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 separate 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 that's 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 length %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 length %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");
 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, remove the
 571                                  * 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 | rport), 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          * Endpoint 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         unsigned int i;
1775
1776         if (nam->sa_family == AF_INET) {
1777                 sin = (struct sockaddr_in *)nam;
1778                 lport = ((struct sockaddr_in *)nam)->sin_port;
1779         } else if (nam->sa_family == AF_INET6) {
1780                 sin6 = (struct sockaddr_in6 *)nam;
1781                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1782         } else {
1783                 /* unsupported family */
1784                 return (NULL);
1785         }
1786         /*
1787          * I could cheat here and just cast to one of the types but we will
1788          * do it right. It also provides the check against an Unsupported
1789          * type too.
1790          */
1791         /* Find the head of the ALLADDR chain */
1792         if (have_lock == 0) {
1793                 SCTP_INP_INFO_RLOCK();
1794         }
1795         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1796             SCTP_BASE_INFO(hashmark))];
1797         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1798
1799         /*
1800          * If the TCP model exists it could be that the main listening
1801          * endpoint is gone but there still exists a connected socket for
1802          * this guy. If so we can return the first one that we find. This
1803          * may NOT be the correct one so the caller should be wary on the
1804          * returned INP. Currently the only caller that sets find_tcp_pool
1805          * is in bindx where we are verifying that a user CAN bind the
1806          * address. He either has bound it already, or someone else has, or
1807          * its open to bind, so this is good enough.
1808          */
1809         if (inp == NULL && find_tcp_pool) {
1810                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1811                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1812                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1813                         if (inp) {
1814                                 break;
1815                         }
1816                 }
1817         }
1818         if (inp) {
1819                 SCTP_INP_INCR_REF(inp);
1820         }
1821         if (have_lock == 0) {
1822                 SCTP_INP_INFO_RUNLOCK();
1823         }
1824         return (inp);
1825 }
1826
1827 /*
1828  * Find an association for an endpoint with the pointer to whom you want to
1829  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1830  * need to change the *to to some other struct like a mbuf...
1831  */
1832 struct sctp_tcb *
1833 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1834     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1835     uint32_t vrf_id)
1836 {
1837         struct sctp_inpcb *inp = NULL;
1838         struct sctp_tcb *retval;
1839
1840         SCTP_INP_INFO_RLOCK();
1841         if (find_tcp_pool) {
1842                 if (inp_p != NULL) {
1843                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1844                             vrf_id);
1845                 } else {
1846                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1847                             vrf_id);
1848                 }
1849                 if (retval != NULL) {
1850                         SCTP_INP_INFO_RUNLOCK();
1851                         return (retval);
1852                 }
1853         }
1854         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1855         if (inp_p != NULL) {
1856                 *inp_p = inp;
1857         }
1858         SCTP_INP_INFO_RUNLOCK();
1859
1860         if (inp == NULL) {
1861                 return (NULL);
1862         }
1863         /*
1864          * ok, we have an endpoint, now lets find the assoc for it (if any)
1865          * we now place the source address or from in the to of the find
1866          * endpoint call. Since in reality this chain is used from the
1867          * inbound packet side.
1868          */
1869         if (inp_p != NULL) {
1870                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1871                     NULL);
1872         } else {
1873                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1874                     NULL);
1875         }
1876         return retval;
1877 }
1878
1879
1880 /*
1881  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1882  * find all addresses that the sender has specified in any address list. Each
1883  * address will be used to lookup the TCB and see if one exits.
1884  */
1885 static struct sctp_tcb *
1886 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1887     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1888     struct sockaddr *dest)
1889 {
1890         struct sockaddr_in sin4;
1891         struct sockaddr_in6 sin6;
1892         struct sctp_paramhdr *phdr, parm_buf;
1893         struct sctp_tcb *retval;
1894         uint32_t ptype, plen;
1895
1896         memset(&sin4, 0, sizeof(sin4));
1897         memset(&sin6, 0, sizeof(sin6));
1898         sin4.sin_len = sizeof(sin4);
1899         sin4.sin_family = AF_INET;
1900         sin4.sin_port = sh->src_port;
1901         sin6.sin6_len = sizeof(sin6);
1902         sin6.sin6_family = AF_INET6;
1903         sin6.sin6_port = sh->src_port;
1904
1905         retval = NULL;
1906         offset += sizeof(struct sctp_init_chunk);
1907
1908         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1909         while (phdr != NULL) {
1910                 /* now we must see if we want the parameter */
1911                 ptype = ntohs(phdr->param_type);
1912                 plen = ntohs(phdr->param_length);
1913                 if (plen == 0) {
1914                         break;
1915                 }
1916                 if (ptype == SCTP_IPV4_ADDRESS &&
1917                     plen == sizeof(struct sctp_ipv4addr_param)) {
1918                         /* Get the rest of the address */
1919                         struct sctp_ipv4addr_param ip4_parm, *p4;
1920
1921                         phdr = sctp_get_next_param(m, offset,
1922                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1923                         if (phdr == NULL) {
1924                                 return (NULL);
1925                         }
1926                         p4 = (struct sctp_ipv4addr_param *)phdr;
1927                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1928                         /* look it up */
1929                         retval = sctp_findassociation_ep_addr(inp_p,
1930                             (struct sockaddr *)&sin4, netp, dest, NULL);
1931                         if (retval != NULL) {
1932                                 return (retval);
1933                         }
1934                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1935                     plen == sizeof(struct sctp_ipv6addr_param)) {
1936                         /* Get the rest of the address */
1937                         struct sctp_ipv6addr_param ip6_parm, *p6;
1938
1939                         phdr = sctp_get_next_param(m, offset,
1940                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1941                         if (phdr == NULL) {
1942                                 return (NULL);
1943                         }
1944                         p6 = (struct sctp_ipv6addr_param *)phdr;
1945                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1946                         /* look it up */
1947                         retval = sctp_findassociation_ep_addr(inp_p,
1948                             (struct sockaddr *)&sin6, netp, dest, NULL);
1949                         if (retval != NULL) {
1950                                 return (retval);
1951                         }
1952                 }
1953                 offset += SCTP_SIZE32(plen);
1954                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1955                     sizeof(parm_buf));
1956         }
1957         return (NULL);
1958 }
1959
1960 static struct sctp_tcb *
1961 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1962     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1963     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1964 {
1965         /*
1966          * Use my vtag to hash. If we find it we then verify the source addr
1967          * is in the assoc. If all goes well we save a bit on rec of a
1968          * packet.
1969          */
1970         struct sctpasochead *head;
1971         struct sctp_nets *net;
1972         struct sctp_tcb *stcb;
1973
1974         *netp = NULL;
1975         *inp_p = NULL;
1976         SCTP_INP_INFO_RLOCK();
1977         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1978             SCTP_BASE_INFO(hashasocmark))];
1979         if (head == NULL) {
1980                 /* invalid vtag */
1981                 SCTP_INP_INFO_RUNLOCK();
1982                 return (NULL);
1983         }
1984         LIST_FOREACH(stcb, head, sctp_asocs) {
1985                 SCTP_INP_RLOCK(stcb->sctp_ep);
1986                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1987                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1988                         continue;
1989                 }
1990                 SCTP_TCB_LOCK(stcb);
1991                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1992                 if (stcb->asoc.my_vtag == vtag) {
1993                         /* candidate */
1994                         if (stcb->rport != rport) {
1995                                 SCTP_TCB_UNLOCK(stcb);
1996                                 continue;
1997                         }
1998                         if (stcb->sctp_ep->sctp_lport != lport) {
1999                                 SCTP_TCB_UNLOCK(stcb);
2000                                 continue;
2001                         }
2002                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2003                                 SCTP_TCB_UNLOCK(stcb);
2004                                 continue;
2005                         }
2006                         /* RRS:Need toaddr check here */
2007                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2008                                 /* Endpoint does not own this address */
2009                                 SCTP_TCB_UNLOCK(stcb);
2010                                 continue;
2011                         }
2012                         if (remote_tag) {
2013                                 /*
2014                                  * If we have both vtags that's all we match
2015                                  * on
2016                                  */
2017                                 if (stcb->asoc.peer_vtag == remote_tag) {
2018                                         /*
2019                                          * If both tags match we consider it
2020                                          * conclusive and check NO
2021                                          * source/destination addresses
2022                                          */
2023                                         goto conclusive;
2024                                 }
2025                         }
2026                         if (skip_src_check) {
2027                 conclusive:
2028                                 if (from) {
2029                                         net = sctp_findnet(stcb, from);
2030                                 } else {
2031                                         *netp = NULL;   /* unknown */
2032                                 }
2033                                 if (inp_p)
2034                                         *inp_p = stcb->sctp_ep;
2035                                 SCTP_INP_INFO_RUNLOCK();
2036                                 return (stcb);
2037                         }
2038                         net = sctp_findnet(stcb, from);
2039                         if (net) {
2040                                 /* yep its him. */
2041                                 *netp = net;
2042                                 SCTP_STAT_INCR(sctps_vtagexpress);
2043                                 *inp_p = stcb->sctp_ep;
2044                                 SCTP_INP_INFO_RUNLOCK();
2045                                 return (stcb);
2046                         } else {
2047                                 /*
2048                                  * not him, this should only happen in rare
2049                                  * cases so I peg it.
2050                                  */
2051                                 SCTP_STAT_INCR(sctps_vtagbogus);
2052                         }
2053                 }
2054                 SCTP_TCB_UNLOCK(stcb);
2055         }
2056         SCTP_INP_INFO_RUNLOCK();
2057         return (NULL);
2058 }
2059
2060 /*
2061  * Find an association with the pointer to the inbound IP packet. This can be
2062  * a IPv4 or IPv6 packet.
2063  */
2064 struct sctp_tcb *
2065 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2066     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2067     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2068 {
2069         int find_tcp_pool;
2070         struct ip *iph;
2071         struct sctp_tcb *retval;
2072         struct sockaddr_storage to_store, from_store;
2073         struct sockaddr *to = (struct sockaddr *)&to_store;
2074         struct sockaddr *from = (struct sockaddr *)&from_store;
2075         struct sctp_inpcb *inp;
2076
2077         iph = mtod(m, struct ip *);
2078         switch (iph->ip_v) {
2079         case IPVERSION:
2080                 {
2081                         /* its IPv4 */
2082                         struct sockaddr_in *from4;
2083
2084                         from4 = (struct sockaddr_in *)&from_store;
2085                         bzero(from4, sizeof(*from4));
2086                         from4->sin_family = AF_INET;
2087                         from4->sin_len = sizeof(struct sockaddr_in);
2088                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2089                         from4->sin_port = sh->src_port;
2090                         break;
2091                 }
2092 #ifdef INET6
2093         case IPV6_VERSION >> 4:
2094                 {
2095                         /* its IPv6 */
2096                         struct ip6_hdr *ip6;
2097                         struct sockaddr_in6 *from6;
2098
2099                         ip6 = mtod(m, struct ip6_hdr *);
2100                         from6 = (struct sockaddr_in6 *)&from_store;
2101                         bzero(from6, sizeof(*from6));
2102                         from6->sin6_family = AF_INET6;
2103                         from6->sin6_len = sizeof(struct sockaddr_in6);
2104                         from6->sin6_addr = ip6->ip6_src;
2105                         from6->sin6_port = sh->src_port;
2106                         /* Get the scopes in properly to the sin6 addr's */
2107                         /* we probably don't need these operations */
2108                         (void)sa6_recoverscope(from6);
2109                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2110                         break;
2111                 }
2112 #endif
2113         default:
2114                 /* Currently not supported. */
2115                 return (NULL);
2116         }
2117
2118
2119         switch (iph->ip_v) {
2120         case IPVERSION:
2121                 {
2122                         /* its IPv4 */
2123                         struct sockaddr_in *to4;
2124
2125                         to4 = (struct sockaddr_in *)&to_store;
2126                         bzero(to4, sizeof(*to4));
2127                         to4->sin_family = AF_INET;
2128                         to4->sin_len = sizeof(struct sockaddr_in);
2129                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2130                         to4->sin_port = sh->dest_port;
2131                         break;
2132                 }
2133 #ifdef INET6
2134         case IPV6_VERSION >> 4:
2135                 {
2136                         /* its IPv6 */
2137                         struct ip6_hdr *ip6;
2138                         struct sockaddr_in6 *to6;
2139
2140                         ip6 = mtod(m, struct ip6_hdr *);
2141                         to6 = (struct sockaddr_in6 *)&to_store;
2142                         bzero(to6, sizeof(*to6));
2143                         to6->sin6_family = AF_INET6;
2144                         to6->sin6_len = sizeof(struct sockaddr_in6);
2145                         to6->sin6_addr = ip6->ip6_dst;
2146                         to6->sin6_port = sh->dest_port;
2147                         /* Get the scopes in properly to the sin6 addr's */
2148                         /* we probably don't need these operations */
2149                         (void)sa6_recoverscope(to6);
2150                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2151                         break;
2152                 }
2153 #endif
2154         default:
2155                 /* TSNH */
2156                 break;
2157         }
2158         if (sh->v_tag) {
2159                 /* we only go down this path if vtag is non-zero */
2160                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2161                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2162                 if (retval) {
2163                         return (retval);
2164                 }
2165         }
2166         find_tcp_pool = 0;
2167         if ((ch->chunk_type != SCTP_INITIATION) &&
2168             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2169             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2170             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2171                 /* Other chunk types go to the tcp pool. */
2172                 find_tcp_pool = 1;
2173         }
2174         if (inp_p) {
2175                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2176                     find_tcp_pool, vrf_id);
2177                 inp = *inp_p;
2178         } else {
2179                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2180                     find_tcp_pool, vrf_id);
2181         }
2182         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2183         if (retval == NULL && inp) {
2184                 /* Found a EP but not this address */
2185                 if ((ch->chunk_type == SCTP_INITIATION) ||
2186                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2187                         /*-
2188                          * special hook, we do NOT return linp or an
2189                          * association that is linked to an existing
2190                          * association that is under the TCP pool (i.e. no
2191                          * listener exists). The endpoint finding routine
2192                          * will always find a listener before examining the
2193                          * TCP pool.
2194                          */
2195                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2196                                 if (inp_p) {
2197                                         *inp_p = NULL;
2198                                 }
2199                                 return (NULL);
2200                         }
2201                         retval = sctp_findassociation_special_addr(m, iphlen,
2202                             offset, sh, &inp, netp, to);
2203                         if (inp_p != NULL) {
2204                                 *inp_p = inp;
2205                         }
2206                 }
2207         }
2208         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2209         return (retval);
2210 }
2211
2212 /*
2213  * lookup an association by an ASCONF lookup address.
2214  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2215  */
2216 struct sctp_tcb *
2217 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2218     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2219 {
2220         struct sctp_tcb *stcb;
2221         struct sockaddr_in *sin;
2222
2223 #ifdef INET6
2224         struct sockaddr_in6 *sin6;
2225
2226 #endif
2227         struct sockaddr_storage local_store, remote_store;
2228         struct sockaddr *to;
2229         struct ip *iph;
2230
2231 #ifdef INET6
2232         struct ip6_hdr *ip6;
2233
2234 #endif
2235         struct sctp_paramhdr parm_buf, *phdr;
2236         int ptype;
2237         int zero_address = 0;
2238
2239
2240         memset(&local_store, 0, sizeof(local_store));
2241         memset(&remote_store, 0, sizeof(remote_store));
2242         to = (struct sockaddr *)&local_store;
2243         /* First get the destination address setup too. */
2244         iph = mtod(m, struct ip *);
2245         switch (iph->ip_v) {
2246         case IPVERSION:
2247                 /* its IPv4 */
2248                 sin = (struct sockaddr_in *)&local_store;
2249                 sin->sin_family = AF_INET;
2250                 sin->sin_len = sizeof(*sin);
2251                 sin->sin_port = sh->dest_port;
2252                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2253                 break;
2254 #ifdef INET6
2255         case IPV6_VERSION >> 4:
2256                 /* its IPv6 */
2257                 ip6 = mtod(m, struct ip6_hdr *);
2258                 sin6 = (struct sockaddr_in6 *)&local_store;
2259                 sin6->sin6_family = AF_INET6;
2260                 sin6->sin6_len = sizeof(*sin6);
2261                 sin6->sin6_port = sh->dest_port;
2262                 sin6->sin6_addr = ip6->ip6_dst;
2263                 break;
2264 #endif
2265         default:
2266                 return NULL;
2267         }
2268
2269         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2270             &parm_buf, sizeof(struct sctp_paramhdr));
2271         if (phdr == NULL) {
2272                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2273                     __FUNCTION__);
2274                 return NULL;
2275         }
2276         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2277         /* get the correlation address */
2278         switch (ptype) {
2279 #ifdef INET6
2280         case SCTP_IPV6_ADDRESS:
2281                 {
2282                         /* ipv6 address param */
2283                         struct sctp_ipv6addr_param *p6, p6_buf;
2284
2285                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2286                                 return NULL;
2287                         }
2288                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2289                             offset + sizeof(struct sctp_asconf_chunk),
2290                             &p6_buf.ph, sizeof(*p6));
2291                         if (p6 == NULL) {
2292                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2293                                     __FUNCTION__);
2294                                 return (NULL);
2295                         }
2296                         sin6 = (struct sockaddr_in6 *)&remote_store;
2297                         sin6->sin6_family = AF_INET6;
2298                         sin6->sin6_len = sizeof(*sin6);
2299                         sin6->sin6_port = sh->src_port;
2300                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2301                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2302                                 zero_address = 1;
2303                         break;
2304                 }
2305 #endif
2306         case SCTP_IPV4_ADDRESS:
2307                 {
2308                         /* ipv4 address param */
2309                         struct sctp_ipv4addr_param *p4, p4_buf;
2310
2311                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2312                                 return NULL;
2313                         }
2314                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2315                             offset + sizeof(struct sctp_asconf_chunk),
2316                             &p4_buf.ph, sizeof(*p4));
2317                         if (p4 == NULL) {
2318                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2319                                     __FUNCTION__);
2320                                 return (NULL);
2321                         }
2322                         sin = (struct sockaddr_in *)&remote_store;
2323                         sin->sin_family = AF_INET;
2324                         sin->sin_len = sizeof(*sin);
2325                         sin->sin_port = sh->src_port;
2326                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2327                         if (sin->sin_addr.s_addr == INADDR_ANY)
2328                                 zero_address = 1;
2329                         break;
2330                 }
2331         default:
2332                 /* invalid address param type */
2333                 return NULL;
2334         }
2335
2336         if (zero_address) {
2337                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2338                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2339                 /*
2340                  * printf("findassociation_ep_asconf: zero lookup address
2341                  * finds stcb 0x%x\n", (uint32_t)stcb);
2342                  */
2343         } else {
2344                 stcb = sctp_findassociation_ep_addr(inp_p,
2345                     (struct sockaddr *)&remote_store, netp,
2346                     to, NULL);
2347         }
2348         return (stcb);
2349 }
2350
2351
2352 /*
2353  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2354  * addresses. This way if we don't get a bind we by default pick a ephemeral
2355  * port with all addresses bound.
2356  */
2357 int
2358 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2359 {
2360         /*
2361          * we get called when a new endpoint starts up. We need to allocate
2362          * the sctp_inpcb structure from the zone and init it. Mark it as
2363          * unbound and find a port that we can use as an ephemeral with
2364          * INADDR_ANY. If the user binds later no problem we can then add in
2365          * the specific addresses. And setup the default parameters for the
2366          * EP.
2367          */
2368         int i, error;
2369         struct sctp_inpcb *inp;
2370         struct sctp_pcb *m;
2371         struct timeval time;
2372         sctp_sharedkey_t *null_key;
2373
2374         error = 0;
2375
2376         SCTP_INP_INFO_WLOCK();
2377         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2378         if (inp == NULL) {
2379                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2380                 SCTP_INP_INFO_WUNLOCK();
2381                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2382                 return (ENOBUFS);
2383         }
2384         /* zap it */
2385         bzero(inp, sizeof(*inp));
2386
2387         /* bump generations */
2388         /* setup socket pointers */
2389         inp->sctp_socket = so;
2390         inp->ip_inp.inp.inp_socket = so;
2391         inp->sctp_associd_counter = 1;
2392         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2393         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2394         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2395         /* init the small hash table we use to track asocid <-> tcb */
2396         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2397         if (inp->sctp_asocidhash == NULL) {
2398                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2399                 SCTP_INP_INFO_WUNLOCK();
2400                 return (ENOBUFS);
2401         }
2402 #ifdef IPSEC
2403         {
2404                 struct inpcbpolicy *pcb_sp = NULL;
2405
2406                 error = ipsec_init_policy(so, &pcb_sp);
2407                 /* Arrange to share the policy */
2408                 inp->ip_inp.inp.inp_sp = pcb_sp;
2409                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2410         }
2411         if (error != 0) {
2412                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2413                 SCTP_INP_INFO_WUNLOCK();
2414                 return error;
2415         }
2416 #endif                          /* IPSEC */
2417         SCTP_INCR_EP_COUNT();
2418         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2419         SCTP_INP_INFO_WUNLOCK();
2420
2421         so->so_pcb = (caddr_t)inp;
2422
2423         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2424             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2425                 /* UDP style socket */
2426                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2427                     SCTP_PCB_FLAGS_UNBOUND);
2428                 /* Be sure it is NON-BLOCKING IO for UDP */
2429                 /* SCTP_SET_SO_NBIO(so); */
2430         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2431                 /* TCP style socket */
2432                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2433                     SCTP_PCB_FLAGS_UNBOUND);
2434                 /* Be sure we have blocking IO by default */
2435                 SCTP_CLEAR_SO_NBIO(so);
2436         } else {
2437                 /*
2438                  * unsupported socket type (RAW, etc)- in case we missed it
2439                  * in protosw
2440                  */
2441                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2442                 so->so_pcb = NULL;
2443                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2444                 return (EOPNOTSUPP);
2445         }
2446         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2447                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2448                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2449         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2450                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2451                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2452         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2453                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2454                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2455         }
2456         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2457             &inp->sctp_hashmark);
2458         if (inp->sctp_tcbhash == NULL) {
2459                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2460                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2461                 so->so_pcb = NULL;
2462                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2463                 return (ENOBUFS);
2464         }
2465         inp->def_vrf_id = vrf_id;
2466
2467         SCTP_INP_INFO_WLOCK();
2468         SCTP_INP_LOCK_INIT(inp);
2469         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2470         SCTP_INP_READ_INIT(inp);
2471         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2472         /* lock the new ep */
2473         SCTP_INP_WLOCK(inp);
2474
2475         /* add it to the info area */
2476         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2477         SCTP_INP_INFO_WUNLOCK();
2478
2479         TAILQ_INIT(&inp->read_queue);
2480         LIST_INIT(&inp->sctp_addr_list);
2481
2482         LIST_INIT(&inp->sctp_asoc_list);
2483
2484 #ifdef SCTP_TRACK_FREED_ASOCS
2485         /* TEMP CODE */
2486         LIST_INIT(&inp->sctp_asoc_free_list);
2487 #endif
2488         /* Init the timer structure for signature change */
2489         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2490         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2491
2492         /* now init the actual endpoint default data */
2493         m = &inp->sctp_ep;
2494
2495         /* setup the base timeout information */
2496         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2497         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2498         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2499         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2500         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2501         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2502         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2503         /* all max/min max are in ms */
2504         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2505         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2506         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2507         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2508         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2509
2510         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2511
2512         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2513         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2514         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2515         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2516         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2517         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2518         if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
2519             (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
2520                 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2521         } else {
2522                 /* sysctl done with invalid value, set to 2581 */
2523                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2524         }
2525         /* number of streams to pre-open on a association */
2526         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2527
2528         /* Add adaptation cookie */
2529         m->adaptation_layer_indicator = 0x504C5253;
2530
2531         /* seed random number generator */
2532         m->random_counter = 1;
2533         m->store_at = SCTP_SIGNATURE_SIZE;
2534         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2535         sctp_fill_random_store(m);
2536
2537         /* Minimum cookie size */
2538         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2539             sizeof(struct sctp_state_cookie);
2540         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2541
2542         /* Setup the initial secret */
2543         (void)SCTP_GETTIME_TIMEVAL(&time);
2544         m->time_of_secret_change = time.tv_sec;
2545
2546         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2547                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2548         }
2549         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2550
2551         /* How long is a cookie good for ? */
2552         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2553         /*
2554          * Initialize authentication parameters
2555          */
2556         m->local_hmacs = sctp_default_supported_hmaclist();
2557         m->local_auth_chunks = sctp_alloc_chunklist();
2558         sctp_auth_set_default_chunks(m->local_auth_chunks);
2559         LIST_INIT(&m->shared_keys);
2560         /* add default NULL key as key id 0 */
2561         null_key = sctp_alloc_sharedkey();
2562         sctp_insert_sharedkey(&m->shared_keys, null_key);
2563         SCTP_INP_WUNLOCK(inp);
2564 #ifdef SCTP_LOG_CLOSING
2565         sctp_log_closing(inp, NULL, 12);
2566 #endif
2567         return (error);
2568 }
2569
2570
2571 void
2572 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2573     struct sctp_tcb *stcb)
2574 {
2575         struct sctp_nets *net;
2576         uint16_t lport, rport;
2577         struct sctppcbhead *head;
2578         struct sctp_laddr *laddr, *oladdr;
2579
2580         atomic_add_int(&stcb->asoc.refcnt, 1);
2581         SCTP_TCB_UNLOCK(stcb);
2582         SCTP_INP_INFO_WLOCK();
2583         SCTP_INP_WLOCK(old_inp);
2584         SCTP_INP_WLOCK(new_inp);
2585         SCTP_TCB_LOCK(stcb);
2586         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2587
2588         new_inp->sctp_ep.time_of_secret_change =
2589             old_inp->sctp_ep.time_of_secret_change;
2590         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2591             sizeof(old_inp->sctp_ep.secret_key));
2592         new_inp->sctp_ep.current_secret_number =
2593             old_inp->sctp_ep.current_secret_number;
2594         new_inp->sctp_ep.last_secret_number =
2595             old_inp->sctp_ep.last_secret_number;
2596         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2597
2598         /* make it so new data pours into the new socket */
2599         stcb->sctp_socket = new_inp->sctp_socket;
2600         stcb->sctp_ep = new_inp;
2601
2602         /* Copy the port across */
2603         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2604         rport = stcb->rport;
2605         /* Pull the tcb from the old association */
2606         LIST_REMOVE(stcb, sctp_tcbhash);
2607         LIST_REMOVE(stcb, sctp_tcblist);
2608         if (stcb->asoc.in_asocid_hash) {
2609                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2610         }
2611         /* Now insert the new_inp into the TCP connected hash */
2612         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2613
2614         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2615         /* Its safe to access */
2616         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2617
2618         /* Now move the tcb into the endpoint list */
2619         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2620         /*
2621          * Question, do we even need to worry about the ep-hash since we
2622          * only have one connection? Probably not :> so lets get rid of it
2623          * and not suck up any kernel memory in that.
2624          */
2625         if (stcb->asoc.in_asocid_hash) {
2626                 struct sctpasochead *lhd;
2627
2628                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2629                     new_inp->hashasocidmark)];
2630                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2631         }
2632         /* Ok. Let's restart timer. */
2633         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2634                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2635                     stcb, net);
2636         }
2637
2638         SCTP_INP_INFO_WUNLOCK();
2639         if (new_inp->sctp_tcbhash != NULL) {
2640                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2641                 new_inp->sctp_tcbhash = NULL;
2642         }
2643         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2644                 /* Subset bound, so copy in the laddr list from the old_inp */
2645                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2646                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2647                         if (laddr == NULL) {
2648                                 /*
2649                                  * Gak, what can we do? This assoc is really
2650                                  * HOSED. We probably should send an abort
2651                                  * here.
2652                                  */
2653                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2654                                 continue;
2655                         }
2656                         SCTP_INCR_LADDR_COUNT();
2657                         bzero(laddr, sizeof(*laddr));
2658                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2659                         laddr->ifa = oladdr->ifa;
2660                         atomic_add_int(&laddr->ifa->refcount, 1);
2661                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2662                             sctp_nxt_addr);
2663                         new_inp->laddr_count++;
2664                 }
2665         }
2666         /*
2667          * Now any running timers need to be adjusted since we really don't
2668          * care if they are running or not just blast in the new_inp into
2669          * all of them.
2670          */
2671
2672         stcb->asoc.hb_timer.ep = (void *)new_inp;
2673         stcb->asoc.dack_timer.ep = (void *)new_inp;
2674         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2675         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2676         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2677         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2678         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2679         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2680         /* now what about the nets? */
2681         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2682                 net->pmtu_timer.ep = (void *)new_inp;
2683                 net->rxt_timer.ep = (void *)new_inp;
2684                 net->fr_timer.ep = (void *)new_inp;
2685         }
2686         SCTP_INP_WUNLOCK(new_inp);
2687         SCTP_INP_WUNLOCK(old_inp);
2688 }
2689
2690
2691
2692
2693 /* sctp_ifap is used to bypass normal local address validation checks */
2694 int
2695 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2696     struct sctp_ifa *sctp_ifap, struct thread *p)
2697 {
2698         /* bind a ep to a socket address */
2699         struct sctppcbhead *head;
2700         struct sctp_inpcb *inp, *inp_tmp;
2701         struct inpcb *ip_inp;
2702         int port_reuse_active = 0;
2703         int bindall;
2704         uint16_t lport;
2705         int error;
2706         uint32_t vrf_id;
2707
2708         lport = 0;
2709         error = 0;
2710         bindall = 1;
2711         inp = (struct sctp_inpcb *)so->so_pcb;
2712         ip_inp = (struct inpcb *)so->so_pcb;
2713 #ifdef SCTP_DEBUG
2714         if (addr) {
2715                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2716                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2717                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2718                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2719         }
2720 #endif
2721         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2722                 /* already did a bind, subsequent binds NOT allowed ! */
2723                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2724                 return (EINVAL);
2725         }
2726 #ifdef INVARIANTS
2727         if (p == NULL)
2728                 panic("null proc/thread");
2729 #endif
2730         if (addr != NULL) {
2731                 switch (addr->sa_family) {
2732                 case AF_INET:
2733                         {
2734                                 struct sockaddr_in *sin;
2735
2736                                 /* IPV6_V6ONLY socket? */
2737                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2738                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2739                                         return (EINVAL);
2740                                 }
2741                                 if (addr->sa_len != sizeof(*sin)) {
2742                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2743                                         return (EINVAL);
2744                                 }
2745                                 sin = (struct sockaddr_in *)addr;
2746                                 lport = sin->sin_port;
2747                                 /*
2748                                  * For LOOPBACK the prison_local_ip4() call
2749                                  * will transmute the ip address to the
2750                                  * proper value.
2751                                  */
2752                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2753                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2754                                         return (error);
2755                                 }
2756                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2757                                         bindall = 0;
2758                                 }
2759                                 break;
2760                         }
2761 #ifdef INET6
2762                 case AF_INET6:
2763                         {
2764                                 /*
2765                                  * Only for pure IPv6 Address. (No IPv4
2766                                  * Mapped!)
2767                                  */
2768                                 struct sockaddr_in6 *sin6;
2769
2770                                 sin6 = (struct sockaddr_in6 *)addr;
2771
2772                                 if (addr->sa_len != sizeof(*sin6)) {
2773                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2774                                         return (EINVAL);
2775                                 }
2776                                 lport = sin6->sin6_port;
2777
2778                                 /*
2779                                  * For LOOPBACK the prison_local_ip6() call
2780                                  * will transmute the ipv6 address to the
2781                                  * proper value.
2782                                  */
2783                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2784                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2785                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2786                                         return (error);
2787                                 }
2788                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2789                                         bindall = 0;
2790                                         /* KAME hack: embed scopeid */
2791                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2792                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2793                                                 return (EINVAL);
2794                                         }
2795                                 }
2796                                 /* this must be cleared for ifa_ifwithaddr() */
2797                                 sin6->sin6_scope_id = 0;
2798                                 break;
2799                         }
2800 #endif
2801                 default:
2802                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2803                         return (EAFNOSUPPORT);
2804                 }
2805         }
2806         SCTP_INP_INFO_WLOCK();
2807         SCTP_INP_WLOCK(inp);
2808         /* Setup a vrf_id to be the default for the non-bind-all case. */
2809         vrf_id = inp->def_vrf_id;
2810
2811         /* increase our count due to the unlock we do */
2812         SCTP_INP_INCR_REF(inp);
2813         if (lport) {
2814                 /*
2815                  * Did the caller specify a port? if so we must see if a ep
2816                  * already has this one bound.
2817                  */
2818                 /* got to be root to get at low ports */
2819                 if (ntohs(lport) < IPPORT_RESERVED) {
2820                         if (p && (error =
2821                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2822                             )) {
2823                                 SCTP_INP_DECR_REF(inp);
2824                                 SCTP_INP_WUNLOCK(inp);
2825                                 SCTP_INP_INFO_WUNLOCK();
2826                                 return (error);
2827                         }
2828                 }
2829                 if (p == NULL) {
2830                         SCTP_INP_DECR_REF(inp);
2831                         SCTP_INP_WUNLOCK(inp);
2832                         SCTP_INP_INFO_WUNLOCK();
2833                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2834                         return (error);
2835                 }
2836                 SCTP_INP_WUNLOCK(inp);
2837                 if (bindall) {
2838                         vrf_id = inp->def_vrf_id;
2839                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2840                         if (inp_tmp != NULL) {
2841                                 /*
2842                                  * lock guy returned and lower count note
2843                                  * that we are not bound so inp_tmp should
2844                                  * NEVER be inp. And it is this inp
2845                                  * (inp_tmp) that gets the reference bump,
2846                                  * so we must lower it.
2847                                  */
2848                                 SCTP_INP_DECR_REF(inp_tmp);
2849                                 /* unlock info */
2850                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2851                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2852                                         /*
2853                                          * Ok, must be one-2-one and
2854                                          * allowing port re-use
2855                                          */
2856                                         port_reuse_active = 1;
2857                                         goto continue_anyway;
2858                                 }
2859                                 SCTP_INP_DECR_REF(inp);
2860                                 SCTP_INP_INFO_WUNLOCK();
2861                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2862                                 return (EADDRINUSE);
2863                         }
2864                 } else {
2865                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2866                         if (inp_tmp != NULL) {
2867                                 /*
2868                                  * lock guy returned and lower count note
2869                                  * that we are not bound so inp_tmp should
2870                                  * NEVER be inp. And it is this inp
2871                                  * (inp_tmp) that gets the reference bump,
2872                                  * so we must lower it.
2873                                  */
2874                                 SCTP_INP_DECR_REF(inp_tmp);
2875                                 /* unlock info */
2876                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2877                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2878                                         /*
2879                                          * Ok, must be one-2-one and
2880                                          * allowing port re-use
2881                                          */
2882                                         port_reuse_active = 1;
2883                                         goto continue_anyway;
2884                                 }
2885                                 SCTP_INP_DECR_REF(inp);
2886                                 SCTP_INP_INFO_WUNLOCK();
2887                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2888                                 return (EADDRINUSE);
2889                         }
2890                 }
2891 continue_anyway:
2892                 SCTP_INP_WLOCK(inp);
2893                 if (bindall) {
2894                         /* verify that no lport is not used by a singleton */
2895                         if ((port_reuse_active == 0) &&
2896                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2897                             ) {
2898                                 /* Sorry someone already has this one bound */
2899                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2900                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2901                                         port_reuse_active = 1;
2902                                 } else {
2903                                         SCTP_INP_DECR_REF(inp);
2904                                         SCTP_INP_WUNLOCK(inp);
2905                                         SCTP_INP_INFO_WUNLOCK();
2906                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2907                                         return (EADDRINUSE);
2908                                 }
2909                         }
2910                 }
2911         } else {
2912                 uint16_t first, last, candidate;
2913                 uint16_t count;
2914                 int done;
2915
2916                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2917                         first = MODULE_GLOBAL(ipport_hifirstauto);
2918                         last = MODULE_GLOBAL(ipport_hilastauto);
2919                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2920                         if (p && (error =
2921                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2922                             )) {
2923                                 SCTP_INP_DECR_REF(inp);
2924                                 SCTP_INP_WUNLOCK(inp);
2925                                 SCTP_INP_INFO_WUNLOCK();
2926                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2927                                 return (error);
2928                         }
2929                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2930                         last = MODULE_GLOBAL(ipport_lowlastauto);
2931                 } else {
2932                         first = MODULE_GLOBAL(ipport_firstauto);
2933                         last = MODULE_GLOBAL(ipport_lastauto);
2934                 }
2935                 if (first > last) {
2936                         uint16_t temp;
2937
2938                         temp = first;
2939                         first = last;
2940                         last = temp;
2941                 }
2942                 count = last - first + 1;       /* number of candidates */
2943                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2944
2945                 done = 0;
2946                 while (!done) {
2947                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2948                                 done = 1;
2949                         }
2950                         if (!done) {
2951                                 if (--count == 0) {
2952                                         SCTP_INP_DECR_REF(inp);
2953                                         SCTP_INP_WUNLOCK(inp);
2954                                         SCTP_INP_INFO_WUNLOCK();
2955                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2956                                         return (EADDRINUSE);
2957                                 }
2958                                 if (candidate == last)
2959                                         candidate = first;
2960                                 else
2961                                         candidate = candidate + 1;
2962                         }
2963                 }
2964                 lport = htons(candidate);
2965         }
2966         SCTP_INP_DECR_REF(inp);
2967         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2968             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2969                 /*
2970                  * this really should not happen. The guy did a non-blocking
2971                  * bind and then did a close at the same time.
2972                  */
2973                 SCTP_INP_WUNLOCK(inp);
2974                 SCTP_INP_INFO_WUNLOCK();
2975                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2976                 return (EINVAL);
2977         }
2978         /* ok we look clear to give out this port, so lets setup the binding */
2979         if (bindall) {
2980                 /* binding to all addresses, so just set in the proper flags */
2981                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2982                 /* set the automatic addr changes from kernel flag */
2983                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2984                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2985                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2986                 } else {
2987                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2988                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2989                 }
2990                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2991                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2992                 } else {
2993                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2994                 }
2995                 /*
2996                  * set the automatic mobility_base from kernel flag (by
2997                  * micchie)
2998                  */
2999                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3000                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3001                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3002                 } else {
3003                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3004                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3005                 }
3006                 /*
3007                  * set the automatic mobility_fasthandoff from kernel flag
3008                  * (by micchie)
3009                  */
3010                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3011                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3012                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3013                 } else {
3014                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3015                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3016                 }
3017         } else {
3018                 /*
3019                  * bind specific, make sure flags is off and add a new
3020                  * address structure to the sctp_addr_list inside the ep
3021                  * structure.
3022                  *
3023                  * We will need to allocate one and insert it at the head. The
3024                  * socketopt call can just insert new addresses in there as
3025                  * well. It will also have to do the embed scope kame hack
3026                  * too (before adding).
3027                  */
3028                 struct sctp_ifa *ifa;
3029                 struct sockaddr_storage store_sa;
3030
3031                 memset(&store_sa, 0, sizeof(store_sa));
3032                 if (addr->sa_family == AF_INET) {
3033                         struct sockaddr_in *sin;
3034
3035                         sin = (struct sockaddr_in *)&store_sa;
3036                         memcpy(sin, addr, sizeof(struct sockaddr_in));
3037                         sin->sin_port = 0;
3038                 } else if (addr->sa_family == AF_INET6) {
3039                         struct sockaddr_in6 *sin6;
3040
3041                         sin6 = (struct sockaddr_in6 *)&store_sa;
3042                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3043                         sin6->sin6_port = 0;
3044                 }
3045                 /*
3046                  * first find the interface with the bound address need to
3047                  * zero out the port to find the address! yuck! can't do
3048                  * this earlier since need port for sctp_pcb_findep()
3049                  */
3050                 if (sctp_ifap != NULL)
3051                         ifa = sctp_ifap;
3052                 else {
3053                         /*
3054                          * Note for BSD we hit here always other O/S's will
3055                          * pass things in via the sctp_ifap argument
3056                          * (Panda).
3057                          */
3058                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3059                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3060                 }
3061                 if (ifa == NULL) {
3062                         /* Can't find an interface with that address */
3063                         SCTP_INP_WUNLOCK(inp);
3064                         SCTP_INP_INFO_WUNLOCK();
3065                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3066                         return (EADDRNOTAVAIL);
3067                 }
3068                 if (addr->sa_family == AF_INET6) {
3069                         /* GAK, more FIXME IFA lock? */
3070                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3071                                 /* Can't bind a non-existent addr. */
3072                                 SCTP_INP_WUNLOCK(inp);
3073                                 SCTP_INP_INFO_WUNLOCK();
3074                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3075                                 return (EINVAL);
3076                         }
3077                 }
3078                 /* we're not bound all */
3079                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3080                 /* allow bindx() to send ASCONF's for binding changes */
3081                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3082                 /* clear automatic addr changes from kernel flag */
3083                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3084
3085                 /* add this address to the endpoint list */
3086                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3087                 if (error != 0) {
3088                         SCTP_INP_WUNLOCK(inp);
3089                         SCTP_INP_INFO_WUNLOCK();
3090                         return (error);
3091                 }
3092                 inp->laddr_count++;
3093         }
3094         /* find the bucket */
3095         if (port_reuse_active) {
3096                 /* Put it into tcp 1-2-1 hash */
3097                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3098                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3099         } else {
3100                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3101         }
3102         /* put it in the bucket */
3103         LIST_INSERT_HEAD(head, inp, sctp_hash);
3104         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3105             head, ntohs(lport), port_reuse_active);
3106         /* set in the port */
3107         inp->sctp_lport = lport;
3108
3109         /* turn off just the unbound flag */
3110         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3111         SCTP_INP_WUNLOCK(inp);
3112         SCTP_INP_INFO_WUNLOCK();
3113         return (0);
3114 }
3115
3116
3117 static void
3118 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3119 {
3120         struct sctp_iterator *it, *nit;
3121
3122         /*
3123          * We enter with the only the ITERATOR_LOCK in place and a write
3124          * lock on the inp_info stuff.
3125          */
3126         it = sctp_it_ctl.cur_it;
3127         if (it && (it->vn != curvnet)) {
3128                 /* Its not looking at our VNET */
3129                 return;
3130         }
3131         if (it && (it->inp == inp)) {
3132                 /*
3133                  * This is tricky and we hold the iterator lock, but when it
3134                  * returns and gets the lock (when we release it) the
3135                  * iterator will try to operate on inp. We need to stop that
3136                  * from happening. But of course the iterator has a
3137                  * reference on the stcb and inp. We can mark it and it will
3138                  * stop.
3139                  *
3140                  * If its a single iterator situation, we set the end iterator
3141                  * flag. Otherwise we set the iterator to go to the next
3142                  * inp.
3143                  *
3144                  */
3145                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3146                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3147                 } else {
3148                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3149                 }
3150         }
3151         /*
3152          * Now go through and remove any single reference to our inp that
3153          * may be still pending on the list
3154          */
3155         SCTP_IPI_ITERATOR_WQ_LOCK();
3156         it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
3157         while (it) {
3158                 nit = TAILQ_NEXT(it, sctp_nxt_itr);
3159                 if (it->vn != curvnet) {
3160                         it = nit;
3161                         continue;
3162                 }
3163                 if (it->inp == inp) {
3164                         /* This one points to me is it inp specific? */
3165                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3166                                 /* Remove and free this one */
3167                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3168                                     it, sctp_nxt_itr);
3169                                 if (it->function_atend != NULL) {
3170                                         (*it->function_atend) (it->pointer, it->val);
3171                                 }
3172                                 SCTP_FREE(it, SCTP_M_ITER);
3173                         } else {
3174                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3175                                 if (it->inp) {
3176                                         SCTP_INP_INCR_REF(it->inp);
3177                                 }
3178                         }
3179                         /*
3180                          * When its put in the refcnt is incremented so decr
3181                          * it
3182                          */
3183                         SCTP_INP_DECR_REF(inp);
3184                 }
3185                 it = nit;
3186         }
3187         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3188 }
3189
3190 /* release sctp_inpcb unbind the port */
3191 void
3192 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3193 {
3194         /*
3195          * Here we free a endpoint. We must find it (if it is in the Hash
3196          * table) and remove it from there. Then we must also find it in the
3197          * overall list and remove it from there. After all removals are
3198          * complete then any timer has to be stopped. Then start the actual
3199          * freeing. a) Any local lists. b) Any associations. c) The hash of
3200          * all associations. d) finally the ep itself.
3201          */
3202         struct sctp_pcb *m;
3203         struct sctp_tcb *asoc, *nasoc;
3204         struct sctp_laddr *laddr, *nladdr;
3205         struct inpcb *ip_pcb;
3206         struct socket *so;
3207         int being_refed = 0;
3208         struct sctp_queued_to_read *sq;
3209
3210
3211         int cnt;
3212         sctp_sharedkey_t *shared_key;
3213
3214
3215 #ifdef SCTP_LOG_CLOSING
3216         sctp_log_closing(inp, NULL, 0);
3217 #endif
3218         SCTP_ITERATOR_LOCK();
3219         /* mark any iterators on the list or being processed */
3220         sctp_iterator_inp_being_freed(inp);
3221         SCTP_ITERATOR_UNLOCK();
3222         so = inp->sctp_socket;
3223         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3224                 /* been here before.. eeks.. get out of here */
3225                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3226 #ifdef SCTP_LOG_CLOSING
3227                 sctp_log_closing(inp, NULL, 1);
3228 #endif
3229                 return;
3230         }
3231         SCTP_ASOC_CREATE_LOCK(inp);
3232         SCTP_INP_INFO_WLOCK();
3233
3234         SCTP_INP_WLOCK(inp);
3235         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3236                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3237                 /* socket is gone, so no more wakeups allowed */
3238                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3239                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3240                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3241
3242         }
3243         /* First time through we have the socket lock, after that no more. */
3244         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3245             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3246
3247         if (inp->control) {
3248                 sctp_m_freem(inp->control);
3249                 inp->control = NULL;
3250         }
3251         if (inp->pkt) {
3252                 sctp_m_freem(inp->pkt);
3253                 inp->pkt = NULL;
3254         }
3255         m = &inp->sctp_ep;
3256         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3257                                          * here but I will be nice :> (i.e.
3258                                          * ip_pcb = ep;) */
3259         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3260                 int cnt_in_sd;
3261
3262                 cnt_in_sd = 0;
3263                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3264                     asoc = nasoc) {
3265                         SCTP_TCB_LOCK(asoc);
3266                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
3267                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3268                                 /* Skip guys being freed */
3269                                 cnt_in_sd++;
3270                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3271                                         /*
3272                                          * Special case - we did not start a
3273                                          * kill timer on the asoc due to it
3274                                          * was not closed. So go ahead and
3275                                          * start it now.
3276                                          */
3277                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3278                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3279                                 }
3280                                 SCTP_TCB_UNLOCK(asoc);
3281                                 continue;
3282                         }
3283                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3284                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3285                             (asoc->asoc.total_output_queue_size == 0)) {
3286                                 /*
3287                                  * If we have data in queue, we don't want
3288                                  * to just free since the app may have done,
3289                                  * send()/close or connect/send/close. And
3290                                  * it wants the data to get across first.
3291                                  */
3292                                 /* Just abandon things in the front states */
3293                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3294                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3295                                         cnt_in_sd++;
3296                                 }
3297                                 continue;
3298                         }
3299                         /* Disconnect the socket please */
3300                         asoc->sctp_socket = NULL;
3301                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3302                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3303                             (asoc->asoc.control_pdapi) ||
3304                             (asoc->asoc.size_on_all_streams > 0) ||
3305                             (so && (so->so_rcv.sb_cc > 0))
3306                             ) {
3307                                 /* Left with Data unread */
3308                                 struct mbuf *op_err;
3309
3310                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3311                                     0, M_DONTWAIT, 1, MT_DATA);
3312                                 if (op_err) {
3313                                         /* Fill in the user initiated abort */
3314                                         struct sctp_paramhdr *ph;
3315                                         uint32_t *ippp;
3316
3317                                         SCTP_BUF_LEN(op_err) =
3318                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3319                                         ph = mtod(op_err,
3320                                             struct sctp_paramhdr *);
3321                                         ph->param_type = htons(
3322                                             SCTP_CAUSE_USER_INITIATED_ABT);
3323                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3324                                         ippp = (uint32_t *) (ph + 1);
3325                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3326                                 }
3327                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3328 #if defined(SCTP_PANIC_ON_ABORT)
3329                                 panic("inpcb_free does an abort");
3330 #endif
3331                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3332                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3333                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3334                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3335                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3336                                 }
3337                                 if (sctp_free_assoc(inp, asoc,
3338                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3339                                         cnt_in_sd++;
3340                                 }
3341                                 continue;
3342                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3343                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3344                                     (asoc->asoc.stream_queue_cnt == 0)
3345                             ) {
3346                                 if (asoc->asoc.locked_on_sending) {
3347                                         goto abort_anyway;
3348                                 }
3349                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3350                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3351                                         /*
3352                                          * there is nothing queued to send,
3353                                          * so I send shutdown
3354                                          */
3355                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3356                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3357                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3358                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3359                                         }
3360                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3361                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3362                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3363                                             asoc->asoc.primary_destination);
3364                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3365                                             asoc->asoc.primary_destination);
3366                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3367                                 }
3368                         } else {
3369                                 /* mark into shutdown pending */
3370                                 struct sctp_stream_queue_pending *sp;
3371
3372                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3373                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3374                                     asoc->asoc.primary_destination);
3375                                 if (asoc->asoc.locked_on_sending) {
3376                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3377                                             sctp_streamhead);
3378                                         if (sp == NULL) {
3379                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3380                                                     asoc->asoc.locked_on_sending,
3381                                                     asoc->asoc.locked_on_sending->stream_no);
3382                                         } else {
3383                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3384                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3385                                         }
3386                                 }
3387                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3388                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3389                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3390                                         struct mbuf *op_err;
3391
3392                         abort_anyway:
3393                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3394                                             0, M_DONTWAIT, 1, MT_DATA);
3395                                         if (op_err) {
3396                                                 /*
3397                                                  * Fill in the user
3398                                                  * initiated abort
3399                                                  */
3400                                                 struct sctp_paramhdr *ph;
3401                                                 uint32_t *ippp;
3402
3403                                                 SCTP_BUF_LEN(op_err) =
3404                                                     (sizeof(struct sctp_paramhdr) +
3405                                                     sizeof(uint32_t));
3406                                                 ph = mtod(op_err,
3407                                                     struct sctp_paramhdr *);
3408                                                 ph->param_type = htons(
3409                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3410                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3411                                                 ippp = (uint32_t *) (ph + 1);
3412                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3413                                         }
3414                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3415 #if defined(SCTP_PANIC_ON_ABORT)
3416                                         panic("inpcb_free does an abort");
3417 #endif
3418
3419                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3420                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3421                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3422                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3423                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3424                                         }
3425                                         if (sctp_free_assoc(inp, asoc,
3426                                             SCTP_PCBFREE_NOFORCE,
3427                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3428                                                 cnt_in_sd++;
3429                                         }
3430                                         continue;
3431                                 } else {
3432                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3433                                 }
3434                         }
3435                         cnt_in_sd++;
3436                         SCTP_TCB_UNLOCK(asoc);
3437                 }
3438                 /* now is there some left in our SHUTDOWN state? */
3439                 if (cnt_in_sd) {
3440 #ifdef SCTP_LOG_CLOSING
3441                         sctp_log_closing(inp, NULL, 2);
3442 #endif
3443                         inp->sctp_socket = NULL;
3444                         SCTP_INP_WUNLOCK(inp);
3445                         SCTP_ASOC_CREATE_UNLOCK(inp);
3446                         SCTP_INP_INFO_WUNLOCK();
3447                         return;
3448                 }
3449         }
3450         inp->sctp_socket = NULL;
3451         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3452             SCTP_PCB_FLAGS_UNBOUND) {
3453                 /*
3454                  * ok, this guy has been bound. It's port is somewhere in
3455                  * the SCTP_BASE_INFO(hash table). Remove it!
3456                  */
3457                 LIST_REMOVE(inp, sctp_hash);
3458                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3459         }
3460         /*
3461          * If there is a timer running to kill us, forget it, since it may
3462          * have a contest on the INP lock.. which would cause us to die ...
3463          */
3464         cnt = 0;
3465         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3466             asoc = nasoc) {
3467                 SCTP_TCB_LOCK(asoc);
3468                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3469                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3470                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3471                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3472                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3473                         }
3474                         cnt++;
3475                         SCTP_TCB_UNLOCK(asoc);
3476                         continue;
3477                 }
3478                 /* Free associations that are NOT killing us */
3479                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3480                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3481                         struct mbuf *op_err;
3482                         uint32_t *ippp;
3483
3484                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3485                             0, M_DONTWAIT, 1, MT_DATA);
3486                         if (op_err) {
3487                                 /* Fill in the user initiated abort */
3488                                 struct sctp_paramhdr *ph;
3489
3490                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3491                                     sizeof(uint32_t));
3492                                 ph = mtod(op_err, struct sctp_paramhdr *);
3493                                 ph->param_type = htons(
3494                                     SCTP_CAUSE_USER_INITIATED_ABT);
3495                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3496                                 ippp = (uint32_t *) (ph + 1);
3497                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3498
3499                         }
3500                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3501 #if defined(SCTP_PANIC_ON_ABORT)
3502                         panic("inpcb_free does an abort");
3503 #endif
3504                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3505                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3506                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3507                         cnt++;
3508                         SCTP_TCB_UNLOCK(asoc);
3509                         continue;
3510                 }
3511                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3512                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3513                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3514                 }
3515                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3516                         cnt++;
3517                 }
3518         }
3519         if (cnt) {
3520                 /* Ok we have someone out there that will kill us */
3521                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3522 #ifdef SCTP_LOG_CLOSING
3523                 sctp_log_closing(inp, NULL, 3);
3524 #endif
3525                 SCTP_INP_WUNLOCK(inp);
3526                 SCTP_ASOC_CREATE_UNLOCK(inp);
3527                 SCTP_INP_INFO_WUNLOCK();
3528                 return;
3529         }
3530         if (SCTP_INP_LOCK_CONTENDED(inp))
3531                 being_refed++;
3532         if (SCTP_INP_READ_CONTENDED(inp))
3533                 being_refed++;
3534         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3535                 being_refed++;
3536
3537         if ((inp->refcount) ||
3538             (being_refed) ||
3539             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3540                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3541 #ifdef SCTP_LOG_CLOSING
3542                 sctp_log_closing(inp, NULL, 4);
3543 #endif
3544                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3545                 SCTP_INP_WUNLOCK(inp);
3546                 SCTP_ASOC_CREATE_UNLOCK(inp);
3547                 SCTP_INP_INFO_WUNLOCK();
3548                 return;
3549         }
3550         inp->sctp_ep.signature_change.type = 0;
3551         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3552         /*
3553          * Remove it from the list .. last thing we need a lock for.
3554          */
3555         LIST_REMOVE(inp, sctp_list);
3556         SCTP_INP_WUNLOCK(inp);
3557         SCTP_ASOC_CREATE_UNLOCK(inp);
3558         SCTP_INP_INFO_WUNLOCK();
3559         /*
3560          * Now we release all locks. Since this INP cannot be found anymore
3561          * except possibly by the kill timer that might be running. We call
3562          * the drain function here. It should hit the case were it sees the
3563          * ACTIVE flag cleared and exit out freeing us to proceed and
3564          * destroy everything.
3565          */
3566         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3567                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3568         } else {
3569                 /* Probably un-needed */
3570                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3571         }
3572
3573 #ifdef SCTP_LOG_CLOSING
3574         sctp_log_closing(inp, NULL, 5);
3575 #endif
3576
3577
3578         if ((inp->sctp_asocidhash) != NULL) {
3579                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3580                 inp->sctp_asocidhash = NULL;
3581         }
3582         /* sa_ignore FREED_MEMORY */
3583         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3584                 /* Its only abandoned if it had data left */
3585                 if (sq->length)
3586                         SCTP_STAT_INCR(sctps_left_abandon);
3587
3588                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3589                 sctp_free_remote_addr(sq->whoFrom);
3590                 if (so)
3591                         so->so_rcv.sb_cc -= sq->length;
3592                 if (sq->data) {
3593                         sctp_m_freem(sq->data);
3594                         sq->data = NULL;
3595                 }
3596                 /*
3597                  * no need to free the net count, since at this point all
3598                  * assoc's are gone.
3599                  */
3600                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3601                 SCTP_DECR_READQ_COUNT();
3602         }
3603         /* Now the sctp_pcb things */
3604         /*
3605          * free each asoc if it is not already closed/free. we can't use the
3606          * macro here since le_next will get freed as part of the
3607          * sctp_free_assoc() call.
3608          */
3609         cnt = 0;
3610         if (so) {
3611 #ifdef IPSEC
3612                 ipsec_delete_pcbpolicy(ip_pcb);
3613 #endif                          /* IPSEC */
3614
3615                 /* Unlocks not needed since the socket is gone now */
3616         }
3617         if (ip_pcb->inp_options) {
3618                 (void)sctp_m_free(ip_pcb->inp_options);
3619                 ip_pcb->inp_options = 0;
3620         }
3621         if (ip_pcb->inp_moptions) {
3622                 inp_freemoptions(ip_pcb->inp_moptions);
3623                 ip_pcb->inp_moptions = 0;
3624         }
3625 #ifdef INET6
3626         if (ip_pcb->inp_vflag & INP_IPV6) {
3627                 struct in6pcb *in6p;
3628
3629                 in6p = (struct in6pcb *)inp;
3630                 ip6_freepcbopts(in6p->in6p_outputopts);
3631         }
3632 #endif                          /* INET6 */
3633         ip_pcb->inp_vflag = 0;
3634         /* free up authentication fields */
3635         if (inp->sctp_ep.local_auth_chunks != NULL)
3636                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3637         if (inp->sctp_ep.local_hmacs != NULL)
3638                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3639
3640         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3641         while (shared_key) {
3642                 LIST_REMOVE(shared_key, next);
3643                 sctp_free_sharedkey(shared_key);
3644                 /* sa_ignore FREED_MEMORY */
3645                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3646         }
3647
3648         /*
3649          * if we have an address list the following will free the list of
3650          * ifaddr's that are set into this ep. Again macro limitations here,
3651          * since the LIST_FOREACH could be a bad idea.
3652          */
3653         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3654             laddr = nladdr) {
3655                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3656                 sctp_remove_laddr(laddr);
3657         }
3658
3659 #ifdef SCTP_TRACK_FREED_ASOCS
3660         /* TEMP CODE */
3661         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3662             asoc = nasoc) {
3663                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3664                 LIST_REMOVE(asoc, sctp_tcblist);
3665                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3666                 SCTP_DECR_ASOC_COUNT();
3667         }
3668         /* *** END TEMP CODE *** */
3669 #endif
3670         /* Now lets see about freeing the EP hash table. */
3671         if (inp->sctp_tcbhash != NULL) {
3672                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3673                 inp->sctp_tcbhash = NULL;
3674         }
3675         /* Now we must put the ep memory back into the zone pool */
3676         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3677         SCTP_INP_LOCK_DESTROY(inp);
3678         SCTP_INP_READ_DESTROY(inp);
3679         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3680         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3681         SCTP_DECR_EP_COUNT();
3682 }
3683
3684
3685 struct sctp_nets *
3686 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3687 {
3688         struct sctp_nets *net;
3689
3690         /* locate the address */
3691         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3692                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3693                         return (net);
3694         }
3695         return (NULL);
3696 }
3697
3698
3699 int
3700 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3701 {
3702         struct sctp_ifa *sctp_ifa;
3703
3704         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3705         if (sctp_ifa) {
3706                 return (1);
3707         } else {
3708                 return (0);
3709         }
3710 }
3711
3712 /*
3713  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3714  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3715  * stats of stuff.
3716  */
3717 int
3718 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3719     int set_scope, int from)
3720 {
3721         /*
3722          * The following is redundant to the same lines in the
3723          * sctp_aloc_assoc() but is needed since others call the add address
3724          * function
3725          */
3726         struct sctp_nets *net, *netfirst;
3727         int addr_inscope;
3728
3729         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3730             from);
3731         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3732
3733         netfirst = sctp_findnet(stcb, newaddr);
3734         if (netfirst) {
3735                 /*
3736                  * Lie and return ok, we don't want to make the association
3737                  * go away for this behavior. It will happen in the TCP
3738                  * model in a connected socket. It does not reach the hash
3739                  * table until after the association is built so it can't be
3740                  * found. Mark as reachable, since the initial creation will
3741                  * have been cleared and the NOT_IN_ASSOC flag will have
3742                  * been added... and we don't want to end up removing it
3743                  * back out.
3744                  */
3745                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3746                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3747                             SCTP_ADDR_UNCONFIRMED);
3748                 } else {
3749                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3750                 }
3751
3752                 return (0);
3753         }
3754         addr_inscope = 1;
3755         if (newaddr->sa_family == AF_INET) {
3756                 struct sockaddr_in *sin;
3757
3758                 sin = (struct sockaddr_in *)newaddr;
3759                 if (sin->sin_addr.s_addr == 0) {
3760                         /* Invalid address */
3761                         return (-1);
3762                 }
3763                 /* zero out the bzero area */
3764                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3765
3766                 /* assure len is set */
3767                 sin->sin_len = sizeof(struct sockaddr_in);
3768                 if (set_scope) {
3769 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3770                         stcb->ipv4_local_scope = 1;
3771 #else
3772                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3773                                 stcb->asoc.ipv4_local_scope = 1;
3774                         }
3775 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3776                 } else {
3777                         /* Validate the address is in scope */
3778                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3779                             (stcb->asoc.ipv4_local_scope == 0)) {
3780                                 addr_inscope = 0;
3781                         }
3782                 }
3783 #ifdef INET6
3784         } else if (newaddr->sa_family == AF_INET6) {
3785                 struct sockaddr_in6 *sin6;
3786
3787                 sin6 = (struct sockaddr_in6 *)newaddr;
3788                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3789                         /* Invalid address */
3790                         return (-1);
3791                 }
3792                 /* assure len is set */
3793                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3794                 if (set_scope) {
3795                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3796                                 stcb->asoc.loopback_scope = 1;
3797                                 stcb->asoc.local_scope = 0;
3798                                 stcb->asoc.ipv4_local_scope = 1;
3799                                 stcb->asoc.site_scope = 1;
3800                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3801                                 /*
3802                                  * If the new destination is a LINK_LOCAL we
3803                                  * must have common site scope. Don't set
3804                                  * the local scope since we may not share
3805                                  * all links, only loopback can do this.
3806                                  * Links on the local network would also be
3807                                  * on our private network for v4 too.
3808                                  */
3809                                 stcb->asoc.ipv4_local_scope = 1;
3810                                 stcb->asoc.site_scope = 1;
3811                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3812                                 /*
3813                                  * If the new destination is SITE_LOCAL then
3814                                  * we must have site scope in common.
3815                                  */
3816                                 stcb->asoc.site_scope = 1;
3817                         }
3818                 } else {
3819                         /* Validate the address is in scope */
3820                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3821                             (stcb->asoc.loopback_scope == 0)) {
3822                                 addr_inscope = 0;
3823                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3824                             (stcb->asoc.local_scope == 0)) {
3825                                 addr_inscope = 0;
3826                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3827                             (stcb->asoc.site_scope == 0)) {
3828                                 addr_inscope = 0;
3829                         }
3830                 }
3831 #endif
3832         } else {
3833                 /* not supported family type */
3834                 return (-1);
3835         }
3836         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3837         if (net == NULL) {
3838                 return (-1);
3839         }
3840         SCTP_INCR_RADDR_COUNT();
3841         bzero(net, sizeof(*net));
3842         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3843         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3844         if (newaddr->sa_family == AF_INET) {
3845                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3846         } else if (newaddr->sa_family == AF_INET6) {
3847                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3848         }
3849         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3850         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3851                 stcb->asoc.loopback_scope = 1;
3852                 stcb->asoc.ipv4_local_scope = 1;
3853                 stcb->asoc.local_scope = 0;
3854                 stcb->asoc.site_scope = 1;
3855                 addr_inscope = 1;
3856         }
3857         net->failure_threshold = stcb->asoc.def_net_failure;
3858         if (addr_inscope == 0) {
3859                 net->dest_state = (SCTP_ADDR_REACHABLE |
3860                     SCTP_ADDR_OUT_OF_SCOPE);
3861         } else {
3862                 if (from == SCTP_ADDR_IS_CONFIRMED)
3863                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3864                         net->dest_state = SCTP_ADDR_REACHABLE;
3865                 else
3866                         net->dest_state = SCTP_ADDR_REACHABLE |
3867                             SCTP_ADDR_UNCONFIRMED;
3868         }
3869         /*
3870          * We set this to 0, the timer code knows that this means its an
3871          * initial value
3872          */
3873         net->RTO = 0;
3874         net->RTO_measured = 0;
3875         stcb->asoc.numnets++;
3876         *(&net->ref_count) = 1;
3877         net->tos_flowlabel = 0;
3878         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3879                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3880         } else {
3881                 net->port = 0;
3882         }
3883 #ifdef INET
3884         if (newaddr->sa_family == AF_INET)
3885                 net->tos_flowlabel = stcb->asoc.default_tos;
3886 #endif
3887 #ifdef INET6
3888         if (newaddr->sa_family == AF_INET6)
3889                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3890 #endif
3891         /* Init the timer structure */
3892         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3893         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3894         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3895
3896         /* Now generate a route for this guy */
3897 #ifdef INET6
3898         /* KAME hack: embed scopeid */
3899         if (newaddr->sa_family == AF_INET6) {
3900                 struct sockaddr_in6 *sin6;
3901
3902                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3903                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3904                 sin6->sin6_scope_id = 0;
3905         }
3906 #endif
3907         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3908
3909         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3910                 /* Get source address */
3911                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3912                     stcb,
3913                     (sctp_route_t *) & net->ro,
3914                     net,
3915                     0,
3916                     stcb->asoc.vrf_id);
3917                 /* Now get the interface MTU */
3918                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3919                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3920                 } else {
3921                         net->mtu = 0;
3922                 }
3923                 if (net->mtu == 0) {
3924                         /* Huh ?? */
3925                         net->mtu = SCTP_DEFAULT_MTU;
3926                 } else {
3927                         uint32_t rmtu;
3928
3929                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3930                         if (rmtu == 0) {
3931                                 /*
3932                                  * Start things off to match mtu of
3933                                  * interface please.
3934                                  */
3935                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3936                                     net->ro.ro_rt, net->mtu);
3937                         } else {
3938                                 /*
3939                                  * we take the route mtu over the interface,
3940                                  * since the route may be leading out the
3941                                  * loopback, or a different interface.
3942                                  */
3943                                 net->mtu = rmtu;
3944                         }
3945                 }
3946                 if (from == SCTP_ALLOC_ASOC) {
3947                         stcb->asoc.smallest_mtu = net->mtu;
3948                 }
3949         } else {
3950                 net->mtu = stcb->asoc.smallest_mtu;
3951         }
3952 #ifdef INET6
3953         if (newaddr->sa_family == AF_INET6) {
3954                 struct sockaddr_in6 *sin6;
3955
3956                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3957                 (void)sa6_recoverscope(sin6);
3958         }
3959 #endif
3960         if (net->port) {
3961                 net->mtu -= sizeof(struct udphdr);
3962         }
3963         if (stcb->asoc.smallest_mtu > net->mtu) {
3964                 stcb->asoc.smallest_mtu = net->mtu;
3965         }
3966         /* JRS - Use the congestion control given in the CC module */
3967         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3968
3969         /*
3970          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3971          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3972          */
3973         net->find_pseudo_cumack = 1;
3974         net->find_rtx_pseudo_cumack = 1;
3975         net->src_addr_selected = 0;
3976         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3977         if (net->ro.ro_rt == NULL) {
3978                 /* Since we have no route put it at the back */
3979                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3980         } else if (netfirst == NULL) {
3981                 /* We are the first one in the pool. */
3982                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3983         } else if (netfirst->ro.ro_rt == NULL) {
3984                 /*
3985                  * First one has NO route. Place this one ahead of the first
3986                  * one.
3987                  */
3988                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3989         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3990                 /*
3991                  * This one has a different interface than the one at the
3992                  * top of the list. Place it ahead.
3993                  */
3994                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3995         } else {
3996                 /*
3997                  * Ok we have the same interface as the first one. Move
3998                  * forward until we find either a) one with a NULL route...
3999                  * insert ahead of that b) one with a different ifp.. insert
4000                  * after that. c) end of the list.. insert at the tail.
4001                  */
4002                 struct sctp_nets *netlook;
4003
4004                 do {
4005                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4006                         if (netlook == NULL) {
4007                                 /* End of the list */
4008                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4009                                 break;
4010                         } else if (netlook->ro.ro_rt == NULL) {
4011                                 /* next one has NO route */
4012                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4013                                 break;
4014                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4015                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4016                                     net, sctp_next);
4017                                 break;
4018                         }
4019                         /* Shift forward */
4020                         netfirst = netlook;
4021                 } while (netlook != NULL);
4022         }
4023
4024         /* got to have a primary set */
4025         if (stcb->asoc.primary_destination == 0) {
4026                 stcb->asoc.primary_destination = net;
4027         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4028                     (net->ro.ro_rt) &&
4029             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4030                 /* No route to current primary adopt new primary */
4031                 stcb->asoc.primary_destination = net;
4032         }
4033         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
4034             net);
4035         /* Validate primary is first */
4036         net = TAILQ_FIRST(&stcb->asoc.nets);
4037         if ((net != stcb->asoc.primary_destination) &&
4038             (stcb->asoc.primary_destination)) {
4039                 /*
4040                  * first one on the list is NOT the primary sctp_cmpaddr()
4041                  * is much more efficient if the primary is the first on the
4042                  * list, make it so.
4043                  */
4044                 TAILQ_REMOVE(&stcb->asoc.nets,
4045                     stcb->asoc.primary_destination, sctp_next);
4046                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4047                     stcb->asoc.primary_destination, sctp_next);
4048         }
4049         return (0);
4050 }
4051
4052
4053 static uint32_t
4054 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4055 {
4056         uint32_t id;
4057         struct sctpasochead *head;
4058         struct sctp_tcb *lstcb;
4059
4060         SCTP_INP_WLOCK(inp);
4061 try_again:
4062         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4063                 /* TSNH */
4064                 SCTP_INP_WUNLOCK(inp);
4065                 return (0);
4066         }
4067         /*
4068          * We don't allow assoc id to be 0, this is needed otherwise if the
4069          * id were to wrap we would have issues with some socket options.
4070          */
4071         if (inp->sctp_associd_counter == 0) {
4072                 inp->sctp_associd_counter++;
4073         }
4074         id = inp->sctp_associd_counter;
4075         inp->sctp_associd_counter++;
4076         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4077         if (lstcb) {
4078                 goto try_again;
4079         }
4080         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4081         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4082         stcb->asoc.in_asocid_hash = 1;
4083         SCTP_INP_WUNLOCK(inp);
4084         return id;
4085 }
4086
4087 /*
4088  * allocate an association and add it to the endpoint. The caller must be
4089  * careful to add all additional addresses once they are know right away or
4090  * else the assoc will be may experience a blackout scenario.
4091  */
4092 struct sctp_tcb *
4093 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4094     int *error, uint32_t override_tag, uint32_t vrf_id,
4095     struct thread *p
4096 )
4097 {
4098         /* note the p argument is only valid in unbound sockets */
4099
4100         struct sctp_tcb *stcb;
4101         struct sctp_association *asoc;
4102         struct sctpasochead *head;
4103         uint16_t rport;
4104         int err;
4105
4106         /*
4107          * Assumption made here: Caller has done a
4108          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4109          * address does not exist already.
4110          */
4111         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4112                 /* Hit max assoc, sorry no more */
4113                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4114                 *error = ENOBUFS;
4115                 return (NULL);
4116         }
4117         if (firstaddr == NULL) {
4118                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4119                 *error = EINVAL;
4120                 return (NULL);
4121         }
4122         SCTP_INP_RLOCK(inp);
4123         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4124             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4125             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4126                 /*
4127                  * If its in the TCP pool, its NOT allowed to create an
4128                  * association. The parent listener needs to call
4129                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4130                  * off, or connected one does this.. its an error.
4131                  */
4132                 SCTP_INP_RUNLOCK(inp);
4133                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4134                 *error = EINVAL;
4135                 return (NULL);
4136         }
4137         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4138 #ifdef SCTP_DEBUG
4139         if (firstaddr) {
4140                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4141                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4142                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4143         } else {
4144                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4145         }
4146 #endif                          /* SCTP_DEBUG */
4147         if (firstaddr->sa_family == AF_INET) {
4148                 struct sockaddr_in *sin;
4149
4150                 sin = (struct sockaddr_in *)firstaddr;
4151                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4152                         /* Invalid address */
4153                         SCTP_INP_RUNLOCK(inp);
4154                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4155                         *error = EINVAL;
4156                         return (NULL);
4157                 }
4158                 rport = sin->sin_port;
4159         } else if (firstaddr->sa_family == AF_INET6) {
4160                 struct sockaddr_in6 *sin6;
4161
4162                 sin6 = (struct sockaddr_in6 *)firstaddr;
4163                 if ((sin6->sin6_port == 0) ||
4164                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4165                         /* Invalid address */
4166                         SCTP_INP_RUNLOCK(inp);
4167                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4168                         *error = EINVAL;
4169                         return (NULL);
4170                 }
4171                 rport = sin6->sin6_port;
4172         } else {
4173                 /* not supported family type */
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         SCTP_INP_RUNLOCK(inp);
4180         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4181                 /*
4182                  * If you have not performed a bind, then we need to do the
4183                  * ephemeral bind for you.
4184                  */
4185                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4186                     (struct sockaddr *)NULL,
4187                     (struct sctp_ifa *)NULL,
4188                     p
4189                     ))) {
4190                         /* bind error, probably perm */
4191                         *error = err;
4192                         return (NULL);
4193                 }
4194         }
4195         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4196         if (stcb == NULL) {
4197                 /* out of memory? */
4198                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4199                 *error = ENOMEM;
4200                 return (NULL);
4201         }
4202         SCTP_INCR_ASOC_COUNT();
4203
4204         bzero(stcb, sizeof(*stcb));
4205         asoc = &stcb->asoc;
4206
4207         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4208         SCTP_TCB_LOCK_INIT(stcb);
4209         SCTP_TCB_SEND_LOCK_INIT(stcb);
4210         stcb->rport = rport;
4211         /* setup back pointer's */
4212         stcb->sctp_ep = inp;
4213         stcb->sctp_socket = inp->sctp_socket;
4214         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4215                 /* failed */
4216                 SCTP_TCB_LOCK_DESTROY(stcb);
4217                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4218                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4219                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4220                 SCTP_DECR_ASOC_COUNT();
4221                 *error = err;
4222                 return (NULL);
4223         }
4224         /* and the port */
4225         SCTP_INP_INFO_WLOCK();
4226         SCTP_INP_WLOCK(inp);
4227         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4228                 /* inpcb freed while alloc going on */
4229                 SCTP_TCB_LOCK_DESTROY(stcb);
4230                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4231                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4232                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4233                 SCTP_INP_WUNLOCK(inp);
4234                 SCTP_INP_INFO_WUNLOCK();
4235                 SCTP_DECR_ASOC_COUNT();
4236                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4237                 *error = EINVAL;
4238                 return (NULL);
4239         }
4240         SCTP_TCB_LOCK(stcb);
4241
4242         /* now that my_vtag is set, add it to the hash */
4243         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4244         /* put it in the bucket in the vtag hash of assoc's for the system */
4245         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4246         SCTP_INP_INFO_WUNLOCK();
4247
4248         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4249                 /* failure.. memory error? */
4250                 if (asoc->strmout) {
4251                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4252                         asoc->strmout = NULL;
4253                 }
4254                 if (asoc->mapping_array) {
4255                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4256                         asoc->mapping_array = NULL;
4257                 }
4258                 if (asoc->nr_mapping_array) {
4259                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4260                         asoc->nr_mapping_array = NULL;
4261                 }
4262                 SCTP_DECR_ASOC_COUNT();
4263                 SCTP_TCB_LOCK_DESTROY(stcb);
4264                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4265                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4266                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4267                 SCTP_INP_WUNLOCK(inp);
4268                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4269                 *error = ENOBUFS;
4270                 return (NULL);
4271         }
4272         /* Init all the timers */
4273         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4274         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4275         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4276         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4277         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4278         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4279         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4280         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4281
4282         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4283         /* now file the port under the hash as well */
4284         if (inp->sctp_tcbhash != NULL) {
4285                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4286                     inp->sctp_hashmark)];
4287                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4288         }
4289         SCTP_INP_WUNLOCK(inp);
4290         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4291         return (stcb);
4292 }
4293
4294
4295 void
4296 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4297 {
4298         struct sctp_association *asoc;
4299
4300         asoc = &stcb->asoc;
4301         asoc->numnets--;
4302         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4303         if (net == asoc->primary_destination) {
4304                 /* Reset primary */
4305                 struct sctp_nets *lnet;
4306
4307                 lnet = TAILQ_FIRST(&asoc->nets);
4308                 /*
4309                  * Mobility adaptation Ideally, if deleted destination is
4310                  * the primary, it becomes a fast retransmission trigger by
4311                  * the subsequent SET PRIMARY. (by micchie)
4312                  */
4313                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4314                     SCTP_MOBILITY_BASE) ||
4315                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4316                     SCTP_MOBILITY_FASTHANDOFF)) {
4317                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4318                         if (asoc->deleted_primary != NULL) {
4319                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4320                                 goto out;
4321                         }
4322                         asoc->deleted_primary = net;
4323                         atomic_add_int(&net->ref_count, 1);
4324                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4325                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4326                         sctp_mobility_feature_on(stcb->sctp_ep,
4327                             SCTP_MOBILITY_PRIM_DELETED);
4328                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4329                             stcb->sctp_ep, stcb, NULL);
4330                 }
4331 out:
4332                 /* Try to find a confirmed primary */
4333                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4334         }
4335         if (net == asoc->last_data_chunk_from) {
4336                 /* Reset primary */
4337                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4338         }
4339         if (net == asoc->last_control_chunk_from) {
4340                 /* Clear net */
4341                 asoc->last_control_chunk_from = NULL;
4342         }
4343         sctp_free_remote_addr(net);
4344 }
4345
4346 /*
4347  * remove a remote endpoint address from an association, it will fail if the
4348  * address does not exist.
4349  */
4350 int
4351 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4352 {
4353         /*
4354          * Here we need to remove a remote address. This is quite simple, we
4355          * first find it in the list of address for the association
4356          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4357          * on that item. Note we do not allow it to be removed if there are
4358          * no other addresses.
4359          */
4360         struct sctp_association *asoc;
4361         struct sctp_nets *net, *net_tmp;
4362
4363         asoc = &stcb->asoc;
4364
4365         /* locate the address */
4366         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4367                 net_tmp = TAILQ_NEXT(net, sctp_next);
4368                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4369                         continue;
4370                 }
4371                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4372                     remaddr)) {
4373                         /* we found the guy */
4374                         if (asoc->numnets < 2) {
4375                                 /* Must have at LEAST two remote addresses */
4376                                 return (-1);
4377                         } else {
4378                                 sctp_remove_net(stcb, net);
4379                                 return (0);
4380                         }
4381                 }
4382         }
4383         /* not found. */
4384         return (-2);
4385 }
4386
4387 void
4388 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4389 {
4390         struct sctpvtaghead *chain;
4391         struct sctp_tagblock *twait_block;
4392         int found = 0;
4393         int i;
4394
4395         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4396         if (!LIST_EMPTY(chain)) {
4397                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4398                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4399                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4400                                     (twait_block->vtag_block[i].lport == lport) &&
4401                                     (twait_block->vtag_block[i].rport == rport)) {
4402                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4403                                         twait_block->vtag_block[i].v_tag = 0;
4404                                         twait_block->vtag_block[i].lport = 0;
4405                                         twait_block->vtag_block[i].rport = 0;
4406                                         found = 1;
4407                                         break;
4408                                 }
4409                         }
4410                         if (found)
4411                                 break;
4412                 }
4413         }
4414 }
4415
4416 int
4417 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4418 {
4419         struct sctpvtaghead *chain;
4420         struct sctp_tagblock *twait_block;
4421         int found = 0;
4422         int i;
4423
4424         SCTP_INP_INFO_WLOCK();
4425         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4426         if (!LIST_EMPTY(chain)) {
4427                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4428                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4429                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4430                                     (twait_block->vtag_block[i].lport == lport) &&
4431                                     (twait_block->vtag_block[i].rport == rport)) {
4432                                         found = 1;
4433                                         break;
4434                                 }
4435                         }
4436                         if (found)
4437                                 break;
4438                 }
4439         }
4440         SCTP_INP_INFO_WUNLOCK();
4441         return (found);
4442 }
4443
4444
4445 void
4446 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4447 {
4448         struct sctpvtaghead *chain;
4449         struct sctp_tagblock *twait_block;
4450         struct timeval now;
4451         int set, i;
4452
4453         if (time == 0) {
4454                 /* Its disabled */
4455                 return;
4456         }
4457         (void)SCTP_GETTIME_TIMEVAL(&now);
4458         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4459         set = 0;
4460         if (!LIST_EMPTY(chain)) {
4461                 /* Block(s) present, lets find space, and expire on the fly */
4462                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4463                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4464                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4465                                     !set) {
4466                                         twait_block->vtag_block[i].tv_sec_at_expire =
4467                                             now.tv_sec + time;
4468                                         twait_block->vtag_block[i].v_tag = tag;
4469                                         twait_block->vtag_block[i].lport = lport;
4470                                         twait_block->vtag_block[i].rport = rport;
4471                                         set = 1;
4472                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4473                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4474                                         /* Audit expires this guy */
4475                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4476                                         twait_block->vtag_block[i].v_tag = 0;
4477                                         twait_block->vtag_block[i].lport = 0;
4478                                         twait_block->vtag_block[i].rport = 0;
4479                                         if (set == 0) {
4480                                                 /* Reuse it for my new tag */
4481                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4482                                                 twait_block->vtag_block[i].v_tag = tag;
4483                                                 twait_block->vtag_block[i].lport = lport;
4484                                                 twait_block->vtag_block[i].rport = rport;
4485                                                 set = 1;
4486                                         }
4487                                 }
4488                         }
4489                         if (set) {
4490                                 /*
4491                                  * We only do up to the block where we can
4492                                  * place our tag for audits
4493                                  */
4494                                 break;
4495                         }
4496                 }
4497         }
4498         /* Need to add a new block to chain */
4499         if (!set) {
4500                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4501                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4502                 if (twait_block == NULL) {
4503 #ifdef INVARIANTS
4504                         panic("Can not alloc tagblock");
4505 #endif
4506                         return;
4507                 }
4508                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4509                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4510                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4511                 twait_block->vtag_block[0].v_tag = tag;
4512                 twait_block->vtag_block[0].lport = lport;
4513                 twait_block->vtag_block[0].rport = rport;
4514         }
4515 }
4516
4517
4518
4519 /*-
4520  * Free the association after un-hashing the remote port. This
4521  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4522  * expect that the input to this function IS a locked TCB.
4523  * It will return 0, if it did NOT destroy the association (instead
4524  * it unlocks it. It will return NON-zero if it either destroyed the
4525  * association OR the association is already destroyed.
4526  */
4527 int
4528 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4529 {
4530         int i;
4531         struct sctp_association *asoc;
4532         struct sctp_nets *net, *prev;
4533         struct sctp_laddr *laddr;
4534         struct sctp_tmit_chunk *chk;
4535         struct sctp_asconf_addr *aparam;
4536         struct sctp_asconf_ack *aack;
4537         struct sctp_stream_reset_list *liste;
4538         struct sctp_queued_to_read *sq;
4539         struct sctp_stream_queue_pending *sp;
4540         sctp_sharedkey_t *shared_key;
4541         struct socket *so;
4542         int ccnt = 0;
4543         int cnt = 0;
4544
4545         /* first, lets purge the entry from the hash table. */
4546
4547 #ifdef SCTP_LOG_CLOSING
4548         sctp_log_closing(inp, stcb, 6);
4549 #endif
4550         if (stcb->asoc.state == 0) {
4551 #ifdef SCTP_LOG_CLOSING
4552                 sctp_log_closing(inp, NULL, 7);
4553 #endif
4554                 /* there is no asoc, really TSNH :-0 */
4555                 return (1);
4556         }
4557         /* TEMP CODE */
4558         if (stcb->freed_from_where == 0) {
4559                 /* Only record the first place free happened from */
4560                 stcb->freed_from_where = from_location;
4561         }
4562         /* TEMP CODE */
4563
4564         asoc = &stcb->asoc;
4565         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4566             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4567                 /* nothing around */
4568                 so = NULL;
4569         else
4570                 so = inp->sctp_socket;
4571
4572         /*
4573          * We used timer based freeing if a reader or writer is in the way.
4574          * So we first check if we are actually being called from a timer,
4575          * if so we abort early if a reader or writer is still in the way.
4576          */
4577         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4578             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4579                 /*
4580                  * is it the timer driving us? if so are the reader/writers
4581                  * gone?
4582                  */
4583                 if (stcb->asoc.refcnt) {
4584                         /* nope, reader or writer in the way */
4585                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4586                         /* no asoc destroyed */
4587                         SCTP_TCB_UNLOCK(stcb);
4588 #ifdef SCTP_LOG_CLOSING
4589                         sctp_log_closing(inp, stcb, 8);
4590 #endif
4591                         return (0);
4592                 }
4593         }
4594         /* now clean up any other timers */
4595         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4596         asoc->hb_timer.self = NULL;
4597         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4598         asoc->dack_timer.self = NULL;
4599         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4600         /*-
4601          * For stream reset we don't blast this unless
4602          * it is a str-reset timer, it might be the
4603          * free-asoc timer which we DON'T want to
4604          * disturb.
4605          */
4606         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4607                 asoc->strreset_timer.self = NULL;
4608         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4609         asoc->asconf_timer.self = NULL;
4610         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4611         asoc->autoclose_timer.self = NULL;
4612         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4613         asoc->shut_guard_timer.self = NULL;
4614         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4615         asoc->delayed_event_timer.self = NULL;
4616         /* Mobility adaptation */
4617         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4618         asoc->delete_prim_timer.self = NULL;
4619         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4620                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4621                 net->fr_timer.self = NULL;
4622                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4623                 net->rxt_timer.self = NULL;
4624                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4625                 net->pmtu_timer.self = NULL;
4626         }
4627         /* Now the read queue needs to be cleaned up (only once) */
4628         cnt = 0;
4629         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4630                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4631                 SCTP_INP_READ_LOCK(inp);
4632                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4633                         if (sq->stcb == stcb) {
4634                                 sq->do_not_ref_stcb = 1;
4635                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4636                                 /*
4637                                  * If there is no end, there never will be
4638                                  * now.
4639                                  */
4640                                 if (sq->end_added == 0) {
4641                                         /* Held for PD-API clear that. */
4642                                         sq->pdapi_aborted = 1;
4643                                         sq->held_length = 0;
4644                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4645                                                 /*
4646                                                  * Need to add a PD-API
4647                                                  * aborted indication.
4648                                                  * Setting the control_pdapi
4649                                                  * assures that it will be
4650                                                  * added right after this
4651                                                  * msg.
4652                                                  */
4653                                                 uint32_t strseq;
4654
4655                                                 stcb->asoc.control_pdapi = sq;
4656                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4657                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4658                                                     stcb,
4659                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4660                                                     (void *)&strseq,
4661                                                     SCTP_SO_LOCKED);
4662                                                 stcb->asoc.control_pdapi = NULL;
4663                                         }
4664                                 }
4665                                 /* Add an end to wake them */
4666                                 sq->end_added = 1;
4667                                 cnt++;
4668                         }
4669                 }
4670                 SCTP_INP_READ_UNLOCK(inp);
4671                 if (stcb->block_entry) {
4672                         cnt++;
4673                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4674                         stcb->block_entry->error = ECONNRESET;
4675                         stcb->block_entry = NULL;
4676                 }
4677         }
4678         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4679                 /*
4680                  * Someone holds a reference OR the socket is unaccepted
4681                  * yet.
4682                  */
4683                 if ((stcb->asoc.refcnt) ||
4684                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4685                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4686                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4687                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4688                 }
4689                 SCTP_TCB_UNLOCK(stcb);
4690                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4691                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4692                         /* nothing around */
4693                         so = NULL;
4694                 if (so) {
4695                         /* Wake any reader/writers */
4696                         sctp_sorwakeup(inp, so);
4697                         sctp_sowwakeup(inp, so);
4698                 }
4699 #ifdef SCTP_LOG_CLOSING
4700                 sctp_log_closing(inp, stcb, 9);
4701 #endif
4702                 /* no asoc destroyed */
4703                 return (0);
4704         }
4705 #ifdef SCTP_LOG_CLOSING
4706         sctp_log_closing(inp, stcb, 10);
4707 #endif
4708         /*
4709          * When I reach here, no others want to kill the assoc yet.. and I
4710          * own the lock. Now its possible an abort comes in when I do the
4711          * lock exchange below to grab all the locks to do the final take
4712          * out. to prevent this we increment the count, which will start a
4713          * timer and blow out above thus assuring us that we hold exclusive
4714          * killing of the asoc. Note that after getting back the TCB lock we
4715          * will go ahead and increment the counter back up and stop any
4716          * timer a passing stranger may have started :-S
4717          */
4718         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4719                 atomic_add_int(&stcb->asoc.refcnt, 1);
4720
4721                 SCTP_TCB_UNLOCK(stcb);
4722                 SCTP_INP_INFO_WLOCK();
4723                 SCTP_INP_WLOCK(inp);
4724                 SCTP_TCB_LOCK(stcb);
4725         }
4726         /* Double check the GONE flag */
4727         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4728             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4729                 /* nothing around */
4730                 so = NULL;
4731
4732         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4733             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4734                 /*
4735                  * For TCP type we need special handling when we are
4736                  * connected. We also include the peel'ed off ones to.
4737                  */
4738                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4739                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4740                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4741                         if (so) {
4742                                 SOCK_LOCK(so);
4743                                 if (so->so_rcv.sb_cc == 0) {
4744                                         so->so_state &= ~(SS_ISCONNECTING |
4745                                             SS_ISDISCONNECTING |
4746                                             SS_ISCONFIRMING |
4747                                             SS_ISCONNECTED);
4748                                 }
4749                                 socantrcvmore_locked(so);
4750                                 sctp_sowwakeup(inp, so);
4751                                 sctp_sorwakeup(inp, so);
4752                                 SCTP_SOWAKEUP(so);
4753                         }
4754                 }
4755         }
4756         /*
4757          * Make it invalid too, that way if its about to run it will abort
4758          * and return.
4759          */
4760         /* re-increment the lock */
4761         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4762                 atomic_add_int(&stcb->asoc.refcnt, -1);
4763         }
4764         if (stcb->asoc.refcnt) {
4765                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4766                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4767                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4768                         SCTP_INP_INFO_WUNLOCK();
4769                         SCTP_INP_WUNLOCK(inp);
4770                 }
4771                 SCTP_TCB_UNLOCK(stcb);
4772                 return (0);
4773         }
4774         asoc->state = 0;
4775         if (inp->sctp_tcbhash) {
4776                 LIST_REMOVE(stcb, sctp_tcbhash);
4777         }
4778         if (stcb->asoc.in_asocid_hash) {
4779                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4780         }
4781         /* Now lets remove it from the list of ALL associations in the EP */
4782         LIST_REMOVE(stcb, sctp_tcblist);
4783         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4784                 SCTP_INP_INCR_REF(inp);
4785                 SCTP_INP_WUNLOCK(inp);
4786         }
4787         /* pull from vtag hash */
4788         LIST_REMOVE(stcb, sctp_asocs);
4789         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4790             inp->sctp_lport, stcb->rport);
4791
4792         /*
4793          * Now restop the timers to be sure this is paranoia at is finest!
4794          */
4795         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4796         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4797         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4798         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4799         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4800         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4801         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4802         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4803         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4804                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4805                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4806                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4807         }
4808
4809         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4810         prev = NULL;
4811         /*
4812          * The chunk lists and such SHOULD be empty but we check them just
4813          * in case.
4814          */
4815         /* anything on the wheel needs to be removed */
4816         for (i = 0; i < asoc->streamoutcnt; i++) {
4817                 struct sctp_stream_out *outs;
4818
4819                 outs = &asoc->strmout[i];
4820                 /* now clean up any chunks here */
4821                 sp = TAILQ_FIRST(&outs->outqueue);
4822                 while (sp) {
4823                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4824                         if (sp->data) {
4825                                 if (so) {
4826                                         /* Still an open socket - report */
4827                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4828                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
4829                                             (void *)sp, SCTP_SO_LOCKED);
4830                                 }
4831                                 if (sp->data) {
4832                                         sctp_m_freem(sp->data);
4833                                         sp->data = NULL;
4834                                         sp->tail_mbuf = NULL;
4835                                 }
4836                         }
4837                         if (sp->net) {
4838                                 sctp_free_remote_addr(sp->net);
4839                                 sp->net = NULL;
4840                         }
4841                         sctp_free_spbufspace(stcb, asoc, sp);
4842                         if (sp->holds_key_ref)
4843                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4844                         /* Free the zone stuff  */
4845                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4846                         SCTP_DECR_STRMOQ_COUNT();
4847                         /* sa_ignore FREED_MEMORY */
4848                         sp = TAILQ_FIRST(&outs->outqueue);
4849                 }
4850         }
4851
4852         /* sa_ignore FREED_MEMORY */
4853         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4854                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4855                 SCTP_FREE(liste, SCTP_M_STRESET);
4856         }
4857
4858         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4859         while (sq) {
4860                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4861                 if (sq->data) {
4862                         sctp_m_freem(sq->data);
4863                         sq->data = NULL;
4864                 }
4865                 sctp_free_remote_addr(sq->whoFrom);
4866                 sq->whoFrom = NULL;
4867                 sq->stcb = NULL;
4868                 /* Free the ctl entry */
4869                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4870                 SCTP_DECR_READQ_COUNT();
4871                 /* sa_ignore FREED_MEMORY */
4872                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4873         }
4874
4875         chk = TAILQ_FIRST(&asoc->free_chunks);
4876         while (chk) {
4877                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4878                 if (chk->data) {
4879                         sctp_m_freem(chk->data);
4880                         chk->data = NULL;
4881                 }
4882                 if (chk->holds_key_ref)
4883                         sctp_auth_key_release(stcb, chk->auth_keyid);
4884                 ccnt++;
4885                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4886                 SCTP_DECR_CHK_COUNT();
4887                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4888                 asoc->free_chunk_cnt--;
4889                 /* sa_ignore FREED_MEMORY */
4890                 chk = TAILQ_FIRST(&asoc->free_chunks);
4891         }
4892         /* pending send queue SHOULD be empty */
4893         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4894                 chk = TAILQ_FIRST(&asoc->send_queue);
4895                 while (chk) {
4896                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4897                         if (chk->data) {
4898                                 if (so) {
4899                                         /* Still a socket? */
4900                                         sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4901                                             SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
4902                                 }
4903                                 if (chk->data) {
4904                                         sctp_m_freem(chk->data);
4905                                         chk->data = NULL;
4906                                 }
4907                         }
4908                         if (chk->holds_key_ref)
4909                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4910                         ccnt++;
4911                         if (chk->whoTo) {
4912                                 sctp_free_remote_addr(chk->whoTo);
4913                                 chk->whoTo = NULL;
4914                         }
4915                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4916                         SCTP_DECR_CHK_COUNT();
4917                         /* sa_ignore FREED_MEMORY */
4918                         chk = TAILQ_FIRST(&asoc->send_queue);
4919                 }
4920         }
4921 /*
4922   if (ccnt) {
4923   printf("Freed %d from send_queue\n", ccnt);
4924   ccnt = 0;
4925   }
4926 */
4927         /* sent queue SHOULD be empty */
4928         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4929                 chk = TAILQ_FIRST(&asoc->sent_queue);
4930                 while (chk) {
4931                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4932                         if (chk->data) {
4933                                 if (so) {
4934                                         /* Still a socket? */
4935                                         sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4936                                             SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
4937                                 }
4938                                 if (chk->data) {
4939                                         sctp_m_freem(chk->data);
4940                                         chk->data = NULL;
4941                                 }
4942                         }
4943                         if (chk->holds_key_ref)
4944                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4945                         ccnt++;
4946                         sctp_free_remote_addr(chk->whoTo);
4947                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4948                         SCTP_DECR_CHK_COUNT();
4949                         /* sa_ignore FREED_MEMORY */
4950                         chk = TAILQ_FIRST(&asoc->sent_queue);
4951                 }
4952         }
4953 /*
4954   if (ccnt) {
4955   printf("Freed %d from sent_queue\n", ccnt);
4956   ccnt = 0;
4957   }
4958 */
4959         /* control queue MAY not be empty */
4960         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4961                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4962                 while (chk) {
4963                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4964                         if (chk->data) {
4965                                 sctp_m_freem(chk->data);
4966                                 chk->data = NULL;
4967                         }
4968                         if (chk->holds_key_ref)
4969                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4970                         ccnt++;
4971                         sctp_free_remote_addr(chk->whoTo);
4972                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4973                         SCTP_DECR_CHK_COUNT();
4974                         /* sa_ignore FREED_MEMORY */
4975                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4976                 }
4977         }
4978 /*
4979   if (ccnt) {
4980   printf("Freed %d from ctrl_queue\n", ccnt);
4981   ccnt = 0;
4982   }
4983 */
4984
4985         /* ASCONF queue MAY not be empty */
4986         if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4987                 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4988                 while (chk) {
4989                         TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4990                         if (chk->data) {
4991                                 sctp_m_freem(chk->data);
4992                                 chk->data = NULL;
4993                         }
4994                         if (chk->holds_key_ref)
4995                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4996                         ccnt++;
4997                         sctp_free_remote_addr(chk->whoTo);
4998                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4999                         SCTP_DECR_CHK_COUNT();
5000                         /* sa_ignore FREED_MEMORY */
5001                         chk = TAILQ_FIRST(&asoc->asconf_send_queue);
5002                 }
5003         }
5004 /*
5005   if (ccnt) {
5006   printf("Freed %d from asconf_queue\n", ccnt);
5007   ccnt = 0;
5008   }
5009 */
5010         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
5011                 chk = TAILQ_FIRST(&asoc->reasmqueue);
5012                 while (chk) {
5013                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5014                         if (chk->data) {
5015                                 sctp_m_freem(chk->data);
5016                                 chk->data = NULL;
5017                         }
5018                         if (chk->holds_key_ref)
5019                                 sctp_auth_key_release(stcb, chk->auth_keyid);
5020                         sctp_free_remote_addr(chk->whoTo);
5021                         ccnt++;
5022                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5023                         SCTP_DECR_CHK_COUNT();
5024                         /* sa_ignore FREED_MEMORY */
5025                         chk = TAILQ_FIRST(&asoc->reasmqueue);
5026                 }
5027         }
5028 /*
5029   if (ccnt) {
5030   printf("Freed %d from reasm_queue\n", ccnt);
5031   ccnt = 0;
5032   }
5033 */
5034         if (asoc->mapping_array) {
5035                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5036                 asoc->mapping_array = NULL;
5037         }
5038         if (asoc->nr_mapping_array) {
5039                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5040                 asoc->nr_mapping_array = NULL;
5041         }
5042         /* the stream outs */
5043         if (asoc->strmout) {
5044                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5045                 asoc->strmout = NULL;
5046         }
5047         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5048         if (asoc->strmin) {
5049                 struct sctp_queued_to_read *ctl;
5050
5051                 for (i = 0; i < asoc->streamincnt; i++) {
5052                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
5053                                 /* We have somethings on the streamin queue */
5054                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
5055                                 while (ctl) {
5056                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
5057                                             ctl, next);
5058                                         sctp_free_remote_addr(ctl->whoFrom);
5059                                         if (ctl->data) {
5060                                                 sctp_m_freem(ctl->data);
5061                                                 ctl->data = NULL;
5062                                         }
5063                                         /*
5064                                          * We don't free the address here
5065                                          * since all the net's were freed
5066                                          * above.
5067                                          */
5068                                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5069                                         SCTP_DECR_READQ_COUNT();
5070                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
5071                                 }
5072                         }
5073                 }
5074                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5075                 asoc->strmin = NULL;
5076         }
5077         asoc->streamincnt = 0;
5078         while (!TAILQ_EMPTY(&asoc->nets)) {
5079                 /* sa_ignore FREED_MEMORY */
5080                 net = TAILQ_FIRST(&asoc->nets);
5081                 /* pull from list */
5082                 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
5083 #ifdef INVARIANTS
5084                         panic("no net's left alloc'ed, or list points to itself");
5085 #endif
5086                         break;
5087                 }
5088                 prev = net;
5089                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5090                 sctp_free_remote_addr(net);
5091         }
5092
5093         while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
5094                 /* sa_ignore FREED_MEMORY */
5095                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
5096                 sctp_remove_laddr(laddr);
5097         }
5098
5099         /* pending asconf (address) parameters */
5100         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
5101                 /* sa_ignore FREED_MEMORY */
5102                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
5103                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5104                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5105         }
5106         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
5107                 /* sa_ignore FREED_MEMORY */
5108                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
5109                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5110                 if (aack->data != NULL) {
5111                         sctp_m_freem(aack->data);
5112                 }
5113                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5114         }
5115         /* clean up auth stuff */
5116         if (asoc->local_hmacs)
5117                 sctp_free_hmaclist(asoc->local_hmacs);
5118         if (asoc->peer_hmacs)
5119                 sctp_free_hmaclist(asoc->peer_hmacs);
5120
5121         if (asoc->local_auth_chunks)
5122                 sctp_free_chunklist(asoc->local_auth_chunks);
5123         if (asoc->peer_auth_chunks)
5124                 sctp_free_chunklist(asoc->peer_auth_chunks);
5125
5126         sctp_free_authinfo(&asoc->authinfo);
5127
5128         shared_key = LIST_FIRST(&asoc->shared_keys);
5129         while (shared_key) {
5130                 LIST_REMOVE(shared_key, next);
5131                 sctp_free_sharedkey(shared_key);
5132                 /* sa_ignore FREED_MEMORY */
5133                 shared_key = LIST_FIRST(&asoc->shared_keys);
5134         }
5135
5136         /* Insert new items here :> */
5137
5138         /* Get rid of LOCK */
5139         SCTP_TCB_LOCK_DESTROY(stcb);
5140         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5141         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5142                 SCTP_INP_INFO_WUNLOCK();
5143                 SCTP_INP_RLOCK(inp);
5144         }
5145 #ifdef SCTP_TRACK_FREED_ASOCS
5146         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5147                 /* now clean up the tasoc itself */
5148                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5149                 SCTP_DECR_ASOC_COUNT();
5150         } else {
5151                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5152         }
5153 #else
5154         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5155         SCTP_DECR_ASOC_COUNT();
5156 #endif
5157         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5158                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5159                         /*
5160                          * If its NOT the inp_free calling us AND sctp_close
5161                          * as been called, we call back...
5162                          */
5163                         SCTP_INP_RUNLOCK(inp);
5164                         /*
5165                          * This will start the kill timer (if we are the
5166                          * last one) since we hold an increment yet. But
5167                          * this is the only safe way to do this since
5168                          * otherwise if the socket closes at the same time
5169                          * we are here we might collide in the cleanup.
5170                          */
5171                         sctp_inpcb_free(inp,
5172                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5173                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5174                         SCTP_INP_DECR_REF(inp);
5175                         goto out_of;
5176                 } else {
5177                         /* The socket is still open. */
5178                         SCTP_INP_DECR_REF(inp);
5179                 }
5180         }
5181         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5182                 SCTP_INP_RUNLOCK(inp);
5183         }
5184 out_of:
5185         /* destroyed the asoc */
5186 #ifdef SCTP_LOG_CLOSING
5187         sctp_log_closing(inp, NULL, 11);
5188 #endif
5189         return (1);
5190 }
5191
5192
5193
5194 /*
5195  * determine if a destination is "reachable" based upon the addresses bound
5196  * to the current endpoint (e.g. only v4 or v6 currently bound)
5197  */
5198 /*
5199  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5200  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5201  * types bound as its endpoint
5202  */
5203 int
5204 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5205 {
5206         struct sctp_inpcb *inp;
5207         int answer;
5208
5209         /*
5210          * No locks here, the TCB, in all cases is already locked and an
5211          * assoc is up. There is either a INP lock by the caller applied (in
5212          * asconf case when deleting an address) or NOT in the HB case,
5213          * however if HB then the INP increment is up and the INP will not
5214          * be removed (on top of the fact that we have a TCB lock). So we
5215          * only want to read the sctp_flags, which is either bound-all or
5216          * not.. no protection needed since once an assoc is up you can't be
5217          * changing your binding.
5218          */
5219         inp = stcb->sctp_ep;
5220         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5221                 /* if bound all, destination is not restricted */
5222                 /*
5223                  * RRS: Question during lock work: Is this correct? If you
5224                  * are bound-all you still might need to obey the V4--V6
5225                  * flags??? IMO this bound-all stuff needs to be removed!
5226                  */
5227                 return (1);
5228         }
5229         /* NOTE: all "scope" checks are done when local addresses are added */
5230         if (destaddr->sa_family == AF_INET6) {
5231                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5232         } else if (destaddr->sa_family == AF_INET) {
5233                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5234         } else {
5235                 /* invalid family, so it's unreachable */
5236                 answer = 0;
5237         }
5238         return (answer);
5239 }
5240
5241 /*
5242  * update the inp_vflags on an endpoint
5243  */
5244 static void
5245 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5246 {
5247         struct sctp_laddr *laddr;
5248
5249         /* first clear the flag */
5250         inp->ip_inp.inp.inp_vflag = 0;
5251         /* set the flag based on addresses on the ep list */
5252         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5253                 if (laddr->ifa == NULL) {
5254                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5255                             __FUNCTION__);
5256                         continue;
5257                 }
5258                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5259                         continue;
5260                 }
5261                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5262                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5263                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5264                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5265                 }
5266         }
5267 }
5268
5269 /*
5270  * Add the address to the endpoint local address list There is nothing to be
5271  * done if we are bound to all addresses
5272  */
5273 void
5274 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5275 {
5276         struct sctp_laddr *laddr;
5277         int fnd, error = 0;
5278
5279         fnd = 0;
5280
5281         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5282                 /* You are already bound to all. You have it already */
5283                 return;
5284         }
5285         if (ifa->address.sa.sa_family == AF_INET6) {
5286                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5287                         /* Can't bind a non-useable addr. */
5288                         return;
5289                 }
5290         }
5291         /* first, is it already present? */
5292         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5293                 if (laddr->ifa == ifa) {
5294                         fnd = 1;
5295                         break;
5296                 }
5297         }
5298
5299         if (fnd == 0) {
5300                 /* Not in the ep list */
5301                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5302                 if (error != 0)
5303                         return;
5304                 inp->laddr_count++;
5305                 /* update inp_vflag flags */
5306                 if (ifa->address.sa.sa_family == AF_INET6) {
5307                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5308                 } else if (ifa->address.sa.sa_family == AF_INET) {
5309                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5310                 }
5311         }
5312         return;
5313 }
5314
5315
5316 /*
5317  * select a new (hopefully reachable) destination net (should only be used
5318  * when we deleted an ep addr that is the only usable source address to reach
5319  * the destination net)
5320  */
5321 static void
5322 sctp_select_primary_destination(struct sctp_tcb *stcb)
5323 {
5324         struct sctp_nets *net;
5325
5326         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5327                 /* for now, we'll just pick the first reachable one we find */
5328                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5329                         continue;
5330                 if (sctp_destination_is_reachable(stcb,
5331                     (struct sockaddr *)&net->ro._l_addr)) {
5332                         /* found a reachable destination */
5333                         stcb->asoc.primary_destination = net;
5334                 }
5335         }
5336         /* I can't there from here! ...we're gonna die shortly... */
5337 }
5338
5339
5340 /*
5341  * Delete the address from the endpoint local address list There is nothing
5342  * to be done if we are bound to all addresses
5343  */
5344 void
5345 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5346 {
5347         struct sctp_laddr *laddr;
5348         int fnd;
5349
5350         fnd = 0;
5351         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5352                 /* You are already bound to all. You have it already */
5353                 return;
5354         }
5355         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5356                 if (laddr->ifa == ifa) {
5357                         fnd = 1;
5358                         break;
5359                 }
5360         }
5361         if (fnd && (inp->laddr_count < 2)) {
5362                 /* can't delete unless there are at LEAST 2 addresses */
5363                 return;
5364         }
5365         if (fnd) {
5366                 /*
5367                  * clean up any use of this address go through our
5368                  * associations and clear any last_used_address that match
5369                  * this one for each assoc, see if a new primary_destination
5370                  * is needed
5371                  */
5372                 struct sctp_tcb *stcb;
5373
5374                 /* clean up "next_addr_touse" */
5375                 if (inp->next_addr_touse == laddr)
5376                         /* delete this address */
5377                         inp->next_addr_touse = NULL;
5378
5379                 /* clean up "last_used_address" */
5380                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5381                         struct sctp_nets *net;
5382
5383                         SCTP_TCB_LOCK(stcb);
5384                         if (stcb->asoc.last_used_address == laddr)
5385                                 /* delete this address */
5386                                 stcb->asoc.last_used_address = NULL;
5387                         /*
5388                          * Now spin through all the nets and purge any ref
5389                          * to laddr
5390                          */
5391                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5392                                 if (net->ro._s_addr &&
5393                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5394                                         /* Yep, purge src address selected */
5395                                         sctp_rtentry_t *rt;
5396
5397                                         /* delete this address if cached */
5398                                         rt = net->ro.ro_rt;
5399                                         if (rt != NULL) {
5400                                                 RTFREE(rt);
5401                                                 net->ro.ro_rt = NULL;
5402                                         }
5403                                         sctp_free_ifa(net->ro._s_addr);
5404                                         net->ro._s_addr = NULL;
5405                                         net->src_addr_selected = 0;
5406                                 }
5407                         }
5408                         SCTP_TCB_UNLOCK(stcb);
5409                 }               /* for each tcb */
5410                 /* remove it from the ep list */
5411                 sctp_remove_laddr(laddr);
5412                 inp->laddr_count--;
5413                 /* update inp_vflag flags */
5414                 sctp_update_ep_vflag(inp);
5415         }
5416         return;
5417 }
5418
5419 /*
5420  * Add the address to the TCB local address restricted list.
5421  * This is a "pending" address list (eg. addresses waiting for an
5422  * ASCONF-ACK response) and cannot be used as a valid source address.
5423  */
5424 void
5425 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5426 {
5427         struct sctp_inpcb *inp;
5428         struct sctp_laddr *laddr;
5429         struct sctpladdr *list;
5430
5431         /*
5432          * Assumes TCB is locked.. and possibly the INP. May need to
5433          * confirm/fix that if we need it and is not the case.
5434          */
5435         list = &stcb->asoc.sctp_restricted_addrs;
5436
5437         inp = stcb->sctp_ep;
5438         if (ifa->address.sa.sa_family == AF_INET6) {
5439                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5440                         /* Can't bind a non-existent addr. */
5441                         return;
5442                 }
5443         }
5444         /* does the address already exist? */
5445         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5446                 if (laddr->ifa == ifa) {
5447                         return;
5448                 }
5449         }
5450
5451         /* add to the list */
5452         (void)sctp_insert_laddr(list, ifa, 0);
5453         return;
5454 }
5455
5456 /*
5457  * insert an laddr entry with the given ifa for the desired list
5458  */
5459 int
5460 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5461 {
5462         struct sctp_laddr *laddr;
5463
5464         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5465         if (laddr == NULL) {
5466                 /* out of memory? */
5467                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5468                 return (EINVAL);
5469         }
5470         SCTP_INCR_LADDR_COUNT();
5471         bzero(laddr, sizeof(*laddr));
5472         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5473         laddr->ifa = ifa;
5474         laddr->action = act;
5475         atomic_add_int(&ifa->refcount, 1);
5476         /* insert it */
5477         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5478
5479         return (0);
5480 }
5481
5482 /*
5483  * Remove an laddr entry from the local address list (on an assoc)
5484  */
5485 void
5486 sctp_remove_laddr(struct sctp_laddr *laddr)
5487 {
5488
5489         /* remove from the list */
5490         LIST_REMOVE(laddr, sctp_nxt_addr);
5491         sctp_free_ifa(laddr->ifa);
5492         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5493         SCTP_DECR_LADDR_COUNT();
5494 }
5495
5496 /*
5497  * Remove a local address from the TCB local address restricted list
5498  */
5499 void
5500 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5501 {
5502         struct sctp_inpcb *inp;
5503         struct sctp_laddr *laddr;
5504
5505         /*
5506          * This is called by asconf work. It is assumed that a) The TCB is
5507          * locked and b) The INP is locked. This is true in as much as I can
5508          * trace through the entry asconf code where I did these locks.
5509          * Again, the ASCONF code is a bit different in that it does lock
5510          * the INP during its work often times. This must be since we don't
5511          * want other proc's looking up things while what they are looking
5512          * up is changing :-D
5513          */
5514
5515         inp = stcb->sctp_ep;
5516         /* if subset bound and don't allow ASCONF's, can't delete last */
5517         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5518             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5519                 if (stcb->sctp_ep->laddr_count < 2) {
5520                         /* can't delete last address */
5521                         return;
5522                 }
5523         }
5524         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5525                 /* remove the address if it exists */
5526                 if (laddr->ifa == NULL)
5527                         continue;
5528                 if (laddr->ifa == ifa) {
5529                         sctp_remove_laddr(laddr);
5530                         return;
5531                 }
5532         }
5533
5534         /* address not found! */
5535         return;
5536 }
5537
5538 /*
5539  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5540  */
5541 /* sysctl */
5542 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5543 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5544
5545 void
5546 sctp_pcb_init()
5547 {
5548         /*
5549          * SCTP initialization for the PCB structures should be called by
5550          * the sctp_init() funciton.
5551          */
5552         int i;
5553         struct timeval tv;
5554
5555         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5556                 /* error I was called twice */
5557                 return;
5558         }
5559         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5560
5561 #if defined(SCTP_LOCAL_TRACE_BUF)
5562         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5563 #endif
5564         (void)SCTP_GETTIME_TIMEVAL(&tv);
5565 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5566         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5567         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5568 #else
5569         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5570         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5571 #endif
5572         /* init the empty list of (All) Endpoints */
5573         LIST_INIT(&SCTP_BASE_INFO(listhead));
5574
5575
5576         /* init the hash table of endpoints */
5577         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5578         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5579         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5580         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5581             &SCTP_BASE_INFO(hashasocmark));
5582         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5583             &SCTP_BASE_INFO(hashmark));
5584         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5585             &SCTP_BASE_INFO(hashtcpmark));
5586         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5587
5588
5589         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5590             &SCTP_BASE_INFO(hashvrfmark));
5591
5592         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5593             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5594         /* init the zones */
5595         /*
5596          * FIX ME: Should check for NULL returns, but if it does fail we are
5597          * doomed to panic anyways... add later maybe.
5598          */
5599         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5600             sizeof(struct sctp_inpcb), maxsockets);
5601
5602         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5603             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5604
5605         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5606             sizeof(struct sctp_laddr),
5607             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5608
5609         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5610             sizeof(struct sctp_nets),
5611             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5612
5613         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5614             sizeof(struct sctp_tmit_chunk),
5615             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5616
5617         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5618             sizeof(struct sctp_queued_to_read),
5619             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5620
5621         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5622             sizeof(struct sctp_stream_queue_pending),
5623             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5624
5625         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5626             sizeof(struct sctp_asconf),
5627             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5628
5629         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5630             sizeof(struct sctp_asconf_ack),
5631             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5632
5633
5634         /* Master Lock INIT for info structure */
5635         SCTP_INP_INFO_LOCK_INIT();
5636         SCTP_STATLOG_INIT_LOCK();
5637
5638         SCTP_IPI_COUNT_INIT();
5639         SCTP_IPI_ADDR_INIT();
5640 #ifdef SCTP_PACKET_LOGGING
5641         SCTP_IP_PKTLOG_INIT();
5642 #endif
5643         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5644
5645         SCTP_WQ_ADDR_INIT();
5646         /* not sure if we need all the counts */
5647         SCTP_BASE_INFO(ipi_count_ep) = 0;
5648         /* assoc/tcb zone info */
5649         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5650         /* local addrlist zone info */
5651         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5652         /* remote addrlist zone info */
5653         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5654         /* chunk info */
5655         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5656
5657         /* socket queue zone info */
5658         SCTP_BASE_INFO(ipi_count_readq) = 0;
5659
5660         /* stream out queue cont */
5661         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5662
5663         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5664         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5665
5666         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5667
5668         /* Init the TIMEWAIT list */
5669         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5670                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5671         }
5672
5673         sctp_startup_iterator();
5674
5675         /*
5676          * INIT the default VRF which for BSD is the only one, other O/S's
5677          * may have more. But initially they must start with one and then
5678          * add the VRF's as addresses are added.
5679          */
5680         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5681
5682 }
5683
5684 /*
5685  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5686  */
5687 void
5688 sctp_pcb_finish(void)
5689 {
5690         struct sctp_vrflist *vrf_bucket;
5691         struct sctp_vrf *vrf;
5692         struct sctp_ifn *ifn;
5693         struct sctp_ifa *ifa;
5694         struct sctpvtaghead *chain;
5695         struct sctp_tagblock *twait_block, *prev_twait_block;
5696         struct sctp_laddr *wi;
5697         int i;
5698
5699         /*
5700          * Free BSD the it thread never exits but we do clean up. The only
5701          * way freebsd reaches here if we have VRF's but we still add the
5702          * ifdef to make it compile on old versions.
5703          */
5704         {
5705                 struct sctp_iterator *it, *nit;
5706
5707                 SCTP_IPI_ITERATOR_WQ_LOCK();
5708                 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
5709                 while (it) {
5710                         nit = TAILQ_NEXT(it, sctp_nxt_itr);
5711                         if (it->vn != curvnet) {
5712                                 it = nit;
5713                                 continue;
5714                         }
5715                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
5716                             it, sctp_nxt_itr);
5717                         if (it->function_atend != NULL) {
5718                                 (*it->function_atend) (it->pointer, it->val);
5719                         }
5720                         SCTP_FREE(it, SCTP_M_ITER);
5721                         it = nit;
5722                 }
5723                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5724                 SCTP_ITERATOR_LOCK();
5725                 if ((sctp_it_ctl.cur_it) &&
5726                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5727                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5728                 }
5729                 SCTP_ITERATOR_UNLOCK();
5730         }
5731
5732         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5733         SCTP_WQ_ADDR_LOCK();
5734         while ((wi = LIST_FIRST(&SCTP_BASE_INFO(addr_wq))) != NULL) {
5735                 LIST_REMOVE(wi, sctp_nxt_addr);
5736                 SCTP_DECR_LADDR_COUNT();
5737                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5738         }
5739         SCTP_WQ_ADDR_UNLOCK();
5740
5741         /*
5742          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5743          * destroyed first).
5744          */
5745         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5746         while ((vrf = LIST_FIRST(vrf_bucket)) != NULL) {
5747                 while ((ifn = LIST_FIRST(&vrf->ifnlist)) != NULL) {
5748                         while ((ifa = LIST_FIRST(&ifn->ifalist)) != NULL) {
5749                                 /* free the ifa */
5750                                 LIST_REMOVE(ifa, next_bucket);
5751                                 LIST_REMOVE(ifa, next_ifa);
5752                                 SCTP_FREE(ifa, SCTP_M_IFA);
5753                         }
5754                         /* free the ifn */
5755                         LIST_REMOVE(ifn, next_bucket);
5756                         LIST_REMOVE(ifn, next_ifn);
5757                         SCTP_FREE(ifn, SCTP_M_IFN);
5758                 }
5759                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5760                 /* free the vrf */
5761                 LIST_REMOVE(vrf, next_vrf);
5762                 SCTP_FREE(vrf, SCTP_M_VRF);
5763         }
5764         /* free the vrf hashes */
5765         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5766         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5767
5768         /*
5769          * free the TIMEWAIT list elements malloc'd in the function
5770          * sctp_add_vtag_to_timewait()...
5771          */
5772         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5773                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5774                 if (!LIST_EMPTY(chain)) {
5775                         prev_twait_block = NULL;
5776                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5777                                 if (prev_twait_block) {
5778                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5779                                 }
5780                                 prev_twait_block = twait_block;
5781                         }
5782                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5783                 }
5784         }
5785
5786         /* free the locks and mutexes */
5787 #ifdef SCTP_PACKET_LOGGING
5788         SCTP_IP_PKTLOG_DESTROY();
5789 #endif
5790         SCTP_IPI_ADDR_DESTROY();
5791         SCTP_STATLOG_DESTROY();
5792         SCTP_INP_INFO_LOCK_DESTROY();
5793
5794         SCTP_WQ_ADDR_DESTROY();
5795
5796         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5797         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5798         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5799         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5800         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5801         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5802         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5803         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5804         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5805         /* Get rid of other stuff to */
5806         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5807                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5808         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5809                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5810         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5811                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5812
5813 }
5814
5815
5816 int
5817 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5818     int iphlen, int offset, int limit, struct sctphdr *sh,
5819     struct sockaddr *altsa)
5820 {
5821         /*
5822          * grub through the INIT pulling addresses and loading them to the
5823          * nets structure in the asoc. The from address in the mbuf should
5824          * also be loaded (if it is not already). This routine can be called
5825          * with either INIT or INIT-ACK's as long as the m points to the IP
5826          * packet and the offset points to the beginning of the parameters.
5827          */
5828         struct sctp_inpcb *inp, *l_inp;
5829         struct sctp_nets *net, *net_tmp;
5830         struct ip *iph;
5831         struct sctp_paramhdr *phdr, parm_buf;
5832         struct sctp_tcb *stcb_tmp;
5833         uint16_t ptype, plen;
5834         struct sockaddr *sa;
5835         struct sockaddr_storage dest_store;
5836         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5837         struct sockaddr_in sin;
5838         struct sockaddr_in6 sin6;
5839         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5840         struct sctp_auth_random *p_random = NULL;
5841         uint16_t random_len = 0;
5842         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5843         struct sctp_auth_hmac_algo *hmacs = NULL;
5844         uint16_t hmacs_len = 0;
5845         uint8_t saw_asconf = 0;
5846         uint8_t saw_asconf_ack = 0;
5847         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5848         struct sctp_auth_chunk_list *chunks = NULL;
5849         uint16_t num_chunks = 0;
5850         sctp_key_t *new_key;
5851         uint32_t keylen;
5852         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5853
5854         /* First get the destination address setup too. */
5855         memset(&sin, 0, sizeof(sin));
5856         memset(&sin6, 0, sizeof(sin6));
5857
5858         sin.sin_family = AF_INET;
5859         sin.sin_len = sizeof(sin);
5860         sin.sin_port = stcb->rport;
5861
5862         sin6.sin6_family = AF_INET6;
5863         sin6.sin6_len = sizeof(struct sockaddr_in6);
5864         sin6.sin6_port = stcb->rport;
5865         if (altsa == NULL) {
5866                 iph = mtod(m, struct ip *);
5867                 switch (iph->ip_v) {
5868                 case IPVERSION:
5869                         {
5870                                 /* its IPv4 */
5871                                 struct sockaddr_in *sin_2;
5872
5873                                 sin_2 = (struct sockaddr_in *)(local_sa);
5874                                 memset(sin_2, 0, sizeof(sin));
5875                                 sin_2->sin_family = AF_INET;
5876                                 sin_2->sin_len = sizeof(sin);
5877                                 sin_2->sin_port = sh->dest_port;
5878                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5879                                 sin.sin_addr = iph->ip_src;
5880                                 sa = (struct sockaddr *)&sin;
5881                                 break;
5882                         }
5883 #ifdef INET6
5884                 case IPV6_VERSION >> 4:
5885                         {
5886                                 /* its IPv6 */
5887                                 struct ip6_hdr *ip6;
5888                                 struct sockaddr_in6 *sin6_2;
5889
5890                                 ip6 = mtod(m, struct ip6_hdr *);
5891                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5892                                 memset(sin6_2, 0, sizeof(sin6));
5893                                 sin6_2->sin6_family = AF_INET6;
5894                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5895                                 sin6_2->sin6_port = sh->dest_port;
5896                                 sin6.sin6_addr = ip6->ip6_src;
5897                                 sa = (struct sockaddr *)&sin6;
5898                                 break;
5899                         }
5900 #endif
5901                 default:
5902                         return (-1);
5903                         break;
5904                 }
5905         } else {
5906                 /*
5907                  * For cookies we use the src address NOT from the packet
5908                  * but from the original INIT
5909                  */
5910                 sa = altsa;
5911         }
5912         /* Turn off ECN until we get through all params */
5913         stcb->asoc.ecn_allowed = 0;
5914         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5915                 /* mark all addresses that we have currently on the list */
5916                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5917         }
5918         /* does the source address already exist? if so skip it */
5919         l_inp = inp = stcb->sctp_ep;
5920
5921         atomic_add_int(&stcb->asoc.refcnt, 1);
5922         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5923         atomic_add_int(&stcb->asoc.refcnt, -1);
5924
5925         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5926                 /* we must add the source address */
5927                 /* no scope set here since we have a tcb already. */
5928                 if ((sa->sa_family == AF_INET) &&
5929                     (stcb->asoc.ipv4_addr_legal)) {
5930                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5931                                 return (-1);
5932                         }
5933                 } else if ((sa->sa_family == AF_INET6) &&
5934                     (stcb->asoc.ipv6_addr_legal)) {
5935                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5936                                 return (-2);
5937                         }
5938                 }
5939         } else {
5940                 if (net_tmp != NULL && stcb_tmp == stcb) {
5941                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5942                 } else if (stcb_tmp != stcb) {
5943                         /* It belongs to another association? */
5944                         if (stcb_tmp)
5945                                 SCTP_TCB_UNLOCK(stcb_tmp);
5946                         return (-3);
5947                 }
5948         }
5949         if (stcb->asoc.state == 0) {
5950                 /* the assoc was freed? */
5951                 return (-4);
5952         }
5953         /*
5954          * peer must explicitly turn this on. This may have been initialized
5955          * to be "on" in order to allow local addr changes while INIT's are
5956          * in flight.
5957          */
5958         stcb->asoc.peer_supports_asconf = 0;
5959         /* now we must go through each of the params. */
5960         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5961         while (phdr) {
5962                 ptype = ntohs(phdr->param_type);
5963                 plen = ntohs(phdr->param_length);
5964                 /*
5965                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5966                  * (int)plen);
5967                  */
5968                 if (offset + plen > limit) {
5969                         break;
5970                 }
5971                 if (plen == 0) {
5972                         break;
5973                 }
5974                 if (ptype == SCTP_IPV4_ADDRESS) {
5975                         if (stcb->asoc.ipv4_addr_legal) {
5976                                 struct sctp_ipv4addr_param *p4, p4_buf;
5977
5978                                 /* ok get the v4 address and check/add */
5979                                 phdr = sctp_get_next_param(m, offset,
5980                                     (struct sctp_paramhdr *)&p4_buf,
5981                                     sizeof(p4_buf));
5982                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5983                                     phdr == NULL) {
5984                                         return (-5);
5985                                 }
5986                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5987                                 sin.sin_addr.s_addr = p4->addr;
5988                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
5989                                         /* Skip multi-cast addresses */
5990                                         goto next_param;
5991                                 }
5992                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5993                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5994                                         goto next_param;
5995                                 }
5996                                 sa = (struct sockaddr *)&sin;
5997                                 inp = stcb->sctp_ep;
5998                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5999                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6000                                     local_sa, stcb);
6001                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6002
6003                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6004                                     inp == NULL) {
6005                                         /* we must add the source address */
6006                                         /*
6007                                          * no scope set since we have a tcb
6008                                          * already
6009                                          */
6010
6011                                         /*
6012                                          * we must validate the state again
6013                                          * here
6014                                          */
6015                         add_it_now:
6016                                         if (stcb->asoc.state == 0) {
6017                                                 /* the assoc was freed? */
6018                                                 return (-7);
6019                                         }
6020                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6021                                                 return (-8);
6022                                         }
6023                                 } else if (stcb_tmp == stcb) {
6024                                         if (stcb->asoc.state == 0) {
6025                                                 /* the assoc was freed? */
6026                                                 return (-10);
6027                                         }
6028                                         if (net != NULL) {
6029                                                 /* clear flag */
6030                                                 net->dest_state &=
6031                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6032                                         }
6033                                 } else {
6034                                         /*
6035                                          * strange, address is in another
6036                                          * assoc? straighten out locks.
6037                                          */
6038                                         if (stcb_tmp) {
6039                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6040                                                         /*
6041                                                          * in setup state we
6042                                                          * abort this guy
6043                                                          */
6044                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6045                                                             stcb_tmp, 1, NULL, 0);
6046                                                         goto add_it_now;
6047                                                 }
6048                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6049                                         }
6050                                         if (stcb->asoc.state == 0) {
6051                                                 /* the assoc was freed? */
6052                                                 return (-12);
6053                                         }
6054                                         return (-13);
6055                                 }
6056                         }
6057                 } else if (ptype == SCTP_IPV6_ADDRESS) {
6058                         if (stcb->asoc.ipv6_addr_legal) {
6059                                 /* ok get the v6 address and check/add */
6060                                 struct sctp_ipv6addr_param *p6, p6_buf;
6061
6062                                 phdr = sctp_get_next_param(m, offset,
6063                                     (struct sctp_paramhdr *)&p6_buf,
6064                                     sizeof(p6_buf));
6065                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6066                                     phdr == NULL) {
6067                                         return (-14);
6068                                 }
6069                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6070                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6071                                     sizeof(p6->addr));
6072                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6073                                         /* Skip multi-cast addresses */
6074                                         goto next_param;
6075                                 }
6076                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6077                                         /*
6078                                          * Link local make no sense without
6079                                          * scope
6080                                          */
6081                                         goto next_param;
6082                                 }
6083                                 sa = (struct sockaddr *)&sin6;
6084                                 inp = stcb->sctp_ep;
6085                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6086                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6087                                     local_sa, stcb);
6088                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6089                                 if (stcb_tmp == NULL &&
6090                                     (inp == stcb->sctp_ep || inp == NULL)) {
6091                                         /*
6092                                          * we must validate the state again
6093                                          * here
6094                                          */
6095                         add_it_now6:
6096                                         if (stcb->asoc.state == 0) {
6097                                                 /* the assoc was freed? */
6098                                                 return (-16);
6099                                         }
6100                                         /*
6101                                          * we must add the address, no scope
6102                                          * set
6103                                          */
6104                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6105                                                 return (-17);
6106                                         }
6107                                 } else if (stcb_tmp == stcb) {
6108                                         /*
6109                                          * we must validate the state again
6110                                          * here
6111                                          */
6112                                         if (stcb->asoc.state == 0) {
6113                                                 /* the assoc was freed? */
6114                                                 return (-19);
6115                                         }
6116                                         if (net != NULL) {
6117                                                 /* clear flag */
6118                                                 net->dest_state &=
6119                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6120                                         }
6121                                 } else {
6122                                         /*
6123                                          * strange, address is in another
6124                                          * assoc? straighten out locks.
6125                                          */
6126                                         if (stcb_tmp)
6127                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6128                                                         /*
6129                                                          * in setup state we
6130                                                          * abort this guy
6131                                                          */
6132                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6133                                                             stcb_tmp, 1, NULL, 0);
6134                                                         goto add_it_now6;
6135                                                 }
6136                                         SCTP_TCB_UNLOCK(stcb_tmp);
6137
6138                                         if (stcb->asoc.state == 0) {
6139                                                 /* the assoc was freed? */
6140                                                 return (-21);
6141                                         }
6142                                         return (-22);
6143                                 }
6144                         }
6145                 } else if (ptype == SCTP_ECN_CAPABLE) {
6146                         stcb->asoc.ecn_allowed = 1;
6147                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6148                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6149                                 struct sctp_adaptation_layer_indication ai,
6150                                                                 *aip;
6151
6152                                 phdr = sctp_get_next_param(m, offset,
6153                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6154                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6155                                 if (aip) {
6156                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6157                                         stcb->asoc.adaptation_needed = 1;
6158                                 }
6159                         }
6160                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6161                         struct sctp_asconf_addr_param lstore, *fee;
6162                         struct sctp_asconf_addrv4_param *fii;
6163                         int lptype;
6164                         struct sockaddr *lsa = NULL;
6165
6166                         stcb->asoc.peer_supports_asconf = 1;
6167                         if (plen > sizeof(lstore)) {
6168                                 return (-23);
6169                         }
6170                         phdr = sctp_get_next_param(m, offset,
6171                             (struct sctp_paramhdr *)&lstore,
6172                             min(plen, sizeof(lstore)));
6173                         if (phdr == NULL) {
6174                                 return (-24);
6175                         }
6176                         fee = (struct sctp_asconf_addr_param *)phdr;
6177                         lptype = ntohs(fee->addrp.ph.param_type);
6178                         if (lptype == SCTP_IPV4_ADDRESS) {
6179                                 if (plen !=
6180                                     sizeof(struct sctp_asconf_addrv4_param)) {
6181                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6182                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6183                                             plen);
6184                                 } else {
6185                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6186                                         sin.sin_addr.s_addr = fii->addrp.addr;
6187                                         lsa = (struct sockaddr *)&sin;
6188                                 }
6189                         } else if (lptype == SCTP_IPV6_ADDRESS) {
6190                                 if (plen !=
6191                                     sizeof(struct sctp_asconf_addr_param)) {
6192                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6193                                             (int)sizeof(struct sctp_asconf_addr_param),
6194                                             plen);
6195                                 } else {
6196                                         memcpy(sin6.sin6_addr.s6_addr,
6197                                             fee->addrp.addr,
6198                                             sizeof(fee->addrp.addr));
6199                                         lsa = (struct sockaddr *)&sin6;
6200                                 }
6201                         }
6202                         if (lsa) {
6203                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6204                         }
6205                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6206                         stcb->asoc.peer_supports_nat = 1;
6207                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6208                         /* Peer supports pr-sctp */
6209                         stcb->asoc.peer_supports_prsctp = 1;
6210                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6211                         /* A supported extension chunk */
6212                         struct sctp_supported_chunk_types_param *pr_supported;
6213                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6214                         int num_ent, i;
6215
6216                         phdr = sctp_get_next_param(m, offset,
6217                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6218                         if (phdr == NULL) {
6219                                 return (-25);
6220                         }
6221                         stcb->asoc.peer_supports_asconf = 0;
6222                         stcb->asoc.peer_supports_prsctp = 0;
6223                         stcb->asoc.peer_supports_pktdrop = 0;
6224                         stcb->asoc.peer_supports_strreset = 0;
6225                         stcb->asoc.peer_supports_nr_sack = 0;
6226                         stcb->asoc.peer_supports_auth = 0;
6227                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6228                         num_ent = plen - sizeof(struct sctp_paramhdr);
6229                         for (i = 0; i < num_ent; i++) {
6230                                 switch (pr_supported->chunk_types[i]) {
6231                                 case SCTP_ASCONF:
6232                                 case SCTP_ASCONF_ACK:
6233                                         stcb->asoc.peer_supports_asconf = 1;
6234                                         break;
6235                                 case SCTP_FORWARD_CUM_TSN:
6236                                         stcb->asoc.peer_supports_prsctp = 1;
6237                                         break;
6238                                 case SCTP_PACKET_DROPPED:
6239                                         stcb->asoc.peer_supports_pktdrop = 1;
6240                                         break;
6241                                 case SCTP_NR_SELECTIVE_ACK:
6242                                         stcb->asoc.peer_supports_nr_sack = 1;
6243                                         break;
6244                                 case SCTP_STREAM_RESET:
6245                                         stcb->asoc.peer_supports_strreset = 1;
6246                                         break;
6247                                 case SCTP_AUTHENTICATION:
6248                                         stcb->asoc.peer_supports_auth = 1;
6249                                         break;
6250                                 default:
6251                                         /* one I have not learned yet */
6252                                         break;
6253
6254                                 }
6255                         }
6256                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6257                         /* Peer supports ECN-nonce */
6258                         stcb->asoc.peer_supports_ecn_nonce = 1;
6259                         stcb->asoc.ecn_nonce_allowed = 1;
6260                 } else if (ptype == SCTP_RANDOM) {
6261                         if (plen > sizeof(random_store))
6262                                 break;
6263                         if (got_random) {
6264                                 /* already processed a RANDOM */
6265                                 goto next_param;
6266                         }
6267                         phdr = sctp_get_next_param(m, offset,
6268                             (struct sctp_paramhdr *)random_store,
6269                             min(sizeof(random_store), plen));
6270                         if (phdr == NULL)
6271                                 return (-26);
6272                         p_random = (struct sctp_auth_random *)phdr;
6273                         random_len = plen - sizeof(*p_random);
6274                         /* enforce the random length */
6275                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6276                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6277                                 return (-27);
6278                         }
6279                         got_random = 1;
6280                 } else if (ptype == SCTP_HMAC_LIST) {
6281                         int num_hmacs;
6282                         int i;
6283
6284                         if (plen > sizeof(hmacs_store))
6285                                 break;
6286                         if (got_hmacs) {
6287                                 /* already processed a HMAC list */
6288                                 goto next_param;
6289                         }
6290                         phdr = sctp_get_next_param(m, offset,
6291                             (struct sctp_paramhdr *)hmacs_store,
6292                             min(plen, sizeof(hmacs_store)));
6293                         if (phdr == NULL)
6294                                 return (-28);
6295                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6296                         hmacs_len = plen - sizeof(*hmacs);
6297                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6298                         /* validate the hmac list */
6299                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6300                                 return (-29);
6301                         }
6302                         if (stcb->asoc.peer_hmacs != NULL)
6303                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6304                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6305                         if (stcb->asoc.peer_hmacs != NULL) {
6306                                 for (i = 0; i < num_hmacs; i++) {
6307                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6308                                             ntohs(hmacs->hmac_ids[i]));
6309                                 }
6310                         }
6311                         got_hmacs = 1;
6312                 } else if (ptype == SCTP_CHUNK_LIST) {
6313                         int i;
6314
6315                         if (plen > sizeof(chunks_store))
6316                                 break;
6317                         if (got_chklist) {
6318                                 /* already processed a Chunks list */
6319                                 goto next_param;
6320                         }
6321                         phdr = sctp_get_next_param(m, offset,
6322                             (struct sctp_paramhdr *)chunks_store,
6323                             min(plen, sizeof(chunks_store)));
6324                         if (phdr == NULL)
6325                                 return (-30);
6326                         chunks = (struct sctp_auth_chunk_list *)phdr;
6327                         num_chunks = plen - sizeof(*chunks);
6328                         if (stcb->asoc.peer_auth_chunks != NULL)
6329                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6330                         else
6331                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6332                         for (i = 0; i < num_chunks; i++) {
6333                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6334                                     stcb->asoc.peer_auth_chunks);
6335                                 /* record asconf/asconf-ack if listed */
6336                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6337                                         saw_asconf = 1;
6338                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6339                                         saw_asconf_ack = 1;
6340
6341                         }
6342                         got_chklist = 1;
6343                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6344                             (ptype == SCTP_STATE_COOKIE) ||
6345                             (ptype == SCTP_UNRECOG_PARAM) ||
6346                             (ptype == SCTP_COOKIE_PRESERVE) ||
6347                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6348                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6349                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6350                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6351                     (ptype == SCTP_SUCCESS_REPORT)) {
6352                          /* don't care */ ;
6353                 } else {
6354                         if ((ptype & 0x8000) == 0x0000) {
6355                                 /*
6356                                  * must stop processing the rest of the
6357                                  * param's. Any report bits were handled
6358                                  * with the call to
6359                                  * sctp_arethere_unrecognized_parameters()
6360                                  * when the INIT or INIT-ACK was first seen.
6361                                  */
6362                                 break;
6363                         }
6364                 }
6365
6366 next_param:
6367                 offset += SCTP_SIZE32(plen);
6368                 if (offset >= limit) {
6369                         break;
6370                 }
6371                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6372                     sizeof(parm_buf));
6373         }
6374         /* Now check to see if we need to purge any addresses */
6375         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6376                 net_tmp = TAILQ_NEXT(net, sctp_next);
6377                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6378                     SCTP_ADDR_NOT_IN_ASSOC) {
6379                         /* This address has been removed from the asoc */
6380                         /* remove and free it */
6381                         stcb->asoc.numnets--;
6382                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6383                         sctp_free_remote_addr(net);
6384                         if (net == stcb->asoc.primary_destination) {
6385                                 stcb->asoc.primary_destination = NULL;
6386                                 sctp_select_primary_destination(stcb);
6387                         }
6388                 }
6389         }
6390         /* validate authentication required parameters */
6391         if (got_random && got_hmacs) {
6392                 stcb->asoc.peer_supports_auth = 1;
6393         } else {
6394                 stcb->asoc.peer_supports_auth = 0;
6395         }
6396         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6397                 /* peer does not support auth but sent a chunks list? */
6398                 return (-31);
6399         }
6400         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6401             !stcb->asoc.peer_supports_auth) {
6402                 /* peer supports asconf but not auth? */
6403                 return (-32);
6404         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6405             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6406                 return (-33);
6407         }
6408         /* concatenate the full random key */
6409         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6410         if (chunks != NULL) {
6411                 keylen += sizeof(*chunks) + num_chunks;
6412         }
6413         new_key = sctp_alloc_key(keylen);
6414         if (new_key != NULL) {
6415                 /* copy in the RANDOM */
6416                 if (p_random != NULL) {
6417                         keylen = sizeof(*p_random) + random_len;
6418                         bcopy(p_random, new_key->key, keylen);
6419                 }
6420                 /* append in the AUTH chunks */
6421                 if (chunks != NULL) {
6422                         bcopy(chunks, new_key->key + keylen,
6423                             sizeof(*chunks) + num_chunks);
6424                         keylen += sizeof(*chunks) + num_chunks;
6425                 }
6426                 /* append in the HMACs */
6427                 if (hmacs != NULL) {
6428                         bcopy(hmacs, new_key->key + keylen,
6429                             sizeof(*hmacs) + hmacs_len);
6430                 }
6431         } else {
6432                 /* failed to get memory for the key */
6433                 return (-34);
6434         }
6435         if (stcb->asoc.authinfo.peer_random != NULL)
6436                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6437         stcb->asoc.authinfo.peer_random = new_key;
6438         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6439         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6440
6441         return (0);
6442 }
6443
6444 int
6445 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6446     struct sctp_nets *net)
6447 {
6448         /* make sure the requested primary address exists in the assoc */
6449         if (net == NULL && sa)
6450                 net = sctp_findnet(stcb, sa);
6451
6452         if (net == NULL) {
6453                 /* didn't find the requested primary address! */
6454                 return (-1);
6455         } else {
6456                 /* set the primary address */
6457                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6458                         /* Must be confirmed, so queue to set */
6459                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6460                         return (0);
6461                 }
6462                 stcb->asoc.primary_destination = net;
6463                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6464                 net = TAILQ_FIRST(&stcb->asoc.nets);
6465                 if (net != stcb->asoc.primary_destination) {
6466                         /*
6467                          * first one on the list is NOT the primary
6468                          * sctp_cmpaddr() is much more efficient if the
6469                          * primary is the first on the list, make it so.
6470                          */
6471                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6472                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6473                 }
6474                 return (0);
6475         }
6476 }
6477
6478 int
6479 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6480 {
6481         /*
6482          * This function serves two purposes. It will see if a TAG can be
6483          * re-used and return 1 for yes it is ok and 0 for don't use that
6484          * tag. A secondary function it will do is purge out old tags that
6485          * can be removed.
6486          */
6487         struct sctpvtaghead *chain;
6488         struct sctp_tagblock *twait_block;
6489         struct sctpasochead *head;
6490         struct sctp_tcb *stcb;
6491         int i;
6492
6493         SCTP_INP_INFO_RLOCK();
6494         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6495             SCTP_BASE_INFO(hashasocmark))];
6496         if (head == NULL) {
6497                 /* invalid vtag */
6498                 goto skip_vtag_check;
6499         }
6500         LIST_FOREACH(stcb, head, sctp_asocs) {
6501                 /*
6502                  * We choose not to lock anything here. TCB's can't be
6503                  * removed since we have the read lock, so they can't be
6504                  * freed on us, same thing for the INP. I may be wrong with
6505                  * this assumption, but we will go with it for now :-)
6506                  */
6507                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6508                         continue;
6509                 }
6510                 if (stcb->asoc.my_vtag == tag) {
6511                         /* candidate */
6512                         if (stcb->rport != rport) {
6513                                 continue;
6514                         }
6515                         if (stcb->sctp_ep->sctp_lport != lport) {
6516                                 continue;
6517                         }
6518                         /* Its a used tag set */
6519                         SCTP_INP_INFO_RUNLOCK();
6520                         return (0);
6521                 }
6522         }
6523 skip_vtag_check:
6524
6525         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6526         /* Now what about timed wait ? */
6527         if (!LIST_EMPTY(chain)) {
6528                 /*
6529                  * Block(s) are present, lets see if we have this tag in the
6530                  * list
6531                  */
6532                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6533                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6534                                 if (twait_block->vtag_block[i].v_tag == 0) {
6535                                         /* not used */
6536                                         continue;
6537                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6538                                     now->tv_sec) {
6539                                         /* Audit expires this guy */
6540                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6541                                         twait_block->vtag_block[i].v_tag = 0;
6542                                         twait_block->vtag_block[i].lport = 0;
6543                                         twait_block->vtag_block[i].rport = 0;
6544                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6545                                             (twait_block->vtag_block[i].lport == lport) &&
6546                                     (twait_block->vtag_block[i].rport == rport)) {
6547                                         /* Bad tag, sorry :< */
6548                                         SCTP_INP_INFO_RUNLOCK();
6549                                         return (0);
6550                                 }
6551                         }
6552                 }
6553         }
6554         SCTP_INP_INFO_RUNLOCK();
6555         return (1);
6556 }
6557
6558
6559 static sctp_assoc_t reneged_asoc_ids[256];
6560 static uint8_t reneged_at = 0;
6561
6562
6563 static void
6564 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6565 {
6566         /*
6567          * We must hunt this association for MBUF's past the cumack (i.e.
6568          * out of order data that we can renege on).
6569          */
6570         struct sctp_association *asoc;
6571         struct sctp_tmit_chunk *chk, *nchk;
6572         uint32_t cumulative_tsn_p1;
6573         struct sctp_queued_to_read *ctl, *nctl;
6574         int cnt, strmat;
6575         uint32_t gap, i;
6576         int fnd = 0;
6577
6578         /* We look for anything larger than the cum-ack + 1 */
6579
6580         asoc = &stcb->asoc;
6581         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6582                 /* none we can reneg on. */
6583                 return;
6584         }
6585         SCTP_STAT_INCR(sctps_protocol_drains_done);
6586         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6587         cnt = 0;
6588         /* First look in the re-assembly queue */
6589         chk = TAILQ_FIRST(&asoc->reasmqueue);
6590         while (chk) {
6591                 /* Get the next one */
6592                 nchk = TAILQ_NEXT(chk, sctp_next);
6593                 if (compare_with_wrap(chk->rec.data.TSN_seq,
6594                     cumulative_tsn_p1, MAX_TSN)) {
6595                         /* Yep it is above cum-ack */
6596                         cnt++;
6597                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6598                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6599                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6600                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6601                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6602                         if (chk->data) {
6603                                 sctp_m_freem(chk->data);
6604                                 chk->data = NULL;
6605                         }
6606                         sctp_free_a_chunk(stcb, chk);
6607                 }
6608                 chk = nchk;
6609         }
6610         /* Ok that was fun, now we will drain all the inbound streams? */
6611         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6612                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6613                 while (ctl) {
6614                         nctl = TAILQ_NEXT(ctl, next);
6615                         if (compare_with_wrap(ctl->sinfo_tsn,
6616                             cumulative_tsn_p1, MAX_TSN)) {
6617                                 /* Yep it is above cum-ack */
6618                                 cnt++;
6619                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6620                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6621                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6622                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6623                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6624                                 if (ctl->data) {
6625                                         sctp_m_freem(ctl->data);
6626                                         ctl->data = NULL;
6627                                 }
6628                                 sctp_free_remote_addr(ctl->whoFrom);
6629                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6630                                 SCTP_DECR_READQ_COUNT();
6631                         }
6632                         ctl = nctl;
6633                 }
6634         }
6635         if (cnt) {
6636                 /* We must back down to see what the new highest is */
6637                 for (i = asoc->highest_tsn_inside_map;
6638                     (compare_with_wrap(i, asoc->mapping_array_base_tsn, MAX_TSN) || (i == asoc->mapping_array_base_tsn));
6639                     i--) {
6640                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6641                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6642                                 asoc->highest_tsn_inside_map = i;
6643                                 fnd = 1;
6644                                 break;
6645                         }
6646                 }
6647                 if (!fnd) {
6648                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6649                 }
6650                 /*
6651                  * Question, should we go through the delivery queue? The
6652                  * only reason things are on here is the app not reading OR
6653                  * a p-d-api up. An attacker COULD send enough in to
6654                  * initiate the PD-API and then send a bunch of stuff to
6655                  * other streams... these would wind up on the delivery
6656                  * queue.. and then we would not get to them. But in order
6657                  * to do this I then have to back-track and un-deliver
6658                  * sequence numbers in streams.. el-yucko. I think for now
6659                  * we will NOT look at the delivery queue and leave it to be
6660                  * something to consider later. An alternative would be to
6661                  * abort the P-D-API with a notification and then deliver
6662                  * the data.... Or another method might be to keep track of
6663                  * how many times the situation occurs and if we see a
6664                  * possible attack underway just abort the association.
6665                  */
6666 #ifdef SCTP_DEBUG
6667                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6668 #endif
6669                 /*
6670                  * Now do we need to find a new
6671                  * asoc->highest_tsn_inside_map?
6672                  */
6673                 asoc->last_revoke_count = cnt;
6674                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6675                 /* sa_ignore NO_NULL_CHK */
6676                 sctp_send_sack(stcb);
6677                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6678                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6679                 reneged_at++;
6680         }
6681         /*
6682          * Another issue, in un-setting the TSN's in the mapping array we
6683          * DID NOT adjust the highest_tsn marker.  This will cause one of
6684          * two things to occur. It may cause us to do extra work in checking
6685          * for our mapping array movement. More importantly it may cause us
6686          * to SACK every datagram. This may not be a bad thing though since
6687          * we will recover once we get our cum-ack above and all this stuff
6688          * we dumped recovered.
6689          */
6690 }
6691
6692 void
6693 sctp_drain()
6694 {
6695         /*
6696          * We must walk the PCB lists for ALL associations here. The system
6697          * is LOW on MBUF's and needs help. This is where reneging will
6698          * occur. We really hope this does NOT happen!
6699          */
6700         VNET_ITERATOR_DECL(vnet_iter);
6701         VNET_LIST_RLOCK_NOSLEEP();
6702         VNET_FOREACH(vnet_iter) {
6703                 CURVNET_SET(vnet_iter);
6704                 struct sctp_inpcb *inp;
6705                 struct sctp_tcb *stcb;
6706
6707                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6708                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6709 #ifdef VIMAGE
6710                         continue;
6711 #else
6712                         return;
6713 #endif
6714                 }
6715                 SCTP_INP_INFO_RLOCK();
6716                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6717                         /* For each endpoint */
6718                         SCTP_INP_RLOCK(inp);
6719                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6720                                 /* For each association */
6721                                 SCTP_TCB_LOCK(stcb);
6722                                 sctp_drain_mbufs(inp, stcb);
6723                                 SCTP_TCB_UNLOCK(stcb);
6724                         }
6725                         SCTP_INP_RUNLOCK(inp);
6726                 }
6727                 SCTP_INP_INFO_RUNLOCK();
6728                 CURVNET_RESTORE();
6729         }
6730         VNET_LIST_RUNLOCK_NOSLEEP();
6731 }
6732
6733 /*
6734  * start a new iterator
6735  * iterates through all endpoints and associations based on the pcb_state
6736  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6737  * assocs and "ef" (optional) is executed when the iterator completes.
6738  * "inpf" (optional) is executed for each new endpoint as it is being
6739  * iterated through. inpe (optional) is called when the inp completes
6740  * its way through all the stcbs.
6741  */
6742 int
6743 sctp_initiate_iterator(inp_func inpf,
6744     asoc_func af,
6745     inp_func inpe,
6746     uint32_t pcb_state,
6747     uint32_t pcb_features,
6748     uint32_t asoc_state,
6749     void *argp,
6750     uint32_t argi,
6751     end_func ef,
6752     struct sctp_inpcb *s_inp,
6753     uint8_t chunk_output_off)
6754 {
6755         struct sctp_iterator *it = NULL;
6756
6757         if (af == NULL) {
6758                 return (-1);
6759         }
6760         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6761             SCTP_M_ITER);
6762         if (it == NULL) {
6763                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6764                 return (ENOMEM);
6765         }
6766         memset(it, 0, sizeof(*it));
6767         it->function_assoc = af;
6768         it->function_inp = inpf;
6769         if (inpf)
6770                 it->done_current_ep = 0;
6771         else
6772                 it->done_current_ep = 1;
6773         it->function_atend = ef;
6774         it->pointer = argp;
6775         it->val = argi;
6776         it->pcb_flags = pcb_state;
6777         it->pcb_features = pcb_features;
6778         it->asoc_state = asoc_state;
6779         it->function_inp_end = inpe;
6780         it->no_chunk_output = chunk_output_off;
6781         it->vn = curvnet;
6782         if (s_inp) {
6783                 /* Assume lock is held here */
6784                 it->inp = s_inp;
6785                 SCTP_INP_INCR_REF(it->inp);
6786                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6787         } else {
6788                 SCTP_INP_INFO_RLOCK();
6789                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6790                 if (it->inp) {
6791                         SCTP_INP_INCR_REF(it->inp);
6792                 }
6793                 SCTP_INP_INFO_RUNLOCK();
6794                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6795
6796         }
6797         SCTP_IPI_ITERATOR_WQ_LOCK();
6798
6799         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6800         if (sctp_it_ctl.iterator_running == 0) {
6801                 sctp_wakeup_iterator();
6802         }
6803         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6804         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6805         return (0);
6806 }