sys/netinet6/sctp6_usrreq.c

   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 extern struct protosw inetsw[];
  61
  62 int
  63 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
  64 {
  65         struct mbuf *m;
  66         int iphlen;
  67         uint32_t vrf_id;
  68         uint8_t ecn_bits;
  69         struct sockaddr_in6 src, dst;
  70         struct ip6_hdr *ip6;
  71         struct sctphdr *sh;
  72         struct sctp_chunkhdr *ch;
  73         int length, offset;
  74         uint8_t compute_crc;
  75         uint32_t mflowid;
  76         uint8_t mflowtype;
  77         uint16_t fibnum;
  78
  79         iphlen = *offp;
  80         if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
  81                 SCTP_RELEASE_PKT(*i_pak);
  82                 return (IPPROTO_DONE);
  83         }
  84         m = SCTP_HEADER_TO_CHAIN(*i_pak);
  85 #ifdef SCTP_MBUF_LOGGING
  86         /* Log in any input mbufs */
  87         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
  88                 sctp_log_mbc(m, SCTP_MBUF_INPUT);
  89         }
  90 #endif
  91 #ifdef SCTP_PACKET_LOGGING
  92         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
  93                 sctp_packet_log(m);
  94         }
  95 #endif
  96         SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
  97             "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
  98             m->m_pkthdr.len,
  99             if_name(m->m_pkthdr.rcvif),
 100             (int)m->m_pkthdr.csum_flags, CSUM_BITS);
 101         mflowid = m->m_pkthdr.flowid;
 102         mflowtype = M_HASHTYPE_GET(m);
 103         fibnum = M_GETFIB(m);
 104         SCTP_STAT_INCR(sctps_recvpackets);
 105         SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
 106         /* Get IP, SCTP, and first chunk header together in the first mbuf. */
 107         offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 108         ip6 = mtod(m, struct ip6_hdr *);
 109         IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
 110             (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
 111         if (sh == NULL) {
 112                 SCTP_STAT_INCR(sctps_hdrops);
 113                 return (IPPROTO_DONE);
 114         }
 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 = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
 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
 168 int
 169 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
 170 {
 171         return (sctp6_input_with_port(i_pak, offp, 0));
 172 }
 173
 174 void
 175 sctp6_notify(struct sctp_inpcb *inp,
 176     struct sctp_tcb *stcb,
 177     struct sctp_nets *net,
 178     uint8_t icmp6_type,
 179     uint8_t icmp6_code,
 180     uint32_t next_mtu)
 181 {
 182 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 183         struct socket *so;
 184 #endif
 185         int timer_stopped;
 186
 187         switch (icmp6_type) {
 188         case ICMP6_DST_UNREACH:
 189                 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
 190                     (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
 191                     (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
 192                     (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
 193                         /* Mark the net unreachable. */
 194                         if (net->dest_state & SCTP_ADDR_REACHABLE) {
 195                                 /* Ok that destination is not reachable */
 196                                 net->dest_state &= ~SCTP_ADDR_REACHABLE;
 197                                 net->dest_state &= ~SCTP_ADDR_PF;
 198                                 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
 199                                     stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
 200                         }
 201                 }
 202                 SCTP_TCB_UNLOCK(stcb);
 203                 break;
 204         case ICMP6_PARAM_PROB:
 205                 /* Treat it like an ABORT. */
 206                 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
 207                         sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
 208 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 209                         so = SCTP_INP_SO(inp);
 210                         atomic_add_int(&stcb->asoc.refcnt, 1);
 211                         SCTP_TCB_UNLOCK(stcb);
 212                         SCTP_SOCKET_LOCK(so, 1);
 213                         SCTP_TCB_LOCK(stcb);
 214                         atomic_subtract_int(&stcb->asoc.refcnt, 1);
 215 #endif
 216                         (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
 217                             SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
 218 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 219                         SCTP_SOCKET_UNLOCK(so, 1);
 220 #endif
 221                 } else {
 222                         SCTP_TCB_UNLOCK(stcb);
 223                 }
 224                 break;
 225         case ICMP6_PACKET_TOO_BIG:
 226                 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
 227                         SCTP_TCB_UNLOCK(stcb);
 228                         break;
 229                 }
 230                 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
 231                         timer_stopped = 1;
 232                         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
 233                             SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
 234                 } else {
 235                         timer_stopped = 0;
 236                 }
 237                 /* Update the path MTU. */
 238                 if (net->port) {
 239                         next_mtu -= sizeof(struct udphdr);
 240                 }
 241                 if (net->mtu > next_mtu) {
 242                         net->mtu = next_mtu;
 243                 }
 244                 /* Update the association MTU */
 245                 if (stcb->asoc.smallest_mtu > next_mtu) {
 246                         sctp_pathmtu_adjustment(stcb, next_mtu);
 247                 }
 248                 /* Finally, start the PMTU timer if it was running before. */
 249                 if (timer_stopped) {
 250                         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
 251                 }
 252                 SCTP_TCB_UNLOCK(stcb);
 253                 break;
 254         default:
 255                 SCTP_TCB_UNLOCK(stcb);
 256                 break;
 257         }
 258 }
 259
 260 void
 261 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
 262 {
 263         struct ip6ctlparam *ip6cp;
 264         struct sctp_inpcb *inp;
 265         struct sctp_tcb *stcb;
 266         struct sctp_nets *net;
 267         struct sctphdr sh;
 268         struct sockaddr_in6 src, dst;
 269
 270         if (pktdst->sa_family != AF_INET6 ||
 271             pktdst->sa_len != sizeof(struct sockaddr_in6)) {
 272                 return;
 273         }
 274         if ((unsigned)cmd >= PRC_NCMDS) {
 275                 return;
 276         }
 277         if (PRC_IS_REDIRECT(cmd)) {
 278                 d = NULL;
 279         } else if (inet6ctlerrmap[cmd] == 0) {
 280                 return;
 281         }
 282         /* If the parameter is from icmp6, decode it. */
 283         if (d != NULL) {
 284                 ip6cp = (struct ip6ctlparam *)d;
 285         } else {
 286                 ip6cp = (struct ip6ctlparam *)NULL;
 287         }
 288
 289         if (ip6cp != NULL) {
 290                 /*
 291                  * XXX: We assume that when IPV6 is non NULL, M and OFF are
 292                  * valid.
 293                  */
 294                 if (ip6cp->ip6c_m == NULL) {
 295                         return;
 296                 }
 297                 /*
 298                  * Check if we can safely examine the ports and the
 299                  * verification tag of the SCTP common header.
 300                  */
 301                 if (ip6cp->ip6c_m->m_pkthdr.len <
 302                     (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
 303                         return;
 304                 }
 305                 /* Copy out the port numbers and the verification tag. */
 306                 memset(&sh, 0, sizeof(sh));
 307                 m_copydata(ip6cp->ip6c_m,
 308                     ip6cp->ip6c_off,
 309                     sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
 310                     (caddr_t)&sh);
 311                 memset(&src, 0, sizeof(struct sockaddr_in6));
 312                 src.sin6_family = AF_INET6;
 313                 src.sin6_len = sizeof(struct sockaddr_in6);
 314                 src.sin6_port = sh.src_port;
 315                 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
 316                 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
 317                         return;
 318                 }
 319                 memset(&dst, 0, sizeof(struct sockaddr_in6));
 320                 dst.sin6_family = AF_INET6;
 321                 dst.sin6_len = sizeof(struct sockaddr_in6);
 322                 dst.sin6_port = sh.dest_port;
 323                 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
 324                 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
 325                         return;
 326                 }
 327                 inp = NULL;
 328                 net = NULL;
 329                 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
 330                     (struct sockaddr *)&src,
 331                     &inp, &net, 1, SCTP_DEFAULT_VRFID);
 332                 if ((stcb != NULL) &&
 333                     (net != NULL) &&
 334                     (inp != NULL)) {
 335                         /* Check the verification tag */
 336                         if (ntohl(sh.v_tag) != 0) {
 337                                 /*
 338                                  * This must be the verification tag used
 339                                  * for sending out packets. We don't
 340                                  * consider packets reflecting the
 341                                  * verification tag.
 342                                  */
 343                                 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
 344                                         SCTP_TCB_UNLOCK(stcb);
 345                                         return;
 346                                 }
 347                         } else {
 348                                 if (ip6cp->ip6c_m->m_pkthdr.len >=
 349                                     ip6cp->ip6c_off + sizeof(struct sctphdr) +
 350                                     sizeof(struct sctp_chunkhdr) +
 351                                     offsetof(struct sctp_init, a_rwnd)) {
 352                                         /*
 353                                          * In this case we can check if we
 354                                          * got an INIT chunk and if the
 355                                          * initiate tag matches.
 356                                          */
 357                                         uint32_t initiate_tag;
 358                                         uint8_t chunk_type;
 359
 360                                         m_copydata(ip6cp->ip6c_m,
 361                                             ip6cp->ip6c_off +
 362                                             sizeof(struct sctphdr),
 363                                             sizeof(uint8_t),
 364                                             (caddr_t)&chunk_type);
 365                                         m_copydata(ip6cp->ip6c_m,
 366                                             ip6cp->ip6c_off +
 367                                             sizeof(struct sctphdr) +
 368                                             sizeof(struct sctp_chunkhdr),
 369                                             sizeof(uint32_t),
 370                                             (caddr_t)&initiate_tag);
 371                                         if ((chunk_type != SCTP_INITIATION) ||
 372                                             (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
 373                                                 SCTP_TCB_UNLOCK(stcb);
 374                                                 return;
 375                                         }
 376                                 } else {
 377                                         SCTP_TCB_UNLOCK(stcb);
 378                                         return;
 379                                 }
 380                         }
 381                         sctp6_notify(inp, stcb, net,
 382                             ip6cp->ip6c_icmp6->icmp6_type,
 383                             ip6cp->ip6c_icmp6->icmp6_code,
 384                             ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
 385                 } else {
 386                         if ((stcb == NULL) && (inp != NULL)) {
 387                                 /* reduce inp's ref-count */
 388                                 SCTP_INP_WLOCK(inp);
 389                                 SCTP_INP_DECR_REF(inp);
 390                                 SCTP_INP_WUNLOCK(inp);
 391                         }
 392                         if (stcb) {
 393                                 SCTP_TCB_UNLOCK(stcb);
 394                         }
 395                 }
 396         }
 397 }
 398
 399 /*
 400  * this routine can probably be collasped into the one in sctp_userreq.c
 401  * since they do the same thing and now we lookup with a sockaddr
 402  */
 403 static int
 404 sctp6_getcred(SYSCTL_HANDLER_ARGS)
 405 {
 406         struct xucred xuc;
 407         struct sockaddr_in6 addrs[2];
 408         struct sctp_inpcb *inp;
 409         struct sctp_nets *net;
 410         struct sctp_tcb *stcb;
 411         int error;
 412         uint32_t vrf_id;
 413
 414         vrf_id = SCTP_DEFAULT_VRFID;
 415
 416         error = priv_check(req->td, PRIV_NETINET_GETCRED);
 417         if (error)
 418                 return (error);
 419
 420         if (req->newlen != sizeof(addrs)) {
 421                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 422                 return (EINVAL);
 423         }
 424         if (req->oldlen != sizeof(struct ucred)) {
 425                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 426                 return (EINVAL);
 427         }
 428         error = SYSCTL_IN(req, addrs, sizeof(addrs));
 429         if (error)
 430                 return (error);
 431
 432         stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
 433             sin6tosa(&addrs[0]),
 434             &inp, &net, 1, vrf_id);
 435         if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
 436                 if ((inp != NULL) && (stcb == NULL)) {
 437                         /* reduce ref-count */
 438                         SCTP_INP_WLOCK(inp);
 439                         SCTP_INP_DECR_REF(inp);
 440                         goto cred_can_cont;
 441                 }
 442                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
 443                 error = ENOENT;
 444                 goto out;
 445         }
 446         SCTP_TCB_UNLOCK(stcb);
 447         /*
 448          * We use the write lock here, only since in the error leg we need
 449          * it. If we used RLOCK, then we would have to
 450          * wlock/decr/unlock/rlock. Which in theory could create a hole.
 451          * Better to use higher wlock.
 452          */
 453         SCTP_INP_WLOCK(inp);
 454 cred_can_cont:
 455         error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
 456         if (error) {
 457                 SCTP_INP_WUNLOCK(inp);
 458                 goto out;
 459         }
 460         cru2x(inp->sctp_socket->so_cred, &xuc);
 461         SCTP_INP_WUNLOCK(inp);
 462         error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
 463 out:
 464         return (error);
 465 }
 466
 467 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
 468     0, 0,
 469     sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
 470
 471
 472 /* This is the same as the sctp_abort() could be made common */
 473 static void
 474 sctp6_abort(struct socket *so)
 475 {
 476         struct sctp_inpcb *inp;
 477         uint32_t flags;
 478
 479         inp = (struct sctp_inpcb *)so->so_pcb;
 480         if (inp == NULL) {
 481                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 482                 return;
 483         }
 484 sctp_must_try_again:
 485         flags = inp->sctp_flags;
 486 #ifdef SCTP_LOG_CLOSING
 487         sctp_log_closing(inp, NULL, 17);
 488 #endif
 489         if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
 490             (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
 491 #ifdef SCTP_LOG_CLOSING
 492                 sctp_log_closing(inp, NULL, 16);
 493 #endif
 494                 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
 495                     SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
 496                 SOCK_LOCK(so);
 497                 SCTP_SB_CLEAR(so->so_snd);
 498                 /*
 499                  * same for the rcv ones, they are only here for the
 500                  * accounting/select.
 501                  */
 502                 SCTP_SB_CLEAR(so->so_rcv);
 503                 /* Now null out the reference, we are completely detached. */
 504                 so->so_pcb = NULL;
 505                 SOCK_UNLOCK(so);
 506         } else {
 507                 flags = inp->sctp_flags;
 508                 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
 509                         goto sctp_must_try_again;
 510                 }
 511         }
 512         return;
 513 }
 514
 515 static int
 516 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
 517 {
 518         struct in6pcb *inp6;
 519         int error;
 520         struct sctp_inpcb *inp;
 521         uint32_t vrf_id = SCTP_DEFAULT_VRFID;
 522
 523         inp = (struct sctp_inpcb *)so->so_pcb;
 524         if (inp != NULL) {
 525                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 526                 return (EINVAL);
 527         }
 528         if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
 529                 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
 530                 if (error)
 531                         return (error);
 532         }
 533         error = sctp_inpcb_alloc(so, vrf_id);
 534         if (error)
 535                 return (error);
 536         inp = (struct sctp_inpcb *)so->so_pcb;
 537         SCTP_INP_WLOCK(inp);
 538         inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6;     /* I'm v6! */
 539         inp6 = (struct in6pcb *)inp;
 540
 541         inp6->inp_vflag |= INP_IPV6;
 542         inp6->in6p_hops = -1;   /* use kernel default */
 543         inp6->in6p_cksum = -1;  /* just to be sure */
 544 #ifdef INET
 545         /*
 546          * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
 547          * socket as well, because the socket may be bound to an IPv6
 548          * wildcard address, which may match an IPv4-mapped IPv6 address.
 549          */
 550         inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
 551 #endif
 552         SCTP_INP_WUNLOCK(inp);
 553         return (0);
 554 }
 555
 556 static int
 557 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
 558 {
 559         struct sctp_inpcb *inp;
 560         struct in6pcb *inp6;
 561         int error;
 562
 563         inp = (struct sctp_inpcb *)so->so_pcb;
 564         if (inp == NULL) {
 565                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 566                 return (EINVAL);
 567         }
 568         if (addr) {
 569                 switch (addr->sa_family) {
 570 #ifdef INET
 571                 case AF_INET:
 572                         if (addr->sa_len != sizeof(struct sockaddr_in)) {
 573                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 574                                 return (EINVAL);
 575                         }
 576                         break;
 577 #endif
 578 #ifdef INET6
 579                 case AF_INET6:
 580                         if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 581                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 582                                 return (EINVAL);
 583                         }
 584                         break;
 585 #endif
 586                 default:
 587                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 588                         return (EINVAL);
 589                 }
 590         }
 591         inp6 = (struct in6pcb *)inp;
 592         inp6->inp_vflag &= ~INP_IPV4;
 593         inp6->inp_vflag |= INP_IPV6;
 594         if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp6) == 0)) {
 595                 switch (addr->sa_family) {
 596 #ifdef INET
 597                 case AF_INET:
 598                         /* binding v4 addr to v6 socket, so reset flags */
 599                         inp6->inp_vflag |= INP_IPV4;
 600                         inp6->inp_vflag &= ~INP_IPV6;
 601                         break;
 602 #endif
 603 #ifdef INET6
 604                 case AF_INET6:
 605                         {
 606                                 struct sockaddr_in6 *sin6_p;
 607
 608                                 sin6_p = (struct sockaddr_in6 *)addr;
 609
 610                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
 611                                         inp6->inp_vflag |= INP_IPV4;
 612                                 }
 613 #ifdef INET
 614                                 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
 615                                         struct sockaddr_in sin;
 616
 617                                         in6_sin6_2_sin(&sin, sin6_p);
 618                                         inp6->inp_vflag |= INP_IPV4;
 619                                         inp6->inp_vflag &= ~INP_IPV6;
 620                                         error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
 621                                         return (error);
 622                                 }
 623 #endif
 624                                 break;
 625                         }
 626 #endif
 627                 default:
 628                         break;
 629                 }
 630         } else if (addr != NULL) {
 631                 struct sockaddr_in6 *sin6_p;
 632
 633                 /* IPV6_V6ONLY socket */
 634 #ifdef INET
 635                 if (addr->sa_family == AF_INET) {
 636                         /* can't bind v4 addr to v6 only socket! */
 637                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 638                         return (EINVAL);
 639                 }
 640 #endif
 641                 sin6_p = (struct sockaddr_in6 *)addr;
 642
 643                 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
 644                         /* can't bind v4-mapped addrs either! */
 645                         /* NOTE: we don't support SIIT */
 646                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 647                         return (EINVAL);
 648                 }
 649         }
 650         error = sctp_inpcb_bind(so, addr, NULL, p);
 651         return (error);
 652 }
 653
 654
 655 static void
 656 sctp6_close(struct socket *so)
 657 {
 658         sctp_close(so);
 659 }
 660
 661 /* This could be made common with sctp_detach() since they are identical */
 662
 663 static
 664 int
 665 sctp6_disconnect(struct socket *so)
 666 {
 667         return (sctp_disconnect(so));
 668 }
 669
 670
 671 int
 672 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
 673     struct mbuf *control, struct thread *p);
 674
 675
 676 static int
 677 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
 678     struct mbuf *control, struct thread *p)
 679 {
 680         struct sctp_inpcb *inp;
 681         struct in6pcb *inp6;
 682
 683 #ifdef INET
 684         struct sockaddr_in6 *sin6;
 685 #endif                          /* INET */
 686         /* No SPL needed since sctp_output does this */
 687
 688         inp = (struct sctp_inpcb *)so->so_pcb;
 689         if (inp == NULL) {
 690                 if (control) {
 691                         SCTP_RELEASE_PKT(control);
 692                         control = NULL;
 693                 }
 694                 SCTP_RELEASE_PKT(m);
 695                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 696                 return (EINVAL);
 697         }
 698         inp6 = (struct in6pcb *)inp;
 699         /*
 700          * For the TCP model we may get a NULL addr, if we are a connected
 701          * socket thats ok.
 702          */
 703         if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
 704             (addr == NULL)) {
 705                 goto connected_type;
 706         }
 707         if (addr == NULL) {
 708                 SCTP_RELEASE_PKT(m);
 709                 if (control) {
 710                         SCTP_RELEASE_PKT(control);
 711                         control = NULL;
 712                 }
 713                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
 714                 return (EDESTADDRREQ);
 715         }
 716 #ifdef INET
 717         sin6 = (struct sockaddr_in6 *)addr;
 718         if (SCTP_IPV6_V6ONLY(inp6)) {
 719                 /*
 720                  * if IPV6_V6ONLY flag, we discard datagrams destined to a
 721                  * v4 addr or v4-mapped addr
 722                  */
 723                 if (addr->sa_family == AF_INET) {
 724                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 725                         return (EINVAL);
 726                 }
 727                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 728                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 729                         return (EINVAL);
 730                 }
 731         }
 732         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 733                 struct sockaddr_in sin;
 734
 735                 /* convert v4-mapped into v4 addr and send */
 736                 in6_sin6_2_sin(&sin, sin6);
 737                 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
 738         }
 739 #endif                          /* INET */
 740 connected_type:
 741         /* now what about control */
 742         if (control) {
 743                 if (inp->control) {
 744                         SCTP_PRINTF("huh? control set?\n");
 745                         SCTP_RELEASE_PKT(inp->control);
 746                         inp->control = NULL;
 747                 }
 748                 inp->control = control;
 749         }
 750         /* Place the data */
 751         if (inp->pkt) {
 752                 SCTP_BUF_NEXT(inp->pkt_last) = m;
 753                 inp->pkt_last = m;
 754         } else {
 755                 inp->pkt_last = inp->pkt = m;
 756         }
 757         if (
 758         /* FreeBSD and MacOSX uses a flag passed */
 759             ((flags & PRUS_MORETOCOME) == 0)
 760             ) {
 761                 /*
 762                  * note with the current version this code will only be used
 763                  * by OpenBSD, NetBSD and FreeBSD have methods for
 764                  * re-defining sosend() to use sctp_sosend().  One can
 765                  * optionaly switch back to this code (by changing back the
 766                  * defininitions but this is not advisable.
 767                  */
 768                 int ret;
 769
 770                 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
 771                 inp->pkt = NULL;
 772                 inp->control = NULL;
 773                 return (ret);
 774         } else {
 775                 return (0);
 776         }
 777 }
 778
 779 static int
 780 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
 781 {
 782         uint32_t vrf_id;
 783         int error = 0;
 784         struct sctp_inpcb *inp;
 785         struct sctp_tcb *stcb;
 786 #ifdef INET
 787         struct in6pcb *inp6;
 788         struct sockaddr_in6 *sin6;
 789         union sctp_sockstore store;
 790 #endif
 791
 792 #ifdef INET
 793         inp6 = (struct in6pcb *)so->so_pcb;
 794 #endif
 795         inp = (struct sctp_inpcb *)so->so_pcb;
 796         if (inp == NULL) {
 797                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
 798                 return (ECONNRESET);    /* I made the same as TCP since we are
 799                                          * not setup? */
 800         }
 801         if (addr == NULL) {
 802                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 803                 return (EINVAL);
 804         }
 805         switch (addr->sa_family) {
 806 #ifdef INET
 807         case AF_INET:
 808                 if (addr->sa_len != sizeof(struct sockaddr_in)) {
 809                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 810                         return (EINVAL);
 811                 }
 812                 break;
 813 #endif
 814 #ifdef INET6
 815         case AF_INET6:
 816                 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 817                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 818                         return (EINVAL);
 819                 }
 820                 break;
 821 #endif
 822         default:
 823                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 824                 return (EINVAL);
 825         }
 826
 827         vrf_id = inp->def_vrf_id;
 828         SCTP_ASOC_CREATE_LOCK(inp);
 829         SCTP_INP_RLOCK(inp);
 830         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
 831             SCTP_PCB_FLAGS_UNBOUND) {
 832                 /* Bind a ephemeral port */
 833                 SCTP_INP_RUNLOCK(inp);
 834                 error = sctp6_bind(so, NULL, p);
 835                 if (error) {
 836                         SCTP_ASOC_CREATE_UNLOCK(inp);
 837
 838                         return (error);
 839                 }
 840                 SCTP_INP_RLOCK(inp);
 841         }
 842         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
 843             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
 844                 /* We are already connected AND the TCP model */
 845                 SCTP_INP_RUNLOCK(inp);
 846                 SCTP_ASOC_CREATE_UNLOCK(inp);
 847                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
 848                 return (EADDRINUSE);
 849         }
 850 #ifdef INET
 851         sin6 = (struct sockaddr_in6 *)addr;
 852         if (SCTP_IPV6_V6ONLY(inp6)) {
 853                 /*
 854                  * if IPV6_V6ONLY flag, ignore connections destined to a v4
 855                  * addr or v4-mapped addr
 856                  */
 857                 if (addr->sa_family == AF_INET) {
 858                         SCTP_INP_RUNLOCK(inp);
 859                         SCTP_ASOC_CREATE_UNLOCK(inp);
 860                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 861                         return (EINVAL);
 862                 }
 863                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 864                         SCTP_INP_RUNLOCK(inp);
 865                         SCTP_ASOC_CREATE_UNLOCK(inp);
 866                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 867                         return (EINVAL);
 868                 }
 869         }
 870         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 871                 /* convert v4-mapped into v4 addr */
 872                 in6_sin6_2_sin(&store.sin, sin6);
 873                 addr = &store.sa;
 874         }
 875 #endif                          /* INET */
 876         /* Now do we connect? */
 877         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 878                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 879                 if (stcb) {
 880                         SCTP_TCB_LOCK(stcb);
 881                 }
 882                 SCTP_INP_RUNLOCK(inp);
 883         } else {
 884                 SCTP_INP_RUNLOCK(inp);
 885                 SCTP_INP_WLOCK(inp);
 886                 SCTP_INP_INCR_REF(inp);
 887                 SCTP_INP_WUNLOCK(inp);
 888                 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
 889                 if (stcb == NULL) {
 890                         SCTP_INP_WLOCK(inp);
 891                         SCTP_INP_DECR_REF(inp);
 892                         SCTP_INP_WUNLOCK(inp);
 893                 }
 894         }
 895
 896         if (stcb != NULL) {
 897                 /* Already have or am bring up an association */
 898                 SCTP_ASOC_CREATE_UNLOCK(inp);
 899                 SCTP_TCB_UNLOCK(stcb);
 900                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
 901                 return (EALREADY);
 902         }
 903         /* We are GOOD to go */
 904         stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
 905             inp->sctp_ep.pre_open_stream_count,
 906             inp->sctp_ep.port, p);
 907         SCTP_ASOC_CREATE_UNLOCK(inp);
 908         if (stcb == NULL) {
 909                 /* Gak! no memory */
 910                 return (error);
 911         }
 912         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 913                 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
 914                 /* Set the connected flag so we can queue data */
 915                 soisconnecting(so);
 916         }
 917         stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
 918         (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
 919
 920         /* initialize authentication parameters for the assoc */
 921         sctp_initialize_auth_params(inp, stcb);
 922
 923         sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
 924         SCTP_TCB_UNLOCK(stcb);
 925         return (error);
 926 }
 927
 928 static int
 929 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
 930 {
 931         struct sockaddr_in6 *sin6;
 932         struct sctp_inpcb *inp;
 933         uint32_t vrf_id;
 934         struct sctp_ifa *sctp_ifa;
 935
 936         int error;
 937
 938         /*
 939          * Do the malloc first in case it blocks.
 940          */
 941         SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
 942         if (sin6 == NULL)
 943                 return (ENOMEM);
 944         sin6->sin6_family = AF_INET6;
 945         sin6->sin6_len = sizeof(*sin6);
 946
 947         inp = (struct sctp_inpcb *)so->so_pcb;
 948         if (inp == NULL) {
 949                 SCTP_FREE_SONAME(sin6);
 950                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
 951                 return (ECONNRESET);
 952         }
 953         SCTP_INP_RLOCK(inp);
 954         sin6->sin6_port = inp->sctp_lport;
 955         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 956                 /* For the bound all case you get back 0 */
 957                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 958                         struct sctp_tcb *stcb;
 959                         struct sockaddr_in6 *sin_a6;
 960                         struct sctp_nets *net;
 961                         int fnd;
 962
 963                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 964                         if (stcb == NULL) {
 965                                 SCTP_INP_RUNLOCK(inp);
 966                                 SCTP_FREE_SONAME(sin6);
 967                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
 968                                 return (ENOENT);
 969                         }
 970                         fnd = 0;
 971                         sin_a6 = NULL;
 972                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 973                                 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 974                                 if (sin_a6 == NULL)
 975                                         /* this will make coverity happy */
 976                                         continue;
 977
 978                                 if (sin_a6->sin6_family == AF_INET6) {
 979                                         fnd = 1;
 980                                         break;
 981                                 }
 982                         }
 983                         if ((!fnd) || (sin_a6 == NULL)) {
 984                                 /* punt */
 985                                 SCTP_INP_RUNLOCK(inp);
 986                                 SCTP_FREE_SONAME(sin6);
 987                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
 988                                 return (ENOENT);
 989                         }
 990                         vrf_id = inp->def_vrf_id;
 991                         sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
 992                         if (sctp_ifa) {
 993                                 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
 994                         }
 995                 } else {
 996                         /* For the bound all case you get back 0 */
 997                         memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
 998                 }
 999         } else {
1000                 /* Take the first IPv6 address in the list */
1001                 struct sctp_laddr *laddr;
1002                 int fnd = 0;
1003
1004                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1005                         if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1006                                 struct sockaddr_in6 *sin_a;
1007
1008                                 sin_a = &laddr->ifa->address.sin6;
1009                                 sin6->sin6_addr = sin_a->sin6_addr;
1010                                 fnd = 1;
1011                                 break;
1012                         }
1013                 }
1014                 if (!fnd) {
1015                         SCTP_FREE_SONAME(sin6);
1016                         SCTP_INP_RUNLOCK(inp);
1017                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1018                         return (ENOENT);
1019                 }
1020         }
1021         SCTP_INP_RUNLOCK(inp);
1022         /* Scoping things for v6 */
1023         if ((error = sa6_recoverscope(sin6)) != 0) {
1024                 SCTP_FREE_SONAME(sin6);
1025                 return (error);
1026         }
1027         (*addr) = (struct sockaddr *)sin6;
1028         return (0);
1029 }
1030
1031 static int
1032 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1033 {
1034         struct sockaddr_in6 *sin6;
1035         int fnd;
1036         struct sockaddr_in6 *sin_a6;
1037         struct sctp_inpcb *inp;
1038         struct sctp_tcb *stcb;
1039         struct sctp_nets *net;
1040         int error;
1041
1042         /* Do the malloc first in case it blocks. */
1043         SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1044         if (sin6 == NULL)
1045                 return (ENOMEM);
1046         sin6->sin6_family = AF_INET6;
1047         sin6->sin6_len = sizeof(*sin6);
1048
1049         inp = (struct sctp_inpcb *)so->so_pcb;
1050         if ((inp == NULL) ||
1051             ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1052                 /* UDP type and listeners will drop out here */
1053                 SCTP_FREE_SONAME(sin6);
1054                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1055                 return (ENOTCONN);
1056         }
1057         SCTP_INP_RLOCK(inp);
1058         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1059         if (stcb) {
1060                 SCTP_TCB_LOCK(stcb);
1061         }
1062         SCTP_INP_RUNLOCK(inp);
1063         if (stcb == NULL) {
1064                 SCTP_FREE_SONAME(sin6);
1065                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1066                 return (ECONNRESET);
1067         }
1068         fnd = 0;
1069         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1070                 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1071                 if (sin_a6->sin6_family == AF_INET6) {
1072                         fnd = 1;
1073                         sin6->sin6_port = stcb->rport;
1074                         sin6->sin6_addr = sin_a6->sin6_addr;
1075                         break;
1076                 }
1077         }
1078         SCTP_TCB_UNLOCK(stcb);
1079         if (!fnd) {
1080                 /* No IPv4 address */
1081                 SCTP_FREE_SONAME(sin6);
1082                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1083                 return (ENOENT);
1084         }
1085         if ((error = sa6_recoverscope(sin6)) != 0) {
1086                 SCTP_FREE_SONAME(sin6);
1087                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1088                 return (error);
1089         }
1090         *addr = (struct sockaddr *)sin6;
1091         return (0);
1092 }
1093
1094 static int
1095 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1096 {
1097         struct in6pcb *inp6 = sotoin6pcb(so);
1098         int error;
1099
1100         if (inp6 == NULL) {
1101                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1102                 return (EINVAL);
1103         }
1104         /* allow v6 addresses precedence */
1105         error = sctp6_getaddr(so, nam);
1106 #ifdef INET
1107         if (error) {
1108                 struct sockaddr_in6 *sin6;
1109
1110                 /* try v4 next if v6 failed */
1111                 error = sctp_ingetaddr(so, nam);
1112                 if (error) {
1113                         return (error);
1114                 }
1115                 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1116                 if (sin6 == NULL) {
1117                         SCTP_FREE_SONAME(*nam);
1118                         return (ENOMEM);
1119                 }
1120                 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1121                 SCTP_FREE_SONAME(*nam);
1122                 *nam = (struct sockaddr *)sin6;
1123         }
1124 #endif
1125         return (error);
1126 }
1127
1128
1129 static int
1130 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1131 {
1132         struct in6pcb *inp6 = sotoin6pcb(so);
1133         int error;
1134
1135         if (inp6 == NULL) {
1136                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1137                 return (EINVAL);
1138         }
1139         /* allow v6 addresses precedence */
1140         error = sctp6_peeraddr(so, nam);
1141 #ifdef INET
1142         if (error) {
1143                 struct sockaddr_in6 *sin6;
1144
1145                 /* try v4 next if v6 failed */
1146                 error = sctp_peeraddr(so, nam);
1147                 if (error) {
1148                         return (error);
1149                 }
1150                 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1151                 if (sin6 == NULL) {
1152                         SCTP_FREE_SONAME(*nam);
1153                         return (ENOMEM);
1154                 }
1155                 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1156                 SCTP_FREE_SONAME(*nam);
1157                 *nam = (struct sockaddr *)sin6;
1158         }
1159 #endif
1160         return (error);
1161 }
1162
1163 struct pr_usrreqs sctp6_usrreqs = {
1164         .pru_abort = sctp6_abort,
1165         .pru_accept = sctp_accept,
1166         .pru_attach = sctp6_attach,
1167         .pru_bind = sctp6_bind,
1168         .pru_connect = sctp6_connect,
1169         .pru_control = in6_control,
1170         .pru_close = sctp6_close,
1171         .pru_detach = sctp6_close,
1172         .pru_sopoll = sopoll_generic,
1173         .pru_flush = sctp_flush,
1174         .pru_disconnect = sctp6_disconnect,
1175         .pru_listen = sctp_listen,
1176         .pru_peeraddr = sctp6_getpeeraddr,
1177         .pru_send = sctp6_send,
1178         .pru_shutdown = sctp_shutdown,
1179         .pru_sockaddr = sctp6_in6getaddr,
1180         .pru_sosend = sctp_sosend,
1181         .pru_soreceive = sctp_soreceive
1182 };
1183
1184 #endif