sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * a) Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  *
  10  * b) Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *   the documentation and/or other materials provided with the distribution.
  13  *
  14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28  * THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/udp.h>
  49
  50
  51 VNET_DEFINE(struct sctp_base_info, system_base_info);
  52
  53 /* FIX: we don't handle multiple link local scopes */
  54 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  55 #ifdef INET6
  56 int
  57 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  58 {
  59         struct sockaddr_in6 tmp_a, tmp_b;
  60
  61         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  62         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  63                 return 0;
  64         }
  65         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  66         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  67                 return 0;
  68         }
  69         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  70 }
  71
  72 #endif
  73
  74 void
  75 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  76 {
  77         /*
  78          * We really don't need to lock this, but I will just because it
  79          * does not hurt.
  80          */
  81         SCTP_INP_INFO_RLOCK();
  82         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  83         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  84         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  85         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  86         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  87         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  88         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  89         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  90
  91         SCTP_INP_INFO_RUNLOCK();
  92 }
  93
  94 /*
  95  * Addresses are added to VRF's (Virtual Router's). For BSD we
  96  * have only the default VRF 0. We maintain a hash list of
  97  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  98  * these has a list of addresses. When we add a new address
  99  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 100  * not exist we create it and add it to the list of IFN's
 101  * within the VRF. Once we have the sctp_ifn, we add the
 102  * address to the list. So we look something like:
 103  *
 104  * hash-vrf-table
 105  *   vrf-> ifn-> ifn -> ifn
 106  *   vrf    |
 107  *    ...   +--ifa-> ifa -> ifa
 108  *   vrf
 109  *
 110  * We keep these seperate lists since the SCTP subsystem will
 111  * point to these from its source address selection nets structure.
 112  * When an address is deleted it does not happen right away on
 113  * the SCTP side, it gets scheduled. What we do when a
 114  * delete happens is immediately remove the address from
 115  * the master list and decrement the refcount. As our
 116  * addip iterator works through and frees the src address
 117  * selection pointing to the sctp_ifa, eventually the refcount
 118  * will reach 0 and we will delete it. Note that it is assumed
 119  * that any locking on system level ifn/ifa is done at the
 120  * caller of these functions and these routines will only
 121  * lock the SCTP structures as they add or delete things.
 122  *
 123  * Other notes on VRF concepts.
 124  *  - An endpoint can be in multiple VRF's
 125  *  - An association lives within a VRF and only one VRF.
 126  *  - Any incoming packet we can deduce the VRF for by
 127  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 128  *  - Any downward send call or connect call must supply the
 129  *    VRF via ancillary data or via some sort of set default
 130  *    VRF socket option call (again for BSD no brainer since
 131  *    the VRF is always 0).
 132  *  - An endpoint may add multiple VRF's to it.
 133  *  - Listening sockets can accept associations in any
 134  *    of the VRF's they are in but the assoc will end up
 135  *    in only one VRF (gotten from the packet or connect/send).
 136  *
 137  */
 138
 139 struct sctp_vrf *
 140 sctp_allocate_vrf(int vrf_id)
 141 {
 142         struct sctp_vrf *vrf = NULL;
 143         struct sctp_vrflist *bucket;
 144
 145         /* First allocate the VRF structure */
 146         vrf = sctp_find_vrf(vrf_id);
 147         if (vrf) {
 148                 /* Already allocated */
 149                 return (vrf);
 150         }
 151         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 152             SCTP_M_VRF);
 153         if (vrf == NULL) {
 154                 /* No memory */
 155 #ifdef INVARIANTS
 156                 panic("No memory for VRF:%d", vrf_id);
 157 #endif
 158                 return (NULL);
 159         }
 160         /* setup the VRF */
 161         memset(vrf, 0, sizeof(struct sctp_vrf));
 162         vrf->vrf_id = vrf_id;
 163         LIST_INIT(&vrf->ifnlist);
 164         vrf->total_ifa_count = 0;
 165         vrf->refcount = 0;
 166         /* now also setup table ids */
 167         SCTP_INIT_VRF_TABLEID(vrf);
 168         /* Init the HASH of addresses */
 169         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 170             &vrf->vrf_addr_hashmark);
 171         if (vrf->vrf_addr_hash == NULL) {
 172                 /* No memory */
 173 #ifdef INVARIANTS
 174                 panic("No memory for VRF:%d", vrf_id);
 175 #endif
 176                 SCTP_FREE(vrf, SCTP_M_VRF);
 177                 return (NULL);
 178         }
 179         /* Add it to the hash table */
 180         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 181         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 182         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 183         return (vrf);
 184 }
 185
 186
 187 struct sctp_ifn *
 188 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 189 {
 190         struct sctp_ifn *sctp_ifnp;
 191         struct sctp_ifnlist *hash_ifn_head;
 192
 193         /*
 194          * We assume the lock is held for the addresses if thats wrong
 195          * problems could occur :-)
 196          */
 197         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 198         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 199                 if (sctp_ifnp->ifn_index == ifn_index) {
 200                         return (sctp_ifnp);
 201                 }
 202                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 203                         return (sctp_ifnp);
 204                 }
 205         }
 206         return (NULL);
 207 }
 208
 209
 210
 211 struct sctp_vrf *
 212 sctp_find_vrf(uint32_t vrf_id)
 213 {
 214         struct sctp_vrflist *bucket;
 215         struct sctp_vrf *liste;
 216
 217         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 218         LIST_FOREACH(liste, bucket, next_vrf) {
 219                 if (vrf_id == liste->vrf_id) {
 220                         return (liste);
 221                 }
 222         }
 223         return (NULL);
 224 }
 225
 226 void
 227 sctp_free_vrf(struct sctp_vrf *vrf)
 228 {
 229         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 230                 if (vrf->vrf_addr_hash) {
 231                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 232                         vrf->vrf_addr_hash = NULL;
 233                 }
 234                 /* We zero'd the count */
 235                 LIST_REMOVE(vrf, next_vrf);
 236                 SCTP_FREE(vrf, SCTP_M_VRF);
 237                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 238         }
 239 }
 240
 241 void
 242 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 243 {
 244         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 245                 /* We zero'd the count */
 246                 if (sctp_ifnp->vrf) {
 247                         sctp_free_vrf(sctp_ifnp->vrf);
 248                 }
 249                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 250                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 251         }
 252 }
 253
 254 void
 255 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 256 {
 257         struct sctp_ifn *sctp_ifnp;
 258
 259         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 260         if (sctp_ifnp != NULL) {
 261                 sctp_ifnp->ifn_mtu = mtu;
 262         }
 263 }
 264
 265
 266 void
 267 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 268 {
 269         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 270                 /* We zero'd the count */
 271                 if (sctp_ifap->ifn_p) {
 272                         sctp_free_ifn(sctp_ifap->ifn_p);
 273                 }
 274                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 275                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 276         }
 277 }
 278
 279 static void
 280 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 281 {
 282         struct sctp_ifn *found;
 283
 284         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 285         if (found == NULL) {
 286                 /* Not in the list.. sorry */
 287                 return;
 288         }
 289         if (hold_addr_lock == 0)
 290                 SCTP_IPI_ADDR_WLOCK();
 291         LIST_REMOVE(sctp_ifnp, next_bucket);
 292         LIST_REMOVE(sctp_ifnp, next_ifn);
 293         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 294             sctp_ifnp->registered_af);
 295         if (hold_addr_lock == 0)
 296                 SCTP_IPI_ADDR_WUNLOCK();
 297         /* Take away the reference, and possibly free it */
 298         sctp_free_ifn(sctp_ifnp);
 299 }
 300
 301 void
 302 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 303     const char *if_name, uint32_t ifn_index)
 304 {
 305         struct sctp_vrf *vrf;
 306         struct sctp_ifa *sctp_ifap = NULL;
 307
 308         SCTP_IPI_ADDR_RLOCK();
 309         vrf = sctp_find_vrf(vrf_id);
 310         if (vrf == NULL) {
 311                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 312                 goto out;
 313
 314         }
 315         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 316         if (sctp_ifap == NULL) {
 317                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 318                 goto out;
 319         }
 320         if (sctp_ifap->ifn_p == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 322                 goto out;
 323         }
 324         if (if_name) {
 325                 int len1, len2;
 326
 327                 len1 = strlen(if_name);
 328                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 329                 if (len1 != len2) {
 330                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 331                             len1, len2);
 332                         goto out;
 333                 }
 334                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 335                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 336                             sctp_ifap->ifn_p->ifn_name,
 337                             if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354 void
 355 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 356     const char *if_name, uint32_t ifn_index)
 357 {
 358         struct sctp_vrf *vrf;
 359         struct sctp_ifa *sctp_ifap = NULL;
 360
 361         SCTP_IPI_ADDR_RLOCK();
 362         vrf = sctp_find_vrf(vrf_id);
 363         if (vrf == NULL) {
 364                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 365                 goto out;
 366
 367         }
 368         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 369         if (sctp_ifap == NULL) {
 370                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 371                 goto out;
 372         }
 373         if (sctp_ifap->ifn_p == NULL) {
 374                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 375                 goto out;
 376         }
 377         if (if_name) {
 378                 int len1, len2;
 379
 380                 len1 = strlen(if_name);
 381                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 382                 if (len1 != len2) {
 383                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 384                             len1, len2);
 385                         goto out;
 386                 }
 387                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 389                             sctp_ifap->ifn_p->ifn_name,
 390                             if_name);
 391                         goto out;
 392                 }
 393         } else {
 394                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 395                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 396                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 397                         goto out;
 398                 }
 399         }
 400
 401         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 402         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 403 out:
 404         SCTP_IPI_ADDR_RUNLOCK();
 405 }
 406
 407 /*-
 408  * Add an ifa to an ifn.
 409  * Register the interface as necessary.
 410  * NOTE: ADDR write lock MUST be held.
 411  */
 412 static void
 413 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 414 {
 415         int ifa_af;
 416
 417         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 418         sctp_ifap->ifn_p = sctp_ifnp;
 419         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 420         /* update address counts */
 421         sctp_ifnp->ifa_count++;
 422         ifa_af = sctp_ifap->address.sa.sa_family;
 423         if (ifa_af == AF_INET)
 424                 sctp_ifnp->num_v4++;
 425         else
 426                 sctp_ifnp->num_v6++;
 427         if (sctp_ifnp->ifa_count == 1) {
 428                 /* register the new interface */
 429                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 430                 sctp_ifnp->registered_af = ifa_af;
 431         }
 432 }
 433
 434 /*-
 435  * Remove an ifa from its ifn.
 436  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 437  * the interface based on the remaining address families left.
 438  * NOTE: ADDR write lock MUST be held.
 439  */
 440 static void
 441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 442 {
 443         uint32_t ifn_index;
 444
 445         LIST_REMOVE(sctp_ifap, next_ifa);
 446         if (sctp_ifap->ifn_p) {
 447                 /* update address counts */
 448                 sctp_ifap->ifn_p->ifa_count--;
 449                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 450                         sctp_ifap->ifn_p->num_v6--;
 451                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 452                         sctp_ifap->ifn_p->num_v4--;
 453
 454                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 455                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 456                         /* remove the ifn, possibly freeing it */
 457                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 458                 } else {
 459                         /* re-register address family type, if needed */
 460                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 461                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 462                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 463                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 464                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 465                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 466                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 467                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 468                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 469                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 470                         }
 471                         /* free the ifn refcount */
 472                         sctp_free_ifn(sctp_ifap->ifn_p);
 473                 }
 474                 sctp_ifap->ifn_p = NULL;
 475         }
 476 }
 477
 478 struct sctp_ifa *
 479 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 480     uint32_t ifn_type, const char *if_name, void *ifa,
 481     struct sockaddr *addr, uint32_t ifa_flags,
 482     int dynamic_add)
 483 {
 484         struct sctp_vrf *vrf;
 485         struct sctp_ifn *sctp_ifnp = NULL;
 486         struct sctp_ifa *sctp_ifap = NULL;
 487         struct sctp_ifalist *hash_addr_head;
 488         struct sctp_ifnlist *hash_ifn_head;
 489         uint32_t hash_of_addr;
 490         int new_ifn_af = 0;
 491
 492 #ifdef SCTP_DEBUG
 493         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 494         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 495 #endif
 496         SCTP_IPI_ADDR_WLOCK();
 497         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 498         if (sctp_ifnp) {
 499                 vrf = sctp_ifnp->vrf;
 500         } else {
 501                 vrf = sctp_find_vrf(vrf_id);
 502                 if (vrf == NULL) {
 503                         vrf = sctp_allocate_vrf(vrf_id);
 504                         if (vrf == NULL) {
 505                                 SCTP_IPI_ADDR_WUNLOCK();
 506                                 return (NULL);
 507                         }
 508                 }
 509         }
 510         if (sctp_ifnp == NULL) {
 511                 /*
 512                  * build one and add it, can't hold lock until after malloc
 513                  * done though.
 514                  */
 515                 SCTP_IPI_ADDR_WUNLOCK();
 516                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 517                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 518                 if (sctp_ifnp == NULL) {
 519 #ifdef INVARIANTS
 520                         panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
 521 #endif
 522                         return (NULL);
 523                 }
 524                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 525                 sctp_ifnp->ifn_index = ifn_index;
 526                 sctp_ifnp->ifn_p = ifn;
 527                 sctp_ifnp->ifn_type = ifn_type;
 528                 sctp_ifnp->refcount = 0;
 529                 sctp_ifnp->vrf = vrf;
 530                 atomic_add_int(&vrf->refcount, 1);
 531                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 532                 if (if_name != NULL) {
 533                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 534                 } else {
 535                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 536                 }
 537                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 538                 LIST_INIT(&sctp_ifnp->ifalist);
 539                 SCTP_IPI_ADDR_WLOCK();
 540                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 541                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 542                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 543                 new_ifn_af = 1;
 544         }
 545         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 546         if (sctp_ifap) {
 547                 /* Hmm, it already exists? */
 548                 if ((sctp_ifap->ifn_p) &&
 549                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 550                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 551                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 552                             sctp_ifap);
 553                         if (new_ifn_af) {
 554                                 /* Remove the created one that we don't want */
 555                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 556                         }
 557                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 558                                 /* easy to solve, just switch back to active */
 559                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 560                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 561                                 sctp_ifap->ifn_p = sctp_ifnp;
 562                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 563                         }
 564         exit_stage_left:
 565                         SCTP_IPI_ADDR_WUNLOCK();
 566                         return (sctp_ifap);
 567                 } else {
 568                         if (sctp_ifap->ifn_p) {
 569                                 /*
 570                                  * The last IFN gets the address, removee
 571                                  * the old one
 572                                  */
 573                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 574                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 575                                     sctp_ifap->ifn_p->ifn_index, if_name,
 576                                     ifn_index);
 577                                 /* remove the address from the old ifn */
 578                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 579                                 /* move the address over to the new ifn */
 580                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 581                                 goto exit_stage_left;
 582                         } else {
 583                                 /* repair ifnp which was NULL ? */
 584                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 586                                     sctp_ifnp, sctp_ifap);
 587                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 588                         }
 589                         goto exit_stage_left;
 590                 }
 591         }
 592         SCTP_IPI_ADDR_WUNLOCK();
 593         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 594         if (sctp_ifap == NULL) {
 595 #ifdef INVARIANTS
 596                 panic("No memory for IFA");
 597 #endif
 598                 return (NULL);
 599         }
 600         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 601         sctp_ifap->ifn_p = sctp_ifnp;
 602         atomic_add_int(&sctp_ifnp->refcount, 1);
 603         sctp_ifap->vrf_id = vrf_id;
 604         sctp_ifap->ifa = ifa;
 605         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 606         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 607         sctp_ifap->flags = ifa_flags;
 608         /* Set scope */
 609         switch (sctp_ifap->address.sa.sa_family) {
 610         case AF_INET:
 611                 {
 612                         struct sockaddr_in *sin;
 613
 614                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 615                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 616                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 617                                 sctp_ifap->src_is_loop = 1;
 618                         }
 619                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 620                                 sctp_ifap->src_is_priv = 1;
 621                         }
 622                         sctp_ifnp->num_v4++;
 623                         if (new_ifn_af)
 624                                 new_ifn_af = AF_INET;
 625                         break;
 626                 }
 627 #ifdef INET6
 628         case AF_INET6:
 629                 {
 630                         /* ok to use deprecated addresses? */
 631                         struct sockaddr_in6 *sin6;
 632
 633                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 634                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 635                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 636                                 sctp_ifap->src_is_loop = 1;
 637                         }
 638                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 639                                 sctp_ifap->src_is_priv = 1;
 640                         }
 641                         sctp_ifnp->num_v6++;
 642                         if (new_ifn_af)
 643                                 new_ifn_af = AF_INET6;
 644                         break;
 645                 }
 646 #endif
 647         default:
 648                 new_ifn_af = 0;
 649                 break;
 650         }
 651         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 652
 653         if ((sctp_ifap->src_is_priv == 0) &&
 654             (sctp_ifap->src_is_loop == 0)) {
 655                 sctp_ifap->src_is_glob = 1;
 656         }
 657         SCTP_IPI_ADDR_WLOCK();
 658         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 659         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 660         sctp_ifap->refcount = 1;
 661         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 662         sctp_ifnp->ifa_count++;
 663         vrf->total_ifa_count++;
 664         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 665         if (new_ifn_af) {
 666                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 667                 sctp_ifnp->registered_af = new_ifn_af;
 668         }
 669         SCTP_IPI_ADDR_WUNLOCK();
 670         if (dynamic_add) {
 671                 /*
 672                  * Bump up the refcount so that when the timer completes it
 673                  * will drop back down.
 674                  */
 675                 struct sctp_laddr *wi;
 676
 677                 atomic_add_int(&sctp_ifap->refcount, 1);
 678                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 679                 if (wi == NULL) {
 680                         /*
 681                          * Gak, what can we do? We have lost an address
 682                          * change can you say HOSED?
 683                          */
 684                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 685                         /* Opps, must decrement the count */
 686                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 687                             if_name);
 688                         return (NULL);
 689                 }
 690                 SCTP_INCR_LADDR_COUNT();
 691                 bzero(wi, sizeof(*wi));
 692                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 693                 wi->ifa = sctp_ifap;
 694                 wi->action = SCTP_ADD_IP_ADDRESS;
 695
 696                 SCTP_WQ_ADDR_LOCK();
 697                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 698                 SCTP_WQ_ADDR_UNLOCK();
 699
 700                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 701                     (struct sctp_inpcb *)NULL,
 702                     (struct sctp_tcb *)NULL,
 703                     (struct sctp_nets *)NULL);
 704         } else {
 705                 /* it's ready for use */
 706                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 707         }
 708         return (sctp_ifap);
 709 }
 710
 711 void
 712 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 713     uint32_t ifn_index, const char *if_name)
 714 {
 715         struct sctp_vrf *vrf;
 716         struct sctp_ifa *sctp_ifap = NULL;
 717
 718         SCTP_IPI_ADDR_WLOCK();
 719         vrf = sctp_find_vrf(vrf_id);
 720         if (vrf == NULL) {
 721                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 722                 goto out_now;
 723         }
 724 #ifdef SCTP_DEBUG
 725         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 726         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 727 #endif
 728         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 729         if (sctp_ifap) {
 730                 /* Validate the delete */
 731                 if (sctp_ifap->ifn_p) {
 732                         int valid = 0;
 733
 734                         /*-
 735                          * The name has priority over the ifn_index
 736                          * if its given. We do this especially for
 737                          * panda who might recycle indexes fast.
 738                          */
 739                         if (if_name) {
 740                                 int len1, len2;
 741
 742                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 743                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 744                                 if (len1 && len2 && (len1 == len2)) {
 745                                         /* we can compare them */
 746                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 747                                                 /*
 748                                                  * They match its a correct
 749                                                  * delete
 750                                                  */
 751                                                 valid = 1;
 752                                         }
 753                                 }
 754                         }
 755                         if (!valid) {
 756                                 /* last ditch check ifn_index */
 757                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 758                                         valid = 1;
 759                                 }
 760                         }
 761                         if (!valid) {
 762                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 763                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 764                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 765                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 766                                 SCTP_IPI_ADDR_WUNLOCK();
 767                                 return;
 768                         }
 769                 }
 770                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 771                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 772                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 773                 vrf->total_ifa_count--;
 774                 LIST_REMOVE(sctp_ifap, next_bucket);
 775                 sctp_remove_ifa_from_ifn(sctp_ifap);
 776         }
 777 #ifdef SCTP_DEBUG
 778         else {
 779                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 780                     ifn_index);
 781                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 782         }
 783 #endif
 784
 785 out_now:
 786         SCTP_IPI_ADDR_WUNLOCK();
 787         if (sctp_ifap) {
 788                 struct sctp_laddr *wi;
 789
 790                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 791                 if (wi == NULL) {
 792                         /*
 793                          * Gak, what can we do? We have lost an address
 794                          * change can you say HOSED?
 795                          */
 796                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 797
 798                         /* Oops, must decrement the count */
 799                         sctp_free_ifa(sctp_ifap);
 800                         return;
 801                 }
 802                 SCTP_INCR_LADDR_COUNT();
 803                 bzero(wi, sizeof(*wi));
 804                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 805                 wi->ifa = sctp_ifap;
 806                 wi->action = SCTP_DEL_IP_ADDRESS;
 807                 SCTP_WQ_ADDR_LOCK();
 808                 /*
 809                  * Should this really be a tailq? As it is we will process
 810                  * the newest first :-0
 811                  */
 812                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 813                 SCTP_WQ_ADDR_UNLOCK();
 814
 815                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 816                     (struct sctp_inpcb *)NULL,
 817                     (struct sctp_tcb *)NULL,
 818                     (struct sctp_nets *)NULL);
 819         }
 820         return;
 821 }
 822
 823
 824 static struct sctp_tcb *
 825 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 826     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 827 {
 828         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 829         /*
 830          * If we support the TCP model, then we must now dig through to see
 831          * if we can find our endpoint in the list of tcp ep's.
 832          */
 833         uint16_t lport, rport;
 834         struct sctppcbhead *ephead;
 835         struct sctp_inpcb *inp;
 836         struct sctp_laddr *laddr;
 837         struct sctp_tcb *stcb;
 838         struct sctp_nets *net;
 839
 840         if ((to == NULL) || (from == NULL)) {
 841                 return (NULL);
 842         }
 843         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 844                 lport = ((struct sockaddr_in *)to)->sin_port;
 845                 rport = ((struct sockaddr_in *)from)->sin_port;
 846         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 847                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 848                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 849         } else {
 850                 return NULL;
 851         }
 852         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
 853         /*
 854          * Ok now for each of the guys in this bucket we must look and see:
 855          * - Does the remote port match. - Does there single association's
 856          * addresses match this address (to). If so we update p_ep to point
 857          * to this ep and return the tcb from it.
 858          */
 859         LIST_FOREACH(inp, ephead, sctp_hash) {
 860                 SCTP_INP_RLOCK(inp);
 861                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 862                         SCTP_INP_RUNLOCK(inp);
 863                         continue;
 864                 }
 865                 if (lport != inp->sctp_lport) {
 866                         SCTP_INP_RUNLOCK(inp);
 867                         continue;
 868                 }
 869                 if (inp->def_vrf_id != vrf_id) {
 870                         SCTP_INP_RUNLOCK(inp);
 871                         continue;
 872                 }
 873                 /* check to see if the ep has one of the addresses */
 874                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 875                         /* We are NOT bound all, so look further */
 876                         int match = 0;
 877
 878                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 879
 880                                 if (laddr->ifa == NULL) {
 881                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 882                                         continue;
 883                                 }
 884                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 885                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 886                                         continue;
 887                                 }
 888                                 if (laddr->ifa->address.sa.sa_family ==
 889                                     to->sa_family) {
 890                                         /* see if it matches */
 891                                         struct sockaddr_in *intf_addr, *sin;
 892
 893                                         intf_addr = &laddr->ifa->address.sin;
 894                                         sin = (struct sockaddr_in *)to;
 895                                         if (from->sa_family == AF_INET) {
 896                                                 if (sin->sin_addr.s_addr ==
 897                                                     intf_addr->sin_addr.s_addr) {
 898                                                         match = 1;
 899                                                         break;
 900                                                 }
 901                                         }
 902 #ifdef INET6
 903                                         if (from->sa_family == AF_INET6) {
 904                                                 struct sockaddr_in6 *intf_addr6;
 905                                                 struct sockaddr_in6 *sin6;
 906
 907                                                 sin6 = (struct sockaddr_in6 *)
 908                                                     to;
 909                                                 intf_addr6 = &laddr->ifa->address.sin6;
 910
 911                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 912                                                     intf_addr6)) {
 913                                                         match = 1;
 914                                                         break;
 915                                                 }
 916                                         }
 917 #endif
 918                                 }
 919                         }
 920                         if (match == 0) {
 921                                 /* This endpoint does not have this address */
 922                                 SCTP_INP_RUNLOCK(inp);
 923                                 continue;
 924                         }
 925                 }
 926                 /*
 927                  * Ok if we hit here the ep has the address, does it hold
 928                  * the tcb?
 929                  */
 930
 931                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 932                 if (stcb == NULL) {
 933                         SCTP_INP_RUNLOCK(inp);
 934                         continue;
 935                 }
 936                 SCTP_TCB_LOCK(stcb);
 937                 if (stcb->rport != rport) {
 938                         /* remote port does not match. */
 939                         SCTP_TCB_UNLOCK(stcb);
 940                         SCTP_INP_RUNLOCK(inp);
 941                         continue;
 942                 }
 943                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 944                         SCTP_TCB_UNLOCK(stcb);
 945                         SCTP_INP_RUNLOCK(inp);
 946                         continue;
 947                 }
 948                 /* Does this TCB have a matching address? */
 949                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 950
 951                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 952                                 /* not the same family, can't be a match */
 953                                 continue;
 954                         }
 955                         switch (from->sa_family) {
 956                         case AF_INET:
 957                                 {
 958                                         struct sockaddr_in *sin, *rsin;
 959
 960                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 961                                         rsin = (struct sockaddr_in *)from;
 962                                         if (sin->sin_addr.s_addr ==
 963                                             rsin->sin_addr.s_addr) {
 964                                                 /* found it */
 965                                                 if (netp != NULL) {
 966                                                         *netp = net;
 967                                                 }
 968                                                 /*
 969                                                  * Update the endpoint
 970                                                  * pointer
 971                                                  */
 972                                                 *inp_p = inp;
 973                                                 SCTP_INP_RUNLOCK(inp);
 974                                                 return (stcb);
 975                                         }
 976                                         break;
 977                                 }
 978 #ifdef INET6
 979                         case AF_INET6:
 980                                 {
 981                                         struct sockaddr_in6 *sin6, *rsin6;
 982
 983                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 984                                         rsin6 = (struct sockaddr_in6 *)from;
 985                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 986                                             rsin6)) {
 987                                                 /* found it */
 988                                                 if (netp != NULL) {
 989                                                         *netp = net;
 990                                                 }
 991                                                 /*
 992                                                  * Update the endpoint
 993                                                  * pointer
 994                                                  */
 995                                                 *inp_p = inp;
 996                                                 SCTP_INP_RUNLOCK(inp);
 997                                                 return (stcb);
 998                                         }
 999                                         break;
1000                                 }
1001 #endif
1002                         default:
1003                                 /* TSNH */
1004                                 break;
1005                         }
1006                 }
1007                 SCTP_TCB_UNLOCK(stcb);
1008                 SCTP_INP_RUNLOCK(inp);
1009         }
1010         return (NULL);
1011 }
1012
1013 static int
1014 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1015 {
1016         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1017         int ipv4_addr_legal, ipv6_addr_legal;
1018         struct sctp_vrf *vrf;
1019         struct sctp_ifn *sctp_ifn;
1020         struct sctp_ifa *sctp_ifa;
1021
1022         loopback_scope = stcb->asoc.loopback_scope;
1023         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1024         local_scope = stcb->asoc.local_scope;
1025         site_scope = stcb->asoc.site_scope;
1026         ipv4_addr_legal = ipv6_addr_legal = 0;
1027         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1028                 ipv6_addr_legal = 1;
1029                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1030                         ipv4_addr_legal = 1;
1031                 }
1032         } else {
1033                 ipv4_addr_legal = 1;
1034         }
1035
1036         SCTP_IPI_ADDR_RLOCK();
1037         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1038         if (vrf == NULL) {
1039                 /* no vrf, no addresses */
1040                 SCTP_IPI_ADDR_RUNLOCK();
1041                 return (0);
1042         }
1043         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1044                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1045                         if ((loopback_scope == 0) &&
1046                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1047                                 continue;
1048                         }
1049                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1050                                 if (sctp_is_addr_restricted(stcb, sctp_ifa))
1051                                         continue;
1052                                 switch (sctp_ifa->address.sa.sa_family) {
1053 #ifdef INET
1054                                 case AF_INET:
1055                                         if (ipv4_addr_legal) {
1056                                                 struct sockaddr_in *sin,
1057                                                            *rsin;
1058
1059                                                 sin = &sctp_ifa->address.sin;
1060                                                 rsin = (struct sockaddr_in *)to;
1061                                                 if ((ipv4_local_scope == 0) &&
1062                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1063                                                         continue;
1064                                                 }
1065                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1066                                                         SCTP_IPI_ADDR_RUNLOCK();
1067                                                         return (1);
1068                                                 }
1069                                         }
1070                                         break;
1071 #endif
1072 #ifdef INET6
1073                                 case AF_INET6:
1074                                         if (ipv6_addr_legal) {
1075                                                 struct sockaddr_in6 *sin6,
1076                                                             *rsin6;
1077
1078                                                 sin6 = &sctp_ifa->address.sin6;
1079                                                 rsin6 = (struct sockaddr_in6 *)to;
1080                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1081                                                         if (local_scope == 0)
1082                                                                 continue;
1083                                                         if (sin6->sin6_scope_id == 0) {
1084                                                                 if (sa6_recoverscope(sin6) != 0)
1085                                                                         continue;
1086                                                         }
1087                                                 }
1088                                                 if ((site_scope == 0) &&
1089                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1090                                                         continue;
1091                                                 }
1092                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1093                                                         SCTP_IPI_ADDR_RUNLOCK();
1094                                                         return (1);
1095                                                 }
1096                                         }
1097                                         break;
1098 #endif
1099                                 default:
1100                                         /* TSNH */
1101                                         break;
1102                                 }
1103                         }
1104                 }
1105         } else {
1106                 struct sctp_laddr *laddr;
1107
1108                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1109                         if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
1110                                 continue;
1111                         }
1112                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1113                                 continue;
1114                         }
1115                         switch (to->sa_family) {
1116 #ifdef INET
1117                         case AF_INET:
1118                                 {
1119                                         struct sockaddr_in *sin, *rsin;
1120
1121                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1122                                         rsin = (struct sockaddr_in *)to;
1123                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1124                                                 SCTP_IPI_ADDR_RUNLOCK();
1125                                                 return (1);
1126                                         }
1127                                         break;
1128                                 }
1129 #endif
1130 #ifdef INET6
1131                         case AF_INET6:
1132                                 {
1133                                         struct sockaddr_in6 *sin6, *rsin6;
1134
1135                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1136                                         rsin6 = (struct sockaddr_in6 *)to;
1137                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1138                                                 SCTP_IPI_ADDR_RUNLOCK();
1139                                                 return (1);
1140                                         }
1141                                         break;
1142                                 }
1143
1144 #endif
1145                         default:
1146                                 /* TSNH */
1147                                 break;
1148                         }
1149
1150                 }
1151         }
1152         SCTP_IPI_ADDR_RUNLOCK();
1153         return (0);
1154 }
1155
1156 /*
1157  * rules for use
1158  *
1159  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1160  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1161  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1162  * NULL.
1163  */
1164
1165 struct sctp_tcb *
1166 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1167     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1168 {
1169         struct sctpasochead *head;
1170         struct sctp_inpcb *inp;
1171         struct sctp_tcb *stcb = NULL;
1172         struct sctp_nets *net;
1173         uint16_t rport;
1174
1175         inp = *inp_p;
1176         if (remote->sa_family == AF_INET) {
1177                 rport = (((struct sockaddr_in *)remote)->sin_port);
1178         } else if (remote->sa_family == AF_INET6) {
1179                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1180         } else {
1181                 return (NULL);
1182         }
1183         if (locked_tcb) {
1184                 /*
1185                  * UN-lock so we can do proper locking here this occurs when
1186                  * called from load_addresses_from_init.
1187                  */
1188                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1189                 SCTP_TCB_UNLOCK(locked_tcb);
1190         }
1191         SCTP_INP_INFO_RLOCK();
1192         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1193                 /*-
1194                  * Now either this guy is our listener or it's the
1195                  * connector. If it is the one that issued the connect, then
1196                  * it's only chance is to be the first TCB in the list. If
1197                  * it is the acceptor, then do the special_lookup to hash
1198                  * and find the real inp.
1199                  */
1200                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1201                         /* to is peer addr, from is my addr */
1202                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1203                             netp, inp->def_vrf_id);
1204                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1205                                 /* we have a locked tcb, lower refcount */
1206                                 SCTP_INP_DECR_REF(inp);
1207                         }
1208                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1209                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1210                                 SCTP_TCB_LOCK(locked_tcb);
1211                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1212                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1213                         }
1214                         SCTP_INP_INFO_RUNLOCK();
1215                         return (stcb);
1216                 } else {
1217                         SCTP_INP_WLOCK(inp);
1218                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1219                                 goto null_return;
1220                         }
1221                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1222                         if (stcb == NULL) {
1223                                 goto null_return;
1224                         }
1225                         SCTP_TCB_LOCK(stcb);
1226
1227                         if (stcb->rport != rport) {
1228                                 /* remote port does not match. */
1229                                 SCTP_TCB_UNLOCK(stcb);
1230                                 goto null_return;
1231                         }
1232                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1233                                 SCTP_TCB_UNLOCK(stcb);
1234                                 goto null_return;
1235                         }
1236                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1237                                 SCTP_TCB_UNLOCK(stcb);
1238                                 goto null_return;
1239                         }
1240                         /* now look at the list of remote addresses */
1241                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1242 #ifdef INVARIANTS
1243                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1244                                         panic("Corrupt net list");
1245                                 }
1246 #endif
1247                                 if (net->ro._l_addr.sa.sa_family !=
1248                                     remote->sa_family) {
1249                                         /* not the same family */
1250                                         continue;
1251                                 }
1252                                 switch (remote->sa_family) {
1253                                 case AF_INET:
1254                                         {
1255                                                 struct sockaddr_in *sin,
1256                                                            *rsin;
1257
1258                                                 sin = (struct sockaddr_in *)
1259                                                     &net->ro._l_addr;
1260                                                 rsin = (struct sockaddr_in *)remote;
1261                                                 if (sin->sin_addr.s_addr ==
1262                                                     rsin->sin_addr.s_addr) {
1263                                                         /* found it */
1264                                                         if (netp != NULL) {
1265                                                                 *netp = net;
1266                                                         }
1267                                                         if (locked_tcb == NULL) {
1268                                                                 SCTP_INP_DECR_REF(inp);
1269                                                         } else if (locked_tcb != stcb) {
1270                                                                 SCTP_TCB_LOCK(locked_tcb);
1271                                                         }
1272                                                         if (locked_tcb) {
1273                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1274                                                         }
1275                                                         SCTP_INP_WUNLOCK(inp);
1276                                                         SCTP_INP_INFO_RUNLOCK();
1277                                                         return (stcb);
1278                                                 }
1279                                                 break;
1280                                         }
1281 #ifdef INET6
1282                                 case AF_INET6:
1283                                         {
1284                                                 struct sockaddr_in6 *sin6,
1285                                                             *rsin6;
1286
1287                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1288                                                 rsin6 = (struct sockaddr_in6 *)remote;
1289                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1290                                                     rsin6)) {
1291                                                         /* found it */
1292                                                         if (netp != NULL) {
1293                                                                 *netp = net;
1294                                                         }
1295                                                         if (locked_tcb == NULL) {
1296                                                                 SCTP_INP_DECR_REF(inp);
1297                                                         } else if (locked_tcb != stcb) {
1298                                                                 SCTP_TCB_LOCK(locked_tcb);
1299                                                         }
1300                                                         if (locked_tcb) {
1301                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1302                                                         }
1303                                                         SCTP_INP_WUNLOCK(inp);
1304                                                         SCTP_INP_INFO_RUNLOCK();
1305                                                         return (stcb);
1306                                                 }
1307                                                 break;
1308                                         }
1309 #endif
1310                                 default:
1311                                         /* TSNH */
1312                                         break;
1313                                 }
1314                         }
1315                         SCTP_TCB_UNLOCK(stcb);
1316                 }
1317         } else {
1318                 SCTP_INP_WLOCK(inp);
1319                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1320                         goto null_return;
1321                 }
1322                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1323                     inp->sctp_hashmark)];
1324                 if (head == NULL) {
1325                         goto null_return;
1326                 }
1327                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1328                         if (stcb->rport != rport) {
1329                                 /* remote port does not match */
1330                                 continue;
1331                         }
1332                         SCTP_TCB_LOCK(stcb);
1333                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1334                                 SCTP_TCB_UNLOCK(stcb);
1335                                 continue;
1336                         }
1337                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1338                                 SCTP_TCB_UNLOCK(stcb);
1339                                 continue;
1340                         }
1341                         /* now look at the list of remote addresses */
1342                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1343 #ifdef INVARIANTS
1344                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1345                                         panic("Corrupt net list");
1346                                 }
1347 #endif
1348                                 if (net->ro._l_addr.sa.sa_family !=
1349                                     remote->sa_family) {
1350                                         /* not the same family */
1351                                         continue;
1352                                 }
1353                                 switch (remote->sa_family) {
1354                                 case AF_INET:
1355                                         {
1356                                                 struct sockaddr_in *sin,
1357                                                            *rsin;
1358
1359                                                 sin = (struct sockaddr_in *)
1360                                                     &net->ro._l_addr;
1361                                                 rsin = (struct sockaddr_in *)remote;
1362                                                 if (sin->sin_addr.s_addr ==
1363                                                     rsin->sin_addr.s_addr) {
1364                                                         /* found it */
1365                                                         if (netp != NULL) {
1366                                                                 *netp = net;
1367                                                         }
1368                                                         if (locked_tcb == NULL) {
1369                                                                 SCTP_INP_DECR_REF(inp);
1370                                                         } else if (locked_tcb != stcb) {
1371                                                                 SCTP_TCB_LOCK(locked_tcb);
1372                                                         }
1373                                                         if (locked_tcb) {
1374                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1375                                                         }
1376                                                         SCTP_INP_WUNLOCK(inp);
1377                                                         SCTP_INP_INFO_RUNLOCK();
1378                                                         return (stcb);
1379                                                 }
1380                                                 break;
1381                                         }
1382 #ifdef INET6
1383                                 case AF_INET6:
1384                                         {
1385                                                 struct sockaddr_in6 *sin6,
1386                                                             *rsin6;
1387
1388                                                 sin6 = (struct sockaddr_in6 *)
1389                                                     &net->ro._l_addr;
1390                                                 rsin6 = (struct sockaddr_in6 *)remote;
1391                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1392                                                     rsin6)) {
1393                                                         /* found it */
1394                                                         if (netp != NULL) {
1395                                                                 *netp = net;
1396                                                         }
1397                                                         if (locked_tcb == NULL) {
1398                                                                 SCTP_INP_DECR_REF(inp);
1399                                                         } else if (locked_tcb != stcb) {
1400                                                                 SCTP_TCB_LOCK(locked_tcb);
1401                                                         }
1402                                                         if (locked_tcb) {
1403                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1404                                                         }
1405                                                         SCTP_INP_WUNLOCK(inp);
1406                                                         SCTP_INP_INFO_RUNLOCK();
1407                                                         return (stcb);
1408                                                 }
1409                                                 break;
1410                                         }
1411 #endif
1412                                 default:
1413                                         /* TSNH */
1414                                         break;
1415                                 }
1416                         }
1417                         SCTP_TCB_UNLOCK(stcb);
1418                 }
1419         }
1420 null_return:
1421         /* clean up for returning null */
1422         if (locked_tcb) {
1423                 SCTP_TCB_LOCK(locked_tcb);
1424                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1425         }
1426         SCTP_INP_WUNLOCK(inp);
1427         SCTP_INP_INFO_RUNLOCK();
1428         /* not found */
1429         return (NULL);
1430 }
1431
1432 /*
1433  * Find an association for a specific endpoint using the association id given
1434  * out in the COMM_UP notification
1435  */
1436
1437 struct sctp_tcb *
1438 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1439 {
1440         /*
1441          * Use my the assoc_id to find a endpoint
1442          */
1443         struct sctpasochead *head;
1444         struct sctp_tcb *stcb;
1445         uint32_t id;
1446
1447         if (inp == NULL) {
1448                 SCTP_PRINTF("TSNH ep_associd\n");
1449                 return (NULL);
1450         }
1451         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1452                 SCTP_PRINTF("TSNH ep_associd0\n");
1453                 return (NULL);
1454         }
1455         id = (uint32_t) asoc_id;
1456         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1457         if (head == NULL) {
1458                 /* invalid id TSNH */
1459                 SCTP_PRINTF("TSNH ep_associd1\n");
1460                 return (NULL);
1461         }
1462         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1463                 if (stcb->asoc.assoc_id == id) {
1464                         if (inp != stcb->sctp_ep) {
1465                                 /*
1466                                  * some other guy has the same id active (id
1467                                  * collision ??).
1468                                  */
1469                                 SCTP_PRINTF("TSNH ep_associd2\n");
1470                                 continue;
1471                         }
1472                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1473                                 continue;
1474                         }
1475                         if (want_lock) {
1476                                 SCTP_TCB_LOCK(stcb);
1477                         }
1478                         return (stcb);
1479                 }
1480         }
1481         return (NULL);
1482 }
1483
1484
1485 struct sctp_tcb *
1486 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1487 {
1488         struct sctp_tcb *stcb;
1489
1490         SCTP_INP_RLOCK(inp);
1491         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1492         SCTP_INP_RUNLOCK(inp);
1493         return (stcb);
1494 }
1495
1496
1497 static struct sctp_inpcb *
1498 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1499     uint16_t lport, uint32_t vrf_id)
1500 {
1501         struct sctp_inpcb *inp;
1502         struct sockaddr_in *sin;
1503
1504 #ifdef INET6
1505         struct sockaddr_in6 *sin6;
1506
1507 #endif
1508         struct sctp_laddr *laddr;
1509
1510 #ifdef INET6
1511         struct sockaddr_in6 *intf_addr6;
1512
1513 #endif
1514
1515         int fnd;
1516
1517         /*
1518          * Endpoing probe expects that the INP_INFO is locked.
1519          */
1520         sin = NULL;
1521 #ifdef INET6
1522         sin6 = NULL;
1523 #endif
1524         switch (nam->sa_family) {
1525         case AF_INET:
1526                 sin = (struct sockaddr_in *)nam;
1527                 break;
1528 #ifdef INET6
1529         case AF_INET6:
1530                 sin6 = (struct sockaddr_in6 *)nam;
1531                 break;
1532 #endif
1533         default:
1534                 /* unsupported family */
1535                 return (NULL);
1536         }
1537
1538         if (head == NULL)
1539                 return (NULL);
1540
1541         LIST_FOREACH(inp, head, sctp_hash) {
1542                 SCTP_INP_RLOCK(inp);
1543                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1544                         SCTP_INP_RUNLOCK(inp);
1545                         continue;
1546                 }
1547                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1548                     (inp->sctp_lport == lport)) {
1549                         /* got it */
1550                         if ((nam->sa_family == AF_INET) &&
1551                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1552                             SCTP_IPV6_V6ONLY(inp)) {
1553                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1554                                 SCTP_INP_RUNLOCK(inp);
1555                                 continue;
1556                         }
1557                         /* A V6 address and the endpoint is NOT bound V6 */
1558                         if (nam->sa_family == AF_INET6 &&
1559                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1560                                 SCTP_INP_RUNLOCK(inp);
1561                                 continue;
1562                         }
1563                         /* does a VRF id match? */
1564                         fnd = 0;
1565                         if (inp->def_vrf_id == vrf_id)
1566                                 fnd = 1;
1567
1568                         SCTP_INP_RUNLOCK(inp);
1569                         if (!fnd)
1570                                 continue;
1571                         return (inp);
1572                 }
1573                 SCTP_INP_RUNLOCK(inp);
1574         }
1575         if ((nam->sa_family == AF_INET) &&
1576             (sin->sin_addr.s_addr == INADDR_ANY)) {
1577                 /* Can't hunt for one that has no address specified */
1578                 return (NULL);
1579         }
1580 #ifdef INET6
1581         if ((nam->sa_family == AF_INET6) &&
1582             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1583                 /* Can't hunt for one that has no address specified */
1584                 return (NULL);
1585         }
1586 #endif
1587         /*
1588          * ok, not bound to all so see if we can find a EP bound to this
1589          * address.
1590          */
1591         LIST_FOREACH(inp, head, sctp_hash) {
1592                 SCTP_INP_RLOCK(inp);
1593                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1594                         SCTP_INP_RUNLOCK(inp);
1595                         continue;
1596                 }
1597                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1598                         SCTP_INP_RUNLOCK(inp);
1599                         continue;
1600                 }
1601                 /*
1602                  * Ok this could be a likely candidate, look at all of its
1603                  * addresses
1604                  */
1605                 if (inp->sctp_lport != lport) {
1606                         SCTP_INP_RUNLOCK(inp);
1607                         continue;
1608                 }
1609                 /* does a VRF id match? */
1610                 fnd = 0;
1611                 if (inp->def_vrf_id == vrf_id)
1612                         fnd = 1;
1613
1614                 if (!fnd) {
1615                         SCTP_INP_RUNLOCK(inp);
1616                         continue;
1617                 }
1618                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1619                         if (laddr->ifa == NULL) {
1620                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1621                                     __FUNCTION__);
1622                                 continue;
1623                         }
1624                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1625                             laddr->ifa);
1626                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1627                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1628                                 continue;
1629                         }
1630                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1631                                 /* possible, see if it matches */
1632                                 struct sockaddr_in *intf_addr;
1633
1634                                 intf_addr = &laddr->ifa->address.sin;
1635                                 switch (nam->sa_family) {
1636                                 case AF_INET:
1637                                         if (sin->sin_addr.s_addr ==
1638                                             intf_addr->sin_addr.s_addr) {
1639                                                 SCTP_INP_RUNLOCK(inp);
1640                                                 return (inp);
1641                                         }
1642                                         break;
1643 #ifdef INET6
1644                                 case AF_INET6:
1645                                         intf_addr6 = &laddr->ifa->address.sin6;
1646                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1647                                             intf_addr6)) {
1648                                                 SCTP_INP_RUNLOCK(inp);
1649                                                 return (inp);
1650                                         }
1651                                         break;
1652 #endif
1653                                 }
1654                         }
1655                 }
1656                 SCTP_INP_RUNLOCK(inp);
1657         }
1658         return (NULL);
1659 }
1660
1661
1662 static struct sctp_inpcb *
1663 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1664 {
1665         struct sctppcbhead *head;
1666         struct sctp_inpcb *t_inp;
1667         int fnd;
1668
1669         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1670             SCTP_BASE_INFO(hashmark))];
1671         LIST_FOREACH(t_inp, head, sctp_hash) {
1672                 if (t_inp->sctp_lport != lport) {
1673                         continue;
1674                 }
1675                 /* is it in the VRF in question */
1676                 fnd = 0;
1677                 if (t_inp->def_vrf_id == vrf_id)
1678                         fnd = 1;
1679                 if (!fnd)
1680                         continue;
1681
1682                 /* This one is in use. */
1683                 /* check the v6/v4 binding issue */
1684                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1685                     SCTP_IPV6_V6ONLY(t_inp)) {
1686                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1687                                 /* collision in V6 space */
1688                                 return (t_inp);
1689                         } else {
1690                                 /* inp is BOUND_V4 no conflict */
1691                                 continue;
1692                         }
1693                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1694                         /* t_inp is bound v4 and v6, conflict always */
1695                         return (t_inp);
1696                 } else {
1697                         /* t_inp is bound only V4 */
1698                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1699                             SCTP_IPV6_V6ONLY(inp)) {
1700                                 /* no conflict */
1701                                 continue;
1702                         }
1703                         /* else fall through to conflict */
1704                 }
1705                 return (t_inp);
1706         }
1707         return (NULL);
1708 }
1709
1710
1711 int
1712 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1713 {
1714         /* For 1-2-1 with port reuse */
1715         struct sctppcbhead *head;
1716         struct sctp_inpcb *tinp;
1717
1718         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1719                 /* only works with port reuse on */
1720                 return (-1);
1721         }
1722         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1723                 return (0);
1724         }
1725         SCTP_INP_RUNLOCK(inp);
1726         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1727             SCTP_BASE_INFO(hashmark))];
1728         /* Kick out all non-listeners to the TCP hash */
1729         LIST_FOREACH(tinp, head, sctp_hash) {
1730                 if (tinp->sctp_lport != inp->sctp_lport) {
1731                         continue;
1732                 }
1733                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1734                         continue;
1735                 }
1736                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1737                         continue;
1738                 }
1739                 if (tinp->sctp_socket->so_qlimit) {
1740                         continue;
1741                 }
1742                 SCTP_INP_WLOCK(tinp);
1743                 LIST_REMOVE(tinp, sctp_hash);
1744                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1745                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1746                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1747                 SCTP_INP_WUNLOCK(tinp);
1748         }
1749         SCTP_INP_WLOCK(inp);
1750         /* Pull from where he was */
1751         LIST_REMOVE(inp, sctp_hash);
1752         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1753         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1754         LIST_INSERT_HEAD(head, inp, sctp_hash);
1755         SCTP_INP_WUNLOCK(inp);
1756         SCTP_INP_RLOCK(inp);
1757         return (0);
1758 }
1759
1760
1761 struct sctp_inpcb *
1762 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1763     uint32_t vrf_id)
1764 {
1765         /*
1766          * First we check the hash table to see if someone has this port
1767          * bound with just the port.
1768          */
1769         struct sctp_inpcb *inp;
1770         struct sctppcbhead *head;
1771         struct sockaddr_in *sin;
1772         struct sockaddr_in6 *sin6;
1773         int lport;
1774
1775         if (nam->sa_family == AF_INET) {
1776                 sin = (struct sockaddr_in *)nam;
1777                 lport = ((struct sockaddr_in *)nam)->sin_port;
1778         } else if (nam->sa_family == AF_INET6) {
1779                 sin6 = (struct sockaddr_in6 *)nam;
1780                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1781         } else {
1782                 /* unsupported family */
1783                 return (NULL);
1784         }
1785         /*
1786          * I could cheat here and just cast to one of the types but we will
1787          * do it right. It also provides the check against an Unsupported
1788          * type too.
1789          */
1790         /* Find the head of the ALLADDR chain */
1791         if (have_lock == 0) {
1792                 SCTP_INP_INFO_RLOCK();
1793         }
1794         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1795             SCTP_BASE_INFO(hashmark))];
1796         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1797
1798         /*
1799          * If the TCP model exists it could be that the main listening
1800          * endpoint is gone but there exists a connected socket for this guy
1801          * yet. If so we can return the first one that we find. This may NOT
1802          * be the correct one so the caller should be wary on the return
1803          * INP. Currently the onlyc caller that sets this flag is in bindx
1804          * where we are verifying that a user CAN bind the address. He
1805          * either has bound it already, or someone else has, or its open to
1806          * bind, so this is good enough.
1807          */
1808         if (inp == NULL && find_tcp_pool) {
1809                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
1810                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1811         }
1812         if (inp) {
1813                 SCTP_INP_INCR_REF(inp);
1814         }
1815         if (have_lock == 0) {
1816                 SCTP_INP_INFO_RUNLOCK();
1817         }
1818         return (inp);
1819 }
1820
1821 /*
1822  * Find an association for an endpoint with the pointer to whom you want to
1823  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1824  * need to change the *to to some other struct like a mbuf...
1825  */
1826 struct sctp_tcb *
1827 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1828     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1829     uint32_t vrf_id)
1830 {
1831         struct sctp_inpcb *inp = NULL;
1832         struct sctp_tcb *retval;
1833
1834         SCTP_INP_INFO_RLOCK();
1835         if (find_tcp_pool) {
1836                 if (inp_p != NULL) {
1837                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1838                             vrf_id);
1839                 } else {
1840                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1841                             vrf_id);
1842                 }
1843                 if (retval != NULL) {
1844                         SCTP_INP_INFO_RUNLOCK();
1845                         return (retval);
1846                 }
1847         }
1848         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1849         if (inp_p != NULL) {
1850                 *inp_p = inp;
1851         }
1852         SCTP_INP_INFO_RUNLOCK();
1853
1854         if (inp == NULL) {
1855                 return (NULL);
1856         }
1857         /*
1858          * ok, we have an endpoint, now lets find the assoc for it (if any)
1859          * we now place the source address or from in the to of the find
1860          * endpoint call. Since in reality this chain is used from the
1861          * inbound packet side.
1862          */
1863         if (inp_p != NULL) {
1864                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1865                     NULL);
1866         } else {
1867                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1868                     NULL);
1869         }
1870         return retval;
1871 }
1872
1873
1874 /*
1875  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1876  * find all addresses that the sender has specified in any address list. Each
1877  * address will be used to lookup the TCB and see if one exits.
1878  */
1879 static struct sctp_tcb *
1880 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1881     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1882     struct sockaddr *dest)
1883 {
1884         struct sockaddr_in sin4;
1885         struct sockaddr_in6 sin6;
1886         struct sctp_paramhdr *phdr, parm_buf;
1887         struct sctp_tcb *retval;
1888         uint32_t ptype, plen;
1889
1890         memset(&sin4, 0, sizeof(sin4));
1891         memset(&sin6, 0, sizeof(sin6));
1892         sin4.sin_len = sizeof(sin4);
1893         sin4.sin_family = AF_INET;
1894         sin4.sin_port = sh->src_port;
1895         sin6.sin6_len = sizeof(sin6);
1896         sin6.sin6_family = AF_INET6;
1897         sin6.sin6_port = sh->src_port;
1898
1899         retval = NULL;
1900         offset += sizeof(struct sctp_init_chunk);
1901
1902         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1903         while (phdr != NULL) {
1904                 /* now we must see if we want the parameter */
1905                 ptype = ntohs(phdr->param_type);
1906                 plen = ntohs(phdr->param_length);
1907                 if (plen == 0) {
1908                         break;
1909                 }
1910                 if (ptype == SCTP_IPV4_ADDRESS &&
1911                     plen == sizeof(struct sctp_ipv4addr_param)) {
1912                         /* Get the rest of the address */
1913                         struct sctp_ipv4addr_param ip4_parm, *p4;
1914
1915                         phdr = sctp_get_next_param(m, offset,
1916                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1917                         if (phdr == NULL) {
1918                                 return (NULL);
1919                         }
1920                         p4 = (struct sctp_ipv4addr_param *)phdr;
1921                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1922                         /* look it up */
1923                         retval = sctp_findassociation_ep_addr(inp_p,
1924                             (struct sockaddr *)&sin4, netp, dest, NULL);
1925                         if (retval != NULL) {
1926                                 return (retval);
1927                         }
1928                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1929                     plen == sizeof(struct sctp_ipv6addr_param)) {
1930                         /* Get the rest of the address */
1931                         struct sctp_ipv6addr_param ip6_parm, *p6;
1932
1933                         phdr = sctp_get_next_param(m, offset,
1934                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1935                         if (phdr == NULL) {
1936                                 return (NULL);
1937                         }
1938                         p6 = (struct sctp_ipv6addr_param *)phdr;
1939                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1940                         /* look it up */
1941                         retval = sctp_findassociation_ep_addr(inp_p,
1942                             (struct sockaddr *)&sin6, netp, dest, NULL);
1943                         if (retval != NULL) {
1944                                 return (retval);
1945                         }
1946                 }
1947                 offset += SCTP_SIZE32(plen);
1948                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1949                     sizeof(parm_buf));
1950         }
1951         return (NULL);
1952 }
1953
1954 static struct sctp_tcb *
1955 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1956     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1957     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1958 {
1959         /*
1960          * Use my vtag to hash. If we find it we then verify the source addr
1961          * is in the assoc. If all goes well we save a bit on rec of a
1962          * packet.
1963          */
1964         struct sctpasochead *head;
1965         struct sctp_nets *net;
1966         struct sctp_tcb *stcb;
1967
1968         *netp = NULL;
1969         *inp_p = NULL;
1970         SCTP_INP_INFO_RLOCK();
1971         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1972             SCTP_BASE_INFO(hashasocmark))];
1973         if (head == NULL) {
1974                 /* invalid vtag */
1975                 SCTP_INP_INFO_RUNLOCK();
1976                 return (NULL);
1977         }
1978         LIST_FOREACH(stcb, head, sctp_asocs) {
1979                 SCTP_INP_RLOCK(stcb->sctp_ep);
1980                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1981                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1982                         continue;
1983                 }
1984                 SCTP_TCB_LOCK(stcb);
1985                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1986                 if (stcb->asoc.my_vtag == vtag) {
1987                         /* candidate */
1988                         if (stcb->rport != rport) {
1989                                 SCTP_TCB_UNLOCK(stcb);
1990                                 continue;
1991                         }
1992                         if (stcb->sctp_ep->sctp_lport != lport) {
1993                                 SCTP_TCB_UNLOCK(stcb);
1994                                 continue;
1995                         }
1996                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1997                                 SCTP_TCB_UNLOCK(stcb);
1998                                 continue;
1999                         }
2000                         /* RRS:Need toaddr check here */
2001                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2002                                 /* Endpoint does not own this address */
2003                                 SCTP_TCB_UNLOCK(stcb);
2004                                 continue;
2005                         }
2006                         if (remote_tag) {
2007                                 /*
2008                                  * If we have both vtags thats all we match
2009                                  * on
2010                                  */
2011                                 if (stcb->asoc.peer_vtag == remote_tag) {
2012                                         /*
2013                                          * If both tags match we consider it
2014                                          * conclusive and check NO
2015                                          * source/destination addresses
2016                                          */
2017                                         goto conclusive;
2018                                 }
2019                         }
2020                         if (skip_src_check) {
2021                 conclusive:
2022                                 if (from) {
2023                                         net = sctp_findnet(stcb, from);
2024                                 } else {
2025                                         *netp = NULL;   /* unknown */
2026                                 }
2027                                 if (inp_p)
2028                                         *inp_p = stcb->sctp_ep;
2029                                 SCTP_INP_INFO_RUNLOCK();
2030                                 return (stcb);
2031                         }
2032                         net = sctp_findnet(stcb, from);
2033                         if (net) {
2034                                 /* yep its him. */
2035                                 *netp = net;
2036                                 SCTP_STAT_INCR(sctps_vtagexpress);
2037                                 *inp_p = stcb->sctp_ep;
2038                                 SCTP_INP_INFO_RUNLOCK();
2039                                 return (stcb);
2040                         } else {
2041                                 /*
2042                                  * not him, this should only happen in rare
2043                                  * cases so I peg it.
2044                                  */
2045                                 SCTP_STAT_INCR(sctps_vtagbogus);
2046                         }
2047                 }
2048                 SCTP_TCB_UNLOCK(stcb);
2049         }
2050         SCTP_INP_INFO_RUNLOCK();
2051         return (NULL);
2052 }
2053
2054 /*
2055  * Find an association with the pointer to the inbound IP packet. This can be
2056  * a IPv4 or IPv6 packet.
2057  */
2058 struct sctp_tcb *
2059 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2060     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2061     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2062 {
2063         int find_tcp_pool;
2064         struct ip *iph;
2065         struct sctp_tcb *retval;
2066         struct sockaddr_storage to_store, from_store;
2067         struct sockaddr *to = (struct sockaddr *)&to_store;
2068         struct sockaddr *from = (struct sockaddr *)&from_store;
2069         struct sctp_inpcb *inp;
2070
2071         iph = mtod(m, struct ip *);
2072         switch (iph->ip_v) {
2073         case IPVERSION:
2074                 {
2075                         /* its IPv4 */
2076                         struct sockaddr_in *from4;
2077
2078                         from4 = (struct sockaddr_in *)&from_store;
2079                         bzero(from4, sizeof(*from4));
2080                         from4->sin_family = AF_INET;
2081                         from4->sin_len = sizeof(struct sockaddr_in);
2082                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2083                         from4->sin_port = sh->src_port;
2084                         break;
2085                 }
2086 #ifdef INET6
2087         case IPV6_VERSION >> 4:
2088                 {
2089                         /* its IPv6 */
2090                         struct ip6_hdr *ip6;
2091                         struct sockaddr_in6 *from6;
2092
2093                         ip6 = mtod(m, struct ip6_hdr *);
2094                         from6 = (struct sockaddr_in6 *)&from_store;
2095                         bzero(from6, sizeof(*from6));
2096                         from6->sin6_family = AF_INET6;
2097                         from6->sin6_len = sizeof(struct sockaddr_in6);
2098                         from6->sin6_addr = ip6->ip6_src;
2099                         from6->sin6_port = sh->src_port;
2100                         /* Get the scopes in properly to the sin6 addr's */
2101                         /* we probably don't need these operations */
2102                         (void)sa6_recoverscope(from6);
2103                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2104                         break;
2105                 }
2106 #endif
2107         default:
2108                 /* Currently not supported. */
2109                 return (NULL);
2110         }
2111
2112
2113         switch (iph->ip_v) {
2114         case IPVERSION:
2115                 {
2116                         /* its IPv4 */
2117                         struct sockaddr_in *to4;
2118
2119                         to4 = (struct sockaddr_in *)&to_store;
2120                         bzero(to4, sizeof(*to4));
2121                         to4->sin_family = AF_INET;
2122                         to4->sin_len = sizeof(struct sockaddr_in);
2123                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2124                         to4->sin_port = sh->dest_port;
2125                         break;
2126                 }
2127 #ifdef INET6
2128         case IPV6_VERSION >> 4:
2129                 {
2130                         /* its IPv6 */
2131                         struct ip6_hdr *ip6;
2132                         struct sockaddr_in6 *to6;
2133
2134                         ip6 = mtod(m, struct ip6_hdr *);
2135                         to6 = (struct sockaddr_in6 *)&to_store;
2136                         bzero(to6, sizeof(*to6));
2137                         to6->sin6_family = AF_INET6;
2138                         to6->sin6_len = sizeof(struct sockaddr_in6);
2139                         to6->sin6_addr = ip6->ip6_dst;
2140                         to6->sin6_port = sh->dest_port;
2141                         /* Get the scopes in properly to the sin6 addr's */
2142                         /* we probably don't need these operations */
2143                         (void)sa6_recoverscope(to6);
2144                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2145                         break;
2146                 }
2147 #endif
2148         default:
2149                 /* TSNH */
2150                 break;
2151         }
2152         if (sh->v_tag) {
2153                 /* we only go down this path if vtag is non-zero */
2154                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2155                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2156                 if (retval) {
2157                         return (retval);
2158                 }
2159         }
2160         find_tcp_pool = 0;
2161         if ((ch->chunk_type != SCTP_INITIATION) &&
2162             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2163             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2164             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2165                 /* Other chunk types go to the tcp pool. */
2166                 find_tcp_pool = 1;
2167         }
2168         if (inp_p) {
2169                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2170                     find_tcp_pool, vrf_id);
2171                 inp = *inp_p;
2172         } else {
2173                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2174                     find_tcp_pool, vrf_id);
2175         }
2176         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2177         if (retval == NULL && inp) {
2178                 /* Found a EP but not this address */
2179                 if ((ch->chunk_type == SCTP_INITIATION) ||
2180                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2181                         /*-
2182                          * special hook, we do NOT return linp or an
2183                          * association that is linked to an existing
2184                          * association that is under the TCP pool (i.e. no
2185                          * listener exists). The endpoint finding routine
2186                          * will always find a listner before examining the
2187                          * TCP pool.
2188                          */
2189                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2190                                 if (inp_p) {
2191                                         *inp_p = NULL;
2192                                 }
2193                                 return (NULL);
2194                         }
2195                         retval = sctp_findassociation_special_addr(m, iphlen,
2196                             offset, sh, &inp, netp, to);
2197                         if (inp_p != NULL) {
2198                                 *inp_p = inp;
2199                         }
2200                 }
2201         }
2202         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2203         return (retval);
2204 }
2205
2206 /*
2207  * lookup an association by an ASCONF lookup address.
2208  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2209  */
2210 struct sctp_tcb *
2211 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2212     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2213 {
2214         struct sctp_tcb *stcb;
2215         struct sockaddr_in *sin;
2216
2217 #ifdef INET6
2218         struct sockaddr_in6 *sin6;
2219
2220 #endif
2221         struct sockaddr_storage local_store, remote_store;
2222         struct sockaddr *to;
2223         struct ip *iph;
2224
2225 #ifdef INET6
2226         struct ip6_hdr *ip6;
2227
2228 #endif
2229         struct sctp_paramhdr parm_buf, *phdr;
2230         int ptype;
2231         int zero_address = 0;
2232
2233
2234         memset(&local_store, 0, sizeof(local_store));
2235         memset(&remote_store, 0, sizeof(remote_store));
2236         to = (struct sockaddr *)&local_store;
2237         /* First get the destination address setup too. */
2238         iph = mtod(m, struct ip *);
2239         switch (iph->ip_v) {
2240         case IPVERSION:
2241                 /* its IPv4 */
2242                 sin = (struct sockaddr_in *)&local_store;
2243                 sin->sin_family = AF_INET;
2244                 sin->sin_len = sizeof(*sin);
2245                 sin->sin_port = sh->dest_port;
2246                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2247                 break;
2248 #ifdef INET6
2249         case IPV6_VERSION >> 4:
2250                 /* its IPv6 */
2251                 ip6 = mtod(m, struct ip6_hdr *);
2252                 sin6 = (struct sockaddr_in6 *)&local_store;
2253                 sin6->sin6_family = AF_INET6;
2254                 sin6->sin6_len = sizeof(*sin6);
2255                 sin6->sin6_port = sh->dest_port;
2256                 sin6->sin6_addr = ip6->ip6_dst;
2257                 break;
2258 #endif
2259         default:
2260                 return NULL;
2261         }
2262
2263         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2264             &parm_buf, sizeof(struct sctp_paramhdr));
2265         if (phdr == NULL) {
2266                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2267                     __FUNCTION__);
2268                 return NULL;
2269         }
2270         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2271         /* get the correlation address */
2272         switch (ptype) {
2273 #ifdef INET6
2274         case SCTP_IPV6_ADDRESS:
2275                 {
2276                         /* ipv6 address param */
2277                         struct sctp_ipv6addr_param *p6, p6_buf;
2278
2279                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2280                                 return NULL;
2281                         }
2282                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2283                             offset + sizeof(struct sctp_asconf_chunk),
2284                             &p6_buf.ph, sizeof(*p6));
2285                         if (p6 == NULL) {
2286                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2287                                     __FUNCTION__);
2288                                 return (NULL);
2289                         }
2290                         sin6 = (struct sockaddr_in6 *)&remote_store;
2291                         sin6->sin6_family = AF_INET6;
2292                         sin6->sin6_len = sizeof(*sin6);
2293                         sin6->sin6_port = sh->src_port;
2294                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2295                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2296                                 zero_address = 1;
2297                         break;
2298                 }
2299 #endif
2300         case SCTP_IPV4_ADDRESS:
2301                 {
2302                         /* ipv4 address param */
2303                         struct sctp_ipv4addr_param *p4, p4_buf;
2304
2305                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2306                                 return NULL;
2307                         }
2308                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2309                             offset + sizeof(struct sctp_asconf_chunk),
2310                             &p4_buf.ph, sizeof(*p4));
2311                         if (p4 == NULL) {
2312                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2313                                     __FUNCTION__);
2314                                 return (NULL);
2315                         }
2316                         sin = (struct sockaddr_in *)&remote_store;
2317                         sin->sin_family = AF_INET;
2318                         sin->sin_len = sizeof(*sin);
2319                         sin->sin_port = sh->src_port;
2320                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2321                         if (sin->sin_addr.s_addr == INADDR_ANY)
2322                                 zero_address = 1;
2323                         break;
2324                 }
2325         default:
2326                 /* invalid address param type */
2327                 return NULL;
2328         }
2329
2330         if (zero_address) {
2331                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2332                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2333                 /*
2334                  * printf("findassociation_ep_asconf: zero lookup address
2335                  * finds stcb 0x%x\n", (uint32_t)stcb);
2336                  */
2337         } else {
2338                 stcb = sctp_findassociation_ep_addr(inp_p,
2339                     (struct sockaddr *)&remote_store, netp,
2340                     to, NULL);
2341         }
2342         return (stcb);
2343 }
2344
2345
2346 /*
2347  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2348  * addresses. This way if we don't get a bind we by default pick a ephemeral
2349  * port with all addresses bound.
2350  */
2351 int
2352 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2353 {
2354         /*
2355          * we get called when a new endpoint starts up. We need to allocate
2356          * the sctp_inpcb structure from the zone and init it. Mark it as
2357          * unbound and find a port that we can use as an ephemeral with
2358          * INADDR_ANY. If the user binds later no problem we can then add in
2359          * the specific addresses. And setup the default parameters for the
2360          * EP.
2361          */
2362         int i, error;
2363         struct sctp_inpcb *inp;
2364         struct sctp_pcb *m;
2365         struct timeval time;
2366         sctp_sharedkey_t *null_key;
2367
2368         error = 0;
2369
2370         SCTP_INP_INFO_WLOCK();
2371         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2372         if (inp == NULL) {
2373                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2374                 SCTP_INP_INFO_WUNLOCK();
2375                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2376                 return (ENOBUFS);
2377         }
2378         /* zap it */
2379         bzero(inp, sizeof(*inp));
2380
2381         /* bump generations */
2382         /* setup socket pointers */
2383         inp->sctp_socket = so;
2384         inp->ip_inp.inp.inp_socket = so;
2385         inp->sctp_associd_counter = 1;
2386         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2387         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2388         /* init the small hash table we use to track asocid <-> tcb */
2389         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2390         if (inp->sctp_asocidhash == NULL) {
2391                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2392                 SCTP_INP_INFO_WUNLOCK();
2393                 return (ENOBUFS);
2394         }
2395 #ifdef IPSEC
2396         {
2397                 struct inpcbpolicy *pcb_sp = NULL;
2398
2399                 error = ipsec_init_policy(so, &pcb_sp);
2400                 /* Arrange to share the policy */
2401                 inp->ip_inp.inp.inp_sp = pcb_sp;
2402                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2403         }
2404         if (error != 0) {
2405                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2406                 SCTP_INP_INFO_WUNLOCK();
2407                 return error;
2408         }
2409 #endif                          /* IPSEC */
2410         SCTP_INCR_EP_COUNT();
2411         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2412         SCTP_INP_INFO_WUNLOCK();
2413
2414         so->so_pcb = (caddr_t)inp;
2415
2416         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2417             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2418                 /* UDP style socket */
2419                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2420                     SCTP_PCB_FLAGS_UNBOUND);
2421                 /* Be sure it is NON-BLOCKING IO for UDP */
2422                 /* SCTP_SET_SO_NBIO(so); */
2423         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2424                 /* TCP style socket */
2425                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2426                     SCTP_PCB_FLAGS_UNBOUND);
2427                 /* Be sure we have blocking IO by default */
2428                 SCTP_CLEAR_SO_NBIO(so);
2429         } else {
2430                 /*
2431                  * unsupported socket type (RAW, etc)- in case we missed it
2432                  * in protosw
2433                  */
2434                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2435                 so->so_pcb = NULL;
2436                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2437                 return (EOPNOTSUPP);
2438         }
2439         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2440                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2441                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2442         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2443                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2444                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2445         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2446                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2447                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2448         }
2449         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2450             &inp->sctp_hashmark);
2451         if (inp->sctp_tcbhash == NULL) {
2452                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2453                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2454                 so->so_pcb = NULL;
2455                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2456                 return (ENOBUFS);
2457         }
2458         inp->def_vrf_id = vrf_id;
2459
2460         SCTP_INP_INFO_WLOCK();
2461         SCTP_INP_LOCK_INIT(inp);
2462         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2463         SCTP_INP_READ_INIT(inp);
2464         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2465         /* lock the new ep */
2466         SCTP_INP_WLOCK(inp);
2467
2468         /* add it to the info area */
2469         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2470         SCTP_INP_INFO_WUNLOCK();
2471
2472         TAILQ_INIT(&inp->read_queue);
2473         LIST_INIT(&inp->sctp_addr_list);
2474
2475         LIST_INIT(&inp->sctp_asoc_list);
2476
2477 #ifdef SCTP_TRACK_FREED_ASOCS
2478         /* TEMP CODE */
2479         LIST_INIT(&inp->sctp_asoc_free_list);
2480 #endif
2481         /* Init the timer structure for signature change */
2482         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2483         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2484
2485         /* now init the actual endpoint default data */
2486         m = &inp->sctp_ep;
2487
2488         /* setup the base timeout information */
2489         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2490         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2491         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2492         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2493         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2494         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2495         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2496         /* all max/min max are in ms */
2497         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2498         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2499         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2500         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2501         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2502
2503         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2504
2505         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2506         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2507         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2508         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2509         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2510         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2511         if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
2512             (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
2513                 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2514         } else {
2515                 /* sysctl done with invalid value, set to 2581 */
2516                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2517         }
2518         /* number of streams to pre-open on a association */
2519         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2520
2521         /* Add adaptation cookie */
2522         m->adaptation_layer_indicator = 0x504C5253;
2523
2524         /* seed random number generator */
2525         m->random_counter = 1;
2526         m->store_at = SCTP_SIGNATURE_SIZE;
2527         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2528         sctp_fill_random_store(m);
2529
2530         /* Minimum cookie size */
2531         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2532             sizeof(struct sctp_state_cookie);
2533         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2534
2535         /* Setup the initial secret */
2536         (void)SCTP_GETTIME_TIMEVAL(&time);
2537         m->time_of_secret_change = time.tv_sec;
2538
2539         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2540                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2541         }
2542         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2543
2544         /* How long is a cookie good for ? */
2545         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2546         /*
2547          * Initialize authentication parameters
2548          */
2549         m->local_hmacs = sctp_default_supported_hmaclist();
2550         m->local_auth_chunks = sctp_alloc_chunklist();
2551         sctp_auth_set_default_chunks(m->local_auth_chunks);
2552         LIST_INIT(&m->shared_keys);
2553         /* add default NULL key as key id 0 */
2554         null_key = sctp_alloc_sharedkey();
2555         sctp_insert_sharedkey(&m->shared_keys, null_key);
2556         SCTP_INP_WUNLOCK(inp);
2557 #ifdef SCTP_LOG_CLOSING
2558         sctp_log_closing(inp, NULL, 12);
2559 #endif
2560         return (error);
2561 }
2562
2563
2564 void
2565 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2566     struct sctp_tcb *stcb)
2567 {
2568         struct sctp_nets *net;
2569         uint16_t lport, rport;
2570         struct sctppcbhead *head;
2571         struct sctp_laddr *laddr, *oladdr;
2572
2573         atomic_add_int(&stcb->asoc.refcnt, 1);
2574         SCTP_TCB_UNLOCK(stcb);
2575         SCTP_INP_INFO_WLOCK();
2576         SCTP_INP_WLOCK(old_inp);
2577         SCTP_INP_WLOCK(new_inp);
2578         SCTP_TCB_LOCK(stcb);
2579         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2580
2581         new_inp->sctp_ep.time_of_secret_change =
2582             old_inp->sctp_ep.time_of_secret_change;
2583         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2584             sizeof(old_inp->sctp_ep.secret_key));
2585         new_inp->sctp_ep.current_secret_number =
2586             old_inp->sctp_ep.current_secret_number;
2587         new_inp->sctp_ep.last_secret_number =
2588             old_inp->sctp_ep.last_secret_number;
2589         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2590
2591         /* make it so new data pours into the new socket */
2592         stcb->sctp_socket = new_inp->sctp_socket;
2593         stcb->sctp_ep = new_inp;
2594
2595         /* Copy the port across */
2596         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2597         rport = stcb->rport;
2598         /* Pull the tcb from the old association */
2599         LIST_REMOVE(stcb, sctp_tcbhash);
2600         LIST_REMOVE(stcb, sctp_tcblist);
2601         if (stcb->asoc.in_asocid_hash) {
2602                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2603         }
2604         /* Now insert the new_inp into the TCP connected hash */
2605         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2606             SCTP_BASE_INFO(hashtcpmark))];
2607
2608         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2609         /* Its safe to access */
2610         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2611
2612         /* Now move the tcb into the endpoint list */
2613         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2614         /*
2615          * Question, do we even need to worry about the ep-hash since we
2616          * only have one connection? Probably not :> so lets get rid of it
2617          * and not suck up any kernel memory in that.
2618          */
2619         if (stcb->asoc.in_asocid_hash) {
2620                 struct sctpasochead *lhd;
2621
2622                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2623                     new_inp->hashasocidmark)];
2624                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2625         }
2626         /* Ok. Let's restart timer. */
2627         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2628                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2629                     stcb, net);
2630         }
2631
2632         SCTP_INP_INFO_WUNLOCK();
2633         if (new_inp->sctp_tcbhash != NULL) {
2634                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2635                 new_inp->sctp_tcbhash = NULL;
2636         }
2637         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2638                 /* Subset bound, so copy in the laddr list from the old_inp */
2639                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2640                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2641                         if (laddr == NULL) {
2642                                 /*
2643                                  * Gak, what can we do? This assoc is really
2644                                  * HOSED. We probably should send an abort
2645                                  * here.
2646                                  */
2647                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2648                                 continue;
2649                         }
2650                         SCTP_INCR_LADDR_COUNT();
2651                         bzero(laddr, sizeof(*laddr));
2652                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2653                         laddr->ifa = oladdr->ifa;
2654                         atomic_add_int(&laddr->ifa->refcount, 1);
2655                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2656                             sctp_nxt_addr);
2657                         new_inp->laddr_count++;
2658                 }
2659         }
2660         /*
2661          * Now any running timers need to be adjusted since we really don't
2662          * care if they are running or not just blast in the new_inp into
2663          * all of them.
2664          */
2665
2666         stcb->asoc.hb_timer.ep = (void *)new_inp;
2667         stcb->asoc.dack_timer.ep = (void *)new_inp;
2668         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2669         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2670         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2671         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2672         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2673         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2674         /* now what about the nets? */
2675         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2676                 net->pmtu_timer.ep = (void *)new_inp;
2677                 net->rxt_timer.ep = (void *)new_inp;
2678                 net->fr_timer.ep = (void *)new_inp;
2679         }
2680         SCTP_INP_WUNLOCK(new_inp);
2681         SCTP_INP_WUNLOCK(old_inp);
2682 }
2683
2684
2685
2686
2687 /* sctp_ifap is used to bypass normal local address validation checks */
2688 int
2689 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2690     struct sctp_ifa *sctp_ifap, struct thread *p)
2691 {
2692         /* bind a ep to a socket address */
2693         struct sctppcbhead *head;
2694         struct sctp_inpcb *inp, *inp_tmp;
2695         struct inpcb *ip_inp;
2696         int port_reuse_active = 0;
2697         int bindall;
2698         uint16_t lport;
2699         int error;
2700         uint32_t vrf_id;
2701
2702         lport = 0;
2703         error = 0;
2704         bindall = 1;
2705         inp = (struct sctp_inpcb *)so->so_pcb;
2706         ip_inp = (struct inpcb *)so->so_pcb;
2707 #ifdef SCTP_DEBUG
2708         if (addr) {
2709                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2710                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2711                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2712                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2713         }
2714 #endif
2715         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2716                 /* already did a bind, subsequent binds NOT allowed ! */
2717                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2718                 return (EINVAL);
2719         }
2720 #ifdef INVARIANTS
2721         if (p == NULL)
2722                 panic("null proc/thread");
2723 #endif
2724         if (addr != NULL) {
2725                 switch (addr->sa_family) {
2726                 case AF_INET:
2727                         {
2728                                 struct sockaddr_in *sin;
2729
2730                                 /* IPV6_V6ONLY socket? */
2731                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2732                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2733                                         return (EINVAL);
2734                                 }
2735                                 if (addr->sa_len != sizeof(*sin)) {
2736                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2737                                         return (EINVAL);
2738                                 }
2739                                 sin = (struct sockaddr_in *)addr;
2740                                 lport = sin->sin_port;
2741                                 /*
2742                                  * For LOOPBACK the prison_local_ip4() call
2743                                  * will transmute the ip address to the
2744                                  * proper value.
2745                                  */
2746                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2747                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2748                                         return (error);
2749                                 }
2750                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2751                                         bindall = 0;
2752                                 }
2753                                 break;
2754                         }
2755 #ifdef INET6
2756                 case AF_INET6:
2757                         {
2758                                 /*
2759                                  * Only for pure IPv6 Address. (No IPv4
2760                                  * Mapped!)
2761                                  */
2762                                 struct sockaddr_in6 *sin6;
2763
2764                                 sin6 = (struct sockaddr_in6 *)addr;
2765
2766                                 if (addr->sa_len != sizeof(*sin6)) {
2767                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2768                                         return (EINVAL);
2769                                 }
2770                                 lport = sin6->sin6_port;
2771
2772                                 /*
2773                                  * For LOOPBACK the prison_local_ip6() call
2774                                  * will transmute the ipv6 address to the
2775                                  * proper value.
2776                                  */
2777                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2778                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2779                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2780                                         return (error);
2781                                 }
2782                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2783                                         bindall = 0;
2784                                         /* KAME hack: embed scopeid */
2785                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2786                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2787                                                 return (EINVAL);
2788                                         }
2789                                 }
2790                                 /* this must be cleared for ifa_ifwithaddr() */
2791                                 sin6->sin6_scope_id = 0;
2792                                 break;
2793                         }
2794 #endif
2795                 default:
2796                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2797                         return (EAFNOSUPPORT);
2798                 }
2799         }
2800         SCTP_INP_INFO_WLOCK();
2801         SCTP_INP_WLOCK(inp);
2802         /* Setup a vrf_id to be the default for the non-bind-all case. */
2803         vrf_id = inp->def_vrf_id;
2804
2805         /* increase our count due to the unlock we do */
2806         SCTP_INP_INCR_REF(inp);
2807         if (lport) {
2808                 /*
2809                  * Did the caller specify a port? if so we must see if a ep
2810                  * already has this one bound.
2811                  */
2812                 /* got to be root to get at low ports */
2813                 if (ntohs(lport) < IPPORT_RESERVED) {
2814                         if (p && (error =
2815                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2816                             )) {
2817                                 SCTP_INP_DECR_REF(inp);
2818                                 SCTP_INP_WUNLOCK(inp);
2819                                 SCTP_INP_INFO_WUNLOCK();
2820                                 return (error);
2821                         }
2822                 }
2823                 if (p == NULL) {
2824                         SCTP_INP_DECR_REF(inp);
2825                         SCTP_INP_WUNLOCK(inp);
2826                         SCTP_INP_INFO_WUNLOCK();
2827                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2828                         return (error);
2829                 }
2830                 SCTP_INP_WUNLOCK(inp);
2831                 if (bindall) {
2832                         vrf_id = inp->def_vrf_id;
2833                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2834                         if (inp_tmp != NULL) {
2835                                 /*
2836                                  * lock guy returned and lower count note
2837                                  * that we are not bound so inp_tmp should
2838                                  * NEVER be inp. And it is this inp
2839                                  * (inp_tmp) that gets the reference bump,
2840                                  * so we must lower it.
2841                                  */
2842                                 SCTP_INP_DECR_REF(inp_tmp);
2843                                 /* unlock info */
2844                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2845                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2846                                         /*
2847                                          * Ok, must be one-2-one and
2848                                          * allowing port re-use
2849                                          */
2850                                         port_reuse_active = 1;
2851                                         goto continue_anyway;
2852                                 }
2853                                 SCTP_INP_DECR_REF(inp);
2854                                 SCTP_INP_INFO_WUNLOCK();
2855                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2856                                 return (EADDRINUSE);
2857                         }
2858                 } else {
2859                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2860                         if (inp_tmp != NULL) {
2861                                 /*
2862                                  * lock guy returned and lower count note
2863                                  * that we are not bound so inp_tmp should
2864                                  * NEVER be inp. And it is this inp
2865                                  * (inp_tmp) that gets the reference bump,
2866                                  * so we must lower it.
2867                                  */
2868                                 SCTP_INP_DECR_REF(inp_tmp);
2869                                 /* unlock info */
2870                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2871                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2872                                         /*
2873                                          * Ok, must be one-2-one and
2874                                          * allowing port re-use
2875                                          */
2876                                         port_reuse_active = 1;
2877                                         goto continue_anyway;
2878                                 }
2879                                 SCTP_INP_DECR_REF(inp);
2880                                 SCTP_INP_INFO_WUNLOCK();
2881                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2882                                 return (EADDRINUSE);
2883                         }
2884                 }
2885 continue_anyway:
2886                 SCTP_INP_WLOCK(inp);
2887                 if (bindall) {
2888                         /* verify that no lport is not used by a singleton */
2889                         if ((port_reuse_active == 0) &&
2890                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2891                             ) {
2892                                 /* Sorry someone already has this one bound */
2893                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2894                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2895                                         port_reuse_active = 1;
2896                                 } else {
2897                                         SCTP_INP_DECR_REF(inp);
2898                                         SCTP_INP_WUNLOCK(inp);
2899                                         SCTP_INP_INFO_WUNLOCK();
2900                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2901                                         return (EADDRINUSE);
2902                                 }
2903                         }
2904                 }
2905         } else {
2906                 uint16_t first, last, candidate;
2907                 uint16_t count;
2908                 int done;
2909
2910                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2911                         first = MODULE_GLOBAL(ipport_hifirstauto);
2912                         last = MODULE_GLOBAL(ipport_hilastauto);
2913                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2914                         if (p && (error =
2915                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2916                             )) {
2917                                 SCTP_INP_DECR_REF(inp);
2918                                 SCTP_INP_WUNLOCK(inp);
2919                                 SCTP_INP_INFO_WUNLOCK();
2920                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2921                                 return (error);
2922                         }
2923                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2924                         last = MODULE_GLOBAL(ipport_lowlastauto);
2925                 } else {
2926                         first = MODULE_GLOBAL(ipport_firstauto);
2927                         last = MODULE_GLOBAL(ipport_lastauto);
2928                 }
2929                 if (first > last) {
2930                         uint16_t temp;
2931
2932                         temp = first;
2933                         first = last;
2934                         last = temp;
2935                 }
2936                 count = last - first + 1;       /* number of candidates */
2937                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2938
2939                 done = 0;
2940                 while (!done) {
2941                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2942                                 done = 1;
2943                         }
2944                         if (!done) {
2945                                 if (--count == 0) {
2946                                         SCTP_INP_DECR_REF(inp);
2947                                         SCTP_INP_WUNLOCK(inp);
2948                                         SCTP_INP_INFO_WUNLOCK();
2949                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2950                                         return (EADDRINUSE);
2951                                 }
2952                                 if (candidate == last)
2953                                         candidate = first;
2954                                 else
2955                                         candidate = candidate + 1;
2956                         }
2957                 }
2958                 lport = htons(candidate);
2959         }
2960         SCTP_INP_DECR_REF(inp);
2961         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2962             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2963                 /*
2964                  * this really should not happen. The guy did a non-blocking
2965                  * bind and then did a close at the same time.
2966                  */
2967                 SCTP_INP_WUNLOCK(inp);
2968                 SCTP_INP_INFO_WUNLOCK();
2969                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2970                 return (EINVAL);
2971         }
2972         /* ok we look clear to give out this port, so lets setup the binding */
2973         if (bindall) {
2974                 /* binding to all addresses, so just set in the proper flags */
2975                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2976                 /* set the automatic addr changes from kernel flag */
2977                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2978                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2979                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2980                 } else {
2981                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2982                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2983                 }
2984                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2985                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2986                 } else {
2987                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2988                 }
2989                 /*
2990                  * set the automatic mobility_base from kernel flag (by
2991                  * micchie)
2992                  */
2993                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2994                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2995                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2996                 } else {
2997                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2998                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2999                 }
3000                 /*
3001                  * set the automatic mobility_fasthandoff from kernel flag
3002                  * (by micchie)
3003                  */
3004                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3005                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3006                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3007                 } else {
3008                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3009                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3010                 }
3011         } else {
3012                 /*
3013                  * bind specific, make sure flags is off and add a new
3014                  * address structure to the sctp_addr_list inside the ep
3015                  * structure.
3016                  *
3017                  * We will need to allocate one and insert it at the head. The
3018                  * socketopt call can just insert new addresses in there as
3019                  * well. It will also have to do the embed scope kame hack
3020                  * too (before adding).
3021                  */
3022                 struct sctp_ifa *ifa;
3023                 struct sockaddr_storage store_sa;
3024
3025                 memset(&store_sa, 0, sizeof(store_sa));
3026                 if (addr->sa_family == AF_INET) {
3027                         struct sockaddr_in *sin;
3028
3029                         sin = (struct sockaddr_in *)&store_sa;
3030                         memcpy(sin, addr, sizeof(struct sockaddr_in));
3031                         sin->sin_port = 0;
3032                 } else if (addr->sa_family == AF_INET6) {
3033                         struct sockaddr_in6 *sin6;
3034
3035                         sin6 = (struct sockaddr_in6 *)&store_sa;
3036                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3037                         sin6->sin6_port = 0;
3038                 }
3039                 /*
3040                  * first find the interface with the bound address need to
3041                  * zero out the port to find the address! yuck! can't do
3042                  * this earlier since need port for sctp_pcb_findep()
3043                  */
3044                 if (sctp_ifap != NULL)
3045                         ifa = sctp_ifap;
3046                 else {
3047                         /*
3048                          * Note for BSD we hit here always other O/S's will
3049                          * pass things in via the sctp_ifap argument
3050                          * (Panda).
3051                          */
3052                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3053                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3054                 }
3055                 if (ifa == NULL) {
3056                         /* Can't find an interface with that address */
3057                         SCTP_INP_WUNLOCK(inp);
3058                         SCTP_INP_INFO_WUNLOCK();
3059                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3060                         return (EADDRNOTAVAIL);
3061                 }
3062                 if (addr->sa_family == AF_INET6) {
3063                         /* GAK, more FIXME IFA lock? */
3064                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3065                                 /* Can't bind a non-existent addr. */
3066                                 SCTP_INP_WUNLOCK(inp);
3067                                 SCTP_INP_INFO_WUNLOCK();
3068                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3069                                 return (EINVAL);
3070                         }
3071                 }
3072                 /* we're not bound all */
3073                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3074                 /* allow bindx() to send ASCONF's for binding changes */
3075                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3076                 /* clear automatic addr changes from kernel flag */
3077                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3078
3079                 /* add this address to the endpoint list */
3080                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3081                 if (error != 0) {
3082                         SCTP_INP_WUNLOCK(inp);
3083                         SCTP_INP_INFO_WUNLOCK();
3084                         return (error);
3085                 }
3086                 inp->laddr_count++;
3087         }
3088         /* find the bucket */
3089         if (port_reuse_active) {
3090                 /* Put it into tcp 1-2-1 hash */
3091                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
3092                     SCTP_BASE_INFO(hashtcpmark))];
3093                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3094         } else {
3095                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
3096                     SCTP_BASE_INFO(hashmark))];
3097         }
3098         /* put it in the bucket */
3099         LIST_INSERT_HEAD(head, inp, sctp_hash);
3100         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3101             head, ntohs(lport), port_reuse_active);
3102         /* set in the port */
3103         inp->sctp_lport = lport;
3104
3105         /* turn off just the unbound flag */
3106         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3107         SCTP_INP_WUNLOCK(inp);
3108         SCTP_INP_INFO_WUNLOCK();
3109         return (0);
3110 }
3111
3112
3113 static void
3114 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3115 {
3116         struct sctp_iterator *it, *nit;
3117
3118         /*
3119          * We enter with the only the ITERATOR_LOCK in place and a write
3120          * lock on the inp_info stuff.
3121          */
3122         it = sctp_it_ctl.cur_it;
3123         if (it && (it->vn != curvnet)) {
3124                 /* Its not looking at our VNET */
3125                 return;
3126         }
3127         if (it && (it->inp == inp)) {
3128                 /*
3129                  * This is tricky and we hold the iterator lock, but when it
3130                  * returns and gets the lock (when we release it) the
3131                  * iterator will try to operate on inp. We need to stop that
3132                  * from happening. But of course the iterator has a
3133                  * reference on the stcb and inp. We can mark it and it will
3134                  * stop.
3135                  *
3136                  * If its a single iterator situation, we set the end iterator
3137                  * flag. Otherwise we set the iterator to go to the next
3138                  * inp.
3139                  *
3140                  */
3141                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3142                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3143                 } else {
3144                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3145                 }
3146         }
3147         /*
3148          * Now go through and remove any single reference to our inp that
3149          * may be still pending on the list
3150          */
3151         SCTP_IPI_ITERATOR_WQ_LOCK();
3152         it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
3153         while (it) {
3154                 nit = TAILQ_NEXT(it, sctp_nxt_itr);
3155                 if (it->vn != curvnet) {
3156                         it = nit;
3157                         continue;
3158                 }
3159                 if (it->inp == inp) {
3160                         /* This one points to me is it inp specific? */
3161                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3162                                 /* Remove and free this one */
3163                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3164                                     it, sctp_nxt_itr);
3165                                 if (it->function_atend != NULL) {
3166                                         (*it->function_atend) (it->pointer, it->val);
3167                                 }
3168                                 SCTP_FREE(it, SCTP_M_ITER);
3169                         } else {
3170                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3171                                 if (it->inp) {
3172                                         SCTP_INP_INCR_REF(it->inp);
3173                                 }
3174                         }
3175                         /*
3176                          * When its put in the refcnt is incremented so decr
3177                          * it
3178                          */
3179                         SCTP_INP_DECR_REF(inp);
3180                 }
3181                 it = nit;
3182         }
3183         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3184 }
3185
3186 /* release sctp_inpcb unbind the port */
3187 void
3188 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3189 {
3190         /*
3191          * Here we free a endpoint. We must find it (if it is in the Hash
3192          * table) and remove it from there. Then we must also find it in the
3193          * overall list and remove it from there. After all removals are
3194          * complete then any timer has to be stopped. Then start the actual
3195          * freeing. a) Any local lists. b) Any associations. c) The hash of
3196          * all associations. d) finally the ep itself.
3197          */
3198         struct sctp_pcb *m;
3199         struct sctp_tcb *asoc, *nasoc;
3200         struct sctp_laddr *laddr, *nladdr;
3201         struct inpcb *ip_pcb;
3202         struct socket *so;
3203         int being_refed = 0;
3204         struct sctp_queued_to_read *sq;
3205
3206
3207         int cnt;
3208         sctp_sharedkey_t *shared_key;
3209
3210
3211 #ifdef SCTP_LOG_CLOSING
3212         sctp_log_closing(inp, NULL, 0);
3213 #endif
3214         SCTP_ITERATOR_LOCK();
3215         /* mark any iterators on the list or being processed */
3216         sctp_iterator_inp_being_freed(inp);
3217         SCTP_ITERATOR_UNLOCK();
3218         so = inp->sctp_socket;
3219         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3220                 /* been here before.. eeks.. get out of here */
3221                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3222 #ifdef SCTP_LOG_CLOSING
3223                 sctp_log_closing(inp, NULL, 1);
3224 #endif
3225                 return;
3226         }
3227         SCTP_ASOC_CREATE_LOCK(inp);
3228         SCTP_INP_INFO_WLOCK();
3229
3230         SCTP_INP_WLOCK(inp);
3231         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3232                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3233                 /* socket is gone, so no more wakeups allowed */
3234                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3235                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3236                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3237
3238         }
3239         /* First time through we have the socket lock, after that no more. */
3240         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3241             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3242
3243         if (inp->control) {
3244                 sctp_m_freem(inp->control);
3245                 inp->control = NULL;
3246         }
3247         if (inp->pkt) {
3248                 sctp_m_freem(inp->pkt);
3249                 inp->pkt = NULL;
3250         }
3251         m = &inp->sctp_ep;
3252         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3253                                          * here but I will be nice :> (i.e.
3254                                          * ip_pcb = ep;) */
3255         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3256                 int cnt_in_sd;
3257
3258                 cnt_in_sd = 0;
3259                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3260                     asoc = nasoc) {
3261                         SCTP_TCB_LOCK(asoc);
3262                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
3263                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3264                                 /* Skip guys being freed */
3265                                 cnt_in_sd++;
3266                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3267                                         /*
3268                                          * Special case - we did not start a
3269                                          * kill timer on the asoc due to it
3270                                          * was not closed. So go ahead and
3271                                          * start it now.
3272                                          */
3273                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3274                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3275                                 }
3276                                 SCTP_TCB_UNLOCK(asoc);
3277                                 continue;
3278                         }
3279                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3280                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3281                             (asoc->asoc.total_output_queue_size == 0)) {
3282                                 /*
3283                                  * If we have data in queue, we don't want
3284                                  * to just free since the app may have done,
3285                                  * send()/close or connect/send/close. And
3286                                  * it wants the data to get across first.
3287                                  */
3288                                 /* Just abandon things in the front states */
3289                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3290                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3291                                         cnt_in_sd++;
3292                                 }
3293                                 continue;
3294                         }
3295                         /* Disconnect the socket please */
3296                         asoc->sctp_socket = NULL;
3297                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3298                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3299                             (asoc->asoc.control_pdapi) ||
3300                             (asoc->asoc.size_on_all_streams > 0) ||
3301                             (so && (so->so_rcv.sb_cc > 0))
3302                             ) {
3303                                 /* Left with Data unread */
3304                                 struct mbuf *op_err;
3305
3306                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3307                                     0, M_DONTWAIT, 1, MT_DATA);
3308                                 if (op_err) {
3309                                         /* Fill in the user initiated abort */
3310                                         struct sctp_paramhdr *ph;
3311                                         uint32_t *ippp;
3312
3313                                         SCTP_BUF_LEN(op_err) =
3314                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3315                                         ph = mtod(op_err,
3316                                             struct sctp_paramhdr *);
3317                                         ph->param_type = htons(
3318                                             SCTP_CAUSE_USER_INITIATED_ABT);
3319                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3320                                         ippp = (uint32_t *) (ph + 1);
3321                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3322                                 }
3323                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3324 #if defined(SCTP_PANIC_ON_ABORT)
3325                                 panic("inpcb_free does an abort");
3326 #endif
3327                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3328                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3329                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3330                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3331                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3332                                 }
3333                                 if (sctp_free_assoc(inp, asoc,
3334                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3335                                         cnt_in_sd++;
3336                                 }
3337                                 continue;
3338                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3339                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3340                                     (asoc->asoc.stream_queue_cnt == 0)
3341                             ) {
3342                                 if (asoc->asoc.locked_on_sending) {
3343                                         goto abort_anyway;
3344                                 }
3345                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3346                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3347                                         /*
3348                                          * there is nothing queued to send,
3349                                          * so I send shutdown
3350                                          */
3351                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3352                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3353                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3354                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3355                                         }
3356                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3357                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3358                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3359                                             asoc->asoc.primary_destination);
3360                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3361                                             asoc->asoc.primary_destination);
3362                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3363                                 }
3364                         } else {
3365                                 /* mark into shutdown pending */
3366                                 struct sctp_stream_queue_pending *sp;
3367
3368                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3369                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3370                                     asoc->asoc.primary_destination);
3371                                 if (asoc->asoc.locked_on_sending) {
3372                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3373                                             sctp_streamhead);
3374                                         if (sp == NULL) {
3375                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3376                                                     asoc->asoc.locked_on_sending,
3377                                                     asoc->asoc.locked_on_sending->stream_no);
3378                                         } else {
3379                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3380                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3381                                         }
3382                                 }
3383                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3384                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3385                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3386                                         struct mbuf *op_err;
3387
3388                         abort_anyway:
3389                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3390                                             0, M_DONTWAIT, 1, MT_DATA);
3391                                         if (op_err) {
3392                                                 /*
3393                                                  * Fill in the user
3394                                                  * initiated abort
3395                                                  */
3396                                                 struct sctp_paramhdr *ph;
3397                                                 uint32_t *ippp;
3398
3399                                                 SCTP_BUF_LEN(op_err) =
3400                                                     (sizeof(struct sctp_paramhdr) +
3401                                                     sizeof(uint32_t));
3402                                                 ph = mtod(op_err,
3403                                                     struct sctp_paramhdr *);
3404                                                 ph->param_type = htons(
3405                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3406                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3407                                                 ippp = (uint32_t *) (ph + 1);
3408                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3409                                         }
3410                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3411 #if defined(SCTP_PANIC_ON_ABORT)
3412                                         panic("inpcb_free does an abort");
3413 #endif
3414
3415                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3416                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3417                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3418                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3419                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3420                                         }
3421                                         if (sctp_free_assoc(inp, asoc,
3422                                             SCTP_PCBFREE_NOFORCE,
3423                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3424                                                 cnt_in_sd++;
3425                                         }
3426                                         continue;
3427                                 } else {
3428                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3429                                 }
3430                         }
3431                         cnt_in_sd++;
3432                         SCTP_TCB_UNLOCK(asoc);
3433                 }
3434                 /* now is there some left in our SHUTDOWN state? */
3435                 if (cnt_in_sd) {
3436 #ifdef SCTP_LOG_CLOSING
3437                         sctp_log_closing(inp, NULL, 2);
3438 #endif
3439                         inp->sctp_socket = NULL;
3440                         SCTP_INP_WUNLOCK(inp);
3441                         SCTP_ASOC_CREATE_UNLOCK(inp);
3442                         SCTP_INP_INFO_WUNLOCK();
3443                         return;
3444                 }
3445         }
3446         inp->sctp_socket = NULL;
3447         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3448             SCTP_PCB_FLAGS_UNBOUND) {
3449                 /*
3450                  * ok, this guy has been bound. It's port is somewhere in
3451                  * the SCTP_BASE_INFO(hash table). Remove it!
3452                  */
3453                 LIST_REMOVE(inp, sctp_hash);
3454                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3455         }
3456         /*
3457          * If there is a timer running to kill us, forget it, since it may
3458          * have a contest on the INP lock.. which would cause us to die ...
3459          */
3460         cnt = 0;
3461         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3462             asoc = nasoc) {
3463                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3464                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3465                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3466                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3467                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3468                         }
3469                         cnt++;
3470                         continue;
3471                 }
3472                 /* Free associations that are NOT killing us */
3473                 SCTP_TCB_LOCK(asoc);
3474                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3475                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3476                         struct mbuf *op_err;
3477                         uint32_t *ippp;
3478
3479                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3480                             0, M_DONTWAIT, 1, MT_DATA);
3481                         if (op_err) {
3482                                 /* Fill in the user initiated abort */
3483                                 struct sctp_paramhdr *ph;
3484
3485                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3486                                     sizeof(uint32_t));
3487                                 ph = mtod(op_err, struct sctp_paramhdr *);
3488                                 ph->param_type = htons(
3489                                     SCTP_CAUSE_USER_INITIATED_ABT);
3490                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3491                                 ippp = (uint32_t *) (ph + 1);
3492                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3493
3494                         }
3495                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3496 #if defined(SCTP_PANIC_ON_ABORT)
3497                         panic("inpcb_free does an abort");
3498 #endif
3499                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3500                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3501                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3502                         cnt++;
3503                         SCTP_TCB_UNLOCK(asoc);
3504                         continue;
3505                 }
3506                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3507                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3508                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3509                 }
3510                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3511                         cnt++;
3512                 }
3513         }
3514         if (cnt) {
3515                 /* Ok we have someone out there that will kill us */
3516                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3517 #ifdef SCTP_LOG_CLOSING
3518                 sctp_log_closing(inp, NULL, 3);
3519 #endif
3520                 SCTP_INP_WUNLOCK(inp);
3521                 SCTP_ASOC_CREATE_UNLOCK(inp);
3522                 SCTP_INP_INFO_WUNLOCK();
3523                 return;
3524         }
3525         if (SCTP_INP_LOCK_CONTENDED(inp))
3526                 being_refed++;
3527         if (SCTP_INP_READ_CONTENDED(inp))
3528                 being_refed++;
3529         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3530                 being_refed++;
3531
3532         if ((inp->refcount) ||
3533             (being_refed) ||
3534             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3535                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3536 #ifdef SCTP_LOG_CLOSING
3537                 sctp_log_closing(inp, NULL, 4);
3538 #endif
3539                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3540                 SCTP_INP_WUNLOCK(inp);
3541                 SCTP_ASOC_CREATE_UNLOCK(inp);
3542                 SCTP_INP_INFO_WUNLOCK();
3543                 return;
3544         }
3545         inp->sctp_ep.signature_change.type = 0;
3546         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3547         /*
3548          * Remove it from the list .. last thing we need a lock for.
3549          */
3550         LIST_REMOVE(inp, sctp_list);
3551         SCTP_INP_WUNLOCK(inp);
3552         SCTP_ASOC_CREATE_UNLOCK(inp);
3553         SCTP_INP_INFO_WUNLOCK();
3554         /*
3555          * Now we release all locks. Since this INP cannot be found anymore
3556          * except possbily by the kill timer that might be running. We call
3557          * the drain function here. It should hit the case were it sees the
3558          * ACTIVE flag cleared and exit out freeing us to proceed and
3559          * destroy everything.
3560          */
3561         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3562                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3563         } else {
3564                 /* Probably un-needed */
3565                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3566         }
3567
3568 #ifdef SCTP_LOG_CLOSING
3569         sctp_log_closing(inp, NULL, 5);
3570 #endif
3571
3572
3573         if ((inp->sctp_asocidhash) != NULL) {
3574                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3575                 inp->sctp_asocidhash = NULL;
3576         }
3577         /* sa_ignore FREED_MEMORY */
3578         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3579                 /* Its only abandoned if it had data left */
3580                 if (sq->length)
3581                         SCTP_STAT_INCR(sctps_left_abandon);
3582
3583                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3584                 sctp_free_remote_addr(sq->whoFrom);
3585                 if (so)
3586                         so->so_rcv.sb_cc -= sq->length;
3587                 if (sq->data) {
3588                         sctp_m_freem(sq->data);
3589                         sq->data = NULL;
3590                 }
3591                 /*
3592                  * no need to free the net count, since at this point all
3593                  * assoc's are gone.
3594                  */
3595                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3596                 SCTP_DECR_READQ_COUNT();
3597         }
3598         /* Now the sctp_pcb things */
3599         /*
3600          * free each asoc if it is not already closed/free. we can't use the
3601          * macro here since le_next will get freed as part of the
3602          * sctp_free_assoc() call.
3603          */
3604         cnt = 0;
3605         if (so) {
3606 #ifdef IPSEC
3607                 ipsec_delete_pcbpolicy(ip_pcb);
3608 #endif                          /* IPSEC */
3609
3610                 /* Unlocks not needed since the socket is gone now */
3611         }
3612         if (ip_pcb->inp_options) {
3613                 (void)sctp_m_free(ip_pcb->inp_options);
3614                 ip_pcb->inp_options = 0;
3615         }
3616         if (ip_pcb->inp_moptions) {
3617                 inp_freemoptions(ip_pcb->inp_moptions);
3618                 ip_pcb->inp_moptions = 0;
3619         }
3620 #ifdef INET6
3621         if (ip_pcb->inp_vflag & INP_IPV6) {
3622                 struct in6pcb *in6p;
3623
3624                 in6p = (struct in6pcb *)inp;
3625                 ip6_freepcbopts(in6p->in6p_outputopts);
3626         }
3627 #endif                          /* INET6 */
3628         ip_pcb->inp_vflag = 0;
3629         /* free up authentication fields */
3630         if (inp->sctp_ep.local_auth_chunks != NULL)
3631                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3632         if (inp->sctp_ep.local_hmacs != NULL)
3633                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3634
3635         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3636         while (shared_key) {
3637                 LIST_REMOVE(shared_key, next);
3638                 sctp_free_sharedkey(shared_key);
3639                 /* sa_ignore FREED_MEMORY */
3640                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3641         }
3642
3643         /*
3644          * if we have an address list the following will free the list of
3645          * ifaddr's that are set into this ep. Again macro limitations here,
3646          * since the LIST_FOREACH could be a bad idea.
3647          */
3648         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3649             laddr = nladdr) {
3650                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3651                 sctp_remove_laddr(laddr);
3652         }
3653
3654 #ifdef SCTP_TRACK_FREED_ASOCS
3655         /* TEMP CODE */
3656         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3657             asoc = nasoc) {
3658                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3659                 LIST_REMOVE(asoc, sctp_tcblist);
3660                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3661                 SCTP_DECR_ASOC_COUNT();
3662         }
3663         /* *** END TEMP CODE *** */
3664 #endif
3665         /* Now lets see about freeing the EP hash table. */
3666         if (inp->sctp_tcbhash != NULL) {
3667                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3668                 inp->sctp_tcbhash = NULL;
3669         }
3670         /* Now we must put the ep memory back into the zone pool */
3671         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3672         SCTP_INP_LOCK_DESTROY(inp);
3673         SCTP_INP_READ_DESTROY(inp);
3674         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3675         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3676         SCTP_DECR_EP_COUNT();
3677 }
3678
3679
3680 struct sctp_nets *
3681 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3682 {
3683         struct sctp_nets *net;
3684
3685         /* locate the address */
3686         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3687                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3688                         return (net);
3689         }
3690         return (NULL);
3691 }
3692
3693
3694 int
3695 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3696 {
3697         struct sctp_ifa *sctp_ifa;
3698
3699         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3700         if (sctp_ifa) {
3701                 return (1);
3702         } else {
3703                 return (0);
3704         }
3705 }
3706
3707 /*
3708  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3709  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3710  * stats of stuff.
3711  */
3712 int
3713 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3714     int set_scope, int from)
3715 {
3716         /*
3717          * The following is redundant to the same lines in the
3718          * sctp_aloc_assoc() but is needed since other's call the add
3719          * address function
3720          */
3721         struct sctp_nets *net, *netfirst;
3722         int addr_inscope;
3723
3724         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3725             from);
3726         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3727
3728         netfirst = sctp_findnet(stcb, newaddr);
3729         if (netfirst) {
3730                 /*
3731                  * Lie and return ok, we don't want to make the association
3732                  * go away for this behavior. It will happen in the TCP
3733                  * model in a connected socket. It does not reach the hash
3734                  * table until after the association is built so it can't be
3735                  * found. Mark as reachable, since the initial creation will
3736                  * have been cleared and the NOT_IN_ASSOC flag will have
3737                  * been added... and we don't want to end up removing it
3738                  * back out.
3739                  */
3740                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3741                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3742                             SCTP_ADDR_UNCONFIRMED);
3743                 } else {
3744                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3745                 }
3746
3747                 return (0);
3748         }
3749         addr_inscope = 1;
3750         if (newaddr->sa_family == AF_INET) {
3751                 struct sockaddr_in *sin;
3752
3753                 sin = (struct sockaddr_in *)newaddr;
3754                 if (sin->sin_addr.s_addr == 0) {
3755                         /* Invalid address */
3756                         return (-1);
3757                 }
3758                 /* zero out the bzero area */
3759                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3760
3761                 /* assure len is set */
3762                 sin->sin_len = sizeof(struct sockaddr_in);
3763                 if (set_scope) {
3764 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3765                         stcb->ipv4_local_scope = 1;
3766 #else
3767                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3768                                 stcb->asoc.ipv4_local_scope = 1;
3769                         }
3770 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3771                 } else {
3772                         /* Validate the address is in scope */
3773                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3774                             (stcb->asoc.ipv4_local_scope == 0)) {
3775                                 addr_inscope = 0;
3776                         }
3777                 }
3778 #ifdef INET6
3779         } else if (newaddr->sa_family == AF_INET6) {
3780                 struct sockaddr_in6 *sin6;
3781
3782                 sin6 = (struct sockaddr_in6 *)newaddr;
3783                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3784                         /* Invalid address */
3785                         return (-1);
3786                 }
3787                 /* assure len is set */
3788                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3789                 if (set_scope) {
3790                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3791                                 stcb->asoc.loopback_scope = 1;
3792                                 stcb->asoc.local_scope = 0;
3793                                 stcb->asoc.ipv4_local_scope = 1;
3794                                 stcb->asoc.site_scope = 1;
3795                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3796                                 /*
3797                                  * If the new destination is a LINK_LOCAL we
3798                                  * must have common site scope. Don't set
3799                                  * the local scope since we may not share
3800                                  * all links, only loopback can do this.
3801                                  * Links on the local network would also be
3802                                  * on our private network for v4 too.
3803                                  */
3804                                 stcb->asoc.ipv4_local_scope = 1;
3805                                 stcb->asoc.site_scope = 1;
3806                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3807                                 /*
3808                                  * If the new destination is SITE_LOCAL then
3809                                  * we must have site scope in common.
3810                                  */
3811                                 stcb->asoc.site_scope = 1;
3812                         }
3813                 } else {
3814                         /* Validate the address is in scope */
3815                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3816                             (stcb->asoc.loopback_scope == 0)) {
3817                                 addr_inscope = 0;
3818                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3819                             (stcb->asoc.local_scope == 0)) {
3820                                 addr_inscope = 0;
3821                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3822                             (stcb->asoc.site_scope == 0)) {
3823                                 addr_inscope = 0;
3824                         }
3825                 }
3826 #endif
3827         } else {
3828                 /* not supported family type */
3829                 return (-1);
3830         }
3831         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3832         if (net == NULL) {
3833                 return (-1);
3834         }
3835         SCTP_INCR_RADDR_COUNT();
3836         bzero(net, sizeof(*net));
3837         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3838         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3839         if (newaddr->sa_family == AF_INET) {
3840                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3841         } else if (newaddr->sa_family == AF_INET6) {
3842                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3843         }
3844         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3845         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3846                 stcb->asoc.loopback_scope = 1;
3847                 stcb->asoc.ipv4_local_scope = 1;
3848                 stcb->asoc.local_scope = 0;
3849                 stcb->asoc.site_scope = 1;
3850                 addr_inscope = 1;
3851         }
3852         net->failure_threshold = stcb->asoc.def_net_failure;
3853         if (addr_inscope == 0) {
3854                 net->dest_state = (SCTP_ADDR_REACHABLE |
3855                     SCTP_ADDR_OUT_OF_SCOPE);
3856         } else {
3857                 if (from == SCTP_ADDR_IS_CONFIRMED)
3858                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3859                         net->dest_state = SCTP_ADDR_REACHABLE;
3860                 else
3861                         net->dest_state = SCTP_ADDR_REACHABLE |
3862                             SCTP_ADDR_UNCONFIRMED;
3863         }
3864         /*
3865          * We set this to 0, the timer code knows that this means its an
3866          * initial value
3867          */
3868         net->RTO = 0;
3869         net->RTO_measured = 0;
3870         stcb->asoc.numnets++;
3871         *(&net->ref_count) = 1;
3872         net->tos_flowlabel = 0;
3873         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3874                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3875         } else {
3876                 net->port = 0;
3877         }
3878 #ifdef INET
3879         if (newaddr->sa_family == AF_INET)
3880                 net->tos_flowlabel = stcb->asoc.default_tos;
3881 #endif
3882 #ifdef INET6
3883         if (newaddr->sa_family == AF_INET6)
3884                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3885 #endif
3886         /* Init the timer structure */
3887         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3888         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3889         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3890
3891         /* Now generate a route for this guy */
3892 #ifdef INET6
3893         /* KAME hack: embed scopeid */
3894         if (newaddr->sa_family == AF_INET6) {
3895                 struct sockaddr_in6 *sin6;
3896
3897                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3898                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3899                 sin6->sin6_scope_id = 0;
3900         }
3901 #endif
3902         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3903
3904         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3905                 /* Get source address */
3906                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3907                     stcb,
3908                     (sctp_route_t *) & net->ro,
3909                     net,
3910                     0,
3911                     stcb->asoc.vrf_id);
3912                 /* Now get the interface MTU */
3913                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3914                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3915                 } else {
3916                         net->mtu = 0;
3917                 }
3918 #ifdef SCTP_PRINT_FOR_B_AND_M
3919                 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
3920 #endif
3921                 if (net->mtu == 0) {
3922                         /* Huh ?? */
3923                         net->mtu = SCTP_DEFAULT_MTU;
3924                 } else {
3925                         uint32_t rmtu;
3926
3927                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3928 #ifdef SCTP_PRINT_FOR_B_AND_M
3929                         SCTP_PRINTF("The route mtu is %d\n", rmtu);
3930 #endif
3931                         if (rmtu == 0) {
3932                                 /*
3933                                  * Start things off to match mtu of
3934                                  * interface please.
3935                                  */
3936                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3937                                     net->ro.ro_rt, net->mtu);
3938                         } else {
3939                                 /*
3940                                  * we take the route mtu over the interface,
3941                                  * since the route may be leading out the
3942                                  * loopback, or a different interface.
3943                                  */
3944                                 net->mtu = rmtu;
3945                         }
3946                 }
3947                 if (from == SCTP_ALLOC_ASOC) {
3948 #ifdef SCTP_PRINT_FOR_B_AND_M
3949                         SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
3950 #endif
3951                         stcb->asoc.smallest_mtu = net->mtu;
3952                 }
3953         } else {
3954                 net->mtu = stcb->asoc.smallest_mtu;
3955         }
3956 #ifdef INET6
3957         if (newaddr->sa_family == AF_INET6) {
3958                 struct sockaddr_in6 *sin6;
3959
3960                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3961                 (void)sa6_recoverscope(sin6);
3962         }
3963 #endif
3964         if (net->port) {
3965                 net->mtu -= sizeof(struct udphdr);
3966         }
3967         if (stcb->asoc.smallest_mtu > net->mtu) {
3968 #ifdef SCTP_PRINT_FOR_B_AND_M
3969                 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
3970                     net->mtu, stcb->asoc.smallest_mtu);
3971 #endif
3972                 stcb->asoc.smallest_mtu = net->mtu;
3973         }
3974         /* JRS - Use the congestion control given in the CC module */
3975         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3976
3977         /*
3978          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3979          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3980          */
3981         net->find_pseudo_cumack = 1;
3982         net->find_rtx_pseudo_cumack = 1;
3983         net->src_addr_selected = 0;
3984         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3985         if (net->ro.ro_rt == NULL) {
3986                 /* Since we have no route put it at the back */
3987                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3988         } else if (netfirst == NULL) {
3989                 /* We are the first one in the pool. */
3990                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3991         } else if (netfirst->ro.ro_rt == NULL) {
3992                 /*
3993                  * First one has NO route. Place this one ahead of the first
3994                  * one.
3995                  */
3996                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3997         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3998                 /*
3999                  * This one has a different interface than the one at the
4000                  * top of the list. Place it ahead.
4001                  */
4002                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4003         } else {
4004                 /*
4005                  * Ok we have the same interface as the first one. Move
4006                  * forward until we find either a) one with a NULL route...
4007                  * insert ahead of that b) one with a different ifp.. insert
4008                  * after that. c) end of the list.. insert at the tail.
4009                  */
4010                 struct sctp_nets *netlook;
4011
4012                 do {
4013                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4014                         if (netlook == NULL) {
4015                                 /* End of the list */
4016                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4017                                 break;
4018                         } else if (netlook->ro.ro_rt == NULL) {
4019                                 /* next one has NO route */
4020                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4021                                 break;
4022                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4023                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4024                                     net, sctp_next);
4025                                 break;
4026                         }
4027                         /* Shift forward */
4028                         netfirst = netlook;
4029                 } while (netlook != NULL);
4030         }
4031
4032         /* got to have a primary set */
4033         if (stcb->asoc.primary_destination == 0) {
4034                 stcb->asoc.primary_destination = net;
4035         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4036                     (net->ro.ro_rt) &&
4037             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4038                 /* No route to current primary adopt new primary */
4039                 stcb->asoc.primary_destination = net;
4040         }
4041         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
4042             net);
4043         /* Validate primary is first */
4044         net = TAILQ_FIRST(&stcb->asoc.nets);
4045         if ((net != stcb->asoc.primary_destination) &&
4046             (stcb->asoc.primary_destination)) {
4047                 /*
4048                  * first one on the list is NOT the primary sctp_cmpaddr()
4049                  * is much more efficent if the primary is the first on the
4050                  * list, make it so.
4051                  */
4052                 TAILQ_REMOVE(&stcb->asoc.nets,
4053                     stcb->asoc.primary_destination, sctp_next);
4054                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4055                     stcb->asoc.primary_destination, sctp_next);
4056         }
4057         return (0);
4058 }
4059
4060
4061 static uint32_t
4062 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4063 {
4064         uint32_t id;
4065         struct sctpasochead *head;
4066         struct sctp_tcb *lstcb;
4067
4068         SCTP_INP_WLOCK(inp);
4069 try_again:
4070         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4071                 /* TSNH */
4072                 SCTP_INP_WUNLOCK(inp);
4073                 return (0);
4074         }
4075         /*
4076          * We don't allow assoc id to be 0, this is needed otherwise if the
4077          * id were to wrap we would have issues with some socket options.
4078          */
4079         if (inp->sctp_associd_counter == 0) {
4080                 inp->sctp_associd_counter++;
4081         }
4082         id = inp->sctp_associd_counter;
4083         inp->sctp_associd_counter++;
4084         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4085         if (lstcb) {
4086                 goto try_again;
4087         }
4088         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4089         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4090         stcb->asoc.in_asocid_hash = 1;
4091         SCTP_INP_WUNLOCK(inp);
4092         return id;
4093 }
4094
4095 /*
4096  * allocate an association and add it to the endpoint. The caller must be
4097  * careful to add all additional addresses once they are know right away or
4098  * else the assoc will be may experience a blackout scenario.
4099  */
4100 struct sctp_tcb *
4101 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4102     int *error, uint32_t override_tag, uint32_t vrf_id,
4103     struct thread *p
4104 )
4105 {
4106         /* note the p argument is only valid in unbound sockets */
4107
4108         struct sctp_tcb *stcb;
4109         struct sctp_association *asoc;
4110         struct sctpasochead *head;
4111         uint16_t rport;
4112         int err;
4113
4114         /*
4115          * Assumption made here: Caller has done a
4116          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4117          * address does not exist already.
4118          */
4119         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4120                 /* Hit max assoc, sorry no more */
4121                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4122                 *error = ENOBUFS;
4123                 return (NULL);
4124         }
4125         if (firstaddr == NULL) {
4126                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4127                 *error = EINVAL;
4128                 return (NULL);
4129         }
4130         SCTP_INP_RLOCK(inp);
4131         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4132             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4133             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4134                 /*
4135                  * If its in the TCP pool, its NOT allowed to create an
4136                  * association. The parent listener needs to call
4137                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4138                  * off, or connected one does this.. its an error.
4139                  */
4140                 SCTP_INP_RUNLOCK(inp);
4141                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4142                 *error = EINVAL;
4143                 return (NULL);
4144         }
4145         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4146 #ifdef SCTP_DEBUG
4147         if (firstaddr) {
4148                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4149                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4150                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4151         } else {
4152                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4153         }
4154 #endif                          /* SCTP_DEBUG */
4155         if (firstaddr->sa_family == AF_INET) {
4156                 struct sockaddr_in *sin;
4157
4158                 sin = (struct sockaddr_in *)firstaddr;
4159                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4160                         /* Invalid address */
4161                         SCTP_INP_RUNLOCK(inp);
4162                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4163                         *error = EINVAL;
4164                         return (NULL);
4165                 }
4166                 rport = sin->sin_port;
4167         } else if (firstaddr->sa_family == AF_INET6) {
4168                 struct sockaddr_in6 *sin6;
4169
4170                 sin6 = (struct sockaddr_in6 *)firstaddr;
4171                 if ((sin6->sin6_port == 0) ||
4172                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4173                         /* Invalid address */
4174                         SCTP_INP_RUNLOCK(inp);
4175                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4176                         *error = EINVAL;
4177                         return (NULL);
4178                 }
4179                 rport = sin6->sin6_port;
4180         } else {
4181                 /* not supported family type */
4182                 SCTP_INP_RUNLOCK(inp);
4183                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4184                 *error = EINVAL;
4185                 return (NULL);
4186         }
4187         SCTP_INP_RUNLOCK(inp);
4188         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4189                 /*
4190                  * If you have not performed a bind, then we need to do the
4191                  * ephemerial bind for you.
4192                  */
4193                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4194                     (struct sockaddr *)NULL,
4195                     (struct sctp_ifa *)NULL,
4196                     p
4197                     ))) {
4198                         /* bind error, probably perm */
4199                         *error = err;
4200                         return (NULL);
4201                 }
4202         }
4203         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4204         if (stcb == NULL) {
4205                 /* out of memory? */
4206                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4207                 *error = ENOMEM;
4208                 return (NULL);
4209         }
4210         SCTP_INCR_ASOC_COUNT();
4211
4212         bzero(stcb, sizeof(*stcb));
4213         asoc = &stcb->asoc;
4214
4215         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4216         SCTP_TCB_LOCK_INIT(stcb);
4217         SCTP_TCB_SEND_LOCK_INIT(stcb);
4218         stcb->rport = rport;
4219         /* setup back pointer's */
4220         stcb->sctp_ep = inp;
4221         stcb->sctp_socket = inp->sctp_socket;
4222         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4223                 /* failed */
4224                 SCTP_TCB_LOCK_DESTROY(stcb);
4225                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4226                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4227                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4228                 SCTP_DECR_ASOC_COUNT();
4229                 *error = err;
4230                 return (NULL);
4231         }
4232         /* and the port */
4233         SCTP_INP_INFO_WLOCK();
4234         SCTP_INP_WLOCK(inp);
4235         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4236                 /* inpcb freed while alloc going on */
4237                 SCTP_TCB_LOCK_DESTROY(stcb);
4238                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4239                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4240                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4241                 SCTP_INP_WUNLOCK(inp);
4242                 SCTP_INP_INFO_WUNLOCK();
4243                 SCTP_DECR_ASOC_COUNT();
4244                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4245                 *error = EINVAL;
4246                 return (NULL);
4247         }
4248         SCTP_TCB_LOCK(stcb);
4249
4250         /* now that my_vtag is set, add it to the hash */
4251         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4252         /* put it in the bucket in the vtag hash of assoc's for the system */
4253         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4254         SCTP_INP_INFO_WUNLOCK();
4255
4256         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4257                 /* failure.. memory error? */
4258                 if (asoc->strmout) {
4259                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4260                         asoc->strmout = NULL;
4261                 }
4262                 if (asoc->mapping_array) {
4263                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4264                         asoc->mapping_array = NULL;
4265                 }
4266                 if (asoc->nr_mapping_array) {
4267                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4268                         asoc->nr_mapping_array = NULL;
4269                 }
4270                 SCTP_DECR_ASOC_COUNT();
4271                 SCTP_TCB_LOCK_DESTROY(stcb);
4272                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4273                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4274                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4275                 SCTP_INP_WUNLOCK(inp);
4276                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4277                 *error = ENOBUFS;
4278                 return (NULL);
4279         }
4280         /* Init all the timers */
4281         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4282         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4283         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4284         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4285         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4286         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4287         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4288         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4289
4290         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4291         /* now file the port under the hash as well */
4292         if (inp->sctp_tcbhash != NULL) {
4293                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4294                     inp->sctp_hashmark)];
4295                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4296         }
4297         SCTP_INP_WUNLOCK(inp);
4298         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4299         return (stcb);
4300 }
4301
4302
4303 void
4304 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4305 {
4306         struct sctp_association *asoc;
4307
4308         asoc = &stcb->asoc;
4309         asoc->numnets--;
4310         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4311         if (net == asoc->primary_destination) {
4312                 /* Reset primary */
4313                 struct sctp_nets *lnet;
4314
4315                 lnet = TAILQ_FIRST(&asoc->nets);
4316                 /*
4317                  * Mobility adaptation Ideally, if deleted destination is
4318                  * the primary, it becomes a fast retransmission trigger by
4319                  * the subsequent SET PRIMARY. (by micchie)
4320                  */
4321                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4322                     SCTP_MOBILITY_BASE) ||
4323                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4324                     SCTP_MOBILITY_FASTHANDOFF)) {
4325                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4326                         if (asoc->deleted_primary != NULL) {
4327                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4328                                 goto out;
4329                         }
4330                         asoc->deleted_primary = net;
4331                         atomic_add_int(&net->ref_count, 1);
4332                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4333                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4334                         sctp_mobility_feature_on(stcb->sctp_ep,
4335                             SCTP_MOBILITY_PRIM_DELETED);
4336                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4337                             stcb->sctp_ep, stcb, NULL);
4338                 }
4339 out:
4340                 /* Try to find a confirmed primary */
4341                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4342         }
4343         if (net == asoc->last_data_chunk_from) {
4344                 /* Reset primary */
4345                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4346         }
4347         if (net == asoc->last_control_chunk_from) {
4348                 /* Clear net */
4349                 asoc->last_control_chunk_from = NULL;
4350         }
4351         sctp_free_remote_addr(net);
4352 }
4353
4354 /*
4355  * remove a remote endpoint address from an association, it will fail if the
4356  * address does not exist.
4357  */
4358 int
4359 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4360 {
4361         /*
4362          * Here we need to remove a remote address. This is quite simple, we
4363          * first find it in the list of address for the association
4364          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4365          * on that item. Note we do not allow it to be removed if there are
4366          * no other addresses.
4367          */
4368         struct sctp_association *asoc;
4369         struct sctp_nets *net, *net_tmp;
4370
4371         asoc = &stcb->asoc;
4372
4373         /* locate the address */
4374         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4375                 net_tmp = TAILQ_NEXT(net, sctp_next);
4376                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4377                         continue;
4378                 }
4379                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4380                     remaddr)) {
4381                         /* we found the guy */
4382                         if (asoc->numnets < 2) {
4383                                 /* Must have at LEAST two remote addresses */
4384                                 return (-1);
4385                         } else {
4386                                 sctp_remove_net(stcb, net);
4387                                 return (0);
4388                         }
4389                 }
4390         }
4391         /* not found. */
4392         return (-2);
4393 }
4394
4395 void
4396 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4397 {
4398         struct sctpvtaghead *chain;
4399         struct sctp_tagblock *twait_block;
4400         int found = 0;
4401         int i;
4402
4403         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4404         if (!LIST_EMPTY(chain)) {
4405                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4406                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4407                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4408                                     (twait_block->vtag_block[i].lport == lport) &&
4409                                     (twait_block->vtag_block[i].rport == rport)) {
4410                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4411                                         twait_block->vtag_block[i].v_tag = 0;
4412                                         twait_block->vtag_block[i].lport = 0;
4413                                         twait_block->vtag_block[i].rport = 0;
4414                                         found = 1;
4415                                         break;
4416                                 }
4417                         }
4418                         if (found)
4419                                 break;
4420                 }
4421         }
4422 }
4423
4424 int
4425 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4426 {
4427         struct sctpvtaghead *chain;
4428         struct sctp_tagblock *twait_block;
4429         int found = 0;
4430         int i;
4431
4432         SCTP_INP_INFO_WLOCK();
4433         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4434         if (!LIST_EMPTY(chain)) {
4435                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4436                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4437                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4438                                     (twait_block->vtag_block[i].lport == lport) &&
4439                                     (twait_block->vtag_block[i].rport == rport)) {
4440                                         found = 1;
4441                                         break;
4442                                 }
4443                         }
4444                         if (found)
4445                                 break;
4446                 }
4447         }
4448         SCTP_INP_INFO_WUNLOCK();
4449         return (found);
4450 }
4451
4452
4453 void
4454 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4455 {
4456         struct sctpvtaghead *chain;
4457         struct sctp_tagblock *twait_block;
4458         struct timeval now;
4459         int set, i;
4460
4461         if (time == 0) {
4462                 /* Its disabled */
4463                 return;
4464         }
4465         (void)SCTP_GETTIME_TIMEVAL(&now);
4466         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4467         set = 0;
4468         if (!LIST_EMPTY(chain)) {
4469                 /* Block(s) present, lets find space, and expire on the fly */
4470                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4471                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4472                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4473                                     !set) {
4474                                         twait_block->vtag_block[i].tv_sec_at_expire =
4475                                             now.tv_sec + time;
4476                                         twait_block->vtag_block[i].v_tag = tag;
4477                                         twait_block->vtag_block[i].lport = lport;
4478                                         twait_block->vtag_block[i].rport = rport;
4479                                         set = 1;
4480                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4481                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4482                                         /* Audit expires this guy */
4483                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4484                                         twait_block->vtag_block[i].v_tag = 0;
4485                                         twait_block->vtag_block[i].lport = 0;
4486                                         twait_block->vtag_block[i].rport = 0;
4487                                         if (set == 0) {
4488                                                 /* Reuse it for my new tag */
4489                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4490                                                 twait_block->vtag_block[i].v_tag = tag;
4491                                                 twait_block->vtag_block[i].lport = lport;
4492                                                 twait_block->vtag_block[i].rport = rport;
4493                                                 set = 1;
4494                                         }
4495                                 }
4496                         }
4497                         if (set) {
4498                                 /*
4499                                  * We only do up to the block where we can
4500                                  * place our tag for audits
4501                                  */
4502                                 break;
4503                         }
4504                 }
4505         }
4506         /* Need to add a new block to chain */
4507         if (!set) {
4508                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4509                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4510                 if (twait_block == NULL) {
4511 #ifdef INVARIANTS
4512                         panic("Can not alloc tagblock");
4513 #endif
4514                         return;
4515                 }
4516                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4517                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4518                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4519                 twait_block->vtag_block[0].v_tag = tag;
4520                 twait_block->vtag_block[0].lport = lport;
4521                 twait_block->vtag_block[0].rport = rport;
4522         }
4523 }
4524
4525
4526
4527 /*-
4528  * Free the association after un-hashing the remote port. This
4529  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4530  * expect that the input to this function IS a locked TCB.
4531  * It will return 0, if it did NOT destroy the association (instead
4532  * it unlocks it. It will return NON-zero if it either destroyed the
4533  * association OR the association is already destroyed.
4534  */
4535 int
4536 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4537 {
4538         int i;
4539         struct sctp_association *asoc;
4540         struct sctp_nets *net, *prev;
4541         struct sctp_laddr *laddr;
4542         struct sctp_tmit_chunk *chk;
4543         struct sctp_asconf_addr *aparam;
4544         struct sctp_asconf_ack *aack;
4545         struct sctp_stream_reset_list *liste;
4546         struct sctp_queued_to_read *sq;
4547         struct sctp_stream_queue_pending *sp;
4548         sctp_sharedkey_t *shared_key;
4549         struct socket *so;
4550         int ccnt = 0;
4551         int cnt = 0;
4552
4553         /* first, lets purge the entry from the hash table. */
4554
4555 #ifdef SCTP_LOG_CLOSING
4556         sctp_log_closing(inp, stcb, 6);
4557 #endif
4558         if (stcb->asoc.state == 0) {
4559 #ifdef SCTP_LOG_CLOSING
4560                 sctp_log_closing(inp, NULL, 7);
4561 #endif
4562                 /* there is no asoc, really TSNH :-0 */
4563                 return (1);
4564         }
4565         /* TEMP CODE */
4566         if (stcb->freed_from_where == 0) {
4567                 /* Only record the first place free happened from */
4568                 stcb->freed_from_where = from_location;
4569         }
4570         /* TEMP CODE */
4571
4572         asoc = &stcb->asoc;
4573         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4574             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4575                 /* nothing around */
4576                 so = NULL;
4577         else
4578                 so = inp->sctp_socket;
4579
4580         /*
4581          * We used timer based freeing if a reader or writer is in the way.
4582          * So we first check if we are actually being called from a timer,
4583          * if so we abort early if a reader or writer is still in the way.
4584          */
4585         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4586             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4587                 /*
4588                  * is it the timer driving us? if so are the reader/writers
4589                  * gone?
4590                  */
4591                 if (stcb->asoc.refcnt) {
4592                         /* nope, reader or writer in the way */
4593                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4594                         /* no asoc destroyed */
4595                         SCTP_TCB_UNLOCK(stcb);
4596 #ifdef SCTP_LOG_CLOSING
4597                         sctp_log_closing(inp, stcb, 8);
4598 #endif
4599                         return (0);
4600                 }
4601         }
4602         /* now clean up any other timers */
4603         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4604         asoc->hb_timer.self = NULL;
4605         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4606         asoc->dack_timer.self = NULL;
4607         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4608         /*-
4609          * For stream reset we don't blast this unless
4610          * it is a str-reset timer, it might be the
4611          * free-asoc timer which we DON'T want to
4612          * disturb.
4613          */
4614         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4615                 asoc->strreset_timer.self = NULL;
4616         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4617         asoc->asconf_timer.self = NULL;
4618         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4619         asoc->autoclose_timer.self = NULL;
4620         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4621         asoc->shut_guard_timer.self = NULL;
4622         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4623         asoc->delayed_event_timer.self = NULL;
4624         /* Mobility adaptation */
4625         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4626         asoc->delete_prim_timer.self = NULL;
4627         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4628                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4629                 net->fr_timer.self = NULL;
4630                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4631                 net->rxt_timer.self = NULL;
4632                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4633                 net->pmtu_timer.self = NULL;
4634         }
4635         /* Now the read queue needs to be cleaned up (only once) */
4636         cnt = 0;
4637         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4638                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4639                 SCTP_INP_READ_LOCK(inp);
4640                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4641                         if (sq->stcb == stcb) {
4642                                 sq->do_not_ref_stcb = 1;
4643                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4644                                 /*
4645                                  * If there is no end, there never will be
4646                                  * now.
4647                                  */
4648                                 if (sq->end_added == 0) {
4649                                         /* Held for PD-API clear that. */
4650                                         sq->pdapi_aborted = 1;
4651                                         sq->held_length = 0;
4652                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4653                                                 /*
4654                                                  * Need to add a PD-API
4655                                                  * aborted indication.
4656                                                  * Setting the control_pdapi
4657                                                  * assures that it will be
4658                                                  * added right after this
4659                                                  * msg.
4660                                                  */
4661                                                 uint32_t strseq;
4662
4663                                                 stcb->asoc.control_pdapi = sq;
4664                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4665                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4666                                                     stcb,
4667                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4668                                                     (void *)&strseq,
4669                                                     SCTP_SO_LOCKED);
4670                                                 stcb->asoc.control_pdapi = NULL;
4671                                         }
4672                                 }
4673                                 /* Add an end to wake them */
4674                                 sq->end_added = 1;
4675                                 cnt++;
4676                         }
4677                 }
4678                 SCTP_INP_READ_UNLOCK(inp);
4679                 if (stcb->block_entry) {
4680                         cnt++;
4681                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4682                         stcb->block_entry->error = ECONNRESET;
4683                         stcb->block_entry = NULL;
4684                 }
4685         }
4686         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4687                 /*
4688                  * Someone holds a reference OR the socket is unaccepted
4689                  * yet.
4690                  */
4691                 if ((stcb->asoc.refcnt) ||
4692                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4693                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4694                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4695                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4696                 }
4697                 SCTP_TCB_UNLOCK(stcb);
4698                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4699                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4700                         /* nothing around */
4701                         so = NULL;
4702                 if (so) {
4703                         /* Wake any reader/writers */
4704                         sctp_sorwakeup(inp, so);
4705                         sctp_sowwakeup(inp, so);
4706                 }
4707 #ifdef SCTP_LOG_CLOSING
4708                 sctp_log_closing(inp, stcb, 9);
4709 #endif
4710                 /* no asoc destroyed */
4711                 return (0);
4712         }
4713 #ifdef SCTP_LOG_CLOSING
4714         sctp_log_closing(inp, stcb, 10);
4715 #endif
4716         /*
4717          * When I reach here, no others want to kill the assoc yet.. and I
4718          * own the lock. Now its possible an abort comes in when I do the
4719          * lock exchange below to grab all the locks to do the final take
4720          * out. to prevent this we increment the count, which will start a
4721          * timer and blow out above thus assuring us that we hold exclusive
4722          * killing of the asoc. Note that after getting back the TCB lock we
4723          * will go ahead and increment the counter back up and stop any
4724          * timer a passing stranger may have started :-S
4725          */
4726         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4727                 atomic_add_int(&stcb->asoc.refcnt, 1);
4728
4729                 SCTP_TCB_UNLOCK(stcb);
4730                 SCTP_INP_INFO_WLOCK();
4731                 SCTP_INP_WLOCK(inp);
4732                 SCTP_TCB_LOCK(stcb);
4733         }
4734         /* Double check the GONE flag */
4735         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4736             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4737                 /* nothing around */
4738                 so = NULL;
4739
4740         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4741             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4742                 /*
4743                  * For TCP type we need special handling when we are
4744                  * connected. We also include the peel'ed off ones to.
4745                  */
4746                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4747                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4748                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4749                         if (so) {
4750                                 SOCK_LOCK(so);
4751                                 if (so->so_rcv.sb_cc == 0) {
4752                                         so->so_state &= ~(SS_ISCONNECTING |
4753                                             SS_ISDISCONNECTING |
4754                                             SS_ISCONFIRMING |
4755                                             SS_ISCONNECTED);
4756                                 }
4757                                 socantrcvmore_locked(so);
4758                                 sctp_sowwakeup(inp, so);
4759                                 sctp_sorwakeup(inp, so);
4760                                 SCTP_SOWAKEUP(so);
4761                         }
4762                 }
4763         }
4764         /*
4765          * Make it invalid too, that way if its about to run it will abort
4766          * and return.
4767          */
4768         /* re-increment the lock */
4769         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4770                 atomic_add_int(&stcb->asoc.refcnt, -1);
4771         }
4772         if (stcb->asoc.refcnt) {
4773                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4774                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4775                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4776                         SCTP_INP_INFO_WUNLOCK();
4777                         SCTP_INP_WUNLOCK(inp);
4778                 }
4779                 SCTP_TCB_UNLOCK(stcb);
4780                 return (0);
4781         }
4782         asoc->state = 0;
4783         if (inp->sctp_tcbhash) {
4784                 LIST_REMOVE(stcb, sctp_tcbhash);
4785         }
4786         if (stcb->asoc.in_asocid_hash) {
4787                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4788         }
4789         /* Now lets remove it from the list of ALL associations in the EP */
4790         LIST_REMOVE(stcb, sctp_tcblist);
4791         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4792                 SCTP_INP_INCR_REF(inp);
4793                 SCTP_INP_WUNLOCK(inp);
4794         }
4795         /* pull from vtag hash */
4796         LIST_REMOVE(stcb, sctp_asocs);
4797         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4798             inp->sctp_lport, stcb->rport);
4799
4800         /*
4801          * Now restop the timers to be sure this is paranoia at is finest!
4802          */
4803         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4804         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4805         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4806         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4807         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4808         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4809         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4810         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4811         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4812                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4813                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4814                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4815         }
4816
4817         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4818         prev = NULL;
4819         /*
4820          * The chunk lists and such SHOULD be empty but we check them just
4821          * in case.
4822          */
4823         /* anything on the wheel needs to be removed */
4824         for (i = 0; i < asoc->streamoutcnt; i++) {
4825                 struct sctp_stream_out *outs;
4826
4827                 outs = &asoc->strmout[i];
4828                 /* now clean up any chunks here */
4829                 sp = TAILQ_FIRST(&outs->outqueue);
4830                 while (sp) {
4831                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4832                         if (sp->data) {
4833                                 sctp_m_freem(sp->data);
4834                                 sp->data = NULL;
4835                                 sp->tail_mbuf = NULL;
4836                         }
4837                         sctp_free_remote_addr(sp->net);
4838                         sctp_free_spbufspace(stcb, asoc, sp);
4839                         if (sp->holds_key_ref)
4840                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4841                         /* Free the zone stuff  */
4842                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4843                         SCTP_DECR_STRMOQ_COUNT();
4844                         /* sa_ignore FREED_MEMORY */
4845                         sp = TAILQ_FIRST(&outs->outqueue);
4846                 }
4847         }
4848
4849         /* sa_ignore FREED_MEMORY */
4850         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4851                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4852                 SCTP_FREE(liste, SCTP_M_STRESET);
4853         }
4854
4855         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4856         while (sq) {
4857                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4858                 if (sq->data) {
4859                         sctp_m_freem(sq->data);
4860                         sq->data = NULL;
4861                 }
4862                 sctp_free_remote_addr(sq->whoFrom);
4863                 sq->whoFrom = NULL;
4864                 sq->stcb = NULL;
4865                 /* Free the ctl entry */
4866                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4867                 SCTP_DECR_READQ_COUNT();
4868                 /* sa_ignore FREED_MEMORY */
4869                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4870         }
4871
4872         chk = TAILQ_FIRST(&asoc->free_chunks);
4873         while (chk) {
4874                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4875                 if (chk->data) {
4876                         sctp_m_freem(chk->data);
4877                         chk->data = NULL;
4878                 }
4879                 if (chk->holds_key_ref)
4880                         sctp_auth_key_release(stcb, chk->auth_keyid);
4881                 ccnt++;
4882                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4883                 SCTP_DECR_CHK_COUNT();
4884                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4885                 asoc->free_chunk_cnt--;
4886                 /* sa_ignore FREED_MEMORY */
4887                 chk = TAILQ_FIRST(&asoc->free_chunks);
4888         }
4889         /* pending send queue SHOULD be empty */
4890         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4891                 chk = TAILQ_FIRST(&asoc->send_queue);
4892                 while (chk) {
4893                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4894                         if (chk->data) {
4895                                 sctp_m_freem(chk->data);
4896                                 chk->data = NULL;
4897                         }
4898                         if (chk->holds_key_ref)
4899                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4900                         ccnt++;
4901                         sctp_free_remote_addr(chk->whoTo);
4902                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4903                         SCTP_DECR_CHK_COUNT();
4904                         /* sa_ignore FREED_MEMORY */
4905                         chk = TAILQ_FIRST(&asoc->send_queue);
4906                 }
4907         }
4908 /*
4909   if (ccnt) {
4910   printf("Freed %d from send_queue\n", ccnt);
4911   ccnt = 0;
4912   }
4913 */
4914         /* sent queue SHOULD be empty */
4915         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4916                 chk = TAILQ_FIRST(&asoc->sent_queue);
4917                 while (chk) {
4918                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4919                         if (chk->data) {
4920                                 sctp_m_freem(chk->data);
4921                                 chk->data = NULL;
4922                         }
4923                         if (chk->holds_key_ref)
4924                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4925                         ccnt++;
4926                         sctp_free_remote_addr(chk->whoTo);
4927                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4928                         SCTP_DECR_CHK_COUNT();
4929                         /* sa_ignore FREED_MEMORY */
4930                         chk = TAILQ_FIRST(&asoc->sent_queue);
4931                 }
4932         }
4933 /*
4934   if (ccnt) {
4935   printf("Freed %d from sent_queue\n", ccnt);
4936   ccnt = 0;
4937   }
4938 */
4939         /* control queue MAY not be empty */
4940         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4941                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4942                 while (chk) {
4943                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4944                         if (chk->data) {
4945                                 sctp_m_freem(chk->data);
4946                                 chk->data = NULL;
4947                         }
4948                         if (chk->holds_key_ref)
4949                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4950                         ccnt++;
4951                         sctp_free_remote_addr(chk->whoTo);
4952                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4953                         SCTP_DECR_CHK_COUNT();
4954                         /* sa_ignore FREED_MEMORY */
4955                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4956                 }
4957         }
4958 /*
4959   if (ccnt) {
4960   printf("Freed %d from ctrl_queue\n", ccnt);
4961   ccnt = 0;
4962   }
4963 */
4964
4965         /* ASCONF queue MAY not be empty */
4966         if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4967                 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4968                 while (chk) {
4969                         TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4970                         if (chk->data) {
4971                                 sctp_m_freem(chk->data);
4972                                 chk->data = NULL;
4973                         }
4974                         if (chk->holds_key_ref)
4975                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4976                         ccnt++;
4977                         sctp_free_remote_addr(chk->whoTo);
4978                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4979                         SCTP_DECR_CHK_COUNT();
4980                         /* sa_ignore FREED_MEMORY */
4981                         chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4982                 }
4983         }
4984 /*
4985   if (ccnt) {
4986   printf("Freed %d from asconf_queue\n", ccnt);
4987   ccnt = 0;
4988   }
4989 */
4990         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
4991                 chk = TAILQ_FIRST(&asoc->reasmqueue);
4992                 while (chk) {
4993                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4994                         if (chk->data) {
4995                                 sctp_m_freem(chk->data);
4996                                 chk->data = NULL;
4997                         }
4998                         if (chk->holds_key_ref)
4999                                 sctp_auth_key_release(stcb, chk->auth_keyid);
5000                         sctp_free_remote_addr(chk->whoTo);
5001                         ccnt++;
5002                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5003                         SCTP_DECR_CHK_COUNT();
5004                         /* sa_ignore FREED_MEMORY */
5005                         chk = TAILQ_FIRST(&asoc->reasmqueue);
5006                 }
5007         }
5008 /*
5009   if (ccnt) {
5010   printf("Freed %d from reasm_queue\n", ccnt);
5011   ccnt = 0;
5012   }
5013 */
5014         if (asoc->mapping_array) {
5015                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5016                 asoc->mapping_array = NULL;
5017         }
5018         if (asoc->nr_mapping_array) {
5019                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5020                 asoc->nr_mapping_array = NULL;
5021         }
5022         /* the stream outs */
5023         if (asoc->strmout) {
5024                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5025                 asoc->strmout = NULL;
5026         }
5027         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5028         if (asoc->strmin) {
5029                 struct sctp_queued_to_read *ctl;
5030
5031                 for (i = 0; i < asoc->streamincnt; i++) {
5032                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
5033                                 /* We have somethings on the streamin queue */
5034                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
5035                                 while (ctl) {
5036                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
5037                                             ctl, next);
5038                                         sctp_free_remote_addr(ctl->whoFrom);
5039                                         if (ctl->data) {
5040                                                 sctp_m_freem(ctl->data);
5041                                                 ctl->data = NULL;
5042                                         }
5043                                         /*
5044                                          * We don't free the address here
5045                                          * since all the net's were freed
5046                                          * above.
5047                                          */
5048                                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5049                                         SCTP_DECR_READQ_COUNT();
5050                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
5051                                 }
5052                         }
5053                 }
5054                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5055                 asoc->strmin = NULL;
5056         }
5057         asoc->streamincnt = 0;
5058         while (!TAILQ_EMPTY(&asoc->nets)) {
5059                 /* sa_ignore FREED_MEMORY */
5060                 net = TAILQ_FIRST(&asoc->nets);
5061                 /* pull from list */
5062                 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
5063 #ifdef INVARIANTS
5064                         panic("no net's left alloc'ed, or list points to itself");
5065 #endif
5066                         break;
5067                 }
5068                 prev = net;
5069                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5070                 sctp_free_remote_addr(net);
5071         }
5072
5073         while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
5074                 /* sa_ignore FREED_MEMORY */
5075                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
5076                 sctp_remove_laddr(laddr);
5077         }
5078
5079         /* pending asconf (address) parameters */
5080         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
5081                 /* sa_ignore FREED_MEMORY */
5082                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
5083                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5084                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5085         }
5086         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
5087                 /* sa_ignore FREED_MEMORY */
5088                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
5089                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5090                 if (aack->data != NULL) {
5091                         sctp_m_freem(aack->data);
5092                 }
5093                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5094         }
5095         /* clean up auth stuff */
5096         if (asoc->local_hmacs)
5097                 sctp_free_hmaclist(asoc->local_hmacs);
5098         if (asoc->peer_hmacs)
5099                 sctp_free_hmaclist(asoc->peer_hmacs);
5100
5101         if (asoc->local_auth_chunks)
5102                 sctp_free_chunklist(asoc->local_auth_chunks);
5103         if (asoc->peer_auth_chunks)
5104                 sctp_free_chunklist(asoc->peer_auth_chunks);
5105
5106         sctp_free_authinfo(&asoc->authinfo);
5107
5108         shared_key = LIST_FIRST(&asoc->shared_keys);
5109         while (shared_key) {
5110                 LIST_REMOVE(shared_key, next);
5111                 sctp_free_sharedkey(shared_key);
5112                 /* sa_ignore FREED_MEMORY */
5113                 shared_key = LIST_FIRST(&asoc->shared_keys);
5114         }
5115
5116         /* Insert new items here :> */
5117
5118         /* Get rid of LOCK */
5119         SCTP_TCB_LOCK_DESTROY(stcb);
5120         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5121         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5122                 SCTP_INP_INFO_WUNLOCK();
5123                 SCTP_INP_RLOCK(inp);
5124         }
5125 #ifdef SCTP_TRACK_FREED_ASOCS
5126         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5127                 /* now clean up the tasoc itself */
5128                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5129                 SCTP_DECR_ASOC_COUNT();
5130         } else {
5131                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5132         }
5133 #else
5134         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5135         SCTP_DECR_ASOC_COUNT();
5136 #endif
5137         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5138                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5139                         /*
5140                          * If its NOT the inp_free calling us AND sctp_close
5141                          * as been called, we call back...
5142                          */
5143                         SCTP_INP_RUNLOCK(inp);
5144                         /*
5145                          * This will start the kill timer (if we are the
5146                          * lastone) since we hold an increment yet. But this
5147                          * is the only safe way to do this since otherwise
5148                          * if the socket closes at the same time we are here
5149                          * we might collide in the cleanup.
5150                          */
5151                         sctp_inpcb_free(inp,
5152                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5153                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5154                         SCTP_INP_DECR_REF(inp);
5155                         goto out_of;
5156                 } else {
5157                         /* The socket is still open. */
5158                         SCTP_INP_DECR_REF(inp);
5159                 }
5160         }
5161         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5162                 SCTP_INP_RUNLOCK(inp);
5163         }
5164 out_of:
5165         /* destroyed the asoc */
5166 #ifdef SCTP_LOG_CLOSING
5167         sctp_log_closing(inp, NULL, 11);
5168 #endif
5169         return (1);
5170 }
5171
5172
5173
5174 /*
5175  * determine if a destination is "reachable" based upon the addresses bound
5176  * to the current endpoint (e.g. only v4 or v6 currently bound)
5177  */
5178 /*
5179  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5180  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5181  * types bound as its endpoint
5182  */
5183 int
5184 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5185 {
5186         struct sctp_inpcb *inp;
5187         int answer;
5188
5189         /*
5190          * No locks here, the TCB, in all cases is already locked and an
5191          * assoc is up. There is either a INP lock by the caller applied (in
5192          * asconf case when deleting an address) or NOT in the HB case,
5193          * however if HB then the INP increment is up and the INP will not
5194          * be removed (on top of the fact that we have a TCB lock). So we
5195          * only want to read the sctp_flags, which is either bound-all or
5196          * not.. no protection needed since once an assoc is up you can't be
5197          * changing your binding.
5198          */
5199         inp = stcb->sctp_ep;
5200         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5201                 /* if bound all, destination is not restricted */
5202                 /*
5203                  * RRS: Question during lock work: Is this correct? If you
5204                  * are bound-all you still might need to obey the V4--V6
5205                  * flags??? IMO this bound-all stuff needs to be removed!
5206                  */
5207                 return (1);
5208         }
5209         /* NOTE: all "scope" checks are done when local addresses are added */
5210         if (destaddr->sa_family == AF_INET6) {
5211                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5212         } else if (destaddr->sa_family == AF_INET) {
5213                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5214         } else {
5215                 /* invalid family, so it's unreachable */
5216                 answer = 0;
5217         }
5218         return (answer);
5219 }
5220
5221 /*
5222  * update the inp_vflags on an endpoint
5223  */
5224 static void
5225 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5226 {
5227         struct sctp_laddr *laddr;
5228
5229         /* first clear the flag */
5230         inp->ip_inp.inp.inp_vflag = 0;
5231         /* set the flag based on addresses on the ep list */
5232         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5233                 if (laddr->ifa == NULL) {
5234                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5235                             __FUNCTION__);
5236                         continue;
5237                 }
5238                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5239                         continue;
5240                 }
5241                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5242                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5243                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5244                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5245                 }
5246         }
5247 }
5248
5249 /*
5250  * Add the address to the endpoint local address list There is nothing to be
5251  * done if we are bound to all addresses
5252  */
5253 void
5254 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5255 {
5256         struct sctp_laddr *laddr;
5257         int fnd, error = 0;
5258
5259         fnd = 0;
5260
5261         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5262                 /* You are already bound to all. You have it already */
5263                 return;
5264         }
5265         if (ifa->address.sa.sa_family == AF_INET6) {
5266                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5267                         /* Can't bind a non-useable addr. */
5268                         return;
5269                 }
5270         }
5271         /* first, is it already present? */
5272         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5273                 if (laddr->ifa == ifa) {
5274                         fnd = 1;
5275                         break;
5276                 }
5277         }
5278
5279         if (fnd == 0) {
5280                 /* Not in the ep list */
5281                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5282                 if (error != 0)
5283                         return;
5284                 inp->laddr_count++;
5285                 /* update inp_vflag flags */
5286                 if (ifa->address.sa.sa_family == AF_INET6) {
5287                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5288                 } else if (ifa->address.sa.sa_family == AF_INET) {
5289                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5290                 }
5291         }
5292         return;
5293 }
5294
5295
5296 /*
5297  * select a new (hopefully reachable) destination net (should only be used
5298  * when we deleted an ep addr that is the only usable source address to reach
5299  * the destination net)
5300  */
5301 static void
5302 sctp_select_primary_destination(struct sctp_tcb *stcb)
5303 {
5304         struct sctp_nets *net;
5305
5306         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5307                 /* for now, we'll just pick the first reachable one we find */
5308                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5309                         continue;
5310                 if (sctp_destination_is_reachable(stcb,
5311                     (struct sockaddr *)&net->ro._l_addr)) {
5312                         /* found a reachable destination */
5313                         stcb->asoc.primary_destination = net;
5314                 }
5315         }
5316         /* I can't there from here! ...we're gonna die shortly... */
5317 }
5318
5319
5320 /*
5321  * Delete the address from the endpoint local address list There is nothing
5322  * to be done if we are bound to all addresses
5323  */
5324 void
5325 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5326 {
5327         struct sctp_laddr *laddr;
5328         int fnd;
5329
5330         fnd = 0;
5331         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5332                 /* You are already bound to all. You have it already */
5333                 return;
5334         }
5335         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5336                 if (laddr->ifa == ifa) {
5337                         fnd = 1;
5338                         break;
5339                 }
5340         }
5341         if (fnd && (inp->laddr_count < 2)) {
5342                 /* can't delete unless there are at LEAST 2 addresses */
5343                 return;
5344         }
5345         if (fnd) {
5346                 /*
5347                  * clean up any use of this address go through our
5348                  * associations and clear any last_used_address that match
5349                  * this one for each assoc, see if a new primary_destination
5350                  * is needed
5351                  */
5352                 struct sctp_tcb *stcb;
5353
5354                 /* clean up "next_addr_touse" */
5355                 if (inp->next_addr_touse == laddr)
5356                         /* delete this address */
5357                         inp->next_addr_touse = NULL;
5358
5359                 /* clean up "last_used_address" */
5360                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5361                         struct sctp_nets *net;
5362
5363                         SCTP_TCB_LOCK(stcb);
5364                         if (stcb->asoc.last_used_address == laddr)
5365                                 /* delete this address */
5366                                 stcb->asoc.last_used_address = NULL;
5367                         /*
5368                          * Now spin through all the nets and purge any ref
5369                          * to laddr
5370                          */
5371                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5372                                 if (net->ro._s_addr &&
5373                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5374                                         /* Yep, purge src address selected */
5375                                         sctp_rtentry_t *rt;
5376
5377                                         /* delete this address if cached */
5378                                         rt = net->ro.ro_rt;
5379                                         if (rt != NULL) {
5380                                                 RTFREE(rt);
5381                                                 net->ro.ro_rt = NULL;
5382                                         }
5383                                         sctp_free_ifa(net->ro._s_addr);
5384                                         net->ro._s_addr = NULL;
5385                                         net->src_addr_selected = 0;
5386                                 }
5387                         }
5388                         SCTP_TCB_UNLOCK(stcb);
5389                 }               /* for each tcb */
5390                 /* remove it from the ep list */
5391                 sctp_remove_laddr(laddr);
5392                 inp->laddr_count--;
5393                 /* update inp_vflag flags */
5394                 sctp_update_ep_vflag(inp);
5395         }
5396         return;
5397 }
5398
5399 /*
5400  * Add the address to the TCB local address restricted list.
5401  * This is a "pending" address list (eg. addresses waiting for an
5402  * ASCONF-ACK response) and cannot be used as a valid source address.
5403  */
5404 void
5405 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5406 {
5407         struct sctp_inpcb *inp;
5408         struct sctp_laddr *laddr;
5409         struct sctpladdr *list;
5410
5411         /*
5412          * Assumes TCB is locked.. and possibly the INP. May need to
5413          * confirm/fix that if we need it and is not the case.
5414          */
5415         list = &stcb->asoc.sctp_restricted_addrs;
5416
5417         inp = stcb->sctp_ep;
5418         if (ifa->address.sa.sa_family == AF_INET6) {
5419                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5420                         /* Can't bind a non-existent addr. */
5421                         return;
5422                 }
5423         }
5424         /* does the address already exist? */
5425         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5426                 if (laddr->ifa == ifa) {
5427                         return;
5428                 }
5429         }
5430
5431         /* add to the list */
5432         (void)sctp_insert_laddr(list, ifa, 0);
5433         return;
5434 }
5435
5436 /*
5437  * insert an laddr entry with the given ifa for the desired list
5438  */
5439 int
5440 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5441 {
5442         struct sctp_laddr *laddr;
5443
5444         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5445         if (laddr == NULL) {
5446                 /* out of memory? */
5447                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5448                 return (EINVAL);
5449         }
5450         SCTP_INCR_LADDR_COUNT();
5451         bzero(laddr, sizeof(*laddr));
5452         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5453         laddr->ifa = ifa;
5454         laddr->action = act;
5455         atomic_add_int(&ifa->refcount, 1);
5456         /* insert it */
5457         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5458
5459         return (0);
5460 }
5461
5462 /*
5463  * Remove an laddr entry from the local address list (on an assoc)
5464  */
5465 void
5466 sctp_remove_laddr(struct sctp_laddr *laddr)
5467 {
5468
5469         /* remove from the list */
5470         LIST_REMOVE(laddr, sctp_nxt_addr);
5471         sctp_free_ifa(laddr->ifa);
5472         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5473         SCTP_DECR_LADDR_COUNT();
5474 }
5475
5476 /*
5477  * Remove a local address from the TCB local address restricted list
5478  */
5479 void
5480 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5481 {
5482         struct sctp_inpcb *inp;
5483         struct sctp_laddr *laddr;
5484
5485         /*
5486          * This is called by asconf work. It is assumed that a) The TCB is
5487          * locked and b) The INP is locked. This is true in as much as I can
5488          * trace through the entry asconf code where I did these locks.
5489          * Again, the ASCONF code is a bit different in that it does lock
5490          * the INP during its work often times. This must be since we don't
5491          * want other proc's looking up things while what they are looking
5492          * up is changing :-D
5493          */
5494
5495         inp = stcb->sctp_ep;
5496         /* if subset bound and don't allow ASCONF's, can't delete last */
5497         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5498             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5499                 if (stcb->sctp_ep->laddr_count < 2) {
5500                         /* can't delete last address */
5501                         return;
5502                 }
5503         }
5504         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5505                 /* remove the address if it exists */
5506                 if (laddr->ifa == NULL)
5507                         continue;
5508                 if (laddr->ifa == ifa) {
5509                         sctp_remove_laddr(laddr);
5510                         return;
5511                 }
5512         }
5513
5514         /* address not found! */
5515         return;
5516 }
5517
5518 /*
5519  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5520  */
5521 /* sysctl */
5522 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5523 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5524
5525 void
5526 sctp_pcb_init()
5527 {
5528         /*
5529          * SCTP initialization for the PCB structures should be called by
5530          * the sctp_init() funciton.
5531          */
5532         int i;
5533         struct timeval tv;
5534
5535         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5536                 /* error I was called twice */
5537                 return;
5538         }
5539         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5540
5541 #if defined(SCTP_LOCAL_TRACE_BUF)
5542         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5543 #endif
5544         (void)SCTP_GETTIME_TIMEVAL(&tv);
5545 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5546         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5547         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5548 #else
5549         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5550         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5551 #endif
5552         /* init the empty list of (All) Endpoints */
5553         LIST_INIT(&SCTP_BASE_INFO(listhead));
5554
5555
5556         /* init the hash table of endpoints */
5557         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5558         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5559         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5560         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5561             &SCTP_BASE_INFO(hashasocmark));
5562         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5563             &SCTP_BASE_INFO(hashmark));
5564         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5565             &SCTP_BASE_INFO(hashtcpmark));
5566         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5567
5568
5569         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5570             &SCTP_BASE_INFO(hashvrfmark));
5571
5572         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5573             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5574         /* init the zones */
5575         /*
5576          * FIX ME: Should check for NULL returns, but if it does fail we are
5577          * doomed to panic anyways... add later maybe.
5578          */
5579         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5580             sizeof(struct sctp_inpcb), maxsockets);
5581
5582         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5583             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5584
5585         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5586             sizeof(struct sctp_laddr),
5587             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5588
5589         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5590             sizeof(struct sctp_nets),
5591             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5592
5593         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5594             sizeof(struct sctp_tmit_chunk),
5595             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5596
5597         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5598             sizeof(struct sctp_queued_to_read),
5599             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5600
5601         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5602             sizeof(struct sctp_stream_queue_pending),
5603             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5604
5605         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5606             sizeof(struct sctp_asconf),
5607             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5608
5609         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5610             sizeof(struct sctp_asconf_ack),
5611             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5612
5613
5614         /* Master Lock INIT for info structure */
5615         SCTP_INP_INFO_LOCK_INIT();
5616         SCTP_STATLOG_INIT_LOCK();
5617
5618         SCTP_IPI_COUNT_INIT();
5619         SCTP_IPI_ADDR_INIT();
5620 #ifdef SCTP_PACKET_LOGGING
5621         SCTP_IP_PKTLOG_INIT();
5622 #endif
5623         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5624
5625         SCTP_WQ_ADDR_INIT();
5626         /* not sure if we need all the counts */
5627         SCTP_BASE_INFO(ipi_count_ep) = 0;
5628         /* assoc/tcb zone info */
5629         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5630         /* local addrlist zone info */
5631         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5632         /* remote addrlist zone info */
5633         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5634         /* chunk info */
5635         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5636
5637         /* socket queue zone info */
5638         SCTP_BASE_INFO(ipi_count_readq) = 0;
5639
5640         /* stream out queue cont */
5641         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5642
5643         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5644         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5645
5646         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5647
5648         /* Init the TIMEWAIT list */
5649         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5650                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5651         }
5652
5653         sctp_startup_iterator();
5654
5655         /*
5656          * INIT the default VRF which for BSD is the only one, other O/S's
5657          * may have more. But initially they must start with one and then
5658          * add the VRF's as addresses are added.
5659          */
5660         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5661
5662 }
5663
5664 /*
5665  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5666  */
5667 void
5668 sctp_pcb_finish(void)
5669 {
5670         struct sctp_vrflist *vrf_bucket;
5671         struct sctp_vrf *vrf;
5672         struct sctp_ifn *ifn;
5673         struct sctp_ifa *ifa;
5674         struct sctpvtaghead *chain;
5675         struct sctp_tagblock *twait_block, *prev_twait_block;
5676         struct sctp_laddr *wi;
5677         int i;
5678
5679         /*
5680          * Free BSD the it thread never exits but we do clean up. The only
5681          * way freebsd reaches here if we have VRF's but we still add the
5682          * ifdef to make it compile on old versions.
5683          */
5684         {
5685                 struct sctp_iterator *it, *nit;
5686
5687                 SCTP_IPI_ITERATOR_WQ_LOCK();
5688                 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
5689                 while (it) {
5690                         nit = TAILQ_NEXT(it, sctp_nxt_itr);
5691                         if (it->vn != curvnet) {
5692                                 it = nit;
5693                                 continue;
5694                         }
5695                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
5696                             it, sctp_nxt_itr);
5697                         if (it->function_atend != NULL) {
5698                                 (*it->function_atend) (it->pointer, it->val);
5699                         }
5700                         SCTP_FREE(it, SCTP_M_ITER);
5701                         it = nit;
5702                 }
5703                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5704                 SCTP_ITERATOR_LOCK();
5705                 if ((sctp_it_ctl.cur_it) &&
5706                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5707                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5708                 }
5709                 SCTP_ITERATOR_UNLOCK();
5710         }
5711
5712         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5713         SCTP_WQ_ADDR_LOCK();
5714         while ((wi = LIST_FIRST(&SCTP_BASE_INFO(addr_wq))) != NULL) {
5715                 LIST_REMOVE(wi, sctp_nxt_addr);
5716                 SCTP_DECR_LADDR_COUNT();
5717                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5718         }
5719         SCTP_WQ_ADDR_UNLOCK();
5720
5721         /*
5722          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5723          * destroyed first).
5724          */
5725         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5726         while ((vrf = LIST_FIRST(vrf_bucket)) != NULL) {
5727                 while ((ifn = LIST_FIRST(&vrf->ifnlist)) != NULL) {
5728                         while ((ifa = LIST_FIRST(&ifn->ifalist)) != NULL) {
5729                                 /* free the ifa */
5730                                 LIST_REMOVE(ifa, next_bucket);
5731                                 LIST_REMOVE(ifa, next_ifa);
5732                                 SCTP_FREE(ifa, SCTP_M_IFA);
5733                         }
5734                         /* free the ifn */
5735                         LIST_REMOVE(ifn, next_bucket);
5736                         LIST_REMOVE(ifn, next_ifn);
5737                         SCTP_FREE(ifn, SCTP_M_IFN);
5738                 }
5739                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5740                 /* free the vrf */
5741                 LIST_REMOVE(vrf, next_vrf);
5742                 SCTP_FREE(vrf, SCTP_M_VRF);
5743         }
5744         /* free the vrf hashes */
5745         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5746         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5747
5748         /*
5749          * free the TIMEWAIT list elements malloc'd in the function
5750          * sctp_add_vtag_to_timewait()...
5751          */
5752         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5753                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5754                 if (!LIST_EMPTY(chain)) {
5755                         prev_twait_block = NULL;
5756                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5757                                 if (prev_twait_block) {
5758                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5759                                 }
5760                                 prev_twait_block = twait_block;
5761                         }
5762                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5763                 }
5764         }
5765
5766         /* free the locks and mutexes */
5767 #ifdef SCTP_PACKET_LOGGING
5768         SCTP_IP_PKTLOG_DESTROY();
5769 #endif
5770         SCTP_IPI_ADDR_DESTROY();
5771         SCTP_STATLOG_DESTROY();
5772         SCTP_INP_INFO_LOCK_DESTROY();
5773
5774         SCTP_WQ_ADDR_DESTROY();
5775
5776         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5777         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5778         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5779         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5780         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5781         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5782         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5783         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5784         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5785         /* Get rid of other stuff to */
5786         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5787                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5788         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5789                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5790         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5791                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5792
5793 }
5794
5795
5796 int
5797 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5798     int iphlen, int offset, int limit, struct sctphdr *sh,
5799     struct sockaddr *altsa)
5800 {
5801         /*
5802          * grub through the INIT pulling addresses and loading them to the
5803          * nets structure in the asoc. The from address in the mbuf should
5804          * also be loaded (if it is not already). This routine can be called
5805          * with either INIT or INIT-ACK's as long as the m points to the IP
5806          * packet and the offset points to the beginning of the parameters.
5807          */
5808         struct sctp_inpcb *inp, *l_inp;
5809         struct sctp_nets *net, *net_tmp;
5810         struct ip *iph;
5811         struct sctp_paramhdr *phdr, parm_buf;
5812         struct sctp_tcb *stcb_tmp;
5813         uint16_t ptype, plen;
5814         struct sockaddr *sa;
5815         struct sockaddr_storage dest_store;
5816         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5817         struct sockaddr_in sin;
5818         struct sockaddr_in6 sin6;
5819         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5820         struct sctp_auth_random *p_random = NULL;
5821         uint16_t random_len = 0;
5822         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5823         struct sctp_auth_hmac_algo *hmacs = NULL;
5824         uint16_t hmacs_len = 0;
5825         uint8_t saw_asconf = 0;
5826         uint8_t saw_asconf_ack = 0;
5827         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5828         struct sctp_auth_chunk_list *chunks = NULL;
5829         uint16_t num_chunks = 0;
5830         sctp_key_t *new_key;
5831         uint32_t keylen;
5832         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5833
5834         /* First get the destination address setup too. */
5835         memset(&sin, 0, sizeof(sin));
5836         memset(&sin6, 0, sizeof(sin6));
5837
5838         sin.sin_family = AF_INET;
5839         sin.sin_len = sizeof(sin);
5840         sin.sin_port = stcb->rport;
5841
5842         sin6.sin6_family = AF_INET6;
5843         sin6.sin6_len = sizeof(struct sockaddr_in6);
5844         sin6.sin6_port = stcb->rport;
5845         if (altsa == NULL) {
5846                 iph = mtod(m, struct ip *);
5847                 switch (iph->ip_v) {
5848                 case IPVERSION:
5849                         {
5850                                 /* its IPv4 */
5851                                 struct sockaddr_in *sin_2;
5852
5853                                 sin_2 = (struct sockaddr_in *)(local_sa);
5854                                 memset(sin_2, 0, sizeof(sin));
5855                                 sin_2->sin_family = AF_INET;
5856                                 sin_2->sin_len = sizeof(sin);
5857                                 sin_2->sin_port = sh->dest_port;
5858                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5859                                 sin.sin_addr = iph->ip_src;
5860                                 sa = (struct sockaddr *)&sin;
5861                                 break;
5862                         }
5863 #ifdef INET6
5864                 case IPV6_VERSION >> 4:
5865                         {
5866                                 /* its IPv6 */
5867                                 struct ip6_hdr *ip6;
5868                                 struct sockaddr_in6 *sin6_2;
5869
5870                                 ip6 = mtod(m, struct ip6_hdr *);
5871                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5872                                 memset(sin6_2, 0, sizeof(sin6));
5873                                 sin6_2->sin6_family = AF_INET6;
5874                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5875                                 sin6_2->sin6_port = sh->dest_port;
5876                                 sin6.sin6_addr = ip6->ip6_src;
5877                                 sa = (struct sockaddr *)&sin6;
5878                                 break;
5879                         }
5880 #endif
5881                 default:
5882                         sa = NULL;
5883                         break;
5884                 }
5885         } else {
5886                 /*
5887                  * For cookies we use the src address NOT from the packet
5888                  * but from the original INIT
5889                  */
5890                 sa = altsa;
5891         }
5892         /* Turn off ECN until we get through all params */
5893         stcb->asoc.ecn_allowed = 0;
5894         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5895                 /* mark all addresses that we have currently on the list */
5896                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5897         }
5898         /* does the source address already exist? if so skip it */
5899         l_inp = inp = stcb->sctp_ep;
5900
5901         atomic_add_int(&stcb->asoc.refcnt, 1);
5902         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5903         atomic_add_int(&stcb->asoc.refcnt, -1);
5904
5905         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5906                 /* we must add the source address */
5907                 /* no scope set here since we have a tcb already. */
5908                 if ((sa->sa_family == AF_INET) &&
5909                     (stcb->asoc.ipv4_addr_legal)) {
5910                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5911                                 return (-1);
5912                         }
5913                 } else if ((sa->sa_family == AF_INET6) &&
5914                     (stcb->asoc.ipv6_addr_legal)) {
5915                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5916                                 return (-2);
5917                         }
5918                 }
5919         } else {
5920                 if (net_tmp != NULL && stcb_tmp == stcb) {
5921                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5922                 } else if (stcb_tmp != stcb) {
5923                         /* It belongs to another association? */
5924                         if (stcb_tmp)
5925                                 SCTP_TCB_UNLOCK(stcb_tmp);
5926                         return (-3);
5927                 }
5928         }
5929         if (stcb->asoc.state == 0) {
5930                 /* the assoc was freed? */
5931                 return (-4);
5932         }
5933         /*
5934          * peer must explicitly turn this on. This may have been initialized
5935          * to be "on" in order to allow local addr changes while INIT's are
5936          * in flight.
5937          */
5938         stcb->asoc.peer_supports_asconf = 0;
5939         /* now we must go through each of the params. */
5940         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5941         while (phdr) {
5942                 ptype = ntohs(phdr->param_type);
5943                 plen = ntohs(phdr->param_length);
5944                 /*
5945                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5946                  * (int)plen);
5947                  */
5948                 if (offset + plen > limit) {
5949                         break;
5950                 }
5951                 if (plen == 0) {
5952                         break;
5953                 }
5954                 if (ptype == SCTP_IPV4_ADDRESS) {
5955                         if (stcb->asoc.ipv4_addr_legal) {
5956                                 struct sctp_ipv4addr_param *p4, p4_buf;
5957
5958                                 /* ok get the v4 address and check/add */
5959                                 phdr = sctp_get_next_param(m, offset,
5960                                     (struct sctp_paramhdr *)&p4_buf,
5961                                     sizeof(p4_buf));
5962                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5963                                     phdr == NULL) {
5964                                         return (-5);
5965                                 }
5966                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5967                                 sin.sin_addr.s_addr = p4->addr;
5968                                 if (IN_MULTICAST(sin.sin_addr.s_addr)) {
5969                                         /* Skip multi-cast addresses */
5970                                         goto next_param;
5971                                 }
5972                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5973                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5974                                         goto next_param;
5975                                 }
5976                                 sa = (struct sockaddr *)&sin;
5977                                 inp = stcb->sctp_ep;
5978                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5979                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5980                                     local_sa, stcb);
5981                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5982
5983                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
5984                                     inp == NULL) {
5985                                         /* we must add the source address */
5986                                         /*
5987                                          * no scope set since we have a tcb
5988                                          * already
5989                                          */
5990
5991                                         /*
5992                                          * we must validate the state again
5993                                          * here
5994                                          */
5995                         add_it_now:
5996                                         if (stcb->asoc.state == 0) {
5997                                                 /* the assoc was freed? */
5998                                                 return (-7);
5999                                         }
6000                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6001                                                 return (-8);
6002                                         }
6003                                 } else if (stcb_tmp == stcb) {
6004                                         if (stcb->asoc.state == 0) {
6005                                                 /* the assoc was freed? */
6006                                                 return (-10);
6007                                         }
6008                                         if (net != NULL) {
6009                                                 /* clear flag */
6010                                                 net->dest_state &=
6011                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6012                                         }
6013                                 } else {
6014                                         /*
6015                                          * strange, address is in another
6016                                          * assoc? straighten out locks.
6017                                          */
6018                                         if (stcb_tmp) {
6019                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6020                                                         /*
6021                                                          * in setup state we
6022                                                          * abort this guy
6023                                                          */
6024                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6025                                                             stcb_tmp, 1, NULL, 0);
6026                                                         goto add_it_now;
6027                                                 }
6028                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6029                                         }
6030                                         if (stcb->asoc.state == 0) {
6031                                                 /* the assoc was freed? */
6032                                                 return (-12);
6033                                         }
6034                                         return (-13);
6035                                 }
6036                         }
6037                 } else if (ptype == SCTP_IPV6_ADDRESS) {
6038                         if (stcb->asoc.ipv6_addr_legal) {
6039                                 /* ok get the v6 address and check/add */
6040                                 struct sctp_ipv6addr_param *p6, p6_buf;
6041
6042                                 phdr = sctp_get_next_param(m, offset,
6043                                     (struct sctp_paramhdr *)&p6_buf,
6044                                     sizeof(p6_buf));
6045                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6046                                     phdr == NULL) {
6047                                         return (-14);
6048                                 }
6049                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6050                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6051                                     sizeof(p6->addr));
6052                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6053                                         /* Skip multi-cast addresses */
6054                                         goto next_param;
6055                                 }
6056                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6057                                         /*
6058                                          * Link local make no sense without
6059                                          * scope
6060                                          */
6061                                         goto next_param;
6062                                 }
6063                                 sa = (struct sockaddr *)&sin6;
6064                                 inp = stcb->sctp_ep;
6065                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6066                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6067                                     local_sa, stcb);
6068                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6069                                 if (stcb_tmp == NULL &&
6070                                     (inp == stcb->sctp_ep || inp == NULL)) {
6071                                         /*
6072                                          * we must validate the state again
6073                                          * here
6074                                          */
6075                         add_it_now6:
6076                                         if (stcb->asoc.state == 0) {
6077                                                 /* the assoc was freed? */
6078                                                 return (-16);
6079                                         }
6080                                         /*
6081                                          * we must add the address, no scope
6082                                          * set
6083                                          */
6084                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6085                                                 return (-17);
6086                                         }
6087                                 } else if (stcb_tmp == stcb) {
6088                                         /*
6089                                          * we must validate the state again
6090                                          * here
6091                                          */
6092                                         if (stcb->asoc.state == 0) {
6093                                                 /* the assoc was freed? */
6094                                                 return (-19);
6095                                         }
6096                                         if (net != NULL) {
6097                                                 /* clear flag */
6098                                                 net->dest_state &=
6099                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6100                                         }
6101                                 } else {
6102                                         /*
6103                                          * strange, address is in another
6104                                          * assoc? straighten out locks.
6105                                          */
6106                                         if (stcb_tmp)
6107                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6108                                                         /*
6109                                                          * in setup state we
6110                                                          * abort this guy
6111                                                          */
6112                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6113                                                             stcb_tmp, 1, NULL, 0);
6114                                                         goto add_it_now6;
6115                                                 }
6116                                         SCTP_TCB_UNLOCK(stcb_tmp);
6117
6118                                         if (stcb->asoc.state == 0) {
6119                                                 /* the assoc was freed? */
6120                                                 return (-21);
6121                                         }
6122                                         return (-22);
6123                                 }
6124                         }
6125                 } else if (ptype == SCTP_ECN_CAPABLE) {
6126                         stcb->asoc.ecn_allowed = 1;
6127                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6128                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6129                                 struct sctp_adaptation_layer_indication ai,
6130                                                                 *aip;
6131
6132                                 phdr = sctp_get_next_param(m, offset,
6133                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6134                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6135                                 if (aip) {
6136                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6137                                         stcb->asoc.adaptation_needed = 1;
6138                                 }
6139                         }
6140                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6141                         struct sctp_asconf_addr_param lstore, *fee;
6142                         struct sctp_asconf_addrv4_param *fii;
6143                         int lptype;
6144                         struct sockaddr *lsa = NULL;
6145
6146                         stcb->asoc.peer_supports_asconf = 1;
6147                         if (plen > sizeof(lstore)) {
6148                                 return (-23);
6149                         }
6150                         phdr = sctp_get_next_param(m, offset,
6151                             (struct sctp_paramhdr *)&lstore,
6152                             min(plen, sizeof(lstore)));
6153                         if (phdr == NULL) {
6154                                 return (-24);
6155                         }
6156                         fee = (struct sctp_asconf_addr_param *)phdr;
6157                         lptype = ntohs(fee->addrp.ph.param_type);
6158                         if (lptype == SCTP_IPV4_ADDRESS) {
6159                                 if (plen !=
6160                                     sizeof(struct sctp_asconf_addrv4_param)) {
6161                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6162                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6163                                             plen);
6164                                 } else {
6165                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6166                                         sin.sin_addr.s_addr = fii->addrp.addr;
6167                                         lsa = (struct sockaddr *)&sin;
6168                                 }
6169                         } else if (lptype == SCTP_IPV6_ADDRESS) {
6170                                 if (plen !=
6171                                     sizeof(struct sctp_asconf_addr_param)) {
6172                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6173                                             (int)sizeof(struct sctp_asconf_addr_param),
6174                                             plen);
6175                                 } else {
6176                                         memcpy(sin6.sin6_addr.s6_addr,
6177                                             fee->addrp.addr,
6178                                             sizeof(fee->addrp.addr));
6179                                         lsa = (struct sockaddr *)&sin6;
6180                                 }
6181                         }
6182                         if (lsa) {
6183                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6184                         }
6185                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6186                         stcb->asoc.peer_supports_nat = 1;
6187                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6188                         /* Peer supports pr-sctp */
6189                         stcb->asoc.peer_supports_prsctp = 1;
6190                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6191                         /* A supported extension chunk */
6192                         struct sctp_supported_chunk_types_param *pr_supported;
6193                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6194                         int num_ent, i;
6195
6196                         phdr = sctp_get_next_param(m, offset,
6197                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6198                         if (phdr == NULL) {
6199                                 return (-25);
6200                         }
6201                         stcb->asoc.peer_supports_asconf = 0;
6202                         stcb->asoc.peer_supports_prsctp = 0;
6203                         stcb->asoc.peer_supports_pktdrop = 0;
6204                         stcb->asoc.peer_supports_strreset = 0;
6205                         stcb->asoc.peer_supports_nr_sack = 0;
6206                         stcb->asoc.peer_supports_auth = 0;
6207                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6208                         num_ent = plen - sizeof(struct sctp_paramhdr);
6209                         for (i = 0; i < num_ent; i++) {
6210                                 switch (pr_supported->chunk_types[i]) {
6211                                 case SCTP_ASCONF:
6212                                 case SCTP_ASCONF_ACK:
6213                                         stcb->asoc.peer_supports_asconf = 1;
6214                                         break;
6215                                 case SCTP_FORWARD_CUM_TSN:
6216                                         stcb->asoc.peer_supports_prsctp = 1;
6217                                         break;
6218                                 case SCTP_PACKET_DROPPED:
6219                                         stcb->asoc.peer_supports_pktdrop = 1;
6220                                         break;
6221                                 case SCTP_NR_SELECTIVE_ACK:
6222                                         if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
6223                                                 stcb->asoc.peer_supports_nr_sack = 1;
6224                                         else
6225                                                 stcb->asoc.peer_supports_nr_sack = 0;
6226                                         break;
6227                                 case SCTP_STREAM_RESET:
6228                                         stcb->asoc.peer_supports_strreset = 1;
6229                                         break;
6230                                 case SCTP_AUTHENTICATION:
6231                                         stcb->asoc.peer_supports_auth = 1;
6232                                         break;
6233                                 default:
6234                                         /* one I have not learned yet */
6235                                         break;
6236
6237                                 }
6238                         }
6239                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6240                         /* Peer supports ECN-nonce */
6241                         stcb->asoc.peer_supports_ecn_nonce = 1;
6242                         stcb->asoc.ecn_nonce_allowed = 1;
6243                 } else if (ptype == SCTP_RANDOM) {
6244                         if (plen > sizeof(random_store))
6245                                 break;
6246                         if (got_random) {
6247                                 /* already processed a RANDOM */
6248                                 goto next_param;
6249                         }
6250                         phdr = sctp_get_next_param(m, offset,
6251                             (struct sctp_paramhdr *)random_store,
6252                             min(sizeof(random_store), plen));
6253                         if (phdr == NULL)
6254                                 return (-26);
6255                         p_random = (struct sctp_auth_random *)phdr;
6256                         random_len = plen - sizeof(*p_random);
6257                         /* enforce the random length */
6258                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6259                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6260                                 return (-27);
6261                         }
6262                         got_random = 1;
6263                 } else if (ptype == SCTP_HMAC_LIST) {
6264                         int num_hmacs;
6265                         int i;
6266
6267                         if (plen > sizeof(hmacs_store))
6268                                 break;
6269                         if (got_hmacs) {
6270                                 /* already processed a HMAC list */
6271                                 goto next_param;
6272                         }
6273                         phdr = sctp_get_next_param(m, offset,
6274                             (struct sctp_paramhdr *)hmacs_store,
6275                             min(plen, sizeof(hmacs_store)));
6276                         if (phdr == NULL)
6277                                 return (-28);
6278                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6279                         hmacs_len = plen - sizeof(*hmacs);
6280                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6281                         /* validate the hmac list */
6282                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6283                                 return (-29);
6284                         }
6285                         if (stcb->asoc.peer_hmacs != NULL)
6286                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6287                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6288                         if (stcb->asoc.peer_hmacs != NULL) {
6289                                 for (i = 0; i < num_hmacs; i++) {
6290                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6291                                             ntohs(hmacs->hmac_ids[i]));
6292                                 }
6293                         }
6294                         got_hmacs = 1;
6295                 } else if (ptype == SCTP_CHUNK_LIST) {
6296                         int i;
6297
6298                         if (plen > sizeof(chunks_store))
6299                                 break;
6300                         if (got_chklist) {
6301                                 /* already processed a Chunks list */
6302                                 goto next_param;
6303                         }
6304                         phdr = sctp_get_next_param(m, offset,
6305                             (struct sctp_paramhdr *)chunks_store,
6306                             min(plen, sizeof(chunks_store)));
6307                         if (phdr == NULL)
6308                                 return (-30);
6309                         chunks = (struct sctp_auth_chunk_list *)phdr;
6310                         num_chunks = plen - sizeof(*chunks);
6311                         if (stcb->asoc.peer_auth_chunks != NULL)
6312                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6313                         else
6314                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6315                         for (i = 0; i < num_chunks; i++) {
6316                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6317                                     stcb->asoc.peer_auth_chunks);
6318                                 /* record asconf/asconf-ack if listed */
6319                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6320                                         saw_asconf = 1;
6321                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6322                                         saw_asconf_ack = 1;
6323
6324                         }
6325                         got_chklist = 1;
6326                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6327                             (ptype == SCTP_STATE_COOKIE) ||
6328                             (ptype == SCTP_UNRECOG_PARAM) ||
6329                             (ptype == SCTP_COOKIE_PRESERVE) ||
6330                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6331                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6332                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6333                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6334                     (ptype == SCTP_SUCCESS_REPORT)) {
6335                          /* don't care */ ;
6336                 } else {
6337                         if ((ptype & 0x8000) == 0x0000) {
6338                                 /*
6339                                  * must stop processing the rest of the
6340                                  * param's. Any report bits were handled
6341                                  * with the call to
6342                                  * sctp_arethere_unrecognized_parameters()
6343                                  * when the INIT or INIT-ACK was first seen.
6344                                  */
6345                                 break;
6346                         }
6347                 }
6348
6349 next_param:
6350                 offset += SCTP_SIZE32(plen);
6351                 if (offset >= limit) {
6352                         break;
6353                 }
6354                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6355                     sizeof(parm_buf));
6356         }
6357         /* Now check to see if we need to purge any addresses */
6358         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6359                 net_tmp = TAILQ_NEXT(net, sctp_next);
6360                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6361                     SCTP_ADDR_NOT_IN_ASSOC) {
6362                         /* This address has been removed from the asoc */
6363                         /* remove and free it */
6364                         stcb->asoc.numnets--;
6365                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6366                         sctp_free_remote_addr(net);
6367                         if (net == stcb->asoc.primary_destination) {
6368                                 stcb->asoc.primary_destination = NULL;
6369                                 sctp_select_primary_destination(stcb);
6370                         }
6371                 }
6372         }
6373         /* validate authentication required parameters */
6374         if (got_random && got_hmacs) {
6375                 stcb->asoc.peer_supports_auth = 1;
6376         } else {
6377                 stcb->asoc.peer_supports_auth = 0;
6378         }
6379         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6380                 /* peer does not support auth but sent a chunks list? */
6381                 return (-31);
6382         }
6383         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6384             !stcb->asoc.peer_supports_auth) {
6385                 /* peer supports asconf but not auth? */
6386                 return (-32);
6387         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6388             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6389                 return (-33);
6390         }
6391         /* concatenate the full random key */
6392         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6393         if (chunks != NULL) {
6394                 keylen += sizeof(*chunks) + num_chunks;
6395         }
6396         new_key = sctp_alloc_key(keylen);
6397         if (new_key != NULL) {
6398                 /* copy in the RANDOM */
6399                 if (p_random != NULL) {
6400                         keylen = sizeof(*p_random) + random_len;
6401                         bcopy(p_random, new_key->key, keylen);
6402                 }
6403                 /* append in the AUTH chunks */
6404                 if (chunks != NULL) {
6405                         bcopy(chunks, new_key->key + keylen,
6406                             sizeof(*chunks) + num_chunks);
6407                         keylen += sizeof(*chunks) + num_chunks;
6408                 }
6409                 /* append in the HMACs */
6410                 if (hmacs != NULL) {
6411                         bcopy(hmacs, new_key->key + keylen,
6412                             sizeof(*hmacs) + hmacs_len);
6413                 }
6414         } else {
6415                 /* failed to get memory for the key */
6416                 return (-34);
6417         }
6418         if (stcb->asoc.authinfo.peer_random != NULL)
6419                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6420         stcb->asoc.authinfo.peer_random = new_key;
6421         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6422         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6423
6424         return (0);
6425 }
6426
6427 int
6428 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6429     struct sctp_nets *net)
6430 {
6431         /* make sure the requested primary address exists in the assoc */
6432         if (net == NULL && sa)
6433                 net = sctp_findnet(stcb, sa);
6434
6435         if (net == NULL) {
6436                 /* didn't find the requested primary address! */
6437                 return (-1);
6438         } else {
6439                 /* set the primary address */
6440                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6441                         /* Must be confirmed, so queue to set */
6442                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6443                         return (0);
6444                 }
6445                 stcb->asoc.primary_destination = net;
6446                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6447                 net = TAILQ_FIRST(&stcb->asoc.nets);
6448                 if (net != stcb->asoc.primary_destination) {
6449                         /*
6450                          * first one on the list is NOT the primary
6451                          * sctp_cmpaddr() is much more efficent if the
6452                          * primary is the first on the list, make it so.
6453                          */
6454                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6455                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6456                 }
6457                 return (0);
6458         }
6459 }
6460
6461 int
6462 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6463 {
6464         /*
6465          * This function serves two purposes. It will see if a TAG can be
6466          * re-used and return 1 for yes it is ok and 0 for don't use that
6467          * tag. A secondary function it will do is purge out old tags that
6468          * can be removed.
6469          */
6470         struct sctpvtaghead *chain;
6471         struct sctp_tagblock *twait_block;
6472         struct sctpasochead *head;
6473         struct sctp_tcb *stcb;
6474         int i;
6475
6476         SCTP_INP_INFO_RLOCK();
6477         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6478             SCTP_BASE_INFO(hashasocmark))];
6479         if (head == NULL) {
6480                 /* invalid vtag */
6481                 goto skip_vtag_check;
6482         }
6483         LIST_FOREACH(stcb, head, sctp_asocs) {
6484                 /*
6485                  * We choose not to lock anything here. TCB's can't be
6486                  * removed since we have the read lock, so they can't be
6487                  * freed on us, same thing for the INP. I may be wrong with
6488                  * this assumption, but we will go with it for now :-)
6489                  */
6490                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6491                         continue;
6492                 }
6493                 if (stcb->asoc.my_vtag == tag) {
6494                         /* candidate */
6495                         if (stcb->rport != rport) {
6496                                 continue;
6497                         }
6498                         if (stcb->sctp_ep->sctp_lport != lport) {
6499                                 continue;
6500                         }
6501                         /* Its a used tag set */
6502                         SCTP_INP_INFO_RUNLOCK();
6503                         return (0);
6504                 }
6505         }
6506 skip_vtag_check:
6507
6508         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6509         /* Now what about timed wait ? */
6510         if (!LIST_EMPTY(chain)) {
6511                 /*
6512                  * Block(s) are present, lets see if we have this tag in the
6513                  * list
6514                  */
6515                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6516                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6517                                 if (twait_block->vtag_block[i].v_tag == 0) {
6518                                         /* not used */
6519                                         continue;
6520                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6521                                     now->tv_sec) {
6522                                         /* Audit expires this guy */
6523                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6524                                         twait_block->vtag_block[i].v_tag = 0;
6525                                         twait_block->vtag_block[i].lport = 0;
6526                                         twait_block->vtag_block[i].rport = 0;
6527                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6528                                             (twait_block->vtag_block[i].lport == lport) &&
6529                                     (twait_block->vtag_block[i].rport == rport)) {
6530                                         /* Bad tag, sorry :< */
6531                                         SCTP_INP_INFO_RUNLOCK();
6532                                         return (0);
6533                                 }
6534                         }
6535                 }
6536         }
6537         SCTP_INP_INFO_RUNLOCK();
6538         return (1);
6539 }
6540
6541
6542 static sctp_assoc_t reneged_asoc_ids[256];
6543 static uint8_t reneged_at = 0;
6544
6545
6546 static void
6547 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6548 {
6549         /*
6550          * We must hunt this association for MBUF's past the cumack (i.e.
6551          * out of order data that we can renege on).
6552          */
6553         struct sctp_association *asoc;
6554         struct sctp_tmit_chunk *chk, *nchk;
6555         uint32_t cumulative_tsn_p1;
6556         struct sctp_queued_to_read *ctl, *nctl;
6557         int cnt, strmat;
6558         uint32_t gap, i;
6559         int fnd = 0;
6560
6561         /* We look for anything larger than the cum-ack + 1 */
6562
6563         asoc = &stcb->asoc;
6564         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6565                 /* none we can reneg on. */
6566                 return;
6567         }
6568         SCTP_STAT_INCR(sctps_protocol_drains_done);
6569         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6570         cnt = 0;
6571         /* First look in the re-assembly queue */
6572         chk = TAILQ_FIRST(&asoc->reasmqueue);
6573         while (chk) {
6574                 /* Get the next one */
6575                 nchk = TAILQ_NEXT(chk, sctp_next);
6576                 if (compare_with_wrap(chk->rec.data.TSN_seq,
6577                     cumulative_tsn_p1, MAX_TSN)) {
6578                         /* Yep it is above cum-ack */
6579                         cnt++;
6580                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6581                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6582                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6583                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6584                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6585                         if (chk->data) {
6586                                 sctp_m_freem(chk->data);
6587                                 chk->data = NULL;
6588                         }
6589                         sctp_free_a_chunk(stcb, chk);
6590                 }
6591                 chk = nchk;
6592         }
6593         /* Ok that was fun, now we will drain all the inbound streams? */
6594         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6595                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6596                 while (ctl) {
6597                         nctl = TAILQ_NEXT(ctl, next);
6598                         if (compare_with_wrap(ctl->sinfo_tsn,
6599                             cumulative_tsn_p1, MAX_TSN)) {
6600                                 /* Yep it is above cum-ack */
6601                                 cnt++;
6602                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6603                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6604                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6605                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6606                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6607                                 if (ctl->data) {
6608                                         sctp_m_freem(ctl->data);
6609                                         ctl->data = NULL;
6610                                 }
6611                                 sctp_free_remote_addr(ctl->whoFrom);
6612                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6613                                 SCTP_DECR_READQ_COUNT();
6614                         }
6615                         ctl = nctl;
6616                 }
6617         }
6618         if (cnt) {
6619                 /* We must back down to see what the new highest is */
6620                 for (i = asoc->highest_tsn_inside_map;
6621                     (compare_with_wrap(i, asoc->mapping_array_base_tsn, MAX_TSN) || (i == asoc->mapping_array_base_tsn));
6622                     i--) {
6623                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6624                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6625                                 asoc->highest_tsn_inside_map = i;
6626                                 fnd = 1;
6627                                 break;
6628                         }
6629                 }
6630                 if (!fnd) {
6631                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6632                 }
6633                 /*
6634                  * Question, should we go through the delivery queue? The
6635                  * only reason things are on here is the app not reading OR
6636                  * a p-d-api up. An attacker COULD send enough in to
6637                  * initiate the PD-API and then send a bunch of stuff to
6638                  * other streams... these would wind up on the delivery
6639                  * queue.. and then we would not get to them. But in order
6640                  * to do this I then have to back-track and un-deliver
6641                  * sequence numbers in streams.. el-yucko. I think for now
6642                  * we will NOT look at the delivery queue and leave it to be
6643                  * something to consider later. An alternative would be to
6644                  * abort the P-D-API with a notification and then deliver
6645                  * the data.... Or another method might be to keep track of
6646                  * how many times the situation occurs and if we see a
6647                  * possible attack underway just abort the association.
6648                  */
6649 #ifdef SCTP_DEBUG
6650                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6651 #endif
6652                 /*
6653                  * Now do we need to find a new
6654                  * asoc->highest_tsn_inside_map?
6655                  */
6656                 asoc->last_revoke_count = cnt;
6657                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6658                 /* sa_ignore NO_NULL_CHK */
6659                 sctp_send_sack(stcb);
6660                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6661                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6662                 reneged_at++;
6663         }
6664         /*
6665          * Another issue, in un-setting the TSN's in the mapping array we
6666          * DID NOT adjust the higest_tsn marker.  This will cause one of two
6667          * things to occur. It may cause us to do extra work in checking for
6668          * our mapping array movement. More importantly it may cause us to
6669          * SACK every datagram. This may not be a bad thing though since we
6670          * will recover once we get our cum-ack above and all this stuff we
6671          * dumped recovered.
6672          */
6673 }
6674
6675 void
6676 sctp_drain()
6677 {
6678         /*
6679          * We must walk the PCB lists for ALL associations here. The system
6680          * is LOW on MBUF's and needs help. This is where reneging will
6681          * occur. We really hope this does NOT happen!
6682          */
6683         VNET_ITERATOR_DECL(vnet_iter);
6684         VNET_LIST_RLOCK_NOSLEEP();
6685         VNET_FOREACH(vnet_iter) {
6686                 CURVNET_SET(vnet_iter);
6687                 struct sctp_inpcb *inp;
6688                 struct sctp_tcb *stcb;
6689
6690                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6691                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6692 #ifdef VIMAGE
6693                         continue;
6694 #else
6695                         return;
6696 #endif
6697                 }
6698                 SCTP_INP_INFO_RLOCK();
6699                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6700                         /* For each endpoint */
6701                         SCTP_INP_RLOCK(inp);
6702                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6703                                 /* For each association */
6704                                 SCTP_TCB_LOCK(stcb);
6705                                 sctp_drain_mbufs(inp, stcb);
6706                                 SCTP_TCB_UNLOCK(stcb);
6707                         }
6708                         SCTP_INP_RUNLOCK(inp);
6709                 }
6710                 SCTP_INP_INFO_RUNLOCK();
6711                 CURVNET_RESTORE();
6712         }
6713         VNET_LIST_RUNLOCK_NOSLEEP();
6714 }
6715
6716 /*
6717  * start a new iterator
6718  * iterates through all endpoints and associations based on the pcb_state
6719  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6720  * assocs and "ef" (optional) is executed when the iterator completes.
6721  * "inpf" (optional) is executed for each new endpoint as it is being
6722  * iterated through. inpe (optional) is called when the inp completes
6723  * its way through all the stcbs.
6724  */
6725 int
6726 sctp_initiate_iterator(inp_func inpf,
6727     asoc_func af,
6728     inp_func inpe,
6729     uint32_t pcb_state,
6730     uint32_t pcb_features,
6731     uint32_t asoc_state,
6732     void *argp,
6733     uint32_t argi,
6734     end_func ef,
6735     struct sctp_inpcb *s_inp,
6736     uint8_t chunk_output_off)
6737 {
6738         struct sctp_iterator *it = NULL;
6739
6740         if (af == NULL) {
6741                 return (-1);
6742         }
6743         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6744             SCTP_M_ITER);
6745         if (it == NULL) {
6746                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6747                 return (ENOMEM);
6748         }
6749         memset(it, 0, sizeof(*it));
6750         it->function_assoc = af;
6751         it->function_inp = inpf;
6752         if (inpf)
6753                 it->done_current_ep = 0;
6754         else
6755                 it->done_current_ep = 1;
6756         it->function_atend = ef;
6757         it->pointer = argp;
6758         it->val = argi;
6759         it->pcb_flags = pcb_state;
6760         it->pcb_features = pcb_features;
6761         it->asoc_state = asoc_state;
6762         it->function_inp_end = inpe;
6763         it->no_chunk_output = chunk_output_off;
6764         it->vn = curvnet;
6765         if (s_inp) {
6766                 /* Assume lock is held here */
6767                 it->inp = s_inp;
6768                 SCTP_INP_INCR_REF(it->inp);
6769                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6770         } else {
6771                 SCTP_INP_INFO_RLOCK();
6772                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6773                 if (it->inp) {
6774                         SCTP_INP_INCR_REF(it->inp);
6775                 }
6776                 SCTP_INP_INFO_RUNLOCK();
6777                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6778
6779         }
6780         SCTP_IPI_ITERATOR_WQ_LOCK();
6781
6782         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6783         if (sctp_it_ctl.iterator_running == 0) {
6784                 sctp_wakeup_iterator();
6785         }
6786         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6787         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6788         return (0);
6789 }