sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, 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 #include <netinet/udp.h>
  49
  50
  51 VNET_DEFINE(struct sctp_base_info, system_base_info);
  52
  53 /* FIX: we don't handle multiple link local scopes */
  54 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  55 #ifdef INET6
  56 int
  57 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  58 {
  59         struct sockaddr_in6 tmp_a, tmp_b;
  60
  61         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  62         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  63                 return 0;
  64         }
  65         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  66         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  67                 return 0;
  68         }
  69         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  70 }
  71
  72 #endif
  73
  74 void
  75 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  76 {
  77         /*
  78          * We really don't need to lock this, but I will just because it
  79          * does not hurt.
  80          */
  81         SCTP_INP_INFO_RLOCK();
  82         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  83         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  84         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  85         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  86         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  87         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  88         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  89         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  90
  91         SCTP_INP_INFO_RUNLOCK();
  92 }
  93
  94 /*
  95  * Addresses are added to VRF's (Virtual Router's). For BSD we
  96  * have only the default VRF 0. We maintain a hash list of
  97  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  98  * these has a list of addresses. When we add a new address
  99  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 100  * not exist we create it and add it to the list of IFN's
 101  * within the VRF. Once we have the sctp_ifn, we add the
 102  * address to the list. So we look something like:
 103  *
 104  * hash-vrf-table
 105  *   vrf-> ifn-> ifn -> ifn
 106  *   vrf    |
 107  *    ...   +--ifa-> ifa -> ifa
 108  *   vrf
 109  *
 110  * We keep these seperate lists since the SCTP subsystem will
 111  * point to these from its source address selection nets structure.
 112  * When an address is deleted it does not happen right away on
 113  * the SCTP side, it gets scheduled. What we do when a
 114  * delete happens is immediately remove the address from
 115  * the master list and decrement the refcount. As our
 116  * addip iterator works through and frees the src address
 117  * selection pointing to the sctp_ifa, eventually the refcount
 118  * will reach 0 and we will delete it. Note that it is assumed
 119  * that any locking on system level ifn/ifa is done at the
 120  * caller of these functions and these routines will only
 121  * lock the SCTP structures as they add or delete things.
 122  *
 123  * Other notes on VRF concepts.
 124  *  - An endpoint can be in multiple VRF's
 125  *  - An association lives within a VRF and only one VRF.
 126  *  - Any incoming packet we can deduce the VRF for by
 127  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 128  *  - Any downward send call or connect call must supply the
 129  *    VRF via ancillary data or via some sort of set default
 130  *    VRF socket option call (again for BSD no brainer since
 131  *    the VRF is always 0).
 132  *  - An endpoint may add multiple VRF's to it.
 133  *  - Listening sockets can accept associations in any
 134  *    of the VRF's they are in but the assoc will end up
 135  *    in only one VRF (gotten from the packet or connect/send).
 136  *
 137  */
 138
 139 struct sctp_vrf *
 140 sctp_allocate_vrf(int vrf_id)
 141 {
 142         struct sctp_vrf *vrf = NULL;
 143         struct sctp_vrflist *bucket;
 144
 145         /* First allocate the VRF structure */
 146         vrf = sctp_find_vrf(vrf_id);
 147         if (vrf) {
 148                 /* Already allocated */
 149                 return (vrf);
 150         }
 151         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 152             SCTP_M_VRF);
 153         if (vrf == NULL) {
 154                 /* No memory */
 155 #ifdef INVARIANTS
 156                 panic("No memory for VRF:%d", vrf_id);
 157 #endif
 158                 return (NULL);
 159         }
 160         /* setup the VRF */
 161         memset(vrf, 0, sizeof(struct sctp_vrf));
 162         vrf->vrf_id = vrf_id;
 163         LIST_INIT(&vrf->ifnlist);
 164         vrf->total_ifa_count = 0;
 165         vrf->refcount = 0;
 166         /* now also setup table ids */
 167         SCTP_INIT_VRF_TABLEID(vrf);
 168         /* Init the HASH of addresses */
 169         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 170             &vrf->vrf_addr_hashmark);
 171         if (vrf->vrf_addr_hash == NULL) {
 172                 /* No memory */
 173 #ifdef INVARIANTS
 174                 panic("No memory for VRF:%d", vrf_id);
 175 #endif
 176                 SCTP_FREE(vrf, SCTP_M_VRF);
 177                 return (NULL);
 178         }
 179         /* Add it to the hash table */
 180         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 181         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 182         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 183         return (vrf);
 184 }
 185
 186
 187 struct sctp_ifn *
 188 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 189 {
 190         struct sctp_ifn *sctp_ifnp;
 191         struct sctp_ifnlist *hash_ifn_head;
 192
 193         /*
 194          * We assume the lock is held for the addresses if thats wrong
 195          * problems could occur :-)
 196          */
 197         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 198         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 199                 if (sctp_ifnp->ifn_index == ifn_index) {
 200                         return (sctp_ifnp);
 201                 }
 202                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 203                         return (sctp_ifnp);
 204                 }
 205         }
 206         return (NULL);
 207 }
 208
 209
 210
 211 struct sctp_vrf *
 212 sctp_find_vrf(uint32_t vrf_id)
 213 {
 214         struct sctp_vrflist *bucket;
 215         struct sctp_vrf *liste;
 216
 217         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 218         LIST_FOREACH(liste, bucket, next_vrf) {
 219                 if (vrf_id == liste->vrf_id) {
 220                         return (liste);
 221                 }
 222         }
 223         return (NULL);
 224 }
 225
 226 void
 227 sctp_free_vrf(struct sctp_vrf *vrf)
 228 {
 229         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 230                 if (vrf->vrf_addr_hash) {
 231                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 232                         vrf->vrf_addr_hash = NULL;
 233                 }
 234                 /* We zero'd the count */
 235                 LIST_REMOVE(vrf, next_vrf);
 236                 SCTP_FREE(vrf, SCTP_M_VRF);
 237                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 238         }
 239 }
 240
 241 void
 242 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 243 {
 244         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 245                 /* We zero'd the count */
 246                 if (sctp_ifnp->vrf) {
 247                         sctp_free_vrf(sctp_ifnp->vrf);
 248                 }
 249                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 250                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 251         }
 252 }
 253
 254 void
 255 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 256 {
 257         struct sctp_ifn *sctp_ifnp;
 258
 259         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 260         if (sctp_ifnp != NULL) {
 261                 sctp_ifnp->ifn_mtu = mtu;
 262         }
 263 }
 264
 265
 266 void
 267 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 268 {
 269         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 270                 /* We zero'd the count */
 271                 if (sctp_ifap->ifn_p) {
 272                         sctp_free_ifn(sctp_ifap->ifn_p);
 273                 }
 274                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 275                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 276         }
 277 }
 278
 279 static void
 280 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 281 {
 282         struct sctp_ifn *found;
 283
 284         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 285         if (found == NULL) {
 286                 /* Not in the list.. sorry */
 287                 return;
 288         }
 289         if (hold_addr_lock == 0)
 290                 SCTP_IPI_ADDR_WLOCK();
 291         LIST_REMOVE(sctp_ifnp, next_bucket);
 292         LIST_REMOVE(sctp_ifnp, next_ifn);
 293         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 294             sctp_ifnp->registered_af);
 295         if (hold_addr_lock == 0)
 296                 SCTP_IPI_ADDR_WUNLOCK();
 297         /* Take away the reference, and possibly free it */
 298         sctp_free_ifn(sctp_ifnp);
 299 }
 300
 301 void
 302 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 303     const char *if_name, uint32_t ifn_index)
 304 {
 305         struct sctp_vrf *vrf;
 306         struct sctp_ifa *sctp_ifap = NULL;
 307
 308         SCTP_IPI_ADDR_RLOCK();
 309         vrf = sctp_find_vrf(vrf_id);
 310         if (vrf == NULL) {
 311                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 312                 goto out;
 313
 314         }
 315         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 316         if (sctp_ifap == NULL) {
 317                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 318                 goto out;
 319         }
 320         if (sctp_ifap->ifn_p == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 322                 goto out;
 323         }
 324         if (if_name) {
 325                 int len1, len2;
 326
 327                 len1 = strlen(if_name);
 328                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 329                 if (len1 != len2) {
 330                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 331                             len1, len2);
 332                         goto out;
 333                 }
 334                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 335                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 336                             sctp_ifap->ifn_p->ifn_name,
 337                             if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354 void
 355 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 356     const char *if_name, uint32_t ifn_index)
 357 {
 358         struct sctp_vrf *vrf;
 359         struct sctp_ifa *sctp_ifap = NULL;
 360
 361         SCTP_IPI_ADDR_RLOCK();
 362         vrf = sctp_find_vrf(vrf_id);
 363         if (vrf == NULL) {
 364                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 365                 goto out;
 366
 367         }
 368         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 369         if (sctp_ifap == NULL) {
 370                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 371                 goto out;
 372         }
 373         if (sctp_ifap->ifn_p == NULL) {
 374                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 375                 goto out;
 376         }
 377         if (if_name) {
 378                 int len1, len2;
 379
 380                 len1 = strlen(if_name);
 381                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 382                 if (len1 != len2) {
 383                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 384                             len1, len2);
 385                         goto out;
 386                 }
 387                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 389                             sctp_ifap->ifn_p->ifn_name,
 390                             if_name);
 391                         goto out;
 392                 }
 393         } else {
 394                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 395                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 396                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 397                         goto out;
 398                 }
 399         }
 400
 401         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 402         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 403 out:
 404         SCTP_IPI_ADDR_RUNLOCK();
 405 }
 406
 407 /*-
 408  * Add an ifa to an ifn.
 409  * Register the interface as necessary.
 410  * NOTE: ADDR write lock MUST be held.
 411  */
 412 static void
 413 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 414 {
 415         int ifa_af;
 416
 417         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 418         sctp_ifap->ifn_p = sctp_ifnp;
 419         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 420         /* update address counts */
 421         sctp_ifnp->ifa_count++;
 422         ifa_af = sctp_ifap->address.sa.sa_family;
 423         if (ifa_af == AF_INET)
 424                 sctp_ifnp->num_v4++;
 425         else
 426                 sctp_ifnp->num_v6++;
 427         if (sctp_ifnp->ifa_count == 1) {
 428                 /* register the new interface */
 429                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 430                 sctp_ifnp->registered_af = ifa_af;
 431         }
 432 }
 433
 434 /*-
 435  * Remove an ifa from its ifn.
 436  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 437  * the interface based on the remaining address families left.
 438  * NOTE: ADDR write lock MUST be held.
 439  */
 440 static void
 441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 442 {
 443         uint32_t ifn_index;
 444
 445         LIST_REMOVE(sctp_ifap, next_ifa);
 446         if (sctp_ifap->ifn_p) {
 447                 /* update address counts */
 448                 sctp_ifap->ifn_p->ifa_count--;
 449                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 450                         sctp_ifap->ifn_p->num_v6--;
 451                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 452                         sctp_ifap->ifn_p->num_v4--;
 453
 454                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 455                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 456                         /* remove the ifn, possibly freeing it */
 457                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 458                 } else {
 459                         /* re-register address family type, if needed */
 460                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 461                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 462                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 463                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 464                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 465                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 466                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 467                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 468                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 469                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 470                         }
 471                         /* free the ifn refcount */
 472                         sctp_free_ifn(sctp_ifap->ifn_p);
 473                 }
 474                 sctp_ifap->ifn_p = NULL;
 475         }
 476 }
 477
 478 struct sctp_ifa *
 479 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 480     uint32_t ifn_type, const char *if_name, void *ifa,
 481     struct sockaddr *addr, uint32_t ifa_flags,
 482     int dynamic_add)
 483 {
 484         struct sctp_vrf *vrf;
 485         struct sctp_ifn *sctp_ifnp = NULL;
 486         struct sctp_ifa *sctp_ifap = NULL;
 487         struct sctp_ifalist *hash_addr_head;
 488         struct sctp_ifnlist *hash_ifn_head;
 489         uint32_t hash_of_addr;
 490         int new_ifn_af = 0;
 491
 492 #ifdef SCTP_DEBUG
 493         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 494         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 495 #endif
 496         SCTP_IPI_ADDR_WLOCK();
 497         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 498         if (sctp_ifnp) {
 499                 vrf = sctp_ifnp->vrf;
 500         } else {
 501                 vrf = sctp_find_vrf(vrf_id);
 502                 if (vrf == NULL) {
 503                         vrf = sctp_allocate_vrf(vrf_id);
 504                         if (vrf == NULL) {
 505                                 SCTP_IPI_ADDR_WUNLOCK();
 506                                 return (NULL);
 507                         }
 508                 }
 509         }
 510         if (sctp_ifnp == NULL) {
 511                 /*
 512                  * build one and add it, can't hold lock until after malloc
 513                  * done though.
 514                  */
 515                 SCTP_IPI_ADDR_WUNLOCK();
 516                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 517                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 518                 if (sctp_ifnp == NULL) {
 519 #ifdef INVARIANTS
 520                         panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
 521 #endif
 522                         return (NULL);
 523                 }
 524                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 525                 sctp_ifnp->ifn_index = ifn_index;
 526                 sctp_ifnp->ifn_p = ifn;
 527                 sctp_ifnp->ifn_type = ifn_type;
 528                 sctp_ifnp->refcount = 0;
 529                 sctp_ifnp->vrf = vrf;
 530                 atomic_add_int(&vrf->refcount, 1);
 531                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 532                 if (if_name != NULL) {
 533                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 534                 } else {
 535                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 536                 }
 537                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 538                 LIST_INIT(&sctp_ifnp->ifalist);
 539                 SCTP_IPI_ADDR_WLOCK();
 540                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 541                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 542                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 543                 new_ifn_af = 1;
 544         }
 545         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 546         if (sctp_ifap) {
 547                 /* Hmm, it already exists? */
 548                 if ((sctp_ifap->ifn_p) &&
 549                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 550                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 551                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 552                             sctp_ifap);
 553                         if (new_ifn_af) {
 554                                 /* Remove the created one that we don't want */
 555                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 556                         }
 557                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 558                                 /* easy to solve, just switch back to active */
 559                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 560                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 561                                 sctp_ifap->ifn_p = sctp_ifnp;
 562                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 563                         }
 564         exit_stage_left:
 565                         SCTP_IPI_ADDR_WUNLOCK();
 566                         return (sctp_ifap);
 567                 } else {
 568                         if (sctp_ifap->ifn_p) {
 569                                 /*
 570                                  * The last IFN gets the address, removee
 571                                  * the old one
 572                                  */
 573                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 574                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 575                                     sctp_ifap->ifn_p->ifn_index, if_name,
 576                                     ifn_index);
 577                                 /* remove the address from the old ifn */
 578                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 579                                 /* move the address over to the new ifn */
 580                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 581                                 goto exit_stage_left;
 582                         } else {
 583                                 /* repair ifnp which was NULL ? */
 584                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 586                                     sctp_ifnp, sctp_ifap);
 587                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 588                         }
 589                         goto exit_stage_left;
 590                 }
 591         }
 592         SCTP_IPI_ADDR_WUNLOCK();
 593         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 594         if (sctp_ifap == NULL) {
 595 #ifdef INVARIANTS
 596                 panic("No memory for IFA");
 597 #endif
 598                 return (NULL);
 599         }
 600         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 601         sctp_ifap->ifn_p = sctp_ifnp;
 602         atomic_add_int(&sctp_ifnp->refcount, 1);
 603         sctp_ifap->vrf_id = vrf_id;
 604         sctp_ifap->ifa = ifa;
 605         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 606         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 607         sctp_ifap->flags = ifa_flags;
 608         /* Set scope */
 609         switch (sctp_ifap->address.sa.sa_family) {
 610         case AF_INET:
 611                 {
 612                         struct sockaddr_in *sin;
 613
 614                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 615                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 616                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 617                                 sctp_ifap->src_is_loop = 1;
 618                         }
 619                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 620                                 sctp_ifap->src_is_priv = 1;
 621                         }
 622                         sctp_ifnp->num_v4++;
 623                         if (new_ifn_af)
 624                                 new_ifn_af = AF_INET;
 625                         break;
 626                 }
 627 #ifdef INET6
 628         case AF_INET6:
 629                 {
 630                         /* ok to use deprecated addresses? */
 631                         struct sockaddr_in6 *sin6;
 632
 633                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 634                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 635                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 636                                 sctp_ifap->src_is_loop = 1;
 637                         }
 638                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 639                                 sctp_ifap->src_is_priv = 1;
 640                         }
 641                         sctp_ifnp->num_v6++;
 642                         if (new_ifn_af)
 643                                 new_ifn_af = AF_INET6;
 644                         break;
 645                 }
 646 #endif
 647         default:
 648                 new_ifn_af = 0;
 649                 break;
 650         }
 651         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 652
 653         if ((sctp_ifap->src_is_priv == 0) &&
 654             (sctp_ifap->src_is_loop == 0)) {
 655                 sctp_ifap->src_is_glob = 1;
 656         }
 657         SCTP_IPI_ADDR_WLOCK();
 658         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 659         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 660         sctp_ifap->refcount = 1;
 661         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 662         sctp_ifnp->ifa_count++;
 663         vrf->total_ifa_count++;
 664         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 665         if (new_ifn_af) {
 666                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 667                 sctp_ifnp->registered_af = new_ifn_af;
 668         }
 669         SCTP_IPI_ADDR_WUNLOCK();
 670         if (dynamic_add) {
 671                 /*
 672                  * Bump up the refcount so that when the timer completes it
 673                  * will drop back down.
 674                  */
 675                 struct sctp_laddr *wi;
 676
 677                 atomic_add_int(&sctp_ifap->refcount, 1);
 678                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 679                 if (wi == NULL) {
 680                         /*
 681                          * Gak, what can we do? We have lost an address
 682                          * change can you say HOSED?
 683                          */
 684                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 685                         /* Opps, must decrement the count */
 686                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 687                             if_name);
 688                         return (NULL);
 689                 }
 690                 SCTP_INCR_LADDR_COUNT();
 691                 bzero(wi, sizeof(*wi));
 692                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 693                 wi->ifa = sctp_ifap;
 694                 wi->action = SCTP_ADD_IP_ADDRESS;
 695
 696                 SCTP_WQ_ADDR_LOCK();
 697                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 698                 SCTP_WQ_ADDR_UNLOCK();
 699
 700                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 701                     (struct sctp_inpcb *)NULL,
 702                     (struct sctp_tcb *)NULL,
 703                     (struct sctp_nets *)NULL);
 704         } else {
 705                 /* it's ready for use */
 706                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 707         }
 708         return (sctp_ifap);
 709 }
 710
 711 void
 712 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 713     uint32_t ifn_index, const char *if_name)
 714 {
 715         struct sctp_vrf *vrf;
 716         struct sctp_ifa *sctp_ifap = NULL;
 717
 718         SCTP_IPI_ADDR_WLOCK();
 719         vrf = sctp_find_vrf(vrf_id);
 720         if (vrf == NULL) {
 721                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 722                 goto out_now;
 723         }
 724 #ifdef SCTP_DEBUG
 725         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 726         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 727 #endif
 728         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 729         if (sctp_ifap) {
 730                 /* Validate the delete */
 731                 if (sctp_ifap->ifn_p) {
 732                         int valid = 0;
 733
 734                         /*-
 735                          * The name has priority over the ifn_index
 736                          * if its given. We do this especially for
 737                          * panda who might recycle indexes fast.
 738                          */
 739                         if (if_name) {
 740                                 int len1, len2;
 741
 742                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 743                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 744                                 if (len1 && len2 && (len1 == len2)) {
 745                                         /* we can compare them */
 746                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 747                                                 /*
 748                                                  * They match its a correct
 749                                                  * delete
 750                                                  */
 751                                                 valid = 1;
 752                                         }
 753                                 }
 754                         }
 755                         if (!valid) {
 756                                 /* last ditch check ifn_index */
 757                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 758                                         valid = 1;
 759                                 }
 760                         }
 761                         if (!valid) {
 762                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 763                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 764                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 765                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 766                                 SCTP_IPI_ADDR_WUNLOCK();
 767                                 return;
 768                         }
 769                 }
 770                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 771                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 772                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 773                 vrf->total_ifa_count--;
 774                 LIST_REMOVE(sctp_ifap, next_bucket);
 775                 sctp_remove_ifa_from_ifn(sctp_ifap);
 776         }
 777 #ifdef SCTP_DEBUG
 778         else {
 779                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 780                     ifn_index);
 781                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 782         }
 783 #endif
 784
 785 out_now:
 786         SCTP_IPI_ADDR_WUNLOCK();
 787         if (sctp_ifap) {
 788                 struct sctp_laddr *wi;
 789
 790                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 791                 if (wi == NULL) {
 792                         /*
 793                          * Gak, what can we do? We have lost an address
 794                          * change can you say HOSED?
 795                          */
 796                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 797
 798                         /* Oops, must decrement the count */
 799                         sctp_free_ifa(sctp_ifap);
 800                         return;
 801                 }
 802                 SCTP_INCR_LADDR_COUNT();
 803                 bzero(wi, sizeof(*wi));
 804                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 805                 wi->ifa = sctp_ifap;
 806                 wi->action = SCTP_DEL_IP_ADDRESS;
 807                 SCTP_WQ_ADDR_LOCK();
 808                 /*
 809                  * Should this really be a tailq? As it is we will process
 810                  * the newest first :-0
 811                  */
 812                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 813                 SCTP_WQ_ADDR_UNLOCK();
 814
 815                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 816                     (struct sctp_inpcb *)NULL,
 817                     (struct sctp_tcb *)NULL,
 818                     (struct sctp_nets *)NULL);
 819         }
 820         return;
 821 }
 822
 823
 824 static struct sctp_tcb *
 825 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 826     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 827 {
 828         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 829         /*
 830          * If we support the TCP model, then we must now dig through to see
 831          * if we can find our endpoint in the list of tcp ep's.
 832          */
 833         uint16_t lport, rport;
 834         struct sctppcbhead *ephead;
 835         struct sctp_inpcb *inp;
 836         struct sctp_laddr *laddr;
 837         struct sctp_tcb *stcb;
 838         struct sctp_nets *net;
 839
 840         if ((to == NULL) || (from == NULL)) {
 841                 return (NULL);
 842         }
 843         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 844                 lport = ((struct sockaddr_in *)to)->sin_port;
 845                 rport = ((struct sockaddr_in *)from)->sin_port;
 846         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 847                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 848                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 849         } else {
 850                 return NULL;
 851         }
 852         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
 853         /*
 854          * Ok now for each of the guys in this bucket we must look and see:
 855          * - Does the remote port match. - Does there single association's
 856          * addresses match this address (to). If so we update p_ep to point
 857          * to this ep and return the tcb from it.
 858          */
 859         LIST_FOREACH(inp, ephead, sctp_hash) {
 860                 SCTP_INP_RLOCK(inp);
 861                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 862                         SCTP_INP_RUNLOCK(inp);
 863                         continue;
 864                 }
 865                 if (lport != inp->sctp_lport) {
 866                         SCTP_INP_RUNLOCK(inp);
 867                         continue;
 868                 }
 869                 if (inp->def_vrf_id != vrf_id) {
 870                         SCTP_INP_RUNLOCK(inp);
 871                         continue;
 872                 }
 873                 /* check to see if the ep has one of the addresses */
 874                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 875                         /* We are NOT bound all, so look further */
 876                         int match = 0;
 877
 878                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 879
 880                                 if (laddr->ifa == NULL) {
 881                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 882                                         continue;
 883                                 }
 884                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 885                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 886                                         continue;
 887                                 }
 888                                 if (laddr->ifa->address.sa.sa_family ==
 889                                     to->sa_family) {
 890                                         /* see if it matches */
 891                                         struct sockaddr_in *intf_addr, *sin;
 892
 893                                         intf_addr = &laddr->ifa->address.sin;
 894                                         sin = (struct sockaddr_in *)to;
 895                                         if (from->sa_family == AF_INET) {
 896                                                 if (sin->sin_addr.s_addr ==
 897                                                     intf_addr->sin_addr.s_addr) {
 898                                                         match = 1;
 899                                                         break;
 900                                                 }
 901                                         }
 902 #ifdef INET6
 903                                         if (from->sa_family == AF_INET6) {
 904                                                 struct sockaddr_in6 *intf_addr6;
 905                                                 struct sockaddr_in6 *sin6;
 906
 907                                                 sin6 = (struct sockaddr_in6 *)
 908                                                     to;
 909                                                 intf_addr6 = &laddr->ifa->address.sin6;
 910
 911                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 912                                                     intf_addr6)) {
 913                                                         match = 1;
 914                                                         break;
 915                                                 }
 916                                         }
 917 #endif
 918                                 }
 919                         }
 920                         if (match == 0) {
 921                                 /* This endpoint does not have this address */
 922                                 SCTP_INP_RUNLOCK(inp);
 923                                 continue;
 924                         }
 925                 }
 926                 /*
 927                  * Ok if we hit here the ep has the address, does it hold
 928                  * the tcb?
 929                  */
 930
 931                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 932                 if (stcb == NULL) {
 933                         SCTP_INP_RUNLOCK(inp);
 934                         continue;
 935                 }
 936                 SCTP_TCB_LOCK(stcb);
 937                 if (stcb->rport != rport) {
 938                         /* remote port does not match. */
 939                         SCTP_TCB_UNLOCK(stcb);
 940                         SCTP_INP_RUNLOCK(inp);
 941                         continue;
 942                 }
 943                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 944                         SCTP_TCB_UNLOCK(stcb);
 945                         SCTP_INP_RUNLOCK(inp);
 946                         continue;
 947                 }
 948                 /* Does this TCB have a matching address? */
 949                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 950
 951                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 952                                 /* not the same family, can't be a match */
 953                                 continue;
 954                         }
 955                         switch (from->sa_family) {
 956                         case AF_INET:
 957                                 {
 958                                         struct sockaddr_in *sin, *rsin;
 959
 960                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 961                                         rsin = (struct sockaddr_in *)from;
 962                                         if (sin->sin_addr.s_addr ==
 963                                             rsin->sin_addr.s_addr) {
 964                                                 /* found it */
 965                                                 if (netp != NULL) {
 966                                                         *netp = net;
 967                                                 }
 968                                                 /*
 969                                                  * Update the endpoint
 970                                                  * pointer
 971                                                  */
 972                                                 *inp_p = inp;
 973                                                 SCTP_INP_RUNLOCK(inp);
 974                                                 return (stcb);
 975                                         }
 976                                         break;
 977                                 }
 978 #ifdef INET6
 979                         case AF_INET6:
 980                                 {
 981                                         struct sockaddr_in6 *sin6, *rsin6;
 982
 983                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 984                                         rsin6 = (struct sockaddr_in6 *)from;
 985                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 986                                             rsin6)) {
 987                                                 /* found it */
 988                                                 if (netp != NULL) {
 989                                                         *netp = net;
 990                                                 }
 991                                                 /*
 992                                                  * Update the endpoint
 993                                                  * pointer
 994                                                  */
 995                                                 *inp_p = inp;
 996                                                 SCTP_INP_RUNLOCK(inp);
 997                                                 return (stcb);
 998                                         }
 999                                         break;
1000                                 }
1001 #endif
1002                         default:
1003                                 /* TSNH */
1004                                 break;
1005                         }
1006                 }
1007                 SCTP_TCB_UNLOCK(stcb);
1008                 SCTP_INP_RUNLOCK(inp);
1009         }
1010         return (NULL);
1011 }
1012
1013 /*
1014  * rules for use
1015  *
1016  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1017  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1018  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1019  * NULL.
1020  */
1021
1022 struct sctp_tcb *
1023 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1024     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1025 {
1026         struct sctpasochead *head;
1027         struct sctp_inpcb *inp;
1028         struct sctp_tcb *stcb = NULL;
1029         struct sctp_nets *net;
1030         uint16_t rport;
1031
1032         inp = *inp_p;
1033         if (remote->sa_family == AF_INET) {
1034                 rport = (((struct sockaddr_in *)remote)->sin_port);
1035         } else if (remote->sa_family == AF_INET6) {
1036                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1037         } else {
1038                 return (NULL);
1039         }
1040         if (locked_tcb) {
1041                 /*
1042                  * UN-lock so we can do proper locking here this occurs when
1043                  * called from load_addresses_from_init.
1044                  */
1045                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1046                 SCTP_TCB_UNLOCK(locked_tcb);
1047         }
1048         SCTP_INP_INFO_RLOCK();
1049         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1050                 /*-
1051                  * Now either this guy is our listener or it's the
1052                  * connector. If it is the one that issued the connect, then
1053                  * it's only chance is to be the first TCB in the list. If
1054                  * it is the acceptor, then do the special_lookup to hash
1055                  * and find the real inp.
1056                  */
1057                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1058                         /* to is peer addr, from is my addr */
1059                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1060                             netp, inp->def_vrf_id);
1061                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1062                                 /* we have a locked tcb, lower refcount */
1063                                 SCTP_INP_DECR_REF(inp);
1064                         }
1065                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1066                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1067                                 SCTP_TCB_LOCK(locked_tcb);
1068                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1069                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1070                         }
1071                         SCTP_INP_INFO_RUNLOCK();
1072                         return (stcb);
1073                 } else {
1074                         SCTP_INP_WLOCK(inp);
1075                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1076                                 goto null_return;
1077                         }
1078                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1079                         if (stcb == NULL) {
1080                                 goto null_return;
1081                         }
1082                         SCTP_TCB_LOCK(stcb);
1083
1084                         if (stcb->rport != rport) {
1085                                 /* remote port does not match. */
1086                                 SCTP_TCB_UNLOCK(stcb);
1087                                 goto null_return;
1088                         }
1089                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1090                                 SCTP_TCB_UNLOCK(stcb);
1091                                 goto null_return;
1092                         }
1093                         /* now look at the list of remote addresses */
1094                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1095 #ifdef INVARIANTS
1096                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1097                                         panic("Corrupt net list");
1098                                 }
1099 #endif
1100                                 if (net->ro._l_addr.sa.sa_family !=
1101                                     remote->sa_family) {
1102                                         /* not the same family */
1103                                         continue;
1104                                 }
1105                                 switch (remote->sa_family) {
1106                                 case AF_INET:
1107                                         {
1108                                                 struct sockaddr_in *sin,
1109                                                            *rsin;
1110
1111                                                 sin = (struct sockaddr_in *)
1112                                                     &net->ro._l_addr;
1113                                                 rsin = (struct sockaddr_in *)remote;
1114                                                 if (sin->sin_addr.s_addr ==
1115                                                     rsin->sin_addr.s_addr) {
1116                                                         /* found it */
1117                                                         if (netp != NULL) {
1118                                                                 *netp = net;
1119                                                         }
1120                                                         if (locked_tcb == NULL) {
1121                                                                 SCTP_INP_DECR_REF(inp);
1122                                                         } else if (locked_tcb != stcb) {
1123                                                                 SCTP_TCB_LOCK(locked_tcb);
1124                                                         }
1125                                                         if (locked_tcb) {
1126                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1127                                                         }
1128                                                         SCTP_INP_WUNLOCK(inp);
1129                                                         SCTP_INP_INFO_RUNLOCK();
1130                                                         return (stcb);
1131                                                 }
1132                                                 break;
1133                                         }
1134 #ifdef INET6
1135                                 case AF_INET6:
1136                                         {
1137                                                 struct sockaddr_in6 *sin6,
1138                                                             *rsin6;
1139
1140                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1141                                                 rsin6 = (struct sockaddr_in6 *)remote;
1142                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1143                                                     rsin6)) {
1144                                                         /* found it */
1145                                                         if (netp != NULL) {
1146                                                                 *netp = net;
1147                                                         }
1148                                                         if (locked_tcb == NULL) {
1149                                                                 SCTP_INP_DECR_REF(inp);
1150                                                         } else if (locked_tcb != stcb) {
1151                                                                 SCTP_TCB_LOCK(locked_tcb);
1152                                                         }
1153                                                         if (locked_tcb) {
1154                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1155                                                         }
1156                                                         SCTP_INP_WUNLOCK(inp);
1157                                                         SCTP_INP_INFO_RUNLOCK();
1158                                                         return (stcb);
1159                                                 }
1160                                                 break;
1161                                         }
1162 #endif
1163                                 default:
1164                                         /* TSNH */
1165                                         break;
1166                                 }
1167                         }
1168                         SCTP_TCB_UNLOCK(stcb);
1169                 }
1170         } else {
1171                 SCTP_INP_WLOCK(inp);
1172                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1173                         goto null_return;
1174                 }
1175                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1176                     inp->sctp_hashmark)];
1177                 if (head == NULL) {
1178                         goto null_return;
1179                 }
1180                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1181                         if (stcb->rport != rport) {
1182                                 /* remote port does not match */
1183                                 continue;
1184                         }
1185                         SCTP_TCB_LOCK(stcb);
1186                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1187                                 SCTP_TCB_UNLOCK(stcb);
1188                                 continue;
1189                         }
1190                         /* now look at the list of remote addresses */
1191                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1192 #ifdef INVARIANTS
1193                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1194                                         panic("Corrupt net list");
1195                                 }
1196 #endif
1197                                 if (net->ro._l_addr.sa.sa_family !=
1198                                     remote->sa_family) {
1199                                         /* not the same family */
1200                                         continue;
1201                                 }
1202                                 switch (remote->sa_family) {
1203                                 case AF_INET:
1204                                         {
1205                                                 struct sockaddr_in *sin,
1206                                                            *rsin;
1207
1208                                                 sin = (struct sockaddr_in *)
1209                                                     &net->ro._l_addr;
1210                                                 rsin = (struct sockaddr_in *)remote;
1211                                                 if (sin->sin_addr.s_addr ==
1212                                                     rsin->sin_addr.s_addr) {
1213                                                         /* found it */
1214                                                         if (netp != NULL) {
1215                                                                 *netp = net;
1216                                                         }
1217                                                         if (locked_tcb == NULL) {
1218                                                                 SCTP_INP_DECR_REF(inp);
1219                                                         } else if (locked_tcb != stcb) {
1220                                                                 SCTP_TCB_LOCK(locked_tcb);
1221                                                         }
1222                                                         if (locked_tcb) {
1223                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1224                                                         }
1225                                                         SCTP_INP_WUNLOCK(inp);
1226                                                         SCTP_INP_INFO_RUNLOCK();
1227                                                         return (stcb);
1228                                                 }
1229                                                 break;
1230                                         }
1231 #ifdef INET6
1232                                 case AF_INET6:
1233                                         {
1234                                                 struct sockaddr_in6 *sin6,
1235                                                             *rsin6;
1236
1237                                                 sin6 = (struct sockaddr_in6 *)
1238                                                     &net->ro._l_addr;
1239                                                 rsin6 = (struct sockaddr_in6 *)remote;
1240                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1241                                                     rsin6)) {
1242                                                         /* found it */
1243                                                         if (netp != NULL) {
1244                                                                 *netp = net;
1245                                                         }
1246                                                         if (locked_tcb == NULL) {
1247                                                                 SCTP_INP_DECR_REF(inp);
1248                                                         } else if (locked_tcb != stcb) {
1249                                                                 SCTP_TCB_LOCK(locked_tcb);
1250                                                         }
1251                                                         if (locked_tcb) {
1252                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1253                                                         }
1254                                                         SCTP_INP_WUNLOCK(inp);
1255                                                         SCTP_INP_INFO_RUNLOCK();
1256                                                         return (stcb);
1257                                                 }
1258                                                 break;
1259                                         }
1260 #endif
1261                                 default:
1262                                         /* TSNH */
1263                                         break;
1264                                 }
1265                         }
1266                         SCTP_TCB_UNLOCK(stcb);
1267                 }
1268         }
1269 null_return:
1270         /* clean up for returning null */
1271         if (locked_tcb) {
1272                 SCTP_TCB_LOCK(locked_tcb);
1273                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1274         }
1275         SCTP_INP_WUNLOCK(inp);
1276         SCTP_INP_INFO_RUNLOCK();
1277         /* not found */
1278         return (NULL);
1279 }
1280
1281 /*
1282  * Find an association for a specific endpoint using the association id given
1283  * out in the COMM_UP notification
1284  */
1285
1286 struct sctp_tcb *
1287 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1288 {
1289         /*
1290          * Use my the assoc_id to find a endpoint
1291          */
1292         struct sctpasochead *head;
1293         struct sctp_tcb *stcb;
1294         uint32_t id;
1295
1296         if (inp == NULL) {
1297                 SCTP_PRINTF("TSNH ep_associd\n");
1298                 return (NULL);
1299         }
1300         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1301                 SCTP_PRINTF("TSNH ep_associd0\n");
1302                 return (NULL);
1303         }
1304         id = (uint32_t) asoc_id;
1305         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1306         if (head == NULL) {
1307                 /* invalid id TSNH */
1308                 SCTP_PRINTF("TSNH ep_associd1\n");
1309                 return (NULL);
1310         }
1311         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1312                 if (stcb->asoc.assoc_id == id) {
1313                         if (inp != stcb->sctp_ep) {
1314                                 /*
1315                                  * some other guy has the same id active (id
1316                                  * collision ??).
1317                                  */
1318                                 SCTP_PRINTF("TSNH ep_associd2\n");
1319                                 continue;
1320                         }
1321                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1322                                 continue;
1323                         }
1324                         if (want_lock) {
1325                                 SCTP_TCB_LOCK(stcb);
1326                         }
1327                         return (stcb);
1328                 }
1329         }
1330         return (NULL);
1331 }
1332
1333
1334 struct sctp_tcb *
1335 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1336 {
1337         struct sctp_tcb *stcb;
1338
1339         SCTP_INP_RLOCK(inp);
1340         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1341         SCTP_INP_RUNLOCK(inp);
1342         return (stcb);
1343 }
1344
1345
1346 static struct sctp_inpcb *
1347 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1348     uint16_t lport, uint32_t vrf_id)
1349 {
1350         struct sctp_inpcb *inp;
1351         struct sockaddr_in *sin;
1352
1353 #ifdef INET6
1354         struct sockaddr_in6 *sin6;
1355
1356 #endif
1357         struct sctp_laddr *laddr;
1358
1359 #ifdef INET6
1360         struct sockaddr_in6 *intf_addr6;
1361
1362 #endif
1363
1364         int fnd;
1365
1366         /*
1367          * Endpoing probe expects that the INP_INFO is locked.
1368          */
1369         sin = NULL;
1370 #ifdef INET6
1371         sin6 = NULL;
1372 #endif
1373         switch (nam->sa_family) {
1374         case AF_INET:
1375                 sin = (struct sockaddr_in *)nam;
1376                 break;
1377 #ifdef INET6
1378         case AF_INET6:
1379                 sin6 = (struct sockaddr_in6 *)nam;
1380                 break;
1381 #endif
1382         default:
1383                 /* unsupported family */
1384                 return (NULL);
1385         }
1386
1387         if (head == NULL)
1388                 return (NULL);
1389
1390         LIST_FOREACH(inp, head, sctp_hash) {
1391                 SCTP_INP_RLOCK(inp);
1392                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1393                         SCTP_INP_RUNLOCK(inp);
1394                         continue;
1395                 }
1396                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1397                     (inp->sctp_lport == lport)) {
1398                         /* got it */
1399                         if ((nam->sa_family == AF_INET) &&
1400                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1401                             SCTP_IPV6_V6ONLY(inp)) {
1402                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1403                                 SCTP_INP_RUNLOCK(inp);
1404                                 continue;
1405                         }
1406                         /* A V6 address and the endpoint is NOT bound V6 */
1407                         if (nam->sa_family == AF_INET6 &&
1408                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1409                                 SCTP_INP_RUNLOCK(inp);
1410                                 continue;
1411                         }
1412                         /* does a VRF id match? */
1413                         fnd = 0;
1414                         if (inp->def_vrf_id == vrf_id)
1415                                 fnd = 1;
1416
1417                         SCTP_INP_RUNLOCK(inp);
1418                         if (!fnd)
1419                                 continue;
1420                         return (inp);
1421                 }
1422                 SCTP_INP_RUNLOCK(inp);
1423         }
1424         if ((nam->sa_family == AF_INET) &&
1425             (sin->sin_addr.s_addr == INADDR_ANY)) {
1426                 /* Can't hunt for one that has no address specified */
1427                 return (NULL);
1428         }
1429 #ifdef INET6
1430         if ((nam->sa_family == AF_INET6) &&
1431             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1432                 /* Can't hunt for one that has no address specified */
1433                 return (NULL);
1434         }
1435 #endif
1436         /*
1437          * ok, not bound to all so see if we can find a EP bound to this
1438          * address.
1439          */
1440         LIST_FOREACH(inp, head, sctp_hash) {
1441                 SCTP_INP_RLOCK(inp);
1442                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1443                         SCTP_INP_RUNLOCK(inp);
1444                         continue;
1445                 }
1446                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1447                         SCTP_INP_RUNLOCK(inp);
1448                         continue;
1449                 }
1450                 /*
1451                  * Ok this could be a likely candidate, look at all of its
1452                  * addresses
1453                  */
1454                 if (inp->sctp_lport != lport) {
1455                         SCTP_INP_RUNLOCK(inp);
1456                         continue;
1457                 }
1458                 /* does a VRF id match? */
1459                 fnd = 0;
1460                 if (inp->def_vrf_id == vrf_id)
1461                         fnd = 1;
1462
1463                 if (!fnd) {
1464                         SCTP_INP_RUNLOCK(inp);
1465                         continue;
1466                 }
1467                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1468                         if (laddr->ifa == NULL) {
1469                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1470                                     __FUNCTION__);
1471                                 continue;
1472                         }
1473                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1474                             laddr->ifa);
1475                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1476                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1477                                 continue;
1478                         }
1479                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1480                                 /* possible, see if it matches */
1481                                 struct sockaddr_in *intf_addr;
1482
1483                                 intf_addr = &laddr->ifa->address.sin;
1484                                 switch (nam->sa_family) {
1485                                 case AF_INET:
1486                                         if (sin->sin_addr.s_addr ==
1487                                             intf_addr->sin_addr.s_addr) {
1488                                                 SCTP_INP_RUNLOCK(inp);
1489                                                 return (inp);
1490                                         }
1491                                         break;
1492 #ifdef INET6
1493                                 case AF_INET6:
1494                                         intf_addr6 = &laddr->ifa->address.sin6;
1495                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1496                                             intf_addr6)) {
1497                                                 SCTP_INP_RUNLOCK(inp);
1498                                                 return (inp);
1499                                         }
1500                                         break;
1501 #endif
1502                                 }
1503                         }
1504                 }
1505                 SCTP_INP_RUNLOCK(inp);
1506         }
1507         return (NULL);
1508 }
1509
1510
1511 static struct sctp_inpcb *
1512 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1513 {
1514         struct sctppcbhead *head;
1515         struct sctp_inpcb *t_inp;
1516         int fnd;
1517
1518         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1519             SCTP_BASE_INFO(hashmark))];
1520         LIST_FOREACH(t_inp, head, sctp_hash) {
1521                 if (t_inp->sctp_lport != lport) {
1522                         continue;
1523                 }
1524                 /* is it in the VRF in question */
1525                 fnd = 0;
1526                 if (t_inp->def_vrf_id == vrf_id)
1527                         fnd = 1;
1528                 if (!fnd)
1529                         continue;
1530
1531                 /* This one is in use. */
1532                 /* check the v6/v4 binding issue */
1533                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1534                     SCTP_IPV6_V6ONLY(t_inp)) {
1535                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1536                                 /* collision in V6 space */
1537                                 return (t_inp);
1538                         } else {
1539                                 /* inp is BOUND_V4 no conflict */
1540                                 continue;
1541                         }
1542                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1543                         /* t_inp is bound v4 and v6, conflict always */
1544                         return (t_inp);
1545                 } else {
1546                         /* t_inp is bound only V4 */
1547                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1548                             SCTP_IPV6_V6ONLY(inp)) {
1549                                 /* no conflict */
1550                                 continue;
1551                         }
1552                         /* else fall through to conflict */
1553                 }
1554                 return (t_inp);
1555         }
1556         return (NULL);
1557 }
1558
1559
1560 int
1561 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1562 {
1563         /* For 1-2-1 with port reuse */
1564         struct sctppcbhead *head;
1565         struct sctp_inpcb *tinp;
1566
1567         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1568                 /* only works with port reuse on */
1569                 return (-1);
1570         }
1571         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1572                 return (0);
1573         }
1574         SCTP_INP_RUNLOCK(inp);
1575         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1576             SCTP_BASE_INFO(hashmark))];
1577         /* Kick out all non-listeners to the TCP hash */
1578         LIST_FOREACH(tinp, head, sctp_hash) {
1579                 if (tinp->sctp_lport != inp->sctp_lport) {
1580                         continue;
1581                 }
1582                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1583                         continue;
1584                 }
1585                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1586                         continue;
1587                 }
1588                 if (tinp->sctp_socket->so_qlimit) {
1589                         continue;
1590                 }
1591                 SCTP_INP_WLOCK(tinp);
1592                 LIST_REMOVE(tinp, sctp_hash);
1593                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1594                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1595                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1596                 SCTP_INP_WUNLOCK(tinp);
1597         }
1598         SCTP_INP_WLOCK(inp);
1599         /* Pull from where he was */
1600         LIST_REMOVE(inp, sctp_hash);
1601         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1602         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1603         LIST_INSERT_HEAD(head, inp, sctp_hash);
1604         SCTP_INP_WUNLOCK(inp);
1605         SCTP_INP_RLOCK(inp);
1606         return (0);
1607 }
1608
1609
1610 struct sctp_inpcb *
1611 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1612     uint32_t vrf_id)
1613 {
1614         /*
1615          * First we check the hash table to see if someone has this port
1616          * bound with just the port.
1617          */
1618         struct sctp_inpcb *inp;
1619         struct sctppcbhead *head;
1620         struct sockaddr_in *sin;
1621         struct sockaddr_in6 *sin6;
1622         int lport;
1623
1624         if (nam->sa_family == AF_INET) {
1625                 sin = (struct sockaddr_in *)nam;
1626                 lport = ((struct sockaddr_in *)nam)->sin_port;
1627         } else if (nam->sa_family == AF_INET6) {
1628                 sin6 = (struct sockaddr_in6 *)nam;
1629                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1630         } else {
1631                 /* unsupported family */
1632                 return (NULL);
1633         }
1634         /*
1635          * I could cheat here and just cast to one of the types but we will
1636          * do it right. It also provides the check against an Unsupported
1637          * type too.
1638          */
1639         /* Find the head of the ALLADDR chain */
1640         if (have_lock == 0) {
1641                 SCTP_INP_INFO_RLOCK();
1642         }
1643         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1644             SCTP_BASE_INFO(hashmark))];
1645         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1646
1647         /*
1648          * If the TCP model exists it could be that the main listening
1649          * endpoint is gone but there exists a connected socket for this guy
1650          * yet. If so we can return the first one that we find. This may NOT
1651          * be the correct one so the caller should be wary on the return
1652          * INP. Currently the onlyc caller that sets this flag is in bindx
1653          * where we are verifying that a user CAN bind the address. He
1654          * either has bound it already, or someone else has, or its open to
1655          * bind, so this is good enough.
1656          */
1657         if (inp == NULL && find_tcp_pool) {
1658                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
1659                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1660         }
1661         if (inp) {
1662                 SCTP_INP_INCR_REF(inp);
1663         }
1664         if (have_lock == 0) {
1665                 SCTP_INP_INFO_RUNLOCK();
1666         }
1667         return (inp);
1668 }
1669
1670 /*
1671  * Find an association for an endpoint with the pointer to whom you want to
1672  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1673  * need to change the *to to some other struct like a mbuf...
1674  */
1675 struct sctp_tcb *
1676 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1677     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1678     uint32_t vrf_id)
1679 {
1680         struct sctp_inpcb *inp = NULL;
1681         struct sctp_tcb *retval;
1682
1683         SCTP_INP_INFO_RLOCK();
1684         if (find_tcp_pool) {
1685                 if (inp_p != NULL) {
1686                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1687                             vrf_id);
1688                 } else {
1689                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1690                             vrf_id);
1691                 }
1692                 if (retval != NULL) {
1693                         SCTP_INP_INFO_RUNLOCK();
1694                         return (retval);
1695                 }
1696         }
1697         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1698         if (inp_p != NULL) {
1699                 *inp_p = inp;
1700         }
1701         SCTP_INP_INFO_RUNLOCK();
1702
1703         if (inp == NULL) {
1704                 return (NULL);
1705         }
1706         /*
1707          * ok, we have an endpoint, now lets find the assoc for it (if any)
1708          * we now place the source address or from in the to of the find
1709          * endpoint call. Since in reality this chain is used from the
1710          * inbound packet side.
1711          */
1712         if (inp_p != NULL) {
1713                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1714                     NULL);
1715         } else {
1716                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1717                     NULL);
1718         }
1719         return retval;
1720 }
1721
1722
1723 /*
1724  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1725  * find all addresses that the sender has specified in any address list. Each
1726  * address will be used to lookup the TCB and see if one exits.
1727  */
1728 static struct sctp_tcb *
1729 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1730     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1731     struct sockaddr *dest)
1732 {
1733         struct sockaddr_in sin4;
1734         struct sockaddr_in6 sin6;
1735         struct sctp_paramhdr *phdr, parm_buf;
1736         struct sctp_tcb *retval;
1737         uint32_t ptype, plen;
1738
1739         memset(&sin4, 0, sizeof(sin4));
1740         memset(&sin6, 0, sizeof(sin6));
1741         sin4.sin_len = sizeof(sin4);
1742         sin4.sin_family = AF_INET;
1743         sin4.sin_port = sh->src_port;
1744         sin6.sin6_len = sizeof(sin6);
1745         sin6.sin6_family = AF_INET6;
1746         sin6.sin6_port = sh->src_port;
1747
1748         retval = NULL;
1749         offset += sizeof(struct sctp_init_chunk);
1750
1751         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1752         while (phdr != NULL) {
1753                 /* now we must see if we want the parameter */
1754                 ptype = ntohs(phdr->param_type);
1755                 plen = ntohs(phdr->param_length);
1756                 if (plen == 0) {
1757                         break;
1758                 }
1759                 if (ptype == SCTP_IPV4_ADDRESS &&
1760                     plen == sizeof(struct sctp_ipv4addr_param)) {
1761                         /* Get the rest of the address */
1762                         struct sctp_ipv4addr_param ip4_parm, *p4;
1763
1764                         phdr = sctp_get_next_param(m, offset,
1765                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1766                         if (phdr == NULL) {
1767                                 return (NULL);
1768                         }
1769                         p4 = (struct sctp_ipv4addr_param *)phdr;
1770                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1771                         /* look it up */
1772                         retval = sctp_findassociation_ep_addr(inp_p,
1773                             (struct sockaddr *)&sin4, netp, dest, NULL);
1774                         if (retval != NULL) {
1775                                 return (retval);
1776                         }
1777                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1778                     plen == sizeof(struct sctp_ipv6addr_param)) {
1779                         /* Get the rest of the address */
1780                         struct sctp_ipv6addr_param ip6_parm, *p6;
1781
1782                         phdr = sctp_get_next_param(m, offset,
1783                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1784                         if (phdr == NULL) {
1785                                 return (NULL);
1786                         }
1787                         p6 = (struct sctp_ipv6addr_param *)phdr;
1788                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1789                         /* look it up */
1790                         retval = sctp_findassociation_ep_addr(inp_p,
1791                             (struct sockaddr *)&sin6, netp, dest, NULL);
1792                         if (retval != NULL) {
1793                                 return (retval);
1794                         }
1795                 }
1796                 offset += SCTP_SIZE32(plen);
1797                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1798                     sizeof(parm_buf));
1799         }
1800         return (NULL);
1801 }
1802
1803 static int
1804 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1805 {
1806         struct sctp_nets *net;
1807
1808         /*
1809          * Simple question, the ports match, does the tcb own the to
1810          * address?
1811          */
1812         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1813                 /* of course */
1814                 return (1);
1815         }
1816         /* have to look at all bound addresses */
1817         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1818                 if (net->ro._l_addr.sa.sa_family != to->sa_family) {
1819                         /* not the same family, can't be a match */
1820                         continue;
1821                 }
1822                 switch (to->sa_family) {
1823                 case AF_INET:
1824                         {
1825                                 struct sockaddr_in *sin, *rsin;
1826
1827                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
1828                                 rsin = (struct sockaddr_in *)to;
1829                                 if (sin->sin_addr.s_addr ==
1830                                     rsin->sin_addr.s_addr) {
1831                                         /* found it */
1832                                         return (1);
1833                                 }
1834                                 break;
1835                         }
1836 #ifdef INET6
1837                 case AF_INET6:
1838                         {
1839                                 struct sockaddr_in6 *sin6, *rsin6;
1840
1841                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1842                                 rsin6 = (struct sockaddr_in6 *)to;
1843                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1844                                     rsin6)) {
1845                                         /* Update the endpoint pointer */
1846                                         return (1);
1847                                 }
1848                                 break;
1849                         }
1850 #endif
1851                 default:
1852                         /* TSNH */
1853                         break;
1854                 }
1855         }
1856         /* Nope, do not have the address ;-( */
1857         return (0);
1858 }
1859
1860 static struct sctp_tcb *
1861 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1862     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1863     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1864 {
1865         /*
1866          * Use my vtag to hash. If we find it we then verify the source addr
1867          * is in the assoc. If all goes well we save a bit on rec of a
1868          * packet.
1869          */
1870         struct sctpasochead *head;
1871         struct sctp_nets *net;
1872         struct sctp_tcb *stcb;
1873
1874         *netp = NULL;
1875         *inp_p = NULL;
1876         SCTP_INP_INFO_RLOCK();
1877         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1878             SCTP_BASE_INFO(hashasocmark))];
1879         if (head == NULL) {
1880                 /* invalid vtag */
1881                 SCTP_INP_INFO_RUNLOCK();
1882                 return (NULL);
1883         }
1884         LIST_FOREACH(stcb, head, sctp_asocs) {
1885                 SCTP_INP_RLOCK(stcb->sctp_ep);
1886                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1887                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1888                         continue;
1889                 }
1890                 SCTP_TCB_LOCK(stcb);
1891                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1892                 if (stcb->asoc.my_vtag == vtag) {
1893                         /* candidate */
1894                         if (stcb->rport != rport) {
1895                                 SCTP_TCB_UNLOCK(stcb);
1896                                 continue;
1897                         }
1898                         if (stcb->sctp_ep->sctp_lport != lport) {
1899                                 SCTP_TCB_UNLOCK(stcb);
1900                                 continue;
1901                         }
1902                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1903                                 SCTP_TCB_UNLOCK(stcb);
1904                                 continue;
1905                         }
1906                         /* RRS:Need toaddr check here */
1907                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
1908                                 /* Endpoint does not own this address */
1909                                 SCTP_TCB_UNLOCK(stcb);
1910                                 continue;
1911                         }
1912                         if (remote_tag) {
1913                                 /*
1914                                  * If we have both vtags thats all we match
1915                                  * on
1916                                  */
1917                                 if (stcb->asoc.peer_vtag == remote_tag) {
1918                                         /*
1919                                          * If both tags match we consider it
1920                                          * conclusive and check NO
1921                                          * source/destination addresses
1922                                          */
1923                                         goto conclusive;
1924                                 }
1925                         }
1926                         if (skip_src_check) {
1927                 conclusive:
1928                                 if (from) {
1929                                         net = sctp_findnet(stcb, from);
1930                                 } else {
1931                                         *netp = NULL;   /* unknown */
1932                                 }
1933                                 if (inp_p)
1934                                         *inp_p = stcb->sctp_ep;
1935                                 SCTP_INP_INFO_RUNLOCK();
1936                                 return (stcb);
1937                         }
1938                         net = sctp_findnet(stcb, from);
1939                         if (net) {
1940                                 /* yep its him. */
1941                                 *netp = net;
1942                                 SCTP_STAT_INCR(sctps_vtagexpress);
1943                                 *inp_p = stcb->sctp_ep;
1944                                 SCTP_INP_INFO_RUNLOCK();
1945                                 return (stcb);
1946                         } else {
1947                                 /*
1948                                  * not him, this should only happen in rare
1949                                  * cases so I peg it.
1950                                  */
1951                                 SCTP_STAT_INCR(sctps_vtagbogus);
1952                         }
1953                 }
1954                 SCTP_TCB_UNLOCK(stcb);
1955         }
1956         SCTP_INP_INFO_RUNLOCK();
1957         return (NULL);
1958 }
1959
1960 /*
1961  * Find an association with the pointer to the inbound IP packet. This can be
1962  * a IPv4 or IPv6 packet.
1963  */
1964 struct sctp_tcb *
1965 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1966     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1967     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1968 {
1969         int find_tcp_pool;
1970         struct ip *iph;
1971         struct sctp_tcb *retval;
1972         struct sockaddr_storage to_store, from_store;
1973         struct sockaddr *to = (struct sockaddr *)&to_store;
1974         struct sockaddr *from = (struct sockaddr *)&from_store;
1975         struct sctp_inpcb *inp;
1976
1977         iph = mtod(m, struct ip *);
1978         switch (iph->ip_v) {
1979         case IPVERSION:
1980                 {
1981                         /* its IPv4 */
1982                         struct sockaddr_in *from4;
1983
1984                         from4 = (struct sockaddr_in *)&from_store;
1985                         bzero(from4, sizeof(*from4));
1986                         from4->sin_family = AF_INET;
1987                         from4->sin_len = sizeof(struct sockaddr_in);
1988                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
1989                         from4->sin_port = sh->src_port;
1990                         break;
1991                 }
1992 #ifdef INET6
1993         case IPV6_VERSION >> 4:
1994                 {
1995                         /* its IPv6 */
1996                         struct ip6_hdr *ip6;
1997                         struct sockaddr_in6 *from6;
1998
1999                         ip6 = mtod(m, struct ip6_hdr *);
2000                         from6 = (struct sockaddr_in6 *)&from_store;
2001                         bzero(from6, sizeof(*from6));
2002                         from6->sin6_family = AF_INET6;
2003                         from6->sin6_len = sizeof(struct sockaddr_in6);
2004                         from6->sin6_addr = ip6->ip6_src;
2005                         from6->sin6_port = sh->src_port;
2006                         /* Get the scopes in properly to the sin6 addr's */
2007                         /* we probably don't need these operations */
2008                         (void)sa6_recoverscope(from6);
2009                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2010                         break;
2011                 }
2012 #endif
2013         default:
2014                 /* Currently not supported. */
2015                 return (NULL);
2016         }
2017
2018
2019         switch (iph->ip_v) {
2020         case IPVERSION:
2021                 {
2022                         /* its IPv4 */
2023                         struct sockaddr_in *to4;
2024
2025                         to4 = (struct sockaddr_in *)&to_store;
2026                         bzero(to4, sizeof(*to4));
2027                         to4->sin_family = AF_INET;
2028                         to4->sin_len = sizeof(struct sockaddr_in);
2029                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2030                         to4->sin_port = sh->dest_port;
2031                         break;
2032                 }
2033 #ifdef INET6
2034         case IPV6_VERSION >> 4:
2035                 {
2036                         /* its IPv6 */
2037                         struct ip6_hdr *ip6;
2038                         struct sockaddr_in6 *to6;
2039
2040                         ip6 = mtod(m, struct ip6_hdr *);
2041                         to6 = (struct sockaddr_in6 *)&to_store;
2042                         bzero(to6, sizeof(*to6));
2043                         to6->sin6_family = AF_INET6;
2044                         to6->sin6_len = sizeof(struct sockaddr_in6);
2045                         to6->sin6_addr = ip6->ip6_dst;
2046                         to6->sin6_port = sh->dest_port;
2047                         /* Get the scopes in properly to the sin6 addr's */
2048                         /* we probably don't need these operations */
2049                         (void)sa6_recoverscope(to6);
2050                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2051                         break;
2052                 }
2053 #endif
2054         default:
2055                 /* TSNH */
2056                 break;
2057         }
2058         if (sh->v_tag) {
2059                 /* we only go down this path if vtag is non-zero */
2060                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2061                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2062                 if (retval) {
2063                         return (retval);
2064                 }
2065         }
2066         find_tcp_pool = 0;
2067         if ((ch->chunk_type != SCTP_INITIATION) &&
2068             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2069             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2070             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2071                 /* Other chunk types go to the tcp pool. */
2072                 find_tcp_pool = 1;
2073         }
2074         if (inp_p) {
2075                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2076                     find_tcp_pool, vrf_id);
2077                 inp = *inp_p;
2078         } else {
2079                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2080                     find_tcp_pool, vrf_id);
2081         }
2082         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2083         if (retval == NULL && inp) {
2084                 /* Found a EP but not this address */
2085                 if ((ch->chunk_type == SCTP_INITIATION) ||
2086                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2087                         /*-
2088                          * special hook, we do NOT return linp or an
2089                          * association that is linked to an existing
2090                          * association that is under the TCP pool (i.e. no
2091                          * listener exists). The endpoint finding routine
2092                          * will always find a listner before examining the
2093                          * TCP pool.
2094                          */
2095                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2096                                 if (inp_p) {
2097                                         *inp_p = NULL;
2098                                 }
2099                                 return (NULL);
2100                         }
2101                         retval = sctp_findassociation_special_addr(m, iphlen,
2102                             offset, sh, &inp, netp, to);
2103                         if (inp_p != NULL) {
2104                                 *inp_p = inp;
2105                         }
2106                 }
2107         }
2108         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2109         return (retval);
2110 }
2111
2112 /*
2113  * lookup an association by an ASCONF lookup address.
2114  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2115  */
2116 struct sctp_tcb *
2117 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2118     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2119 {
2120         struct sctp_tcb *stcb;
2121         struct sockaddr_in *sin;
2122
2123 #ifdef INET6
2124         struct sockaddr_in6 *sin6;
2125
2126 #endif
2127         struct sockaddr_storage local_store, remote_store;
2128         struct sockaddr *to;
2129         struct ip *iph;
2130
2131 #ifdef INET6
2132         struct ip6_hdr *ip6;
2133
2134 #endif
2135         struct sctp_paramhdr parm_buf, *phdr;
2136         int ptype;
2137         int zero_address = 0;
2138
2139
2140         memset(&local_store, 0, sizeof(local_store));
2141         memset(&remote_store, 0, sizeof(remote_store));
2142         to = (struct sockaddr *)&local_store;
2143         /* First get the destination address setup too. */
2144         iph = mtod(m, struct ip *);
2145         switch (iph->ip_v) {
2146         case IPVERSION:
2147                 /* its IPv4 */
2148                 sin = (struct sockaddr_in *)&local_store;
2149                 sin->sin_family = AF_INET;
2150                 sin->sin_len = sizeof(*sin);
2151                 sin->sin_port = sh->dest_port;
2152                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2153                 break;
2154 #ifdef INET6
2155         case IPV6_VERSION >> 4:
2156                 /* its IPv6 */
2157                 ip6 = mtod(m, struct ip6_hdr *);
2158                 sin6 = (struct sockaddr_in6 *)&local_store;
2159                 sin6->sin6_family = AF_INET6;
2160                 sin6->sin6_len = sizeof(*sin6);
2161                 sin6->sin6_port = sh->dest_port;
2162                 sin6->sin6_addr = ip6->ip6_dst;
2163                 break;
2164 #endif
2165         default:
2166                 return NULL;
2167         }
2168
2169         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2170             &parm_buf, sizeof(struct sctp_paramhdr));
2171         if (phdr == NULL) {
2172                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2173                     __FUNCTION__);
2174                 return NULL;
2175         }
2176         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2177         /* get the correlation address */
2178         switch (ptype) {
2179 #ifdef INET6
2180         case SCTP_IPV6_ADDRESS:
2181                 {
2182                         /* ipv6 address param */
2183                         struct sctp_ipv6addr_param *p6, p6_buf;
2184
2185                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2186                                 return NULL;
2187                         }
2188                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2189                             offset + sizeof(struct sctp_asconf_chunk),
2190                             &p6_buf.ph, sizeof(*p6));
2191                         if (p6 == NULL) {
2192                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2193                                     __FUNCTION__);
2194                                 return (NULL);
2195                         }
2196                         sin6 = (struct sockaddr_in6 *)&remote_store;
2197                         sin6->sin6_family = AF_INET6;
2198                         sin6->sin6_len = sizeof(*sin6);
2199                         sin6->sin6_port = sh->src_port;
2200                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2201                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2202                                 zero_address = 1;
2203                         break;
2204                 }
2205 #endif
2206         case SCTP_IPV4_ADDRESS:
2207                 {
2208                         /* ipv4 address param */
2209                         struct sctp_ipv4addr_param *p4, p4_buf;
2210
2211                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2212                                 return NULL;
2213                         }
2214                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2215                             offset + sizeof(struct sctp_asconf_chunk),
2216                             &p4_buf.ph, sizeof(*p4));
2217                         if (p4 == NULL) {
2218                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2219                                     __FUNCTION__);
2220                                 return (NULL);
2221                         }
2222                         sin = (struct sockaddr_in *)&remote_store;
2223                         sin->sin_family = AF_INET;
2224                         sin->sin_len = sizeof(*sin);
2225                         sin->sin_port = sh->src_port;
2226                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2227                         if (sin->sin_addr.s_addr == INADDR_ANY)
2228                                 zero_address = 1;
2229                         break;
2230                 }
2231         default:
2232                 /* invalid address param type */
2233                 return NULL;
2234         }
2235
2236         if (zero_address) {
2237                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2238                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2239                 /*
2240                  * printf("findassociation_ep_asconf: zero lookup address
2241                  * finds stcb 0x%x\n", (uint32_t)stcb);
2242                  */
2243         } else {
2244                 stcb = sctp_findassociation_ep_addr(inp_p,
2245                     (struct sockaddr *)&remote_store, netp,
2246                     to, NULL);
2247         }
2248         return (stcb);
2249 }
2250
2251
2252 /*
2253  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2254  * addresses. This way if we don't get a bind we by default pick a ephemeral
2255  * port with all addresses bound.
2256  */
2257 int
2258 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2259 {
2260         /*
2261          * we get called when a new endpoint starts up. We need to allocate
2262          * the sctp_inpcb structure from the zone and init it. Mark it as
2263          * unbound and find a port that we can use as an ephemeral with
2264          * INADDR_ANY. If the user binds later no problem we can then add in
2265          * the specific addresses. And setup the default parameters for the
2266          * EP.
2267          */
2268         int i, error;
2269         struct sctp_inpcb *inp;
2270         struct sctp_pcb *m;
2271         struct timeval time;
2272         sctp_sharedkey_t *null_key;
2273
2274         error = 0;
2275
2276         SCTP_INP_INFO_WLOCK();
2277         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2278         if (inp == NULL) {
2279                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2280                 SCTP_INP_INFO_WUNLOCK();
2281                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2282                 return (ENOBUFS);
2283         }
2284         /* zap it */
2285         bzero(inp, sizeof(*inp));
2286
2287         /* bump generations */
2288         /* setup socket pointers */
2289         inp->sctp_socket = so;
2290         inp->ip_inp.inp.inp_socket = so;
2291         inp->sctp_associd_counter = 1;
2292         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2293         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2294         /* init the small hash table we use to track asocid <-> tcb */
2295         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2296         if (inp->sctp_asocidhash == NULL) {
2297                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2298                 SCTP_INP_INFO_WUNLOCK();
2299                 return (ENOBUFS);
2300         }
2301 #ifdef IPSEC
2302         {
2303                 struct inpcbpolicy *pcb_sp = NULL;
2304
2305                 error = ipsec_init_policy(so, &pcb_sp);
2306                 /* Arrange to share the policy */
2307                 inp->ip_inp.inp.inp_sp = pcb_sp;
2308                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2309         }
2310         if (error != 0) {
2311                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2312                 SCTP_INP_INFO_WUNLOCK();
2313                 return error;
2314         }
2315 #endif                          /* IPSEC */
2316         SCTP_INCR_EP_COUNT();
2317         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2318         SCTP_INP_INFO_WUNLOCK();
2319
2320         so->so_pcb = (caddr_t)inp;
2321
2322         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2323             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2324                 /* UDP style socket */
2325                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2326                     SCTP_PCB_FLAGS_UNBOUND);
2327                 /* Be sure it is NON-BLOCKING IO for UDP */
2328                 /* SCTP_SET_SO_NBIO(so); */
2329         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2330                 /* TCP style socket */
2331                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2332                     SCTP_PCB_FLAGS_UNBOUND);
2333                 /* Be sure we have blocking IO by default */
2334                 SCTP_CLEAR_SO_NBIO(so);
2335         } else {
2336                 /*
2337                  * unsupported socket type (RAW, etc)- in case we missed it
2338                  * in protosw
2339                  */
2340                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2341                 so->so_pcb = NULL;
2342                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2343                 return (EOPNOTSUPP);
2344         }
2345         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2346                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2347                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2348         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2349                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2350                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2351         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2352                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2353                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2354         }
2355         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2356             &inp->sctp_hashmark);
2357         if (inp->sctp_tcbhash == NULL) {
2358                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2359                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2360                 so->so_pcb = NULL;
2361                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2362                 return (ENOBUFS);
2363         }
2364         inp->def_vrf_id = vrf_id;
2365
2366         SCTP_INP_INFO_WLOCK();
2367         SCTP_INP_LOCK_INIT(inp);
2368         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2369         SCTP_INP_READ_INIT(inp);
2370         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2371         /* lock the new ep */
2372         SCTP_INP_WLOCK(inp);
2373
2374         /* add it to the info area */
2375         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2376         SCTP_INP_INFO_WUNLOCK();
2377
2378         TAILQ_INIT(&inp->read_queue);
2379         LIST_INIT(&inp->sctp_addr_list);
2380
2381         LIST_INIT(&inp->sctp_asoc_list);
2382
2383 #ifdef SCTP_TRACK_FREED_ASOCS
2384         /* TEMP CODE */
2385         LIST_INIT(&inp->sctp_asoc_free_list);
2386 #endif
2387         /* Init the timer structure for signature change */
2388         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2389         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2390
2391         /* now init the actual endpoint default data */
2392         m = &inp->sctp_ep;
2393
2394         /* setup the base timeout information */
2395         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2396         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2397         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2398         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2399         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2400         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2401         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2402         /* all max/min max are in ms */
2403         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2404         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2405         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2406         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2407         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2408
2409         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2410
2411         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2412         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2413         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2414         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2415         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2416         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2417         if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
2418             (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
2419                 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2420         } else {
2421                 /* sysctl done with invalid value, set to 2581 */
2422                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2423         }
2424         /* number of streams to pre-open on a association */
2425         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2426
2427         /* Add adaptation cookie */
2428         m->adaptation_layer_indicator = 0x504C5253;
2429
2430         /* seed random number generator */
2431         m->random_counter = 1;
2432         m->store_at = SCTP_SIGNATURE_SIZE;
2433         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2434         sctp_fill_random_store(m);
2435
2436         /* Minimum cookie size */
2437         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2438             sizeof(struct sctp_state_cookie);
2439         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2440
2441         /* Setup the initial secret */
2442         (void)SCTP_GETTIME_TIMEVAL(&time);
2443         m->time_of_secret_change = time.tv_sec;
2444
2445         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2446                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2447         }
2448         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2449
2450         /* How long is a cookie good for ? */
2451         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2452         /*
2453          * Initialize authentication parameters
2454          */
2455         m->local_hmacs = sctp_default_supported_hmaclist();
2456         m->local_auth_chunks = sctp_alloc_chunklist();
2457         sctp_auth_set_default_chunks(m->local_auth_chunks);
2458         LIST_INIT(&m->shared_keys);
2459         /* add default NULL key as key id 0 */
2460         null_key = sctp_alloc_sharedkey();
2461         sctp_insert_sharedkey(&m->shared_keys, null_key);
2462         SCTP_INP_WUNLOCK(inp);
2463 #ifdef SCTP_LOG_CLOSING
2464         sctp_log_closing(inp, NULL, 12);
2465 #endif
2466         return (error);
2467 }
2468
2469
2470 void
2471 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2472     struct sctp_tcb *stcb)
2473 {
2474         struct sctp_nets *net;
2475         uint16_t lport, rport;
2476         struct sctppcbhead *head;
2477         struct sctp_laddr *laddr, *oladdr;
2478
2479         atomic_add_int(&stcb->asoc.refcnt, 1);
2480         SCTP_TCB_UNLOCK(stcb);
2481         SCTP_INP_INFO_WLOCK();
2482         SCTP_INP_WLOCK(old_inp);
2483         SCTP_INP_WLOCK(new_inp);
2484         SCTP_TCB_LOCK(stcb);
2485         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2486
2487         new_inp->sctp_ep.time_of_secret_change =
2488             old_inp->sctp_ep.time_of_secret_change;
2489         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2490             sizeof(old_inp->sctp_ep.secret_key));
2491         new_inp->sctp_ep.current_secret_number =
2492             old_inp->sctp_ep.current_secret_number;
2493         new_inp->sctp_ep.last_secret_number =
2494             old_inp->sctp_ep.last_secret_number;
2495         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2496
2497         /* make it so new data pours into the new socket */
2498         stcb->sctp_socket = new_inp->sctp_socket;
2499         stcb->sctp_ep = new_inp;
2500
2501         /* Copy the port across */
2502         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2503         rport = stcb->rport;
2504         /* Pull the tcb from the old association */
2505         LIST_REMOVE(stcb, sctp_tcbhash);
2506         LIST_REMOVE(stcb, sctp_tcblist);
2507         if (stcb->asoc.in_asocid_hash) {
2508                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2509         }
2510         /* Now insert the new_inp into the TCP connected hash */
2511         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2512             SCTP_BASE_INFO(hashtcpmark))];
2513
2514         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2515         /* Its safe to access */
2516         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2517
2518         /* Now move the tcb into the endpoint list */
2519         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2520         /*
2521          * Question, do we even need to worry about the ep-hash since we
2522          * only have one connection? Probably not :> so lets get rid of it
2523          * and not suck up any kernel memory in that.
2524          */
2525         if (stcb->asoc.in_asocid_hash) {
2526                 struct sctpasochead *lhd;
2527
2528                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2529                     new_inp->hashasocidmark)];
2530                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2531         }
2532         /* Ok. Let's restart timer. */
2533         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2534                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2535                     stcb, net);
2536         }
2537
2538         SCTP_INP_INFO_WUNLOCK();
2539         if (new_inp->sctp_tcbhash != NULL) {
2540                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2541                 new_inp->sctp_tcbhash = NULL;
2542         }
2543         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2544                 /* Subset bound, so copy in the laddr list from the old_inp */
2545                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2546                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2547                         if (laddr == NULL) {
2548                                 /*
2549                                  * Gak, what can we do? This assoc is really
2550                                  * HOSED. We probably should send an abort
2551                                  * here.
2552                                  */
2553                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2554                                 continue;
2555                         }
2556                         SCTP_INCR_LADDR_COUNT();
2557                         bzero(laddr, sizeof(*laddr));
2558                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2559                         laddr->ifa = oladdr->ifa;
2560                         atomic_add_int(&laddr->ifa->refcount, 1);
2561                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2562                             sctp_nxt_addr);
2563                         new_inp->laddr_count++;
2564                 }
2565         }
2566         /*
2567          * Now any running timers need to be adjusted since we really don't
2568          * care if they are running or not just blast in the new_inp into
2569          * all of them.
2570          */
2571
2572         stcb->asoc.hb_timer.ep = (void *)new_inp;
2573         stcb->asoc.dack_timer.ep = (void *)new_inp;
2574         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2575         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2576         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2577         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2578         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2579         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2580         /* now what about the nets? */
2581         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2582                 net->pmtu_timer.ep = (void *)new_inp;
2583                 net->rxt_timer.ep = (void *)new_inp;
2584                 net->fr_timer.ep = (void *)new_inp;
2585         }
2586         SCTP_INP_WUNLOCK(new_inp);
2587         SCTP_INP_WUNLOCK(old_inp);
2588 }
2589
2590
2591
2592
2593 /* sctp_ifap is used to bypass normal local address validation checks */
2594 int
2595 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2596     struct sctp_ifa *sctp_ifap, struct thread *p)
2597 {
2598         /* bind a ep to a socket address */
2599         struct sctppcbhead *head;
2600         struct sctp_inpcb *inp, *inp_tmp;
2601         struct inpcb *ip_inp;
2602         int port_reuse_active = 0;
2603         int bindall;
2604         uint16_t lport;
2605         int error;
2606         uint32_t vrf_id;
2607
2608         lport = 0;
2609         error = 0;
2610         bindall = 1;
2611         inp = (struct sctp_inpcb *)so->so_pcb;
2612         ip_inp = (struct inpcb *)so->so_pcb;
2613 #ifdef SCTP_DEBUG
2614         if (addr) {
2615                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2616                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2617                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2618                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2619         }
2620 #endif
2621         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2622                 /* already did a bind, subsequent binds NOT allowed ! */
2623                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2624                 return (EINVAL);
2625         }
2626 #ifdef INVARIANTS
2627         if (p == NULL)
2628                 panic("null proc/thread");
2629 #endif
2630         if (addr != NULL) {
2631                 switch (addr->sa_family) {
2632                 case AF_INET:
2633                         {
2634                                 struct sockaddr_in *sin;
2635
2636                                 /* IPV6_V6ONLY socket? */
2637                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2638                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2639                                         return (EINVAL);
2640                                 }
2641                                 if (addr->sa_len != sizeof(*sin)) {
2642                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2643                                         return (EINVAL);
2644                                 }
2645                                 sin = (struct sockaddr_in *)addr;
2646                                 lport = sin->sin_port;
2647                                 /*
2648                                  * For LOOPBACK the prison_local_ip4() call
2649                                  * will transmute the ip address to the
2650                                  * proper value.
2651                                  */
2652                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2653                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2654                                         return (error);
2655                                 }
2656                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2657                                         bindall = 0;
2658                                 }
2659                                 break;
2660                         }
2661 #ifdef INET6
2662                 case AF_INET6:
2663                         {
2664                                 /*
2665                                  * Only for pure IPv6 Address. (No IPv4
2666                                  * Mapped!)
2667                                  */
2668                                 struct sockaddr_in6 *sin6;
2669
2670                                 sin6 = (struct sockaddr_in6 *)addr;
2671
2672                                 if (addr->sa_len != sizeof(*sin6)) {
2673                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2674                                         return (EINVAL);
2675                                 }
2676                                 lport = sin6->sin6_port;
2677
2678                                 /*
2679                                  * For LOOPBACK the prison_local_ip6() call
2680                                  * will transmute the ipv6 address to the
2681                                  * proper value.
2682                                  */
2683                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2684                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2685                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2686                                         return (error);
2687                                 }
2688                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2689                                         bindall = 0;
2690                                         /* KAME hack: embed scopeid */
2691                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2692                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2693                                                 return (EINVAL);
2694                                         }
2695                                 }
2696                                 /* this must be cleared for ifa_ifwithaddr() */
2697                                 sin6->sin6_scope_id = 0;
2698                                 break;
2699                         }
2700 #endif
2701                 default:
2702                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2703                         return (EAFNOSUPPORT);
2704                 }
2705         }
2706         SCTP_INP_INFO_WLOCK();
2707         SCTP_INP_WLOCK(inp);
2708         /* Setup a vrf_id to be the default for the non-bind-all case. */
2709         vrf_id = inp->def_vrf_id;
2710
2711         /* increase our count due to the unlock we do */
2712         SCTP_INP_INCR_REF(inp);
2713         if (lport) {
2714                 /*
2715                  * Did the caller specify a port? if so we must see if a ep
2716                  * already has this one bound.
2717                  */
2718                 /* got to be root to get at low ports */
2719                 if (ntohs(lport) < IPPORT_RESERVED) {
2720                         if (p && (error =
2721                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2722                             )) {
2723                                 SCTP_INP_DECR_REF(inp);
2724                                 SCTP_INP_WUNLOCK(inp);
2725                                 SCTP_INP_INFO_WUNLOCK();
2726                                 return (error);
2727                         }
2728                 }
2729                 if (p == NULL) {
2730                         SCTP_INP_DECR_REF(inp);
2731                         SCTP_INP_WUNLOCK(inp);
2732                         SCTP_INP_INFO_WUNLOCK();
2733                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2734                         return (error);
2735                 }
2736                 SCTP_INP_WUNLOCK(inp);
2737                 if (bindall) {
2738                         vrf_id = inp->def_vrf_id;
2739                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2740                         if (inp_tmp != NULL) {
2741                                 /*
2742                                  * lock guy returned and lower count note
2743                                  * that we are not bound so inp_tmp should
2744                                  * NEVER be inp. And it is this inp
2745                                  * (inp_tmp) that gets the reference bump,
2746                                  * so we must lower it.
2747                                  */
2748                                 SCTP_INP_DECR_REF(inp_tmp);
2749                                 /* unlock info */
2750                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2751                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2752                                         /*
2753                                          * Ok, must be one-2-one and
2754                                          * allowing port re-use
2755                                          */
2756                                         port_reuse_active = 1;
2757                                         goto continue_anyway;
2758                                 }
2759                                 SCTP_INP_DECR_REF(inp);
2760                                 SCTP_INP_INFO_WUNLOCK();
2761                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2762                                 return (EADDRINUSE);
2763                         }
2764                 } else {
2765                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2766                         if (inp_tmp != NULL) {
2767                                 /*
2768                                  * lock guy returned and lower count note
2769                                  * that we are not bound so inp_tmp should
2770                                  * NEVER be inp. And it is this inp
2771                                  * (inp_tmp) that gets the reference bump,
2772                                  * so we must lower it.
2773                                  */
2774                                 SCTP_INP_DECR_REF(inp_tmp);
2775                                 /* unlock info */
2776                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2777                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2778                                         /*
2779                                          * Ok, must be one-2-one and
2780                                          * allowing port re-use
2781                                          */
2782                                         port_reuse_active = 1;
2783                                         goto continue_anyway;
2784                                 }
2785                                 SCTP_INP_DECR_REF(inp);
2786                                 SCTP_INP_INFO_WUNLOCK();
2787                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2788                                 return (EADDRINUSE);
2789                         }
2790                 }
2791 continue_anyway:
2792                 SCTP_INP_WLOCK(inp);
2793                 if (bindall) {
2794                         /* verify that no lport is not used by a singleton */
2795                         if ((port_reuse_active == 0) &&
2796                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2797                             ) {
2798                                 /* Sorry someone already has this one bound */
2799                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2800                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2801                                         port_reuse_active = 1;
2802                                 } else {
2803                                         SCTP_INP_DECR_REF(inp);
2804                                         SCTP_INP_WUNLOCK(inp);
2805                                         SCTP_INP_INFO_WUNLOCK();
2806                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2807                                         return (EADDRINUSE);
2808                                 }
2809                         }
2810                 }
2811         } else {
2812                 uint16_t first, last, candidate;
2813                 uint16_t count;
2814                 int done;
2815
2816                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2817                         first = MODULE_GLOBAL(ipport_hifirstauto);
2818                         last = MODULE_GLOBAL(ipport_hilastauto);
2819                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2820                         if (p && (error =
2821                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2822                             )) {
2823                                 SCTP_INP_DECR_REF(inp);
2824                                 SCTP_INP_WUNLOCK(inp);
2825                                 SCTP_INP_INFO_WUNLOCK();
2826                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2827                                 return (error);
2828                         }
2829                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2830                         last = MODULE_GLOBAL(ipport_lowlastauto);
2831                 } else {
2832                         first = MODULE_GLOBAL(ipport_firstauto);
2833                         last = MODULE_GLOBAL(ipport_lastauto);
2834                 }
2835                 if (first > last) {
2836                         uint16_t temp;
2837
2838                         temp = first;
2839                         first = last;
2840                         last = temp;
2841                 }
2842                 count = last - first + 1;       /* number of candidates */
2843                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2844
2845                 done = 0;
2846                 while (!done) {
2847                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2848                                 done = 1;
2849                         }
2850                         if (!done) {
2851                                 if (--count == 0) {
2852                                         SCTP_INP_DECR_REF(inp);
2853                                         SCTP_INP_WUNLOCK(inp);
2854                                         SCTP_INP_INFO_WUNLOCK();
2855                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2856                                         return (EADDRINUSE);
2857                                 }
2858                                 if (candidate == last)
2859                                         candidate = first;
2860                                 else
2861                                         candidate = candidate + 1;
2862                         }
2863                 }
2864                 lport = htons(candidate);
2865         }
2866         SCTP_INP_DECR_REF(inp);
2867         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2868             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2869                 /*
2870                  * this really should not happen. The guy did a non-blocking
2871                  * bind and then did a close at the same time.
2872                  */
2873                 SCTP_INP_WUNLOCK(inp);
2874                 SCTP_INP_INFO_WUNLOCK();
2875                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2876                 return (EINVAL);
2877         }
2878         /* ok we look clear to give out this port, so lets setup the binding */
2879         if (bindall) {
2880                 /* binding to all addresses, so just set in the proper flags */
2881                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2882                 /* set the automatic addr changes from kernel flag */
2883                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2884                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2885                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2886                 } else {
2887                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2888                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2889                 }
2890                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2891                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2892                 } else {
2893                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2894                 }
2895                 /*
2896                  * set the automatic mobility_base from kernel flag (by
2897                  * micchie)
2898                  */
2899                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2900                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2901                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2902                 } else {
2903                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2904                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2905                 }
2906                 /*
2907                  * set the automatic mobility_fasthandoff from kernel flag
2908                  * (by micchie)
2909                  */
2910                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
2911                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2912                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2913                 } else {
2914                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2915                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2916                 }
2917         } else {
2918                 /*
2919                  * bind specific, make sure flags is off and add a new
2920                  * address structure to the sctp_addr_list inside the ep
2921                  * structure.
2922                  *
2923                  * We will need to allocate one and insert it at the head. The
2924                  * socketopt call can just insert new addresses in there as
2925                  * well. It will also have to do the embed scope kame hack
2926                  * too (before adding).
2927                  */
2928                 struct sctp_ifa *ifa;
2929                 struct sockaddr_storage store_sa;
2930
2931                 memset(&store_sa, 0, sizeof(store_sa));
2932                 if (addr->sa_family == AF_INET) {
2933                         struct sockaddr_in *sin;
2934
2935                         sin = (struct sockaddr_in *)&store_sa;
2936                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2937                         sin->sin_port = 0;
2938                 } else if (addr->sa_family == AF_INET6) {
2939                         struct sockaddr_in6 *sin6;
2940
2941                         sin6 = (struct sockaddr_in6 *)&store_sa;
2942                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2943                         sin6->sin6_port = 0;
2944                 }
2945                 /*
2946                  * first find the interface with the bound address need to
2947                  * zero out the port to find the address! yuck! can't do
2948                  * this earlier since need port for sctp_pcb_findep()
2949                  */
2950                 if (sctp_ifap != NULL)
2951                         ifa = sctp_ifap;
2952                 else {
2953                         /*
2954                          * Note for BSD we hit here always other O/S's will
2955                          * pass things in via the sctp_ifap argument
2956                          * (Panda).
2957                          */
2958                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2959                             vrf_id, SCTP_ADDR_NOT_LOCKED);
2960                 }
2961                 if (ifa == NULL) {
2962                         /* Can't find an interface with that address */
2963                         SCTP_INP_WUNLOCK(inp);
2964                         SCTP_INP_INFO_WUNLOCK();
2965                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2966                         return (EADDRNOTAVAIL);
2967                 }
2968                 if (addr->sa_family == AF_INET6) {
2969                         /* GAK, more FIXME IFA lock? */
2970                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2971                                 /* Can't bind a non-existent addr. */
2972                                 SCTP_INP_WUNLOCK(inp);
2973                                 SCTP_INP_INFO_WUNLOCK();
2974                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2975                                 return (EINVAL);
2976                         }
2977                 }
2978                 /* we're not bound all */
2979                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2980                 /* allow bindx() to send ASCONF's for binding changes */
2981                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2982                 /* clear automatic addr changes from kernel flag */
2983                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2984
2985                 /* add this address to the endpoint list */
2986                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2987                 if (error != 0) {
2988                         SCTP_INP_WUNLOCK(inp);
2989                         SCTP_INP_INFO_WUNLOCK();
2990                         return (error);
2991                 }
2992                 inp->laddr_count++;
2993         }
2994         /* find the bucket */
2995         if (port_reuse_active) {
2996                 /* Put it into tcp 1-2-1 hash */
2997                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2998                     SCTP_BASE_INFO(hashtcpmark))];
2999                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3000         } else {
3001                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
3002                     SCTP_BASE_INFO(hashmark))];
3003         }
3004         /* put it in the bucket */
3005         LIST_INSERT_HEAD(head, inp, sctp_hash);
3006         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3007             head, ntohs(lport), port_reuse_active);
3008         /* set in the port */
3009         inp->sctp_lport = lport;
3010
3011         /* turn off just the unbound flag */
3012         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3013         SCTP_INP_WUNLOCK(inp);
3014         SCTP_INP_INFO_WUNLOCK();
3015         return (0);
3016 }
3017
3018
3019 static void
3020 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3021 {
3022         struct sctp_iterator *it, *nit;
3023
3024         /*
3025          * We enter with the only the ITERATOR_LOCK in place and a write
3026          * lock on the inp_info stuff.
3027          */
3028         it = sctp_it_ctl.cur_it;
3029         if (it && (it->vn != curvnet)) {
3030                 /* Its not looking at our VNET */
3031                 return;
3032         }
3033         if (it && (it->inp == inp)) {
3034                 /*
3035                  * This is tricky and we hold the iterator lock, but when it
3036                  * returns and gets the lock (when we release it) the
3037                  * iterator will try to operate on inp. We need to stop that
3038                  * from happening. But of course the iterator has a
3039                  * reference on the stcb and inp. We can mark it and it will
3040                  * stop.
3041                  *
3042                  * If its a single iterator situation, we set the end iterator
3043                  * flag. Otherwise we set the iterator to go to the next
3044                  * inp.
3045                  *
3046                  */
3047                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3048                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3049                 } else {
3050                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3051                 }
3052         }
3053         /*
3054          * Now go through and remove any single reference to our inp that
3055          * may be still pending on the list
3056          */
3057         SCTP_IPI_ITERATOR_WQ_LOCK();
3058         it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
3059         while (it) {
3060                 nit = TAILQ_NEXT(it, sctp_nxt_itr);
3061                 if (it->vn != curvnet) {
3062                         it = nit;
3063                         continue;
3064                 }
3065                 if (it->inp == inp) {
3066                         /* This one points to me is it inp specific? */
3067                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3068                                 /* Remove and free this one */
3069                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3070                                     it, sctp_nxt_itr);
3071                                 if (it->function_atend != NULL) {
3072                                         (*it->function_atend) (it->pointer, it->val);
3073                                 }
3074                                 SCTP_FREE(it, SCTP_M_ITER);
3075                         } else {
3076                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3077                         }
3078                         /*
3079                          * When its put in the refcnt is incremented so decr
3080                          * it
3081                          */
3082                         SCTP_INP_DECR_REF(inp);
3083                 }
3084                 it = nit;
3085         }
3086         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3087 }
3088
3089 /* release sctp_inpcb unbind the port */
3090 void
3091 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3092 {
3093         /*
3094          * Here we free a endpoint. We must find it (if it is in the Hash
3095          * table) and remove it from there. Then we must also find it in the
3096          * overall list and remove it from there. After all removals are
3097          * complete then any timer has to be stopped. Then start the actual
3098          * freeing. a) Any local lists. b) Any associations. c) The hash of
3099          * all associations. d) finally the ep itself.
3100          */
3101         struct sctp_pcb *m;
3102         struct sctp_tcb *asoc, *nasoc;
3103         struct sctp_laddr *laddr, *nladdr;
3104         struct inpcb *ip_pcb;
3105         struct socket *so;
3106         int being_refed = 0;
3107         struct sctp_queued_to_read *sq;
3108
3109
3110         int cnt;
3111         sctp_sharedkey_t *shared_key;
3112
3113
3114 #ifdef SCTP_LOG_CLOSING
3115         sctp_log_closing(inp, NULL, 0);
3116 #endif
3117         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3118                 /*
3119                  * Once we are in we can remove the flag from = 1 is only
3120                  * passed from the actual closing routines that are called
3121                  * via the sockets layer.
3122                  */
3123                 SCTP_ITERATOR_LOCK();
3124                 /* mark any iterators on the list or being processed */
3125                 sctp_iterator_inp_being_freed(inp);
3126                 SCTP_ITERATOR_UNLOCK();
3127         }
3128         so = inp->sctp_socket;
3129         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3130                 /* been here before.. eeks.. get out of here */
3131                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3132 #ifdef SCTP_LOG_CLOSING
3133                 sctp_log_closing(inp, NULL, 1);
3134 #endif
3135                 return;
3136         }
3137         SCTP_ASOC_CREATE_LOCK(inp);
3138         SCTP_INP_INFO_WLOCK();
3139
3140         SCTP_INP_WLOCK(inp);
3141         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3142                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3143                 /* socket is gone, so no more wakeups allowed */
3144                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3145                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3146                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3147
3148         }
3149         /* First time through we have the socket lock, after that no more. */
3150         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3151             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3152
3153         if (inp->control) {
3154                 sctp_m_freem(inp->control);
3155                 inp->control = NULL;
3156         }
3157         if (inp->pkt) {
3158                 sctp_m_freem(inp->pkt);
3159                 inp->pkt = NULL;
3160         }
3161         m = &inp->sctp_ep;
3162         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3163                                          * here but I will be nice :> (i.e.
3164                                          * ip_pcb = ep;) */
3165         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3166                 int cnt_in_sd;
3167
3168                 cnt_in_sd = 0;
3169                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3170                     asoc = nasoc) {
3171                         SCTP_TCB_LOCK(asoc);
3172                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
3173                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3174                                 /* Skip guys being freed */
3175                                 cnt_in_sd++;
3176                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3177                                         /*
3178                                          * Special case - we did not start a
3179                                          * kill timer on the asoc due to it
3180                                          * was not closed. So go ahead and
3181                                          * start it now.
3182                                          */
3183                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3184                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3185                                 }
3186                                 SCTP_TCB_UNLOCK(asoc);
3187                                 continue;
3188                         }
3189                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3190                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3191                             (asoc->asoc.total_output_queue_size == 0)) {
3192                                 /*
3193                                  * If we have data in queue, we don't want
3194                                  * to just free since the app may have done,
3195                                  * send()/close or connect/send/close. And
3196                                  * it wants the data to get across first.
3197                                  */
3198                                 /* Just abandon things in the front states */
3199                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3200                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3201                                         cnt_in_sd++;
3202                                 }
3203                                 continue;
3204                         }
3205                         /* Disconnect the socket please */
3206                         asoc->sctp_socket = NULL;
3207                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3208                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3209                             (asoc->asoc.control_pdapi) ||
3210                             (asoc->asoc.size_on_all_streams > 0) ||
3211                             (so && (so->so_rcv.sb_cc > 0))
3212                             ) {
3213                                 /* Left with Data unread */
3214                                 struct mbuf *op_err;
3215
3216                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3217                                     0, M_DONTWAIT, 1, MT_DATA);
3218                                 if (op_err) {
3219                                         /* Fill in the user initiated abort */
3220                                         struct sctp_paramhdr *ph;
3221                                         uint32_t *ippp;
3222
3223                                         SCTP_BUF_LEN(op_err) =
3224                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3225                                         ph = mtod(op_err,
3226                                             struct sctp_paramhdr *);
3227                                         ph->param_type = htons(
3228                                             SCTP_CAUSE_USER_INITIATED_ABT);
3229                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3230                                         ippp = (uint32_t *) (ph + 1);
3231                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3232                                 }
3233                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3234 #if defined(SCTP_PANIC_ON_ABORT)
3235                                 panic("inpcb_free does an abort");
3236 #endif
3237                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3238                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3239                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3240                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3241                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3242                                 }
3243                                 if (sctp_free_assoc(inp, asoc,
3244                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3245                                         cnt_in_sd++;
3246                                 }
3247                                 continue;
3248                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3249                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3250                                     (asoc->asoc.stream_queue_cnt == 0)
3251                             ) {
3252                                 if (asoc->asoc.locked_on_sending) {
3253                                         goto abort_anyway;
3254                                 }
3255                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3256                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3257                                         /*
3258                                          * there is nothing queued to send,
3259                                          * so I send shutdown
3260                                          */
3261                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3262                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3263                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3264                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3265                                         }
3266                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3267                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3268                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3269                                             asoc->asoc.primary_destination);
3270                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3271                                             asoc->asoc.primary_destination);
3272                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3273                                 }
3274                         } else {
3275                                 /* mark into shutdown pending */
3276                                 struct sctp_stream_queue_pending *sp;
3277
3278                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3279                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3280                                     asoc->asoc.primary_destination);
3281                                 if (asoc->asoc.locked_on_sending) {
3282                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3283                                             sctp_streamhead);
3284                                         if (sp == NULL) {
3285                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3286                                                     asoc->asoc.locked_on_sending,
3287                                                     asoc->asoc.locked_on_sending->stream_no);
3288                                         } else {
3289                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3290                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3291                                         }
3292                                 }
3293                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3294                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3295                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3296                                         struct mbuf *op_err;
3297
3298                         abort_anyway:
3299                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3300                                             0, M_DONTWAIT, 1, MT_DATA);
3301                                         if (op_err) {
3302                                                 /*
3303                                                  * Fill in the user
3304                                                  * initiated abort
3305                                                  */
3306                                                 struct sctp_paramhdr *ph;
3307                                                 uint32_t *ippp;
3308
3309                                                 SCTP_BUF_LEN(op_err) =
3310                                                     (sizeof(struct sctp_paramhdr) +
3311                                                     sizeof(uint32_t));
3312                                                 ph = mtod(op_err,
3313                                                     struct sctp_paramhdr *);
3314                                                 ph->param_type = htons(
3315                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3316                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3317                                                 ippp = (uint32_t *) (ph + 1);
3318                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3319                                         }
3320                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3321 #if defined(SCTP_PANIC_ON_ABORT)
3322                                         panic("inpcb_free does an abort");
3323 #endif
3324
3325                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3326                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3327                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3328                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3329                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3330                                         }
3331                                         if (sctp_free_assoc(inp, asoc,
3332                                             SCTP_PCBFREE_NOFORCE,
3333                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3334                                                 cnt_in_sd++;
3335                                         }
3336                                         continue;
3337                                 } else {
3338                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3339                                 }
3340                         }
3341                         cnt_in_sd++;
3342                         SCTP_TCB_UNLOCK(asoc);
3343                 }
3344                 /* now is there some left in our SHUTDOWN state? */
3345                 if (cnt_in_sd) {
3346 #ifdef SCTP_LOG_CLOSING
3347                         sctp_log_closing(inp, NULL, 2);
3348 #endif
3349                         inp->sctp_socket = NULL;
3350                         SCTP_INP_WUNLOCK(inp);
3351                         SCTP_ASOC_CREATE_UNLOCK(inp);
3352                         SCTP_INP_INFO_WUNLOCK();
3353                         return;
3354                 }
3355         }
3356         inp->sctp_socket = NULL;
3357         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3358             SCTP_PCB_FLAGS_UNBOUND) {
3359                 /*
3360                  * ok, this guy has been bound. It's port is somewhere in
3361                  * the SCTP_BASE_INFO(hash table). Remove it!
3362                  */
3363                 LIST_REMOVE(inp, sctp_hash);
3364                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3365         }
3366         /*
3367          * If there is a timer running to kill us, forget it, since it may
3368          * have a contest on the INP lock.. which would cause us to die ...
3369          */
3370         cnt = 0;
3371         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3372             asoc = nasoc) {
3373                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3374                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3375                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3376                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3377                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3378                         }
3379                         cnt++;
3380                         continue;
3381                 }
3382                 /* Free associations that are NOT killing us */
3383                 SCTP_TCB_LOCK(asoc);
3384                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3385                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3386                         struct mbuf *op_err;
3387                         uint32_t *ippp;
3388
3389                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3390                             0, M_DONTWAIT, 1, MT_DATA);
3391                         if (op_err) {
3392                                 /* Fill in the user initiated abort */
3393                                 struct sctp_paramhdr *ph;
3394
3395                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3396                                     sizeof(uint32_t));
3397                                 ph = mtod(op_err, struct sctp_paramhdr *);
3398                                 ph->param_type = htons(
3399                                     SCTP_CAUSE_USER_INITIATED_ABT);
3400                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3401                                 ippp = (uint32_t *) (ph + 1);
3402                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3403
3404                         }
3405                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3406 #if defined(SCTP_PANIC_ON_ABORT)
3407                         panic("inpcb_free does an abort");
3408 #endif
3409                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3410                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3411                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3412                         cnt++;
3413                         SCTP_TCB_UNLOCK(asoc);
3414                         continue;
3415                 }
3416                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3417                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3418                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3419                 }
3420                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3421                         cnt++;
3422                 }
3423         }
3424         if (cnt) {
3425                 /* Ok we have someone out there that will kill us */
3426                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3427 #ifdef SCTP_LOG_CLOSING
3428                 sctp_log_closing(inp, NULL, 3);
3429 #endif
3430                 SCTP_INP_WUNLOCK(inp);
3431                 SCTP_ASOC_CREATE_UNLOCK(inp);
3432                 SCTP_INP_INFO_WUNLOCK();
3433                 return;
3434         }
3435         if (SCTP_INP_LOCK_CONTENDED(inp))
3436                 being_refed++;
3437         if (SCTP_INP_READ_CONTENDED(inp))
3438                 being_refed++;
3439         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3440                 being_refed++;
3441
3442         if ((inp->refcount) ||
3443             (being_refed) ||
3444             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3445                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3446 #ifdef SCTP_LOG_CLOSING
3447                 sctp_log_closing(inp, NULL, 4);
3448 #endif
3449                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3450                 SCTP_INP_WUNLOCK(inp);
3451                 SCTP_ASOC_CREATE_UNLOCK(inp);
3452                 SCTP_INP_INFO_WUNLOCK();
3453                 return;
3454         }
3455         inp->sctp_ep.signature_change.type = 0;
3456         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3457         /*
3458          * Remove it from the list .. last thing we need a lock for.
3459          */
3460         LIST_REMOVE(inp, sctp_list);
3461         SCTP_INP_WUNLOCK(inp);
3462         SCTP_ASOC_CREATE_UNLOCK(inp);
3463         SCTP_INP_INFO_WUNLOCK();
3464         /*
3465          * Now we release all locks. Since this INP cannot be found anymore
3466          * except possbily by the kill timer that might be running. We call
3467          * the drain function here. It should hit the case were it sees the
3468          * ACTIVE flag cleared and exit out freeing us to proceed and
3469          * destroy everything.
3470          */
3471         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3472                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3473         } else {
3474                 /* Probably un-needed */
3475                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3476         }
3477
3478 #ifdef SCTP_LOG_CLOSING
3479         sctp_log_closing(inp, NULL, 5);
3480 #endif
3481
3482
3483         if ((inp->sctp_asocidhash) != NULL) {
3484                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3485                 inp->sctp_asocidhash = NULL;
3486         }
3487         /* sa_ignore FREED_MEMORY */
3488         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3489                 /* Its only abandoned if it had data left */
3490                 if (sq->length)
3491                         SCTP_STAT_INCR(sctps_left_abandon);
3492
3493                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3494                 sctp_free_remote_addr(sq->whoFrom);
3495                 if (so)
3496                         so->so_rcv.sb_cc -= sq->length;
3497                 if (sq->data) {
3498                         sctp_m_freem(sq->data);
3499                         sq->data = NULL;
3500                 }
3501                 /*
3502                  * no need to free the net count, since at this point all
3503                  * assoc's are gone.
3504                  */
3505                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3506                 SCTP_DECR_READQ_COUNT();
3507         }
3508         /* Now the sctp_pcb things */
3509         /*
3510          * free each asoc if it is not already closed/free. we can't use the
3511          * macro here since le_next will get freed as part of the
3512          * sctp_free_assoc() call.
3513          */
3514         cnt = 0;
3515         if (so) {
3516 #ifdef IPSEC
3517                 ipsec_delete_pcbpolicy(ip_pcb);
3518 #endif                          /* IPSEC */
3519
3520                 /* Unlocks not needed since the socket is gone now */
3521         }
3522         if (ip_pcb->inp_options) {
3523                 (void)sctp_m_free(ip_pcb->inp_options);
3524                 ip_pcb->inp_options = 0;
3525         }
3526         if (ip_pcb->inp_moptions) {
3527                 inp_freemoptions(ip_pcb->inp_moptions);
3528                 ip_pcb->inp_moptions = 0;
3529         }
3530 #ifdef INET6
3531         if (ip_pcb->inp_vflag & INP_IPV6) {
3532                 struct in6pcb *in6p;
3533
3534                 in6p = (struct in6pcb *)inp;
3535                 ip6_freepcbopts(in6p->in6p_outputopts);
3536         }
3537 #endif                          /* INET6 */
3538         ip_pcb->inp_vflag = 0;
3539         /* free up authentication fields */
3540         if (inp->sctp_ep.local_auth_chunks != NULL)
3541                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3542         if (inp->sctp_ep.local_hmacs != NULL)
3543                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3544
3545         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3546         while (shared_key) {
3547                 LIST_REMOVE(shared_key, next);
3548                 sctp_free_sharedkey(shared_key);
3549                 /* sa_ignore FREED_MEMORY */
3550                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3551         }
3552
3553         /*
3554          * if we have an address list the following will free the list of
3555          * ifaddr's that are set into this ep. Again macro limitations here,
3556          * since the LIST_FOREACH could be a bad idea.
3557          */
3558         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3559             laddr = nladdr) {
3560                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3561                 sctp_remove_laddr(laddr);
3562         }
3563
3564 #ifdef SCTP_TRACK_FREED_ASOCS
3565         /* TEMP CODE */
3566         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3567             asoc = nasoc) {
3568                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3569                 LIST_REMOVE(asoc, sctp_tcblist);
3570                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3571                 SCTP_DECR_ASOC_COUNT();
3572         }
3573         /* *** END TEMP CODE *** */
3574 #endif
3575         /* Now lets see about freeing the EP hash table. */
3576         if (inp->sctp_tcbhash != NULL) {
3577                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3578                 inp->sctp_tcbhash = NULL;
3579         }
3580         /* Now we must put the ep memory back into the zone pool */
3581         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3582         SCTP_INP_LOCK_DESTROY(inp);
3583         SCTP_INP_READ_DESTROY(inp);
3584         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3585         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3586         SCTP_DECR_EP_COUNT();
3587 }
3588
3589
3590 struct sctp_nets *
3591 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3592 {
3593         struct sctp_nets *net;
3594
3595         /* locate the address */
3596         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3597                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3598                         return (net);
3599         }
3600         return (NULL);
3601 }
3602
3603
3604 int
3605 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3606 {
3607         struct sctp_ifa *sctp_ifa;
3608
3609         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3610         if (sctp_ifa) {
3611                 return (1);
3612         } else {
3613                 return (0);
3614         }
3615 }
3616
3617 /*
3618  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3619  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3620  * stats of stuff.
3621  */
3622 int
3623 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3624     int set_scope, int from)
3625 {
3626         /*
3627          * The following is redundant to the same lines in the
3628          * sctp_aloc_assoc() but is needed since other's call the add
3629          * address function
3630          */
3631         struct sctp_nets *net, *netfirst;
3632         int addr_inscope;
3633
3634         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3635             from);
3636         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3637
3638         netfirst = sctp_findnet(stcb, newaddr);
3639         if (netfirst) {
3640                 /*
3641                  * Lie and return ok, we don't want to make the association
3642                  * go away for this behavior. It will happen in the TCP
3643                  * model in a connected socket. It does not reach the hash
3644                  * table until after the association is built so it can't be
3645                  * found. Mark as reachable, since the initial creation will
3646                  * have been cleared and the NOT_IN_ASSOC flag will have
3647                  * been added... and we don't want to end up removing it
3648                  * back out.
3649                  */
3650                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3651                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3652                             SCTP_ADDR_UNCONFIRMED);
3653                 } else {
3654                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3655                 }
3656
3657                 return (0);
3658         }
3659         addr_inscope = 1;
3660         if (newaddr->sa_family == AF_INET) {
3661                 struct sockaddr_in *sin;
3662
3663                 sin = (struct sockaddr_in *)newaddr;
3664                 if (sin->sin_addr.s_addr == 0) {
3665                         /* Invalid address */
3666                         return (-1);
3667                 }
3668                 /* zero out the bzero area */
3669                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3670
3671                 /* assure len is set */
3672                 sin->sin_len = sizeof(struct sockaddr_in);
3673                 if (set_scope) {
3674 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3675                         stcb->ipv4_local_scope = 1;
3676 #else
3677                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3678                                 stcb->asoc.ipv4_local_scope = 1;
3679                         }
3680 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3681                 } else {
3682                         /* Validate the address is in scope */
3683                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3684                             (stcb->asoc.ipv4_local_scope == 0)) {
3685                                 addr_inscope = 0;
3686                         }
3687                 }
3688 #ifdef INET6
3689         } else if (newaddr->sa_family == AF_INET6) {
3690                 struct sockaddr_in6 *sin6;
3691
3692                 sin6 = (struct sockaddr_in6 *)newaddr;
3693                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3694                         /* Invalid address */
3695                         return (-1);
3696                 }
3697                 /* assure len is set */
3698                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3699                 if (set_scope) {
3700                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3701                                 stcb->asoc.loopback_scope = 1;
3702                                 stcb->asoc.local_scope = 0;
3703                                 stcb->asoc.ipv4_local_scope = 1;
3704                                 stcb->asoc.site_scope = 1;
3705                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3706                                 /*
3707                                  * If the new destination is a LINK_LOCAL we
3708                                  * must have common site scope. Don't set
3709                                  * the local scope since we may not share
3710                                  * all links, only loopback can do this.
3711                                  * Links on the local network would also be
3712                                  * on our private network for v4 too.
3713                                  */
3714                                 stcb->asoc.ipv4_local_scope = 1;
3715                                 stcb->asoc.site_scope = 1;
3716                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3717                                 /*
3718                                  * If the new destination is SITE_LOCAL then
3719                                  * we must have site scope in common.
3720                                  */
3721                                 stcb->asoc.site_scope = 1;
3722                         }
3723                 } else {
3724                         /* Validate the address is in scope */
3725                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3726                             (stcb->asoc.loopback_scope == 0)) {
3727                                 addr_inscope = 0;
3728                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3729                             (stcb->asoc.local_scope == 0)) {
3730                                 addr_inscope = 0;
3731                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3732                             (stcb->asoc.site_scope == 0)) {
3733                                 addr_inscope = 0;
3734                         }
3735                 }
3736 #endif
3737         } else {
3738                 /* not supported family type */
3739                 return (-1);
3740         }
3741         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3742         if (net == NULL) {
3743                 return (-1);
3744         }
3745         SCTP_INCR_RADDR_COUNT();
3746         bzero(net, sizeof(*net));
3747         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3748         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3749         if (newaddr->sa_family == AF_INET) {
3750                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3751         } else if (newaddr->sa_family == AF_INET6) {
3752                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3753         }
3754         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3755         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3756                 stcb->asoc.loopback_scope = 1;
3757                 stcb->asoc.ipv4_local_scope = 1;
3758                 stcb->asoc.local_scope = 0;
3759                 stcb->asoc.site_scope = 1;
3760                 addr_inscope = 1;
3761         }
3762         net->failure_threshold = stcb->asoc.def_net_failure;
3763         if (addr_inscope == 0) {
3764                 net->dest_state = (SCTP_ADDR_REACHABLE |
3765                     SCTP_ADDR_OUT_OF_SCOPE);
3766         } else {
3767                 if (from == SCTP_ADDR_IS_CONFIRMED)
3768                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3769                         net->dest_state = SCTP_ADDR_REACHABLE;
3770                 else
3771                         net->dest_state = SCTP_ADDR_REACHABLE |
3772                             SCTP_ADDR_UNCONFIRMED;
3773         }
3774         /*
3775          * We set this to 0, the timer code knows that this means its an
3776          * initial value
3777          */
3778         net->RTO = 0;
3779         net->RTO_measured = 0;
3780         stcb->asoc.numnets++;
3781         *(&net->ref_count) = 1;
3782         net->tos_flowlabel = 0;
3783         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3784                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3785         } else {
3786                 net->port = 0;
3787         }
3788 #ifdef INET
3789         if (newaddr->sa_family == AF_INET)
3790                 net->tos_flowlabel = stcb->asoc.default_tos;
3791 #endif
3792 #ifdef INET6
3793         if (newaddr->sa_family == AF_INET6)
3794                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3795 #endif
3796         /* Init the timer structure */
3797         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3798         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3799         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3800
3801         /* Now generate a route for this guy */
3802 #ifdef INET6
3803         /* KAME hack: embed scopeid */
3804         if (newaddr->sa_family == AF_INET6) {
3805                 struct sockaddr_in6 *sin6;
3806
3807                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3808                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3809                 sin6->sin6_scope_id = 0;
3810         }
3811 #endif
3812         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3813
3814         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3815                 /* Get source address */
3816                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3817                     stcb,
3818                     (sctp_route_t *) & net->ro,
3819                     net,
3820                     0,
3821                     stcb->asoc.vrf_id);
3822                 /* Now get the interface MTU */
3823                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3824                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3825                 } else {
3826                         net->mtu = 0;
3827                 }
3828 #ifdef SCTP_PRINT_FOR_B_AND_M
3829                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3830 #endif
3831                 if (net->mtu == 0) {
3832                         /* Huh ?? */
3833                         net->mtu = SCTP_DEFAULT_MTU;
3834                 } else {
3835                         uint32_t rmtu;
3836
3837                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3838 #ifdef SCTP_PRINT_FOR_B_AND_M
3839                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3840 #endif
3841                         if (rmtu == 0) {
3842                                 /*
3843                                  * Start things off to match mtu of
3844                                  * interface please.
3845                                  */
3846                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3847                                     net->ro.ro_rt, net->mtu);
3848                         } else {
3849                                 /*
3850                                  * we take the route mtu over the interface,
3851                                  * since the route may be leading out the
3852                                  * loopback, or a different interface.
3853                                  */
3854                                 net->mtu = rmtu;
3855                         }
3856                 }
3857                 if (from == SCTP_ALLOC_ASOC) {
3858 #ifdef SCTP_PRINT_FOR_B_AND_M
3859                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3860 #endif
3861                         stcb->asoc.smallest_mtu = net->mtu;
3862                 }
3863         } else {
3864                 net->mtu = stcb->asoc.smallest_mtu;
3865         }
3866 #ifdef INET6
3867         if (newaddr->sa_family == AF_INET6) {
3868                 struct sockaddr_in6 *sin6;
3869
3870                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3871                 (void)sa6_recoverscope(sin6);
3872         }
3873 #endif
3874         if (net->port) {
3875                 net->mtu -= sizeof(struct udphdr);
3876         }
3877         if (stcb->asoc.smallest_mtu > net->mtu) {
3878 #ifdef SCTP_PRINT_FOR_B_AND_M
3879                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3880                     net->mtu, stcb->asoc.smallest_mtu);
3881 #endif
3882                 stcb->asoc.smallest_mtu = net->mtu;
3883         }
3884         /* JRS - Use the congestion control given in the CC module */
3885         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3886
3887         /*
3888          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3889          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3890          */
3891         net->find_pseudo_cumack = 1;
3892         net->find_rtx_pseudo_cumack = 1;
3893         net->src_addr_selected = 0;
3894         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3895         if (net->ro.ro_rt == NULL) {
3896                 /* Since we have no route put it at the back */
3897                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3898         } else if (netfirst == NULL) {
3899                 /* We are the first one in the pool. */
3900                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3901         } else if (netfirst->ro.ro_rt == NULL) {
3902                 /*
3903                  * First one has NO route. Place this one ahead of the first
3904                  * one.
3905                  */
3906                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3907         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3908                 /*
3909                  * This one has a different interface than the one at the
3910                  * top of the list. Place it ahead.
3911                  */
3912                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3913         } else {
3914                 /*
3915                  * Ok we have the same interface as the first one. Move
3916                  * forward until we find either a) one with a NULL route...
3917                  * insert ahead of that b) one with a different ifp.. insert
3918                  * after that. c) end of the list.. insert at the tail.
3919                  */
3920                 struct sctp_nets *netlook;
3921
3922                 do {
3923                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3924                         if (netlook == NULL) {
3925                                 /* End of the list */
3926                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3927                                 break;
3928                         } else if (netlook->ro.ro_rt == NULL) {
3929                                 /* next one has NO route */
3930                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3931                                 break;
3932                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3933                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3934                                     net, sctp_next);
3935                                 break;
3936                         }
3937                         /* Shift forward */
3938                         netfirst = netlook;
3939                 } while (netlook != NULL);
3940         }
3941
3942         /* got to have a primary set */
3943         if (stcb->asoc.primary_destination == 0) {
3944                 stcb->asoc.primary_destination = net;
3945         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3946                     (net->ro.ro_rt) &&
3947             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3948                 /* No route to current primary adopt new primary */
3949                 stcb->asoc.primary_destination = net;
3950         }
3951         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3952             net);
3953         /* Validate primary is first */
3954         net = TAILQ_FIRST(&stcb->asoc.nets);
3955         if ((net != stcb->asoc.primary_destination) &&
3956             (stcb->asoc.primary_destination)) {
3957                 /*
3958                  * first one on the list is NOT the primary sctp_cmpaddr()
3959                  * is much more efficent if the primary is the first on the
3960                  * list, make it so.
3961                  */
3962                 TAILQ_REMOVE(&stcb->asoc.nets,
3963                     stcb->asoc.primary_destination, sctp_next);
3964                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3965                     stcb->asoc.primary_destination, sctp_next);
3966         }
3967         return (0);
3968 }
3969
3970
3971 static uint32_t
3972 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3973 {
3974         uint32_t id;
3975         struct sctpasochead *head;
3976         struct sctp_tcb *lstcb;
3977
3978         SCTP_INP_WLOCK(inp);
3979 try_again:
3980         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3981                 /* TSNH */
3982                 SCTP_INP_WUNLOCK(inp);
3983                 return (0);
3984         }
3985         /*
3986          * We don't allow assoc id to be 0, this is needed otherwise if the
3987          * id were to wrap we would have issues with some socket options.
3988          */
3989         if (inp->sctp_associd_counter == 0) {
3990                 inp->sctp_associd_counter++;
3991         }
3992         id = inp->sctp_associd_counter;
3993         inp->sctp_associd_counter++;
3994         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
3995         if (lstcb) {
3996                 goto try_again;
3997         }
3998         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
3999         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4000         stcb->asoc.in_asocid_hash = 1;
4001         SCTP_INP_WUNLOCK(inp);
4002         return id;
4003 }
4004
4005 /*
4006  * allocate an association and add it to the endpoint. The caller must be
4007  * careful to add all additional addresses once they are know right away or
4008  * else the assoc will be may experience a blackout scenario.
4009  */
4010 struct sctp_tcb *
4011 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4012     int *error, uint32_t override_tag, uint32_t vrf_id,
4013     struct thread *p
4014 )
4015 {
4016         /* note the p argument is only valid in unbound sockets */
4017
4018         struct sctp_tcb *stcb;
4019         struct sctp_association *asoc;
4020         struct sctpasochead *head;
4021         uint16_t rport;
4022         int err;
4023
4024         /*
4025          * Assumption made here: Caller has done a
4026          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4027          * address does not exist already.
4028          */
4029         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4030                 /* Hit max assoc, sorry no more */
4031                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4032                 *error = ENOBUFS;
4033                 return (NULL);
4034         }
4035         if (firstaddr == NULL) {
4036                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4037                 *error = EINVAL;
4038                 return (NULL);
4039         }
4040         SCTP_INP_RLOCK(inp);
4041         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4042             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4043             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4044                 /*
4045                  * If its in the TCP pool, its NOT allowed to create an
4046                  * association. The parent listener needs to call
4047                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4048                  * off, or connected one does this.. its an error.
4049                  */
4050                 SCTP_INP_RUNLOCK(inp);
4051                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4052                 *error = EINVAL;
4053                 return (NULL);
4054         }
4055         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4056 #ifdef SCTP_DEBUG
4057         if (firstaddr) {
4058                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4059                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4060                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4061         } else {
4062                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4063         }
4064 #endif                          /* SCTP_DEBUG */
4065         if (firstaddr->sa_family == AF_INET) {
4066                 struct sockaddr_in *sin;
4067
4068                 sin = (struct sockaddr_in *)firstaddr;
4069                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4070                         /* Invalid address */
4071                         SCTP_INP_RUNLOCK(inp);
4072                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4073                         *error = EINVAL;
4074                         return (NULL);
4075                 }
4076                 rport = sin->sin_port;
4077         } else if (firstaddr->sa_family == AF_INET6) {
4078                 struct sockaddr_in6 *sin6;
4079
4080                 sin6 = (struct sockaddr_in6 *)firstaddr;
4081                 if ((sin6->sin6_port == 0) ||
4082                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4083                         /* Invalid address */
4084                         SCTP_INP_RUNLOCK(inp);
4085                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4086                         *error = EINVAL;
4087                         return (NULL);
4088                 }
4089                 rport = sin6->sin6_port;
4090         } else {
4091                 /* not supported family type */
4092                 SCTP_INP_RUNLOCK(inp);
4093                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4094                 *error = EINVAL;
4095                 return (NULL);
4096         }
4097         SCTP_INP_RUNLOCK(inp);
4098         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4099                 /*
4100                  * If you have not performed a bind, then we need to do the
4101                  * ephemerial bind for you.
4102                  */
4103                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4104                     (struct sockaddr *)NULL,
4105                     (struct sctp_ifa *)NULL,
4106                     p
4107                     ))) {
4108                         /* bind error, probably perm */
4109                         *error = err;
4110                         return (NULL);
4111                 }
4112         }
4113         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4114         if (stcb == NULL) {
4115                 /* out of memory? */
4116                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4117                 *error = ENOMEM;
4118                 return (NULL);
4119         }
4120         SCTP_INCR_ASOC_COUNT();
4121
4122         bzero(stcb, sizeof(*stcb));
4123         asoc = &stcb->asoc;
4124
4125         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4126         SCTP_TCB_LOCK_INIT(stcb);
4127         SCTP_TCB_SEND_LOCK_INIT(stcb);
4128         stcb->rport = rport;
4129         /* setup back pointer's */
4130         stcb->sctp_ep = inp;
4131         stcb->sctp_socket = inp->sctp_socket;
4132         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4133                 /* failed */
4134                 SCTP_TCB_LOCK_DESTROY(stcb);
4135                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4136                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4137                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4138                 SCTP_DECR_ASOC_COUNT();
4139                 *error = err;
4140                 return (NULL);
4141         }
4142         /* and the port */
4143         SCTP_INP_INFO_WLOCK();
4144         SCTP_INP_WLOCK(inp);
4145         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4146                 /* inpcb freed while alloc going on */
4147                 SCTP_TCB_LOCK_DESTROY(stcb);
4148                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4149                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4150                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4151                 SCTP_INP_WUNLOCK(inp);
4152                 SCTP_INP_INFO_WUNLOCK();
4153                 SCTP_DECR_ASOC_COUNT();
4154                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4155                 *error = EINVAL;
4156                 return (NULL);
4157         }
4158         SCTP_TCB_LOCK(stcb);
4159
4160         /* now that my_vtag is set, add it to the hash */
4161         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4162         /* put it in the bucket in the vtag hash of assoc's for the system */
4163         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4164         SCTP_INP_INFO_WUNLOCK();
4165
4166         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4167                 /* failure.. memory error? */
4168                 if (asoc->strmout) {
4169                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4170                         asoc->strmout = NULL;
4171                 }
4172                 if (asoc->mapping_array) {
4173                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4174                         asoc->mapping_array = NULL;
4175                 }
4176                 if (asoc->nr_mapping_array) {
4177                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4178                         asoc->nr_mapping_array = NULL;
4179                 }
4180                 SCTP_DECR_ASOC_COUNT();
4181                 SCTP_TCB_LOCK_DESTROY(stcb);
4182                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4183                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4184                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4185                 SCTP_INP_WUNLOCK(inp);
4186                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4187                 *error = ENOBUFS;
4188                 return (NULL);
4189         }
4190         /* Init all the timers */
4191         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4192         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4193         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4194         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4195         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4196         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4197         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4198         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4199
4200         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4201         /* now file the port under the hash as well */
4202         if (inp->sctp_tcbhash != NULL) {
4203                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4204                     inp->sctp_hashmark)];
4205                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4206         }
4207         SCTP_INP_WUNLOCK(inp);
4208         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4209         return (stcb);
4210 }
4211
4212
4213 void
4214 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4215 {
4216         struct sctp_association *asoc;
4217
4218         asoc = &stcb->asoc;
4219         asoc->numnets--;
4220         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4221         if (net == asoc->primary_destination) {
4222                 /* Reset primary */
4223                 struct sctp_nets *lnet;
4224
4225                 lnet = TAILQ_FIRST(&asoc->nets);
4226                 /*
4227                  * Mobility adaptation Ideally, if deleted destination is
4228                  * the primary, it becomes a fast retransmission trigger by
4229                  * the subsequent SET PRIMARY. (by micchie)
4230                  */
4231                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4232                     SCTP_MOBILITY_BASE) ||
4233                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4234                     SCTP_MOBILITY_FASTHANDOFF)) {
4235                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4236                         if (asoc->deleted_primary != NULL) {
4237                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4238                                 goto out;
4239                         }
4240                         asoc->deleted_primary = net;
4241                         atomic_add_int(&net->ref_count, 1);
4242                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4243                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4244                         sctp_mobility_feature_on(stcb->sctp_ep,
4245                             SCTP_MOBILITY_PRIM_DELETED);
4246                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4247                             stcb->sctp_ep, stcb, NULL);
4248                 }
4249 out:
4250                 /* Try to find a confirmed primary */
4251                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4252         }
4253         if (net == asoc->last_data_chunk_from) {
4254                 /* Reset primary */
4255                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4256         }
4257         if (net == asoc->last_control_chunk_from) {
4258                 /* Clear net */
4259                 asoc->last_control_chunk_from = NULL;
4260         }
4261         sctp_free_remote_addr(net);
4262 }
4263
4264 /*
4265  * remove a remote endpoint address from an association, it will fail if the
4266  * address does not exist.
4267  */
4268 int
4269 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4270 {
4271         /*
4272          * Here we need to remove a remote address. This is quite simple, we
4273          * first find it in the list of address for the association
4274          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4275          * on that item. Note we do not allow it to be removed if there are
4276          * no other addresses.
4277          */
4278         struct sctp_association *asoc;
4279         struct sctp_nets *net, *net_tmp;
4280
4281         asoc = &stcb->asoc;
4282
4283         /* locate the address */
4284         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4285                 net_tmp = TAILQ_NEXT(net, sctp_next);
4286                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4287                         continue;
4288                 }
4289                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4290                     remaddr)) {
4291                         /* we found the guy */
4292                         if (asoc->numnets < 2) {
4293                                 /* Must have at LEAST two remote addresses */
4294                                 return (-1);
4295                         } else {
4296                                 sctp_remove_net(stcb, net);
4297                                 return (0);
4298                         }
4299                 }
4300         }
4301         /* not found. */
4302         return (-2);
4303 }
4304
4305 void
4306 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4307 {
4308         struct sctpvtaghead *chain;
4309         struct sctp_tagblock *twait_block;
4310         int found = 0;
4311         int i;
4312
4313         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4314         if (!LIST_EMPTY(chain)) {
4315                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4316                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4317                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4318                                     (twait_block->vtag_block[i].lport == lport) &&
4319                                     (twait_block->vtag_block[i].rport == rport)) {
4320                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4321                                         twait_block->vtag_block[i].v_tag = 0;
4322                                         twait_block->vtag_block[i].lport = 0;
4323                                         twait_block->vtag_block[i].rport = 0;
4324                                         found = 1;
4325                                         break;
4326                                 }
4327                         }
4328                         if (found)
4329                                 break;
4330                 }
4331         }
4332 }
4333
4334 int
4335 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4336 {
4337         struct sctpvtaghead *chain;
4338         struct sctp_tagblock *twait_block;
4339         int found = 0;
4340         int i;
4341
4342         SCTP_INP_INFO_WLOCK();
4343         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4344         if (!LIST_EMPTY(chain)) {
4345                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4346                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4347                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4348                                     (twait_block->vtag_block[i].lport == lport) &&
4349                                     (twait_block->vtag_block[i].rport == rport)) {
4350                                         found = 1;
4351                                         break;
4352                                 }
4353                         }
4354                         if (found)
4355                                 break;
4356                 }
4357         }
4358         SCTP_INP_INFO_WUNLOCK();
4359         return (found);
4360 }
4361
4362
4363 void
4364 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4365 {
4366         struct sctpvtaghead *chain;
4367         struct sctp_tagblock *twait_block;
4368         struct timeval now;
4369         int set, i;
4370
4371         if (time == 0) {
4372                 /* Its disabled */
4373                 return;
4374         }
4375         (void)SCTP_GETTIME_TIMEVAL(&now);
4376         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4377         set = 0;
4378         if (!LIST_EMPTY(chain)) {
4379                 /* Block(s) present, lets find space, and expire on the fly */
4380                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4381                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4382                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4383                                     !set) {
4384                                         twait_block->vtag_block[i].tv_sec_at_expire =
4385                                             now.tv_sec + time;
4386                                         twait_block->vtag_block[i].v_tag = tag;
4387                                         twait_block->vtag_block[i].lport = lport;
4388                                         twait_block->vtag_block[i].rport = rport;
4389                                         set = 1;
4390                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4391                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4392                                         /* Audit expires this guy */
4393                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4394                                         twait_block->vtag_block[i].v_tag = 0;
4395                                         twait_block->vtag_block[i].lport = 0;
4396                                         twait_block->vtag_block[i].rport = 0;
4397                                         if (set == 0) {
4398                                                 /* Reuse it for my new tag */
4399                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4400                                                 twait_block->vtag_block[i].v_tag = tag;
4401                                                 twait_block->vtag_block[i].lport = lport;
4402                                                 twait_block->vtag_block[i].rport = rport;
4403                                                 set = 1;
4404                                         }
4405                                 }
4406                         }
4407                         if (set) {
4408                                 /*
4409                                  * We only do up to the block where we can
4410                                  * place our tag for audits
4411                                  */
4412                                 break;
4413                         }
4414                 }
4415         }
4416         /* Need to add a new block to chain */
4417         if (!set) {
4418                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4419                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4420                 if (twait_block == NULL) {
4421 #ifdef INVARIANTS
4422                         panic("Can not alloc tagblock");
4423 #endif
4424                         return;
4425                 }
4426                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4427                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4428                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4429                 twait_block->vtag_block[0].v_tag = tag;
4430                 twait_block->vtag_block[0].lport = lport;
4431                 twait_block->vtag_block[0].rport = rport;
4432         }
4433 }
4434
4435
4436
4437 /*-
4438  * Free the association after un-hashing the remote port. This
4439  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4440  * expect that the input to this function IS a locked TCB.
4441  * It will return 0, if it did NOT destroy the association (instead
4442  * it unlocks it. It will return NON-zero if it either destroyed the
4443  * association OR the association is already destroyed.
4444  */
4445 int
4446 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4447 {
4448         int i;
4449         struct sctp_association *asoc;
4450         struct sctp_nets *net, *prev;
4451         struct sctp_laddr *laddr;
4452         struct sctp_tmit_chunk *chk;
4453         struct sctp_asconf_addr *aparam;
4454         struct sctp_asconf_ack *aack;
4455         struct sctp_stream_reset_list *liste;
4456         struct sctp_queued_to_read *sq;
4457         struct sctp_stream_queue_pending *sp;
4458         sctp_sharedkey_t *shared_key;
4459         struct socket *so;
4460         int ccnt = 0;
4461         int cnt = 0;
4462
4463         /* first, lets purge the entry from the hash table. */
4464
4465 #ifdef SCTP_LOG_CLOSING
4466         sctp_log_closing(inp, stcb, 6);
4467 #endif
4468         if (stcb->asoc.state == 0) {
4469 #ifdef SCTP_LOG_CLOSING
4470                 sctp_log_closing(inp, NULL, 7);
4471 #endif
4472                 /* there is no asoc, really TSNH :-0 */
4473                 return (1);
4474         }
4475         /* TEMP CODE */
4476         if (stcb->freed_from_where == 0) {
4477                 /* Only record the first place free happened from */
4478                 stcb->freed_from_where = from_location;
4479         }
4480         /* TEMP CODE */
4481
4482         asoc = &stcb->asoc;
4483         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4484             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4485                 /* nothing around */
4486                 so = NULL;
4487         else
4488                 so = inp->sctp_socket;
4489
4490         /*
4491          * We used timer based freeing if a reader or writer is in the way.
4492          * So we first check if we are actually being called from a timer,
4493          * if so we abort early if a reader or writer is still in the way.
4494          */
4495         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4496             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4497                 /*
4498                  * is it the timer driving us? if so are the reader/writers
4499                  * gone?
4500                  */
4501                 if (stcb->asoc.refcnt) {
4502                         /* nope, reader or writer in the way */
4503                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4504                         /* no asoc destroyed */
4505                         SCTP_TCB_UNLOCK(stcb);
4506 #ifdef SCTP_LOG_CLOSING
4507                         sctp_log_closing(inp, stcb, 8);
4508 #endif
4509                         return (0);
4510                 }
4511         }
4512         /* now clean up any other timers */
4513         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4514         asoc->hb_timer.self = NULL;
4515         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4516         asoc->dack_timer.self = NULL;
4517         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4518         /*-
4519          * For stream reset we don't blast this unless
4520          * it is a str-reset timer, it might be the
4521          * free-asoc timer which we DON'T want to
4522          * disturb.
4523          */
4524         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4525                 asoc->strreset_timer.self = NULL;
4526         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4527         asoc->asconf_timer.self = NULL;
4528         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4529         asoc->autoclose_timer.self = NULL;
4530         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4531         asoc->shut_guard_timer.self = NULL;
4532         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4533         asoc->delayed_event_timer.self = NULL;
4534         /* Mobility adaptation */
4535         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4536         asoc->delete_prim_timer.self = NULL;
4537         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4538                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4539                 net->fr_timer.self = NULL;
4540                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4541                 net->rxt_timer.self = NULL;
4542                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4543                 net->pmtu_timer.self = NULL;
4544         }
4545         /* Now the read queue needs to be cleaned up (only once) */
4546         cnt = 0;
4547         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4548                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4549                 SCTP_INP_READ_LOCK(inp);
4550                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4551                         if (sq->stcb == stcb) {
4552                                 sq->do_not_ref_stcb = 1;
4553                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4554                                 /*
4555                                  * If there is no end, there never will be
4556                                  * now.
4557                                  */
4558                                 if (sq->end_added == 0) {
4559                                         /* Held for PD-API clear that. */
4560                                         sq->pdapi_aborted = 1;
4561                                         sq->held_length = 0;
4562                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4563                                                 /*
4564                                                  * Need to add a PD-API
4565                                                  * aborted indication.
4566                                                  * Setting the control_pdapi
4567                                                  * assures that it will be
4568                                                  * added right after this
4569                                                  * msg.
4570                                                  */
4571                                                 uint32_t strseq;
4572
4573                                                 stcb->asoc.control_pdapi = sq;
4574                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4575                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4576                                                     stcb,
4577                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4578                                                     (void *)&strseq,
4579                                                     SCTP_SO_LOCKED);
4580                                                 stcb->asoc.control_pdapi = NULL;
4581                                         }
4582                                 }
4583                                 /* Add an end to wake them */
4584                                 sq->end_added = 1;
4585                                 cnt++;
4586                         }
4587                 }
4588                 SCTP_INP_READ_UNLOCK(inp);
4589                 if (stcb->block_entry) {
4590                         cnt++;
4591                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4592                         stcb->block_entry->error = ECONNRESET;
4593                         stcb->block_entry = NULL;
4594                 }
4595         }
4596         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4597                 /*
4598                  * Someone holds a reference OR the socket is unaccepted
4599                  * yet.
4600                  */
4601                 if ((stcb->asoc.refcnt) ||
4602                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4603                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4604                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4605                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4606                 }
4607                 SCTP_TCB_UNLOCK(stcb);
4608                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4609                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4610                         /* nothing around */
4611                         so = NULL;
4612                 if (so) {
4613                         /* Wake any reader/writers */
4614                         sctp_sorwakeup(inp, so);
4615                         sctp_sowwakeup(inp, so);
4616                 }
4617 #ifdef SCTP_LOG_CLOSING
4618                 sctp_log_closing(inp, stcb, 9);
4619 #endif
4620                 /* no asoc destroyed */
4621                 return (0);
4622         }
4623 #ifdef SCTP_LOG_CLOSING
4624         sctp_log_closing(inp, stcb, 10);
4625 #endif
4626         /*
4627          * When I reach here, no others want to kill the assoc yet.. and I
4628          * own the lock. Now its possible an abort comes in when I do the
4629          * lock exchange below to grab all the locks to do the final take
4630          * out. to prevent this we increment the count, which will start a
4631          * timer and blow out above thus assuring us that we hold exclusive
4632          * killing of the asoc. Note that after getting back the TCB lock we
4633          * will go ahead and increment the counter back up and stop any
4634          * timer a passing stranger may have started :-S
4635          */
4636         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4637                 atomic_add_int(&stcb->asoc.refcnt, 1);
4638
4639                 SCTP_TCB_UNLOCK(stcb);
4640
4641                 SCTP_INP_INFO_WLOCK();
4642                 SCTP_INP_WLOCK(inp);
4643                 SCTP_TCB_LOCK(stcb);
4644         }
4645         /* Double check the GONE flag */
4646         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4647             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4648                 /* nothing around */
4649                 so = NULL;
4650
4651         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4652             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4653                 /*
4654                  * For TCP type we need special handling when we are
4655                  * connected. We also include the peel'ed off ones to.
4656                  */
4657                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4658                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4659                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4660                         if (so) {
4661                                 SOCK_LOCK(so);
4662                                 if (so->so_rcv.sb_cc == 0) {
4663                                         so->so_state &= ~(SS_ISCONNECTING |
4664                                             SS_ISDISCONNECTING |
4665                                             SS_ISCONFIRMING |
4666                                             SS_ISCONNECTED);
4667                                 }
4668                                 socantrcvmore_locked(so);
4669                                 sctp_sowwakeup(inp, so);
4670                                 sctp_sorwakeup(inp, so);
4671                                 SCTP_SOWAKEUP(so);
4672                         }
4673                 }
4674         }
4675         /*
4676          * Make it invalid too, that way if its about to run it will abort
4677          * and return.
4678          */
4679         /* re-increment the lock */
4680         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4681                 atomic_add_int(&stcb->asoc.refcnt, -1);
4682         }
4683         asoc->state = 0;
4684         if (inp->sctp_tcbhash) {
4685                 LIST_REMOVE(stcb, sctp_tcbhash);
4686         }
4687         if (stcb->asoc.in_asocid_hash) {
4688                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4689         }
4690         /* Now lets remove it from the list of ALL associations in the EP */
4691         LIST_REMOVE(stcb, sctp_tcblist);
4692         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4693                 SCTP_INP_INCR_REF(inp);
4694                 SCTP_INP_WUNLOCK(inp);
4695         }
4696         /* pull from vtag hash */
4697         LIST_REMOVE(stcb, sctp_asocs);
4698         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4699             inp->sctp_lport, stcb->rport);
4700
4701         /*
4702          * Now restop the timers to be sure this is paranoia at is finest!
4703          */
4704         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4705         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4706         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4707         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4708         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4709         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4710         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4711         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4712         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4713                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4714                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4715                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4716         }
4717
4718         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4719         prev = NULL;
4720         /*
4721          * The chunk lists and such SHOULD be empty but we check them just
4722          * in case.
4723          */
4724         /* anything on the wheel needs to be removed */
4725         for (i = 0; i < asoc->streamoutcnt; i++) {
4726                 struct sctp_stream_out *outs;
4727
4728                 outs = &asoc->strmout[i];
4729                 /* now clean up any chunks here */
4730                 sp = TAILQ_FIRST(&outs->outqueue);
4731                 while (sp) {
4732                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4733                         if (sp->data) {
4734                                 sctp_m_freem(sp->data);
4735                                 sp->data = NULL;
4736                                 sp->tail_mbuf = NULL;
4737                         }
4738                         sctp_free_remote_addr(sp->net);
4739                         sctp_free_spbufspace(stcb, asoc, sp);
4740                         if (sp->holds_key_ref)
4741                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4742                         /* Free the zone stuff  */
4743                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4744                         SCTP_DECR_STRMOQ_COUNT();
4745                         /* sa_ignore FREED_MEMORY */
4746                         sp = TAILQ_FIRST(&outs->outqueue);
4747                 }
4748         }
4749
4750         /* sa_ignore FREED_MEMORY */
4751         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4752                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4753                 SCTP_FREE(liste, SCTP_M_STRESET);
4754         }
4755
4756         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4757         while (sq) {
4758                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4759                 if (sq->data) {
4760                         sctp_m_freem(sq->data);
4761                         sq->data = NULL;
4762                 }
4763                 sctp_free_remote_addr(sq->whoFrom);
4764                 sq->whoFrom = NULL;
4765                 sq->stcb = NULL;
4766                 /* Free the ctl entry */
4767                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4768                 SCTP_DECR_READQ_COUNT();
4769                 /* sa_ignore FREED_MEMORY */
4770                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4771         }
4772
4773         chk = TAILQ_FIRST(&asoc->free_chunks);
4774         while (chk) {
4775                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4776                 if (chk->data) {
4777                         sctp_m_freem(chk->data);
4778                         chk->data = NULL;
4779                 }
4780                 if (chk->holds_key_ref)
4781                         sctp_auth_key_release(stcb, chk->auth_keyid);
4782                 ccnt++;
4783                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4784                 SCTP_DECR_CHK_COUNT();
4785                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4786                 asoc->free_chunk_cnt--;
4787                 /* sa_ignore FREED_MEMORY */
4788                 chk = TAILQ_FIRST(&asoc->free_chunks);
4789         }
4790         /* pending send queue SHOULD be empty */
4791         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4792                 chk = TAILQ_FIRST(&asoc->send_queue);
4793                 while (chk) {
4794                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4795                         if (chk->data) {
4796                                 sctp_m_freem(chk->data);
4797                                 chk->data = NULL;
4798                         }
4799                         if (chk->holds_key_ref)
4800                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4801                         ccnt++;
4802                         sctp_free_remote_addr(chk->whoTo);
4803                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4804                         SCTP_DECR_CHK_COUNT();
4805                         /* sa_ignore FREED_MEMORY */
4806                         chk = TAILQ_FIRST(&asoc->send_queue);
4807                 }
4808         }
4809 /*
4810   if (ccnt) {
4811   printf("Freed %d from send_queue\n", ccnt);
4812   ccnt = 0;
4813   }
4814 */
4815         /* sent queue SHOULD be empty */
4816         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4817                 chk = TAILQ_FIRST(&asoc->sent_queue);
4818                 while (chk) {
4819                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4820                         if (chk->data) {
4821                                 sctp_m_freem(chk->data);
4822                                 chk->data = NULL;
4823                         }
4824                         if (chk->holds_key_ref)
4825                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4826                         ccnt++;
4827                         sctp_free_remote_addr(chk->whoTo);
4828                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4829                         SCTP_DECR_CHK_COUNT();
4830                         /* sa_ignore FREED_MEMORY */
4831                         chk = TAILQ_FIRST(&asoc->sent_queue);
4832                 }
4833         }
4834 /*
4835   if (ccnt) {
4836   printf("Freed %d from sent_queue\n", ccnt);
4837   ccnt = 0;
4838   }
4839 */
4840         /* control queue MAY not be empty */
4841         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4842                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4843                 while (chk) {
4844                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4845                         if (chk->data) {
4846                                 sctp_m_freem(chk->data);
4847                                 chk->data = NULL;
4848                         }
4849                         if (chk->holds_key_ref)
4850                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4851                         ccnt++;
4852                         sctp_free_remote_addr(chk->whoTo);
4853                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4854                         SCTP_DECR_CHK_COUNT();
4855                         /* sa_ignore FREED_MEMORY */
4856                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4857                 }
4858         }
4859 /*
4860   if (ccnt) {
4861   printf("Freed %d from ctrl_queue\n", ccnt);
4862   ccnt = 0;
4863   }
4864 */
4865
4866         /* ASCONF queue MAY not be empty */
4867         if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4868                 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4869                 while (chk) {
4870                         TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4871                         if (chk->data) {
4872                                 sctp_m_freem(chk->data);
4873                                 chk->data = NULL;
4874                         }
4875                         if (chk->holds_key_ref)
4876                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4877                         ccnt++;
4878                         sctp_free_remote_addr(chk->whoTo);
4879                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4880                         SCTP_DECR_CHK_COUNT();
4881                         /* sa_ignore FREED_MEMORY */
4882                         chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4883                 }
4884         }
4885 /*
4886   if (ccnt) {
4887   printf("Freed %d from asconf_queue\n", ccnt);
4888   ccnt = 0;
4889   }
4890 */
4891         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4892                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4893                 while (chk) {
4894                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4895                         if (chk->data) {
4896                                 sctp_m_freem(chk->data);
4897                                 chk->data = NULL;
4898                         }
4899                         if (chk->holds_key_ref)
4900                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4901                         sctp_free_remote_addr(chk->whoTo);
4902                         ccnt++;
4903                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4904                         SCTP_DECR_CHK_COUNT();
4905                         /* sa_ignore FREED_MEMORY */
4906                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4907                 }
4908         }
4909 /*
4910   if (ccnt) {
4911   printf("Freed %d from reasm_queue\n", ccnt);
4912   ccnt = 0;
4913   }
4914 */
4915         if (asoc->mapping_array) {
4916                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4917                 asoc->mapping_array = NULL;
4918         }
4919         if (asoc->nr_mapping_array) {
4920                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4921                 asoc->nr_mapping_array = NULL;
4922         }
4923         /* the stream outs */
4924         if (asoc->strmout) {
4925                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4926                 asoc->strmout = NULL;
4927         }
4928         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
4929         if (asoc->strmin) {
4930                 struct sctp_queued_to_read *ctl;
4931
4932                 for (i = 0; i < asoc->streamincnt; i++) {
4933                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4934                                 /* We have somethings on the streamin queue */
4935                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4936                                 while (ctl) {
4937                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4938                                             ctl, next);
4939                                         sctp_free_remote_addr(ctl->whoFrom);
4940                                         if (ctl->data) {
4941                                                 sctp_m_freem(ctl->data);
4942                                                 ctl->data = NULL;
4943                                         }
4944                                         /*
4945                                          * We don't free the address here
4946                                          * since all the net's were freed
4947                                          * above.
4948                                          */
4949                                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4950                                         SCTP_DECR_READQ_COUNT();
4951                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4952                                 }
4953                         }
4954                 }
4955                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4956                 asoc->strmin = NULL;
4957         }
4958         asoc->streamincnt = 0;
4959         while (!TAILQ_EMPTY(&asoc->nets)) {
4960                 /* sa_ignore FREED_MEMORY */
4961                 net = TAILQ_FIRST(&asoc->nets);
4962                 /* pull from list */
4963                 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
4964 #ifdef INVARIANTS
4965                         panic("no net's left alloc'ed, or list points to itself");
4966 #endif
4967                         break;
4968                 }
4969                 prev = net;
4970                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4971                 sctp_free_remote_addr(net);
4972         }
4973
4974         while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4975                 /* sa_ignore FREED_MEMORY */
4976                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4977                 sctp_remove_laddr(laddr);
4978         }
4979
4980         /* pending asconf (address) parameters */
4981         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4982                 /* sa_ignore FREED_MEMORY */
4983                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4984                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4985                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4986         }
4987         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4988                 /* sa_ignore FREED_MEMORY */
4989                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4990                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4991                 if (aack->data != NULL) {
4992                         sctp_m_freem(aack->data);
4993                 }
4994                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
4995         }
4996         /* clean up auth stuff */
4997         if (asoc->local_hmacs)
4998                 sctp_free_hmaclist(asoc->local_hmacs);
4999         if (asoc->peer_hmacs)
5000                 sctp_free_hmaclist(asoc->peer_hmacs);
5001
5002         if (asoc->local_auth_chunks)
5003                 sctp_free_chunklist(asoc->local_auth_chunks);
5004         if (asoc->peer_auth_chunks)
5005                 sctp_free_chunklist(asoc->peer_auth_chunks);
5006
5007         sctp_free_authinfo(&asoc->authinfo);
5008
5009         shared_key = LIST_FIRST(&asoc->shared_keys);
5010         while (shared_key) {
5011                 LIST_REMOVE(shared_key, next);
5012                 sctp_free_sharedkey(shared_key);
5013                 /* sa_ignore FREED_MEMORY */
5014                 shared_key = LIST_FIRST(&asoc->shared_keys);
5015         }
5016
5017         /* Insert new items here :> */
5018
5019         /* Get rid of LOCK */
5020         SCTP_TCB_LOCK_DESTROY(stcb);
5021         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5022         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5023                 SCTP_INP_INFO_WUNLOCK();
5024                 SCTP_INP_RLOCK(inp);
5025         }
5026 #ifdef SCTP_TRACK_FREED_ASOCS
5027         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5028                 /* now clean up the tasoc itself */
5029                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5030                 SCTP_DECR_ASOC_COUNT();
5031         } else {
5032                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5033         }
5034 #else
5035         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5036         SCTP_DECR_ASOC_COUNT();
5037 #endif
5038         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5039                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5040                         /*
5041                          * If its NOT the inp_free calling us AND sctp_close
5042                          * as been called, we call back...
5043                          */
5044                         SCTP_INP_RUNLOCK(inp);
5045                         /*
5046                          * This will start the kill timer (if we are the
5047                          * lastone) since we hold an increment yet. But this
5048                          * is the only safe way to do this since otherwise
5049                          * if the socket closes at the same time we are here
5050                          * we might collide in the cleanup.
5051                          */
5052                         sctp_inpcb_free(inp,
5053                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5054                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5055                         SCTP_INP_DECR_REF(inp);
5056                         goto out_of;
5057                 } else {
5058                         /* The socket is still open. */
5059                         SCTP_INP_DECR_REF(inp);
5060                 }
5061         }
5062         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5063                 SCTP_INP_RUNLOCK(inp);
5064         }
5065 out_of:
5066         /* destroyed the asoc */
5067 #ifdef SCTP_LOG_CLOSING
5068         sctp_log_closing(inp, NULL, 11);
5069 #endif
5070         return (1);
5071 }
5072
5073
5074
5075 /*
5076  * determine if a destination is "reachable" based upon the addresses bound
5077  * to the current endpoint (e.g. only v4 or v6 currently bound)
5078  */
5079 /*
5080  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5081  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5082  * types bound as its endpoint
5083  */
5084 int
5085 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5086 {
5087         struct sctp_inpcb *inp;
5088         int answer;
5089
5090         /*
5091          * No locks here, the TCB, in all cases is already locked and an
5092          * assoc is up. There is either a INP lock by the caller applied (in
5093          * asconf case when deleting an address) or NOT in the HB case,
5094          * however if HB then the INP increment is up and the INP will not
5095          * be removed (on top of the fact that we have a TCB lock). So we
5096          * only want to read the sctp_flags, which is either bound-all or
5097          * not.. no protection needed since once an assoc is up you can't be
5098          * changing your binding.
5099          */
5100         inp = stcb->sctp_ep;
5101         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5102                 /* if bound all, destination is not restricted */
5103                 /*
5104                  * RRS: Question during lock work: Is this correct? If you
5105                  * are bound-all you still might need to obey the V4--V6
5106                  * flags??? IMO this bound-all stuff needs to be removed!
5107                  */
5108                 return (1);
5109         }
5110         /* NOTE: all "scope" checks are done when local addresses are added */
5111         if (destaddr->sa_family == AF_INET6) {
5112                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5113         } else if (destaddr->sa_family == AF_INET) {
5114                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5115         } else {
5116                 /* invalid family, so it's unreachable */
5117                 answer = 0;
5118         }
5119         return (answer);
5120 }
5121
5122 /*
5123  * update the inp_vflags on an endpoint
5124  */
5125 static void
5126 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5127 {
5128         struct sctp_laddr *laddr;
5129
5130         /* first clear the flag */
5131         inp->ip_inp.inp.inp_vflag = 0;
5132         /* set the flag based on addresses on the ep list */
5133         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5134                 if (laddr->ifa == NULL) {
5135                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5136                             __FUNCTION__);
5137                         continue;
5138                 }
5139                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5140                         continue;
5141                 }
5142                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5143                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5144                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5145                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5146                 }
5147         }
5148 }
5149
5150 /*
5151  * Add the address to the endpoint local address list There is nothing to be
5152  * done if we are bound to all addresses
5153  */
5154 void
5155 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5156 {
5157         struct sctp_laddr *laddr;
5158         int fnd, error = 0;
5159
5160         fnd = 0;
5161
5162         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5163                 /* You are already bound to all. You have it already */
5164                 return;
5165         }
5166         if (ifa->address.sa.sa_family == AF_INET6) {
5167                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5168                         /* Can't bind a non-useable addr. */
5169                         return;
5170                 }
5171         }
5172         /* first, is it already present? */
5173         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5174                 if (laddr->ifa == ifa) {
5175                         fnd = 1;
5176                         break;
5177                 }
5178         }
5179
5180         if (fnd == 0) {
5181                 /* Not in the ep list */
5182                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5183                 if (error != 0)
5184                         return;
5185                 inp->laddr_count++;
5186                 /* update inp_vflag flags */
5187                 if (ifa->address.sa.sa_family == AF_INET6) {
5188                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5189                 } else if (ifa->address.sa.sa_family == AF_INET) {
5190                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5191                 }
5192         }
5193         return;
5194 }
5195
5196
5197 /*
5198  * select a new (hopefully reachable) destination net (should only be used
5199  * when we deleted an ep addr that is the only usable source address to reach
5200  * the destination net)
5201  */
5202 static void
5203 sctp_select_primary_destination(struct sctp_tcb *stcb)
5204 {
5205         struct sctp_nets *net;
5206
5207         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5208                 /* for now, we'll just pick the first reachable one we find */
5209                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5210                         continue;
5211                 if (sctp_destination_is_reachable(stcb,
5212                     (struct sockaddr *)&net->ro._l_addr)) {
5213                         /* found a reachable destination */
5214                         stcb->asoc.primary_destination = net;
5215                 }
5216         }
5217         /* I can't there from here! ...we're gonna die shortly... */
5218 }
5219
5220
5221 /*
5222  * Delete the address from the endpoint local address list There is nothing
5223  * to be done if we are bound to all addresses
5224  */
5225 void
5226 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5227 {
5228         struct sctp_laddr *laddr;
5229         int fnd;
5230
5231         fnd = 0;
5232         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5233                 /* You are already bound to all. You have it already */
5234                 return;
5235         }
5236         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5237                 if (laddr->ifa == ifa) {
5238                         fnd = 1;
5239                         break;
5240                 }
5241         }
5242         if (fnd && (inp->laddr_count < 2)) {
5243                 /* can't delete unless there are at LEAST 2 addresses */
5244                 return;
5245         }
5246         if (fnd) {
5247                 /*
5248                  * clean up any use of this address go through our
5249                  * associations and clear any last_used_address that match
5250                  * this one for each assoc, see if a new primary_destination
5251                  * is needed
5252                  */
5253                 struct sctp_tcb *stcb;
5254
5255                 /* clean up "next_addr_touse" */
5256                 if (inp->next_addr_touse == laddr)
5257                         /* delete this address */
5258                         inp->next_addr_touse = NULL;
5259
5260                 /* clean up "last_used_address" */
5261                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5262                         struct sctp_nets *net;
5263
5264                         SCTP_TCB_LOCK(stcb);
5265                         if (stcb->asoc.last_used_address == laddr)
5266                                 /* delete this address */
5267                                 stcb->asoc.last_used_address = NULL;
5268                         /*
5269                          * Now spin through all the nets and purge any ref
5270                          * to laddr
5271                          */
5272                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5273                                 if (net->ro._s_addr &&
5274                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5275                                         /* Yep, purge src address selected */
5276                                         sctp_rtentry_t *rt;
5277
5278                                         /* delete this address if cached */
5279                                         rt = net->ro.ro_rt;
5280                                         if (rt != NULL) {
5281                                                 RTFREE(rt);
5282                                                 net->ro.ro_rt = NULL;
5283                                         }
5284                                         sctp_free_ifa(net->ro._s_addr);
5285                                         net->ro._s_addr = NULL;
5286                                         net->src_addr_selected = 0;
5287                                 }
5288                         }
5289                         SCTP_TCB_UNLOCK(stcb);
5290                 }               /* for each tcb */
5291                 /* remove it from the ep list */
5292                 sctp_remove_laddr(laddr);
5293                 inp->laddr_count--;
5294                 /* update inp_vflag flags */
5295                 sctp_update_ep_vflag(inp);
5296         }
5297         return;
5298 }
5299
5300 /*
5301  * Add the address to the TCB local address restricted list.
5302  * This is a "pending" address list (eg. addresses waiting for an
5303  * ASCONF-ACK response) and cannot be used as a valid source address.
5304  */
5305 void
5306 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5307 {
5308         struct sctp_inpcb *inp;
5309         struct sctp_laddr *laddr;
5310         struct sctpladdr *list;
5311
5312         /*
5313          * Assumes TCB is locked.. and possibly the INP. May need to
5314          * confirm/fix that if we need it and is not the case.
5315          */
5316         list = &stcb->asoc.sctp_restricted_addrs;
5317
5318         inp = stcb->sctp_ep;
5319         if (ifa->address.sa.sa_family == AF_INET6) {
5320                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5321                         /* Can't bind a non-existent addr. */
5322                         return;
5323                 }
5324         }
5325         /* does the address already exist? */
5326         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5327                 if (laddr->ifa == ifa) {
5328                         return;
5329                 }
5330         }
5331
5332         /* add to the list */
5333         (void)sctp_insert_laddr(list, ifa, 0);
5334         return;
5335 }
5336
5337 /*
5338  * insert an laddr entry with the given ifa for the desired list
5339  */
5340 int
5341 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5342 {
5343         struct sctp_laddr *laddr;
5344
5345         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5346         if (laddr == NULL) {
5347                 /* out of memory? */
5348                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5349                 return (EINVAL);
5350         }
5351         SCTP_INCR_LADDR_COUNT();
5352         bzero(laddr, sizeof(*laddr));
5353         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5354         laddr->ifa = ifa;
5355         laddr->action = act;
5356         atomic_add_int(&ifa->refcount, 1);
5357         /* insert it */
5358         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5359
5360         return (0);
5361 }
5362
5363 /*
5364  * Remove an laddr entry from the local address list (on an assoc)
5365  */
5366 void
5367 sctp_remove_laddr(struct sctp_laddr *laddr)
5368 {
5369
5370         /* remove from the list */
5371         LIST_REMOVE(laddr, sctp_nxt_addr);
5372         sctp_free_ifa(laddr->ifa);
5373         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5374         SCTP_DECR_LADDR_COUNT();
5375 }
5376
5377 /*
5378  * Remove a local address from the TCB local address restricted list
5379  */
5380 void
5381 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5382 {
5383         struct sctp_inpcb *inp;
5384         struct sctp_laddr *laddr;
5385
5386         /*
5387          * This is called by asconf work. It is assumed that a) The TCB is
5388          * locked and b) The INP is locked. This is true in as much as I can
5389          * trace through the entry asconf code where I did these locks.
5390          * Again, the ASCONF code is a bit different in that it does lock
5391          * the INP during its work often times. This must be since we don't
5392          * want other proc's looking up things while what they are looking
5393          * up is changing :-D
5394          */
5395
5396         inp = stcb->sctp_ep;
5397         /* if subset bound and don't allow ASCONF's, can't delete last */
5398         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5399             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5400                 if (stcb->sctp_ep->laddr_count < 2) {
5401                         /* can't delete last address */
5402                         return;
5403                 }
5404         }
5405         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5406                 /* remove the address if it exists */
5407                 if (laddr->ifa == NULL)
5408                         continue;
5409                 if (laddr->ifa == ifa) {
5410                         sctp_remove_laddr(laddr);
5411                         return;
5412                 }
5413         }
5414
5415         /* address not found! */
5416         return;
5417 }
5418
5419 /*
5420  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5421  */
5422 /* sysctl */
5423 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5424 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5425
5426 void
5427 sctp_pcb_init()
5428 {
5429         /*
5430          * SCTP initialization for the PCB structures should be called by
5431          * the sctp_init() funciton.
5432          */
5433         int i;
5434         struct timeval tv;
5435
5436         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5437                 /* error I was called twice */
5438                 return;
5439         }
5440         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5441
5442 #if defined(SCTP_LOCAL_TRACE_BUF)
5443         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5444 #endif
5445         (void)SCTP_GETTIME_TIMEVAL(&tv);
5446 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5447         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5448         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5449 #else
5450         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5451         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5452 #endif
5453         /* init the empty list of (All) Endpoints */
5454         LIST_INIT(&SCTP_BASE_INFO(listhead));
5455
5456
5457         /* init the hash table of endpoints */
5458         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5459         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5460         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5461         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5462             &SCTP_BASE_INFO(hashasocmark));
5463         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5464             &SCTP_BASE_INFO(hashmark));
5465         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5466             &SCTP_BASE_INFO(hashtcpmark));
5467         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5468
5469
5470         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5471             &SCTP_BASE_INFO(hashvrfmark));
5472
5473         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5474             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5475         /* init the zones */
5476         /*
5477          * FIX ME: Should check for NULL returns, but if it does fail we are
5478          * doomed to panic anyways... add later maybe.
5479          */
5480         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5481             sizeof(struct sctp_inpcb), maxsockets);
5482
5483         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5484             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5485
5486         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5487             sizeof(struct sctp_laddr),
5488             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5489
5490         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5491             sizeof(struct sctp_nets),
5492             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5493
5494         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5495             sizeof(struct sctp_tmit_chunk),
5496             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5497
5498         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5499             sizeof(struct sctp_queued_to_read),
5500             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5501
5502         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5503             sizeof(struct sctp_stream_queue_pending),
5504             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5505
5506         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5507             sizeof(struct sctp_asconf),
5508             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5509
5510         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5511             sizeof(struct sctp_asconf_ack),
5512             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5513
5514
5515         /* Master Lock INIT for info structure */
5516         SCTP_INP_INFO_LOCK_INIT();
5517         SCTP_STATLOG_INIT_LOCK();
5518
5519         SCTP_IPI_COUNT_INIT();
5520         SCTP_IPI_ADDR_INIT();
5521 #ifdef SCTP_PACKET_LOGGING
5522         SCTP_IP_PKTLOG_INIT();
5523 #endif
5524         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5525
5526         SCTP_WQ_ADDR_INIT();
5527         /* not sure if we need all the counts */
5528         SCTP_BASE_INFO(ipi_count_ep) = 0;
5529         /* assoc/tcb zone info */
5530         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5531         /* local addrlist zone info */
5532         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5533         /* remote addrlist zone info */
5534         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5535         /* chunk info */
5536         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5537
5538         /* socket queue zone info */
5539         SCTP_BASE_INFO(ipi_count_readq) = 0;
5540
5541         /* stream out queue cont */
5542         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5543
5544         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5545         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5546
5547         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5548
5549         /* Init the TIMEWAIT list */
5550         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5551                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5552         }
5553
5554         sctp_startup_iterator();
5555
5556         /*
5557          * INIT the default VRF which for BSD is the only one, other O/S's
5558          * may have more. But initially they must start with one and then
5559          * add the VRF's as addresses are added.
5560          */
5561         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5562
5563 }
5564
5565 /*
5566  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5567  */
5568 void
5569 sctp_pcb_finish(void)
5570 {
5571         struct sctp_vrflist *vrf_bucket;
5572         struct sctp_vrf *vrf;
5573         struct sctp_ifn *ifn;
5574         struct sctp_ifa *ifa;
5575         struct sctpvtaghead *chain;
5576         struct sctp_tagblock *twait_block, *prev_twait_block;
5577         struct sctp_laddr *wi;
5578         int i;
5579
5580         /*
5581          * Free BSD the it thread never exits but we do clean up. The only
5582          * way freebsd reaches here if we have VRF's but we still add the
5583          * ifdef to make it compile on old versions.
5584          */
5585         {
5586                 struct sctp_iterator *it, *nit;
5587
5588                 SCTP_IPI_ITERATOR_WQ_LOCK();
5589                 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
5590                 while (it) {
5591                         nit = TAILQ_NEXT(it, sctp_nxt_itr);
5592                         if (it->vn != curvnet) {
5593                                 it = nit;
5594                                 continue;
5595                         }
5596                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
5597                             it, sctp_nxt_itr);
5598                         if (it->function_atend != NULL) {
5599                                 (*it->function_atend) (it->pointer, it->val);
5600                         }
5601                         SCTP_FREE(it, SCTP_M_ITER);
5602                         it = nit;
5603                 }
5604                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5605                 SCTP_ITERATOR_LOCK();
5606                 if ((sctp_it_ctl.cur_it) &&
5607                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5608                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5609                 }
5610                 SCTP_ITERATOR_UNLOCK();
5611         }
5612
5613         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5614         SCTP_WQ_ADDR_LOCK();
5615         while ((wi = LIST_FIRST(&SCTP_BASE_INFO(addr_wq))) != NULL) {
5616                 LIST_REMOVE(wi, sctp_nxt_addr);
5617                 SCTP_DECR_LADDR_COUNT();
5618                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5619         }
5620         SCTP_WQ_ADDR_UNLOCK();
5621
5622         /*
5623          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5624          * destroyed first).
5625          */
5626         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5627         while ((vrf = LIST_FIRST(vrf_bucket)) != NULL) {
5628                 while ((ifn = LIST_FIRST(&vrf->ifnlist)) != NULL) {
5629                         while ((ifa = LIST_FIRST(&ifn->ifalist)) != NULL) {
5630                                 /* free the ifa */
5631                                 LIST_REMOVE(ifa, next_bucket);
5632                                 LIST_REMOVE(ifa, next_ifa);
5633                                 SCTP_FREE(ifa, SCTP_M_IFA);
5634                         }
5635                         /* free the ifn */
5636                         LIST_REMOVE(ifn, next_bucket);
5637                         LIST_REMOVE(ifn, next_ifn);
5638                         SCTP_FREE(ifn, SCTP_M_IFN);
5639                 }
5640                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5641                 /* free the vrf */
5642                 LIST_REMOVE(vrf, next_vrf);
5643                 SCTP_FREE(vrf, SCTP_M_VRF);
5644         }
5645         /* free the vrf hashes */
5646         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5647         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5648
5649         /*
5650          * free the TIMEWAIT list elements malloc'd in the function
5651          * sctp_add_vtag_to_timewait()...
5652          */
5653         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5654                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5655                 if (!LIST_EMPTY(chain)) {
5656                         prev_twait_block = NULL;
5657                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5658                                 if (prev_twait_block) {
5659                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5660                                 }
5661                                 prev_twait_block = twait_block;
5662                         }
5663                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5664                 }
5665         }
5666
5667         /* free the locks and mutexes */
5668 #ifdef SCTP_PACKET_LOGGING
5669         SCTP_IP_PKTLOG_DESTROY();
5670 #endif
5671         SCTP_IPI_ADDR_DESTROY();
5672         SCTP_STATLOG_DESTROY();
5673         SCTP_INP_INFO_LOCK_DESTROY();
5674
5675         SCTP_WQ_ADDR_DESTROY();
5676
5677         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5678         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5679         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5680         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5681         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5682         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5683         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5684         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5685         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5686         /* Get rid of other stuff to */
5687         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5688                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5689         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5690                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5691         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5692                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5693
5694 }
5695
5696
5697 int
5698 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5699     int iphlen, int offset, int limit, struct sctphdr *sh,
5700     struct sockaddr *altsa)
5701 {
5702         /*
5703          * grub through the INIT pulling addresses and loading them to the
5704          * nets structure in the asoc. The from address in the mbuf should
5705          * also be loaded (if it is not already). This routine can be called
5706          * with either INIT or INIT-ACK's as long as the m points to the IP
5707          * packet and the offset points to the beginning of the parameters.
5708          */
5709         struct sctp_inpcb *inp, *l_inp;
5710         struct sctp_nets *net, *net_tmp;
5711         struct ip *iph;
5712         struct sctp_paramhdr *phdr, parm_buf;
5713         struct sctp_tcb *stcb_tmp;
5714         uint16_t ptype, plen;
5715         struct sockaddr *sa;
5716         struct sockaddr_storage dest_store;
5717         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5718         struct sockaddr_in sin;
5719         struct sockaddr_in6 sin6;
5720         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5721         struct sctp_auth_random *p_random = NULL;
5722         uint16_t random_len = 0;
5723         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5724         struct sctp_auth_hmac_algo *hmacs = NULL;
5725         uint16_t hmacs_len = 0;
5726         uint8_t saw_asconf = 0;
5727         uint8_t saw_asconf_ack = 0;
5728         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5729         struct sctp_auth_chunk_list *chunks = NULL;
5730         uint16_t num_chunks = 0;
5731         sctp_key_t *new_key;
5732         uint32_t keylen;
5733         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5734
5735         /* First get the destination address setup too. */
5736         memset(&sin, 0, sizeof(sin));
5737         memset(&sin6, 0, sizeof(sin6));
5738
5739         sin.sin_family = AF_INET;
5740         sin.sin_len = sizeof(sin);
5741         sin.sin_port = stcb->rport;
5742
5743         sin6.sin6_family = AF_INET6;
5744         sin6.sin6_len = sizeof(struct sockaddr_in6);
5745         sin6.sin6_port = stcb->rport;
5746         if (altsa == NULL) {
5747                 iph = mtod(m, struct ip *);
5748                 switch (iph->ip_v) {
5749                 case IPVERSION:
5750                         {
5751                                 /* its IPv4 */
5752                                 struct sockaddr_in *sin_2;
5753
5754                                 sin_2 = (struct sockaddr_in *)(local_sa);
5755                                 memset(sin_2, 0, sizeof(sin));
5756                                 sin_2->sin_family = AF_INET;
5757                                 sin_2->sin_len = sizeof(sin);
5758                                 sin_2->sin_port = sh->dest_port;
5759                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5760                                 sin.sin_addr = iph->ip_src;
5761                                 sa = (struct sockaddr *)&sin;
5762                                 break;
5763                         }
5764 #ifdef INET6
5765                 case IPV6_VERSION >> 4:
5766                         {
5767                                 /* its IPv6 */
5768                                 struct ip6_hdr *ip6;
5769                                 struct sockaddr_in6 *sin6_2;
5770
5771                                 ip6 = mtod(m, struct ip6_hdr *);
5772                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5773                                 memset(sin6_2, 0, sizeof(sin6));
5774                                 sin6_2->sin6_family = AF_INET6;
5775                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5776                                 sin6_2->sin6_port = sh->dest_port;
5777                                 sin6.sin6_addr = ip6->ip6_src;
5778                                 sa = (struct sockaddr *)&sin6;
5779                                 break;
5780                         }
5781 #endif
5782                 default:
5783                         sa = NULL;
5784                         break;
5785                 }
5786         } else {
5787                 /*
5788                  * For cookies we use the src address NOT from the packet
5789                  * but from the original INIT
5790                  */
5791                 sa = altsa;
5792         }
5793         /* Turn off ECN until we get through all params */
5794         stcb->asoc.ecn_allowed = 0;
5795         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5796                 /* mark all addresses that we have currently on the list */
5797                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5798         }
5799         /* does the source address already exist? if so skip it */
5800         l_inp = inp = stcb->sctp_ep;
5801
5802         atomic_add_int(&stcb->asoc.refcnt, 1);
5803         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5804         atomic_add_int(&stcb->asoc.refcnt, -1);
5805
5806         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5807                 /* we must add the source address */
5808                 /* no scope set here since we have a tcb already. */
5809                 if ((sa->sa_family == AF_INET) &&
5810                     (stcb->asoc.ipv4_addr_legal)) {
5811                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5812                                 return (-1);
5813                         }
5814                 } else if ((sa->sa_family == AF_INET6) &&
5815                     (stcb->asoc.ipv6_addr_legal)) {
5816                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5817                                 return (-2);
5818                         }
5819                 }
5820         } else {
5821                 if (net_tmp != NULL && stcb_tmp == stcb) {
5822                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5823                 } else if (stcb_tmp != stcb) {
5824                         /* It belongs to another association? */
5825                         if (stcb_tmp)
5826                                 SCTP_TCB_UNLOCK(stcb_tmp);
5827                         return (-3);
5828                 }
5829         }
5830         if (stcb->asoc.state == 0) {
5831                 /* the assoc was freed? */
5832                 return (-4);
5833         }
5834         /*
5835          * peer must explicitly turn this on. This may have been initialized
5836          * to be "on" in order to allow local addr changes while INIT's are
5837          * in flight.
5838          */
5839         stcb->asoc.peer_supports_asconf = 0;
5840         /* now we must go through each of the params. */
5841         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5842         while (phdr) {
5843                 ptype = ntohs(phdr->param_type);
5844                 plen = ntohs(phdr->param_length);
5845                 /*
5846                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5847                  * (int)plen);
5848                  */
5849                 if (offset + plen > limit) {
5850                         break;
5851                 }
5852                 if (plen == 0) {
5853                         break;
5854                 }
5855                 if (ptype == SCTP_IPV4_ADDRESS) {
5856                         if (stcb->asoc.ipv4_addr_legal) {
5857                                 struct sctp_ipv4addr_param *p4, p4_buf;
5858
5859                                 /* ok get the v4 address and check/add */
5860                                 phdr = sctp_get_next_param(m, offset,
5861                                     (struct sctp_paramhdr *)&p4_buf,
5862                                     sizeof(p4_buf));
5863                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5864                                     phdr == NULL) {
5865                                         return (-5);
5866                                 }
5867                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5868                                 sin.sin_addr.s_addr = p4->addr;
5869                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5870                                         /* Skip multi-cast addresses */
5871                                         goto next_param;
5872                                 }
5873                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5874                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5875                                         goto next_param;
5876                                 }
5877                                 sa = (struct sockaddr *)&sin;
5878                                 inp = stcb->sctp_ep;
5879                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5880                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5881                                     local_sa, stcb);
5882                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5883
5884                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5885                                     inp == NULL) {
5886                                         /* we must add the source address */
5887                                         /*
5888                                          * no scope set since we have a tcb
5889                                          * already
5890                                          */
5891
5892                                         /*
5893                                          * we must validate the state again
5894                                          * here
5895                                          */
5896                         add_it_now:
5897                                         if (stcb->asoc.state == 0) {
5898                                                 /* the assoc was freed? */
5899                                                 return (-7);
5900                                         }
5901                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5902                                                 return (-8);
5903                                         }
5904                                 } else if (stcb_tmp == stcb) {
5905                                         if (stcb->asoc.state == 0) {
5906                                                 /* the assoc was freed? */
5907                                                 return (-10);
5908                                         }
5909                                         if (net != NULL) {
5910                                                 /* clear flag */
5911                                                 net->dest_state &=
5912                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5913                                         }
5914                                 } else {
5915                                         /*
5916                                          * strange, address is in another
5917                                          * assoc? straighten out locks.
5918                                          */
5919                                         if (stcb_tmp) {
5920                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5921                                                         /*
5922                                                          * in setup state we
5923                                                          * abort this guy
5924                                                          */
5925                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
5926                                                             stcb_tmp, 1, NULL, 0);
5927                                                         goto add_it_now;
5928                                                 }
5929                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5930                                         }
5931                                         if (stcb->asoc.state == 0) {
5932                                                 /* the assoc was freed? */
5933                                                 return (-12);
5934                                         }
5935                                         return (-13);
5936                                 }
5937                         }
5938                 } else if (ptype == SCTP_IPV6_ADDRESS) {
5939                         if (stcb->asoc.ipv6_addr_legal) {
5940                                 /* ok get the v6 address and check/add */
5941                                 struct sctp_ipv6addr_param *p6, p6_buf;
5942
5943                                 phdr = sctp_get_next_param(m, offset,
5944                                     (struct sctp_paramhdr *)&p6_buf,
5945                                     sizeof(p6_buf));
5946                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5947                                     phdr == NULL) {
5948                                         return (-14);
5949                                 }
5950                                 p6 = (struct sctp_ipv6addr_param *)phdr;
5951                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5952                                     sizeof(p6->addr));
5953                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5954                                         /* Skip multi-cast addresses */
5955                                         goto next_param;
5956                                 }
5957                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5958                                         /*
5959                                          * Link local make no sense without
5960                                          * scope
5961                                          */
5962                                         goto next_param;
5963                                 }
5964                                 sa = (struct sockaddr *)&sin6;
5965                                 inp = stcb->sctp_ep;
5966                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5967                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5968                                     local_sa, stcb);
5969                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5970                                 if (stcb_tmp == NULL &&
5971                                     (inp == stcb->sctp_ep || inp == NULL)) {
5972                                         /*
5973                                          * we must validate the state again
5974                                          * here
5975                                          */
5976                         add_it_now6:
5977                                         if (stcb->asoc.state == 0) {
5978                                                 /* the assoc was freed? */
5979                                                 return (-16);
5980                                         }
5981                                         /*
5982                                          * we must add the address, no scope
5983                                          * set
5984                                          */
5985                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5986                                                 return (-17);
5987                                         }
5988                                 } else if (stcb_tmp == stcb) {
5989                                         /*
5990                                          * we must validate the state again
5991                                          * here
5992                                          */
5993                                         if (stcb->asoc.state == 0) {
5994                                                 /* the assoc was freed? */
5995                                                 return (-19);
5996                                         }
5997                                         if (net != NULL) {
5998                                                 /* clear flag */
5999                                                 net->dest_state &=
6000                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6001                                         }
6002                                 } else {
6003                                         /*
6004                                          * strange, address is in another
6005                                          * assoc? straighten out locks.
6006                                          */
6007                                         if (stcb_tmp)
6008                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6009                                                         /*
6010                                                          * in setup state we
6011                                                          * abort this guy
6012                                                          */
6013                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6014                                                             stcb_tmp, 1, NULL, 0);
6015                                                         goto add_it_now6;
6016                                                 }
6017                                         SCTP_TCB_UNLOCK(stcb_tmp);
6018
6019                                         if (stcb->asoc.state == 0) {
6020                                                 /* the assoc was freed? */
6021                                                 return (-21);
6022                                         }
6023                                         return (-22);
6024                                 }
6025                         }
6026                 } else if (ptype == SCTP_ECN_CAPABLE) {
6027                         stcb->asoc.ecn_allowed = 1;
6028                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6029                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6030                                 struct sctp_adaptation_layer_indication ai,
6031                                                                 *aip;
6032
6033                                 phdr = sctp_get_next_param(m, offset,
6034                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6035                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6036                                 if (aip) {
6037                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6038                                         stcb->asoc.adaptation_needed = 1;
6039                                 }
6040                         }
6041                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6042                         struct sctp_asconf_addr_param lstore, *fee;
6043                         struct sctp_asconf_addrv4_param *fii;
6044                         int lptype;
6045                         struct sockaddr *lsa = NULL;
6046
6047                         stcb->asoc.peer_supports_asconf = 1;
6048                         if (plen > sizeof(lstore)) {
6049                                 return (-23);
6050                         }
6051                         phdr = sctp_get_next_param(m, offset,
6052                             (struct sctp_paramhdr *)&lstore,
6053                             min(plen, sizeof(lstore)));
6054                         if (phdr == NULL) {
6055                                 return (-24);
6056                         }
6057                         fee = (struct sctp_asconf_addr_param *)phdr;
6058                         lptype = ntohs(fee->addrp.ph.param_type);
6059                         if (lptype == SCTP_IPV4_ADDRESS) {
6060                                 if (plen !=
6061                                     sizeof(struct sctp_asconf_addrv4_param)) {
6062                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6063                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6064                                             plen);
6065                                 } else {
6066                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6067                                         sin.sin_addr.s_addr = fii->addrp.addr;
6068                                         lsa = (struct sockaddr *)&sin;
6069                                 }
6070                         } else if (lptype == SCTP_IPV6_ADDRESS) {
6071                                 if (plen !=
6072                                     sizeof(struct sctp_asconf_addr_param)) {
6073                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6074                                             (int)sizeof(struct sctp_asconf_addr_param),
6075                                             plen);
6076                                 } else {
6077                                         memcpy(sin6.sin6_addr.s6_addr,
6078                                             fee->addrp.addr,
6079                                             sizeof(fee->addrp.addr));
6080                                         lsa = (struct sockaddr *)&sin6;
6081                                 }
6082                         }
6083                         if (lsa) {
6084                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6085                         }
6086                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6087                         stcb->asoc.peer_supports_nat = 1;
6088                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6089                         /* Peer supports pr-sctp */
6090                         stcb->asoc.peer_supports_prsctp = 1;
6091                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6092                         /* A supported extension chunk */
6093                         struct sctp_supported_chunk_types_param *pr_supported;
6094                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6095                         int num_ent, i;
6096
6097                         phdr = sctp_get_next_param(m, offset,
6098                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6099                         if (phdr == NULL) {
6100                                 return (-25);
6101                         }
6102                         stcb->asoc.peer_supports_asconf = 0;
6103                         stcb->asoc.peer_supports_prsctp = 0;
6104                         stcb->asoc.peer_supports_pktdrop = 0;
6105                         stcb->asoc.peer_supports_strreset = 0;
6106                         stcb->asoc.peer_supports_nr_sack = 0;
6107                         stcb->asoc.peer_supports_auth = 0;
6108                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6109                         num_ent = plen - sizeof(struct sctp_paramhdr);
6110                         for (i = 0; i < num_ent; i++) {
6111                                 switch (pr_supported->chunk_types[i]) {
6112                                 case SCTP_ASCONF:
6113                                 case SCTP_ASCONF_ACK:
6114                                         stcb->asoc.peer_supports_asconf = 1;
6115                                         break;
6116                                 case SCTP_FORWARD_CUM_TSN:
6117                                         stcb->asoc.peer_supports_prsctp = 1;
6118                                         break;
6119                                 case SCTP_PACKET_DROPPED:
6120                                         stcb->asoc.peer_supports_pktdrop = 1;
6121                                         break;
6122                                 case SCTP_NR_SELECTIVE_ACK:
6123                                         if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
6124                                                 stcb->asoc.peer_supports_nr_sack = 1;
6125                                         else
6126                                                 stcb->asoc.peer_supports_nr_sack = 0;
6127                                         break;
6128                                 case SCTP_STREAM_RESET:
6129                                         stcb->asoc.peer_supports_strreset = 1;
6130                                         break;
6131                                 case SCTP_AUTHENTICATION:
6132                                         stcb->asoc.peer_supports_auth = 1;
6133                                         break;
6134                                 default:
6135                                         /* one I have not learned yet */
6136                                         break;
6137
6138                                 }
6139                         }
6140                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6141                         /* Peer supports ECN-nonce */
6142                         stcb->asoc.peer_supports_ecn_nonce = 1;
6143                         stcb->asoc.ecn_nonce_allowed = 1;
6144                 } else if (ptype == SCTP_RANDOM) {
6145                         if (plen > sizeof(random_store))
6146                                 break;
6147                         if (got_random) {
6148                                 /* already processed a RANDOM */
6149                                 goto next_param;
6150                         }
6151                         phdr = sctp_get_next_param(m, offset,
6152                             (struct sctp_paramhdr *)random_store,
6153                             min(sizeof(random_store), plen));
6154                         if (phdr == NULL)
6155                                 return (-26);
6156                         p_random = (struct sctp_auth_random *)phdr;
6157                         random_len = plen - sizeof(*p_random);
6158                         /* enforce the random length */
6159                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6160                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6161                                 return (-27);
6162                         }
6163                         got_random = 1;
6164                 } else if (ptype == SCTP_HMAC_LIST) {
6165                         int num_hmacs;
6166                         int i;
6167
6168                         if (plen > sizeof(hmacs_store))
6169                                 break;
6170                         if (got_hmacs) {
6171                                 /* already processed a HMAC list */
6172                                 goto next_param;
6173                         }
6174                         phdr = sctp_get_next_param(m, offset,
6175                             (struct sctp_paramhdr *)hmacs_store,
6176                             min(plen, sizeof(hmacs_store)));
6177                         if (phdr == NULL)
6178                                 return (-28);
6179                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6180                         hmacs_len = plen - sizeof(*hmacs);
6181                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6182                         /* validate the hmac list */
6183                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6184                                 return (-29);
6185                         }
6186                         if (stcb->asoc.peer_hmacs != NULL)
6187                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6188                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6189                         if (stcb->asoc.peer_hmacs != NULL) {
6190                                 for (i = 0; i < num_hmacs; i++) {
6191                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6192                                             ntohs(hmacs->hmac_ids[i]));
6193                                 }
6194                         }
6195                         got_hmacs = 1;
6196                 } else if (ptype == SCTP_CHUNK_LIST) {
6197                         int i;
6198
6199                         if (plen > sizeof(chunks_store))
6200                                 break;
6201                         if (got_chklist) {
6202                                 /* already processed a Chunks list */
6203                                 goto next_param;
6204                         }
6205                         phdr = sctp_get_next_param(m, offset,
6206                             (struct sctp_paramhdr *)chunks_store,
6207                             min(plen, sizeof(chunks_store)));
6208                         if (phdr == NULL)
6209                                 return (-30);
6210                         chunks = (struct sctp_auth_chunk_list *)phdr;
6211                         num_chunks = plen - sizeof(*chunks);
6212                         if (stcb->asoc.peer_auth_chunks != NULL)
6213                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6214                         else
6215                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6216                         for (i = 0; i < num_chunks; i++) {
6217                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6218                                     stcb->asoc.peer_auth_chunks);
6219                                 /* record asconf/asconf-ack if listed */
6220                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6221                                         saw_asconf = 1;
6222                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6223                                         saw_asconf_ack = 1;
6224
6225                         }
6226                         got_chklist = 1;
6227                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6228                             (ptype == SCTP_STATE_COOKIE) ||
6229                             (ptype == SCTP_UNRECOG_PARAM) ||
6230                             (ptype == SCTP_COOKIE_PRESERVE) ||
6231                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6232                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6233                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6234                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6235                     (ptype == SCTP_SUCCESS_REPORT)) {
6236                          /* don't care */ ;
6237                 } else {
6238                         if ((ptype & 0x8000) == 0x0000) {
6239                                 /*
6240                                  * must stop processing the rest of the
6241                                  * param's. Any report bits were handled
6242                                  * with the call to
6243                                  * sctp_arethere_unrecognized_parameters()
6244                                  * when the INIT or INIT-ACK was first seen.
6245                                  */
6246                                 break;
6247                         }
6248                 }
6249
6250 next_param:
6251                 offset += SCTP_SIZE32(plen);
6252                 if (offset >= limit) {
6253                         break;
6254                 }
6255                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6256                     sizeof(parm_buf));
6257         }
6258         /* Now check to see if we need to purge any addresses */
6259         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6260                 net_tmp = TAILQ_NEXT(net, sctp_next);
6261                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6262                     SCTP_ADDR_NOT_IN_ASSOC) {
6263                         /* This address has been removed from the asoc */
6264                         /* remove and free it */
6265                         stcb->asoc.numnets--;
6266                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6267                         sctp_free_remote_addr(net);
6268                         if (net == stcb->asoc.primary_destination) {
6269                                 stcb->asoc.primary_destination = NULL;
6270                                 sctp_select_primary_destination(stcb);
6271                         }
6272                 }
6273         }
6274         /* validate authentication required parameters */
6275         if (got_random && got_hmacs) {
6276                 stcb->asoc.peer_supports_auth = 1;
6277         } else {
6278                 stcb->asoc.peer_supports_auth = 0;
6279         }
6280         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6281                 /* peer does not support auth but sent a chunks list? */
6282                 return (-31);
6283         }
6284         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6285             !stcb->asoc.peer_supports_auth) {
6286                 /* peer supports asconf but not auth? */
6287                 return (-32);
6288         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6289             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6290                 return (-33);
6291         }
6292         /* concatenate the full random key */
6293         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6294         if (chunks != NULL) {
6295                 keylen += sizeof(*chunks) + num_chunks;
6296         }
6297         new_key = sctp_alloc_key(keylen);
6298         if (new_key != NULL) {
6299                 /* copy in the RANDOM */
6300                 if (p_random != NULL) {
6301                         keylen = sizeof(*p_random) + random_len;
6302                         bcopy(p_random, new_key->key, keylen);
6303                 }
6304                 /* append in the AUTH chunks */
6305                 if (chunks != NULL) {
6306                         bcopy(chunks, new_key->key + keylen,
6307                             sizeof(*chunks) + num_chunks);
6308                         keylen += sizeof(*chunks) + num_chunks;
6309                 }
6310                 /* append in the HMACs */
6311                 if (hmacs != NULL) {
6312                         bcopy(hmacs, new_key->key + keylen,
6313                             sizeof(*hmacs) + hmacs_len);
6314                 }
6315         } else {
6316                 /* failed to get memory for the key */
6317                 return (-34);
6318         }
6319         if (stcb->asoc.authinfo.peer_random != NULL)
6320                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6321         stcb->asoc.authinfo.peer_random = new_key;
6322         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6323         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6324
6325         return (0);
6326 }
6327
6328 int
6329 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6330     struct sctp_nets *net)
6331 {
6332         /* make sure the requested primary address exists in the assoc */
6333         if (net == NULL && sa)
6334                 net = sctp_findnet(stcb, sa);
6335
6336         if (net == NULL) {
6337                 /* didn't find the requested primary address! */
6338                 return (-1);
6339         } else {
6340                 /* set the primary address */
6341                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6342                         /* Must be confirmed, so queue to set */
6343                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6344                         return (0);
6345                 }
6346                 stcb->asoc.primary_destination = net;
6347                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6348                 net = TAILQ_FIRST(&stcb->asoc.nets);
6349                 if (net != stcb->asoc.primary_destination) {
6350                         /*
6351                          * first one on the list is NOT the primary
6352                          * sctp_cmpaddr() is much more efficent if the
6353                          * primary is the first on the list, make it so.
6354                          */
6355                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6356                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6357                 }
6358                 return (0);
6359         }
6360 }
6361
6362 int
6363 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6364 {
6365         /*
6366          * This function serves two purposes. It will see if a TAG can be
6367          * re-used and return 1 for yes it is ok and 0 for don't use that
6368          * tag. A secondary function it will do is purge out old tags that
6369          * can be removed.
6370          */
6371         struct sctpvtaghead *chain;
6372         struct sctp_tagblock *twait_block;
6373         struct sctpasochead *head;
6374         struct sctp_tcb *stcb;
6375         int i;
6376
6377         SCTP_INP_INFO_RLOCK();
6378         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6379             SCTP_BASE_INFO(hashasocmark))];
6380         if (head == NULL) {
6381                 /* invalid vtag */
6382                 goto skip_vtag_check;
6383         }
6384         LIST_FOREACH(stcb, head, sctp_asocs) {
6385                 /*
6386                  * We choose not to lock anything here. TCB's can't be
6387                  * removed since we have the read lock, so they can't be
6388                  * freed on us, same thing for the INP. I may be wrong with
6389                  * this assumption, but we will go with it for now :-)
6390                  */
6391                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6392                         continue;
6393                 }
6394                 if (stcb->asoc.my_vtag == tag) {
6395                         /* candidate */
6396                         if (stcb->rport != rport) {
6397                                 continue;
6398                         }
6399                         if (stcb->sctp_ep->sctp_lport != lport) {
6400                                 continue;
6401                         }
6402                         /* Its a used tag set */
6403                         SCTP_INP_INFO_WUNLOCK();
6404                         return (0);
6405                 }
6406         }
6407 skip_vtag_check:
6408
6409         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6410         /* Now what about timed wait ? */
6411         if (!LIST_EMPTY(chain)) {
6412                 /*
6413                  * Block(s) are present, lets see if we have this tag in the
6414                  * list
6415                  */
6416                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6417                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6418                                 if (twait_block->vtag_block[i].v_tag == 0) {
6419                                         /* not used */
6420                                         continue;
6421                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6422                                     now->tv_sec) {
6423                                         /* Audit expires this guy */
6424                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6425                                         twait_block->vtag_block[i].v_tag = 0;
6426                                         twait_block->vtag_block[i].lport = 0;
6427                                         twait_block->vtag_block[i].rport = 0;
6428                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6429                                             (twait_block->vtag_block[i].lport == lport) &&
6430                                     (twait_block->vtag_block[i].rport == rport)) {
6431                                         /* Bad tag, sorry :< */
6432                                         SCTP_INP_INFO_WUNLOCK();
6433                                         return (0);
6434                                 }
6435                         }
6436                 }
6437         }
6438         SCTP_INP_INFO_RUNLOCK();
6439         return (1);
6440 }
6441
6442
6443 static sctp_assoc_t reneged_asoc_ids[256];
6444 static uint8_t reneged_at = 0;
6445
6446
6447 static void
6448 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6449 {
6450         /*
6451          * We must hunt this association for MBUF's past the cumack (i.e.
6452          * out of order data that we can renege on).
6453          */
6454         struct sctp_association *asoc;
6455         struct sctp_tmit_chunk *chk, *nchk;
6456         uint32_t cumulative_tsn_p1;
6457         struct sctp_queued_to_read *ctl, *nctl;
6458         int cnt, strmat;
6459         uint32_t gap, i;
6460         int fnd = 0;
6461
6462         /* We look for anything larger than the cum-ack + 1 */
6463
6464         asoc = &stcb->asoc;
6465         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6466                 /* none we can reneg on. */
6467                 return;
6468         }
6469         SCTP_STAT_INCR(sctps_protocol_drains_done);
6470         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6471         cnt = 0;
6472         /* First look in the re-assembly queue */
6473         chk = TAILQ_FIRST(&asoc->reasmqueue);
6474         while (chk) {
6475                 /* Get the next one */
6476                 nchk = TAILQ_NEXT(chk, sctp_next);
6477                 if (compare_with_wrap(chk->rec.data.TSN_seq,
6478                     cumulative_tsn_p1, MAX_TSN)) {
6479                         /* Yep it is above cum-ack */
6480                         cnt++;
6481                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6482                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6483                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6484                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6485                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6486                         if (chk->data) {
6487                                 sctp_m_freem(chk->data);
6488                                 chk->data = NULL;
6489                         }
6490                         sctp_free_a_chunk(stcb, chk);
6491                 }
6492                 chk = nchk;
6493         }
6494         /* Ok that was fun, now we will drain all the inbound streams? */
6495         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6496                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6497                 while (ctl) {
6498                         nctl = TAILQ_NEXT(ctl, next);
6499                         if (compare_with_wrap(ctl->sinfo_tsn,
6500                             cumulative_tsn_p1, MAX_TSN)) {
6501                                 /* Yep it is above cum-ack */
6502                                 cnt++;
6503                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6504                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6505                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6506                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6507                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6508                                 if (ctl->data) {
6509                                         sctp_m_freem(ctl->data);
6510                                         ctl->data = NULL;
6511                                 }
6512                                 sctp_free_remote_addr(ctl->whoFrom);
6513                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6514                                 SCTP_DECR_READQ_COUNT();
6515                         }
6516                         ctl = nctl;
6517                 }
6518         }
6519         if (cnt) {
6520                 /* We must back down to see what the new highest is */
6521                 for (i = asoc->highest_tsn_inside_map;
6522                     (compare_with_wrap(i, asoc->mapping_array_base_tsn, MAX_TSN) || (i == asoc->mapping_array_base_tsn));
6523                     i--) {
6524                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6525                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6526                                 asoc->highest_tsn_inside_map = i;
6527                                 fnd = 1;
6528                                 break;
6529                         }
6530                 }
6531                 if (!fnd) {
6532                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6533                 }
6534                 /*
6535                  * Question, should we go through the delivery queue? The
6536                  * only reason things are on here is the app not reading OR
6537                  * a p-d-api up. An attacker COULD send enough in to
6538                  * initiate the PD-API and then send a bunch of stuff to
6539                  * other streams... these would wind up on the delivery
6540                  * queue.. and then we would not get to them. But in order
6541                  * to do this I then have to back-track and un-deliver
6542                  * sequence numbers in streams.. el-yucko. I think for now
6543                  * we will NOT look at the delivery queue and leave it to be
6544                  * something to consider later. An alternative would be to
6545                  * abort the P-D-API with a notification and then deliver
6546                  * the data.... Or another method might be to keep track of
6547                  * how many times the situation occurs and if we see a
6548                  * possible attack underway just abort the association.
6549                  */
6550 #ifdef SCTP_DEBUG
6551                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6552 #endif
6553                 /*
6554                  * Now do we need to find a new
6555                  * asoc->highest_tsn_inside_map?
6556                  */
6557                 asoc->last_revoke_count = cnt;
6558                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6559                 /* sa_ignore NO_NULL_CHK */
6560                 sctp_send_sack(stcb);
6561                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6562                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6563                 reneged_at++;
6564         }
6565         /*
6566          * Another issue, in un-setting the TSN's in the mapping array we
6567          * DID NOT adjust the higest_tsn marker.  This will cause one of two
6568          * things to occur. It may cause us to do extra work in checking for
6569          * our mapping array movement. More importantly it may cause us to
6570          * SACK every datagram. This may not be a bad thing though since we
6571          * will recover once we get our cum-ack above and all this stuff we
6572          * dumped recovered.
6573          */
6574 }
6575
6576 void
6577 sctp_drain()
6578 {
6579         /*
6580          * We must walk the PCB lists for ALL associations here. The system
6581          * is LOW on MBUF's and needs help. This is where reneging will
6582          * occur. We really hope this does NOT happen!
6583          */
6584         VNET_ITERATOR_DECL(vnet_iter);
6585         VNET_LIST_RLOCK_NOSLEEP();
6586         VNET_FOREACH(vnet_iter) {
6587                 CURVNET_SET(vnet_iter);
6588                 struct sctp_inpcb *inp;
6589                 struct sctp_tcb *stcb;
6590
6591                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6592                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6593 #ifdef VIMAGE
6594                         continue;
6595 #else
6596                         return;
6597 #endif
6598                 }
6599                 SCTP_INP_INFO_RLOCK();
6600                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6601                         /* For each endpoint */
6602                         SCTP_INP_RLOCK(inp);
6603                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6604                                 /* For each association */
6605                                 SCTP_TCB_LOCK(stcb);
6606                                 sctp_drain_mbufs(inp, stcb);
6607                                 SCTP_TCB_UNLOCK(stcb);
6608                         }
6609                         SCTP_INP_RUNLOCK(inp);
6610                 }
6611                 SCTP_INP_INFO_RUNLOCK();
6612                 CURVNET_RESTORE();
6613         }
6614         VNET_LIST_RUNLOCK_NOSLEEP();
6615 }
6616
6617 /*
6618  * start a new iterator
6619  * iterates through all endpoints and associations based on the pcb_state
6620  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6621  * assocs and "ef" (optional) is executed when the iterator completes.
6622  * "inpf" (optional) is executed for each new endpoint as it is being
6623  * iterated through. inpe (optional) is called when the inp completes
6624  * its way through all the stcbs.
6625  */
6626 int
6627 sctp_initiate_iterator(inp_func inpf,
6628     asoc_func af,
6629     inp_func inpe,
6630     uint32_t pcb_state,
6631     uint32_t pcb_features,
6632     uint32_t asoc_state,
6633     void *argp,
6634     uint32_t argi,
6635     end_func ef,
6636     struct sctp_inpcb *s_inp,
6637     uint8_t chunk_output_off)
6638 {
6639         struct sctp_iterator *it = NULL;
6640
6641         if (af == NULL) {
6642                 return (-1);
6643         }
6644         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6645             SCTP_M_ITER);
6646         if (it == NULL) {
6647                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6648                 return (ENOMEM);
6649         }
6650         memset(it, 0, sizeof(*it));
6651         it->function_assoc = af;
6652         it->function_inp = inpf;
6653         if (inpf)
6654                 it->done_current_ep = 0;
6655         else
6656                 it->done_current_ep = 1;
6657         it->function_atend = ef;
6658         it->pointer = argp;
6659         it->val = argi;
6660         it->pcb_flags = pcb_state;
6661         it->pcb_features = pcb_features;
6662         it->asoc_state = asoc_state;
6663         it->function_inp_end = inpe;
6664         it->no_chunk_output = chunk_output_off;
6665         it->vn = curvnet;
6666         if (s_inp) {
6667                 /* Assume lock is held here */
6668                 it->inp = s_inp;
6669                 SCTP_INP_INCR_REF(it->inp);
6670                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6671         } else {
6672                 SCTP_INP_INFO_RLOCK();
6673                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6674                 if (it->inp) {
6675                         SCTP_INP_INCR_REF(it->inp);
6676                 }
6677                 SCTP_INP_INFO_RUNLOCK();
6678                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6679
6680         }
6681         SCTP_IPI_ITERATOR_WQ_LOCK();
6682
6683         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6684         if (sctp_it_ctl.iterator_running == 0) {
6685                 sctp_wakeup_iterator();
6686         }
6687         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6688         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6689         return (0);
6690 }