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 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(MOD_INET6, MODULE_GLOBAL(MOD_INET6, 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(MOD_INET6, MODULE_GLOBAL(MOD_INET6, 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                 /* We zero'd the count */
 231                 if (vrf->vrf_addr_hash) {
 232                       SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 233                       vrf->vrf_addr_hash = NULL;
 234                 }
 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 (SCTP_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                 SCTP_IPI_ITERATOR_WQ_LOCK();
 696                 /*
 697                  * Should this really be a tailq? As it is we will process
 698                  * the newest first :-0
 699                  */
 700                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 701                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 702                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 703                     (struct sctp_inpcb *)NULL,
 704                     (struct sctp_tcb *)NULL,
 705                     (struct sctp_nets *)NULL);
 706         } else {
 707                 /* it's ready for use */
 708                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 709         }
 710         return (sctp_ifap);
 711 }
 712
 713 void
 714 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 715     uint32_t ifn_index, const char *if_name)
 716 {
 717         struct sctp_vrf *vrf;
 718         struct sctp_ifa *sctp_ifap = NULL;
 719
 720         SCTP_IPI_ADDR_WLOCK();
 721         vrf = sctp_find_vrf(vrf_id);
 722         if (vrf == NULL) {
 723                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 724                 goto out_now;
 725         }
 726 #ifdef SCTP_DEBUG
 727         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 728         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 729 #endif
 730         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 731         if (sctp_ifap) {
 732                 /* Validate the delete */
 733                 if (sctp_ifap->ifn_p) {
 734                         int valid = 0;
 735
 736                         /*-
 737                          * The name has priority over the ifn_index
 738                          * if its given. We do this especially for
 739                          * panda who might recycle indexes fast.
 740                          */
 741                         if (if_name) {
 742                                 int len1, len2;
 743
 744                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 745                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 746                                 if (len1 && len2 && (len1 == len2)) {
 747                                         /* we can compare them */
 748                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 749                                                 /*
 750                                                  * They match its a correct
 751                                                  * delete
 752                                                  */
 753                                                 valid = 1;
 754                                         }
 755                                 }
 756                         }
 757                         if (!valid) {
 758                                 /* last ditch check ifn_index */
 759                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 760                                         valid = 1;
 761                                 }
 762                         }
 763                         if (!valid) {
 764                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 765                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 766                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 767                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 768                                 SCTP_IPI_ADDR_WUNLOCK();
 769                                 return;
 770                         }
 771                 }
 772                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 773                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 774                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 775                 vrf->total_ifa_count--;
 776                 LIST_REMOVE(sctp_ifap, next_bucket);
 777                 sctp_remove_ifa_from_ifn(sctp_ifap);
 778         }
 779 #ifdef SCTP_DEBUG
 780         else {
 781                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 782                     ifn_index);
 783                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 784         }
 785 #endif
 786
 787 out_now:
 788         SCTP_IPI_ADDR_WUNLOCK();
 789         if (sctp_ifap) {
 790                 struct sctp_laddr *wi;
 791
 792                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 793                 if (wi == NULL) {
 794                         /*
 795                          * Gak, what can we do? We have lost an address
 796                          * change can you say HOSED?
 797                          */
 798                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 799
 800                         /* Oops, must decrement the count */
 801                         sctp_free_ifa(sctp_ifap);
 802                         return;
 803                 }
 804                 SCTP_INCR_LADDR_COUNT();
 805                 bzero(wi, sizeof(*wi));
 806                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 807                 wi->ifa = sctp_ifap;
 808                 wi->action = SCTP_DEL_IP_ADDRESS;
 809                 SCTP_IPI_ITERATOR_WQ_LOCK();
 810                 /*
 811                  * Should this really be a tailq? As it is we will process
 812                  * the newest first :-0
 813                  */
 814                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 815                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
 816
 817                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 818                     (struct sctp_inpcb *)NULL,
 819                     (struct sctp_tcb *)NULL,
 820                     (struct sctp_nets *)NULL);
 821         }
 822         return;
 823 }
 824
 825
 826 static struct sctp_tcb *
 827 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 828     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 829 {
 830         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 831         /*
 832          * If we support the TCP model, then we must now dig through to see
 833          * if we can find our endpoint in the list of tcp ep's.
 834          */
 835         uint16_t lport, rport;
 836         struct sctppcbhead *ephead;
 837         struct sctp_inpcb *inp;
 838         struct sctp_laddr *laddr;
 839         struct sctp_tcb *stcb;
 840         struct sctp_nets *net;
 841
 842         if ((to == NULL) || (from == NULL)) {
 843                 return (NULL);
 844         }
 845         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 846                 lport = ((struct sockaddr_in *)to)->sin_port;
 847                 rport = ((struct sockaddr_in *)from)->sin_port;
 848         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 849                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 850                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 851         } else {
 852                 return NULL;
 853         }
 854         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
 855         /*
 856          * Ok now for each of the guys in this bucket we must look and see:
 857          * - Does the remote port match. - Does there single association's
 858          * addresses match this address (to). If so we update p_ep to point
 859          * to this ep and return the tcb from it.
 860          */
 861         LIST_FOREACH(inp, ephead, sctp_hash) {
 862                 SCTP_INP_RLOCK(inp);
 863                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 864                         SCTP_INP_RUNLOCK(inp);
 865                         continue;
 866                 }
 867                 if (lport != inp->sctp_lport) {
 868                         SCTP_INP_RUNLOCK(inp);
 869                         continue;
 870                 }
 871                 if (inp->def_vrf_id != vrf_id) {
 872                         SCTP_INP_RUNLOCK(inp);
 873                         continue;
 874                 }
 875                 /* check to see if the ep has one of the addresses */
 876                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 877                         /* We are NOT bound all, so look further */
 878                         int match = 0;
 879
 880                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 881
 882                                 if (laddr->ifa == NULL) {
 883                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 884                                         continue;
 885                                 }
 886                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 887                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 888                                         continue;
 889                                 }
 890                                 if (laddr->ifa->address.sa.sa_family ==
 891                                     to->sa_family) {
 892                                         /* see if it matches */
 893                                         struct sockaddr_in *intf_addr, *sin;
 894
 895                                         intf_addr = &laddr->ifa->address.sin;
 896                                         sin = (struct sockaddr_in *)to;
 897                                         if (from->sa_family == AF_INET) {
 898                                                 if (sin->sin_addr.s_addr ==
 899                                                     intf_addr->sin_addr.s_addr) {
 900                                                         match = 1;
 901                                                         break;
 902                                                 }
 903                                         }
 904 #ifdef INET6
 905                                         if (from->sa_family == AF_INET6) {
 906                                                 struct sockaddr_in6 *intf_addr6;
 907                                                 struct sockaddr_in6 *sin6;
 908
 909                                                 sin6 = (struct sockaddr_in6 *)
 910                                                     to;
 911                                                 intf_addr6 = &laddr->ifa->address.sin6;
 912
 913                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 914                                                     intf_addr6)) {
 915                                                         match = 1;
 916                                                         break;
 917                                                 }
 918                                         }
 919 #endif
 920                                 }
 921                         }
 922                         if (match == 0) {
 923                                 /* This endpoint does not have this address */
 924                                 SCTP_INP_RUNLOCK(inp);
 925                                 continue;
 926                         }
 927                 }
 928                 /*
 929                  * Ok if we hit here the ep has the address, does it hold
 930                  * the tcb?
 931                  */
 932
 933                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 934                 if (stcb == NULL) {
 935                         SCTP_INP_RUNLOCK(inp);
 936                         continue;
 937                 }
 938                 SCTP_TCB_LOCK(stcb);
 939                 if (stcb->rport != rport) {
 940                         /* remote port does not match. */
 941                         SCTP_TCB_UNLOCK(stcb);
 942                         SCTP_INP_RUNLOCK(inp);
 943                         continue;
 944                 }
 945                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 946                         SCTP_TCB_UNLOCK(stcb);
 947                         SCTP_INP_RUNLOCK(inp);
 948                         continue;
 949                 }
 950                 /* Does this TCB have a matching address? */
 951                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 952
 953                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 954                                 /* not the same family, can't be a match */
 955                                 continue;
 956                         }
 957                         switch (from->sa_family) {
 958                         case AF_INET:
 959                                 {
 960                                         struct sockaddr_in *sin, *rsin;
 961
 962                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 963                                         rsin = (struct sockaddr_in *)from;
 964                                         if (sin->sin_addr.s_addr ==
 965                                             rsin->sin_addr.s_addr) {
 966                                                 /* found it */
 967                                                 if (netp != NULL) {
 968                                                         *netp = net;
 969                                                 }
 970                                                 /*
 971                                                  * Update the endpoint
 972                                                  * pointer
 973                                                  */
 974                                                 *inp_p = inp;
 975                                                 SCTP_INP_RUNLOCK(inp);
 976                                                 return (stcb);
 977                                         }
 978                                         break;
 979                                 }
 980 #ifdef INET6
 981                         case AF_INET6:
 982                                 {
 983                                         struct sockaddr_in6 *sin6, *rsin6;
 984
 985                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 986                                         rsin6 = (struct sockaddr_in6 *)from;
 987                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 988                                             rsin6)) {
 989                                                 /* found it */
 990                                                 if (netp != NULL) {
 991                                                         *netp = net;
 992                                                 }
 993                                                 /*
 994                                                  * Update the endpoint
 995                                                  * pointer
 996                                                  */
 997                                                 *inp_p = inp;
 998                                                 SCTP_INP_RUNLOCK(inp);
 999                                                 return (stcb);
1000                                         }
1001                                         break;
1002                                 }
1003 #endif
1004                         default:
1005                                 /* TSNH */
1006                                 break;
1007                         }
1008                 }
1009                 SCTP_TCB_UNLOCK(stcb);
1010                 SCTP_INP_RUNLOCK(inp);
1011         }
1012         return (NULL);
1013 }
1014
1015 /*
1016  * rules for use
1017  *
1018  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1019  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1020  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1021  * NULL.
1022  */
1023
1024 struct sctp_tcb *
1025 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1026     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1027 {
1028         struct sctpasochead *head;
1029         struct sctp_inpcb *inp;
1030         struct sctp_tcb *stcb = NULL;
1031         struct sctp_nets *net;
1032         uint16_t rport;
1033
1034         inp = *inp_p;
1035         if (remote->sa_family == AF_INET) {
1036                 rport = (((struct sockaddr_in *)remote)->sin_port);
1037         } else if (remote->sa_family == AF_INET6) {
1038                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1039         } else {
1040                 return (NULL);
1041         }
1042         if (locked_tcb) {
1043                 /*
1044                  * UN-lock so we can do proper locking here this occurs when
1045                  * called from load_addresses_from_init.
1046                  */
1047                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1048                 SCTP_TCB_UNLOCK(locked_tcb);
1049         }
1050         SCTP_INP_INFO_RLOCK();
1051         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1052                 /*-
1053                  * Now either this guy is our listener or it's the
1054                  * connector. If it is the one that issued the connect, then
1055                  * it's only chance is to be the first TCB in the list. If
1056                  * it is the acceptor, then do the special_lookup to hash
1057                  * and find the real inp.
1058                  */
1059                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1060                         /* to is peer addr, from is my addr */
1061                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1062                             netp, inp->def_vrf_id);
1063                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1064                                 /* we have a locked tcb, lower refcount */
1065                                 SCTP_INP_DECR_REF(inp);
1066                         }
1067                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1068                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1069                                 SCTP_TCB_LOCK(locked_tcb);
1070                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1071                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1072                         }
1073                         SCTP_INP_INFO_RUNLOCK();
1074                         return (stcb);
1075                 } else {
1076                         SCTP_INP_WLOCK(inp);
1077                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1078                                 goto null_return;
1079                         }
1080                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1081                         if (stcb == NULL) {
1082                                 goto null_return;
1083                         }
1084                         SCTP_TCB_LOCK(stcb);
1085
1086                         if (stcb->rport != rport) {
1087                                 /* remote port does not match. */
1088                                 SCTP_TCB_UNLOCK(stcb);
1089                                 goto null_return;
1090                         }
1091                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1092                                 SCTP_TCB_UNLOCK(stcb);
1093                                 goto null_return;
1094                         }
1095                         /* now look at the list of remote addresses */
1096                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1097 #ifdef INVARIANTS
1098                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1099                                         panic("Corrupt net list");
1100                                 }
1101 #endif
1102                                 if (net->ro._l_addr.sa.sa_family !=
1103                                     remote->sa_family) {
1104                                         /* not the same family */
1105                                         continue;
1106                                 }
1107                                 switch (remote->sa_family) {
1108                                 case AF_INET:
1109                                         {
1110                                                 struct sockaddr_in *sin,
1111                                                            *rsin;
1112
1113                                                 sin = (struct sockaddr_in *)
1114                                                     &net->ro._l_addr;
1115                                                 rsin = (struct sockaddr_in *)remote;
1116                                                 if (sin->sin_addr.s_addr ==
1117                                                     rsin->sin_addr.s_addr) {
1118                                                         /* found it */
1119                                                         if (netp != NULL) {
1120                                                                 *netp = net;
1121                                                         }
1122                                                         if (locked_tcb == NULL) {
1123                                                                 SCTP_INP_DECR_REF(inp);
1124                                                         } else if (locked_tcb != stcb) {
1125                                                                 SCTP_TCB_LOCK(locked_tcb);
1126                                                         }
1127                                                         if (locked_tcb) {
1128                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1129                                                         }
1130                                                         SCTP_INP_WUNLOCK(inp);
1131                                                         SCTP_INP_INFO_RUNLOCK();
1132                                                         return (stcb);
1133                                                 }
1134                                                 break;
1135                                         }
1136 #ifdef INET6
1137                                 case AF_INET6:
1138                                         {
1139                                                 struct sockaddr_in6 *sin6,
1140                                                             *rsin6;
1141
1142                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1143                                                 rsin6 = (struct sockaddr_in6 *)remote;
1144                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1145                                                     rsin6)) {
1146                                                         /* found it */
1147                                                         if (netp != NULL) {
1148                                                                 *netp = net;
1149                                                         }
1150                                                         if (locked_tcb == NULL) {
1151                                                                 SCTP_INP_DECR_REF(inp);
1152                                                         } else if (locked_tcb != stcb) {
1153                                                                 SCTP_TCB_LOCK(locked_tcb);
1154                                                         }
1155                                                         if (locked_tcb) {
1156                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1157                                                         }
1158                                                         SCTP_INP_WUNLOCK(inp);
1159                                                         SCTP_INP_INFO_RUNLOCK();
1160                                                         return (stcb);
1161                                                 }
1162                                                 break;
1163                                         }
1164 #endif
1165                                 default:
1166                                         /* TSNH */
1167                                         break;
1168                                 }
1169                         }
1170                         SCTP_TCB_UNLOCK(stcb);
1171                 }
1172         } else {
1173                 SCTP_INP_WLOCK(inp);
1174                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1175                         goto null_return;
1176                 }
1177                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1178                     inp->sctp_hashmark)];
1179                 if (head == NULL) {
1180                         goto null_return;
1181                 }
1182                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1183                         if (stcb->rport != rport) {
1184                                 /* remote port does not match */
1185                                 continue;
1186                         }
1187                         SCTP_TCB_LOCK(stcb);
1188                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189                                 SCTP_TCB_UNLOCK(stcb);
1190                                 continue;
1191                         }
1192                         /* now look at the list of remote addresses */
1193                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1194 #ifdef INVARIANTS
1195                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1196                                         panic("Corrupt net list");
1197                                 }
1198 #endif
1199                                 if (net->ro._l_addr.sa.sa_family !=
1200                                     remote->sa_family) {
1201                                         /* not the same family */
1202                                         continue;
1203                                 }
1204                                 switch (remote->sa_family) {
1205                                 case AF_INET:
1206                                         {
1207                                                 struct sockaddr_in *sin,
1208                                                            *rsin;
1209
1210                                                 sin = (struct sockaddr_in *)
1211                                                     &net->ro._l_addr;
1212                                                 rsin = (struct sockaddr_in *)remote;
1213                                                 if (sin->sin_addr.s_addr ==
1214                                                     rsin->sin_addr.s_addr) {
1215                                                         /* found it */
1216                                                         if (netp != NULL) {
1217                                                                 *netp = net;
1218                                                         }
1219                                                         if (locked_tcb == NULL) {
1220                                                                 SCTP_INP_DECR_REF(inp);
1221                                                         } else if (locked_tcb != stcb) {
1222                                                                 SCTP_TCB_LOCK(locked_tcb);
1223                                                         }
1224                                                         if (locked_tcb) {
1225                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1226                                                         }
1227                                                         SCTP_INP_WUNLOCK(inp);
1228                                                         SCTP_INP_INFO_RUNLOCK();
1229                                                         return (stcb);
1230                                                 }
1231                                                 break;
1232                                         }
1233 #ifdef INET6
1234                                 case AF_INET6:
1235                                         {
1236                                                 struct sockaddr_in6 *sin6,
1237                                                             *rsin6;
1238
1239                                                 sin6 = (struct sockaddr_in6 *)
1240                                                     &net->ro._l_addr;
1241                                                 rsin6 = (struct sockaddr_in6 *)remote;
1242                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1243                                                     rsin6)) {
1244                                                         /* found it */
1245                                                         if (netp != NULL) {
1246                                                                 *netp = net;
1247                                                         }
1248                                                         if (locked_tcb == NULL) {
1249                                                                 SCTP_INP_DECR_REF(inp);
1250                                                         } else if (locked_tcb != stcb) {
1251                                                                 SCTP_TCB_LOCK(locked_tcb);
1252                                                         }
1253                                                         if (locked_tcb) {
1254                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1255                                                         }
1256                                                         SCTP_INP_WUNLOCK(inp);
1257                                                         SCTP_INP_INFO_RUNLOCK();
1258                                                         return (stcb);
1259                                                 }
1260                                                 break;
1261                                         }
1262 #endif
1263                                 default:
1264                                         /* TSNH */
1265                                         break;
1266                                 }
1267                         }
1268                         SCTP_TCB_UNLOCK(stcb);
1269                 }
1270         }
1271 null_return:
1272         /* clean up for returning null */
1273         if (locked_tcb) {
1274                 SCTP_TCB_LOCK(locked_tcb);
1275                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1276         }
1277         SCTP_INP_WUNLOCK(inp);
1278         SCTP_INP_INFO_RUNLOCK();
1279         /* not found */
1280         return (NULL);
1281 }
1282
1283 /*
1284  * Find an association for a specific endpoint using the association id given
1285  * out in the COMM_UP notification
1286  */
1287
1288 struct sctp_tcb *
1289 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1290 {
1291         /*
1292          * Use my the assoc_id to find a endpoint
1293          */
1294         struct sctpasochead *head;
1295         struct sctp_tcb *stcb;
1296         uint32_t id;
1297
1298         if (inp == NULL) {
1299                 SCTP_PRINTF("TSNH ep_associd\n");
1300                 return (NULL);
1301         }
1302         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1303                 SCTP_PRINTF("TSNH ep_associd0\n");
1304                 return (NULL);
1305         }
1306         id = (uint32_t) asoc_id;
1307         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1308         if (head == NULL) {
1309                 /* invalid id TSNH */
1310                 SCTP_PRINTF("TSNH ep_associd1\n");
1311                 return (NULL);
1312         }
1313         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1314                 if (stcb->asoc.assoc_id == id) {
1315                         if (inp != stcb->sctp_ep) {
1316                                 /*
1317                                  * some other guy has the same id active (id
1318                                  * collision ??).
1319                                  */
1320                                 SCTP_PRINTF("TSNH ep_associd2\n");
1321                                 continue;
1322                         }
1323                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1324                                 continue;
1325                         }
1326                         if (want_lock) {
1327                                 SCTP_TCB_LOCK(stcb);
1328                         }
1329                         return (stcb);
1330                 }
1331         }
1332         return (NULL);
1333 }
1334
1335
1336 struct sctp_tcb *
1337 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1338 {
1339         struct sctp_tcb *stcb;
1340
1341         SCTP_INP_RLOCK(inp);
1342         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1343         SCTP_INP_RUNLOCK(inp);
1344         return (stcb);
1345 }
1346
1347
1348 static struct sctp_inpcb *
1349 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1350     uint16_t lport, uint32_t vrf_id)
1351 {
1352         struct sctp_inpcb *inp;
1353         struct sockaddr_in *sin;
1354
1355 #ifdef INET6
1356         struct sockaddr_in6 *sin6;
1357
1358 #endif
1359         struct sctp_laddr *laddr;
1360
1361 #ifdef INET6
1362         struct sockaddr_in6 *intf_addr6;
1363
1364 #endif
1365
1366         int fnd;
1367
1368         /*
1369          * Endpoing probe expects that the INP_INFO is locked.
1370          */
1371         sin = NULL;
1372 #ifdef INET6
1373         sin6 = NULL;
1374 #endif
1375         switch (nam->sa_family) {
1376         case AF_INET:
1377                 sin = (struct sockaddr_in *)nam;
1378                 break;
1379 #ifdef INET6
1380         case AF_INET6:
1381                 sin6 = (struct sockaddr_in6 *)nam;
1382                 break;
1383 #endif
1384         default:
1385                 /* unsupported family */
1386                 return (NULL);
1387         }
1388
1389         if (head == NULL)
1390                 return (NULL);
1391
1392         LIST_FOREACH(inp, head, sctp_hash) {
1393                 SCTP_INP_RLOCK(inp);
1394                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1395                         SCTP_INP_RUNLOCK(inp);
1396                         continue;
1397                 }
1398                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1399                     (inp->sctp_lport == lport)) {
1400                         /* got it */
1401                         if ((nam->sa_family == AF_INET) &&
1402                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1403                             SCTP_IPV6_V6ONLY(inp)) {
1404                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1405                                 SCTP_INP_RUNLOCK(inp);
1406                                 continue;
1407                         }
1408                         /* A V6 address and the endpoint is NOT bound V6 */
1409                         if (nam->sa_family == AF_INET6 &&
1410                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1411                                 SCTP_INP_RUNLOCK(inp);
1412                                 continue;
1413                         }
1414                         /* does a VRF id match? */
1415                         fnd = 0;
1416                         if (inp->def_vrf_id == vrf_id)
1417                                 fnd = 1;
1418
1419                         SCTP_INP_RUNLOCK(inp);
1420                         if (!fnd)
1421                                 continue;
1422                         return (inp);
1423                 }
1424                 SCTP_INP_RUNLOCK(inp);
1425         }
1426         if ((nam->sa_family == AF_INET) &&
1427             (sin->sin_addr.s_addr == INADDR_ANY)) {
1428                 /* Can't hunt for one that has no address specified */
1429                 return (NULL);
1430         }
1431 #ifdef INET6
1432         if ((nam->sa_family == AF_INET6) &&
1433             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1434                 /* Can't hunt for one that has no address specified */
1435                 return (NULL);
1436         }
1437 #endif
1438         /*
1439          * ok, not bound to all so see if we can find a EP bound to this
1440          * address.
1441          */
1442         LIST_FOREACH(inp, head, sctp_hash) {
1443                 SCTP_INP_RLOCK(inp);
1444                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1445                         SCTP_INP_RUNLOCK(inp);
1446                         continue;
1447                 }
1448                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1449                         SCTP_INP_RUNLOCK(inp);
1450                         continue;
1451                 }
1452                 /*
1453                  * Ok this could be a likely candidate, look at all of its
1454                  * addresses
1455                  */
1456                 if (inp->sctp_lport != lport) {
1457                         SCTP_INP_RUNLOCK(inp);
1458                         continue;
1459                 }
1460                 /* does a VRF id match? */
1461                 fnd = 0;
1462                 if (inp->def_vrf_id == vrf_id)
1463                         fnd = 1;
1464
1465                 if (!fnd) {
1466                         SCTP_INP_RUNLOCK(inp);
1467                         continue;
1468                 }
1469                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1470                         if (laddr->ifa == NULL) {
1471                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1472                                     __FUNCTION__);
1473                                 continue;
1474                         }
1475                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1476                             laddr->ifa);
1477                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1478                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1479                                 continue;
1480                         }
1481                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1482                                 /* possible, see if it matches */
1483                                 struct sockaddr_in *intf_addr;
1484
1485                                 intf_addr = &laddr->ifa->address.sin;
1486                                 switch (nam->sa_family) {
1487                                 case AF_INET:
1488                                         if (sin->sin_addr.s_addr ==
1489                                             intf_addr->sin_addr.s_addr) {
1490                                                 SCTP_INP_RUNLOCK(inp);
1491                                                 return (inp);
1492                                         }
1493                                         break;
1494 #ifdef INET6
1495                                 case AF_INET6:
1496                                         intf_addr6 = &laddr->ifa->address.sin6;
1497                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1498                                             intf_addr6)) {
1499                                                 SCTP_INP_RUNLOCK(inp);
1500                                                 return (inp);
1501                                         }
1502                                         break;
1503 #endif
1504                                 }
1505                         }
1506                 }
1507                 SCTP_INP_RUNLOCK(inp);
1508         }
1509         return (NULL);
1510 }
1511
1512
1513 static struct sctp_inpcb *
1514 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1515 {
1516         struct sctppcbhead *head;
1517         struct sctp_inpcb *t_inp;
1518         int fnd;
1519
1520         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1521             SCTP_BASE_INFO(hashmark))];
1522         LIST_FOREACH(t_inp, head, sctp_hash) {
1523                 if (t_inp->sctp_lport != lport) {
1524                         continue;
1525                 }
1526                 /* is it in the VRF in question */
1527                 fnd = 0;
1528                 if (t_inp->def_vrf_id == vrf_id)
1529                         fnd = 1;
1530                 if (!fnd)
1531                         continue;
1532
1533                 /* This one is in use. */
1534                 /* check the v6/v4 binding issue */
1535                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1536                     SCTP_IPV6_V6ONLY(t_inp)) {
1537                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1538                                 /* collision in V6 space */
1539                                 return (t_inp);
1540                         } else {
1541                                 /* inp is BOUND_V4 no conflict */
1542                                 continue;
1543                         }
1544                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1545                         /* t_inp is bound v4 and v6, conflict always */
1546                         return (t_inp);
1547                 } else {
1548                         /* t_inp is bound only V4 */
1549                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1550                             SCTP_IPV6_V6ONLY(inp)) {
1551                                 /* no conflict */
1552                                 continue;
1553                         }
1554                         /* else fall through to conflict */
1555                 }
1556                 return (t_inp);
1557         }
1558         return (NULL);
1559 }
1560
1561
1562 int
1563 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1564 {
1565         /* For 1-2-1 with port reuse */
1566         struct sctppcbhead *head;
1567         struct sctp_inpcb *tinp;
1568
1569         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1570                 /* only works with port reuse on */
1571                 return (-1);
1572         }
1573         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1574                 return (0);
1575         }
1576         SCTP_INP_RUNLOCK(inp);
1577         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1578             SCTP_BASE_INFO(hashmark))];
1579         /* Kick out all non-listeners to the TCP hash */
1580         LIST_FOREACH(tinp, head, sctp_hash) {
1581                 if (tinp->sctp_lport != inp->sctp_lport) {
1582                         continue;
1583                 }
1584                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1585                         continue;
1586                 }
1587                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1588                         continue;
1589                 }
1590                 if (tinp->sctp_socket->so_qlimit) {
1591                         continue;
1592                 }
1593                 SCTP_INP_WLOCK(tinp);
1594                 LIST_REMOVE(tinp, sctp_hash);
1595                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1596                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1597                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1598                 SCTP_INP_WUNLOCK(tinp);
1599         }
1600         SCTP_INP_WLOCK(inp);
1601         /* Pull from where he was */
1602         LIST_REMOVE(inp, sctp_hash);
1603         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1604         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1605         LIST_INSERT_HEAD(head, inp, sctp_hash);
1606         SCTP_INP_WUNLOCK(inp);
1607         SCTP_INP_RLOCK(inp);
1608         return (0);
1609 }
1610
1611
1612 struct sctp_inpcb *
1613 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1614     uint32_t vrf_id)
1615 {
1616         /*
1617          * First we check the hash table to see if someone has this port
1618          * bound with just the port.
1619          */
1620         struct sctp_inpcb *inp;
1621         struct sctppcbhead *head;
1622         struct sockaddr_in *sin;
1623         struct sockaddr_in6 *sin6;
1624         int lport;
1625
1626         if (nam->sa_family == AF_INET) {
1627                 sin = (struct sockaddr_in *)nam;
1628                 lport = ((struct sockaddr_in *)nam)->sin_port;
1629         } else if (nam->sa_family == AF_INET6) {
1630                 sin6 = (struct sockaddr_in6 *)nam;
1631                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1632         } else {
1633                 /* unsupported family */
1634                 return (NULL);
1635         }
1636         /*
1637          * I could cheat here and just cast to one of the types but we will
1638          * do it right. It also provides the check against an Unsupported
1639          * type too.
1640          */
1641         /* Find the head of the ALLADDR chain */
1642         if (have_lock == 0) {
1643                 SCTP_INP_INFO_RLOCK();
1644         }
1645         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1646             SCTP_BASE_INFO(hashmark))];
1647         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1648
1649         /*
1650          * If the TCP model exists it could be that the main listening
1651          * endpoint is gone but there exists a connected socket for this guy
1652          * yet. If so we can return the first one that we find. This may NOT
1653          * be the correct one so the caller should be wary on the return
1654          * INP. Currently the onlyc caller that sets this flag is in bindx
1655          * where we are verifying that a user CAN bind the address. He
1656          * either has bound it already, or someone else has, or its open to
1657          * bind, so this is good enough.
1658          */
1659         if (inp == NULL && find_tcp_pool) {
1660                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
1661                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1662         }
1663         if (inp) {
1664                 SCTP_INP_INCR_REF(inp);
1665         }
1666         if (have_lock == 0) {
1667                 SCTP_INP_INFO_RUNLOCK();
1668         }
1669         return (inp);
1670 }
1671
1672 /*
1673  * Find an association for an endpoint with the pointer to whom you want to
1674  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1675  * need to change the *to to some other struct like a mbuf...
1676  */
1677 struct sctp_tcb *
1678 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1679     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1680     uint32_t vrf_id)
1681 {
1682         struct sctp_inpcb *inp = NULL;
1683         struct sctp_tcb *retval;
1684
1685         SCTP_INP_INFO_RLOCK();
1686         if (find_tcp_pool) {
1687                 if (inp_p != NULL) {
1688                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1689                             vrf_id);
1690                 } else {
1691                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1692                             vrf_id);
1693                 }
1694                 if (retval != NULL) {
1695                         SCTP_INP_INFO_RUNLOCK();
1696                         return (retval);
1697                 }
1698         }
1699         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1700         if (inp_p != NULL) {
1701                 *inp_p = inp;
1702         }
1703         SCTP_INP_INFO_RUNLOCK();
1704
1705         if (inp == NULL) {
1706                 return (NULL);
1707         }
1708         /*
1709          * ok, we have an endpoint, now lets find the assoc for it (if any)
1710          * we now place the source address or from in the to of the find
1711          * endpoint call. Since in reality this chain is used from the
1712          * inbound packet side.
1713          */
1714         if (inp_p != NULL) {
1715                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1716                     NULL);
1717         } else {
1718                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1719                     NULL);
1720         }
1721         return retval;
1722 }
1723
1724
1725 /*
1726  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1727  * find all addresses that the sender has specified in any address list. Each
1728  * address will be used to lookup the TCB and see if one exits.
1729  */
1730 static struct sctp_tcb *
1731 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1732     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1733     struct sockaddr *dest)
1734 {
1735         struct sockaddr_in sin4;
1736         struct sockaddr_in6 sin6;
1737         struct sctp_paramhdr *phdr, parm_buf;
1738         struct sctp_tcb *retval;
1739         uint32_t ptype, plen;
1740
1741         memset(&sin4, 0, sizeof(sin4));
1742         memset(&sin6, 0, sizeof(sin6));
1743         sin4.sin_len = sizeof(sin4);
1744         sin4.sin_family = AF_INET;
1745         sin4.sin_port = sh->src_port;
1746         sin6.sin6_len = sizeof(sin6);
1747         sin6.sin6_family = AF_INET6;
1748         sin6.sin6_port = sh->src_port;
1749
1750         retval = NULL;
1751         offset += sizeof(struct sctp_init_chunk);
1752
1753         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1754         while (phdr != NULL) {
1755                 /* now we must see if we want the parameter */
1756                 ptype = ntohs(phdr->param_type);
1757                 plen = ntohs(phdr->param_length);
1758                 if (plen == 0) {
1759                         break;
1760                 }
1761                 if (ptype == SCTP_IPV4_ADDRESS &&
1762                     plen == sizeof(struct sctp_ipv4addr_param)) {
1763                         /* Get the rest of the address */
1764                         struct sctp_ipv4addr_param ip4_parm, *p4;
1765
1766                         phdr = sctp_get_next_param(m, offset,
1767                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1768                         if (phdr == NULL) {
1769                                 return (NULL);
1770                         }
1771                         p4 = (struct sctp_ipv4addr_param *)phdr;
1772                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1773                         /* look it up */
1774                         retval = sctp_findassociation_ep_addr(inp_p,
1775                             (struct sockaddr *)&sin4, netp, dest, NULL);
1776                         if (retval != NULL) {
1777                                 return (retval);
1778                         }
1779                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1780                     plen == sizeof(struct sctp_ipv6addr_param)) {
1781                         /* Get the rest of the address */
1782                         struct sctp_ipv6addr_param ip6_parm, *p6;
1783
1784                         phdr = sctp_get_next_param(m, offset,
1785                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1786                         if (phdr == NULL) {
1787                                 return (NULL);
1788                         }
1789                         p6 = (struct sctp_ipv6addr_param *)phdr;
1790                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1791                         /* look it up */
1792                         retval = sctp_findassociation_ep_addr(inp_p,
1793                             (struct sockaddr *)&sin6, netp, dest, NULL);
1794                         if (retval != NULL) {
1795                                 return (retval);
1796                         }
1797                 }
1798                 offset += SCTP_SIZE32(plen);
1799                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1800                     sizeof(parm_buf));
1801         }
1802         return (NULL);
1803 }
1804
1805 static int
1806 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1807 {
1808         struct sctp_nets *net;
1809
1810         /*
1811          * Simple question, the ports match, does the tcb own the to
1812          * address?
1813          */
1814         if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1815                 /* of course */
1816                 return (1);
1817         }
1818         /* have to look at all bound addresses */
1819         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1820                 if (net->ro._l_addr.sa.sa_family != to->sa_family) {
1821                         /* not the same family, can't be a match */
1822                         continue;
1823                 }
1824                 switch (to->sa_family) {
1825                 case AF_INET:
1826                         {
1827                                 struct sockaddr_in *sin, *rsin;
1828
1829                                 sin = (struct sockaddr_in *)&net->ro._l_addr;
1830                                 rsin = (struct sockaddr_in *)to;
1831                                 if (sin->sin_addr.s_addr ==
1832                                     rsin->sin_addr.s_addr) {
1833                                         /* found it */
1834                                         return (1);
1835                                 }
1836                                 break;
1837                         }
1838 #ifdef INET6
1839                 case AF_INET6:
1840                         {
1841                                 struct sockaddr_in6 *sin6, *rsin6;
1842
1843                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1844                                 rsin6 = (struct sockaddr_in6 *)to;
1845                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1846                                     rsin6)) {
1847                                         /* Update the endpoint pointer */
1848                                         return (1);
1849                                 }
1850                                 break;
1851                         }
1852 #endif
1853                 default:
1854                         /* TSNH */
1855                         break;
1856                 }
1857         }
1858         /* Nope, do not have the address ;-( */
1859         return (0);
1860 }
1861
1862 static struct sctp_tcb *
1863 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1864     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1865     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1866 {
1867         /*
1868          * Use my vtag to hash. If we find it we then verify the source addr
1869          * is in the assoc. If all goes well we save a bit on rec of a
1870          * packet.
1871          */
1872         struct sctpasochead *head;
1873         struct sctp_nets *net;
1874         struct sctp_tcb *stcb;
1875
1876         *netp = NULL;
1877         *inp_p = NULL;
1878         SCTP_INP_INFO_RLOCK();
1879         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1880             SCTP_BASE_INFO(hashasocmark))];
1881         if (head == NULL) {
1882                 /* invalid vtag */
1883                 SCTP_INP_INFO_RUNLOCK();
1884                 return (NULL);
1885         }
1886         LIST_FOREACH(stcb, head, sctp_asocs) {
1887                 SCTP_INP_RLOCK(stcb->sctp_ep);
1888                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1890                         continue;
1891                 }
1892                 SCTP_TCB_LOCK(stcb);
1893                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1894                 if (stcb->asoc.my_vtag == vtag) {
1895                         /* candidate */
1896                         if (stcb->rport != rport) {
1897                                 SCTP_TCB_UNLOCK(stcb);
1898                                 continue;
1899                         }
1900                         if (stcb->sctp_ep->sctp_lport != lport) {
1901                                 SCTP_TCB_UNLOCK(stcb);
1902                                 continue;
1903                         }
1904                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1905                                 SCTP_TCB_UNLOCK(stcb);
1906                                 continue;
1907                         }
1908                         /* RRS:Need toaddr check here */
1909                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
1910                                 /* Endpoint does not own this address */
1911                                 SCTP_TCB_UNLOCK(stcb);
1912                                 continue;
1913                         }
1914                         if (remote_tag) {
1915                                 /*
1916                                  * If we have both vtags thats all we match
1917                                  * on
1918                                  */
1919                                 if (stcb->asoc.peer_vtag == remote_tag) {
1920                                         /*
1921                                          * If both tags match we consider it
1922                                          * conclusive and check NO
1923                                          * source/destination addresses
1924                                          */
1925                                         goto conclusive;
1926                                 }
1927                         }
1928                         if (skip_src_check) {
1929                 conclusive:
1930                                 if (from) {
1931                                         net = sctp_findnet(stcb, from);
1932                                 } else {
1933                                         *netp = NULL;   /* unknown */
1934                                 }
1935                                 if (inp_p)
1936                                         *inp_p = stcb->sctp_ep;
1937                                 SCTP_INP_INFO_RUNLOCK();
1938                                 return (stcb);
1939                         }
1940                         net = sctp_findnet(stcb, from);
1941                         if (net) {
1942                                 /* yep its him. */
1943                                 *netp = net;
1944                                 SCTP_STAT_INCR(sctps_vtagexpress);
1945                                 *inp_p = stcb->sctp_ep;
1946                                 SCTP_INP_INFO_RUNLOCK();
1947                                 return (stcb);
1948                         } else {
1949                                 /*
1950                                  * not him, this should only happen in rare
1951                                  * cases so I peg it.
1952                                  */
1953                                 SCTP_STAT_INCR(sctps_vtagbogus);
1954                         }
1955                 }
1956                 SCTP_TCB_UNLOCK(stcb);
1957         }
1958         SCTP_INP_INFO_RUNLOCK();
1959         return (NULL);
1960 }
1961
1962 /*
1963  * Find an association with the pointer to the inbound IP packet. This can be
1964  * a IPv4 or IPv6 packet.
1965  */
1966 struct sctp_tcb *
1967 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
1968     struct sctphdr *sh, struct sctp_chunkhdr *ch,
1969     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
1970 {
1971         int find_tcp_pool;
1972         struct ip *iph;
1973         struct sctp_tcb *retval;
1974         struct sockaddr_storage to_store, from_store;
1975         struct sockaddr *to = (struct sockaddr *)&to_store;
1976         struct sockaddr *from = (struct sockaddr *)&from_store;
1977         struct sctp_inpcb *inp;
1978
1979         iph = mtod(m, struct ip *);
1980         switch (iph->ip_v) {
1981         case IPVERSION:
1982                 {
1983                         /* its IPv4 */
1984                         struct sockaddr_in *from4;
1985
1986                         from4 = (struct sockaddr_in *)&from_store;
1987                         bzero(from4, sizeof(*from4));
1988                         from4->sin_family = AF_INET;
1989                         from4->sin_len = sizeof(struct sockaddr_in);
1990                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
1991                         from4->sin_port = sh->src_port;
1992                         break;
1993                 }
1994 #ifdef INET6
1995         case IPV6_VERSION >> 4:
1996                 {
1997                         /* its IPv6 */
1998                         struct ip6_hdr *ip6;
1999                         struct sockaddr_in6 *from6;
2000
2001                         ip6 = mtod(m, struct ip6_hdr *);
2002                         from6 = (struct sockaddr_in6 *)&from_store;
2003                         bzero(from6, sizeof(*from6));
2004                         from6->sin6_family = AF_INET6;
2005                         from6->sin6_len = sizeof(struct sockaddr_in6);
2006                         from6->sin6_addr = ip6->ip6_src;
2007                         from6->sin6_port = sh->src_port;
2008                         /* Get the scopes in properly to the sin6 addr's */
2009                         /* we probably don't need these operations */
2010                         (void)sa6_recoverscope(from6);
2011                         sa6_embedscope(from6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)));
2012                         break;
2013                 }
2014 #endif
2015         default:
2016                 /* Currently not supported. */
2017                 return (NULL);
2018         }
2019
2020
2021         switch (iph->ip_v) {
2022         case IPVERSION:
2023                 {
2024                         /* its IPv4 */
2025                         struct sockaddr_in *to4;
2026
2027                         to4 = (struct sockaddr_in *)&to_store;
2028                         bzero(to4, sizeof(*to4));
2029                         to4->sin_family = AF_INET;
2030                         to4->sin_len = sizeof(struct sockaddr_in);
2031                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2032                         to4->sin_port = sh->dest_port;
2033                         break;
2034                 }
2035 #ifdef INET6
2036         case IPV6_VERSION >> 4:
2037                 {
2038                         /* its IPv6 */
2039                         struct ip6_hdr *ip6;
2040                         struct sockaddr_in6 *to6;
2041
2042                         ip6 = mtod(m, struct ip6_hdr *);
2043                         to6 = (struct sockaddr_in6 *)&to_store;
2044                         bzero(to6, sizeof(*to6));
2045                         to6->sin6_family = AF_INET6;
2046                         to6->sin6_len = sizeof(struct sockaddr_in6);
2047                         to6->sin6_addr = ip6->ip6_dst;
2048                         to6->sin6_port = sh->dest_port;
2049                         /* Get the scopes in properly to the sin6 addr's */
2050                         /* we probably don't need these operations */
2051                         (void)sa6_recoverscope(to6);
2052                         sa6_embedscope(to6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)));
2053                         break;
2054                 }
2055 #endif
2056         default:
2057                 /* TSNH */
2058                 break;
2059         }
2060         if (sh->v_tag) {
2061                 /* we only go down this path if vtag is non-zero */
2062                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2063                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2064                 if (retval) {
2065                         return (retval);
2066                 }
2067         }
2068         find_tcp_pool = 0;
2069         if ((ch->chunk_type != SCTP_INITIATION) &&
2070             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2071             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2072             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2073                 /* Other chunk types go to the tcp pool. */
2074                 find_tcp_pool = 1;
2075         }
2076         if (inp_p) {
2077                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2078                     find_tcp_pool, vrf_id);
2079                 inp = *inp_p;
2080         } else {
2081                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2082                     find_tcp_pool, vrf_id);
2083         }
2084         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2085         if (retval == NULL && inp) {
2086                 /* Found a EP but not this address */
2087                 if ((ch->chunk_type == SCTP_INITIATION) ||
2088                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2089                         /*-
2090                          * special hook, we do NOT return linp or an
2091                          * association that is linked to an existing
2092                          * association that is under the TCP pool (i.e. no
2093                          * listener exists). The endpoint finding routine
2094                          * will always find a listner before examining the
2095                          * TCP pool.
2096                          */
2097                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2098                                 if (inp_p) {
2099                                         *inp_p = NULL;
2100                                 }
2101                                 return (NULL);
2102                         }
2103                         retval = sctp_findassociation_special_addr(m, iphlen,
2104                             offset, sh, &inp, netp, to);
2105                         if (inp_p != NULL) {
2106                                 *inp_p = inp;
2107                         }
2108                 }
2109         }
2110         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2111         return (retval);
2112 }
2113
2114 /*
2115  * lookup an association by an ASCONF lookup address.
2116  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2117  */
2118 struct sctp_tcb *
2119 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2120     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2121 {
2122         struct sctp_tcb *stcb;
2123         struct sockaddr_in *sin;
2124
2125 #ifdef INET6
2126         struct sockaddr_in6 *sin6;
2127
2128 #endif
2129         struct sockaddr_storage local_store, remote_store;
2130         struct sockaddr *to;
2131         struct ip *iph;
2132
2133 #ifdef INET6
2134         struct ip6_hdr *ip6;
2135
2136 #endif
2137         struct sctp_paramhdr parm_buf, *phdr;
2138         int ptype;
2139         int zero_address = 0;
2140
2141
2142         memset(&local_store, 0, sizeof(local_store));
2143         memset(&remote_store, 0, sizeof(remote_store));
2144         to = (struct sockaddr *)&local_store;
2145         /* First get the destination address setup too. */
2146         iph = mtod(m, struct ip *);
2147         switch (iph->ip_v) {
2148         case IPVERSION:
2149                 /* its IPv4 */
2150                 sin = (struct sockaddr_in *)&local_store;
2151                 sin->sin_family = AF_INET;
2152                 sin->sin_len = sizeof(*sin);
2153                 sin->sin_port = sh->dest_port;
2154                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2155                 break;
2156 #ifdef INET6
2157         case IPV6_VERSION >> 4:
2158                 /* its IPv6 */
2159                 ip6 = mtod(m, struct ip6_hdr *);
2160                 sin6 = (struct sockaddr_in6 *)&local_store;
2161                 sin6->sin6_family = AF_INET6;
2162                 sin6->sin6_len = sizeof(*sin6);
2163                 sin6->sin6_port = sh->dest_port;
2164                 sin6->sin6_addr = ip6->ip6_dst;
2165                 break;
2166 #endif
2167         default:
2168                 return NULL;
2169         }
2170
2171         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2172             &parm_buf, sizeof(struct sctp_paramhdr));
2173         if (phdr == NULL) {
2174                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2175                     __FUNCTION__);
2176                 return NULL;
2177         }
2178         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2179         /* get the correlation address */
2180         switch (ptype) {
2181 #ifdef INET6
2182         case SCTP_IPV6_ADDRESS:
2183                 {
2184                         /* ipv6 address param */
2185                         struct sctp_ipv6addr_param *p6, p6_buf;
2186
2187                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2188                                 return NULL;
2189                         }
2190                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2191                             offset + sizeof(struct sctp_asconf_chunk),
2192                             &p6_buf.ph, sizeof(*p6));
2193                         if (p6 == NULL) {
2194                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2195                                     __FUNCTION__);
2196                                 return (NULL);
2197                         }
2198                         sin6 = (struct sockaddr_in6 *)&remote_store;
2199                         sin6->sin6_family = AF_INET6;
2200                         sin6->sin6_len = sizeof(*sin6);
2201                         sin6->sin6_port = sh->src_port;
2202                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2203                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2204                                 zero_address = 1;
2205                         break;
2206                 }
2207 #endif
2208         case SCTP_IPV4_ADDRESS:
2209                 {
2210                         /* ipv4 address param */
2211                         struct sctp_ipv4addr_param *p4, p4_buf;
2212
2213                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2214                                 return NULL;
2215                         }
2216                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2217                             offset + sizeof(struct sctp_asconf_chunk),
2218                             &p4_buf.ph, sizeof(*p4));
2219                         if (p4 == NULL) {
2220                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2221                                     __FUNCTION__);
2222                                 return (NULL);
2223                         }
2224                         sin = (struct sockaddr_in *)&remote_store;
2225                         sin->sin_family = AF_INET;
2226                         sin->sin_len = sizeof(*sin);
2227                         sin->sin_port = sh->src_port;
2228                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2229                         if (sin->sin_addr.s_addr == INADDR_ANY)
2230                                 zero_address = 1;
2231                         break;
2232                 }
2233         default:
2234                 /* invalid address param type */
2235                 return NULL;
2236         }
2237
2238         if (zero_address) {
2239                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2240                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2241                 /*
2242                  * printf("findassociation_ep_asconf: zero lookup address
2243                  * finds stcb 0x%x\n", (uint32_t)stcb);
2244                  */
2245         } else {
2246                 stcb = sctp_findassociation_ep_addr(inp_p,
2247                     (struct sockaddr *)&remote_store, netp,
2248                     to, NULL);
2249         }
2250         return (stcb);
2251 }
2252
2253
2254 /*
2255  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2256  * addresses. This way if we don't get a bind we by default pick a ephemeral
2257  * port with all addresses bound.
2258  */
2259 int
2260 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2261 {
2262         /*
2263          * we get called when a new endpoint starts up. We need to allocate
2264          * the sctp_inpcb structure from the zone and init it. Mark it as
2265          * unbound and find a port that we can use as an ephemeral with
2266          * INADDR_ANY. If the user binds later no problem we can then add in
2267          * the specific addresses. And setup the default parameters for the
2268          * EP.
2269          */
2270         int i, error;
2271         struct sctp_inpcb *inp;
2272         struct sctp_pcb *m;
2273         struct timeval time;
2274         sctp_sharedkey_t *null_key;
2275
2276         error = 0;
2277
2278         SCTP_INP_INFO_WLOCK();
2279         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2280         if (inp == NULL) {
2281                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2282                 SCTP_INP_INFO_WUNLOCK();
2283                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2284                 return (ENOBUFS);
2285         }
2286         /* zap it */
2287         bzero(inp, sizeof(*inp));
2288
2289         /* bump generations */
2290         /* setup socket pointers */
2291         inp->sctp_socket = so;
2292         inp->ip_inp.inp.inp_socket = so;
2293         inp->sctp_associd_counter = 1;
2294         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2295         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2296         /* init the small hash table we use to track asocid <-> tcb */
2297         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2298         if (inp->sctp_asocidhash == NULL) {
2299                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2300                 SCTP_INP_INFO_WUNLOCK();
2301                 return error;
2302         }
2303 #ifdef IPSEC
2304         {
2305                 struct inpcbpolicy *pcb_sp = NULL;
2306
2307                 error = ipsec_init_policy(so, &pcb_sp);
2308                 /* Arrange to share the policy */
2309                 inp->ip_inp.inp.inp_sp = pcb_sp;
2310                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2311         }
2312         if (error != 0) {
2313                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2314                 SCTP_INP_INFO_WUNLOCK();
2315                 return error;
2316         }
2317 #endif                          /* IPSEC */
2318         SCTP_INCR_EP_COUNT();
2319         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(MOD_INET, ip_defttl);
2320         SCTP_INP_INFO_WUNLOCK();
2321
2322         so->so_pcb = (caddr_t)inp;
2323
2324         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2325             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2326                 /* UDP style socket */
2327                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2328                     SCTP_PCB_FLAGS_UNBOUND);
2329                 /* Be sure it is NON-BLOCKING IO for UDP */
2330                 /* SCTP_SET_SO_NBIO(so); */
2331         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2332                 /* TCP style socket */
2333                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2334                     SCTP_PCB_FLAGS_UNBOUND);
2335                 /* Be sure we have blocking IO by default */
2336                 SCTP_CLEAR_SO_NBIO(so);
2337         } else {
2338                 /*
2339                  * unsupported socket type (RAW, etc)- in case we missed it
2340                  * in protosw
2341                  */
2342                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2343                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2344                 return (EOPNOTSUPP);
2345         }
2346         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2347                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2348                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2349         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2350                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2351                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2352         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2353                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2354                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2355         }
2356         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2357             &inp->sctp_hashmark);
2358         if (inp->sctp_tcbhash == NULL) {
2359                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2360                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
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
2508         /* Now insert the new_inp into the TCP connected hash */
2509         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2510             SCTP_BASE_INFO(hashtcpmark))];
2511
2512         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2513         /* Its safe to access */
2514         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2515
2516         /* Now move the tcb into the endpoint list */
2517         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2518         /*
2519          * Question, do we even need to worry about the ep-hash since we
2520          * only have one connection? Probably not :> so lets get rid of it
2521          * and not suck up any kernel memory in that.
2522          */
2523
2524         /* Ok. Let's restart timer. */
2525         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2526                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2527                     stcb, net);
2528         }
2529
2530         SCTP_INP_INFO_WUNLOCK();
2531         if (new_inp->sctp_tcbhash != NULL) {
2532                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2533                 new_inp->sctp_tcbhash = NULL;
2534         }
2535         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2536                 /* Subset bound, so copy in the laddr list from the old_inp */
2537                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2538                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2539                         if (laddr == NULL) {
2540                                 /*
2541                                  * Gak, what can we do? This assoc is really
2542                                  * HOSED. We probably should send an abort
2543                                  * here.
2544                                  */
2545                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2546                                 continue;
2547                         }
2548                         SCTP_INCR_LADDR_COUNT();
2549                         bzero(laddr, sizeof(*laddr));
2550                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2551                         laddr->ifa = oladdr->ifa;
2552                         atomic_add_int(&laddr->ifa->refcount, 1);
2553                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2554                             sctp_nxt_addr);
2555                         new_inp->laddr_count++;
2556                 }
2557         }
2558         /*
2559          * Now any running timers need to be adjusted since we really don't
2560          * care if they are running or not just blast in the new_inp into
2561          * all of them.
2562          */
2563
2564         stcb->asoc.hb_timer.ep = (void *)new_inp;
2565         stcb->asoc.dack_timer.ep = (void *)new_inp;
2566         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2567         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2568         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2569         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2570         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2571         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2572         /* now what about the nets? */
2573         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2574                 net->pmtu_timer.ep = (void *)new_inp;
2575                 net->rxt_timer.ep = (void *)new_inp;
2576                 net->fr_timer.ep = (void *)new_inp;
2577         }
2578         SCTP_INP_WUNLOCK(new_inp);
2579         SCTP_INP_WUNLOCK(old_inp);
2580 }
2581
2582
2583
2584
2585 /* sctp_ifap is used to bypass normal local address validation checks */
2586 int
2587 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2588     struct sctp_ifa *sctp_ifap, struct thread *p)
2589 {
2590         /* bind a ep to a socket address */
2591         struct sctppcbhead *head;
2592         struct sctp_inpcb *inp, *inp_tmp;
2593         struct inpcb *ip_inp;
2594         int port_reuse_active = 0;
2595         int bindall;
2596         uint16_t lport;
2597         int error;
2598         uint32_t vrf_id;
2599
2600         lport = 0;
2601         error = 0;
2602         bindall = 1;
2603         inp = (struct sctp_inpcb *)so->so_pcb;
2604         ip_inp = (struct inpcb *)so->so_pcb;
2605 #ifdef SCTP_DEBUG
2606         if (addr) {
2607                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2608                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2609                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2610                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2611         }
2612 #endif
2613         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2614                 /* already did a bind, subsequent binds NOT allowed ! */
2615                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2616                 return (EINVAL);
2617         }
2618 #ifdef INVARIANTS
2619         if (p == NULL)
2620                 panic("null proc/thread");
2621 #endif
2622         if (addr != NULL) {
2623                 switch (addr->sa_family) {
2624                 case AF_INET:
2625                         {
2626                                 struct sockaddr_in *sin;
2627
2628                                 /* IPV6_V6ONLY socket? */
2629                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2630                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2631                                         return (EINVAL);
2632                                 }
2633                                 if (addr->sa_len != sizeof(*sin)) {
2634                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2635                                         return (EINVAL);
2636                                 }
2637                                 sin = (struct sockaddr_in *)addr;
2638                                 lport = sin->sin_port;
2639                                 /*
2640                                  * For LOOPBACK the prison_local_ip4() call
2641                                  * will transmute the ip address to the
2642                                  * proper value.
2643                                  */
2644                                 if (p && prison_local_ip4(p->td_ucred, &sin->sin_addr) != 0) {
2645                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2646                                         return (EINVAL);
2647                                 }
2648                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2649                                         bindall = 0;
2650                                 }
2651                                 break;
2652                         }
2653 #ifdef INET6
2654                 case AF_INET6:
2655                         {
2656                                 /*
2657                                  * Only for pure IPv6 Address. (No IPv4
2658                                  * Mapped!)
2659                                  */
2660                                 struct sockaddr_in6 *sin6;
2661
2662                                 sin6 = (struct sockaddr_in6 *)addr;
2663
2664                                 if (addr->sa_len != sizeof(*sin6)) {
2665                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2666                                         return (EINVAL);
2667                                 }
2668                                 lport = sin6->sin6_port;
2669
2670                                 /*
2671                                  * For LOOPBACK the prison_local_ip6() call
2672                                  * will transmute the ipv6 address to the
2673                                  * proper value.
2674                                  */
2675                                 if (p && prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2676                                     (SCTP_IPV6_V6ONLY(inp) != 0)) != 0) {
2677                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2678                                         return (EINVAL);
2679                                 }
2680                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2681                                         bindall = 0;
2682                                         /* KAME hack: embed scopeid */
2683                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) {
2684                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2685                                                 return (EINVAL);
2686                                         }
2687                                 }
2688                                 /* this must be cleared for ifa_ifwithaddr() */
2689                                 sin6->sin6_scope_id = 0;
2690                                 break;
2691                         }
2692 #endif
2693                 default:
2694                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2695                         return (EAFNOSUPPORT);
2696                 }
2697         }
2698         SCTP_INP_INFO_WLOCK();
2699         SCTP_INP_WLOCK(inp);
2700         /* Setup a vrf_id to be the default for the non-bind-all case. */
2701         vrf_id = inp->def_vrf_id;
2702
2703         /* increase our count due to the unlock we do */
2704         SCTP_INP_INCR_REF(inp);
2705         if (lport) {
2706                 /*
2707                  * Did the caller specify a port? if so we must see if a ep
2708                  * already has this one bound.
2709                  */
2710                 /* got to be root to get at low ports */
2711                 if (ntohs(lport) < IPPORT_RESERVED) {
2712                         if (p && (error =
2713                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2714                             )) {
2715                                 SCTP_INP_DECR_REF(inp);
2716                                 SCTP_INP_WUNLOCK(inp);
2717                                 SCTP_INP_INFO_WUNLOCK();
2718                                 return (error);
2719                         }
2720                 }
2721                 if (p == NULL) {
2722                         SCTP_INP_DECR_REF(inp);
2723                         SCTP_INP_WUNLOCK(inp);
2724                         SCTP_INP_INFO_WUNLOCK();
2725                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2726                         return (error);
2727                 }
2728                 SCTP_INP_WUNLOCK(inp);
2729                 if (bindall) {
2730                         vrf_id = inp->def_vrf_id;
2731                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2732                         if (inp_tmp != NULL) {
2733                                 /*
2734                                  * lock guy returned and lower count note
2735                                  * that we are not bound so inp_tmp should
2736                                  * NEVER be inp. And it is this inp
2737                                  * (inp_tmp) that gets the reference bump,
2738                                  * so we must lower it.
2739                                  */
2740                                 SCTP_INP_DECR_REF(inp_tmp);
2741                                 /* unlock info */
2742                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2743                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2744                                         /*
2745                                          * Ok, must be one-2-one and
2746                                          * allowing port re-use
2747                                          */
2748                                         port_reuse_active = 1;
2749                                         goto continue_anyway;
2750                                 }
2751                                 SCTP_INP_DECR_REF(inp);
2752                                 SCTP_INP_INFO_WUNLOCK();
2753                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2754                                 return (EADDRINUSE);
2755                         }
2756                 } else {
2757                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2758                         if (inp_tmp != NULL) {
2759                                 /*
2760                                  * lock guy returned and lower count note
2761                                  * that we are not bound so inp_tmp should
2762                                  * NEVER be inp. And it is this inp
2763                                  * (inp_tmp) that gets the reference bump,
2764                                  * so we must lower it.
2765                                  */
2766                                 SCTP_INP_DECR_REF(inp_tmp);
2767                                 /* unlock info */
2768                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2769                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2770                                         /*
2771                                          * Ok, must be one-2-one and
2772                                          * allowing port re-use
2773                                          */
2774                                         port_reuse_active = 1;
2775                                         goto continue_anyway;
2776                                 }
2777                                 SCTP_INP_DECR_REF(inp);
2778                                 SCTP_INP_INFO_WUNLOCK();
2779                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2780                                 return (EADDRINUSE);
2781                         }
2782                 }
2783 continue_anyway:
2784                 SCTP_INP_WLOCK(inp);
2785                 if (bindall) {
2786                         /* verify that no lport is not used by a singleton */
2787                         if ((port_reuse_active == 0) &&
2788                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2789                             ) {
2790                                 /* Sorry someone already has this one bound */
2791                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2792                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2793                                         port_reuse_active = 1;
2794                                 } else {
2795                                         SCTP_INP_DECR_REF(inp);
2796                                         SCTP_INP_WUNLOCK(inp);
2797                                         SCTP_INP_INFO_WUNLOCK();
2798                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2799                                         return (EADDRINUSE);
2800                                 }
2801                         }
2802                 }
2803         } else {
2804                 uint16_t first, last, candidate;
2805                 uint16_t count;
2806                 int done;
2807
2808                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2809                         first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto);
2810                         last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto);
2811                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2812                         if (p && (error =
2813                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2814                             )) {
2815                                 SCTP_INP_DECR_REF(inp);
2816                                 SCTP_INP_WUNLOCK(inp);
2817                                 SCTP_INP_INFO_WUNLOCK();
2818                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2819                                 return (error);
2820                         }
2821                         first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto);
2822                         last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto);
2823                 } else {
2824                         first = MODULE_GLOBAL(MOD_INET, ipport_firstauto);
2825                         last = MODULE_GLOBAL(MOD_INET, ipport_lastauto);
2826                 }
2827                 if (first > last) {
2828                         uint16_t temp;
2829
2830                         temp = first;
2831                         first = last;
2832                         last = temp;
2833                 }
2834                 count = last - first + 1;       /* number of candidates */
2835                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2836
2837                 done = 0;
2838                 while (!done) {
2839                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2840                                 done = 1;
2841                         }
2842                         if (!done) {
2843                                 if (--count == 0) {
2844                                         SCTP_INP_DECR_REF(inp);
2845                                         SCTP_INP_WUNLOCK(inp);
2846                                         SCTP_INP_INFO_WUNLOCK();
2847                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2848                                         return (EADDRINUSE);
2849                                 }
2850                                 if (candidate == last)
2851                                         candidate = first;
2852                                 else
2853                                         candidate = candidate + 1;
2854                         }
2855                 }
2856                 lport = htons(candidate);
2857         }
2858         SCTP_INP_DECR_REF(inp);
2859         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2860             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2861                 /*
2862                  * this really should not happen. The guy did a non-blocking
2863                  * bind and then did a close at the same time.
2864                  */
2865                 SCTP_INP_WUNLOCK(inp);
2866                 SCTP_INP_INFO_WUNLOCK();
2867                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2868                 return (EINVAL);
2869         }
2870         /* ok we look clear to give out this port, so lets setup the binding */
2871         if (bindall) {
2872                 /* binding to all addresses, so just set in the proper flags */
2873                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2874                 /* set the automatic addr changes from kernel flag */
2875                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2876                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2877                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2878                 } else {
2879                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2880                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2881                 }
2882                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2883                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2884                 } else {
2885                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2886                 }
2887                 /*
2888                  * set the automatic mobility_base from kernel flag (by
2889                  * micchie)
2890                  */
2891                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2892                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2893                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2894                 } else {
2895                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2896                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2897                 }
2898                 /*
2899                  * set the automatic mobility_fasthandoff from kernel flag
2900                  * (by micchie)
2901                  */
2902                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
2903                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
2904                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2905                 } else {
2906                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
2907                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2908                 }
2909         } else {
2910                 /*
2911                  * bind specific, make sure flags is off and add a new
2912                  * address structure to the sctp_addr_list inside the ep
2913                  * structure.
2914                  *
2915                  * We will need to allocate one and insert it at the head. The
2916                  * socketopt call can just insert new addresses in there as
2917                  * well. It will also have to do the embed scope kame hack
2918                  * too (before adding).
2919                  */
2920                 struct sctp_ifa *ifa;
2921                 struct sockaddr_storage store_sa;
2922
2923                 memset(&store_sa, 0, sizeof(store_sa));
2924                 if (addr->sa_family == AF_INET) {
2925                         struct sockaddr_in *sin;
2926
2927                         sin = (struct sockaddr_in *)&store_sa;
2928                         memcpy(sin, addr, sizeof(struct sockaddr_in));
2929                         sin->sin_port = 0;
2930                 } else if (addr->sa_family == AF_INET6) {
2931                         struct sockaddr_in6 *sin6;
2932
2933                         sin6 = (struct sockaddr_in6 *)&store_sa;
2934                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
2935                         sin6->sin6_port = 0;
2936                 }
2937                 /*
2938                  * first find the interface with the bound address need to
2939                  * zero out the port to find the address! yuck! can't do
2940                  * this earlier since need port for sctp_pcb_findep()
2941                  */
2942                 if (sctp_ifap != NULL)
2943                         ifa = sctp_ifap;
2944                 else {
2945                         /*
2946                          * Note for BSD we hit here always other O/S's will
2947                          * pass things in via the sctp_ifap argument
2948                          * (Panda).
2949                          */
2950                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
2951                             vrf_id, SCTP_ADDR_NOT_LOCKED);
2952                 }
2953                 if (ifa == NULL) {
2954                         /* Can't find an interface with that address */
2955                         SCTP_INP_WUNLOCK(inp);
2956                         SCTP_INP_INFO_WUNLOCK();
2957                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
2958                         return (EADDRNOTAVAIL);
2959                 }
2960                 if (addr->sa_family == AF_INET6) {
2961                         /* GAK, more FIXME IFA lock? */
2962                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2963                                 /* Can't bind a non-existent addr. */
2964                                 SCTP_INP_WUNLOCK(inp);
2965                                 SCTP_INP_INFO_WUNLOCK();
2966                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2967                                 return (EINVAL);
2968                         }
2969                 }
2970                 /* we're not bound all */
2971                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
2972                 /* allow bindx() to send ASCONF's for binding changes */
2973                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2974                 /* clear automatic addr changes from kernel flag */
2975                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2976
2977                 /* add this address to the endpoint list */
2978                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
2979                 if (error != 0) {
2980                         SCTP_INP_WUNLOCK(inp);
2981                         SCTP_INP_INFO_WUNLOCK();
2982                         return (error);
2983                 }
2984                 inp->laddr_count++;
2985         }
2986         /* find the bucket */
2987         if (port_reuse_active) {
2988                 /* Put it into tcp 1-2-1 hash */
2989                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2990                     SCTP_BASE_INFO(hashtcpmark))];
2991                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
2992         } else {
2993                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
2994                     SCTP_BASE_INFO(hashmark))];
2995         }
2996         /* put it in the bucket */
2997         LIST_INSERT_HEAD(head, inp, sctp_hash);
2998         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
2999             head, ntohs(lport), port_reuse_active);
3000         /* set in the port */
3001         inp->sctp_lport = lport;
3002
3003         /* turn off just the unbound flag */
3004         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3005         SCTP_INP_WUNLOCK(inp);
3006         SCTP_INP_INFO_WUNLOCK();
3007         return (0);
3008 }
3009
3010
3011 static void
3012 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
3013 {
3014         struct sctp_iterator *it;
3015
3016         /*
3017          * We enter with the only the ITERATOR_LOCK in place and a write
3018          * lock on the inp_info stuff.
3019          */
3020
3021         /*
3022          * Go through all iterators, we must do this since it is possible
3023          * that some iterator does NOT have the lock, but is waiting for it.
3024          * And the one that had the lock has either moved in the last
3025          * iteration or we just cleared it above. We need to find all of
3026          * those guys. The list of iterators should never be very big
3027          * though.
3028          */
3029         TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) {
3030                 if (it == inp->inp_starting_point_for_iterator)
3031                         /* skip this guy, he's special */
3032                         continue;
3033                 if (it->inp == inp) {
3034                         /*
3035                          * This is tricky and we DON'T lock the iterator.
3036                          * Reason is he's running but waiting for me since
3037                          * inp->inp_starting_point_for_iterator has the lock
3038                          * on me (the guy above we skipped). This tells us
3039                          * its is not running but waiting for
3040                          * inp->inp_starting_point_for_iterator to be
3041                          * released by the guy that does have our INP in a
3042                          * lock.
3043                          */
3044                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3045                                 it->inp = NULL;
3046                                 it->stcb = NULL;
3047                         } else {
3048                                 /* set him up to do the next guy not me */
3049                                 it->inp = inp_next;
3050                                 it->stcb = NULL;
3051                         }
3052                 }
3053         }
3054         it = inp->inp_starting_point_for_iterator;
3055         if (it) {
3056                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3057                         it->inp = NULL;
3058                 } else {
3059                         it->inp = inp_next;
3060                 }
3061                 it->stcb = NULL;
3062         }
3063 }
3064
3065 /* release sctp_inpcb unbind the port */
3066 void
3067 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3068 {
3069         /*
3070          * Here we free a endpoint. We must find it (if it is in the Hash
3071          * table) and remove it from there. Then we must also find it in the
3072          * overall list and remove it from there. After all removals are
3073          * complete then any timer has to be stopped. Then start the actual
3074          * freeing. a) Any local lists. b) Any associations. c) The hash of
3075          * all associations. d) finally the ep itself.
3076          */
3077         struct sctp_pcb *m;
3078         struct sctp_inpcb *inp_save;
3079         struct sctp_tcb *asoc, *nasoc;
3080         struct sctp_laddr *laddr, *nladdr;
3081         struct inpcb *ip_pcb;
3082         struct socket *so;
3083
3084         struct sctp_queued_to_read *sq;
3085
3086
3087         int cnt;
3088         sctp_sharedkey_t *shared_key;
3089
3090
3091 #ifdef SCTP_LOG_CLOSING
3092         sctp_log_closing(inp, NULL, 0);
3093 #endif
3094         SCTP_ITERATOR_LOCK();
3095         so = inp->sctp_socket;
3096         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3097                 /* been here before.. eeks.. get out of here */
3098                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3099                 SCTP_ITERATOR_UNLOCK();
3100 #ifdef SCTP_LOG_CLOSING
3101                 sctp_log_closing(inp, NULL, 1);
3102 #endif
3103                 return;
3104         }
3105         SCTP_ASOC_CREATE_LOCK(inp);
3106         SCTP_INP_INFO_WLOCK();
3107
3108         SCTP_INP_WLOCK(inp);
3109         /* First time through we have the socket lock, after that no more. */
3110         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3111                 /*
3112                  * Once we are in we can remove the flag from = 1 is only
3113                  * passed from the actual closing routines that are called
3114                  * via the sockets layer.
3115                  */
3116                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3117                 /* socket is gone, so no more wakeups allowed */
3118                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3119                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3120                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3121         }
3122         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3123             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3124
3125         if (inp->control) {
3126                 sctp_m_freem(inp->control);
3127                 inp->control = NULL;
3128         }
3129         if (inp->pkt) {
3130                 sctp_m_freem(inp->pkt);
3131                 inp->pkt = NULL;
3132         }
3133         m = &inp->sctp_ep;
3134         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3135                                          * here but I will be nice :> (i.e.
3136                                          * ip_pcb = ep;) */
3137         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3138                 int cnt_in_sd;
3139
3140                 cnt_in_sd = 0;
3141                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3142                     asoc = nasoc) {
3143                         SCTP_TCB_LOCK(asoc);
3144                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
3145                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3146                                 /* Skip guys being freed */
3147                                 /* asoc->sctp_socket = NULL; FIXME MT */
3148                                 cnt_in_sd++;
3149                                 SCTP_TCB_UNLOCK(asoc);
3150                                 continue;
3151                         }
3152                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3153                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
3154                                 /*
3155                                  * If we have data in queue, we don't want
3156                                  * to just free since the app may have done,
3157                                  * send()/close or connect/send/close. And
3158                                  * it wants the data to get across first.
3159                                  */
3160                                 /* Just abandon things in the front states */
3161                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3162                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3163                                         cnt_in_sd++;
3164                                 }
3165                                 continue;
3166                         }
3167                         /* Disconnect the socket please */
3168                         asoc->sctp_socket = NULL;
3169                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3170                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3171                             (asoc->asoc.control_pdapi) ||
3172                             (asoc->asoc.size_on_all_streams > 0) ||
3173                             (so && (so->so_rcv.sb_cc > 0))
3174                             ) {
3175                                 /* Left with Data unread */
3176                                 struct mbuf *op_err;
3177
3178                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3179                                     0, M_DONTWAIT, 1, MT_DATA);
3180                                 if (op_err) {
3181                                         /* Fill in the user initiated abort */
3182                                         struct sctp_paramhdr *ph;
3183                                         uint32_t *ippp;
3184
3185                                         SCTP_BUF_LEN(op_err) =
3186                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3187                                         ph = mtod(op_err,
3188                                             struct sctp_paramhdr *);
3189                                         ph->param_type = htons(
3190                                             SCTP_CAUSE_USER_INITIATED_ABT);
3191                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3192                                         ippp = (uint32_t *) (ph + 1);
3193                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3194                                 }
3195                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3196 #if defined(SCTP_PANIC_ON_ABORT)
3197                                 panic("inpcb_free does an abort");
3198 #endif
3199                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3200                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3201                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3202                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3203                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3204                                 }
3205                                 if (sctp_free_assoc(inp, asoc,
3206                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3207                                         cnt_in_sd++;
3208                                 }
3209                                 continue;
3210                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3211                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3212                                     (asoc->asoc.stream_queue_cnt == 0)
3213                             ) {
3214                                 if (asoc->asoc.locked_on_sending) {
3215                                         goto abort_anyway;
3216                                 }
3217                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3218                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3219                                         /*
3220                                          * there is nothing queued to send,
3221                                          * so I send shutdown
3222                                          */
3223                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3224                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3225                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3226                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3227                                         }
3228                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3229                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3230                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3231                                             asoc->asoc.primary_destination);
3232                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3233                                             asoc->asoc.primary_destination);
3234                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3235                                 }
3236                         } else {
3237                                 /* mark into shutdown pending */
3238                                 struct sctp_stream_queue_pending *sp;
3239
3240                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3241                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3242                                     asoc->asoc.primary_destination);
3243                                 if (asoc->asoc.locked_on_sending) {
3244                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3245                                             sctp_streamhead);
3246                                         if (sp == NULL) {
3247                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3248                                                     asoc->asoc.locked_on_sending,
3249                                                     asoc->asoc.locked_on_sending->stream_no);
3250                                         } else {
3251                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3252                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3253                                         }
3254                                 }
3255                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3256                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3257                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3258                                         struct mbuf *op_err;
3259
3260                         abort_anyway:
3261                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3262                                             0, M_DONTWAIT, 1, MT_DATA);
3263                                         if (op_err) {
3264                                                 /*
3265                                                  * Fill in the user
3266                                                  * initiated abort
3267                                                  */
3268                                                 struct sctp_paramhdr *ph;
3269                                                 uint32_t *ippp;
3270
3271                                                 SCTP_BUF_LEN(op_err) =
3272                                                     (sizeof(struct sctp_paramhdr) +
3273                                                     sizeof(uint32_t));
3274                                                 ph = mtod(op_err,
3275                                                     struct sctp_paramhdr *);
3276                                                 ph->param_type = htons(
3277                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3278                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3279                                                 ippp = (uint32_t *) (ph + 1);
3280                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3281                                         }
3282                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3283 #if defined(SCTP_PANIC_ON_ABORT)
3284                                         panic("inpcb_free does an abort");
3285 #endif
3286
3287                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3288                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3289                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3290                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3291                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3292                                         }
3293                                         if (sctp_free_assoc(inp, asoc,
3294                                             SCTP_PCBFREE_NOFORCE,
3295                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3296                                                 cnt_in_sd++;
3297                                         }
3298                                         continue;
3299                                 } else {
3300                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3301                                 }
3302                         }
3303                         cnt_in_sd++;
3304                         SCTP_TCB_UNLOCK(asoc);
3305                 }
3306                 /* now is there some left in our SHUTDOWN state? */
3307                 if (cnt_in_sd) {
3308                         SCTP_INP_WUNLOCK(inp);
3309                         SCTP_ASOC_CREATE_UNLOCK(inp);
3310                         SCTP_INP_INFO_WUNLOCK();
3311                         SCTP_ITERATOR_UNLOCK();
3312 #ifdef SCTP_LOG_CLOSING
3313                         sctp_log_closing(inp, NULL, 2);
3314 #endif
3315                         inp->sctp_socket = NULL;
3316                         return;
3317                 }
3318         }
3319         inp->sctp_socket = NULL;
3320         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3321             SCTP_PCB_FLAGS_UNBOUND) {
3322                 /*
3323                  * ok, this guy has been bound. It's port is somewhere in
3324                  * the SCTP_BASE_INFO(hash table). Remove it!
3325                  */
3326                 LIST_REMOVE(inp, sctp_hash);
3327                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3328         }
3329         /*
3330          * If there is a timer running to kill us, forget it, since it may
3331          * have a contest on the INP lock.. which would cause us to die ...
3332          */
3333         cnt = 0;
3334         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3335             asoc = nasoc) {
3336                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3337                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3338                         cnt++;
3339                         continue;
3340                 }
3341                 /* Free associations that are NOT killing us */
3342                 SCTP_TCB_LOCK(asoc);
3343                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3344                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3345                         struct mbuf *op_err;
3346                         uint32_t *ippp;
3347
3348                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3349                             0, M_DONTWAIT, 1, MT_DATA);
3350                         if (op_err) {
3351                                 /* Fill in the user initiated abort */
3352                                 struct sctp_paramhdr *ph;
3353
3354                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3355                                     sizeof(uint32_t));
3356                                 ph = mtod(op_err, struct sctp_paramhdr *);
3357                                 ph->param_type = htons(
3358                                     SCTP_CAUSE_USER_INITIATED_ABT);
3359                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3360                                 ippp = (uint32_t *) (ph + 1);
3361                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3362
3363                         }
3364                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3365 #if defined(SCTP_PANIC_ON_ABORT)
3366                         panic("inpcb_free does an abort");
3367 #endif
3368                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3369                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3370                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3371                         cnt++;
3372                         SCTP_TCB_UNLOCK(asoc);
3373                         continue;
3374                 }
3375                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3376                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3377                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3378                 }
3379                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3380                         cnt++;
3381                 }
3382         }
3383         if (cnt) {
3384                 /* Ok we have someone out there that will kill us */
3385                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3386                 SCTP_INP_WUNLOCK(inp);
3387                 SCTP_ASOC_CREATE_UNLOCK(inp);
3388                 SCTP_INP_INFO_WUNLOCK();
3389                 SCTP_ITERATOR_UNLOCK();
3390 #ifdef SCTP_LOG_CLOSING
3391                 sctp_log_closing(inp, NULL, 3);
3392 #endif
3393                 return;
3394         }
3395         if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3396                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3397                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3398                 SCTP_INP_WUNLOCK(inp);
3399                 SCTP_ASOC_CREATE_UNLOCK(inp);
3400                 SCTP_INP_INFO_WUNLOCK();
3401                 SCTP_ITERATOR_UNLOCK();
3402 #ifdef SCTP_LOG_CLOSING
3403                 sctp_log_closing(inp, NULL, 4);
3404 #endif
3405                 return;
3406         }
3407         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3408         inp->sctp_ep.signature_change.type = 0;
3409         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3410
3411 #ifdef SCTP_LOG_CLOSING
3412         sctp_log_closing(inp, NULL, 5);
3413 #endif
3414
3415         (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3416         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
3417         /* Clear the read queue */
3418         if ((inp->sctp_asocidhash) != NULL) {
3419                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3420                 inp->sctp_asocidhash = NULL;
3421         }
3422         /* sa_ignore FREED_MEMORY */
3423         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3424                 /* Its only abandoned if it had data left */
3425                 if (sq->length)
3426                         SCTP_STAT_INCR(sctps_left_abandon);
3427
3428                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3429                 sctp_free_remote_addr(sq->whoFrom);
3430                 if (so)
3431                         so->so_rcv.sb_cc -= sq->length;
3432                 if (sq->data) {
3433                         sctp_m_freem(sq->data);
3434                         sq->data = NULL;
3435                 }
3436                 /*
3437                  * no need to free the net count, since at this point all
3438                  * assoc's are gone.
3439                  */
3440                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3441                 SCTP_DECR_READQ_COUNT();
3442         }
3443         /* Now the sctp_pcb things */
3444         /*
3445          * free each asoc if it is not already closed/free. we can't use the
3446          * macro here since le_next will get freed as part of the
3447          * sctp_free_assoc() call.
3448          */
3449         cnt = 0;
3450         if (so) {
3451 #ifdef IPSEC
3452                 ipsec_delete_pcbpolicy(ip_pcb);
3453 #endif                          /* IPSEC */
3454
3455                 /* Unlocks not needed since the socket is gone now */
3456         }
3457         if (ip_pcb->inp_options) {
3458                 (void)sctp_m_free(ip_pcb->inp_options);
3459                 ip_pcb->inp_options = 0;
3460         }
3461         if (ip_pcb->inp_moptions) {
3462                 inp_freemoptions(ip_pcb->inp_moptions);
3463                 ip_pcb->inp_moptions = 0;
3464         }
3465 #ifdef INET6
3466         if (ip_pcb->inp_vflag & INP_IPV6) {
3467                 struct in6pcb *in6p;
3468
3469                 in6p = (struct in6pcb *)inp;
3470                 ip6_freepcbopts(in6p->in6p_outputopts);
3471         }
3472 #endif                          /* INET6 */
3473         ip_pcb->inp_vflag = 0;
3474         /* free up authentication fields */
3475         if (inp->sctp_ep.local_auth_chunks != NULL)
3476                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3477         if (inp->sctp_ep.local_hmacs != NULL)
3478                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3479
3480         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3481         while (shared_key) {
3482                 LIST_REMOVE(shared_key, next);
3483                 sctp_free_sharedkey(shared_key);
3484                 /* sa_ignore FREED_MEMORY */
3485                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3486         }
3487
3488         inp_save = LIST_NEXT(inp, sctp_list);
3489         LIST_REMOVE(inp, sctp_list);
3490
3491         /* fix any iterators only after out of the list */
3492         sctp_iterator_inp_being_freed(inp, inp_save);
3493         /*
3494          * if we have an address list the following will free the list of
3495          * ifaddr's that are set into this ep. Again macro limitations here,
3496          * since the LIST_FOREACH could be a bad idea.
3497          */
3498         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3499             laddr = nladdr) {
3500                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3501                 sctp_remove_laddr(laddr);
3502         }
3503
3504 #ifdef SCTP_TRACK_FREED_ASOCS
3505         /* TEMP CODE */
3506         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3507             asoc = nasoc) {
3508                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3509                 LIST_REMOVE(asoc, sctp_tcblist);
3510                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3511                 SCTP_DECR_ASOC_COUNT();
3512         }
3513         /* *** END TEMP CODE *** */
3514 #endif
3515         /* Now lets see about freeing the EP hash table. */
3516         if (inp->sctp_tcbhash != NULL) {
3517                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3518                 inp->sctp_tcbhash = NULL;
3519         }
3520         /* Now we must put the ep memory back into the zone pool */
3521         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3522         SCTP_INP_LOCK_DESTROY(inp);
3523         SCTP_INP_READ_DESTROY(inp);
3524         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3525         SCTP_INP_INFO_WUNLOCK();
3526         SCTP_ITERATOR_UNLOCK();
3527         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3528         SCTP_DECR_EP_COUNT();
3529 }
3530
3531
3532 struct sctp_nets *
3533 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3534 {
3535         struct sctp_nets *net;
3536
3537         /* locate the address */
3538         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3539                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3540                         return (net);
3541         }
3542         return (NULL);
3543 }
3544
3545
3546 int
3547 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3548 {
3549         struct sctp_ifa *sctp_ifa;
3550
3551         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3552         if (sctp_ifa) {
3553                 return (1);
3554         } else {
3555                 return (0);
3556         }
3557 }
3558
3559 /*
3560  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3561  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3562  * stats of stuff.
3563  */
3564 int
3565 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3566     int set_scope, int from)
3567 {
3568         /*
3569          * The following is redundant to the same lines in the
3570          * sctp_aloc_assoc() but is needed since other's call the add
3571          * address function
3572          */
3573         struct sctp_nets *net, *netfirst;
3574         int addr_inscope;
3575
3576         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3577             from);
3578         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3579
3580         netfirst = sctp_findnet(stcb, newaddr);
3581         if (netfirst) {
3582                 /*
3583                  * Lie and return ok, we don't want to make the association
3584                  * go away for this behavior. It will happen in the TCP
3585                  * model in a connected socket. It does not reach the hash
3586                  * table until after the association is built so it can't be
3587                  * found. Mark as reachable, since the initial creation will
3588                  * have been cleared and the NOT_IN_ASSOC flag will have
3589                  * been added... and we don't want to end up removing it
3590                  * back out.
3591                  */
3592                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3593                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3594                             SCTP_ADDR_UNCONFIRMED);
3595                 } else {
3596                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3597                 }
3598
3599                 return (0);
3600         }
3601         addr_inscope = 1;
3602         if (newaddr->sa_family == AF_INET) {
3603                 struct sockaddr_in *sin;
3604
3605                 sin = (struct sockaddr_in *)newaddr;
3606                 if (sin->sin_addr.s_addr == 0) {
3607                         /* Invalid address */
3608                         return (-1);
3609                 }
3610                 /* zero out the bzero area */
3611                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3612
3613                 /* assure len is set */
3614                 sin->sin_len = sizeof(struct sockaddr_in);
3615                 if (set_scope) {
3616 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3617                         stcb->ipv4_local_scope = 1;
3618 #else
3619                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3620                                 stcb->asoc.ipv4_local_scope = 1;
3621                         }
3622 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3623                 } else {
3624                         /* Validate the address is in scope */
3625                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3626                             (stcb->asoc.ipv4_local_scope == 0)) {
3627                                 addr_inscope = 0;
3628                         }
3629                 }
3630 #ifdef INET6
3631         } else if (newaddr->sa_family == AF_INET6) {
3632                 struct sockaddr_in6 *sin6;
3633
3634                 sin6 = (struct sockaddr_in6 *)newaddr;
3635                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3636                         /* Invalid address */
3637                         return (-1);
3638                 }
3639                 /* assure len is set */
3640                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3641                 if (set_scope) {
3642                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3643                                 stcb->asoc.loopback_scope = 1;
3644                                 stcb->asoc.local_scope = 0;
3645                                 stcb->asoc.ipv4_local_scope = 1;
3646                                 stcb->asoc.site_scope = 1;
3647                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3648                                 /*
3649                                  * If the new destination is a LINK_LOCAL we
3650                                  * must have common site scope. Don't set
3651                                  * the local scope since we may not share
3652                                  * all links, only loopback can do this.
3653                                  * Links on the local network would also be
3654                                  * on our private network for v4 too.
3655                                  */
3656                                 stcb->asoc.ipv4_local_scope = 1;
3657                                 stcb->asoc.site_scope = 1;
3658                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3659                                 /*
3660                                  * If the new destination is SITE_LOCAL then
3661                                  * we must have site scope in common.
3662                                  */
3663                                 stcb->asoc.site_scope = 1;
3664                         }
3665                 } else {
3666                         /* Validate the address is in scope */
3667                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3668                             (stcb->asoc.loopback_scope == 0)) {
3669                                 addr_inscope = 0;
3670                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3671                             (stcb->asoc.local_scope == 0)) {
3672                                 addr_inscope = 0;
3673                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3674                             (stcb->asoc.site_scope == 0)) {
3675                                 addr_inscope = 0;
3676                         }
3677                 }
3678 #endif
3679         } else {
3680                 /* not supported family type */
3681                 return (-1);
3682         }
3683         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3684         if (net == NULL) {
3685                 return (-1);
3686         }
3687         SCTP_INCR_RADDR_COUNT();
3688         bzero(net, sizeof(*net));
3689         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3690         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3691         if (newaddr->sa_family == AF_INET) {
3692                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3693         } else if (newaddr->sa_family == AF_INET6) {
3694                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3695         }
3696         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3697         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3698                 stcb->asoc.loopback_scope = 1;
3699                 stcb->asoc.ipv4_local_scope = 1;
3700                 stcb->asoc.local_scope = 0;
3701                 stcb->asoc.site_scope = 1;
3702                 addr_inscope = 1;
3703         }
3704         net->failure_threshold = stcb->asoc.def_net_failure;
3705         if (addr_inscope == 0) {
3706                 net->dest_state = (SCTP_ADDR_REACHABLE |
3707                     SCTP_ADDR_OUT_OF_SCOPE);
3708         } else {
3709                 if (from == SCTP_ADDR_IS_CONFIRMED)
3710                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3711                         net->dest_state = SCTP_ADDR_REACHABLE;
3712                 else
3713                         net->dest_state = SCTP_ADDR_REACHABLE |
3714                             SCTP_ADDR_UNCONFIRMED;
3715         }
3716         /*
3717          * We set this to 0, the timer code knows that this means its an
3718          * initial value
3719          */
3720         net->RTO = 0;
3721         net->RTO_measured = 0;
3722         stcb->asoc.numnets++;
3723         *(&net->ref_count) = 1;
3724         net->tos_flowlabel = 0;
3725         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3726                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3727         } else {
3728                 net->port = 0;
3729         }
3730 #ifdef INET
3731         if (newaddr->sa_family == AF_INET)
3732                 net->tos_flowlabel = stcb->asoc.default_tos;
3733 #endif
3734 #ifdef INET6
3735         if (newaddr->sa_family == AF_INET6)
3736                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3737 #endif
3738         /* Init the timer structure */
3739         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3740         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3741         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3742
3743         /* Now generate a route for this guy */
3744 #ifdef INET6
3745         /* KAME hack: embed scopeid */
3746         if (newaddr->sa_family == AF_INET6) {
3747                 struct sockaddr_in6 *sin6;
3748
3749                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3750                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone));
3751                 sin6->sin6_scope_id = 0;
3752         }
3753 #endif
3754         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3755
3756         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3757                 /* Get source address */
3758                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3759                     stcb,
3760                     (sctp_route_t *) & net->ro,
3761                     net,
3762                     0,
3763                     stcb->asoc.vrf_id);
3764                 /* Now get the interface MTU */
3765                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3766                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3767                 } else {
3768                         net->mtu = 0;
3769                 }
3770 #ifdef SCTP_PRINT_FOR_B_AND_M
3771                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3772 #endif
3773                 if (net->mtu == 0) {
3774                         /* Huh ?? */
3775                         net->mtu = SCTP_DEFAULT_MTU;
3776                 } else {
3777                         uint32_t rmtu;
3778
3779                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3780 #ifdef SCTP_PRINT_FOR_B_AND_M
3781                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3782 #endif
3783                         if (rmtu == 0) {
3784                                 /*
3785                                  * Start things off to match mtu of
3786                                  * interface please.
3787                                  */
3788                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3789                                     net->ro.ro_rt, net->mtu);
3790                         } else {
3791                                 /*
3792                                  * we take the route mtu over the interface,
3793                                  * since the route may be leading out the
3794                                  * loopback, or a different interface.
3795                                  */
3796                                 net->mtu = rmtu;
3797                         }
3798                 }
3799                 if (from == SCTP_ALLOC_ASOC) {
3800 #ifdef SCTP_PRINT_FOR_B_AND_M
3801                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3802 #endif
3803                         stcb->asoc.smallest_mtu = net->mtu;
3804                 }
3805         } else {
3806                 net->mtu = stcb->asoc.smallest_mtu;
3807         }
3808 #ifdef INET6
3809         if (newaddr->sa_family == AF_INET6) {
3810                 struct sockaddr_in6 *sin6;
3811
3812                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3813                 (void)sa6_recoverscope(sin6);
3814         }
3815 #endif
3816         if (net->port) {
3817                 net->mtu -= sizeof(struct udphdr);
3818         }
3819         if (stcb->asoc.smallest_mtu > net->mtu) {
3820 #ifdef SCTP_PRINT_FOR_B_AND_M
3821                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3822                     net->mtu, stcb->asoc.smallest_mtu);
3823 #endif
3824                 stcb->asoc.smallest_mtu = net->mtu;
3825         }
3826         /* JRS - Use the congestion control given in the CC module */
3827         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3828
3829         /*
3830          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3831          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3832          */
3833         net->find_pseudo_cumack = 1;
3834         net->find_rtx_pseudo_cumack = 1;
3835         net->src_addr_selected = 0;
3836         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3837         if (net->ro.ro_rt == NULL) {
3838                 /* Since we have no route put it at the back */
3839                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3840         } else if (netfirst == NULL) {
3841                 /* We are the first one in the pool. */
3842                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3843         } else if (netfirst->ro.ro_rt == NULL) {
3844                 /*
3845                  * First one has NO route. Place this one ahead of the first
3846                  * one.
3847                  */
3848                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3849         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3850                 /*
3851                  * This one has a different interface than the one at the
3852                  * top of the list. Place it ahead.
3853                  */
3854                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3855         } else {
3856                 /*
3857                  * Ok we have the same interface as the first one. Move
3858                  * forward until we find either a) one with a NULL route...
3859                  * insert ahead of that b) one with a different ifp.. insert
3860                  * after that. c) end of the list.. insert at the tail.
3861                  */
3862                 struct sctp_nets *netlook;
3863
3864                 do {
3865                         netlook = TAILQ_NEXT(netfirst, sctp_next);
3866                         if (netlook == NULL) {
3867                                 /* End of the list */
3868                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3869                                 break;
3870                         } else if (netlook->ro.ro_rt == NULL) {
3871                                 /* next one has NO route */
3872                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
3873                                 break;
3874                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
3875                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
3876                                     net, sctp_next);
3877                                 break;
3878                         }
3879                         /* Shift forward */
3880                         netfirst = netlook;
3881                 } while (netlook != NULL);
3882         }
3883
3884         /* got to have a primary set */
3885         if (stcb->asoc.primary_destination == 0) {
3886                 stcb->asoc.primary_destination = net;
3887         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
3888                     (net->ro.ro_rt) &&
3889             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
3890                 /* No route to current primary adopt new primary */
3891                 stcb->asoc.primary_destination = net;
3892         }
3893         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
3894             net);
3895         /* Validate primary is first */
3896         net = TAILQ_FIRST(&stcb->asoc.nets);
3897         if ((net != stcb->asoc.primary_destination) &&
3898             (stcb->asoc.primary_destination)) {
3899                 /*
3900                  * first one on the list is NOT the primary sctp_cmpaddr()
3901                  * is much more efficent if the primary is the first on the
3902                  * list, make it so.
3903                  */
3904                 TAILQ_REMOVE(&stcb->asoc.nets,
3905                     stcb->asoc.primary_destination, sctp_next);
3906                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
3907                     stcb->asoc.primary_destination, sctp_next);
3908         }
3909         return (0);
3910 }
3911
3912
3913 static uint32_t
3914 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
3915 {
3916         uint32_t id;
3917         struct sctpasochead *head;
3918         struct sctp_tcb *lstcb;
3919
3920 try_again:
3921         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3922                 /* TSNH */
3923                 return (0);
3924         }
3925         SCTP_INP_WLOCK(inp);
3926         id = inp->sctp_associd_counter;
3927         inp->sctp_associd_counter++;
3928         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
3929         if (lstcb) {
3930                 goto try_again;
3931         }
3932         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
3933         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
3934         stcb->asoc.in_asocid_hash = 1;
3935         SCTP_INP_WUNLOCK(inp);
3936         return id;
3937 }
3938
3939 /*
3940  * allocate an association and add it to the endpoint. The caller must be
3941  * careful to add all additional addresses once they are know right away or
3942  * else the assoc will be may experience a blackout scenario.
3943  */
3944 struct sctp_tcb *
3945 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
3946     int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
3947     struct thread *p
3948 )
3949 {
3950         /* note the p argument is only valid in unbound sockets */
3951
3952         struct sctp_tcb *stcb;
3953         struct sctp_association *asoc;
3954         struct sctpasochead *head;
3955         uint16_t rport;
3956         int err;
3957
3958         /*
3959          * Assumption made here: Caller has done a
3960          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
3961          * address does not exist already.
3962          */
3963         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
3964                 /* Hit max assoc, sorry no more */
3965                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
3966                 *error = ENOBUFS;
3967                 return (NULL);
3968         }
3969         if (firstaddr == NULL) {
3970                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3971                 *error = EINVAL;
3972                 return (NULL);
3973         }
3974         SCTP_INP_RLOCK(inp);
3975         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
3976             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
3977             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
3978                 /*
3979                  * If its in the TCP pool, its NOT allowed to create an
3980                  * association. The parent listener needs to call
3981                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
3982                  * off, or connected one does this.. its an error.
3983                  */
3984                 SCTP_INP_RUNLOCK(inp);
3985                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3986                 *error = EINVAL;
3987                 return (NULL);
3988         }
3989         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
3990 #ifdef SCTP_DEBUG
3991         if (firstaddr) {
3992                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
3993                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
3994                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
3995         } else {
3996                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
3997         }
3998 #endif                          /* SCTP_DEBUG */
3999         if (firstaddr->sa_family == AF_INET) {
4000                 struct sockaddr_in *sin;
4001
4002                 sin = (struct sockaddr_in *)firstaddr;
4003                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4004                         /* Invalid address */
4005                         SCTP_INP_RUNLOCK(inp);
4006                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4007                         *error = EINVAL;
4008                         return (NULL);
4009                 }
4010                 rport = sin->sin_port;
4011         } else if (firstaddr->sa_family == AF_INET6) {
4012                 struct sockaddr_in6 *sin6;
4013
4014                 sin6 = (struct sockaddr_in6 *)firstaddr;
4015                 if ((sin6->sin6_port == 0) ||
4016                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4017                         /* Invalid address */
4018                         SCTP_INP_RUNLOCK(inp);
4019                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4020                         *error = EINVAL;
4021                         return (NULL);
4022                 }
4023                 rport = sin6->sin6_port;
4024         } else {
4025                 /* not supported family type */
4026                 SCTP_INP_RUNLOCK(inp);
4027                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4028                 *error = EINVAL;
4029                 return (NULL);
4030         }
4031         SCTP_INP_RUNLOCK(inp);
4032         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4033                 /*
4034                  * If you have not performed a bind, then we need to do the
4035                  * ephemerial bind for you.
4036                  */
4037                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4038                     (struct sockaddr *)NULL,
4039                     (struct sctp_ifa *)NULL,
4040                     p
4041                     ))) {
4042                         /* bind error, probably perm */
4043                         *error = err;
4044                         return (NULL);
4045                 }
4046         }
4047         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4048         if (stcb == NULL) {
4049                 /* out of memory? */
4050                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4051                 *error = ENOMEM;
4052                 return (NULL);
4053         }
4054         SCTP_INCR_ASOC_COUNT();
4055
4056         bzero(stcb, sizeof(*stcb));
4057         asoc = &stcb->asoc;
4058
4059         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4060         SCTP_TCB_LOCK_INIT(stcb);
4061         SCTP_TCB_SEND_LOCK_INIT(stcb);
4062         stcb->rport = rport;
4063         /* setup back pointer's */
4064         stcb->sctp_ep = inp;
4065         stcb->sctp_socket = inp->sctp_socket;
4066         if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
4067                 /* failed */
4068                 SCTP_TCB_LOCK_DESTROY(stcb);
4069                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4070                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4071                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4072                 SCTP_DECR_ASOC_COUNT();
4073                 *error = err;
4074                 return (NULL);
4075         }
4076         /* and the port */
4077         SCTP_INP_INFO_WLOCK();
4078         SCTP_INP_WLOCK(inp);
4079         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4080                 /* inpcb freed while alloc going on */
4081                 SCTP_TCB_LOCK_DESTROY(stcb);
4082                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4083                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4084                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4085                 SCTP_INP_WUNLOCK(inp);
4086                 SCTP_INP_INFO_WUNLOCK();
4087                 SCTP_DECR_ASOC_COUNT();
4088                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4089                 *error = EINVAL;
4090                 return (NULL);
4091         }
4092         SCTP_TCB_LOCK(stcb);
4093
4094         /* now that my_vtag is set, add it to the hash */
4095         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4096         /* put it in the bucket in the vtag hash of assoc's for the system */
4097         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4098 #ifdef MICHAELS_EXPERIMENT
4099         sctp_delete_from_timewait(stcb->asoc.my_vtag, inp->sctp_lport, stcb->rport);
4100 #endif
4101         SCTP_INP_INFO_WUNLOCK();
4102
4103         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4104                 /* failure.. memory error? */
4105                 if (asoc->strmout) {
4106                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4107                         asoc->strmout = NULL;
4108                 }
4109                 if (asoc->mapping_array) {
4110                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4111                         asoc->mapping_array = NULL;
4112                 }
4113                 SCTP_DECR_ASOC_COUNT();
4114                 SCTP_TCB_LOCK_DESTROY(stcb);
4115                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4116                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4117                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4118                 SCTP_INP_WUNLOCK(inp);
4119                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4120                 *error = ENOBUFS;
4121                 return (NULL);
4122         }
4123         /* Init all the timers */
4124         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4125         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4126         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4127         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4128         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4129         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4130         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4131         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4132
4133         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4134         /* now file the port under the hash as well */
4135         if (inp->sctp_tcbhash != NULL) {
4136                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4137                     inp->sctp_hashmark)];
4138                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4139         }
4140         SCTP_INP_WUNLOCK(inp);
4141         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4142         return (stcb);
4143 }
4144
4145
4146 void
4147 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4148 {
4149         struct sctp_association *asoc;
4150
4151         asoc = &stcb->asoc;
4152         asoc->numnets--;
4153         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4154         if (net == asoc->primary_destination) {
4155                 /* Reset primary */
4156                 struct sctp_nets *lnet;
4157
4158                 lnet = TAILQ_FIRST(&asoc->nets);
4159                 /*
4160                  * Mobility adaptation Ideally, if deleted destination is
4161                  * the primary, it becomes a fast retransmission trigger by
4162                  * the subsequent SET PRIMARY. (by micchie)
4163                  */
4164                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4165                     SCTP_MOBILITY_BASE) ||
4166                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4167                     SCTP_MOBILITY_FASTHANDOFF)) {
4168                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4169                         if (asoc->deleted_primary != NULL) {
4170                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4171                                 goto out;
4172                         }
4173                         asoc->deleted_primary = net;
4174                         atomic_add_int(&net->ref_count, 1);
4175                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4176                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4177                         sctp_mobility_feature_on(stcb->sctp_ep,
4178                             SCTP_MOBILITY_PRIM_DELETED);
4179                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4180                             stcb->sctp_ep, stcb, NULL);
4181                 }
4182 out:
4183                 /* Try to find a confirmed primary */
4184                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4185         }
4186         if (net == asoc->last_data_chunk_from) {
4187                 /* Reset primary */
4188                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4189         }
4190         if (net == asoc->last_control_chunk_from) {
4191                 /* Clear net */
4192                 asoc->last_control_chunk_from = NULL;
4193         }
4194         sctp_free_remote_addr(net);
4195 }
4196
4197 /*
4198  * remove a remote endpoint address from an association, it will fail if the
4199  * address does not exist.
4200  */
4201 int
4202 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4203 {
4204         /*
4205          * Here we need to remove a remote address. This is quite simple, we
4206          * first find it in the list of address for the association
4207          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4208          * on that item. Note we do not allow it to be removed if there are
4209          * no other addresses.
4210          */
4211         struct sctp_association *asoc;
4212         struct sctp_nets *net, *net_tmp;
4213
4214         asoc = &stcb->asoc;
4215
4216         /* locate the address */
4217         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4218                 net_tmp = TAILQ_NEXT(net, sctp_next);
4219                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4220                         continue;
4221                 }
4222                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4223                     remaddr)) {
4224                         /* we found the guy */
4225                         if (asoc->numnets < 2) {
4226                                 /* Must have at LEAST two remote addresses */
4227                                 return (-1);
4228                         } else {
4229                                 sctp_remove_net(stcb, net);
4230                                 return (0);
4231                         }
4232                 }
4233         }
4234         /* not found. */
4235         return (-2);
4236 }
4237
4238 void
4239 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4240 {
4241         struct sctpvtaghead *chain;
4242         struct sctp_tagblock *twait_block;
4243         int found = 0;
4244         int i;
4245
4246         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4247         if (!SCTP_LIST_EMPTY(chain)) {
4248                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4249                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4250                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4251                                     (twait_block->vtag_block[i].lport == lport) &&
4252                                     (twait_block->vtag_block[i].rport == rport)) {
4253                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4254                                         twait_block->vtag_block[i].v_tag = 0;
4255                                         twait_block->vtag_block[i].lport = 0;
4256                                         twait_block->vtag_block[i].rport = 0;
4257                                         found = 1;
4258                                         break;
4259                                 }
4260                         }
4261                         if (found)
4262                                 break;
4263                 }
4264         }
4265 }
4266
4267 int
4268 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4269 {
4270         struct sctpvtaghead *chain;
4271         struct sctp_tagblock *twait_block;
4272         int found = 0;
4273         int i;
4274
4275         SCTP_INP_INFO_WLOCK();
4276         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4277         if (!SCTP_LIST_EMPTY(chain)) {
4278                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4279                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4280                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4281                                     (twait_block->vtag_block[i].lport == lport) &&
4282                                     (twait_block->vtag_block[i].rport == rport)) {
4283                                         found = 1;
4284                                         break;
4285                                 }
4286                         }
4287                         if (found)
4288                                 break;
4289                 }
4290         }
4291         SCTP_INP_INFO_WUNLOCK();
4292         return (found);
4293 }
4294
4295
4296 void
4297 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4298 {
4299         struct sctpvtaghead *chain;
4300         struct sctp_tagblock *twait_block;
4301         struct timeval now;
4302         int set, i;
4303
4304         (void)SCTP_GETTIME_TIMEVAL(&now);
4305         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4306         set = 0;
4307         if (!SCTP_LIST_EMPTY(chain)) {
4308                 /* Block(s) present, lets find space, and expire on the fly */
4309                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4310                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4311                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4312                                     !set) {
4313                                         twait_block->vtag_block[i].tv_sec_at_expire =
4314                                             now.tv_sec + time;
4315                                         twait_block->vtag_block[i].v_tag = tag;
4316                                         twait_block->vtag_block[i].lport = lport;
4317                                         twait_block->vtag_block[i].rport = rport;
4318                                         set = 1;
4319                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4320                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4321                                         /* Audit expires this guy */
4322                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4323                                         twait_block->vtag_block[i].v_tag = 0;
4324                                         twait_block->vtag_block[i].lport = 0;
4325                                         twait_block->vtag_block[i].rport = 0;
4326                                         if (set == 0) {
4327                                                 /* Reuse it for my new tag */
4328                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4329                                                 twait_block->vtag_block[i].v_tag = tag;
4330                                                 twait_block->vtag_block[i].lport = lport;
4331                                                 twait_block->vtag_block[i].rport = rport;
4332                                                 set = 1;
4333                                         }
4334                                 }
4335                         }
4336                         if (set) {
4337                                 /*
4338                                  * We only do up to the block where we can
4339                                  * place our tag for audits
4340                                  */
4341                                 break;
4342                         }
4343                 }
4344         }
4345         /* Need to add a new block to chain */
4346         if (!set) {
4347                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4348                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4349                 if (twait_block == NULL) {
4350 #ifdef INVARIANTS
4351                         panic("Can not alloc tagblock");
4352 #endif
4353                         return;
4354                 }
4355                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4356                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4357                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4358                 twait_block->vtag_block[0].v_tag = tag;
4359                 twait_block->vtag_block[0].lport = lport;
4360                 twait_block->vtag_block[0].rport = rport;
4361         }
4362 }
4363
4364
4365 static void
4366 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4367 {
4368         struct sctp_iterator *it;
4369
4370         /*
4371          * Unlock the tcb lock we do this so we avoid a dead lock scenario
4372          * where the iterator is waiting on the TCB lock and the TCB lock is
4373          * waiting on the iterator lock.
4374          */
4375         it = stcb->asoc.stcb_starting_point_for_iterator;
4376         if (it == NULL) {
4377                 return;
4378         }
4379         if (it->inp != stcb->sctp_ep) {
4380                 /* hmm, focused on the wrong one? */
4381                 return;
4382         }
4383         if (it->stcb != stcb) {
4384                 return;
4385         }
4386         it->stcb = LIST_NEXT(stcb, sctp_tcblist);
4387         if (it->stcb == NULL) {
4388                 /* done with all asoc's in this assoc */
4389                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
4390                         it->inp = NULL;
4391                 } else {
4392                         it->inp = LIST_NEXT(inp, sctp_list);
4393                 }
4394         }
4395 }
4396
4397
4398 /*-
4399  * Free the association after un-hashing the remote port. This
4400  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4401  * expect that the input to this function IS a locked TCB.
4402  * It will return 0, if it did NOT destroy the association (instead
4403  * it unlocks it. It will return NON-zero if it either destroyed the
4404  * association OR the association is already destroyed.
4405  */
4406 int
4407 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4408 {
4409         int i;
4410         struct sctp_association *asoc;
4411         struct sctp_nets *net, *prev;
4412         struct sctp_laddr *laddr;
4413         struct sctp_tmit_chunk *chk;
4414         struct sctp_asconf_addr *aparam;
4415         struct sctp_asconf_ack *aack;
4416         struct sctp_stream_reset_list *liste;
4417         struct sctp_queued_to_read *sq;
4418         struct sctp_stream_queue_pending *sp;
4419         sctp_sharedkey_t *shared_key;
4420         struct socket *so;
4421         int ccnt = 0;
4422         int cnt = 0;
4423
4424         /* first, lets purge the entry from the hash table. */
4425
4426 #ifdef SCTP_LOG_CLOSING
4427         sctp_log_closing(inp, stcb, 6);
4428 #endif
4429         if (stcb->asoc.state == 0) {
4430 #ifdef SCTP_LOG_CLOSING
4431                 sctp_log_closing(inp, NULL, 7);
4432 #endif
4433                 /* there is no asoc, really TSNH :-0 */
4434                 return (1);
4435         }
4436         /* TEMP CODE */
4437         if (stcb->freed_from_where == 0) {
4438                 /* Only record the first place free happened from */
4439                 stcb->freed_from_where = from_location;
4440         }
4441         /* TEMP CODE */
4442
4443         asoc = &stcb->asoc;
4444         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4445             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4446                 /* nothing around */
4447                 so = NULL;
4448         else
4449                 so = inp->sctp_socket;
4450
4451         /*
4452          * We used timer based freeing if a reader or writer is in the way.
4453          * So we first check if we are actually being called from a timer,
4454          * if so we abort early if a reader or writer is still in the way.
4455          */
4456         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4457             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4458                 /*
4459                  * is it the timer driving us? if so are the reader/writers
4460                  * gone?
4461                  */
4462                 if (stcb->asoc.refcnt) {
4463                         /* nope, reader or writer in the way */
4464                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4465                         /* no asoc destroyed */
4466                         SCTP_TCB_UNLOCK(stcb);
4467 #ifdef SCTP_LOG_CLOSING
4468                         sctp_log_closing(inp, stcb, 8);
4469 #endif
4470                         return (0);
4471                 }
4472         }
4473         /* now clean up any other timers */
4474         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4475         asoc->hb_timer.self = NULL;
4476         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4477         asoc->dack_timer.self = NULL;
4478         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4479         /*-
4480          * For stream reset we don't blast this unless
4481          * it is a str-reset timer, it might be the
4482          * free-asoc timer which we DON'T want to
4483          * disturb.
4484          */
4485         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4486                 asoc->strreset_timer.self = NULL;
4487         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4488         asoc->asconf_timer.self = NULL;
4489         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4490         asoc->autoclose_timer.self = NULL;
4491         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4492         asoc->shut_guard_timer.self = NULL;
4493         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4494         asoc->delayed_event_timer.self = NULL;
4495         /* Mobility adaptation */
4496         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4497         asoc->delete_prim_timer.self = NULL;
4498         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4499                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4500                 net->fr_timer.self = NULL;
4501                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4502                 net->rxt_timer.self = NULL;
4503                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4504                 net->pmtu_timer.self = NULL;
4505         }
4506         /* Now the read queue needs to be cleaned up (only once) */
4507         cnt = 0;
4508         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4509                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4510                 SCTP_INP_READ_LOCK(inp);
4511                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4512                         if (sq->stcb == stcb) {
4513                                 sq->do_not_ref_stcb = 1;
4514                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4515                                 /*
4516                                  * If there is no end, there never will be
4517                                  * now.
4518                                  */
4519                                 if (sq->end_added == 0) {
4520                                         /* Held for PD-API clear that. */
4521                                         sq->pdapi_aborted = 1;
4522                                         sq->held_length = 0;
4523                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4524                                                 /*
4525                                                  * Need to add a PD-API
4526                                                  * aborted indication.
4527                                                  * Setting the control_pdapi
4528                                                  * assures that it will be
4529                                                  * added right after this
4530                                                  * msg.
4531                                                  */
4532                                                 uint32_t strseq;
4533
4534                                                 stcb->asoc.control_pdapi = sq;
4535                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4536                                                 sctp_notify_partial_delivery_indication(stcb,
4537                                                     SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
4538                                                 stcb->asoc.control_pdapi = NULL;
4539                                         }
4540                                 }
4541                                 /* Add an end to wake them */
4542                                 sq->end_added = 1;
4543                                 cnt++;
4544                         }
4545                 }
4546                 SCTP_INP_READ_UNLOCK(inp);
4547                 if (stcb->block_entry) {
4548                         cnt++;
4549                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4550                         stcb->block_entry->error = ECONNRESET;
4551                         stcb->block_entry = NULL;
4552                 }
4553         }
4554         if (stcb->asoc.refcnt) {
4555                 /*
4556                  * reader or writer in the way, we have hopefully given him
4557                  * something to chew on above.
4558                  */
4559                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4560                 SCTP_TCB_UNLOCK(stcb);
4561                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4562                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4563                         /* nothing around */
4564                         so = NULL;
4565                 if (so) {
4566                         /* Wake any reader/writers */
4567                         sctp_sorwakeup(inp, so);
4568                         sctp_sowwakeup(inp, so);
4569                 }
4570 #ifdef SCTP_LOG_CLOSING
4571                 sctp_log_closing(inp, stcb, 9);
4572 #endif
4573                 /* no asoc destroyed */
4574                 return (0);
4575         }
4576 #ifdef SCTP_LOG_CLOSING
4577         sctp_log_closing(inp, stcb, 10);
4578 #endif
4579         /*
4580          * When I reach here, no others want to kill the assoc yet.. and I
4581          * own the lock. Now its possible an abort comes in when I do the
4582          * lock exchange below to grab all the locks to do the final take
4583          * out. to prevent this we increment the count, which will start a
4584          * timer and blow out above thus assuring us that we hold exclusive
4585          * killing of the asoc. Note that after getting back the TCB lock we
4586          * will go ahead and increment the counter back up and stop any
4587          * timer a passing stranger may have started :-S
4588          */
4589         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4590                 atomic_add_int(&stcb->asoc.refcnt, 1);
4591
4592                 SCTP_TCB_UNLOCK(stcb);
4593
4594                 SCTP_ITERATOR_LOCK();
4595                 SCTP_INP_INFO_WLOCK();
4596                 SCTP_INP_WLOCK(inp);
4597                 SCTP_TCB_LOCK(stcb);
4598         }
4599         /* Double check the GONE flag */
4600         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4601             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4602                 /* nothing around */
4603                 so = NULL;
4604
4605         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4606             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4607                 /*
4608                  * For TCP type we need special handling when we are
4609                  * connected. We also include the peel'ed off ones to.
4610                  */
4611                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4612                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4613                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4614                         if (so) {
4615                                 SOCK_LOCK(so);
4616                                 if (so->so_rcv.sb_cc == 0) {
4617                                         so->so_state &= ~(SS_ISCONNECTING |
4618                                             SS_ISDISCONNECTING |
4619                                             SS_ISCONFIRMING |
4620                                             SS_ISCONNECTED);
4621                                 }
4622                                 SOCK_UNLOCK(so);
4623                                 socantrcvmore(so);
4624                                 sctp_sowwakeup(inp, so);
4625                                 sctp_sorwakeup(inp, so);
4626                                 SCTP_SOWAKEUP(so);
4627                         }
4628                 }
4629         }
4630         /*
4631          * Make it invalid too, that way if its about to run it will abort
4632          * and return.
4633          */
4634         sctp_iterator_asoc_being_freed(inp, stcb);
4635         /* re-increment the lock */
4636         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4637                 atomic_add_int(&stcb->asoc.refcnt, -1);
4638         }
4639         asoc->state = 0;
4640         if (inp->sctp_tcbhash) {
4641                 LIST_REMOVE(stcb, sctp_tcbhash);
4642         }
4643         if (stcb->asoc.in_asocid_hash) {
4644                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4645         }
4646         /* Now lets remove it from the list of ALL associations in the EP */
4647         LIST_REMOVE(stcb, sctp_tcblist);
4648         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4649                 SCTP_INP_INCR_REF(inp);
4650                 SCTP_INP_WUNLOCK(inp);
4651                 SCTP_ITERATOR_UNLOCK();
4652         }
4653         /* pull from vtag hash */
4654         LIST_REMOVE(stcb, sctp_asocs);
4655         sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport, SCTP_TIME_WAIT);
4656
4657         /*
4658          * Now restop the timers to be sure - this is paranoia at is finest!
4659          */
4660         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4661         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4662         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4663         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4664         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4665         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4666         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4667         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4668         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4669                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4670                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4671                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4672         }
4673
4674         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4675         prev = NULL;
4676         /*
4677          * The chunk lists and such SHOULD be empty but we check them just
4678          * in case.
4679          */
4680         /* anything on the wheel needs to be removed */
4681         for (i = 0; i < asoc->streamoutcnt; i++) {
4682                 struct sctp_stream_out *outs;
4683
4684                 outs = &asoc->strmout[i];
4685                 /* now clean up any chunks here */
4686                 sp = TAILQ_FIRST(&outs->outqueue);
4687                 while (sp) {
4688                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4689                         if (sp->data) {
4690                                 sctp_m_freem(sp->data);
4691                                 sp->data = NULL;
4692                                 sp->tail_mbuf = NULL;
4693                         }
4694                         sctp_free_remote_addr(sp->net);
4695                         sctp_free_spbufspace(stcb, asoc, sp);
4696                         if (sp->holds_key_ref)
4697                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4698                         /* Free the zone stuff  */
4699                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4700                         SCTP_DECR_STRMOQ_COUNT();
4701                         /* sa_ignore FREED_MEMORY */
4702                         sp = TAILQ_FIRST(&outs->outqueue);
4703                 }
4704         }
4705
4706         /* sa_ignore FREED_MEMORY */
4707         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4708                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4709                 SCTP_FREE(liste, SCTP_M_STRESET);
4710         }
4711
4712         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4713         while (sq) {
4714                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4715                 if (sq->data) {
4716                         sctp_m_freem(sq->data);
4717                         sq->data = NULL;
4718                 }
4719                 sctp_free_remote_addr(sq->whoFrom);
4720                 sq->whoFrom = NULL;
4721                 sq->stcb = NULL;
4722                 /* Free the ctl entry */
4723                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4724                 SCTP_DECR_READQ_COUNT();
4725                 /* sa_ignore FREED_MEMORY */
4726                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4727         }
4728
4729         chk = TAILQ_FIRST(&asoc->free_chunks);
4730         while (chk) {
4731                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4732                 if (chk->data) {
4733                         sctp_m_freem(chk->data);
4734                         chk->data = NULL;
4735                 }
4736                 if (chk->holds_key_ref)
4737                         sctp_auth_key_release(stcb, chk->auth_keyid);
4738                 ccnt++;
4739                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4740                 SCTP_DECR_CHK_COUNT();
4741                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4742                 asoc->free_chunk_cnt--;
4743                 /* sa_ignore FREED_MEMORY */
4744                 chk = TAILQ_FIRST(&asoc->free_chunks);
4745         }
4746         /* pending send queue SHOULD be empty */
4747         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4748                 chk = TAILQ_FIRST(&asoc->send_queue);
4749                 while (chk) {
4750                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4751                         if (chk->data) {
4752                                 sctp_m_freem(chk->data);
4753                                 chk->data = NULL;
4754                         }
4755                         if (chk->holds_key_ref)
4756                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4757                         ccnt++;
4758                         sctp_free_remote_addr(chk->whoTo);
4759                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4760                         SCTP_DECR_CHK_COUNT();
4761                         /* sa_ignore FREED_MEMORY */
4762                         chk = TAILQ_FIRST(&asoc->send_queue);
4763                 }
4764         }
4765 /*
4766   if(ccnt) {
4767   printf("Freed %d from send_queue\n", ccnt);
4768   ccnt = 0;
4769   }
4770 */
4771         /* sent queue SHOULD be empty */
4772         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4773                 chk = TAILQ_FIRST(&asoc->sent_queue);
4774                 while (chk) {
4775                         TAILQ_REMOVE(&asoc->sent_queue, 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_free_remote_addr(chk->whoTo);
4784                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4785                         SCTP_DECR_CHK_COUNT();
4786                         /* sa_ignore FREED_MEMORY */
4787                         chk = TAILQ_FIRST(&asoc->sent_queue);
4788                 }
4789         }
4790 /*
4791   if(ccnt) {
4792   printf("Freed %d from sent_queue\n", ccnt);
4793   ccnt = 0;
4794   }
4795 */
4796         /* control queue MAY not be empty */
4797         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4798                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4799                 while (chk) {
4800                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4801                         if (chk->data) {
4802                                 sctp_m_freem(chk->data);
4803                                 chk->data = NULL;
4804                         }
4805                         if (chk->holds_key_ref)
4806                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4807                         ccnt++;
4808                         sctp_free_remote_addr(chk->whoTo);
4809                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4810                         SCTP_DECR_CHK_COUNT();
4811                         /* sa_ignore FREED_MEMORY */
4812                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4813                 }
4814         }
4815 /*
4816   if(ccnt) {
4817   printf("Freed %d from ctrl_queue\n", ccnt);
4818   ccnt = 0;
4819   }
4820 */
4821
4822         /* ASCONF queue MAY not be empty */
4823         if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4824                 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4825                 while (chk) {
4826                         TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4827                         if (chk->data) {
4828                                 sctp_m_freem(chk->data);
4829                                 chk->data = NULL;
4830                         }
4831                         if (chk->holds_key_ref)
4832                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4833                         ccnt++;
4834                         sctp_free_remote_addr(chk->whoTo);
4835                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4836                         SCTP_DECR_CHK_COUNT();
4837                         /* sa_ignore FREED_MEMORY */
4838                         chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4839                 }
4840         }
4841 /*
4842   if(ccnt) {
4843   printf("Freed %d from asconf_queue\n", ccnt);
4844   ccnt = 0;
4845   }
4846 */
4847         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4848                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4849                 while (chk) {
4850                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4851                         if (chk->data) {
4852                                 sctp_m_freem(chk->data);
4853                                 chk->data = NULL;
4854                         }
4855                         if (chk->holds_key_ref)
4856                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4857                         sctp_free_remote_addr(chk->whoTo);
4858                         ccnt++;
4859                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4860                         SCTP_DECR_CHK_COUNT();
4861                         /* sa_ignore FREED_MEMORY */
4862                         chk = TAILQ_FIRST(&asoc->reasmqueue);
4863                 }
4864         }
4865 /*
4866   if(ccnt) {
4867   printf("Freed %d from reasm_queue\n", ccnt);
4868   ccnt = 0;
4869   }
4870 */
4871         if (asoc->mapping_array) {
4872                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4873                 asoc->mapping_array = NULL;
4874         }
4875         /* the stream outs */
4876         if (asoc->strmout) {
4877                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4878                 asoc->strmout = NULL;
4879         }
4880         asoc->streamoutcnt = 0;
4881         if (asoc->strmin) {
4882                 struct sctp_queued_to_read *ctl;
4883
4884                 for (i = 0; i < asoc->streamincnt; i++) {
4885                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
4886                                 /* We have somethings on the streamin queue */
4887                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4888                                 while (ctl) {
4889                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
4890                                             ctl, next);
4891                                         sctp_free_remote_addr(ctl->whoFrom);
4892                                         if (ctl->data) {
4893                                                 sctp_m_freem(ctl->data);
4894                                                 ctl->data = NULL;
4895                                         }
4896                                         /*
4897                                          * We don't free the address here
4898                                          * since all the net's were freed
4899                                          * above.
4900                                          */
4901                                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4902                                         SCTP_DECR_READQ_COUNT();
4903                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
4904                                 }
4905                         }
4906                 }
4907                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4908                 asoc->strmin = NULL;
4909         }
4910         asoc->streamincnt = 0;
4911         while (!TAILQ_EMPTY(&asoc->nets)) {
4912                 /* sa_ignore FREED_MEMORY */
4913                 net = TAILQ_FIRST(&asoc->nets);
4914                 /* pull from list */
4915                 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
4916 #ifdef INVARIANTS
4917                         panic("no net's left alloc'ed, or list points to itself");
4918 #endif
4919                         break;
4920                 }
4921                 prev = net;
4922                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4923                 sctp_free_remote_addr(net);
4924         }
4925
4926         while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
4927                 /* sa_ignore FREED_MEMORY */
4928                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
4929                 sctp_remove_laddr(laddr);
4930         }
4931
4932         /* pending asconf (address) parameters */
4933         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
4934                 /* sa_ignore FREED_MEMORY */
4935                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
4936                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
4937                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
4938         }
4939         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
4940                 /* sa_ignore FREED_MEMORY */
4941                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
4942                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
4943                 if (aack->data != NULL) {
4944                         sctp_m_freem(aack->data);
4945                 }
4946                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
4947         }
4948         /* clean up auth stuff */
4949         if (asoc->local_hmacs)
4950                 sctp_free_hmaclist(asoc->local_hmacs);
4951         if (asoc->peer_hmacs)
4952                 sctp_free_hmaclist(asoc->peer_hmacs);
4953
4954         if (asoc->local_auth_chunks)
4955                 sctp_free_chunklist(asoc->local_auth_chunks);
4956         if (asoc->peer_auth_chunks)
4957                 sctp_free_chunklist(asoc->peer_auth_chunks);
4958
4959         sctp_free_authinfo(&asoc->authinfo);
4960
4961         shared_key = LIST_FIRST(&asoc->shared_keys);
4962         while (shared_key) {
4963                 LIST_REMOVE(shared_key, next);
4964                 sctp_free_sharedkey(shared_key);
4965                 /* sa_ignore FREED_MEMORY */
4966                 shared_key = LIST_FIRST(&asoc->shared_keys);
4967         }
4968
4969         /* Insert new items here :> */
4970
4971         /* Get rid of LOCK */
4972         SCTP_TCB_LOCK_DESTROY(stcb);
4973         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4974         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4975                 SCTP_INP_INFO_WUNLOCK();
4976                 SCTP_INP_RLOCK(inp);
4977         }
4978 #ifdef SCTP_TRACK_FREED_ASOCS
4979         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4980                 /* now clean up the tasoc itself */
4981                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4982                 SCTP_DECR_ASOC_COUNT();
4983         } else {
4984                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
4985         }
4986 #else
4987         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4988         SCTP_DECR_ASOC_COUNT();
4989 #endif
4990         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4991                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
4992                         /*
4993                          * If its NOT the inp_free calling us AND sctp_close
4994                          * as been called, we call back...
4995                          */
4996                         SCTP_INP_RUNLOCK(inp);
4997                         /*
4998                          * This will start the kill timer (if we are the
4999                          * lastone) since we hold an increment yet. But this
5000                          * is the only safe way to do this since otherwise
5001                          * if the socket closes at the same time we are here
5002                          * we might collide in the cleanup.
5003                          */
5004                         sctp_inpcb_free(inp,
5005                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5006                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5007                         SCTP_INP_DECR_REF(inp);
5008                         goto out_of;
5009                 } else {
5010                         /* The socket is still open. */
5011                         SCTP_INP_DECR_REF(inp);
5012                 }
5013         }
5014         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5015                 SCTP_INP_RUNLOCK(inp);
5016         }
5017 out_of:
5018         /* destroyed the asoc */
5019 #ifdef SCTP_LOG_CLOSING
5020         sctp_log_closing(inp, NULL, 11);
5021 #endif
5022         return (1);
5023 }
5024
5025
5026
5027 /*
5028  * determine if a destination is "reachable" based upon the addresses bound
5029  * to the current endpoint (e.g. only v4 or v6 currently bound)
5030  */
5031 /*
5032  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5033  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5034  * types bound as its endpoint
5035  */
5036 int
5037 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5038 {
5039         struct sctp_inpcb *inp;
5040         int answer;
5041
5042         /*
5043          * No locks here, the TCB, in all cases is already locked and an
5044          * assoc is up. There is either a INP lock by the caller applied (in
5045          * asconf case when deleting an address) or NOT in the HB case,
5046          * however if HB then the INP increment is up and the INP will not
5047          * be removed (on top of the fact that we have a TCB lock). So we
5048          * only want to read the sctp_flags, which is either bound-all or
5049          * not.. no protection needed since once an assoc is up you can't be
5050          * changing your binding.
5051          */
5052         inp = stcb->sctp_ep;
5053         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5054                 /* if bound all, destination is not restricted */
5055                 /*
5056                  * RRS: Question during lock work: Is this correct? If you
5057                  * are bound-all you still might need to obey the V4--V6
5058                  * flags??? IMO this bound-all stuff needs to be removed!
5059                  */
5060                 return (1);
5061         }
5062         /* NOTE: all "scope" checks are done when local addresses are added */
5063         if (destaddr->sa_family == AF_INET6) {
5064                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5065         } else if (destaddr->sa_family == AF_INET) {
5066                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5067         } else {
5068                 /* invalid family, so it's unreachable */
5069                 answer = 0;
5070         }
5071         return (answer);
5072 }
5073
5074 /*
5075  * update the inp_vflags on an endpoint
5076  */
5077 static void
5078 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5079 {
5080         struct sctp_laddr *laddr;
5081
5082         /* first clear the flag */
5083         inp->ip_inp.inp.inp_vflag = 0;
5084         /* set the flag based on addresses on the ep list */
5085         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5086                 if (laddr->ifa == NULL) {
5087                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5088                             __FUNCTION__);
5089                         continue;
5090                 }
5091                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5092                         continue;
5093                 }
5094                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5095                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5096                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5097                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5098                 }
5099         }
5100 }
5101
5102 /*
5103  * Add the address to the endpoint local address list There is nothing to be
5104  * done if we are bound to all addresses
5105  */
5106 void
5107 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5108 {
5109         struct sctp_laddr *laddr;
5110         int fnd, error = 0;
5111
5112         fnd = 0;
5113
5114         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5115                 /* You are already bound to all. You have it already */
5116                 return;
5117         }
5118         if (ifa->address.sa.sa_family == AF_INET6) {
5119                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5120                         /* Can't bind a non-useable addr. */
5121                         return;
5122                 }
5123         }
5124         /* first, is it already present? */
5125         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5126                 if (laddr->ifa == ifa) {
5127                         fnd = 1;
5128                         break;
5129                 }
5130         }
5131
5132         if (fnd == 0) {
5133                 /* Not in the ep list */
5134                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5135                 if (error != 0)
5136                         return;
5137                 inp->laddr_count++;
5138                 /* update inp_vflag flags */
5139                 if (ifa->address.sa.sa_family == AF_INET6) {
5140                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5141                 } else if (ifa->address.sa.sa_family == AF_INET) {
5142                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5143                 }
5144         }
5145         return;
5146 }
5147
5148
5149 /*
5150  * select a new (hopefully reachable) destination net (should only be used
5151  * when we deleted an ep addr that is the only usable source address to reach
5152  * the destination net)
5153  */
5154 static void
5155 sctp_select_primary_destination(struct sctp_tcb *stcb)
5156 {
5157         struct sctp_nets *net;
5158
5159         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5160                 /* for now, we'll just pick the first reachable one we find */
5161                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5162                         continue;
5163                 if (sctp_destination_is_reachable(stcb,
5164                     (struct sockaddr *)&net->ro._l_addr)) {
5165                         /* found a reachable destination */
5166                         stcb->asoc.primary_destination = net;
5167                 }
5168         }
5169         /* I can't there from here! ...we're gonna die shortly... */
5170 }
5171
5172
5173 /*
5174  * Delete the address from the endpoint local address list There is nothing
5175  * to be done if we are bound to all addresses
5176  */
5177 void
5178 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5179 {
5180         struct sctp_laddr *laddr;
5181         int fnd;
5182
5183         fnd = 0;
5184         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5185                 /* You are already bound to all. You have it already */
5186                 return;
5187         }
5188         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5189                 if (laddr->ifa == ifa) {
5190                         fnd = 1;
5191                         break;
5192                 }
5193         }
5194         if (fnd && (inp->laddr_count < 2)) {
5195                 /* can't delete unless there are at LEAST 2 addresses */
5196                 return;
5197         }
5198         if (fnd) {
5199                 /*
5200                  * clean up any use of this address go through our
5201                  * associations and clear any last_used_address that match
5202                  * this one for each assoc, see if a new primary_destination
5203                  * is needed
5204                  */
5205                 struct sctp_tcb *stcb;
5206
5207                 /* clean up "next_addr_touse" */
5208                 if (inp->next_addr_touse == laddr)
5209                         /* delete this address */
5210                         inp->next_addr_touse = NULL;
5211
5212                 /* clean up "last_used_address" */
5213                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5214                         struct sctp_nets *net;
5215
5216                         SCTP_TCB_LOCK(stcb);
5217                         if (stcb->asoc.last_used_address == laddr)
5218                                 /* delete this address */
5219                                 stcb->asoc.last_used_address = NULL;
5220                         /*
5221                          * Now spin through all the nets and purge any ref
5222                          * to laddr
5223                          */
5224                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5225                                 if (net->ro._s_addr &&
5226                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5227                                         /* Yep, purge src address selected */
5228                                         sctp_rtentry_t *rt;
5229
5230                                         /* delete this address if cached */
5231                                         rt = net->ro.ro_rt;
5232                                         if (rt != NULL) {
5233                                                 RTFREE(rt);
5234                                                 net->ro.ro_rt = NULL;
5235                                         }
5236                                         sctp_free_ifa(net->ro._s_addr);
5237                                         net->ro._s_addr = NULL;
5238                                         net->src_addr_selected = 0;
5239                                 }
5240                         }
5241                         SCTP_TCB_UNLOCK(stcb);
5242                 }               /* for each tcb */
5243                 /* remove it from the ep list */
5244                 sctp_remove_laddr(laddr);
5245                 inp->laddr_count--;
5246                 /* update inp_vflag flags */
5247                 sctp_update_ep_vflag(inp);
5248         }
5249         return;
5250 }
5251
5252 /*
5253  * Add the address to the TCB local address restricted list.
5254  * This is a "pending" address list (eg. addresses waiting for an
5255  * ASCONF-ACK response) and cannot be used as a valid source address.
5256  */
5257 void
5258 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5259 {
5260         struct sctp_inpcb *inp;
5261         struct sctp_laddr *laddr;
5262         struct sctpladdr *list;
5263
5264         /*
5265          * Assumes TCB is locked.. and possibly the INP. May need to
5266          * confirm/fix that if we need it and is not the case.
5267          */
5268         list = &stcb->asoc.sctp_restricted_addrs;
5269
5270         inp = stcb->sctp_ep;
5271         if (ifa->address.sa.sa_family == AF_INET6) {
5272                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5273                         /* Can't bind a non-existent addr. */
5274                         return;
5275                 }
5276         }
5277         /* does the address already exist? */
5278         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5279                 if (laddr->ifa == ifa) {
5280                         return;
5281                 }
5282         }
5283
5284         /* add to the list */
5285         (void)sctp_insert_laddr(list, ifa, 0);
5286         return;
5287 }
5288
5289 /*
5290  * insert an laddr entry with the given ifa for the desired list
5291  */
5292 int
5293 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5294 {
5295         struct sctp_laddr *laddr;
5296
5297         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5298         if (laddr == NULL) {
5299                 /* out of memory? */
5300                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5301                 return (EINVAL);
5302         }
5303         SCTP_INCR_LADDR_COUNT();
5304         bzero(laddr, sizeof(*laddr));
5305         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5306         laddr->ifa = ifa;
5307         laddr->action = act;
5308         atomic_add_int(&ifa->refcount, 1);
5309         /* insert it */
5310         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5311
5312         return (0);
5313 }
5314
5315 /*
5316  * Remove an laddr entry from the local address list (on an assoc)
5317  */
5318 void
5319 sctp_remove_laddr(struct sctp_laddr *laddr)
5320 {
5321
5322         /* remove from the list */
5323         LIST_REMOVE(laddr, sctp_nxt_addr);
5324         sctp_free_ifa(laddr->ifa);
5325         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5326         SCTP_DECR_LADDR_COUNT();
5327 }
5328
5329 /*
5330  * Remove a local address from the TCB local address restricted list
5331  */
5332 void
5333 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5334 {
5335         struct sctp_inpcb *inp;
5336         struct sctp_laddr *laddr;
5337
5338         /*
5339          * This is called by asconf work. It is assumed that a) The TCB is
5340          * locked and b) The INP is locked. This is true in as much as I can
5341          * trace through the entry asconf code where I did these locks.
5342          * Again, the ASCONF code is a bit different in that it does lock
5343          * the INP during its work often times. This must be since we don't
5344          * want other proc's looking up things while what they are looking
5345          * up is changing :-D
5346          */
5347
5348         inp = stcb->sctp_ep;
5349         /* if subset bound and don't allow ASCONF's, can't delete last */
5350         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5351             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5352                 if (stcb->sctp_ep->laddr_count < 2) {
5353                         /* can't delete last address */
5354                         return;
5355                 }
5356         }
5357         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5358                 /* remove the address if it exists */
5359                 if (laddr->ifa == NULL)
5360                         continue;
5361                 if (laddr->ifa == ifa) {
5362                         sctp_remove_laddr(laddr);
5363                         return;
5364                 }
5365         }
5366
5367         /* address not found! */
5368         return;
5369 }
5370
5371 /*
5372  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5373  */
5374 /* sysctl */
5375 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5376 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5377
5378 void
5379 sctp_pcb_init()
5380 {
5381         /*
5382          * SCTP initialization for the PCB structures should be called by
5383          * the sctp_init() funciton.
5384          */
5385         int i;
5386         struct timeval tv;
5387
5388         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5389                 /* error I was called twice */
5390                 return;
5391         }
5392         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5393
5394 #if defined(SCTP_LOCAL_TRACE_BUF)
5395         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5396 #endif
5397         (void)SCTP_GETTIME_TIMEVAL(&tv);
5398         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5399         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5400         /* init the empty list of (All) Endpoints */
5401         LIST_INIT(&SCTP_BASE_INFO(listhead));
5402
5403         /* init the iterator head */
5404         TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead));
5405
5406         /* init the hash table of endpoints */
5407         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5408         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5409         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5410         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5411             &SCTP_BASE_INFO(hashasocmark));
5412         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5413             &SCTP_BASE_INFO(hashmark));
5414         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5415             &SCTP_BASE_INFO(hashtcpmark));
5416         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5417
5418
5419         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5420             &SCTP_BASE_INFO(hashvrfmark));
5421
5422         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5423             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5424         /* init the zones */
5425         /*
5426          * FIX ME: Should check for NULL returns, but if it does fail we are
5427          * doomed to panic anyways... add later maybe.
5428          */
5429         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5430             sizeof(struct sctp_inpcb), maxsockets);
5431
5432         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5433             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5434
5435         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5436             sizeof(struct sctp_laddr),
5437             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5438
5439         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5440             sizeof(struct sctp_nets),
5441             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5442
5443         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5444             sizeof(struct sctp_tmit_chunk),
5445             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5446
5447         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5448             sizeof(struct sctp_queued_to_read),
5449             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5450
5451         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5452             sizeof(struct sctp_stream_queue_pending),
5453             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5454
5455         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5456             sizeof(struct sctp_asconf),
5457             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5458
5459         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5460             sizeof(struct sctp_asconf_ack),
5461             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5462
5463
5464         /* Master Lock INIT for info structure */
5465         SCTP_INP_INFO_LOCK_INIT();
5466         SCTP_STATLOG_INIT_LOCK();
5467         SCTP_ITERATOR_LOCK_INIT();
5468
5469         SCTP_IPI_COUNT_INIT();
5470         SCTP_IPI_ADDR_INIT();
5471         SCTP_IPI_ITERATOR_WQ_INIT();
5472 #ifdef SCTP_PACKET_LOGGING
5473         SCTP_IP_PKTLOG_INIT();
5474 #endif
5475         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5476
5477         /* not sure if we need all the counts */
5478         SCTP_BASE_INFO(ipi_count_ep) = 0;
5479         /* assoc/tcb zone info */
5480         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5481         /* local addrlist zone info */
5482         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5483         /* remote addrlist zone info */
5484         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5485         /* chunk info */
5486         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5487
5488         /* socket queue zone info */
5489         SCTP_BASE_INFO(ipi_count_readq) = 0;
5490
5491         /* stream out queue cont */
5492         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5493
5494         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5495         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5496
5497         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5498
5499         /* Init the TIMEWAIT list */
5500         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5501                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait[i]));
5502         }
5503
5504 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
5505         SCTP_BASE_INFO(iterator_running) = 0;
5506         SCTP_BASE_INFO(threads_must_exit) = 0;
5507         sctp_startup_iterator();
5508 #endif
5509
5510         /*
5511          * INIT the default VRF which for BSD is the only one, other O/S's
5512          * may have more. But initially they must start with one and then
5513          * add the VRF's as addresses are added.
5514          */
5515         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5516
5517 }
5518
5519 /*
5520  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5521  */
5522 void
5523 sctp_pcb_finish(void)
5524 {
5525         struct sctp_vrflist *vrf_bucket;
5526         struct sctp_vrf *vrf;
5527         struct sctp_ifn *ifn;
5528         struct sctp_ifa *ifa;
5529         struct sctpvtaghead *chain;
5530         struct sctp_tagblock *twait_block, *prev_twait_block;
5531         int i;
5532
5533         /*
5534          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5535          * destroyed first).
5536          */
5537         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5538         vrf = LIST_FIRST(vrf_bucket);
5539         while (vrf) {
5540                 ifn = LIST_FIRST(&vrf->ifnlist);
5541                 while (ifn) {
5542                         ifa = LIST_FIRST(&ifn->ifalist);
5543                         while (ifa) {
5544                                 /* free the ifa */
5545                                 LIST_REMOVE(ifa, next_bucket);
5546                                 LIST_REMOVE(ifa, next_ifa);
5547                                 SCTP_FREE(ifa, SCTP_M_IFA);
5548                                 ifa = LIST_FIRST(&ifn->ifalist);
5549                         }
5550                         /* free the ifn */
5551                         LIST_REMOVE(ifn, next_bucket);
5552                         LIST_REMOVE(ifn, next_ifn);
5553                         SCTP_FREE(ifn, SCTP_M_IFN);
5554                         ifn = LIST_FIRST(&vrf->ifnlist);
5555                 }
5556                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5557                 /* free the vrf */
5558                 LIST_REMOVE(vrf, next_vrf);
5559                 SCTP_FREE(vrf, SCTP_M_VRF);
5560                 vrf = LIST_FIRST(vrf_bucket);
5561         }
5562         /* free the vrf hashes */
5563         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5564         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5565
5566         /*
5567          * free the TIMEWAIT list elements malloc'd in the function
5568          * sctp_add_vtag_to_timewait()...
5569          */
5570         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5571                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5572                 if (!SCTP_LIST_EMPTY(chain)) {
5573                         prev_twait_block = NULL;
5574                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5575                                 if (prev_twait_block) {
5576                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5577                                 }
5578                                 prev_twait_block = twait_block;
5579                         }
5580                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5581                 }
5582         }
5583
5584         /* free the locks and mutexes */
5585 #ifdef SCTP_PACKET_LOGGING
5586         SCTP_IP_PKTLOG_DESTROY();
5587
5588 #endif
5589         SCTP_IPI_ITERATOR_WQ_DESTROY();
5590         SCTP_IPI_ADDR_DESTROY();
5591         SCTP_ITERATOR_LOCK_DESTROY();
5592         SCTP_STATLOG_DESTROY();
5593         SCTP_INP_INFO_LOCK_DESTROY();
5594
5595         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5596         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5597         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5598         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5599         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5600         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5601         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5602         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5603         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5604         /* Get rid of other stuff to */
5605         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5606                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5607         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5608                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5609         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5610                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5611
5612 }
5613
5614
5615 int
5616 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5617     int iphlen, int offset, int limit, struct sctphdr *sh,
5618     struct sockaddr *altsa)
5619 {
5620         /*
5621          * grub through the INIT pulling addresses and loading them to the
5622          * nets structure in the asoc. The from address in the mbuf should
5623          * also be loaded (if it is not already). This routine can be called
5624          * with either INIT or INIT-ACK's as long as the m points to the IP
5625          * packet and the offset points to the beginning of the parameters.
5626          */
5627         struct sctp_inpcb *inp, *l_inp;
5628         struct sctp_nets *net, *net_tmp;
5629         struct ip *iph;
5630         struct sctp_paramhdr *phdr, parm_buf;
5631         struct sctp_tcb *stcb_tmp;
5632         uint16_t ptype, plen;
5633         struct sockaddr *sa;
5634         struct sockaddr_storage dest_store;
5635         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5636         struct sockaddr_in sin;
5637         struct sockaddr_in6 sin6;
5638         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5639         struct sctp_auth_random *p_random = NULL;
5640         uint16_t random_len = 0;
5641         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5642         struct sctp_auth_hmac_algo *hmacs = NULL;
5643         uint16_t hmacs_len = 0;
5644         uint8_t saw_asconf = 0;
5645         uint8_t saw_asconf_ack = 0;
5646         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5647         struct sctp_auth_chunk_list *chunks = NULL;
5648         uint16_t num_chunks = 0;
5649         sctp_key_t *new_key;
5650         uint32_t keylen;
5651         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5652
5653         /* First get the destination address setup too. */
5654         memset(&sin, 0, sizeof(sin));
5655         memset(&sin6, 0, sizeof(sin6));
5656
5657         sin.sin_family = AF_INET;
5658         sin.sin_len = sizeof(sin);
5659         sin.sin_port = stcb->rport;
5660
5661         sin6.sin6_family = AF_INET6;
5662         sin6.sin6_len = sizeof(struct sockaddr_in6);
5663         sin6.sin6_port = stcb->rport;
5664         if (altsa == NULL) {
5665                 iph = mtod(m, struct ip *);
5666                 switch (iph->ip_v) {
5667                 case IPVERSION:
5668                         {
5669                                 /* its IPv4 */
5670                                 struct sockaddr_in *sin_2;
5671
5672                                 sin_2 = (struct sockaddr_in *)(local_sa);
5673                                 memset(sin_2, 0, sizeof(sin));
5674                                 sin_2->sin_family = AF_INET;
5675                                 sin_2->sin_len = sizeof(sin);
5676                                 sin_2->sin_port = sh->dest_port;
5677                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5678                                 sin.sin_addr = iph->ip_src;
5679                                 sa = (struct sockaddr *)&sin;
5680                                 break;
5681                         }
5682 #ifdef INET6
5683                 case IPV6_VERSION >> 4:
5684                         {
5685                                 /* its IPv6 */
5686                                 struct ip6_hdr *ip6;
5687                                 struct sockaddr_in6 *sin6_2;
5688
5689                                 ip6 = mtod(m, struct ip6_hdr *);
5690                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5691                                 memset(sin6_2, 0, sizeof(sin6));
5692                                 sin6_2->sin6_family = AF_INET6;
5693                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5694                                 sin6_2->sin6_port = sh->dest_port;
5695                                 sin6.sin6_addr = ip6->ip6_src;
5696                                 sa = (struct sockaddr *)&sin6;
5697                                 break;
5698                         }
5699 #endif
5700                 default:
5701                         sa = NULL;
5702                         break;
5703                 }
5704         } else {
5705                 /*
5706                  * For cookies we use the src address NOT from the packet
5707                  * but from the original INIT
5708                  */
5709                 sa = altsa;
5710         }
5711         /* Turn off ECN until we get through all params */
5712         stcb->asoc.ecn_allowed = 0;
5713         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5714                 /* mark all addresses that we have currently on the list */
5715                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5716         }
5717         /* does the source address already exist? if so skip it */
5718         l_inp = inp = stcb->sctp_ep;
5719
5720         atomic_add_int(&stcb->asoc.refcnt, 1);
5721         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5722         atomic_add_int(&stcb->asoc.refcnt, -1);
5723
5724         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5725                 /* we must add the source address */
5726                 /* no scope set here since we have a tcb already. */
5727                 if ((sa->sa_family == AF_INET) &&
5728                     (stcb->asoc.ipv4_addr_legal)) {
5729                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5730                                 return (-1);
5731                         }
5732                 } else if ((sa->sa_family == AF_INET6) &&
5733                     (stcb->asoc.ipv6_addr_legal)) {
5734                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5735                                 return (-2);
5736                         }
5737                 }
5738         } else {
5739                 if (net_tmp != NULL && stcb_tmp == stcb) {
5740                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5741                 } else if (stcb_tmp != stcb) {
5742                         /* It belongs to another association? */
5743                         if (stcb_tmp)
5744                                 SCTP_TCB_UNLOCK(stcb_tmp);
5745                         return (-3);
5746                 }
5747         }
5748         if (stcb->asoc.state == 0) {
5749                 /* the assoc was freed? */
5750                 return (-4);
5751         }
5752         /*
5753          * peer must explicitly turn this on. This may have been initialized
5754          * to be "on" in order to allow local addr changes while INIT's are
5755          * in flight.
5756          */
5757         stcb->asoc.peer_supports_asconf = 0;
5758         /* now we must go through each of the params. */
5759         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5760         while (phdr) {
5761                 ptype = ntohs(phdr->param_type);
5762                 plen = ntohs(phdr->param_length);
5763                 /*
5764                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5765                  * (int)plen);
5766                  */
5767                 if (offset + plen > limit) {
5768                         break;
5769                 }
5770                 if (plen == 0) {
5771                         break;
5772                 }
5773                 if (ptype == SCTP_IPV4_ADDRESS) {
5774                         if (stcb->asoc.ipv4_addr_legal) {
5775                                 struct sctp_ipv4addr_param *p4, p4_buf;
5776
5777                                 /* ok get the v4 address and check/add */
5778                                 phdr = sctp_get_next_param(m, offset,
5779                                     (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5780                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5781                                     phdr == NULL) {
5782                                         return (-5);
5783                                 }
5784                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5785                                 sin.sin_addr.s_addr = p4->addr;
5786                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5787                                         /* Skip multi-cast addresses */
5788                                         goto next_param;
5789                                 }
5790                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5791                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5792                                         goto next_param;
5793                                 }
5794                                 sa = (struct sockaddr *)&sin;
5795                                 inp = stcb->sctp_ep;
5796                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5797                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5798                                     local_sa, stcb);
5799                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5800
5801                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5802                                     inp == NULL) {
5803                                         /* we must add the source address */
5804                                         /*
5805                                          * no scope set since we have a tcb
5806                                          * already
5807                                          */
5808
5809                                         /*
5810                                          * we must validate the state again
5811                                          * here
5812                                          */
5813                         add_it_now:
5814                                         if (stcb->asoc.state == 0) {
5815                                                 /* the assoc was freed? */
5816                                                 return (-7);
5817                                         }
5818                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
5819                                                 return (-8);
5820                                         }
5821                                 } else if (stcb_tmp == stcb) {
5822                                         if (stcb->asoc.state == 0) {
5823                                                 /* the assoc was freed? */
5824                                                 return (-10);
5825                                         }
5826                                         if (net != NULL) {
5827                                                 /* clear flag */
5828                                                 net->dest_state &=
5829                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5830                                         }
5831                                 } else {
5832                                         /*
5833                                          * strange, address is in another
5834                                          * assoc? straighten out locks.
5835                                          */
5836                                         if (stcb_tmp) {
5837                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5838                                                         /*
5839                                                          * in setup state we
5840                                                          * abort this guy
5841                                                          */
5842                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
5843                                                             stcb_tmp, 1, NULL, 0);
5844                                                         goto add_it_now;
5845                                                 }
5846                                                 SCTP_TCB_UNLOCK(stcb_tmp);
5847                                         }
5848                                         if (stcb->asoc.state == 0) {
5849                                                 /* the assoc was freed? */
5850                                                 return (-12);
5851                                         }
5852                                         return (-13);
5853                                 }
5854                         }
5855                 } else if (ptype == SCTP_IPV6_ADDRESS) {
5856                         if (stcb->asoc.ipv6_addr_legal) {
5857                                 /* ok get the v6 address and check/add */
5858                                 struct sctp_ipv6addr_param *p6, p6_buf;
5859
5860                                 phdr = sctp_get_next_param(m, offset,
5861                                     (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5862                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5863                                     phdr == NULL) {
5864                                         return (-14);
5865                                 }
5866                                 p6 = (struct sctp_ipv6addr_param *)phdr;
5867                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5868                                     sizeof(p6->addr));
5869                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
5870                                         /* Skip multi-cast addresses */
5871                                         goto next_param;
5872                                 }
5873                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
5874                                         /*
5875                                          * Link local make no sense without
5876                                          * scope
5877                                          */
5878                                         goto next_param;
5879                                 }
5880                                 sa = (struct sockaddr *)&sin6;
5881                                 inp = stcb->sctp_ep;
5882                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5883                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5884                                     local_sa, stcb);
5885                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5886                                 if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
5887                                     inp == NULL)) {
5888                                         /*
5889                                          * we must validate the state again
5890                                          * here
5891                                          */
5892                         add_it_now6:
5893                                         if (stcb->asoc.state == 0) {
5894                                                 /* the assoc was freed? */
5895                                                 return (-16);
5896                                         }
5897                                         /*
5898                                          * we must add the address, no scope
5899                                          * set
5900                                          */
5901                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
5902                                                 return (-17);
5903                                         }
5904                                 } else if (stcb_tmp == stcb) {
5905                                         /*
5906                                          * we must validate the state again
5907                                          * here
5908                                          */
5909                                         if (stcb->asoc.state == 0) {
5910                                                 /* the assoc was freed? */
5911                                                 return (-19);
5912                                         }
5913                                         if (net != NULL) {
5914                                                 /* clear flag */
5915                                                 net->dest_state &=
5916                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
5917                                         }
5918                                 } else {
5919                                         /*
5920                                          * strange, address is in another
5921                                          * assoc? straighten out locks.
5922                                          */
5923                                         if (stcb_tmp)
5924                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
5925                                                         /*
5926                                                          * in setup state we
5927                                                          * abort this guy
5928                                                          */
5929                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
5930                                                             stcb_tmp, 1, NULL, 0);
5931                                                         goto add_it_now6;
5932                                                 }
5933                                         SCTP_TCB_UNLOCK(stcb_tmp);
5934
5935                                         if (stcb->asoc.state == 0) {
5936                                                 /* the assoc was freed? */
5937                                                 return (-21);
5938                                         }
5939                                         return (-22);
5940                                 }
5941                         }
5942                 } else if (ptype == SCTP_ECN_CAPABLE) {
5943                         stcb->asoc.ecn_allowed = 1;
5944                 } else if (ptype == SCTP_ULP_ADAPTATION) {
5945                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
5946                                 struct sctp_adaptation_layer_indication ai,
5947                                                                 *aip;
5948
5949                                 phdr = sctp_get_next_param(m, offset,
5950                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
5951                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
5952                                 if (aip) {
5953                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
5954                                         stcb->asoc.adaptation_needed = 1;
5955                                 }
5956                         }
5957                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
5958                         struct sctp_asconf_addr_param lstore, *fee;
5959                         struct sctp_asconf_addrv4_param *fii;
5960                         int lptype;
5961                         struct sockaddr *lsa = NULL;
5962
5963                         stcb->asoc.peer_supports_asconf = 1;
5964                         if (plen > sizeof(lstore)) {
5965                                 return (-23);
5966                         }
5967                         phdr = sctp_get_next_param(m, offset,
5968                             (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
5969                         if (phdr == NULL) {
5970                                 return (-24);
5971                         }
5972                         fee = (struct sctp_asconf_addr_param *)phdr;
5973                         lptype = ntohs(fee->addrp.ph.param_type);
5974                         if (lptype == SCTP_IPV4_ADDRESS) {
5975                                 if (plen !=
5976                                     sizeof(struct sctp_asconf_addrv4_param)) {
5977                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
5978                                             (int)sizeof(struct sctp_asconf_addrv4_param),
5979                                             plen);
5980                                 } else {
5981                                         fii = (struct sctp_asconf_addrv4_param *)fee;
5982                                         sin.sin_addr.s_addr = fii->addrp.addr;
5983                                         lsa = (struct sockaddr *)&sin;
5984                                 }
5985                         } else if (lptype == SCTP_IPV6_ADDRESS) {
5986                                 if (plen !=
5987                                     sizeof(struct sctp_asconf_addr_param)) {
5988                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
5989                                             (int)sizeof(struct sctp_asconf_addr_param),
5990                                             plen);
5991                                 } else {
5992                                         memcpy(sin6.sin6_addr.s6_addr,
5993                                             fee->addrp.addr,
5994                                             sizeof(fee->addrp.addr));
5995                                         lsa = (struct sockaddr *)&sin6;
5996                                 }
5997                         }
5998                         if (lsa) {
5999                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6000                         }
6001                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6002                         stcb->asoc.peer_supports_nat = 1;
6003                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6004                         /* Peer supports pr-sctp */
6005                         stcb->asoc.peer_supports_prsctp = 1;
6006                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6007                         /* A supported extension chunk */
6008                         struct sctp_supported_chunk_types_param *pr_supported;
6009                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6010                         int num_ent, i;
6011
6012                         phdr = sctp_get_next_param(m, offset,
6013                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6014                         if (phdr == NULL) {
6015                                 return (-25);
6016                         }
6017                         stcb->asoc.peer_supports_asconf = 0;
6018                         stcb->asoc.peer_supports_prsctp = 0;
6019                         stcb->asoc.peer_supports_pktdrop = 0;
6020                         stcb->asoc.peer_supports_strreset = 0;
6021                         stcb->asoc.peer_supports_auth = 0;
6022                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6023                         num_ent = plen - sizeof(struct sctp_paramhdr);
6024                         for (i = 0; i < num_ent; i++) {
6025                                 switch (pr_supported->chunk_types[i]) {
6026                                 case SCTP_ASCONF:
6027                                 case SCTP_ASCONF_ACK:
6028                                         stcb->asoc.peer_supports_asconf = 1;
6029                                         break;
6030                                 case SCTP_FORWARD_CUM_TSN:
6031                                         stcb->asoc.peer_supports_prsctp = 1;
6032                                         break;
6033                                 case SCTP_PACKET_DROPPED:
6034                                         stcb->asoc.peer_supports_pktdrop = 1;
6035                                         break;
6036                                 case SCTP_STREAM_RESET:
6037                                         stcb->asoc.peer_supports_strreset = 1;
6038                                         break;
6039                                 case SCTP_AUTHENTICATION:
6040                                         stcb->asoc.peer_supports_auth = 1;
6041                                         break;
6042                                 default:
6043                                         /* one I have not learned yet */
6044                                         break;
6045
6046                                 }
6047                         }
6048                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6049                         /* Peer supports ECN-nonce */
6050                         stcb->asoc.peer_supports_ecn_nonce = 1;
6051                         stcb->asoc.ecn_nonce_allowed = 1;
6052                 } else if (ptype == SCTP_RANDOM) {
6053                         if (plen > sizeof(random_store))
6054                                 break;
6055                         if (got_random) {
6056                                 /* already processed a RANDOM */
6057                                 goto next_param;
6058                         }
6059                         phdr = sctp_get_next_param(m, offset,
6060                             (struct sctp_paramhdr *)random_store,
6061                             min(sizeof(random_store), plen));
6062                         if (phdr == NULL)
6063                                 return (-26);
6064                         p_random = (struct sctp_auth_random *)phdr;
6065                         random_len = plen - sizeof(*p_random);
6066                         /* enforce the random length */
6067                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6068                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6069                                 return (-27);
6070                         }
6071                         got_random = 1;
6072                 } else if (ptype == SCTP_HMAC_LIST) {
6073                         int num_hmacs;
6074                         int i;
6075
6076                         if (plen > sizeof(hmacs_store))
6077                                 break;
6078                         if (got_hmacs) {
6079                                 /* already processed a HMAC list */
6080                                 goto next_param;
6081                         }
6082                         phdr = sctp_get_next_param(m, offset,
6083                             (struct sctp_paramhdr *)hmacs_store,
6084                             min(plen, sizeof(hmacs_store)));
6085                         if (phdr == NULL)
6086                                 return (-28);
6087                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6088                         hmacs_len = plen - sizeof(*hmacs);
6089                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6090                         /* validate the hmac list */
6091                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6092                                 return (-29);
6093                         }
6094                         if (stcb->asoc.peer_hmacs != NULL)
6095                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6096                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6097                         if (stcb->asoc.peer_hmacs != NULL) {
6098                                 for (i = 0; i < num_hmacs; i++) {
6099                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6100                                             ntohs(hmacs->hmac_ids[i]));
6101                                 }
6102                         }
6103                         got_hmacs = 1;
6104                 } else if (ptype == SCTP_CHUNK_LIST) {
6105                         int i;
6106
6107                         if (plen > sizeof(chunks_store))
6108                                 break;
6109                         if (got_chklist) {
6110                                 /* already processed a Chunks list */
6111                                 goto next_param;
6112                         }
6113                         phdr = sctp_get_next_param(m, offset,
6114                             (struct sctp_paramhdr *)chunks_store,
6115                             min(plen, sizeof(chunks_store)));
6116                         if (phdr == NULL)
6117                                 return (-30);
6118                         chunks = (struct sctp_auth_chunk_list *)phdr;
6119                         num_chunks = plen - sizeof(*chunks);
6120                         if (stcb->asoc.peer_auth_chunks != NULL)
6121                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6122                         else
6123                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6124                         for (i = 0; i < num_chunks; i++) {
6125                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6126                                     stcb->asoc.peer_auth_chunks);
6127                                 /* record asconf/asconf-ack if listed */
6128                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6129                                         saw_asconf = 1;
6130                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6131                                         saw_asconf_ack = 1;
6132
6133                         }
6134                         got_chklist = 1;
6135                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6136                             (ptype == SCTP_STATE_COOKIE) ||
6137                             (ptype == SCTP_UNRECOG_PARAM) ||
6138                             (ptype == SCTP_COOKIE_PRESERVE) ||
6139                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6140                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6141                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6142                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6143                     (ptype == SCTP_SUCCESS_REPORT)) {
6144                          /* don't care */ ;
6145                 } else {
6146                         if ((ptype & 0x8000) == 0x0000) {
6147                                 /*
6148                                  * must stop processing the rest of the
6149                                  * param's. Any report bits were handled
6150                                  * with the call to
6151                                  * sctp_arethere_unrecognized_parameters()
6152                                  * when the INIT or INIT-ACK was first seen.
6153                                  */
6154                                 break;
6155                         }
6156                 }
6157 next_param:
6158                 offset += SCTP_SIZE32(plen);
6159                 if (offset >= limit) {
6160                         break;
6161                 }
6162                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6163                     sizeof(parm_buf));
6164         }
6165         /* Now check to see if we need to purge any addresses */
6166         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6167                 net_tmp = TAILQ_NEXT(net, sctp_next);
6168                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6169                     SCTP_ADDR_NOT_IN_ASSOC) {
6170                         /* This address has been removed from the asoc */
6171                         /* remove and free it */
6172                         stcb->asoc.numnets--;
6173                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6174                         sctp_free_remote_addr(net);
6175                         if (net == stcb->asoc.primary_destination) {
6176                                 stcb->asoc.primary_destination = NULL;
6177                                 sctp_select_primary_destination(stcb);
6178                         }
6179                 }
6180         }
6181         /* validate authentication required parameters */
6182         if (got_random && got_hmacs) {
6183                 stcb->asoc.peer_supports_auth = 1;
6184         } else {
6185                 stcb->asoc.peer_supports_auth = 0;
6186         }
6187         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6188                 /* peer does not support auth but sent a chunks list? */
6189                 return (-31);
6190         }
6191         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6192             !stcb->asoc.peer_supports_auth) {
6193                 /* peer supports asconf but not auth? */
6194                 return (-32);
6195         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6196             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6197                 return (-33);
6198         }
6199         /* concatenate the full random key */
6200 #ifdef SCTP_AUTH_DRAFT_04
6201         keylen = random_len;
6202         new_key = sctp_alloc_key(keylen);
6203         if (new_key != NULL) {
6204                 /* copy in the RANDOM */
6205                 if (p_random != NULL)
6206                         bcopy(p_random->random_data, new_key->key, random_len);
6207         }
6208 #else
6209         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
6210             sizeof(*hmacs) + hmacs_len;
6211         new_key = sctp_alloc_key(keylen);
6212         if (new_key != NULL) {
6213                 /* copy in the RANDOM */
6214                 if (p_random != NULL) {
6215                         keylen = sizeof(*p_random) + random_len;
6216                         bcopy(p_random, new_key->key, keylen);
6217                 }
6218                 /* append in the AUTH chunks */
6219                 if (chunks != NULL) {
6220                         bcopy(chunks, new_key->key + keylen,
6221                             sizeof(*chunks) + num_chunks);
6222                         keylen += sizeof(*chunks) + num_chunks;
6223                 }
6224                 /* append in the HMACs */
6225                 if (hmacs != NULL) {
6226                         bcopy(hmacs, new_key->key + keylen,
6227                             sizeof(*hmacs) + hmacs_len);
6228                 }
6229         }
6230 #endif
6231         else {
6232                 /* failed to get memory for the key */
6233                 return (-34);
6234         }
6235         if (stcb->asoc.authinfo.peer_random != NULL)
6236                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6237         stcb->asoc.authinfo.peer_random = new_key;
6238 #ifdef SCTP_AUTH_DRAFT_04
6239         /* don't include the chunks and hmacs for draft -04 */
6240         stcb->asoc.authinfo.peer_random->keylen = random_len;
6241 #endif
6242         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6243         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6244
6245         return (0);
6246 }
6247
6248 int
6249 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6250     struct sctp_nets *net)
6251 {
6252         /* make sure the requested primary address exists in the assoc */
6253         if (net == NULL && sa)
6254                 net = sctp_findnet(stcb, sa);
6255
6256         if (net == NULL) {
6257                 /* didn't find the requested primary address! */
6258                 return (-1);
6259         } else {
6260                 /* set the primary address */
6261                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6262                         /* Must be confirmed, so queue to set */
6263                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6264                         return (0);
6265                 }
6266                 stcb->asoc.primary_destination = net;
6267                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6268                 net = TAILQ_FIRST(&stcb->asoc.nets);
6269                 if (net != stcb->asoc.primary_destination) {
6270                         /*
6271                          * first one on the list is NOT the primary
6272                          * sctp_cmpaddr() is much more efficent if the
6273                          * primary is the first on the list, make it so.
6274                          */
6275                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6276                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6277                 }
6278                 return (0);
6279         }
6280 }
6281
6282 int
6283 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6284 {
6285         /*
6286          * This function serves two purposes. It will see if a TAG can be
6287          * re-used and return 1 for yes it is ok and 0 for don't use that
6288          * tag. A secondary function it will do is purge out old tags that
6289          * can be removed.
6290          */
6291         struct sctpvtaghead *chain;
6292         struct sctp_tagblock *twait_block;
6293         struct sctpasochead *head;
6294         struct sctp_tcb *stcb;
6295         int i;
6296
6297         SCTP_INP_INFO_RLOCK();
6298         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6299             SCTP_BASE_INFO(hashasocmark))];
6300         if (head == NULL) {
6301                 /* invalid vtag */
6302                 goto skip_vtag_check;
6303         }
6304         LIST_FOREACH(stcb, head, sctp_asocs) {
6305                 /*
6306                  * We choose not to lock anything here. TCB's can't be
6307                  * removed since we have the read lock, so they can't be
6308                  * freed on us, same thing for the INP. I may be wrong with
6309                  * this assumption, but we will go with it for now :-)
6310                  */
6311                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6312                         continue;
6313                 }
6314                 if (stcb->asoc.my_vtag == tag) {
6315                         /* candidate */
6316                         if (stcb->rport != rport) {
6317                                 continue;
6318                         }
6319                         if (stcb->sctp_ep->sctp_lport != lport) {
6320                                 continue;
6321                         }
6322                         /* Its a used tag set */
6323                         SCTP_INP_INFO_WUNLOCK();
6324                         return (0);
6325                 }
6326         }
6327 skip_vtag_check:
6328
6329         chain = &SCTP_BASE_INFO(vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE))];
6330         /* Now what about timed wait ? */
6331         if (!SCTP_LIST_EMPTY(chain)) {
6332                 /*
6333                  * Block(s) are present, lets see if we have this tag in the
6334                  * list
6335                  */
6336                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6337                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6338                                 if (twait_block->vtag_block[i].v_tag == 0) {
6339                                         /* not used */
6340                                         continue;
6341                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6342                                     now->tv_sec) {
6343                                         /* Audit expires this guy */
6344                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6345                                         twait_block->vtag_block[i].v_tag = 0;
6346                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6347                                             (twait_block->vtag_block[i].lport == lport) &&
6348                                     (twait_block->vtag_block[i].rport == rport)) {
6349                                         /* Bad tag, sorry :< */
6350                                         SCTP_INP_INFO_WUNLOCK();
6351                                         return (0);
6352                                 }
6353                         }
6354                 }
6355         }
6356         SCTP_INP_INFO_RUNLOCK();
6357 #ifdef MICHAELS_EXPERIMENT
6358         /*-
6359          * Not found, ok to use the tag, add it to the time wait hash
6360          * as well this will prevent two sucessive cookies from getting
6361          * the same tag or two inits sent quickly on multi-processors.
6362          * We only keep the tag for the life of a cookie and when we
6363          * add this tag to the assoc hash we need to purge it from
6364          * the t-wait hash.
6365          */
6366         SCTP_INP_INFO_WLOCK();
6367         if (save_in_twait)
6368                 sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life, lport, rport));
6369         SCTP_INP_INFO_WUNLOCK();
6370 #endif
6371
6372         return (1);
6373 }
6374
6375
6376 static sctp_assoc_t reneged_asoc_ids[256];
6377 static uint8_t reneged_at = 0;
6378
6379
6380 static void
6381 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6382 {
6383         /*
6384          * We must hunt this association for MBUF's past the cumack (i.e.
6385          * out of order data that we can renege on).
6386          */
6387         struct sctp_association *asoc;
6388         struct sctp_tmit_chunk *chk, *nchk;
6389         uint32_t cumulative_tsn_p1, tsn;
6390         struct sctp_queued_to_read *ctl, *nctl;
6391         int cnt, strmat, gap;
6392
6393         /* We look for anything larger than the cum-ack + 1 */
6394
6395         SCTP_STAT_INCR(sctps_protocol_drain_calls);
6396         if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6397                 return;
6398         }
6399         asoc = &stcb->asoc;
6400         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6401                 /* none we can reneg on. */
6402                 return;
6403         }
6404         SCTP_STAT_INCR(sctps_protocol_drains_done);
6405         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6406         cnt = 0;
6407         /* First look in the re-assembly queue */
6408         chk = TAILQ_FIRST(&asoc->reasmqueue);
6409         while (chk) {
6410                 /* Get the next one */
6411                 nchk = TAILQ_NEXT(chk, sctp_next);
6412                 if (compare_with_wrap(chk->rec.data.TSN_seq,
6413                     cumulative_tsn_p1, MAX_TSN)) {
6414                         /* Yep it is above cum-ack */
6415                         cnt++;
6416                         tsn = chk->rec.data.TSN_seq;
6417                         if (tsn >= asoc->mapping_array_base_tsn) {
6418                                 gap = tsn - asoc->mapping_array_base_tsn;
6419                         } else {
6420                                 gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6421                                     tsn + 1;
6422                         }
6423                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6424                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6425                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6426                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6427                         if (chk->data) {
6428                                 sctp_m_freem(chk->data);
6429                                 chk->data = NULL;
6430                         }
6431                         sctp_free_a_chunk(stcb, chk);
6432                 }
6433                 chk = nchk;
6434         }
6435         /* Ok that was fun, now we will drain all the inbound streams? */
6436         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6437                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6438                 while (ctl) {
6439                         nctl = TAILQ_NEXT(ctl, next);
6440                         if (compare_with_wrap(ctl->sinfo_tsn,
6441                             cumulative_tsn_p1, MAX_TSN)) {
6442                                 /* Yep it is above cum-ack */
6443                                 cnt++;
6444                                 tsn = ctl->sinfo_tsn;
6445                                 if (tsn >= asoc->mapping_array_base_tsn) {
6446                                         gap = tsn -
6447                                             asoc->mapping_array_base_tsn;
6448                                 } else {
6449                                         gap = (MAX_TSN -
6450                                             asoc->mapping_array_base_tsn) +
6451                                             tsn + 1;
6452                                 }
6453                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6454                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6455
6456                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
6457                                     gap);
6458                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
6459                                     ctl, next);
6460                                 if (ctl->data) {
6461                                         sctp_m_freem(ctl->data);
6462                                         ctl->data = NULL;
6463                                 }
6464                                 sctp_free_remote_addr(ctl->whoFrom);
6465                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6466                                 SCTP_DECR_READQ_COUNT();
6467                         }
6468                         ctl = nctl;
6469                 }
6470         }
6471         /*
6472          * Question, should we go through the delivery queue? The only
6473          * reason things are on here is the app not reading OR a p-d-api up.
6474          * An attacker COULD send enough in to initiate the PD-API and then
6475          * send a bunch of stuff to other streams... these would wind up on
6476          * the delivery queue.. and then we would not get to them. But in
6477          * order to do this I then have to back-track and un-deliver
6478          * sequence numbers in streams.. el-yucko. I think for now we will
6479          * NOT look at the delivery queue and leave it to be something to
6480          * consider later. An alternative would be to abort the P-D-API with
6481          * a notification and then deliver the data.... Or another method
6482          * might be to keep track of how many times the situation occurs and
6483          * if we see a possible attack underway just abort the association.
6484          */
6485 #ifdef SCTP_DEBUG
6486         if (cnt) {
6487                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6488         }
6489 #endif
6490         if (cnt) {
6491                 /*
6492                  * Now do we need to find a new
6493                  * asoc->highest_tsn_inside_map?
6494                  */
6495                 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
6496                         gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
6497                 } else {
6498                         gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
6499                             asoc->highest_tsn_inside_map + 1;
6500                 }
6501                 if (gap >= (asoc->mapping_array_size << 3)) {
6502                         /*
6503                          * Something bad happened or cum-ack and high were
6504                          * behind the base, but if so earlier checks should
6505                          * have found NO data... wierd... we will start at
6506                          * end of mapping array.
6507                          */
6508                         SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
6509                             (int)gap,
6510                             (int)(asoc->mapping_array_size << 3),
6511                             (int)asoc->highest_tsn_inside_map);
6512                         gap = asoc->mapping_array_size << 3;
6513                 }
6514                 while (gap > 0) {
6515                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6516                                 /* found the new highest */
6517                                 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
6518                                 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6519                                         sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6520                                 }
6521                                 break;
6522                         }
6523                         gap--;
6524                 }
6525                 if (gap == 0) {
6526                         /* Nothing left in map */
6527                         memset(asoc->mapping_array, 0, asoc->mapping_array_size);
6528                         asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
6529                         asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
6530                         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
6531                                 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
6532                         }
6533                 }
6534                 asoc->last_revoke_count = cnt;
6535                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6536                 /* sa_ignore NO_NULL_CHK */
6537                 sctp_send_sack(stcb);
6538                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6539                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6540                 reneged_at++;
6541         }
6542         /*
6543          * Another issue, in un-setting the TSN's in the mapping array we
6544          * DID NOT adjust the higest_tsn marker.  This will cause one of two
6545          * things to occur. It may cause us to do extra work in checking for
6546          * our mapping array movement. More importantly it may cause us to
6547          * SACK every datagram. This may not be a bad thing though since we
6548          * will recover once we get our cum-ack above and all this stuff we
6549          * dumped recovered.
6550          */
6551 }
6552
6553 void
6554 sctp_drain()
6555 {
6556         /*
6557          * We must walk the PCB lists for ALL associations here. The system
6558          * is LOW on MBUF's and needs help. This is where reneging will
6559          * occur. We really hope this does NOT happen!
6560          */
6561         struct sctp_inpcb *inp;
6562         struct sctp_tcb *stcb;
6563
6564         SCTP_INP_INFO_RLOCK();
6565         LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6566                 /* For each endpoint */
6567                 SCTP_INP_RLOCK(inp);
6568                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6569                         /* For each association */
6570                         SCTP_TCB_LOCK(stcb);
6571                         sctp_drain_mbufs(inp, stcb);
6572                         SCTP_TCB_UNLOCK(stcb);
6573                 }
6574                 SCTP_INP_RUNLOCK(inp);
6575         }
6576         SCTP_INP_INFO_RUNLOCK();
6577 }
6578
6579 /*
6580  * start a new iterator
6581  * iterates through all endpoints and associations based on the pcb_state
6582  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6583  * assocs and "ef" (optional) is executed when the iterator completes.
6584  * "inpf" (optional) is executed for each new endpoint as it is being
6585  * iterated through. inpe (optional) is called when the inp completes
6586  * its way through all the stcbs.
6587  */
6588 int
6589 sctp_initiate_iterator(inp_func inpf,
6590     asoc_func af,
6591     inp_func inpe,
6592     uint32_t pcb_state,
6593     uint32_t pcb_features,
6594     uint32_t asoc_state,
6595     void *argp,
6596     uint32_t argi,
6597     end_func ef,
6598     struct sctp_inpcb *s_inp,
6599     uint8_t chunk_output_off)
6600 {
6601         struct sctp_iterator *it = NULL;
6602
6603         if (af == NULL) {
6604                 return (-1);
6605         }
6606         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6607             SCTP_M_ITER);
6608         if (it == NULL) {
6609                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6610                 return (ENOMEM);
6611         }
6612         memset(it, 0, sizeof(*it));
6613         it->function_assoc = af;
6614         it->function_inp = inpf;
6615         if (inpf)
6616                 it->done_current_ep = 0;
6617         else
6618                 it->done_current_ep = 1;
6619         it->function_atend = ef;
6620         it->pointer = argp;
6621         it->val = argi;
6622         it->pcb_flags = pcb_state;
6623         it->pcb_features = pcb_features;
6624         it->asoc_state = asoc_state;
6625         it->function_inp_end = inpe;
6626         it->no_chunk_output = chunk_output_off;
6627         if (s_inp) {
6628                 it->inp = s_inp;
6629                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6630         } else {
6631                 SCTP_INP_INFO_RLOCK();
6632                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6633
6634                 SCTP_INP_INFO_RUNLOCK();
6635                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6636
6637         }
6638         SCTP_IPI_ITERATOR_WQ_LOCK();
6639         if (it->inp) {
6640                 SCTP_INP_INCR_REF(it->inp);
6641         }
6642         TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr);
6643 #if defined(SCTP_USE_THREAD_BASED_ITERATOR)
6644         if (SCTP_BASE_INFO(iterator_running) == 0) {
6645                 sctp_wakeup_iterator();
6646         }
6647         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6648 #else
6649         if (it->inp)
6650                 SCTP_INP_DECR_REF(it->inp);
6651         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6652         /* Init the timer */
6653         SCTP_OS_TIMER_INIT(&it->tmr.timer);
6654         /* add to the list of all iterators */
6655         sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
6656             NULL, NULL);
6657 #endif
6658         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6659         return (0);
6660 }