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         if ((sctp_default_cc_module >= SCTP_CC_RFC2581) &&
1915             (sctp_default_cc_module <= SCTP_CC_HTCP)) {
1916                 m->sctp_default_cc_module = sctp_default_cc_module;
1917         } else {
1918                 /* sysctl done with invalid value, set to 2581 */
1919                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
1920         }
1921         /* number of streams to pre-open on a association */
1922         m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
1923
1924         /* Add adaptation cookie */
1925         m->adaptation_layer_indicator = 0x504C5253;
1926
1927         /* seed random number generator */
1928         m->random_counter = 1;
1929         m->store_at = SCTP_SIGNATURE_SIZE;
1930         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
1931         sctp_fill_random_store(m);
1932
1933         /* Minimum cookie size */
1934         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
1935             sizeof(struct sctp_state_cookie);
1936         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
1937
1938         /* Setup the initial secret */
1939         (void)SCTP_GETTIME_TIMEVAL(&time);
1940         m->time_of_secret_change = time.tv_sec;
1941
1942         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
1943                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
1944         }
1945         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
1946
1947         /* How long is a cookie good for ? */
1948         m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default);
1949         /*
1950          * Initialize authentication parameters
1951          */
1952         m->local_hmacs = sctp_default_supported_hmaclist();
1953         m->local_auth_chunks = sctp_alloc_chunklist();
1954         sctp_auth_set_default_chunks(m->local_auth_chunks);
1955         LIST_INIT(&m->shared_keys);
1956         /* add default NULL key as key id 0 */
1957         null_key = sctp_alloc_sharedkey();
1958         sctp_insert_sharedkey(&m->shared_keys, null_key);
1959         SCTP_INP_WUNLOCK(inp);
1960 #ifdef SCTP_LOG_CLOSING
1961         sctp_log_closing(inp, NULL, 12);
1962 #endif
1963         return (error);
1964 }
1965
1966
1967 void
1968 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
1969     struct sctp_tcb *stcb)
1970 {
1971         struct sctp_nets *net;
1972         uint16_t lport, rport;
1973         struct sctppcbhead *head;
1974         struct sctp_laddr *laddr, *oladdr;
1975
1976         SCTP_TCB_UNLOCK(stcb);
1977         SCTP_INP_INFO_WLOCK();
1978         SCTP_INP_WLOCK(old_inp);
1979         SCTP_INP_WLOCK(new_inp);
1980         SCTP_TCB_LOCK(stcb);
1981
1982         new_inp->sctp_ep.time_of_secret_change =
1983             old_inp->sctp_ep.time_of_secret_change;
1984         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
1985             sizeof(old_inp->sctp_ep.secret_key));
1986         new_inp->sctp_ep.current_secret_number =
1987             old_inp->sctp_ep.current_secret_number;
1988         new_inp->sctp_ep.last_secret_number =
1989             old_inp->sctp_ep.last_secret_number;
1990         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
1991
1992         /* make it so new data pours into the new socket */
1993         stcb->sctp_socket = new_inp->sctp_socket;
1994         stcb->sctp_ep = new_inp;
1995
1996         /* Copy the port across */
1997         lport = new_inp->sctp_lport = old_inp->sctp_lport;
1998         rport = stcb->rport;
1999         /* Pull the tcb from the old association */
2000         LIST_REMOVE(stcb, sctp_tcbhash);
2001         LIST_REMOVE(stcb, sctp_tcblist);
2002
2003         /* Now insert the new_inp into the TCP connected hash */
2004         head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
2005             sctppcbinfo.hashtcpmark)];
2006
2007         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2008         /* Its safe to access */
2009         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2010
2011         /* Now move the tcb into the endpoint list */
2012         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2013         /*
2014          * Question, do we even need to worry about the ep-hash since we
2015          * only have one connection? Probably not :> so lets get rid of it
2016          * and not suck up any kernel memory in that.
2017          */
2018
2019         /* Ok. Let's restart timer. */
2020         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2021                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2022                     stcb, net);
2023         }
2024
2025         SCTP_INP_INFO_WUNLOCK();
2026         if (new_inp->sctp_tcbhash != NULL) {
2027                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2028                 new_inp->sctp_tcbhash = NULL;
2029         }
2030         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2031                 /* Subset bound, so copy in the laddr list from the old_inp */
2032                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2033                         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
2034                         if (laddr == NULL) {
2035                                 /*
2036                                  * Gak, what can we do? This assoc is really
2037                                  * HOSED. We probably should send an abort
2038                                  * here.
2039                                  */
2040                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2041                                 continue;
2042                         }
2043                         SCTP_INCR_LADDR_COUNT();
2044                         bzero(laddr, sizeof(*laddr));
2045                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2046                         laddr->ifa = oladdr->ifa;
2047                         atomic_add_int(&laddr->ifa->refcount, 1);
2048                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2049                             sctp_nxt_addr);
2050                         new_inp->laddr_count++;
2051                 }
2052         }
2053         /*
2054          * Now any running timers need to be adjusted since we really don't
2055          * care if they are running or not just blast in the new_inp into
2056          * all of them.
2057          */
2058
2059         stcb->asoc.hb_timer.ep = (void *)new_inp;
2060         stcb->asoc.dack_timer.ep = (void *)new_inp;
2061         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2062         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2063         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2064         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2065         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2066         /* now what about the nets? */
2067         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2068                 net->pmtu_timer.ep = (void *)new_inp;
2069                 net->rxt_timer.ep = (void *)new_inp;
2070                 net->fr_timer.ep = (void *)new_inp;
2071         }
2072         SCTP_INP_WUNLOCK(new_inp);
2073         SCTP_INP_WUNLOCK(old_inp);
2074 }
2075
2076 static int
2077 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
2078 {
2079         struct sctppcbhead *head;
2080         struct sctp_inpcb *t_inp;
2081         int fnd;
2082
2083         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2084             sctppcbinfo.hashmark)];
2085         LIST_FOREACH(t_inp, head, sctp_hash) {
2086                 if (t_inp->sctp_lport != lport) {
2087                         continue;
2088                 }
2089                 /* is it in the VRF in question */
2090                 fnd = 0;
2091                 if (t_inp->def_vrf_id == vrf_id)
2092                         fnd = 1;
2093                 if (!fnd)
2094                         continue;
2095
2096                 /* This one is in use. */
2097                 /* check the v6/v4 binding issue */
2098                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2099                     SCTP_IPV6_V6ONLY(t_inp)) {
2100                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2101                                 /* collision in V6 space */
2102                                 return (1);
2103                         } else {
2104                                 /* inp is BOUND_V4 no conflict */
2105                                 continue;
2106                         }
2107                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
2108                         /* t_inp is bound v4 and v6, conflict always */
2109                         return (1);
2110                 } else {
2111                         /* t_inp is bound only V4 */
2112                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
2113                             SCTP_IPV6_V6ONLY(inp)) {
2114                                 /* no conflict */
2115                                 continue;
2116                         }
2117                         /* else fall through to conflict */
2118                 }
2119                 return (1);
2120         }
2121         return (0);
2122 }
2123
2124
2125
2126 int
2127 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2128     struct thread *p)
2129 {
2130         /* bind a ep to a socket address */
2131         struct sctppcbhead *head;
2132         struct sctp_inpcb *inp, *inp_tmp;
2133         struct inpcb *ip_inp;
2134         int bindall;
2135         int prison = 0;
2136         uint16_t lport;
2137         int error;
2138         uint32_t vrf_id;
2139
2140         lport = 0;
2141         error = 0;
2142         bindall = 1;
2143         inp = (struct sctp_inpcb *)so->so_pcb;
2144         ip_inp = (struct inpcb *)so->so_pcb;
2145 #ifdef SCTP_DEBUG
2146         if (addr) {
2147                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2148                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2149                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2150                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2151         }
2152 #endif
2153         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2154                 /* already did a bind, subsequent binds NOT allowed ! */
2155                 return (EINVAL);
2156         }
2157 #ifdef INVARIANTS
2158         if (p == NULL)
2159                 panic("null proc/thread");
2160 #endif
2161         if (p && jailed(p->td_ucred)) {
2162                 prison = 1;
2163         }
2164         if (addr != NULL) {
2165                 if (addr->sa_family == AF_INET) {
2166                         struct sockaddr_in *sin;
2167
2168                         /* IPV6_V6ONLY socket? */
2169                         if (SCTP_IPV6_V6ONLY(ip_inp)) {
2170                                 return (EINVAL);
2171                         }
2172                         if (addr->sa_len != sizeof(*sin))
2173                                 return (EINVAL);
2174
2175                         sin = (struct sockaddr_in *)addr;
2176                         lport = sin->sin_port;
2177                         if (prison) {
2178                                 /*
2179                                  * For INADDR_ANY and  LOOPBACK the
2180                                  * prison_ip() call will tranmute the ip
2181                                  * address to the proper valie.
2182                                  */
2183                                 if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr))
2184                                         return (EINVAL);
2185                         }
2186                         if (sin->sin_addr.s_addr != INADDR_ANY) {
2187                                 bindall = 0;
2188                         }
2189                 } else if (addr->sa_family == AF_INET6) {
2190                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2191                         struct sockaddr_in6 *sin6;
2192
2193                         sin6 = (struct sockaddr_in6 *)addr;
2194
2195                         if (addr->sa_len != sizeof(*sin6))
2196                                 return (EINVAL);
2197
2198                         lport = sin6->sin6_port;
2199                         /*
2200                          * Jail checks for IPv6 should go HERE! i.e. add the
2201                          * prison_ip() equivilant in this postion to
2202                          * transmute the addresses to the proper one jailed.
2203                          */
2204                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2205                                 bindall = 0;
2206                                 /* KAME hack: embed scopeid */
2207                                 if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
2208                                         return (EINVAL);
2209                         }
2210                         /* this must be cleared for ifa_ifwithaddr() */
2211                         sin6->sin6_scope_id = 0;
2212                 } else {
2213                         return (EAFNOSUPPORT);
2214                 }
2215         }
2216         /* Setup a vrf_id to be the default for the non-bind-all case. */
2217         vrf_id = inp->def_vrf_id;
2218
2219         SCTP_INP_INFO_WLOCK();
2220         SCTP_INP_WLOCK(inp);
2221         /* increase our count due to the unlock we do */
2222         SCTP_INP_INCR_REF(inp);
2223         if (lport) {
2224                 /*
2225                  * Did the caller specify a port? if so we must see if a ep
2226                  * already has this one bound.
2227                  */
2228                 /* got to be root to get at low ports */
2229                 if (ntohs(lport) < IPPORT_RESERVED) {
2230                         if (p && (error =
2231                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2232                             )) {
2233                                 SCTP_INP_DECR_REF(inp);
2234                                 SCTP_INP_WUNLOCK(inp);
2235                                 SCTP_INP_INFO_WUNLOCK();
2236                                 return (error);
2237                         }
2238                 }
2239                 if (p == NULL) {
2240                         SCTP_INP_DECR_REF(inp);
2241                         SCTP_INP_WUNLOCK(inp);
2242                         SCTP_INP_INFO_WUNLOCK();
2243                         return (error);
2244                 }
2245                 SCTP_INP_WUNLOCK(inp);
2246                 if (bindall) {
2247                         vrf_id = inp->def_vrf_id;
2248                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2249                         if (inp_tmp != NULL) {
2250                                 /*
2251                                  * lock guy returned and lower count note
2252                                  * that we are not bound so inp_tmp should
2253                                  * NEVER be inp. And it is this inp
2254                                  * (inp_tmp) that gets the reference bump,
2255                                  * so we must lower it.
2256                                  */
2257                                 SCTP_INP_DECR_REF(inp_tmp);
2258                                 SCTP_INP_DECR_REF(inp);
2259                                 /* unlock info */
2260                                 SCTP_INP_INFO_WUNLOCK();
2261                                 return (EADDRINUSE);
2262                         }
2263                 } else {
2264                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2265                         if (inp_tmp != NULL) {
2266                                 /*
2267                                  * lock guy returned and lower count note
2268                                  * that we are not bound so inp_tmp should
2269                                  * NEVER be inp. And it is this inp
2270                                  * (inp_tmp) that gets the reference bump,
2271                                  * so we must lower it.
2272                                  */
2273                                 SCTP_INP_DECR_REF(inp_tmp);
2274                                 SCTP_INP_DECR_REF(inp);
2275                                 /* unlock info */
2276                                 SCTP_INP_INFO_WUNLOCK();
2277                                 return (EADDRINUSE);
2278                         }
2279                 }
2280                 SCTP_INP_WLOCK(inp);
2281                 if (bindall) {
2282                         /* verify that no lport is not used by a singleton */
2283                         if (sctp_isport_inuse(inp, lport, vrf_id)) {
2284                                 /* Sorry someone already has this one bound */
2285                                 SCTP_INP_DECR_REF(inp);
2286                                 SCTP_INP_WUNLOCK(inp);
2287                                 SCTP_INP_INFO_WUNLOCK();
2288                                 return (EADDRINUSE);
2289                         }
2290                 }
2291         } else {
2292                 uint16_t first, last, candidate;
2293                 uint16_t count;
2294                 int done;
2295
2296                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2297                         first = ipport_hifirstauto;
2298                         last = ipport_hilastauto;
2299                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2300                         if (p && (error =
2301                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2302                             )) {
2303                                 SCTP_INP_DECR_REF(inp);
2304                                 SCTP_INP_WUNLOCK(inp);
2305                                 SCTP_INP_INFO_WUNLOCK();
2306                                 return (error);
2307                         }
2308                         first = ipport_lowfirstauto;
2309                         last = ipport_lowlastauto;
2310                 } else {
2311                         first = ipport_firstauto;
2312                         last = ipport_lastauto;
2313                 }
2314                 if (first > last) {
2315                         uint16_t temp;
2316
2317                         temp = first;
2318                         first = last;
2319                         last = temp;
2320                 }
2321                 count = last - first + 1;       /* number of candidates */
2322                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2323
2324                 done = 0;
2325                 while (!done) {
2326                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2327                                 done = 1;
2328                         }
2329                         if (!done) {
2330                                 if (--count == 0) {
2331                                         SCTP_INP_DECR_REF(inp);
2332                                         SCTP_INP_WUNLOCK(inp);
2333                                         SCTP_INP_INFO_WUNLOCK();
2334                                         return (EADDRINUSE);
2335                                 }
2336                                 if (candidate == last)
2337                                         candidate = first;
2338                                 else
2339                                         candidate = candidate + 1;
2340                         }
2341                 }
2342                 lport = htons(candidate);
2343         }
2344         SCTP_INP_DECR_REF(inp);
2345         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2346             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2347                 /*
2348                  * this really should not happen. The guy did a non-blocking
2349                  * bind and then did a close at the same time.
2350                  */
2351                 SCTP_INP_WUNLOCK(inp);
2352                 SCTP_INP_INFO_WUNLOCK();
2353                 return (EINVAL);
2354         }
2355         /* ok we look clear to give out this port, so lets setup the binding */
2356         if (bindall) {
2357                 /* binding to all addresses, so just set in the proper flags */
2358                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2359                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2360                 /* set the automatic addr changes from kernel flag */
2361                 if (sctp_auto_asconf == 0) {
2362                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2363                 } else {
2364                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2365                 }
2366         } else {
2367                 /*
2368                  * bind specific, make sure flags is off and add a new
2369                  * address structure to the sctp_addr_list inside the ep
2370                  * structure.
2371                  *
2372                  * We will need to allocate one and insert it at the head. The
2373                  * socketopt call can just insert new addresses in there as
2374                  * well. It will also have to do the embed scope kame hack
2375                  * too (before adding).
2376                  */
2377                 struct sctp_ifa *ifa;
2378                 struct sockaddr_storage store_sa;
2379
2380                 memset(&store_sa, 0, sizeof(store_sa));
2381                 if (addr->sa_family == AF_INET) {
2382                         struct sockaddr_in *sin;
2383
2384                         sin = (struct sockaddr_in *)&store_sa;
2385                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2386                         sin->sin_port = 0;
2387                 } else if (addr->sa_family == AF_INET6) {
2388                         struct sockaddr_in6 *sin6;
2389
2390                         sin6 = (struct sockaddr_in6 *)&store_sa;
2391                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2392                         sin6->sin6_port = 0;
2393                 }
2394                 /*
2395                  * first find the interface with the bound address need to
2396                  * zero out the port to find the address! yuck! can't do
2397                  * this earlier since need port for sctp_pcb_findep()
2398                  */
2399                 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2400                     vrf_id, 0);
2401                 if (ifa == NULL) {
2402                         /* Can't find an interface with that address */
2403                         SCTP_INP_WUNLOCK(inp);
2404                         SCTP_INP_INFO_WUNLOCK();
2405                         return (EADDRNOTAVAIL);
2406                 }
2407                 if (addr->sa_family == AF_INET6) {
2408                         /* GAK, more FIXME IFA lock? */
2409                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2410                                 /* Can't bind a non-existent addr. */
2411                                 SCTP_INP_WUNLOCK(inp);
2412                                 SCTP_INP_INFO_WUNLOCK();
2413                                 return (EINVAL);
2414                         }
2415                 }
2416                 /* we're not bound all */
2417                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2418                 /* allow bindx() to send ASCONF's for binding changes */
2419                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2420                 /* clear automatic addr changes from kernel flag */
2421                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2422
2423                 /* add this address to the endpoint list */
2424                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2425                 if (error != 0) {
2426                         SCTP_INP_WUNLOCK(inp);
2427                         SCTP_INP_INFO_WUNLOCK();
2428                         return (error);
2429                 }
2430                 inp->laddr_count++;
2431         }
2432         /* find the bucket */
2433         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2434             sctppcbinfo.hashmark)];
2435         /* put it in the bucket */
2436         LIST_INSERT_HEAD(head, inp, sctp_hash);
2437         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2438             head, ntohs(lport));
2439         /* set in the port */
2440         inp->sctp_lport = lport;
2441
2442         /* turn off just the unbound flag */
2443         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2444         SCTP_INP_WUNLOCK(inp);
2445         SCTP_INP_INFO_WUNLOCK();
2446         return (0);
2447 }
2448
2449
2450 static void
2451 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2452 {
2453         struct sctp_iterator *it;
2454
2455         /*
2456          * We enter with the only the ITERATOR_LOCK in place and a write
2457          * lock on the inp_info stuff.
2458          */
2459
2460         /*
2461          * Go through all iterators, we must do this since it is possible
2462          * that some iterator does NOT have the lock, but is waiting for it.
2463          * And the one that had the lock has either moved in the last
2464          * iteration or we just cleared it above. We need to find all of
2465          * those guys. The list of iterators should never be very big
2466          * though.
2467          */
2468         TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2469                 if (it == inp->inp_starting_point_for_iterator)
2470                         /* skip this guy, he's special */
2471                         continue;
2472                 if (it->inp == inp) {
2473                         /*
2474                          * This is tricky and we DON'T lock the iterator.
2475                          * Reason is he's running but waiting for me since
2476                          * inp->inp_starting_point_for_iterator has the lock
2477                          * on me (the guy above we skipped). This tells us
2478                          * its is not running but waiting for
2479                          * inp->inp_starting_point_for_iterator to be
2480                          * released by the guy that does have our INP in a
2481                          * lock.
2482                          */
2483                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2484                                 it->inp = NULL;
2485                                 it->stcb = NULL;
2486                         } else {
2487                                 /* set him up to do the next guy not me */
2488                                 it->inp = inp_next;
2489                                 it->stcb = NULL;
2490                         }
2491                 }
2492         }
2493         it = inp->inp_starting_point_for_iterator;
2494         if (it) {
2495                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2496                         it->inp = NULL;
2497                 } else {
2498                         it->inp = inp_next;
2499                 }
2500                 it->stcb = NULL;
2501         }
2502 }
2503
2504 /* release sctp_inpcb unbind the port */
2505 void
2506 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2507 {
2508         /*
2509          * Here we free a endpoint. We must find it (if it is in the Hash
2510          * table) and remove it from there. Then we must also find it in the
2511          * overall list and remove it from there. After all removals are
2512          * complete then any timer has to be stopped. Then start the actual
2513          * freeing. a) Any local lists. b) Any associations. c) The hash of
2514          * all associations. d) finally the ep itself.
2515          */
2516         struct sctp_pcb *m;
2517         struct sctp_inpcb *inp_save;
2518         struct sctp_tcb *asoc, *nasoc;
2519         struct sctp_laddr *laddr, *nladdr;
2520         struct inpcb *ip_pcb;
2521         struct socket *so;
2522
2523         struct sctp_queued_to_read *sq;
2524
2525
2526         int cnt;
2527         sctp_sharedkey_t *shared_key;
2528
2529
2530 #ifdef SCTP_LOG_CLOSING
2531         sctp_log_closing(inp, NULL, 0);
2532 #endif
2533
2534         SCTP_ITERATOR_LOCK();
2535         so = inp->sctp_socket;
2536         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2537                 /* been here before.. eeks.. get out of here */
2538                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2539                 SCTP_ITERATOR_UNLOCK();
2540 #ifdef SCTP_LOG_CLOSING
2541                 sctp_log_closing(inp, NULL, 1);
2542 #endif
2543                 return;
2544         }
2545         SCTP_ASOC_CREATE_LOCK(inp);
2546         SCTP_INP_INFO_WLOCK();
2547
2548         SCTP_INP_WLOCK(inp);
2549         /* First time through we have the socket lock, after that no more. */
2550         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2551                 /*
2552                  * Once we are in we can remove the flag from = 1 is only
2553                  * passed from the actual closing routines that are called
2554                  * via the sockets layer.
2555                  */
2556                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2557         }
2558         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2559             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2560
2561         if (inp->control) {
2562                 sctp_m_freem(inp->control);
2563                 inp->control = NULL;
2564         }
2565         if (inp->pkt) {
2566                 sctp_m_freem(inp->pkt);
2567                 inp->pkt = NULL;
2568         }
2569         m = &inp->sctp_ep;
2570         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
2571                                          * here but I will be nice :> (i.e.
2572                                          * ip_pcb = ep;) */
2573         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
2574                 int cnt_in_sd;
2575
2576                 cnt_in_sd = 0;
2577                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2578                     asoc = nasoc) {
2579                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2580                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2581                                 /* Skip guys being freed */
2582                                 asoc->sctp_socket = NULL;
2583                                 cnt_in_sd++;
2584                                 continue;
2585                         }
2586                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2587                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2588                                 /*
2589                                  * If we have data in queue, we don't want
2590                                  * to just free since the app may have done,
2591                                  * send()/close or connect/send/close. And
2592                                  * it wants the data to get across first.
2593                                  */
2594                                 if (asoc->asoc.total_output_queue_size == 0) {
2595                                         /*
2596                                          * Just abandon things in the front
2597                                          * states
2598                                          */
2599                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2);
2600                                         continue;
2601                                 }
2602                         }
2603                         SCTP_TCB_LOCK(asoc);
2604                         /* Disconnect the socket please */
2605                         asoc->sctp_socket = NULL;
2606                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2607                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
2608                             (asoc->asoc.control_pdapi) ||
2609                             (asoc->asoc.size_on_all_streams > 0) ||
2610                             (so && (so->so_rcv.sb_cc > 0))
2611                             ) {
2612                                 /* Left with Data unread */
2613                                 struct mbuf *op_err;
2614
2615                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2616                                     0, M_DONTWAIT, 1, MT_DATA);
2617                                 if (op_err) {
2618                                         /* Fill in the user initiated abort */
2619                                         struct sctp_paramhdr *ph;
2620                                         uint32_t *ippp;
2621
2622                                         SCTP_BUF_LEN(op_err) =
2623                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2624                                         ph = mtod(op_err,
2625                                             struct sctp_paramhdr *);
2626                                         ph->param_type = htons(
2627                                             SCTP_CAUSE_USER_INITIATED_ABT);
2628                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
2629                                         ippp = (uint32_t *) (ph + 1);
2630                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2631                                 }
2632                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2633                                 sctp_send_abort_tcb(asoc, op_err);
2634                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2635                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2636                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2637                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2638                                 }
2639                                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4);
2640                                 continue;
2641                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2642                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2643                                     (asoc->asoc.stream_queue_cnt == 0)
2644                             ) {
2645                                 if (asoc->asoc.locked_on_sending) {
2646                                         goto abort_anyway;
2647                                 }
2648                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2649                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2650                                         /*
2651                                          * there is nothing queued to send,
2652                                          * so I send shutdown
2653                                          */
2654                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2655                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2656                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2657                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2658                                         }
2659                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2660                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2661                                             asoc->asoc.primary_destination);
2662                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2663                                             asoc->asoc.primary_destination);
2664                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR);
2665                                 }
2666                         } else {
2667                                 /* mark into shutdown pending */
2668                                 struct sctp_stream_queue_pending *sp;
2669
2670                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2671                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2672                                     asoc->asoc.primary_destination);
2673                                 if (asoc->asoc.locked_on_sending) {
2674                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2675                                             sctp_streamhead);
2676                                         if (sp == NULL) {
2677                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
2678                                                     asoc->asoc.locked_on_sending,
2679                                                     asoc->asoc.locked_on_sending->stream_no);
2680                                         } else {
2681                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2682                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2683                                         }
2684                                 }
2685                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2686                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2687                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2688                                         struct mbuf *op_err;
2689
2690                         abort_anyway:
2691                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2692                                             0, M_DONTWAIT, 1, MT_DATA);
2693                                         if (op_err) {
2694                                                 /*
2695                                                  * Fill in the user
2696                                                  * initiated abort
2697                                                  */
2698                                                 struct sctp_paramhdr *ph;
2699                                                 uint32_t *ippp;
2700
2701                                                 SCTP_BUF_LEN(op_err) =
2702                                                     (sizeof(struct sctp_paramhdr) +
2703                                                     sizeof(uint32_t));
2704                                                 ph = mtod(op_err,
2705                                                     struct sctp_paramhdr *);
2706                                                 ph->param_type = htons(
2707                                                     SCTP_CAUSE_USER_INITIATED_ABT);
2708                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2709                                                 ippp = (uint32_t *) (ph + 1);
2710                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
2711                                         }
2712                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
2713                                         sctp_send_abort_tcb(asoc, op_err);
2714                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2715                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2716                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2717                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2718                                         }
2719                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6);
2720                                         continue;
2721                                 }
2722                         }
2723                         cnt_in_sd++;
2724                         SCTP_TCB_UNLOCK(asoc);
2725                 }
2726                 /* now is there some left in our SHUTDOWN state? */
2727                 if (cnt_in_sd) {
2728                         SCTP_INP_WUNLOCK(inp);
2729                         SCTP_ASOC_CREATE_UNLOCK(inp);
2730                         SCTP_INP_INFO_WUNLOCK();
2731                         SCTP_ITERATOR_UNLOCK();
2732 #ifdef SCTP_LOG_CLOSING
2733                         sctp_log_closing(inp, NULL, 2);
2734 #endif
2735                         return;
2736                 }
2737         }
2738         inp->sctp_socket = NULL;
2739         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2740             SCTP_PCB_FLAGS_UNBOUND) {
2741                 /*
2742                  * ok, this guy has been bound. It's port is somewhere in
2743                  * the sctppcbinfo hash table. Remove it!
2744                  */
2745                 LIST_REMOVE(inp, sctp_hash);
2746                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2747         }
2748         /*
2749          * If there is a timer running to kill us, forget it, since it may
2750          * have a contest on the INP lock.. which would cause us to die ...
2751          */
2752         cnt = 0;
2753         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2754             asoc = nasoc) {
2755                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2756                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2757                         cnt++;
2758                         continue;
2759                 }
2760                 /* Free associations that are NOT killing us */
2761                 SCTP_TCB_LOCK(asoc);
2762                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
2763                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
2764                         struct mbuf *op_err;
2765                         uint32_t *ippp;
2766
2767                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2768                             0, M_DONTWAIT, 1, MT_DATA);
2769                         if (op_err) {
2770                                 /* Fill in the user initiated abort */
2771                                 struct sctp_paramhdr *ph;
2772
2773                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
2774                                     sizeof(uint32_t));
2775                                 ph = mtod(op_err, struct sctp_paramhdr *);
2776                                 ph->param_type = htons(
2777                                     SCTP_CAUSE_USER_INITIATED_ABT);
2778                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2779                                 ippp = (uint32_t *) (ph + 1);
2780                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
2781
2782                         }
2783                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
2784                         sctp_send_abort_tcb(asoc, op_err);
2785                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2786                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2787                         cnt++;
2788                         SCTP_TCB_UNLOCK(asoc);
2789                         continue;
2790                 }
2791                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2792                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2793                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2794                 }
2795                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8);
2796         }
2797         if (cnt) {
2798                 /* Ok we have someone out there that will kill us */
2799                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2800                 SCTP_INP_WUNLOCK(inp);
2801                 SCTP_ASOC_CREATE_UNLOCK(inp);
2802                 SCTP_INP_INFO_WUNLOCK();
2803                 SCTP_ITERATOR_UNLOCK();
2804 #ifdef SCTP_LOG_CLOSING
2805                 sctp_log_closing(inp, NULL, 3);
2806 #endif
2807                 return;
2808         }
2809         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
2810                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2811                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2812                 SCTP_INP_WUNLOCK(inp);
2813                 SCTP_ASOC_CREATE_UNLOCK(inp);
2814                 SCTP_INP_INFO_WUNLOCK();
2815                 SCTP_ITERATOR_UNLOCK();
2816 #ifdef SCTP_LOG_CLOSING
2817                 sctp_log_closing(inp, NULL, 4);
2818 #endif
2819                 return;
2820         }
2821         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2822         inp->sctp_ep.signature_change.type = 0;
2823         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2824
2825 #ifdef SCTP_LOG_CLOSING
2826         sctp_log_closing(inp, NULL, 5);
2827 #endif
2828
2829         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2830         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
2831         /* Clear the read queue */
2832         /* sa_ignore FREED_MEMORY */
2833         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
2834                 /* Its only abandoned if it had data left */
2835                 if (sq->length)
2836                         SCTP_STAT_INCR(sctps_left_abandon);
2837
2838                 TAILQ_REMOVE(&inp->read_queue, sq, next);
2839                 sctp_free_remote_addr(sq->whoFrom);
2840                 if (so)
2841                         so->so_rcv.sb_cc -= sq->length;
2842                 if (sq->data) {
2843                         sctp_m_freem(sq->data);
2844                         sq->data = NULL;
2845                 }
2846                 /*
2847                  * no need to free the net count, since at this point all
2848                  * assoc's are gone.
2849                  */
2850                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2851                 SCTP_DECR_READQ_COUNT();
2852         }
2853         /* Now the sctp_pcb things */
2854         /*
2855          * free each asoc if it is not already closed/free. we can't use the
2856          * macro here since le_next will get freed as part of the
2857          * sctp_free_assoc() call.
2858          */
2859         cnt = 0;
2860         if (so) {
2861 #ifdef IPSEC
2862                 ipsec4_delete_pcbpolicy(ip_pcb);
2863 #endif                          /* IPSEC */
2864
2865                 /* Unlocks not needed since the socket is gone now */
2866         }
2867         if (ip_pcb->inp_options) {
2868                 (void)sctp_m_free(ip_pcb->inp_options);
2869                 ip_pcb->inp_options = 0;
2870         }
2871         if (ip_pcb->inp_moptions) {
2872                 inp_freemoptions(ip_pcb->inp_moptions);
2873                 ip_pcb->inp_moptions = 0;
2874         }
2875 #ifdef INET6
2876         if (ip_pcb->inp_vflag & INP_IPV6) {
2877                 struct in6pcb *in6p;
2878
2879                 in6p = (struct in6pcb *)inp;
2880                 ip6_freepcbopts(in6p->in6p_outputopts);
2881         }
2882 #endif                          /* INET6 */
2883         ip_pcb->inp_vflag = 0;
2884         /* free up authentication fields */
2885         if (inp->sctp_ep.local_auth_chunks != NULL)
2886                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2887         if (inp->sctp_ep.local_hmacs != NULL)
2888                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2889
2890         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2891         while (shared_key) {
2892                 LIST_REMOVE(shared_key, next);
2893                 sctp_free_sharedkey(shared_key);
2894                 /* sa_ignore FREED_MEMORY */
2895                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2896         }
2897
2898         inp_save = LIST_NEXT(inp, sctp_list);
2899         LIST_REMOVE(inp, sctp_list);
2900
2901         /* fix any iterators only after out of the list */
2902         sctp_iterator_inp_being_freed(inp, inp_save);
2903         /*
2904          * if we have an address list the following will free the list of
2905          * ifaddr's that are set into this ep. Again macro limitations here,
2906          * since the LIST_FOREACH could be a bad idea.
2907          */
2908         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2909             laddr = nladdr) {
2910                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2911                 sctp_remove_laddr(laddr);
2912         }
2913
2914 #ifdef SCTP_TRACK_FREED_ASOCS
2915         /* TEMP CODE */
2916         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
2917             asoc = nasoc) {
2918                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2919                 LIST_REMOVE(asoc, sctp_tcblist);
2920                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
2921                 SCTP_DECR_ASOC_COUNT();
2922         }
2923         /* *** END TEMP CODE *** */
2924 #endif
2925         /* Now lets see about freeing the EP hash table. */
2926         if (inp->sctp_tcbhash != NULL) {
2927                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2928                 inp->sctp_tcbhash = NULL;
2929         }
2930         /* Now we must put the ep memory back into the zone pool */
2931         INP_LOCK_DESTROY(&inp->ip_inp.inp);
2932         SCTP_INP_LOCK_DESTROY(inp);
2933         SCTP_INP_READ_DESTROY(inp);
2934         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2935         SCTP_INP_INFO_WUNLOCK();
2936
2937         SCTP_ITERATOR_UNLOCK();
2938
2939         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2940         SCTP_DECR_EP_COUNT();
2941
2942 }
2943
2944
2945 struct sctp_nets *
2946 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2947 {
2948         struct sctp_nets *net;
2949
2950         /* locate the address */
2951         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2952                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2953                         return (net);
2954         }
2955         return (NULL);
2956 }
2957
2958
2959 int
2960 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
2961 {
2962         struct sctp_ifa *sctp_ifa;
2963
2964         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0);
2965         if (sctp_ifa) {
2966                 return (1);
2967         } else {
2968                 return (0);
2969         }
2970 }
2971
2972 /*
2973  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2974  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2975  * stats of stuff.
2976  */
2977 int
2978 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2979     int set_scope, int from)
2980 {
2981         /*
2982          * The following is redundant to the same lines in the
2983          * sctp_aloc_assoc() but is needed since other's call the add
2984          * address function
2985          */
2986         struct sctp_nets *net, *netfirst;
2987         int addr_inscope;
2988
2989         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
2990             from);
2991         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
2992
2993         netfirst = sctp_findnet(stcb, newaddr);
2994         if (netfirst) {
2995                 /*
2996                  * Lie and return ok, we don't want to make the association
2997                  * go away for this behavior. It will happen in the TCP
2998                  * model in a connected socket. It does not reach the hash
2999                  * table until after the association is built so it can't be
3000                  * found. Mark as reachable, since the initial creation will
3001                  * have been cleared and the NOT_IN_ASSOC flag will have
3002                  * been added... and we don't want to end up removing it
3003                  * back out.
3004                  */
3005                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3006                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3007                             SCTP_ADDR_UNCONFIRMED);
3008                 } else {
3009                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3010                 }
3011
3012                 return (0);
3013         }
3014         addr_inscope = 1;
3015         if (newaddr->sa_family == AF_INET) {
3016                 struct sockaddr_in *sin;
3017
3018                 sin = (struct sockaddr_in *)newaddr;
3019                 if (sin->sin_addr.s_addr == 0) {
3020                         /* Invalid address */
3021                         return (-1);
3022                 }
3023                 /* zero out the bzero area */
3024                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3025
3026                 /* assure len is set */
3027                 sin->sin_len = sizeof(struct sockaddr_in);
3028                 if (set_scope) {
3029 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3030                         stcb->ipv4_local_scope = 1;
3031 #else
3032                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3033                                 stcb->asoc.ipv4_local_scope = 1;
3034                         }
3035 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3036                 } else {
3037                         /* Validate the address is in scope */
3038                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3039                             (stcb->asoc.ipv4_local_scope == 0)) {
3040                                 addr_inscope = 0;
3041                         }
3042                 }
3043         } else if (newaddr->sa_family == AF_INET6) {
3044                 struct sockaddr_in6 *sin6;
3045
3046                 sin6 = (struct sockaddr_in6 *)newaddr;
3047                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3048                         /* Invalid address */
3049                         return (-1);
3050                 }
3051                 /* assure len is set */
3052                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3053                 if (set_scope) {
3054                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3055                                 stcb->asoc.loopback_scope = 1;
3056                                 stcb->asoc.local_scope = 0;
3057                                 stcb->asoc.ipv4_local_scope = 1;
3058                                 stcb->asoc.site_scope = 1;
3059                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3060                                 /*
3061                                  * If the new destination is a LINK_LOCAL we
3062                                  * must have common site scope. Don't set
3063                                  * the local scope since we may not share
3064                                  * all links, only loopback can do this.
3065                                  * Links on the local network would also be
3066                                  * on our private network for v4 too.
3067                                  */
3068                                 stcb->asoc.ipv4_local_scope = 1;
3069                                 stcb->asoc.site_scope = 1;
3070                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3071                                 /*
3072                                  * If the new destination is SITE_LOCAL then
3073                                  * we must have site scope in common.
3074                                  */
3075                                 stcb->asoc.site_scope = 1;
3076                         }
3077                 } else {
3078                         /* Validate the address is in scope */
3079                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3080                             (stcb->asoc.loopback_scope == 0)) {
3081                                 addr_inscope = 0;
3082                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3083                             (stcb->asoc.local_scope == 0)) {
3084                                 addr_inscope = 0;
3085                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3086                             (stcb->asoc.site_scope == 0)) {
3087                                 addr_inscope = 0;
3088                         }
3089                 }
3090         } else {
3091                 /* not supported family type */
3092                 return (-1);
3093         }
3094         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3095         if (net == NULL) {
3096                 return (-1);
3097         }
3098         SCTP_INCR_RADDR_COUNT();
3099         bzero(net, sizeof(*net));
3100         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3101         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3102         if (newaddr->sa_family == AF_INET) {
3103                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3104         } else if (newaddr->sa_family == AF_INET6) {
3105                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3106         }
3107         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3108         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3109                 stcb->asoc.loopback_scope = 1;
3110                 stcb->asoc.ipv4_local_scope = 1;
3111                 stcb->asoc.local_scope = 0;
3112                 stcb->asoc.site_scope = 1;
3113                 addr_inscope = 1;
3114         }
3115         net->failure_threshold = stcb->asoc.def_net_failure;
3116         if (addr_inscope == 0) {
3117                 net->dest_state = (SCTP_ADDR_REACHABLE |
3118                     SCTP_ADDR_OUT_OF_SCOPE);
3119         } else {
3120                 if (from == SCTP_ADDR_IS_CONFIRMED)
3121                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3122                         net->dest_state = SCTP_ADDR_REACHABLE;
3123                 else
3124                         net->dest_state = SCTP_ADDR_REACHABLE |
3125                             SCTP_ADDR_UNCONFIRMED;
3126         }
3127         /*
3128          * We set this to 0, the timer code knows that this means its an
3129          * initial value
3130          */
3131         net->RTO = 0;
3132         net->RTO_measured = 0;
3133         stcb->asoc.numnets++;
3134         *(&net->ref_count) = 1;
3135         net->tos_flowlabel = 0;
3136 #ifdef INET
3137         if (newaddr->sa_family == AF_INET)
3138                 net->tos_flowlabel = stcb->asoc.default_tos;
3139 #endif
3140 #ifdef INET6
3141         if (newaddr->sa_family == AF_INET6)
3142                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3143 #endif
3144         /* Init the timer structure */
3145         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3146         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3147         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3148
3149         /* Now generate a route for this guy */
3150         /* KAME hack: embed scopeid */
3151         if (newaddr->sa_family == AF_INET6) {
3152                 struct sockaddr_in6 *sin6;
3153
3154                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3155                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3156                 sin6->sin6_scope_id = 0;
3157         }
3158         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3159
3160         if (newaddr->sa_family == AF_INET6) {
3161                 struct sockaddr_in6 *sin6;
3162
3163                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3164                 (void)sa6_recoverscope(sin6);
3165         }
3166         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3167                 /* Get source address */
3168                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3169                     stcb,
3170                     (sctp_route_t *) & net->ro,
3171                     net,
3172                     0,
3173                     stcb->asoc.vrf_id);
3174                 /* Now get the interface MTU */
3175                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3176                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3177                 } else {
3178                         net->mtu = 0;
3179                 }
3180 #ifdef SCTP_PRINT_FOR_B_AND_M
3181                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3182 #endif
3183                 if (net->mtu == 0) {
3184                         /* Huh ?? */
3185                         net->mtu = SCTP_DEFAULT_MTU;
3186                 } else {
3187                         uint32_t rmtu;
3188
3189                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3190 #ifdef SCTP_PRINT_FOR_B_AND_M
3191                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3192 #endif
3193                         if (rmtu == 0) {
3194                                 /*
3195                                  * Start things off to match mtu of
3196                                  * interface please.
3197                                  */
3198                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3199                                     net->ro.ro_rt, net->mtu);
3200                         } else {
3201                                 /*
3202                                  * we take the route mtu over the interface,
3203                                  * since the route may be leading out the
3204                                  * loopback, or a different interface.
3205                                  */
3206                                 net->mtu = rmtu;
3207                         }
3208                 }
3209                 if (from == SCTP_ALLOC_ASOC) {
3210 #ifdef SCTP_PRINT_FOR_B_AND_M
3211                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3212 #endif
3213                         stcb->asoc.smallest_mtu = net->mtu;
3214                 }
3215         } else {
3216                 net->mtu = stcb->asoc.smallest_mtu;
3217         }
3218         if (stcb->asoc.smallest_mtu > net->mtu) {
3219 #ifdef SCTP_PRINT_FOR_B_AND_M
3220                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3221                     net->mtu, stcb->asoc.smallest_mtu);
3222 #endif
3223                 stcb->asoc.smallest_mtu = net->mtu;
3224         }
3225         /* JRS - Use the congestion control given in the CC module */
3226         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3227
3228         /*
3229          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3230          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3231          */
3232         net->find_pseudo_cumack = 1;
3233         net->find_rtx_pseudo_cumack = 1;
3234         net->src_addr_selected = 0;
3235         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3236         if (net->ro.ro_rt == NULL) {
3237                 /* Since we have no route put it at the back */
3238                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3239         } else if (netfirst == NULL) {
3240                 /* We are the first one in the pool. */
3241                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3242         } else if (netfirst->ro.ro_rt == NULL) {
3243                 /*
3244                  * First one has NO route. Place this one ahead of the first
3245                  * one.
3246                  */
3247                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3248         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3249                 /*
3250                  * This one has a different interface than the one at the
3251                  * top of the list. Place it ahead.
3252                  */
3253                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3254         } else {
3255                 /*
3256                  * Ok we have the same interface as the first one. Move
3257                  * forward until we find either a) one with a NULL route...
3258                  * insert ahead of that b) one with a different ifp.. insert
3259                  * after that. c) end of the list.. insert at the tail.
3260                  */
3261                 struct sctp_nets *netlook;
3262
3263                 do {
3264                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3265                         if (netlook == NULL) {
3266                                 /* End of the list */
3267                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3268                                 break;
3269                         } else if (netlook->ro.ro_rt == NULL) {
3270                                 /* next one has NO route */
3271                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3272                                 break;
3273                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3274                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3275                                     net, sctp_next);
3276                                 break;
3277                         }
3278                         /* Shift forward */
3279                         netfirst = netlook;
3280                 } while (netlook != NULL);
3281         }
3282
3283         /* got to have a primary set */
3284         if (stcb->asoc.primary_destination == 0) {
3285                 stcb->asoc.primary_destination = net;
3286         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3287                     (net->ro.ro_rt) &&
3288             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3289                 /* No route to current primary adopt new primary */
3290                 stcb->asoc.primary_destination = net;
3291         }
3292         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3293             net);
3294         /* Validate primary is first */
3295         net = TAILQ_FIRST(&stcb->asoc.nets);
3296         if ((net != stcb->asoc.primary_destination) &&
3297             (stcb->asoc.primary_destination)) {
3298                 /*
3299                  * first one on the list is NOT the primary sctp_cmpaddr()
3300                  * is much more efficent if the primary is the first on the
3301                  * list, make it so.
3302                  */
3303                 TAILQ_REMOVE(&stcb->asoc.nets,
3304                     stcb->asoc.primary_destination, sctp_next);
3305                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3306                     stcb->asoc.primary_destination, sctp_next);
3307         }
3308         return (0);
3309 }
3310
3311
3312 /*
3313  * allocate an association and add it to the endpoint. The caller must be
3314  * careful to add all additional addresses once they are know right away or
3315  * else the assoc will be may experience a blackout scenario.
3316  */
3317 struct sctp_tcb *
3318 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3319     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3320     struct thread *p
3321 )
3322 {
3323         /* note the p argument is only valid in unbound sockets */
3324
3325         struct sctp_tcb *stcb;
3326         struct sctp_association *asoc;
3327         struct sctpasochead *head;
3328         uint16_t rport;
3329         int err;
3330
3331         /*
3332          * Assumption made here: Caller has done a
3333          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3334          * address does not exist already.
3335          */
3336         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3337                 /* Hit max assoc, sorry no more */
3338                 *error = ENOBUFS;
3339                 return (NULL);
3340         }
3341         if (firstaddr == NULL) {
3342                 *error = EINVAL;
3343                 return (NULL);
3344         }
3345         SCTP_INP_RLOCK(inp);
3346         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3347                 /*
3348                  * If its in the TCP pool, its NOT allowed to create an
3349                  * association. The parent listener needs to call
3350                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3351                  * off, or connected one does this.. its an error.
3352                  */
3353                 SCTP_INP_RUNLOCK(inp);
3354                 *error = EINVAL;
3355                 return (NULL);
3356         }
3357         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3358 #ifdef SCTP_DEBUG
3359         if (firstaddr) {
3360                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3361                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3362                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3363         } else {
3364                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3365         }
3366 #endif                          /* SCTP_DEBUG */
3367         if (firstaddr->sa_family == AF_INET) {
3368                 struct sockaddr_in *sin;
3369
3370                 sin = (struct sockaddr_in *)firstaddr;
3371                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3372                         /* Invalid address */
3373                         SCTP_INP_RUNLOCK(inp);
3374                         *error = EINVAL;
3375                         return (NULL);
3376                 }
3377                 rport = sin->sin_port;
3378         } else if (firstaddr->sa_family == AF_INET6) {
3379                 struct sockaddr_in6 *sin6;
3380
3381                 sin6 = (struct sockaddr_in6 *)firstaddr;
3382                 if ((sin6->sin6_port == 0) ||
3383                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3384                         /* Invalid address */
3385                         SCTP_INP_RUNLOCK(inp);
3386                         *error = EINVAL;
3387                         return (NULL);
3388                 }
3389                 rport = sin6->sin6_port;
3390         } else {
3391                 /* not supported family type */
3392                 SCTP_INP_RUNLOCK(inp);
3393                 *error = EINVAL;
3394                 return (NULL);
3395         }
3396         SCTP_INP_RUNLOCK(inp);
3397         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3398                 /*
3399                  * If you have not performed a bind, then we need to do the
3400                  * ephemerial bind for you.
3401                  */
3402                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3403                     (struct sockaddr *)NULL,
3404                     p
3405                     ))) {
3406                         /* bind error, probably perm */
3407                         *error = err;
3408                         return (NULL);
3409                 }
3410         }
3411         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3412         if (stcb == NULL) {
3413                 /* out of memory? */
3414                 *error = ENOMEM;
3415                 return (NULL);
3416         }
3417         SCTP_INCR_ASOC_COUNT();
3418
3419         bzero(stcb, sizeof(*stcb));
3420         asoc = &stcb->asoc;
3421         SCTP_TCB_LOCK_INIT(stcb);
3422         SCTP_TCB_SEND_LOCK_INIT(stcb);
3423         /* setup back pointer's */
3424         stcb->sctp_ep = inp;
3425         stcb->sctp_socket = inp->sctp_socket;
3426         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3427                 /* failed */
3428                 SCTP_TCB_LOCK_DESTROY(stcb);
3429                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3430                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3431                 SCTP_DECR_ASOC_COUNT();
3432                 *error = err;
3433                 return (NULL);
3434         }
3435         /* and the port */
3436         stcb->rport = rport;
3437         SCTP_INP_INFO_WLOCK();
3438         SCTP_INP_WLOCK(inp);
3439         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3440                 /* inpcb freed while alloc going on */
3441                 SCTP_TCB_LOCK_DESTROY(stcb);
3442                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3443                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3444                 SCTP_INP_WUNLOCK(inp);
3445                 SCTP_INP_INFO_WUNLOCK();
3446                 SCTP_DECR_ASOC_COUNT();
3447                 *error = EINVAL;
3448                 return (NULL);
3449         }
3450         SCTP_TCB_LOCK(stcb);
3451
3452         /* now that my_vtag is set, add it to the hash */
3453         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3454             sctppcbinfo.hashasocmark)];
3455         /* put it in the bucket in the vtag hash of assoc's for the system */
3456         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3457         SCTP_INP_INFO_WUNLOCK();
3458
3459         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3460                 /* failure.. memory error? */
3461                 if (asoc->strmout) {
3462                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3463                         asoc->strmout = NULL;
3464                 }
3465                 if (asoc->mapping_array) {
3466                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3467                         asoc->mapping_array = NULL;
3468                 }
3469                 SCTP_DECR_ASOC_COUNT();
3470                 SCTP_TCB_LOCK_DESTROY(stcb);
3471                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3472                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3473                 SCTP_INP_WUNLOCK(inp);
3474                 *error = ENOBUFS;
3475                 return (NULL);
3476         }
3477         /* Init all the timers */
3478         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3479         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3480         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3481         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3482         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3483         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3484         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3485
3486         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3487         /* now file the port under the hash as well */
3488         if (inp->sctp_tcbhash != NULL) {
3489                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3490                     inp->sctp_hashmark)];
3491                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3492         }
3493         SCTP_INP_WUNLOCK(inp);
3494         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3495         return (stcb);
3496 }
3497
3498
3499 void
3500 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3501 {
3502         struct sctp_association *asoc;
3503
3504         asoc = &stcb->asoc;
3505         asoc->numnets--;
3506         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3507         if (net == asoc->primary_destination) {
3508                 /* Reset primary */
3509                 struct sctp_nets *lnet;
3510
3511                 lnet = TAILQ_FIRST(&asoc->nets);
3512                 /* Try to find a confirmed primary */
3513                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3514         }
3515         if (net == asoc->last_data_chunk_from) {
3516                 /* Reset primary */
3517                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3518         }
3519         if (net == asoc->last_control_chunk_from) {
3520                 /* Clear net */
3521                 asoc->last_control_chunk_from = NULL;
3522         }
3523         sctp_free_remote_addr(net);
3524 }
3525
3526 /*
3527  * remove a remote endpoint address from an association, it will fail if the
3528  * address does not exist.
3529  */
3530 int
3531 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3532 {
3533         /*
3534          * Here we need to remove a remote address. This is quite simple, we
3535          * first find it in the list of address for the association
3536          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3537          * on that item. Note we do not allow it to be removed if there are
3538          * no other addresses.
3539          */
3540         struct sctp_association *asoc;
3541         struct sctp_nets *net, *net_tmp;
3542
3543         asoc = &stcb->asoc;
3544
3545         /* locate the address */
3546         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3547                 net_tmp = TAILQ_NEXT(net, sctp_next);
3548                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3549                         continue;
3550                 }
3551                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3552                     remaddr)) {
3553                         /* we found the guy */
3554                         if (asoc->numnets < 2) {
3555                                 /* Must have at LEAST two remote addresses */
3556                                 return (-1);
3557                         } else {
3558                                 sctp_remove_net(stcb, net);
3559                                 return (0);
3560                         }
3561                 }
3562         }
3563         /* not found. */
3564         return (-2);
3565 }
3566
3567
3568 void
3569 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time)
3570 {
3571         struct sctpvtaghead *chain;
3572         struct sctp_tagblock *twait_block;
3573         struct timeval now;
3574         int set, i;
3575
3576         (void)SCTP_GETTIME_TIMEVAL(&now);
3577         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3578         set = 0;
3579         if (!SCTP_LIST_EMPTY(chain)) {
3580                 /* Block(s) present, lets find space, and expire on the fly */
3581                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3582                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3583                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3584                                     !set) {
3585                                         twait_block->vtag_block[i].tv_sec_at_expire =
3586                                             now.tv_sec + time;
3587                                         twait_block->vtag_block[i].v_tag = tag;
3588                                         set = 1;
3589                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3590                                             ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3591                                     now.tv_sec)) {
3592                                         /* Audit expires this guy */
3593                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3594                                         twait_block->vtag_block[i].v_tag = 0;
3595                                         if (set == 0) {
3596                                                 /* Reuse it for my new tag */
3597                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3598                                                 twait_block->vtag_block[0].v_tag = tag;
3599                                                 set = 1;
3600                                         }
3601                                 }
3602                         }
3603                         if (set) {
3604                                 /*
3605                                  * We only do up to the block where we can
3606                                  * place our tag for audits
3607                                  */
3608                                 break;
3609                         }
3610                 }
3611         }
3612         /* Need to add a new block to chain */
3613         if (!set) {
3614                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3615                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
3616                 if (twait_block == NULL) {
3617                         return;
3618                 }
3619                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
3620                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3621                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3622                     SCTP_TIME_WAIT;
3623                 twait_block->vtag_block[0].v_tag = tag;
3624         }
3625 }
3626
3627
3628 static void
3629 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3630 {
3631         struct sctp_iterator *it;
3632
3633         /*
3634          * Unlock the tcb lock we do this so we avoid a dead lock scenario
3635          * where the iterator is waiting on the TCB lock and the TCB lock is
3636          * waiting on the iterator lock.
3637          */
3638         it = stcb->asoc.stcb_starting_point_for_iterator;
3639         if (it == NULL) {
3640                 return;
3641         }
3642         if (it->inp != stcb->sctp_ep) {
3643                 /* hmm, focused on the wrong one? */
3644                 return;
3645         }
3646         if (it->stcb != stcb) {
3647                 return;
3648         }
3649         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3650         if (it->stcb == NULL) {
3651                 /* done with all asoc's in this assoc */
3652                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3653                         it->inp = NULL;
3654                 } else {
3655                         it->inp = LIST_NEXT(inp, sctp_list);
3656                 }
3657         }
3658 }
3659
3660
3661 /*
3662  * Free the association after un-hashing the remote port.
3663  */
3664 int
3665 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
3666 {
3667         int i;
3668         struct sctp_association *asoc;
3669         struct sctp_nets *net, *prev;
3670         struct sctp_laddr *laddr;
3671         struct sctp_tmit_chunk *chk;
3672         struct sctp_asconf_addr *aparam;
3673         struct sctp_stream_reset_list *liste;
3674         struct sctp_queued_to_read *sq;
3675         struct sctp_stream_queue_pending *sp;
3676         sctp_sharedkey_t *shared_key;
3677         struct socket *so;
3678         int ccnt = 0;
3679         int cnt = 0;
3680
3681         /* first, lets purge the entry from the hash table. */
3682
3683 #ifdef SCTP_LOG_CLOSING
3684         sctp_log_closing(inp, stcb, 6);
3685 #endif
3686         if (stcb->asoc.state == 0) {
3687 #ifdef SCTP_LOG_CLOSING
3688                 sctp_log_closing(inp, NULL, 7);
3689 #endif
3690                 /* there is no asoc, really TSNH :-0 */
3691                 return (1);
3692         }
3693         /* TEMP CODE */
3694         if (stcb->freed_from_where == 0) {
3695                 /* Only record the first place free happened from */
3696                 stcb->freed_from_where = from_location;
3697         }
3698         /* TEMP CODE */
3699
3700         asoc = &stcb->asoc;
3701         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3702             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3703                 /* nothing around */
3704                 so = NULL;
3705         else
3706                 so = inp->sctp_socket;
3707
3708         /*
3709          * We used timer based freeing if a reader or writer is in the way.
3710          * So we first check if we are actually being called from a timer,
3711          * if so we abort early if a reader or writer is still in the way.
3712          */
3713         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3714             (from_inpcbfree == SCTP_NORMAL_PROC)) {
3715                 /*
3716                  * is it the timer driving us? if so are the reader/writers
3717                  * gone?
3718                  */
3719                 if (stcb->asoc.refcnt) {
3720                         /* nope, reader or writer in the way */
3721                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3722                         /* no asoc destroyed */
3723                         SCTP_TCB_UNLOCK(stcb);
3724 #ifdef SCTP_LOG_CLOSING
3725                         sctp_log_closing(inp, stcb, 8);
3726 #endif
3727                         return (0);
3728                 }
3729         }
3730         /* now clean up any other timers */
3731         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3732         asoc->hb_timer.self = NULL;
3733         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3734         asoc->dack_timer.self = NULL;
3735         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3736         /*-
3737          * For stream reset we don't blast this unless
3738          * it is a str-reset timer, it might be the
3739          * free-asoc timer which we DON'T want to
3740          * disturb.
3741          */
3742         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
3743                 asoc->strreset_timer.self = NULL;
3744         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3745         asoc->asconf_timer.self = NULL;
3746         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3747         asoc->autoclose_timer.self = NULL;
3748         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3749         asoc->shut_guard_timer.self = NULL;
3750         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3751         asoc->delayed_event_timer.self = NULL;
3752         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3753                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3754                 net->fr_timer.self = NULL;
3755                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3756                 net->rxt_timer.self = NULL;
3757                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3758                 net->pmtu_timer.self = NULL;
3759         }
3760         /* Now the read queue needs to be cleaned up (only once) */
3761         cnt = 0;
3762         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
3763                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3764                 SCTP_INP_READ_LOCK(inp);
3765                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
3766                         if (sq->stcb == stcb) {
3767                                 sq->do_not_ref_stcb = 1;
3768                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3769                                 /*
3770                                  * If there is no end, there never will be
3771                                  * now.
3772                                  */
3773                                 if (sq->end_added == 0) {
3774                                         /* Held for PD-API clear that. */
3775                                         sq->pdapi_aborted = 1;
3776                                         sq->held_length = 0;
3777                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3778                                                 /*
3779                                                  * Need to add a PD-API
3780                                                  * aborted indication.
3781                                                  * Setting the control_pdapi
3782                                                  * assures that it will be
3783                                                  * added right after this
3784                                                  * msg.
3785                                                  */
3786                                                 uint32_t strseq;
3787
3788                                                 stcb->asoc.control_pdapi = sq;
3789                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
3790                                                 sctp_notify_partial_delivery_indication(stcb,
3791                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
3792                                                 stcb->asoc.control_pdapi = NULL;
3793                                         }
3794                                 }
3795                                 /* Add an end to wake them */
3796                                 sq->end_added = 1;
3797                                 cnt++;
3798                         }
3799                 }
3800                 SCTP_INP_READ_UNLOCK(inp);
3801                 if (stcb->block_entry) {
3802                         cnt++;
3803                         stcb->block_entry->error = ECONNRESET;
3804                         stcb->block_entry = NULL;
3805                 }
3806         }
3807         if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) {
3808                 /*
3809                  * reader or writer in the way, we have hopefully given him
3810                  * something to chew on above.
3811                  */
3812                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3813                 SCTP_TCB_UNLOCK(stcb);
3814                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3815                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3816                         /* nothing around */
3817                         so = NULL;
3818                 if (so) {
3819                         /* Wake any reader/writers */
3820                         sctp_sorwakeup(inp, so);
3821                         sctp_sowwakeup(inp, so);
3822                 }
3823 #ifdef SCTP_LOG_CLOSING
3824                 sctp_log_closing(inp, stcb, 9);
3825 #endif
3826                 /* no asoc destroyed */
3827                 return (0);
3828         }
3829 #ifdef SCTP_LOG_CLOSING
3830         sctp_log_closing(inp, stcb, 10);
3831 #endif
3832         /*
3833          * When I reach here, no others want to kill the assoc yet.. and I
3834          * own the lock. Now its possible an abort comes in when I do the
3835          * lock exchange below to grab all the locks to do the final take
3836          * out. to prevent this we increment the count, which will start a
3837          * timer and blow out above thus assuring us that we hold exclusive
3838          * killing of the asoc. Note that after getting back the TCB lock we
3839          * will go ahead and increment the counter back up and stop any
3840          * timer a passing stranger may have started :-S
3841          */
3842         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3843                 atomic_add_int(&stcb->asoc.refcnt, 1);
3844
3845                 SCTP_TCB_UNLOCK(stcb);
3846
3847                 SCTP_ITERATOR_LOCK();
3848                 SCTP_INP_INFO_WLOCK();
3849                 SCTP_INP_WLOCK(inp);
3850                 SCTP_TCB_LOCK(stcb);
3851         }
3852         /* Double check the GONE flag */
3853         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3854             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3855                 /* nothing around */
3856                 so = NULL;
3857
3858         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3859             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3860                 /*
3861                  * For TCP type we need special handling when we are
3862                  * connected. We also include the peel'ed off ones to.
3863                  */
3864                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3865                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3866                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3867                         if (so) {
3868                                 SOCK_LOCK(so);
3869                                 if (so->so_rcv.sb_cc == 0) {
3870                                         so->so_state &= ~(SS_ISCONNECTING |
3871                                             SS_ISDISCONNECTING |
3872                                             SS_ISCONFIRMING |
3873                                             SS_ISCONNECTED);
3874                                 }
3875                                 SOCK_UNLOCK(so);
3876                                 sctp_sowwakeup(inp, so);
3877                                 sctp_sorwakeup(inp, so);
3878                                 SCTP_SOWAKEUP(so);
3879                         }
3880                 }
3881         }
3882         /*
3883          * Make it invalid too, that way if its about to run it will abort
3884          * and return.
3885          */
3886         sctp_iterator_asoc_being_freed(inp, stcb);
3887         /* re-increment the lock */
3888         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3889                 atomic_add_int(&stcb->asoc.refcnt, -1);
3890         }
3891         asoc->state = 0;
3892         if (inp->sctp_tcbhash) {
3893                 LIST_REMOVE(stcb, sctp_tcbhash);
3894         }
3895         if (stcb->asoc.in_restart_hash) {
3896                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3897         }
3898         /* Now lets remove it from the list of ALL associations in the EP */
3899         LIST_REMOVE(stcb, sctp_tcblist);
3900         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3901                 SCTP_INP_INCR_REF(inp);
3902                 SCTP_INP_WUNLOCK(inp);
3903                 SCTP_ITERATOR_UNLOCK();
3904         }
3905         /* pull from vtag hash */
3906         LIST_REMOVE(stcb, sctp_asocs);
3907         sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT);
3908
3909
3910         /*
3911          * Now restop the timers to be sure - this is paranoia at is finest!
3912          */
3913         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3914         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3915         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3916         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3917         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3918         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3919         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3920         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3921
3922         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3923                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3924                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3925                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3926         }
3927
3928         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3929         prev = NULL;
3930         /*
3931          * The chunk lists and such SHOULD be empty but we check them just
3932          * in case.
3933          */
3934         /* anything on the wheel needs to be removed */
3935         for (i = 0; i < asoc->streamoutcnt; i++) {
3936                 struct sctp_stream_out *outs;
3937
3938                 outs = &asoc->strmout[i];
3939                 /* now clean up any chunks here */
3940                 sp = TAILQ_FIRST(&outs->outqueue);
3941                 while (sp) {
3942                         TAILQ_REMOVE(&outs->outqueue, sp, next);
3943                         if (sp->data) {
3944                                 sctp_m_freem(sp->data);
3945                                 sp->data = NULL;
3946                                 sp->tail_mbuf = NULL;
3947                         }
3948                         sctp_free_remote_addr(sp->net);
3949                         sctp_free_spbufspace(stcb, asoc, sp);
3950                         /* Free the zone stuff  */
3951                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3952                         SCTP_DECR_STRMOQ_COUNT();
3953                         /* sa_ignore FREED_MEMORY */
3954                         sp = TAILQ_FIRST(&outs->outqueue);
3955                 }
3956         }
3957
3958         /* sa_ignore FREED_MEMORY */
3959         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3960                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3961                 SCTP_FREE(liste, SCTP_M_STRESET);
3962         }
3963
3964         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3965         while (sq) {
3966                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3967                 if (sq->data) {
3968                         sctp_m_freem(sq->data);
3969                         sq->data = NULL;
3970                 }
3971                 sctp_free_remote_addr(sq->whoFrom);
3972                 sq->whoFrom = NULL;
3973                 sq->stcb = NULL;
3974                 /* Free the ctl entry */
3975                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3976                 SCTP_DECR_READQ_COUNT();
3977                 /* sa_ignore FREED_MEMORY */
3978                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3979         }
3980
3981         chk = TAILQ_FIRST(&asoc->free_chunks);
3982         while (chk) {
3983                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3984                 if (chk->data) {
3985                         sctp_m_freem(chk->data);
3986                         chk->data = NULL;
3987                 }
3988                 ccnt++;
3989                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
3990                 SCTP_DECR_CHK_COUNT();
3991                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
3992                 asoc->free_chunk_cnt--;
3993                 /* sa_ignore FREED_MEMORY */
3994                 chk = TAILQ_FIRST(&asoc->free_chunks);
3995         }
3996         /* pending send queue SHOULD be empty */
3997         if (!TAILQ_EMPTY(&asoc->send_queue)) {
3998                 chk = TAILQ_FIRST(&asoc->send_queue);
3999                 while (chk) {
4000                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4001                         if (chk->data) {
4002                                 sctp_m_freem(chk->data);
4003                                 chk->data = NULL;
4004                         }
4005                         ccnt++;
4006                         sctp_free_remote_addr(chk->whoTo);
4007                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4008                         SCTP_DECR_CHK_COUNT();
4009                         /* sa_ignore FREED_MEMORY */
4010                         chk = TAILQ_FIRST(&asoc->send_queue);
4011                 }
4012         }
4013 /*
4014   if(ccnt) {
4015   printf("Freed %d from send_queue\n", ccnt);
4016   ccnt = 0;
4017   }
4018 */
4019         /* sent queue SHOULD be empty */
4020         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4021                 chk = TAILQ_FIRST(&asoc->sent_queue);
4022                 while (chk) {
4023                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4024                         if (chk->data) {
4025                                 sctp_m_freem(chk->data);
4026                                 chk->data = NULL;
4027                         }
4028                         ccnt++;
4029                         sctp_free_remote_addr(chk->whoTo);
4030                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4031                         SCTP_DECR_CHK_COUNT();
4032                         /* sa_ignore FREED_MEMORY */
4033                         chk = TAILQ_FIRST(&asoc->sent_queue);
4034                 }
4035         }
4036 /*
4037   if(ccnt) {
4038   printf("Freed %d from sent_queue\n", ccnt);
4039   ccnt = 0;
4040   }
4041 */
4042         /* control queue MAY not be empty */
4043         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4044                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4045                 while (chk) {
4046                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4047                         if (chk->data) {
4048                                 sctp_m_freem(chk->data);
4049                                 chk->data = NULL;
4050                         }
4051                         ccnt++;
4052                         sctp_free_remote_addr(chk->whoTo);
4053                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4054                         SCTP_DECR_CHK_COUNT();
4055                         /* sa_ignore FREED_MEMORY */
4056                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4057                 }
4058         }
4059 /*
4060   if(ccnt) {
4061   printf("Freed %d from ctrl_queue\n", ccnt);
4062   ccnt = 0;
4063   }
4064 */
4065         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4066                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4067                 while (chk) {
4068                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4069                         if (chk->data) {
4070                                 sctp_m_freem(chk->data);
4071                                 chk->data = NULL;
4072                         }
4073                         sctp_free_remote_addr(chk->whoTo);
4074                         ccnt++;
4075                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4076                         SCTP_DECR_CHK_COUNT();
4077                         /* sa_ignore FREED_MEMORY */
4078                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4079                 }
4080         }
4081 /*
4082   if(ccnt) {
4083   printf("Freed %d from reasm_queue\n", ccnt);
4084   ccnt = 0;
4085   }
4086 */
4087         if (asoc->mapping_array) {
4088                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4089                 asoc->mapping_array = NULL;
4090         }
4091         /* the stream outs */
4092         if (asoc->strmout) {
4093                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4094                 asoc->strmout = NULL;
4095         }
4096         asoc->streamoutcnt = 0;
4097         if (asoc->strmin) {
4098                 struct sctp_queued_to_read *ctl;
4099
4100                 for (i = 0; i < asoc->streamincnt; i++) {
4101                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4102                                 /* We have somethings on the streamin queue */
4103                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4104                                 while (ctl) {
4105                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4106                                             ctl, next);
4107                                         sctp_free_remote_addr(ctl->whoFrom);
4108                                         if (ctl->data) {
4109                                                 sctp_m_freem(ctl->data);
4110                                                 ctl->data = NULL;
4111                                         }
4112                                         /*
4113                                          * We don't free the address here
4114                                          * since all the net's were freed
4115                                          * above.
4116                                          */
4117                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4118                                         SCTP_DECR_READQ_COUNT();
4119                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4120                                 }
4121                         }
4122                 }
4123                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4124                 asoc->strmin = NULL;
4125         }
4126         asoc->streamincnt = 0;
4127         while (!TAILQ_EMPTY(&asoc->nets)) {
4128                 /* sa_ignore FREED_MEMORY */
4129                 net = TAILQ_FIRST(&asoc->nets);
4130                 /* pull from list */
4131                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4132 #ifdef INVARIANTS
4133                         panic("no net's left alloc'ed, or list points to itself");
4134 #endif
4135                         break;
4136                 }
4137                 prev = net;
4138                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4139                 sctp_free_remote_addr(net);
4140         }
4141
4142         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4143                 /* sa_ignore FREED_MEMORY */
4144                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4145                 sctp_remove_laddr(laddr);
4146         }
4147
4148         /* pending asconf (address) parameters */
4149         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4150                 /* sa_ignore FREED_MEMORY */
4151                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4152                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4153                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4154         }
4155         if (asoc->last_asconf_ack_sent != NULL) {
4156                 sctp_m_freem(asoc->last_asconf_ack_sent);
4157                 asoc->last_asconf_ack_sent = NULL;
4158         }
4159         /* clean up auth stuff */
4160         if (asoc->local_hmacs)
4161                 sctp_free_hmaclist(asoc->local_hmacs);
4162         if (asoc->peer_hmacs)
4163                 sctp_free_hmaclist(asoc->peer_hmacs);
4164
4165         if (asoc->local_auth_chunks)
4166                 sctp_free_chunklist(asoc->local_auth_chunks);
4167         if (asoc->peer_auth_chunks)
4168                 sctp_free_chunklist(asoc->peer_auth_chunks);
4169
4170         sctp_free_authinfo(&asoc->authinfo);
4171
4172         shared_key = LIST_FIRST(&asoc->shared_keys);
4173         while (shared_key) {
4174                 LIST_REMOVE(shared_key, next);
4175                 sctp_free_sharedkey(shared_key);
4176                 /* sa_ignore FREED_MEMORY */
4177                 shared_key = LIST_FIRST(&asoc->shared_keys);
4178         }
4179
4180         /* Insert new items here :> */
4181
4182         /* Get rid of LOCK */
4183         SCTP_TCB_LOCK_DESTROY(stcb);
4184         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4185         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4186                 SCTP_INP_INFO_WUNLOCK();
4187                 SCTP_INP_RLOCK(inp);
4188         }
4189 #ifdef SCTP_TRACK_FREED_ASOCS
4190         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4191                 /* now clean up the tasoc itself */
4192                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4193                 SCTP_DECR_ASOC_COUNT();
4194         } else {
4195                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4196         }
4197 #else
4198         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4199         SCTP_DECR_ASOC_COUNT();
4200 #endif
4201         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4202                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4203                         /*
4204                          * If its NOT the inp_free calling us AND sctp_close
4205                          * as been called, we call back...
4206                          */
4207                         SCTP_INP_RUNLOCK(inp);
4208                         /*
4209                          * This will start the kill timer (if we are the
4210                          * lastone) since we hold an increment yet. But this
4211                          * is the only safe way to do this since otherwise
4212                          * if the socket closes at the same time we are here
4213                          * we might collide in the cleanup.
4214                          */
4215                         sctp_inpcb_free(inp,
4216                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4217                             SCTP_CALLED_DIRECTLY_NOCMPSET);
4218                         SCTP_INP_DECR_REF(inp);
4219                         goto out_of;
4220                 } else {
4221                         /* The socket is still open. */
4222                         SCTP_INP_DECR_REF(inp);
4223                 }
4224         }
4225         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4226                 SCTP_INP_RUNLOCK(inp);
4227         }
4228 out_of:
4229         /* destroyed the asoc */
4230 #ifdef SCTP_LOG_CLOSING
4231         sctp_log_closing(inp, NULL, 11);
4232 #endif
4233         return (1);
4234 }
4235
4236
4237
4238 /*
4239  * determine if a destination is "reachable" based upon the addresses bound
4240  * to the current endpoint (e.g. only v4 or v6 currently bound)
4241  */
4242 /*
4243  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4244  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4245  * types bound as its endpoint
4246  */
4247 int
4248 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4249 {
4250         struct sctp_inpcb *inp;
4251         int answer;
4252
4253         /*
4254          * No locks here, the TCB, in all cases is already locked and an
4255          * assoc is up. There is either a INP lock by the caller applied (in
4256          * asconf case when deleting an address) or NOT in the HB case,
4257          * however if HB then the INP increment is up and the INP will not
4258          * be removed (on top of the fact that we have a TCB lock). So we
4259          * only want to read the sctp_flags, which is either bound-all or
4260          * not.. no protection needed since once an assoc is up you can't be
4261          * changing your binding.
4262          */
4263         inp = stcb->sctp_ep;
4264         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4265                 /* if bound all, destination is not restricted */
4266                 /*
4267                  * RRS: Question during lock work: Is this correct? If you
4268                  * are bound-all you still might need to obey the V4--V6
4269                  * flags??? IMO this bound-all stuff needs to be removed!
4270                  */
4271                 return (1);
4272         }
4273         /* NOTE: all "scope" checks are done when local addresses are added */
4274         if (destaddr->sa_family == AF_INET6) {
4275                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4276         } else if (destaddr->sa_family == AF_INET) {
4277                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4278         } else {
4279                 /* invalid family, so it's unreachable */
4280                 answer = 0;
4281         }
4282         return (answer);
4283 }
4284
4285 /*
4286  * update the inp_vflags on an endpoint
4287  */
4288 static void
4289 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4290 {
4291         struct sctp_laddr *laddr;
4292
4293         /* first clear the flag */
4294         inp->ip_inp.inp.inp_vflag = 0;
4295         /* set the flag based on addresses on the ep list */
4296         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4297                 if (laddr->ifa == NULL) {
4298                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4299                             __FUNCTION__);
4300                         continue;
4301                 }
4302                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4303                         continue;
4304                 }
4305                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4306                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4307                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4308                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4309                 }
4310         }
4311 }
4312
4313 /*
4314  * Add the address to the endpoint local address list There is nothing to be
4315  * done if we are bound to all addresses
4316  */
4317 void
4318 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4319 {
4320         struct sctp_laddr *laddr;
4321         int fnd, error = 0;
4322
4323         fnd = 0;
4324
4325         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4326                 /* You are already bound to all. You have it already */
4327                 return;
4328         }
4329         if (ifa->address.sa.sa_family == AF_INET6) {
4330                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4331                         /* Can't bind a non-useable addr. */
4332                         return;
4333                 }
4334         }
4335         /* first, is it already present? */
4336         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4337                 if (laddr->ifa == ifa) {
4338                         fnd = 1;
4339                         break;
4340                 }
4341         }
4342
4343         if (fnd == 0) {
4344                 /* Not in the ep list */
4345                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4346                 if (error != 0)
4347                         return;
4348                 inp->laddr_count++;
4349                 /* update inp_vflag flags */
4350                 if (ifa->address.sa.sa_family == AF_INET6) {
4351                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4352                 } else if (ifa->address.sa.sa_family == AF_INET) {
4353                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4354                 }
4355         }
4356         return;
4357 }
4358
4359
4360 /*
4361  * select a new (hopefully reachable) destination net (should only be used
4362  * when we deleted an ep addr that is the only usable source address to reach
4363  * the destination net)
4364  */
4365 static void
4366 sctp_select_primary_destination(struct sctp_tcb *stcb)
4367 {
4368         struct sctp_nets *net;
4369
4370         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4371                 /* for now, we'll just pick the first reachable one we find */
4372                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4373                         continue;
4374                 if (sctp_destination_is_reachable(stcb,
4375                     (struct sockaddr *)&net->ro._l_addr)) {
4376                         /* found a reachable destination */
4377                         stcb->asoc.primary_destination = net;
4378                 }
4379         }
4380         /* I can't there from here! ...we're gonna die shortly... */
4381 }
4382
4383
4384 /*
4385  * Delete the address from the endpoint local address list There is nothing
4386  * to be done if we are bound to all addresses
4387  */
4388 void
4389 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4390 {
4391         struct sctp_laddr *laddr;
4392         int fnd;
4393
4394         fnd = 0;
4395         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4396                 /* You are already bound to all. You have it already */
4397                 return;
4398         }
4399         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4400                 if (laddr->ifa == ifa) {
4401                         fnd = 1;
4402                         break;
4403                 }
4404         }
4405         if (fnd && (inp->laddr_count < 2)) {
4406                 /* can't delete unless there are at LEAST 2 addresses */
4407                 return;
4408         }
4409         if (fnd) {
4410                 /*
4411                  * clean up any use of this address go through our
4412                  * associations and clear any last_used_address that match
4413                  * this one for each assoc, see if a new primary_destination
4414                  * is needed
4415                  */
4416                 struct sctp_tcb *stcb;
4417
4418                 /* clean up "next_addr_touse" */
4419                 if (inp->next_addr_touse == laddr)
4420                         /* delete this address */
4421                         inp->next_addr_touse = NULL;
4422
4423                 /* clean up "last_used_address" */
4424                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4425                         struct sctp_nets *net;
4426
4427                         SCTP_TCB_LOCK(stcb);
4428                         if (stcb->asoc.last_used_address == laddr)
4429                                 /* delete this address */
4430                                 stcb->asoc.last_used_address = NULL;
4431                         /*
4432                          * Now spin through all the nets and purge any ref
4433                          * to laddr
4434                          */
4435                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4436                                 if (net->ro._s_addr &&
4437                                     (net->ro._s_addr->ifa == laddr->ifa)) {
4438                                         /* Yep, purge src address selected */
4439                                         sctp_rtentry_t *rt;
4440
4441                                         /* delete this address if cached */
4442                                         rt = net->ro.ro_rt;
4443                                         if (rt != NULL) {
4444                                                 RTFREE(rt);
4445                                                 net->ro.ro_rt = NULL;
4446                                         }
4447                                         sctp_free_ifa(net->ro._s_addr);
4448                                         net->ro._s_addr = NULL;
4449                                         net->src_addr_selected = 0;
4450                                 }
4451                         }
4452                         SCTP_TCB_UNLOCK(stcb);
4453                 }               /* for each tcb */
4454                 /* remove it from the ep list */
4455                 sctp_remove_laddr(laddr);
4456                 inp->laddr_count--;
4457                 /* update inp_vflag flags */
4458                 sctp_update_ep_vflag(inp);
4459         }
4460         return;
4461 }
4462
4463 /*
4464  * Add the addr to the TCB local address list For the BOUNDALL or dynamic
4465  * case, this is a "pending" address list (eg. addresses waiting for an
4466  * ASCONF-ACK response) For the subset binding, static case, this is a
4467  * "valid" address list
4468  */
4469 void
4470 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list)
4471 {
4472         struct sctp_inpcb *inp;
4473         struct sctp_laddr *laddr;
4474         struct sctpladdr *list;
4475
4476         /*
4477          * Assumes TCB is locked.. and possibly the INP. May need to
4478          * confirm/fix that if we need it and is not the case.
4479          */
4480         list = &stcb->asoc.sctp_restricted_addrs;
4481
4482         inp = stcb->sctp_ep;
4483         if (ifa->address.sa.sa_family == AF_INET6) {
4484                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4485                         /* Can't bind a non-existent addr. */
4486                         return;
4487                 }
4488         }
4489         /* does the address already exist? */
4490         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4491                 if (laddr->ifa == ifa) {
4492                         return;
4493                 }
4494         }
4495
4496         /* add to the list */
4497         (void)sctp_insert_laddr(list, ifa, 0);
4498         return;
4499 }
4500
4501 /*
4502  * insert an laddr entry with the given ifa for the desired list
4503  */
4504 int
4505 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4506 {
4507         struct sctp_laddr *laddr;
4508
4509         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4510         if (laddr == NULL) {
4511                 /* out of memory? */
4512                 return (EINVAL);
4513         }
4514         SCTP_INCR_LADDR_COUNT();
4515         bzero(laddr, sizeof(*laddr));
4516         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
4517         laddr->ifa = ifa;
4518         laddr->action = act;
4519         atomic_add_int(&ifa->refcount, 1);
4520         /* insert it */
4521         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4522
4523         return (0);
4524 }
4525
4526 /*
4527  * Remove an laddr entry from the local address list (on an assoc)
4528  */
4529 void
4530 sctp_remove_laddr(struct sctp_laddr *laddr)
4531 {
4532
4533         /* remove from the list */
4534         LIST_REMOVE(laddr, sctp_nxt_addr);
4535         sctp_free_ifa(laddr->ifa);
4536         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4537         SCTP_DECR_LADDR_COUNT();
4538 }
4539
4540 /*
4541  * Remove an address from the TCB local address list
4542  */
4543 void
4544 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4545 {
4546         struct sctp_inpcb *inp;
4547         struct sctp_laddr *laddr;
4548
4549         /*
4550          * This is called by asconf work. It is assumed that a) The TCB is
4551          * locked and b) The INP is locked. This is true in as much as I can
4552          * trace through the entry asconf code where I did these locks.
4553          * Again, the ASCONF code is a bit different in that it does lock
4554          * the INP during its work often times. This must be since we don't
4555          * want other proc's looking up things while what they are looking
4556          * up is changing :-D
4557          */
4558
4559         inp = stcb->sctp_ep;
4560         /* if subset bound and don't allow ASCONF's, can't delete last */
4561         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4562             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
4563                 if (stcb->sctp_ep->laddr_count < 2) {
4564                         /* can't delete last address */
4565                         return;
4566                 }
4567         }
4568         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4569                 /* remove the address if it exists */
4570                 if (laddr->ifa == NULL)
4571                         continue;
4572                 if (laddr->ifa == ifa) {
4573                         sctp_remove_laddr(laddr);
4574                         return;
4575                 }
4576         }
4577
4578         /* address not found! */
4579         return;
4580 }
4581
4582 static char sctp_pcb_initialized = 0;
4583
4584 /*
4585  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4586  */
4587 /* sysctl */
4588 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4589 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4590
4591 void
4592 sctp_pcb_init()
4593 {
4594         /*
4595          * SCTP initialization for the PCB structures should be called by
4596          * the sctp_init() funciton.
4597          */
4598         int i;
4599
4600         if (sctp_pcb_initialized != 0) {
4601                 /* error I was called twice */
4602                 return;
4603         }
4604         sctp_pcb_initialized = 1;
4605
4606         bzero(&sctpstat, sizeof(struct sctpstat));
4607         (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime);
4608         /* init the empty list of (All) Endpoints */
4609         LIST_INIT(&sctppcbinfo.listhead);
4610
4611         /* init the iterator head */
4612         TAILQ_INIT(&sctppcbinfo.iteratorhead);
4613
4614         /* init the hash table of endpoints */
4615         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4616         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4617         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4618         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
4619             &sctppcbinfo.hashasocmark);
4620         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
4621             &sctppcbinfo.hashmark);
4622         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
4623             &sctppcbinfo.hashtcpmark);
4624         sctppcbinfo.hashtblsize = sctp_hashtblsize;
4625
4626         /* init the small hash table we use to track restarted asoc's */
4627         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
4628             &sctppcbinfo.hashrestartmark);
4629
4630
4631         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
4632             &sctppcbinfo.hashvrfmark);
4633
4634         sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
4635             &sctppcbinfo.vrf_ifn_hashmark);
4636
4637         /* init the zones */
4638         /*
4639          * FIX ME: Should check for NULL returns, but if it does fail we are
4640          * doomed to panic anyways... add later maybe.
4641          */
4642         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4643             sizeof(struct sctp_inpcb), maxsockets);
4644
4645         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4646             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4647
4648         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4649             sizeof(struct sctp_laddr),
4650             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4651
4652         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4653             sizeof(struct sctp_nets),
4654             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4655
4656         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4657             sizeof(struct sctp_tmit_chunk),
4658             (sctp_max_number_of_assoc * sctp_chunkscale));
4659
4660         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4661             sizeof(struct sctp_queued_to_read),
4662             (sctp_max_number_of_assoc * sctp_chunkscale));
4663
4664         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4665             sizeof(struct sctp_stream_queue_pending),
4666             (sctp_max_number_of_assoc * sctp_chunkscale));
4667
4668         /* Master Lock INIT for info structure */
4669         SCTP_INP_INFO_LOCK_INIT();
4670         SCTP_STATLOG_INIT_LOCK();
4671         SCTP_ITERATOR_LOCK_INIT();
4672
4673         SCTP_IPI_COUNT_INIT();
4674         SCTP_IPI_ADDR_INIT();
4675         SCTP_IPI_ITERATOR_WQ_INIT();
4676 #ifdef SCTP_PACKET_LOGGING
4677         SCTP_IP_PKTLOG_INIT();
4678 #endif
4679         LIST_INIT(&sctppcbinfo.addr_wq);
4680
4681         /* not sure if we need all the counts */
4682         sctppcbinfo.ipi_count_ep = 0;
4683         /* assoc/tcb zone info */
4684         sctppcbinfo.ipi_count_asoc = 0;
4685         /* local addrlist zone info */
4686         sctppcbinfo.ipi_count_laddr = 0;
4687         /* remote addrlist zone info */
4688         sctppcbinfo.ipi_count_raddr = 0;
4689         /* chunk info */
4690         sctppcbinfo.ipi_count_chunk = 0;
4691
4692         /* socket queue zone info */
4693         sctppcbinfo.ipi_count_readq = 0;
4694
4695         /* stream out queue cont */
4696         sctppcbinfo.ipi_count_strmoq = 0;
4697
4698         sctppcbinfo.ipi_free_strmoq = 0;
4699         sctppcbinfo.ipi_free_chunks = 0;
4700
4701         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
4702
4703         /* Init the TIMEWAIT list */
4704         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
4705                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4706         }
4707
4708 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
4709         sctppcbinfo.iterator_running = 0;
4710         sctp_startup_iterator();
4711 #endif
4712
4713         /*
4714          * INIT the default VRF which for BSD is the only one, other O/S's
4715          * may have more. But initially they must start with one and then
4716          * add the VRF's as addresses are added.
4717          */
4718         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
4719
4720 }
4721
4722
4723 int
4724 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4725     int iphlen, int offset, int limit, struct sctphdr *sh,
4726     struct sockaddr *altsa)
4727 {
4728         /*
4729          * grub through the INIT pulling addresses and loading them to the
4730          * nets structure in the asoc. The from address in the mbuf should
4731          * also be loaded (if it is not already). This routine can be called
4732          * with either INIT or INIT-ACK's as long as the m points to the IP
4733          * packet and the offset points to the beginning of the parameters.
4734          */
4735         struct sctp_inpcb *inp, *l_inp;
4736         struct sctp_nets *net, *net_tmp;
4737         struct ip *iph;
4738         struct sctp_paramhdr *phdr, parm_buf;
4739         struct sctp_tcb *stcb_tmp;
4740         uint16_t ptype, plen;
4741         struct sockaddr *sa;
4742         struct sockaddr_storage dest_store;
4743         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4744         struct sockaddr_in sin;
4745         struct sockaddr_in6 sin6;
4746         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
4747         struct sctp_auth_random *p_random = NULL;
4748         uint16_t random_len = 0;
4749         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
4750         struct sctp_auth_hmac_algo *hmacs = NULL;
4751         uint16_t hmacs_len = 0;
4752         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
4753         struct sctp_auth_chunk_list *chunks = NULL;
4754         uint16_t num_chunks = 0;
4755         sctp_key_t *new_key;
4756         uint32_t keylen;
4757         int got_random = 0, got_hmacs = 0, got_chklist = 0;
4758
4759         /* First get the destination address setup too. */
4760         memset(&sin, 0, sizeof(sin));
4761         memset(&sin6, 0, sizeof(sin6));
4762
4763         sin.sin_family = AF_INET;
4764         sin.sin_len = sizeof(sin);
4765         sin.sin_port = stcb->rport;
4766
4767         sin6.sin6_family = AF_INET6;
4768         sin6.sin6_len = sizeof(struct sockaddr_in6);
4769         sin6.sin6_port = stcb->rport;
4770         if (altsa == NULL) {
4771                 iph = mtod(m, struct ip *);
4772                 if (iph->ip_v == IPVERSION) {
4773                         /* its IPv4 */
4774                         struct sockaddr_in *sin_2;
4775
4776                         sin_2 = (struct sockaddr_in *)(local_sa);
4777                         memset(sin_2, 0, sizeof(sin));
4778                         sin_2->sin_family = AF_INET;
4779                         sin_2->sin_len = sizeof(sin);
4780                         sin_2->sin_port = sh->dest_port;
4781                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4782                         sin.sin_addr = iph->ip_src;
4783                         sa = (struct sockaddr *)&sin;
4784                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4785                         /* its IPv6 */
4786                         struct ip6_hdr *ip6;
4787                         struct sockaddr_in6 *sin6_2;
4788
4789                         ip6 = mtod(m, struct ip6_hdr *);
4790                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4791                         memset(sin6_2, 0, sizeof(sin6));
4792                         sin6_2->sin6_family = AF_INET6;
4793                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4794                         sin6_2->sin6_port = sh->dest_port;
4795                         sin6.sin6_addr = ip6->ip6_src;
4796                         sa = (struct sockaddr *)&sin6;
4797                 } else {
4798                         sa = NULL;
4799                 }
4800         } else {
4801                 /*
4802                  * For cookies we use the src address NOT from the packet
4803                  * but from the original INIT
4804                  */
4805                 sa = altsa;
4806         }
4807         /* Turn off ECN until we get through all params */
4808         stcb->asoc.ecn_allowed = 0;
4809         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4810                 /* mark all addresses that we have currently on the list */
4811                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4812         }
4813         /* does the source address already exist? if so skip it */
4814         l_inp = inp = stcb->sctp_ep;
4815
4816         atomic_add_int(&stcb->asoc.refcnt, 1);
4817         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4818         atomic_add_int(&stcb->asoc.refcnt, -1);
4819
4820         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4821                 /* we must add the source address */
4822                 /* no scope set here since we have a tcb already. */
4823                 if ((sa->sa_family == AF_INET) &&
4824                     (stcb->asoc.ipv4_addr_legal)) {
4825                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
4826                                 return (-1);
4827                         }
4828                 } else if ((sa->sa_family == AF_INET6) &&
4829                     (stcb->asoc.ipv6_addr_legal)) {
4830                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
4831                                 return (-2);
4832                         }
4833                 }
4834         } else {
4835                 if (net_tmp != NULL && stcb_tmp == stcb) {
4836                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4837                 } else if (stcb_tmp != stcb) {
4838                         /* It belongs to another association? */
4839                         if (stcb_tmp)
4840                                 SCTP_TCB_UNLOCK(stcb_tmp);
4841                         return (-3);
4842                 }
4843         }
4844         if (stcb->asoc.state == 0) {
4845                 /* the assoc was freed? */
4846                 return (-4);
4847         }
4848         /*
4849          * peer must explicitly turn this on. This may have been initialized
4850          * to be "on" in order to allow local addr changes while INIT's are
4851          * in flight.
4852          */
4853         stcb->asoc.peer_supports_asconf = 0;
4854         /* now we must go through each of the params. */
4855         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4856         while (phdr) {
4857                 ptype = ntohs(phdr->param_type);
4858                 plen = ntohs(phdr->param_length);
4859                 /*
4860                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4861                  * (int)plen);
4862                  */
4863                 if (offset + plen > limit) {
4864                         break;
4865                 }
4866                 if (plen == 0) {
4867                         break;
4868                 }
4869                 if (ptype == SCTP_IPV4_ADDRESS) {
4870                         if (stcb->asoc.ipv4_addr_legal) {
4871                                 struct sctp_ipv4addr_param *p4, p4_buf;
4872
4873                                 /* ok get the v4 address and check/add */
4874                                 phdr = sctp_get_next_param(m, offset,
4875                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4876                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4877                                     phdr == NULL) {
4878                                         return (-5);
4879                                 }
4880                                 p4 = (struct sctp_ipv4addr_param *)phdr;
4881                                 sin.sin_addr.s_addr = p4->addr;
4882                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
4883                                         /* Skip multi-cast addresses */
4884                                         goto next_param;
4885                                 }
4886                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
4887                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
4888                                         goto next_param;
4889                                 }
4890                                 sa = (struct sockaddr *)&sin;
4891                                 inp = stcb->sctp_ep;
4892                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4893                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4894                                     local_sa, stcb);
4895                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4896
4897                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4898                                     inp == NULL) {
4899                                         /* we must add the source address */
4900                                         /*
4901                                          * no scope set since we have a tcb
4902                                          * already
4903                                          */
4904
4905                                         /*
4906                                          * we must validate the state again
4907                                          * here
4908                                          */
4909                                         if (stcb->asoc.state == 0) {
4910                                                 /* the assoc was freed? */
4911                                                 return (-7);
4912                                         }
4913                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
4914                                                 return (-8);
4915                                         }
4916                                 } else if (stcb_tmp == stcb) {
4917                                         if (stcb->asoc.state == 0) {
4918                                                 /* the assoc was freed? */
4919                                                 return (-10);
4920                                         }
4921                                         if (net != NULL) {
4922                                                 /* clear flag */
4923                                                 net->dest_state &=
4924                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4925                                         }
4926                                 } else {
4927                                         /*
4928                                          * strange, address is in another
4929                                          * assoc? straighten out locks.
4930                                          */
4931                                         if (stcb_tmp)
4932                                                 SCTP_TCB_UNLOCK(stcb_tmp);
4933
4934                                         if (stcb->asoc.state == 0) {
4935                                                 /* the assoc was freed? */
4936                                                 return (-12);
4937                                         }
4938                                         return (-13);
4939                                 }
4940                         }
4941                 } else if (ptype == SCTP_IPV6_ADDRESS) {
4942                         if (stcb->asoc.ipv6_addr_legal) {
4943                                 /* ok get the v6 address and check/add */
4944                                 struct sctp_ipv6addr_param *p6, p6_buf;
4945
4946                                 phdr = sctp_get_next_param(m, offset,
4947                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4948                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4949                                     phdr == NULL) {
4950                                         return (-14);
4951                                 }
4952                                 p6 = (struct sctp_ipv6addr_param *)phdr;
4953                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4954                                     sizeof(p6->addr));
4955                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
4956                                         /* Skip multi-cast addresses */
4957                                         goto next_param;
4958                                 }
4959                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
4960                                         /*
4961                                          * Link local make no sense without
4962                                          * scope
4963                                          */
4964                                         goto next_param;
4965                                 }
4966                                 sa = (struct sockaddr *)&sin6;
4967                                 inp = stcb->sctp_ep;
4968                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4969                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4970                                     local_sa, stcb);
4971                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4972                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4973                                     inp == NULL)) {
4974                                         /*
4975                                          * we must validate the state again
4976                                          * here
4977                                          */
4978                                         if (stcb->asoc.state == 0) {
4979                                                 /* the assoc was freed? */
4980                                                 return (-16);
4981                                         }
4982                                         /*
4983                                          * we must add the address, no scope
4984                                          * set
4985                                          */
4986                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
4987                                                 return (-17);
4988                                         }
4989                                 } else if (stcb_tmp == stcb) {
4990                                         /*
4991                                          * we must validate the state again
4992                                          * here
4993                                          */
4994                                         if (stcb->asoc.state == 0) {
4995                                                 /* the assoc was freed? */
4996                                                 return (-19);
4997                                         }
4998                                         if (net != NULL) {
4999                                                 /* clear flag */
5000                                                 net->dest_state &=
5001                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5002                                         }
5003                                 } else {
5004                                         /*
5005                                          * strange, address is in another
5006                                          * assoc? straighten out locks.
5007                                          */
5008                                         if (stcb_tmp)
5009                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5010
5011                                         if (stcb->asoc.state == 0) {
5012                                                 /* the assoc was freed? */
5013                                                 return (-21);
5014                                         }
5015                                         return (-22);
5016                                 }
5017                         }
5018                 } else if (ptype == SCTP_ECN_CAPABLE) {
5019                         stcb->asoc.ecn_allowed = 1;
5020                 } else if (ptype == SCTP_ULP_ADAPTATION) {
5021                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
5022                                 struct sctp_adaptation_layer_indication ai,
5023                                                                 *aip;
5024
5025                                 phdr = sctp_get_next_param(m, offset,
5026                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
5027                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
5028                                 if (aip) {
5029                                         sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
5030                                             stcb, ntohl(aip->indication), NULL);
5031                                 }
5032                         }
5033                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5034                         struct sctp_asconf_addr_param lstore, *fee;
5035                         struct sctp_asconf_addrv4_param *fii;
5036                         int lptype;
5037                         struct sockaddr *lsa = NULL;
5038
5039                         stcb->asoc.peer_supports_asconf = 1;
5040                         if (plen > sizeof(lstore)) {
5041                                 return (-23);
5042                         }
5043                         phdr = sctp_get_next_param(m, offset,
5044                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5045                         if (phdr == NULL) {
5046                                 return (-24);
5047                         }
5048                         fee = (struct sctp_asconf_addr_param *)phdr;
5049                         lptype = ntohs(fee->addrp.ph.param_type);
5050                         if (lptype == SCTP_IPV4_ADDRESS) {
5051                                 if (plen !=
5052                                     sizeof(struct sctp_asconf_addrv4_param)) {
5053                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5054                                             (int)sizeof(struct sctp_asconf_addrv4_param),
5055                                             plen);
5056                                 } else {
5057                                         fii = (struct sctp_asconf_addrv4_param *)fee;
5058                                         sin.sin_addr.s_addr = fii->addrp.addr;
5059                                         lsa = (struct sockaddr *)&sin;
5060                                 }
5061                         } else if (lptype == SCTP_IPV6_ADDRESS) {
5062                                 if (plen !=
5063                                     sizeof(struct sctp_asconf_addr_param)) {
5064                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5065                                             (int)sizeof(struct sctp_asconf_addr_param),
5066                                             plen);
5067                                 } else {
5068                                         memcpy(sin6.sin6_addr.s6_addr,
5069                                             fee->addrp.addr,
5070                                             sizeof(fee->addrp.addr));
5071                                         lsa = (struct sockaddr *)&sin6;
5072                                 }
5073                         }
5074                         if (lsa) {
5075                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
5076                         }
5077                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5078                         /* Peer supports pr-sctp */
5079                         stcb->asoc.peer_supports_prsctp = 1;
5080                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5081                         /* A supported extension chunk */
5082                         struct sctp_supported_chunk_types_param *pr_supported;
5083                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5084                         int num_ent, i;
5085
5086                         phdr = sctp_get_next_param(m, offset,
5087                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5088                         if (phdr == NULL) {
5089                                 return (-25);
5090                         }
5091                         stcb->asoc.peer_supports_asconf = 0;
5092                         stcb->asoc.peer_supports_prsctp = 0;
5093                         stcb->asoc.peer_supports_pktdrop = 0;
5094                         stcb->asoc.peer_supports_strreset = 0;
5095                         stcb->asoc.peer_supports_auth = 0;
5096                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5097                         num_ent = plen - sizeof(struct sctp_paramhdr);
5098                         for (i = 0; i < num_ent; i++) {
5099                                 switch (pr_supported->chunk_types[i]) {
5100                                 case SCTP_ASCONF:
5101                                 case SCTP_ASCONF_ACK:
5102                                         stcb->asoc.peer_supports_asconf = 1;
5103                                         break;
5104                                 case SCTP_FORWARD_CUM_TSN:
5105                                         stcb->asoc.peer_supports_prsctp = 1;
5106                                         break;
5107                                 case SCTP_PACKET_DROPPED:
5108                                         stcb->asoc.peer_supports_pktdrop = 1;
5109                                         break;
5110                                 case SCTP_STREAM_RESET:
5111                                         stcb->asoc.peer_supports_strreset = 1;
5112                                         break;
5113                                 case SCTP_AUTHENTICATION:
5114                                         stcb->asoc.peer_supports_auth = 1;
5115                                         break;
5116                                 default:
5117                                         /* one I have not learned yet */
5118                                         break;
5119
5120                                 }
5121                         }
5122                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5123                         /* Peer supports ECN-nonce */
5124                         stcb->asoc.peer_supports_ecn_nonce = 1;
5125                         stcb->asoc.ecn_nonce_allowed = 1;
5126                 } else if (ptype == SCTP_RANDOM) {
5127                         if (plen > sizeof(random_store))
5128                                 break;
5129                         if (got_random) {
5130                                 /* already processed a RANDOM */
5131                                 goto next_param;
5132                         }
5133                         phdr = sctp_get_next_param(m, offset,
5134                             (struct sctp_paramhdr *)random_store,
5135                             min(sizeof(random_store), plen));
5136                         if (phdr == NULL)
5137                                 return (-26);
5138                         p_random = (struct sctp_auth_random *)phdr;
5139                         random_len = plen - sizeof(*p_random);
5140                         /* enforce the random length */
5141                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5142                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5143                                 return (-27);
5144                         }
5145                         got_random = 1;
5146                 } else if (ptype == SCTP_HMAC_LIST) {
5147                         int num_hmacs;
5148                         int i;
5149
5150                         if (plen > sizeof(hmacs_store))
5151                                 break;
5152                         if (got_hmacs) {
5153                                 /* already processed a HMAC list */
5154                                 goto next_param;
5155                         }
5156                         phdr = sctp_get_next_param(m, offset,
5157                             (struct sctp_paramhdr *)hmacs_store,
5158                             min(plen, sizeof(hmacs_store)));
5159                         if (phdr == NULL)
5160                                 return (-28);
5161                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
5162                         hmacs_len = plen - sizeof(*hmacs);
5163                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5164                         /* validate the hmac list */
5165                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5166                                 return (-29);
5167                         }
5168                         if (stcb->asoc.peer_hmacs != NULL)
5169                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5170                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5171                         if (stcb->asoc.peer_hmacs != NULL) {
5172                                 for (i = 0; i < num_hmacs; i++) {
5173                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5174                                             ntohs(hmacs->hmac_ids[i]));
5175                                 }
5176                         }
5177                         got_hmacs = 1;
5178                 } else if (ptype == SCTP_CHUNK_LIST) {
5179                         int i;
5180
5181                         if (plen > sizeof(chunks_store))
5182                                 break;
5183                         if (got_chklist) {
5184                                 /* already processed a Chunks list */
5185                                 goto next_param;
5186                         }
5187                         phdr = sctp_get_next_param(m, offset,
5188                             (struct sctp_paramhdr *)chunks_store,
5189                             min(plen, sizeof(chunks_store)));
5190                         if (phdr == NULL)
5191                                 return (-30);
5192                         chunks = (struct sctp_auth_chunk_list *)phdr;
5193                         num_chunks = plen - sizeof(*chunks);
5194                         if (stcb->asoc.peer_auth_chunks != NULL)
5195                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5196                         else
5197                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5198                         for (i = 0; i < num_chunks; i++) {
5199                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5200                                     stcb->asoc.peer_auth_chunks);
5201                         }
5202                         got_chklist = 1;
5203                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5204                             (ptype == SCTP_STATE_COOKIE) ||
5205                             (ptype == SCTP_UNRECOG_PARAM) ||
5206                             (ptype == SCTP_COOKIE_PRESERVE) ||
5207                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5208                             (ptype == SCTP_ADD_IP_ADDRESS) ||
5209                             (ptype == SCTP_DEL_IP_ADDRESS) ||
5210                             (ptype == SCTP_ERROR_CAUSE_IND) ||
5211                     (ptype == SCTP_SUCCESS_REPORT)) {
5212                          /* don't care */ ;
5213                 } else {
5214                         if ((ptype & 0x8000) == 0x0000) {
5215                                 /*
5216                                  * must stop processing the rest of the
5217                                  * param's. Any report bits were handled
5218                                  * with the call to
5219                                  * sctp_arethere_unrecognized_parameters()
5220                                  * when the INIT or INIT-ACK was first seen.
5221                                  */
5222                                 break;
5223                         }
5224                 }
5225 next_param:
5226                 offset += SCTP_SIZE32(plen);
5227                 if (offset >= limit) {
5228                         break;
5229                 }
5230                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5231                     sizeof(parm_buf));
5232         }
5233         /* Now check to see if we need to purge any addresses */
5234         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5235                 net_tmp = TAILQ_NEXT(net, sctp_next);
5236                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5237                     SCTP_ADDR_NOT_IN_ASSOC) {
5238                         /* This address has been removed from the asoc */
5239                         /* remove and free it */
5240                         stcb->asoc.numnets--;
5241                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5242                         sctp_free_remote_addr(net);
5243                         if (net == stcb->asoc.primary_destination) {
5244                                 stcb->asoc.primary_destination = NULL;
5245                                 sctp_select_primary_destination(stcb);
5246                         }
5247                 }
5248         }
5249         /* validate authentication required parameters */
5250         if (got_random && got_hmacs) {
5251                 stcb->asoc.peer_supports_auth = 1;
5252         } else {
5253                 stcb->asoc.peer_supports_auth = 0;
5254         }
5255         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5256                 /* peer does not support auth but sent a chunks list? */
5257                 return (-31);
5258         }
5259         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5260             !stcb->asoc.peer_supports_auth) {
5261                 /* peer supports asconf but not auth? */
5262                 return (-32);
5263         }
5264         /* concatenate the full random key */
5265 #ifdef SCTP_AUTH_DRAFT_04
5266         keylen = random_len;
5267         new_key = sctp_alloc_key(keylen);
5268         if (new_key != NULL) {
5269                 /* copy in the RANDOM */
5270                 if (p_random != NULL)
5271                         bcopy(p_random->random_data, new_key->key, random_len);
5272         }
5273 #else
5274         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5275             sizeof(*hmacs) + hmacs_len;
5276         new_key = sctp_alloc_key(keylen);
5277         if (new_key != NULL) {
5278                 /* copy in the RANDOM */
5279                 if (p_random != NULL) {
5280                         keylen = sizeof(*p_random) + random_len;
5281                         bcopy(p_random, new_key->key, keylen);
5282                 }
5283                 /* append in the AUTH chunks */
5284                 if (chunks != NULL) {
5285                         bcopy(chunks, new_key->key + keylen,
5286                             sizeof(*chunks) + num_chunks);
5287                         keylen += sizeof(*chunks) + num_chunks;
5288                 }
5289                 /* append in the HMACs */
5290                 if (hmacs != NULL) {
5291                         bcopy(hmacs, new_key->key + keylen,
5292                             sizeof(*hmacs) + hmacs_len);
5293                 }
5294         }
5295 #endif
5296         else {
5297                 /* failed to get memory for the key */
5298                 return (-33);
5299         }
5300         if (stcb->asoc.authinfo.peer_random != NULL)
5301                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5302         stcb->asoc.authinfo.peer_random = new_key;
5303 #ifdef SCTP_AUTH_DRAFT_04
5304         /* don't include the chunks and hmacs for draft -04 */
5305         stcb->asoc.authinfo.peer_random->keylen = random_len;
5306 #endif
5307         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5308         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5309
5310         return (0);
5311 }
5312
5313 int
5314 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5315     struct sctp_nets *net)
5316 {
5317         /* make sure the requested primary address exists in the assoc */
5318         if (net == NULL && sa)
5319                 net = sctp_findnet(stcb, sa);
5320
5321         if (net == NULL) {
5322                 /* didn't find the requested primary address! */
5323                 return (-1);
5324         } else {
5325                 /* set the primary address */
5326                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5327                         /* Must be confirmed, so queue to set */
5328                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5329                         return (0);
5330                 }
5331                 stcb->asoc.primary_destination = net;
5332                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5333                 net = TAILQ_FIRST(&stcb->asoc.nets);
5334                 if (net != stcb->asoc.primary_destination) {
5335                         /*
5336                          * first one on the list is NOT the primary
5337                          * sctp_cmpaddr() is much more efficent if the
5338                          * primary is the first on the list, make it so.
5339                          */
5340                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5341                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5342                 }
5343                 return (0);
5344         }
5345 }
5346
5347
5348 int
5349 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
5350 {
5351         /*
5352          * This function serves two purposes. It will see if a TAG can be
5353          * re-used and return 1 for yes it is ok and 0 for don't use that
5354          * tag. A secondary function it will do is purge out old tags that
5355          * can be removed.
5356          */
5357         struct sctpasochead *head;
5358         struct sctpvtaghead *chain;
5359         struct sctp_tagblock *twait_block;
5360         struct sctp_tcb *stcb;
5361         int i;
5362
5363         SCTP_INP_INFO_WLOCK();
5364         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5365         /* First is the vtag in use ? */
5366
5367         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5368             sctppcbinfo.hashasocmark)];
5369         if (head == NULL) {
5370                 goto check_restart;
5371         }
5372         LIST_FOREACH(stcb, head, sctp_asocs) {
5373
5374                 if (stcb->asoc.my_vtag == tag) {
5375                         /*
5376                          * We should remove this if and return 0 always if
5377                          * we want vtags unique across all endpoints. For
5378                          * now within a endpoint is ok.
5379                          */
5380                         if (inp == stcb->sctp_ep) {
5381                                 /* bad tag, in use */
5382                                 SCTP_INP_INFO_WUNLOCK();
5383                                 return (0);
5384                         }
5385                 }
5386         }
5387 check_restart:
5388         /* Now lets check the restart hash */
5389         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5390             sctppcbinfo.hashrestartmark)];
5391         if (head == NULL) {
5392                 goto check_time_wait;
5393         }
5394         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5395                 if (stcb->asoc.assoc_id == tag) {
5396                         /* candidate */
5397                         if (inp == stcb->sctp_ep) {
5398                                 /* bad tag, in use */
5399                                 SCTP_INP_INFO_WUNLOCK();
5400                                 return (0);
5401                         }
5402                 }
5403         }
5404 check_time_wait:
5405         /* Now what about timed wait ? */
5406         if (!SCTP_LIST_EMPTY(chain)) {
5407                 /*
5408                  * Block(s) are present, lets see if we have this tag in the
5409                  * list
5410                  */
5411                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5412                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5413                                 if (twait_block->vtag_block[i].v_tag == 0) {
5414                                         /* not used */
5415                                         continue;
5416                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
5417                                     now->tv_sec) {
5418                                         /* Audit expires this guy */
5419                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
5420                                         twait_block->vtag_block[i].v_tag = 0;
5421                                 } else if (twait_block->vtag_block[i].v_tag ==
5422                                     tag) {
5423                                         /* Bad tag, sorry :< */
5424                                         SCTP_INP_INFO_WUNLOCK();
5425                                         return (0);
5426                                 }
5427                         }
5428                 }
5429         }
5430         /* Not found, ok to use the tag */
5431         SCTP_INP_INFO_WUNLOCK();
5432         return (1);
5433 }
5434
5435
5436 static sctp_assoc_t reneged_asoc_ids[256];
5437 static uint8_t reneged_at = 0;
5438
5439
5440 static void
5441 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5442 {
5443         /*
5444          * We must hunt this association for MBUF's past the cumack (i.e.
5445          * out of order data that we can renege on).
5446          */
5447         struct sctp_association *asoc;
5448         struct sctp_tmit_chunk *chk, *nchk;
5449         uint32_t cumulative_tsn_p1, tsn;
5450         struct sctp_queued_to_read *ctl, *nctl;
5451         int cnt, strmat, gap;
5452
5453         /* We look for anything larger than the cum-ack + 1 */
5454
5455         SCTP_STAT_INCR(sctps_protocol_drain_calls);
5456         if (sctp_do_drain == 0) {
5457                 return;
5458         }
5459         asoc = &stcb->asoc;
5460         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5461                 /* none we can reneg on. */
5462                 return;
5463         }
5464         SCTP_STAT_INCR(sctps_protocol_drains_done);
5465         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5466         cnt = 0;
5467         /* First look in the re-assembly queue */
5468         chk = TAILQ_FIRST(&asoc->reasmqueue);
5469         while (chk) {
5470                 /* Get the next one */
5471                 nchk = TAILQ_NEXT(chk, sctp_next);
5472                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5473                     cumulative_tsn_p1, MAX_TSN)) {
5474                         /* Yep it is above cum-ack */
5475                         cnt++;
5476                         tsn = chk->rec.data.TSN_seq;
5477                         if (tsn >= asoc->mapping_array_base_tsn) {
5478                                 gap = tsn - asoc->mapping_array_base_tsn;
5479                         } else {
5480                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5481                                     tsn + 1;
5482                         }
5483                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5484                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5485                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5486                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5487                         if (chk->data) {
5488                                 sctp_m_freem(chk->data);
5489                                 chk->data = NULL;
5490                         }
5491                         sctp_free_a_chunk(stcb, chk);
5492                 }
5493                 chk = nchk;
5494         }
5495         /* Ok that was fun, now we will drain all the inbound streams? */
5496         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5497                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5498                 while (ctl) {
5499                         nctl = TAILQ_NEXT(ctl, next);
5500                         if (compare_with_wrap(ctl->sinfo_tsn,
5501                             cumulative_tsn_p1, MAX_TSN)) {
5502                                 /* Yep it is above cum-ack */
5503                                 cnt++;
5504                                 tsn = ctl->sinfo_tsn;
5505                                 if (tsn >= asoc->mapping_array_base_tsn) {
5506                                         gap = tsn -
5507                                             asoc->mapping_array_base_tsn;
5508                                 } else {
5509                                         gap = (MAX_TSN -
5510                                             asoc->mapping_array_base_tsn) +
5511                                             tsn + 1;
5512                                 }
5513                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5514                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5515
5516                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5517                                     gap);
5518                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5519                                     ctl, next);
5520                                 if (ctl->data) {
5521                                         sctp_m_freem(ctl->data);
5522                                         ctl->data = NULL;
5523                                 }
5524                                 sctp_free_remote_addr(ctl->whoFrom);
5525                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5526                                 SCTP_DECR_READQ_COUNT();
5527                         }
5528                         ctl = nctl;
5529                 }
5530         }
5531         /*
5532          * Question, should we go through the delivery queue? The only
5533          * reason things are on here is the app not reading OR a p-d-api up.
5534          * An attacker COULD send enough in to initiate the PD-API and then
5535          * send a bunch of stuff to other streams... these would wind up on
5536          * the delivery queue.. and then we would not get to them. But in
5537          * order to do this I then have to back-track and un-deliver
5538          * sequence numbers in streams.. el-yucko. I think for now we will
5539          * NOT look at the delivery queue and leave it to be something to
5540          * consider later. An alternative would be to abort the P-D-API with
5541          * a notification and then deliver the data.... Or another method
5542          * might be to keep track of how many times the situation occurs and
5543          * if we see a possible attack underway just abort the association.
5544          */
5545 #ifdef SCTP_DEBUG
5546         if (cnt) {
5547                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
5548         }
5549 #endif
5550         if (cnt) {
5551                 /*
5552                  * Now do we need to find a new
5553                  * asoc->highest_tsn_inside_map?
5554                  */
5555                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
5556                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
5557                 } else {
5558                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5559                             asoc->highest_tsn_inside_map + 1;
5560                 }
5561                 if (gap >= (asoc->mapping_array_size << 3)) {
5562                         /*
5563                          * Something bad happened or cum-ack and high were
5564                          * behind the base, but if so earlier checks should
5565                          * have found NO data... wierd... we will start at
5566                          * end of mapping array.
5567                          */
5568                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
5569                             (int)gap,
5570                             (int)(asoc->mapping_array_size << 3),
5571                             (int)asoc->highest_tsn_inside_map);
5572                         gap = asoc->mapping_array_size << 3;
5573                 }
5574                 while (gap > 0) {
5575                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
5576                                 /* found the new highest */
5577                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
5578                                 break;
5579                         }
5580                         gap--;
5581                 }
5582                 if (gap == 0) {
5583                         /* Nothing left in map */
5584                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
5585                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
5586                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
5587                 }
5588                 asoc->last_revoke_count = cnt;
5589                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
5590                 sctp_send_sack(stcb);
5591                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN);
5592                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
5593                 reneged_at++;
5594         }
5595         /*
5596          * Another issue, in un-setting the TSN's in the mapping array we
5597          * DID NOT adjust the higest_tsn marker.  This will cause one of two
5598          * things to occur. It may cause us to do extra work in checking for
5599          * our mapping array movement. More importantly it may cause us to
5600          * SACK every datagram. This may not be a bad thing though since we
5601          * will recover once we get our cum-ack above and all this stuff we
5602          * dumped recovered.
5603          */
5604 }
5605
5606 void
5607 sctp_drain()
5608 {
5609         /*
5610          * We must walk the PCB lists for ALL associations here. The system
5611          * is LOW on MBUF's and needs help. This is where reneging will
5612          * occur. We really hope this does NOT happen!
5613          */
5614         struct sctp_inpcb *inp;
5615         struct sctp_tcb *stcb;
5616
5617         SCTP_INP_INFO_RLOCK();
5618         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
5619                 /* For each endpoint */
5620                 SCTP_INP_RLOCK(inp);
5621                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5622                         /* For each association */
5623                         SCTP_TCB_LOCK(stcb);
5624                         sctp_drain_mbufs(inp, stcb);
5625                         SCTP_TCB_UNLOCK(stcb);
5626                 }
5627                 SCTP_INP_RUNLOCK(inp);
5628         }
5629         SCTP_INP_INFO_RUNLOCK();
5630 }
5631
5632 /*
5633  * start a new iterator
5634  * iterates through all endpoints and associations based on the pcb_state
5635  * flags and asoc_state.  "af" (mandatory) is executed for all matching
5636  * assocs and "ef" (optional) is executed when the iterator completes.
5637  * "inpf" (optional) is executed for each new endpoint as it is being
5638  * iterated through. inpe (optional) is called when the inp completes
5639  * its way through all the stcbs.
5640  */
5641 int
5642 sctp_initiate_iterator(inp_func inpf,
5643     asoc_func af,
5644     inp_func inpe,
5645     uint32_t pcb_state,
5646     uint32_t pcb_features,
5647     uint32_t asoc_state,
5648     void *argp,
5649     uint32_t argi,
5650     end_func ef,
5651     struct sctp_inpcb *s_inp,
5652     uint8_t chunk_output_off)
5653 {
5654         struct sctp_iterator *it = NULL;
5655
5656         if (af == NULL) {
5657                 return (-1);
5658         }
5659         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
5660             SCTP_M_ITER);
5661         if (it == NULL) {
5662                 return (ENOMEM);
5663         }
5664         memset(it, 0, sizeof(*it));
5665         it->function_assoc = af;
5666         it->function_inp = inpf;
5667         if (inpf)
5668                 it->done_current_ep = 0;
5669         else
5670                 it->done_current_ep = 1;
5671         it->function_atend = ef;
5672         it->pointer = argp;
5673         it->val = argi;
5674         it->pcb_flags = pcb_state;
5675         it->pcb_features = pcb_features;
5676         it->asoc_state = asoc_state;
5677         it->function_inp_end = inpe;
5678         it->no_chunk_output = chunk_output_off;
5679         if (s_inp) {
5680                 it->inp = s_inp;
5681                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5682         } else {
5683                 SCTP_INP_INFO_RLOCK();
5684                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5685
5686                 SCTP_INP_INFO_RUNLOCK();
5687                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5688
5689         }
5690         SCTP_IPI_ITERATOR_WQ_LOCK();
5691         if (it->inp) {
5692                 SCTP_INP_INCR_REF(it->inp);
5693         }
5694         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5695 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5696         if (sctppcbinfo.iterator_running == 0) {
5697                 sctp_wakeup_iterator();
5698         }
5699         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5700 #else
5701         if (it->inp)
5702                 SCTP_INP_DECR_REF(it->inp);
5703         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5704         /* Init the timer */
5705         SCTP_OS_TIMER_INIT(&it->tmr.timer);
5706         /* add to the list of all iterators */
5707         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
5708             NULL, NULL);
5709 #endif
5710         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
5711         return (0);
5712 }