sys/netinet6/sctp6_usrreq.c

   1 /*-
   2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #ifdef INET6
  38 #include <sys/proc.h>
  39 #include <netinet/sctp_pcb.h>
  40 #include <netinet/sctp_header.h>
  41 #include <netinet/sctp_var.h>
  42 #include <netinet6/sctp6_var.h>
  43 #include <netinet/sctp_sysctl.h>
  44 #include <netinet/sctp_output.h>
  45 #include <netinet/sctp_uio.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctputil.h>
  48 #include <netinet/sctp_indata.h>
  49 #include <netinet/sctp_timer.h>
  50 #include <netinet/sctp_auth.h>
  51 #include <netinet/sctp_input.h>
  52 #include <netinet/sctp_output.h>
  53 #include <netinet/sctp_bsd_addr.h>
  54 #include <netinet/sctp_crc32.h>
  55 #include <netinet/icmp6.h>
  56 #include <netinet/udp.h>
  57
  58 extern struct protosw inetsw[];
  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         ip6 = mtod(m, struct ip6_hdr *);
 107         IP6_EXTHDR_GET(sh, struct sctphdr *, m, iphlen,
 108             (int)(sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr)));
 109         if (sh == NULL) {
 110                 SCTP_STAT_INCR(sctps_hdrops);
 111                 return (IPPROTO_DONE);
 112         }
 113         ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
 114         offset -= sizeof(struct sctp_chunkhdr);
 115         memset(&src, 0, sizeof(struct sockaddr_in6));
 116         src.sin6_family = AF_INET6;
 117         src.sin6_len = sizeof(struct sockaddr_in6);
 118         src.sin6_port = sh->src_port;
 119         src.sin6_addr = ip6->ip6_src;
 120         if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
 121                 goto out;
 122         }
 123         memset(&dst, 0, sizeof(struct sockaddr_in6));
 124         dst.sin6_family = AF_INET6;
 125         dst.sin6_len = sizeof(struct sockaddr_in6);
 126         dst.sin6_port = sh->dest_port;
 127         dst.sin6_addr = ip6->ip6_dst;
 128         if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) {
 129                 goto out;
 130         }
 131         length = ntohs(ip6->ip6_plen) + iphlen;
 132         /* Validate mbuf chain length with IP payload length. */
 133         if (SCTP_HEADER_LEN(m) != length) {
 134                 SCTPDBG(SCTP_DEBUG_INPUT1,
 135                     "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
 136                 SCTP_STAT_INCR(sctps_hdrops);
 137                 goto out;
 138         }
 139         if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
 140                 goto out;
 141         }
 142         ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
 143         if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
 144                 SCTP_STAT_INCR(sctps_recvhwcrc);
 145                 compute_crc = 0;
 146         } else {
 147                 SCTP_STAT_INCR(sctps_recvswcrc);
 148                 compute_crc = 1;
 149         }
 150         sctp_common_input_processing(&m, iphlen, offset, length,
 151             (struct sockaddr *)&src,
 152             (struct sockaddr *)&dst,
 153             sh, ch,
 154             compute_crc,
 155             ecn_bits,
 156             mflowtype, mflowid, fibnum,
 157             vrf_id, port);
 158 out:
 159         if (m) {
 160                 sctp_m_freem(m);
 161         }
 162         return (IPPROTO_DONE);
 163 }
 164
 165
 166 int
 167 sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED)
 168 {
 169         return (sctp6_input_with_port(i_pak, offp, 0));
 170 }
 171
 172 void
 173 sctp6_notify(struct sctp_inpcb *inp,
 174     struct sctp_tcb *stcb,
 175     struct sctp_nets *net,
 176     uint8_t icmp6_type,
 177     uint8_t icmp6_code,
 178     uint32_t next_mtu)
 179 {
 180 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 181         struct socket *so;
 182 #endif
 183         int timer_stopped;
 184
 185         switch (icmp6_type) {
 186         case ICMP6_DST_UNREACH:
 187                 if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) ||
 188                     (icmp6_code == ICMP6_DST_UNREACH_ADMIN) ||
 189                     (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) ||
 190                     (icmp6_code == ICMP6_DST_UNREACH_ADDR)) {
 191                         /* Mark the net unreachable. */
 192                         if (net->dest_state & SCTP_ADDR_REACHABLE) {
 193                                 /* Ok that destination is not reachable */
 194                                 net->dest_state &= ~SCTP_ADDR_REACHABLE;
 195                                 net->dest_state &= ~SCTP_ADDR_PF;
 196                                 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
 197                                     stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED);
 198                         }
 199                 }
 200                 SCTP_TCB_UNLOCK(stcb);
 201                 break;
 202         case ICMP6_PARAM_PROB:
 203                 /* Treat it like an ABORT. */
 204                 if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) {
 205                         sctp_abort_notification(stcb, 1, 0, NULL, SCTP_SO_NOT_LOCKED);
 206 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 207                         so = SCTP_INP_SO(inp);
 208                         atomic_add_int(&stcb->asoc.refcnt, 1);
 209                         SCTP_TCB_UNLOCK(stcb);
 210                         SCTP_SOCKET_LOCK(so, 1);
 211                         SCTP_TCB_LOCK(stcb);
 212                         atomic_subtract_int(&stcb->asoc.refcnt, 1);
 213 #endif
 214                         (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
 215                             SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2);
 216 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
 217                         SCTP_SOCKET_UNLOCK(so, 1);
 218 #endif
 219                 } else {
 220                         SCTP_TCB_UNLOCK(stcb);
 221                 }
 222                 break;
 223         case ICMP6_PACKET_TOO_BIG:
 224                 if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
 225                         SCTP_TCB_UNLOCK(stcb);
 226                         break;
 227                 }
 228                 if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) {
 229                         timer_stopped = 1;
 230                         sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net,
 231                             SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1);
 232                 } else {
 233                         timer_stopped = 0;
 234                 }
 235                 /* Update the path MTU. */
 236                 if (net->port) {
 237                         next_mtu -= sizeof(struct udphdr);
 238                 }
 239                 if (net->mtu > next_mtu) {
 240                         net->mtu = next_mtu;
 241                 }
 242                 /* Update the association MTU */
 243                 if (stcb->asoc.smallest_mtu > next_mtu) {
 244                         sctp_pathmtu_adjustment(stcb, next_mtu);
 245                 }
 246                 /* Finally, start the PMTU timer if it was running before. */
 247                 if (timer_stopped) {
 248                         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net);
 249                 }
 250                 SCTP_TCB_UNLOCK(stcb);
 251                 break;
 252         default:
 253                 SCTP_TCB_UNLOCK(stcb);
 254                 break;
 255         }
 256 }
 257
 258 void
 259 sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d)
 260 {
 261         struct ip6ctlparam *ip6cp;
 262         struct sctp_inpcb *inp;
 263         struct sctp_tcb *stcb;
 264         struct sctp_nets *net;
 265         struct sctphdr sh;
 266         struct sockaddr_in6 src, dst;
 267
 268         if (pktdst->sa_family != AF_INET6 ||
 269             pktdst->sa_len != sizeof(struct sockaddr_in6)) {
 270                 return;
 271         }
 272         if ((unsigned)cmd >= PRC_NCMDS) {
 273                 return;
 274         }
 275         if (PRC_IS_REDIRECT(cmd)) {
 276                 d = NULL;
 277         } else if (inet6ctlerrmap[cmd] == 0) {
 278                 return;
 279         }
 280         /* If the parameter is from icmp6, decode it. */
 281         if (d != NULL) {
 282                 ip6cp = (struct ip6ctlparam *)d;
 283         } else {
 284                 ip6cp = (struct ip6ctlparam *)NULL;
 285         }
 286
 287         if (ip6cp != NULL) {
 288                 /*
 289                  * XXX: We assume that when IPV6 is non NULL, M and OFF are
 290                  * valid.
 291                  */
 292                 if (ip6cp->ip6c_m == NULL) {
 293                         return;
 294                 }
 295                 /*
 296                  * Check if we can safely examine the ports and the
 297                  * verification tag of the SCTP common header.
 298                  */
 299                 if (ip6cp->ip6c_m->m_pkthdr.len <
 300                     (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) {
 301                         return;
 302                 }
 303                 /* Copy out the port numbers and the verification tag. */
 304                 memset(&sh, 0, sizeof(sh));
 305                 m_copydata(ip6cp->ip6c_m,
 306                     ip6cp->ip6c_off,
 307                     sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t),
 308                     (caddr_t)&sh);
 309                 memset(&src, 0, sizeof(struct sockaddr_in6));
 310                 src.sin6_family = AF_INET6;
 311                 src.sin6_len = sizeof(struct sockaddr_in6);
 312                 src.sin6_port = sh.src_port;
 313                 src.sin6_addr = ip6cp->ip6c_ip6->ip6_src;
 314                 if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
 315                         return;
 316                 }
 317                 memset(&dst, 0, sizeof(struct sockaddr_in6));
 318                 dst.sin6_family = AF_INET6;
 319                 dst.sin6_len = sizeof(struct sockaddr_in6);
 320                 dst.sin6_port = sh.dest_port;
 321                 dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst;
 322                 if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) {
 323                         return;
 324                 }
 325                 inp = NULL;
 326                 net = NULL;
 327                 stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst,
 328                     (struct sockaddr *)&src,
 329                     &inp, &net, 1, SCTP_DEFAULT_VRFID);
 330                 if ((stcb != NULL) &&
 331                     (net != NULL) &&
 332                     (inp != NULL)) {
 333                         /* Check the verification tag */
 334                         if (ntohl(sh.v_tag) != 0) {
 335                                 /*
 336                                  * This must be the verification tag used
 337                                  * for sending out packets. We don't
 338                                  * consider packets reflecting the
 339                                  * verification tag.
 340                                  */
 341                                 if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) {
 342                                         SCTP_TCB_UNLOCK(stcb);
 343                                         return;
 344                                 }
 345                         } else {
 346                                 if (ip6cp->ip6c_m->m_pkthdr.len >=
 347                                     ip6cp->ip6c_off + sizeof(struct sctphdr) +
 348                                     sizeof(struct sctp_chunkhdr) +
 349                                     offsetof(struct sctp_init, a_rwnd)) {
 350                                         /*
 351                                          * In this case we can check if we
 352                                          * got an INIT chunk and if the
 353                                          * initiate tag matches.
 354                                          */
 355                                         uint32_t initiate_tag;
 356                                         uint8_t chunk_type;
 357
 358                                         m_copydata(ip6cp->ip6c_m,
 359                                             ip6cp->ip6c_off +
 360                                             sizeof(struct sctphdr),
 361                                             sizeof(uint8_t),
 362                                             (caddr_t)&chunk_type);
 363                                         m_copydata(ip6cp->ip6c_m,
 364                                             ip6cp->ip6c_off +
 365                                             sizeof(struct sctphdr) +
 366                                             sizeof(struct sctp_chunkhdr),
 367                                             sizeof(uint32_t),
 368                                             (caddr_t)&initiate_tag);
 369                                         if ((chunk_type != SCTP_INITIATION) ||
 370                                             (ntohl(initiate_tag) != stcb->asoc.my_vtag)) {
 371                                                 SCTP_TCB_UNLOCK(stcb);
 372                                                 return;
 373                                         }
 374                                 } else {
 375                                         SCTP_TCB_UNLOCK(stcb);
 376                                         return;
 377                                 }
 378                         }
 379                         sctp6_notify(inp, stcb, net,
 380                             ip6cp->ip6c_icmp6->icmp6_type,
 381                             ip6cp->ip6c_icmp6->icmp6_code,
 382                             ntohl(ip6cp->ip6c_icmp6->icmp6_mtu));
 383                 } else {
 384                         if ((stcb == NULL) && (inp != NULL)) {
 385                                 /* reduce inp's ref-count */
 386                                 SCTP_INP_WLOCK(inp);
 387                                 SCTP_INP_DECR_REF(inp);
 388                                 SCTP_INP_WUNLOCK(inp);
 389                         }
 390                         if (stcb) {
 391                                 SCTP_TCB_UNLOCK(stcb);
 392                         }
 393                 }
 394         }
 395 }
 396
 397 /*
 398  * this routine can probably be collasped into the one in sctp_userreq.c
 399  * since they do the same thing and now we lookup with a sockaddr
 400  */
 401 static int
 402 sctp6_getcred(SYSCTL_HANDLER_ARGS)
 403 {
 404         struct xucred xuc;
 405         struct sockaddr_in6 addrs[2];
 406         struct sctp_inpcb *inp;
 407         struct sctp_nets *net;
 408         struct sctp_tcb *stcb;
 409         int error;
 410         uint32_t vrf_id;
 411
 412         vrf_id = SCTP_DEFAULT_VRFID;
 413
 414         error = priv_check(req->td, PRIV_NETINET_GETCRED);
 415         if (error)
 416                 return (error);
 417
 418         if (req->newlen != sizeof(addrs)) {
 419                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 420                 return (EINVAL);
 421         }
 422         if (req->oldlen != sizeof(struct ucred)) {
 423                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 424                 return (EINVAL);
 425         }
 426         error = SYSCTL_IN(req, addrs, sizeof(addrs));
 427         if (error)
 428                 return (error);
 429
 430         stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]),
 431             sin6tosa(&addrs[0]),
 432             &inp, &net, 1, vrf_id);
 433         if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
 434                 if ((inp != NULL) && (stcb == NULL)) {
 435                         /* reduce ref-count */
 436                         SCTP_INP_WLOCK(inp);
 437                         SCTP_INP_DECR_REF(inp);
 438                         goto cred_can_cont;
 439                 }
 440                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
 441                 error = ENOENT;
 442                 goto out;
 443         }
 444         SCTP_TCB_UNLOCK(stcb);
 445         /*
 446          * We use the write lock here, only since in the error leg we need
 447          * it. If we used RLOCK, then we would have to
 448          * wlock/decr/unlock/rlock. Which in theory could create a hole.
 449          * Better to use higher wlock.
 450          */
 451         SCTP_INP_WLOCK(inp);
 452 cred_can_cont:
 453         error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket);
 454         if (error) {
 455                 SCTP_INP_WUNLOCK(inp);
 456                 goto out;
 457         }
 458         cru2x(inp->sctp_socket->so_cred, &xuc);
 459         SCTP_INP_WUNLOCK(inp);
 460         error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred));
 461 out:
 462         return (error);
 463 }
 464
 465 SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE | CTLFLAG_RW,
 466     0, 0,
 467     sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
 468
 469
 470 /* This is the same as the sctp_abort() could be made common */
 471 static void
 472 sctp6_abort(struct socket *so)
 473 {
 474         struct sctp_inpcb *inp;
 475         uint32_t flags;
 476
 477         inp = (struct sctp_inpcb *)so->so_pcb;
 478         if (inp == NULL) {
 479                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 480                 return;
 481         }
 482 sctp_must_try_again:
 483         flags = inp->sctp_flags;
 484 #ifdef SCTP_LOG_CLOSING
 485         sctp_log_closing(inp, NULL, 17);
 486 #endif
 487         if (((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) &&
 488             (atomic_cmpset_int(&inp->sctp_flags, flags, (flags | SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_CLOSE_IP)))) {
 489 #ifdef SCTP_LOG_CLOSING
 490                 sctp_log_closing(inp, NULL, 16);
 491 #endif
 492                 sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
 493                     SCTP_CALLED_AFTER_CMPSET_OFCLOSE);
 494                 SOCK_LOCK(so);
 495                 SCTP_SB_CLEAR(so->so_snd);
 496                 /*
 497                  * same for the rcv ones, they are only here for the
 498                  * accounting/select.
 499                  */
 500                 SCTP_SB_CLEAR(so->so_rcv);
 501                 /* Now null out the reference, we are completely detached. */
 502                 so->so_pcb = NULL;
 503                 SOCK_UNLOCK(so);
 504         } else {
 505                 flags = inp->sctp_flags;
 506                 if ((flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
 507                         goto sctp_must_try_again;
 508                 }
 509         }
 510         return;
 511 }
 512
 513 static int
 514 sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED)
 515 {
 516         struct in6pcb *inp6;
 517         int error;
 518         struct sctp_inpcb *inp;
 519         uint32_t vrf_id = SCTP_DEFAULT_VRFID;
 520
 521         inp = (struct sctp_inpcb *)so->so_pcb;
 522         if (inp != NULL) {
 523                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 524                 return (EINVAL);
 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         inp6 = (struct in6pcb *)inp;
 538
 539         inp6->inp_vflag |= INP_IPV6;
 540         inp6->in6p_hops = -1;   /* use kernel default */
 541         inp6->in6p_cksum = -1;  /* just to be sure */
 542 #ifdef INET
 543         /*
 544          * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6
 545          * socket as well, because the socket may be bound to an IPv6
 546          * wildcard address, which may match an IPv4-mapped IPv6 address.
 547          */
 548         inp6->inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
 549 #endif
 550         SCTP_INP_WUNLOCK(inp);
 551         return (0);
 552 }
 553
 554 static int
 555 sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
 556 {
 557         struct sctp_inpcb *inp;
 558         struct in6pcb *inp6;
 559         int error;
 560         u_char vflagsav;
 561
 562         inp = (struct sctp_inpcb *)so->so_pcb;
 563         if (inp == NULL) {
 564                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 565                 return (EINVAL);
 566         }
 567         if (addr) {
 568                 switch (addr->sa_family) {
 569 #ifdef INET
 570                 case AF_INET:
 571                         if (addr->sa_len != sizeof(struct sockaddr_in)) {
 572                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 573                                 return (EINVAL);
 574                         }
 575                         break;
 576 #endif
 577 #ifdef INET6
 578                 case AF_INET6:
 579                         if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 580                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 581                                 return (EINVAL);
 582                         }
 583                         break;
 584 #endif
 585                 default:
 586                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 587                         return (EINVAL);
 588                 }
 589         }
 590         inp6 = (struct in6pcb *)inp;
 591         vflagsav = inp6->inp_vflag;
 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                                         goto out;
 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                         error = EINVAL;
 639                         goto out;
 640                 }
 641 #endif
 642                 sin6_p = (struct sockaddr_in6 *)addr;
 643
 644                 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
 645                         /* can't bind v4-mapped addrs either! */
 646                         /* NOTE: we don't support SIIT */
 647                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 648                         error = EINVAL;
 649                         goto out;
 650                 }
 651         }
 652         error = sctp_inpcb_bind(so, addr, NULL, p);
 653 out:
 654         if (error != 0)
 655                 inp6->inp_vflag = vflagsav;
 656         return (error);
 657 }
 658
 659
 660 static void
 661 sctp6_close(struct socket *so)
 662 {
 663         sctp_close(so);
 664 }
 665
 666 /* This could be made common with sctp_detach() since they are identical */
 667
 668 static
 669 int
 670 sctp6_disconnect(struct socket *so)
 671 {
 672         return (sctp_disconnect(so));
 673 }
 674
 675
 676 int
 677 sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
 678     struct mbuf *control, struct thread *p);
 679
 680
 681 static int
 682 sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
 683     struct mbuf *control, struct thread *p)
 684 {
 685         struct sctp_inpcb *inp;
 686         struct in6pcb *inp6;
 687
 688 #ifdef INET
 689         struct sockaddr_in6 *sin6;
 690 #endif                          /* INET */
 691         /* No SPL needed since sctp_output does this */
 692
 693         inp = (struct sctp_inpcb *)so->so_pcb;
 694         if (inp == NULL) {
 695                 if (control) {
 696                         SCTP_RELEASE_PKT(control);
 697                         control = NULL;
 698                 }
 699                 SCTP_RELEASE_PKT(m);
 700                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 701                 return (EINVAL);
 702         }
 703         inp6 = (struct in6pcb *)inp;
 704         /*
 705          * For the TCP model we may get a NULL addr, if we are a connected
 706          * socket thats ok.
 707          */
 708         if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
 709             (addr == NULL)) {
 710                 goto connected_type;
 711         }
 712         if (addr == NULL) {
 713                 SCTP_RELEASE_PKT(m);
 714                 if (control) {
 715                         SCTP_RELEASE_PKT(control);
 716                         control = NULL;
 717                 }
 718                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ);
 719                 return (EDESTADDRREQ);
 720         }
 721 #ifdef INET
 722         sin6 = (struct sockaddr_in6 *)addr;
 723         if (SCTP_IPV6_V6ONLY(inp6)) {
 724                 /*
 725                  * if IPV6_V6ONLY flag, we discard datagrams destined to a
 726                  * v4 addr or v4-mapped addr
 727                  */
 728                 if (addr->sa_family == AF_INET) {
 729                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 730                         return (EINVAL);
 731                 }
 732                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 733                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 734                         return (EINVAL);
 735                 }
 736         }
 737         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 738                 struct sockaddr_in sin;
 739
 740                 /* convert v4-mapped into v4 addr and send */
 741                 in6_sin6_2_sin(&sin, sin6);
 742                 return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p));
 743         }
 744 #endif                          /* INET */
 745 connected_type:
 746         /* now what about control */
 747         if (control) {
 748                 if (inp->control) {
 749                         SCTP_PRINTF("huh? control set?\n");
 750                         SCTP_RELEASE_PKT(inp->control);
 751                         inp->control = NULL;
 752                 }
 753                 inp->control = control;
 754         }
 755         /* Place the data */
 756         if (inp->pkt) {
 757                 SCTP_BUF_NEXT(inp->pkt_last) = m;
 758                 inp->pkt_last = m;
 759         } else {
 760                 inp->pkt_last = inp->pkt = m;
 761         }
 762         if (
 763         /* FreeBSD and MacOSX uses a flag passed */
 764             ((flags & PRUS_MORETOCOME) == 0)
 765             ) {
 766                 /*
 767                  * note with the current version this code will only be used
 768                  * by OpenBSD, NetBSD and FreeBSD have methods for
 769                  * re-defining sosend() to use sctp_sosend().  One can
 770                  * optionaly switch back to this code (by changing back the
 771                  * defininitions but this is not advisable.
 772                  */
 773                 int ret;
 774
 775                 ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags);
 776                 inp->pkt = NULL;
 777                 inp->control = NULL;
 778                 return (ret);
 779         } else {
 780                 return (0);
 781         }
 782 }
 783
 784 static int
 785 sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p)
 786 {
 787         uint32_t vrf_id;
 788         int error = 0;
 789         struct sctp_inpcb *inp;
 790         struct sctp_tcb *stcb;
 791 #ifdef INET
 792         struct in6pcb *inp6;
 793         struct sockaddr_in6 *sin6;
 794         union sctp_sockstore store;
 795 #endif
 796
 797 #ifdef INET
 798         inp6 = (struct in6pcb *)so->so_pcb;
 799 #endif
 800         inp = (struct sctp_inpcb *)so->so_pcb;
 801         if (inp == NULL) {
 802                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
 803                 return (ECONNRESET);    /* I made the same as TCP since we are
 804                                          * not setup? */
 805         }
 806         if (addr == NULL) {
 807                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 808                 return (EINVAL);
 809         }
 810         switch (addr->sa_family) {
 811 #ifdef INET
 812         case AF_INET:
 813                 if (addr->sa_len != sizeof(struct sockaddr_in)) {
 814                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 815                         return (EINVAL);
 816                 }
 817                 break;
 818 #endif
 819 #ifdef INET6
 820         case AF_INET6:
 821                 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
 822                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 823                         return (EINVAL);
 824                 }
 825                 break;
 826 #endif
 827         default:
 828                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 829                 return (EINVAL);
 830         }
 831
 832         vrf_id = inp->def_vrf_id;
 833         SCTP_ASOC_CREATE_LOCK(inp);
 834         SCTP_INP_RLOCK(inp);
 835         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
 836             SCTP_PCB_FLAGS_UNBOUND) {
 837                 /* Bind a ephemeral port */
 838                 SCTP_INP_RUNLOCK(inp);
 839                 error = sctp6_bind(so, NULL, p);
 840                 if (error) {
 841                         SCTP_ASOC_CREATE_UNLOCK(inp);
 842
 843                         return (error);
 844                 }
 845                 SCTP_INP_RLOCK(inp);
 846         }
 847         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
 848             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
 849                 /* We are already connected AND the TCP model */
 850                 SCTP_INP_RUNLOCK(inp);
 851                 SCTP_ASOC_CREATE_UNLOCK(inp);
 852                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE);
 853                 return (EADDRINUSE);
 854         }
 855 #ifdef INET
 856         sin6 = (struct sockaddr_in6 *)addr;
 857         if (SCTP_IPV6_V6ONLY(inp6)) {
 858                 /*
 859                  * if IPV6_V6ONLY flag, ignore connections destined to a v4
 860                  * addr or v4-mapped addr
 861                  */
 862                 if (addr->sa_family == AF_INET) {
 863                         SCTP_INP_RUNLOCK(inp);
 864                         SCTP_ASOC_CREATE_UNLOCK(inp);
 865                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 866                         return (EINVAL);
 867                 }
 868                 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 869                         SCTP_INP_RUNLOCK(inp);
 870                         SCTP_ASOC_CREATE_UNLOCK(inp);
 871                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
 872                         return (EINVAL);
 873                 }
 874         }
 875         if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
 876                 /* convert v4-mapped into v4 addr */
 877                 in6_sin6_2_sin(&store.sin, sin6);
 878                 addr = &store.sa;
 879         }
 880 #endif                          /* INET */
 881         /* Now do we connect? */
 882         if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 883                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 884                 if (stcb) {
 885                         SCTP_TCB_LOCK(stcb);
 886                 }
 887                 SCTP_INP_RUNLOCK(inp);
 888         } else {
 889                 SCTP_INP_RUNLOCK(inp);
 890                 SCTP_INP_WLOCK(inp);
 891                 SCTP_INP_INCR_REF(inp);
 892                 SCTP_INP_WUNLOCK(inp);
 893                 stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL);
 894                 if (stcb == NULL) {
 895                         SCTP_INP_WLOCK(inp);
 896                         SCTP_INP_DECR_REF(inp);
 897                         SCTP_INP_WUNLOCK(inp);
 898                 }
 899         }
 900
 901         if (stcb != NULL) {
 902                 /* Already have or am bring up an association */
 903                 SCTP_ASOC_CREATE_UNLOCK(inp);
 904                 SCTP_TCB_UNLOCK(stcb);
 905                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY);
 906                 return (EALREADY);
 907         }
 908         /* We are GOOD to go */
 909         stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
 910             inp->sctp_ep.pre_open_stream_count,
 911             inp->sctp_ep.port, p);
 912         SCTP_ASOC_CREATE_UNLOCK(inp);
 913         if (stcb == NULL) {
 914                 /* Gak! no memory */
 915                 return (error);
 916         }
 917         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 918                 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
 919                 /* Set the connected flag so we can queue data */
 920                 soisconnecting(so);
 921         }
 922         stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
 923         (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
 924
 925         /* initialize authentication parameters for the assoc */
 926         sctp_initialize_auth_params(inp, stcb);
 927
 928         sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
 929         SCTP_TCB_UNLOCK(stcb);
 930         return (error);
 931 }
 932
 933 static int
 934 sctp6_getaddr(struct socket *so, struct sockaddr **addr)
 935 {
 936         struct sockaddr_in6 *sin6;
 937         struct sctp_inpcb *inp;
 938         uint32_t vrf_id;
 939         struct sctp_ifa *sctp_ifa;
 940
 941         int error;
 942
 943         /*
 944          * Do the malloc first in case it blocks.
 945          */
 946         SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6));
 947         if (sin6 == NULL)
 948                 return (ENOMEM);
 949         sin6->sin6_family = AF_INET6;
 950         sin6->sin6_len = sizeof(*sin6);
 951
 952         inp = (struct sctp_inpcb *)so->so_pcb;
 953         if (inp == NULL) {
 954                 SCTP_FREE_SONAME(sin6);
 955                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
 956                 return (ECONNRESET);
 957         }
 958         SCTP_INP_RLOCK(inp);
 959         sin6->sin6_port = inp->sctp_lport;
 960         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 961                 /* For the bound all case you get back 0 */
 962                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
 963                         struct sctp_tcb *stcb;
 964                         struct sockaddr_in6 *sin_a6;
 965                         struct sctp_nets *net;
 966                         int fnd;
 967
 968                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 969                         if (stcb == NULL) {
 970                                 SCTP_INP_RUNLOCK(inp);
 971                                 SCTP_FREE_SONAME(sin6);
 972                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
 973                                 return (ENOENT);
 974                         }
 975                         fnd = 0;
 976                         sin_a6 = NULL;
 977                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 978                                 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 979                                 if (sin_a6 == NULL)
 980                                         /* this will make coverity happy */
 981                                         continue;
 982
 983                                 if (sin_a6->sin6_family == AF_INET6) {
 984                                         fnd = 1;
 985                                         break;
 986                                 }
 987                         }
 988                         if ((!fnd) || (sin_a6 == NULL)) {
 989                                 /* punt */
 990                                 SCTP_INP_RUNLOCK(inp);
 991                                 SCTP_FREE_SONAME(sin6);
 992                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
 993                                 return (ENOENT);
 994                         }
 995                         vrf_id = inp->def_vrf_id;
 996                         sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id);
 997                         if (sctp_ifa) {
 998                                 sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr;
 999                         }
1000                 } else {
1001                         /* For the bound all case you get back 0 */
1002                         memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
1003                 }
1004         } else {
1005                 /* Take the first IPv6 address in the list */
1006                 struct sctp_laddr *laddr;
1007                 int fnd = 0;
1008
1009                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1010                         if (laddr->ifa->address.sa.sa_family == AF_INET6) {
1011                                 struct sockaddr_in6 *sin_a;
1012
1013                                 sin_a = &laddr->ifa->address.sin6;
1014                                 sin6->sin6_addr = sin_a->sin6_addr;
1015                                 fnd = 1;
1016                                 break;
1017                         }
1018                 }
1019                 if (!fnd) {
1020                         SCTP_FREE_SONAME(sin6);
1021                         SCTP_INP_RUNLOCK(inp);
1022                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1023                         return (ENOENT);
1024                 }
1025         }
1026         SCTP_INP_RUNLOCK(inp);
1027         /* Scoping things for v6 */
1028         if ((error = sa6_recoverscope(sin6)) != 0) {
1029                 SCTP_FREE_SONAME(sin6);
1030                 return (error);
1031         }
1032         (*addr) = (struct sockaddr *)sin6;
1033         return (0);
1034 }
1035
1036 static int
1037 sctp6_peeraddr(struct socket *so, struct sockaddr **addr)
1038 {
1039         struct sockaddr_in6 *sin6;
1040         int fnd;
1041         struct sockaddr_in6 *sin_a6;
1042         struct sctp_inpcb *inp;
1043         struct sctp_tcb *stcb;
1044         struct sctp_nets *net;
1045         int error;
1046
1047         /* Do the malloc first in case it blocks. */
1048         SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1049         if (sin6 == NULL)
1050                 return (ENOMEM);
1051         sin6->sin6_family = AF_INET6;
1052         sin6->sin6_len = sizeof(*sin6);
1053
1054         inp = (struct sctp_inpcb *)so->so_pcb;
1055         if ((inp == NULL) ||
1056             ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
1057                 /* UDP type and listeners will drop out here */
1058                 SCTP_FREE_SONAME(sin6);
1059                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN);
1060                 return (ENOTCONN);
1061         }
1062         SCTP_INP_RLOCK(inp);
1063         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1064         if (stcb) {
1065                 SCTP_TCB_LOCK(stcb);
1066         }
1067         SCTP_INP_RUNLOCK(inp);
1068         if (stcb == NULL) {
1069                 SCTP_FREE_SONAME(sin6);
1070                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET);
1071                 return (ECONNRESET);
1072         }
1073         fnd = 0;
1074         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1075                 sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1076                 if (sin_a6->sin6_family == AF_INET6) {
1077                         fnd = 1;
1078                         sin6->sin6_port = stcb->rport;
1079                         sin6->sin6_addr = sin_a6->sin6_addr;
1080                         break;
1081                 }
1082         }
1083         SCTP_TCB_UNLOCK(stcb);
1084         if (!fnd) {
1085                 /* No IPv4 address */
1086                 SCTP_FREE_SONAME(sin6);
1087                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT);
1088                 return (ENOENT);
1089         }
1090         if ((error = sa6_recoverscope(sin6)) != 0) {
1091                 SCTP_FREE_SONAME(sin6);
1092                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error);
1093                 return (error);
1094         }
1095         *addr = (struct sockaddr *)sin6;
1096         return (0);
1097 }
1098
1099 static int
1100 sctp6_in6getaddr(struct socket *so, struct sockaddr **nam)
1101 {
1102         struct in6pcb *inp6 = sotoin6pcb(so);
1103         int error;
1104
1105         if (inp6 == NULL) {
1106                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1107                 return (EINVAL);
1108         }
1109         /* allow v6 addresses precedence */
1110         error = sctp6_getaddr(so, nam);
1111 #ifdef INET
1112         if (error) {
1113                 struct sockaddr_in6 *sin6;
1114
1115                 /* try v4 next if v6 failed */
1116                 error = sctp_ingetaddr(so, nam);
1117                 if (error) {
1118                         return (error);
1119                 }
1120                 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1121                 if (sin6 == NULL) {
1122                         SCTP_FREE_SONAME(*nam);
1123                         return (ENOMEM);
1124                 }
1125                 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1126                 SCTP_FREE_SONAME(*nam);
1127                 *nam = (struct sockaddr *)sin6;
1128         }
1129 #endif
1130         return (error);
1131 }
1132
1133
1134 static int
1135 sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam)
1136 {
1137         struct in6pcb *inp6 = sotoin6pcb(so);
1138         int error;
1139
1140         if (inp6 == NULL) {
1141                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL);
1142                 return (EINVAL);
1143         }
1144         /* allow v6 addresses precedence */
1145         error = sctp6_peeraddr(so, nam);
1146 #ifdef INET
1147         if (error) {
1148                 struct sockaddr_in6 *sin6;
1149
1150                 /* try v4 next if v6 failed */
1151                 error = sctp_peeraddr(so, nam);
1152                 if (error) {
1153                         return (error);
1154                 }
1155                 SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6);
1156                 if (sin6 == NULL) {
1157                         SCTP_FREE_SONAME(*nam);
1158                         return (ENOMEM);
1159                 }
1160                 in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6);
1161                 SCTP_FREE_SONAME(*nam);
1162                 *nam = (struct sockaddr *)sin6;
1163         }
1164 #endif
1165         return (error);
1166 }
1167
1168 struct pr_usrreqs sctp6_usrreqs = {
1169         .pru_abort = sctp6_abort,
1170         .pru_accept = sctp_accept,
1171         .pru_attach = sctp6_attach,
1172         .pru_bind = sctp6_bind,
1173         .pru_connect = sctp6_connect,
1174         .pru_control = in6_control,
1175         .pru_close = sctp6_close,
1176         .pru_detach = sctp6_close,
1177         .pru_sopoll = sopoll_generic,
1178         .pru_flush = sctp_flush,
1179         .pru_disconnect = sctp6_disconnect,
1180         .pru_listen = sctp_listen,
1181         .pru_peeraddr = sctp6_getpeeraddr,
1182         .pru_send = sctp6_send,
1183         .pru_shutdown = sctp_shutdown,
1184         .pru_sockaddr = sctp6_in6getaddr,
1185         .pru_sosend = sctp_sosend,
1186         .pru_soreceive = sctp_soreceive
1187 };
1188
1189 #endif