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 /* sctp_ifap is used to bypass normal local address validation checks */
2127 int
2128 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2129     struct sctp_ifa *sctp_ifap, struct thread *p)
2130 {
2131         /* bind a ep to a socket address */
2132         struct sctppcbhead *head;
2133         struct sctp_inpcb *inp, *inp_tmp;
2134         struct inpcb *ip_inp;
2135         int bindall;
2136         int prison = 0;
2137         uint16_t lport;
2138         int error;
2139         uint32_t vrf_id;
2140
2141         lport = 0;
2142         error = 0;
2143         bindall = 1;
2144         inp = (struct sctp_inpcb *)so->so_pcb;
2145         ip_inp = (struct inpcb *)so->so_pcb;
2146 #ifdef SCTP_DEBUG
2147         if (addr) {
2148                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2149                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2150                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2151                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2152         }
2153 #endif
2154         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2155                 /* already did a bind, subsequent binds NOT allowed ! */
2156                 return (EINVAL);
2157         }
2158 #ifdef INVARIANTS
2159         if (p == NULL)
2160                 panic("null proc/thread");
2161 #endif
2162         if (p && jailed(p->td_ucred)) {
2163                 prison = 1;
2164         }
2165         if (addr != NULL) {
2166                 if (addr->sa_family == AF_INET) {
2167                         struct sockaddr_in *sin;
2168
2169                         /* IPV6_V6ONLY socket? */
2170                         if (SCTP_IPV6_V6ONLY(ip_inp)) {
2171                                 return (EINVAL);
2172                         }
2173                         if (addr->sa_len != sizeof(*sin))
2174                                 return (EINVAL);
2175
2176                         sin = (struct sockaddr_in *)addr;
2177                         lport = sin->sin_port;
2178                         if (prison) {
2179                                 /*
2180                                  * For INADDR_ANY and  LOOPBACK the
2181                                  * prison_ip() call will tranmute the ip
2182                                  * address to the proper valie.
2183                                  */
2184                                 if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr))
2185                                         return (EINVAL);
2186                         }
2187                         if (sin->sin_addr.s_addr != INADDR_ANY) {
2188                                 bindall = 0;
2189                         }
2190                 } else if (addr->sa_family == AF_INET6) {
2191                         /* Only for pure IPv6 Address. (No IPv4 Mapped!) */
2192                         struct sockaddr_in6 *sin6;
2193
2194                         sin6 = (struct sockaddr_in6 *)addr;
2195
2196                         if (addr->sa_len != sizeof(*sin6))
2197                                 return (EINVAL);
2198
2199                         lport = sin6->sin6_port;
2200                         /*
2201                          * Jail checks for IPv6 should go HERE! i.e. add the
2202                          * prison_ip() equivilant in this postion to
2203                          * transmute the addresses to the proper one jailed.
2204                          */
2205                         if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2206                                 bindall = 0;
2207                                 /* KAME hack: embed scopeid */
2208                                 if (sa6_embedscope(sin6, ip6_use_defzone) != 0)
2209                                         return (EINVAL);
2210                         }
2211                         /* this must be cleared for ifa_ifwithaddr() */
2212                         sin6->sin6_scope_id = 0;
2213                 } else {
2214                         return (EAFNOSUPPORT);
2215                 }
2216         }
2217         /* Setup a vrf_id to be the default for the non-bind-all case. */
2218         vrf_id = inp->def_vrf_id;
2219
2220         SCTP_INP_INFO_WLOCK();
2221         SCTP_INP_WLOCK(inp);
2222         /* increase our count due to the unlock we do */
2223         SCTP_INP_INCR_REF(inp);
2224         if (lport) {
2225                 /*
2226                  * Did the caller specify a port? if so we must see if a ep
2227                  * already has this one bound.
2228                  */
2229                 /* got to be root to get at low ports */
2230                 if (ntohs(lport) < IPPORT_RESERVED) {
2231                         if (p && (error =
2232                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2233                             )) {
2234                                 SCTP_INP_DECR_REF(inp);
2235                                 SCTP_INP_WUNLOCK(inp);
2236                                 SCTP_INP_INFO_WUNLOCK();
2237                                 return (error);
2238                         }
2239                 }
2240                 if (p == NULL) {
2241                         SCTP_INP_DECR_REF(inp);
2242                         SCTP_INP_WUNLOCK(inp);
2243                         SCTP_INP_INFO_WUNLOCK();
2244                         return (error);
2245                 }
2246                 SCTP_INP_WUNLOCK(inp);
2247                 if (bindall) {
2248                         vrf_id = inp->def_vrf_id;
2249                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2250                         if (inp_tmp != NULL) {
2251                                 /*
2252                                  * lock guy returned and lower count note
2253                                  * that we are not bound so inp_tmp should
2254                                  * NEVER be inp. And it is this inp
2255                                  * (inp_tmp) that gets the reference bump,
2256                                  * so we must lower it.
2257                                  */
2258                                 SCTP_INP_DECR_REF(inp_tmp);
2259                                 SCTP_INP_DECR_REF(inp);
2260                                 /* unlock info */
2261                                 SCTP_INP_INFO_WUNLOCK();
2262                                 return (EADDRINUSE);
2263                         }
2264                 } else {
2265                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2266                         if (inp_tmp != NULL) {
2267                                 /*
2268                                  * lock guy returned and lower count note
2269                                  * that we are not bound so inp_tmp should
2270                                  * NEVER be inp. And it is this inp
2271                                  * (inp_tmp) that gets the reference bump,
2272                                  * so we must lower it.
2273                                  */
2274                                 SCTP_INP_DECR_REF(inp_tmp);
2275                                 SCTP_INP_DECR_REF(inp);
2276                                 /* unlock info */
2277                                 SCTP_INP_INFO_WUNLOCK();
2278                                 return (EADDRINUSE);
2279                         }
2280                 }
2281                 SCTP_INP_WLOCK(inp);
2282                 if (bindall) {
2283                         /* verify that no lport is not used by a singleton */
2284                         if (sctp_isport_inuse(inp, lport, vrf_id)) {
2285                                 /* Sorry someone already has this one bound */
2286                                 SCTP_INP_DECR_REF(inp);
2287                                 SCTP_INP_WUNLOCK(inp);
2288                                 SCTP_INP_INFO_WUNLOCK();
2289                                 return (EADDRINUSE);
2290                         }
2291                 }
2292         } else {
2293                 uint16_t first, last, candidate;
2294                 uint16_t count;
2295                 int done;
2296
2297                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2298                         first = ipport_hifirstauto;
2299                         last = ipport_hilastauto;
2300                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2301                         if (p && (error =
2302                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2303                             )) {
2304                                 SCTP_INP_DECR_REF(inp);
2305                                 SCTP_INP_WUNLOCK(inp);
2306                                 SCTP_INP_INFO_WUNLOCK();
2307                                 return (error);
2308                         }
2309                         first = ipport_lowfirstauto;
2310                         last = ipport_lowlastauto;
2311                 } else {
2312                         first = ipport_firstauto;
2313                         last = ipport_lastauto;
2314                 }
2315                 if (first > last) {
2316                         uint16_t temp;
2317
2318                         temp = first;
2319                         first = last;
2320                         last = temp;
2321                 }
2322                 count = last - first + 1;       /* number of candidates */
2323                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2324
2325                 done = 0;
2326                 while (!done) {
2327                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
2328                                 done = 1;
2329                         }
2330                         if (!done) {
2331                                 if (--count == 0) {
2332                                         SCTP_INP_DECR_REF(inp);
2333                                         SCTP_INP_WUNLOCK(inp);
2334                                         SCTP_INP_INFO_WUNLOCK();
2335                                         return (EADDRINUSE);
2336                                 }
2337                                 if (candidate == last)
2338                                         candidate = first;
2339                                 else
2340                                         candidate = candidate + 1;
2341                         }
2342                 }
2343                 lport = htons(candidate);
2344         }
2345         SCTP_INP_DECR_REF(inp);
2346         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2347             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2348                 /*
2349                  * this really should not happen. The guy did a non-blocking
2350                  * bind and then did a close at the same time.
2351                  */
2352                 SCTP_INP_WUNLOCK(inp);
2353                 SCTP_INP_INFO_WUNLOCK();
2354                 return (EINVAL);
2355         }
2356         /* ok we look clear to give out this port, so lets setup the binding */
2357         if (bindall) {
2358                 /* binding to all addresses, so just set in the proper flags */
2359                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2360                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2361                 /* set the automatic addr changes from kernel flag */
2362                 if (sctp_auto_asconf == 0) {
2363                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2364                 } else {
2365                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2366                 }
2367         } else {
2368                 /*
2369                  * bind specific, make sure flags is off and add a new
2370                  * address structure to the sctp_addr_list inside the ep
2371                  * structure.
2372                  *
2373                  * We will need to allocate one and insert it at the head. The
2374                  * socketopt call can just insert new addresses in there as
2375                  * well. It will also have to do the embed scope kame hack
2376                  * too (before adding).
2377                  */
2378                 struct sctp_ifa *ifa;
2379                 struct sockaddr_storage store_sa;
2380
2381                 memset(&store_sa, 0, sizeof(store_sa));
2382                 if (addr->sa_family == AF_INET) {
2383                         struct sockaddr_in *sin;
2384
2385                         sin = (struct sockaddr_in *)&store_sa;
2386                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2387                         sin->sin_port = 0;
2388                 } else if (addr->sa_family == AF_INET6) {
2389                         struct sockaddr_in6 *sin6;
2390
2391                         sin6 = (struct sockaddr_in6 *)&store_sa;
2392                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2393                         sin6->sin6_port = 0;
2394                 }
2395                 /*
2396                  * first find the interface with the bound address need to
2397                  * zero out the port to find the address! yuck! can't do
2398                  * this earlier since need port for sctp_pcb_findep()
2399                  */
2400                 if (sctp_ifap != NULL)
2401                         ifa = sctp_ifap;
2402                 else {
2403                         /*
2404                          * Note for BSD we hit here always other O/S's will
2405                          * pass things in via the sctp_ifap argument
2406                          * (Panda).
2407                          */
2408                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2409                             vrf_id, 0);
2410                 }
2411                 if (ifa == NULL) {
2412                         /* Can't find an interface with that address */
2413                         SCTP_INP_WUNLOCK(inp);
2414                         SCTP_INP_INFO_WUNLOCK();
2415                         return (EADDRNOTAVAIL);
2416                 }
2417                 if (addr->sa_family == AF_INET6) {
2418                         /* GAK, more FIXME IFA lock? */
2419                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2420                                 /* Can't bind a non-existent addr. */
2421                                 SCTP_INP_WUNLOCK(inp);
2422                                 SCTP_INP_INFO_WUNLOCK();
2423                                 return (EINVAL);
2424                         }
2425                 }
2426                 /* we're not bound all */
2427                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2428                 /* allow bindx() to send ASCONF's for binding changes */
2429                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2430                 /* clear automatic addr changes from kernel flag */
2431                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2432
2433                 /* add this address to the endpoint list */
2434                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2435                 if (error != 0) {
2436                         SCTP_INP_WUNLOCK(inp);
2437                         SCTP_INP_INFO_WUNLOCK();
2438                         return (error);
2439                 }
2440                 inp->laddr_count++;
2441         }
2442         /* find the bucket */
2443         head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
2444             sctppcbinfo.hashmark)];
2445         /* put it in the bucket */
2446         LIST_INSERT_HEAD(head, inp, sctp_hash);
2447         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
2448             head, ntohs(lport));
2449         /* set in the port */
2450         inp->sctp_lport = lport;
2451
2452         /* turn off just the unbound flag */
2453         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2454         SCTP_INP_WUNLOCK(inp);
2455         SCTP_INP_INFO_WUNLOCK();
2456         return (0);
2457 }
2458
2459
2460 static void
2461 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
2462 {
2463         struct sctp_iterator *it;
2464
2465         /*
2466          * We enter with the only the ITERATOR_LOCK in place and a write
2467          * lock on the inp_info stuff.
2468          */
2469
2470         /*
2471          * Go through all iterators, we must do this since it is possible
2472          * that some iterator does NOT have the lock, but is waiting for it.
2473          * And the one that had the lock has either moved in the last
2474          * iteration or we just cleared it above. We need to find all of
2475          * those guys. The list of iterators should never be very big
2476          * though.
2477          */
2478         TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
2479                 if (it == inp->inp_starting_point_for_iterator)
2480                         /* skip this guy, he's special */
2481                         continue;
2482                 if (it->inp == inp) {
2483                         /*
2484                          * This is tricky and we DON'T lock the iterator.
2485                          * Reason is he's running but waiting for me since
2486                          * inp->inp_starting_point_for_iterator has the lock
2487                          * on me (the guy above we skipped). This tells us
2488                          * its is not running but waiting for
2489                          * inp->inp_starting_point_for_iterator to be
2490                          * released by the guy that does have our INP in a
2491                          * lock.
2492                          */
2493                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2494                                 it->inp = NULL;
2495                                 it->stcb = NULL;
2496                         } else {
2497                                 /* set him up to do the next guy not me */
2498                                 it->inp = inp_next;
2499                                 it->stcb = NULL;
2500                         }
2501                 }
2502         }
2503         it = inp->inp_starting_point_for_iterator;
2504         if (it) {
2505                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
2506                         it->inp = NULL;
2507                 } else {
2508                         it->inp = inp_next;
2509                 }
2510                 it->stcb = NULL;
2511         }
2512 }
2513
2514 /* release sctp_inpcb unbind the port */
2515 void
2516 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
2517 {
2518         /*
2519          * Here we free a endpoint. We must find it (if it is in the Hash
2520          * table) and remove it from there. Then we must also find it in the
2521          * overall list and remove it from there. After all removals are
2522          * complete then any timer has to be stopped. Then start the actual
2523          * freeing. a) Any local lists. b) Any associations. c) The hash of
2524          * all associations. d) finally the ep itself.
2525          */
2526         struct sctp_pcb *m;
2527         struct sctp_inpcb *inp_save;
2528         struct sctp_tcb *asoc, *nasoc;
2529         struct sctp_laddr *laddr, *nladdr;
2530         struct inpcb *ip_pcb;
2531         struct socket *so;
2532
2533         struct sctp_queued_to_read *sq;
2534
2535
2536         int cnt;
2537         sctp_sharedkey_t *shared_key;
2538
2539
2540 #ifdef SCTP_LOG_CLOSING
2541         sctp_log_closing(inp, NULL, 0);
2542 #endif
2543
2544         SCTP_ITERATOR_LOCK();
2545         so = inp->sctp_socket;
2546         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2547                 /* been here before.. eeks.. get out of here */
2548                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
2549                 SCTP_ITERATOR_UNLOCK();
2550 #ifdef SCTP_LOG_CLOSING
2551                 sctp_log_closing(inp, NULL, 1);
2552 #endif
2553                 return;
2554         }
2555         SCTP_ASOC_CREATE_LOCK(inp);
2556         SCTP_INP_INFO_WLOCK();
2557
2558         SCTP_INP_WLOCK(inp);
2559         /* First time through we have the socket lock, after that no more. */
2560         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
2561                 /*
2562                  * Once we are in we can remove the flag from = 1 is only
2563                  * passed from the actual closing routines that are called
2564                  * via the sockets layer.
2565                  */
2566                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
2567         }
2568         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
2569             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
2570
2571         if (inp->control) {
2572                 sctp_m_freem(inp->control);
2573                 inp->control = NULL;
2574         }
2575         if (inp->pkt) {
2576                 sctp_m_freem(inp->pkt);
2577                 inp->pkt = NULL;
2578         }
2579         m = &inp->sctp_ep;
2580         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
2581                                          * here but I will be nice :> (i.e.
2582                                          * ip_pcb = ep;) */
2583         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
2584                 int cnt_in_sd;
2585
2586                 cnt_in_sd = 0;
2587                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2588                     asoc = nasoc) {
2589                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
2590                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2591                                 /* Skip guys being freed */
2592                                 asoc->sctp_socket = NULL;
2593                                 cnt_in_sd++;
2594                                 continue;
2595                         }
2596                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
2597                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
2598                                 /*
2599                                  * If we have data in queue, we don't want
2600                                  * to just free since the app may have done,
2601                                  * send()/close or connect/send/close. And
2602                                  * it wants the data to get across first.
2603                                  */
2604                                 if (asoc->asoc.total_output_queue_size == 0) {
2605                                         /*
2606                                          * Just abandon things in the front
2607                                          * states
2608                                          */
2609                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2);
2610                                         continue;
2611                                 }
2612                         }
2613                         SCTP_TCB_LOCK(asoc);
2614                         /* Disconnect the socket please */
2615                         asoc->sctp_socket = NULL;
2616                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
2617                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
2618                             (asoc->asoc.control_pdapi) ||
2619                             (asoc->asoc.size_on_all_streams > 0) ||
2620                             (so && (so->so_rcv.sb_cc > 0))
2621                             ) {
2622                                 /* Left with Data unread */
2623                                 struct mbuf *op_err;
2624
2625                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2626                                     0, M_DONTWAIT, 1, MT_DATA);
2627                                 if (op_err) {
2628                                         /* Fill in the user initiated abort */
2629                                         struct sctp_paramhdr *ph;
2630                                         uint32_t *ippp;
2631
2632                                         SCTP_BUF_LEN(op_err) =
2633                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
2634                                         ph = mtod(op_err,
2635                                             struct sctp_paramhdr *);
2636                                         ph->param_type = htons(
2637                                             SCTP_CAUSE_USER_INITIATED_ABT);
2638                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
2639                                         ippp = (uint32_t *) (ph + 1);
2640                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
2641                                 }
2642                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
2643                                 sctp_send_abort_tcb(asoc, op_err);
2644                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2645                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2646                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2647                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2648                                 }
2649                                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4);
2650                                 continue;
2651                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2652                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2653                                     (asoc->asoc.stream_queue_cnt == 0)
2654                             ) {
2655                                 if (asoc->asoc.locked_on_sending) {
2656                                         goto abort_anyway;
2657                                 }
2658                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
2659                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
2660                                         /*
2661                                          * there is nothing queued to send,
2662                                          * so I send shutdown
2663                                          */
2664                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
2665                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2666                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2667                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2668                                         }
2669                                         asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT;
2670                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
2671                                             asoc->asoc.primary_destination);
2672                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2673                                             asoc->asoc.primary_destination);
2674                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR);
2675                                 }
2676                         } else {
2677                                 /* mark into shutdown pending */
2678                                 struct sctp_stream_queue_pending *sp;
2679
2680                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
2681                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
2682                                     asoc->asoc.primary_destination);
2683                                 if (asoc->asoc.locked_on_sending) {
2684                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
2685                                             sctp_streamhead);
2686                                         if (sp == NULL) {
2687                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
2688                                                     asoc->asoc.locked_on_sending,
2689                                                     asoc->asoc.locked_on_sending->stream_no);
2690                                         } else {
2691                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
2692                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
2693                                         }
2694                                 }
2695                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
2696                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
2697                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
2698                                         struct mbuf *op_err;
2699
2700                         abort_anyway:
2701                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2702                                             0, M_DONTWAIT, 1, MT_DATA);
2703                                         if (op_err) {
2704                                                 /*
2705                                                  * Fill in the user
2706                                                  * initiated abort
2707                                                  */
2708                                                 struct sctp_paramhdr *ph;
2709                                                 uint32_t *ippp;
2710
2711                                                 SCTP_BUF_LEN(op_err) =
2712                                                     (sizeof(struct sctp_paramhdr) +
2713                                                     sizeof(uint32_t));
2714                                                 ph = mtod(op_err,
2715                                                     struct sctp_paramhdr *);
2716                                                 ph->param_type = htons(
2717                                                     SCTP_CAUSE_USER_INITIATED_ABT);
2718                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2719                                                 ippp = (uint32_t *) (ph + 1);
2720                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
2721                                         }
2722                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
2723                                         sctp_send_abort_tcb(asoc, op_err);
2724                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2725                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2726                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2727                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2728                                         }
2729                                         sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6);
2730                                         continue;
2731                                 }
2732                         }
2733                         cnt_in_sd++;
2734                         SCTP_TCB_UNLOCK(asoc);
2735                 }
2736                 /* now is there some left in our SHUTDOWN state? */
2737                 if (cnt_in_sd) {
2738                         SCTP_INP_WUNLOCK(inp);
2739                         SCTP_ASOC_CREATE_UNLOCK(inp);
2740                         SCTP_INP_INFO_WUNLOCK();
2741                         SCTP_ITERATOR_UNLOCK();
2742 #ifdef SCTP_LOG_CLOSING
2743                         sctp_log_closing(inp, NULL, 2);
2744 #endif
2745                         return;
2746                 }
2747         }
2748         inp->sctp_socket = NULL;
2749         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
2750             SCTP_PCB_FLAGS_UNBOUND) {
2751                 /*
2752                  * ok, this guy has been bound. It's port is somewhere in
2753                  * the sctppcbinfo hash table. Remove it!
2754                  */
2755                 LIST_REMOVE(inp, sctp_hash);
2756                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
2757         }
2758         /*
2759          * If there is a timer running to kill us, forget it, since it may
2760          * have a contest on the INP lock.. which would cause us to die ...
2761          */
2762         cnt = 0;
2763         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
2764             asoc = nasoc) {
2765                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2766                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2767                         cnt++;
2768                         continue;
2769                 }
2770                 /* Free associations that are NOT killing us */
2771                 SCTP_TCB_LOCK(asoc);
2772                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
2773                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
2774                         struct mbuf *op_err;
2775                         uint32_t *ippp;
2776
2777                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
2778                             0, M_DONTWAIT, 1, MT_DATA);
2779                         if (op_err) {
2780                                 /* Fill in the user initiated abort */
2781                                 struct sctp_paramhdr *ph;
2782
2783                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
2784                                     sizeof(uint32_t));
2785                                 ph = mtod(op_err, struct sctp_paramhdr *);
2786                                 ph->param_type = htons(
2787                                     SCTP_CAUSE_USER_INITIATED_ABT);
2788                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
2789                                 ippp = (uint32_t *) (ph + 1);
2790                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
2791
2792                         }
2793                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
2794                         sctp_send_abort_tcb(asoc, op_err);
2795                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
2796                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2797                         cnt++;
2798                         SCTP_TCB_UNLOCK(asoc);
2799                         continue;
2800                 }
2801                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
2802                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
2803                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
2804                 }
2805                 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8);
2806         }
2807         if (cnt) {
2808                 /* Ok we have someone out there that will kill us */
2809                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2810                 SCTP_INP_WUNLOCK(inp);
2811                 SCTP_ASOC_CREATE_UNLOCK(inp);
2812                 SCTP_INP_INFO_WUNLOCK();
2813                 SCTP_ITERATOR_UNLOCK();
2814 #ifdef SCTP_LOG_CLOSING
2815                 sctp_log_closing(inp, NULL, 3);
2816 #endif
2817                 return;
2818         }
2819         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
2820                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2821                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
2822                 SCTP_INP_WUNLOCK(inp);
2823                 SCTP_ASOC_CREATE_UNLOCK(inp);
2824                 SCTP_INP_INFO_WUNLOCK();
2825                 SCTP_ITERATOR_UNLOCK();
2826 #ifdef SCTP_LOG_CLOSING
2827                 sctp_log_closing(inp, NULL, 4);
2828 #endif
2829                 return;
2830         }
2831         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2832         inp->sctp_ep.signature_change.type = 0;
2833         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
2834
2835 #ifdef SCTP_LOG_CLOSING
2836         sctp_log_closing(inp, NULL, 5);
2837 #endif
2838
2839         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
2840         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
2841         /* Clear the read queue */
2842         /* sa_ignore FREED_MEMORY */
2843         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
2844                 /* Its only abandoned if it had data left */
2845                 if (sq->length)
2846                         SCTP_STAT_INCR(sctps_left_abandon);
2847
2848                 TAILQ_REMOVE(&inp->read_queue, sq, next);
2849                 sctp_free_remote_addr(sq->whoFrom);
2850                 if (so)
2851                         so->so_rcv.sb_cc -= sq->length;
2852                 if (sq->data) {
2853                         sctp_m_freem(sq->data);
2854                         sq->data = NULL;
2855                 }
2856                 /*
2857                  * no need to free the net count, since at this point all
2858                  * assoc's are gone.
2859                  */
2860                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
2861                 SCTP_DECR_READQ_COUNT();
2862         }
2863         /* Now the sctp_pcb things */
2864         /*
2865          * free each asoc if it is not already closed/free. we can't use the
2866          * macro here since le_next will get freed as part of the
2867          * sctp_free_assoc() call.
2868          */
2869         cnt = 0;
2870         if (so) {
2871 #ifdef IPSEC
2872                 ipsec4_delete_pcbpolicy(ip_pcb);
2873 #endif                          /* IPSEC */
2874
2875                 /* Unlocks not needed since the socket is gone now */
2876         }
2877         if (ip_pcb->inp_options) {
2878                 (void)sctp_m_free(ip_pcb->inp_options);
2879                 ip_pcb->inp_options = 0;
2880         }
2881         if (ip_pcb->inp_moptions) {
2882                 inp_freemoptions(ip_pcb->inp_moptions);
2883                 ip_pcb->inp_moptions = 0;
2884         }
2885 #ifdef INET6
2886         if (ip_pcb->inp_vflag & INP_IPV6) {
2887                 struct in6pcb *in6p;
2888
2889                 in6p = (struct in6pcb *)inp;
2890                 ip6_freepcbopts(in6p->in6p_outputopts);
2891         }
2892 #endif                          /* INET6 */
2893         ip_pcb->inp_vflag = 0;
2894         /* free up authentication fields */
2895         if (inp->sctp_ep.local_auth_chunks != NULL)
2896                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
2897         if (inp->sctp_ep.local_hmacs != NULL)
2898                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
2899
2900         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2901         while (shared_key) {
2902                 LIST_REMOVE(shared_key, next);
2903                 sctp_free_sharedkey(shared_key);
2904                 /* sa_ignore FREED_MEMORY */
2905                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
2906         }
2907
2908         inp_save = LIST_NEXT(inp, sctp_list);
2909         LIST_REMOVE(inp, sctp_list);
2910
2911         /* fix any iterators only after out of the list */
2912         sctp_iterator_inp_being_freed(inp, inp_save);
2913         /*
2914          * if we have an address list the following will free the list of
2915          * ifaddr's that are set into this ep. Again macro limitations here,
2916          * since the LIST_FOREACH could be a bad idea.
2917          */
2918         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
2919             laddr = nladdr) {
2920                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
2921                 sctp_remove_laddr(laddr);
2922         }
2923
2924 #ifdef SCTP_TRACK_FREED_ASOCS
2925         /* TEMP CODE */
2926         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
2927             asoc = nasoc) {
2928                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
2929                 LIST_REMOVE(asoc, sctp_tcblist);
2930                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
2931                 SCTP_DECR_ASOC_COUNT();
2932         }
2933         /* *** END TEMP CODE *** */
2934 #endif
2935         /* Now lets see about freeing the EP hash table. */
2936         if (inp->sctp_tcbhash != NULL) {
2937                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
2938                 inp->sctp_tcbhash = NULL;
2939         }
2940         /* Now we must put the ep memory back into the zone pool */
2941         INP_LOCK_DESTROY(&inp->ip_inp.inp);
2942         SCTP_INP_LOCK_DESTROY(inp);
2943         SCTP_INP_READ_DESTROY(inp);
2944         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
2945         SCTP_INP_INFO_WUNLOCK();
2946
2947         SCTP_ITERATOR_UNLOCK();
2948
2949         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
2950         SCTP_DECR_EP_COUNT();
2951
2952 }
2953
2954
2955 struct sctp_nets *
2956 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
2957 {
2958         struct sctp_nets *net;
2959
2960         /* locate the address */
2961         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2962                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
2963                         return (net);
2964         }
2965         return (NULL);
2966 }
2967
2968
2969 int
2970 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
2971 {
2972         struct sctp_ifa *sctp_ifa;
2973
2974         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0);
2975         if (sctp_ifa) {
2976                 return (1);
2977         } else {
2978                 return (0);
2979         }
2980 }
2981
2982 /*
2983  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
2984  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
2985  * stats of stuff.
2986  */
2987 int
2988 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
2989     int set_scope, int from)
2990 {
2991         /*
2992          * The following is redundant to the same lines in the
2993          * sctp_aloc_assoc() but is needed since other's call the add
2994          * address function
2995          */
2996         struct sctp_nets *net, *netfirst;
2997         int addr_inscope;
2998
2999         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3000             from);
3001         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3002
3003         netfirst = sctp_findnet(stcb, newaddr);
3004         if (netfirst) {
3005                 /*
3006                  * Lie and return ok, we don't want to make the association
3007                  * go away for this behavior. It will happen in the TCP
3008                  * model in a connected socket. It does not reach the hash
3009                  * table until after the association is built so it can't be
3010                  * found. Mark as reachable, since the initial creation will
3011                  * have been cleared and the NOT_IN_ASSOC flag will have
3012                  * been added... and we don't want to end up removing it
3013                  * back out.
3014                  */
3015                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3016                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3017                             SCTP_ADDR_UNCONFIRMED);
3018                 } else {
3019                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3020                 }
3021
3022                 return (0);
3023         }
3024         addr_inscope = 1;
3025         if (newaddr->sa_family == AF_INET) {
3026                 struct sockaddr_in *sin;
3027
3028                 sin = (struct sockaddr_in *)newaddr;
3029                 if (sin->sin_addr.s_addr == 0) {
3030                         /* Invalid address */
3031                         return (-1);
3032                 }
3033                 /* zero out the bzero area */
3034                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3035
3036                 /* assure len is set */
3037                 sin->sin_len = sizeof(struct sockaddr_in);
3038                 if (set_scope) {
3039 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3040                         stcb->ipv4_local_scope = 1;
3041 #else
3042                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3043                                 stcb->asoc.ipv4_local_scope = 1;
3044                         }
3045 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3046                 } else {
3047                         /* Validate the address is in scope */
3048                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3049                             (stcb->asoc.ipv4_local_scope == 0)) {
3050                                 addr_inscope = 0;
3051                         }
3052                 }
3053         } else if (newaddr->sa_family == AF_INET6) {
3054                 struct sockaddr_in6 *sin6;
3055
3056                 sin6 = (struct sockaddr_in6 *)newaddr;
3057                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3058                         /* Invalid address */
3059                         return (-1);
3060                 }
3061                 /* assure len is set */
3062                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3063                 if (set_scope) {
3064                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3065                                 stcb->asoc.loopback_scope = 1;
3066                                 stcb->asoc.local_scope = 0;
3067                                 stcb->asoc.ipv4_local_scope = 1;
3068                                 stcb->asoc.site_scope = 1;
3069                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3070                                 /*
3071                                  * If the new destination is a LINK_LOCAL we
3072                                  * must have common site scope. Don't set
3073                                  * the local scope since we may not share
3074                                  * all links, only loopback can do this.
3075                                  * Links on the local network would also be
3076                                  * on our private network for v4 too.
3077                                  */
3078                                 stcb->asoc.ipv4_local_scope = 1;
3079                                 stcb->asoc.site_scope = 1;
3080                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3081                                 /*
3082                                  * If the new destination is SITE_LOCAL then
3083                                  * we must have site scope in common.
3084                                  */
3085                                 stcb->asoc.site_scope = 1;
3086                         }
3087                 } else {
3088                         /* Validate the address is in scope */
3089                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3090                             (stcb->asoc.loopback_scope == 0)) {
3091                                 addr_inscope = 0;
3092                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3093                             (stcb->asoc.local_scope == 0)) {
3094                                 addr_inscope = 0;
3095                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3096                             (stcb->asoc.site_scope == 0)) {
3097                                 addr_inscope = 0;
3098                         }
3099                 }
3100         } else {
3101                 /* not supported family type */
3102                 return (-1);
3103         }
3104         net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
3105         if (net == NULL) {
3106                 return (-1);
3107         }
3108         SCTP_INCR_RADDR_COUNT();
3109         bzero(net, sizeof(*net));
3110         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3111         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3112         if (newaddr->sa_family == AF_INET) {
3113                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3114         } else if (newaddr->sa_family == AF_INET6) {
3115                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3116         }
3117         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3118         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3119                 stcb->asoc.loopback_scope = 1;
3120                 stcb->asoc.ipv4_local_scope = 1;
3121                 stcb->asoc.local_scope = 0;
3122                 stcb->asoc.site_scope = 1;
3123                 addr_inscope = 1;
3124         }
3125         net->failure_threshold = stcb->asoc.def_net_failure;
3126         if (addr_inscope == 0) {
3127                 net->dest_state = (SCTP_ADDR_REACHABLE |
3128                     SCTP_ADDR_OUT_OF_SCOPE);
3129         } else {
3130                 if (from == SCTP_ADDR_IS_CONFIRMED)
3131                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3132                         net->dest_state = SCTP_ADDR_REACHABLE;
3133                 else
3134                         net->dest_state = SCTP_ADDR_REACHABLE |
3135                             SCTP_ADDR_UNCONFIRMED;
3136         }
3137         /*
3138          * We set this to 0, the timer code knows that this means its an
3139          * initial value
3140          */
3141         net->RTO = 0;
3142         net->RTO_measured = 0;
3143         stcb->asoc.numnets++;
3144         *(&net->ref_count) = 1;
3145         net->tos_flowlabel = 0;
3146 #ifdef INET
3147         if (newaddr->sa_family == AF_INET)
3148                 net->tos_flowlabel = stcb->asoc.default_tos;
3149 #endif
3150 #ifdef INET6
3151         if (newaddr->sa_family == AF_INET6)
3152                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3153 #endif
3154         /* Init the timer structure */
3155         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3156         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3157         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3158
3159         /* Now generate a route for this guy */
3160         /* KAME hack: embed scopeid */
3161         if (newaddr->sa_family == AF_INET6) {
3162                 struct sockaddr_in6 *sin6;
3163
3164                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3165                 (void)sa6_embedscope(sin6, ip6_use_defzone);
3166                 sin6->sin6_scope_id = 0;
3167         }
3168         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3169
3170         if (newaddr->sa_family == AF_INET6) {
3171                 struct sockaddr_in6 *sin6;
3172
3173                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3174                 (void)sa6_recoverscope(sin6);
3175         }
3176         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3177                 /* Get source address */
3178                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3179                     stcb,
3180                     (sctp_route_t *) & net->ro,
3181                     net,
3182                     0,
3183                     stcb->asoc.vrf_id);
3184                 /* Now get the interface MTU */
3185                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3186                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3187                 } else {
3188                         net->mtu = 0;
3189                 }
3190 #ifdef SCTP_PRINT_FOR_B_AND_M
3191                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3192 #endif
3193                 if (net->mtu == 0) {
3194                         /* Huh ?? */
3195                         net->mtu = SCTP_DEFAULT_MTU;
3196                 } else {
3197                         uint32_t rmtu;
3198
3199                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3200 #ifdef SCTP_PRINT_FOR_B_AND_M
3201                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3202 #endif
3203                         if (rmtu == 0) {
3204                                 /*
3205                                  * Start things off to match mtu of
3206                                  * interface please.
3207                                  */
3208                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3209                                     net->ro.ro_rt, net->mtu);
3210                         } else {
3211                                 /*
3212                                  * we take the route mtu over the interface,
3213                                  * since the route may be leading out the
3214                                  * loopback, or a different interface.
3215                                  */
3216                                 net->mtu = rmtu;
3217                         }
3218                 }
3219                 if (from == SCTP_ALLOC_ASOC) {
3220 #ifdef SCTP_PRINT_FOR_B_AND_M
3221                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3222 #endif
3223                         stcb->asoc.smallest_mtu = net->mtu;
3224                 }
3225         } else {
3226                 net->mtu = stcb->asoc.smallest_mtu;
3227         }
3228         if (stcb->asoc.smallest_mtu > net->mtu) {
3229 #ifdef SCTP_PRINT_FOR_B_AND_M
3230                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3231                     net->mtu, stcb->asoc.smallest_mtu);
3232 #endif
3233                 stcb->asoc.smallest_mtu = net->mtu;
3234         }
3235         /* JRS - Use the congestion control given in the CC module */
3236         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3237
3238         /*
3239          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3240          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3241          */
3242         net->find_pseudo_cumack = 1;
3243         net->find_rtx_pseudo_cumack = 1;
3244         net->src_addr_selected = 0;
3245         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3246         if (net->ro.ro_rt == NULL) {
3247                 /* Since we have no route put it at the back */
3248                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3249         } else if (netfirst == NULL) {
3250                 /* We are the first one in the pool. */
3251                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3252         } else if (netfirst->ro.ro_rt == NULL) {
3253                 /*
3254                  * First one has NO route. Place this one ahead of the first
3255                  * one.
3256                  */
3257                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3258         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3259                 /*
3260                  * This one has a different interface than the one at the
3261                  * top of the list. Place it ahead.
3262                  */
3263                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3264         } else {
3265                 /*
3266                  * Ok we have the same interface as the first one. Move
3267                  * forward until we find either a) one with a NULL route...
3268                  * insert ahead of that b) one with a different ifp.. insert
3269                  * after that. c) end of the list.. insert at the tail.
3270                  */
3271                 struct sctp_nets *netlook;
3272
3273                 do {
3274                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3275                         if (netlook == NULL) {
3276                                 /* End of the list */
3277                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3278                                 break;
3279                         } else if (netlook->ro.ro_rt == NULL) {
3280                                 /* next one has NO route */
3281                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3282                                 break;
3283                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3284                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3285                                     net, sctp_next);
3286                                 break;
3287                         }
3288                         /* Shift forward */
3289                         netfirst = netlook;
3290                 } while (netlook != NULL);
3291         }
3292
3293         /* got to have a primary set */
3294         if (stcb->asoc.primary_destination == 0) {
3295                 stcb->asoc.primary_destination = net;
3296         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3297                     (net->ro.ro_rt) &&
3298             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3299                 /* No route to current primary adopt new primary */
3300                 stcb->asoc.primary_destination = net;
3301         }
3302         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3303             net);
3304         /* Validate primary is first */
3305         net = TAILQ_FIRST(&stcb->asoc.nets);
3306         if ((net != stcb->asoc.primary_destination) &&
3307             (stcb->asoc.primary_destination)) {
3308                 /*
3309                  * first one on the list is NOT the primary sctp_cmpaddr()
3310                  * is much more efficent if the primary is the first on the
3311                  * list, make it so.
3312                  */
3313                 TAILQ_REMOVE(&stcb->asoc.nets,
3314                     stcb->asoc.primary_destination, sctp_next);
3315                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3316                     stcb->asoc.primary_destination, sctp_next);
3317         }
3318         return (0);
3319 }
3320
3321
3322 /*
3323  * allocate an association and add it to the endpoint. The caller must be
3324  * careful to add all additional addresses once they are know right away or
3325  * else the assoc will be may experience a blackout scenario.
3326  */
3327 struct sctp_tcb *
3328 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3329     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3330     struct thread *p
3331 )
3332 {
3333         /* note the p argument is only valid in unbound sockets */
3334
3335         struct sctp_tcb *stcb;
3336         struct sctp_association *asoc;
3337         struct sctpasochead *head;
3338         uint16_t rport;
3339         int err;
3340
3341         /*
3342          * Assumption made here: Caller has done a
3343          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3344          * address does not exist already.
3345          */
3346         if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
3347                 /* Hit max assoc, sorry no more */
3348                 *error = ENOBUFS;
3349                 return (NULL);
3350         }
3351         if (firstaddr == NULL) {
3352                 *error = EINVAL;
3353                 return (NULL);
3354         }
3355         SCTP_INP_RLOCK(inp);
3356         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
3357                 /*
3358                  * If its in the TCP pool, its NOT allowed to create an
3359                  * association. The parent listener needs to call
3360                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3361                  * off, or connected one does this.. its an error.
3362                  */
3363                 SCTP_INP_RUNLOCK(inp);
3364                 *error = EINVAL;
3365                 return (NULL);
3366         }
3367         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3368 #ifdef SCTP_DEBUG
3369         if (firstaddr) {
3370                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3371                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3372                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3373         } else {
3374                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3375         }
3376 #endif                          /* SCTP_DEBUG */
3377         if (firstaddr->sa_family == AF_INET) {
3378                 struct sockaddr_in *sin;
3379
3380                 sin = (struct sockaddr_in *)firstaddr;
3381                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
3382                         /* Invalid address */
3383                         SCTP_INP_RUNLOCK(inp);
3384                         *error = EINVAL;
3385                         return (NULL);
3386                 }
3387                 rport = sin->sin_port;
3388         } else if (firstaddr->sa_family == AF_INET6) {
3389                 struct sockaddr_in6 *sin6;
3390
3391                 sin6 = (struct sockaddr_in6 *)firstaddr;
3392                 if ((sin6->sin6_port == 0) ||
3393                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
3394                         /* Invalid address */
3395                         SCTP_INP_RUNLOCK(inp);
3396                         *error = EINVAL;
3397                         return (NULL);
3398                 }
3399                 rport = sin6->sin6_port;
3400         } else {
3401                 /* not supported family type */
3402                 SCTP_INP_RUNLOCK(inp);
3403                 *error = EINVAL;
3404                 return (NULL);
3405         }
3406         SCTP_INP_RUNLOCK(inp);
3407         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
3408                 /*
3409                  * If you have not performed a bind, then we need to do the
3410                  * ephemerial bind for you.
3411                  */
3412                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
3413                     (struct sockaddr *)NULL,
3414                     (struct sctp_ifa *)NULL,
3415                     p
3416                     ))) {
3417                         /* bind error, probably perm */
3418                         *error = err;
3419                         return (NULL);
3420                 }
3421         }
3422         stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
3423         if (stcb == NULL) {
3424                 /* out of memory? */
3425                 *error = ENOMEM;
3426                 return (NULL);
3427         }
3428         SCTP_INCR_ASOC_COUNT();
3429
3430         bzero(stcb, sizeof(*stcb));
3431         asoc = &stcb->asoc;
3432         SCTP_TCB_LOCK_INIT(stcb);
3433         SCTP_TCB_SEND_LOCK_INIT(stcb);
3434         /* setup back pointer's */
3435         stcb->sctp_ep = inp;
3436         stcb->sctp_socket = inp->sctp_socket;
3437         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
3438                 /* failed */
3439                 SCTP_TCB_LOCK_DESTROY(stcb);
3440                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3441                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3442                 SCTP_DECR_ASOC_COUNT();
3443                 *error = err;
3444                 return (NULL);
3445         }
3446         /* and the port */
3447         stcb->rport = rport;
3448         SCTP_INP_INFO_WLOCK();
3449         SCTP_INP_WLOCK(inp);
3450         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3451                 /* inpcb freed while alloc going on */
3452                 SCTP_TCB_LOCK_DESTROY(stcb);
3453                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3454                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3455                 SCTP_INP_WUNLOCK(inp);
3456                 SCTP_INP_INFO_WUNLOCK();
3457                 SCTP_DECR_ASOC_COUNT();
3458                 *error = EINVAL;
3459                 return (NULL);
3460         }
3461         SCTP_TCB_LOCK(stcb);
3462
3463         /* now that my_vtag is set, add it to the hash */
3464         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
3465             sctppcbinfo.hashasocmark)];
3466         /* put it in the bucket in the vtag hash of assoc's for the system */
3467         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
3468         SCTP_INP_INFO_WUNLOCK();
3469
3470         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
3471                 /* failure.. memory error? */
3472                 if (asoc->strmout) {
3473                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
3474                         asoc->strmout = NULL;
3475                 }
3476                 if (asoc->mapping_array) {
3477                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
3478                         asoc->mapping_array = NULL;
3479                 }
3480                 SCTP_DECR_ASOC_COUNT();
3481                 SCTP_TCB_LOCK_DESTROY(stcb);
3482                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
3483                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
3484                 SCTP_INP_WUNLOCK(inp);
3485                 *error = ENOBUFS;
3486                 return (NULL);
3487         }
3488         /* Init all the timers */
3489         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
3490         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
3491         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
3492         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
3493         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
3494         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
3495         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
3496
3497         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
3498         /* now file the port under the hash as well */
3499         if (inp->sctp_tcbhash != NULL) {
3500                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
3501                     inp->sctp_hashmark)];
3502                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
3503         }
3504         SCTP_INP_WUNLOCK(inp);
3505         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
3506         return (stcb);
3507 }
3508
3509
3510 void
3511 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
3512 {
3513         struct sctp_association *asoc;
3514
3515         asoc = &stcb->asoc;
3516         asoc->numnets--;
3517         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
3518         if (net == asoc->primary_destination) {
3519                 /* Reset primary */
3520                 struct sctp_nets *lnet;
3521
3522                 lnet = TAILQ_FIRST(&asoc->nets);
3523                 /* Try to find a confirmed primary */
3524                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
3525         }
3526         if (net == asoc->last_data_chunk_from) {
3527                 /* Reset primary */
3528                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
3529         }
3530         if (net == asoc->last_control_chunk_from) {
3531                 /* Clear net */
3532                 asoc->last_control_chunk_from = NULL;
3533         }
3534         sctp_free_remote_addr(net);
3535 }
3536
3537 /*
3538  * remove a remote endpoint address from an association, it will fail if the
3539  * address does not exist.
3540  */
3541 int
3542 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
3543 {
3544         /*
3545          * Here we need to remove a remote address. This is quite simple, we
3546          * first find it in the list of address for the association
3547          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
3548          * on that item. Note we do not allow it to be removed if there are
3549          * no other addresses.
3550          */
3551         struct sctp_association *asoc;
3552         struct sctp_nets *net, *net_tmp;
3553
3554         asoc = &stcb->asoc;
3555
3556         /* locate the address */
3557         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
3558                 net_tmp = TAILQ_NEXT(net, sctp_next);
3559                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
3560                         continue;
3561                 }
3562                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
3563                     remaddr)) {
3564                         /* we found the guy */
3565                         if (asoc->numnets < 2) {
3566                                 /* Must have at LEAST two remote addresses */
3567                                 return (-1);
3568                         } else {
3569                                 sctp_remove_net(stcb, net);
3570                                 return (0);
3571                         }
3572                 }
3573         }
3574         /* not found. */
3575         return (-2);
3576 }
3577
3578
3579 void
3580 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time)
3581 {
3582         struct sctpvtaghead *chain;
3583         struct sctp_tagblock *twait_block;
3584         struct timeval now;
3585         int set, i;
3586
3587         (void)SCTP_GETTIME_TIMEVAL(&now);
3588         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
3589         set = 0;
3590         if (!SCTP_LIST_EMPTY(chain)) {
3591                 /* Block(s) present, lets find space, and expire on the fly */
3592                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
3593                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
3594                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
3595                                     !set) {
3596                                         twait_block->vtag_block[i].tv_sec_at_expire =
3597                                             now.tv_sec + time;
3598                                         twait_block->vtag_block[i].v_tag = tag;
3599                                         set = 1;
3600                                 } else if ((twait_block->vtag_block[i].v_tag) &&
3601                                             ((long)twait_block->vtag_block[i].tv_sec_at_expire >
3602                                     now.tv_sec)) {
3603                                         /* Audit expires this guy */
3604                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
3605                                         twait_block->vtag_block[i].v_tag = 0;
3606                                         if (set == 0) {
3607                                                 /* Reuse it for my new tag */
3608                                                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT;
3609                                                 twait_block->vtag_block[0].v_tag = tag;
3610                                                 set = 1;
3611                                         }
3612                                 }
3613                         }
3614                         if (set) {
3615                                 /*
3616                                  * We only do up to the block where we can
3617                                  * place our tag for audits
3618                                  */
3619                                 break;
3620                         }
3621                 }
3622         }
3623         /* Need to add a new block to chain */
3624         if (!set) {
3625                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
3626                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
3627                 if (twait_block == NULL) {
3628                         return;
3629                 }
3630                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
3631                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
3632                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec +
3633                     SCTP_TIME_WAIT;
3634                 twait_block->vtag_block[0].v_tag = tag;
3635         }
3636 }
3637
3638
3639 static void
3640 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3641 {
3642         struct sctp_iterator *it;
3643
3644         /*
3645          * Unlock the tcb lock we do this so we avoid a dead lock scenario
3646          * where the iterator is waiting on the TCB lock and the TCB lock is
3647          * waiting on the iterator lock.
3648          */
3649         it = stcb->asoc.stcb_starting_point_for_iterator;
3650         if (it == NULL) {
3651                 return;
3652         }
3653         if (it->inp != stcb->sctp_ep) {
3654                 /* hmm, focused on the wrong one? */
3655                 return;
3656         }
3657         if (it->stcb != stcb) {
3658                 return;
3659         }
3660         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
3661         if (it->stcb == NULL) {
3662                 /* done with all asoc's in this assoc */
3663                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3664                         it->inp = NULL;
3665                 } else {
3666                         it->inp = LIST_NEXT(inp, sctp_list);
3667                 }
3668         }
3669 }
3670
3671
3672 /*
3673  * Free the association after un-hashing the remote port.
3674  */
3675 int
3676 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
3677 {
3678         int i;
3679         struct sctp_association *asoc;
3680         struct sctp_nets *net, *prev;
3681         struct sctp_laddr *laddr;
3682         struct sctp_tmit_chunk *chk;
3683         struct sctp_asconf_addr *aparam;
3684         struct sctp_stream_reset_list *liste;
3685         struct sctp_queued_to_read *sq;
3686         struct sctp_stream_queue_pending *sp;
3687         sctp_sharedkey_t *shared_key;
3688         struct socket *so;
3689         int ccnt = 0;
3690         int cnt = 0;
3691
3692         /* first, lets purge the entry from the hash table. */
3693
3694 #ifdef SCTP_LOG_CLOSING
3695         sctp_log_closing(inp, stcb, 6);
3696 #endif
3697         if (stcb->asoc.state == 0) {
3698 #ifdef SCTP_LOG_CLOSING
3699                 sctp_log_closing(inp, NULL, 7);
3700 #endif
3701                 /* there is no asoc, really TSNH :-0 */
3702                 return (1);
3703         }
3704         /* TEMP CODE */
3705         if (stcb->freed_from_where == 0) {
3706                 /* Only record the first place free happened from */
3707                 stcb->freed_from_where = from_location;
3708         }
3709         /* TEMP CODE */
3710
3711         asoc = &stcb->asoc;
3712         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3713             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3714                 /* nothing around */
3715                 so = NULL;
3716         else
3717                 so = inp->sctp_socket;
3718
3719         /*
3720          * We used timer based freeing if a reader or writer is in the way.
3721          * So we first check if we are actually being called from a timer,
3722          * if so we abort early if a reader or writer is still in the way.
3723          */
3724         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
3725             (from_inpcbfree == SCTP_NORMAL_PROC)) {
3726                 /*
3727                  * is it the timer driving us? if so are the reader/writers
3728                  * gone?
3729                  */
3730                 if (stcb->asoc.refcnt) {
3731                         /* nope, reader or writer in the way */
3732                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3733                         /* no asoc destroyed */
3734                         SCTP_TCB_UNLOCK(stcb);
3735 #ifdef SCTP_LOG_CLOSING
3736                         sctp_log_closing(inp, stcb, 8);
3737 #endif
3738                         return (0);
3739                 }
3740         }
3741         /* now clean up any other timers */
3742         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3743         asoc->hb_timer.self = NULL;
3744         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3745         asoc->dack_timer.self = NULL;
3746         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3747         /*-
3748          * For stream reset we don't blast this unless
3749          * it is a str-reset timer, it might be the
3750          * free-asoc timer which we DON'T want to
3751          * disturb.
3752          */
3753         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
3754                 asoc->strreset_timer.self = NULL;
3755         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3756         asoc->asconf_timer.self = NULL;
3757         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3758         asoc->autoclose_timer.self = NULL;
3759         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3760         asoc->shut_guard_timer.self = NULL;
3761         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3762         asoc->delayed_event_timer.self = NULL;
3763         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3764                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3765                 net->fr_timer.self = NULL;
3766                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3767                 net->rxt_timer.self = NULL;
3768                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3769                 net->pmtu_timer.self = NULL;
3770         }
3771         /* Now the read queue needs to be cleaned up (only once) */
3772         cnt = 0;
3773         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
3774                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
3775                 SCTP_INP_READ_LOCK(inp);
3776                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
3777                         if (sq->stcb == stcb) {
3778                                 sq->do_not_ref_stcb = 1;
3779                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
3780                                 /*
3781                                  * If there is no end, there never will be
3782                                  * now.
3783                                  */
3784                                 if (sq->end_added == 0) {
3785                                         /* Held for PD-API clear that. */
3786                                         sq->pdapi_aborted = 1;
3787                                         sq->held_length = 0;
3788                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) {
3789                                                 /*
3790                                                  * Need to add a PD-API
3791                                                  * aborted indication.
3792                                                  * Setting the control_pdapi
3793                                                  * assures that it will be
3794                                                  * added right after this
3795                                                  * msg.
3796                                                  */
3797                                                 uint32_t strseq;
3798
3799                                                 stcb->asoc.control_pdapi = sq;
3800                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
3801                                                 sctp_notify_partial_delivery_indication(stcb,
3802                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
3803                                                 stcb->asoc.control_pdapi = NULL;
3804                                         }
3805                                 }
3806                                 /* Add an end to wake them */
3807                                 sq->end_added = 1;
3808                                 cnt++;
3809                         }
3810                 }
3811                 SCTP_INP_READ_UNLOCK(inp);
3812                 if (stcb->block_entry) {
3813                         cnt++;
3814                         stcb->block_entry->error = ECONNRESET;
3815                         stcb->block_entry = NULL;
3816                 }
3817         }
3818         if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) {
3819                 /*
3820                  * reader or writer in the way, we have hopefully given him
3821                  * something to chew on above.
3822                  */
3823                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
3824                 SCTP_TCB_UNLOCK(stcb);
3825                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3826                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3827                         /* nothing around */
3828                         so = NULL;
3829                 if (so) {
3830                         /* Wake any reader/writers */
3831                         sctp_sorwakeup(inp, so);
3832                         sctp_sowwakeup(inp, so);
3833                 }
3834 #ifdef SCTP_LOG_CLOSING
3835                 sctp_log_closing(inp, stcb, 9);
3836 #endif
3837                 /* no asoc destroyed */
3838                 return (0);
3839         }
3840 #ifdef SCTP_LOG_CLOSING
3841         sctp_log_closing(inp, stcb, 10);
3842 #endif
3843         /*
3844          * When I reach here, no others want to kill the assoc yet.. and I
3845          * own the lock. Now its possible an abort comes in when I do the
3846          * lock exchange below to grab all the locks to do the final take
3847          * out. to prevent this we increment the count, which will start a
3848          * timer and blow out above thus assuring us that we hold exclusive
3849          * killing of the asoc. Note that after getting back the TCB lock we
3850          * will go ahead and increment the counter back up and stop any
3851          * timer a passing stranger may have started :-S
3852          */
3853         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3854                 atomic_add_int(&stcb->asoc.refcnt, 1);
3855
3856                 SCTP_TCB_UNLOCK(stcb);
3857
3858                 SCTP_ITERATOR_LOCK();
3859                 SCTP_INP_INFO_WLOCK();
3860                 SCTP_INP_WLOCK(inp);
3861                 SCTP_TCB_LOCK(stcb);
3862         }
3863         /* Double check the GONE flag */
3864         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
3865             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
3866                 /* nothing around */
3867                 so = NULL;
3868
3869         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
3870             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
3871                 /*
3872                  * For TCP type we need special handling when we are
3873                  * connected. We also include the peel'ed off ones to.
3874                  */
3875                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
3876                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
3877                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
3878                         if (so) {
3879                                 SOCK_LOCK(so);
3880                                 if (so->so_rcv.sb_cc == 0) {
3881                                         so->so_state &= ~(SS_ISCONNECTING |
3882                                             SS_ISDISCONNECTING |
3883                                             SS_ISCONFIRMING |
3884                                             SS_ISCONNECTED);
3885                                 }
3886                                 SOCK_UNLOCK(so);
3887                                 sctp_sowwakeup(inp, so);
3888                                 sctp_sorwakeup(inp, so);
3889                                 SCTP_SOWAKEUP(so);
3890                         }
3891                 }
3892         }
3893         /*
3894          * Make it invalid too, that way if its about to run it will abort
3895          * and return.
3896          */
3897         sctp_iterator_asoc_being_freed(inp, stcb);
3898         /* re-increment the lock */
3899         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3900                 atomic_add_int(&stcb->asoc.refcnt, -1);
3901         }
3902         asoc->state = 0;
3903         if (inp->sctp_tcbhash) {
3904                 LIST_REMOVE(stcb, sctp_tcbhash);
3905         }
3906         if (stcb->asoc.in_restart_hash) {
3907                 LIST_REMOVE(stcb, sctp_tcbrestarhash);
3908         }
3909         /* Now lets remove it from the list of ALL associations in the EP */
3910         LIST_REMOVE(stcb, sctp_tcblist);
3911         if (from_inpcbfree == SCTP_NORMAL_PROC) {
3912                 SCTP_INP_INCR_REF(inp);
3913                 SCTP_INP_WUNLOCK(inp);
3914                 SCTP_ITERATOR_UNLOCK();
3915         }
3916         /* pull from vtag hash */
3917         LIST_REMOVE(stcb, sctp_asocs);
3918         sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT);
3919
3920
3921         /*
3922          * Now restop the timers to be sure - this is paranoia at is finest!
3923          */
3924         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3925         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
3926         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
3927         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
3928         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
3929         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
3930         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
3931         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
3932
3933         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
3934                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
3935                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
3936                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
3937         }
3938
3939         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
3940         prev = NULL;
3941         /*
3942          * The chunk lists and such SHOULD be empty but we check them just
3943          * in case.
3944          */
3945         /* anything on the wheel needs to be removed */
3946         for (i = 0; i < asoc->streamoutcnt; i++) {
3947                 struct sctp_stream_out *outs;
3948
3949                 outs = &asoc->strmout[i];
3950                 /* now clean up any chunks here */
3951                 sp = TAILQ_FIRST(&outs->outqueue);
3952                 while (sp) {
3953                         TAILQ_REMOVE(&outs->outqueue, sp, next);
3954                         if (sp->data) {
3955                                 sctp_m_freem(sp->data);
3956                                 sp->data = NULL;
3957                                 sp->tail_mbuf = NULL;
3958                         }
3959                         sctp_free_remote_addr(sp->net);
3960                         sctp_free_spbufspace(stcb, asoc, sp);
3961                         /* Free the zone stuff  */
3962                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
3963                         SCTP_DECR_STRMOQ_COUNT();
3964                         /* sa_ignore FREED_MEMORY */
3965                         sp = TAILQ_FIRST(&outs->outqueue);
3966                 }
3967         }
3968
3969         /* sa_ignore FREED_MEMORY */
3970         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
3971                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
3972                 SCTP_FREE(liste, SCTP_M_STRESET);
3973         }
3974
3975         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3976         while (sq) {
3977                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
3978                 if (sq->data) {
3979                         sctp_m_freem(sq->data);
3980                         sq->data = NULL;
3981                 }
3982                 sctp_free_remote_addr(sq->whoFrom);
3983                 sq->whoFrom = NULL;
3984                 sq->stcb = NULL;
3985                 /* Free the ctl entry */
3986                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
3987                 SCTP_DECR_READQ_COUNT();
3988                 /* sa_ignore FREED_MEMORY */
3989                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
3990         }
3991
3992         chk = TAILQ_FIRST(&asoc->free_chunks);
3993         while (chk) {
3994                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
3995                 if (chk->data) {
3996                         sctp_m_freem(chk->data);
3997                         chk->data = NULL;
3998                 }
3999                 ccnt++;
4000                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4001                 SCTP_DECR_CHK_COUNT();
4002                 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
4003                 asoc->free_chunk_cnt--;
4004                 /* sa_ignore FREED_MEMORY */
4005                 chk = TAILQ_FIRST(&asoc->free_chunks);
4006         }
4007         /* pending send queue SHOULD be empty */
4008         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4009                 chk = TAILQ_FIRST(&asoc->send_queue);
4010                 while (chk) {
4011                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4012                         if (chk->data) {
4013                                 sctp_m_freem(chk->data);
4014                                 chk->data = NULL;
4015                         }
4016                         ccnt++;
4017                         sctp_free_remote_addr(chk->whoTo);
4018                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4019                         SCTP_DECR_CHK_COUNT();
4020                         /* sa_ignore FREED_MEMORY */
4021                         chk = TAILQ_FIRST(&asoc->send_queue);
4022                 }
4023         }
4024 /*
4025   if(ccnt) {
4026   printf("Freed %d from send_queue\n", ccnt);
4027   ccnt = 0;
4028   }
4029 */
4030         /* sent queue SHOULD be empty */
4031         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4032                 chk = TAILQ_FIRST(&asoc->sent_queue);
4033                 while (chk) {
4034                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4035                         if (chk->data) {
4036                                 sctp_m_freem(chk->data);
4037                                 chk->data = NULL;
4038                         }
4039                         ccnt++;
4040                         sctp_free_remote_addr(chk->whoTo);
4041                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4042                         SCTP_DECR_CHK_COUNT();
4043                         /* sa_ignore FREED_MEMORY */
4044                         chk = TAILQ_FIRST(&asoc->sent_queue);
4045                 }
4046         }
4047 /*
4048   if(ccnt) {
4049   printf("Freed %d from sent_queue\n", ccnt);
4050   ccnt = 0;
4051   }
4052 */
4053         /* control queue MAY not be empty */
4054         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4055                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4056                 while (chk) {
4057                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4058                         if (chk->data) {
4059                                 sctp_m_freem(chk->data);
4060                                 chk->data = NULL;
4061                         }
4062                         ccnt++;
4063                         sctp_free_remote_addr(chk->whoTo);
4064                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4065                         SCTP_DECR_CHK_COUNT();
4066                         /* sa_ignore FREED_MEMORY */
4067                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4068                 }
4069         }
4070 /*
4071   if(ccnt) {
4072   printf("Freed %d from ctrl_queue\n", ccnt);
4073   ccnt = 0;
4074   }
4075 */
4076         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4077                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4078                 while (chk) {
4079                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4080                         if (chk->data) {
4081                                 sctp_m_freem(chk->data);
4082                                 chk->data = NULL;
4083                         }
4084                         sctp_free_remote_addr(chk->whoTo);
4085                         ccnt++;
4086                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
4087                         SCTP_DECR_CHK_COUNT();
4088                         /* sa_ignore FREED_MEMORY */
4089                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4090                 }
4091         }
4092 /*
4093   if(ccnt) {
4094   printf("Freed %d from reasm_queue\n", ccnt);
4095   ccnt = 0;
4096   }
4097 */
4098         if (asoc->mapping_array) {
4099                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4100                 asoc->mapping_array = NULL;
4101         }
4102         /* the stream outs */
4103         if (asoc->strmout) {
4104                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4105                 asoc->strmout = NULL;
4106         }
4107         asoc->streamoutcnt = 0;
4108         if (asoc->strmin) {
4109                 struct sctp_queued_to_read *ctl;
4110
4111                 for (i = 0; i < asoc->streamincnt; i++) {
4112                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4113                                 /* We have somethings on the streamin queue */
4114                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4115                                 while (ctl) {
4116                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4117                                             ctl, next);
4118                                         sctp_free_remote_addr(ctl->whoFrom);
4119                                         if (ctl->data) {
4120                                                 sctp_m_freem(ctl->data);
4121                                                 ctl->data = NULL;
4122                                         }
4123                                         /*
4124                                          * We don't free the address here
4125                                          * since all the net's were freed
4126                                          * above.
4127                                          */
4128                                         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
4129                                         SCTP_DECR_READQ_COUNT();
4130                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4131                                 }
4132                         }
4133                 }
4134                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4135                 asoc->strmin = NULL;
4136         }
4137         asoc->streamincnt = 0;
4138         while (!TAILQ_EMPTY(&asoc->nets)) {
4139                 /* sa_ignore FREED_MEMORY */
4140                 net = TAILQ_FIRST(&asoc->nets);
4141                 /* pull from list */
4142                 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
4143 #ifdef INVARIANTS
4144                         panic("no net's left alloc'ed, or list points to itself");
4145 #endif
4146                         break;
4147                 }
4148                 prev = net;
4149                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4150                 sctp_free_remote_addr(net);
4151         }
4152
4153         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4154                 /* sa_ignore FREED_MEMORY */
4155                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4156                 sctp_remove_laddr(laddr);
4157         }
4158
4159         /* pending asconf (address) parameters */
4160         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4161                 /* sa_ignore FREED_MEMORY */
4162                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4163                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4164                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4165         }
4166         if (asoc->last_asconf_ack_sent != NULL) {
4167                 sctp_m_freem(asoc->last_asconf_ack_sent);
4168                 asoc->last_asconf_ack_sent = NULL;
4169         }
4170         /* clean up auth stuff */
4171         if (asoc->local_hmacs)
4172                 sctp_free_hmaclist(asoc->local_hmacs);
4173         if (asoc->peer_hmacs)
4174                 sctp_free_hmaclist(asoc->peer_hmacs);
4175
4176         if (asoc->local_auth_chunks)
4177                 sctp_free_chunklist(asoc->local_auth_chunks);
4178         if (asoc->peer_auth_chunks)
4179                 sctp_free_chunklist(asoc->peer_auth_chunks);
4180
4181         sctp_free_authinfo(&asoc->authinfo);
4182
4183         shared_key = LIST_FIRST(&asoc->shared_keys);
4184         while (shared_key) {
4185                 LIST_REMOVE(shared_key, next);
4186                 sctp_free_sharedkey(shared_key);
4187                 /* sa_ignore FREED_MEMORY */
4188                 shared_key = LIST_FIRST(&asoc->shared_keys);
4189         }
4190
4191         /* Insert new items here :> */
4192
4193         /* Get rid of LOCK */
4194         SCTP_TCB_LOCK_DESTROY(stcb);
4195         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4196         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4197                 SCTP_INP_INFO_WUNLOCK();
4198                 SCTP_INP_RLOCK(inp);
4199         }
4200 #ifdef SCTP_TRACK_FREED_ASOCS
4201         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4202                 /* now clean up the tasoc itself */
4203                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4204                 SCTP_DECR_ASOC_COUNT();
4205         } else {
4206                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4207         }
4208 #else
4209         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
4210         SCTP_DECR_ASOC_COUNT();
4211 #endif
4212         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4213                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4214                         /*
4215                          * If its NOT the inp_free calling us AND sctp_close
4216                          * as been called, we call back...
4217                          */
4218                         SCTP_INP_RUNLOCK(inp);
4219                         /*
4220                          * This will start the kill timer (if we are the
4221                          * lastone) since we hold an increment yet. But this
4222                          * is the only safe way to do this since otherwise
4223                          * if the socket closes at the same time we are here
4224                          * we might collide in the cleanup.
4225                          */
4226                         sctp_inpcb_free(inp,
4227                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
4228                             SCTP_CALLED_DIRECTLY_NOCMPSET);
4229                         SCTP_INP_DECR_REF(inp);
4230                         goto out_of;
4231                 } else {
4232                         /* The socket is still open. */
4233                         SCTP_INP_DECR_REF(inp);
4234                 }
4235         }
4236         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4237                 SCTP_INP_RUNLOCK(inp);
4238         }
4239 out_of:
4240         /* destroyed the asoc */
4241 #ifdef SCTP_LOG_CLOSING
4242         sctp_log_closing(inp, NULL, 11);
4243 #endif
4244         return (1);
4245 }
4246
4247
4248
4249 /*
4250  * determine if a destination is "reachable" based upon the addresses bound
4251  * to the current endpoint (e.g. only v4 or v6 currently bound)
4252  */
4253 /*
4254  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
4255  * assoc level v4/v6 flags, as the assoc *may* not have the same address
4256  * types bound as its endpoint
4257  */
4258 int
4259 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
4260 {
4261         struct sctp_inpcb *inp;
4262         int answer;
4263
4264         /*
4265          * No locks here, the TCB, in all cases is already locked and an
4266          * assoc is up. There is either a INP lock by the caller applied (in
4267          * asconf case when deleting an address) or NOT in the HB case,
4268          * however if HB then the INP increment is up and the INP will not
4269          * be removed (on top of the fact that we have a TCB lock). So we
4270          * only want to read the sctp_flags, which is either bound-all or
4271          * not.. no protection needed since once an assoc is up you can't be
4272          * changing your binding.
4273          */
4274         inp = stcb->sctp_ep;
4275         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4276                 /* if bound all, destination is not restricted */
4277                 /*
4278                  * RRS: Question during lock work: Is this correct? If you
4279                  * are bound-all you still might need to obey the V4--V6
4280                  * flags??? IMO this bound-all stuff needs to be removed!
4281                  */
4282                 return (1);
4283         }
4284         /* NOTE: all "scope" checks are done when local addresses are added */
4285         if (destaddr->sa_family == AF_INET6) {
4286                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
4287         } else if (destaddr->sa_family == AF_INET) {
4288                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
4289         } else {
4290                 /* invalid family, so it's unreachable */
4291                 answer = 0;
4292         }
4293         return (answer);
4294 }
4295
4296 /*
4297  * update the inp_vflags on an endpoint
4298  */
4299 static void
4300 sctp_update_ep_vflag(struct sctp_inpcb *inp)
4301 {
4302         struct sctp_laddr *laddr;
4303
4304         /* first clear the flag */
4305         inp->ip_inp.inp.inp_vflag = 0;
4306         /* set the flag based on addresses on the ep list */
4307         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4308                 if (laddr->ifa == NULL) {
4309                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
4310                             __FUNCTION__);
4311                         continue;
4312                 }
4313                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
4314                         continue;
4315                 }
4316                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
4317                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4318                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
4319                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4320                 }
4321         }
4322 }
4323
4324 /*
4325  * Add the address to the endpoint local address list There is nothing to be
4326  * done if we are bound to all addresses
4327  */
4328 void
4329 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
4330 {
4331         struct sctp_laddr *laddr;
4332         int fnd, error = 0;
4333
4334         fnd = 0;
4335
4336         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4337                 /* You are already bound to all. You have it already */
4338                 return;
4339         }
4340         if (ifa->address.sa.sa_family == AF_INET6) {
4341                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4342                         /* Can't bind a non-useable addr. */
4343                         return;
4344                 }
4345         }
4346         /* first, is it already present? */
4347         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4348                 if (laddr->ifa == ifa) {
4349                         fnd = 1;
4350                         break;
4351                 }
4352         }
4353
4354         if (fnd == 0) {
4355                 /* Not in the ep list */
4356                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
4357                 if (error != 0)
4358                         return;
4359                 inp->laddr_count++;
4360                 /* update inp_vflag flags */
4361                 if (ifa->address.sa.sa_family == AF_INET6) {
4362                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
4363                 } else if (ifa->address.sa.sa_family == AF_INET) {
4364                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
4365                 }
4366         }
4367         return;
4368 }
4369
4370
4371 /*
4372  * select a new (hopefully reachable) destination net (should only be used
4373  * when we deleted an ep addr that is the only usable source address to reach
4374  * the destination net)
4375  */
4376 static void
4377 sctp_select_primary_destination(struct sctp_tcb *stcb)
4378 {
4379         struct sctp_nets *net;
4380
4381         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4382                 /* for now, we'll just pick the first reachable one we find */
4383                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
4384                         continue;
4385                 if (sctp_destination_is_reachable(stcb,
4386                     (struct sockaddr *)&net->ro._l_addr)) {
4387                         /* found a reachable destination */
4388                         stcb->asoc.primary_destination = net;
4389                 }
4390         }
4391         /* I can't there from here! ...we're gonna die shortly... */
4392 }
4393
4394
4395 /*
4396  * Delete the address from the endpoint local address list There is nothing
4397  * to be done if we are bound to all addresses
4398  */
4399 void
4400 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
4401 {
4402         struct sctp_laddr *laddr;
4403         int fnd;
4404
4405         fnd = 0;
4406         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
4407                 /* You are already bound to all. You have it already */
4408                 return;
4409         }
4410         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
4411                 if (laddr->ifa == ifa) {
4412                         fnd = 1;
4413                         break;
4414                 }
4415         }
4416         if (fnd && (inp->laddr_count < 2)) {
4417                 /* can't delete unless there are at LEAST 2 addresses */
4418                 return;
4419         }
4420         if (fnd) {
4421                 /*
4422                  * clean up any use of this address go through our
4423                  * associations and clear any last_used_address that match
4424                  * this one for each assoc, see if a new primary_destination
4425                  * is needed
4426                  */
4427                 struct sctp_tcb *stcb;
4428
4429                 /* clean up "next_addr_touse" */
4430                 if (inp->next_addr_touse == laddr)
4431                         /* delete this address */
4432                         inp->next_addr_touse = NULL;
4433
4434                 /* clean up "last_used_address" */
4435                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
4436                         struct sctp_nets *net;
4437
4438                         SCTP_TCB_LOCK(stcb);
4439                         if (stcb->asoc.last_used_address == laddr)
4440                                 /* delete this address */
4441                                 stcb->asoc.last_used_address = NULL;
4442                         /*
4443                          * Now spin through all the nets and purge any ref
4444                          * to laddr
4445                          */
4446                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4447                                 if (net->ro._s_addr &&
4448                                     (net->ro._s_addr->ifa == laddr->ifa)) {
4449                                         /* Yep, purge src address selected */
4450                                         sctp_rtentry_t *rt;
4451
4452                                         /* delete this address if cached */
4453                                         rt = net->ro.ro_rt;
4454                                         if (rt != NULL) {
4455                                                 RTFREE(rt);
4456                                                 net->ro.ro_rt = NULL;
4457                                         }
4458                                         sctp_free_ifa(net->ro._s_addr);
4459                                         net->ro._s_addr = NULL;
4460                                         net->src_addr_selected = 0;
4461                                 }
4462                         }
4463                         SCTP_TCB_UNLOCK(stcb);
4464                 }               /* for each tcb */
4465                 /* remove it from the ep list */
4466                 sctp_remove_laddr(laddr);
4467                 inp->laddr_count--;
4468                 /* update inp_vflag flags */
4469                 sctp_update_ep_vflag(inp);
4470         }
4471         return;
4472 }
4473
4474 /*
4475  * Add the address to the TCB local address restricted list.
4476  * This is a "pending" address list (eg. addresses waiting for an
4477  * ASCONF-ACK response) and cannot be used as a valid source address.
4478  */
4479 void
4480 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4481 {
4482         struct sctp_inpcb *inp;
4483         struct sctp_laddr *laddr;
4484         struct sctpladdr *list;
4485
4486         /*
4487          * Assumes TCB is locked.. and possibly the INP. May need to
4488          * confirm/fix that if we need it and is not the case.
4489          */
4490         list = &stcb->asoc.sctp_restricted_addrs;
4491
4492         inp = stcb->sctp_ep;
4493         if (ifa->address.sa.sa_family == AF_INET6) {
4494                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
4495                         /* Can't bind a non-existent addr. */
4496                         return;
4497                 }
4498         }
4499         /* does the address already exist? */
4500         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
4501                 if (laddr->ifa == ifa) {
4502                         return;
4503                 }
4504         }
4505
4506         /* add to the list */
4507         (void)sctp_insert_laddr(list, ifa, 0);
4508         return;
4509 }
4510
4511 /*
4512  * insert an laddr entry with the given ifa for the desired list
4513  */
4514 int
4515 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
4516 {
4517         struct sctp_laddr *laddr;
4518
4519         laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
4520         if (laddr == NULL) {
4521                 /* out of memory? */
4522                 return (EINVAL);
4523         }
4524         SCTP_INCR_LADDR_COUNT();
4525         bzero(laddr, sizeof(*laddr));
4526         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
4527         laddr->ifa = ifa;
4528         laddr->action = act;
4529         atomic_add_int(&ifa->refcount, 1);
4530         /* insert it */
4531         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
4532
4533         return (0);
4534 }
4535
4536 /*
4537  * Remove an laddr entry from the local address list (on an assoc)
4538  */
4539 void
4540 sctp_remove_laddr(struct sctp_laddr *laddr)
4541 {
4542
4543         /* remove from the list */
4544         LIST_REMOVE(laddr, sctp_nxt_addr);
4545         sctp_free_ifa(laddr->ifa);
4546         SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
4547         SCTP_DECR_LADDR_COUNT();
4548 }
4549
4550 /*
4551  * Remove a local address from the TCB local address restricted list
4552  */
4553 void
4554 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
4555 {
4556         struct sctp_inpcb *inp;
4557         struct sctp_laddr *laddr;
4558
4559         /*
4560          * This is called by asconf work. It is assumed that a) The TCB is
4561          * locked and b) The INP is locked. This is true in as much as I can
4562          * trace through the entry asconf code where I did these locks.
4563          * Again, the ASCONF code is a bit different in that it does lock
4564          * the INP during its work often times. This must be since we don't
4565          * want other proc's looking up things while what they are looking
4566          * up is changing :-D
4567          */
4568
4569         inp = stcb->sctp_ep;
4570         /* if subset bound and don't allow ASCONF's, can't delete last */
4571         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
4572             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
4573                 if (stcb->sctp_ep->laddr_count < 2) {
4574                         /* can't delete last address */
4575                         return;
4576                 }
4577         }
4578         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
4579                 /* remove the address if it exists */
4580                 if (laddr->ifa == NULL)
4581                         continue;
4582                 if (laddr->ifa == ifa) {
4583                         sctp_remove_laddr(laddr);
4584                         return;
4585                 }
4586         }
4587
4588         /* address not found! */
4589         return;
4590 }
4591
4592 static char sctp_pcb_initialized = 0;
4593
4594 /*
4595  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
4596  */
4597 /* sysctl */
4598 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
4599 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
4600
4601 void
4602 sctp_pcb_init()
4603 {
4604         /*
4605          * SCTP initialization for the PCB structures should be called by
4606          * the sctp_init() funciton.
4607          */
4608         int i;
4609
4610         if (sctp_pcb_initialized != 0) {
4611                 /* error I was called twice */
4612                 return;
4613         }
4614         sctp_pcb_initialized = 1;
4615
4616         bzero(&sctpstat, sizeof(struct sctpstat));
4617         (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime);
4618         /* init the empty list of (All) Endpoints */
4619         LIST_INIT(&sctppcbinfo.listhead);
4620
4621         /* init the iterator head */
4622         TAILQ_INIT(&sctppcbinfo.iteratorhead);
4623
4624         /* init the hash table of endpoints */
4625         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
4626         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
4627         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
4628         sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
4629             &sctppcbinfo.hashasocmark);
4630         sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
4631             &sctppcbinfo.hashmark);
4632         sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
4633             &sctppcbinfo.hashtcpmark);
4634         sctppcbinfo.hashtblsize = sctp_hashtblsize;
4635
4636         /* init the small hash table we use to track restarted asoc's */
4637         sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
4638             &sctppcbinfo.hashrestartmark);
4639
4640
4641         sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
4642             &sctppcbinfo.hashvrfmark);
4643
4644         sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
4645             &sctppcbinfo.vrf_ifn_hashmark);
4646
4647         /* init the zones */
4648         /*
4649          * FIX ME: Should check for NULL returns, but if it does fail we are
4650          * doomed to panic anyways... add later maybe.
4651          */
4652         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep",
4653             sizeof(struct sctp_inpcb), maxsockets);
4654
4655         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
4656             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
4657
4658         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
4659             sizeof(struct sctp_laddr),
4660             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4661
4662         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
4663             sizeof(struct sctp_nets),
4664             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
4665
4666         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
4667             sizeof(struct sctp_tmit_chunk),
4668             (sctp_max_number_of_assoc * sctp_chunkscale));
4669
4670         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
4671             sizeof(struct sctp_queued_to_read),
4672             (sctp_max_number_of_assoc * sctp_chunkscale));
4673
4674         SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
4675             sizeof(struct sctp_stream_queue_pending),
4676             (sctp_max_number_of_assoc * sctp_chunkscale));
4677
4678         /* Master Lock INIT for info structure */
4679         SCTP_INP_INFO_LOCK_INIT();
4680         SCTP_STATLOG_INIT_LOCK();
4681         SCTP_ITERATOR_LOCK_INIT();
4682
4683         SCTP_IPI_COUNT_INIT();
4684         SCTP_IPI_ADDR_INIT();
4685         SCTP_IPI_ITERATOR_WQ_INIT();
4686 #ifdef SCTP_PACKET_LOGGING
4687         SCTP_IP_PKTLOG_INIT();
4688 #endif
4689         LIST_INIT(&sctppcbinfo.addr_wq);
4690
4691         /* not sure if we need all the counts */
4692         sctppcbinfo.ipi_count_ep = 0;
4693         /* assoc/tcb zone info */
4694         sctppcbinfo.ipi_count_asoc = 0;
4695         /* local addrlist zone info */
4696         sctppcbinfo.ipi_count_laddr = 0;
4697         /* remote addrlist zone info */
4698         sctppcbinfo.ipi_count_raddr = 0;
4699         /* chunk info */
4700         sctppcbinfo.ipi_count_chunk = 0;
4701
4702         /* socket queue zone info */
4703         sctppcbinfo.ipi_count_readq = 0;
4704
4705         /* stream out queue cont */
4706         sctppcbinfo.ipi_count_strmoq = 0;
4707
4708         sctppcbinfo.ipi_free_strmoq = 0;
4709         sctppcbinfo.ipi_free_chunks = 0;
4710
4711         SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
4712
4713         /* Init the TIMEWAIT list */
4714         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
4715                 LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
4716         }
4717
4718 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
4719         sctppcbinfo.iterator_running = 0;
4720         sctp_startup_iterator();
4721 #endif
4722
4723         /*
4724          * INIT the default VRF which for BSD is the only one, other O/S's
4725          * may have more. But initially they must start with one and then
4726          * add the VRF's as addresses are added.
4727          */
4728         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
4729
4730 }
4731
4732
4733 int
4734 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
4735     int iphlen, int offset, int limit, struct sctphdr *sh,
4736     struct sockaddr *altsa)
4737 {
4738         /*
4739          * grub through the INIT pulling addresses and loading them to the
4740          * nets structure in the asoc. The from address in the mbuf should
4741          * also be loaded (if it is not already). This routine can be called
4742          * with either INIT or INIT-ACK's as long as the m points to the IP
4743          * packet and the offset points to the beginning of the parameters.
4744          */
4745         struct sctp_inpcb *inp, *l_inp;
4746         struct sctp_nets *net, *net_tmp;
4747         struct ip *iph;
4748         struct sctp_paramhdr *phdr, parm_buf;
4749         struct sctp_tcb *stcb_tmp;
4750         uint16_t ptype, plen;
4751         struct sockaddr *sa;
4752         struct sockaddr_storage dest_store;
4753         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
4754         struct sockaddr_in sin;
4755         struct sockaddr_in6 sin6;
4756         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
4757         struct sctp_auth_random *p_random = NULL;
4758         uint16_t random_len = 0;
4759         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
4760         struct sctp_auth_hmac_algo *hmacs = NULL;
4761         uint16_t hmacs_len = 0;
4762         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
4763         struct sctp_auth_chunk_list *chunks = NULL;
4764         uint16_t num_chunks = 0;
4765         sctp_key_t *new_key;
4766         uint32_t keylen;
4767         int got_random = 0, got_hmacs = 0, got_chklist = 0;
4768
4769         /* First get the destination address setup too. */
4770         memset(&sin, 0, sizeof(sin));
4771         memset(&sin6, 0, sizeof(sin6));
4772
4773         sin.sin_family = AF_INET;
4774         sin.sin_len = sizeof(sin);
4775         sin.sin_port = stcb->rport;
4776
4777         sin6.sin6_family = AF_INET6;
4778         sin6.sin6_len = sizeof(struct sockaddr_in6);
4779         sin6.sin6_port = stcb->rport;
4780         if (altsa == NULL) {
4781                 iph = mtod(m, struct ip *);
4782                 if (iph->ip_v == IPVERSION) {
4783                         /* its IPv4 */
4784                         struct sockaddr_in *sin_2;
4785
4786                         sin_2 = (struct sockaddr_in *)(local_sa);
4787                         memset(sin_2, 0, sizeof(sin));
4788                         sin_2->sin_family = AF_INET;
4789                         sin_2->sin_len = sizeof(sin);
4790                         sin_2->sin_port = sh->dest_port;
4791                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
4792                         sin.sin_addr = iph->ip_src;
4793                         sa = (struct sockaddr *)&sin;
4794                 } else if (iph->ip_v == (IPV6_VERSION >> 4)) {
4795                         /* its IPv6 */
4796                         struct ip6_hdr *ip6;
4797                         struct sockaddr_in6 *sin6_2;
4798
4799                         ip6 = mtod(m, struct ip6_hdr *);
4800                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
4801                         memset(sin6_2, 0, sizeof(sin6));
4802                         sin6_2->sin6_family = AF_INET6;
4803                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
4804                         sin6_2->sin6_port = sh->dest_port;
4805                         sin6.sin6_addr = ip6->ip6_src;
4806                         sa = (struct sockaddr *)&sin6;
4807                 } else {
4808                         sa = NULL;
4809                 }
4810         } else {
4811                 /*
4812                  * For cookies we use the src address NOT from the packet
4813                  * but from the original INIT
4814                  */
4815                 sa = altsa;
4816         }
4817         /* Turn off ECN until we get through all params */
4818         stcb->asoc.ecn_allowed = 0;
4819         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
4820                 /* mark all addresses that we have currently on the list */
4821                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
4822         }
4823         /* does the source address already exist? if so skip it */
4824         l_inp = inp = stcb->sctp_ep;
4825
4826         atomic_add_int(&stcb->asoc.refcnt, 1);
4827         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
4828         atomic_add_int(&stcb->asoc.refcnt, -1);
4829
4830         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
4831                 /* we must add the source address */
4832                 /* no scope set here since we have a tcb already. */
4833                 if ((sa->sa_family == AF_INET) &&
4834                     (stcb->asoc.ipv4_addr_legal)) {
4835                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
4836                                 return (-1);
4837                         }
4838                 } else if ((sa->sa_family == AF_INET6) &&
4839                     (stcb->asoc.ipv6_addr_legal)) {
4840                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
4841                                 return (-2);
4842                         }
4843                 }
4844         } else {
4845                 if (net_tmp != NULL && stcb_tmp == stcb) {
4846                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
4847                 } else if (stcb_tmp != stcb) {
4848                         /* It belongs to another association? */
4849                         if (stcb_tmp)
4850                                 SCTP_TCB_UNLOCK(stcb_tmp);
4851                         return (-3);
4852                 }
4853         }
4854         if (stcb->asoc.state == 0) {
4855                 /* the assoc was freed? */
4856                 return (-4);
4857         }
4858         /*
4859          * peer must explicitly turn this on. This may have been initialized
4860          * to be "on" in order to allow local addr changes while INIT's are
4861          * in flight.
4862          */
4863         stcb->asoc.peer_supports_asconf = 0;
4864         /* now we must go through each of the params. */
4865         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
4866         while (phdr) {
4867                 ptype = ntohs(phdr->param_type);
4868                 plen = ntohs(phdr->param_length);
4869                 /*
4870                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
4871                  * (int)plen);
4872                  */
4873                 if (offset + plen > limit) {
4874                         break;
4875                 }
4876                 if (plen == 0) {
4877                         break;
4878                 }
4879                 if (ptype == SCTP_IPV4_ADDRESS) {
4880                         if (stcb->asoc.ipv4_addr_legal) {
4881                                 struct sctp_ipv4addr_param *p4, p4_buf;
4882
4883                                 /* ok get the v4 address and check/add */
4884                                 phdr = sctp_get_next_param(m, offset,
4885                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
4886                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
4887                                     phdr == NULL) {
4888                                         return (-5);
4889                                 }
4890                                 p4 = (struct sctp_ipv4addr_param *)phdr;
4891                                 sin.sin_addr.s_addr = p4->addr;
4892                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
4893                                         /* Skip multi-cast addresses */
4894                                         goto next_param;
4895                                 }
4896                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
4897                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
4898                                         goto next_param;
4899                                 }
4900                                 sa = (struct sockaddr *)&sin;
4901                                 inp = stcb->sctp_ep;
4902                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4903                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4904                                     local_sa, stcb);
4905                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4906
4907                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
4908                                     inp == NULL) {
4909                                         /* we must add the source address */
4910                                         /*
4911                                          * no scope set since we have a tcb
4912                                          * already
4913                                          */
4914
4915                                         /*
4916                                          * we must validate the state again
4917                                          * here
4918                                          */
4919                                         if (stcb->asoc.state == 0) {
4920                                                 /* the assoc was freed? */
4921                                                 return (-7);
4922                                         }
4923                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
4924                                                 return (-8);
4925                                         }
4926                                 } else if (stcb_tmp == stcb) {
4927                                         if (stcb->asoc.state == 0) {
4928                                                 /* the assoc was freed? */
4929                                                 return (-10);
4930                                         }
4931                                         if (net != NULL) {
4932                                                 /* clear flag */
4933                                                 net->dest_state &=
4934                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
4935                                         }
4936                                 } else {
4937                                         /*
4938                                          * strange, address is in another
4939                                          * assoc? straighten out locks.
4940                                          */
4941                                         if (stcb_tmp)
4942                                                 SCTP_TCB_UNLOCK(stcb_tmp);
4943
4944                                         if (stcb->asoc.state == 0) {
4945                                                 /* the assoc was freed? */
4946                                                 return (-12);
4947                                         }
4948                                         return (-13);
4949                                 }
4950                         }
4951                 } else if (ptype == SCTP_IPV6_ADDRESS) {
4952                         if (stcb->asoc.ipv6_addr_legal) {
4953                                 /* ok get the v6 address and check/add */
4954                                 struct sctp_ipv6addr_param *p6, p6_buf;
4955
4956                                 phdr = sctp_get_next_param(m, offset,
4957                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
4958                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
4959                                     phdr == NULL) {
4960                                         return (-14);
4961                                 }
4962                                 p6 = (struct sctp_ipv6addr_param *)phdr;
4963                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
4964                                     sizeof(p6->addr));
4965                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
4966                                         /* Skip multi-cast addresses */
4967                                         goto next_param;
4968                                 }
4969                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
4970                                         /*
4971                                          * Link local make no sense without
4972                                          * scope
4973                                          */
4974                                         goto next_param;
4975                                 }
4976                                 sa = (struct sockaddr *)&sin6;
4977                                 inp = stcb->sctp_ep;
4978                                 atomic_add_int(&stcb->asoc.refcnt, 1);
4979                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
4980                                     local_sa, stcb);
4981                                 atomic_add_int(&stcb->asoc.refcnt, -1);
4982                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
4983                                     inp == NULL)) {
4984                                         /*
4985                                          * we must validate the state again
4986                                          * here
4987                                          */
4988                                         if (stcb->asoc.state == 0) {
4989                                                 /* the assoc was freed? */
4990                                                 return (-16);
4991                                         }
4992                                         /*
4993                                          * we must add the address, no scope
4994                                          * set
4995                                          */
4996                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
4997                                                 return (-17);
4998                                         }
4999                                 } else if (stcb_tmp == stcb) {
5000                                         /*
5001                                          * we must validate the state again
5002                                          * here
5003                                          */
5004                                         if (stcb->asoc.state == 0) {
5005                                                 /* the assoc was freed? */
5006                                                 return (-19);
5007                                         }
5008                                         if (net != NULL) {
5009                                                 /* clear flag */
5010                                                 net->dest_state &=
5011                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5012                                         }
5013                                 } else {
5014                                         /*
5015                                          * strange, address is in another
5016                                          * assoc? straighten out locks.
5017                                          */
5018                                         if (stcb_tmp)
5019                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5020
5021                                         if (stcb->asoc.state == 0) {
5022                                                 /* the assoc was freed? */
5023                                                 return (-21);
5024                                         }
5025                                         return (-22);
5026                                 }
5027                         }
5028                 } else if (ptype == SCTP_ECN_CAPABLE) {
5029                         stcb->asoc.ecn_allowed = 1;
5030                 } else if (ptype == SCTP_ULP_ADAPTATION) {
5031                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
5032                                 struct sctp_adaptation_layer_indication ai,
5033                                                                 *aip;
5034
5035                                 phdr = sctp_get_next_param(m, offset,
5036                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
5037                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
5038                                 if (aip) {
5039                                         sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION,
5040                                             stcb, ntohl(aip->indication), NULL);
5041                                 }
5042                         }
5043                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5044                         struct sctp_asconf_addr_param lstore, *fee;
5045                         struct sctp_asconf_addrv4_param *fii;
5046                         int lptype;
5047                         struct sockaddr *lsa = NULL;
5048
5049                         stcb->asoc.peer_supports_asconf = 1;
5050                         if (plen > sizeof(lstore)) {
5051                                 return (-23);
5052                         }
5053                         phdr = sctp_get_next_param(m, offset,
5054                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5055                         if (phdr == NULL) {
5056                                 return (-24);
5057                         }
5058                         fee = (struct sctp_asconf_addr_param *)phdr;
5059                         lptype = ntohs(fee->addrp.ph.param_type);
5060                         if (lptype == SCTP_IPV4_ADDRESS) {
5061                                 if (plen !=
5062                                     sizeof(struct sctp_asconf_addrv4_param)) {
5063                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5064                                             (int)sizeof(struct sctp_asconf_addrv4_param),
5065                                             plen);
5066                                 } else {
5067                                         fii = (struct sctp_asconf_addrv4_param *)fee;
5068                                         sin.sin_addr.s_addr = fii->addrp.addr;
5069                                         lsa = (struct sockaddr *)&sin;
5070                                 }
5071                         } else if (lptype == SCTP_IPV6_ADDRESS) {
5072                                 if (plen !=
5073                                     sizeof(struct sctp_asconf_addr_param)) {
5074                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5075                                             (int)sizeof(struct sctp_asconf_addr_param),
5076                                             plen);
5077                                 } else {
5078                                         memcpy(sin6.sin6_addr.s6_addr,
5079                                             fee->addrp.addr,
5080                                             sizeof(fee->addrp.addr));
5081                                         lsa = (struct sockaddr *)&sin6;
5082                                 }
5083                         }
5084                         if (lsa) {
5085                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
5086                         }
5087                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
5088                         /* Peer supports pr-sctp */
5089                         stcb->asoc.peer_supports_prsctp = 1;
5090                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
5091                         /* A supported extension chunk */
5092                         struct sctp_supported_chunk_types_param *pr_supported;
5093                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
5094                         int num_ent, i;
5095
5096                         phdr = sctp_get_next_param(m, offset,
5097                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
5098                         if (phdr == NULL) {
5099                                 return (-25);
5100                         }
5101                         stcb->asoc.peer_supports_asconf = 0;
5102                         stcb->asoc.peer_supports_prsctp = 0;
5103                         stcb->asoc.peer_supports_pktdrop = 0;
5104                         stcb->asoc.peer_supports_strreset = 0;
5105                         stcb->asoc.peer_supports_auth = 0;
5106                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
5107                         num_ent = plen - sizeof(struct sctp_paramhdr);
5108                         for (i = 0; i < num_ent; i++) {
5109                                 switch (pr_supported->chunk_types[i]) {
5110                                 case SCTP_ASCONF:
5111                                 case SCTP_ASCONF_ACK:
5112                                         stcb->asoc.peer_supports_asconf = 1;
5113                                         break;
5114                                 case SCTP_FORWARD_CUM_TSN:
5115                                         stcb->asoc.peer_supports_prsctp = 1;
5116                                         break;
5117                                 case SCTP_PACKET_DROPPED:
5118                                         stcb->asoc.peer_supports_pktdrop = 1;
5119                                         break;
5120                                 case SCTP_STREAM_RESET:
5121                                         stcb->asoc.peer_supports_strreset = 1;
5122                                         break;
5123                                 case SCTP_AUTHENTICATION:
5124                                         stcb->asoc.peer_supports_auth = 1;
5125                                         break;
5126                                 default:
5127                                         /* one I have not learned yet */
5128                                         break;
5129
5130                                 }
5131                         }
5132                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
5133                         /* Peer supports ECN-nonce */
5134                         stcb->asoc.peer_supports_ecn_nonce = 1;
5135                         stcb->asoc.ecn_nonce_allowed = 1;
5136                 } else if (ptype == SCTP_RANDOM) {
5137                         if (plen > sizeof(random_store))
5138                                 break;
5139                         if (got_random) {
5140                                 /* already processed a RANDOM */
5141                                 goto next_param;
5142                         }
5143                         phdr = sctp_get_next_param(m, offset,
5144                             (struct sctp_paramhdr *)random_store,
5145                             min(sizeof(random_store), plen));
5146                         if (phdr == NULL)
5147                                 return (-26);
5148                         p_random = (struct sctp_auth_random *)phdr;
5149                         random_len = plen - sizeof(*p_random);
5150                         /* enforce the random length */
5151                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
5152                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
5153                                 return (-27);
5154                         }
5155                         got_random = 1;
5156                 } else if (ptype == SCTP_HMAC_LIST) {
5157                         int num_hmacs;
5158                         int i;
5159
5160                         if (plen > sizeof(hmacs_store))
5161                                 break;
5162                         if (got_hmacs) {
5163                                 /* already processed a HMAC list */
5164                                 goto next_param;
5165                         }
5166                         phdr = sctp_get_next_param(m, offset,
5167                             (struct sctp_paramhdr *)hmacs_store,
5168                             min(plen, sizeof(hmacs_store)));
5169                         if (phdr == NULL)
5170                                 return (-28);
5171                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
5172                         hmacs_len = plen - sizeof(*hmacs);
5173                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
5174                         /* validate the hmac list */
5175                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
5176                                 return (-29);
5177                         }
5178                         if (stcb->asoc.peer_hmacs != NULL)
5179                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
5180                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
5181                         if (stcb->asoc.peer_hmacs != NULL) {
5182                                 for (i = 0; i < num_hmacs; i++) {
5183                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
5184                                             ntohs(hmacs->hmac_ids[i]));
5185                                 }
5186                         }
5187                         got_hmacs = 1;
5188                 } else if (ptype == SCTP_CHUNK_LIST) {
5189                         int i;
5190
5191                         if (plen > sizeof(chunks_store))
5192                                 break;
5193                         if (got_chklist) {
5194                                 /* already processed a Chunks list */
5195                                 goto next_param;
5196                         }
5197                         phdr = sctp_get_next_param(m, offset,
5198                             (struct sctp_paramhdr *)chunks_store,
5199                             min(plen, sizeof(chunks_store)));
5200                         if (phdr == NULL)
5201                                 return (-30);
5202                         chunks = (struct sctp_auth_chunk_list *)phdr;
5203                         num_chunks = plen - sizeof(*chunks);
5204                         if (stcb->asoc.peer_auth_chunks != NULL)
5205                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
5206                         else
5207                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
5208                         for (i = 0; i < num_chunks; i++) {
5209                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
5210                                     stcb->asoc.peer_auth_chunks);
5211                         }
5212                         got_chklist = 1;
5213                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
5214                             (ptype == SCTP_STATE_COOKIE) ||
5215                             (ptype == SCTP_UNRECOG_PARAM) ||
5216                             (ptype == SCTP_COOKIE_PRESERVE) ||
5217                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
5218                             (ptype == SCTP_ADD_IP_ADDRESS) ||
5219                             (ptype == SCTP_DEL_IP_ADDRESS) ||
5220                             (ptype == SCTP_ERROR_CAUSE_IND) ||
5221                     (ptype == SCTP_SUCCESS_REPORT)) {
5222                          /* don't care */ ;
5223                 } else {
5224                         if ((ptype & 0x8000) == 0x0000) {
5225                                 /*
5226                                  * must stop processing the rest of the
5227                                  * param's. Any report bits were handled
5228                                  * with the call to
5229                                  * sctp_arethere_unrecognized_parameters()
5230                                  * when the INIT or INIT-ACK was first seen.
5231                                  */
5232                                 break;
5233                         }
5234                 }
5235 next_param:
5236                 offset += SCTP_SIZE32(plen);
5237                 if (offset >= limit) {
5238                         break;
5239                 }
5240                 phdr = sctp_get_next_param(m, offset, &parm_buf,
5241                     sizeof(parm_buf));
5242         }
5243         /* Now check to see if we need to purge any addresses */
5244         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
5245                 net_tmp = TAILQ_NEXT(net, sctp_next);
5246                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
5247                     SCTP_ADDR_NOT_IN_ASSOC) {
5248                         /* This address has been removed from the asoc */
5249                         /* remove and free it */
5250                         stcb->asoc.numnets--;
5251                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
5252                         sctp_free_remote_addr(net);
5253                         if (net == stcb->asoc.primary_destination) {
5254                                 stcb->asoc.primary_destination = NULL;
5255                                 sctp_select_primary_destination(stcb);
5256                         }
5257                 }
5258         }
5259         /* validate authentication required parameters */
5260         if (got_random && got_hmacs) {
5261                 stcb->asoc.peer_supports_auth = 1;
5262         } else {
5263                 stcb->asoc.peer_supports_auth = 0;
5264         }
5265         if (!stcb->asoc.peer_supports_auth && got_chklist) {
5266                 /* peer does not support auth but sent a chunks list? */
5267                 return (-31);
5268         }
5269         if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
5270             !stcb->asoc.peer_supports_auth) {
5271                 /* peer supports asconf but not auth? */
5272                 return (-32);
5273         }
5274         /* concatenate the full random key */
5275 #ifdef SCTP_AUTH_DRAFT_04
5276         keylen = random_len;
5277         new_key = sctp_alloc_key(keylen);
5278         if (new_key != NULL) {
5279                 /* copy in the RANDOM */
5280                 if (p_random != NULL)
5281                         bcopy(p_random->random_data, new_key->key, random_len);
5282         }
5283 #else
5284         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
5285             sizeof(*hmacs) + hmacs_len;
5286         new_key = sctp_alloc_key(keylen);
5287         if (new_key != NULL) {
5288                 /* copy in the RANDOM */
5289                 if (p_random != NULL) {
5290                         keylen = sizeof(*p_random) + random_len;
5291                         bcopy(p_random, new_key->key, keylen);
5292                 }
5293                 /* append in the AUTH chunks */
5294                 if (chunks != NULL) {
5295                         bcopy(chunks, new_key->key + keylen,
5296                             sizeof(*chunks) + num_chunks);
5297                         keylen += sizeof(*chunks) + num_chunks;
5298                 }
5299                 /* append in the HMACs */
5300                 if (hmacs != NULL) {
5301                         bcopy(hmacs, new_key->key + keylen,
5302                             sizeof(*hmacs) + hmacs_len);
5303                 }
5304         }
5305 #endif
5306         else {
5307                 /* failed to get memory for the key */
5308                 return (-33);
5309         }
5310         if (stcb->asoc.authinfo.peer_random != NULL)
5311                 sctp_free_key(stcb->asoc.authinfo.peer_random);
5312         stcb->asoc.authinfo.peer_random = new_key;
5313 #ifdef SCTP_AUTH_DRAFT_04
5314         /* don't include the chunks and hmacs for draft -04 */
5315         stcb->asoc.authinfo.peer_random->keylen = random_len;
5316 #endif
5317         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
5318         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
5319
5320         return (0);
5321 }
5322
5323 int
5324 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
5325     struct sctp_nets *net)
5326 {
5327         /* make sure the requested primary address exists in the assoc */
5328         if (net == NULL && sa)
5329                 net = sctp_findnet(stcb, sa);
5330
5331         if (net == NULL) {
5332                 /* didn't find the requested primary address! */
5333                 return (-1);
5334         } else {
5335                 /* set the primary address */
5336                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
5337                         /* Must be confirmed, so queue to set */
5338                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
5339                         return (0);
5340                 }
5341                 stcb->asoc.primary_destination = net;
5342                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
5343                 net = TAILQ_FIRST(&stcb->asoc.nets);
5344                 if (net != stcb->asoc.primary_destination) {
5345                         /*
5346                          * first one on the list is NOT the primary
5347                          * sctp_cmpaddr() is much more efficent if the
5348                          * primary is the first on the list, make it so.
5349                          */
5350                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5351                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
5352                 }
5353                 return (0);
5354         }
5355 }
5356
5357
5358 int
5359 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now)
5360 {
5361         /*
5362          * This function serves two purposes. It will see if a TAG can be
5363          * re-used and return 1 for yes it is ok and 0 for don't use that
5364          * tag. A secondary function it will do is purge out old tags that
5365          * can be removed.
5366          */
5367         struct sctpasochead *head;
5368         struct sctpvtaghead *chain;
5369         struct sctp_tagblock *twait_block;
5370         struct sctp_tcb *stcb;
5371         int i;
5372
5373         SCTP_INP_INFO_WLOCK();
5374         chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
5375         /* First is the vtag in use ? */
5376
5377         head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
5378             sctppcbinfo.hashasocmark)];
5379         if (head == NULL) {
5380                 goto check_restart;
5381         }
5382         LIST_FOREACH(stcb, head, sctp_asocs) {
5383
5384                 if (stcb->asoc.my_vtag == tag) {
5385                         /*
5386                          * We should remove this if and return 0 always if
5387                          * we want vtags unique across all endpoints. For
5388                          * now within a endpoint is ok.
5389                          */
5390                         if (inp == stcb->sctp_ep) {
5391                                 /* bad tag, in use */
5392                                 SCTP_INP_INFO_WUNLOCK();
5393                                 return (0);
5394                         }
5395                 }
5396         }
5397 check_restart:
5398         /* Now lets check the restart hash */
5399         head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
5400             sctppcbinfo.hashrestartmark)];
5401         if (head == NULL) {
5402                 goto check_time_wait;
5403         }
5404         LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
5405                 if (stcb->asoc.assoc_id == tag) {
5406                         /* candidate */
5407                         if (inp == stcb->sctp_ep) {
5408                                 /* bad tag, in use */
5409                                 SCTP_INP_INFO_WUNLOCK();
5410                                 return (0);
5411                         }
5412                 }
5413         }
5414 check_time_wait:
5415         /* Now what about timed wait ? */
5416         if (!SCTP_LIST_EMPTY(chain)) {
5417                 /*
5418                  * Block(s) are present, lets see if we have this tag in the
5419                  * list
5420                  */
5421                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5422                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
5423                                 if (twait_block->vtag_block[i].v_tag == 0) {
5424                                         /* not used */
5425                                         continue;
5426                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire >
5427                                     now->tv_sec) {
5428                                         /* Audit expires this guy */
5429                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
5430                                         twait_block->vtag_block[i].v_tag = 0;
5431                                 } else if (twait_block->vtag_block[i].v_tag ==
5432                                     tag) {
5433                                         /* Bad tag, sorry :< */
5434                                         SCTP_INP_INFO_WUNLOCK();
5435                                         return (0);
5436                                 }
5437                         }
5438                 }
5439         }
5440         /* Not found, ok to use the tag */
5441         SCTP_INP_INFO_WUNLOCK();
5442         return (1);
5443 }
5444
5445
5446 static sctp_assoc_t reneged_asoc_ids[256];
5447 static uint8_t reneged_at = 0;
5448
5449
5450 static void
5451 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
5452 {
5453         /*
5454          * We must hunt this association for MBUF's past the cumack (i.e.
5455          * out of order data that we can renege on).
5456          */
5457         struct sctp_association *asoc;
5458         struct sctp_tmit_chunk *chk, *nchk;
5459         uint32_t cumulative_tsn_p1, tsn;
5460         struct sctp_queued_to_read *ctl, *nctl;
5461         int cnt, strmat, gap;
5462
5463         /* We look for anything larger than the cum-ack + 1 */
5464
5465         SCTP_STAT_INCR(sctps_protocol_drain_calls);
5466         if (sctp_do_drain == 0) {
5467                 return;
5468         }
5469         asoc = &stcb->asoc;
5470         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
5471                 /* none we can reneg on. */
5472                 return;
5473         }
5474         SCTP_STAT_INCR(sctps_protocol_drains_done);
5475         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
5476         cnt = 0;
5477         /* First look in the re-assembly queue */
5478         chk = TAILQ_FIRST(&asoc->reasmqueue);
5479         while (chk) {
5480                 /* Get the next one */
5481                 nchk = TAILQ_NEXT(chk, sctp_next);
5482                 if (compare_with_wrap(chk->rec.data.TSN_seq,
5483                     cumulative_tsn_p1, MAX_TSN)) {
5484                         /* Yep it is above cum-ack */
5485                         cnt++;
5486                         tsn = chk->rec.data.TSN_seq;
5487                         if (tsn >= asoc->mapping_array_base_tsn) {
5488                                 gap = tsn - asoc->mapping_array_base_tsn;
5489                         } else {
5490                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5491                                     tsn + 1;
5492                         }
5493                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
5494                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
5495                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
5496                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5497                         if (chk->data) {
5498                                 sctp_m_freem(chk->data);
5499                                 chk->data = NULL;
5500                         }
5501                         sctp_free_a_chunk(stcb, chk);
5502                 }
5503                 chk = nchk;
5504         }
5505         /* Ok that was fun, now we will drain all the inbound streams? */
5506         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
5507                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
5508                 while (ctl) {
5509                         nctl = TAILQ_NEXT(ctl, next);
5510                         if (compare_with_wrap(ctl->sinfo_tsn,
5511                             cumulative_tsn_p1, MAX_TSN)) {
5512                                 /* Yep it is above cum-ack */
5513                                 cnt++;
5514                                 tsn = ctl->sinfo_tsn;
5515                                 if (tsn >= asoc->mapping_array_base_tsn) {
5516                                         gap = tsn -
5517                                             asoc->mapping_array_base_tsn;
5518                                 } else {
5519                                         gap = (MAX_TSN -
5520                                             asoc->mapping_array_base_tsn) +
5521                                             tsn + 1;
5522                                 }
5523                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
5524                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
5525
5526                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
5527                                     gap);
5528                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
5529                                     ctl, next);
5530                                 if (ctl->data) {
5531                                         sctp_m_freem(ctl->data);
5532                                         ctl->data = NULL;
5533                                 }
5534                                 sctp_free_remote_addr(ctl->whoFrom);
5535                                 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
5536                                 SCTP_DECR_READQ_COUNT();
5537                         }
5538                         ctl = nctl;
5539                 }
5540         }
5541         /*
5542          * Question, should we go through the delivery queue? The only
5543          * reason things are on here is the app not reading OR a p-d-api up.
5544          * An attacker COULD send enough in to initiate the PD-API and then
5545          * send a bunch of stuff to other streams... these would wind up on
5546          * the delivery queue.. and then we would not get to them. But in
5547          * order to do this I then have to back-track and un-deliver
5548          * sequence numbers in streams.. el-yucko. I think for now we will
5549          * NOT look at the delivery queue and leave it to be something to
5550          * consider later. An alternative would be to abort the P-D-API with
5551          * a notification and then deliver the data.... Or another method
5552          * might be to keep track of how many times the situation occurs and
5553          * if we see a possible attack underway just abort the association.
5554          */
5555 #ifdef SCTP_DEBUG
5556         if (cnt) {
5557                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
5558         }
5559 #endif
5560         if (cnt) {
5561                 /*
5562                  * Now do we need to find a new
5563                  * asoc->highest_tsn_inside_map?
5564                  */
5565                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
5566                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
5567                 } else {
5568                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
5569                             asoc->highest_tsn_inside_map + 1;
5570                 }
5571                 if (gap >= (asoc->mapping_array_size << 3)) {
5572                         /*
5573                          * Something bad happened or cum-ack and high were
5574                          * behind the base, but if so earlier checks should
5575                          * have found NO data... wierd... we will start at
5576                          * end of mapping array.
5577                          */
5578                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
5579                             (int)gap,
5580                             (int)(asoc->mapping_array_size << 3),
5581                             (int)asoc->highest_tsn_inside_map);
5582                         gap = asoc->mapping_array_size << 3;
5583                 }
5584                 while (gap > 0) {
5585                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
5586                                 /* found the new highest */
5587                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
5588                                 break;
5589                         }
5590                         gap--;
5591                 }
5592                 if (gap == 0) {
5593                         /* Nothing left in map */
5594                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
5595                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
5596                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
5597                 }
5598                 asoc->last_revoke_count = cnt;
5599                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
5600                 sctp_send_sack(stcb);
5601                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN);
5602                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
5603                 reneged_at++;
5604         }
5605         /*
5606          * Another issue, in un-setting the TSN's in the mapping array we
5607          * DID NOT adjust the higest_tsn marker.  This will cause one of two
5608          * things to occur. It may cause us to do extra work in checking for
5609          * our mapping array movement. More importantly it may cause us to
5610          * SACK every datagram. This may not be a bad thing though since we
5611          * will recover once we get our cum-ack above and all this stuff we
5612          * dumped recovered.
5613          */
5614 }
5615
5616 void
5617 sctp_drain()
5618 {
5619         /*
5620          * We must walk the PCB lists for ALL associations here. The system
5621          * is LOW on MBUF's and needs help. This is where reneging will
5622          * occur. We really hope this does NOT happen!
5623          */
5624         struct sctp_inpcb *inp;
5625         struct sctp_tcb *stcb;
5626
5627         SCTP_INP_INFO_RLOCK();
5628         LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
5629                 /* For each endpoint */
5630                 SCTP_INP_RLOCK(inp);
5631                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5632                         /* For each association */
5633                         SCTP_TCB_LOCK(stcb);
5634                         sctp_drain_mbufs(inp, stcb);
5635                         SCTP_TCB_UNLOCK(stcb);
5636                 }
5637                 SCTP_INP_RUNLOCK(inp);
5638         }
5639         SCTP_INP_INFO_RUNLOCK();
5640 }
5641
5642 /*
5643  * start a new iterator
5644  * iterates through all endpoints and associations based on the pcb_state
5645  * flags and asoc_state.  "af" (mandatory) is executed for all matching
5646  * assocs and "ef" (optional) is executed when the iterator completes.
5647  * "inpf" (optional) is executed for each new endpoint as it is being
5648  * iterated through. inpe (optional) is called when the inp completes
5649  * its way through all the stcbs.
5650  */
5651 int
5652 sctp_initiate_iterator(inp_func inpf,
5653     asoc_func af,
5654     inp_func inpe,
5655     uint32_t pcb_state,
5656     uint32_t pcb_features,
5657     uint32_t asoc_state,
5658     void *argp,
5659     uint32_t argi,
5660     end_func ef,
5661     struct sctp_inpcb *s_inp,
5662     uint8_t chunk_output_off)
5663 {
5664         struct sctp_iterator *it = NULL;
5665
5666         if (af == NULL) {
5667                 return (-1);
5668         }
5669         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
5670             SCTP_M_ITER);
5671         if (it == NULL) {
5672                 return (ENOMEM);
5673         }
5674         memset(it, 0, sizeof(*it));
5675         it->function_assoc = af;
5676         it->function_inp = inpf;
5677         if (inpf)
5678                 it->done_current_ep = 0;
5679         else
5680                 it->done_current_ep = 1;
5681         it->function_atend = ef;
5682         it->pointer = argp;
5683         it->val = argi;
5684         it->pcb_flags = pcb_state;
5685         it->pcb_features = pcb_features;
5686         it->asoc_state = asoc_state;
5687         it->function_inp_end = inpe;
5688         it->no_chunk_output = chunk_output_off;
5689         if (s_inp) {
5690                 it->inp = s_inp;
5691                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
5692         } else {
5693                 SCTP_INP_INFO_RLOCK();
5694                 it->inp = LIST_FIRST(&sctppcbinfo.listhead);
5695
5696                 SCTP_INP_INFO_RUNLOCK();
5697                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
5698
5699         }
5700         SCTP_IPI_ITERATOR_WQ_LOCK();
5701         if (it->inp) {
5702                 SCTP_INP_INCR_REF(it->inp);
5703         }
5704         TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
5705 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5706         if (sctppcbinfo.iterator_running == 0) {
5707                 sctp_wakeup_iterator();
5708         }
5709         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5710 #else
5711         if (it->inp)
5712                 SCTP_INP_DECR_REF(it->inp);
5713         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5714         /* Init the timer */
5715         SCTP_OS_TIMER_INIT(&it->tmr.timer);
5716         /* add to the list of all iterators */
5717         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
5718             NULL, NULL);
5719 #endif
5720         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
5721         return (0);
5722 }