blocks. 1143 */ 1144 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1145 sin6->sin6_family = AF_INET6; 1146 sin6->sin6_len = sizeof(*sin6); 1147 1148 inp = (struct sctp_inpcb *)so->so_pcb; 1149 if (inp == NULL) { 1150 SCTP_FREE_SONAME(sin6); 1151 return ECONNRESET; 1152 } 1153 SCTP_INP_RLOCK(inp); 1154 sin6->sin6_port = inp->sctp_lport; 1155 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1156 /* For the bound all case you get back 0 */ 1157 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 1158 struct sctp_tcb *stcb; 1159 struct sockaddr_in6 *sin_a6; 1160 struct sctp_nets *net; 1161 int fnd; 1162 1163 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1164 if (stcb == NULL) { 1165 goto notConn6; 1166 } 1167 fnd = 0; 1168 sin_a6 = NULL; 1169 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1170 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1171 if (sin_a6->sin6_family == AF_INET6) { 1172 fnd = 1; 1173 break; 1174 } 1175 } 1176 if ((!fnd) || (sin_a6 == NULL)) { 1177 /* punt */ 1178 goto notConn6; 1179 } 1180 sin6->sin6_addr = sctp_ipv6_source_address_selection( 1181 inp, stcb, (struct route *)&net->ro, net, 0); 1182 1183 } else { 1184 /* For the bound all case you get back 0 */ 1185 notConn6: 1186 memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); 1187 } 1188 } else { 1189 /* Take the first IPv6 address in the list */ 1190 struct sctp_laddr *laddr; 1191 int fnd = 0; 1192 1193 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1194 if (laddr->ifa->ifa_addr->sa_family == AF_INET6) { 1195 struct sockaddr_in6 *sin_a; 1196 1197 sin_a = (struct sockaddr_in6 *)laddr->ifa->ifa_addr; 1198 sin6->sin6_addr = sin_a->sin6_addr; 1199 fnd = 1; 1200 break; 1201 } 1202 } 1203 if (!fnd) { 1204 SCTP_FREE_SONAME(sin6); 1205 SCTP_INP_RUNLOCK(inp); 1206 return ENOENT; 1207 } 1208 } 1209 SCTP_INP_RUNLOCK(inp); 1210 /* Scoping things for v6 */ 1211 if ((error = sa6_recoverscope(sin6)) != 0) 1212 return (error); 1213 (*addr) = (struct sockaddr *)sin6; 1214 return (0); 1215} 1216 1217static int 1218sctp6_peeraddr(struct socket *so, struct sockaddr **addr) 1219{ 1220 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)*addr; 1221 1222 int fnd; 1223 struct sockaddr_in6 *sin_a6; 1224 struct sctp_inpcb *inp; 1225 struct sctp_tcb *stcb; 1226 struct sctp_nets *net; 1227 1228 int error; 1229 1230 1231 /* 1232 * Do the malloc first in case it blocks. 1233 */ 1234 inp = (struct sctp_inpcb *)so->so_pcb; 1235 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) { 1236 /* UDP type and listeners will drop out here */ 1237 return (ENOTCONN); 1238 } 1239 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); 1240 sin6->sin6_family = AF_INET6; 1241 sin6->sin6_len = sizeof(*sin6); 1242 1243 /* We must recapture incase we blocked */ 1244 inp = (struct sctp_inpcb *)so->so_pcb; 1245 if (inp == NULL) { 1246 SCTP_FREE_SONAME(sin6); 1247 return ECONNRESET; 1248 } 1249 SCTP_INP_RLOCK(inp); 1250 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1251 if (stcb) 1252 SCTP_TCB_LOCK(stcb); 1253 SCTP_INP_RUNLOCK(inp); 1254 if (stcb == NULL) { 1255 SCTP_FREE_SONAME(sin6); 1256 return ECONNRESET; 1257 } 1258 fnd = 0; 1259 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1260 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1261 if (sin_a6->sin6_family == AF_INET6) { 1262 fnd = 1; 1263 sin6->sin6_port = stcb->rport; 1264 sin6->sin6_addr = sin_a6->sin6_addr; 1265 break; 1266 } 1267 } 1268 SCTP_TCB_UNLOCK(stcb); 1269 if (!fnd) { 1270 /* No IPv4 address */ 1271 SCTP_FREE_SONAME(sin6); 1272 return ENOENT; 1273 } 1274 if ((error = sa6_recoverscope(sin6)) != 0) 1275 return (error); 1276 *addr = (struct sockaddr *)sin6; 1277 return (0); 1278} 1279 1280static int 1281sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) 1282{ 1283 struct sockaddr *addr; 1284 1285 struct in6pcb *inp6 = sotoin6pcb(so); 1286 int error, s; 1287 1288 if (inp6 == NULL) 1289 return EINVAL; 1290 1291 s = splnet(); 1292 /* allow v6 addresses precedence */ 1293 error = sctp6_getaddr(so, nam); 1294 if (error) { 1295 /* try v4 next if v6 failed */ 1296 error = sctp_ingetaddr(so, nam); 1297 if (error) { 1298 splx(s); 1299 return (error); 1300 } 1301 addr = *nam; 1302 /* if I'm V6ONLY, convert it to v4-mapped */ 1303 if ( 1304 (inp6->inp_flags & IN6P_IPV6_V6ONLY) 1305 ) { 1306 struct sockaddr_in6 sin6; 1307 1308 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1309 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1310 } 1311 } 1312 splx(s); 1313 return (error); 1314} 1315 1316 1317static int 1318sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) 1319{ 1320 struct sockaddr *addr = *nam; 1321 1322 struct in6pcb *inp6 = sotoin6pcb(so); 1323 int error, s; 1324 1325 if (inp6 == NULL) 1326 return EINVAL; 1327 1328 s = splnet(); 1329 /* allow v6 addresses precedence */ 1330 error = sctp6_peeraddr(so, nam); 1331 if (error) { 1332 /* try v4 next if v6 failed */ 1333 error = sctp_peeraddr(so, nam); 1334 if (error) { 1335 splx(s); 1336 return (error); 1337 } 1338 /* if I'm V6ONLY, convert it to v4-mapped */ 1339 if ( 1340 (inp6->inp_flags & IN6P_IPV6_V6ONLY) 1341 ) { 1342 struct sockaddr_in6 sin6; 1343 1344 in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); 1345 memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); 1346 } 1347 } 1348 splx(s); 1349 return error; 1350} 1351 1352struct pr_usrreqs sctp6_usrreqs = { 1353 .pru_abort = sctp6_abort, 1354 .pru_accept = sctp_accept, 1355 .pru_attach = sctp6_attach, 1356 .pru_bind = sctp6_bind, 1357 .pru_connect = sctp6_connect, 1358 .pru_control = in6_control, 1359 .pru_close = sctp6_close, 1360 .pru_detach = sctp6_close, 1361 .pru_sopoll = sopoll_generic, 1362 .pru_disconnect = sctp6_disconnect, 1363 .pru_listen = sctp_listen, 1364 .pru_peeraddr = sctp6_getpeeraddr, 1365 .pru_send = sctp6_send, 1366 .pru_shutdown = sctp_shutdown, 1367 .pru_sockaddr = sctp6_in6getaddr, 1368 .pru_sosend = sctp_sosend, 1369 .pru_soreceive = sctp_soreceive 1370}; 1371