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 int
  61 sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port)
  62 {
  63         struct mbuf *m;
  64         int iphlen;
  65         uint32_t vrf_id;
  66         uint8_t ecn_bits;
  67         struct sockaddr_in6 src, dst;
  68         struct ip6_hdr *ip6;
  69         struct sctphdr *sh;
  70         struct sctp_chunkhdr *ch;
  71         int length, offset;
  72         uint8_t compute_crc;
  73         uint32_t mflowid;
  74         uint8_t mflowtype;
  75         uint16_t fibnum;
  76
  77         iphlen = *offp;
  78         if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) {
  79                 SCTP_RELEASE_PKT(*i_pak);
  80                 return (IPPROTO_DONE);
  81         }
  82         m = SCTP_HEADER_TO_CHAIN(*i_pak);
  83 #ifdef SCTP_MBUF_LOGGING
  84         /* Log in any input mbufs */
  85         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
  86                 sctp_log_mbc(m, SCTP_MBUF_INPUT);
  87         }
  88 #endif
  89 #ifdef SCTP_PACKET_LOGGING
  90         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
  91                 sctp_packet_log(m);
  92         }
  93 #endif
  94         SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
  95             "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
  96             m->m_pkthdr.len,
  97             if_name(m->m_pkthdr.rcvif),
  98             (int)m->m_pkthdr.csum_flags, CSUM_BITS);
  99         mflowid = m->m_pkthdr.flowid;
 100         mflowtype = M_HASHTYPE_GET(m);
 101         fibnum = M_GETFIB(m);
 102         SCTP_STAT_INCR(sctps_recvpackets);
 103         SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
 104         /* Get IP, SCTP, and first chunk header together in the first mbuf. */
 105         offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
 106         if (m->m_len < offset) {
 107                 m = m_pullup(m, offset);
 108                 if (m == NULL) {
 109                         SCTP_STAT_INCR(sctps_hdrops);
 110                         return (IPPROTO_DONE);
 111                 }
 112         }
 113         ip6 = mtod(m, struct ip6_hdr *);
 114         sh = (struct sctphdr *)(mtod(m, caddr_t)+iphlen);
 115         ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
 116         offset -= sizeof(struct sctp_chunkhdr);
 117         memset(&src, 0, sizeof(struct sockaddr_in6));
 118         src.sin6_family = AF_INET6;
 119         src.sin6_len = sizeof(struct sockaddr_in6);
 120         src.sin6_port = sh->src_port;
 121         src.sin6_addr = ip6->ip6_src;
 122         if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
 123                 goto out;
 124         }
 125         memset(&dst, 0, sizeof(struct sockaddr_in6));
 126         dst.sin6_family = AF_INET6;
 127         dst.sin6_len = sizeof(struct sockaddr_in6);
 128         dst.sin6_port = sh->dest_port;
 129         dst.sin6_addr = ip6->ip6_dst;
 130         if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
 131                 goto out;
 132         }
 133         length = ntohs(ip6->ip6_plen) + iphlen;
 134         /* Validate mbuf chain length with IP payload length. */
 135         if (SCTP_HEADER_LEN(m) != length) {
 136                 SCTPDBG(SCTP_DEBUG_INPUT1,
 137                     "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
 138                 SCTP_STAT_INCR(sctps_hdrops);
 139                 goto out;
 140         }
 141         if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
 142                 goto out;
 143         }
 144         ecn_bits = ((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         int timer_stopped;
 183
 184         switch (icmp6_type) {
 185         case ICMP6_DST_UNREACH:
 186                 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
 187                     (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
 188                     (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
 189                     (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
 190                         /* Mark the net unreachable. */
 191                         if (net->dest_state & SCTP_ADDR_REACHABLE) {
 192                                 /* Ok that destination is not reachable */
 193                                 net->dest_state &= ~SCTP_ADDR_REACHABLE;
 194                                 net->dest_state &= ~SCTP_ADDR_PF;
 195                                 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
 196                                     stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
 197                         }
 198                 }
 199                 SCTP_TCB_UNLOCK(stcb);
 200                 break;
 201         case ICMP6_PARAM_PROB:
 202                 /* Treat it like an ABORT. */
 203                 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
 204                         sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
 205                         (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
 206                             SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
 207                 } else {
 208                         SCTP_TCB_UNLOCK(stcb);
 209                 }
 210                 break;
 211         case ICMP6_PACKET_TOO_BIG:
 212                 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
 213                         SCTP_TCB_UNLOCK(stcb);
 214                         break;
 215                 }
 216                 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
 217                         timer_stopped = 1;
 218                         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
 219                             SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
 220                 } else {
 221                         timer_stopped = 0;
 222                 }
 223                 /* Update the path MTU. */
 224                 if (net->port) {
 225                         next_mtu -= sizeof(struct udphdr);
 226                 }
 227                 if (net->mtu > next_mtu) {
 228                         net->mtu = next_mtu;
 229                         if (net->port) {
 230                                 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr));
 231                         } else {
 232                                 sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu);
 233                         }
 234                 }
 235                 /* Update the association MTU */
 236                 if (stcb->asoc.smallest_mtu > next_mtu) {
 237                         sctp_pathmtu_adjustment(stcb, next_mtu);
 238                 }
 239                 /* Finally, start the PMTU timer if it was running before. */
 240                 if (timer_stopped) {
 241                         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
 242                 }
 243                 SCTP_TCB_UNLOCK(stcb);
 244                 break;
 245         default:
 246                 SCTP_TCB_UNLOCK(stcb);
 247                 break;
 248         }
 249 }
 250
 251 void
 252 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
 253 {
 254         struct ip6ctlparam *ip6cp;
 255         struct sctp_inpcb *inp;
 256         struct sctp_tcb *stcb;
 257         struct sctp_nets *net;
 258         struct sctphdr sh;
 259         struct sockaddr_in6 src, dst;
 260
 261         if (pktdst->sa_family != AF_INET6 ||
 262             pktdst->sa_len != sizeof(struct sockaddr_in6)) {
 263                 return;
 264         }
 265
 266         if ((unsigned)cmd >= PRC_NCMDS) {
 267                 return;
 268         }
 269         if (PRC_IS_REDIRECT(cmd)) {
 270                 d = NULL;
 271         } else if (inet6ctlerrmap[cmd] == 0) {
 272                 return;
 273         }
 274         /* If the parameter is from icmp6, decode it. */
 275         if (d != NULL) {
 276                 ip6cp = (struct ip6ctlparam *)d;
 277         } else {
 278                 ip6cp = (struct ip6ctlparam *)NULL;
 279         }
 280
 281         if (ip6cp != NULL) {
 282                 /*
 283                  * XXX: We assume that when IPV6 is non NULL, M and OFF are
 284                  * valid.
 285                  */
 286                 if (ip6cp->ip6c_m == NULL) {
 287                         return;
 288                 }
 289
 290                 /*
 291                  * Check if we can safely examine the ports and the
 292                  * verification tag of the SCTP common header.
 293                  */
 294                 if (ip6cp->ip6c_m->m_pkthdr.len <
 295                     (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
 296                         return;
 297                 }
 298
 299                 /* Copy out the port numbers and the verification tag. */
 300                 memset(&sh, 0, sizeof(sh));
 301                 m_copydata(ip6cp->ip6c_m,
 302                     ip6cp->ip6c_off,
 303                     sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
 304                     (caddr_t)&sh);
 305                 memset(&src, 0, sizeof(struct sockaddr_in6));
 306                 src.sin6_family = AF_INET6;
 307                 src.sin6_len = sizeof(struct sockaddr_in6);
 308                 src.sin6_port = sh.src_port;
 309                 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
 310                 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
 311                         return;
 312                 }
 313                 memset(&dst, 0, sizeof(struct sockaddr_in6));
 314                 dst.sin6_family = AF_INET6;
 315                 dst.sin6_len = sizeof(struct sockaddr_in6);
 316                 dst.sin6_port = sh.dest_port;
 317                 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
 318                 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
 319                         return;
 320                 }
 321                 inp = NULL;
 322                 net = NULL;
 323                 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
 324                     (struct sockaddr *)&src,
 325                     &inp, &net, 1, SCTP_DEFAULT_VRFID);
 326                 if ((stcb != NULL) &&
 327                     (net != NULL) &&
 328                     (inp != NULL)) {
 329                         /* Check the verification tag */
 330                         if (ntohl(sh.v_tag) != 0) {
 331                                 /*
 332                                  * This must be the verification tag used
 333                                  * for sending out packets. We don't
 334                                  * consider packets reflecting the
 335                                  * verification tag.
 336                                  */
 337                                 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
 338                                         SCTP_TCB_UNLOCK(stcb);
 339                                         return;
 340                                 }
 341                         } else {
 342                                 if (ip6cp->ip6c_m->m_pkthdr.len >=
 343                                     ip6cp->ip6c_off + sizeof(struct sctphdr) +
 344                                     sizeof(struct sctp_chunkhdr) +
 345                                     offsetof(struct sctp_init, a_rwnd)) {
 346                                         /*
 347                                          * In this case we can check if we
 348                                          * got an INIT chunk and if the
 349                                          * initiate tag matches.
 350                                          */
 351                                         uint32_t initiate_tag;
 352                                         uint8_t chunk_type;
 353
 354                                         m_copydata(ip6cp->ip6c_m,
 355                                             ip6cp->ip6c_off +
 356                                             sizeof(struct sctphdr),
 357                                             sizeof(uint8_t),
 358                                             (caddr_t)&chunk_type);
 359                                         m_copydata(ip6cp->ip6c_m,
 360                                             ip6cp->ip6c_off +
 361                                             sizeof(struct sctphdr) +
 362                                             sizeof(struct sctp_chunkhdr),
 363                                             sizeof(uint32_t),
 364                                             (caddr_t)&initiate_tag);
 365                                         if ((chunk_type != SCTP_INITIATION) ||
 366                                             (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
 367                                                 SCTP_TCB_UNLOCK(stcb);
 368                                                 return;
 369                                         }
 370                                 } else {
 371                                         SCTP_TCB_UNLOCK(stcb);
 372                                         return;
 373                                 }
 374                         }
 375                         sctp6_notify(inp, stcb, net,
 376                             ip6cp->ip6c_icmp6->icmp6_type,
 377                             ip6cp->ip6c_icmp6->icmp6_code,
 378                             ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
 379                 } else {
 380                         if ((stcb == NULL) && (inp != NULL)) {
 381                                 /* reduce inp's ref-count */
 382                                 SCTP_INP_WLOCK(inp);
 383                                 SCTP_INP_DECR_REF(inp);
 384                                 SCTP_INP_WUNLOCK(inp);
 385                         }
 386                         if (stcb) {
 387                                 SCTP_TCB_UNLOCK(stcb);
 388                         }
 389                 }
 390         }
 391 }
 392
 393 /*
 394  * this routine can probably be collasped into the one in sctp_userreq.c
 395  * since they do the same thing and now we lookup with a sockaddr
 396  */
 397 static int
 398 sctp6_getcred(SYSCTL_HANDLER_ARGS)
 399 {
 400         struct xucred xuc;
 401         struct sockaddr_in6 addrs[2];
 402         struct sctp_inpcb *inp;
 403         struct sctp_nets *net;
 404         struct sctp_tcb *stcb;
 405         int error;
 406         uint32_t vrf_id;
 407
 408         vrf_id = SCTP_DEFAULT_VRFID;
 409
 410         error = priv_check(req->td, PRIV_NETINET_GETCRED);
 411         if (error)
 412                 return (error);
 413
 414         if (req->newlen != sizeof(addrs)) {
 415                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 416                 return (EINVAL);
 417         }
 418         if (req->oldlen != sizeof(struct ucred)) {
 419                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 420                 return (EINVAL);
 421         }
 422         error = SYSCTL_IN(req, addrs, sizeof(addrs));
 423         if (error)
 424                 return (error);
 425
 426         stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
 427             sin6tosa(&addrs[0]),
 428             &inp, &net, 1, vrf_id);
 429         if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
 430                 if ((inp != NULL) && (stcb == NULL)) {
 431                         /* reduce ref-count */
 432                         SCTP_INP_WLOCK(inp);
 433                         SCTP_INP_DECR_REF(inp);
 434                         goto cred_can_cont;
 435                 }
 436                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
 437                 error = ENOENT;
 438                 goto out;
 439         }
 440         SCTP_TCB_UNLOCK(stcb);
 441         /*
 442          * We use the write lock here, only since in the error leg we need
 443          * it. If we used RLOCK, then we would have to
 444          * wlock/decr/unlock/rlock. Which in theory could create a hole.
 445          * Better to use higher wlock.
 446          */
 447         SCTP_INP_WLOCK(inp);
 448 cred_can_cont:
 449         error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
 450         if (error) {
 451                 SCTP_INP_WUNLOCK(inp);
 452                 goto out;
 453         }
 454         cru2x(inp->sctp_socket->so_cred, &xuc);
 455         SCTP_INP_WUNLOCK(inp);
 456         error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
 457 out:
 458         return (error);
 459 }
 460
 461 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred,
 462     CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 463     0, 0, sctp6_getcred, "S,ucred",
 464     "Get the ucred of a SCTP6 connection");
 465
 466
 467 /* This is the same as the sctp_abort() could be made common */
 468 static void
 469 sctp6_abort(struct socket *so)
 470 {
 471         struct epoch_tracker et;
 472         struct sctp_inpcb *inp;
 473         uint32_t flags;
 474
 475         inp = (struct sctp_inpcb *)so->so_pcb;
 476         if (inp == NULL) {
 477                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 478                 return;
 479         }
 480         NET_EPOCH_ENTER(et);
 481 sctp_must_try_again:
 482         flags = inp->sctp_flags;
 483 #ifdef SCTP_LOG_CLOSING
 484         sctp_log_closing(inp, NULL, 17);
 485 #endif
 486         if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
 487             (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
 488 #ifdef SCTP_LOG_CLOSING
 489                 sctp_log_closing(inp, NULL, 16);
 490 #endif
 491                 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
 492                     SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
 493                 SOCK_LOCK(so);
 494                 SCTP_SB_CLEAR(so->so_snd);
 495                 /*
 496                  * same for the rcv ones, they are only here for the
 497                  * accounting/select.
 498                  */
 499                 SCTP_SB_CLEAR(so->so_rcv);
 500                 /* Now null out the reference, we are completely detached. */
 501                 so->so_pcb = NULL;
 502                 SOCK_UNLOCK(so);
 503         } else {
 504                 flags = inp->sctp_flags;
 505                 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
 506                         goto sctp_must_try_again;
 507                 }
 508         }
 509         NET_EPOCH_EXIT(et);
 510         return;
 511 }
 512
 513 static int
 514 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
 515 {
 516         int error;
 517         struct sctp_inpcb *inp;
 518         uint32_t vrf_id = SCTP_DEFAULT_VRFID;
 519
 520         inp = (struct sctp_inpcb *)so->so_pcb;
 521         if (inp != NULL) {
 522                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 523                 return (EINVAL);
 524         }
 525
 526         if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
 527                 error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace));
 528                 if (error)
 529                         return (error);
 530         }
 531         error = sctp_inpcb_alloc(so, vrf_id);
 532         if (error)
 533                 return (error);
 534         inp = (struct sctp_inpcb *)so->so_pcb;
 535         SCTP_INP_WLOCK(inp);
 536         inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6;     /* I'm v6! */
 537
 538         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 539         inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */
 540         inp->ip_inp.inp.in6p_cksum = -1;        /* just to be sure */
 541 #ifdef INET
 542         /*
 543          * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
 544          * socket as well, because the socket may be bound to an IPv6
 545          * wildcard address, which may match an IPv4-mapped IPv6 address.
 546          */
 547         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
 548 #endif
 549         SCTP_INP_WUNLOCK(inp);
 550         return (0);
 551 }
 552
 553 static int
 554 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
 555 {
 556         struct sctp_inpcb *inp;
 557         int error;
 558         u_char vflagsav;
 559
 560         inp = (struct sctp_inpcb *)so->so_pcb;
 561         if (inp == NULL) {
 562                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 563                 return (EINVAL);
 564         }
 565
 566         if (addr) {
 567                 switch (addr->sa_family) {
 568 #ifdef INET
 569                 case AF_INET:
 570                         if (addr->sa_len != sizeof(struct sockaddr_in)) {
 571                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 572                                 return (EINVAL);
 573                         }
 574                         break;
 575 #endif
 576 #ifdef INET6
 577                 case AF_INET6:
 578                         if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 579                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 580                                 return (EINVAL);
 581                         }
 582                         break;
 583 #endif
 584                 default:
 585                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 586                         return (EINVAL);
 587                 }
 588         }
 589         vflagsav = inp->ip_inp.inp.inp_vflag;
 590         inp->ip_inp.inp.inp_vflag &= ~INP_IPV4;
 591         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
 592         if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) {
 593                 switch (addr->sa_family) {
 594 #ifdef INET
 595                 case AF_INET:
 596                         /* binding v4 addr to v6 socket, so reset flags */
 597                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 598                         inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
 599                         break;
 600 #endif
 601 #ifdef INET6
 602                 case AF_INET6:
 603                         {
 604                                 struct sockaddr_in6 *sin6_p;
 605
 606                                 sin6_p = (struct sockaddr_in6 *)addr;
 607
 608                                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
 609                                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 610                                 }
 611 #ifdef INET
 612                                 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
 613                                         struct sockaddr_in sin;
 614
 615                                         in6_sin6_2_sin(&sin, sin6_p);
 616                                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
 617                                         inp->ip_inp.inp.inp_vflag &= ~INP_IPV6;
 618                                         error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p);
 619                                         goto out;
 620                                 }
 621 #endif
 622                                 break;
 623                         }
 624 #endif
 625                 default:
 626                         break;
 627                 }
 628         } else if (addr != NULL) {
 629                 struct sockaddr_in6 *sin6_p;
 630
 631                 /* IPV6_V6ONLY socket */
 632 #ifdef INET
 633                 if (addr->sa_family == AF_INET) {
 634                         /* can't bind v4 addr to v6 only socket! */
 635                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 636                         error = EINVAL;
 637                         goto out;
 638                 }
 639 #endif
 640                 sin6_p = (struct sockaddr_in6 *)addr;
 641
 642                 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
 643                         /* can't bind v4-mapped addrs either! */
 644                         /* NOTE: we don't support SIIT */
 645                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 646                         error = EINVAL;
 647                         goto out;
 648                 }
 649         }
 650         error = sctp_inpcb_bind(so, addr, NULL, p);
 651 out:
 652         if (error != 0)
 653                 inp->ip_inp.inp.inp_vflag = vflagsav;
 654         return (error);
 655 }
 656
 657
 658 static void
 659 sctp6_close(struct socket *so)
 660 {
 661         sctp_close(so);
 662 }
 663
 664 /* This could be made common with sctp_detach() since they are identical */
 665
 666 static
 667 int
 668 sctp6_disconnect(struct socket *so)
 669 {
 670         return (sctp_disconnect(so));
 671 }
 672
 673
 674 int
 675 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
 676     struct mbuf *control, struct thread *p);
 677
 678
 679 static int
 680 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
 681     struct mbuf *control, struct thread *p)
 682 {
 683         struct sctp_inpcb *inp;
 684
 685 #ifdef INET
 686         struct sockaddr_in6 *sin6;
 687 #endif                          /* INET */
 688         /* No SPL needed since sctp_output does this */
 689
 690         inp = (struct sctp_inpcb *)so->so_pcb;
 691         if (inp == NULL) {
 692                 if (control) {
 693                         SCTP_RELEASE_PKT(control);
 694                         control = NULL;
 695                 }
 696                 SCTP_RELEASE_PKT(m);
 697                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 698                 return (EINVAL);
 699         }
 700         /*
 701          * For the TCP model we may get a NULL addr, if we are a connected
 702          * socket thats ok.
 703          */
 704         if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
 705             (addr == NULL)) {
 706                 goto connected_type;
 707         }
 708         if (addr == NULL) {
 709                 SCTP_RELEASE_PKT(m);
 710                 if (control) {
 711                         SCTP_RELEASE_PKT(control);
 712                         control = NULL;
 713                 }
 714                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
 715                 return (EDESTADDRREQ);
 716         }
 717 #ifdef INET
 718         sin6 = (struct sockaddr_in6 *)addr;
 719         if (SCTP_IPV6_V6ONLY(inp)) {
 720                 /*
 721                  * if IPV6_V6ONLY flag, we discard datagrams destined to a
 722                  * v4 addr or v4-mapped addr
 723                  */
 724                 if (addr->sa_family == AF_INET) {
 725                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 726                         return (EINVAL);
 727                 }
 728                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 729                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 730                         return (EINVAL);
 731                 }
 732         }
 733         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 734                 struct sockaddr_in sin;
 735
 736                 /* convert v4-mapped into v4 addr and send */
 737                 in6_sin6_2_sin(&sin, sin6);
 738                 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
 739         }
 740 #endif                          /* INET */
 741 connected_type:
 742         /* now what about control */
 743         if (control) {
 744                 if (inp->control) {
 745                         SCTP_PRINTF("huh? control set?\n");
 746                         SCTP_RELEASE_PKT(inp->control);
 747                         inp->control = NULL;
 748                 }
 749                 inp->control = control;
 750         }
 751         /* Place the data */
 752         if (inp->pkt) {
 753                 SCTP_BUF_NEXT(inp->pkt_last) = m;
 754                 inp->pkt_last = m;
 755         } else {
 756                 inp->pkt_last = inp->pkt = m;
 757         }
 758         if (
 759         /* FreeBSD and MacOSX uses a flag passed */
 760             ((flags & PRUS_MORETOCOME) == 0)
 761             ) {
 762                 /*
 763                  * note with the current version this code will only be used
 764                  * by OpenBSD, NetBSD and FreeBSD have methods for
 765                  * re-defining sosend() to use sctp_sosend().  One can
 766                  * optionaly switch back to this code (by changing back the
 767                  * defininitions but this is not advisable.
 768                  */
 769                 struct epoch_tracker et;
 770                 int ret;
 771
 772                 NET_EPOCH_ENTER(et);
 773                 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
 774                 NET_EPOCH_EXIT(et);
 775                 inp->pkt = NULL;
 776                 inp->control = NULL;
 777                 return (ret);
 778         } else {
 779                 return (0);
 780         }
 781 }
 782
 783 static int
 784 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
 785 {
 786         struct epoch_tracker et;
 787         uint32_t vrf_id;
 788         int error = 0;
 789         struct sctp_inpcb *inp;
 790         struct sctp_tcb *stcb;
 791 #ifdef INET
 792         struct sockaddr_in6 *sin6;
 793         union sctp_sockstore store;
 794 #endif
 795
 796         inp = (struct sctp_inpcb *)so->so_pcb;
 797         if (inp == NULL) {
 798                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
 799                 return (ECONNRESET);    /* I made the same as TCP since we are
 800                                          * not setup? */
 801         }
 802         if (addr == NULL) {
 803                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 804                 return (EINVAL);
 805         }
 806         switch (addr->sa_family) {
 807 #ifdef INET
 808         case AF_INET:
 809                 if (addr->sa_len != sizeof(struct sockaddr_in)) {
 810                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 811                         return (EINVAL);
 812                 }
 813                 break;
 814 #endif
 815 #ifdef INET6
 816         case AF_INET6:
 817                 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 818                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 819                         return (EINVAL);
 820                 }
 821                 break;
 822 #endif
 823         default:
 824                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 825                 return (EINVAL);
 826         }
 827
 828         vrf_id = inp->def_vrf_id;
 829         SCTP_ASOC_CREATE_LOCK(inp);
 830         SCTP_INP_RLOCK(inp);
 831         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
 832             SCTP_PCB_FLAGS_UNBOUND) {
 833                 /* Bind a ephemeral port */
 834                 SCTP_INP_RUNLOCK(inp);
 835                 error = sctp6_bind(so, NULL, p);
 836                 if (error) {
 837                         SCTP_ASOC_CREATE_UNLOCK(inp);
 838
 839                         return (error);
 840                 }
 841                 SCTP_INP_RLOCK(inp);
 842         }
 843         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
 844             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
 845                 /* We are already connected AND the TCP model */
 846                 SCTP_INP_RUNLOCK(inp);
 847                 SCTP_ASOC_CREATE_UNLOCK(inp);
 848                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
 849                 return (EADDRINUSE);
 850         }
 851 #ifdef INET
 852         sin6 = (struct sockaddr_in6 *)addr;
 853         if (SCTP_IPV6_V6ONLY(inp)) {
 854                 /*
 855                  * if IPV6_V6ONLY flag, ignore connections destined to a v4
 856                  * addr or v4-mapped addr
 857                  */
 858                 if (addr->sa_family == AF_INET) {
 859                         SCTP_INP_RUNLOCK(inp);
 860                         SCTP_ASOC_CREATE_UNLOCK(inp);
 861                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 862                         return (EINVAL);
 863                 }
 864                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 865                         SCTP_INP_RUNLOCK(inp);
 866                         SCTP_ASOC_CREATE_UNLOCK(inp);
 867                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 868                         return (EINVAL);
 869                 }
 870         }
 871         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 872                 /* convert v4-mapped into v4 addr */
 873                 in6_sin6_2_sin(&store.sin, sin6);
 874                 addr = &store.sa;
 875         }
 876 #endif                          /* INET */
 877         /* Now do we connect? */
 878         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 879                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 880                 if (stcb) {
 881                         SCTP_TCB_LOCK(stcb);
 882                 }
 883                 SCTP_INP_RUNLOCK(inp);
 884         } else {
 885                 SCTP_INP_RUNLOCK(inp);
 886                 SCTP_INP_WLOCK(inp);
 887                 SCTP_INP_INCR_REF(inp);
 888                 SCTP_INP_WUNLOCK(inp);
 889                 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
 890                 if (stcb == NULL) {
 891                         SCTP_INP_WLOCK(inp);
 892                         SCTP_INP_DECR_REF(inp);
 893                         SCTP_INP_WUNLOCK(inp);
 894                 }
 895         }
 896
 897         if (stcb != NULL) {
 898                 /* Already have or am bring up an association */
 899                 SCTP_ASOC_CREATE_UNLOCK(inp);
 900                 SCTP_TCB_UNLOCK(stcb);
 901                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
 902                 return (EALREADY);
 903         }
 904         /* We are GOOD to go */
 905         stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
 906             inp->sctp_ep.pre_open_stream_count,
 907             inp->sctp_ep.port, p,
 908             SCTP_INITIALIZE_AUTH_PARAMS);
 909         SCTP_ASOC_CREATE_UNLOCK(inp);
 910         if (stcb == NULL) {
 911                 /* Gak! no memory */
 912                 return (error);
 913         }
 914         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 915                 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
 916                 /* Set the connected flag so we can queue data */
 917                 soisconnecting(so);
 918         }
 919         SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
 920         (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
 921         NET_EPOCH_ENTER(et);
 922         sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
 923         SCTP_TCB_UNLOCK(stcb);
 924         NET_EPOCH_EXIT(et);
 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 inpcb *inp = sotoinpcb(so);
1098         int error;
1099
1100         if (inp == NULL) {
1101                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1102                 return (EINVAL);
1103         }
1104
1105         /* allow v6 addresses precedence */
1106         error = sctp6_getaddr(so, nam);
1107 #ifdef INET
1108         if (error) {
1109                 struct sockaddr_in6 *sin6;
1110
1111                 /* try v4 next if v6 failed */
1112                 error = sctp_ingetaddr(so, nam);
1113                 if (error) {
1114                         return (error);
1115                 }
1116                 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1117                 if (sin6 == NULL) {
1118                         SCTP_FREE_SONAME(*nam);
1119                         return (ENOMEM);
1120                 }
1121                 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1122                 SCTP_FREE_SONAME(*nam);
1123                 *nam = (struct sockaddr *)sin6;
1124         }
1125 #endif
1126         return (error);
1127 }
1128
1129
1130 static int
1131 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1132 {
1133         struct inpcb *inp = sotoinpcb(so);
1134         int error;
1135
1136         if (inp == NULL) {
1137                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1138                 return (EINVAL);
1139         }
1140
1141         /* allow v6 addresses precedence */
1142         error = sctp6_peeraddr(so, nam);
1143 #ifdef INET
1144         if (error) {
1145                 struct sockaddr_in6 *sin6;
1146
1147                 /* try v4 next if v6 failed */
1148                 error = sctp_peeraddr(so, nam);
1149                 if (error) {
1150                         return (error);
1151                 }
1152                 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1153                 if (sin6 == NULL) {
1154                         SCTP_FREE_SONAME(*nam);
1155                         return (ENOMEM);
1156                 }
1157                 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1158                 SCTP_FREE_SONAME(*nam);
1159                 *nam = (struct sockaddr *)sin6;
1160         }
1161 #endif
1162         return (error);
1163 }
1164
1165 struct pr_usrreqs sctp6_usrreqs = {
1166         .pru_abort = sctp6_abort,
1167         .pru_accept = sctp_accept,
1168         .pru_attach = sctp6_attach,
1169         .pru_bind = sctp6_bind,
1170         .pru_connect = sctp6_connect,
1171         .pru_control = in6_control,
1172         .pru_close = sctp6_close,
1173         .pru_detach = sctp6_close,
1174         .pru_sopoll = sopoll_generic,
1175         .pru_flush = sctp_flush,
1176         .pru_disconnect = sctp6_disconnect,
1177         .pru_listen = sctp_listen,
1178         .pru_peeraddr = sctp6_getpeeraddr,
1179         .pru_send = sctp6_send,
1180         .pru_shutdown = sctp_shutdown,
1181         .pru_sockaddr = sctp6_in6getaddr,
1182         .pru_sosend = sctp_sosend,
1183         .pru_soreceive = sctp_soreceive
1184 };
1185
1186 #endif