sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2007, by 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 vrf_id)
 134 {
 135         struct sctp_vrf *vrf = NULL;
 136         struct sctp_vrflist *bucket;
 137
 138         /* First allocate the VRF structure */
 139         vrf = sctp_find_vrf(vrf_id);
 140         if (vrf) {
 141                 /* Already allocated */
 142                 return (vrf);
 143         }
 144         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 145             SCTP_M_VRF);
 146         if (vrf == NULL) {
 147                 /* No memory */
 148 #ifdef INVARIANTS
 149                 panic("No memory for VRF:%d", vrf_id);
 150 #endif
 151                 return (NULL);
 152         }
 153         /* setup the VRF */
 154         memset(vrf, 0, sizeof(struct sctp_vrf));
 155         vrf->vrf_id = vrf_id;
 156         LIST_INIT(&vrf->ifnlist);
 157         vrf->total_ifa_count = 0;
 158         vrf->refcount = 0;
 159         /* now also setup table ids */
 160         SCTP_INIT_VRF_TABLEID(vrf);
 161         /* Init the HASH of addresses */
 162         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 163             &vrf->vrf_addr_hashmark);
 164         if (vrf->vrf_addr_hash == NULL) {
 165                 /* No memory */
 166 #ifdef INVARIANTS
 167                 panic("No memory for VRF:%d", vrf_id);
 168 #endif
 169                 SCTP_FREE(vrf, SCTP_M_VRF);
 170                 return (NULL);
 171         }
 172         /* Add it to the hash table */
 173         bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
 174         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 175         atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1);
 176         return (vrf);
 177 }
 178
 179
 180 struct sctp_ifn *
 181 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 182 {
 183         struct sctp_ifn *sctp_ifnp;
 184         struct sctp_ifnlist *hash_ifn_head;
 185
 186         /*
 187          * We assume the lock is held for the addresses if thats wrong
 188          * problems could occur :-)
 189          */
 190         hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
 191         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 192                 if (sctp_ifnp->ifn_index == ifn_index) {
 193                         return (sctp_ifnp);
 194                 }
 195                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 196                         return (sctp_ifnp);
 197                 }
 198         }
 199         return (NULL);
 200 }
 201
 202
 203
 204 struct sctp_vrf *
 205 sctp_find_vrf(uint32_t vrf_id)
 206 {
 207         struct sctp_vrflist *bucket;
 208         struct sctp_vrf *liste;
 209
 210         bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
 211         LIST_FOREACH(liste, bucket, next_vrf) {
 212                 if (vrf_id == liste->vrf_id) {
 213                         return (liste);
 214                 }
 215         }
 216         return (NULL);
 217 }
 218
 219 void
 220 sctp_free_vrf(struct sctp_vrf *vrf)
 221 {
 222         int ret;
 223
 224         ret = atomic_fetchadd_int(&vrf->refcount, -1);
 225         if (ret == 1) {
 226                 /* We zero'd the count */
 227                 LIST_REMOVE(vrf, next_vrf);
 228                 SCTP_FREE(vrf, SCTP_M_VRF);
 229                 atomic_subtract_int(&sctppcbinfo.ipi_count_vrfs, 1);
 230         }
 231 }
 232
 233 void
 234 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 235 {
 236         int ret;
 237
 238         ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1);
 239         if (ret == 1) {
 240                 /* We zero'd the count */
 241                 if (sctp_ifnp->vrf) {
 242                         sctp_free_vrf(sctp_ifnp->vrf);
 243                 }
 244                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 245                 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1);
 246         }
 247 }
 248
 249 void
 250 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 251 {
 252         struct sctp_ifn *sctp_ifnp;
 253
 254         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 255         if (sctp_ifnp != NULL) {
 256                 sctp_ifnp->ifn_mtu = mtu;
 257         }
 258 }
 259
 260
 261 void
 262 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 263 {
 264         int ret;
 265
 266         ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1);
 267         if (ret == 1) {
 268                 /* We zero'd the count */
 269                 if (sctp_ifap->ifn_p) {
 270                         sctp_free_ifn(sctp_ifap->ifn_p);
 271                 }
 272                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 273                 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1);
 274         }
 275 }
 276
 277 static void
 278 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 279 {
 280         struct sctp_ifn *found;
 281
 282         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 283         if (found == NULL) {
 284                 /* Not in the list.. sorry */
 285                 return;
 286         }
 287         if (hold_addr_lock == 0)
 288                 SCTP_IPI_ADDR_LOCK();
 289         LIST_REMOVE(sctp_ifnp, next_bucket);
 290         LIST_REMOVE(sctp_ifnp, next_ifn);
 291         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 292             sctp_ifnp->registered_af);
 293         if (hold_addr_lock == 0)
 294                 SCTP_IPI_ADDR_UNLOCK();
 295         /* Take away the reference, and possibly free it */
 296         sctp_free_ifn(sctp_ifnp);
 297 }
 298
 299
 300 struct sctp_ifa *
 301 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 302     uint32_t ifn_type, const char *if_name,
 303     void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
 304     int dynamic_add)
 305 {
 306         struct sctp_vrf *vrf;
 307         struct sctp_ifn *sctp_ifnp = NULL;
 308         struct sctp_ifa *sctp_ifap = NULL;
 309         struct sctp_ifalist *hash_addr_head;
 310         struct sctp_ifnlist *hash_ifn_head;
 311         uint32_t hash_of_addr;
 312         int new_ifn_af = 0;
 313
 314         /* How granular do we need the locks to be here? */
 315         SCTP_IPI_ADDR_LOCK();
 316         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 317         if (sctp_ifnp) {
 318                 vrf = sctp_ifnp->vrf;
 319         } else {
 320                 vrf = sctp_find_vrf(vrf_id);
 321                 if (vrf == NULL) {
 322                         vrf = sctp_allocate_vrf(vrf_id);
 323                         if (vrf == NULL) {
 324                                 SCTP_IPI_ADDR_UNLOCK();
 325                                 return (NULL);
 326                         }
 327                 }
 328         }
 329         if (sctp_ifnp == NULL) {
 330                 /*
 331                  * build one and add it, can't hold lock until after malloc
 332                  * done though.
 333                  */
 334                 SCTP_IPI_ADDR_UNLOCK();
 335                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), SCTP_M_IFN);
 336                 if (sctp_ifnp == NULL) {
 337 #ifdef INVARIANTS
 338                         panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
 339 #endif
 340                         return (NULL);
 341                 }
 342                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 343                 sctp_ifnp->ifn_index = ifn_index;
 344                 sctp_ifnp->ifn_p = ifn;
 345                 sctp_ifnp->ifn_type = ifn_type;
 346                 sctp_ifnp->refcount = 1;
 347                 sctp_ifnp->vrf = vrf;
 348
 349                 atomic_add_int(&vrf->refcount, 1);
 350                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 351                 if (if_name != NULL) {
 352                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 353                 } else {
 354                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 355                 }
 356                 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
 357                 LIST_INIT(&sctp_ifnp->ifalist);
 358                 SCTP_IPI_ADDR_LOCK();
 359                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 360                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 361                 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1);
 362                 new_ifn_af = 1;
 363         }
 364         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
 365         if (sctp_ifap) {
 366                 /* Hmm, it already exists? */
 367                 if ((sctp_ifap->ifn_p) &&
 368                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 369                         if (new_ifn_af) {
 370                                 /* Remove the created one that we don't want */
 371                                 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
 372                         }
 373                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 374                                 /* easy to solve, just switch back to active */
 375                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 376                                 sctp_ifap->ifn_p = sctp_ifnp;
 377                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 378                 exit_stage_left:
 379                                 SCTP_IPI_ADDR_UNLOCK();
 380                                 return (sctp_ifap);
 381                         } else {
 382                                 goto exit_stage_left;
 383                         }
 384                 } else {
 385                         if (sctp_ifap->ifn_p) {
 386                                 /*
 387                                  * The first IFN gets the address,
 388                                  * duplicates are ignored.
 389                                  */
 390                                 if (new_ifn_af) {
 391                                         /*
 392                                          * Remove the created one that we
 393                                          * don't want
 394                                          */
 395                                         sctp_delete_ifn(sctp_ifap->ifn_p, 1);
 396                                 }
 397                                 goto exit_stage_left;
 398                         } else {
 399                                 /* repair ifnp which was NULL ? */
 400                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 401                                 sctp_ifap->ifn_p = sctp_ifnp;
 402                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 403                         }
 404                         goto exit_stage_left;
 405                 }
 406         }
 407         SCTP_IPI_ADDR_UNLOCK();
 408         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 409         if (sctp_ifap == NULL) {
 410 #ifdef INVARIANTS
 411                 panic("No memory for IFA");
 412 #endif
 413                 return (NULL);
 414         }
 415         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 416         sctp_ifap->ifn_p = sctp_ifnp;
 417         atomic_add_int(&sctp_ifnp->refcount, 1);
 418         sctp_ifap->vrf_id = vrf_id;
 419         sctp_ifap->ifa = ifa;
 420         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 421         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 422         sctp_ifap->flags = ifa_flags;
 423         /* Set scope */
 424         if (sctp_ifap->address.sa.sa_family == AF_INET) {
 425                 struct sockaddr_in *sin;
 426
 427                 sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 428                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 429                     (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 430                         sctp_ifap->src_is_loop = 1;
 431                 }
 432                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 433                         sctp_ifap->src_is_priv = 1;
 434                 }
 435                 sctp_ifnp->num_v4++;
 436                 if (new_ifn_af)
 437                         new_ifn_af = AF_INET;
 438         } else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
 439                 /* ok to use deprecated addresses? */
 440                 struct sockaddr_in6 *sin6;
 441
 442                 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 443                 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 444                     (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 445                         sctp_ifap->src_is_loop = 1;
 446                 }
 447                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 448                         sctp_ifap->src_is_priv = 1;
 449                 }
 450                 sctp_ifnp->num_v6++;
 451                 if (new_ifn_af)
 452                         new_ifn_af = AF_INET6;
 453         } else {
 454                 new_ifn_af = 0;
 455         }
 456         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 457
 458         if ((sctp_ifap->src_is_priv == 0) &&
 459             (sctp_ifap->src_is_loop == 0)) {
 460                 sctp_ifap->src_is_glob = 1;
 461         }
 462         SCTP_IPI_ADDR_LOCK();
 463         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 464         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 465         sctp_ifap->refcount = 1;
 466         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 467         sctp_ifnp->ifa_count++;
 468         vrf->total_ifa_count++;
 469         atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1);
 470         if (new_ifn_af) {
 471                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 472                 sctp_ifnp->registered_af = new_ifn_af;
 473         }
 474         SCTP_IPI_ADDR_UNLOCK();
 475         if (dynamic_add) {
 476                 /*
 477                  * Bump up the refcount so that when the timer completes it
 478                  * will drop back down.
 479                  */
 480                 struct sctp_laddr *wi;
 481
 482                 atomic_add_int(&sctp_ifap->refcount, 1);
 483                 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
 484                 if (wi == NULL) {
 485                         /*
 486                          * Gak, what can we do? We have lost an address
 487                          * change can you say HOSED?
 488                          */
 489                         SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n");
 490                         /* Opps, must decrement the count */
 491                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index);
 492                         return (NULL);
 493                 }
 494                 SCTP_INCR_LADDR_COUNT();
 495                 bzero(wi, sizeof(*wi));
 496                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 497                 wi->ifa = sctp_ifap;
 498                 wi->action = SCTP_ADD_IP_ADDRESS;
 499                 SCTP_IPI_ITERATOR_WQ_LOCK();
 500                 /*
 501                  * Should this really be a tailq? As it is we will process
 502                  * the newest first :-0
 503                  */
 504                 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
 505                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 506                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 507                     (struct sctp_inpcb *)NULL,
 508                     (struct sctp_tcb *)NULL,
 509                     (struct sctp_nets *)NULL);
 510         } else {
 511                 /* it's ready for use */
 512                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 513         }
 514         return (sctp_ifap);
 515 }
 516
 517 void
 518 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 519     uint32_t ifn_index)
 520 {
 521         struct sctp_vrf *vrf;
 522         struct sctp_ifa *sctp_ifap = NULL;
 523
 524         SCTP_IPI_ADDR_LOCK();
 525
 526         vrf = sctp_find_vrf(vrf_id);
 527         if (vrf == NULL) {
 528                 SCTP_PRINTF("Can't find vrf_id:%d\n", vrf_id);
 529                 goto out_now;
 530         }
 531         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1);
 532         if (sctp_ifap) {
 533                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 534                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 535                 vrf->total_ifa_count--;
 536                 LIST_REMOVE(sctp_ifap, next_bucket);
 537                 LIST_REMOVE(sctp_ifap, next_ifa);
 538                 if (sctp_ifap->ifn_p) {
 539                         sctp_ifap->ifn_p->ifa_count--;
 540                         if (sctp_ifap->address.sa.sa_family == AF_INET6)
 541                                 sctp_ifap->ifn_p->num_v6--;
 542                         else if (sctp_ifap->address.sa.sa_family == AF_INET)
 543                                 sctp_ifap->ifn_p->num_v4--;
 544                         if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 545                                 sctp_delete_ifn(sctp_ifap->ifn_p, 1);
 546                         } else {
 547                                 if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 548                                     (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 549                                         SCTP_DEREGISTER_INTERFACE(ifn_index,
 550                                             AF_INET6);
 551                                         SCTP_REGISTER_INTERFACE(ifn_index,
 552                                             AF_INET);
 553                                         sctp_ifap->ifn_p->registered_af = AF_INET;
 554                                 } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 555                                     (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 556                                         SCTP_DEREGISTER_INTERFACE(ifn_index,
 557                                             AF_INET);
 558                                         SCTP_REGISTER_INTERFACE(ifn_index,
 559                                             AF_INET6);
 560                                         sctp_ifap->ifn_p->registered_af = AF_INET6;
 561                                 }
 562                         }
 563                         sctp_free_ifn(sctp_ifap->ifn_p);
 564                         sctp_ifap->ifn_p = NULL;
 565                 }
 566         }
 567 #ifdef SCTP_DEBUG
 568         else {
 569                 SCTPDBG(SCTP_DEBUG_PCB1, "Del Addr-ifn:%d Could not find address:",
 570                     ifn_index);
 571                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 572         }
 573 #endif
 574
 575 out_now:
 576         SCTP_IPI_ADDR_UNLOCK();
 577         if (sctp_ifap) {
 578                 struct sctp_laddr *wi;
 579
 580                 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
 581                 if (wi == NULL) {
 582                         /*
 583                          * Gak, what can we do? We have lost an address
 584                          * change can you say HOSED?
 585                          */
 586                         SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n");
 587
 588                         /* Opps, must decrement the count */
 589                         sctp_free_ifa(sctp_ifap);
 590                         return;
 591                 }
 592                 SCTP_INCR_LADDR_COUNT();
 593                 bzero(wi, sizeof(*wi));
 594                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 595                 wi->ifa = sctp_ifap;
 596                 wi->action = SCTP_DEL_IP_ADDRESS;
 597                 SCTP_IPI_ITERATOR_WQ_LOCK();
 598                 /*
 599                  * Should this really be a tailq? As it is we will process
 600                  * the newest first :-0
 601                  */
 602                 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
 603                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 604
 605                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 606                     (struct sctp_inpcb *)NULL,
 607                     (struct sctp_tcb *)NULL,
 608                     (struct sctp_nets *)NULL);
 609         }
 610         return;
 611 }
 612
 613
 614
 615 static struct sctp_tcb *
 616 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 617     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 618 {
 619         /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
 620         /*
 621          * If we support the TCP model, then we must now dig through to see
 622          * if we can find our endpoint in the list of tcp ep's.
 623          */
 624         uint16_t lport, rport;
 625         struct sctppcbhead *ephead;
 626         struct sctp_inpcb *inp;
 627         struct sctp_laddr *laddr;
 628         struct sctp_tcb *stcb;
 629         struct sctp_nets *net;
 630
 631         if ((to == NULL) || (from == NULL)) {
 632                 return (NULL);
 633         }
 634         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 635                 lport = ((struct sockaddr_in *)to)->sin_port;
 636                 rport = ((struct sockaddr_in *)from)->sin_port;
 637         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 638                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 639                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 640         } else {
 641                 return NULL;
 642         }
 643         ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
 644             (lport + rport), sctppcbinfo.hashtcpmark)];
 645         /*
 646          * Ok now for each of the guys in this bucket we must look and see:
 647          * - Does the remote port match. - Does there single association's
 648          * addresses match this address (to). If so we update p_ep to point
 649          * to this ep and return the tcb from it.
 650          */
 651         LIST_FOREACH(inp, ephead, sctp_hash) {
 652                 SCTP_INP_RLOCK(inp);
 653                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 654                         SCTP_INP_RUNLOCK(inp);
 655                         continue;
 656                 }
 657                 if (lport != inp->sctp_lport) {
 658                         SCTP_INP_RUNLOCK(inp);
 659                         continue;
 660                 }
 661                 if (inp->def_vrf_id != vrf_id) {
 662                         SCTP_INP_RUNLOCK(inp);
 663                         continue;
 664                 }
 665                 /* check to see if the ep has one of the addresses */
 666                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 667                         /* We are NOT bound all, so look further */
 668                         int match = 0;
 669
 670                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 671
 672                                 if (laddr->ifa == NULL) {
 673                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 674                                         continue;
 675                                 }
 676                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 677                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 678                                         continue;
 679                                 }
 680                                 if (laddr->ifa->address.sa.sa_family ==
 681                                     to->sa_family) {
 682                                         /* see if it matches */
 683                                         struct sockaddr_in *intf_addr, *sin;
 684
 685                                         intf_addr = &laddr->ifa->address.sin;
 686                                         sin = (struct sockaddr_in *)to;
 687                                         if (from->sa_family == AF_INET) {
 688                                                 if (sin->sin_addr.s_addr ==
 689                                                     intf_addr->sin_addr.s_addr) {
 690                                                         match = 1;
 691                                                         break;
 692                                                 }
 693                                         } else {
 694                                                 struct sockaddr_in6 *intf_addr6;
 695                                                 struct sockaddr_in6 *sin6;
 696
 697                                                 sin6 = (struct sockaddr_in6 *)
 698                                                     to;
 699                                                 intf_addr6 = &laddr->ifa->address.sin6;
 700
 701                                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 702                                                     &intf_addr6->sin6_addr)) {
 703                                                         match = 1;
 704                                                         break;
 705                                                 }
 706                                         }
 707                                 }
 708                         }
 709                         if (match == 0) {
 710                                 /* This endpoint does not have this address */
 711                                 SCTP_INP_RUNLOCK(inp);
 712                                 continue;
 713                         }
 714                 }
 715                 /*
 716                  * Ok if we hit here the ep has the address, does it hold
 717                  * the tcb?
 718                  */
 719
 720                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 721                 if (stcb == NULL) {
 722                         SCTP_INP_RUNLOCK(inp);
 723                         continue;
 724                 }
 725                 SCTP_TCB_LOCK(stcb);
 726                 if (stcb->rport != rport) {
 727                         /* remote port does not match. */
 728                         SCTP_TCB_UNLOCK(stcb);
 729                         SCTP_INP_RUNLOCK(inp);
 730                         continue;
 731                 }
 732                 /* Does this TCB have a matching address? */
 733                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 734
 735                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 736                                 /* not the same family, can't be a match */
 737                                 continue;
 738                         }
 739                         if (from->sa_family == AF_INET) {
 740                                 struct sockaddr_in *sin, *rsin;
 741
 742                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
 743                                 rsin = (struct sockaddr_in *)from;
 744                                 if (sin->sin_addr.s_addr ==
 745                                     rsin->sin_addr.s_addr) {
 746                                         /* found it */
 747                                         if (netp != NULL) {
 748                                                 *netp = net;
 749                                         }
 750                                         /* Update the endpoint pointer */
 751                                         *inp_p = inp;
 752                                         SCTP_INP_RUNLOCK(inp);
 753                                         return (stcb);
 754                                 }
 755                         } else {
 756                                 struct sockaddr_in6 *sin6, *rsin6;
 757
 758                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 759                                 rsin6 = (struct sockaddr_in6 *)from;
 760                                 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 761                                     &rsin6->sin6_addr)) {
 762                                         /* found it */
 763                                         if (netp != NULL) {
 764                                                 *netp = net;
 765                                         }
 766                                         /* Update the endpoint pointer */
 767                                         *inp_p = inp;
 768                                         SCTP_INP_RUNLOCK(inp);
 769                                         return (stcb);
 770                                 }
 771                         }
 772                 }
 773                 SCTP_TCB_UNLOCK(stcb);
 774                 SCTP_INP_RUNLOCK(inp);
 775         }
 776         return (NULL);
 777 }
 778
 779 /*
 780  * rules for use
 781  *
 782  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
 783  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
 784  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
 785  * NULL.
 786  */
 787
 788 struct sctp_tcb *
 789 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
 790     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
 791 {
 792         struct sctpasochead *head;
 793         struct sctp_inpcb *inp;
 794         struct sctp_tcb *stcb = NULL;
 795         struct sctp_nets *net;
 796         uint16_t rport;
 797
 798         inp = *inp_p;
 799         if (remote->sa_family == AF_INET) {
 800                 rport = (((struct sockaddr_in *)remote)->sin_port);
 801         } else if (remote->sa_family == AF_INET6) {
 802                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
 803         } else {
 804                 return (NULL);
 805         }
 806         if (locked_tcb) {
 807                 /*
 808                  * UN-lock so we can do proper locking here this occurs when
 809                  * called from load_addresses_from_init.
 810                  */
 811                 SCTP_TCB_UNLOCK(locked_tcb);
 812         }
 813         SCTP_INP_INFO_RLOCK();
 814         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
 815                 /*-
 816                  * Now either this guy is our listener or it's the
 817                  * connector. If it is the one that issued the connect, then
 818                  * it's only chance is to be the first TCB in the list. If
 819                  * it is the acceptor, then do the special_lookup to hash
 820                  * and find the real inp.
 821                  */
 822                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
 823                         /* to is peer addr, from is my addr */
 824                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
 825                             netp, inp->def_vrf_id);
 826                         if ((stcb != NULL) && (locked_tcb == NULL)) {
 827                                 /* we have a locked tcb, lower refcount */
 828                                 SCTP_INP_WLOCK(inp);
 829                                 SCTP_INP_DECR_REF(inp);
 830                                 SCTP_INP_WUNLOCK(inp);
 831                         }
 832                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
 833                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
 834                                 SCTP_TCB_LOCK(locked_tcb);
 835                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
 836                         }
 837                         SCTP_INP_INFO_RUNLOCK();
 838                         return (stcb);
 839                 } else {
 840                         SCTP_INP_WLOCK(inp);
 841                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 842                                 goto null_return;
 843                         }
 844                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
 845                         if (stcb == NULL) {
 846                                 goto null_return;
 847                         }
 848                         SCTP_TCB_LOCK(stcb);
 849                         if (stcb->rport != rport) {
 850                                 /* remote port does not match. */
 851                                 SCTP_TCB_UNLOCK(stcb);
 852                                 goto null_return;
 853                         }
 854                         /* now look at the list of remote addresses */
 855                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 856 #ifdef INVARIANTS
 857                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 858                                         panic("Corrupt net list");
 859                                 }
 860 #endif
 861                                 if (net->ro._l_addr.sa.sa_family !=
 862                                     remote->sa_family) {
 863                                         /* not the same family */
 864                                         continue;
 865                                 }
 866                                 if (remote->sa_family == AF_INET) {
 867                                         struct sockaddr_in *sin, *rsin;
 868
 869                                         sin = (struct sockaddr_in *)
 870                                             &net->ro._l_addr;
 871                                         rsin = (struct sockaddr_in *)remote;
 872                                         if (sin->sin_addr.s_addr ==
 873                                             rsin->sin_addr.s_addr) {
 874                                                 /* found it */
 875                                                 if (netp != NULL) {
 876                                                         *netp = net;
 877                                                 }
 878                                                 if (locked_tcb == NULL) {
 879                                                         SCTP_INP_DECR_REF(inp);
 880                                                 } else if (locked_tcb != stcb) {
 881                                                         SCTP_TCB_LOCK(locked_tcb);
 882                                                 }
 883                                                 SCTP_INP_WUNLOCK(inp);
 884                                                 SCTP_INP_INFO_RUNLOCK();
 885                                                 return (stcb);
 886                                         }
 887                                 } else if (remote->sa_family == AF_INET6) {
 888                                         struct sockaddr_in6 *sin6, *rsin6;
 889
 890                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 891                                         rsin6 = (struct sockaddr_in6 *)remote;
 892                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 893                                             &rsin6->sin6_addr)) {
 894                                                 /* found it */
 895                                                 if (netp != NULL) {
 896                                                         *netp = net;
 897                                                 }
 898                                                 if (locked_tcb == NULL) {
 899                                                         SCTP_INP_DECR_REF(inp);
 900                                                 } else if (locked_tcb != stcb) {
 901                                                         SCTP_TCB_LOCK(locked_tcb);
 902                                                 }
 903                                                 SCTP_INP_WUNLOCK(inp);
 904                                                 SCTP_INP_INFO_RUNLOCK();
 905                                                 return (stcb);
 906                                         }
 907                                 }
 908                         }
 909                         SCTP_TCB_UNLOCK(stcb);
 910                 }
 911         } else {
 912                 SCTP_INP_WLOCK(inp);
 913                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 914                         goto null_return;
 915                 }
 916                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
 917                     inp->sctp_hashmark)];
 918                 if (head == NULL) {
 919                         goto null_return;
 920                 }
 921                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
 922                         if (stcb->rport != rport) {
 923                                 /* remote port does not match */
 924                                 continue;
 925                         }
 926                         /* now look at the list of remote addresses */
 927                         SCTP_TCB_LOCK(stcb);
 928                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 929 #ifdef INVARIANTS
 930                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
 931                                         panic("Corrupt net list");
 932                                 }
 933 #endif
 934                                 if (net->ro._l_addr.sa.sa_family !=
 935                                     remote->sa_family) {
 936                                         /* not the same family */
 937                                         continue;
 938                                 }
 939                                 if (remote->sa_family == AF_INET) {
 940                                         struct sockaddr_in *sin, *rsin;
 941
 942                                         sin = (struct sockaddr_in *)
 943                                             &net->ro._l_addr;
 944                                         rsin = (struct sockaddr_in *)remote;
 945                                         if (sin->sin_addr.s_addr ==
 946                                             rsin->sin_addr.s_addr) {
 947                                                 /* found it */
 948                                                 if (netp != NULL) {
 949                                                         *netp = net;
 950                                                 }
 951                                                 if (locked_tcb == NULL) {
 952                                                         SCTP_INP_DECR_REF(inp);
 953                                                 } else if (locked_tcb != stcb) {
 954                                                         SCTP_TCB_LOCK(locked_tcb);
 955                                                 }
 956                                                 SCTP_INP_WUNLOCK(inp);
 957                                                 SCTP_INP_INFO_RUNLOCK();
 958                                                 return (stcb);
 959                                         }
 960                                 } else if (remote->sa_family == AF_INET6) {
 961                                         struct sockaddr_in6 *sin6, *rsin6;
 962
 963                                         sin6 = (struct sockaddr_in6 *)
 964                                             &net->ro._l_addr;
 965                                         rsin6 = (struct sockaddr_in6 *)remote;
 966                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
 967                                             &rsin6->sin6_addr)) {
 968                                                 /* found it */
 969                                                 if (netp != NULL) {
 970                                                         *netp = net;
 971                                                 }
 972                                                 if (locked_tcb == NULL) {
 973                                                         SCTP_INP_DECR_REF(inp);
 974                                                 } else if (locked_tcb != stcb) {
 975                                                         SCTP_TCB_LOCK(locked_tcb);
 976                                                 }
 977                                                 SCTP_INP_WUNLOCK(inp);
 978                                                 SCTP_INP_INFO_RUNLOCK();
 979                                                 return (stcb);
 980                                         }
 981                                 }
 982                         }
 983                         SCTP_TCB_UNLOCK(stcb);
 984                 }
 985         }
 986 null_return:
 987         /* clean up for returning null */
 988         if (locked_tcb) {
 989                 SCTP_TCB_LOCK(locked_tcb);
 990         }
 991         SCTP_INP_WUNLOCK(inp);
 992         SCTP_INP_INFO_RUNLOCK();
 993         /* not found */
 994         return (NULL);
 995 }
 996
 997 /*
 998  * Find an association for a specific endpoint using the association id given
 999  * out in the COMM_UP notification
1000  */
1001
1002 struct sctp_tcb *
1003 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1004 {
1005         /*
1006          * Use my the assoc_id to find a endpoint
1007          */
1008         struct sctpasochead *head;
1009         struct sctp_tcb *stcb;
1010         uint32_t id;
1011
1012         if (asoc_id == 0 || inp == NULL) {
1013                 return (NULL);
1014         }
1015         SCTP_INP_INFO_RLOCK();
1016         id = (uint32_t) asoc_id;
1017         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
1018             sctppcbinfo.hashasocmark)];
1019         if (head == NULL) {
1020                 /* invalid id TSNH */
1021                 SCTP_INP_INFO_RUNLOCK();
1022                 return (NULL);
1023         }
1024         LIST_FOREACH(stcb, head, sctp_asocs) {
1025                 SCTP_INP_RLOCK(stcb->sctp_ep);
1026                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1027                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1028                         SCTP_INP_INFO_RUNLOCK();
1029                         return (NULL);
1030                 }
1031                 if (stcb->asoc.assoc_id == id) {
1032                         /* candidate */
1033                         if (inp != stcb->sctp_ep) {
1034                                 /*
1035                                  * some other guy has the same id active (id
1036                                  * collision ??).
1037                                  */
1038                                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1039                                 continue;
1040                         }
1041                         if (want_lock) {
1042                                 SCTP_TCB_LOCK(stcb);
1043                         }
1044                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1045                         SCTP_INP_INFO_RUNLOCK();
1046                         return (stcb);
1047                 }
1048                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1049         }
1050         /* Ok if we missed here, lets try the restart hash */
1051         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
1052         if (head == NULL) {
1053                 /* invalid id TSNH */
1054                 SCTP_INP_INFO_RUNLOCK();
1055                 return (NULL);
1056         }
1057         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
1058                 SCTP_INP_RLOCK(stcb->sctp_ep);
1059                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1060                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1061                         continue;
1062                 }
1063                 if (want_lock) {
1064                         SCTP_TCB_LOCK(stcb);
1065                 }
1066                 if (stcb->asoc.assoc_id == id) {
1067                         /* candidate */
1068                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1069                         if (inp != stcb->sctp_ep) {
1070                                 /*
1071                                  * some other guy has the same id active (id
1072                                  * collision ??).
1073                                  */
1074                                 if (want_lock) {
1075                                         SCTP_TCB_UNLOCK(stcb);
1076                                 }
1077                                 continue;
1078                         }
1079                         SCTP_INP_INFO_RUNLOCK();
1080                         return (stcb);
1081                 } else {
1082                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1083                 }
1084                 if (want_lock) {
1085                         SCTP_TCB_UNLOCK(stcb);
1086                 }
1087         }
1088         SCTP_INP_INFO_RUNLOCK();
1089         return (NULL);
1090 }
1091
1092
1093 static struct sctp_inpcb *
1094 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1095     uint16_t lport, uint32_t vrf_id)
1096 {
1097         struct sctp_inpcb *inp;
1098         struct sockaddr_in *sin;
1099         struct sockaddr_in6 *sin6;
1100         struct sctp_laddr *laddr;
1101         int fnd;
1102
1103         /*
1104          * Endpoing probe expects that the INP_INFO is locked.
1105          */
1106         if (nam->sa_family == AF_INET) {
1107                 sin = (struct sockaddr_in *)nam;
1108                 sin6 = NULL;
1109         } else if (nam->sa_family == AF_INET6) {
1110                 sin6 = (struct sockaddr_in6 *)nam;
1111                 sin = NULL;
1112         } else {
1113                 /* unsupported family */
1114                 return (NULL);
1115         }
1116         if (head == NULL)
1117                 return (NULL);
1118         LIST_FOREACH(inp, head, sctp_hash) {
1119                 SCTP_INP_RLOCK(inp);
1120                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1121                         SCTP_INP_RUNLOCK(inp);
1122                         continue;
1123                 }
1124                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1125                     (inp->sctp_lport == lport)) {
1126                         /* got it */
1127                         if ((nam->sa_family == AF_INET) &&
1128                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1129                             SCTP_IPV6_V6ONLY(inp)) {
1130                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1131                                 SCTP_INP_RUNLOCK(inp);
1132                                 continue;
1133                         }
1134                         /* A V6 address and the endpoint is NOT bound V6 */
1135                         if (nam->sa_family == AF_INET6 &&
1136                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1137                                 SCTP_INP_RUNLOCK(inp);
1138                                 continue;
1139                         }
1140                         /* does a VRF id match? */
1141                         fnd = 0;
1142                         if (inp->def_vrf_id == vrf_id)
1143                                 fnd = 1;
1144
1145                         SCTP_INP_RUNLOCK(inp);
1146                         if (!fnd)
1147                                 continue;
1148                         return (inp);
1149                 }
1150                 SCTP_INP_RUNLOCK(inp);
1151         }
1152
1153         if ((nam->sa_family == AF_INET) &&
1154             (sin->sin_addr.s_addr == INADDR_ANY)) {
1155                 /* Can't hunt for one that has no address specified */
1156                 return (NULL);
1157         } else if ((nam->sa_family == AF_INET6) &&
1158             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1159                 /* Can't hunt for one that has no address specified */
1160                 return (NULL);
1161         }
1162         /*
1163          * ok, not bound to all so see if we can find a EP bound to this
1164          * address.
1165          */
1166         LIST_FOREACH(inp, head, sctp_hash) {
1167                 SCTP_INP_RLOCK(inp);
1168                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1169                         SCTP_INP_RUNLOCK(inp);
1170                         continue;
1171                 }
1172                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 /*
1177                  * Ok this could be a likely candidate, look at all of its
1178                  * addresses
1179                  */
1180                 if (inp->sctp_lport != lport) {
1181                         SCTP_INP_RUNLOCK(inp);
1182                         continue;
1183                 }
1184                 /* does a VRF id match? */
1185                 fnd = 0;
1186                 if (inp->def_vrf_id == vrf_id)
1187                         fnd = 1;
1188
1189                 if (!fnd) {
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1194                         if (laddr->ifa == NULL) {
1195                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1196                                     __FUNCTION__);
1197                                 continue;
1198                         }
1199                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1200                             laddr->ifa);
1201                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1202                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1203                                 continue;
1204                         }
1205                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1206                                 /* possible, see if it matches */
1207                                 struct sockaddr_in *intf_addr;
1208
1209                                 intf_addr = &laddr->ifa->address.sin;
1210                                 if (nam->sa_family == AF_INET) {
1211                                         if (sin->sin_addr.s_addr ==
1212                                             intf_addr->sin_addr.s_addr) {
1213                                                 SCTP_INP_RUNLOCK(inp);
1214                                                 return (inp);
1215                                         }
1216                                 } else if (nam->sa_family == AF_INET6) {
1217                                         struct sockaddr_in6 *intf_addr6;
1218
1219                                         intf_addr6 = &laddr->ifa->address.sin6;
1220                                         if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
1221                                             &intf_addr6->sin6_addr)) {
1222                                                 SCTP_INP_RUNLOCK(inp);
1223                                                 return (inp);
1224                                         }
1225                                 }
1226                         }
1227                 }
1228                 SCTP_INP_RUNLOCK(inp);
1229         }
1230         return (NULL);
1231 }
1232
1233
1234 struct sctp_inpcb *
1235 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1236     uint32_t vrf_id)
1237 {
1238         /*
1239          * First we check the hash table to see if someone has this port
1240          * bound with just the port.
1241          */
1242         struct sctp_inpcb *inp;
1243         struct sctppcbhead *head;
1244         struct sockaddr_in *sin;
1245         struct sockaddr_in6 *sin6;
1246         int lport;
1247
1248         if (nam->sa_family == AF_INET) {
1249                 sin = (struct sockaddr_in *)nam;
1250                 lport = ((struct sockaddr_in *)nam)->sin_port;
1251         } else if (nam->sa_family == AF_INET6) {
1252                 sin6 = (struct sockaddr_in6 *)nam;
1253                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1254         } else {
1255                 /* unsupported family */
1256                 return (NULL);
1257         }
1258         /*
1259          * I could cheat here and just cast to one of the types but we will
1260          * do it right. It also provides the check against an Unsupported
1261          * type too.
1262          */
1263         /* Find the head of the ALLADDR chain */
1264         if (have_lock == 0) {
1265                 SCTP_INP_INFO_RLOCK();
1266
1267         }
1268         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
1269             sctppcbinfo.hashmark)];
1270         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1271
1272         /*
1273          * If the TCP model exists it could be that the main listening
1274          * endpoint is gone but there exists a connected socket for this guy
1275          * yet. If so we can return the first one that we find. This may NOT
1276          * be the correct one but the sctp_findassociation_ep_addr has
1277          * further code to look at all TCP models.
1278          */
1279         if (inp == NULL && find_tcp_pool) {
1280                 unsigned int i;
1281
1282                 for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
1283                         /*
1284                          * This is real gross, but we do NOT have a remote
1285                          * port at this point depending on who is calling.
1286                          * We must therefore look for ANY one that matches
1287                          * our local port :/
1288                          */
1289                         head = &sctppcbinfo.sctp_tcpephash[i];
1290                         if (LIST_FIRST(head)) {
1291                                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1292                                 if (inp) {
1293                                         /* Found one */
1294                                         break;
1295                                 }
1296                         }
1297                 }
1298         }
1299         if (inp) {
1300                 SCTP_INP_INCR_REF(inp);
1301         }
1302         if (have_lock == 0) {
1303                 SCTP_INP_INFO_RUNLOCK();
1304         }
1305         return (inp);
1306 }
1307
1308 /*
1309  * Find an association for an endpoint with the pointer to whom you want to
1310  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1311  * need to change the *to to some other struct like a mbuf...
1312  */
1313 struct sctp_tcb *
1314 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1315     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1316     uint32_t vrf_id)
1317 {
1318         struct sctp_inpcb *inp = NULL;
1319         struct sctp_tcb *retval;
1320
1321         SCTP_INP_INFO_RLOCK();
1322         if (find_tcp_pool) {
1323                 if (inp_p != NULL) {
1324                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1325                             vrf_id);
1326                 } else {
1327                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1328                             vrf_id);
1329                 }
1330                 if (retval != NULL) {
1331                         SCTP_INP_INFO_RUNLOCK();
1332                         return (retval);
1333                 }
1334         }
1335         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1336         if (inp_p != NULL) {
1337                 *inp_p = inp;
1338         }
1339         SCTP_INP_INFO_RUNLOCK();
1340
1341         if (inp == NULL) {
1342                 return (NULL);
1343         }
1344         /*
1345          * ok, we have an endpoint, now lets find the assoc for it (if any)
1346          * we now place the source address or from in the to of the find
1347          * endpoint call. Since in reality this chain is used from the
1348          * inbound packet side.
1349          */
1350         if (inp_p != NULL) {
1351                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1352                     NULL);
1353         } else {
1354                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1355                     NULL);
1356         }
1357         return retval;
1358 }
1359
1360
1361 /*
1362  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1363  * find all addresses that the sender has specified in any address list. Each
1364  * address will be used to lookup the TCB and see if one exits.
1365  */
1366 static struct sctp_tcb *
1367 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1368     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1369     struct sockaddr *dest)
1370 {
1371         struct sockaddr_in sin4;
1372         struct sockaddr_in6 sin6;
1373         struct sctp_paramhdr *phdr, parm_buf;
1374         struct sctp_tcb *retval;
1375         uint32_t ptype, plen;
1376
1377         memset(&sin4, 0, sizeof(sin4));
1378         memset(&sin6, 0, sizeof(sin6));
1379         sin4.sin_len = sizeof(sin4);
1380         sin4.sin_family = AF_INET;
1381         sin4.sin_port = sh->src_port;
1382         sin6.sin6_len = sizeof(sin6);
1383         sin6.sin6_family = AF_INET6;
1384         sin6.sin6_port = sh->src_port;
1385
1386         retval = NULL;
1387         offset += sizeof(struct sctp_init_chunk);
1388
1389         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1390         while (phdr != NULL) {
1391                 /* now we must see if we want the parameter */
1392                 ptype = ntohs(phdr->param_type);
1393                 plen = ntohs(phdr->param_length);
1394                 if (plen == 0) {
1395                         break;
1396                 }
1397                 if (ptype == SCTP_IPV4_ADDRESS &&
1398                     plen == sizeof(struct sctp_ipv4addr_param)) {
1399                         /* Get the rest of the address */
1400                         struct sctp_ipv4addr_param ip4_parm, *p4;
1401
1402                         phdr = sctp_get_next_param(m, offset,
1403                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1404                         if (phdr == NULL) {
1405                                 return (NULL);
1406                         }
1407                         p4 = (struct sctp_ipv4addr_param *)phdr;
1408                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1409                         /* look it up */
1410                         retval = sctp_findassociation_ep_addr(inp_p,
1411                             (struct sockaddr *)&sin4, netp, dest, NULL);
1412                         if (retval != NULL) {
1413                                 return (retval);
1414                         }
1415                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1416                     plen == sizeof(struct sctp_ipv6addr_param)) {
1417                         /* Get the rest of the address */
1418                         struct sctp_ipv6addr_param ip6_parm, *p6;
1419
1420                         phdr = sctp_get_next_param(m, offset,
1421                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1422                         if (phdr == NULL) {
1423                                 return (NULL);
1424                         }
1425                         p6 = (struct sctp_ipv6addr_param *)phdr;
1426                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1427                         /* look it up */
1428                         retval = sctp_findassociation_ep_addr(inp_p,
1429                             (struct sockaddr *)&sin6, netp, dest, NULL);
1430                         if (retval != NULL) {
1431                                 return (retval);
1432                         }
1433                 }
1434                 offset += SCTP_SIZE32(plen);
1435                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1436                     sizeof(parm_buf));
1437         }
1438         return (NULL);
1439 }
1440
1441
1442 static struct sctp_tcb *
1443 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
1444     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1445     uint16_t lport, int skip_src_check)
1446 {
1447         /*
1448          * Use my vtag to hash. If we find it we then verify the source addr
1449          * is in the assoc. If all goes well we save a bit on rec of a
1450          * packet.
1451          */
1452         struct sctpasochead *head;
1453         struct sctp_nets *net;
1454         struct sctp_tcb *stcb;
1455
1456         *netp = NULL;
1457         *inp_p = NULL;
1458         SCTP_INP_INFO_RLOCK();
1459         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
1460             sctppcbinfo.hashasocmark)];
1461         if (head == NULL) {
1462                 /* invalid vtag */
1463                 SCTP_INP_INFO_RUNLOCK();
1464                 return (NULL);
1465         }
1466         LIST_FOREACH(stcb, head, sctp_asocs) {
1467                 SCTP_INP_RLOCK(stcb->sctp_ep);
1468                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1469                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1470                         continue;
1471                 }
1472                 SCTP_TCB_LOCK(stcb);
1473                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1474                 if (stcb->asoc.my_vtag == vtag) {
1475                         /* candidate */
1476                         if (stcb->rport != rport) {
1477                                 /*
1478                                  * we could remove this if vtags are unique
1479                                  * across the system.
1480                                  */
1481                                 SCTP_TCB_UNLOCK(stcb);
1482                                 continue;
1483                         }
1484                         if (stcb->sctp_ep->sctp_lport != lport) {
1485                                 /*
1486                                  * we could remove this if vtags are unique
1487                                  * across the system.
1488                                  */
1489                                 SCTP_TCB_UNLOCK(stcb);
1490                                 continue;
1491                         }
1492                         if (skip_src_check) {
1493                                 *netp = NULL;   /* unknown */
1494                                 if (inp_p)
1495                                         *inp_p = stcb->sctp_ep;
1496                                 SCTP_INP_INFO_RUNLOCK();
1497                                 return (stcb);
1498                         }
1499                         net = sctp_findnet(stcb, from);
1500                         if (net) {
1501                                 /* yep its him. */
1502                                 *netp = net;
1503                                 SCTP_STAT_INCR(sctps_vtagexpress);
1504                                 *inp_p = stcb->sctp_ep;
1505                                 SCTP_INP_INFO_RUNLOCK();
1506                                 return (stcb);
1507                         } else {
1508                                 /*
1509                                  * not him, this should only happen in rare
1510                                  * cases so I peg it.
1511                                  */
1512                                 SCTP_STAT_INCR(sctps_vtagbogus);
1513                         }
1514                 }
1515                 SCTP_TCB_UNLOCK(stcb);
1516         }
1517         SCTP_INP_INFO_RUNLOCK();
1518         return (NULL);
1519 }
1520
1521 /*
1522  * Find an association with the pointer to the inbound IP packet. This can be
1523  * a IPv4 or IPv6 packet.
1524  */
1525 struct sctp_tcb *
1526 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1527     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1528     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1529 {
1530         int find_tcp_pool;
1531         struct ip *iph;
1532         struct sctp_tcb *retval;
1533         struct sockaddr_storage to_store, from_store;
1534         struct sockaddr *to = (struct sockaddr *)&to_store;
1535         struct sockaddr *from = (struct sockaddr *)&from_store;
1536         struct sctp_inpcb *inp;
1537
1538         iph = mtod(m, struct ip *);
1539         if (iph->ip_v == IPVERSION) {
1540                 /* its IPv4 */
1541                 struct sockaddr_in *from4;
1542
1543                 from4 = (struct sockaddr_in *)&from_store;
1544                 bzero(from4, sizeof(*from4));
1545                 from4->sin_family = AF_INET;
1546                 from4->sin_len = sizeof(struct sockaddr_in);
1547                 from4->sin_addr.s_addr = iph->ip_src.s_addr;
1548                 from4->sin_port = sh->src_port;
1549         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1550                 /* its IPv6 */
1551                 struct ip6_hdr *ip6;
1552                 struct sockaddr_in6 *from6;
1553
1554                 ip6 = mtod(m, struct ip6_hdr *);
1555                 from6 = (struct sockaddr_in6 *)&from_store;
1556                 bzero(from6, sizeof(*from6));
1557                 from6->sin6_family = AF_INET6;
1558                 from6->sin6_len = sizeof(struct sockaddr_in6);
1559                 from6->sin6_addr = ip6->ip6_src;
1560                 from6->sin6_port = sh->src_port;
1561                 /* Get the scopes in properly to the sin6 addr's */
1562                 /* we probably don't need these operations */
1563                 (void)sa6_recoverscope(from6);
1564                 sa6_embedscope(from6, ip6_use_defzone);
1565         } else {
1566                 /* Currently not supported. */
1567                 return (NULL);
1568         }
1569         if (sh->v_tag) {
1570                 /* we only go down this path if vtag is non-zero */
1571                 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
1572                     inp_p, netp, sh->src_port, sh->dest_port, 0);
1573                 if (retval) {
1574                         return (retval);
1575                 }
1576         }
1577         if (iph->ip_v == IPVERSION) {
1578                 /* its IPv4 */
1579                 struct sockaddr_in *to4;
1580
1581                 to4 = (struct sockaddr_in *)&to_store;
1582                 bzero(to4, sizeof(*to4));
1583                 to4->sin_family = AF_INET;
1584                 to4->sin_len = sizeof(struct sockaddr_in);
1585                 to4->sin_addr.s_addr = iph->ip_dst.s_addr;
1586                 to4->sin_port = sh->dest_port;
1587         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1588                 /* its IPv6 */
1589                 struct ip6_hdr *ip6;
1590                 struct sockaddr_in6 *to6;
1591
1592                 ip6 = mtod(m, struct ip6_hdr *);
1593                 to6 = (struct sockaddr_in6 *)&to_store;
1594                 bzero(to6, sizeof(*to6));
1595                 to6->sin6_family = AF_INET6;
1596                 to6->sin6_len = sizeof(struct sockaddr_in6);
1597                 to6->sin6_addr = ip6->ip6_dst;
1598                 to6->sin6_port = sh->dest_port;
1599                 /* Get the scopes in properly to the sin6 addr's */
1600                 /* we probably don't need these operations */
1601                 (void)sa6_recoverscope(to6);
1602                 sa6_embedscope(to6, ip6_use_defzone);
1603         }
1604         find_tcp_pool = 0;
1605         if ((ch->chunk_type != SCTP_INITIATION) &&
1606             (ch->chunk_type != SCTP_INITIATION_ACK) &&
1607             (ch->chunk_type != SCTP_COOKIE_ACK) &&
1608             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
1609                 /* Other chunk types go to the tcp pool. */
1610                 find_tcp_pool = 1;
1611         }
1612         if (inp_p) {
1613                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
1614                     find_tcp_pool, vrf_id);
1615                 inp = *inp_p;
1616         } else {
1617                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
1618                     find_tcp_pool, vrf_id);
1619         }
1620         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
1621         if (retval == NULL && inp) {
1622                 /* Found a EP but not this address */
1623                 if ((ch->chunk_type == SCTP_INITIATION) ||
1624                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
1625                         /*-
1626                          * special hook, we do NOT return linp or an
1627                          * association that is linked to an existing
1628                          * association that is under the TCP pool (i.e. no
1629                          * listener exists). The endpoint finding routine
1630                          * will always find a listner before examining the
1631                          * TCP pool.
1632                          */
1633                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
1634                                 if (inp_p) {
1635                                         *inp_p = NULL;
1636                                 }
1637                                 return (NULL);
1638                         }
1639                         retval = sctp_findassociation_special_addr(m, iphlen,
1640                             offset, sh, &inp, netp, to);
1641                         if (inp_p != NULL) {
1642                                 *inp_p = inp;
1643                         }
1644                 }
1645         }
1646         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
1647         return (retval);
1648 }
1649
1650 /*
1651  * lookup an association by an ASCONF lookup address.
1652  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
1653  */
1654 struct sctp_tcb *
1655 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
1656     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
1657 {
1658         struct sctp_tcb *stcb;
1659         struct sockaddr_in *sin;
1660         struct sockaddr_in6 *sin6;
1661         struct sockaddr_storage local_store, remote_store;
1662         struct ip *iph;
1663         struct sctp_paramhdr parm_buf, *phdr;
1664         int ptype;
1665         int zero_address = 0;
1666
1667
1668         memset(&local_store, 0, sizeof(local_store));
1669         memset(&remote_store, 0, sizeof(remote_store));
1670
1671         /* First get the destination address setup too. */
1672         iph = mtod(m, struct ip *);
1673         if (iph->ip_v == IPVERSION) {
1674                 /* its IPv4 */
1675                 sin = (struct sockaddr_in *)&local_store;
1676                 sin->sin_family = AF_INET;
1677                 sin->sin_len = sizeof(*sin);
1678                 sin->sin_port = sh->dest_port;
1679                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
1680         } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
1681                 /* its IPv6 */
1682                 struct ip6_hdr *ip6;
1683
1684                 ip6 = mtod(m, struct ip6_hdr *);
1685                 sin6 = (struct sockaddr_in6 *)&local_store;
1686                 sin6->sin6_family = AF_INET6;
1687                 sin6->sin6_len = sizeof(*sin6);
1688                 sin6->sin6_port = sh->dest_port;
1689                 sin6->sin6_addr = ip6->ip6_dst;
1690         } else {
1691                 return NULL;
1692         }
1693
1694         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
1695             &parm_buf, sizeof(struct sctp_paramhdr));
1696         if (phdr == NULL) {
1697                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
1698                     __FUNCTION__);
1699                 return NULL;
1700         }
1701         ptype = (int)((uint32_t) ntohs(phdr->param_type));
1702         /* get the correlation address */
1703         if (ptype == SCTP_IPV6_ADDRESS) {
1704                 /* ipv6 address param */
1705                 struct sctp_ipv6addr_param *p6, p6_buf;
1706
1707                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
1708                         return NULL;
1709                 }
1710                 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
1711                     offset + sizeof(struct sctp_asconf_chunk),
1712                     &p6_buf.ph, sizeof(*p6));
1713                 if (p6 == NULL) {
1714                         SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
1715                             __FUNCTION__);
1716                         return (NULL);
1717                 }
1718                 sin6 = (struct sockaddr_in6 *)&remote_store;
1719                 sin6->sin6_family = AF_INET6;
1720                 sin6->sin6_len = sizeof(*sin6);
1721                 sin6->sin6_port = sh->src_port;
1722                 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
1723                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1724                         zero_address = 1;
1725         } else if (ptype == SCTP_IPV4_ADDRESS) {
1726                 /* ipv4 address param */
1727                 struct sctp_ipv4addr_param *p4, p4_buf;
1728
1729                 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
1730                         return NULL;
1731                 }
1732                 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
1733                     offset + sizeof(struct sctp_asconf_chunk),
1734                     &p4_buf.ph, sizeof(*p4));
1735                 if (p4 == NULL) {
1736                         SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
1737                             __FUNCTION__);
1738                         return (NULL);
1739                 }
1740                 sin = (struct sockaddr_in *)&remote_store;
1741                 sin->sin_family = AF_INET;
1742                 sin->sin_len = sizeof(*sin);
1743                 sin->sin_port = sh->src_port;
1744                 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
1745                 if (sin->sin_addr.s_addr == INADDR_ANY)
1746                         zero_address = 1;
1747         } else {
1748                 /* invalid address param type */
1749                 return NULL;
1750         }
1751
1752         if (zero_address) {
1753                 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
1754                     netp, sh->src_port, sh->dest_port, 1);
1755                 /*
1756                  * printf("findassociation_ep_asconf: zero lookup address
1757                  * finds stcb 0x%x\n", (uint32_t)stcb);
1758                  */
1759         } else {
1760                 stcb = sctp_findassociation_ep_addr(inp_p,
1761                     (struct sockaddr *)&remote_store, netp,
1762                     (struct sockaddr *)&local_store, NULL);
1763         }
1764         return (stcb);
1765 }
1766
1767
1768 /*
1769  * allocate a sctp_inpcb and setup a temporary binding to a port/all
1770  * addresses. This way if we don't get a bind we by default pick a ephemeral
1771  * port with all addresses bound.
1772  */
1773 int
1774 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
1775 {
1776         /*
1777          * we get called when a new endpoint starts up. We need to allocate
1778          * the sctp_inpcb structure from the zone and init it. Mark it as
1779          * unbound and find a port that we can use as an ephemeral with
1780          * INADDR_ANY. If the user binds later no problem we can then add in
1781          * the specific addresses. And setup the default parameters for the
1782          * EP.
1783          */
1784         int i, error;
1785         struct sctp_inpcb *inp;
1786         struct sctp_pcb *m;
1787         struct timeval time;
1788         sctp_sharedkey_t *null_key;
1789
1790         error = 0;
1791
1792         SCTP_INP_INFO_WLOCK();
1793         inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb);
1794         if (inp == NULL) {
1795                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
1796                 SCTP_INP_INFO_WUNLOCK();
1797                 return (ENOBUFS);
1798         }
1799         /* zap it */
1800         bzero(inp, sizeof(*inp));
1801
1802         /* bump generations */
1803         /* setup socket pointers */
1804         inp->sctp_socket = so;
1805         inp->ip_inp.inp.inp_socket = so;
1806
1807         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
1808         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
1809
1810 #ifdef IPSEC
1811         {
1812                 struct inpcbpolicy *pcb_sp = NULL;
1813
1814                 error = ipsec_init_policy(so, &pcb_sp);
1815                 /* Arrange to share the policy */
1816                 inp->ip_inp.inp.inp_sp = pcb_sp;
1817                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
1818         }
1819         if (error != 0) {
1820                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1821                 SCTP_INP_INFO_WUNLOCK();
1822                 return error;
1823         }
1824 #endif                          /* IPSEC */
1825         SCTP_INCR_EP_COUNT();
1826         inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
1827         SCTP_INP_INFO_WUNLOCK();
1828
1829         so->so_pcb = (caddr_t)inp;
1830
1831         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
1832             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
1833                 /* UDP style socket */
1834                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
1835                     SCTP_PCB_FLAGS_UNBOUND);
1836                 /* Be sure it is NON-BLOCKING IO for UDP */
1837                 /* SCTP_SET_SO_NBIO(so); */
1838         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
1839                 /* TCP style socket */
1840                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
1841                     SCTP_PCB_FLAGS_UNBOUND);
1842                 /* Be sure we have blocking IO by default */
1843                 SCTP_CLEAR_SO_NBIO(so);
1844         } else {
1845                 /*
1846                  * unsupported socket type (RAW, etc)- in case we missed it
1847                  * in protosw
1848                  */
1849                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1850                 return (EOPNOTSUPP);
1851         }
1852         sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
1853
1854         inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize,
1855             &inp->sctp_hashmark);
1856         if (inp->sctp_tcbhash == NULL) {
1857                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
1858                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
1859                 return (ENOBUFS);
1860         }
1861         inp->def_vrf_id = vrf_id;
1862
1863         SCTP_INP_INFO_WLOCK();
1864         SCTP_INP_LOCK_INIT(inp);
1865         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
1866         SCTP_INP_READ_INIT(inp);
1867         SCTP_ASOC_CREATE_LOCK_INIT(inp);
1868         /* lock the new ep */
1869         SCTP_INP_WLOCK(inp);
1870
1871         /* add it to the info area */
1872         LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
1873         SCTP_INP_INFO_WUNLOCK();
1874
1875         TAILQ_INIT(&inp->read_queue);
1876         LIST_INIT(&inp->sctp_addr_list);
1877
1878         LIST_INIT(&inp->sctp_asoc_list);
1879
1880 #ifdef SCTP_TRACK_FREED_ASOCS
1881         /* TEMP CODE */
1882         LIST_INIT(&inp->sctp_asoc_free_list);
1883 #endif
1884         /* Init the timer structure for signature change */
1885         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
1886         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
1887
1888         /* now init the actual endpoint default data */
1889         m = &inp->sctp_ep;
1890
1891         /* setup the base timeout information */
1892         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
1893         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
1894         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
1895         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
1896         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
1897         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
1898         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
1899         /* all max/min max are in ms */
1900         m->sctp_maxrto = sctp_rto_max_default;
1901         m->sctp_minrto = sctp_rto_min_default;
1902         m->initial_rto = sctp_rto_initial_default;
1903         m->initial_init_rto_max = sctp_init_rto_max_default;
1904         m->sctp_sack_freq = sctp_sack_freq_default;
1905
1906         m->max_open_streams_intome = MAX_SCTP_STREAMS;
1907
1908         m->max_init_times = sctp_init_rtx_max_default;
1909         m->max_send_times = sctp_assoc_rtx_max_default;
1910         m->def_net_failure = sctp_path_rtx_max_default;
1911         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
1912         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
1913         m->max_burst = sctp_max_burst_default;
1914         /* number of streams to pre-open on a association */
1915         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1916
1917         /* Add adaptation cookie */
1918         m->adaptation_layer_indicator = 0x504C5253;
1919
1920         /* seed random number generator */
1921         m->random_counter = 1;
1922         m->store_at = SCTP_SIGNATURE_SIZE;
1923         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
1924         sctp_fill_random_store(m);
1925
1926         /* Minimum cookie size */
1927         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1928             sizeof(struct sctp_state_cookie);
1929         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1930
1931         /* Setup the initial secret */
1932         (void)SCTP_GETTIME_TIMEVAL(&time);
1933         m->time_of_secret_change = time.tv_sec;
1934
1935         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1936                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1937         }
1938         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1939
1940         /* How long is a cookie good for ? */
1941         m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default);
1942         /*
1943          * Initialize authentication parameters
1944          */
1945         m->local_hmacs = sctp_default_supported_hmaclist();
1946         m->local_auth_chunks = sctp_alloc_chunklist();
1947         sctp_auth_set_default_chunks(m->local_auth_chunks);
1948         LIST_INIT(&m->shared_keys);
1949         /* add default NULL key as key id 0 */
1950         null_key = sctp_alloc_sharedkey();
1951         sctp_insert_sharedkey(&m->shared_keys, null_key);
1952         SCTP_INP_WUNLOCK(inp);
1953 #ifdef SCTP_LOG_CLOSING
1954         sctp_log_closing(inp, NULL, 12);
1955 #endif
1956         return (error);
1957 }
1958
1959
1960 void
1961 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1962     struct sctp_tcb *stcb)
1963 {
1964         struct sctp_nets *net;
1965         uint16_t lport, rport;
1966         struct sctppcbhead *head;
1967         struct sctp_laddr *laddr, *oladdr;
1968
1969         SCTP_TCB_UNLOCK(stcb);
1970         SCTP_INP_INFO_WLOCK();
1971         SCTP_INP_WLOCK(old_inp);
1972         SCTP_INP_WLOCK(new_inp);
1973         SCTP_TCB_LOCK(stcb);
1974
1975         new_inp->sctp_ep.time_of_secret_change =
1976             old_inp->sctp_ep.time_of_secret_change;
1977         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1978             sizeof(old_inp->sctp_ep.secret_key));
1979         new_inp->sctp_ep.current_secret_number =
1980             old_inp->sctp_ep.current_secret_number;
1981         new_inp->sctp_ep.last_secret_number =
1982             old_inp->sctp_ep.last_secret_number;
1983         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1984
1985         /* make it so new data pours into the new socket */
1986         stcb->sctp_socket = new_inp->sctp_socket;
1987         stcb->sctp_ep = new_inp;
1988
1989         /* Copy the port across */
1990         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1991         rport = stcb->rport;
1992         /* Pull the tcb from the old association */
1993         LIST_REMOVE(stcb, sctp_tcbhash);
1994         LIST_REMOVE(stcb, sctp_tcblist);
1995
1996         /* Now insert the new_inp into the TCP connected hash */
1997         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
1998             sctppcbinfo.hashtcpmark)];
1999
2000         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2001         /* Its safe to access */
2002         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2003
2004         /* Now move the tcb into the endpoint list */
2005         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2006         /*
2007          * Question, do we even need to worry about the ep-hash since we
2008          * only have one connection? Probably not :> so lets get rid of it
2009          * and not suck up any kernel memory in that.
2010          */
2011
2012         /* Ok. Let's restart timer. */
2013         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2014                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2015                     stcb, net);
2016         }
2017
2018         SCTP_INP_INFO_WUNLOCK();
2019         if (new_inp->sctp_tcbhash != NULL) {
2020                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2021                 new_inp->sctp_tcbhash = NULL;
2022         }
2023         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2024                 /* Subset bound, so copy in the laddr list from the old_inp */
2025                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2026                         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
2027                         if (laddr == NULL) {
2028                                 /*
2029                                  * Gak, what can we do? This assoc is really
2030                                  * HOSED. We probably should send an abort
2031                                  * here.
2032                                  */
2033                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2034                                 continue;
2035                         }
2036                         SCTP_INCR_LADDR_COUNT();
2037                         bzero(laddr, sizeof(*laddr));
2038                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2039                         laddr->ifa = oladdr->ifa;
2040                         atomic_add_int(&laddr->ifa->refcount, 1);
2041                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2042                             sctp_nxt_addr);
2043                         new_inp->laddr_count++;
2044                 }
2045         }
2046         /*
2047          * Now any running timers need to be adjusted since we really don't
2048          * care if they are running or not just blast in the new_inp into
2049          * all of them.
2050          */
2051
2052         stcb->asoc.hb_timer.ep = (void *)new_inp;
2053         stcb->asoc.dack_timer.ep = (void *)new_inp;
2054         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2055         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2056         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2057         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2058         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2059         /* now what about the nets? */
2060         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2061                 net->pmtu_timer.ep = (void *)new_inp;
2062                 net->rxt_timer.ep = (void *)new_inp;
2063                 net->fr_timer.ep = (void *)new_inp;
2064         }
2065         SCTP_INP_WUNLOCK(new_inp);
2066         SCTP_INP_WUNLOCK(old_inp);
2067 }
2068
2069 static int
2070 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2071 {
2072         struct sctppcbhead *head;
2073         struct sctp_inpcb *t_inp;
2074         int fnd;
2075
2076         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2077             sctppcbinfo.hashmark)];
2078         LIST_FOREACH(t_inp, head, sctp_hash) {
2079                 if (t_inp->sctp_lport != lport) {
2080                         continue;
2081                 }
2082                 /* is it in the VRF in question */
2083                 fnd = 0;
2084                 if (t_inp->def_vrf_id == vrf_id)
2085                         fnd = 1;
2086                 if (!fnd)
2087                         continue;
2088
2089                 /* This one is in use. */
2090                 /* check the v6/v4 binding issue */
2091                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2092                     SCTP_IPV6_V6ONLY(t_inp)) {
2093                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2094                                 /* collision in V6 space */
2095                                 return (1);
2096                         } else {
2097                                 /* inp is BOUND_V4 no conflict */
2098                                 continue;
2099                         }
2100                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2101                         /* t_inp is bound v4 and v6, conflict always */
2102                         return (1);
2103                 } else {
2104                         /* t_inp is bound only V4 */
2105                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2106                             SCTP_IPV6_V6ONLY(inp)) {
2107                                 /* no conflict */
2108                                 continue;
2109                         }
2110                         /* else fall through to conflict */
2111                 }
2112                 return (1);
2113         }
2114         return (0);
2115 }
2116
2117
2118
2119 int
2120 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2121     struct sctp_ifa *sctp_ifap, struct thread *p)
2122 {
2123         /* bind a ep to a socket address */
2124         struct sctppcbhead *head;
2125         struct sctp_inpcb *inp, *inp_tmp;
2126         struct inpcb *ip_inp;
2127         int bindall;
2128         uint16_t lport;
2129         int error;
2130         uint32_t vrf_id;
2131
2132         lport = 0;
2133         error = 0;
2134         bindall = 1;
2135         inp = (struct sctp_inpcb *)so->so_pcb;
2136         ip_inp = (struct inpcb *)so->so_pcb;
2137 #ifdef SCTP_DEBUG
2138         if (addr) {
2139                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2140                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2141                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2142                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2143         }
2144 #endif
2145         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2146                 /* already did a bind, subsequent binds NOT allowed ! */
2147                 return (EINVAL);
2148         }
2149         if (addr != NULL) {
2150                 if (addr->sa_family == AF_INET) {
2151                         struct sockaddr_in *sin;
2152
2153                         /* IPV6_V6ONLY socket? */
2154                         if (SCTP_IPV6_V6ONLY(ip_inp)) {
2155                                 return (EINVAL);
2156                         }
2157                         if (addr->sa_len != sizeof(*sin))
2158                                 return (EINVAL);
2159
2160                         sin = (struct sockaddr_in *)addr;
2161                         lport = sin->sin_port;
2162
2163                         if (sin->sin_addr.s_addr != INADDR_ANY) {
2164                                 bindall = 0;
2165                         }
2166                 } else if (addr->sa_family == AF_INET6) {
2167                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2168                         struct sockaddr_in6 *sin6;
2169
2170                         sin6 = (struct sockaddr_in6 *)addr;
2171
2172                         if (addr->sa_len != sizeof(*sin6))
2173                                 return (EINVAL);
2174
2175                         lport = sin6->sin6_port;
2176                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2177                                 bindall = 0;
2178                                 /* KAME hack: embed scopeid */
2179                                 if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
2180                                         return (EINVAL);
2181                         }
2182                         /* this must be cleared for ifa_ifwithaddr() */
2183                         sin6->sin6_scope_id = 0;
2184                 } else {
2185                         return (EAFNOSUPPORT);
2186                 }
2187         }
2188         /* Setup a vrf_id to be the default for the non-bind-all case. */
2189         vrf_id = inp->def_vrf_id;
2190
2191         SCTP_INP_INFO_WLOCK();
2192         SCTP_INP_WLOCK(inp);
2193         /* increase our count due to the unlock we do */
2194         SCTP_INP_INCR_REF(inp);
2195         if (lport) {
2196                 /*
2197                  * Did the caller specify a port? if so we must see if a ep
2198                  * already has this one bound.
2199                  */
2200                 /* got to be root to get at low ports */
2201                 if (ntohs(lport) < IPPORT_RESERVED) {
2202                         if (p && (error =
2203                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2204                             )) {
2205                                 SCTP_INP_DECR_REF(inp);
2206                                 SCTP_INP_WUNLOCK(inp);
2207                                 SCTP_INP_INFO_WUNLOCK();
2208                                 return (error);
2209                         }
2210                 }
2211                 if (p == NULL) {
2212                         SCTP_INP_DECR_REF(inp);
2213                         SCTP_INP_WUNLOCK(inp);
2214                         SCTP_INP_INFO_WUNLOCK();
2215                         return (error);
2216                 }
2217                 SCTP_INP_WUNLOCK(inp);
2218                 if (bindall) {
2219                         vrf_id = inp->def_vrf_id;
2220                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2221                         if (inp_tmp != NULL) {
2222                                 /*
2223                                  * lock guy returned and lower count note
2224                                  * that we are not bound so inp_tmp should
2225                                  * NEVER be inp. And it is this inp
2226                                  * (inp_tmp) that gets the reference bump,
2227                                  * so we must lower it.
2228                                  */
2229                                 SCTP_INP_DECR_REF(inp_tmp);
2230                                 SCTP_INP_DECR_REF(inp);
2231                                 /* unlock info */
2232                                 SCTP_INP_INFO_WUNLOCK();
2233                                 return (EADDRINUSE);
2234                         }
2235                 } else {
2236                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2237                         if (inp_tmp != NULL) {
2238                                 /*
2239                                  * lock guy returned and lower count note
2240                                  * that we are not bound so inp_tmp should
2241                                  * NEVER be inp. And it is this inp
2242                                  * (inp_tmp) that gets the reference bump,
2243                                  * so we must lower it.
2244                                  */
2245                                 SCTP_INP_DECR_REF(inp_tmp);
2246                                 SCTP_INP_DECR_REF(inp);
2247                                 /* unlock info */
2248                                 SCTP_INP_INFO_WUNLOCK();
2249                                 return (EADDRINUSE);
2250                         }
2251                 }
2252                 SCTP_INP_WLOCK(inp);
2253                 if (bindall) {
2254                         /* verify that no lport is not used by a singleton */
2255                         if (sctp_isport_inuse(inp, lport, vrf_id)) {
2256                                 /* Sorry someone already has this one bound */
2257                                 SCTP_INP_DECR_REF(inp);
2258                                 SCTP_INP_WUNLOCK(inp);
2259                                 SCTP_INP_INFO_WUNLOCK();
2260                                 return (EADDRINUSE);
2261                         }
2262                 }
2263         } else {
2264                 uint16_t first, last, candidate;
2265                 uint16_t count;
2266                 int done;
2267
2268                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2269                         first = ipport_hifirstauto;
2270                         last = ipport_hilastauto;
2271                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2272                         if (p && (error =
2273                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2274                             )) {
2275                                 SCTP_INP_DECR_REF(inp);
2276                                 SCTP_INP_WUNLOCK(inp);
2277                                 SCTP_INP_INFO_WUNLOCK();
2278                                 return (error);
2279                         }
2280                         first = ipport_lowfirstauto;
2281                         last = ipport_lowlastauto;
2282                 } else {
2283                         first = ipport_firstauto;
2284                         last = ipport_lastauto;
2285                 }
2286                 if (first > last) {
2287                         uint16_t temp;
2288
2289                         temp = first;
2290                         first = last;
2291                         last = temp;
2292                 }
2293                 count = last - first + 1;       /* number of candidates */
2294                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2295
2296                 done = 0;
2297                 while (!done) {
2298                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2299                                 done = 1;
2300                         }
2301                         if (!done) {
2302                                 if (--count == 0) {
2303                                         SCTP_INP_DECR_REF(inp);
2304                                         SCTP_INP_WUNLOCK(inp);
2305                                         SCTP_INP_INFO_WUNLOCK();
2306                                         return (EADDRINUSE);
2307                                 }
2308                                 if (candidate == last)
2309                                         candidate = first;
2310                                 else
2311                                         candidate = candidate + 1;
2312                         }
2313                 }
2314                 lport = htons(candidate);
2315         }
2316         SCTP_INP_DECR_REF(inp);
2317         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2318             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2319                 /*
2320                  * this really should not happen. The guy did a non-blocking
2321                  * bind and then did a close at the same time.
2322                  */
2323                 SCTP_INP_WUNLOCK(inp);
2324                 SCTP_INP_INFO_WUNLOCK();
2325                 return (EINVAL);
2326         }
2327         /* ok we look clear to give out this port, so lets setup the binding */
2328         if (bindall) {
2329                 /* binding to all addresses, so just set in the proper flags */
2330                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2331                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2332                 /* set the automatic addr changes from kernel flag */
2333                 if (sctp_auto_asconf == 0) {
2334                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2335                 } else {
2336                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2337                 }
2338         } else {
2339                 /*
2340                  * bind specific, make sure flags is off and add a new
2341                  * address structure to the sctp_addr_list inside the ep
2342                  * structure.
2343                  *
2344                  * We will need to allocate one and insert it at the head. The
2345                  * socketopt call can just insert new addresses in there as
2346                  * well. It will also have to do the embed scope kame hack
2347                  * too (before adding).
2348                  */
2349                 struct sctp_ifa *ifa;
2350                 struct sockaddr_storage store_sa;
2351
2352                 memset(&store_sa, 0, sizeof(store_sa));
2353                 if (addr->sa_family == AF_INET) {
2354                         struct sockaddr_in *sin;
2355
2356                         sin = (struct sockaddr_in *)&store_sa;
2357                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2358                         sin->sin_port = 0;
2359                 } else if (addr->sa_family == AF_INET6) {
2360                         struct sockaddr_in6 *sin6;
2361
2362                         sin6 = (struct sockaddr_in6 *)&store_sa;
2363                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2364                         sin6->sin6_port = 0;
2365                 }
2366                 /*
2367                  * first find the interface with the bound address need to
2368                  * zero out the port to find the address! yuck! can't do
2369                  * this earlier since need port for sctp_pcb_findep()
2370                  */
2371                 if (sctp_ifap)
2372                         ifa = sctp_ifap;
2373                 else
2374                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2375                             vrf_id, 0);
2376                 if (ifa == NULL) {
2377                         /* Can't find an interface with that address */
2378                         SCTP_INP_WUNLOCK(inp);
2379                         SCTP_INP_INFO_WUNLOCK();
2380                         return (EADDRNOTAVAIL);
2381                 }
2382                 if (addr->sa_family == AF_INET6) {
2383                         /* GAK, more FIXME IFA lock? */
2384                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2385                                 /* Can't bind a non-existent addr. */
2386                                 SCTP_INP_WUNLOCK(inp);
2387                                 SCTP_INP_INFO_WUNLOCK();
2388                                 return (EINVAL);
2389                         }
2390                 }
2391                 /* we're not bound all */
2392                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2393                 /* allow bindx() to send ASCONF's for binding changes */
2394                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2395                 /* clear automatic addr changes from kernel flag */
2396                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2397
2398                 /* add this address to the endpoint list */
2399                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2400                 if (error != 0) {
2401                         SCTP_INP_WUNLOCK(inp);
2402                         SCTP_INP_INFO_WUNLOCK();
2403                         return (error);
2404                 }
2405                 inp->laddr_count++;
2406         }
2407         /* find the bucket */
2408         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2409             sctppcbinfo.hashmark)];
2410         /* put it in the bucket */
2411         LIST_INSERT_HEAD(head, inp, sctp_hash);
2412         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2413             head, ntohs(lport));
2414         /* set in the port */
2415         inp->sctp_lport = lport;
2416
2417         /* turn off just the unbound flag */
2418         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2419         SCTP_INP_WUNLOCK(inp);
2420         SCTP_INP_INFO_WUNLOCK();
2421         return (0);
2422 }
2423
2424
2425 static void
2426 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2427 {
2428         struct sctp_iterator *it;
2429
2430         /*
2431          * We enter with the only the ITERATOR_LOCK in place and a write
2432          * lock on the inp_info stuff.
2433          */
2434
2435         /*
2436          * Go through all iterators, we must do this since it is possible
2437          * that some iterator does NOT have the lock, but is waiting for it.
2438          * And the one that had the lock has either moved in the last
2439          * iteration or we just cleared it above. We need to find all of
2440          * those guys. The list of iterators should never be very big
2441          * though.
2442          */
2443         TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2444                 if (it == inp->inp_starting_point_for_iterator)
2445                         /* skip this guy, he's special */
2446                         continue;
2447                 if (it->inp == inp) {
2448                         /*
2449                          * This is tricky and we DON'T lock the iterator.
2450                          * Reason is he's running but waiting for me since
2451                          * inp->inp_starting_point_for_iterator has the lock
2452                          * on me (the guy above we skipped). This tells us
2453                          * its is not running but waiting for
2454                          * inp->inp_starting_point_for_iterator to be
2455                          * released by the guy that does have our INP in a
2456                          * lock.
2457                          */
2458                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2459                                 it->inp = NULL;
2460                                 it->stcb = NULL;
2461                         } else {
2462                                 /* set him up to do the next guy not me */
2463                                 it->inp = inp_next;
2464                                 it->stcb = NULL;
2465                         }
2466                 }
2467         }
2468         it = inp->inp_starting_point_for_iterator;
2469         if (it) {
2470                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2471                         it->inp = NULL;
2472                 } else {
2473                         it->inp = inp_next;
2474                 }
2475                 it->stcb = NULL;
2476         }
2477 }
2478
2479 /* release sctp_inpcb unbind the port */
2480 void
2481 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2482 {
2483         /*
2484          * Here we free a endpoint. We must find it (if it is in the Hash
2485          * table) and remove it from there. Then we must also find it in the
2486          * overall list and remove it from there. After all removals are
2487          * complete then any timer has to be stopped. Then start the actual
2488          * freeing. a) Any local lists. b) Any associations. c) The hash of
2489          * all associations. d) finally the ep itself.
2490          */
2491         struct sctp_pcb *m;
2492         struct sctp_inpcb *inp_save;
2493         struct sctp_tcb *asoc, *nasoc;
2494         struct sctp_laddr *laddr, *nladdr;
2495         struct inpcb *ip_pcb;
2496         struct socket *so;
2497
2498         struct sctp_queued_to_read *sq;
2499
2500
2501         int cnt;
2502         sctp_sharedkey_t *shared_key;
2503
2504
2505 #ifdef SCTP_LOG_CLOSING
2506         sctp_log_closing(inp, NULL, 0);
2507 #endif
2508
2509         SCTP_ITERATOR_LOCK();
2510         so = inp->sctp_socket;
2511         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2512                 /* been here before.. eeks.. get out of here */
2513                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2514                 SCTP_ITERATOR_UNLOCK();
2515 #ifdef SCTP_LOG_CLOSING
2516                 sctp_log_closing(inp, NULL, 1);
2517 #endif
2518                 return;
2519         }
2520         SCTP_ASOC_CREATE_LOCK(inp);
2521         SCTP_INP_INFO_WLOCK();
2522
2523         SCTP_INP_WLOCK(inp);
2524         /* First time through we have the socket lock, after that no more. */
2525         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2526                 /*
2527                  * Once we are in we can remove the flag from = 1 is only
2528                  * passed from the actual closing routines that are called
2529                  * via the sockets layer.
2530                  */
2531                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2532         }
2533         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2534             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2535
2536         if (inp->control) {
2537                 sctp_m_freem(inp->control);
2538                 inp->control = NULL;
2539         }
2540         if (inp->pkt) {
2541                 sctp_m_freem(inp->pkt);
2542                 inp->pkt = NULL;
2543         }
2544         m = &inp->sctp_ep;
2545         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
2546                                          * here but I will be nice :> (i.e.
2547                                          * ip_pcb = ep;) */
2548         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
2549                 int cnt_in_sd;
2550
2551                 cnt_in_sd = 0;
2552                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2553                     asoc = nasoc) {
2554                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2555                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2556                                 /* Skip guys being freed */
2557                                 asoc->sctp_socket = NULL;
2558                                 cnt_in_sd++;
2559                                 continue;
2560                         }
2561                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2562                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2563                                 /*
2564                                  * If we have data in queue, we don't want
2565                                  * to just free since the app may have done,
2566                                  * send()/close or connect/send/close. And
2567                                  * it wants the data to get across first.
2568                                  */
2569                                 if (asoc->asoc.total_output_queue_size == 0) {
2570                                         /*
2571                                          * Just abandon things in the front
2572                                          * states
2573                                          */
2574                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2);
2575                                         continue;
2576                                 }
2577                         }
2578                         SCTP_TCB_LOCK(asoc);
2579                         /* Disconnect the socket please */
2580                         asoc->sctp_socket = NULL;
2581                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2582                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
2583                             (asoc->asoc.control_pdapi) ||
2584                             (asoc->asoc.size_on_all_streams > 0) ||
2585                             (so && (so->so_rcv.sb_cc > 0))
2586                             ) {
2587                                 /* Left with Data unread */
2588                                 struct mbuf *op_err;
2589
2590                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2591                                     0, M_DONTWAIT, 1, MT_DATA);
2592                                 if (op_err) {
2593                                         /* Fill in the user initiated abort */
2594                                         struct sctp_paramhdr *ph;
2595                                         uint32_t *ippp;
2596
2597                                         SCTP_BUF_LEN(op_err) =
2598                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2599                                         ph = mtod(op_err,
2600                                             struct sctp_paramhdr *);
2601                                         ph->param_type = htons(
2602                                             SCTP_CAUSE_USER_INITIATED_ABT);
2603                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
2604                                         ippp = (uint32_t *) (ph + 1);
2605                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2606                                 }
2607                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2608                                 sctp_send_abort_tcb(asoc, op_err);
2609                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2610                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2611                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2612                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2613                                 }
2614                                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4);
2615                                 continue;
2616                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2617                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2618                                     (asoc->asoc.stream_queue_cnt == 0)
2619                             ) {
2620                                 if (asoc->asoc.locked_on_sending) {
2621                                         goto abort_anyway;
2622                                 }
2623                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2624                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2625                                         /*
2626                                          * there is nothing queued to send,
2627                                          * so I send shutdown
2628                                          */
2629                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2630                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2631                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2632                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2633                                         }
2634                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2635                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2636                                             asoc->asoc.primary_destination);
2637                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2638                                             asoc->asoc.primary_destination);
2639                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR);
2640                                 }
2641                         } else {
2642                                 /* mark into shutdown pending */
2643                                 struct sctp_stream_queue_pending *sp;
2644
2645                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2646                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2647                                     asoc->asoc.primary_destination);
2648                                 if (asoc->asoc.locked_on_sending) {
2649                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2650                                             sctp_streamhead);
2651                                         if (sp == NULL) {
2652                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
2653                                                     asoc->asoc.locked_on_sending,
2654                                                     asoc->asoc.locked_on_sending->stream_no);
2655                                         } else {
2656                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2657                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2658                                         }
2659                                 }
2660                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2661                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2662                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2663                                         struct mbuf *op_err;
2664
2665                         abort_anyway:
2666                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2667                                             0, M_DONTWAIT, 1, MT_DATA);
2668                                         if (op_err) {
2669                                                 /*
2670                                                  * Fill in the user
2671                                                  * initiated abort
2672                                                  */
2673                                                 struct sctp_paramhdr *ph;
2674                                                 uint32_t *ippp;
2675
2676                                                 SCTP_BUF_LEN(op_err) =
2677                                                     (sizeof(struct sctp_paramhdr) +
2678                                                     sizeof(uint32_t));
2679                                                 ph = mtod(op_err,
2680                                                     struct sctp_paramhdr *);
2681                                                 ph->param_type = htons(
2682                                                     SCTP_CAUSE_USER_INITIATED_ABT);
2683                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2684                                                 ippp = (uint32_t *) (ph + 1);
2685                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
2686                                         }
2687                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
2688                                         sctp_send_abort_tcb(asoc, op_err);
2689                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2690                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2691                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2692                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2693                                         }
2694                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6);
2695                                         continue;
2696                                 }
2697                         }
2698                         cnt_in_sd++;
2699                         SCTP_TCB_UNLOCK(asoc);
2700                 }
2701                 /* now is there some left in our SHUTDOWN state? */
2702                 if (cnt_in_sd) {
2703                         SCTP_INP_WUNLOCK(inp);
2704                         SCTP_ASOC_CREATE_UNLOCK(inp);
2705                         SCTP_INP_INFO_WUNLOCK();
2706                         SCTP_ITERATOR_UNLOCK();
2707 #ifdef SCTP_LOG_CLOSING
2708                         sctp_log_closing(inp, NULL, 2);
2709 #endif
2710                         return;
2711                 }
2712         }
2713         inp->sctp_socket = NULL;
2714         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2715             SCTP_PCB_FLAGS_UNBOUND) {
2716                 /*
2717                  * ok, this guy has been bound. It's port is somewhere in
2718                  * the sctppcbinfo hash table. Remove it!
2719                  */
2720                 LIST_REMOVE(inp, sctp_hash);
2721                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2722         }
2723         /*
2724          * If there is a timer running to kill us, forget it, since it may
2725          * have a contest on the INP lock.. which would cause us to die ...
2726          */
2727         cnt = 0;
2728         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2729             asoc = nasoc) {
2730                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2731                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2732                         cnt++;
2733                         continue;
2734                 }
2735                 /* Free associations that are NOT killing us */
2736                 SCTP_TCB_LOCK(asoc);
2737                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
2738                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
2739                         struct mbuf *op_err;
2740                         uint32_t *ippp;
2741
2742                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2743                             0, M_DONTWAIT, 1, MT_DATA);
2744                         if (op_err) {
2745                                 /* Fill in the user initiated abort */
2746                                 struct sctp_paramhdr *ph;
2747
2748                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
2749                                     sizeof(uint32_t));
2750                                 ph = mtod(op_err, struct sctp_paramhdr *);
2751                                 ph->param_type = htons(
2752                                     SCTP_CAUSE_USER_INITIATED_ABT);
2753                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2754                                 ippp = (uint32_t *) (ph + 1);
2755                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
2756
2757                         }
2758                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
2759                         sctp_send_abort_tcb(asoc, op_err);
2760                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2761                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2762                         cnt++;
2763                         SCTP_TCB_UNLOCK(asoc);
2764                         continue;
2765                 }
2766                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2767                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2768                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2769                 }
2770                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8);
2771         }
2772         if (cnt) {
2773                 /* Ok we have someone out there that will kill us */
2774                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2775                 SCTP_INP_WUNLOCK(inp);
2776                 SCTP_ASOC_CREATE_UNLOCK(inp);
2777                 SCTP_INP_INFO_WUNLOCK();
2778                 SCTP_ITERATOR_UNLOCK();
2779 #ifdef SCTP_LOG_CLOSING
2780                 sctp_log_closing(inp, NULL, 3);
2781 #endif
2782                 return;
2783         }
2784         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
2785                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2786                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2787                 SCTP_INP_WUNLOCK(inp);
2788                 SCTP_ASOC_CREATE_UNLOCK(inp);
2789                 SCTP_INP_INFO_WUNLOCK();
2790                 SCTP_ITERATOR_UNLOCK();
2791 #ifdef SCTP_LOG_CLOSING
2792                 sctp_log_closing(inp, NULL, 4);
2793 #endif
2794                 return;
2795         }
2796         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2797         inp->sctp_ep.signature_change.type = 0;
2798         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2799
2800 #ifdef SCTP_LOG_CLOSING
2801         sctp_log_closing(inp, NULL, 5);
2802 #endif
2803
2804         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2805         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
2806         /* Clear the read queue */
2807         /* sa_ignore FREED_MEMORY */
2808         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
2809                 /* Its only abandoned if it had data left */
2810                 if (sq->length)
2811                         SCTP_STAT_INCR(sctps_left_abandon);
2812
2813                 TAILQ_REMOVE(&inp->read_queue, sq, next);
2814                 sctp_free_remote_addr(sq->whoFrom);
2815                 if (so)
2816                         so->so_rcv.sb_cc -= sq->length;
2817                 if (sq->data) {
2818                         sctp_m_freem(sq->data);
2819                         sq->data = NULL;
2820                 }
2821                 /*
2822                  * no need to free the net count, since at this point all
2823                  * assoc's are gone.
2824                  */
2825                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2826                 SCTP_DECR_READQ_COUNT();
2827         }
2828         /* Now the sctp_pcb things */
2829         /*
2830          * free each asoc if it is not already closed/free. we can't use the
2831          * macro here since le_next will get freed as part of the
2832          * sctp_free_assoc() call.
2833          */
2834         cnt = 0;
2835         if (so) {
2836 #ifdef IPSEC
2837                 ipsec4_delete_pcbpolicy(ip_pcb);
2838 #endif                          /* IPSEC */
2839
2840                 /* Unlocks not needed since the socket is gone now */
2841         }
2842         if (ip_pcb->inp_options) {
2843                 (void)sctp_m_free(ip_pcb->inp_options);
2844                 ip_pcb->inp_options = 0;
2845         }
2846         if (ip_pcb->inp_moptions) {
2847                 inp_freemoptions(ip_pcb->inp_moptions);
2848                 ip_pcb->inp_moptions = 0;
2849         }
2850 #ifdef INET6
2851         if (ip_pcb->inp_vflag & INP_IPV6) {
2852                 struct in6pcb *in6p;
2853
2854                 in6p = (struct in6pcb *)inp;
2855                 ip6_freepcbopts(in6p->in6p_outputopts);
2856         }
2857 #endif                          /* INET6 */
2858         ip_pcb->inp_vflag = 0;
2859         /* free up authentication fields */
2860         if (inp->sctp_ep.local_auth_chunks != NULL)
2861                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2862         if (inp->sctp_ep.local_hmacs != NULL)
2863                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2864
2865         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2866         while (shared_key) {
2867                 LIST_REMOVE(shared_key, next);
2868                 sctp_free_sharedkey(shared_key);
2869                 /* sa_ignore FREED_MEMORY */
2870                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2871         }
2872
2873         inp_save = LIST_NEXT(inp, sctp_list);
2874         LIST_REMOVE(inp, sctp_list);
2875
2876         /* fix any iterators only after out of the list */
2877         sctp_iterator_inp_being_freed(inp, inp_save);
2878         /*
2879          * if we have an address list the following will free the list of
2880          * ifaddr's that are set into this ep. Again macro limitations here,
2881          * since the LIST_FOREACH could be a bad idea.
2882          */
2883         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2884             laddr = nladdr) {
2885                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2886                 sctp_remove_laddr(laddr);
2887         }
2888
2889 #ifdef SCTP_TRACK_FREED_ASOCS
2890         /* TEMP CODE */
2891         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
2892             asoc = nasoc) {
2893                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2894                 LIST_REMOVE(asoc, sctp_tcblist);
2895                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
2896                 SCTP_DECR_ASOC_COUNT();
2897         }
2898         /* *** END TEMP CODE *** */
2899 #endif
2900         /* Now lets see about freeing the EP hash table. */
2901         if (inp->sctp_tcbhash != NULL) {
2902                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2903                 inp->sctp_tcbhash = NULL;
2904         }
2905         /* Now we must put the ep memory back into the zone pool */
2906         INP_LOCK_DESTROY(&inp->ip_inp.inp);
2907         SCTP_INP_LOCK_DESTROY(inp);
2908         SCTP_INP_READ_DESTROY(inp);
2909         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2910         SCTP_INP_INFO_WUNLOCK();
2911
2912         SCTP_ITERATOR_UNLOCK();
2913
2914         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2915         SCTP_DECR_EP_COUNT();
2916
2917 }
2918
2919
2920 struct sctp_nets *
2921 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2922 {
2923         struct sctp_nets *net;
2924
2925         /* locate the address */
2926         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2927                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2928                         return (net);
2929         }
2930         return (NULL);
2931 }
2932
2933
2934 int
2935 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
2936 {
2937         struct sctp_ifa *sctp_ifa;
2938
2939         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0);
2940         if (sctp_ifa) {
2941                 return (1);
2942         } else {
2943                 return (0);
2944         }
2945 }
2946
2947 void
2948 sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net)
2949 {
2950         net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND));
2951         /* we always get at LEAST 2 MTU's */
2952         if (net->cwnd < (2 * net->mtu)) {
2953                 net->cwnd = 2 * net->mtu;
2954         }
2955         net->ssthresh = stcb->asoc.peers_rwnd;
2956 }
2957
2958
2959
2960 /*
2961  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2962  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2963  * stats of stuff.
2964  */
2965 int
2966 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2967     int set_scope, int from)
2968 {
2969         /*
2970          * The following is redundant to the same lines in the
2971          * sctp_aloc_assoc() but is needed since other's call the add
2972          * address function
2973          */
2974         struct sctp_nets *net, *netfirst;
2975         int addr_inscope;
2976
2977         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
2978             from);
2979         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
2980
2981         netfirst = sctp_findnet(stcb, newaddr);
2982         if (netfirst) {
2983                 /*
2984                  * Lie and return ok, we don't want to make the association
2985                  * go away for this behavior. It will happen in the TCP
2986                  * model in a connected socket. It does not reach the hash
2987                  * table until after the association is built so it can't be
2988                  * found. Mark as reachable, since the initial creation will
2989                  * have been cleared and the NOT_IN_ASSOC flag will have
2990                  * been added... and we don't want to end up removing it
2991                  * back out.
2992                  */
2993                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
2994                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
2995                             SCTP_ADDR_UNCONFIRMED);
2996                 } else {
2997                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
2998                 }
2999
3000                 return (0);
3001         }
3002         addr_inscope = 1;
3003         if (newaddr->sa_family == AF_INET) {
3004                 struct sockaddr_in *sin;
3005
3006                 sin = (struct sockaddr_in *)newaddr;
3007                 if (sin->sin_addr.s_addr == 0) {
3008                         /* Invalid address */
3009                         return (-1);
3010                 }
3011                 /* zero out the bzero area */
3012                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3013
3014                 /* assure len is set */
3015                 sin->sin_len = sizeof(struct sockaddr_in);
3016                 if (set_scope) {
3017 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3018                         stcb->ipv4_local_scope = 1;
3019 #else
3020                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3021                                 stcb->asoc.ipv4_local_scope = 1;
3022                         }
3023 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3024                 } else {
3025                         /* Validate the address is in scope */
3026                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3027                             (stcb->asoc.ipv4_local_scope == 0)) {
3028                                 addr_inscope = 0;
3029                         }
3030                 }
3031         } else if (newaddr->sa_family == AF_INET6) {
3032                 struct sockaddr_in6 *sin6;
3033
3034                 sin6 = (struct sockaddr_in6 *)newaddr;
3035                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3036                         /* Invalid address */
3037                         return (-1);
3038                 }
3039                 /* assure len is set */
3040                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3041                 if (set_scope) {
3042                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3043                                 stcb->asoc.loopback_scope = 1;
3044                                 stcb->asoc.local_scope = 0;
3045                                 stcb->asoc.ipv4_local_scope = 1;
3046                                 stcb->asoc.site_scope = 1;
3047                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3048                                 /*
3049                                  * If the new destination is a LINK_LOCAL we
3050                                  * must have common site scope. Don't set
3051                                  * the local scope since we may not share
3052                                  * all links, only loopback can do this.
3053                                  * Links on the local network would also be
3054                                  * on our private network for v4 too.
3055                                  */
3056                                 stcb->asoc.ipv4_local_scope = 1;
3057                                 stcb->asoc.site_scope = 1;
3058                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3059                                 /*
3060                                  * If the new destination is SITE_LOCAL then
3061                                  * we must have site scope in common.
3062                                  */
3063                                 stcb->asoc.site_scope = 1;
3064                         }
3065                 } else {
3066                         /* Validate the address is in scope */
3067                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3068                             (stcb->asoc.loopback_scope == 0)) {
3069                                 addr_inscope = 0;
3070                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3071                             (stcb->asoc.local_scope == 0)) {
3072                                 addr_inscope = 0;
3073                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3074                             (stcb->asoc.site_scope == 0)) {
3075                                 addr_inscope = 0;
3076                         }
3077                 }
3078         } else {
3079                 /* not supported family type */
3080                 return (-1);
3081         }
3082         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3083         if (net == NULL) {
3084                 return (-1);
3085         }
3086         SCTP_INCR_RADDR_COUNT();
3087         bzero(net, sizeof(*net));
3088         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3089         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3090         if (newaddr->sa_family == AF_INET) {
3091                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3092         } else if (newaddr->sa_family == AF_INET6) {
3093                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3094         }
3095         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3096         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3097                 stcb->asoc.loopback_scope = 1;
3098                 stcb->asoc.ipv4_local_scope = 1;
3099                 stcb->asoc.local_scope = 0;
3100                 stcb->asoc.site_scope = 1;
3101                 addr_inscope = 1;
3102         }
3103         net->failure_threshold = stcb->asoc.def_net_failure;
3104         if (addr_inscope == 0) {
3105                 net->dest_state = (SCTP_ADDR_REACHABLE |
3106                     SCTP_ADDR_OUT_OF_SCOPE);
3107         } else {
3108                 if (from == SCTP_ADDR_IS_CONFIRMED)
3109                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3110                         net->dest_state = SCTP_ADDR_REACHABLE;
3111                 else
3112                         net->dest_state = SCTP_ADDR_REACHABLE |
3113                             SCTP_ADDR_UNCONFIRMED;
3114         }
3115         /*
3116          * We set this to 0, the timer code knows that this means its an
3117          * initial value
3118          */
3119         net->RTO = 0;
3120         net->RTO_measured = 0;
3121         stcb->asoc.numnets++;
3122         *(&net->ref_count) = 1;
3123         net->tos_flowlabel = 0;
3124 #ifdef INET
3125         if (newaddr->sa_family == AF_INET)
3126                 net->tos_flowlabel = stcb->asoc.default_tos;
3127 #endif
3128 #ifdef INET6
3129         if (newaddr->sa_family == AF_INET6)
3130                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3131 #endif
3132         /* Init the timer structure */
3133         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3134         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3135         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3136
3137         /* Now generate a route for this guy */
3138         /* KAME hack: embed scopeid */
3139         if (newaddr->sa_family == AF_INET6) {
3140                 struct sockaddr_in6 *sin6;
3141
3142                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3143                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3144                 sin6->sin6_scope_id = 0;
3145         }
3146         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3147
3148         if (newaddr->sa_family == AF_INET6) {
3149                 struct sockaddr_in6 *sin6;
3150
3151                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3152                 (void)sa6_recoverscope(sin6);
3153         }
3154         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3155                 /* Get source address */
3156                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3157                     stcb,
3158                     (sctp_route_t *) & net->ro,
3159                     net,
3160                     0,
3161                     stcb->asoc.vrf_id);
3162                 /* Now get the interface MTU */
3163                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3164                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3165                 } else {
3166                         net->mtu = 0;
3167                 }
3168 #ifdef SCTP_PRINT_FOR_B_AND_M
3169                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3170 #endif
3171                 if (net->mtu == 0) {
3172                         /* Huh ?? */
3173                         net->mtu = SCTP_DEFAULT_MTU;
3174                 } else {
3175                         uint32_t rmtu;
3176
3177                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3178 #ifdef SCTP_PRINT_FOR_B_AND_M
3179                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3180 #endif
3181                         if (rmtu == 0) {
3182                                 /*
3183                                  * Start things off to match mtu of
3184                                  * interface please.
3185                                  */
3186                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3187                                     net->ro.ro_rt, net->mtu);
3188                         } else {
3189                                 /*
3190                                  * we take the route mtu over the interface,
3191                                  * since the route may be leading out the
3192                                  * loopback, or a different interface.
3193                                  */
3194                                 net->mtu = rmtu;
3195                         }
3196                 }
3197                 if (from == SCTP_ALLOC_ASOC) {
3198 #ifdef SCTP_PRINT_FOR_B_AND_M
3199                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3200 #endif
3201                         stcb->asoc.smallest_mtu = net->mtu;
3202                 }
3203         } else {
3204                 net->mtu = stcb->asoc.smallest_mtu;
3205         }
3206         if (stcb->asoc.smallest_mtu > net->mtu) {
3207 #ifdef SCTP_PRINT_FOR_B_AND_M
3208                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3209                     net->mtu, stcb->asoc.smallest_mtu);
3210 #endif
3211                 stcb->asoc.smallest_mtu = net->mtu;
3212         }
3213         /*
3214          * We take the max of the burst limit times a MTU or the
3215          * INITIAL_CWND. We then limit this to 4 MTU's of sending.
3216          */
3217         sctp_set_initial_cc_param(stcb, net);
3218
3219
3220         if (sctp_logging_level & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
3221                 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION);
3222         }
3223         /*
3224          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3225          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3226          */
3227         net->find_pseudo_cumack = 1;
3228         net->find_rtx_pseudo_cumack = 1;
3229         net->src_addr_selected = 0;
3230         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3231         if (net->ro.ro_rt == NULL) {
3232                 /* Since we have no route put it at the back */
3233                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3234         } else if (netfirst == NULL) {
3235                 /* We are the first one in the pool. */
3236                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3237         } else if (netfirst->ro.ro_rt == NULL) {
3238                 /*
3239                  * First one has NO route. Place this one ahead of the first
3240                  * one.
3241                  */
3242                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3243         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3244                 /*
3245                  * This one has a different interface than the one at the
3246                  * top of the list. Place it ahead.
3247                  */
3248                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3249         } else {
3250                 /*
3251                  * Ok we have the same interface as the first one. Move
3252                  * forward until we find either a) one with a NULL route...
3253                  * insert ahead of that b) one with a different ifp.. insert
3254                  * after that. c) end of the list.. insert at the tail.
3255                  */
3256                 struct sctp_nets *netlook;
3257
3258                 do {
3259                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3260                         if (netlook == NULL) {
3261                                 /* End of the list */
3262                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3263                                 break;
3264                         } else if (netlook->ro.ro_rt == NULL) {
3265                                 /* next one has NO route */
3266                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3267                                 break;
3268                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3269                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3270                                     net, sctp_next);
3271                                 break;
3272                         }
3273                         /* Shift forward */
3274                         netfirst = netlook;
3275                 } while (netlook != NULL);
3276         }
3277
3278         /* got to have a primary set */
3279         if (stcb->asoc.primary_destination == 0) {
3280                 stcb->asoc.primary_destination = net;
3281         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3282                     (net->ro.ro_rt) &&
3283             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3284                 /* No route to current primary adopt new primary */
3285                 stcb->asoc.primary_destination = net;
3286         }
3287         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3288             net);
3289         /* Validate primary is first */
3290         net = TAILQ_FIRST(&stcb->asoc.nets);
3291         if ((net != stcb->asoc.primary_destination) &&
3292             (stcb->asoc.primary_destination)) {
3293                 /*
3294                  * first one on the list is NOT the primary sctp_cmpaddr()
3295                  * is much more efficent if the primary is the first on the
3296                  * list, make it so.
3297                  */
3298                 TAILQ_REMOVE(&stcb->asoc.nets,
3299                     stcb->asoc.primary_destination, sctp_next);
3300                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3301                     stcb->asoc.primary_destination, sctp_next);
3302         }
3303         return (0);
3304 }
3305
3306
3307 /*
3308  * allocate an association and add it to the endpoint. The caller must be
3309  * careful to add all additional addresses once they are know right away or
3310  * else the assoc will be may experience a blackout scenario.
3311  */
3312 struct sctp_tcb *
3313 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3314     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id)
3315 {
3316         struct sctp_tcb *stcb;
3317         struct sctp_association *asoc;
3318         struct sctpasochead *head;
3319         uint16_t rport;
3320         int err;
3321
3322         /*
3323          * Assumption made here: Caller has done a
3324          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3325          * address does not exist already.
3326          */
3327         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3328                 /* Hit max assoc, sorry no more */
3329                 *error = ENOBUFS;
3330                 return (NULL);
3331         }
3332         if (firstaddr == NULL) {
3333                 *error = EINVAL;
3334                 return (NULL);
3335         }
3336         SCTP_INP_RLOCK(inp);
3337         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3338                 /*
3339                  * If its in the TCP pool, its NOT allowed to create an
3340                  * association. The parent listener needs to call
3341                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3342                  * off, or connected one does this.. its an error.
3343                  */
3344                 SCTP_INP_RUNLOCK(inp);
3345                 *error = EINVAL;
3346                 return (NULL);
3347         }
3348         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3349 #ifdef SCTP_DEBUG
3350         if (firstaddr) {
3351                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3352                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3353                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3354         } else {
3355                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3356         }
3357 #endif                          /* SCTP_DEBUG */
3358         if (firstaddr->sa_family == AF_INET) {
3359                 struct sockaddr_in *sin;
3360
3361                 sin = (struct sockaddr_in *)firstaddr;
3362                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3363                         /* Invalid address */
3364                         SCTP_INP_RUNLOCK(inp);
3365                         *error = EINVAL;
3366                         return (NULL);
3367                 }
3368                 rport = sin->sin_port;
3369         } else if (firstaddr->sa_family == AF_INET6) {
3370                 struct sockaddr_in6 *sin6;
3371
3372                 sin6 = (struct sockaddr_in6 *)firstaddr;
3373                 if ((sin6->sin6_port == 0) ||
3374                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3375                         /* Invalid address */
3376                         SCTP_INP_RUNLOCK(inp);
3377                         *error = EINVAL;
3378                         return (NULL);
3379                 }
3380                 rport = sin6->sin6_port;
3381         } else {
3382                 /* not supported family type */
3383                 SCTP_INP_RUNLOCK(inp);
3384                 *error = EINVAL;
3385                 return (NULL);
3386         }
3387         SCTP_INP_RUNLOCK(inp);
3388         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3389                 /*
3390                  * If you have not performed a bind, then we need to do the
3391                  * ephemerial bind for you.
3392                  */
3393                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3394                     (struct sockaddr *)NULL, (struct sctp_ifa *)NULL,
3395                     (struct thread *)NULL
3396                     ))) {
3397                         /* bind error, probably perm */
3398                         *error = err;
3399                         return (NULL);
3400                 }
3401         }
3402         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3403         if (stcb == NULL) {
3404                 /* out of memory? */
3405                 *error = ENOMEM;
3406                 return (NULL);
3407         }
3408         SCTP_INCR_ASOC_COUNT();
3409
3410         bzero(stcb, sizeof(*stcb));
3411         asoc = &stcb->asoc;
3412         SCTP_TCB_LOCK_INIT(stcb);
3413         SCTP_TCB_SEND_LOCK_INIT(stcb);
3414         /* setup back pointer's */
3415         stcb->sctp_ep = inp;
3416         stcb->sctp_socket = inp->sctp_socket;
3417         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3418                 /* failed */
3419                 SCTP_TCB_LOCK_DESTROY(stcb);
3420                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3421                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3422                 SCTP_DECR_ASOC_COUNT();
3423                 *error = err;
3424                 return (NULL);
3425         }
3426         /* and the port */
3427         stcb->rport = rport;
3428         SCTP_INP_INFO_WLOCK();
3429         SCTP_INP_WLOCK(inp);
3430         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3431                 /* inpcb freed while alloc going on */
3432                 SCTP_TCB_LOCK_DESTROY(stcb);
3433                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3434                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3435                 SCTP_INP_WUNLOCK(inp);
3436                 SCTP_INP_INFO_WUNLOCK();
3437                 SCTP_DECR_ASOC_COUNT();
3438                 *error = EINVAL;
3439                 return (NULL);
3440         }
3441         SCTP_TCB_LOCK(stcb);
3442
3443         /* now that my_vtag is set, add it to the hash */
3444         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3445             sctppcbinfo.hashasocmark)];
3446         /* put it in the bucket in the vtag hash of assoc's for the system */
3447         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3448         SCTP_INP_INFO_WUNLOCK();
3449
3450         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3451                 /* failure.. memory error? */
3452                 if (asoc->strmout) {
3453                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3454                         asoc->strmout = NULL;
3455                 }
3456                 if (asoc->mapping_array) {
3457                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3458                         asoc->mapping_array = NULL;
3459                 }
3460                 SCTP_DECR_ASOC_COUNT();
3461                 SCTP_TCB_LOCK_DESTROY(stcb);
3462                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3463                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3464                 SCTP_INP_WUNLOCK(inp);
3465                 *error = ENOBUFS;
3466                 return (NULL);
3467         }
3468         /* Init all the timers */
3469         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3470         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3471         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3472         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3473         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3474         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3475         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3476
3477         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3478         /* now file the port under the hash as well */
3479         if (inp->sctp_tcbhash != NULL) {
3480                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3481                     inp->sctp_hashmark)];
3482                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3483         }
3484         SCTP_INP_WUNLOCK(inp);
3485         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3486         return (stcb);
3487 }
3488
3489
3490 void
3491 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3492 {
3493         struct sctp_association *asoc;
3494
3495         asoc = &stcb->asoc;
3496         asoc->numnets--;
3497         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3498         if (net == asoc->primary_destination) {
3499                 /* Reset primary */
3500                 struct sctp_nets *lnet;
3501
3502                 lnet = TAILQ_FIRST(&asoc->nets);
3503                 /* Try to find a confirmed primary */
3504                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3505         }
3506         if (net == asoc->last_data_chunk_from) {
3507                 /* Reset primary */
3508                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3509         }
3510         if (net == asoc->last_control_chunk_from) {
3511                 /* Clear net */
3512                 asoc->last_control_chunk_from = NULL;
3513         }
3514         sctp_free_remote_addr(net);
3515 }
3516
3517 /*
3518  * remove a remote endpoint address from an association, it will fail if the
3519  * address does not exist.
3520  */
3521 int
3522 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3523 {
3524         /*
3525          * Here we need to remove a remote address. This is quite simple, we
3526          * first find it in the list of address for the association
3527          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3528          * on that item. Note we do not allow it to be removed if there are
3529          * no other addresses.
3530          */
3531         struct sctp_association *asoc;
3532         struct sctp_nets *net, *net_tmp;
3533
3534         asoc = &stcb->asoc;
3535
3536         /* locate the address */
3537         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3538                 net_tmp = TAILQ_NEXT(net, sctp_next);
3539                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3540                         continue;
3541                 }
3542                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3543                     remaddr)) {
3544                         /* we found the guy */
3545                         if (asoc->numnets < 2) {
3546                                 /* Must have at LEAST two remote addresses */
3547                                 return (-1);
3548                         } else {
3549                                 sctp_remove_net(stcb, net);
3550                                 return (0);
3551                         }
3552                 }
3553         }
3554         /* not found. */
3555         return (-2);
3556 }
3557
3558
3559 void
3560 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time)
3561 {
3562         struct sctpvtaghead *chain;
3563         struct sctp_tagblock *twait_block;
3564         struct timeval now;
3565         int set, i;
3566
3567         (void)SCTP_GETTIME_TIMEVAL(&now);
3568         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3569         set = 0;
3570         if (!SCTP_LIST_EMPTY(chain)) {
3571                 /* Block(s) present, lets find space, and expire on the fly */
3572                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3573                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3574                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3575                                     !set) {
3576                                         twait_block->vtag_block[i].tv_sec_at_expire =
3577                                             now.tv_sec + time;
3578                                         twait_block->vtag_block[i].v_tag = tag;
3579                                         set = 1;
3580                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3581                                             ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3582                                     now.tv_sec)) {
3583                                         /* Audit expires this guy */
3584                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3585                                         twait_block->vtag_block[i].v_tag = 0;
3586                                         if (set == 0) {
3587                                                 /* Reuse it for my new tag */
3588                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3589                                                 twait_block->vtag_block[0].v_tag = tag;
3590                                                 set = 1;
3591                                         }
3592                                 }
3593                         }
3594                         if (set) {
3595                                 /*
3596                                  * We only do up to the block where we can
3597                                  * place our tag for audits
3598                                  */
3599                                 break;
3600                         }
3601                 }
3602         }
3603         /* Need to add a new block to chain */
3604         if (!set) {
3605                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3606                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
3607                 if (twait_block == NULL) {
3608                         return;
3609                 }
3610                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
3611                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3612                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3613                     SCTP_TIME_WAIT;
3614                 twait_block->vtag_block[0].v_tag = tag;
3615         }
3616 }
3617
3618
3619 static void
3620 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3621 {
3622         struct sctp_iterator *it;
3623
3624         /*
3625          * Unlock the tcb lock we do this so we avoid a dead lock scenario
3626          * where the iterator is waiting on the TCB lock and the TCB lock is
3627          * waiting on the iterator lock.
3628          */
3629         it = stcb->asoc.stcb_starting_point_for_iterator;
3630         if (it == NULL) {
3631                 return;
3632         }
3633         if (it->inp != stcb->sctp_ep) {
3634                 /* hmm, focused on the wrong one? */
3635                 return;
3636         }
3637         if (it->stcb != stcb) {
3638                 return;
3639         }
3640         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3641         if (it->stcb == NULL) {
3642                 /* done with all asoc's in this assoc */
3643                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3644                         it->inp = NULL;
3645                 } else {
3646                         it->inp = LIST_NEXT(inp, sctp_list);
3647                 }
3648         }
3649 }
3650
3651
3652 /*
3653  * Free the association after un-hashing the remote port.
3654  */
3655 int
3656 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
3657 {
3658         int i;
3659         struct sctp_association *asoc;
3660         struct sctp_nets *net, *prev;
3661         struct sctp_laddr *laddr;
3662         struct sctp_tmit_chunk *chk;
3663         struct sctp_asconf_addr *aparam;
3664         struct sctp_stream_reset_list *liste;
3665         struct sctp_queued_to_read *sq;
3666         struct sctp_stream_queue_pending *sp;
3667         sctp_sharedkey_t *shared_key;
3668         struct socket *so;
3669         int ccnt = 0;
3670         int cnt = 0;
3671
3672         /* first, lets purge the entry from the hash table. */
3673
3674 #ifdef SCTP_LOG_CLOSING
3675         sctp_log_closing(inp, stcb, 6);
3676 #endif
3677         if (stcb->asoc.state == 0) {
3678 #ifdef SCTP_LOG_CLOSING
3679                 sctp_log_closing(inp, NULL, 7);
3680 #endif
3681                 /* there is no asoc, really TSNH :-0 */
3682                 return (1);
3683         }
3684         /* TEMP CODE */
3685         if (stcb->freed_from_where == 0) {
3686                 /* Only record the first place free happened from */
3687                 stcb->freed_from_where = from_location;
3688         }
3689         /* TEMP CODE */
3690
3691         asoc = &stcb->asoc;
3692         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3693             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3694                 /* nothing around */
3695                 so = NULL;
3696         else
3697                 so = inp->sctp_socket;
3698
3699         /*
3700          * We used timer based freeing if a reader or writer is in the way.
3701          * So we first check if we are actually being called from a timer,
3702          * if so we abort early if a reader or writer is still in the way.
3703          */
3704         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3705             (from_inpcbfree == SCTP_NORMAL_PROC)) {
3706                 /*
3707                  * is it the timer driving us? if so are the reader/writers
3708                  * gone?
3709                  */
3710                 if (stcb->asoc.refcnt) {
3711                         /* nope, reader or writer in the way */
3712                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3713                         /* no asoc destroyed */
3714                         SCTP_TCB_UNLOCK(stcb);
3715 #ifdef SCTP_LOG_CLOSING
3716                         sctp_log_closing(inp, stcb, 8);
3717 #endif
3718                         return (0);
3719                 }
3720         }
3721         /* now clean up any other timers */
3722         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3723         asoc->hb_timer.self = NULL;
3724         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3725         asoc->dack_timer.self = NULL;
3726         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3727         /*-
3728          * For stream reset we don't blast this unless
3729          * it is a str-reset timer, it might be the
3730          * free-asoc timer which we DON'T want to
3731          * disturb.
3732          */
3733         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
3734                 asoc->strreset_timer.self = NULL;
3735         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3736         asoc->asconf_timer.self = NULL;
3737         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3738         asoc->autoclose_timer.self = NULL;
3739         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3740         asoc->shut_guard_timer.self = NULL;
3741         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3742         asoc->delayed_event_timer.self = NULL;
3743         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3744                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3745                 net->fr_timer.self = NULL;
3746                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3747                 net->rxt_timer.self = NULL;
3748                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3749                 net->pmtu_timer.self = NULL;
3750         }
3751         /* Now the read queue needs to be cleaned up (only once) */
3752         cnt = 0;
3753         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
3754                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3755                 SCTP_INP_READ_LOCK(inp);
3756                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
3757                         if (sq->stcb == stcb) {
3758                                 sq->do_not_ref_stcb = 1;
3759                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3760                                 /*
3761                                  * If there is no end, there never will be
3762                                  * now.
3763                                  */
3764                                 if (sq->end_added == 0) {
3765                                         /* Held for PD-API clear that. */
3766                                         sq->pdapi_aborted = 1;
3767                                         sq->held_length = 0;
3768                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3769                                                 /*
3770                                                  * Need to add a PD-API
3771                                                  * aborted indication.
3772                                                  * Setting the control_pdapi
3773                                                  * assures that it will be
3774                                                  * added right after this
3775                                                  * msg.
3776                                                  */
3777                                                 uint32_t strseq;
3778
3779                                                 stcb->asoc.control_pdapi = sq;
3780                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
3781                                                 sctp_notify_partial_delivery_indication(stcb,
3782                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
3783                                                 stcb->asoc.control_pdapi = NULL;
3784                                         }
3785                                 }
3786                                 /* Add an end to wake them */
3787                                 sq->end_added = 1;
3788                                 cnt++;
3789                         }
3790                 }
3791                 SCTP_INP_READ_UNLOCK(inp);
3792                 if (stcb->block_entry) {
3793                         cnt++;
3794                         stcb->block_entry->error = ECONNRESET;
3795                         stcb->block_entry = NULL;
3796                 }
3797         }
3798         if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) {
3799                 /*
3800                  * reader or writer in the way, we have hopefully given him
3801                  * something to chew on above.
3802                  */
3803                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3804                 SCTP_TCB_UNLOCK(stcb);
3805                 if (so) {
3806                         SCTP_INP_RLOCK(inp);
3807                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3808                             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3809                                 /* nothing around */
3810                                 so = NULL;
3811                         if (so) {
3812                                 /* Wake any reader/writers */
3813                                 sctp_sorwakeup(inp, so);
3814                                 sctp_sowwakeup(inp, so);
3815                         }
3816                         SCTP_INP_RUNLOCK(inp);
3817
3818                 }
3819 #ifdef SCTP_LOG_CLOSING
3820                 sctp_log_closing(inp, stcb, 9);
3821 #endif
3822                 /* no asoc destroyed */
3823                 return (0);
3824         }
3825 #ifdef SCTP_LOG_CLOSING
3826         sctp_log_closing(inp, stcb, 10);
3827 #endif
3828         /*
3829          * When I reach here, no others want to kill the assoc yet.. and I
3830          * own the lock. Now its possible an abort comes in when I do the
3831          * lock exchange below to grab all the locks to do the final take
3832          * out. to prevent this we increment the count, which will start a
3833          * timer and blow out above thus assuring us that we hold exclusive
3834          * killing of the asoc. Note that after getting back the TCB lock we
3835          * will go ahead and increment the counter back up and stop any
3836          * timer a passing stranger may have started :-S
3837          */
3838         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3839                 atomic_add_int(&stcb->asoc.refcnt, 1);
3840
3841                 SCTP_TCB_UNLOCK(stcb);
3842
3843                 SCTP_ITERATOR_LOCK();
3844                 SCTP_INP_INFO_WLOCK();
3845                 SCTP_INP_WLOCK(inp);
3846                 SCTP_TCB_LOCK(stcb);
3847         }
3848         /* Double check the GONE flag */
3849         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3850             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3851                 /* nothing around */
3852                 so = NULL;
3853
3854         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3855             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3856                 /*
3857                  * For TCP type we need special handling when we are
3858                  * connected. We also include the peel'ed off ones to.
3859                  */
3860                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3861                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3862                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3863                         if (so) {
3864                                 SOCK_LOCK(so);
3865                                 if (so->so_rcv.sb_cc == 0) {
3866                                         so->so_state &= ~(SS_ISCONNECTING |
3867                                             SS_ISDISCONNECTING |
3868                                             SS_ISCONFIRMING |
3869                                             SS_ISCONNECTED);
3870                                 }
3871                                 SOCK_UNLOCK(so);
3872                                 sctp_sowwakeup(inp, so);
3873                                 sctp_sorwakeup(inp, so);
3874                                 SCTP_SOWAKEUP(so);
3875                         }
3876                 }
3877         }
3878         /*
3879          * Make it invalid too, that way if its about to run it will abort
3880          * and return.
3881          */
3882         sctp_iterator_asoc_being_freed(inp, stcb);
3883         /* re-increment the lock */
3884         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3885                 atomic_add_int(&stcb->asoc.refcnt, -1);
3886         }
3887         asoc->state = 0;
3888         if (inp->sctp_tcbhash) {
3889                 LIST_REMOVE(stcb, sctp_tcbhash);
3890         }
3891         if (stcb->asoc.in_restart_hash) {
3892                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3893         }
3894         /* Now lets remove it from the list of ALL associations in the EP */
3895         LIST_REMOVE(stcb, sctp_tcblist);
3896         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3897                 SCTP_INP_INCR_REF(inp);
3898                 SCTP_INP_WUNLOCK(inp);
3899                 SCTP_ITERATOR_UNLOCK();
3900         }
3901         /* pull from vtag hash */
3902         LIST_REMOVE(stcb, sctp_asocs);
3903         sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT);
3904
3905
3906         /*
3907          * Now restop the timers to be sure - this is paranoia at is finest!
3908          */
3909         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3910         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3911         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3912         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3913         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3914         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3915         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3916         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3917
3918         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3919                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3920                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3921                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3922         }
3923
3924         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3925         prev = NULL;
3926         /*
3927          * The chunk lists and such SHOULD be empty but we check them just
3928          * in case.
3929          */
3930         /* anything on the wheel needs to be removed */
3931         for (i = 0; i < asoc->streamoutcnt; i++) {
3932                 struct sctp_stream_out *outs;
3933
3934                 outs = &asoc->strmout[i];
3935                 /* now clean up any chunks here */
3936                 sp = TAILQ_FIRST(&outs->outqueue);
3937                 while (sp) {
3938                         TAILQ_REMOVE(&outs->outqueue, sp, next);
3939                         if (sp->data) {
3940                                 sctp_m_freem(sp->data);
3941                                 sp->data = NULL;
3942                                 sp->tail_mbuf = NULL;
3943                         }
3944                         sctp_free_remote_addr(sp->net);
3945                         sctp_free_spbufspace(stcb, asoc, sp);
3946                         /* Free the zone stuff  */
3947                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3948                         SCTP_DECR_STRMOQ_COUNT();
3949                         /* sa_ignore FREED_MEMORY */
3950                         sp = TAILQ_FIRST(&outs->outqueue);
3951                 }
3952         }
3953
3954         /* sa_ignore FREED_MEMORY */
3955         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3956                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3957                 SCTP_FREE(liste, SCTP_M_STRESET);
3958         }
3959
3960         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3961         while (sq) {
3962                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3963                 if (sq->data) {
3964                         sctp_m_freem(sq->data);
3965                         sq->data = NULL;
3966                 }
3967                 sctp_free_remote_addr(sq->whoFrom);
3968                 sq->whoFrom = NULL;
3969                 sq->stcb = NULL;
3970                 /* Free the ctl entry */
3971                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3972                 SCTP_DECR_READQ_COUNT();
3973                 /* sa_ignore FREED_MEMORY */
3974                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3975         }
3976
3977         chk = TAILQ_FIRST(&asoc->free_chunks);
3978         while (chk) {
3979                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3980                 if (chk->data) {
3981                         sctp_m_freem(chk->data);
3982                         chk->data = NULL;
3983                 }
3984                 ccnt++;
3985                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3986                 SCTP_DECR_CHK_COUNT();
3987                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
3988                 asoc->free_chunk_cnt--;
3989                 /* sa_ignore FREED_MEMORY */
3990                 chk = TAILQ_FIRST(&asoc->free_chunks);
3991         }
3992         /* pending send queue SHOULD be empty */
3993         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3994                 chk = TAILQ_FIRST(&asoc->send_queue);
3995                 while (chk) {
3996                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
3997                         if (chk->data) {
3998                                 sctp_m_freem(chk->data);
3999                                 chk->data = NULL;
4000                         }
4001                         ccnt++;
4002                         sctp_free_remote_addr(chk->whoTo);
4003                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4004                         SCTP_DECR_CHK_COUNT();
4005                         /* sa_ignore FREED_MEMORY */
4006                         chk = TAILQ_FIRST(&asoc->send_queue);
4007                 }
4008         }
4009 /*
4010   if(ccnt) {
4011   printf("Freed %d from send_queue\n", ccnt);
4012   ccnt = 0;
4013   }
4014 */
4015         /* sent queue SHOULD be empty */
4016         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4017                 chk = TAILQ_FIRST(&asoc->sent_queue);
4018                 while (chk) {
4019                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4020                         if (chk->data) {
4021                                 sctp_m_freem(chk->data);
4022                                 chk->data = NULL;
4023                         }
4024                         ccnt++;
4025                         sctp_free_remote_addr(chk->whoTo);
4026                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4027                         SCTP_DECR_CHK_COUNT();
4028                         /* sa_ignore FREED_MEMORY */
4029                         chk = TAILQ_FIRST(&asoc->sent_queue);
4030                 }
4031         }
4032 /*
4033   if(ccnt) {
4034   printf("Freed %d from sent_queue\n", ccnt);
4035   ccnt = 0;
4036   }
4037 */
4038         /* control queue MAY not be empty */
4039         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4040                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4041                 while (chk) {
4042                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4043                         if (chk->data) {
4044                                 sctp_m_freem(chk->data);
4045                                 chk->data = NULL;
4046                         }
4047                         ccnt++;
4048                         sctp_free_remote_addr(chk->whoTo);
4049                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4050                         SCTP_DECR_CHK_COUNT();
4051                         /* sa_ignore FREED_MEMORY */
4052                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4053                 }
4054         }
4055 /*
4056   if(ccnt) {
4057   printf("Freed %d from ctrl_queue\n", ccnt);
4058   ccnt = 0;
4059   }
4060 */
4061         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4062                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4063                 while (chk) {
4064                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4065                         if (chk->data) {
4066                                 sctp_m_freem(chk->data);
4067                                 chk->data = NULL;
4068                         }
4069                         sctp_free_remote_addr(chk->whoTo);
4070                         ccnt++;
4071                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4072                         SCTP_DECR_CHK_COUNT();
4073                         /* sa_ignore FREED_MEMORY */
4074                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4075                 }
4076         }
4077 /*
4078   if(ccnt) {
4079   printf("Freed %d from reasm_queue\n", ccnt);
4080   ccnt = 0;
4081   }
4082 */
4083         if (asoc->mapping_array) {
4084                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4085                 asoc->mapping_array = NULL;
4086         }
4087         /* the stream outs */
4088         if (asoc->strmout) {
4089                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4090                 asoc->strmout = NULL;
4091         }
4092         asoc->streamoutcnt = 0;
4093         if (asoc->strmin) {
4094                 struct sctp_queued_to_read *ctl;
4095
4096                 for (i = 0; i < asoc->streamincnt; i++) {
4097                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4098                                 /* We have somethings on the streamin queue */
4099                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4100                                 while (ctl) {
4101                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4102                                             ctl, next);
4103                                         sctp_free_remote_addr(ctl->whoFrom);
4104                                         if (ctl->data) {
4105                                                 sctp_m_freem(ctl->data);
4106                                                 ctl->data = NULL;
4107                                         }
4108                                         /*
4109                                          * We don't free the address here
4110                                          * since all the net's were freed
4111                                          * above.
4112                                          */
4113                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4114                                         SCTP_DECR_READQ_COUNT();
4115                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4116                                 }
4117                         }
4118                 }
4119                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4120                 asoc->strmin = NULL;
4121         }
4122         asoc->streamincnt = 0;
4123         while (!TAILQ_EMPTY(&asoc->nets)) {
4124                 /* sa_ignore FREED_MEMORY */
4125                 net = TAILQ_FIRST(&asoc->nets);
4126                 /* pull from list */
4127                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4128 #ifdef INVARIANTS
4129                         panic("no net's left alloc'ed, or list points to itself");
4130 #endif
4131                         break;
4132                 }
4133                 prev = net;
4134                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4135                 sctp_free_remote_addr(net);
4136         }
4137
4138         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4139                 /* sa_ignore FREED_MEMORY */
4140                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4141                 sctp_remove_laddr(laddr);
4142         }
4143
4144         /* pending asconf (address) parameters */
4145         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4146                 /* sa_ignore FREED_MEMORY */
4147                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4148                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4149                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4150         }
4151         if (asoc->last_asconf_ack_sent != NULL) {
4152                 sctp_m_freem(asoc->last_asconf_ack_sent);
4153                 asoc->last_asconf_ack_sent = NULL;
4154         }
4155         /* clean up auth stuff */
4156         if (asoc->local_hmacs)
4157                 sctp_free_hmaclist(asoc->local_hmacs);
4158         if (asoc->peer_hmacs)
4159                 sctp_free_hmaclist(asoc->peer_hmacs);
4160
4161         if (asoc->local_auth_chunks)
4162                 sctp_free_chunklist(asoc->local_auth_chunks);
4163         if (asoc->peer_auth_chunks)
4164                 sctp_free_chunklist(asoc->peer_auth_chunks);
4165
4166         sctp_free_authinfo(&asoc->authinfo);
4167
4168         shared_key = LIST_FIRST(&asoc->shared_keys);
4169         while (shared_key) {
4170                 LIST_REMOVE(shared_key, next);
4171                 sctp_free_sharedkey(shared_key);
4172                 /* sa_ignore FREED_MEMORY */
4173                 shared_key = LIST_FIRST(&asoc->shared_keys);
4174         }
4175
4176         /* Insert new items here :> */
4177
4178         /* Get rid of LOCK */
4179         SCTP_TCB_LOCK_DESTROY(stcb);
4180         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4181         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4182                 SCTP_INP_INFO_WUNLOCK();
4183                 SCTP_INP_RLOCK(inp);
4184         }
4185 #ifdef SCTP_TRACK_FREED_ASOCS
4186         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4187                 /* now clean up the tasoc itself */
4188                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4189                 SCTP_DECR_ASOC_COUNT();
4190         } else {
4191                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4192         }
4193 #else
4194         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4195         SCTP_DECR_ASOC_COUNT();
4196 #endif
4197         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4198                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4199                         /*
4200                          * If its NOT the inp_free calling us AND sctp_close
4201                          * as been called, we call back...
4202                          */
4203                         SCTP_INP_RUNLOCK(inp);
4204                         /*
4205                          * This will start the kill timer (if we are the
4206                          * lastone) since we hold an increment yet. But this
4207                          * is the only safe way to do this since otherwise
4208                          * if the socket closes at the same time we are here
4209                          * we might collide in the cleanup.
4210                          */
4211                         sctp_inpcb_free(inp,
4212                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4213                             SCTP_CALLED_DIRECTLY_NOCMPSET);
4214                         SCTP_INP_DECR_REF(inp);
4215                         goto out_of;
4216                 } else {
4217                         /* The socket is still open. */
4218                         SCTP_INP_DECR_REF(inp);
4219                 }
4220         }
4221         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4222                 SCTP_INP_RUNLOCK(inp);
4223         }
4224 out_of:
4225         /* destroyed the asoc */
4226 #ifdef SCTP_LOG_CLOSING
4227         sctp_log_closing(inp, NULL, 11);
4228 #endif
4229         return (1);
4230 }
4231
4232
4233
4234 /*
4235  * determine if a destination is "reachable" based upon the addresses bound
4236  * to the current endpoint (e.g. only v4 or v6 currently bound)
4237  */
4238 /*
4239  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4240  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4241  * types bound as its endpoint
4242  */
4243 int
4244 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4245 {
4246         struct sctp_inpcb *inp;
4247         int answer;
4248
4249         /*
4250          * No locks here, the TCB, in all cases is already locked and an
4251          * assoc is up. There is either a INP lock by the caller applied (in
4252          * asconf case when deleting an address) or NOT in the HB case,
4253          * however if HB then the INP increment is up and the INP will not
4254          * be removed (on top of the fact that we have a TCB lock). So we
4255          * only want to read the sctp_flags, which is either bound-all or
4256          * not.. no protection needed since once an assoc is up you can't be
4257          * changing your binding.
4258          */
4259         inp = stcb->sctp_ep;
4260         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4261                 /* if bound all, destination is not restricted */
4262                 /*
4263                  * RRS: Question during lock work: Is this correct? If you
4264                  * are bound-all you still might need to obey the V4--V6
4265                  * flags??? IMO this bound-all stuff needs to be removed!
4266                  */
4267                 return (1);
4268         }
4269         /* NOTE: all "scope" checks are done when local addresses are added */
4270         if (destaddr->sa_family == AF_INET6) {
4271                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4272         } else if (destaddr->sa_family == AF_INET) {
4273                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4274         } else {
4275                 /* invalid family, so it's unreachable */
4276                 answer = 0;
4277         }
4278         return (answer);
4279 }
4280
4281 /*
4282  * update the inp_vflags on an endpoint
4283  */
4284 static void
4285 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4286 {
4287         struct sctp_laddr *laddr;
4288
4289         /* first clear the flag */
4290         inp->ip_inp.inp.inp_vflag = 0;
4291         /* set the flag based on addresses on the ep list */
4292         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4293                 if (laddr->ifa == NULL) {
4294                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4295                             __FUNCTION__);
4296                         continue;
4297                 }
4298                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4299                         continue;
4300                 }
4301                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4302                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4303                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4304                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4305                 }
4306         }
4307 }
4308
4309 /*
4310  * Add the address to the endpoint local address list There is nothing to be
4311  * done if we are bound to all addresses
4312  */
4313 void
4314 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4315 {
4316         struct sctp_laddr *laddr;
4317         int fnd, error = 0;
4318
4319         fnd = 0;
4320
4321         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4322                 /* You are already bound to all. You have it already */
4323                 return;
4324         }
4325         if (ifa->address.sa.sa_family == AF_INET6) {
4326                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4327                         /* Can't bind a non-useable addr. */
4328                         return;
4329                 }
4330         }
4331         /* first, is it already present? */
4332         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4333                 if (laddr->ifa == ifa) {
4334                         fnd = 1;
4335                         break;
4336                 }
4337         }
4338
4339         if (fnd == 0) {
4340                 /* Not in the ep list */
4341                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4342                 if (error != 0)
4343                         return;
4344                 inp->laddr_count++;
4345                 /* update inp_vflag flags */
4346                 if (ifa->address.sa.sa_family == AF_INET6) {
4347                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4348                 } else if (ifa->address.sa.sa_family == AF_INET) {
4349                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4350                 }
4351         }
4352         return;
4353 }
4354
4355
4356 /*
4357  * select a new (hopefully reachable) destination net (should only be used
4358  * when we deleted an ep addr that is the only usable source address to reach
4359  * the destination net)
4360  */
4361 static void
4362 sctp_select_primary_destination(struct sctp_tcb *stcb)
4363 {
4364         struct sctp_nets *net;
4365
4366         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4367                 /* for now, we'll just pick the first reachable one we find */
4368                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4369                         continue;
4370                 if (sctp_destination_is_reachable(stcb,
4371                     (struct sockaddr *)&net->ro._l_addr)) {
4372                         /* found a reachable destination */
4373                         stcb->asoc.primary_destination = net;
4374                 }
4375         }
4376         /* I can't there from here! ...we're gonna die shortly... */
4377 }
4378
4379
4380 /*
4381  * Delete the address from the endpoint local address list There is nothing
4382  * to be done if we are bound to all addresses
4383  */
4384 void
4385 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4386 {
4387         struct sctp_laddr *laddr;
4388         int fnd;
4389
4390         fnd = 0;
4391         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4392                 /* You are already bound to all. You have it already */
4393                 return;
4394         }
4395         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4396                 if (laddr->ifa == ifa) {
4397                         fnd = 1;
4398                         break;
4399                 }
4400         }
4401         if (fnd && (inp->laddr_count < 2)) {
4402                 /* can't delete unless there are at LEAST 2 addresses */
4403                 return;
4404         }
4405         if (fnd) {
4406                 /*
4407                  * clean up any use of this address go through our
4408                  * associations and clear any last_used_address that match
4409                  * this one for each assoc, see if a new primary_destination
4410                  * is needed
4411                  */
4412                 struct sctp_tcb *stcb;
4413
4414                 /* clean up "next_addr_touse" */
4415                 if (inp->next_addr_touse == laddr)
4416                         /* delete this address */
4417                         inp->next_addr_touse = NULL;
4418
4419                 /* clean up "last_used_address" */
4420                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4421                         struct sctp_nets *net;
4422
4423                         SCTP_TCB_LOCK(stcb);
4424                         if (stcb->asoc.last_used_address == laddr)
4425                                 /* delete this address */
4426                                 stcb->asoc.last_used_address = NULL;
4427                         /*
4428                          * Now spin through all the nets and purge any ref
4429                          * to laddr
4430                          */
4431                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4432                                 if (net->ro._s_addr &&
4433                                     (net->ro._s_addr->ifa == laddr->ifa)) {
4434                                         /* Yep, purge src address selected */
4435                                         sctp_rtentry_t *rt;
4436
4437                                         /* delete this address if cached */
4438                                         rt = net->ro.ro_rt;
4439                                         if (rt != NULL) {
4440                                                 RTFREE(rt);
4441                                                 net->ro.ro_rt = NULL;
4442                                         }
4443                                         sctp_free_ifa(net->ro._s_addr);
4444                                         net->ro._s_addr = NULL;
4445                                         net->src_addr_selected = 0;
4446                                 }
4447                         }
4448                         SCTP_TCB_UNLOCK(stcb);
4449                 }               /* for each tcb */
4450                 /* remove it from the ep list */
4451                 sctp_remove_laddr(laddr);
4452                 inp->laddr_count--;
4453                 /* update inp_vflag flags */
4454                 sctp_update_ep_vflag(inp);
4455         }
4456         return;
4457 }
4458
4459 /*
4460  * Add the addr to the TCB local address list For the BOUNDALL or dynamic
4461  * case, this is a "pending" address list (eg. addresses waiting for an
4462  * ASCONF-ACK response) For the subset binding, static case, this is a
4463  * "valid" address list
4464  */
4465 void
4466 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list)
4467 {
4468         struct sctp_inpcb *inp;
4469         struct sctp_laddr *laddr;
4470         struct sctpladdr *list;
4471
4472         /*
4473          * Assumes TCB is locked.. and possibly the INP. May need to
4474          * confirm/fix that if we need it and is not the case.
4475          */
4476         list = &stcb->asoc.sctp_restricted_addrs;
4477
4478         inp = stcb->sctp_ep;
4479         if (ifa->address.sa.sa_family == AF_INET6) {
4480                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4481                         /* Can't bind a non-existent addr. */
4482                         return;
4483                 }
4484         }
4485         /* does the address already exist? */
4486         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4487                 if (laddr->ifa == ifa) {
4488                         return;
4489                 }
4490         }
4491
4492         /* add to the list */
4493         (void)sctp_insert_laddr(list, ifa, 0);
4494         return;
4495 }
4496
4497 /*
4498  * insert an laddr entry with the given ifa for the desired list
4499  */
4500 int
4501 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4502 {
4503         struct sctp_laddr *laddr;
4504
4505         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4506         if (laddr == NULL) {
4507                 /* out of memory? */
4508                 return (EINVAL);
4509         }
4510         SCTP_INCR_LADDR_COUNT();
4511         bzero(laddr, sizeof(*laddr));
4512         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
4513         laddr->ifa = ifa;
4514         laddr->action = act;
4515         atomic_add_int(&ifa->refcount, 1);
4516         /* insert it */
4517         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4518
4519         return (0);
4520 }
4521
4522 /*
4523  * Remove an laddr entry from the local address list (on an assoc)
4524  */
4525 void
4526 sctp_remove_laddr(struct sctp_laddr *laddr)
4527 {
4528
4529         /* remove from the list */
4530         LIST_REMOVE(laddr, sctp_nxt_addr);
4531         sctp_free_ifa(laddr->ifa);
4532         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4533         SCTP_DECR_LADDR_COUNT();
4534 }
4535
4536 /*
4537  * Remove an address from the TCB local address list
4538  */
4539 void
4540 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4541 {
4542         struct sctp_inpcb *inp;
4543         struct sctp_laddr *laddr;
4544
4545         /*
4546          * This is called by asconf work. It is assumed that a) The TCB is
4547          * locked and b) The INP is locked. This is true in as much as I can
4548          * trace through the entry asconf code where I did these locks.
4549          * Again, the ASCONF code is a bit different in that it does lock
4550          * the INP during its work often times. This must be since we don't
4551          * want other proc's looking up things while what they are looking
4552          * up is changing :-D
4553          */
4554
4555         inp = stcb->sctp_ep;
4556         /* if subset bound and don't allow ASCONF's, can't delete last */
4557         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4558             (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) {
4559                 if (stcb->asoc.numnets < 2) {
4560                         /* can't delete last address */
4561                         return;
4562                 }
4563         }
4564         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4565                 /* remove the address if it exists */
4566                 if (laddr->ifa == NULL)
4567                         continue;
4568                 if (laddr->ifa == ifa) {
4569                         sctp_remove_laddr(laddr);
4570                         return;
4571                 }
4572         }
4573
4574         /* address not found! */
4575         return;
4576 }
4577
4578 static char sctp_pcb_initialized = 0;
4579
4580 /*
4581  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4582  */
4583 /* sysctl */
4584 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4585 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4586
4587 void
4588 sctp_pcb_init()
4589 {
4590         /*
4591          * SCTP initialization for the PCB structures should be called by
4592          * the sctp_init() funciton.
4593          */
4594         int i;
4595
4596         if (sctp_pcb_initialized != 0) {
4597                 /* error I was called twice */
4598                 return;
4599         }
4600         sctp_pcb_initialized = 1;
4601
4602         bzero(&sctpstat, sizeof(struct sctpstat));
4603         (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime);
4604         /* init the empty list of (All) Endpoints */
4605         LIST_INIT(&sctppcbinfo.listhead);
4606
4607         /* init the iterator head */
4608         TAILQ_INIT(&sctppcbinfo.iteratorhead);
4609
4610         /* init the hash table of endpoints */
4611         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4612         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4613         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4614         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
4615             &sctppcbinfo.hashasocmark);
4616         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
4617             &sctppcbinfo.hashmark);
4618         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
4619             &sctppcbinfo.hashtcpmark);
4620         sctppcbinfo.hashtblsize = sctp_hashtblsize;
4621
4622         /* init the small hash table we use to track restarted asoc's */
4623         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
4624             &sctppcbinfo.hashrestartmark);
4625
4626
4627         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
4628             &sctppcbinfo.hashvrfmark);
4629
4630         sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
4631             &sctppcbinfo.vrf_ifn_hashmark);
4632
4633         /* init the zones */
4634         /*
4635          * FIX ME: Should check for NULL returns, but if it does fail we are
4636          * doomed to panic anyways... add later maybe.
4637          */
4638         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4639             sizeof(struct sctp_inpcb), maxsockets);
4640
4641         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4642             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4643
4644         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4645             sizeof(struct sctp_laddr),
4646             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4647
4648         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4649             sizeof(struct sctp_nets),
4650             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4651
4652         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4653             sizeof(struct sctp_tmit_chunk),
4654             (sctp_max_number_of_assoc * sctp_chunkscale));
4655
4656         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4657             sizeof(struct sctp_queued_to_read),
4658             (sctp_max_number_of_assoc * sctp_chunkscale));
4659
4660         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4661             sizeof(struct sctp_stream_queue_pending),
4662             (sctp_max_number_of_assoc * sctp_chunkscale));
4663
4664         /* Master Lock INIT for info structure */
4665         SCTP_INP_INFO_LOCK_INIT();
4666         SCTP_STATLOG_INIT_LOCK();
4667         SCTP_ITERATOR_LOCK_INIT();
4668
4669         SCTP_IPI_COUNT_INIT();
4670         SCTP_IPI_ADDR_INIT();
4671         SCTP_IPI_ITERATOR_WQ_INIT();
4672 #ifdef SCTP_PACKET_LOGGING
4673         SCTP_IP_PKTLOG_INIT();
4674 #endif
4675         LIST_INIT(&sctppcbinfo.addr_wq);
4676
4677         /* not sure if we need all the counts */
4678         sctppcbinfo.ipi_count_ep = 0;
4679         /* assoc/tcb zone info */
4680         sctppcbinfo.ipi_count_asoc = 0;
4681         /* local addrlist zone info */
4682         sctppcbinfo.ipi_count_laddr = 0;
4683         /* remote addrlist zone info */
4684         sctppcbinfo.ipi_count_raddr = 0;
4685         /* chunk info */
4686         sctppcbinfo.ipi_count_chunk = 0;
4687
4688         /* socket queue zone info */
4689         sctppcbinfo.ipi_count_readq = 0;
4690
4691         /* stream out queue cont */
4692         sctppcbinfo.ipi_count_strmoq = 0;
4693
4694         sctppcbinfo.ipi_free_strmoq = 0;
4695         sctppcbinfo.ipi_free_chunks = 0;
4696
4697         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
4698
4699         /* Init the TIMEWAIT list */
4700         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
4701                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4702         }
4703
4704 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
4705         sctppcbinfo.iterator_running = 0;
4706         sctp_startup_iterator();
4707 #endif
4708
4709         /*
4710          * INIT the default VRF which for BSD is the only one, other O/S's
4711          * may have more. But initially they must start with one and then
4712          * add the VRF's as addresses are added.
4713          */
4714         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
4715
4716 }
4717
4718
4719 int
4720 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4721     int iphlen, int offset, int limit, struct sctphdr *sh,
4722     struct sockaddr *altsa)
4723 {
4724         /*
4725          * grub through the INIT pulling addresses and loading them to the
4726          * nets structure in the asoc. The from address in the mbuf should
4727          * also be loaded (if it is not already). This routine can be called
4728          * with either INIT or INIT-ACK's as long as the m points to the IP
4729          * packet and the offset points to the beginning of the parameters.
4730          */
4731         struct sctp_inpcb *inp, *l_inp;
4732         struct sctp_nets *net, *net_tmp;
4733         struct ip *iph;
4734         struct sctp_paramhdr *phdr, parm_buf;
4735         struct sctp_tcb *stcb_tmp;
4736         uint16_t ptype, plen;
4737         struct sockaddr *sa;
4738         struct sockaddr_storage dest_store;
4739         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4740         struct sockaddr_in sin;
4741         struct sockaddr_in6 sin6;
4742         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
4743         struct sctp_auth_random *p_random = NULL;
4744         uint16_t random_len = 0;
4745         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
4746         struct sctp_auth_hmac_algo *hmacs = NULL;
4747         uint16_t hmacs_len = 0;
4748         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
4749         struct sctp_auth_chunk_list *chunks = NULL;
4750         uint16_t num_chunks = 0;
4751         sctp_key_t *new_key;
4752         uint32_t keylen;
4753         int got_random = 0, got_hmacs = 0, got_chklist = 0;
4754
4755         /* First get the destination address setup too. */
4756         memset(&sin, 0, sizeof(sin));
4757         memset(&sin6, 0, sizeof(sin6));
4758
4759         sin.sin_family = AF_INET;
4760         sin.sin_len = sizeof(sin);
4761         sin.sin_port = stcb->rport;
4762
4763         sin6.sin6_family = AF_INET6;
4764         sin6.sin6_len = sizeof(struct sockaddr_in6);
4765         sin6.sin6_port = stcb->rport;
4766         if (altsa == NULL) {
4767                 iph = mtod(m, struct ip *);
4768                 if (iph->ip_v == IPVERSION) {
4769                         /* its IPv4 */
4770                         struct sockaddr_in *sin_2;
4771
4772                         sin_2 = (struct sockaddr_in *)(local_sa);
4773                         memset(sin_2, 0, sizeof(sin));
4774                         sin_2->sin_family = AF_INET;
4775                         sin_2->sin_len = sizeof(sin);
4776                         sin_2->sin_port = sh->dest_port;
4777                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4778                         sin.sin_addr = iph->ip_src;
4779                         sa = (struct sockaddr *)&sin;
4780                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4781                         /* its IPv6 */
4782                         struct ip6_hdr *ip6;
4783                         struct sockaddr_in6 *sin6_2;
4784
4785                         ip6 = mtod(m, struct ip6_hdr *);
4786                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4787                         memset(sin6_2, 0, sizeof(sin6));
4788                         sin6_2->sin6_family = AF_INET6;
4789                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4790                         sin6_2->sin6_port = sh->dest_port;
4791                         sin6.sin6_addr = ip6->ip6_src;
4792                         sa = (struct sockaddr *)&sin6;
4793                 } else {
4794                         sa = NULL;
4795                 }
4796         } else {
4797                 /*
4798                  * For cookies we use the src address NOT from the packet
4799                  * but from the original INIT
4800                  */
4801                 sa = altsa;
4802         }
4803         /* Turn off ECN until we get through all params */
4804         stcb->asoc.ecn_allowed = 0;
4805         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4806                 /* mark all addresses that we have currently on the list */
4807                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4808         }
4809         /* does the source address already exist? if so skip it */
4810         l_inp = inp = stcb->sctp_ep;
4811
4812         atomic_add_int(&stcb->asoc.refcnt, 1);
4813         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4814         atomic_add_int(&stcb->asoc.refcnt, -1);
4815
4816         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4817                 /* we must add the source address */
4818                 /* no scope set here since we have a tcb already. */
4819                 if ((sa->sa_family == AF_INET) &&
4820                     (stcb->asoc.ipv4_addr_legal)) {
4821                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
4822                                 return (-1);
4823                         }
4824                 } else if ((sa->sa_family == AF_INET6) &&
4825                     (stcb->asoc.ipv6_addr_legal)) {
4826                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
4827                                 return (-2);
4828                         }
4829                 }
4830         } else {
4831                 if (net_tmp != NULL && stcb_tmp == stcb) {
4832                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4833                 } else if (stcb_tmp != stcb) {
4834                         /* It belongs to another association? */
4835                         if (stcb_tmp)
4836                                 SCTP_TCB_UNLOCK(stcb_tmp);
4837                         return (-3);
4838                 }
4839         }
4840         if (stcb->asoc.state == 0) {
4841                 /* the assoc was freed? */
4842                 return (-4);
4843         }
4844         /* now we must go through each of the params. */
4845         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4846         while (phdr) {
4847                 ptype = ntohs(phdr->param_type);
4848                 plen = ntohs(phdr->param_length);
4849                 /*
4850                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4851                  * (int)plen);
4852                  */
4853                 if (offset + plen > limit) {
4854                         break;
4855                 }
4856                 if (plen == 0) {
4857                         break;
4858                 }
4859                 if (ptype == SCTP_IPV4_ADDRESS) {
4860                         if (stcb->asoc.ipv4_addr_legal) {
4861                                 struct sctp_ipv4addr_param *p4, p4_buf;
4862
4863                                 /* ok get the v4 address and check/add */
4864                                 phdr = sctp_get_next_param(m, offset,
4865                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4866                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4867                                     phdr == NULL) {
4868                                         return (-5);
4869                                 }
4870                                 p4 = (struct sctp_ipv4addr_param *)phdr;
4871                                 sin.sin_addr.s_addr = p4->addr;
4872                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
4873                                         /* Skip multi-cast addresses */
4874                                         goto next_param;
4875                                 }
4876                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
4877                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
4878                                         goto next_param;
4879                                 }
4880                                 sa = (struct sockaddr *)&sin;
4881                                 inp = stcb->sctp_ep;
4882                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4883                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4884                                     local_sa, stcb);
4885                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4886
4887                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4888                                     inp == NULL) {
4889                                         /* we must add the source address */
4890                                         /*
4891                                          * no scope set since we have a tcb
4892                                          * already
4893                                          */
4894
4895                                         /*
4896                                          * we must validate the state again
4897                                          * here
4898                                          */
4899                                         if (stcb->asoc.state == 0) {
4900                                                 /* the assoc was freed? */
4901                                                 return (-7);
4902                                         }
4903                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
4904                                                 return (-8);
4905                                         }
4906                                 } else if (stcb_tmp == stcb) {
4907                                         if (stcb->asoc.state == 0) {
4908                                                 /* the assoc was freed? */
4909                                                 return (-10);
4910                                         }
4911                                         if (net != NULL) {
4912                                                 /* clear flag */
4913                                                 net->dest_state &=
4914                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4915                                         }
4916                                 } else {
4917                                         /*
4918                                          * strange, address is in another
4919                                          * assoc? straighten out locks.
4920                                          */
4921                                         if (stcb->asoc.state == 0) {
4922                                                 /* the assoc was freed? */
4923                                                 return (-12);
4924                                         }
4925                                         return (-13);
4926                                 }
4927                         }
4928                 } else if (ptype == SCTP_IPV6_ADDRESS) {
4929                         if (stcb->asoc.ipv6_addr_legal) {
4930                                 /* ok get the v6 address and check/add */
4931                                 struct sctp_ipv6addr_param *p6, p6_buf;
4932
4933                                 phdr = sctp_get_next_param(m, offset,
4934                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4935                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4936                                     phdr == NULL) {
4937                                         return (-14);
4938                                 }
4939                                 p6 = (struct sctp_ipv6addr_param *)phdr;
4940                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4941                                     sizeof(p6->addr));
4942                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
4943                                         /* Skip multi-cast addresses */
4944                                         goto next_param;
4945                                 }
4946                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
4947                                         /*
4948                                          * Link local make no sense without
4949                                          * scope
4950                                          */
4951                                         goto next_param;
4952                                 }
4953                                 sa = (struct sockaddr *)&sin6;
4954                                 inp = stcb->sctp_ep;
4955                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4956                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4957                                     local_sa, stcb);
4958                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4959                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4960                                     inp == NULL)) {
4961                                         /*
4962                                          * we must validate the state again
4963                                          * here
4964                                          */
4965                                         if (stcb->asoc.state == 0) {
4966                                                 /* the assoc was freed? */
4967                                                 return (-16);
4968                                         }
4969                                         /*
4970                                          * we must add the address, no scope
4971                                          * set
4972                                          */
4973                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
4974                                                 return (-17);
4975                                         }
4976                                 } else if (stcb_tmp == stcb) {
4977                                         /*
4978                                          * we must validate the state again
4979                                          * here
4980                                          */
4981                                         if (stcb->asoc.state == 0) {
4982                                                 /* the assoc was freed? */
4983                                                 return (-19);
4984                                         }
4985                                         if (net != NULL) {
4986                                                 /* clear flag */
4987                                                 net->dest_state &=
4988                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4989                                         }
4990                                 } else {
4991                                         /*
4992                                          * strange, address is in another
4993                                          * assoc? straighten out locks.
4994                                          */
4995                                         if (stcb->asoc.state == 0) {
4996                                                 /* the assoc was freed? */
4997                                                 return (-21);
4998                                         }
4999                                         return (-22);
5000                                 }
5001                         }
5002                 } else if (ptype == SCTP_ECN_CAPABLE) {
5003                         stcb->asoc.ecn_allowed = 1;
5004                 } else if (ptype == SCTP_ULP_ADAPTATION) {
5005                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
5006                                 struct sctp_adaptation_layer_indication ai,
5007                                                                 *aip;
5008
5009                                 phdr = sctp_get_next_param(m, offset,
5010                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
5011                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
5012                                 if (aip) {
5013                                         sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
5014                                             stcb, ntohl(aip->indication), NULL);
5015                                 }
5016                         }
5017                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5018                         struct sctp_asconf_addr_param lstore, *fee;
5019                         struct sctp_asconf_addrv4_param *fii;
5020                         int lptype;
5021                         struct sockaddr *lsa = NULL;
5022
5023                         stcb->asoc.peer_supports_asconf = 1;
5024                         if (plen > sizeof(lstore)) {
5025                                 return (-23);
5026                         }
5027                         phdr = sctp_get_next_param(m, offset,
5028                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5029                         if (phdr == NULL) {
5030                                 return (-24);
5031                         }
5032                         fee = (struct sctp_asconf_addr_param *)phdr;
5033                         lptype = ntohs(fee->addrp.ph.param_type);
5034                         if (lptype == SCTP_IPV4_ADDRESS) {
5035                                 if (plen !=
5036                                     sizeof(struct sctp_asconf_addrv4_param)) {
5037                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5038                                             (int)sizeof(struct sctp_asconf_addrv4_param),
5039                                             plen);
5040                                 } else {
5041                                         fii = (struct sctp_asconf_addrv4_param *)fee;
5042                                         sin.sin_addr.s_addr = fii->addrp.addr;
5043                                         lsa = (struct sockaddr *)&sin;
5044                                 }
5045                         } else if (lptype == SCTP_IPV6_ADDRESS) {
5046                                 if (plen !=
5047                                     sizeof(struct sctp_asconf_addr_param)) {
5048                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5049                                             (int)sizeof(struct sctp_asconf_addr_param),
5050                                             plen);
5051                                 } else {
5052                                         memcpy(sin6.sin6_addr.s6_addr,
5053                                             fee->addrp.addr,
5054                                             sizeof(fee->addrp.addr));
5055                                         lsa = (struct sockaddr *)&sin6;
5056                                 }
5057                         }
5058                         if (lsa) {
5059                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
5060                         }
5061                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5062                         /* Peer supports pr-sctp */
5063                         stcb->asoc.peer_supports_prsctp = 1;
5064                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5065                         /* A supported extension chunk */
5066                         struct sctp_supported_chunk_types_param *pr_supported;
5067                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5068                         int num_ent, i;
5069
5070                         phdr = sctp_get_next_param(m, offset,
5071                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5072                         if (phdr == NULL) {
5073                                 return (-25);
5074                         }
5075                         stcb->asoc.peer_supports_asconf = 0;
5076                         stcb->asoc.peer_supports_prsctp = 0;
5077                         stcb->asoc.peer_supports_pktdrop = 0;
5078                         stcb->asoc.peer_supports_strreset = 0;
5079                         stcb->asoc.peer_supports_auth = 0;
5080                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5081                         num_ent = plen - sizeof(struct sctp_paramhdr);
5082                         for (i = 0; i < num_ent; i++) {
5083                                 switch (pr_supported->chunk_types[i]) {
5084                                 case SCTP_ASCONF:
5085                                 case SCTP_ASCONF_ACK:
5086                                         stcb->asoc.peer_supports_asconf = 1;
5087                                         break;
5088                                 case SCTP_FORWARD_CUM_TSN:
5089                                         stcb->asoc.peer_supports_prsctp = 1;
5090                                         break;
5091                                 case SCTP_PACKET_DROPPED:
5092                                         stcb->asoc.peer_supports_pktdrop = 1;
5093                                         break;
5094                                 case SCTP_STREAM_RESET:
5095                                         stcb->asoc.peer_supports_strreset = 1;
5096                                         break;
5097                                 case SCTP_AUTHENTICATION:
5098                                         stcb->asoc.peer_supports_auth = 1;
5099                                         break;
5100                                 default:
5101                                         /* one I have not learned yet */
5102                                         break;
5103
5104                                 }
5105                         }
5106                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5107                         /* Peer supports ECN-nonce */
5108                         stcb->asoc.peer_supports_ecn_nonce = 1;
5109                         stcb->asoc.ecn_nonce_allowed = 1;
5110                 } else if (ptype == SCTP_RANDOM) {
5111                         if (plen > sizeof(random_store))
5112                                 break;
5113                         if (got_random) {
5114                                 /* already processed a RANDOM */
5115                                 goto next_param;
5116                         }
5117                         phdr = sctp_get_next_param(m, offset,
5118                             (struct sctp_paramhdr *)random_store,
5119                             min(sizeof(random_store), plen));
5120                         if (phdr == NULL)
5121                                 return (-26);
5122                         p_random = (struct sctp_auth_random *)phdr;
5123                         random_len = plen - sizeof(*p_random);
5124                         /* enforce the random length */
5125                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5126                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5127                                 return (-27);
5128                         }
5129                         got_random = 1;
5130                 } else if (ptype == SCTP_HMAC_LIST) {
5131                         int num_hmacs;
5132                         int i;
5133
5134                         if (plen > sizeof(hmacs_store))
5135                                 break;
5136                         if (got_hmacs) {
5137                                 /* already processed a HMAC list */
5138                                 goto next_param;
5139                         }
5140                         phdr = sctp_get_next_param(m, offset,
5141                             (struct sctp_paramhdr *)hmacs_store,
5142                             min(plen, sizeof(hmacs_store)));
5143                         if (phdr == NULL)
5144                                 return (-28);
5145                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
5146                         hmacs_len = plen - sizeof(*hmacs);
5147                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5148                         /* validate the hmac list */
5149                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5150                                 return (-29);
5151                         }
5152                         if (stcb->asoc.peer_hmacs != NULL)
5153                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5154                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5155                         if (stcb->asoc.peer_hmacs != NULL) {
5156                                 for (i = 0; i < num_hmacs; i++) {
5157                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5158                                             ntohs(hmacs->hmac_ids[i]));
5159                                 }
5160                         }
5161                         got_hmacs = 1;
5162                 } else if (ptype == SCTP_CHUNK_LIST) {
5163                         int i;
5164
5165                         if (plen > sizeof(chunks_store))
5166                                 break;
5167                         if (got_chklist) {
5168                                 /* already processed a Chunks list */
5169                                 goto next_param;
5170                         }
5171                         phdr = sctp_get_next_param(m, offset,
5172                             (struct sctp_paramhdr *)chunks_store,
5173                             min(plen, sizeof(chunks_store)));
5174                         if (phdr == NULL)
5175                                 return (-30);
5176                         chunks = (struct sctp_auth_chunk_list *)phdr;
5177                         num_chunks = plen - sizeof(*chunks);
5178                         if (stcb->asoc.peer_auth_chunks != NULL)
5179                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5180                         else
5181                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5182                         for (i = 0; i < num_chunks; i++) {
5183                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5184                                     stcb->asoc.peer_auth_chunks);
5185                         }
5186                         got_chklist = 1;
5187                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5188                             (ptype == SCTP_STATE_COOKIE) ||
5189                             (ptype == SCTP_UNRECOG_PARAM) ||
5190                             (ptype == SCTP_COOKIE_PRESERVE) ||
5191                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5192                             (ptype == SCTP_ADD_IP_ADDRESS) ||
5193                             (ptype == SCTP_DEL_IP_ADDRESS) ||
5194                             (ptype == SCTP_ERROR_CAUSE_IND) ||
5195                     (ptype == SCTP_SUCCESS_REPORT)) {
5196                          /* don't care */ ;
5197                 } else {
5198                         if ((ptype & 0x8000) == 0x0000) {
5199                                 /*
5200                                  * must stop processing the rest of the
5201                                  * param's. Any report bits were handled
5202                                  * with the call to
5203                                  * sctp_arethere_unrecognized_parameters()
5204                                  * when the INIT or INIT-ACK was first seen.
5205                                  */
5206                                 break;
5207                         }
5208                 }
5209 next_param:
5210                 offset += SCTP_SIZE32(plen);
5211                 if (offset >= limit) {
5212                         break;
5213                 }
5214                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5215                     sizeof(parm_buf));
5216         }
5217         /* Now check to see if we need to purge any addresses */
5218         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5219                 net_tmp = TAILQ_NEXT(net, sctp_next);
5220                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5221                     SCTP_ADDR_NOT_IN_ASSOC) {
5222                         /* This address has been removed from the asoc */
5223                         /* remove and free it */
5224                         stcb->asoc.numnets--;
5225                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5226                         sctp_free_remote_addr(net);
5227                         if (net == stcb->asoc.primary_destination) {
5228                                 stcb->asoc.primary_destination = NULL;
5229                                 sctp_select_primary_destination(stcb);
5230                         }
5231                 }
5232         }
5233         /* validate authentication required parameters */
5234         if (got_random && got_hmacs) {
5235                 stcb->asoc.peer_supports_auth = 1;
5236         } else {
5237                 stcb->asoc.peer_supports_auth = 0;
5238         }
5239         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5240                 /* peer does not support auth but sent a chunks list? */
5241                 return (-31);
5242         }
5243         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5244             !stcb->asoc.peer_supports_auth) {
5245                 /* peer supports asconf but not auth? */
5246                 return (-32);
5247         }
5248         /* concatenate the full random key */
5249 #ifdef SCTP_AUTH_DRAFT_04
5250         keylen = random_len;
5251         new_key = sctp_alloc_key(keylen);
5252         if (new_key != NULL) {
5253                 /* copy in the RANDOM */
5254                 if (p_random != NULL)
5255                         bcopy(p_random->random_data, new_key->key, random_len);
5256         }
5257 #else
5258         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5259             sizeof(*hmacs) + hmacs_len;
5260         new_key = sctp_alloc_key(keylen);
5261         if (new_key != NULL) {
5262                 /* copy in the RANDOM */
5263                 if (p_random != NULL) {
5264                         keylen = sizeof(*p_random) + random_len;
5265                         bcopy(p_random, new_key->key, keylen);
5266                 }
5267                 /* append in the AUTH chunks */
5268                 if (chunks != NULL) {
5269                         bcopy(chunks, new_key->key + keylen,
5270                             sizeof(*chunks) + num_chunks);
5271                         keylen += sizeof(*chunks) + num_chunks;
5272                 }
5273                 /* append in the HMACs */
5274                 if (hmacs != NULL) {
5275                         bcopy(hmacs, new_key->key + keylen,
5276                             sizeof(*hmacs) + hmacs_len);
5277                 }
5278         }
5279 #endif
5280         else {
5281                 /* failed to get memory for the key */
5282                 return (-33);
5283         }
5284         if (stcb->asoc.authinfo.peer_random != NULL)
5285                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5286         stcb->asoc.authinfo.peer_random = new_key;
5287 #ifdef SCTP_AUTH_DRAFT_04
5288         /* don't include the chunks and hmacs for draft -04 */
5289         stcb->asoc.authinfo.peer_random->keylen = random_len;
5290 #endif
5291         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5292         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5293
5294         return (0);
5295 }
5296
5297 int
5298 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5299     struct sctp_nets *net)
5300 {
5301         /* make sure the requested primary address exists in the assoc */
5302         if (net == NULL && sa)
5303                 net = sctp_findnet(stcb, sa);
5304
5305         if (net == NULL) {
5306                 /* didn't find the requested primary address! */
5307                 return (-1);
5308         } else {
5309                 /* set the primary address */
5310                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5311                         /* Must be confirmed, so queue to set */
5312                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5313                         return (0);
5314                 }
5315                 stcb->asoc.primary_destination = net;
5316                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5317                 net = TAILQ_FIRST(&stcb->asoc.nets);
5318                 if (net != stcb->asoc.primary_destination) {
5319                         /*
5320                          * first one on the list is NOT the primary
5321                          * sctp_cmpaddr() is much more efficent if the
5322                          * primary is the first on the list, make it so.
5323                          */
5324                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5325                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5326                 }
5327                 return (0);
5328         }
5329 }
5330
5331
5332 int
5333 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
5334 {
5335         /*
5336          * This function serves two purposes. It will see if a TAG can be
5337          * re-used and return 1 for yes it is ok and 0 for don't use that
5338          * tag. A secondary function it will do is purge out old tags that
5339          * can be removed.
5340          */
5341         struct sctpasochead *head;
5342         struct sctpvtaghead *chain;
5343         struct sctp_tagblock *twait_block;
5344         struct sctp_tcb *stcb;
5345         int i;
5346
5347         SCTP_INP_INFO_WLOCK();
5348         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5349         /* First is the vtag in use ? */
5350
5351         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5352             sctppcbinfo.hashasocmark)];
5353         if (head == NULL) {
5354                 goto check_restart;
5355         }
5356         LIST_FOREACH(stcb, head, sctp_asocs) {
5357
5358                 if (stcb->asoc.my_vtag == tag) {
5359                         /*
5360                          * We should remove this if and return 0 always if
5361                          * we want vtags unique across all endpoints. For
5362                          * now within a endpoint is ok.
5363                          */
5364                         if (inp == stcb->sctp_ep) {
5365                                 /* bad tag, in use */
5366                                 SCTP_INP_INFO_WUNLOCK();
5367                                 return (0);
5368                         }
5369                 }
5370         }
5371 check_restart:
5372         /* Now lets check the restart hash */
5373         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5374             sctppcbinfo.hashrestartmark)];
5375         if (head == NULL) {
5376                 goto check_time_wait;
5377         }
5378         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5379                 if (stcb->asoc.assoc_id == tag) {
5380                         /* candidate */
5381                         if (inp == stcb->sctp_ep) {
5382                                 /* bad tag, in use */
5383                                 SCTP_INP_INFO_WUNLOCK();
5384                                 return (0);
5385                         }
5386                 }
5387         }
5388 check_time_wait:
5389         /* Now what about timed wait ? */
5390         if (!SCTP_LIST_EMPTY(chain)) {
5391                 /*
5392                  * Block(s) are present, lets see if we have this tag in the
5393                  * list
5394                  */
5395                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5396                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5397                                 if (twait_block->vtag_block[i].v_tag == 0) {
5398                                         /* not used */
5399                                         continue;
5400                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
5401                                     now->tv_sec) {
5402                                         /* Audit expires this guy */
5403                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
5404                                         twait_block->vtag_block[i].v_tag = 0;
5405                                 } else if (twait_block->vtag_block[i].v_tag ==
5406                                     tag) {
5407                                         /* Bad tag, sorry :< */
5408                                         SCTP_INP_INFO_WUNLOCK();
5409                                         return (0);
5410                                 }
5411                         }
5412                 }
5413         }
5414         /* Not found, ok to use the tag */
5415         SCTP_INP_INFO_WUNLOCK();
5416         return (1);
5417 }
5418
5419
5420 static sctp_assoc_t reneged_asoc_ids[256];
5421 static uint8_t reneged_at = 0;
5422
5423
5424 static void
5425 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5426 {
5427         /*
5428          * We must hunt this association for MBUF's past the cumack (i.e.
5429          * out of order data that we can renege on).
5430          */
5431         struct sctp_association *asoc;
5432         struct sctp_tmit_chunk *chk, *nchk;
5433         uint32_t cumulative_tsn_p1, tsn;
5434         struct sctp_queued_to_read *ctl, *nctl;
5435         int cnt, strmat, gap;
5436
5437         /* We look for anything larger than the cum-ack + 1 */
5438
5439         SCTP_STAT_INCR(sctps_protocol_drain_calls);
5440         if (sctp_do_drain == 0) {
5441                 return;
5442         }
5443         asoc = &stcb->asoc;
5444         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5445                 /* none we can reneg on. */
5446                 return;
5447         }
5448         SCTP_STAT_INCR(sctps_protocol_drains_done);
5449         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5450         cnt = 0;
5451         /* First look in the re-assembly queue */
5452         chk = TAILQ_FIRST(&asoc->reasmqueue);
5453         while (chk) {
5454                 /* Get the next one */
5455                 nchk = TAILQ_NEXT(chk, sctp_next);
5456                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5457                     cumulative_tsn_p1, MAX_TSN)) {
5458                         /* Yep it is above cum-ack */
5459                         cnt++;
5460                         tsn = chk->rec.data.TSN_seq;
5461                         if (tsn >= asoc->mapping_array_base_tsn) {
5462                                 gap = tsn - asoc->mapping_array_base_tsn;
5463                         } else {
5464                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5465                                     tsn + 1;
5466                         }
5467                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5468                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5469                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5470                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5471                         if (chk->data) {
5472                                 sctp_m_freem(chk->data);
5473                                 chk->data = NULL;
5474                         }
5475                         sctp_free_a_chunk(stcb, chk);
5476                 }
5477                 chk = nchk;
5478         }
5479         /* Ok that was fun, now we will drain all the inbound streams? */
5480         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5481                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5482                 while (ctl) {
5483                         nctl = TAILQ_NEXT(ctl, next);
5484                         if (compare_with_wrap(ctl->sinfo_tsn,
5485                             cumulative_tsn_p1, MAX_TSN)) {
5486                                 /* Yep it is above cum-ack */
5487                                 cnt++;
5488                                 tsn = ctl->sinfo_tsn;
5489                                 if (tsn >= asoc->mapping_array_base_tsn) {
5490                                         gap = tsn -
5491                                             asoc->mapping_array_base_tsn;
5492                                 } else {
5493                                         gap = (MAX_TSN -
5494                                             asoc->mapping_array_base_tsn) +
5495                                             tsn + 1;
5496                                 }
5497                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5498                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5499
5500                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5501                                     gap);
5502                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5503                                     ctl, next);
5504                                 if (ctl->data) {
5505                                         sctp_m_freem(ctl->data);
5506                                         ctl->data = NULL;
5507                                 }
5508                                 sctp_free_remote_addr(ctl->whoFrom);
5509                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5510                                 SCTP_DECR_READQ_COUNT();
5511                         }
5512                         ctl = nctl;
5513                 }
5514         }
5515         /*
5516          * Question, should we go through the delivery queue? The only
5517          * reason things are on here is the app not reading OR a p-d-api up.
5518          * An attacker COULD send enough in to initiate the PD-API and then
5519          * send a bunch of stuff to other streams... these would wind up on
5520          * the delivery queue.. and then we would not get to them. But in
5521          * order to do this I then have to back-track and un-deliver
5522          * sequence numbers in streams.. el-yucko. I think for now we will
5523          * NOT look at the delivery queue and leave it to be something to
5524          * consider later. An alternative would be to abort the P-D-API with
5525          * a notification and then deliver the data.... Or another method
5526          * might be to keep track of how many times the situation occurs and
5527          * if we see a possible attack underway just abort the association.
5528          */
5529 #ifdef SCTP_DEBUG
5530         if (cnt) {
5531                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
5532         }
5533 #endif
5534         if (cnt) {
5535                 /*
5536                  * Now do we need to find a new
5537                  * asoc->highest_tsn_inside_map?
5538                  */
5539                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
5540                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
5541                 } else {
5542                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5543                             asoc->highest_tsn_inside_map + 1;
5544                 }
5545                 if (gap >= (asoc->mapping_array_size << 3)) {
5546                         /*
5547                          * Something bad happened or cum-ack and high were
5548                          * behind the base, but if so earlier checks should
5549                          * have found NO data... wierd... we will start at
5550                          * end of mapping array.
5551                          */
5552                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
5553                             (int)gap,
5554                             (int)(asoc->mapping_array_size << 3),
5555                             (int)asoc->highest_tsn_inside_map);
5556                         gap = asoc->mapping_array_size << 3;
5557                 }
5558                 while (gap > 0) {
5559                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
5560                                 /* found the new highest */
5561                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
5562                                 break;
5563                         }
5564                         gap--;
5565                 }
5566                 if (gap == 0) {
5567                         /* Nothing left in map */
5568                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
5569                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
5570                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
5571                 }
5572                 asoc->last_revoke_count = cnt;
5573                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
5574                 sctp_send_sack(stcb);
5575                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN);
5576                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
5577                 reneged_at++;
5578         }
5579         /*
5580          * Another issue, in un-setting the TSN's in the mapping array we
5581          * DID NOT adjust the higest_tsn marker.  This will cause one of two
5582          * things to occur. It may cause us to do extra work in checking for
5583          * our mapping array movement. More importantly it may cause us to
5584          * SACK every datagram. This may not be a bad thing though since we
5585          * will recover once we get our cum-ack above and all this stuff we
5586          * dumped recovered.
5587          */
5588 }
5589
5590 void
5591 sctp_drain()
5592 {
5593         /*
5594          * We must walk the PCB lists for ALL associations here. The system
5595          * is LOW on MBUF's and needs help. This is where reneging will
5596          * occur. We really hope this does NOT happen!
5597          */
5598         struct sctp_inpcb *inp;
5599         struct sctp_tcb *stcb;
5600
5601         SCTP_INP_INFO_RLOCK();
5602         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
5603                 /* For each endpoint */
5604                 SCTP_INP_RLOCK(inp);
5605                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5606                         /* For each association */
5607                         SCTP_TCB_LOCK(stcb);
5608                         sctp_drain_mbufs(inp, stcb);
5609                         SCTP_TCB_UNLOCK(stcb);
5610                 }
5611                 SCTP_INP_RUNLOCK(inp);
5612         }
5613         SCTP_INP_INFO_RUNLOCK();
5614 }
5615
5616 /*
5617  * start a new iterator
5618  * iterates through all endpoints and associations based on the pcb_state
5619  * flags and asoc_state.  "af" (mandatory) is executed for all matching
5620  * assocs and "ef" (optional) is executed when the iterator completes.
5621  * "inpf" (optional) is executed for each new endpoint as it is being
5622  * iterated through. inpe (optional) is called when the inp completes
5623  * its way through all the stcbs.
5624  */
5625 int
5626 sctp_initiate_iterator(inp_func inpf,
5627     asoc_func af,
5628     inp_func inpe,
5629     uint32_t pcb_state,
5630     uint32_t pcb_features,
5631     uint32_t asoc_state,
5632     void *argp,
5633     uint32_t argi,
5634     end_func ef,
5635     struct sctp_inpcb *s_inp,
5636     uint8_t chunk_output_off)
5637 {
5638         struct sctp_iterator *it = NULL;
5639
5640         if (af == NULL) {
5641                 return (-1);
5642         }
5643         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
5644             SCTP_M_ITER);
5645         if (it == NULL) {
5646                 return (ENOMEM);
5647         }
5648         memset(it, 0, sizeof(*it));
5649         it->function_assoc = af;
5650         it->function_inp = inpf;
5651         if (inpf)
5652                 it->done_current_ep = 0;
5653         else
5654                 it->done_current_ep = 1;
5655         it->function_atend = ef;
5656         it->pointer = argp;
5657         it->val = argi;
5658         it->pcb_flags = pcb_state;
5659         it->pcb_features = pcb_features;
5660         it->asoc_state = asoc_state;
5661         it->function_inp_end = inpe;
5662         it->no_chunk_output = chunk_output_off;
5663         if (s_inp) {
5664                 it->inp = s_inp;
5665                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5666         } else {
5667                 SCTP_INP_INFO_RLOCK();
5668                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5669
5670                 SCTP_INP_INFO_RUNLOCK();
5671                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5672
5673         }
5674         SCTP_IPI_ITERATOR_WQ_LOCK();
5675         if (it->inp) {
5676                 SCTP_INP_INCR_REF(it->inp);
5677         }
5678         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5679 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5680         if (sctppcbinfo.iterator_running == 0) {
5681                 sctp_wakeup_iterator();
5682         }
5683         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5684 #else
5685         if (it->inp)
5686                 SCTP_INP_DECR_REF(it->inp);
5687         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5688         /* Init the timer */
5689         SCTP_OS_TIMER_INIT(&it->tmr.timer);
5690         /* add to the list of all iterators */
5691         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
5692             NULL, NULL);
5693 #endif
5694         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
5695         return (0);
5696 }