sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2007, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * a) Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  *
  10  * b) Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *   the documentation and/or other materials provided with the distribution.
  13  *
  14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28  * THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48
  49
  50 struct sctp_epinfo sctppcbinfo;
  51
  52 /* FIX: we don't handle multiple link local scopes */
  53 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  54 int
  55 SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
  56 {
  57         struct in6_addr tmp_a, tmp_b;
  58
  59         /* use a copy of a and b */
  60         tmp_a = *a;
  61         tmp_b = *b;
  62         in6_clearscope(&tmp_a);
  63         in6_clearscope(&tmp_b);
  64         return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
  65 }
  66
  67 void
  68 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  69 {
  70         /*
  71          * We really don't need to lock this, but I will just because it
  72          * does not hurt.
  73          */
  74         SCTP_INP_INFO_RLOCK();
  75         spcb->ep_count = sctppcbinfo.ipi_count_ep;
  76         spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
  77         spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
  78         spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
  79         spcb->chk_count = sctppcbinfo.ipi_count_chunk;
  80         spcb->readq_count = sctppcbinfo.ipi_count_readq;
  81         spcb->stream_oque = sctppcbinfo.ipi_count_strmoq;
  82         spcb->free_chunks = sctppcbinfo.ipi_free_chunks;
  83
  84         SCTP_INP_INFO_RUNLOCK();
  85 }
  86
  87 /*
  88  * Addresses are added to VRF's (Virtual Router's). For BSD we
  89  * have only the default VRF 0. We maintain a hash list of
  90  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  91  * these has a list of addresses. When we add a new address
  92  * to a VRF we lookup the ifn/ifn_index, if the ifn does
  93  * not exist we create it and add it to the list of IFN's
  94  * within the VRF. Once we have the sctp_ifn, we add the
  95  * address to the list. So we look something like:
  96  *
  97  * hash-vrf-table
  98  *   vrf-> ifn-> ifn -> ifn
  99  *   vrf    |
 100  *    ...   +--ifa-> ifa -> ifa
 101  *   vrf
 102  *
 103  * We keep these seperate lists since the SCTP subsystem will
 104  * point to these from its source address selection nets structure.
 105  * When an address is deleted it does not happen right away on
 106  * the SCTP side, it gets scheduled. What we do when a
 107  * delete happens is immediately remove the address from
 108  * the master list and decrement the refcount. As our
 109  * addip iterator works through and frees the src address
 110  * selection pointing to the sctp_ifa, eventually the refcount
 111  * will reach 0 and we will delete it. Note that it is assumed
 112  * that any locking on system level ifn/ifa is done at the
 113  * caller of these functions and these routines will only
 114  * lock the SCTP structures as they add or delete things.
 115  *
 116  * Other notes on VRF concepts.
 117  *  - An endpoint can be in multiple VRF's
 118  *  - An association lives within a VRF and only one VRF.
 119  *  - Any incoming packet we can deduce the VRF for by
 120  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 121  *  - Any downward send call or connect call must supply the
 122  *    VRF via ancillary data or via some sort of set default
 123  *    VRF socket option call (again for BSD no brainer since
 124  *    the VRF is always 0).
 125  *  - An endpoint may add multiple VRF's to it.
 126  *  - Listening sockets can accept associations in any
 127  *    of the VRF's they are in but the assoc will end up
 128  *    in only one VRF (gotten from the packet or connect/send).
 129  *
 130  */
 131
 132 struct sctp_vrf *
 133 sctp_allocate_vrf(int vrfid)
 134 {
 135         struct sctp_vrf *vrf = NULL;
 136         struct sctp_vrflist *bucket;
 137
 138         /* First allocate the VRF structure */
 139         vrf = sctp_find_vrf(vrfid);
 140         if (vrf) {
 141                 /* Already allocated */
 142                 return (vrf);
 143         }
 144         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 145             "SCTP_VRF");
 146         if (vrf == NULL) {
 147                 /* No memory */
 148 #ifdef INVARIANTS
 149                 panic("No memory for VRF:%d", vrfid);
 150 #endif
 151                 return (NULL);
 152         }
 153         /* setup the VRF */
 154         memset(vrf, 0, sizeof(struct sctp_vrf));
 155         vrf->vrf_id = vrfid;
 156         LIST_INIT(&vrf->ifnlist);
 157         vrf->total_ifa_count = 0;
 158         /* Init the HASH of addresses */
 159         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_HASH_SIZE,
 160             &vrf->vrf_hashmark);
 161         if (vrf->vrf_addr_hash == NULL) {
 162                 /* No memory */
 163 #ifdef INVARIANTS
 164                 panic("No memory for VRF:%d", vrfid);
 165 #endif
 166                 return (NULL);
 167         }
 168         /* Add it to the hash table */
 169         bucket = &sctppcbinfo.sctp_vrfhash[(vrfid & sctppcbinfo.hashvrfmark)];
 170         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 171         return (vrf);
 172 }
 173
 174
 175 struct sctp_ifn *
 176 sctp_find_ifn(struct sctp_vrf *vrf, void *ifn, uint32_t ifn_index)
 177 {
 178         struct sctp_ifn *sctp_ifnp;
 179
 180         /*
 181          * We assume the lock is held for the addresses if thats wrong
 182          * problems could occur :-)
 183          */
 184         LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
 185                 if (sctp_ifnp->ifn_index == ifn_index) {
 186                         return (sctp_ifnp);
 187                 }
 188                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 189                         return (sctp_ifnp);
 190                 }
 191         }
 192         return (NULL);
 193 }
 194
 195 struct sctp_vrf *
 196 sctp_find_vrf(uint32_t vrfid)
 197 {
 198         struct sctp_vrflist *bucket;
 199         struct sctp_vrf *liste;
 200
 201         bucket = &sctppcbinfo.sctp_vrfhash[(vrfid & sctppcbinfo.hashvrfmark)];
 202         LIST_FOREACH(liste, bucket, next_vrf) {
 203                 if (vrfid == liste->vrf_id) {
 204                         return (liste);
 205                 }
 206         }
 207         return (NULL);
 208 }
 209
 210
 211 void
 212 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 213 {
 214         int ret;
 215
 216         ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1);
 217         if (ret == 1) {
 218                 /* We zero'd the count */
 219 #ifdef INVARIANTS
 220                 if (sctp_ifap->in_ifa_list) {
 221                         panic("Attempt to free item in a list");
 222                 }
 223 #else
 224                 if (sctp_ifap->in_ifa_list) {
 225                         printf("in_ifa_list was not clear, fixing cnt\n");
 226                         atomic_add_int(&sctp_ifap->refcount, 1);
 227                         return;
 228                 }
 229 #endif
 230                 SCTP_FREE(sctp_ifap);
 231         }
 232 }
 233
 234 struct sctp_ifa *
 235 sctp_add_addr_to_vrf(uint32_t vrfid, void *ifn, uint32_t ifn_index,
 236     uint32_t ifn_type, const char *if_name,
 237     void *ifa, struct sockaddr *addr, uint32_t ifa_flags)
 238 {
 239         struct sctp_vrf *vrf;
 240         struct sctp_ifn *sctp_ifnp = NULL;
 241         struct sctp_ifa *sctp_ifap = NULL;
 242         struct sctp_ifalist *hash_head;
 243         uint32_t hash_of_addr;
 244
 245         /* How granular do we need the locks to be here? */
 246         SCTP_IPI_ADDR_LOCK();
 247         vrf = sctp_find_vrf(vrfid);
 248         if (vrf == NULL) {
 249                 vrf = sctp_allocate_vrf(vrfid);
 250                 if (vrf == NULL) {
 251                         SCTP_IPI_ADDR_UNLOCK();
 252                         return (NULL);
 253                 }
 254         }
 255         sctp_ifnp = sctp_find_ifn(vrf, ifn, ifn_index);
 256         if (sctp_ifnp == NULL) {
 257                 /*
 258                  * build one and add it, can't hold lock until after malloc
 259                  * done though.
 260                  */
 261                 SCTP_IPI_ADDR_UNLOCK();
 262                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), "SCTP_IFN");
 263                 if (sctp_ifnp == NULL) {
 264 #ifdef INVARIANTS
 265                         panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
 266 #endif
 267                         return (NULL);
 268                 }
 269                 sctp_ifnp->ifn_index = ifn_index;
 270                 sctp_ifnp->ifn_p = ifn;
 271                 sctp_ifnp->ifn_type = ifn_type;
 272                 sctp_ifnp->ifa_count = 0;
 273                 sctp_ifnp->refcount = 0;
 274                 sctp_ifnp->vrf = vrf;
 275                 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 276                 LIST_INIT(&sctp_ifnp->ifalist);
 277                 SCTP_IPI_ADDR_LOCK();
 278                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 279         }
 280         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
 281         if (sctp_ifap) {
 282                 /* Hmm, it already exists? */
 283                 if ((sctp_ifap->ifn_p) &&
 284                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 285                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 286                                 /* easy to solve, just switch back to active */
 287                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 288                                 sctp_ifap->ifn_p = sctp_ifnp;
 289                 exit_stage_left:
 290                                 SCTP_IPI_ADDR_UNLOCK();
 291                                 return (sctp_ifap);
 292                         } else {
 293                                 goto exit_stage_left;
 294                         }
 295                 } else {
 296                         if (sctp_ifap->ifn_p) {
 297                                 /*
 298                                  * The first IFN gets the address,
 299                                  * duplicates are ignored.
 300                                  */
 301                                 goto exit_stage_left;
 302                         } else {
 303                                 /* repair ifnp which was NULL ? */
 304                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 305                                 sctp_ifap->ifn_p = sctp_ifnp;
 306                                 atomic_add_int(&sctp_ifnp->refcount, 1);
 307                         }
 308                         goto exit_stage_left;
 309                 }
 310         }
 311         SCTP_IPI_ADDR_UNLOCK();
 312         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), "SCTP_IFA");
 313         if (sctp_ifap == NULL) {
 314 #ifdef INVARIANTS
 315                 panic("No memory for IFA");
 316 #endif
 317                 return (NULL);
 318         }
 319         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 320         sctp_ifap->ifn_p = sctp_ifnp;
 321         atomic_add_int(&sctp_ifnp->refcount, 1);
 322
 323         sctp_ifap->ifa = ifa;
 324         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 325         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 326         sctp_ifap->flags = ifa_flags;
 327         /* Set scope */
 328         if (sctp_ifap->address.sa.sa_family == AF_INET) {
 329                 struct sockaddr_in *sin;
 330
 331                 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 332                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 333                     (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 334                         sctp_ifap->src_is_loop = 1;
 335                 }
 336                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 337                         sctp_ifap->src_is_priv = 1;
 338                 }
 339         } else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
 340                 /* ok to use deprecated addresses? */
 341                 struct sockaddr_in6 *sin6;
 342
 343                 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 344                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 345                     (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 346                         sctp_ifap->src_is_loop = 1;
 347                 }
 348                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 349                         sctp_ifap->src_is_priv = 1;
 350                 }
 351         }
 352         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 353
 354         if ((sctp_ifap->src_is_priv == 0) &&
 355             (sctp_ifap->src_is_loop == 0)) {
 356                 sctp_ifap->src_is_glob = 1;
 357         }
 358         SCTP_IPI_ADDR_LOCK();
 359         hash_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_hashmark)];
 360         LIST_INSERT_HEAD(hash_head, sctp_ifap, next_bucket);
 361         sctp_ifap->refcount = 1;
 362         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 363         sctp_ifnp->ifa_count++;
 364         sctp_ifap->in_ifa_list = 1;
 365         vrf->total_ifa_count++;
 366         SCTP_IPI_ADDR_UNLOCK();
 367         return (sctp_ifap);
 368 }
 369
 370 struct sctp_ifa *
 371 sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr,
 372     uint32_t ifn_index)
 373 {
 374         struct sctp_vrf *vrf;
 375         struct sctp_ifa *sctp_ifap = NULL;
 376         struct sctp_ifn *sctp_ifnp = NULL;
 377
 378         SCTP_IPI_ADDR_LOCK();
 379
 380         vrf = sctp_find_vrf(vrfid);
 381         if (vrf == NULL) {
 382                 printf("Can't find vrfid:%d\n", vrfid);
 383                 goto out_now;
 384         }
 385         sctp_ifnp = sctp_find_ifn(vrf, (void *)NULL, ifn_index);
 386         if (sctp_ifnp == NULL) {
 387                 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
 388         } else {
 389                 sctp_ifap = sctp_find_ifa_in_ifn(sctp_ifnp, addr, 1);
 390         }
 391
 392         if (sctp_ifap) {
 393                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 394                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 395                 sctp_ifnp->ifa_count--;
 396                 vrf->total_ifa_count--;
 397                 LIST_REMOVE(sctp_ifap, next_bucket);
 398                 LIST_REMOVE(sctp_ifap, next_ifa);
 399                 sctp_ifap->in_ifa_list = 0;
 400                 atomic_add_int(&sctp_ifnp->refcount, -1);
 401         } else {
 402                 printf("Del Addr-ifn:%d Could not find address:",
 403                     ifn_index);
 404                 sctp_print_address(addr);
 405         }
 406 out_now:
 407         SCTP_IPI_ADDR_UNLOCK();
 408         return (sctp_ifap);
 409 }
 410
 411 /*
 412  * Notes on locks for FreeBSD 5 and up. All association lookups that have a
 413  * definte ep, the INP structure is assumed to be locked for reading. If we
 414  * need to go find the INP (ususally when a **inp is passed) then we must
 415  * lock the INFO structure first and if needed lock the INP too. Note that if
 416  * we lock it we must
 417  *
 418  */
 419
 420
 421 /*
 422  * Given a endpoint, look and find in its association list any association
 423  * with the "to" address given. This can be a "from" address, too, for
 424  * inbound packets. For outbound packets it is a true "to" address.
 425  */
 426
 427 static struct sctp_tcb *
 428 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 429     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 430 {
 431         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
 432
 433         /*
 434          * Note for this module care must be taken when observing what to is
 435          * for. In most of the rest of the code the TO field represents my
 436          * peer and the FROM field represents my address. For this module it
 437          * is reversed of that.
 438          */
 439         /*
 440          * If we support the TCP model, then we must now dig through to see
 441          * if we can find our endpoint in the list of tcp ep's.
 442          */
 443         uint16_t lport, rport;
 444         struct sctppcbhead *ephead;
 445         struct sctp_inpcb *inp;
 446         struct sctp_laddr *laddr;
 447         struct sctp_tcb *stcb;
 448         struct sctp_nets *net;
 449
 450         if ((to == NULL) || (from == NULL)) {
 451                 return (NULL);
 452         }
 453         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 454                 lport = ((struct sockaddr_in *)to)->sin_port;
 455                 rport = ((struct sockaddr_in *)from)->sin_port;
 456         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 457                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 458                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 459         } else {
 460                 return NULL;
 461         }
 462         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 463             (lport + rport), sctppcbinfo.hashtcpmark)];
 464         /*
 465          * Ok now for each of the guys in this bucket we must look and see:
 466          * - Does the remote port match. - Does there single association's
 467          * addresses match this address (to). If so we update p_ep to point
 468          * to this ep and return the tcb from it.
 469          */
 470         LIST_FOREACH(inp, ephead, sctp_hash) {
 471                 if (lport != inp->sctp_lport) {
 472                         continue;
 473                 }
 474                 SCTP_INP_RLOCK(inp);
 475                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 476                         SCTP_INP_RUNLOCK(inp);
 477                         continue;
 478                 }
 479                 if (inp->def_vrf_id == vrf_id) {
 480                         SCTP_INP_RUNLOCK(inp);
 481                         continue;
 482                 }
 483                 /* check to see if the ep has one of the addresses */
 484                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 485                         /* We are NOT bound all, so look further */
 486                         int match = 0;
 487
 488                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 489
 490                                 if (laddr->ifa == NULL) {
 491 #ifdef SCTP_DEBUG
 492                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 493                                                 printf("An ounce of prevention is worth a pound of cure\n");
 494                                         }
 495 #endif
 496                                         continue;
 497                                 }
 498                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 499 #ifdef SCTP_DEBUG
 500                                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
 501                                                 printf("ifa being deleted\n");
 502                                         }
 503 #endif
 504                                         continue;
 505                                 }
 506                                 if (laddr->ifa->address.sa.sa_family ==
 507                                     to->sa_family) {
 508                                         /* see if it matches */
 509                                         struct sockaddr_in *intf_addr, *sin;
 510
 511                                         intf_addr = &laddr->ifa->address.sin;
 512                                         sin = (struct sockaddr_in *)to;
 513                                         if (from->sa_family == AF_INET) {
 514                                                 if (sin->sin_addr.s_addr ==
 515                                                     intf_addr->sin_addr.s_addr) {
 516                                                         match = 1;
 517                                                         break;
 518                                                 }
 519                                         } else {
 520                                                 struct sockaddr_in6 *intf_addr6;
 521                                                 struct sockaddr_in6 *sin6;
 522
 523                                                 sin6 = (struct sockaddr_in6 *)
 524                                                     to;
 525                                                 intf_addr6 = &laddr->ifa->address.sin6;
 526
 527                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 528                                                     &intf_addr6->sin6_addr)) {
 529                                                         match = 1;
 530                                                         break;
 531                                                 }
 532                                         }
 533                                 }
 534                         }
 535                         if (match == 0) {
 536                                 /* This endpoint does not have this address */
 537                                 SCTP_INP_RUNLOCK(inp);
 538                                 continue;
 539                         }
 540                 }
 541                 /*
 542                  * Ok if we hit here the ep has the address, does it hold
 543                  * the tcb?
 544                  */
 545
 546                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 547                 if (stcb == NULL) {
 548                         SCTP_INP_RUNLOCK(inp);
 549                         continue;
 550                 }
 551                 SCTP_TCB_LOCK(stcb);
 552                 if (stcb->rport != rport) {
 553                         /* remote port does not match. */
 554                         SCTP_TCB_UNLOCK(stcb);
 555                         SCTP_INP_RUNLOCK(inp);
 556                         continue;
 557                 }
 558                 /* Does this TCB have a matching address? */
 559                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 560
 561                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 562                                 /* not the same family, can't be a match */
 563                                 continue;
 564                         }
 565                         if (from->sa_family == AF_INET) {
 566                                 struct sockaddr_in *sin, *rsin;
 567
 568                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 569                                 rsin = (struct sockaddr_in *)from;
 570                                 if (sin->sin_addr.s_addr ==
 571                                     rsin->sin_addr.s_addr) {
 572                                         /* found it */
 573                                         if (netp != NULL) {
 574                                                 *netp = net;
 575                                         }
 576                                         /* Update the endpoint pointer */
 577                                         *inp_p = inp;
 578                                         SCTP_INP_RUNLOCK(inp);
 579                                         return (stcb);
 580                                 }
 581                         } else {
 582                                 struct sockaddr_in6 *sin6, *rsin6;
 583
 584                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 585                                 rsin6 = (struct sockaddr_in6 *)from;
 586                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 587                                     &rsin6->sin6_addr)) {
 588                                         /* found it */
 589                                         if (netp != NULL) {
 590                                                 *netp = net;
 591                                         }
 592                                         /* Update the endpoint pointer */
 593                                         *inp_p = inp;
 594                                         SCTP_INP_RUNLOCK(inp);
 595                                         return (stcb);
 596                                 }
 597                         }
 598                 }
 599                 SCTP_TCB_UNLOCK(stcb);
 600                 SCTP_INP_RUNLOCK(inp);
 601         }
 602         return (NULL);
 603 }
 604
 605 /*
 606  * rules for use
 607  *
 608  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 609  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 610  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 611  * NULL.
 612  */
 613
 614 struct sctp_tcb *
 615 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 616     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 617 {
 618         struct sctpasochead *head;
 619         struct sctp_inpcb *inp;
 620         struct sctp_tcb *stcb = NULL;
 621         struct sctp_nets *net;
 622         uint16_t rport;
 623
 624         inp = *inp_p;
 625         if (remote->sa_family == AF_INET) {
 626                 rport = (((struct sockaddr_in *)remote)->sin_port);
 627         } else if (remote->sa_family == AF_INET6) {
 628                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 629         } else {
 630                 return (NULL);
 631         }
 632         if (locked_tcb) {
 633                 /*
 634                  * UN-lock so we can do proper locking here this occurs when
 635                  * called from load_addresses_from_init.
 636                  */
 637                 SCTP_TCB_UNLOCK(locked_tcb);
 638         }
 639         SCTP_INP_INFO_RLOCK();
 640         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 641                 /*-
 642                  * Now either this guy is our listener or it's the
 643                  * connector. If it is the one that issued the connect, then
 644                  * it's only chance is to be the first TCB in the list. If
 645                  * it is the acceptor, then do the special_lookup to hash
 646                  * and find the real inp.
 647                  */
 648                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
 649                         /* to is peer addr, from is my addr */
 650                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 651                             netp, inp->def_vrf_id);
 652                         if ((stcb != NULL) && (locked_tcb == NULL)) {
 653                                 /* we have a locked tcb, lower refcount */
 654                                 SCTP_INP_WLOCK(inp);
 655                                 SCTP_INP_DECR_REF(inp);
 656                                 SCTP_INP_WUNLOCK(inp);
 657                         }
 658                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
 659                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 660                                 SCTP_TCB_LOCK(locked_tcb);
 661                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 662                         }
 663                         SCTP_INP_INFO_RUNLOCK();
 664                         return (stcb);
 665                 } else {
 666                         SCTP_INP_WLOCK(inp);
 667                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 668                                 goto null_return;
 669                         }
 670                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 671                         if (stcb == NULL) {
 672                                 goto null_return;
 673                         }
 674                         SCTP_TCB_LOCK(stcb);
 675                         if (stcb->rport != rport) {
 676                                 /* remote port does not match. */
 677                                 SCTP_TCB_UNLOCK(stcb);
 678                                 goto null_return;
 679                         }
 680                         /* now look at the list of remote addresses */
 681                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 682 #ifdef INVARIANTS
 683                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 684                                         panic("Corrupt net list");
 685                                 }
 686 #endif
 687                                 if (net->ro._l_addr.sa.sa_family !=
 688                                     remote->sa_family) {
 689                                         /* not the same family */
 690                                         continue;
 691                                 }
 692                                 if (remote->sa_family == AF_INET) {
 693                                         struct sockaddr_in *sin, *rsin;
 694
 695                                         sin = (struct sockaddr_in *)
 696                                             &net->ro._l_addr;
 697                                         rsin = (struct sockaddr_in *)remote;
 698                                         if (sin->sin_addr.s_addr ==
 699                                             rsin->sin_addr.s_addr) {
 700                                                 /* found it */
 701                                                 if (netp != NULL) {
 702                                                         *netp = net;
 703                                                 }
 704                                                 if (locked_tcb == NULL) {
 705                                                         SCTP_INP_DECR_REF(inp);
 706                                                 } else if (locked_tcb != stcb) {
 707                                                         SCTP_TCB_LOCK(locked_tcb);
 708                                                 }
 709                                                 SCTP_INP_WUNLOCK(inp);
 710                                                 SCTP_INP_INFO_RUNLOCK();
 711                                                 return (stcb);
 712                                         }
 713                                 } else if (remote->sa_family == AF_INET6) {
 714                                         struct sockaddr_in6 *sin6, *rsin6;
 715
 716                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 717                                         rsin6 = (struct sockaddr_in6 *)remote;
 718                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 719                                             &rsin6->sin6_addr)) {
 720                                                 /* found it */
 721                                                 if (netp != NULL) {
 722                                                         *netp = net;
 723                                                 }
 724                                                 if (locked_tcb == NULL) {
 725                                                         SCTP_INP_DECR_REF(inp);
 726                                                 } else if (locked_tcb != stcb) {
 727                                                         SCTP_TCB_LOCK(locked_tcb);
 728                                                 }
 729                                                 SCTP_INP_WUNLOCK(inp);
 730                                                 SCTP_INP_INFO_RUNLOCK();
 731                                                 return (stcb);
 732                                         }
 733                                 }
 734                         }
 735                         SCTP_TCB_UNLOCK(stcb);
 736                 }
 737         } else {
 738                 SCTP_INP_WLOCK(inp);
 739                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 740                         goto null_return;
 741                 }
 742                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 743                     inp->sctp_hashmark)];
 744                 if (head == NULL) {
 745                         goto null_return;
 746                 }
 747                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 748                         if (stcb->rport != rport) {
 749                                 /* remote port does not match */
 750                                 continue;
 751                         }
 752                         /* now look at the list of remote addresses */
 753                         SCTP_TCB_LOCK(stcb);
 754                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 755 #ifdef INVARIANTS
 756                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 757                                         panic("Corrupt net list");
 758                                 }
 759 #endif
 760                                 if (net->ro._l_addr.sa.sa_family !=
 761                                     remote->sa_family) {
 762                                         /* not the same family */
 763                                         continue;
 764                                 }
 765                                 if (remote->sa_family == AF_INET) {
 766                                         struct sockaddr_in *sin, *rsin;
 767
 768                                         sin = (struct sockaddr_in *)
 769                                             &net->ro._l_addr;
 770                                         rsin = (struct sockaddr_in *)remote;
 771                                         if (sin->sin_addr.s_addr ==
 772                                             rsin->sin_addr.s_addr) {
 773                                                 /* found it */
 774                                                 if (netp != NULL) {
 775                                                         *netp = net;
 776                                                 }
 777                                                 if (locked_tcb == NULL) {
 778                                                         SCTP_INP_DECR_REF(inp);
 779                                                 } else if (locked_tcb != stcb) {
 780                                                         SCTP_TCB_LOCK(locked_tcb);
 781                                                 }
 782                                                 SCTP_INP_WUNLOCK(inp);
 783                                                 SCTP_INP_INFO_RUNLOCK();
 784                                                 return (stcb);
 785                                         }
 786                                 } else if (remote->sa_family == AF_INET6) {
 787                                         struct sockaddr_in6 *sin6, *rsin6;
 788
 789                                         sin6 = (struct sockaddr_in6 *)
 790                                             &net->ro._l_addr;
 791                                         rsin6 = (struct sockaddr_in6 *)remote;
 792                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 793                                             &rsin6->sin6_addr)) {
 794                                                 /* found it */
 795                                                 if (netp != NULL) {
 796                                                         *netp = net;
 797                                                 }
 798                                                 if (locked_tcb == NULL) {
 799                                                         SCTP_INP_DECR_REF(inp);
 800                                                 } else if (locked_tcb != stcb) {
 801                                                         SCTP_TCB_LOCK(locked_tcb);
 802                                                 }
 803                                                 SCTP_INP_WUNLOCK(inp);
 804                                                 SCTP_INP_INFO_RUNLOCK();
 805                                                 return (stcb);
 806                                         }
 807                                 }
 808                         }
 809                         SCTP_TCB_UNLOCK(stcb);
 810                 }
 811         }
 812 null_return:
 813         /* clean up for returning null */
 814         if (locked_tcb) {
 815                 SCTP_TCB_LOCK(locked_tcb);
 816         }
 817         SCTP_INP_WUNLOCK(inp);
 818         SCTP_INP_INFO_RUNLOCK();
 819         /* not found */
 820         return (NULL);
 821 }
 822
 823 /*
 824  * Find an association for a specific endpoint using the association id given
 825  * out in the COMM_UP notification
 826  */
 827
 828 struct sctp_tcb *
 829 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
 830 {
 831         /*
 832          * Use my the assoc_id to find a endpoint
 833          */
 834         struct sctpasochead *head;
 835         struct sctp_tcb *stcb;
 836         uint32_t id;
 837
 838         if (asoc_id == 0 || inp == NULL) {
 839                 return (NULL);
 840         }
 841         SCTP_INP_INFO_RLOCK();
 842         id = (uint32_t) asoc_id;
 843         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
 844             sctppcbinfo.hashasocmark)];
 845         if (head == NULL) {
 846                 /* invalid id TSNH */
 847                 SCTP_INP_INFO_RUNLOCK();
 848                 return (NULL);
 849         }
 850         LIST_FOREACH(stcb, head, sctp_asocs) {
 851                 SCTP_INP_RLOCK(stcb->sctp_ep);
 852                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 853                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 854                         SCTP_INP_INFO_RUNLOCK();
 855                         return (NULL);
 856                 }
 857                 if (stcb->asoc.assoc_id == id) {
 858                         /* candidate */
 859                         if (inp != stcb->sctp_ep) {
 860                                 /*
 861                                  * some other guy has the same id active (id
 862                                  * collision ??).
 863                                  */
 864                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 865                                 continue;
 866                         }
 867                         if (want_lock) {
 868                                 SCTP_TCB_LOCK(stcb);
 869                         }
 870                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 871                         SCTP_INP_INFO_RUNLOCK();
 872                         return (stcb);
 873                 }
 874                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 875         }
 876         /* Ok if we missed here, lets try the restart hash */
 877         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
 878         if (head == NULL) {
 879                 /* invalid id TSNH */
 880                 SCTP_INP_INFO_RUNLOCK();
 881                 return (NULL);
 882         }
 883         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
 884                 SCTP_INP_RLOCK(stcb->sctp_ep);
 885                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 886                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 887                         SCTP_INP_INFO_RUNLOCK();
 888                         return (NULL);
 889                 }
 890                 SCTP_TCB_LOCK(stcb);
 891                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 892                 if (stcb->asoc.assoc_id == id) {
 893                         /* candidate */
 894                         if (inp != stcb->sctp_ep) {
 895                                 /*
 896                                  * some other guy has the same id active (id
 897                                  * collision ??).
 898                                  */
 899                                 SCTP_TCB_UNLOCK(stcb);
 900                                 continue;
 901                         }
 902                         SCTP_INP_INFO_RUNLOCK();
 903                         return (stcb);
 904                 }
 905                 SCTP_TCB_UNLOCK(stcb);
 906         }
 907         SCTP_INP_INFO_RUNLOCK();
 908         return (NULL);
 909 }
 910
 911
 912 static struct sctp_inpcb *
 913 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
 914     uint16_t lport, uint32_t vrf_id)
 915 {
 916         struct sctp_inpcb *inp;
 917         struct sockaddr_in *sin;
 918         struct sockaddr_in6 *sin6;
 919         struct sctp_laddr *laddr;
 920         int fnd;
 921
 922         /*
 923          * Endpoing probe expects that the INP_INFO is locked.
 924          */
 925         if (nam->sa_family == AF_INET) {
 926                 sin = (struct sockaddr_in *)nam;
 927                 sin6 = NULL;
 928         } else if (nam->sa_family == AF_INET6) {
 929                 sin6 = (struct sockaddr_in6 *)nam;
 930                 sin = NULL;
 931         } else {
 932                 /* unsupported family */
 933                 return (NULL);
 934         }
 935         if (head == NULL)
 936                 return (NULL);
 937         LIST_FOREACH(inp, head, sctp_hash) {
 938                 SCTP_INP_RLOCK(inp);
 939                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 940                         SCTP_INP_RUNLOCK(inp);
 941                         continue;
 942                 }
 943                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
 944                     (inp->sctp_lport == lport)) {
 945                         /* got it */
 946                         if ((nam->sa_family == AF_INET) &&
 947                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
 948                             SCTP_IPV6_V6ONLY(inp)) {
 949                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
 950                                 SCTP_INP_RUNLOCK(inp);
 951                                 continue;
 952                         }
 953                         /* A V6 address and the endpoint is NOT bound V6 */
 954                         if (nam->sa_family == AF_INET6 &&
 955                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
 956                                 SCTP_INP_RUNLOCK(inp);
 957                                 continue;
 958                         }
 959                         /* does a VRF id match? */
 960                         fnd = 0;
 961                         if (inp->def_vrf_id == vrf_id)
 962                                 fnd = 1;
 963
 964                         SCTP_INP_RUNLOCK(inp);
 965                         if (!fnd)
 966                                 continue;
 967                         return (inp);
 968                 }
 969                 SCTP_INP_RUNLOCK(inp);
 970         }
 971
 972         if ((nam->sa_family == AF_INET) &&
 973             (sin->sin_addr.s_addr == INADDR_ANY)) {
 974                 /* Can't hunt for one that has no address specified */
 975                 return (NULL);
 976         } else if ((nam->sa_family == AF_INET6) &&
 977             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
 978                 /* Can't hunt for one that has no address specified */
 979                 return (NULL);
 980         }
 981         /*
 982          * ok, not bound to all so see if we can find a EP bound to this
 983          * address.
 984          */
 985         LIST_FOREACH(inp, head, sctp_hash) {
 986                 SCTP_INP_RLOCK(inp);
 987                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 988                         SCTP_INP_RUNLOCK(inp);
 989                         continue;
 990                 }
 991                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
 992                         SCTP_INP_RUNLOCK(inp);
 993                         continue;
 994                 }
 995                 /*
 996                  * Ok this could be a likely candidate, look at all of its
 997                  * addresses
 998                  */
 999                 if (inp->sctp_lport != lport) {
1000                         SCTP_INP_RUNLOCK(inp);
1001                         continue;
1002                 }
1003                 /* does a VRF id match? */
1004                 fnd = 0;
1005                 if (inp->def_vrf_id == vrf_id)
1006                         fnd = 1;
1007
1008                 if (!fnd) {
1009                         SCTP_INP_RUNLOCK(inp);
1010                         continue;
1011                 }
1012                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1013                         if (laddr->ifa == NULL) {
1014 #ifdef SCTP_DEBUG
1015                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1016                                         printf("An ounce of prevention is worth a pound of cure\n");
1017                                 }
1018 #endif
1019                                 continue;
1020                         }
1021 #ifdef SCTP_DEBUG
1022                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1023                                 printf("Ok laddr->ifa:%p is possible, ",
1024                                     laddr->ifa);
1025                         }
1026 #endif
1027                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1028 #ifdef SCTP_DEBUG
1029                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1030                                         printf("Huh IFA being deleted\n");
1031                                 }
1032 #endif
1033                                 continue;
1034                         }
1035                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1036                                 /* possible, see if it matches */
1037                                 struct sockaddr_in *intf_addr;
1038
1039                                 intf_addr = &laddr->ifa->address.sin;
1040                                 if (nam->sa_family == AF_INET) {
1041                                         if (sin->sin_addr.s_addr ==
1042                                             intf_addr->sin_addr.s_addr) {
1043                                                 SCTP_INP_RUNLOCK(inp);
1044                                                 return (inp);
1045                                         }
1046                                 } else if (nam->sa_family == AF_INET6) {
1047                                         struct sockaddr_in6 *intf_addr6;
1048
1049                                         intf_addr6 = &laddr->ifa->address.sin6;
1050                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1051                                             &intf_addr6->sin6_addr)) {
1052                                                 SCTP_INP_RUNLOCK(inp);
1053                                                 return (inp);
1054                                         }
1055                                 }
1056                         }
1057                 }
1058                 SCTP_INP_RUNLOCK(inp);
1059         }
1060         return (NULL);
1061 }
1062
1063
1064 struct sctp_inpcb *
1065 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, uint32_t vrf_id)
1066 {
1067         /*
1068          * First we check the hash table to see if someone has this port
1069          * bound with just the port.
1070          */
1071         struct sctp_inpcb *inp;
1072         struct sctppcbhead *head;
1073         struct sockaddr_in *sin;
1074         struct sockaddr_in6 *sin6;
1075         int lport;
1076
1077         if (nam->sa_family == AF_INET) {
1078                 sin = (struct sockaddr_in *)nam;
1079                 lport = ((struct sockaddr_in *)nam)->sin_port;
1080         } else if (nam->sa_family == AF_INET6) {
1081                 sin6 = (struct sockaddr_in6 *)nam;
1082                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1083         } else {
1084                 /* unsupported family */
1085                 return (NULL);
1086         }
1087         /*
1088          * I could cheat here and just cast to one of the types but we will
1089          * do it right. It also provides the check against an Unsupported
1090          * type too.
1091          */
1092         /* Find the head of the ALLADDR chain */
1093         if (have_lock == 0) {
1094                 SCTP_INP_INFO_RLOCK();
1095
1096         }
1097         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1098             sctppcbinfo.hashmark)];
1099         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1100
1101         /*
1102          * If the TCP model exists it could be that the main listening
1103          * endpoint is gone but there exists a connected socket for this guy
1104          * yet. If so we can return the first one that we find. This may NOT
1105          * be the correct one but the sctp_findassociation_ep_addr has
1106          * further code to look at all TCP models.
1107          */
1108         if (inp == NULL && find_tcp_pool) {
1109                 unsigned int i;
1110
1111                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1112                         /*
1113                          * This is real gross, but we do NOT have a remote
1114                          * port at this point depending on who is calling.
1115                          * We must therefore look for ANY one that matches
1116                          * our local port :/
1117                          */
1118                         head = &sctppcbinfo.sctp_tcpephash[i];
1119                         if (LIST_FIRST(head)) {
1120                                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1121                                 if (inp) {
1122                                         /* Found one */
1123                                         break;
1124                                 }
1125                         }
1126                 }
1127         }
1128         if (inp) {
1129                 SCTP_INP_INCR_REF(inp);
1130         }
1131         if (have_lock == 0) {
1132                 SCTP_INP_INFO_RUNLOCK();
1133         }
1134         return (inp);
1135 }
1136
1137 /*
1138  * Find an association for an endpoint with the pointer to whom you want to
1139  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1140  * need to change the *to to some other struct like a mbuf...
1141  */
1142 struct sctp_tcb *
1143 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1144     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, uint32_t vrf_id)
1145 {
1146         struct sctp_inpcb *inp;
1147         struct sctp_tcb *retval;
1148
1149         SCTP_INP_INFO_RLOCK();
1150         if (find_tcp_pool) {
1151                 if (inp_p != NULL) {
1152                         retval = sctp_tcb_special_locate(inp_p, from, to, netp, vrf_id);
1153                 } else {
1154                         retval = sctp_tcb_special_locate(&inp, from, to, netp, vrf_id);
1155                 }
1156                 if (retval != NULL) {
1157                         SCTP_INP_INFO_RUNLOCK();
1158                         return (retval);
1159                 }
1160         }
1161         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1162         if (inp_p != NULL) {
1163                 *inp_p = inp;
1164         }
1165         SCTP_INP_INFO_RUNLOCK();
1166
1167         if (inp == NULL) {
1168                 return (NULL);
1169         }
1170         /*
1171          * ok, we have an endpoint, now lets find the assoc for it (if any)
1172          * we now place the source address or from in the to of the find
1173          * endpoint call. Since in reality this chain is used from the
1174          * inbound packet side.
1175          */
1176         if (inp_p != NULL) {
1177                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL);
1178         } else {
1179                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, NULL);
1180         }
1181         return retval;
1182 }
1183
1184
1185 /*
1186  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1187  * find all addresses that the sender has specified in any address list. Each
1188  * address will be used to lookup the TCB and see if one exits.
1189  */
1190 static struct sctp_tcb *
1191 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1192     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1193     struct sockaddr *dest)
1194 {
1195         struct sockaddr_in sin4;
1196         struct sockaddr_in6 sin6;
1197         struct sctp_paramhdr *phdr, parm_buf;
1198         struct sctp_tcb *retval;
1199         uint32_t ptype, plen;
1200
1201         memset(&sin4, 0, sizeof(sin4));
1202         memset(&sin6, 0, sizeof(sin6));
1203         sin4.sin_len = sizeof(sin4);
1204         sin4.sin_family = AF_INET;
1205         sin4.sin_port = sh->src_port;
1206         sin6.sin6_len = sizeof(sin6);
1207         sin6.sin6_family = AF_INET6;
1208         sin6.sin6_port = sh->src_port;
1209
1210         retval = NULL;
1211         offset += sizeof(struct sctp_init_chunk);
1212
1213         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1214         while (phdr != NULL) {
1215                 /* now we must see if we want the parameter */
1216                 ptype = ntohs(phdr->param_type);
1217                 plen = ntohs(phdr->param_length);
1218                 if (plen == 0) {
1219                         break;
1220                 }
1221                 if (ptype == SCTP_IPV4_ADDRESS &&
1222                     plen == sizeof(struct sctp_ipv4addr_param)) {
1223                         /* Get the rest of the address */
1224                         struct sctp_ipv4addr_param ip4_parm, *p4;
1225
1226                         phdr = sctp_get_next_param(m, offset,
1227                             (struct sctp_paramhdr *)&ip4_parm, plen);
1228                         if (phdr == NULL) {
1229                                 return (NULL);
1230                         }
1231                         p4 = (struct sctp_ipv4addr_param *)phdr;
1232                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1233                         /* look it up */
1234                         retval = sctp_findassociation_ep_addr(inp_p,
1235                             (struct sockaddr *)&sin4, netp, dest, NULL);
1236                         if (retval != NULL) {
1237                                 return (retval);
1238                         }
1239                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1240                     plen == sizeof(struct sctp_ipv6addr_param)) {
1241                         /* Get the rest of the address */
1242                         struct sctp_ipv6addr_param ip6_parm, *p6;
1243
1244                         phdr = sctp_get_next_param(m, offset,
1245                             (struct sctp_paramhdr *)&ip6_parm, plen);
1246                         if (phdr == NULL) {
1247                                 return (NULL);
1248                         }
1249                         p6 = (struct sctp_ipv6addr_param *)phdr;
1250                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1251                         /* look it up */
1252                         retval = sctp_findassociation_ep_addr(inp_p,
1253                             (struct sockaddr *)&sin6, netp, dest, NULL);
1254                         if (retval != NULL) {
1255                                 return (retval);
1256                         }
1257                 }
1258                 offset += SCTP_SIZE32(plen);
1259                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1260                     sizeof(parm_buf));
1261         }
1262         return (NULL);
1263 }
1264
1265
1266 static struct sctp_tcb *
1267 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1268     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1269     uint16_t lport, int skip_src_check)
1270 {
1271         /*
1272          * Use my vtag to hash. If we find it we then verify the source addr
1273          * is in the assoc. If all goes well we save a bit on rec of a
1274          * packet.
1275          */
1276         struct sctpasochead *head;
1277         struct sctp_nets *net;
1278         struct sctp_tcb *stcb;
1279
1280         *netp = NULL;
1281         *inp_p = NULL;
1282         SCTP_INP_INFO_RLOCK();
1283         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1284             sctppcbinfo.hashasocmark)];
1285         if (head == NULL) {
1286                 /* invalid vtag */
1287                 SCTP_INP_INFO_RUNLOCK();
1288                 return (NULL);
1289         }
1290         LIST_FOREACH(stcb, head, sctp_asocs) {
1291                 SCTP_INP_RLOCK(stcb->sctp_ep);
1292                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1293                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1294                         SCTP_INP_INFO_RUNLOCK();
1295                         return (NULL);
1296                 }
1297                 SCTP_TCB_LOCK(stcb);
1298                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1299                 if (stcb->asoc.my_vtag == vtag) {
1300                         /* candidate */
1301                         if (stcb->rport != rport) {
1302                                 /*
1303                                  * we could remove this if vtags are unique
1304                                  * across the system.
1305                                  */
1306                                 SCTP_TCB_UNLOCK(stcb);
1307                                 continue;
1308                         }
1309                         if (stcb->sctp_ep->sctp_lport != lport) {
1310                                 /*
1311                                  * we could remove this if vtags are unique
1312                                  * across the system.
1313                                  */
1314                                 SCTP_TCB_UNLOCK(stcb);
1315                                 continue;
1316                         }
1317                         if (skip_src_check) {
1318                                 *netp = NULL;   /* unknown */
1319                                 *inp_p = stcb->sctp_ep;
1320                                 SCTP_INP_INFO_RUNLOCK();
1321                                 return (stcb);
1322                         }
1323                         net = sctp_findnet(stcb, from);
1324                         if (net) {
1325                                 /* yep its him. */
1326                                 *netp = net;
1327                                 SCTP_STAT_INCR(sctps_vtagexpress);
1328                                 *inp_p = stcb->sctp_ep;
1329                                 SCTP_INP_INFO_RUNLOCK();
1330                                 return (stcb);
1331                         } else {
1332                                 /*
1333                                  * not him, this should only happen in rare
1334                                  * cases so I peg it.
1335                                  */
1336                                 SCTP_STAT_INCR(sctps_vtagbogus);
1337                         }
1338                 }
1339                 SCTP_TCB_UNLOCK(stcb);
1340         }
1341         SCTP_INP_INFO_RUNLOCK();
1342         return (NULL);
1343 }
1344
1345 /*
1346  * Find an association with the pointer to the inbound IP packet. This can be
1347  * a IPv4 or IPv6 packet.
1348  */
1349 struct sctp_tcb *
1350 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1351     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1352     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1353 {
1354         int find_tcp_pool;
1355         struct ip *iph;
1356         struct sctp_tcb *retval;
1357         struct sockaddr_storage to_store, from_store;
1358         struct sockaddr *to = (struct sockaddr *)&to_store;
1359         struct sockaddr *from = (struct sockaddr *)&from_store;
1360         struct sctp_inpcb *inp;
1361
1362         iph = mtod(m, struct ip *);
1363         if (iph->ip_v == IPVERSION) {
1364                 /* its IPv4 */
1365                 struct sockaddr_in *from4;
1366
1367                 from4 = (struct sockaddr_in *)&from_store;
1368                 bzero(from4, sizeof(*from4));
1369                 from4->sin_family = AF_INET;
1370                 from4->sin_len = sizeof(struct sockaddr_in);
1371                 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1372                 from4->sin_port = sh->src_port;
1373         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1374                 /* its IPv6 */
1375                 struct ip6_hdr *ip6;
1376                 struct sockaddr_in6 *from6;
1377
1378                 ip6 = mtod(m, struct ip6_hdr *);
1379                 from6 = (struct sockaddr_in6 *)&from_store;
1380                 bzero(from6, sizeof(*from6));
1381                 from6->sin6_family = AF_INET6;
1382                 from6->sin6_len = sizeof(struct sockaddr_in6);
1383                 from6->sin6_addr = ip6->ip6_src;
1384                 from6->sin6_port = sh->src_port;
1385                 /* Get the scopes in properly to the sin6 addr's */
1386                 /* we probably don't need these operations */
1387                 (void)sa6_recoverscope(from6);
1388                 sa6_embedscope(from6, ip6_use_defzone);
1389         } else {
1390                 /* Currently not supported. */
1391                 return (NULL);
1392         }
1393         if (sh->v_tag) {
1394                 /* we only go down this path if vtag is non-zero */
1395                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1396                     inp_p, netp, sh->src_port, sh->dest_port, 0);
1397                 if (retval) {
1398                         return (retval);
1399                 }
1400         }
1401         if (iph->ip_v == IPVERSION) {
1402                 /* its IPv4 */
1403                 struct sockaddr_in *to4;
1404
1405                 to4 = (struct sockaddr_in *)&to_store;
1406                 bzero(to4, sizeof(*to4));
1407                 to4->sin_family = AF_INET;
1408                 to4->sin_len = sizeof(struct sockaddr_in);
1409                 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
1410                 to4->sin_port = sh->dest_port;
1411         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1412                 /* its IPv6 */
1413                 struct ip6_hdr *ip6;
1414                 struct sockaddr_in6 *to6;
1415
1416                 ip6 = mtod(m, struct ip6_hdr *);
1417                 to6 = (struct sockaddr_in6 *)&to_store;
1418                 bzero(to6, sizeof(*to6));
1419                 to6->sin6_family = AF_INET6;
1420                 to6->sin6_len = sizeof(struct sockaddr_in6);
1421                 to6->sin6_addr = ip6->ip6_dst;
1422                 to6->sin6_port = sh->dest_port;
1423                 /* Get the scopes in properly to the sin6 addr's */
1424                 /* we probably don't need these operations */
1425                 (void)sa6_recoverscope(to6);
1426                 sa6_embedscope(to6, ip6_use_defzone);
1427         }
1428         find_tcp_pool = 0;
1429         /*
1430          * FIX FIX?, I think we only need to look in the TCP pool if its an
1431          * INIT or COOKIE-ECHO, We really don't need to find it that way if
1432          * its a INIT-ACK or COOKIE_ACK since these in bot one-2-one and
1433          * one-2-N would be in the main pool anyway.
1434          */
1435         if ((ch->chunk_type != SCTP_INITIATION) &&
1436             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1437             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1438             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1439                 /* Other chunk types go to the tcp pool. */
1440                 find_tcp_pool = 1;
1441         }
1442         if (inp_p) {
1443                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1444                     find_tcp_pool, vrf_id);
1445                 inp = *inp_p;
1446         } else {
1447                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1448                     find_tcp_pool, vrf_id);
1449         }
1450 #ifdef SCTP_DEBUG
1451         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1452                 printf("retval:%p inp:%p\n", retval, inp);
1453         }
1454 #endif
1455         if (retval == NULL && inp) {
1456                 /* Found a EP but not this address */
1457                 if ((ch->chunk_type == SCTP_INITIATION) ||
1458                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1459                         /*
1460                          * special hook, we do NOT return linp or an
1461                          * association that is linked to an existing
1462                          * association that is under the TCP pool (i.e. no
1463                          * listener exists). The endpoint finding routine
1464                          * will always find a listner before examining the
1465                          * TCP pool.
1466                          */
1467                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1468                                 if (inp_p) {
1469                                         *inp_p = NULL;
1470                                 }
1471                                 return (NULL);
1472                         }
1473                         retval = sctp_findassociation_special_addr(m, iphlen,
1474                             offset, sh, &inp, netp, to);
1475                         if (inp_p != NULL) {
1476                                 *inp_p = inp;
1477                         }
1478                 }
1479         }
1480 #ifdef SCTP_DEBUG
1481         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1482                 printf("retval is %p\n", retval);
1483         }
1484 #endif
1485         return (retval);
1486 }
1487
1488 /*
1489  * lookup an association by an ASCONF lookup address.
1490  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
1491  */
1492 struct sctp_tcb *
1493 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
1494     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1495 {
1496         struct sctp_tcb *stcb;
1497         struct sockaddr_in *sin;
1498         struct sockaddr_in6 *sin6;
1499         struct sockaddr_storage local_store, remote_store;
1500         struct ip *iph;
1501         struct sctp_paramhdr parm_buf, *phdr;
1502         int ptype;
1503         int zero_address = 0;
1504
1505
1506         memset(&local_store, 0, sizeof(local_store));
1507         memset(&remote_store, 0, sizeof(remote_store));
1508
1509         /* First get the destination address setup too. */
1510         iph = mtod(m, struct ip *);
1511         if (iph->ip_v == IPVERSION) {
1512                 /* its IPv4 */
1513                 sin = (struct sockaddr_in *)&local_store;
1514                 sin->sin_family = AF_INET;
1515                 sin->sin_len = sizeof(*sin);
1516                 sin->sin_port = sh->dest_port;
1517                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
1518         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1519                 /* its IPv6 */
1520                 struct ip6_hdr *ip6;
1521
1522                 ip6 = mtod(m, struct ip6_hdr *);
1523                 sin6 = (struct sockaddr_in6 *)&local_store;
1524                 sin6->sin6_family = AF_INET6;
1525                 sin6->sin6_len = sizeof(*sin6);
1526                 sin6->sin6_port = sh->dest_port;
1527                 sin6->sin6_addr = ip6->ip6_dst;
1528         } else {
1529                 return NULL;
1530         }
1531
1532         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
1533             &parm_buf, sizeof(struct sctp_paramhdr));
1534         if (phdr == NULL) {
1535 #ifdef SCTP_DEBUG
1536                 if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
1537                         printf("findassociation_ep_asconf: failed to get asconf lookup addr\n");
1538                 }
1539 #endif                          /* SCTP_DEBUG */
1540                 return NULL;
1541         }
1542         ptype = (int)((uint32_t) ntohs(phdr->param_type));
1543         /* get the correlation address */
1544         if (ptype == SCTP_IPV6_ADDRESS) {
1545                 /* ipv6 address param */
1546                 struct sctp_ipv6addr_param *p6, p6_buf;
1547
1548                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
1549                         return NULL;
1550                 }
1551                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
1552                     offset + sizeof(struct sctp_asconf_chunk),
1553                     &p6_buf.ph, sizeof(*p6));
1554                 if (p6 == NULL) {
1555 #ifdef SCTP_DEBUG
1556                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
1557                                 printf("findassociation_ep_asconf: failed to get asconf v6 lookup addr\n");
1558                         }
1559 #endif                          /* SCTP_DEBUG */
1560                         return (NULL);
1561                 }
1562                 sin6 = (struct sockaddr_in6 *)&remote_store;
1563                 sin6->sin6_family = AF_INET6;
1564                 sin6->sin6_len = sizeof(*sin6);
1565                 sin6->sin6_port = sh->src_port;
1566                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
1567                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1568                         zero_address = 1;
1569         } else if (ptype == SCTP_IPV4_ADDRESS) {
1570                 /* ipv4 address param */
1571                 struct sctp_ipv4addr_param *p4, p4_buf;
1572
1573                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
1574                         return NULL;
1575                 }
1576                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
1577                     offset + sizeof(struct sctp_asconf_chunk),
1578                     &p4_buf.ph, sizeof(*p4));
1579                 if (p4 == NULL) {
1580 #ifdef SCTP_DEBUG
1581                         if (sctp_debug_on & SCTP_DEBUG_INPUT3) {
1582                                 printf("findassociation_ep_asconf: failed to get asconf v4 lookup addr\n");
1583                         }
1584 #endif                          /* SCTP_DEBUG */
1585                         return (NULL);
1586                 }
1587                 sin = (struct sockaddr_in *)&remote_store;
1588                 sin->sin_family = AF_INET;
1589                 sin->sin_len = sizeof(*sin);
1590                 sin->sin_port = sh->src_port;
1591                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
1592                 if (sin->sin_addr.s_addr == INADDR_ANY)
1593                         zero_address = 1;
1594         } else {
1595                 /* invalid address param type */
1596                 return NULL;
1597         }
1598
1599         if (zero_address) {
1600                 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
1601                     netp, sh->src_port, sh->dest_port, 1);
1602                 /*
1603                  * printf("findassociation_ep_asconf: zero lookup address
1604                  * finds stcb 0x%x\n", (uint32_t)stcb);
1605                  */
1606         } else {
1607                 stcb = sctp_findassociation_ep_addr(inp_p,
1608                     (struct sockaddr *)&remote_store, netp,
1609                     (struct sockaddr *)&local_store, NULL);
1610         }
1611         return (stcb);
1612 }
1613
1614
1615 /*
1616  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1617  * addresses. This way if we don't get a bind we by default pick a ephemeral
1618  * port with all addresses bound.
1619  */
1620 int
1621 sctp_inpcb_alloc(struct socket *so)
1622 {
1623         /*
1624          * we get called when a new endpoint starts up. We need to allocate
1625          * the sctp_inpcb structure from the zone and init it. Mark it as
1626          * unbound and find a port that we can use as an ephemeral with
1627          * INADDR_ANY. If the user binds later no problem we can then add in
1628          * the specific addresses. And setup the default parameters for the
1629          * EP.
1630          */
1631         int i, error;
1632         struct sctp_inpcb *inp;
1633
1634         struct sctp_pcb *m;
1635         struct timeval time;
1636         sctp_sharedkey_t *null_key;
1637
1638         error = 0;
1639
1640         SCTP_INP_INFO_WLOCK();
1641         inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb);
1642         if (inp == NULL) {
1643                 printf("Out of SCTP-INPCB structures - no resources\n");
1644                 SCTP_INP_INFO_WUNLOCK();
1645                 return (ENOBUFS);
1646         }
1647         /* zap it */
1648         bzero(inp, sizeof(*inp));
1649
1650         /* bump generations */
1651         /* setup socket pointers */
1652         inp->sctp_socket = so;
1653         inp->ip_inp.inp.inp_socket = so;
1654
1655         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
1656         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1657
1658 #ifdef IPSEC
1659         {
1660                 struct inpcbpolicy *pcb_sp = NULL;
1661
1662                 error = ipsec_init_pcbpolicy(so, &pcb_sp);
1663                 /* Arrange to share the policy */
1664                 inp->ip_inp.inp.inp_sp = pcb_sp;
1665                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1666         }
1667         if (error != 0) {
1668                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1669                 SCTP_INP_INFO_WUNLOCK();
1670                 return error;
1671         }
1672 #endif                          /* IPSEC */
1673         SCTP_INCR_EP_COUNT();
1674         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1675         SCTP_INP_INFO_WUNLOCK();
1676
1677         so->so_pcb = (caddr_t)inp;
1678
1679         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
1680             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
1681                 /* UDP style socket */
1682                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1683                     SCTP_PCB_FLAGS_UNBOUND);
1684                 sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1685                 /* Be sure it is NON-BLOCKING IO for UDP */
1686                 /* SCTP_SET_SO_NBIO(so); */
1687         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
1688                 /* TCP style socket */
1689                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1690                     SCTP_PCB_FLAGS_UNBOUND);
1691                 sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT);
1692                 /* Be sure we have blocking IO by default */
1693                 SCTP_CLEAR_SO_NBIO(so);
1694         } else {
1695                 /*
1696                  * unsupported socket type (RAW, etc)- in case we missed it
1697                  * in protosw
1698                  */
1699                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1700                 return (EOPNOTSUPP);
1701         }
1702         inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize,
1703             &inp->sctp_hashmark);
1704         if (inp->sctp_tcbhash == NULL) {
1705                 printf("Out of SCTP-INPCB->hashinit - no resources\n");
1706                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1707                 return (ENOBUFS);
1708         }
1709         inp->def_vrf_id = SCTP_DEFAULT_VRFID;
1710
1711         SCTP_INP_INFO_WLOCK();
1712         SCTP_INP_LOCK_INIT(inp);
1713         SCTP_INP_READ_INIT(inp);
1714         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1715         /* lock the new ep */
1716         SCTP_INP_WLOCK(inp);
1717
1718         /* add it to the info area */
1719         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1720         SCTP_INP_INFO_WUNLOCK();
1721
1722         TAILQ_INIT(&inp->read_queue);
1723         LIST_INIT(&inp->sctp_addr_list);
1724
1725         LIST_INIT(&inp->sctp_asoc_list);
1726
1727 #ifdef SCTP_TRACK_FREED_ASOCS
1728         /* TEMP CODE */
1729         LIST_INIT(&inp->sctp_asoc_free_list);
1730 #endif
1731         /* Init the timer structure for signature change */
1732         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
1733         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1734
1735         /* now init the actual endpoint default data */
1736         m = &inp->sctp_ep;
1737
1738         /* setup the base timeout information */
1739         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
1740         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
1741         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1742         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
1743         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1744         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1745         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1746         /* all max/min max are in ms */
1747         m->sctp_maxrto = sctp_rto_max_default;
1748         m->sctp_minrto = sctp_rto_min_default;
1749         m->initial_rto = sctp_rto_initial_default;
1750         m->initial_init_rto_max = sctp_init_rto_max_default;
1751         m->sctp_sack_freq = sctp_sack_freq_default;
1752
1753         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1754
1755         m->max_init_times = sctp_init_rtx_max_default;
1756         m->max_send_times = sctp_assoc_rtx_max_default;
1757         m->def_net_failure = sctp_path_rtx_max_default;
1758         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1759         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1760         m->max_burst = sctp_max_burst_default;
1761         /* number of streams to pre-open on a association */
1762         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1763
1764         /* Add adaptation cookie */
1765         m->adaptation_layer_indicator = 0x504C5253;
1766
1767         /* seed random number generator */
1768         m->random_counter = 1;
1769         m->store_at = SCTP_SIGNATURE_SIZE;
1770         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
1771         sctp_fill_random_store(m);
1772
1773         /* Minimum cookie size */
1774         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1775             sizeof(struct sctp_state_cookie);
1776         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1777
1778         /* Setup the initial secret */
1779         SCTP_GETTIME_TIMEVAL(&time);
1780         m->time_of_secret_change = time.tv_sec;
1781
1782         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1783                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1784         }
1785         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1786
1787         /* How long is a cookie good for ? */
1788         m->def_cookie_life = sctp_valid_cookie_life_default;
1789         /*
1790          * Initialize authentication parameters
1791          */
1792         m->local_hmacs = sctp_default_supported_hmaclist();
1793         m->local_auth_chunks = sctp_alloc_chunklist();
1794         sctp_auth_set_default_chunks(m->local_auth_chunks);
1795         LIST_INIT(&m->shared_keys);
1796         /* add default NULL key as key id 0 */
1797         null_key = sctp_alloc_sharedkey();
1798         sctp_insert_sharedkey(&m->shared_keys, null_key);
1799         SCTP_INP_WUNLOCK(inp);
1800 #ifdef SCTP_LOG_CLOSING
1801         sctp_log_closing(inp, NULL, 12);
1802 #endif
1803         return (error);
1804 }
1805
1806
1807 void
1808 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1809     struct sctp_tcb *stcb)
1810 {
1811         struct sctp_nets *net;
1812         uint16_t lport, rport;
1813         struct sctppcbhead *head;
1814         struct sctp_laddr *laddr, *oladdr;
1815
1816         SCTP_TCB_UNLOCK(stcb);
1817         SCTP_INP_INFO_WLOCK();
1818         SCTP_INP_WLOCK(old_inp);
1819         SCTP_INP_WLOCK(new_inp);
1820         SCTP_TCB_LOCK(stcb);
1821
1822         new_inp->sctp_ep.time_of_secret_change =
1823             old_inp->sctp_ep.time_of_secret_change;
1824         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1825             sizeof(old_inp->sctp_ep.secret_key));
1826         new_inp->sctp_ep.current_secret_number =
1827             old_inp->sctp_ep.current_secret_number;
1828         new_inp->sctp_ep.last_secret_number =
1829             old_inp->sctp_ep.last_secret_number;
1830         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1831
1832         /* make it so new data pours into the new socket */
1833         stcb->sctp_socket = new_inp->sctp_socket;
1834         stcb->sctp_ep = new_inp;
1835
1836         /* Copy the port across */
1837         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1838         rport = stcb->rport;
1839         /* Pull the tcb from the old association */
1840         LIST_REMOVE(stcb, sctp_tcbhash);
1841         LIST_REMOVE(stcb, sctp_tcblist);
1842
1843         /* Now insert the new_inp into the TCP connected hash */
1844         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1845             sctppcbinfo.hashtcpmark)];
1846
1847         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
1848         /* Its safe to access */
1849         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
1850
1851         /* Now move the tcb into the endpoint list */
1852         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
1853         /*
1854          * Question, do we even need to worry about the ep-hash since we
1855          * only have one connection? Probably not :> so lets get rid of it
1856          * and not suck up any kernel memory in that.
1857          */
1858
1859         /* Ok. Let's restart timer. */
1860         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1861                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
1862                     stcb, net);
1863         }
1864
1865         SCTP_INP_INFO_WUNLOCK();
1866         if (new_inp->sctp_tcbhash != NULL) {
1867                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
1868                 new_inp->sctp_tcbhash = NULL;
1869         }
1870         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1871                 /* Subset bound, so copy in the laddr list from the old_inp */
1872                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
1873                         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
1874                         if (laddr == NULL) {
1875                                 /*
1876                                  * Gak, what can we do? This assoc is really
1877                                  * HOSED. We probably should send an abort
1878                                  * here.
1879                                  */
1880 #ifdef SCTP_DEBUG
1881                                 if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1882                                         printf("Association hosed in TCP model, out of laddr memory\n");
1883                                 }
1884 #endif                          /* SCTP_DEBUG */
1885                                 continue;
1886                         }
1887                         SCTP_INCR_LADDR_COUNT();
1888                         bzero(laddr, sizeof(*laddr));
1889                         laddr->ifa = oladdr->ifa;
1890                         atomic_add_int(&laddr->ifa->refcount, 1);
1891                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
1892                             sctp_nxt_addr);
1893                         new_inp->laddr_count++;
1894                 }
1895         }
1896         /*
1897          * Now any running timers need to be adjusted since we really don't
1898          * care if they are running or not just blast in the new_inp into
1899          * all of them.
1900          */
1901
1902         stcb->asoc.hb_timer.ep = (void *)new_inp;
1903         stcb->asoc.dack_timer.ep = (void *)new_inp;
1904         stcb->asoc.asconf_timer.ep = (void *)new_inp;
1905         stcb->asoc.strreset_timer.ep = (void *)new_inp;
1906         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
1907         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
1908         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
1909         /* now what about the nets? */
1910         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1911                 net->pmtu_timer.ep = (void *)new_inp;
1912                 net->rxt_timer.ep = (void *)new_inp;
1913                 net->fr_timer.ep = (void *)new_inp;
1914         }
1915         SCTP_INP_WUNLOCK(new_inp);
1916         SCTP_INP_WUNLOCK(old_inp);
1917 }
1918
1919 static int
1920 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1921 {
1922         struct sctppcbhead *head;
1923         struct sctp_inpcb *t_inp;
1924         int fnd;
1925
1926         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1927             sctppcbinfo.hashmark)];
1928
1929         LIST_FOREACH(t_inp, head, sctp_hash) {
1930                 if (t_inp->sctp_lport != lport) {
1931                         continue;
1932                 }
1933                 /* is it in the VRF in question */
1934                 fnd = 0;
1935                 if (t_inp->def_vrf_id == vrf_id)
1936                         fnd = 1;
1937                 if (!fnd)
1938                         continue;
1939
1940                 /* This one is in use. */
1941                 /* check the v6/v4 binding issue */
1942                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1943                     SCTP_IPV6_V6ONLY(t_inp)) {
1944                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1945                                 /* collision in V6 space */
1946                                 return (1);
1947                         } else {
1948                                 /* inp is BOUND_V4 no conflict */
1949                                 continue;
1950                         }
1951                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1952                         /* t_inp is bound v4 and v6, conflict always */
1953                         return (1);
1954                 } else {
1955                         /* t_inp is bound only V4 */
1956                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1957                             SCTP_IPV6_V6ONLY(t_inp)) {
1958                                 /* no conflict */
1959                                 continue;
1960                         }
1961                         /* else fall through to conflict */
1962                 }
1963                 return (1);
1964         }
1965         return (0);
1966 }
1967
1968
1969
1970 int
1971 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p)
1972 {
1973         /* bind a ep to a socket address */
1974         struct sctppcbhead *head;
1975         struct sctp_inpcb *inp, *inp_tmp;
1976         struct inpcb *ip_inp;
1977         int bindall;
1978         uint16_t lport;
1979         int error;
1980         uint32_t vrf_id;
1981
1982         lport = 0;
1983         error = 0;
1984         bindall = 1;
1985         inp = (struct sctp_inpcb *)so->so_pcb;
1986         ip_inp = (struct inpcb *)so->so_pcb;
1987 #ifdef SCTP_DEBUG
1988         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
1989                 if (addr) {
1990                         printf("Bind called port:%d\n",
1991                             ntohs(((struct sockaddr_in *)addr)->sin_port));
1992                         printf("Addr :");
1993                         sctp_print_address(addr);
1994                 }
1995         }
1996 #endif                          /* SCTP_DEBUG */
1997         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
1998                 /* already did a bind, subsequent binds NOT allowed ! */
1999                 return (EINVAL);
2000         }
2001         if (addr != NULL) {
2002                 if (addr->sa_family == AF_INET) {
2003                         struct sockaddr_in *sin;
2004
2005                         /* IPV6_V6ONLY socket? */
2006                         if (SCTP_IPV6_V6ONLY(ip_inp)) {
2007                                 return (EINVAL);
2008                         }
2009                         if (addr->sa_len != sizeof(*sin))
2010                                 return (EINVAL);
2011
2012                         sin = (struct sockaddr_in *)addr;
2013                         lport = sin->sin_port;
2014
2015                         if (sin->sin_addr.s_addr != INADDR_ANY) {
2016                                 bindall = 0;
2017                         }
2018                 } else if (addr->sa_family == AF_INET6) {
2019                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2020                         struct sockaddr_in6 *sin6;
2021
2022                         sin6 = (struct sockaddr_in6 *)addr;
2023
2024                         if (addr->sa_len != sizeof(*sin6))
2025                                 return (EINVAL);
2026
2027                         lport = sin6->sin6_port;
2028                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2029                                 bindall = 0;
2030                                 /* KAME hack: embed scopeid */
2031                                 if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
2032                                         return (EINVAL);
2033                         }
2034                         /* this must be cleared for ifa_ifwithaddr() */
2035                         sin6->sin6_scope_id = 0;
2036                 } else {
2037                         return (EAFNOSUPPORT);
2038                 }
2039         }
2040         /*
2041          * Setup a vrf_id to be the default for the non-bind-all case.
2042          */
2043         vrf_id = inp->def_vrf_id;
2044
2045         SCTP_INP_INFO_WLOCK();
2046         SCTP_INP_WLOCK(inp);
2047         /* increase our count due to the unlock we do */
2048         SCTP_INP_INCR_REF(inp);
2049         if (lport) {
2050                 /*
2051                  * Did the caller specify a port? if so we must see if a ep
2052                  * already has this one bound.
2053                  */
2054                 /* got to be root to get at low ports */
2055                 if (ntohs(lport) < IPPORT_RESERVED) {
2056                         if (p && (error =
2057                             priv_check_cred(p->td_ucred,
2058                             PRIV_NETINET_RESERVEDPORT,
2059                             SUSER_ALLOWJAIL
2060                             )
2061                             )) {
2062                                 SCTP_INP_DECR_REF(inp);
2063                                 SCTP_INP_WUNLOCK(inp);
2064                                 SCTP_INP_INFO_WUNLOCK();
2065                                 return (error);
2066                         }
2067                 }
2068                 if (p == NULL) {
2069                         SCTP_INP_DECR_REF(inp);
2070                         SCTP_INP_WUNLOCK(inp);
2071                         SCTP_INP_INFO_WUNLOCK();
2072                         return (error);
2073                 }
2074                 SCTP_INP_WUNLOCK(inp);
2075                 if (bindall) {
2076                         vrf_id = inp->def_vrf_id;
2077                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2078                         if (inp_tmp != NULL) {
2079                                 /*
2080                                  * lock guy returned and lower count note
2081                                  * that we are not bound so inp_tmp should
2082                                  * NEVER be inp. And it is this inp
2083                                  * (inp_tmp) that gets the reference bump,
2084                                  * so we must lower it.
2085                                  */
2086                                 SCTP_INP_DECR_REF(inp_tmp);
2087                                 SCTP_INP_DECR_REF(inp);
2088                                 /* unlock info */
2089                                 SCTP_INP_INFO_WUNLOCK();
2090                                 return (EADDRNOTAVAIL);
2091                         }
2092                 } else {
2093                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2094                         if (inp_tmp != NULL) {
2095                                 /*
2096                                  * lock guy returned and lower count note
2097                                  * that we are not bound so inp_tmp should
2098                                  * NEVER be inp. And it is this inp
2099                                  * (inp_tmp) that gets the reference bump,
2100                                  * so we must lower it.
2101                                  */
2102                                 SCTP_INP_DECR_REF(inp_tmp);
2103                                 SCTP_INP_DECR_REF(inp);
2104                                 /* unlock info */
2105                                 SCTP_INP_INFO_WUNLOCK();
2106                                 return (EADDRNOTAVAIL);
2107                         }
2108                 }
2109                 SCTP_INP_WLOCK(inp);
2110                 if (bindall) {
2111                         /* verify that no lport is not used by a singleton */
2112                         if (sctp_isport_inuse(inp, lport, vrf_id)) {
2113                                 /* Sorry someone already has this one bound */
2114                                 SCTP_INP_DECR_REF(inp);
2115                                 SCTP_INP_WUNLOCK(inp);
2116                                 SCTP_INP_INFO_WUNLOCK();
2117                                 return (EADDRNOTAVAIL);
2118                         }
2119                 }
2120         } else {
2121                 /*
2122                  * get any port but lets make sure no one has any address
2123                  * with this port bound
2124                  */
2125
2126                 /*
2127                  * setup the inp to the top (I could use the union but this
2128                  * is just as easy
2129                  */
2130                 uint32_t port_guess;
2131                 uint16_t port_attempt;
2132                 int not_done = 1;
2133                 int not_found = 1;
2134
2135                 while (not_done) {
2136                         port_guess = sctp_select_initial_TSN(&inp->sctp_ep);
2137                         port_attempt = (port_guess & 0x0000ffff);
2138                         if (port_attempt == 0) {
2139                                 goto next_half;
2140                         }
2141                         if (port_attempt < IPPORT_RESERVED) {
2142                                 port_attempt += IPPORT_RESERVED;
2143                         }
2144                         vrf_id = inp->def_vrf_id;
2145                         if (sctp_isport_inuse(inp, htons(port_attempt), vrf_id) == 1) {
2146                                 /* got a port we can use */
2147                                 not_found = 0;
2148                                 break;
2149                         }
2150                         if (not_found == 1) {
2151                                 /* We can use this port */
2152                                 not_done = 0;
2153                                 continue;
2154                         }
2155                         /* try upper half */
2156         next_half:
2157                         port_attempt = ((port_guess >> 16) & 0x0000ffff);
2158                         if (port_attempt == 0) {
2159                                 goto last_try;
2160                         }
2161                         if (port_attempt < IPPORT_RESERVED) {
2162                                 port_attempt += IPPORT_RESERVED;
2163                         }
2164                         vrf_id = inp->def_vrf_id;
2165                         if (sctp_isport_inuse(inp, htons(port_attempt), vrf_id) == 1) {
2166                                 /* got a port we can use */
2167                                 not_found = 0;
2168                                 break;
2169                         }
2170                         if (not_found == 1) {
2171                                 /* We can use this port */
2172                                 not_done = 0;
2173                                 continue;
2174                         }
2175                         /* try two half's added together */
2176         last_try:
2177                         port_attempt = (((port_guess >> 16) & 0x0000ffff) +
2178                             (port_guess & 0x0000ffff));
2179                         if (port_attempt == 0) {
2180                                 /* get a new random number */
2181                                 continue;
2182                         }
2183                         if (port_attempt < IPPORT_RESERVED) {
2184                                 port_attempt += IPPORT_RESERVED;
2185                         }
2186                         vrf_id = inp->def_vrf_id;
2187                         if (sctp_isport_inuse(inp, htons(port_attempt), vrf_id) == 1) {
2188                                 /* got a port we can use */
2189                                 not_found = 0;
2190                                 break;
2191                         }
2192                         if (not_found == 1) {
2193                                 /* We can use this port */
2194                                 not_done = 0;
2195                                 continue;
2196                         }
2197                 }
2198                 /* we don't get out of the loop until we have a port */
2199                 lport = htons(port_attempt);
2200         }
2201         SCTP_INP_DECR_REF(inp);
2202         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2203             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2204                 /*
2205                  * this really should not happen. The guy did a non-blocking
2206                  * bind and then did a close at the same time.
2207                  */
2208                 SCTP_INP_WUNLOCK(inp);
2209                 SCTP_INP_INFO_WUNLOCK();
2210                 return (EINVAL);
2211         }
2212         /* ok we look clear to give out this port, so lets setup the binding */
2213         if (bindall) {
2214                 /* binding to all addresses, so just set in the proper flags */
2215                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2216                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2217                 /* set the automatic addr changes from kernel flag */
2218                 if (sctp_auto_asconf == 0) {
2219                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2220                 } else {
2221                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2222                 }
2223         } else {
2224                 /*
2225                  * bind specific, make sure flags is off and add a new
2226                  * address structure to the sctp_addr_list inside the ep
2227                  * structure.
2228                  *
2229                  * We will need to allocate one and insert it at the head. The
2230                  * socketopt call can just insert new addresses in there as
2231                  * well. It will also have to do the embed scope kame hack
2232                  * too (before adding).
2233                  */
2234                 struct sctp_ifa *ifa;
2235                 struct sockaddr_storage store_sa;
2236
2237                 memset(&store_sa, 0, sizeof(store_sa));
2238                 if (addr->sa_family == AF_INET) {
2239                         struct sockaddr_in *sin;
2240
2241                         sin = (struct sockaddr_in *)&store_sa;
2242                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2243                         sin->sin_port = 0;
2244                 } else if (addr->sa_family == AF_INET6) {
2245                         struct sockaddr_in6 *sin6;
2246
2247                         sin6 = (struct sockaddr_in6 *)&store_sa;
2248                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2249                         sin6->sin6_port = 0;
2250                 }
2251                 /*
2252                  * first find the interface with the bound address need to
2253                  * zero out the port to find the address! yuck! can't do
2254                  * this earlier since need port for sctp_pcb_findep()
2255                  */
2256                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, vrf_id, 0);
2257                 if (ifa == NULL) {
2258                         /* Can't find an interface with that address */
2259                         SCTP_INP_WUNLOCK(inp);
2260                         SCTP_INP_INFO_WUNLOCK();
2261                         return (EADDRNOTAVAIL);
2262                 }
2263                 if (addr->sa_family == AF_INET6) {
2264                         /* GAK, more FIXME IFA lock? */
2265                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2266                                 /* Can't bind a non-existent addr. */
2267                                 SCTP_INP_WUNLOCK(inp);
2268                                 SCTP_INP_INFO_WUNLOCK();
2269                                 return (EINVAL);
2270                         }
2271                 }
2272                 /* we're not bound all */
2273                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2274                 /* set the automatic addr changes from kernel flag */
2275                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2276                 if (sctp_auto_asconf == 0) {
2277                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2278                 } else {
2279                         /*
2280                          * allow bindx() to send ASCONF's for binding
2281                          * changes
2282                          */
2283                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2284                 }
2285
2286                 /* add this address to the endpoint list */
2287                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2288                 if (error != 0) {
2289                         SCTP_INP_WUNLOCK(inp);
2290                         SCTP_INP_INFO_WUNLOCK();
2291                         return (error);
2292                 }
2293                 inp->laddr_count++;
2294         }
2295         /* find the bucket */
2296         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2297             sctppcbinfo.hashmark)];
2298         /* put it in the bucket */
2299         LIST_INSERT_HEAD(head, inp, sctp_hash);
2300 #ifdef SCTP_DEBUG
2301         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2302                 printf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport));
2303         }
2304 #endif
2305         /* set in the port */
2306         inp->sctp_lport = lport;
2307
2308         /* turn off just the unbound flag */
2309         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2310         SCTP_INP_WUNLOCK(inp);
2311         SCTP_INP_INFO_WUNLOCK();
2312         return (0);
2313 }
2314
2315
2316 static void
2317 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2318 {
2319         struct sctp_iterator *it;
2320
2321         /*
2322          * We enter with the only the ITERATOR_LOCK in place and a write
2323          * lock on the inp_info stuff.
2324          */
2325
2326         /*
2327          * Go through all iterators, we must do this since it is possible
2328          * that some iterator does NOT have the lock, but is waiting for it.
2329          * And the one that had the lock has either moved in the last
2330          * iteration or we just cleared it above. We need to find all of
2331          * those guys. The list of iterators should never be very big
2332          * though.
2333          */
2334         TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2335                 if (it == inp->inp_starting_point_for_iterator)
2336                         /* skip this guy, he's special */
2337                         continue;
2338                 if (it->inp == inp) {
2339                         /*
2340                          * This is tricky and we DON'T lock the iterator.
2341                          * Reason is he's running but waiting for me since
2342                          * inp->inp_starting_point_for_iterator has the lock
2343                          * on me (the guy above we skipped). This tells us
2344                          * its is not running but waiting for
2345                          * inp->inp_starting_point_for_iterator to be
2346                          * released by the guy that does have our INP in a
2347                          * lock.
2348                          */
2349                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2350                                 it->inp = NULL;
2351                                 it->stcb = NULL;
2352                         } else {
2353                                 /* set him up to do the next guy not me */
2354                                 it->inp = inp_next;
2355                                 it->stcb = NULL;
2356                         }
2357                 }
2358         }
2359         it = inp->inp_starting_point_for_iterator;
2360         if (it) {
2361                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2362                         it->inp = NULL;
2363                 } else {
2364                         it->inp = inp_next;
2365                 }
2366                 it->stcb = NULL;
2367         }
2368 }
2369
2370 /* release sctp_inpcb unbind the port */
2371 void
2372 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2373 {
2374         /*
2375          * Here we free a endpoint. We must find it (if it is in the Hash
2376          * table) and remove it from there. Then we must also find it in the
2377          * overall list and remove it from there. After all removals are
2378          * complete then any timer has to be stopped. Then start the actual
2379          * freeing. a) Any local lists. b) Any associations. c) The hash of
2380          * all associations. d) finally the ep itself.
2381          */
2382         struct sctp_pcb *m;
2383         struct sctp_inpcb *inp_save;
2384         struct sctp_tcb *asoc, *nasoc;
2385         struct sctp_laddr *laddr, *nladdr;
2386         struct inpcb *ip_pcb;
2387         struct socket *so;
2388
2389         struct sctp_queued_to_read *sq;
2390
2391
2392         int cnt;
2393         sctp_sharedkey_t *shared_key;
2394
2395
2396 #ifdef SCTP_LOG_CLOSING
2397         sctp_log_closing(inp, NULL, 0);
2398 #endif
2399
2400         SCTP_ITERATOR_LOCK();
2401         so = inp->sctp_socket;
2402         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2403                 /* been here before.. eeks.. get out of here */
2404                 printf("This conflict in free SHOULD not be happening!\n");
2405                 SCTP_ITERATOR_UNLOCK();
2406 #ifdef SCTP_LOG_CLOSING
2407                 sctp_log_closing(inp, NULL, 1);
2408 #endif
2409                 return;
2410         }
2411         SCTP_ASOC_CREATE_LOCK(inp);
2412         SCTP_INP_INFO_WLOCK();
2413
2414         SCTP_INP_WLOCK(inp);
2415         /*
2416          * First time through we have the socket lock, after that no more.
2417          */
2418         if (from == 1) {
2419                 /*
2420                  * Once we are in we can remove the flag from = 1 is only
2421                  * passed from the actual closing routines that are called
2422                  * via the sockets layer.
2423                  */
2424                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2425         }
2426         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2427             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2428
2429         if (inp->control) {
2430                 sctp_m_freem(inp->control);
2431                 inp->control = NULL;
2432         }
2433         if (inp->pkt) {
2434                 sctp_m_freem(inp->pkt);
2435                 inp->pkt = NULL;
2436         }
2437         m = &inp->sctp_ep;
2438         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
2439                                          * here but I will be nice :> (i.e.
2440                                          * ip_pcb = ep;) */
2441         if (immediate == 0) {
2442                 int cnt_in_sd;
2443
2444                 cnt_in_sd = 0;
2445                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2446                     asoc = nasoc) {
2447                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2448                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2449                                 /* Skip guys being freed */
2450                                 asoc->sctp_socket = NULL;
2451                                 cnt_in_sd++;
2452                                 continue;
2453                         }
2454                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2455                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2456                                 /* Just abandon things in the front states */
2457                                 if (asoc->asoc.total_output_queue_size == 0) {
2458                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2);
2459                                         continue;
2460                                 }
2461                         }
2462                         SCTP_TCB_LOCK(asoc);
2463                         /* Disconnect the socket please */
2464                         asoc->sctp_socket = NULL;
2465                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2466                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
2467                             (asoc->asoc.control_pdapi) ||
2468                             (asoc->asoc.size_on_all_streams > 0) ||
2469                             (so && (so->so_rcv.sb_cc > 0))
2470                             ) {
2471                                 /* Left with Data unread */
2472                                 struct mbuf *op_err;
2473
2474                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2475                                     0, M_DONTWAIT, 1, MT_DATA);
2476                                 if (op_err) {
2477                                         /* Fill in the user initiated abort */
2478                                         struct sctp_paramhdr *ph;
2479                                         uint32_t *ippp;
2480
2481                                         SCTP_BUF_LEN(op_err) =
2482                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2483                                         ph = mtod(op_err,
2484                                             struct sctp_paramhdr *);
2485                                         ph->param_type = htons(
2486                                             SCTP_CAUSE_USER_INITIATED_ABT);
2487                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
2488                                         ippp = (uint32_t *) (ph + 1);
2489                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2490                                 }
2491                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2492                                 sctp_send_abort_tcb(asoc, op_err);
2493                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2494                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2495                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2496                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2497                                 }
2498                                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4);
2499                                 continue;
2500                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2501                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2502                                     (asoc->asoc.stream_queue_cnt == 0)
2503                             ) {
2504                                 if (asoc->asoc.locked_on_sending) {
2505                                         goto abort_anyway;
2506                                 }
2507                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2508                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2509                                         /*
2510                                          * there is nothing queued to send,
2511                                          * so I send shutdown
2512                                          */
2513                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2514                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2515                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2516                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2517                                         }
2518                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2519                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2520                                             asoc->asoc.primary_destination);
2521                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2522                                             asoc->asoc.primary_destination);
2523                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR);
2524                                 }
2525                         } else {
2526                                 /* mark into shutdown pending */
2527                                 struct sctp_stream_queue_pending *sp;
2528
2529                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2530                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2531                                     asoc->asoc.primary_destination);
2532                                 if (asoc->asoc.locked_on_sending) {
2533                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2534                                             sctp_streamhead);
2535                                         if (sp == NULL) {
2536                                                 printf("Error, sp is NULL, locked on sending is %p strm:%d\n",
2537                                                     asoc->asoc.locked_on_sending,
2538                                                     asoc->asoc.locked_on_sending->stream_no);
2539                                         } else {
2540                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2541                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2542                                         }
2543                                 }
2544                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2545                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2546                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2547                                         struct mbuf *op_err;
2548
2549                         abort_anyway:
2550                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2551                                             0, M_DONTWAIT, 1, MT_DATA);
2552                                         if (op_err) {
2553                                                 /*
2554                                                  * Fill in the user
2555                                                  * initiated abort
2556                                                  */
2557                                                 struct sctp_paramhdr *ph;
2558                                                 uint32_t *ippp;
2559
2560                                                 SCTP_BUF_LEN(op_err) =
2561                                                     (sizeof(struct sctp_paramhdr) +
2562                                                     sizeof(uint32_t));
2563                                                 ph = mtod(op_err,
2564                                                     struct sctp_paramhdr *);
2565                                                 ph->param_type = htons(
2566                                                     SCTP_CAUSE_USER_INITIATED_ABT);
2567                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2568                                                 ippp = (uint32_t *) (ph + 1);
2569                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
2570                                         }
2571                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
2572                                         sctp_send_abort_tcb(asoc, op_err);
2573                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2574                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2575                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2576                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2577                                         }
2578                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6);
2579                                         continue;
2580                                 }
2581                         }
2582                         cnt_in_sd++;
2583                         SCTP_TCB_UNLOCK(asoc);
2584                 }
2585                 /* now is there some left in our SHUTDOWN state? */
2586                 if (cnt_in_sd) {
2587                         SCTP_INP_WUNLOCK(inp);
2588                         SCTP_ASOC_CREATE_UNLOCK(inp);
2589                         SCTP_INP_INFO_WUNLOCK();
2590                         SCTP_ITERATOR_UNLOCK();
2591 #ifdef SCTP_LOG_CLOSING
2592                         sctp_log_closing(inp, NULL, 2);
2593 #endif
2594                         return;
2595                 }
2596         }
2597         inp->sctp_socket = NULL;
2598         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2599             SCTP_PCB_FLAGS_UNBOUND) {
2600                 /*
2601                  * ok, this guy has been bound. It's port is somewhere in
2602                  * the sctppcbinfo hash table. Remove it!
2603                  */
2604                 LIST_REMOVE(inp, sctp_hash);
2605                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2606         }
2607         /*
2608          * If there is a timer running to kill us, forget it, since it may
2609          * have a contest on the INP lock.. which would cause us to die ...
2610          */
2611         cnt = 0;
2612         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2613             asoc = nasoc) {
2614                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2615                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2616                         cnt++;
2617                         continue;
2618                 }
2619                 /* Free associations that are NOT killing us */
2620                 SCTP_TCB_LOCK(asoc);
2621                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
2622                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
2623                         struct mbuf *op_err;
2624                         uint32_t *ippp;
2625
2626                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2627                             0, M_DONTWAIT, 1, MT_DATA);
2628                         if (op_err) {
2629                                 /* Fill in the user initiated abort */
2630                                 struct sctp_paramhdr *ph;
2631
2632                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
2633                                     sizeof(uint32_t));
2634                                 ph = mtod(op_err, struct sctp_paramhdr *);
2635                                 ph->param_type = htons(
2636                                     SCTP_CAUSE_USER_INITIATED_ABT);
2637                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2638                                 ippp = (uint32_t *) (ph + 1);
2639                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
2640
2641                         }
2642                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
2643                         sctp_send_abort_tcb(asoc, op_err);
2644                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2645                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2646                         cnt++;
2647                         SCTP_TCB_UNLOCK(asoc);
2648                         continue;
2649                 }
2650                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2651                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2652                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2653                 }
2654                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8);
2655         }
2656         if (cnt) {
2657                 /* Ok we have someone out there that will kill us */
2658                 SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2659                 SCTP_INP_WUNLOCK(inp);
2660                 SCTP_ASOC_CREATE_UNLOCK(inp);
2661                 SCTP_INP_INFO_WUNLOCK();
2662                 SCTP_ITERATOR_UNLOCK();
2663 #ifdef SCTP_LOG_CLOSING
2664                 sctp_log_closing(inp, NULL, 3);
2665 #endif
2666                 return;
2667         }
2668         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
2669                 SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2670                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2671                 SCTP_INP_WUNLOCK(inp);
2672                 SCTP_ASOC_CREATE_UNLOCK(inp);
2673                 SCTP_INP_INFO_WUNLOCK();
2674                 SCTP_ITERATOR_UNLOCK();
2675 #ifdef SCTP_LOG_CLOSING
2676                 sctp_log_closing(inp, NULL, 4);
2677 #endif
2678                 return;
2679         }
2680         SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2681         inp->sctp_ep.signature_change.type = 0;
2682         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2683
2684 #ifdef SCTP_LOG_CLOSING
2685         sctp_log_closing(inp, NULL, 5);
2686 #endif
2687
2688         SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2689         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
2690         /* Clear the read queue */
2691         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
2692                 TAILQ_REMOVE(&inp->read_queue, sq, next);
2693                 sctp_free_remote_addr(sq->whoFrom);
2694                 if (so)
2695                         so->so_rcv.sb_cc -= sq->length;
2696                 if (sq->data) {
2697                         sctp_m_freem(sq->data);
2698                         sq->data = NULL;
2699                 }
2700                 /*
2701                  * no need to free the net count, since at this point all
2702                  * assoc's are gone.
2703                  */
2704                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2705                 SCTP_DECR_READQ_COUNT();
2706         }
2707         /* Now the sctp_pcb things */
2708         /*
2709          * free each asoc if it is not already closed/free. we can't use the
2710          * macro here since le_next will get freed as part of the
2711          * sctp_free_assoc() call.
2712          */
2713         cnt = 0;
2714         if (so) {
2715 #ifdef IPSEC
2716                 ipsec4_delete_pcbpolicy(ip_pcb);
2717 #endif                          /* IPSEC */
2718
2719                 /* Unlocks not needed since the socket is gone now */
2720         }
2721         if (ip_pcb->inp_options) {
2722                 (void)sctp_m_free(ip_pcb->inp_options);
2723                 ip_pcb->inp_options = 0;
2724         }
2725         if (ip_pcb->inp_moptions) {
2726                 ip_freemoptions(ip_pcb->inp_moptions);
2727                 ip_pcb->inp_moptions = 0;
2728         }
2729 #ifdef INET6
2730         if (ip_pcb->inp_vflag & INP_IPV6) {
2731                 struct in6pcb *in6p;
2732
2733                 in6p = (struct in6pcb *)inp;
2734                 ip6_freepcbopts(in6p->in6p_outputopts);
2735         }
2736 #endif                          /* INET6 */
2737         ip_pcb->inp_vflag = 0;
2738         /* free up authentication fields */
2739         if (inp->sctp_ep.local_auth_chunks != NULL)
2740                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2741         if (inp->sctp_ep.local_hmacs != NULL)
2742                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2743
2744         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2745         while (shared_key) {
2746                 LIST_REMOVE(shared_key, next);
2747                 sctp_free_sharedkey(shared_key);
2748                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2749         }
2750
2751         inp_save = LIST_NEXT(inp, sctp_list);
2752         LIST_REMOVE(inp, sctp_list);
2753
2754         /* fix any iterators only after out of the list */
2755         sctp_iterator_inp_being_freed(inp, inp_save);
2756         /*
2757          * if we have an address list the following will free the list of
2758          * ifaddr's that are set into this ep. Again macro limitations here,
2759          * since the LIST_FOREACH could be a bad idea.
2760          */
2761         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2762             laddr = nladdr) {
2763                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2764                 sctp_remove_laddr(laddr);
2765         }
2766
2767 #ifdef SCTP_TRACK_FREED_ASOCS
2768         /* TEMP CODE */
2769         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
2770             asoc = nasoc) {
2771                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2772                 LIST_REMOVE(asoc, sctp_tcblist);
2773                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
2774                 SCTP_DECR_ASOC_COUNT();
2775         }
2776         /* *** END TEMP CODE *** */
2777 #endif
2778         /* Now lets see about freeing the EP hash table. */
2779         if (inp->sctp_tcbhash != NULL) {
2780                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2781                 inp->sctp_tcbhash = NULL;
2782         }
2783         /* Now we must put the ep memory back into the zone pool */
2784         SCTP_INP_LOCK_DESTROY(inp);
2785         SCTP_INP_READ_DESTROY(inp);
2786         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2787         SCTP_INP_INFO_WUNLOCK();
2788
2789         SCTP_ITERATOR_UNLOCK();
2790
2791         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2792         SCTP_DECR_EP_COUNT();
2793
2794 }
2795
2796
2797 struct sctp_nets *
2798 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2799 {
2800         struct sctp_nets *net;
2801
2802         /* locate the address */
2803         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2804                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2805                         return (net);
2806         }
2807         return (NULL);
2808 }
2809
2810
2811 /*
2812  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2813  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2814  * stats of stuff.
2815  */
2816 int
2817 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
2818 {
2819         struct sctp_ifa *sctp_ifa;
2820
2821         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0);
2822         if (sctp_ifa) {
2823                 return (1);
2824         } else {
2825                 return (0);
2826         }
2827 }
2828
2829 void
2830 sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net)
2831 {
2832         net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND));
2833         /* we always get at LEAST 2 MTU's */
2834         if (net->cwnd < (2 * net->mtu)) {
2835                 net->cwnd = 2 * net->mtu;
2836         }
2837         net->ssthresh = stcb->asoc.peers_rwnd;
2838 }
2839
2840
2841 int
2842 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2843     int set_scope, int from)
2844 {
2845         /*
2846          * The following is redundant to the same lines in the
2847          * sctp_aloc_assoc() but is needed since other's call the add
2848          * address function
2849          */
2850         struct sctp_nets *net, *netfirst;
2851         int addr_inscope;
2852
2853 #ifdef SCTP_DEBUG
2854         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2855                 printf("Adding an address (from:%d) to the peer: ", from);
2856                 sctp_print_address(newaddr);
2857         }
2858 #endif
2859
2860         netfirst = sctp_findnet(stcb, newaddr);
2861         if (netfirst) {
2862                 /*
2863                  * Lie and return ok, we don't want to make the association
2864                  * go away for this behavior. It will happen in the TCP
2865                  * model in a connected socket. It does not reach the hash
2866                  * table until after the association is built so it can't be
2867                  * found. Mark as reachable, since the initial creation will
2868                  * have been cleared and the NOT_IN_ASSOC flag will have
2869                  * been added... and we don't want to end up removing it
2870                  * back out.
2871                  */
2872                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2873                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
2874                             SCTP_ADDR_UNCONFIRMED);
2875                 } else {
2876                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2877                 }
2878
2879                 return (0);
2880         }
2881         addr_inscope = 1;
2882         if (newaddr->sa_family == AF_INET) {
2883                 struct sockaddr_in *sin;
2884
2885                 sin = (struct sockaddr_in *)newaddr;
2886                 if (sin->sin_addr.s_addr == 0) {
2887                         /* Invalid address */
2888                         return (-1);
2889                 }
2890                 /* zero out the bzero area */
2891                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2892
2893                 /* assure len is set */
2894                 sin->sin_len = sizeof(struct sockaddr_in);
2895                 if (set_scope) {
2896 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2897                         stcb->ipv4_local_scope = 1;
2898 #else
2899                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2900                                 stcb->asoc.ipv4_local_scope = 1;
2901                         }
2902 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2903                 } else {
2904                         /* Validate the address is in scope */
2905                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2906                             (stcb->asoc.ipv4_local_scope == 0)) {
2907                                 addr_inscope = 0;
2908                         }
2909                 }
2910         } else if (newaddr->sa_family == AF_INET6) {
2911                 struct sockaddr_in6 *sin6;
2912
2913                 sin6 = (struct sockaddr_in6 *)newaddr;
2914                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2915                         /* Invalid address */
2916                         return (-1);
2917                 }
2918                 /* assure len is set */
2919                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2920                 if (set_scope) {
2921                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
2922                                 stcb->asoc.loopback_scope = 1;
2923                                 stcb->asoc.local_scope = 0;
2924                                 stcb->asoc.ipv4_local_scope = 1;
2925                                 stcb->asoc.site_scope = 1;
2926                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2927                                 /*
2928                                  * If the new destination is a LINK_LOCAL we
2929                                  * must have common site scope. Don't set
2930                                  * the local scope since we may not share
2931                                  * all links, only loopback can do this.
2932                                  * Links on the local network would also be
2933                                  * on our private network for v4 too.
2934                                  */
2935                                 stcb->asoc.ipv4_local_scope = 1;
2936                                 stcb->asoc.site_scope = 1;
2937                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2938                                 /*
2939                                  * If the new destination is SITE_LOCAL then
2940                                  * we must have site scope in common.
2941                                  */
2942                                 stcb->asoc.site_scope = 1;
2943                         }
2944                 } else {
2945                         /* Validate the address is in scope */
2946                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2947                             (stcb->asoc.loopback_scope == 0)) {
2948                                 addr_inscope = 0;
2949                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2950                             (stcb->asoc.local_scope == 0)) {
2951                                 addr_inscope = 0;
2952                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2953                             (stcb->asoc.site_scope == 0)) {
2954                                 addr_inscope = 0;
2955                         }
2956                 }
2957         } else {
2958                 /* not supported family type */
2959                 return (-1);
2960         }
2961         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
2962         if (net == NULL) {
2963                 return (-1);
2964         }
2965         SCTP_INCR_RADDR_COUNT();
2966         bzero(net, sizeof(*net));
2967         SCTP_GETTIME_TIMEVAL(&net->start_time);
2968         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2969         if (newaddr->sa_family == AF_INET) {
2970                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2971         } else if (newaddr->sa_family == AF_INET6) {
2972                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2973         }
2974         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
2975         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
2976                 stcb->asoc.loopback_scope = 1;
2977                 stcb->asoc.ipv4_local_scope = 1;
2978                 stcb->asoc.local_scope = 0;
2979                 stcb->asoc.site_scope = 1;
2980                 addr_inscope = 1;
2981         }
2982         net->failure_threshold = stcb->asoc.def_net_failure;
2983         if (addr_inscope == 0) {
2984                 net->dest_state = (SCTP_ADDR_REACHABLE |
2985                     SCTP_ADDR_OUT_OF_SCOPE);
2986         } else {
2987                 if (from == SCTP_ADDR_IS_CONFIRMED)
2988                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
2989                         net->dest_state = SCTP_ADDR_REACHABLE;
2990                 else
2991                         net->dest_state = SCTP_ADDR_REACHABLE |
2992                             SCTP_ADDR_UNCONFIRMED;
2993         }
2994         net->RTO = stcb->asoc.initial_rto;
2995         stcb->asoc.numnets++;
2996         *(&net->ref_count) = 1;
2997         net->tos_flowlabel = 0;
2998 #ifdef INET
2999         if (newaddr->sa_family == AF_INET)
3000                 net->tos_flowlabel = stcb->asoc.default_tos;
3001 #endif
3002 #ifdef INET6
3003         if (newaddr->sa_family == AF_INET6)
3004                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3005 #endif
3006         /* Init the timer structure */
3007         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3008         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3009         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3010
3011         /* Now generate a route for this guy */
3012         /* KAME hack: embed scopeid */
3013         if (newaddr->sa_family == AF_INET6) {
3014                 struct sockaddr_in6 *sin6;
3015
3016                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3017                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3018                 sin6->sin6_scope_id = 0;
3019         }
3020         rtalloc_ign((struct route *)&net->ro, 0UL);
3021
3022         if (newaddr->sa_family == AF_INET6) {
3023                 struct sockaddr_in6 *sin6;
3024
3025                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3026                 (void)sa6_recoverscope(sin6);
3027         }
3028         if ((net->ro.ro_rt) &&
3029             (net->ro.ro_rt->rt_ifp)) {
3030                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
3031                 if (from == SCTP_ALLOC_ASOC) {
3032                         stcb->asoc.smallest_mtu = net->mtu;
3033                 }
3034                 /* start things off to match mtu of interface please. */
3035                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
3036         } else {
3037                 net->mtu = stcb->asoc.smallest_mtu;
3038         }
3039
3040         if (stcb->asoc.smallest_mtu > net->mtu) {
3041                 stcb->asoc.smallest_mtu = net->mtu;
3042         }
3043         /*
3044          * We take the max of the burst limit times a MTU or the
3045          * INITIAL_CWND. We then limit this to 4 MTU's of sending.
3046          */
3047         sctp_set_initial_cc_param(stcb, net);
3048
3049
3050 #if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING)
3051         sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION);
3052 #endif
3053
3054         /*
3055          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3056          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3057          */
3058         net->find_pseudo_cumack = 1;
3059         net->find_rtx_pseudo_cumack = 1;
3060         net->src_addr_selected = 0;
3061         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3062         if (net->ro.ro_rt == NULL) {
3063                 /* Since we have no route put it at the back */
3064                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3065         } else if (netfirst == NULL) {
3066                 /* We are the first one in the pool. */
3067                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3068         } else if (netfirst->ro.ro_rt == NULL) {
3069                 /*
3070                  * First one has NO route. Place this one ahead of the first
3071                  * one.
3072                  */
3073                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3074         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3075                 /*
3076                  * This one has a different interface than the one at the
3077                  * top of the list. Place it ahead.
3078                  */
3079                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3080         } else {
3081                 /*
3082                  * Ok we have the same interface as the first one. Move
3083                  * forward until we find either a) one with a NULL route...
3084                  * insert ahead of that b) one with a different ifp.. insert
3085                  * after that. c) end of the list.. insert at the tail.
3086                  */
3087                 struct sctp_nets *netlook;
3088
3089                 do {
3090                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3091                         if (netlook == NULL) {
3092                                 /* End of the list */
3093                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3094                                 break;
3095                         } else if (netlook->ro.ro_rt == NULL) {
3096                                 /* next one has NO route */
3097                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3098                                 break;
3099                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3100                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3101                                     net, sctp_next);
3102                                 break;
3103                         }
3104                         /* Shift forward */
3105                         netfirst = netlook;
3106                 } while (netlook != NULL);
3107         }
3108
3109         /* got to have a primary set */
3110         if (stcb->asoc.primary_destination == 0) {
3111                 stcb->asoc.primary_destination = net;
3112         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3113                     (net->ro.ro_rt) &&
3114             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3115                 /* No route to current primary adopt new primary */
3116                 stcb->asoc.primary_destination = net;
3117         }
3118         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3119             net);
3120         /* Validate primary is first */
3121         net = TAILQ_FIRST(&stcb->asoc.nets);
3122         if ((net != stcb->asoc.primary_destination) &&
3123             (stcb->asoc.primary_destination)) {
3124                 /*
3125                  * first one on the list is NOT the primary sctp_cmpaddr()
3126                  * is much more efficent if the primary is the first on the
3127                  * list, make it so.
3128                  */
3129                 TAILQ_REMOVE(&stcb->asoc.nets,
3130                     stcb->asoc.primary_destination, sctp_next);
3131                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3132                     stcb->asoc.primary_destination, sctp_next);
3133         }
3134         return (0);
3135 }
3136
3137
3138 /*
3139  * allocate an association and add it to the endpoint. The caller must be
3140  * careful to add all additional addresses once they are know right away or
3141  * else the assoc will be may experience a blackout scenario.
3142  */
3143 struct sctp_tcb *
3144 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3145     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf)
3146 {
3147         struct sctp_tcb *stcb;
3148         struct sctp_association *asoc;
3149         struct sctpasochead *head;
3150         uint16_t rport;
3151         int err;
3152
3153         /*
3154          * Assumption made here: Caller has done a
3155          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3156          * address does not exist already.
3157          */
3158         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3159                 /* Hit max assoc, sorry no more */
3160                 *error = ENOBUFS;
3161                 return (NULL);
3162         }
3163         SCTP_INP_RLOCK(inp);
3164         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3165                 /*
3166                  * If its in the TCP pool, its NOT allowed to create an
3167                  * association. The parent listener needs to call
3168                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3169                  * off, or connected one does this.. its an error.
3170                  */
3171                 SCTP_INP_RUNLOCK(inp);
3172                 *error = EINVAL;
3173                 return (NULL);
3174         }
3175 #ifdef SCTP_DEBUG
3176         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3177                 printf("Allocate an association for peer:");
3178                 if (firstaddr)
3179                         sctp_print_address(firstaddr);
3180                 else
3181                         printf("None\n");
3182                 printf("Port:%d\n",
3183                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3184         }
3185 #endif                          /* SCTP_DEBUG */
3186         if (firstaddr->sa_family == AF_INET) {
3187                 struct sockaddr_in *sin;
3188
3189                 sin = (struct sockaddr_in *)firstaddr;
3190                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3191                         /* Invalid address */
3192                         SCTP_INP_RUNLOCK(inp);
3193                         *error = EINVAL;
3194                         return (NULL);
3195                 }
3196                 rport = sin->sin_port;
3197         } else if (firstaddr->sa_family == AF_INET6) {
3198                 struct sockaddr_in6 *sin6;
3199
3200                 sin6 = (struct sockaddr_in6 *)firstaddr;
3201                 if ((sin6->sin6_port == 0) ||
3202                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3203                         /* Invalid address */
3204                         SCTP_INP_RUNLOCK(inp);
3205                         *error = EINVAL;
3206                         return (NULL);
3207                 }
3208                 rport = sin6->sin6_port;
3209         } else {
3210                 /* not supported family type */
3211                 SCTP_INP_RUNLOCK(inp);
3212                 *error = EINVAL;
3213                 return (NULL);
3214         }
3215         SCTP_INP_RUNLOCK(inp);
3216         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3217                 /*
3218                  * If you have not performed a bind, then we need to do the
3219                  * ephemerial bind for you.
3220                  */
3221                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3222                     (struct sockaddr *)NULL,
3223                     (struct thread *)NULL
3224                     ))) {
3225                         /* bind error, probably perm */
3226                         *error = err;
3227                         return (NULL);
3228                 }
3229         }
3230         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3231         if (stcb == NULL) {
3232                 /* out of memory? */
3233                 *error = ENOMEM;
3234                 return (NULL);
3235         }
3236         SCTP_INCR_ASOC_COUNT();
3237
3238         bzero(stcb, sizeof(*stcb));
3239         asoc = &stcb->asoc;
3240         SCTP_TCB_LOCK_INIT(stcb);
3241         SCTP_TCB_SEND_LOCK_INIT(stcb);
3242         /* setup back pointer's */
3243         stcb->sctp_ep = inp;
3244         stcb->sctp_socket = inp->sctp_socket;
3245         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag, vrf))) {
3246                 /* failed */
3247                 SCTP_TCB_LOCK_DESTROY(stcb);
3248                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3249                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3250                 SCTP_DECR_ASOC_COUNT();
3251                 *error = err;
3252                 return (NULL);
3253         }
3254         /* and the port */
3255         stcb->rport = rport;
3256         SCTP_INP_INFO_WLOCK();
3257         SCTP_INP_WLOCK(inp);
3258         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3259                 /* inpcb freed while alloc going on */
3260                 SCTP_TCB_LOCK_DESTROY(stcb);
3261                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3262                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3263                 SCTP_INP_WUNLOCK(inp);
3264                 SCTP_INP_INFO_WUNLOCK();
3265                 SCTP_DECR_ASOC_COUNT();
3266                 *error = EINVAL;
3267                 return (NULL);
3268         }
3269         SCTP_TCB_LOCK(stcb);
3270
3271         /* now that my_vtag is set, add it to the hash */
3272         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3273             sctppcbinfo.hashasocmark)];
3274         /* put it in the bucket in the vtag hash of assoc's for the system */
3275         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3276         SCTP_INP_INFO_WUNLOCK();
3277
3278         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3279                 /* failure.. memory error? */
3280                 if (asoc->strmout)
3281                         SCTP_FREE(asoc->strmout);
3282                 if (asoc->mapping_array)
3283                         SCTP_FREE(asoc->mapping_array);
3284
3285                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3286                 SCTP_DECR_ASOC_COUNT();
3287                 SCTP_TCB_LOCK_DESTROY(stcb);
3288                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3289                 SCTP_INP_WUNLOCK(inp);
3290                 *error = ENOBUFS;
3291                 return (NULL);
3292         }
3293         /* Init all the timers */
3294         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3295         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3296         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3297         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3298         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3299         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3300         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3301
3302         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3303         /* now file the port under the hash as well */
3304         if (inp->sctp_tcbhash != NULL) {
3305                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3306                     inp->sctp_hashmark)];
3307                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3308         }
3309         SCTP_INP_WUNLOCK(inp);
3310 #ifdef SCTP_DEBUG
3311         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3312                 printf("Association %p now allocated\n", stcb);
3313         }
3314 #endif
3315         return (stcb);
3316 }
3317
3318
3319 void
3320 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3321 {
3322         struct sctp_association *asoc;
3323
3324         asoc = &stcb->asoc;
3325         asoc->numnets--;
3326         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3327         if (net == asoc->primary_destination) {
3328                 /* Reset primary */
3329                 struct sctp_nets *lnet;
3330
3331                 lnet = TAILQ_FIRST(&asoc->nets);
3332                 /* Try to find a confirmed primary */
3333                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3334         }
3335         if (net == asoc->last_data_chunk_from) {
3336                 /* Reset primary */
3337                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3338         }
3339         if (net == asoc->last_control_chunk_from) {
3340                 /* Clear net */
3341                 asoc->last_control_chunk_from = NULL;
3342         }
3343         sctp_free_remote_addr(net);
3344 }
3345
3346 /*
3347  * remove a remote endpoint address from an association, it will fail if the
3348  * address does not exist.
3349  */
3350 int
3351 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3352 {
3353         /*
3354          * Here we need to remove a remote address. This is quite simple, we
3355          * first find it in the list of address for the association
3356          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3357          * on that item. Note we do not allow it to be removed if there are
3358          * no other addresses.
3359          */
3360         struct sctp_association *asoc;
3361         struct sctp_nets *net, *net_tmp;
3362
3363         asoc = &stcb->asoc;
3364
3365         /* locate the address */
3366         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3367                 net_tmp = TAILQ_NEXT(net, sctp_next);
3368                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3369                         continue;
3370                 }
3371                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3372                     remaddr)) {
3373                         /* we found the guy */
3374                         if (asoc->numnets < 2) {
3375                                 /* Must have at LEAST two remote addresses */
3376                                 return (-1);
3377                         } else {
3378                                 sctp_remove_net(stcb, net);
3379                                 return (0);
3380                         }
3381                 }
3382         }
3383         /* not found. */
3384         return (-2);
3385 }
3386
3387
3388 void
3389 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time)
3390 {
3391         struct sctpvtaghead *chain;
3392         struct sctp_tagblock *twait_block;
3393         struct timeval now;
3394         int set, i;
3395
3396         SCTP_GETTIME_TIMEVAL(&now);
3397         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3398         set = 0;
3399         if (!SCTP_LIST_EMPTY(chain)) {
3400                 /* Block(s) present, lets find space, and expire on the fly */
3401                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3402                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3403                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3404                                     !set) {
3405                                         twait_block->vtag_block[i].tv_sec_at_expire =
3406                                             now.tv_sec + time;
3407                                         twait_block->vtag_block[i].v_tag = tag;
3408                                         set = 1;
3409                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3410                                             ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3411                                     now.tv_sec)) {
3412                                         /* Audit expires this guy */
3413                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3414                                         twait_block->vtag_block[i].v_tag = 0;
3415                                         if (set == 0) {
3416                                                 /* Reuse it for my new tag */
3417                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3418                                                 twait_block->vtag_block[0].v_tag = tag;
3419                                                 set = 1;
3420                                         }
3421                                 }
3422                         }
3423                         if (set) {
3424                                 /*
3425                                  * We only do up to the block where we can
3426                                  * place our tag for audits
3427                                  */
3428                                 break;
3429                         }
3430                 }
3431         }
3432         /* Need to add a new block to chain */
3433         if (!set) {
3434                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3435                     sizeof(struct sctp_tagblock), "TimeWait");
3436                 if (twait_block == NULL) {
3437                         return;
3438                 }
3439                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
3440                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3441                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3442                     SCTP_TIME_WAIT;
3443                 twait_block->vtag_block[0].v_tag = tag;
3444         }
3445 }
3446
3447
3448 static void
3449 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3450 {
3451         struct sctp_iterator *it;
3452
3453         /*
3454          * Unlock the tcb lock we do this so we avoid a dead lock scenario
3455          * where the iterator is waiting on the TCB lock and the TCB lock is
3456          * waiting on the iterator lock.
3457          */
3458         it = stcb->asoc.stcb_starting_point_for_iterator;
3459         if (it == NULL) {
3460                 return;
3461         }
3462         if (it->inp != stcb->sctp_ep) {
3463                 /* hmm, focused on the wrong one? */
3464                 return;
3465         }
3466         if (it->stcb != stcb) {
3467                 return;
3468         }
3469         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3470         if (it->stcb == NULL) {
3471                 /* done with all asoc's in this assoc */
3472                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3473                         it->inp = NULL;
3474                 } else {
3475                         it->inp = LIST_NEXT(inp, sctp_list);
3476                 }
3477         }
3478 }
3479
3480
3481 /*
3482  * Free the association after un-hashing the remote port.
3483  */
3484 int
3485 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
3486 {
3487         int i;
3488         struct sctp_association *asoc;
3489         struct sctp_nets *net, *prev;
3490         struct sctp_laddr *laddr;
3491         struct sctp_tmit_chunk *chk;
3492         struct sctp_asconf_addr *aparam;
3493         struct sctp_stream_reset_list *liste;
3494         struct sctp_queued_to_read *sq;
3495         struct sctp_stream_queue_pending *sp;
3496         sctp_sharedkey_t *shared_key;
3497         struct socket *so;
3498         int ccnt = 0;
3499         int cnt = 0;
3500
3501         /* first, lets purge the entry from the hash table. */
3502
3503 #ifdef SCTP_LOG_CLOSING
3504         sctp_log_closing(inp, stcb, 6);
3505 #endif
3506         if (stcb->asoc.state == 0) {
3507 #ifdef SCTP_LOG_CLOSING
3508                 sctp_log_closing(inp, NULL, 7);
3509 #endif
3510                 /* there is no asoc, really TSNH :-0 */
3511                 return (1);
3512         }
3513         /* TEMP CODE */
3514         if (stcb->freed_from_where == 0) {
3515                 /* Only record the first place free happened from */
3516                 stcb->freed_from_where = from_location;
3517         }
3518         /* TEMP CODE */
3519
3520         asoc = &stcb->asoc;
3521         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3522             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3523                 /* nothing around */
3524                 so = NULL;
3525         else
3526                 so = inp->sctp_socket;
3527
3528         /*
3529          * We used timer based freeing if a reader or writer is in the way.
3530          * So we first check if we are actually being called from a timer,
3531          * if so we abort early if a reader or writer is still in the way.
3532          */
3533         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3534             (from_inpcbfree == SCTP_NORMAL_PROC)) {
3535                 /*
3536                  * is it the timer driving us? if so are the reader/writers
3537                  * gone?
3538                  */
3539                 if (stcb->asoc.refcnt) {
3540                         /* nope, reader or writer in the way */
3541                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3542                         /* no asoc destroyed */
3543                         SCTP_TCB_UNLOCK(stcb);
3544 #ifdef SCTP_LOG_CLOSING
3545                         sctp_log_closing(inp, stcb, 8);
3546 #endif
3547                         return (0);
3548                 }
3549         }
3550         /* now clean up any other timers */
3551         SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3552         SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3553         SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3554         SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3555         SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3556         SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3557         SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3558
3559         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3560                 SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3561                 SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3562                 SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3563         }
3564         /* Now the read queue needs to be cleaned up (only once) */
3565         cnt = 0;
3566         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
3567                 SCTP_INP_READ_LOCK(inp);
3568                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
3569                         if (sq->stcb == stcb) {
3570                                 sq->do_not_ref_stcb = 1;
3571                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3572                                 /*
3573                                  * If there is no end, there never will be
3574                                  * now.
3575                                  */
3576                                 if (sq->end_added == 0) {
3577                                         /* Held for PD-API clear that. */
3578                                         sq->pdapi_aborted = 1;
3579                                         sq->held_length = 0;
3580                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3581                                                 /*
3582                                                  * Need to add a PD-API
3583                                                  * aborted indication.
3584                                                  * Setting the control_pdapi
3585                                                  * assures that it will be
3586                                                  * added right after this
3587                                                  * msg.
3588                                                  */
3589                                                 stcb->asoc.control_pdapi = sq;
3590                                                 sctp_notify_partial_delivery_indication(stcb,
3591                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1);
3592                                                 stcb->asoc.control_pdapi = NULL;
3593                                         }
3594                                 }
3595                                 /* Add an end to wake them */
3596                                 sq->end_added = 1;
3597                                 cnt++;
3598                         }
3599                 }
3600                 SCTP_INP_READ_UNLOCK(inp);
3601                 if (stcb->block_entry) {
3602                         cnt++;
3603                         stcb->block_entry->error = ECONNRESET;
3604                         stcb->block_entry = NULL;
3605                 }
3606         }
3607         stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3608         if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) {
3609                 /*
3610                  * reader or writer in the way, we have hopefully given him
3611                  * something to chew on above.
3612                  */
3613                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3614                 SCTP_TCB_UNLOCK(stcb);
3615                 if (so) {
3616                         SCTP_INP_RLOCK(inp);
3617                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3618                             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3619                                 /* nothing around */
3620                                 so = NULL;
3621                         if (so) {
3622                                 /* Wake any reader/writers */
3623                                 sctp_sorwakeup(inp, so);
3624                                 sctp_sowwakeup(inp, so);
3625                         }
3626                         SCTP_INP_RUNLOCK(inp);
3627
3628                 }
3629 #ifdef SCTP_LOG_CLOSING
3630                 sctp_log_closing(inp, stcb, 9);
3631 #endif
3632                 /* no asoc destroyed */
3633                 return (0);
3634         }
3635 #ifdef SCTP_LOG_CLOSING
3636         sctp_log_closing(inp, stcb, 10);
3637 #endif
3638         /*
3639          * When I reach here, no others want to kill the assoc yet.. and I
3640          * own the lock. Now its possible an abort comes in when I do the
3641          * lock exchange below to grab all the locks to do the final take
3642          * out. to prevent this we increment the count, which will start a
3643          * timer and blow out above thus assuring us that we hold exclusive
3644          * killing of the asoc. Note that after getting back the TCB lock we
3645          * will go ahead and increment the counter back up and stop any
3646          * timer a passing stranger may have started :-S
3647          */
3648         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3649                 atomic_add_int(&stcb->asoc.refcnt, 1);
3650
3651                 SCTP_TCB_UNLOCK(stcb);
3652
3653                 SCTP_ITERATOR_LOCK();
3654                 SCTP_INP_INFO_WLOCK();
3655                 SCTP_INP_WLOCK(inp);
3656                 SCTP_TCB_LOCK(stcb);
3657         }
3658         /* Double check the GONE flag */
3659         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3660             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3661                 /* nothing around */
3662                 so = NULL;
3663
3664         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3665             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3666                 /*
3667                  * For TCP type we need special handling when we are
3668                  * connected. We also include the peel'ed off ones to.
3669                  */
3670                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3671                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3672                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3673                         if (so) {
3674                                 SOCK_LOCK(so);
3675                                 if (so->so_rcv.sb_cc == 0) {
3676                                         so->so_state &= ~(SS_ISCONNECTING |
3677                                             SS_ISDISCONNECTING |
3678                                             SS_ISCONFIRMING |
3679                                             SS_ISCONNECTED);
3680                                 }
3681                                 SOCK_UNLOCK(so);
3682                                 sctp_sowwakeup(inp, so);
3683                                 sctp_sorwakeup(inp, so);
3684                                 wakeup(&so->so_timeo);
3685                         }
3686                 }
3687         }
3688         /*
3689          * Make it invalid too, that way if its about to run it will abort
3690          * and return.
3691          */
3692         sctp_iterator_asoc_being_freed(inp, stcb);
3693         /* re-increment the lock */
3694         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3695                 atomic_add_int(&stcb->asoc.refcnt, -1);
3696         }
3697         asoc->state = 0;
3698         if (inp->sctp_tcbhash) {
3699                 LIST_REMOVE(stcb, sctp_tcbhash);
3700         }
3701         if (stcb->asoc.in_restart_hash) {
3702                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3703         }
3704         /* Now lets remove it from the list of ALL associations in the EP */
3705         LIST_REMOVE(stcb, sctp_tcblist);
3706         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3707                 SCTP_INP_INCR_REF(inp);
3708                 SCTP_INP_WUNLOCK(inp);
3709                 SCTP_ITERATOR_UNLOCK();
3710         }
3711         /* pull from vtag hash */
3712         LIST_REMOVE(stcb, sctp_asocs);
3713         sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT);
3714
3715
3716         /*
3717          * Now restop the timers to be sure - this is paranoia at is finest!
3718          */
3719         SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3720         SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3721         SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3722         SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3723         SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3724         SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3725         SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3726         SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3727
3728         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3729                 SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3730                 SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3731                 SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3732         }
3733
3734         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3735         prev = NULL;
3736         /*
3737          * The chunk lists and such SHOULD be empty but we check them just
3738          * in case.
3739          */
3740         /* anything on the wheel needs to be removed */
3741         for (i = 0; i < asoc->streamoutcnt; i++) {
3742                 struct sctp_stream_out *outs;
3743
3744                 outs = &asoc->strmout[i];
3745                 /* now clean up any chunks here */
3746                 sp = TAILQ_FIRST(&outs->outqueue);
3747                 while (sp) {
3748                         TAILQ_REMOVE(&outs->outqueue, sp, next);
3749                         if (sp->data) {
3750                                 sctp_m_freem(sp->data);
3751                                 sp->data = NULL;
3752                                 sp->tail_mbuf = NULL;
3753                         }
3754                         sctp_free_remote_addr(sp->net);
3755                         sctp_free_spbufspace(stcb, asoc, sp);
3756                         /* Free the zone stuff  */
3757                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3758                         SCTP_DECR_STRMOQ_COUNT();
3759                         sp = TAILQ_FIRST(&outs->outqueue);
3760                 }
3761         }
3762
3763         while ((sp = TAILQ_FIRST(&asoc->free_strmoq)) != NULL) {
3764                 TAILQ_REMOVE(&asoc->free_strmoq, sp, next);
3765                 if (sp->data) {
3766                         sctp_m_freem(sp->data);
3767                         sp->data = NULL;
3768                         sp->tail_mbuf = NULL;
3769                 }
3770                 /* Free the zone stuff  */
3771                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3772                 SCTP_DECR_STRMOQ_COUNT();
3773                 atomic_add_int(&sctppcbinfo.ipi_free_strmoq, -1);
3774         }
3775
3776         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3777                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3778                 SCTP_FREE(liste);
3779         }
3780
3781         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3782         while (sq) {
3783                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3784                 if (sq->data) {
3785                         sctp_m_freem(sq->data);
3786                         sq->data = NULL;
3787                 }
3788                 sctp_free_remote_addr(sq->whoFrom);
3789                 sq->whoFrom = NULL;
3790                 sq->stcb = NULL;
3791                 /* Free the ctl entry */
3792                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3793                 SCTP_DECR_READQ_COUNT();
3794                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3795         }
3796
3797         chk = TAILQ_FIRST(&asoc->free_chunks);
3798         while (chk) {
3799                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3800                 if (chk->data) {
3801                         sctp_m_freem(chk->data);
3802                         chk->data = NULL;
3803                 }
3804                 ccnt++;
3805                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3806                 SCTP_DECR_CHK_COUNT();
3807                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
3808                 asoc->free_chunk_cnt--;
3809                 chk = TAILQ_FIRST(&asoc->free_chunks);
3810         }
3811         /* pending send queue SHOULD be empty */
3812         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3813                 chk = TAILQ_FIRST(&asoc->send_queue);
3814                 while (chk) {
3815                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3816                         if (chk->data) {
3817                                 sctp_m_freem(chk->data);
3818                                 chk->data = NULL;
3819                         }
3820                         ccnt++;
3821                         sctp_free_remote_addr(chk->whoTo);
3822                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3823                         SCTP_DECR_CHK_COUNT();
3824                         chk = TAILQ_FIRST(&asoc->send_queue);
3825                 }
3826         }
3827 /*
3828   if(ccnt) {
3829   printf("Freed %d from send_queue\n", ccnt);
3830   ccnt = 0;
3831   }
3832 */
3833         /* sent queue SHOULD be empty */
3834         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3835                 chk = TAILQ_FIRST(&asoc->sent_queue);
3836                 while (chk) {
3837                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3838                         if (chk->data) {
3839                                 sctp_m_freem(chk->data);
3840                                 chk->data = NULL;
3841                         }
3842                         ccnt++;
3843                         sctp_free_remote_addr(chk->whoTo);
3844                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3845                         SCTP_DECR_CHK_COUNT();
3846                         chk = TAILQ_FIRST(&asoc->sent_queue);
3847                 }
3848         }
3849 /*
3850   if(ccnt) {
3851   printf("Freed %d from sent_queue\n", ccnt);
3852   ccnt = 0;
3853   }
3854 */
3855         /* control queue MAY not be empty */
3856         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3857                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3858                 while (chk) {
3859                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3860                         if (chk->data) {
3861                                 sctp_m_freem(chk->data);
3862                                 chk->data = NULL;
3863                         }
3864                         ccnt++;
3865                         sctp_free_remote_addr(chk->whoTo);
3866                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3867                         SCTP_DECR_CHK_COUNT();
3868                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3869                 }
3870         }
3871 /*
3872   if(ccnt) {
3873   printf("Freed %d from ctrl_queue\n", ccnt);
3874   ccnt = 0;
3875   }
3876 */
3877         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3878                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3879                 while (chk) {
3880                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3881                         if (chk->data) {
3882                                 sctp_m_freem(chk->data);
3883                                 chk->data = NULL;
3884                         }
3885                         sctp_free_remote_addr(chk->whoTo);
3886                         ccnt++;
3887                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3888                         SCTP_DECR_CHK_COUNT();
3889                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3890                 }
3891         }
3892 /*
3893   if(ccnt) {
3894   printf("Freed %d from reasm_queue\n", ccnt);
3895   ccnt = 0;
3896   }
3897 */
3898         if (asoc->mapping_array) {
3899                 SCTP_FREE(asoc->mapping_array);
3900                 asoc->mapping_array = NULL;
3901         }
3902         /* the stream outs */
3903         if (asoc->strmout) {
3904                 SCTP_FREE(asoc->strmout);
3905                 asoc->strmout = NULL;
3906         }
3907         asoc->streamoutcnt = 0;
3908         if (asoc->strmin) {
3909                 struct sctp_queued_to_read *ctl;
3910
3911                 for (i = 0; i < asoc->streamincnt; i++) {
3912                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3913                                 /* We have somethings on the streamin queue */
3914                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3915                                 while (ctl) {
3916                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3917                                             ctl, next);
3918                                         sctp_free_remote_addr(ctl->whoFrom);
3919                                         if (ctl->data) {
3920                                                 sctp_m_freem(ctl->data);
3921                                                 ctl->data = NULL;
3922                                         }
3923                                         /*
3924                                          * We don't free the address here
3925                                          * since all the net's were freed
3926                                          * above.
3927                                          */
3928                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
3929                                         SCTP_DECR_READQ_COUNT();
3930                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3931                                 }
3932                         }
3933                 }
3934                 SCTP_FREE(asoc->strmin);
3935                 asoc->strmin = NULL;
3936         }
3937         asoc->streamincnt = 0;
3938         while (!TAILQ_EMPTY(&asoc->nets)) {
3939                 net = TAILQ_FIRST(&asoc->nets);
3940                 /* pull from list */
3941                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3942 #ifdef INVARIANTS
3943                         panic("no net's left alloc'ed, or list points to itself");
3944 #endif
3945                         break;
3946                 }
3947                 prev = net;
3948                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3949                 sctp_free_remote_addr(net);
3950         }
3951
3952         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
3953                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
3954                 sctp_remove_laddr(laddr);
3955         }
3956
3957         /* pending asconf (address) parameters */
3958         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3959                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3960                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3961                 SCTP_FREE(aparam);
3962         }
3963         if (asoc->last_asconf_ack_sent != NULL) {
3964                 sctp_m_freem(asoc->last_asconf_ack_sent);
3965                 asoc->last_asconf_ack_sent = NULL;
3966         }
3967         /* clean up auth stuff */
3968         if (asoc->local_hmacs)
3969                 sctp_free_hmaclist(asoc->local_hmacs);
3970         if (asoc->peer_hmacs)
3971                 sctp_free_hmaclist(asoc->peer_hmacs);
3972
3973         if (asoc->local_auth_chunks)
3974                 sctp_free_chunklist(asoc->local_auth_chunks);
3975         if (asoc->peer_auth_chunks)
3976                 sctp_free_chunklist(asoc->peer_auth_chunks);
3977
3978         sctp_free_authinfo(&asoc->authinfo);
3979
3980         shared_key = LIST_FIRST(&asoc->shared_keys);
3981         while (shared_key) {
3982                 LIST_REMOVE(shared_key, next);
3983                 sctp_free_sharedkey(shared_key);
3984                 shared_key = LIST_FIRST(&asoc->shared_keys);
3985         }
3986
3987         /* Insert new items here :> */
3988
3989         /* Get rid of LOCK */
3990         SCTP_TCB_LOCK_DESTROY(stcb);
3991         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3992         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3993                 SCTP_INP_INFO_WUNLOCK();
3994                 SCTP_INP_RLOCK(inp);
3995         }
3996 #ifdef SCTP_TRACK_FREED_ASOCS
3997         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
3998                 /* now clean up the tasoc itself */
3999                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4000                 SCTP_DECR_ASOC_COUNT();
4001         } else {
4002                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4003         }
4004 #else
4005         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4006         SCTP_DECR_ASOC_COUNT();
4007 #endif
4008         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4009                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4010                         /*
4011                          * If its NOT the inp_free calling us AND sctp_close
4012                          * as been called, we call back...
4013                          */
4014                         SCTP_INP_RUNLOCK(inp);
4015                         /*
4016                          * This will start the kill timer (if we are the
4017                          * lastone) since we hold an increment yet. But this
4018                          * is the only safe way to do this since otherwise
4019                          * if the socket closes at the same time we are here
4020                          * we might collide in the cleanup.
4021                          */
4022                         sctp_inpcb_free(inp, 0, 0);
4023                         SCTP_INP_DECR_REF(inp);
4024                         goto out_of;
4025                 } else {
4026                         /* The socket is still open. */
4027                         SCTP_INP_DECR_REF(inp);
4028                 }
4029         }
4030         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4031                 SCTP_INP_RUNLOCK(inp);
4032         }
4033 out_of:
4034         /* destroyed the asoc */
4035 #ifdef SCTP_LOG_CLOSING
4036         sctp_log_closing(inp, NULL, 11);
4037 #endif
4038         return (1);
4039 }
4040
4041
4042
4043 /*
4044  * determine if a destination is "reachable" based upon the addresses bound
4045  * to the current endpoint (e.g. only v4 or v6 currently bound)
4046  */
4047 /*
4048  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4049  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4050  * types bound as its endpoint
4051  */
4052 int
4053 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4054 {
4055         struct sctp_inpcb *inp;
4056         int answer;
4057
4058         /*
4059          * No locks here, the TCB, in all cases is already locked and an
4060          * assoc is up. There is either a INP lock by the caller applied (in
4061          * asconf case when deleting an address) or NOT in the HB case,
4062          * however if HB then the INP increment is up and the INP will not
4063          * be removed (on top of the fact that we have a TCB lock). So we
4064          * only want to read the sctp_flags, which is either bound-all or
4065          * not.. no protection needed since once an assoc is up you can't be
4066          * changing your binding.
4067          */
4068         inp = stcb->sctp_ep;
4069         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4070                 /* if bound all, destination is not restricted */
4071                 /*
4072                  * RRS: Question during lock work: Is this correct? If you
4073                  * are bound-all you still might need to obey the V4--V6
4074                  * flags??? IMO this bound-all stuff needs to be removed!
4075                  */
4076                 return (1);
4077         }
4078         /* NOTE: all "scope" checks are done when local addresses are added */
4079         if (destaddr->sa_family == AF_INET6) {
4080                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4081         } else if (destaddr->sa_family == AF_INET) {
4082                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4083         } else {
4084                 /* invalid family, so it's unreachable */
4085                 answer = 0;
4086         }
4087         return (answer);
4088 }
4089
4090 /*
4091  * update the inp_vflags on an endpoint
4092  */
4093 static void
4094 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4095 {
4096         struct sctp_laddr *laddr;
4097
4098         /* first clear the flag */
4099         inp->ip_inp.inp.inp_vflag = 0;
4100         /* set the flag based on addresses on the ep list */
4101         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4102                 if (laddr->ifa == NULL) {
4103 #ifdef SCTP_DEBUG
4104                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4105                                 printf("An ounce of prevention is worth a pound of cure\n");
4106                         }
4107 #endif                          /* SCTP_DEBUG */
4108                         continue;
4109                 }
4110                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4111                         continue;
4112                 }
4113                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4114                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4115                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4116                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4117                 }
4118         }
4119 }
4120
4121 /*
4122  * Add the address to the endpoint local address list There is nothing to be
4123  * done if we are bound to all addresses
4124  */
4125 int
4126 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4127 {
4128         struct sctp_laddr *laddr;
4129         int fnd, error;
4130
4131         fnd = 0;
4132
4133         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4134                 /* You are already bound to all. You have it already */
4135                 return (0);
4136         }
4137         if (ifa->address.sa.sa_family == AF_INET6) {
4138                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4139                         /* Can't bind a non-useable addr. */
4140                         return (-1);
4141                 }
4142         }
4143         /* first, is it already present? */
4144         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4145                 if (laddr->ifa == ifa) {
4146                         fnd = 1;
4147                         break;
4148                 }
4149         }
4150
4151         if (fnd == 0) {
4152                 /* Not in the ep list */
4153                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4154                 if (error != 0)
4155                         return (error);
4156                 inp->laddr_count++;
4157                 /* update inp_vflag flags */
4158                 if (ifa->address.sa.sa_family == AF_INET6) {
4159                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4160                 } else if (ifa->address.sa.sa_family == AF_INET) {
4161                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4162                 }
4163         }
4164         return (0);
4165 }
4166
4167
4168 /*
4169  * select a new (hopefully reachable) destination net (should only be used
4170  * when we deleted an ep addr that is the only usable source address to reach
4171  * the destination net)
4172  */
4173 static void
4174 sctp_select_primary_destination(struct sctp_tcb *stcb)
4175 {
4176         struct sctp_nets *net;
4177
4178         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4179                 /* for now, we'll just pick the first reachable one we find */
4180                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4181                         continue;
4182                 if (sctp_destination_is_reachable(stcb,
4183                     (struct sockaddr *)&net->ro._l_addr)) {
4184                         /* found a reachable destination */
4185                         stcb->asoc.primary_destination = net;
4186                 }
4187         }
4188         /* I can't there from here! ...we're gonna die shortly... */
4189 }
4190
4191
4192 /*
4193  * Delete the address from the endpoint local address list There is nothing
4194  * to be done if we are bound to all addresses
4195  */
4196 int
4197 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4198 {
4199         struct sctp_laddr *laddr;
4200         int fnd;
4201
4202         fnd = 0;
4203         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4204                 /* You are already bound to all. You have it already */
4205                 return (EINVAL);
4206         }
4207         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4208                 if (laddr->ifa == ifa) {
4209                         fnd = 1;
4210                         break;
4211                 }
4212         }
4213         if (fnd && (inp->laddr_count < 2)) {
4214                 /* can't delete unless there are at LEAST 2 addresses */
4215                 return (-1);
4216         }
4217         if (fnd) {
4218                 /*
4219                  * clean up any use of this address go through our
4220                  * associations and clear any last_used_address that match
4221                  * this one for each assoc, see if a new primary_destination
4222                  * is needed
4223                  */
4224                 struct sctp_tcb *stcb;
4225
4226                 /* clean up "next_addr_touse" */
4227                 if (inp->next_addr_touse == laddr)
4228                         /* delete this address */
4229                         inp->next_addr_touse = NULL;
4230
4231                 /* clean up "last_used_address" */
4232                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4233                         struct sctp_nets *net;
4234
4235                         SCTP_TCB_LOCK(stcb);
4236                         if (stcb->asoc.last_used_address == laddr)
4237                                 /* delete this address */
4238                                 stcb->asoc.last_used_address = NULL;
4239                         /*
4240                          * Now spin through all the nets and purge any ref
4241                          * to laddr
4242                          */
4243                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4244                                 if (net->ro._s_addr &&
4245                                     (net->ro._s_addr->ifa == laddr->ifa)) {
4246                                         /* Yep, purge src address selected */
4247                                         struct rtentry *rt;
4248
4249                                         /* delete this address if cached */
4250                                         rt = net->ro.ro_rt;
4251                                         if (rt != NULL) {
4252                                                 RTFREE(rt);
4253                                                 net->ro.ro_rt = NULL;
4254                                         }
4255                                         sctp_free_ifa(net->ro._s_addr);
4256                                         net->ro._s_addr = NULL;
4257                                         net->src_addr_selected = 0;
4258                                 }
4259                         }
4260                         SCTP_TCB_UNLOCK(stcb);
4261                 }               /* for each tcb */
4262                 /* remove it from the ep list */
4263                 sctp_remove_laddr(laddr);
4264                 inp->laddr_count--;
4265                 /* update inp_vflag flags */
4266                 sctp_update_ep_vflag(inp);
4267         }
4268         return (0);
4269 }
4270
4271 /*
4272  * Add the addr to the TCB local address list For the BOUNDALL or dynamic
4273  * case, this is a "pending" address list (eg. addresses waiting for an
4274  * ASCONF-ACK response) For the subset binding, static case, this is a
4275  * "valid" address list
4276  */
4277 int
4278 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list)
4279 {
4280         struct sctp_inpcb *inp;
4281         struct sctp_laddr *laddr;
4282         struct sctpladdr *list;
4283         int error;
4284
4285         /*
4286          * Assumes TCB is locked.. and possibly the INP. May need to
4287          * confirm/fix that if we need it and is not the case.
4288          */
4289         list = &stcb->asoc.sctp_restricted_addrs;
4290
4291         inp = stcb->sctp_ep;
4292         if (ifa->address.sa.sa_family == AF_INET6) {
4293                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4294                         /* Can't bind a non-existent addr. */
4295                         return (-1);
4296                 }
4297         }
4298         /* does the address already exist? */
4299         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4300                 if (laddr->ifa == ifa) {
4301                         return (-1);
4302                 }
4303         }
4304
4305         /* add to the list */
4306         error = sctp_insert_laddr(list, ifa, 0);
4307         if (error != 0)
4308                 return (error);
4309         return (0);
4310 }
4311
4312 /*
4313  * insert an laddr entry with the given ifa for the desired list
4314  */
4315 int
4316 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4317 {
4318         struct sctp_laddr *laddr;
4319
4320         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4321         if (laddr == NULL) {
4322                 /* out of memory? */
4323                 return (EINVAL);
4324         }
4325         SCTP_INCR_LADDR_COUNT();
4326         bzero(laddr, sizeof(*laddr));
4327         laddr->ifa = ifa;
4328         laddr->action = act;
4329         atomic_add_int(&ifa->refcount, 1);
4330         /* insert it */
4331         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4332
4333         return (0);
4334 }
4335
4336 /*
4337  * Remove an laddr entry from the local address list (on an assoc)
4338  */
4339 void
4340 sctp_remove_laddr(struct sctp_laddr *laddr)
4341 {
4342
4343         /* remove from the list */
4344         LIST_REMOVE(laddr, sctp_nxt_addr);
4345         sctp_free_ifa(laddr->ifa);
4346         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4347         SCTP_DECR_LADDR_COUNT();
4348 }
4349
4350 /*
4351  * Remove an address from the TCB local address list
4352  */
4353 int
4354 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4355 {
4356         struct sctp_inpcb *inp;
4357         struct sctp_laddr *laddr;
4358
4359         /*
4360          * This is called by asconf work. It is assumed that a) The TCB is
4361          * locked and b) The INP is locked. This is true in as much as I can
4362          * trace through the entry asconf code where I did these locks.
4363          * Again, the ASCONF code is a bit different in that it does lock
4364          * the INP during its work often times. This must be since we don't
4365          * want other proc's looking up things while what they are looking
4366          * up is changing :-D
4367          */
4368
4369         inp = stcb->sctp_ep;
4370         /* if subset bound and don't allow ASCONF's, can't delete last */
4371         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4372             (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4373                 if (stcb->asoc.numnets < 2) {
4374                         /* can't delete last address */
4375                         return (-1);
4376                 }
4377         }
4378         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4379                 /* remove the address if it exists */
4380                 if (laddr->ifa == NULL)
4381                         continue;
4382                 if (laddr->ifa == ifa) {
4383                         sctp_remove_laddr(laddr);
4384                         return (0);
4385                 }
4386         }
4387
4388         /* address not found! */
4389         return (-1);
4390 }
4391
4392 static char sctp_pcb_initialized = 0;
4393
4394 /*
4395  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4396  */
4397 /* sysctl */
4398 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4399 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4400
4401 void
4402 sctp_pcb_init()
4403 {
4404         /*
4405          * SCTP initialization for the PCB structures should be called by
4406          * the sctp_init() funciton.
4407          */
4408         int i;
4409
4410         if (sctp_pcb_initialized != 0) {
4411                 /* error I was called twice */
4412                 return;
4413         }
4414         sctp_pcb_initialized = 1;
4415
4416         bzero(&sctpstat, sizeof(struct sctpstat));
4417         SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime);
4418         /* init the empty list of (All) Endpoints */
4419         LIST_INIT(&sctppcbinfo.listhead);
4420
4421         /* init the iterator head */
4422         TAILQ_INIT(&sctppcbinfo.iteratorhead);
4423
4424         /* init the hash table of endpoints */
4425         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4426         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4427         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4428         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
4429             &sctppcbinfo.hashasocmark);
4430         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
4431             &sctppcbinfo.hashmark);
4432         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
4433             &sctppcbinfo.hashtcpmark);
4434         sctppcbinfo.hashtblsize = sctp_hashtblsize;
4435
4436         /* init the small hash table we use to track restarted asoc's */
4437         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
4438             &sctppcbinfo.hashrestartmark);
4439
4440
4441         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
4442             &sctppcbinfo.hashvrfmark);
4443
4444         /* init the zones */
4445         /*
4446          * FIX ME: Should check for NULL returns, but if it does fail we are
4447          * doomed to panic anyways... add later maybe.
4448          */
4449         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4450             sizeof(struct sctp_inpcb), maxsockets);
4451
4452         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4453             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4454
4455         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4456             sizeof(struct sctp_laddr),
4457             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4458
4459         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4460             sizeof(struct sctp_nets),
4461             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4462
4463         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4464             sizeof(struct sctp_tmit_chunk),
4465             (sctp_max_number_of_assoc * sctp_chunkscale));
4466
4467         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4468             sizeof(struct sctp_queued_to_read),
4469             (sctp_max_number_of_assoc * sctp_chunkscale));
4470
4471         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4472             sizeof(struct sctp_stream_queue_pending),
4473             (sctp_max_number_of_assoc * sctp_chunkscale));
4474
4475         /* Master Lock INIT for info structure */
4476         SCTP_INP_INFO_LOCK_INIT();
4477         SCTP_STATLOG_INIT_LOCK();
4478         SCTP_ITERATOR_LOCK_INIT();
4479
4480         SCTP_IPI_COUNT_INIT();
4481         SCTP_IPI_ADDR_INIT();
4482         SCTP_IPI_ITERATOR_WQ_INIT();
4483
4484         LIST_INIT(&sctppcbinfo.addr_wq);
4485
4486         /* not sure if we need all the counts */
4487         sctppcbinfo.ipi_count_ep = 0;
4488         /* assoc/tcb zone info */
4489         sctppcbinfo.ipi_count_asoc = 0;
4490         /* local addrlist zone info */
4491         sctppcbinfo.ipi_count_laddr = 0;
4492         /* remote addrlist zone info */
4493         sctppcbinfo.ipi_count_raddr = 0;
4494         /* chunk info */
4495         sctppcbinfo.ipi_count_chunk = 0;
4496
4497         /* socket queue zone info */
4498         sctppcbinfo.ipi_count_readq = 0;
4499
4500         /* stream out queue cont */
4501         sctppcbinfo.ipi_count_strmoq = 0;
4502
4503         sctppcbinfo.ipi_free_strmoq = 0;
4504         sctppcbinfo.ipi_free_chunks = 0;
4505
4506         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
4507
4508         /* Init the TIMEWAIT list */
4509         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4510                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4511         }
4512
4513 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
4514         sctppcbinfo.iterator_running = 0;
4515         sctp_startup_iterator();
4516 #endif
4517
4518         /*
4519          * INIT the default VRF which for BSD is the only one, other O/S's
4520          * may have more. But initially they must start with one and then
4521          * add the VRF's as addresses are added.
4522          */
4523         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
4524
4525 }
4526
4527
4528 int
4529 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4530     int iphlen, int offset, int limit, struct sctphdr *sh,
4531     struct sockaddr *altsa)
4532 {
4533         /*
4534          * grub through the INIT pulling addresses and loading them to the
4535          * nets structure in the asoc. The from address in the mbuf should
4536          * also be loaded (if it is not already). This routine can be called
4537          * with either INIT or INIT-ACK's as long as the m points to the IP
4538          * packet and the offset points to the beginning of the parameters.
4539          */
4540         struct sctp_inpcb *inp, *l_inp;
4541         struct sctp_nets *net, *net_tmp;
4542         struct ip *iph;
4543         struct sctp_paramhdr *phdr, parm_buf;
4544         struct sctp_tcb *stcb_tmp;
4545         uint16_t ptype, plen;
4546         struct sockaddr *sa;
4547         struct sockaddr_storage dest_store;
4548         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4549         struct sockaddr_in sin;
4550         struct sockaddr_in6 sin6;
4551         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
4552         struct sctp_auth_random *p_random = NULL;
4553         uint16_t random_len = 0;
4554         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
4555         struct sctp_auth_hmac_algo *hmacs = NULL;
4556         uint16_t hmacs_len = 0;
4557         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
4558         struct sctp_auth_chunk_list *chunks = NULL;
4559         uint16_t num_chunks = 0;
4560         sctp_key_t *new_key;
4561         uint32_t keylen;
4562         int got_random = 0, got_hmacs = 0, got_chklist = 0;
4563
4564         /* First get the destination address setup too. */
4565         memset(&sin, 0, sizeof(sin));
4566         memset(&sin6, 0, sizeof(sin6));
4567
4568         sin.sin_family = AF_INET;
4569         sin.sin_len = sizeof(sin);
4570         sin.sin_port = stcb->rport;
4571
4572         sin6.sin6_family = AF_INET6;
4573         sin6.sin6_len = sizeof(struct sockaddr_in6);
4574         sin6.sin6_port = stcb->rport;
4575         if (altsa == NULL) {
4576                 iph = mtod(m, struct ip *);
4577                 if (iph->ip_v == IPVERSION) {
4578                         /* its IPv4 */
4579                         struct sockaddr_in *sin_2;
4580
4581                         sin_2 = (struct sockaddr_in *)(local_sa);
4582                         memset(sin_2, 0, sizeof(sin));
4583                         sin_2->sin_family = AF_INET;
4584                         sin_2->sin_len = sizeof(sin);
4585                         sin_2->sin_port = sh->dest_port;
4586                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4587                         sin.sin_addr = iph->ip_src;
4588                         sa = (struct sockaddr *)&sin;
4589                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4590                         /* its IPv6 */
4591                         struct ip6_hdr *ip6;
4592                         struct sockaddr_in6 *sin6_2;
4593
4594                         ip6 = mtod(m, struct ip6_hdr *);
4595                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4596                         memset(sin6_2, 0, sizeof(sin6));
4597                         sin6_2->sin6_family = AF_INET6;
4598                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4599                         sin6_2->sin6_port = sh->dest_port;
4600                         sin6.sin6_addr = ip6->ip6_src;
4601                         sa = (struct sockaddr *)&sin6;
4602                 } else {
4603                         sa = NULL;
4604                 }
4605         } else {
4606                 /*
4607                  * For cookies we use the src address NOT from the packet
4608                  * but from the original INIT
4609                  */
4610                 sa = altsa;
4611         }
4612         /* Turn off ECN until we get through all params */
4613         stcb->asoc.ecn_allowed = 0;
4614         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4615                 /* mark all addresses that we have currently on the list */
4616                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4617         }
4618         /* does the source address already exist? if so skip it */
4619         l_inp = inp = stcb->sctp_ep;
4620
4621         atomic_add_int(&stcb->asoc.refcnt, 1);
4622         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4623         atomic_add_int(&stcb->asoc.refcnt, -1);
4624
4625         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4626                 /* we must add the source address */
4627                 /* no scope set here since we have a tcb already. */
4628                 if ((sa->sa_family == AF_INET) &&
4629                     (stcb->asoc.ipv4_addr_legal)) {
4630                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
4631                                 return (-1);
4632                         }
4633                 } else if ((sa->sa_family == AF_INET6) &&
4634                     (stcb->asoc.ipv6_addr_legal)) {
4635                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
4636                                 return (-2);
4637                         }
4638                 }
4639         } else {
4640                 if (net_tmp != NULL && stcb_tmp == stcb) {
4641                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4642                 } else if (stcb_tmp != stcb) {
4643                         /* It belongs to another association? */
4644                         SCTP_TCB_UNLOCK(stcb_tmp);
4645                         return (-3);
4646                 }
4647         }
4648         if (stcb->asoc.state == 0) {
4649                 /* the assoc was freed? */
4650                 return (-4);
4651         }
4652         /* now we must go through each of the params. */
4653         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4654         while (phdr) {
4655                 ptype = ntohs(phdr->param_type);
4656                 plen = ntohs(phdr->param_length);
4657                 /*
4658                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4659                  * (int)plen);
4660                  */
4661                 if (offset + plen > limit) {
4662                         break;
4663                 }
4664                 if (plen == 0) {
4665                         break;
4666                 }
4667                 if (ptype == SCTP_IPV4_ADDRESS) {
4668                         if (stcb->asoc.ipv4_addr_legal) {
4669                                 struct sctp_ipv4addr_param *p4, p4_buf;
4670
4671                                 /* ok get the v4 address and check/add */
4672                                 phdr = sctp_get_next_param(m, offset,
4673                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4674                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4675                                     phdr == NULL) {
4676                                         return (-5);
4677                                 }
4678                                 p4 = (struct sctp_ipv4addr_param *)phdr;
4679                                 sin.sin_addr.s_addr = p4->addr;
4680                                 sa = (struct sockaddr *)&sin;
4681                                 inp = stcb->sctp_ep;
4682                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4683                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4684                                     local_sa, stcb);
4685                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4686
4687                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4688                                     inp == NULL) {
4689                                         /* we must add the source address */
4690                                         /*
4691                                          * no scope set since we have a tcb
4692                                          * already
4693                                          */
4694
4695                                         /*
4696                                          * we must validate the state again
4697                                          * here
4698                                          */
4699                                         if (stcb->asoc.state == 0) {
4700                                                 /* the assoc was freed? */
4701                                                 return (-7);
4702                                         }
4703                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
4704                                                 return (-8);
4705                                         }
4706                                 } else if (stcb_tmp == stcb) {
4707                                         if (stcb->asoc.state == 0) {
4708                                                 /* the assoc was freed? */
4709                                                 return (-10);
4710                                         }
4711                                         if (net != NULL) {
4712                                                 /* clear flag */
4713                                                 net->dest_state &=
4714                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4715                                         }
4716                                 } else {
4717                                         /*
4718                                          * strange, address is in another
4719                                          * assoc? straighten out locks.
4720                                          */
4721                                         if (stcb->asoc.state == 0) {
4722                                                 /* the assoc was freed? */
4723                                                 return (-12);
4724                                         }
4725                                         return (-13);
4726                                 }
4727                         }
4728                 } else if (ptype == SCTP_IPV6_ADDRESS) {
4729                         if (stcb->asoc.ipv6_addr_legal) {
4730                                 /* ok get the v6 address and check/add */
4731                                 struct sctp_ipv6addr_param *p6, p6_buf;
4732
4733                                 phdr = sctp_get_next_param(m, offset,
4734                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4735                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4736                                     phdr == NULL) {
4737                                         return (-14);
4738                                 }
4739                                 p6 = (struct sctp_ipv6addr_param *)phdr;
4740                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4741                                     sizeof(p6->addr));
4742                                 sa = (struct sockaddr *)&sin6;
4743                                 inp = stcb->sctp_ep;
4744                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4745                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4746                                     local_sa, stcb);
4747                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4748                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4749                                     inp == NULL)) {
4750                                         /*
4751                                          * we must validate the state again
4752                                          * here
4753                                          */
4754                                         if (stcb->asoc.state == 0) {
4755                                                 /* the assoc was freed? */
4756                                                 return (-16);
4757                                         }
4758                                         /*
4759                                          * we must add the address, no scope
4760                                          * set
4761                                          */
4762                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
4763                                                 return (-17);
4764                                         }
4765                                 } else if (stcb_tmp == stcb) {
4766                                         /*
4767                                          * we must validate the state again
4768                                          * here
4769                                          */
4770                                         if (stcb->asoc.state == 0) {
4771                                                 /* the assoc was freed? */
4772                                                 return (-19);
4773                                         }
4774                                         if (net != NULL) {
4775                                                 /* clear flag */
4776                                                 net->dest_state &=
4777                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4778                                         }
4779                                 } else {
4780                                         /*
4781                                          * strange, address is in another
4782                                          * assoc? straighten out locks.
4783                                          */
4784                                         if (stcb->asoc.state == 0) {
4785                                                 /* the assoc was freed? */
4786                                                 return (-21);
4787                                         }
4788                                         return (-22);
4789                                 }
4790                         }
4791                 } else if (ptype == SCTP_ECN_CAPABLE) {
4792                         stcb->asoc.ecn_allowed = 1;
4793                 } else if (ptype == SCTP_ULP_ADAPTATION) {
4794                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4795                                 struct sctp_adaptation_layer_indication ai,
4796                                                                 *aip;
4797
4798                                 phdr = sctp_get_next_param(m, offset,
4799                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
4800                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
4801                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
4802                                     stcb, ntohl(aip->indication), NULL);
4803                         }
4804                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4805                         struct sctp_asconf_addr_param lstore, *fee;
4806                         struct sctp_asconf_addrv4_param *fii;
4807                         int lptype;
4808                         struct sockaddr *lsa = NULL;
4809
4810                         stcb->asoc.peer_supports_asconf = 1;
4811                         if (plen > sizeof(lstore)) {
4812                                 return (-23);
4813                         }
4814                         phdr = sctp_get_next_param(m, offset,
4815                             (struct sctp_paramhdr *)&lstore, plen);
4816                         if (phdr == NULL) {
4817                                 return (-24);
4818                         }
4819                         fee = (struct sctp_asconf_addr_param *)phdr;
4820                         lptype = ntohs(fee->addrp.ph.param_type);
4821                         if (lptype == SCTP_IPV4_ADDRESS) {
4822                                 if (plen !=
4823                                     sizeof(struct sctp_asconf_addrv4_param)) {
4824                                         printf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4825                                             (int)sizeof(struct sctp_asconf_addrv4_param),
4826                                             plen);
4827                                 } else {
4828                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4829                                         sin.sin_addr.s_addr = fii->addrp.addr;
4830                                         lsa = (struct sockaddr *)&sin;
4831                                 }
4832                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4833                                 if (plen !=
4834                                     sizeof(struct sctp_asconf_addr_param)) {
4835                                         printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4836                                             (int)sizeof(struct sctp_asconf_addr_param),
4837                                             plen);
4838                                 } else {
4839                                         memcpy(sin6.sin6_addr.s6_addr,
4840                                             fee->addrp.addr,
4841                                             sizeof(fee->addrp.addr));
4842                                         lsa = (struct sockaddr *)&sin6;
4843                                 }
4844                         }
4845                         if (lsa) {
4846                                 sctp_set_primary_addr(stcb, sa, NULL);
4847                         }
4848                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4849                         /* Peer supports pr-sctp */
4850                         stcb->asoc.peer_supports_prsctp = 1;
4851                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4852                         /* A supported extension chunk */
4853                         struct sctp_supported_chunk_types_param *pr_supported;
4854                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
4855                         int num_ent, i;
4856
4857                         phdr = sctp_get_next_param(m, offset,
4858                             (struct sctp_paramhdr *)&local_store, plen);
4859                         if (phdr == NULL) {
4860                                 return (-25);
4861                         }
4862                         stcb->asoc.peer_supports_asconf = 0;
4863                         stcb->asoc.peer_supports_prsctp = 0;
4864                         stcb->asoc.peer_supports_pktdrop = 0;
4865                         stcb->asoc.peer_supports_strreset = 0;
4866                         stcb->asoc.peer_supports_auth = 0;
4867                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4868                         num_ent = plen - sizeof(struct sctp_paramhdr);
4869                         for (i = 0; i < num_ent; i++) {
4870                                 switch (pr_supported->chunk_types[i]) {
4871                                 case SCTP_ASCONF:
4872                                 case SCTP_ASCONF_ACK:
4873                                         stcb->asoc.peer_supports_asconf = 1;
4874                                         break;
4875                                 case SCTP_FORWARD_CUM_TSN:
4876                                         stcb->asoc.peer_supports_prsctp = 1;
4877                                         break;
4878                                 case SCTP_PACKET_DROPPED:
4879                                         stcb->asoc.peer_supports_pktdrop = 1;
4880                                         break;
4881                                 case SCTP_STREAM_RESET:
4882                                         stcb->asoc.peer_supports_strreset = 1;
4883                                         break;
4884                                 case SCTP_AUTHENTICATION:
4885                                         stcb->asoc.peer_supports_auth = 1;
4886                                         break;
4887                                 default:
4888                                         /* one I have not learned yet */
4889                                         break;
4890
4891                                 }
4892                         }
4893                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4894                         /* Peer supports ECN-nonce */
4895                         stcb->asoc.peer_supports_ecn_nonce = 1;
4896                         stcb->asoc.ecn_nonce_allowed = 1;
4897                 } else if (ptype == SCTP_RANDOM) {
4898                         if (plen > sizeof(random_store))
4899                                 break;
4900                         if (got_random) {
4901                                 /* already processed a RANDOM */
4902                                 goto next_param;
4903                         }
4904                         phdr = sctp_get_next_param(m, offset,
4905                             (struct sctp_paramhdr *)random_store,
4906                             plen);
4907                         if (phdr == NULL)
4908                                 return (-26);
4909                         p_random = (struct sctp_auth_random *)phdr;
4910                         random_len = plen - sizeof(*p_random);
4911                         /* enforce the random length */
4912                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
4913 #ifdef SCTP_DEBUG
4914                                 if (sctp_debug_on & SCTP_DEBUG_AUTH1)
4915                                         printf("SCTP: invalid RANDOM len\n");
4916 #endif
4917                                 return (-27);
4918                         }
4919                         got_random = 1;
4920                 } else if (ptype == SCTP_HMAC_LIST) {
4921                         int num_hmacs;
4922                         int i;
4923
4924                         if (plen > sizeof(hmacs_store))
4925                                 break;
4926                         if (got_hmacs) {
4927                                 /* already processed a HMAC list */
4928                                 goto next_param;
4929                         }
4930                         phdr = sctp_get_next_param(m, offset,
4931                             (struct sctp_paramhdr *)hmacs_store,
4932                             plen);
4933                         if (phdr == NULL)
4934                                 return (-28);
4935                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
4936                         hmacs_len = plen - sizeof(*hmacs);
4937                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
4938                         /* validate the hmac list */
4939                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
4940                                 return (-29);
4941                         }
4942                         if (stcb->asoc.peer_hmacs != NULL)
4943                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
4944                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
4945                         if (stcb->asoc.peer_hmacs != NULL) {
4946                                 for (i = 0; i < num_hmacs; i++) {
4947                                         sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
4948                                             ntohs(hmacs->hmac_ids[i]));
4949                                 }
4950                         }
4951                         got_hmacs = 1;
4952                 } else if (ptype == SCTP_CHUNK_LIST) {
4953                         int i;
4954
4955                         if (plen > sizeof(chunks_store))
4956                                 break;
4957                         if (got_chklist) {
4958                                 /* already processed a Chunks list */
4959                                 goto next_param;
4960                         }
4961                         phdr = sctp_get_next_param(m, offset,
4962                             (struct sctp_paramhdr *)chunks_store,
4963                             plen);
4964                         if (phdr == NULL)
4965                                 return (-30);
4966                         chunks = (struct sctp_auth_chunk_list *)phdr;
4967                         num_chunks = plen - sizeof(*chunks);
4968                         if (stcb->asoc.peer_auth_chunks != NULL)
4969                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
4970                         else
4971                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
4972                         for (i = 0; i < num_chunks; i++) {
4973                                 sctp_auth_add_chunk(chunks->chunk_types[i],
4974                                     stcb->asoc.peer_auth_chunks);
4975                         }
4976                         got_chklist = 1;
4977                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4978                             (ptype == SCTP_STATE_COOKIE) ||
4979                             (ptype == SCTP_UNRECOG_PARAM) ||
4980                             (ptype == SCTP_COOKIE_PRESERVE) ||
4981                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4982                             (ptype == SCTP_ADD_IP_ADDRESS) ||
4983                             (ptype == SCTP_DEL_IP_ADDRESS) ||
4984                             (ptype == SCTP_ERROR_CAUSE_IND) ||
4985                     (ptype == SCTP_SUCCESS_REPORT)) {
4986                          /* don't care */ ;
4987                 } else {
4988                         if ((ptype & 0x8000) == 0x0000) {
4989                                 /*
4990                                  * must stop processing the rest of the
4991                                  * param's. Any report bits were handled
4992                                  * with the call to
4993                                  * sctp_arethere_unrecognized_parameters()
4994                                  * when the INIT or INIT-ACK was first seen.
4995                                  */
4996                                 break;
4997                         }
4998                 }
4999 next_param:
5000                 offset += SCTP_SIZE32(plen);
5001                 if (offset >= limit) {
5002                         break;
5003                 }
5004                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5005                     sizeof(parm_buf));
5006         }
5007         /* Now check to see if we need to purge any addresses */
5008         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5009                 net_tmp = TAILQ_NEXT(net, sctp_next);
5010                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5011                     SCTP_ADDR_NOT_IN_ASSOC) {
5012                         /* This address has been removed from the asoc */
5013                         /* remove and free it */
5014                         stcb->asoc.numnets--;
5015                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5016                         sctp_free_remote_addr(net);
5017                         if (net == stcb->asoc.primary_destination) {
5018                                 stcb->asoc.primary_destination = NULL;
5019                                 sctp_select_primary_destination(stcb);
5020                         }
5021                 }
5022         }
5023         /* validate authentication required parameters */
5024         if (got_random && got_hmacs) {
5025                 stcb->asoc.peer_supports_auth = 1;
5026         } else {
5027                 stcb->asoc.peer_supports_auth = 0;
5028         }
5029         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5030                 /* peer does not support auth but sent a chunks list? */
5031                 return (-31);
5032         }
5033         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5034             !stcb->asoc.peer_supports_auth) {
5035                 /* peer supports asconf but not auth? */
5036                 return (-32);
5037         }
5038         /* concatenate the full random key */
5039 #ifdef SCTP_AUTH_DRAFT_04
5040         keylen = random_len;
5041         new_key = sctp_alloc_key(keylen);
5042         if (new_key != NULL) {
5043                 /* copy in the RANDOM */
5044                 if (p_random != NULL)
5045                         bcopy(p_random->random_data, new_key->key, random_len);
5046         }
5047 #else
5048         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5049             sizeof(*hmacs) + hmacs_len;
5050         new_key = sctp_alloc_key(keylen);
5051         if (new_key != NULL) {
5052                 /* copy in the RANDOM */
5053                 if (p_random != NULL) {
5054                         keylen = sizeof(*p_random) + random_len;
5055                         bcopy(p_random, new_key->key, keylen);
5056                 }
5057                 /* append in the AUTH chunks */
5058                 if (chunks != NULL) {
5059                         bcopy(chunks, new_key->key + keylen,
5060                             sizeof(*chunks) + num_chunks);
5061                         keylen += sizeof(*chunks) + num_chunks;
5062                 }
5063                 /* append in the HMACs */
5064                 if (hmacs != NULL) {
5065                         bcopy(hmacs, new_key->key + keylen,
5066                             sizeof(*hmacs) + hmacs_len);
5067                 }
5068         }
5069 #endif
5070         else {
5071                 /* failed to get memory for the key */
5072                 return (-33);
5073         }
5074         if (stcb->asoc.authinfo.peer_random != NULL)
5075                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5076         stcb->asoc.authinfo.peer_random = new_key;
5077 #ifdef SCTP_AUTH_DRAFT_04
5078         /* don't include the chunks and hmacs for draft -04 */
5079         stcb->asoc.authinfo.peer_random->keylen = random_len;
5080 #endif
5081         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5082         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5083
5084         return (0);
5085 }
5086
5087 int
5088 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5089     struct sctp_nets *net)
5090 {
5091         /* make sure the requested primary address exists in the assoc */
5092         if (net == NULL && sa)
5093                 net = sctp_findnet(stcb, sa);
5094
5095         if (net == NULL) {
5096                 /* didn't find the requested primary address! */
5097                 return (-1);
5098         } else {
5099                 /* set the primary address */
5100                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5101                         /* Must be confirmed, so queue to set */
5102                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5103                         return (0);
5104                 }
5105                 stcb->asoc.primary_destination = net;
5106                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5107                 net = TAILQ_FIRST(&stcb->asoc.nets);
5108                 if (net != stcb->asoc.primary_destination) {
5109                         /*
5110                          * first one on the list is NOT the primary
5111                          * sctp_cmpaddr() is much more efficent if the
5112                          * primary is the first on the list, make it so.
5113                          */
5114                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5115                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5116                 }
5117                 return (0);
5118         }
5119 }
5120
5121
5122 int
5123 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
5124 {
5125         /*
5126          * This function serves two purposes. It will see if a TAG can be
5127          * re-used and return 1 for yes it is ok and 0 for don't use that
5128          * tag. A secondary function it will do is purge out old tags that
5129          * can be removed.
5130          */
5131         struct sctpasochead *head;
5132         struct sctpvtaghead *chain;
5133         struct sctp_tagblock *twait_block;
5134         struct sctp_tcb *stcb;
5135         int i;
5136
5137         SCTP_INP_INFO_WLOCK();
5138         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5139         /* First is the vtag in use ? */
5140
5141         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5142             sctppcbinfo.hashasocmark)];
5143         if (head == NULL) {
5144                 goto check_restart;
5145         }
5146         LIST_FOREACH(stcb, head, sctp_asocs) {
5147
5148                 if (stcb->asoc.my_vtag == tag) {
5149                         /*
5150                          * We should remove this if and return 0 always if
5151                          * we want vtags unique across all endpoints. For
5152                          * now within a endpoint is ok.
5153                          */
5154                         if (inp == stcb->sctp_ep) {
5155                                 /* bad tag, in use */
5156                                 SCTP_INP_INFO_WUNLOCK();
5157                                 return (0);
5158                         }
5159                 }
5160         }
5161 check_restart:
5162         /* Now lets check the restart hash */
5163         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5164             sctppcbinfo.hashrestartmark)];
5165         if (head == NULL) {
5166                 goto check_time_wait;
5167         }
5168         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5169                 if (stcb->asoc.assoc_id == tag) {
5170                         /* candidate */
5171                         if (inp == stcb->sctp_ep) {
5172                                 /* bad tag, in use */
5173                                 SCTP_INP_INFO_WUNLOCK();
5174                                 return (0);
5175                         }
5176                 }
5177         }
5178 check_time_wait:
5179         /* Now what about timed wait ? */
5180         if (!SCTP_LIST_EMPTY(chain)) {
5181                 /*
5182                  * Block(s) are present, lets see if we have this tag in the
5183                  * list
5184                  */
5185                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5186                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5187                                 if (twait_block->vtag_block[i].v_tag == 0) {
5188                                         /* not used */
5189                                         continue;
5190                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
5191                                     now->tv_sec) {
5192                                         /* Audit expires this guy */
5193                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
5194                                         twait_block->vtag_block[i].v_tag = 0;
5195                                 } else if (twait_block->vtag_block[i].v_tag ==
5196                                     tag) {
5197                                         /* Bad tag, sorry :< */
5198                                         SCTP_INP_INFO_WUNLOCK();
5199                                         return (0);
5200                                 }
5201                         }
5202                 }
5203         }
5204         /* Not found, ok to use the tag */
5205         SCTP_INP_INFO_WUNLOCK();
5206         return (1);
5207 }
5208
5209
5210 static sctp_assoc_t reneged_asoc_ids[256];
5211 static uint8_t reneged_at = 0;
5212
5213
5214 static void
5215 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5216 {
5217         /*
5218          * We must hunt this association for MBUF's past the cumack (i.e.
5219          * out of order data that we can renege on).
5220          */
5221         struct sctp_association *asoc;
5222         struct sctp_tmit_chunk *chk, *nchk;
5223         uint32_t cumulative_tsn_p1, tsn;
5224         struct sctp_queued_to_read *ctl, *nctl;
5225         int cnt, strmat, gap;
5226
5227         /* We look for anything larger than the cum-ack + 1 */
5228
5229         SCTP_STAT_INCR(sctps_protocol_drain_calls);
5230         if (sctp_do_drain == 0) {
5231                 return;
5232         }
5233         asoc = &stcb->asoc;
5234         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5235                 /* none we can reneg on. */
5236                 return;
5237         }
5238         SCTP_STAT_INCR(sctps_protocol_drains_done);
5239         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5240         cnt = 0;
5241         /* First look in the re-assembly queue */
5242         chk = TAILQ_FIRST(&asoc->reasmqueue);
5243         while (chk) {
5244                 /* Get the next one */
5245                 nchk = TAILQ_NEXT(chk, sctp_next);
5246                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5247                     cumulative_tsn_p1, MAX_TSN)) {
5248                         /* Yep it is above cum-ack */
5249                         cnt++;
5250                         tsn = chk->rec.data.TSN_seq;
5251                         if (tsn >= asoc->mapping_array_base_tsn) {
5252                                 gap = tsn - asoc->mapping_array_base_tsn;
5253                         } else {
5254                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5255                                     tsn + 1;
5256                         }
5257                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5258                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5259                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5260                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5261                         if (chk->data) {
5262                                 sctp_m_freem(chk->data);
5263                                 chk->data = NULL;
5264                         }
5265                         sctp_free_remote_addr(chk->whoTo);
5266                         sctp_free_a_chunk(stcb, chk);
5267                 }
5268                 chk = nchk;
5269         }
5270         /* Ok that was fun, now we will drain all the inbound streams? */
5271         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5272                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5273                 while (ctl) {
5274                         nctl = TAILQ_NEXT(ctl, next);
5275                         if (compare_with_wrap(ctl->sinfo_tsn,
5276                             cumulative_tsn_p1, MAX_TSN)) {
5277                                 /* Yep it is above cum-ack */
5278                                 cnt++;
5279                                 tsn = ctl->sinfo_tsn;
5280                                 if (tsn >= asoc->mapping_array_base_tsn) {
5281                                         gap = tsn -
5282                                             asoc->mapping_array_base_tsn;
5283                                 } else {
5284                                         gap = (MAX_TSN -
5285                                             asoc->mapping_array_base_tsn) +
5286                                             tsn + 1;
5287                                 }
5288                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5289                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5290
5291                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5292                                     gap);
5293                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5294                                     ctl, next);
5295                                 if (ctl->data) {
5296                                         sctp_m_freem(ctl->data);
5297                                         ctl->data = NULL;
5298                                 }
5299                                 sctp_free_remote_addr(ctl->whoFrom);
5300                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5301                                 SCTP_DECR_READQ_COUNT();
5302                         }
5303                         ctl = nctl;
5304                 }
5305         }
5306         /*
5307          * Question, should we go through the delivery queue? The only
5308          * reason things are on here is the app not reading OR a p-d-api up.
5309          * An attacker COULD send enough in to initiate the PD-API and then
5310          * send a bunch of stuff to other streams... these would wind up on
5311          * the delivery queue.. and then we would not get to them. But in
5312          * order to do this I then have to back-track and un-deliver
5313          * sequence numbers in streams.. el-yucko. I think for now we will
5314          * NOT look at the delivery queue and leave it to be something to
5315          * consider later. An alternative would be to abort the P-D-API with
5316          * a notification and then deliver the data.... Or another method
5317          * might be to keep track of how many times the situation occurs and
5318          * if we see a possible attack underway just abort the association.
5319          */
5320 #ifdef SCTP_DEBUG
5321         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
5322                 if (cnt) {
5323                         printf("Freed %d chunks from reneg harvest\n", cnt);
5324                 }
5325         }
5326 #endif                          /* SCTP_DEBUG */
5327         if (cnt) {
5328                 /*
5329                  * Now do we need to find a new
5330                  * asoc->highest_tsn_inside_map?
5331                  */
5332                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
5333                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
5334                 } else {
5335                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5336                             asoc->highest_tsn_inside_map + 1;
5337                 }
5338                 if (gap >= (asoc->mapping_array_size << 3)) {
5339                         /*
5340                          * Something bad happened or cum-ack and high were
5341                          * behind the base, but if so earlier checks should
5342                          * have found NO data... wierd... we will start at
5343                          * end of mapping array.
5344                          */
5345                         printf("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
5346                             (int)gap,
5347                             (int)(asoc->mapping_array_size << 3),
5348                             (int)asoc->highest_tsn_inside_map);
5349                         gap = asoc->mapping_array_size << 3;
5350                 }
5351                 while (gap > 0) {
5352                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
5353                                 /* found the new highest */
5354                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
5355                                 break;
5356                         }
5357                         gap--;
5358                 }
5359                 if (gap == 0) {
5360                         /* Nothing left in map */
5361                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
5362                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
5363                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
5364                 }
5365                 asoc->last_revoke_count = cnt;
5366                 SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
5367                 sctp_send_sack(stcb);
5368                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN);
5369                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
5370                 reneged_at++;
5371         }
5372         /*
5373          * Another issue, in un-setting the TSN's in the mapping array we
5374          * DID NOT adjust the higest_tsn marker.  This will cause one of two
5375          * things to occur. It may cause us to do extra work in checking for
5376          * our mapping array movement. More importantly it may cause us to
5377          * SACK every datagram. This may not be a bad thing though since we
5378          * will recover once we get our cum-ack above and all this stuff we
5379          * dumped recovered.
5380          */
5381 }
5382
5383 void
5384 sctp_drain()
5385 {
5386         /*
5387          * We must walk the PCB lists for ALL associations here. The system
5388          * is LOW on MBUF's and needs help. This is where reneging will
5389          * occur. We really hope this does NOT happen!
5390          */
5391         struct sctp_inpcb *inp;
5392         struct sctp_tcb *stcb;
5393
5394         SCTP_INP_INFO_RLOCK();
5395         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
5396                 /* For each endpoint */
5397                 SCTP_INP_RLOCK(inp);
5398                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5399                         /* For each association */
5400                         SCTP_TCB_LOCK(stcb);
5401                         sctp_drain_mbufs(inp, stcb);
5402                         SCTP_TCB_UNLOCK(stcb);
5403                 }
5404                 SCTP_INP_RUNLOCK(inp);
5405         }
5406         SCTP_INP_INFO_RUNLOCK();
5407 }
5408
5409 /*
5410  * start a new iterator
5411  * iterates through all endpoints and associations based on the pcb_state
5412  * flags and asoc_state.  "af" (mandatory) is executed for all matching
5413  * assocs and "ef" (optional) is executed when the iterator completes.
5414  * "inpf" (optional) is executed for each new endpoint as it is being
5415  * iterated through. inpe (optional) is called when the inp completes
5416  * its way through all the stcbs.
5417  */
5418 int
5419 sctp_initiate_iterator(inp_func inpf,
5420     asoc_func af,
5421     inp_func inpe,
5422     uint32_t pcb_state,
5423     uint32_t pcb_features,
5424     uint32_t asoc_state,
5425     void *argp,
5426     uint32_t argi,
5427     end_func ef,
5428     struct sctp_inpcb *s_inp,
5429     uint8_t chunk_output_off)
5430 {
5431         struct sctp_iterator *it = NULL;
5432
5433         if (af == NULL) {
5434                 return (-1);
5435         }
5436         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
5437             "Iterator");
5438         if (it == NULL) {
5439                 return (ENOMEM);
5440         }
5441         memset(it, 0, sizeof(*it));
5442         it->function_assoc = af;
5443         it->function_inp = inpf;
5444         if (inpf)
5445                 it->done_current_ep = 0;
5446         else
5447                 it->done_current_ep = 1;
5448         it->function_atend = ef;
5449         it->pointer = argp;
5450         it->val = argi;
5451         it->pcb_flags = pcb_state;
5452         it->pcb_features = pcb_features;
5453         it->asoc_state = asoc_state;
5454         it->function_inp_end = inpe;
5455         it->no_chunk_output = chunk_output_off;
5456         if (s_inp) {
5457                 it->inp = s_inp;
5458                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5459         } else {
5460                 SCTP_INP_INFO_RLOCK();
5461                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5462
5463                 SCTP_INP_INFO_RUNLOCK();
5464                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5465
5466         }
5467         SCTP_IPI_ITERATOR_WQ_LOCK();
5468         if (it->inp)
5469                 SCTP_INP_INCR_REF(it->inp);
5470         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5471 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5472         if (sctppcbinfo.iterator_running == 0) {
5473                 sctp_wakeup_iterator();
5474         }
5475         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5476 #else
5477         if (it->inp)
5478                 SCTP_INP_DECR_REF(it->inp);
5479         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5480         /* Init the timer */
5481         SCTP_OS_TIMER_INIT(&it->tmr.timer);
5482         /* add to the list of all iterators */
5483         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
5484             NULL, NULL);
5485 #endif
5486         return (0);
5487 }