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 = NULL;
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(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                 /* Its only abandoned if it had data left */
2693                 if (sq->length)
2694                         SCTP_STAT_INCR(sctps_left_abandon);
2695
2696                 TAILQ_REMOVE(&inp->read_queue, sq, next);
2697                 sctp_free_remote_addr(sq->whoFrom);
2698                 if (so)
2699                         so->so_rcv.sb_cc -= sq->length;
2700                 if (sq->data) {
2701                         sctp_m_freem(sq->data);
2702                         sq->data = NULL;
2703                 }
2704                 /*
2705                  * no need to free the net count, since at this point all
2706                  * assoc's are gone.
2707                  */
2708                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2709                 SCTP_DECR_READQ_COUNT();
2710         }
2711         /* Now the sctp_pcb things */
2712         /*
2713          * free each asoc if it is not already closed/free. we can't use the
2714          * macro here since le_next will get freed as part of the
2715          * sctp_free_assoc() call.
2716          */
2717         cnt = 0;
2718         if (so) {
2719 #ifdef IPSEC
2720                 ipsec4_delete_pcbpolicy(ip_pcb);
2721 #endif                          /* IPSEC */
2722
2723                 /* Unlocks not needed since the socket is gone now */
2724         }
2725         if (ip_pcb->inp_options) {
2726                 (void)sctp_m_free(ip_pcb->inp_options);
2727                 ip_pcb->inp_options = 0;
2728         }
2729         if (ip_pcb->inp_moptions) {
2730                 ip_freemoptions(ip_pcb->inp_moptions);
2731                 ip_pcb->inp_moptions = 0;
2732         }
2733 #ifdef INET6
2734         if (ip_pcb->inp_vflag & INP_IPV6) {
2735                 struct in6pcb *in6p;
2736
2737                 in6p = (struct in6pcb *)inp;
2738                 ip6_freepcbopts(in6p->in6p_outputopts);
2739         }
2740 #endif                          /* INET6 */
2741         ip_pcb->inp_vflag = 0;
2742         /* free up authentication fields */
2743         if (inp->sctp_ep.local_auth_chunks != NULL)
2744                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2745         if (inp->sctp_ep.local_hmacs != NULL)
2746                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2747
2748         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2749         while (shared_key) {
2750                 LIST_REMOVE(shared_key, next);
2751                 sctp_free_sharedkey(shared_key);
2752                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2753         }
2754
2755         inp_save = LIST_NEXT(inp, sctp_list);
2756         LIST_REMOVE(inp, sctp_list);
2757
2758         /* fix any iterators only after out of the list */
2759         sctp_iterator_inp_being_freed(inp, inp_save);
2760         /*
2761          * if we have an address list the following will free the list of
2762          * ifaddr's that are set into this ep. Again macro limitations here,
2763          * since the LIST_FOREACH could be a bad idea.
2764          */
2765         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2766             laddr = nladdr) {
2767                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2768                 sctp_remove_laddr(laddr);
2769         }
2770
2771 #ifdef SCTP_TRACK_FREED_ASOCS
2772         /* TEMP CODE */
2773         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
2774             asoc = nasoc) {
2775                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2776                 LIST_REMOVE(asoc, sctp_tcblist);
2777                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
2778                 SCTP_DECR_ASOC_COUNT();
2779         }
2780         /* *** END TEMP CODE *** */
2781 #endif
2782         /* Now lets see about freeing the EP hash table. */
2783         if (inp->sctp_tcbhash != NULL) {
2784                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2785                 inp->sctp_tcbhash = NULL;
2786         }
2787         /* Now we must put the ep memory back into the zone pool */
2788         SCTP_INP_LOCK_DESTROY(inp);
2789         SCTP_INP_READ_DESTROY(inp);
2790         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2791         SCTP_INP_INFO_WUNLOCK();
2792
2793         SCTP_ITERATOR_UNLOCK();
2794
2795         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2796         SCTP_DECR_EP_COUNT();
2797
2798 }
2799
2800
2801 struct sctp_nets *
2802 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2803 {
2804         struct sctp_nets *net;
2805
2806         /* locate the address */
2807         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2808                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2809                         return (net);
2810         }
2811         return (NULL);
2812 }
2813
2814
2815 /*
2816  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2817  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2818  * stats of stuff.
2819  */
2820 int
2821 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
2822 {
2823         struct sctp_ifa *sctp_ifa;
2824
2825         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0);
2826         if (sctp_ifa) {
2827                 return (1);
2828         } else {
2829                 return (0);
2830         }
2831 }
2832
2833 void
2834 sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net)
2835 {
2836         net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND));
2837         /* we always get at LEAST 2 MTU's */
2838         if (net->cwnd < (2 * net->mtu)) {
2839                 net->cwnd = 2 * net->mtu;
2840         }
2841         net->ssthresh = stcb->asoc.peers_rwnd;
2842 }
2843
2844
2845 int
2846 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2847     int set_scope, int from)
2848 {
2849         /*
2850          * The following is redundant to the same lines in the
2851          * sctp_aloc_assoc() but is needed since other's call the add
2852          * address function
2853          */
2854         struct sctp_nets *net, *netfirst;
2855         int addr_inscope;
2856
2857 #ifdef SCTP_DEBUG
2858         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
2859                 printf("Adding an address (from:%d) to the peer: ", from);
2860                 sctp_print_address(newaddr);
2861         }
2862 #endif
2863
2864         netfirst = sctp_findnet(stcb, newaddr);
2865         if (netfirst) {
2866                 /*
2867                  * Lie and return ok, we don't want to make the association
2868                  * go away for this behavior. It will happen in the TCP
2869                  * model in a connected socket. It does not reach the hash
2870                  * table until after the association is built so it can't be
2871                  * found. Mark as reachable, since the initial creation will
2872                  * have been cleared and the NOT_IN_ASSOC flag will have
2873                  * been added... and we don't want to end up removing it
2874                  * back out.
2875                  */
2876                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2877                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
2878                             SCTP_ADDR_UNCONFIRMED);
2879                 } else {
2880                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2881                 }
2882
2883                 return (0);
2884         }
2885         addr_inscope = 1;
2886         if (newaddr->sa_family == AF_INET) {
2887                 struct sockaddr_in *sin;
2888
2889                 sin = (struct sockaddr_in *)newaddr;
2890                 if (sin->sin_addr.s_addr == 0) {
2891                         /* Invalid address */
2892                         return (-1);
2893                 }
2894                 /* zero out the bzero area */
2895                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
2896
2897                 /* assure len is set */
2898                 sin->sin_len = sizeof(struct sockaddr_in);
2899                 if (set_scope) {
2900 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
2901                         stcb->ipv4_local_scope = 1;
2902 #else
2903                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
2904                                 stcb->asoc.ipv4_local_scope = 1;
2905                         }
2906 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
2907                 } else {
2908                         /* Validate the address is in scope */
2909                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
2910                             (stcb->asoc.ipv4_local_scope == 0)) {
2911                                 addr_inscope = 0;
2912                         }
2913                 }
2914         } else if (newaddr->sa_family == AF_INET6) {
2915                 struct sockaddr_in6 *sin6;
2916
2917                 sin6 = (struct sockaddr_in6 *)newaddr;
2918                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2919                         /* Invalid address */
2920                         return (-1);
2921                 }
2922                 /* assure len is set */
2923                 sin6->sin6_len = sizeof(struct sockaddr_in6);
2924                 if (set_scope) {
2925                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
2926                                 stcb->asoc.loopback_scope = 1;
2927                                 stcb->asoc.local_scope = 0;
2928                                 stcb->asoc.ipv4_local_scope = 1;
2929                                 stcb->asoc.site_scope = 1;
2930                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
2931                                 /*
2932                                  * If the new destination is a LINK_LOCAL we
2933                                  * must have common site scope. Don't set
2934                                  * the local scope since we may not share
2935                                  * all links, only loopback can do this.
2936                                  * Links on the local network would also be
2937                                  * on our private network for v4 too.
2938                                  */
2939                                 stcb->asoc.ipv4_local_scope = 1;
2940                                 stcb->asoc.site_scope = 1;
2941                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
2942                                 /*
2943                                  * If the new destination is SITE_LOCAL then
2944                                  * we must have site scope in common.
2945                                  */
2946                                 stcb->asoc.site_scope = 1;
2947                         }
2948                 } else {
2949                         /* Validate the address is in scope */
2950                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
2951                             (stcb->asoc.loopback_scope == 0)) {
2952                                 addr_inscope = 0;
2953                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
2954                             (stcb->asoc.local_scope == 0)) {
2955                                 addr_inscope = 0;
2956                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
2957                             (stcb->asoc.site_scope == 0)) {
2958                                 addr_inscope = 0;
2959                         }
2960                 }
2961         } else {
2962                 /* not supported family type */
2963                 return (-1);
2964         }
2965         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
2966         if (net == NULL) {
2967                 return (-1);
2968         }
2969         SCTP_INCR_RADDR_COUNT();
2970         bzero(net, sizeof(*net));
2971         SCTP_GETTIME_TIMEVAL(&net->start_time);
2972         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
2973         if (newaddr->sa_family == AF_INET) {
2974                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
2975         } else if (newaddr->sa_family == AF_INET6) {
2976                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
2977         }
2978         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
2979         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
2980                 stcb->asoc.loopback_scope = 1;
2981                 stcb->asoc.ipv4_local_scope = 1;
2982                 stcb->asoc.local_scope = 0;
2983                 stcb->asoc.site_scope = 1;
2984                 addr_inscope = 1;
2985         }
2986         net->failure_threshold = stcb->asoc.def_net_failure;
2987         if (addr_inscope == 0) {
2988                 net->dest_state = (SCTP_ADDR_REACHABLE |
2989                     SCTP_ADDR_OUT_OF_SCOPE);
2990         } else {
2991                 if (from == SCTP_ADDR_IS_CONFIRMED)
2992                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
2993                         net->dest_state = SCTP_ADDR_REACHABLE;
2994                 else
2995                         net->dest_state = SCTP_ADDR_REACHABLE |
2996                             SCTP_ADDR_UNCONFIRMED;
2997         }
2998         net->RTO = stcb->asoc.initial_rto;
2999         stcb->asoc.numnets++;
3000         *(&net->ref_count) = 1;
3001         net->tos_flowlabel = 0;
3002 #ifdef INET
3003         if (newaddr->sa_family == AF_INET)
3004                 net->tos_flowlabel = stcb->asoc.default_tos;
3005 #endif
3006 #ifdef INET6
3007         if (newaddr->sa_family == AF_INET6)
3008                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3009 #endif
3010         /* Init the timer structure */
3011         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3012         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3013         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3014
3015         /* Now generate a route for this guy */
3016         /* KAME hack: embed scopeid */
3017         if (newaddr->sa_family == AF_INET6) {
3018                 struct sockaddr_in6 *sin6;
3019
3020                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3021                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3022                 sin6->sin6_scope_id = 0;
3023         }
3024         rtalloc_ign((struct route *)&net->ro, 0UL);
3025
3026         if (newaddr->sa_family == AF_INET6) {
3027                 struct sockaddr_in6 *sin6;
3028
3029                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3030                 (void)sa6_recoverscope(sin6);
3031         }
3032         if ((net->ro.ro_rt) &&
3033             (net->ro.ro_rt->rt_ifp)) {
3034                 net->mtu = net->ro.ro_rt->rt_ifp->if_mtu;
3035                 if (from == SCTP_ALLOC_ASOC) {
3036                         stcb->asoc.smallest_mtu = net->mtu;
3037                 }
3038                 /* start things off to match mtu of interface please. */
3039                 net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu;
3040         } else {
3041                 net->mtu = stcb->asoc.smallest_mtu;
3042         }
3043
3044         if (stcb->asoc.smallest_mtu > net->mtu) {
3045                 stcb->asoc.smallest_mtu = net->mtu;
3046         }
3047         /*
3048          * We take the max of the burst limit times a MTU or the
3049          * INITIAL_CWND. We then limit this to 4 MTU's of sending.
3050          */
3051         sctp_set_initial_cc_param(stcb, net);
3052
3053
3054 #if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING)
3055         sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION);
3056 #endif
3057
3058         /*
3059          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3060          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3061          */
3062         net->find_pseudo_cumack = 1;
3063         net->find_rtx_pseudo_cumack = 1;
3064         net->src_addr_selected = 0;
3065         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3066         if (net->ro.ro_rt == NULL) {
3067                 /* Since we have no route put it at the back */
3068                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3069         } else if (netfirst == NULL) {
3070                 /* We are the first one in the pool. */
3071                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3072         } else if (netfirst->ro.ro_rt == NULL) {
3073                 /*
3074                  * First one has NO route. Place this one ahead of the first
3075                  * one.
3076                  */
3077                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3078         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3079                 /*
3080                  * This one has a different interface than the one at the
3081                  * top of the list. Place it ahead.
3082                  */
3083                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3084         } else {
3085                 /*
3086                  * Ok we have the same interface as the first one. Move
3087                  * forward until we find either a) one with a NULL route...
3088                  * insert ahead of that b) one with a different ifp.. insert
3089                  * after that. c) end of the list.. insert at the tail.
3090                  */
3091                 struct sctp_nets *netlook;
3092
3093                 do {
3094                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3095                         if (netlook == NULL) {
3096                                 /* End of the list */
3097                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3098                                 break;
3099                         } else if (netlook->ro.ro_rt == NULL) {
3100                                 /* next one has NO route */
3101                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3102                                 break;
3103                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3104                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3105                                     net, sctp_next);
3106                                 break;
3107                         }
3108                         /* Shift forward */
3109                         netfirst = netlook;
3110                 } while (netlook != NULL);
3111         }
3112
3113         /* got to have a primary set */
3114         if (stcb->asoc.primary_destination == 0) {
3115                 stcb->asoc.primary_destination = net;
3116         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3117                     (net->ro.ro_rt) &&
3118             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3119                 /* No route to current primary adopt new primary */
3120                 stcb->asoc.primary_destination = net;
3121         }
3122         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3123             net);
3124         /* Validate primary is first */
3125         net = TAILQ_FIRST(&stcb->asoc.nets);
3126         if ((net != stcb->asoc.primary_destination) &&
3127             (stcb->asoc.primary_destination)) {
3128                 /*
3129                  * first one on the list is NOT the primary sctp_cmpaddr()
3130                  * is much more efficent if the primary is the first on the
3131                  * list, make it so.
3132                  */
3133                 TAILQ_REMOVE(&stcb->asoc.nets,
3134                     stcb->asoc.primary_destination, sctp_next);
3135                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3136                     stcb->asoc.primary_destination, sctp_next);
3137         }
3138         return (0);
3139 }
3140
3141
3142 /*
3143  * allocate an association and add it to the endpoint. The caller must be
3144  * careful to add all additional addresses once they are know right away or
3145  * else the assoc will be may experience a blackout scenario.
3146  */
3147 struct sctp_tcb *
3148 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3149     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf)
3150 {
3151         struct sctp_tcb *stcb;
3152         struct sctp_association *asoc;
3153         struct sctpasochead *head;
3154         uint16_t rport;
3155         int err;
3156
3157         /*
3158          * Assumption made here: Caller has done a
3159          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3160          * address does not exist already.
3161          */
3162         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3163                 /* Hit max assoc, sorry no more */
3164                 *error = ENOBUFS;
3165                 return (NULL);
3166         }
3167         SCTP_INP_RLOCK(inp);
3168         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3169                 /*
3170                  * If its in the TCP pool, its NOT allowed to create an
3171                  * association. The parent listener needs to call
3172                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3173                  * off, or connected one does this.. its an error.
3174                  */
3175                 SCTP_INP_RUNLOCK(inp);
3176                 *error = EINVAL;
3177                 return (NULL);
3178         }
3179 #ifdef SCTP_DEBUG
3180         if (sctp_debug_on & SCTP_DEBUG_PCB3) {
3181                 printf("Allocate an association for peer:");
3182                 if (firstaddr)
3183                         sctp_print_address(firstaddr);
3184                 else
3185                         printf("None\n");
3186                 printf("Port:%d\n",
3187                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3188         }
3189 #endif                          /* SCTP_DEBUG */
3190         if (firstaddr->sa_family == AF_INET) {
3191                 struct sockaddr_in *sin;
3192
3193                 sin = (struct sockaddr_in *)firstaddr;
3194                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3195                         /* Invalid address */
3196                         SCTP_INP_RUNLOCK(inp);
3197                         *error = EINVAL;
3198                         return (NULL);
3199                 }
3200                 rport = sin->sin_port;
3201         } else if (firstaddr->sa_family == AF_INET6) {
3202                 struct sockaddr_in6 *sin6;
3203
3204                 sin6 = (struct sockaddr_in6 *)firstaddr;
3205                 if ((sin6->sin6_port == 0) ||
3206                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3207                         /* Invalid address */
3208                         SCTP_INP_RUNLOCK(inp);
3209                         *error = EINVAL;
3210                         return (NULL);
3211                 }
3212                 rport = sin6->sin6_port;
3213         } else {
3214                 /* not supported family type */
3215                 SCTP_INP_RUNLOCK(inp);
3216                 *error = EINVAL;
3217                 return (NULL);
3218         }
3219         SCTP_INP_RUNLOCK(inp);
3220         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3221                 /*
3222                  * If you have not performed a bind, then we need to do the
3223                  * ephemerial bind for you.
3224                  */
3225                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3226                     (struct sockaddr *)NULL,
3227                     (struct thread *)NULL
3228                     ))) {
3229                         /* bind error, probably perm */
3230                         *error = err;
3231                         return (NULL);
3232                 }
3233         }
3234         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3235         if (stcb == NULL) {
3236                 /* out of memory? */
3237                 *error = ENOMEM;
3238                 return (NULL);
3239         }
3240         SCTP_INCR_ASOC_COUNT();
3241
3242         bzero(stcb, sizeof(*stcb));
3243         asoc = &stcb->asoc;
3244         SCTP_TCB_LOCK_INIT(stcb);
3245         SCTP_TCB_SEND_LOCK_INIT(stcb);
3246         /* setup back pointer's */
3247         stcb->sctp_ep = inp;
3248         stcb->sctp_socket = inp->sctp_socket;
3249         if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag, vrf))) {
3250                 /* failed */
3251                 SCTP_TCB_LOCK_DESTROY(stcb);
3252                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3253                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3254                 SCTP_DECR_ASOC_COUNT();
3255                 *error = err;
3256                 return (NULL);
3257         }
3258         /* and the port */
3259         stcb->rport = rport;
3260         SCTP_INP_INFO_WLOCK();
3261         SCTP_INP_WLOCK(inp);
3262         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3263                 /* inpcb freed while alloc going on */
3264                 SCTP_TCB_LOCK_DESTROY(stcb);
3265                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3266                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3267                 SCTP_INP_WUNLOCK(inp);
3268                 SCTP_INP_INFO_WUNLOCK();
3269                 SCTP_DECR_ASOC_COUNT();
3270                 *error = EINVAL;
3271                 return (NULL);
3272         }
3273         SCTP_TCB_LOCK(stcb);
3274
3275         /* now that my_vtag is set, add it to the hash */
3276         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3277             sctppcbinfo.hashasocmark)];
3278         /* put it in the bucket in the vtag hash of assoc's for the system */
3279         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3280         SCTP_INP_INFO_WUNLOCK();
3281
3282         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3283                 /* failure.. memory error? */
3284                 if (asoc->strmout)
3285                         SCTP_FREE(asoc->strmout);
3286                 if (asoc->mapping_array)
3287                         SCTP_FREE(asoc->mapping_array);
3288
3289                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3290                 SCTP_DECR_ASOC_COUNT();
3291                 SCTP_TCB_LOCK_DESTROY(stcb);
3292                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3293                 SCTP_INP_WUNLOCK(inp);
3294                 *error = ENOBUFS;
3295                 return (NULL);
3296         }
3297         /* Init all the timers */
3298         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3299         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3300         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3301         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3302         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3303         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3304         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3305
3306         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3307         /* now file the port under the hash as well */
3308         if (inp->sctp_tcbhash != NULL) {
3309                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3310                     inp->sctp_hashmark)];
3311                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3312         }
3313         SCTP_INP_WUNLOCK(inp);
3314 #ifdef SCTP_DEBUG
3315         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
3316                 printf("Association %p now allocated\n", stcb);
3317         }
3318 #endif
3319         return (stcb);
3320 }
3321
3322
3323 void
3324 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3325 {
3326         struct sctp_association *asoc;
3327
3328         asoc = &stcb->asoc;
3329         asoc->numnets--;
3330         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3331         if (net == asoc->primary_destination) {
3332                 /* Reset primary */
3333                 struct sctp_nets *lnet;
3334
3335                 lnet = TAILQ_FIRST(&asoc->nets);
3336                 /* Try to find a confirmed primary */
3337                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3338         }
3339         if (net == asoc->last_data_chunk_from) {
3340                 /* Reset primary */
3341                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3342         }
3343         if (net == asoc->last_control_chunk_from) {
3344                 /* Clear net */
3345                 asoc->last_control_chunk_from = NULL;
3346         }
3347         sctp_free_remote_addr(net);
3348 }
3349
3350 /*
3351  * remove a remote endpoint address from an association, it will fail if the
3352  * address does not exist.
3353  */
3354 int
3355 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3356 {
3357         /*
3358          * Here we need to remove a remote address. This is quite simple, we
3359          * first find it in the list of address for the association
3360          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3361          * on that item. Note we do not allow it to be removed if there are
3362          * no other addresses.
3363          */
3364         struct sctp_association *asoc;
3365         struct sctp_nets *net, *net_tmp;
3366
3367         asoc = &stcb->asoc;
3368
3369         /* locate the address */
3370         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3371                 net_tmp = TAILQ_NEXT(net, sctp_next);
3372                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3373                         continue;
3374                 }
3375                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3376                     remaddr)) {
3377                         /* we found the guy */
3378                         if (asoc->numnets < 2) {
3379                                 /* Must have at LEAST two remote addresses */
3380                                 return (-1);
3381                         } else {
3382                                 sctp_remove_net(stcb, net);
3383                                 return (0);
3384                         }
3385                 }
3386         }
3387         /* not found. */
3388         return (-2);
3389 }
3390
3391
3392 void
3393 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time)
3394 {
3395         struct sctpvtaghead *chain;
3396         struct sctp_tagblock *twait_block;
3397         struct timeval now;
3398         int set, i;
3399
3400         SCTP_GETTIME_TIMEVAL(&now);
3401         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3402         set = 0;
3403         if (!SCTP_LIST_EMPTY(chain)) {
3404                 /* Block(s) present, lets find space, and expire on the fly */
3405                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3406                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3407                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3408                                     !set) {
3409                                         twait_block->vtag_block[i].tv_sec_at_expire =
3410                                             now.tv_sec + time;
3411                                         twait_block->vtag_block[i].v_tag = tag;
3412                                         set = 1;
3413                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3414                                             ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3415                                     now.tv_sec)) {
3416                                         /* Audit expires this guy */
3417                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3418                                         twait_block->vtag_block[i].v_tag = 0;
3419                                         if (set == 0) {
3420                                                 /* Reuse it for my new tag */
3421                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3422                                                 twait_block->vtag_block[0].v_tag = tag;
3423                                                 set = 1;
3424                                         }
3425                                 }
3426                         }
3427                         if (set) {
3428                                 /*
3429                                  * We only do up to the block where we can
3430                                  * place our tag for audits
3431                                  */
3432                                 break;
3433                         }
3434                 }
3435         }
3436         /* Need to add a new block to chain */
3437         if (!set) {
3438                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3439                     sizeof(struct sctp_tagblock), "TimeWait");
3440                 if (twait_block == NULL) {
3441                         return;
3442                 }
3443                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
3444                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3445                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3446                     SCTP_TIME_WAIT;
3447                 twait_block->vtag_block[0].v_tag = tag;
3448         }
3449 }
3450
3451
3452 static void
3453 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3454 {
3455         struct sctp_iterator *it;
3456
3457         /*
3458          * Unlock the tcb lock we do this so we avoid a dead lock scenario
3459          * where the iterator is waiting on the TCB lock and the TCB lock is
3460          * waiting on the iterator lock.
3461          */
3462         it = stcb->asoc.stcb_starting_point_for_iterator;
3463         if (it == NULL) {
3464                 return;
3465         }
3466         if (it->inp != stcb->sctp_ep) {
3467                 /* hmm, focused on the wrong one? */
3468                 return;
3469         }
3470         if (it->stcb != stcb) {
3471                 return;
3472         }
3473         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3474         if (it->stcb == NULL) {
3475                 /* done with all asoc's in this assoc */
3476                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3477                         it->inp = NULL;
3478                 } else {
3479                         it->inp = LIST_NEXT(inp, sctp_list);
3480                 }
3481         }
3482 }
3483
3484
3485 /*
3486  * Free the association after un-hashing the remote port.
3487  */
3488 int
3489 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
3490 {
3491         int i;
3492         struct sctp_association *asoc;
3493         struct sctp_nets *net, *prev;
3494         struct sctp_laddr *laddr;
3495         struct sctp_tmit_chunk *chk;
3496         struct sctp_asconf_addr *aparam;
3497         struct sctp_stream_reset_list *liste;
3498         struct sctp_queued_to_read *sq;
3499         struct sctp_stream_queue_pending *sp;
3500         sctp_sharedkey_t *shared_key;
3501         struct socket *so;
3502         int ccnt = 0;
3503         int cnt = 0;
3504
3505         /* first, lets purge the entry from the hash table. */
3506
3507 #ifdef SCTP_LOG_CLOSING
3508         sctp_log_closing(inp, stcb, 6);
3509 #endif
3510         if (stcb->asoc.state == 0) {
3511 #ifdef SCTP_LOG_CLOSING
3512                 sctp_log_closing(inp, NULL, 7);
3513 #endif
3514                 /* there is no asoc, really TSNH :-0 */
3515                 return (1);
3516         }
3517         /* TEMP CODE */
3518         if (stcb->freed_from_where == 0) {
3519                 /* Only record the first place free happened from */
3520                 stcb->freed_from_where = from_location;
3521         }
3522         /* TEMP CODE */
3523
3524         asoc = &stcb->asoc;
3525         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3526             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3527                 /* nothing around */
3528                 so = NULL;
3529         else
3530                 so = inp->sctp_socket;
3531
3532         /*
3533          * We used timer based freeing if a reader or writer is in the way.
3534          * So we first check if we are actually being called from a timer,
3535          * if so we abort early if a reader or writer is still in the way.
3536          */
3537         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3538             (from_inpcbfree == SCTP_NORMAL_PROC)) {
3539                 /*
3540                  * is it the timer driving us? if so are the reader/writers
3541                  * gone?
3542                  */
3543                 if (stcb->asoc.refcnt) {
3544                         /* nope, reader or writer in the way */
3545                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3546                         /* no asoc destroyed */
3547                         SCTP_TCB_UNLOCK(stcb);
3548 #ifdef SCTP_LOG_CLOSING
3549                         sctp_log_closing(inp, stcb, 8);
3550 #endif
3551                         return (0);
3552                 }
3553         }
3554         /* now clean up any other timers */
3555         SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3556         asoc->hb_timer.self = NULL;
3557         SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3558         asoc->dack_timer.self = NULL;
3559         SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3560         /*-
3561          * For stream reset we don't blast this unless
3562          * it is a str-reset timer, it might be the
3563          * free-asoc timer which we DON'T want to
3564          * disturb.
3565          */
3566         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
3567                 asoc->strreset_timer.self = NULL;
3568         SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3569         asoc->asconf_timer.self = NULL;
3570         SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3571         asoc->autoclose_timer.self = NULL;
3572         SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3573         asoc->shut_guard_timer.self = NULL;
3574         SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3575         asoc->delayed_event_timer.self = NULL;
3576         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3577                 SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3578                 net->fr_timer.self = NULL;
3579                 SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3580                 net->rxt_timer.self = NULL;
3581                 SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3582                 net->pmtu_timer.self = NULL;
3583         }
3584         /* Now the read queue needs to be cleaned up (only once) */
3585         cnt = 0;
3586         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
3587                 SCTP_INP_READ_LOCK(inp);
3588                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
3589                         if (sq->stcb == stcb) {
3590                                 sq->do_not_ref_stcb = 1;
3591                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3592                                 /*
3593                                  * If there is no end, there never will be
3594                                  * now.
3595                                  */
3596                                 if (sq->end_added == 0) {
3597                                         /* Held for PD-API clear that. */
3598                                         sq->pdapi_aborted = 1;
3599                                         sq->held_length = 0;
3600                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3601                                                 /*
3602                                                  * Need to add a PD-API
3603                                                  * aborted indication.
3604                                                  * Setting the control_pdapi
3605                                                  * assures that it will be
3606                                                  * added right after this
3607                                                  * msg.
3608                                                  */
3609                                                 uint32_t strseq;
3610
3611                                                 stcb->asoc.control_pdapi = sq;
3612                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
3613                                                 sctp_notify_partial_delivery_indication(stcb,
3614                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
3615                                                 stcb->asoc.control_pdapi = NULL;
3616                                         }
3617                                 }
3618                                 /* Add an end to wake them */
3619                                 sq->end_added = 1;
3620                                 cnt++;
3621                         }
3622                 }
3623                 SCTP_INP_READ_UNLOCK(inp);
3624                 if (stcb->block_entry) {
3625                         cnt++;
3626                         stcb->block_entry->error = ECONNRESET;
3627                         stcb->block_entry = NULL;
3628                 }
3629         }
3630         stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3631         if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) {
3632                 /*
3633                  * reader or writer in the way, we have hopefully given him
3634                  * something to chew on above.
3635                  */
3636                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3637                 SCTP_TCB_UNLOCK(stcb);
3638                 if (so) {
3639                         SCTP_INP_RLOCK(inp);
3640                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3641                             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3642                                 /* nothing around */
3643                                 so = NULL;
3644                         if (so) {
3645                                 /* Wake any reader/writers */
3646                                 sctp_sorwakeup(inp, so);
3647                                 sctp_sowwakeup(inp, so);
3648                         }
3649                         SCTP_INP_RUNLOCK(inp);
3650
3651                 }
3652 #ifdef SCTP_LOG_CLOSING
3653                 sctp_log_closing(inp, stcb, 9);
3654 #endif
3655                 /* no asoc destroyed */
3656                 return (0);
3657         }
3658 #ifdef SCTP_LOG_CLOSING
3659         sctp_log_closing(inp, stcb, 10);
3660 #endif
3661         /*
3662          * When I reach here, no others want to kill the assoc yet.. and I
3663          * own the lock. Now its possible an abort comes in when I do the
3664          * lock exchange below to grab all the locks to do the final take
3665          * out. to prevent this we increment the count, which will start a
3666          * timer and blow out above thus assuring us that we hold exclusive
3667          * killing of the asoc. Note that after getting back the TCB lock we
3668          * will go ahead and increment the counter back up and stop any
3669          * timer a passing stranger may have started :-S
3670          */
3671         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3672                 atomic_add_int(&stcb->asoc.refcnt, 1);
3673
3674                 SCTP_TCB_UNLOCK(stcb);
3675
3676                 SCTP_ITERATOR_LOCK();
3677                 SCTP_INP_INFO_WLOCK();
3678                 SCTP_INP_WLOCK(inp);
3679                 SCTP_TCB_LOCK(stcb);
3680         }
3681         /* Double check the GONE flag */
3682         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3683             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3684                 /* nothing around */
3685                 so = NULL;
3686
3687         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3688             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3689                 /*
3690                  * For TCP type we need special handling when we are
3691                  * connected. We also include the peel'ed off ones to.
3692                  */
3693                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3694                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3695                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3696                         if (so) {
3697                                 SOCK_LOCK(so);
3698                                 if (so->so_rcv.sb_cc == 0) {
3699                                         so->so_state &= ~(SS_ISCONNECTING |
3700                                             SS_ISDISCONNECTING |
3701                                             SS_ISCONFIRMING |
3702                                             SS_ISCONNECTED);
3703                                 }
3704                                 SOCK_UNLOCK(so);
3705                                 sctp_sowwakeup(inp, so);
3706                                 sctp_sorwakeup(inp, so);
3707                                 wakeup(&so->so_timeo);
3708                         }
3709                 }
3710         }
3711         /*
3712          * Make it invalid too, that way if its about to run it will abort
3713          * and return.
3714          */
3715         sctp_iterator_asoc_being_freed(inp, stcb);
3716         /* re-increment the lock */
3717         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3718                 atomic_add_int(&stcb->asoc.refcnt, -1);
3719         }
3720         asoc->state = 0;
3721         if (inp->sctp_tcbhash) {
3722                 LIST_REMOVE(stcb, sctp_tcbhash);
3723         }
3724         if (stcb->asoc.in_restart_hash) {
3725                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3726         }
3727         /* Now lets remove it from the list of ALL associations in the EP */
3728         LIST_REMOVE(stcb, sctp_tcblist);
3729         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3730                 SCTP_INP_INCR_REF(inp);
3731                 SCTP_INP_WUNLOCK(inp);
3732                 SCTP_ITERATOR_UNLOCK();
3733         }
3734         /* pull from vtag hash */
3735         LIST_REMOVE(stcb, sctp_asocs);
3736         sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT);
3737
3738
3739         /*
3740          * Now restop the timers to be sure - this is paranoia at is finest!
3741          */
3742         SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3743         SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3744         SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3745         SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3746         SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3747         SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3748         SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3749         SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3750
3751         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3752                 SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3753                 SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3754                 SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3755         }
3756
3757         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3758         prev = NULL;
3759         /*
3760          * The chunk lists and such SHOULD be empty but we check them just
3761          * in case.
3762          */
3763         /* anything on the wheel needs to be removed */
3764         for (i = 0; i < asoc->streamoutcnt; i++) {
3765                 struct sctp_stream_out *outs;
3766
3767                 outs = &asoc->strmout[i];
3768                 /* now clean up any chunks here */
3769                 sp = TAILQ_FIRST(&outs->outqueue);
3770                 while (sp) {
3771                         TAILQ_REMOVE(&outs->outqueue, sp, next);
3772                         if (sp->data) {
3773                                 sctp_m_freem(sp->data);
3774                                 sp->data = NULL;
3775                                 sp->tail_mbuf = NULL;
3776                         }
3777                         sctp_free_remote_addr(sp->net);
3778                         sctp_free_spbufspace(stcb, asoc, sp);
3779                         /* Free the zone stuff  */
3780                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3781                         SCTP_DECR_STRMOQ_COUNT();
3782                         sp = TAILQ_FIRST(&outs->outqueue);
3783                 }
3784         }
3785
3786         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3787                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3788                 SCTP_FREE(liste);
3789         }
3790
3791         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3792         while (sq) {
3793                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3794                 if (sq->data) {
3795                         sctp_m_freem(sq->data);
3796                         sq->data = NULL;
3797                 }
3798                 sctp_free_remote_addr(sq->whoFrom);
3799                 sq->whoFrom = NULL;
3800                 sq->stcb = NULL;
3801                 /* Free the ctl entry */
3802                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3803                 SCTP_DECR_READQ_COUNT();
3804                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3805         }
3806
3807         chk = TAILQ_FIRST(&asoc->free_chunks);
3808         while (chk) {
3809                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3810                 if (chk->data) {
3811                         sctp_m_freem(chk->data);
3812                         chk->data = NULL;
3813                 }
3814                 ccnt++;
3815                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3816                 SCTP_DECR_CHK_COUNT();
3817                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
3818                 asoc->free_chunk_cnt--;
3819                 chk = TAILQ_FIRST(&asoc->free_chunks);
3820         }
3821         /* pending send queue SHOULD be empty */
3822         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3823                 chk = TAILQ_FIRST(&asoc->send_queue);
3824                 while (chk) {
3825                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3826                         if (chk->data) {
3827                                 sctp_m_freem(chk->data);
3828                                 chk->data = NULL;
3829                         }
3830                         ccnt++;
3831                         sctp_free_remote_addr(chk->whoTo);
3832                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3833                         SCTP_DECR_CHK_COUNT();
3834                         chk = TAILQ_FIRST(&asoc->send_queue);
3835                 }
3836         }
3837 /*
3838   if(ccnt) {
3839   printf("Freed %d from send_queue\n", ccnt);
3840   ccnt = 0;
3841   }
3842 */
3843         /* sent queue SHOULD be empty */
3844         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
3845                 chk = TAILQ_FIRST(&asoc->sent_queue);
3846                 while (chk) {
3847                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
3848                         if (chk->data) {
3849                                 sctp_m_freem(chk->data);
3850                                 chk->data = NULL;
3851                         }
3852                         ccnt++;
3853                         sctp_free_remote_addr(chk->whoTo);
3854                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3855                         SCTP_DECR_CHK_COUNT();
3856                         chk = TAILQ_FIRST(&asoc->sent_queue);
3857                 }
3858         }
3859 /*
3860   if(ccnt) {
3861   printf("Freed %d from sent_queue\n", ccnt);
3862   ccnt = 0;
3863   }
3864 */
3865         /* control queue MAY not be empty */
3866         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
3867                 chk = TAILQ_FIRST(&asoc->control_send_queue);
3868                 while (chk) {
3869                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
3870                         if (chk->data) {
3871                                 sctp_m_freem(chk->data);
3872                                 chk->data = NULL;
3873                         }
3874                         ccnt++;
3875                         sctp_free_remote_addr(chk->whoTo);
3876                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3877                         SCTP_DECR_CHK_COUNT();
3878                         chk = TAILQ_FIRST(&asoc->control_send_queue);
3879                 }
3880         }
3881 /*
3882   if(ccnt) {
3883   printf("Freed %d from ctrl_queue\n", ccnt);
3884   ccnt = 0;
3885   }
3886 */
3887         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
3888                 chk = TAILQ_FIRST(&asoc->reasmqueue);
3889                 while (chk) {
3890                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
3891                         if (chk->data) {
3892                                 sctp_m_freem(chk->data);
3893                                 chk->data = NULL;
3894                         }
3895                         sctp_free_remote_addr(chk->whoTo);
3896                         ccnt++;
3897                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3898                         SCTP_DECR_CHK_COUNT();
3899                         chk = TAILQ_FIRST(&asoc->reasmqueue);
3900                 }
3901         }
3902 /*
3903   if(ccnt) {
3904   printf("Freed %d from reasm_queue\n", ccnt);
3905   ccnt = 0;
3906   }
3907 */
3908         if (asoc->mapping_array) {
3909                 SCTP_FREE(asoc->mapping_array);
3910                 asoc->mapping_array = NULL;
3911         }
3912         /* the stream outs */
3913         if (asoc->strmout) {
3914                 SCTP_FREE(asoc->strmout);
3915                 asoc->strmout = NULL;
3916         }
3917         asoc->streamoutcnt = 0;
3918         if (asoc->strmin) {
3919                 struct sctp_queued_to_read *ctl;
3920
3921                 for (i = 0; i < asoc->streamincnt; i++) {
3922                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
3923                                 /* We have somethings on the streamin queue */
3924                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3925                                 while (ctl) {
3926                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
3927                                             ctl, next);
3928                                         sctp_free_remote_addr(ctl->whoFrom);
3929                                         if (ctl->data) {
3930                                                 sctp_m_freem(ctl->data);
3931                                                 ctl->data = NULL;
3932                                         }
3933                                         /*
3934                                          * We don't free the address here
3935                                          * since all the net's were freed
3936                                          * above.
3937                                          */
3938                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
3939                                         SCTP_DECR_READQ_COUNT();
3940                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
3941                                 }
3942                         }
3943                 }
3944                 SCTP_FREE(asoc->strmin);
3945                 asoc->strmin = NULL;
3946         }
3947         asoc->streamincnt = 0;
3948         while (!TAILQ_EMPTY(&asoc->nets)) {
3949                 net = TAILQ_FIRST(&asoc->nets);
3950                 /* pull from list */
3951                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
3952 #ifdef INVARIANTS
3953                         panic("no net's left alloc'ed, or list points to itself");
3954 #endif
3955                         break;
3956                 }
3957                 prev = net;
3958                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3959                 sctp_free_remote_addr(net);
3960         }
3961
3962         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
3963                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
3964                 sctp_remove_laddr(laddr);
3965         }
3966
3967         /* pending asconf (address) parameters */
3968         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
3969                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
3970                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
3971                 SCTP_FREE(aparam);
3972         }
3973         if (asoc->last_asconf_ack_sent != NULL) {
3974                 sctp_m_freem(asoc->last_asconf_ack_sent);
3975                 asoc->last_asconf_ack_sent = NULL;
3976         }
3977         /* clean up auth stuff */
3978         if (asoc->local_hmacs)
3979                 sctp_free_hmaclist(asoc->local_hmacs);
3980         if (asoc->peer_hmacs)
3981                 sctp_free_hmaclist(asoc->peer_hmacs);
3982
3983         if (asoc->local_auth_chunks)
3984                 sctp_free_chunklist(asoc->local_auth_chunks);
3985         if (asoc->peer_auth_chunks)
3986                 sctp_free_chunklist(asoc->peer_auth_chunks);
3987
3988         sctp_free_authinfo(&asoc->authinfo);
3989
3990         shared_key = LIST_FIRST(&asoc->shared_keys);
3991         while (shared_key) {
3992                 LIST_REMOVE(shared_key, next);
3993                 sctp_free_sharedkey(shared_key);
3994                 shared_key = LIST_FIRST(&asoc->shared_keys);
3995         }
3996
3997         /* Insert new items here :> */
3998
3999         /* Get rid of LOCK */
4000         SCTP_TCB_LOCK_DESTROY(stcb);
4001         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4002         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4003                 SCTP_INP_INFO_WUNLOCK();
4004                 SCTP_INP_RLOCK(inp);
4005         }
4006 #ifdef SCTP_TRACK_FREED_ASOCS
4007         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4008                 /* now clean up the tasoc itself */
4009                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4010                 SCTP_DECR_ASOC_COUNT();
4011         } else {
4012                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4013         }
4014 #else
4015         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4016         SCTP_DECR_ASOC_COUNT();
4017 #endif
4018         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4019                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4020                         /*
4021                          * If its NOT the inp_free calling us AND sctp_close
4022                          * as been called, we call back...
4023                          */
4024                         SCTP_INP_RUNLOCK(inp);
4025                         /*
4026                          * This will start the kill timer (if we are the
4027                          * lastone) since we hold an increment yet. But this
4028                          * is the only safe way to do this since otherwise
4029                          * if the socket closes at the same time we are here
4030                          * we might collide in the cleanup.
4031                          */
4032                         sctp_inpcb_free(inp, 0, 0);
4033                         SCTP_INP_DECR_REF(inp);
4034                         goto out_of;
4035                 } else {
4036                         /* The socket is still open. */
4037                         SCTP_INP_DECR_REF(inp);
4038                 }
4039         }
4040         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4041                 SCTP_INP_RUNLOCK(inp);
4042         }
4043 out_of:
4044         /* destroyed the asoc */
4045 #ifdef SCTP_LOG_CLOSING
4046         sctp_log_closing(inp, NULL, 11);
4047 #endif
4048         return (1);
4049 }
4050
4051
4052
4053 /*
4054  * determine if a destination is "reachable" based upon the addresses bound
4055  * to the current endpoint (e.g. only v4 or v6 currently bound)
4056  */
4057 /*
4058  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4059  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4060  * types bound as its endpoint
4061  */
4062 int
4063 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4064 {
4065         struct sctp_inpcb *inp;
4066         int answer;
4067
4068         /*
4069          * No locks here, the TCB, in all cases is already locked and an
4070          * assoc is up. There is either a INP lock by the caller applied (in
4071          * asconf case when deleting an address) or NOT in the HB case,
4072          * however if HB then the INP increment is up and the INP will not
4073          * be removed (on top of the fact that we have a TCB lock). So we
4074          * only want to read the sctp_flags, which is either bound-all or
4075          * not.. no protection needed since once an assoc is up you can't be
4076          * changing your binding.
4077          */
4078         inp = stcb->sctp_ep;
4079         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4080                 /* if bound all, destination is not restricted */
4081                 /*
4082                  * RRS: Question during lock work: Is this correct? If you
4083                  * are bound-all you still might need to obey the V4--V6
4084                  * flags??? IMO this bound-all stuff needs to be removed!
4085                  */
4086                 return (1);
4087         }
4088         /* NOTE: all "scope" checks are done when local addresses are added */
4089         if (destaddr->sa_family == AF_INET6) {
4090                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4091         } else if (destaddr->sa_family == AF_INET) {
4092                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4093         } else {
4094                 /* invalid family, so it's unreachable */
4095                 answer = 0;
4096         }
4097         return (answer);
4098 }
4099
4100 /*
4101  * update the inp_vflags on an endpoint
4102  */
4103 static void
4104 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4105 {
4106         struct sctp_laddr *laddr;
4107
4108         /* first clear the flag */
4109         inp->ip_inp.inp.inp_vflag = 0;
4110         /* set the flag based on addresses on the ep list */
4111         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4112                 if (laddr->ifa == NULL) {
4113 #ifdef SCTP_DEBUG
4114                         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
4115                                 printf("An ounce of prevention is worth a pound of cure\n");
4116                         }
4117 #endif                          /* SCTP_DEBUG */
4118                         continue;
4119                 }
4120                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4121                         continue;
4122                 }
4123                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4124                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4125                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4126                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4127                 }
4128         }
4129 }
4130
4131 /*
4132  * Add the address to the endpoint local address list There is nothing to be
4133  * done if we are bound to all addresses
4134  */
4135 int
4136 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4137 {
4138         struct sctp_laddr *laddr;
4139         int fnd, error;
4140
4141         fnd = 0;
4142
4143         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4144                 /* You are already bound to all. You have it already */
4145                 return (0);
4146         }
4147         if (ifa->address.sa.sa_family == AF_INET6) {
4148                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4149                         /* Can't bind a non-useable addr. */
4150                         return (-1);
4151                 }
4152         }
4153         /* first, is it already present? */
4154         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4155                 if (laddr->ifa == ifa) {
4156                         fnd = 1;
4157                         break;
4158                 }
4159         }
4160
4161         if (fnd == 0) {
4162                 /* Not in the ep list */
4163                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4164                 if (error != 0)
4165                         return (error);
4166                 inp->laddr_count++;
4167                 /* update inp_vflag flags */
4168                 if (ifa->address.sa.sa_family == AF_INET6) {
4169                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4170                 } else if (ifa->address.sa.sa_family == AF_INET) {
4171                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4172                 }
4173         }
4174         return (0);
4175 }
4176
4177
4178 /*
4179  * select a new (hopefully reachable) destination net (should only be used
4180  * when we deleted an ep addr that is the only usable source address to reach
4181  * the destination net)
4182  */
4183 static void
4184 sctp_select_primary_destination(struct sctp_tcb *stcb)
4185 {
4186         struct sctp_nets *net;
4187
4188         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4189                 /* for now, we'll just pick the first reachable one we find */
4190                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4191                         continue;
4192                 if (sctp_destination_is_reachable(stcb,
4193                     (struct sockaddr *)&net->ro._l_addr)) {
4194                         /* found a reachable destination */
4195                         stcb->asoc.primary_destination = net;
4196                 }
4197         }
4198         /* I can't there from here! ...we're gonna die shortly... */
4199 }
4200
4201
4202 /*
4203  * Delete the address from the endpoint local address list There is nothing
4204  * to be done if we are bound to all addresses
4205  */
4206 int
4207 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4208 {
4209         struct sctp_laddr *laddr;
4210         int fnd;
4211
4212         fnd = 0;
4213         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4214                 /* You are already bound to all. You have it already */
4215                 return (EINVAL);
4216         }
4217         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4218                 if (laddr->ifa == ifa) {
4219                         fnd = 1;
4220                         break;
4221                 }
4222         }
4223         if (fnd && (inp->laddr_count < 2)) {
4224                 /* can't delete unless there are at LEAST 2 addresses */
4225                 return (-1);
4226         }
4227         if (fnd) {
4228                 /*
4229                  * clean up any use of this address go through our
4230                  * associations and clear any last_used_address that match
4231                  * this one for each assoc, see if a new primary_destination
4232                  * is needed
4233                  */
4234                 struct sctp_tcb *stcb;
4235
4236                 /* clean up "next_addr_touse" */
4237                 if (inp->next_addr_touse == laddr)
4238                         /* delete this address */
4239                         inp->next_addr_touse = NULL;
4240
4241                 /* clean up "last_used_address" */
4242                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4243                         struct sctp_nets *net;
4244
4245                         SCTP_TCB_LOCK(stcb);
4246                         if (stcb->asoc.last_used_address == laddr)
4247                                 /* delete this address */
4248                                 stcb->asoc.last_used_address = NULL;
4249                         /*
4250                          * Now spin through all the nets and purge any ref
4251                          * to laddr
4252                          */
4253                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4254                                 if (net->ro._s_addr &&
4255                                     (net->ro._s_addr->ifa == laddr->ifa)) {
4256                                         /* Yep, purge src address selected */
4257                                         struct rtentry *rt;
4258
4259                                         /* delete this address if cached */
4260                                         rt = net->ro.ro_rt;
4261                                         if (rt != NULL) {
4262                                                 RTFREE(rt);
4263                                                 net->ro.ro_rt = NULL;
4264                                         }
4265                                         sctp_free_ifa(net->ro._s_addr);
4266                                         net->ro._s_addr = NULL;
4267                                         net->src_addr_selected = 0;
4268                                 }
4269                         }
4270                         SCTP_TCB_UNLOCK(stcb);
4271                 }               /* for each tcb */
4272                 /* remove it from the ep list */
4273                 sctp_remove_laddr(laddr);
4274                 inp->laddr_count--;
4275                 /* update inp_vflag flags */
4276                 sctp_update_ep_vflag(inp);
4277         }
4278         return (0);
4279 }
4280
4281 /*
4282  * Add the addr to the TCB local address list For the BOUNDALL or dynamic
4283  * case, this is a "pending" address list (eg. addresses waiting for an
4284  * ASCONF-ACK response) For the subset binding, static case, this is a
4285  * "valid" address list
4286  */
4287 int
4288 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list)
4289 {
4290         struct sctp_inpcb *inp;
4291         struct sctp_laddr *laddr;
4292         struct sctpladdr *list;
4293         int error;
4294
4295         /*
4296          * Assumes TCB is locked.. and possibly the INP. May need to
4297          * confirm/fix that if we need it and is not the case.
4298          */
4299         list = &stcb->asoc.sctp_restricted_addrs;
4300
4301         inp = stcb->sctp_ep;
4302         if (ifa->address.sa.sa_family == AF_INET6) {
4303                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4304                         /* Can't bind a non-existent addr. */
4305                         return (-1);
4306                 }
4307         }
4308         /* does the address already exist? */
4309         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4310                 if (laddr->ifa == ifa) {
4311                         return (-1);
4312                 }
4313         }
4314
4315         /* add to the list */
4316         error = sctp_insert_laddr(list, ifa, 0);
4317         if (error != 0)
4318                 return (error);
4319         return (0);
4320 }
4321
4322 /*
4323  * insert an laddr entry with the given ifa for the desired list
4324  */
4325 int
4326 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4327 {
4328         struct sctp_laddr *laddr;
4329
4330         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4331         if (laddr == NULL) {
4332                 /* out of memory? */
4333                 return (EINVAL);
4334         }
4335         SCTP_INCR_LADDR_COUNT();
4336         bzero(laddr, sizeof(*laddr));
4337         laddr->ifa = ifa;
4338         laddr->action = act;
4339         atomic_add_int(&ifa->refcount, 1);
4340         /* insert it */
4341         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4342
4343         return (0);
4344 }
4345
4346 /*
4347  * Remove an laddr entry from the local address list (on an assoc)
4348  */
4349 void
4350 sctp_remove_laddr(struct sctp_laddr *laddr)
4351 {
4352
4353         /* remove from the list */
4354         LIST_REMOVE(laddr, sctp_nxt_addr);
4355         sctp_free_ifa(laddr->ifa);
4356         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4357         SCTP_DECR_LADDR_COUNT();
4358 }
4359
4360 /*
4361  * Remove an address from the TCB local address list
4362  */
4363 int
4364 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4365 {
4366         struct sctp_inpcb *inp;
4367         struct sctp_laddr *laddr;
4368
4369         /*
4370          * This is called by asconf work. It is assumed that a) The TCB is
4371          * locked and b) The INP is locked. This is true in as much as I can
4372          * trace through the entry asconf code where I did these locks.
4373          * Again, the ASCONF code is a bit different in that it does lock
4374          * the INP during its work often times. This must be since we don't
4375          * want other proc's looking up things while what they are looking
4376          * up is changing :-D
4377          */
4378
4379         inp = stcb->sctp_ep;
4380         /* if subset bound and don't allow ASCONF's, can't delete last */
4381         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4382             (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4383                 if (stcb->asoc.numnets < 2) {
4384                         /* can't delete last address */
4385                         return (-1);
4386                 }
4387         }
4388         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4389                 /* remove the address if it exists */
4390                 if (laddr->ifa == NULL)
4391                         continue;
4392                 if (laddr->ifa == ifa) {
4393                         sctp_remove_laddr(laddr);
4394                         return (0);
4395                 }
4396         }
4397
4398         /* address not found! */
4399         return (-1);
4400 }
4401
4402 static char sctp_pcb_initialized = 0;
4403
4404 /*
4405  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4406  */
4407 /* sysctl */
4408 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4409 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4410
4411 void
4412 sctp_pcb_init()
4413 {
4414         /*
4415          * SCTP initialization for the PCB structures should be called by
4416          * the sctp_init() funciton.
4417          */
4418         int i;
4419
4420         if (sctp_pcb_initialized != 0) {
4421                 /* error I was called twice */
4422                 return;
4423         }
4424         sctp_pcb_initialized = 1;
4425
4426         bzero(&sctpstat, sizeof(struct sctpstat));
4427         SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime);
4428         /* init the empty list of (All) Endpoints */
4429         LIST_INIT(&sctppcbinfo.listhead);
4430
4431         /* init the iterator head */
4432         TAILQ_INIT(&sctppcbinfo.iteratorhead);
4433
4434         /* init the hash table of endpoints */
4435         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4436         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4437         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4438         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
4439             &sctppcbinfo.hashasocmark);
4440         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
4441             &sctppcbinfo.hashmark);
4442         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
4443             &sctppcbinfo.hashtcpmark);
4444         sctppcbinfo.hashtblsize = sctp_hashtblsize;
4445
4446         /* init the small hash table we use to track restarted asoc's */
4447         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
4448             &sctppcbinfo.hashrestartmark);
4449
4450
4451         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
4452             &sctppcbinfo.hashvrfmark);
4453
4454         /* init the zones */
4455         /*
4456          * FIX ME: Should check for NULL returns, but if it does fail we are
4457          * doomed to panic anyways... add later maybe.
4458          */
4459         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4460             sizeof(struct sctp_inpcb), maxsockets);
4461
4462         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4463             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4464
4465         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4466             sizeof(struct sctp_laddr),
4467             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4468
4469         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4470             sizeof(struct sctp_nets),
4471             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4472
4473         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4474             sizeof(struct sctp_tmit_chunk),
4475             (sctp_max_number_of_assoc * sctp_chunkscale));
4476
4477         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4478             sizeof(struct sctp_queued_to_read),
4479             (sctp_max_number_of_assoc * sctp_chunkscale));
4480
4481         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4482             sizeof(struct sctp_stream_queue_pending),
4483             (sctp_max_number_of_assoc * sctp_chunkscale));
4484
4485         /* Master Lock INIT for info structure */
4486         SCTP_INP_INFO_LOCK_INIT();
4487         SCTP_STATLOG_INIT_LOCK();
4488         SCTP_ITERATOR_LOCK_INIT();
4489
4490         SCTP_IPI_COUNT_INIT();
4491         SCTP_IPI_ADDR_INIT();
4492         SCTP_IPI_ITERATOR_WQ_INIT();
4493
4494         LIST_INIT(&sctppcbinfo.addr_wq);
4495
4496         /* not sure if we need all the counts */
4497         sctppcbinfo.ipi_count_ep = 0;
4498         /* assoc/tcb zone info */
4499         sctppcbinfo.ipi_count_asoc = 0;
4500         /* local addrlist zone info */
4501         sctppcbinfo.ipi_count_laddr = 0;
4502         /* remote addrlist zone info */
4503         sctppcbinfo.ipi_count_raddr = 0;
4504         /* chunk info */
4505         sctppcbinfo.ipi_count_chunk = 0;
4506
4507         /* socket queue zone info */
4508         sctppcbinfo.ipi_count_readq = 0;
4509
4510         /* stream out queue cont */
4511         sctppcbinfo.ipi_count_strmoq = 0;
4512
4513         sctppcbinfo.ipi_free_strmoq = 0;
4514         sctppcbinfo.ipi_free_chunks = 0;
4515
4516         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
4517
4518         /* Init the TIMEWAIT list */
4519         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
4520                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4521         }
4522
4523 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
4524         sctppcbinfo.iterator_running = 0;
4525         sctp_startup_iterator();
4526 #endif
4527
4528         /*
4529          * INIT the default VRF which for BSD is the only one, other O/S's
4530          * may have more. But initially they must start with one and then
4531          * add the VRF's as addresses are added.
4532          */
4533         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
4534
4535 }
4536
4537
4538 int
4539 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4540     int iphlen, int offset, int limit, struct sctphdr *sh,
4541     struct sockaddr *altsa)
4542 {
4543         /*
4544          * grub through the INIT pulling addresses and loading them to the
4545          * nets structure in the asoc. The from address in the mbuf should
4546          * also be loaded (if it is not already). This routine can be called
4547          * with either INIT or INIT-ACK's as long as the m points to the IP
4548          * packet and the offset points to the beginning of the parameters.
4549          */
4550         struct sctp_inpcb *inp, *l_inp;
4551         struct sctp_nets *net, *net_tmp;
4552         struct ip *iph;
4553         struct sctp_paramhdr *phdr, parm_buf;
4554         struct sctp_tcb *stcb_tmp;
4555         uint16_t ptype, plen;
4556         struct sockaddr *sa;
4557         struct sockaddr_storage dest_store;
4558         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4559         struct sockaddr_in sin;
4560         struct sockaddr_in6 sin6;
4561         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
4562         struct sctp_auth_random *p_random = NULL;
4563         uint16_t random_len = 0;
4564         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
4565         struct sctp_auth_hmac_algo *hmacs = NULL;
4566         uint16_t hmacs_len = 0;
4567         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
4568         struct sctp_auth_chunk_list *chunks = NULL;
4569         uint16_t num_chunks = 0;
4570         sctp_key_t *new_key;
4571         uint32_t keylen;
4572         int got_random = 0, got_hmacs = 0, got_chklist = 0;
4573
4574         /* First get the destination address setup too. */
4575         memset(&sin, 0, sizeof(sin));
4576         memset(&sin6, 0, sizeof(sin6));
4577
4578         sin.sin_family = AF_INET;
4579         sin.sin_len = sizeof(sin);
4580         sin.sin_port = stcb->rport;
4581
4582         sin6.sin6_family = AF_INET6;
4583         sin6.sin6_len = sizeof(struct sockaddr_in6);
4584         sin6.sin6_port = stcb->rport;
4585         if (altsa == NULL) {
4586                 iph = mtod(m, struct ip *);
4587                 if (iph->ip_v == IPVERSION) {
4588                         /* its IPv4 */
4589                         struct sockaddr_in *sin_2;
4590
4591                         sin_2 = (struct sockaddr_in *)(local_sa);
4592                         memset(sin_2, 0, sizeof(sin));
4593                         sin_2->sin_family = AF_INET;
4594                         sin_2->sin_len = sizeof(sin);
4595                         sin_2->sin_port = sh->dest_port;
4596                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4597                         sin.sin_addr = iph->ip_src;
4598                         sa = (struct sockaddr *)&sin;
4599                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4600                         /* its IPv6 */
4601                         struct ip6_hdr *ip6;
4602                         struct sockaddr_in6 *sin6_2;
4603
4604                         ip6 = mtod(m, struct ip6_hdr *);
4605                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4606                         memset(sin6_2, 0, sizeof(sin6));
4607                         sin6_2->sin6_family = AF_INET6;
4608                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4609                         sin6_2->sin6_port = sh->dest_port;
4610                         sin6.sin6_addr = ip6->ip6_src;
4611                         sa = (struct sockaddr *)&sin6;
4612                 } else {
4613                         sa = NULL;
4614                 }
4615         } else {
4616                 /*
4617                  * For cookies we use the src address NOT from the packet
4618                  * but from the original INIT
4619                  */
4620                 sa = altsa;
4621         }
4622         /* Turn off ECN until we get through all params */
4623         stcb->asoc.ecn_allowed = 0;
4624         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4625                 /* mark all addresses that we have currently on the list */
4626                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4627         }
4628         /* does the source address already exist? if so skip it */
4629         l_inp = inp = stcb->sctp_ep;
4630
4631         atomic_add_int(&stcb->asoc.refcnt, 1);
4632         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4633         atomic_add_int(&stcb->asoc.refcnt, -1);
4634
4635         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4636                 /* we must add the source address */
4637                 /* no scope set here since we have a tcb already. */
4638                 if ((sa->sa_family == AF_INET) &&
4639                     (stcb->asoc.ipv4_addr_legal)) {
4640                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
4641                                 return (-1);
4642                         }
4643                 } else if ((sa->sa_family == AF_INET6) &&
4644                     (stcb->asoc.ipv6_addr_legal)) {
4645                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
4646                                 return (-2);
4647                         }
4648                 }
4649         } else {
4650                 if (net_tmp != NULL && stcb_tmp == stcb) {
4651                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4652                 } else if (stcb_tmp != stcb) {
4653                         /* It belongs to another association? */
4654                         SCTP_TCB_UNLOCK(stcb_tmp);
4655                         return (-3);
4656                 }
4657         }
4658         if (stcb->asoc.state == 0) {
4659                 /* the assoc was freed? */
4660                 return (-4);
4661         }
4662         /* now we must go through each of the params. */
4663         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4664         while (phdr) {
4665                 ptype = ntohs(phdr->param_type);
4666                 plen = ntohs(phdr->param_length);
4667                 /*
4668                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4669                  * (int)plen);
4670                  */
4671                 if (offset + plen > limit) {
4672                         break;
4673                 }
4674                 if (plen == 0) {
4675                         break;
4676                 }
4677                 if (ptype == SCTP_IPV4_ADDRESS) {
4678                         if (stcb->asoc.ipv4_addr_legal) {
4679                                 struct sctp_ipv4addr_param *p4, p4_buf;
4680
4681                                 /* ok get the v4 address and check/add */
4682                                 phdr = sctp_get_next_param(m, offset,
4683                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4684                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4685                                     phdr == NULL) {
4686                                         return (-5);
4687                                 }
4688                                 p4 = (struct sctp_ipv4addr_param *)phdr;
4689                                 sin.sin_addr.s_addr = p4->addr;
4690                                 sa = (struct sockaddr *)&sin;
4691                                 inp = stcb->sctp_ep;
4692                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4693                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4694                                     local_sa, stcb);
4695                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4696
4697                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4698                                     inp == NULL) {
4699                                         /* we must add the source address */
4700                                         /*
4701                                          * no scope set since we have a tcb
4702                                          * already
4703                                          */
4704
4705                                         /*
4706                                          * we must validate the state again
4707                                          * here
4708                                          */
4709                                         if (stcb->asoc.state == 0) {
4710                                                 /* the assoc was freed? */
4711                                                 return (-7);
4712                                         }
4713                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
4714                                                 return (-8);
4715                                         }
4716                                 } else if (stcb_tmp == stcb) {
4717                                         if (stcb->asoc.state == 0) {
4718                                                 /* the assoc was freed? */
4719                                                 return (-10);
4720                                         }
4721                                         if (net != NULL) {
4722                                                 /* clear flag */
4723                                                 net->dest_state &=
4724                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4725                                         }
4726                                 } else {
4727                                         /*
4728                                          * strange, address is in another
4729                                          * assoc? straighten out locks.
4730                                          */
4731                                         if (stcb->asoc.state == 0) {
4732                                                 /* the assoc was freed? */
4733                                                 return (-12);
4734                                         }
4735                                         return (-13);
4736                                 }
4737                         }
4738                 } else if (ptype == SCTP_IPV6_ADDRESS) {
4739                         if (stcb->asoc.ipv6_addr_legal) {
4740                                 /* ok get the v6 address and check/add */
4741                                 struct sctp_ipv6addr_param *p6, p6_buf;
4742
4743                                 phdr = sctp_get_next_param(m, offset,
4744                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4745                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4746                                     phdr == NULL) {
4747                                         return (-14);
4748                                 }
4749                                 p6 = (struct sctp_ipv6addr_param *)phdr;
4750                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4751                                     sizeof(p6->addr));
4752                                 sa = (struct sockaddr *)&sin6;
4753                                 inp = stcb->sctp_ep;
4754                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4755                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4756                                     local_sa, stcb);
4757                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4758                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4759                                     inp == NULL)) {
4760                                         /*
4761                                          * we must validate the state again
4762                                          * here
4763                                          */
4764                                         if (stcb->asoc.state == 0) {
4765                                                 /* the assoc was freed? */
4766                                                 return (-16);
4767                                         }
4768                                         /*
4769                                          * we must add the address, no scope
4770                                          * set
4771                                          */
4772                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
4773                                                 return (-17);
4774                                         }
4775                                 } else if (stcb_tmp == stcb) {
4776                                         /*
4777                                          * we must validate the state again
4778                                          * here
4779                                          */
4780                                         if (stcb->asoc.state == 0) {
4781                                                 /* the assoc was freed? */
4782                                                 return (-19);
4783                                         }
4784                                         if (net != NULL) {
4785                                                 /* clear flag */
4786                                                 net->dest_state &=
4787                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4788                                         }
4789                                 } else {
4790                                         /*
4791                                          * strange, address is in another
4792                                          * assoc? straighten out locks.
4793                                          */
4794                                         if (stcb->asoc.state == 0) {
4795                                                 /* the assoc was freed? */
4796                                                 return (-21);
4797                                         }
4798                                         return (-22);
4799                                 }
4800                         }
4801                 } else if (ptype == SCTP_ECN_CAPABLE) {
4802                         stcb->asoc.ecn_allowed = 1;
4803                 } else if (ptype == SCTP_ULP_ADAPTATION) {
4804                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
4805                                 struct sctp_adaptation_layer_indication ai,
4806                                                                 *aip;
4807
4808                                 phdr = sctp_get_next_param(m, offset,
4809                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
4810                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
4811                                 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
4812                                     stcb, ntohl(aip->indication), NULL);
4813                         }
4814                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
4815                         struct sctp_asconf_addr_param lstore, *fee;
4816                         struct sctp_asconf_addrv4_param *fii;
4817                         int lptype;
4818                         struct sockaddr *lsa = NULL;
4819
4820                         stcb->asoc.peer_supports_asconf = 1;
4821                         if (plen > sizeof(lstore)) {
4822                                 return (-23);
4823                         }
4824                         phdr = sctp_get_next_param(m, offset,
4825                             (struct sctp_paramhdr *)&lstore, plen);
4826                         if (phdr == NULL) {
4827                                 return (-24);
4828                         }
4829                         fee = (struct sctp_asconf_addr_param *)phdr;
4830                         lptype = ntohs(fee->addrp.ph.param_type);
4831                         if (lptype == SCTP_IPV4_ADDRESS) {
4832                                 if (plen !=
4833                                     sizeof(struct sctp_asconf_addrv4_param)) {
4834                                         printf("Sizeof setprim in init/init ack not %d but %d - ignored\n",
4835                                             (int)sizeof(struct sctp_asconf_addrv4_param),
4836                                             plen);
4837                                 } else {
4838                                         fii = (struct sctp_asconf_addrv4_param *)fee;
4839                                         sin.sin_addr.s_addr = fii->addrp.addr;
4840                                         lsa = (struct sockaddr *)&sin;
4841                                 }
4842                         } else if (lptype == SCTP_IPV6_ADDRESS) {
4843                                 if (plen !=
4844                                     sizeof(struct sctp_asconf_addr_param)) {
4845                                         printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
4846                                             (int)sizeof(struct sctp_asconf_addr_param),
4847                                             plen);
4848                                 } else {
4849                                         memcpy(sin6.sin6_addr.s6_addr,
4850                                             fee->addrp.addr,
4851                                             sizeof(fee->addrp.addr));
4852                                         lsa = (struct sockaddr *)&sin6;
4853                                 }
4854                         }
4855                         if (lsa) {
4856                                 sctp_set_primary_addr(stcb, sa, NULL);
4857                         }
4858                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
4859                         /* Peer supports pr-sctp */
4860                         stcb->asoc.peer_supports_prsctp = 1;
4861                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
4862                         /* A supported extension chunk */
4863                         struct sctp_supported_chunk_types_param *pr_supported;
4864                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
4865                         int num_ent, i;
4866
4867                         phdr = sctp_get_next_param(m, offset,
4868                             (struct sctp_paramhdr *)&local_store, plen);
4869                         if (phdr == NULL) {
4870                                 return (-25);
4871                         }
4872                         stcb->asoc.peer_supports_asconf = 0;
4873                         stcb->asoc.peer_supports_prsctp = 0;
4874                         stcb->asoc.peer_supports_pktdrop = 0;
4875                         stcb->asoc.peer_supports_strreset = 0;
4876                         stcb->asoc.peer_supports_auth = 0;
4877                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
4878                         num_ent = plen - sizeof(struct sctp_paramhdr);
4879                         for (i = 0; i < num_ent; i++) {
4880                                 switch (pr_supported->chunk_types[i]) {
4881                                 case SCTP_ASCONF:
4882                                 case SCTP_ASCONF_ACK:
4883                                         stcb->asoc.peer_supports_asconf = 1;
4884                                         break;
4885                                 case SCTP_FORWARD_CUM_TSN:
4886                                         stcb->asoc.peer_supports_prsctp = 1;
4887                                         break;
4888                                 case SCTP_PACKET_DROPPED:
4889                                         stcb->asoc.peer_supports_pktdrop = 1;
4890                                         break;
4891                                 case SCTP_STREAM_RESET:
4892                                         stcb->asoc.peer_supports_strreset = 1;
4893                                         break;
4894                                 case SCTP_AUTHENTICATION:
4895                                         stcb->asoc.peer_supports_auth = 1;
4896                                         break;
4897                                 default:
4898                                         /* one I have not learned yet */
4899                                         break;
4900
4901                                 }
4902                         }
4903                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
4904                         /* Peer supports ECN-nonce */
4905                         stcb->asoc.peer_supports_ecn_nonce = 1;
4906                         stcb->asoc.ecn_nonce_allowed = 1;
4907                 } else if (ptype == SCTP_RANDOM) {
4908                         if (plen > sizeof(random_store))
4909                                 break;
4910                         if (got_random) {
4911                                 /* already processed a RANDOM */
4912                                 goto next_param;
4913                         }
4914                         phdr = sctp_get_next_param(m, offset,
4915                             (struct sctp_paramhdr *)random_store,
4916                             plen);
4917                         if (phdr == NULL)
4918                                 return (-26);
4919                         p_random = (struct sctp_auth_random *)phdr;
4920                         random_len = plen - sizeof(*p_random);
4921                         /* enforce the random length */
4922                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
4923 #ifdef SCTP_DEBUG
4924                                 if (sctp_debug_on & SCTP_DEBUG_AUTH1)
4925                                         printf("SCTP: invalid RANDOM len\n");
4926 #endif
4927                                 return (-27);
4928                         }
4929                         got_random = 1;
4930                 } else if (ptype == SCTP_HMAC_LIST) {
4931                         int num_hmacs;
4932                         int i;
4933
4934                         if (plen > sizeof(hmacs_store))
4935                                 break;
4936                         if (got_hmacs) {
4937                                 /* already processed a HMAC list */
4938                                 goto next_param;
4939                         }
4940                         phdr = sctp_get_next_param(m, offset,
4941                             (struct sctp_paramhdr *)hmacs_store,
4942                             plen);
4943                         if (phdr == NULL)
4944                                 return (-28);
4945                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
4946                         hmacs_len = plen - sizeof(*hmacs);
4947                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
4948                         /* validate the hmac list */
4949                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
4950                                 return (-29);
4951                         }
4952                         if (stcb->asoc.peer_hmacs != NULL)
4953                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
4954                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
4955                         if (stcb->asoc.peer_hmacs != NULL) {
4956                                 for (i = 0; i < num_hmacs; i++) {
4957                                         sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
4958                                             ntohs(hmacs->hmac_ids[i]));
4959                                 }
4960                         }
4961                         got_hmacs = 1;
4962                 } else if (ptype == SCTP_CHUNK_LIST) {
4963                         int i;
4964
4965                         if (plen > sizeof(chunks_store))
4966                                 break;
4967                         if (got_chklist) {
4968                                 /* already processed a Chunks list */
4969                                 goto next_param;
4970                         }
4971                         phdr = sctp_get_next_param(m, offset,
4972                             (struct sctp_paramhdr *)chunks_store,
4973                             plen);
4974                         if (phdr == NULL)
4975                                 return (-30);
4976                         chunks = (struct sctp_auth_chunk_list *)phdr;
4977                         num_chunks = plen - sizeof(*chunks);
4978                         if (stcb->asoc.peer_auth_chunks != NULL)
4979                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
4980                         else
4981                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
4982                         for (i = 0; i < num_chunks; i++) {
4983                                 sctp_auth_add_chunk(chunks->chunk_types[i],
4984                                     stcb->asoc.peer_auth_chunks);
4985                         }
4986                         got_chklist = 1;
4987                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
4988                             (ptype == SCTP_STATE_COOKIE) ||
4989                             (ptype == SCTP_UNRECOG_PARAM) ||
4990                             (ptype == SCTP_COOKIE_PRESERVE) ||
4991                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
4992                             (ptype == SCTP_ADD_IP_ADDRESS) ||
4993                             (ptype == SCTP_DEL_IP_ADDRESS) ||
4994                             (ptype == SCTP_ERROR_CAUSE_IND) ||
4995                     (ptype == SCTP_SUCCESS_REPORT)) {
4996                          /* don't care */ ;
4997                 } else {
4998                         if ((ptype & 0x8000) == 0x0000) {
4999                                 /*
5000                                  * must stop processing the rest of the
5001                                  * param's. Any report bits were handled
5002                                  * with the call to
5003                                  * sctp_arethere_unrecognized_parameters()
5004                                  * when the INIT or INIT-ACK was first seen.
5005                                  */
5006                                 break;
5007                         }
5008                 }
5009 next_param:
5010                 offset += SCTP_SIZE32(plen);
5011                 if (offset >= limit) {
5012                         break;
5013                 }
5014                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5015                     sizeof(parm_buf));
5016         }
5017         /* Now check to see if we need to purge any addresses */
5018         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5019                 net_tmp = TAILQ_NEXT(net, sctp_next);
5020                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5021                     SCTP_ADDR_NOT_IN_ASSOC) {
5022                         /* This address has been removed from the asoc */
5023                         /* remove and free it */
5024                         stcb->asoc.numnets--;
5025                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5026                         sctp_free_remote_addr(net);
5027                         if (net == stcb->asoc.primary_destination) {
5028                                 stcb->asoc.primary_destination = NULL;
5029                                 sctp_select_primary_destination(stcb);
5030                         }
5031                 }
5032         }
5033         /* validate authentication required parameters */
5034         if (got_random && got_hmacs) {
5035                 stcb->asoc.peer_supports_auth = 1;
5036         } else {
5037                 stcb->asoc.peer_supports_auth = 0;
5038         }
5039         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5040                 /* peer does not support auth but sent a chunks list? */
5041                 return (-31);
5042         }
5043         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5044             !stcb->asoc.peer_supports_auth) {
5045                 /* peer supports asconf but not auth? */
5046                 return (-32);
5047         }
5048         /* concatenate the full random key */
5049 #ifdef SCTP_AUTH_DRAFT_04
5050         keylen = random_len;
5051         new_key = sctp_alloc_key(keylen);
5052         if (new_key != NULL) {
5053                 /* copy in the RANDOM */
5054                 if (p_random != NULL)
5055                         bcopy(p_random->random_data, new_key->key, random_len);
5056         }
5057 #else
5058         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5059             sizeof(*hmacs) + hmacs_len;
5060         new_key = sctp_alloc_key(keylen);
5061         if (new_key != NULL) {
5062                 /* copy in the RANDOM */
5063                 if (p_random != NULL) {
5064                         keylen = sizeof(*p_random) + random_len;
5065                         bcopy(p_random, new_key->key, keylen);
5066                 }
5067                 /* append in the AUTH chunks */
5068                 if (chunks != NULL) {
5069                         bcopy(chunks, new_key->key + keylen,
5070                             sizeof(*chunks) + num_chunks);
5071                         keylen += sizeof(*chunks) + num_chunks;
5072                 }
5073                 /* append in the HMACs */
5074                 if (hmacs != NULL) {
5075                         bcopy(hmacs, new_key->key + keylen,
5076                             sizeof(*hmacs) + hmacs_len);
5077                 }
5078         }
5079 #endif
5080         else {
5081                 /* failed to get memory for the key */
5082                 return (-33);
5083         }
5084         if (stcb->asoc.authinfo.peer_random != NULL)
5085                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5086         stcb->asoc.authinfo.peer_random = new_key;
5087 #ifdef SCTP_AUTH_DRAFT_04
5088         /* don't include the chunks and hmacs for draft -04 */
5089         stcb->asoc.authinfo.peer_random->keylen = random_len;
5090 #endif
5091         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5092         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5093
5094         return (0);
5095 }
5096
5097 int
5098 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5099     struct sctp_nets *net)
5100 {
5101         /* make sure the requested primary address exists in the assoc */
5102         if (net == NULL && sa)
5103                 net = sctp_findnet(stcb, sa);
5104
5105         if (net == NULL) {
5106                 /* didn't find the requested primary address! */
5107                 return (-1);
5108         } else {
5109                 /* set the primary address */
5110                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5111                         /* Must be confirmed, so queue to set */
5112                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5113                         return (0);
5114                 }
5115                 stcb->asoc.primary_destination = net;
5116                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5117                 net = TAILQ_FIRST(&stcb->asoc.nets);
5118                 if (net != stcb->asoc.primary_destination) {
5119                         /*
5120                          * first one on the list is NOT the primary
5121                          * sctp_cmpaddr() is much more efficent if the
5122                          * primary is the first on the list, make it so.
5123                          */
5124                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5125                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5126                 }
5127                 return (0);
5128         }
5129 }
5130
5131
5132 int
5133 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
5134 {
5135         /*
5136          * This function serves two purposes. It will see if a TAG can be
5137          * re-used and return 1 for yes it is ok and 0 for don't use that
5138          * tag. A secondary function it will do is purge out old tags that
5139          * can be removed.
5140          */
5141         struct sctpasochead *head;
5142         struct sctpvtaghead *chain;
5143         struct sctp_tagblock *twait_block;
5144         struct sctp_tcb *stcb;
5145         int i;
5146
5147         SCTP_INP_INFO_WLOCK();
5148         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5149         /* First is the vtag in use ? */
5150
5151         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5152             sctppcbinfo.hashasocmark)];
5153         if (head == NULL) {
5154                 goto check_restart;
5155         }
5156         LIST_FOREACH(stcb, head, sctp_asocs) {
5157
5158                 if (stcb->asoc.my_vtag == tag) {
5159                         /*
5160                          * We should remove this if and return 0 always if
5161                          * we want vtags unique across all endpoints. For
5162                          * now within a endpoint is ok.
5163                          */
5164                         if (inp == stcb->sctp_ep) {
5165                                 /* bad tag, in use */
5166                                 SCTP_INP_INFO_WUNLOCK();
5167                                 return (0);
5168                         }
5169                 }
5170         }
5171 check_restart:
5172         /* Now lets check the restart hash */
5173         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5174             sctppcbinfo.hashrestartmark)];
5175         if (head == NULL) {
5176                 goto check_time_wait;
5177         }
5178         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5179                 if (stcb->asoc.assoc_id == tag) {
5180                         /* candidate */
5181                         if (inp == stcb->sctp_ep) {
5182                                 /* bad tag, in use */
5183                                 SCTP_INP_INFO_WUNLOCK();
5184                                 return (0);
5185                         }
5186                 }
5187         }
5188 check_time_wait:
5189         /* Now what about timed wait ? */
5190         if (!SCTP_LIST_EMPTY(chain)) {
5191                 /*
5192                  * Block(s) are present, lets see if we have this tag in the
5193                  * list
5194                  */
5195                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5196                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5197                                 if (twait_block->vtag_block[i].v_tag == 0) {
5198                                         /* not used */
5199                                         continue;
5200                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
5201                                     now->tv_sec) {
5202                                         /* Audit expires this guy */
5203                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
5204                                         twait_block->vtag_block[i].v_tag = 0;
5205                                 } else if (twait_block->vtag_block[i].v_tag ==
5206                                     tag) {
5207                                         /* Bad tag, sorry :< */
5208                                         SCTP_INP_INFO_WUNLOCK();
5209                                         return (0);
5210                                 }
5211                         }
5212                 }
5213         }
5214         /* Not found, ok to use the tag */
5215         SCTP_INP_INFO_WUNLOCK();
5216         return (1);
5217 }
5218
5219
5220 static sctp_assoc_t reneged_asoc_ids[256];
5221 static uint8_t reneged_at = 0;
5222
5223
5224 static void
5225 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5226 {
5227         /*
5228          * We must hunt this association for MBUF's past the cumack (i.e.
5229          * out of order data that we can renege on).
5230          */
5231         struct sctp_association *asoc;
5232         struct sctp_tmit_chunk *chk, *nchk;
5233         uint32_t cumulative_tsn_p1, tsn;
5234         struct sctp_queued_to_read *ctl, *nctl;
5235         int cnt, strmat, gap;
5236
5237         /* We look for anything larger than the cum-ack + 1 */
5238
5239         SCTP_STAT_INCR(sctps_protocol_drain_calls);
5240         if (sctp_do_drain == 0) {
5241                 return;
5242         }
5243         asoc = &stcb->asoc;
5244         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5245                 /* none we can reneg on. */
5246                 return;
5247         }
5248         SCTP_STAT_INCR(sctps_protocol_drains_done);
5249         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5250         cnt = 0;
5251         /* First look in the re-assembly queue */
5252         chk = TAILQ_FIRST(&asoc->reasmqueue);
5253         while (chk) {
5254                 /* Get the next one */
5255                 nchk = TAILQ_NEXT(chk, sctp_next);
5256                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5257                     cumulative_tsn_p1, MAX_TSN)) {
5258                         /* Yep it is above cum-ack */
5259                         cnt++;
5260                         tsn = chk->rec.data.TSN_seq;
5261                         if (tsn >= asoc->mapping_array_base_tsn) {
5262                                 gap = tsn - asoc->mapping_array_base_tsn;
5263                         } else {
5264                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5265                                     tsn + 1;
5266                         }
5267                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5268                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5269                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5270                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5271                         if (chk->data) {
5272                                 sctp_m_freem(chk->data);
5273                                 chk->data = NULL;
5274                         }
5275                         sctp_free_remote_addr(chk->whoTo);
5276                         sctp_free_a_chunk(stcb, chk);
5277                 }
5278                 chk = nchk;
5279         }
5280         /* Ok that was fun, now we will drain all the inbound streams? */
5281         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5282                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5283                 while (ctl) {
5284                         nctl = TAILQ_NEXT(ctl, next);
5285                         if (compare_with_wrap(ctl->sinfo_tsn,
5286                             cumulative_tsn_p1, MAX_TSN)) {
5287                                 /* Yep it is above cum-ack */
5288                                 cnt++;
5289                                 tsn = ctl->sinfo_tsn;
5290                                 if (tsn >= asoc->mapping_array_base_tsn) {
5291                                         gap = tsn -
5292                                             asoc->mapping_array_base_tsn;
5293                                 } else {
5294                                         gap = (MAX_TSN -
5295                                             asoc->mapping_array_base_tsn) +
5296                                             tsn + 1;
5297                                 }
5298                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5299                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5300
5301                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5302                                     gap);
5303                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5304                                     ctl, next);
5305                                 if (ctl->data) {
5306                                         sctp_m_freem(ctl->data);
5307                                         ctl->data = NULL;
5308                                 }
5309                                 sctp_free_remote_addr(ctl->whoFrom);
5310                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5311                                 SCTP_DECR_READQ_COUNT();
5312                         }
5313                         ctl = nctl;
5314                 }
5315         }
5316         /*
5317          * Question, should we go through the delivery queue? The only
5318          * reason things are on here is the app not reading OR a p-d-api up.
5319          * An attacker COULD send enough in to initiate the PD-API and then
5320          * send a bunch of stuff to other streams... these would wind up on
5321          * the delivery queue.. and then we would not get to them. But in
5322          * order to do this I then have to back-track and un-deliver
5323          * sequence numbers in streams.. el-yucko. I think for now we will
5324          * NOT look at the delivery queue and leave it to be something to
5325          * consider later. An alternative would be to abort the P-D-API with
5326          * a notification and then deliver the data.... Or another method
5327          * might be to keep track of how many times the situation occurs and
5328          * if we see a possible attack underway just abort the association.
5329          */
5330 #ifdef SCTP_DEBUG
5331         if (sctp_debug_on & SCTP_DEBUG_PCB1) {
5332                 if (cnt) {
5333                         printf("Freed %d chunks from reneg harvest\n", cnt);
5334                 }
5335         }
5336 #endif                          /* SCTP_DEBUG */
5337         if (cnt) {
5338                 /*
5339                  * Now do we need to find a new
5340                  * asoc->highest_tsn_inside_map?
5341                  */
5342                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
5343                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
5344                 } else {
5345                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5346                             asoc->highest_tsn_inside_map + 1;
5347                 }
5348                 if (gap >= (asoc->mapping_array_size << 3)) {
5349                         /*
5350                          * Something bad happened or cum-ack and high were
5351                          * behind the base, but if so earlier checks should
5352                          * have found NO data... wierd... we will start at
5353                          * end of mapping array.
5354                          */
5355                         printf("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
5356                             (int)gap,
5357                             (int)(asoc->mapping_array_size << 3),
5358                             (int)asoc->highest_tsn_inside_map);
5359                         gap = asoc->mapping_array_size << 3;
5360                 }
5361                 while (gap > 0) {
5362                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
5363                                 /* found the new highest */
5364                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
5365                                 break;
5366                         }
5367                         gap--;
5368                 }
5369                 if (gap == 0) {
5370                         /* Nothing left in map */
5371                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
5372                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
5373                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
5374                 }
5375                 asoc->last_revoke_count = cnt;
5376                 SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
5377                 sctp_send_sack(stcb);
5378                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN);
5379                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
5380                 reneged_at++;
5381         }
5382         /*
5383          * Another issue, in un-setting the TSN's in the mapping array we
5384          * DID NOT adjust the higest_tsn marker.  This will cause one of two
5385          * things to occur. It may cause us to do extra work in checking for
5386          * our mapping array movement. More importantly it may cause us to
5387          * SACK every datagram. This may not be a bad thing though since we
5388          * will recover once we get our cum-ack above and all this stuff we
5389          * dumped recovered.
5390          */
5391 }
5392
5393 void
5394 sctp_drain()
5395 {
5396         /*
5397          * We must walk the PCB lists for ALL associations here. The system
5398          * is LOW on MBUF's and needs help. This is where reneging will
5399          * occur. We really hope this does NOT happen!
5400          */
5401         struct sctp_inpcb *inp;
5402         struct sctp_tcb *stcb;
5403
5404         SCTP_INP_INFO_RLOCK();
5405         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
5406                 /* For each endpoint */
5407                 SCTP_INP_RLOCK(inp);
5408                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5409                         /* For each association */
5410                         SCTP_TCB_LOCK(stcb);
5411                         sctp_drain_mbufs(inp, stcb);
5412                         SCTP_TCB_UNLOCK(stcb);
5413                 }
5414                 SCTP_INP_RUNLOCK(inp);
5415         }
5416         SCTP_INP_INFO_RUNLOCK();
5417 }
5418
5419 /*
5420  * start a new iterator
5421  * iterates through all endpoints and associations based on the pcb_state
5422  * flags and asoc_state.  "af" (mandatory) is executed for all matching
5423  * assocs and "ef" (optional) is executed when the iterator completes.
5424  * "inpf" (optional) is executed for each new endpoint as it is being
5425  * iterated through. inpe (optional) is called when the inp completes
5426  * its way through all the stcbs.
5427  */
5428 int
5429 sctp_initiate_iterator(inp_func inpf,
5430     asoc_func af,
5431     inp_func inpe,
5432     uint32_t pcb_state,
5433     uint32_t pcb_features,
5434     uint32_t asoc_state,
5435     void *argp,
5436     uint32_t argi,
5437     end_func ef,
5438     struct sctp_inpcb *s_inp,
5439     uint8_t chunk_output_off)
5440 {
5441         struct sctp_iterator *it = NULL;
5442
5443         if (af == NULL) {
5444                 return (-1);
5445         }
5446         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
5447             "Iterator");
5448         if (it == NULL) {
5449                 return (ENOMEM);
5450         }
5451         memset(it, 0, sizeof(*it));
5452         it->function_assoc = af;
5453         it->function_inp = inpf;
5454         if (inpf)
5455                 it->done_current_ep = 0;
5456         else
5457                 it->done_current_ep = 1;
5458         it->function_atend = ef;
5459         it->pointer = argp;
5460         it->val = argi;
5461         it->pcb_flags = pcb_state;
5462         it->pcb_features = pcb_features;
5463         it->asoc_state = asoc_state;
5464         it->function_inp_end = inpe;
5465         it->no_chunk_output = chunk_output_off;
5466         if (s_inp) {
5467                 it->inp = s_inp;
5468                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5469         } else {
5470                 SCTP_INP_INFO_RLOCK();
5471                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5472
5473                 SCTP_INP_INFO_RUNLOCK();
5474                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5475
5476         }
5477         SCTP_IPI_ITERATOR_WQ_LOCK();
5478         if (it->inp)
5479                 SCTP_INP_INCR_REF(it->inp);
5480         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5481 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5482         if (sctppcbinfo.iterator_running == 0) {
5483                 sctp_wakeup_iterator();
5484         }
5485         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5486 #else
5487         if (it->inp)
5488                 SCTP_INP_DECR_REF(it->inp);
5489         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5490         /* Init the timer */
5491         SCTP_OS_TIMER_INIT(&it->tmr.timer);
5492         /* add to the list of all iterators */
5493         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
5494             NULL, NULL);
5495 #endif
5496         return (0);
5497 }