sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * a) Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  *
  10  * b) Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *   the documentation and/or other materials provided with the distribution.
  13  *
  14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  28  * THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/udp.h>
  49
  50
  51 VNET_DEFINE(struct sctp_base_info, system_base_info);
  52
  53 /* FIX: we don't handle multiple link local scopes */
  54 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  55 #ifdef INET6
  56 int
  57 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  58 {
  59         struct sockaddr_in6 tmp_a, tmp_b;
  60
  61         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  62         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  63                 return 0;
  64         }
  65         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  66         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  67                 return 0;
  68         }
  69         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  70 }
  71
  72 #endif
  73
  74 void
  75 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  76 {
  77         /*
  78          * We really don't need to lock this, but I will just because it
  79          * does not hurt.
  80          */
  81         SCTP_INP_INFO_RLOCK();
  82         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  83         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  84         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  85         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  86         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  87         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  88         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  89         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  90
  91         SCTP_INP_INFO_RUNLOCK();
  92 }
  93
  94 /*
  95  * Addresses are added to VRF's (Virtual Router's). For BSD we
  96  * have only the default VRF 0. We maintain a hash list of
  97  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
  98  * these has a list of addresses. When we add a new address
  99  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 100  * not exist we create it and add it to the list of IFN's
 101  * within the VRF. Once we have the sctp_ifn, we add the
 102  * address to the list. So we look something like:
 103  *
 104  * hash-vrf-table
 105  *   vrf-> ifn-> ifn -> ifn
 106  *   vrf    |
 107  *    ...   +--ifa-> ifa -> ifa
 108  *   vrf
 109  *
 110  * We keep these seperate lists since the SCTP subsystem will
 111  * point to these from its source address selection nets structure.
 112  * When an address is deleted it does not happen right away on
 113  * the SCTP side, it gets scheduled. What we do when a
 114  * delete happens is immediately remove the address from
 115  * the master list and decrement the refcount. As our
 116  * addip iterator works through and frees the src address
 117  * selection pointing to the sctp_ifa, eventually the refcount
 118  * will reach 0 and we will delete it. Note that it is assumed
 119  * that any locking on system level ifn/ifa is done at the
 120  * caller of these functions and these routines will only
 121  * lock the SCTP structures as they add or delete things.
 122  *
 123  * Other notes on VRF concepts.
 124  *  - An endpoint can be in multiple VRF's
 125  *  - An association lives within a VRF and only one VRF.
 126  *  - Any incoming packet we can deduce the VRF for by
 127  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 128  *  - Any downward send call or connect call must supply the
 129  *    VRF via ancillary data or via some sort of set default
 130  *    VRF socket option call (again for BSD no brainer since
 131  *    the VRF is always 0).
 132  *  - An endpoint may add multiple VRF's to it.
 133  *  - Listening sockets can accept associations in any
 134  *    of the VRF's they are in but the assoc will end up
 135  *    in only one VRF (gotten from the packet or connect/send).
 136  *
 137  */
 138
 139 struct sctp_vrf *
 140 sctp_allocate_vrf(int vrf_id)
 141 {
 142         struct sctp_vrf *vrf = NULL;
 143         struct sctp_vrflist *bucket;
 144
 145         /* First allocate the VRF structure */
 146         vrf = sctp_find_vrf(vrf_id);
 147         if (vrf) {
 148                 /* Already allocated */
 149                 return (vrf);
 150         }
 151         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 152             SCTP_M_VRF);
 153         if (vrf == NULL) {
 154                 /* No memory */
 155 #ifdef INVARIANTS
 156                 panic("No memory for VRF:%d", vrf_id);
 157 #endif
 158                 return (NULL);
 159         }
 160         /* setup the VRF */
 161         memset(vrf, 0, sizeof(struct sctp_vrf));
 162         vrf->vrf_id = vrf_id;
 163         LIST_INIT(&vrf->ifnlist);
 164         vrf->total_ifa_count = 0;
 165         vrf->refcount = 0;
 166         /* now also setup table ids */
 167         SCTP_INIT_VRF_TABLEID(vrf);
 168         /* Init the HASH of addresses */
 169         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 170             &vrf->vrf_addr_hashmark);
 171         if (vrf->vrf_addr_hash == NULL) {
 172                 /* No memory */
 173 #ifdef INVARIANTS
 174                 panic("No memory for VRF:%d", vrf_id);
 175 #endif
 176                 SCTP_FREE(vrf, SCTP_M_VRF);
 177                 return (NULL);
 178         }
 179         /* Add it to the hash table */
 180         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 181         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 182         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 183         return (vrf);
 184 }
 185
 186
 187 struct sctp_ifn *
 188 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 189 {
 190         struct sctp_ifn *sctp_ifnp;
 191         struct sctp_ifnlist *hash_ifn_head;
 192
 193         /*
 194          * We assume the lock is held for the addresses if thats wrong
 195          * problems could occur :-)
 196          */
 197         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 198         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 199                 if (sctp_ifnp->ifn_index == ifn_index) {
 200                         return (sctp_ifnp);
 201                 }
 202                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 203                         return (sctp_ifnp);
 204                 }
 205         }
 206         return (NULL);
 207 }
 208
 209
 210
 211 struct sctp_vrf *
 212 sctp_find_vrf(uint32_t vrf_id)
 213 {
 214         struct sctp_vrflist *bucket;
 215         struct sctp_vrf *liste;
 216
 217         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 218         LIST_FOREACH(liste, bucket, next_vrf) {
 219                 if (vrf_id == liste->vrf_id) {
 220                         return (liste);
 221                 }
 222         }
 223         return (NULL);
 224 }
 225
 226 void
 227 sctp_free_vrf(struct sctp_vrf *vrf)
 228 {
 229         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 230                 if (vrf->vrf_addr_hash) {
 231                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 232                         vrf->vrf_addr_hash = NULL;
 233                 }
 234                 /* We zero'd the count */
 235                 LIST_REMOVE(vrf, next_vrf);
 236                 SCTP_FREE(vrf, SCTP_M_VRF);
 237                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 238         }
 239 }
 240
 241 void
 242 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 243 {
 244         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 245                 /* We zero'd the count */
 246                 if (sctp_ifnp->vrf) {
 247                         sctp_free_vrf(sctp_ifnp->vrf);
 248                 }
 249                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 250                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 251         }
 252 }
 253
 254 void
 255 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 256 {
 257         struct sctp_ifn *sctp_ifnp;
 258
 259         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 260         if (sctp_ifnp != NULL) {
 261                 sctp_ifnp->ifn_mtu = mtu;
 262         }
 263 }
 264
 265
 266 void
 267 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 268 {
 269         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 270                 /* We zero'd the count */
 271                 if (sctp_ifap->ifn_p) {
 272                         sctp_free_ifn(sctp_ifap->ifn_p);
 273                 }
 274                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 275                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 276         }
 277 }
 278
 279 static void
 280 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 281 {
 282         struct sctp_ifn *found;
 283
 284         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 285         if (found == NULL) {
 286                 /* Not in the list.. sorry */
 287                 return;
 288         }
 289         if (hold_addr_lock == 0)
 290                 SCTP_IPI_ADDR_WLOCK();
 291         LIST_REMOVE(sctp_ifnp, next_bucket);
 292         LIST_REMOVE(sctp_ifnp, next_ifn);
 293         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 294             sctp_ifnp->registered_af);
 295         if (hold_addr_lock == 0)
 296                 SCTP_IPI_ADDR_WUNLOCK();
 297         /* Take away the reference, and possibly free it */
 298         sctp_free_ifn(sctp_ifnp);
 299 }
 300
 301 void
 302 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 303     const char *if_name, uint32_t ifn_index)
 304 {
 305         struct sctp_vrf *vrf;
 306         struct sctp_ifa *sctp_ifap = NULL;
 307
 308         SCTP_IPI_ADDR_RLOCK();
 309         vrf = sctp_find_vrf(vrf_id);
 310         if (vrf == NULL) {
 311                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 312                 goto out;
 313
 314         }
 315         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 316         if (sctp_ifap == NULL) {
 317                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 318                 goto out;
 319         }
 320         if (sctp_ifap->ifn_p == NULL) {
 321                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 322                 goto out;
 323         }
 324         if (if_name) {
 325                 int len1, len2;
 326
 327                 len1 = strlen(if_name);
 328                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 329                 if (len1 != len2) {
 330                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 331                             len1, len2);
 332                         goto out;
 333                 }
 334                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 335                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 336                             sctp_ifap->ifn_p->ifn_name,
 337                             if_name);
 338                         goto out;
 339                 }
 340         } else {
 341                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 342                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 343                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 344                         goto out;
 345                 }
 346         }
 347
 348         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 349         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 350 out:
 351         SCTP_IPI_ADDR_RUNLOCK();
 352 }
 353
 354 void
 355 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 356     const char *if_name, uint32_t ifn_index)
 357 {
 358         struct sctp_vrf *vrf;
 359         struct sctp_ifa *sctp_ifap = NULL;
 360
 361         SCTP_IPI_ADDR_RLOCK();
 362         vrf = sctp_find_vrf(vrf_id);
 363         if (vrf == NULL) {
 364                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 365                 goto out;
 366
 367         }
 368         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 369         if (sctp_ifap == NULL) {
 370                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 371                 goto out;
 372         }
 373         if (sctp_ifap->ifn_p == NULL) {
 374                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 375                 goto out;
 376         }
 377         if (if_name) {
 378                 int len1, len2;
 379
 380                 len1 = strlen(if_name);
 381                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 382                 if (len1 != len2) {
 383                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
 384                             len1, len2);
 385                         goto out;
 386                 }
 387                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 389                             sctp_ifap->ifn_p->ifn_name,
 390                             if_name);
 391                         goto out;
 392                 }
 393         } else {
 394                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 395                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 396                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 397                         goto out;
 398                 }
 399         }
 400
 401         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 402         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 403 out:
 404         SCTP_IPI_ADDR_RUNLOCK();
 405 }
 406
 407 /*-
 408  * Add an ifa to an ifn.
 409  * Register the interface as necessary.
 410  * NOTE: ADDR write lock MUST be held.
 411  */
 412 static void
 413 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 414 {
 415         int ifa_af;
 416
 417         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 418         sctp_ifap->ifn_p = sctp_ifnp;
 419         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 420         /* update address counts */
 421         sctp_ifnp->ifa_count++;
 422         ifa_af = sctp_ifap->address.sa.sa_family;
 423         if (ifa_af == AF_INET)
 424                 sctp_ifnp->num_v4++;
 425         else
 426                 sctp_ifnp->num_v6++;
 427         if (sctp_ifnp->ifa_count == 1) {
 428                 /* register the new interface */
 429                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 430                 sctp_ifnp->registered_af = ifa_af;
 431         }
 432 }
 433
 434 /*-
 435  * Remove an ifa from its ifn.
 436  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 437  * the interface based on the remaining address families left.
 438  * NOTE: ADDR write lock MUST be held.
 439  */
 440 static void
 441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 442 {
 443         uint32_t ifn_index;
 444
 445         LIST_REMOVE(sctp_ifap, next_ifa);
 446         if (sctp_ifap->ifn_p) {
 447                 /* update address counts */
 448                 sctp_ifap->ifn_p->ifa_count--;
 449                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 450                         sctp_ifap->ifn_p->num_v6--;
 451                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 452                         sctp_ifap->ifn_p->num_v4--;
 453
 454                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 455                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 456                         /* remove the ifn, possibly freeing it */
 457                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 458                 } else {
 459                         /* re-register address family type, if needed */
 460                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 461                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 462                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 463                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 464                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 465                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 466                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 467                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 468                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 469                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 470                         }
 471                         /* free the ifn refcount */
 472                         sctp_free_ifn(sctp_ifap->ifn_p);
 473                 }
 474                 sctp_ifap->ifn_p = NULL;
 475         }
 476 }
 477
 478 struct sctp_ifa *
 479 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 480     uint32_t ifn_type, const char *if_name, void *ifa,
 481     struct sockaddr *addr, uint32_t ifa_flags,
 482     int dynamic_add)
 483 {
 484         struct sctp_vrf *vrf;
 485         struct sctp_ifn *sctp_ifnp = NULL;
 486         struct sctp_ifa *sctp_ifap = NULL;
 487         struct sctp_ifalist *hash_addr_head;
 488         struct sctp_ifnlist *hash_ifn_head;
 489         uint32_t hash_of_addr;
 490         int new_ifn_af = 0;
 491
 492 #ifdef SCTP_DEBUG
 493         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 494         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 495 #endif
 496         SCTP_IPI_ADDR_WLOCK();
 497         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 498         if (sctp_ifnp) {
 499                 vrf = sctp_ifnp->vrf;
 500         } else {
 501                 vrf = sctp_find_vrf(vrf_id);
 502                 if (vrf == NULL) {
 503                         vrf = sctp_allocate_vrf(vrf_id);
 504                         if (vrf == NULL) {
 505                                 SCTP_IPI_ADDR_WUNLOCK();
 506                                 return (NULL);
 507                         }
 508                 }
 509         }
 510         if (sctp_ifnp == NULL) {
 511                 /*
 512                  * build one and add it, can't hold lock until after malloc
 513                  * done though.
 514                  */
 515                 SCTP_IPI_ADDR_WUNLOCK();
 516                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 517                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 518                 if (sctp_ifnp == NULL) {
 519 #ifdef INVARIANTS
 520                         panic("No memory for IFN");
 521 #endif
 522                         return (NULL);
 523                 }
 524                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 525                 sctp_ifnp->ifn_index = ifn_index;
 526                 sctp_ifnp->ifn_p = ifn;
 527                 sctp_ifnp->ifn_type = ifn_type;
 528                 sctp_ifnp->refcount = 0;
 529                 sctp_ifnp->vrf = vrf;
 530                 atomic_add_int(&vrf->refcount, 1);
 531                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 532                 if (if_name != NULL) {
 533                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 534                 } else {
 535                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 536                 }
 537                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 538                 LIST_INIT(&sctp_ifnp->ifalist);
 539                 SCTP_IPI_ADDR_WLOCK();
 540                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 541                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 542                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 543                 new_ifn_af = 1;
 544         }
 545         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 546         if (sctp_ifap) {
 547                 /* Hmm, it already exists? */
 548                 if ((sctp_ifap->ifn_p) &&
 549                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 550                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 551                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 552                             sctp_ifap);
 553                         if (new_ifn_af) {
 554                                 /* Remove the created one that we don't want */
 555                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 556                         }
 557                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 558                                 /* easy to solve, just switch back to active */
 559                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 560                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 561                                 sctp_ifap->ifn_p = sctp_ifnp;
 562                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 563                         }
 564         exit_stage_left:
 565                         SCTP_IPI_ADDR_WUNLOCK();
 566                         return (sctp_ifap);
 567                 } else {
 568                         if (sctp_ifap->ifn_p) {
 569                                 /*
 570                                  * The last IFN gets the address, removee
 571                                  * the old one
 572                                  */
 573                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 574                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 575                                     sctp_ifap->ifn_p->ifn_index, if_name,
 576                                     ifn_index);
 577                                 /* remove the address from the old ifn */
 578                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 579                                 /* move the address over to the new ifn */
 580                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 581                                 goto exit_stage_left;
 582                         } else {
 583                                 /* repair ifnp which was NULL ? */
 584                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 586                                     sctp_ifnp, sctp_ifap);
 587                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 588                         }
 589                         goto exit_stage_left;
 590                 }
 591         }
 592         SCTP_IPI_ADDR_WUNLOCK();
 593         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 594         if (sctp_ifap == NULL) {
 595 #ifdef INVARIANTS
 596                 panic("No memory for IFA");
 597 #endif
 598                 return (NULL);
 599         }
 600         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 601         sctp_ifap->ifn_p = sctp_ifnp;
 602         atomic_add_int(&sctp_ifnp->refcount, 1);
 603         sctp_ifap->vrf_id = vrf_id;
 604         sctp_ifap->ifa = ifa;
 605         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 606         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 607         sctp_ifap->flags = ifa_flags;
 608         /* Set scope */
 609         switch (sctp_ifap->address.sa.sa_family) {
 610         case AF_INET:
 611                 {
 612                         struct sockaddr_in *sin;
 613
 614                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 615                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 616                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 617                                 sctp_ifap->src_is_loop = 1;
 618                         }
 619                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 620                                 sctp_ifap->src_is_priv = 1;
 621                         }
 622                         sctp_ifnp->num_v4++;
 623                         if (new_ifn_af)
 624                                 new_ifn_af = AF_INET;
 625                         break;
 626                 }
 627 #ifdef INET6
 628         case AF_INET6:
 629                 {
 630                         /* ok to use deprecated addresses? */
 631                         struct sockaddr_in6 *sin6;
 632
 633                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 634                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 635                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 636                                 sctp_ifap->src_is_loop = 1;
 637                         }
 638                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 639                                 sctp_ifap->src_is_priv = 1;
 640                         }
 641                         sctp_ifnp->num_v6++;
 642                         if (new_ifn_af)
 643                                 new_ifn_af = AF_INET6;
 644                         break;
 645                 }
 646 #endif
 647         default:
 648                 new_ifn_af = 0;
 649                 break;
 650         }
 651         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 652
 653         if ((sctp_ifap->src_is_priv == 0) &&
 654             (sctp_ifap->src_is_loop == 0)) {
 655                 sctp_ifap->src_is_glob = 1;
 656         }
 657         SCTP_IPI_ADDR_WLOCK();
 658         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 659         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 660         sctp_ifap->refcount = 1;
 661         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 662         sctp_ifnp->ifa_count++;
 663         vrf->total_ifa_count++;
 664         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 665         if (new_ifn_af) {
 666                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 667                 sctp_ifnp->registered_af = new_ifn_af;
 668         }
 669         SCTP_IPI_ADDR_WUNLOCK();
 670         if (dynamic_add) {
 671                 /*
 672                  * Bump up the refcount so that when the timer completes it
 673                  * will drop back down.
 674                  */
 675                 struct sctp_laddr *wi;
 676
 677                 atomic_add_int(&sctp_ifap->refcount, 1);
 678                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 679                 if (wi == NULL) {
 680                         /*
 681                          * Gak, what can we do? We have lost an address
 682                          * change can you say HOSED?
 683                          */
 684                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 685                         /* Opps, must decrement the count */
 686                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 687                             if_name);
 688                         return (NULL);
 689                 }
 690                 SCTP_INCR_LADDR_COUNT();
 691                 bzero(wi, sizeof(*wi));
 692                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 693                 wi->ifa = sctp_ifap;
 694                 wi->action = SCTP_ADD_IP_ADDRESS;
 695
 696                 SCTP_WQ_ADDR_LOCK();
 697                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 698                 SCTP_WQ_ADDR_UNLOCK();
 699
 700                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 701                     (struct sctp_inpcb *)NULL,
 702                     (struct sctp_tcb *)NULL,
 703                     (struct sctp_nets *)NULL);
 704         } else {
 705                 /* it's ready for use */
 706                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 707         }
 708         return (sctp_ifap);
 709 }
 710
 711 void
 712 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 713     uint32_t ifn_index, const char *if_name)
 714 {
 715         struct sctp_vrf *vrf;
 716         struct sctp_ifa *sctp_ifap = NULL;
 717
 718         SCTP_IPI_ADDR_WLOCK();
 719         vrf = sctp_find_vrf(vrf_id);
 720         if (vrf == NULL) {
 721                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 722                 goto out_now;
 723         }
 724 #ifdef SCTP_DEBUG
 725         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 726         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 727 #endif
 728         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 729         if (sctp_ifap) {
 730                 /* Validate the delete */
 731                 if (sctp_ifap->ifn_p) {
 732                         int valid = 0;
 733
 734                         /*-
 735                          * The name has priority over the ifn_index
 736                          * if its given. We do this especially for
 737                          * panda who might recycle indexes fast.
 738                          */
 739                         if (if_name) {
 740                                 int len1, len2;
 741
 742                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 743                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 744                                 if (len1 && len2 && (len1 == len2)) {
 745                                         /* we can compare them */
 746                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 747                                                 /*
 748                                                  * They match its a correct
 749                                                  * delete
 750                                                  */
 751                                                 valid = 1;
 752                                         }
 753                                 }
 754                         }
 755                         if (!valid) {
 756                                 /* last ditch check ifn_index */
 757                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 758                                         valid = 1;
 759                                 }
 760                         }
 761                         if (!valid) {
 762                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 763                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 764                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 765                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 766                                 SCTP_IPI_ADDR_WUNLOCK();
 767                                 return;
 768                         }
 769                 }
 770                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 771                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 772                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 773                 vrf->total_ifa_count--;
 774                 LIST_REMOVE(sctp_ifap, next_bucket);
 775                 sctp_remove_ifa_from_ifn(sctp_ifap);
 776         }
 777 #ifdef SCTP_DEBUG
 778         else {
 779                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 780                     ifn_index);
 781                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 782         }
 783 #endif
 784
 785 out_now:
 786         SCTP_IPI_ADDR_WUNLOCK();
 787         if (sctp_ifap) {
 788                 struct sctp_laddr *wi;
 789
 790                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 791                 if (wi == NULL) {
 792                         /*
 793                          * Gak, what can we do? We have lost an address
 794                          * change can you say HOSED?
 795                          */
 796                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 797
 798                         /* Oops, must decrement the count */
 799                         sctp_free_ifa(sctp_ifap);
 800                         return;
 801                 }
 802                 SCTP_INCR_LADDR_COUNT();
 803                 bzero(wi, sizeof(*wi));
 804                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 805                 wi->ifa = sctp_ifap;
 806                 wi->action = SCTP_DEL_IP_ADDRESS;
 807                 SCTP_WQ_ADDR_LOCK();
 808                 /*
 809                  * Should this really be a tailq? As it is we will process
 810                  * the newest first :-0
 811                  */
 812                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 813                 SCTP_WQ_ADDR_UNLOCK();
 814
 815                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 816                     (struct sctp_inpcb *)NULL,
 817                     (struct sctp_tcb *)NULL,
 818                     (struct sctp_nets *)NULL);
 819         }
 820         return;
 821 }
 822
 823
 824 static struct sctp_tcb *
 825 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 826     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 827 {
 828         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 829         /*
 830          * If we support the TCP model, then we must now dig through to see
 831          * if we can find our endpoint in the list of tcp ep's.
 832          */
 833         uint16_t lport, rport;
 834         struct sctppcbhead *ephead;
 835         struct sctp_inpcb *inp;
 836         struct sctp_laddr *laddr;
 837         struct sctp_tcb *stcb;
 838         struct sctp_nets *net;
 839
 840         if ((to == NULL) || (from == NULL)) {
 841                 return (NULL);
 842         }
 843         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 844                 lport = ((struct sockaddr_in *)to)->sin_port;
 845                 rport = ((struct sockaddr_in *)from)->sin_port;
 846         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 847                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 848                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 849         } else {
 850                 return NULL;
 851         }
 852         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))];
 853         /*
 854          * Ok now for each of the guys in this bucket we must look and see:
 855          * - Does the remote port match. - Does there single association's
 856          * addresses match this address (to). If so we update p_ep to point
 857          * to this ep and return the tcb from it.
 858          */
 859         LIST_FOREACH(inp, ephead, sctp_hash) {
 860                 SCTP_INP_RLOCK(inp);
 861                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 862                         SCTP_INP_RUNLOCK(inp);
 863                         continue;
 864                 }
 865                 if (lport != inp->sctp_lport) {
 866                         SCTP_INP_RUNLOCK(inp);
 867                         continue;
 868                 }
 869                 if (inp->def_vrf_id != vrf_id) {
 870                         SCTP_INP_RUNLOCK(inp);
 871                         continue;
 872                 }
 873                 /* check to see if the ep has one of the addresses */
 874                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 875                         /* We are NOT bound all, so look further */
 876                         int match = 0;
 877
 878                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 879
 880                                 if (laddr->ifa == NULL) {
 881                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 882                                         continue;
 883                                 }
 884                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 885                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 886                                         continue;
 887                                 }
 888                                 if (laddr->ifa->address.sa.sa_family ==
 889                                     to->sa_family) {
 890                                         /* see if it matches */
 891                                         struct sockaddr_in *intf_addr, *sin;
 892
 893                                         intf_addr = &laddr->ifa->address.sin;
 894                                         sin = (struct sockaddr_in *)to;
 895                                         if (from->sa_family == AF_INET) {
 896                                                 if (sin->sin_addr.s_addr ==
 897                                                     intf_addr->sin_addr.s_addr) {
 898                                                         match = 1;
 899                                                         break;
 900                                                 }
 901                                         }
 902 #ifdef INET6
 903                                         if (from->sa_family == AF_INET6) {
 904                                                 struct sockaddr_in6 *intf_addr6;
 905                                                 struct sockaddr_in6 *sin6;
 906
 907                                                 sin6 = (struct sockaddr_in6 *)
 908                                                     to;
 909                                                 intf_addr6 = &laddr->ifa->address.sin6;
 910
 911                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 912                                                     intf_addr6)) {
 913                                                         match = 1;
 914                                                         break;
 915                                                 }
 916                                         }
 917 #endif
 918                                 }
 919                         }
 920                         if (match == 0) {
 921                                 /* This endpoint does not have this address */
 922                                 SCTP_INP_RUNLOCK(inp);
 923                                 continue;
 924                         }
 925                 }
 926                 /*
 927                  * Ok if we hit here the ep has the address, does it hold
 928                  * the tcb?
 929                  */
 930
 931                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 932                 if (stcb == NULL) {
 933                         SCTP_INP_RUNLOCK(inp);
 934                         continue;
 935                 }
 936                 SCTP_TCB_LOCK(stcb);
 937                 if (stcb->rport != rport) {
 938                         /* remote port does not match. */
 939                         SCTP_TCB_UNLOCK(stcb);
 940                         SCTP_INP_RUNLOCK(inp);
 941                         continue;
 942                 }
 943                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 944                         SCTP_TCB_UNLOCK(stcb);
 945                         SCTP_INP_RUNLOCK(inp);
 946                         continue;
 947                 }
 948                 /* Does this TCB have a matching address? */
 949                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 950
 951                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 952                                 /* not the same family, can't be a match */
 953                                 continue;
 954                         }
 955                         switch (from->sa_family) {
 956                         case AF_INET:
 957                                 {
 958                                         struct sockaddr_in *sin, *rsin;
 959
 960                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 961                                         rsin = (struct sockaddr_in *)from;
 962                                         if (sin->sin_addr.s_addr ==
 963                                             rsin->sin_addr.s_addr) {
 964                                                 /* found it */
 965                                                 if (netp != NULL) {
 966                                                         *netp = net;
 967                                                 }
 968                                                 /*
 969                                                  * Update the endpoint
 970                                                  * pointer
 971                                                  */
 972                                                 *inp_p = inp;
 973                                                 SCTP_INP_RUNLOCK(inp);
 974                                                 return (stcb);
 975                                         }
 976                                         break;
 977                                 }
 978 #ifdef INET6
 979                         case AF_INET6:
 980                                 {
 981                                         struct sockaddr_in6 *sin6, *rsin6;
 982
 983                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 984                                         rsin6 = (struct sockaddr_in6 *)from;
 985                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 986                                             rsin6)) {
 987                                                 /* found it */
 988                                                 if (netp != NULL) {
 989                                                         *netp = net;
 990                                                 }
 991                                                 /*
 992                                                  * Update the endpoint
 993                                                  * pointer
 994                                                  */
 995                                                 *inp_p = inp;
 996                                                 SCTP_INP_RUNLOCK(inp);
 997                                                 return (stcb);
 998                                         }
 999                                         break;
1000                                 }
1001 #endif
1002                         default:
1003                                 /* TSNH */
1004                                 break;
1005                         }
1006                 }
1007                 SCTP_TCB_UNLOCK(stcb);
1008                 SCTP_INP_RUNLOCK(inp);
1009         }
1010         return (NULL);
1011 }
1012
1013 static int
1014 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1015 {
1016         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1017         int ipv4_addr_legal, ipv6_addr_legal;
1018         struct sctp_vrf *vrf;
1019         struct sctp_ifn *sctp_ifn;
1020         struct sctp_ifa *sctp_ifa;
1021
1022         loopback_scope = stcb->asoc.loopback_scope;
1023         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1024         local_scope = stcb->asoc.local_scope;
1025         site_scope = stcb->asoc.site_scope;
1026         ipv4_addr_legal = ipv6_addr_legal = 0;
1027         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1028                 ipv6_addr_legal = 1;
1029                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1030                         ipv4_addr_legal = 1;
1031                 }
1032         } else {
1033                 ipv4_addr_legal = 1;
1034         }
1035
1036         SCTP_IPI_ADDR_RLOCK();
1037         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1038         if (vrf == NULL) {
1039                 /* no vrf, no addresses */
1040                 SCTP_IPI_ADDR_RUNLOCK();
1041                 return (0);
1042         }
1043         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1044                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1045                         if ((loopback_scope == 0) &&
1046                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1047                                 continue;
1048                         }
1049                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1050                                 if (sctp_is_addr_restricted(stcb, sctp_ifa))
1051                                         continue;
1052                                 switch (sctp_ifa->address.sa.sa_family) {
1053 #ifdef INET
1054                                 case AF_INET:
1055                                         if (ipv4_addr_legal) {
1056                                                 struct sockaddr_in *sin,
1057                                                            *rsin;
1058
1059                                                 sin = &sctp_ifa->address.sin;
1060                                                 rsin = (struct sockaddr_in *)to;
1061                                                 if ((ipv4_local_scope == 0) &&
1062                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1063                                                         continue;
1064                                                 }
1065                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1066                                                         SCTP_IPI_ADDR_RUNLOCK();
1067                                                         return (1);
1068                                                 }
1069                                         }
1070                                         break;
1071 #endif
1072 #ifdef INET6
1073                                 case AF_INET6:
1074                                         if (ipv6_addr_legal) {
1075                                                 struct sockaddr_in6 *sin6,
1076                                                             *rsin6;
1077
1078                                                 sin6 = &sctp_ifa->address.sin6;
1079                                                 rsin6 = (struct sockaddr_in6 *)to;
1080                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1081                                                         if (local_scope == 0)
1082                                                                 continue;
1083                                                         if (sin6->sin6_scope_id == 0) {
1084                                                                 if (sa6_recoverscope(sin6) != 0)
1085                                                                         continue;
1086                                                         }
1087                                                 }
1088                                                 if ((site_scope == 0) &&
1089                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1090                                                         continue;
1091                                                 }
1092                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1093                                                         SCTP_IPI_ADDR_RUNLOCK();
1094                                                         return (1);
1095                                                 }
1096                                         }
1097                                         break;
1098 #endif
1099                                 default:
1100                                         /* TSNH */
1101                                         break;
1102                                 }
1103                         }
1104                 }
1105         } else {
1106                 struct sctp_laddr *laddr;
1107
1108                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1109                         if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
1110                                 continue;
1111                         }
1112                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1113                                 continue;
1114                         }
1115                         switch (to->sa_family) {
1116 #ifdef INET
1117                         case AF_INET:
1118                                 {
1119                                         struct sockaddr_in *sin, *rsin;
1120
1121                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1122                                         rsin = (struct sockaddr_in *)to;
1123                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1124                                                 SCTP_IPI_ADDR_RUNLOCK();
1125                                                 return (1);
1126                                         }
1127                                         break;
1128                                 }
1129 #endif
1130 #ifdef INET6
1131                         case AF_INET6:
1132                                 {
1133                                         struct sockaddr_in6 *sin6, *rsin6;
1134
1135                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1136                                         rsin6 = (struct sockaddr_in6 *)to;
1137                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1138                                                 SCTP_IPI_ADDR_RUNLOCK();
1139                                                 return (1);
1140                                         }
1141                                         break;
1142                                 }
1143
1144 #endif
1145                         default:
1146                                 /* TSNH */
1147                                 break;
1148                         }
1149
1150                 }
1151         }
1152         SCTP_IPI_ADDR_RUNLOCK();
1153         return (0);
1154 }
1155
1156 /*
1157  * rules for use
1158  *
1159  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1160  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1161  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1162  * NULL.
1163  */
1164
1165 struct sctp_tcb *
1166 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1167     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1168 {
1169         struct sctpasochead *head;
1170         struct sctp_inpcb *inp;
1171         struct sctp_tcb *stcb = NULL;
1172         struct sctp_nets *net;
1173         uint16_t rport;
1174
1175         inp = *inp_p;
1176         if (remote->sa_family == AF_INET) {
1177                 rport = (((struct sockaddr_in *)remote)->sin_port);
1178         } else if (remote->sa_family == AF_INET6) {
1179                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1180         } else {
1181                 return (NULL);
1182         }
1183         if (locked_tcb) {
1184                 /*
1185                  * UN-lock so we can do proper locking here this occurs when
1186                  * called from load_addresses_from_init.
1187                  */
1188                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1189                 SCTP_TCB_UNLOCK(locked_tcb);
1190         }
1191         SCTP_INP_INFO_RLOCK();
1192         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1193                 /*-
1194                  * Now either this guy is our listener or it's the
1195                  * connector. If it is the one that issued the connect, then
1196                  * it's only chance is to be the first TCB in the list. If
1197                  * it is the acceptor, then do the special_lookup to hash
1198                  * and find the real inp.
1199                  */
1200                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1201                         /* to is peer addr, from is my addr */
1202                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1203                             netp, inp->def_vrf_id);
1204                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1205                                 /* we have a locked tcb, lower refcount */
1206                                 SCTP_INP_DECR_REF(inp);
1207                         }
1208                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1209                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1210                                 SCTP_TCB_LOCK(locked_tcb);
1211                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1212                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1213                         }
1214                         SCTP_INP_INFO_RUNLOCK();
1215                         return (stcb);
1216                 } else {
1217                         SCTP_INP_WLOCK(inp);
1218                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1219                                 goto null_return;
1220                         }
1221                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1222                         if (stcb == NULL) {
1223                                 goto null_return;
1224                         }
1225                         SCTP_TCB_LOCK(stcb);
1226
1227                         if (stcb->rport != rport) {
1228                                 /* remote port does not match. */
1229                                 SCTP_TCB_UNLOCK(stcb);
1230                                 goto null_return;
1231                         }
1232                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1233                                 SCTP_TCB_UNLOCK(stcb);
1234                                 goto null_return;
1235                         }
1236                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1237                                 SCTP_TCB_UNLOCK(stcb);
1238                                 goto null_return;
1239                         }
1240                         /* now look at the list of remote addresses */
1241                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1242 #ifdef INVARIANTS
1243                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1244                                         panic("Corrupt net list");
1245                                 }
1246 #endif
1247                                 if (net->ro._l_addr.sa.sa_family !=
1248                                     remote->sa_family) {
1249                                         /* not the same family */
1250                                         continue;
1251                                 }
1252                                 switch (remote->sa_family) {
1253                                 case AF_INET:
1254                                         {
1255                                                 struct sockaddr_in *sin,
1256                                                            *rsin;
1257
1258                                                 sin = (struct sockaddr_in *)
1259                                                     &net->ro._l_addr;
1260                                                 rsin = (struct sockaddr_in *)remote;
1261                                                 if (sin->sin_addr.s_addr ==
1262                                                     rsin->sin_addr.s_addr) {
1263                                                         /* found it */
1264                                                         if (netp != NULL) {
1265                                                                 *netp = net;
1266                                                         }
1267                                                         if (locked_tcb == NULL) {
1268                                                                 SCTP_INP_DECR_REF(inp);
1269                                                         } else if (locked_tcb != stcb) {
1270                                                                 SCTP_TCB_LOCK(locked_tcb);
1271                                                         }
1272                                                         if (locked_tcb) {
1273                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1274                                                         }
1275                                                         SCTP_INP_WUNLOCK(inp);
1276                                                         SCTP_INP_INFO_RUNLOCK();
1277                                                         return (stcb);
1278                                                 }
1279                                                 break;
1280                                         }
1281 #ifdef INET6
1282                                 case AF_INET6:
1283                                         {
1284                                                 struct sockaddr_in6 *sin6,
1285                                                             *rsin6;
1286
1287                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1288                                                 rsin6 = (struct sockaddr_in6 *)remote;
1289                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1290                                                     rsin6)) {
1291                                                         /* found it */
1292                                                         if (netp != NULL) {
1293                                                                 *netp = net;
1294                                                         }
1295                                                         if (locked_tcb == NULL) {
1296                                                                 SCTP_INP_DECR_REF(inp);
1297                                                         } else if (locked_tcb != stcb) {
1298                                                                 SCTP_TCB_LOCK(locked_tcb);
1299                                                         }
1300                                                         if (locked_tcb) {
1301                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1302                                                         }
1303                                                         SCTP_INP_WUNLOCK(inp);
1304                                                         SCTP_INP_INFO_RUNLOCK();
1305                                                         return (stcb);
1306                                                 }
1307                                                 break;
1308                                         }
1309 #endif
1310                                 default:
1311                                         /* TSNH */
1312                                         break;
1313                                 }
1314                         }
1315                         SCTP_TCB_UNLOCK(stcb);
1316                 }
1317         } else {
1318                 SCTP_INP_WLOCK(inp);
1319                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1320                         goto null_return;
1321                 }
1322                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1323                     inp->sctp_hashmark)];
1324                 if (head == NULL) {
1325                         goto null_return;
1326                 }
1327                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1328                         if (stcb->rport != rport) {
1329                                 /* remote port does not match */
1330                                 continue;
1331                         }
1332                         SCTP_TCB_LOCK(stcb);
1333                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1334                                 SCTP_TCB_UNLOCK(stcb);
1335                                 continue;
1336                         }
1337                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1338                                 SCTP_TCB_UNLOCK(stcb);
1339                                 continue;
1340                         }
1341                         /* now look at the list of remote addresses */
1342                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1343 #ifdef INVARIANTS
1344                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1345                                         panic("Corrupt net list");
1346                                 }
1347 #endif
1348                                 if (net->ro._l_addr.sa.sa_family !=
1349                                     remote->sa_family) {
1350                                         /* not the same family */
1351                                         continue;
1352                                 }
1353                                 switch (remote->sa_family) {
1354                                 case AF_INET:
1355                                         {
1356                                                 struct sockaddr_in *sin,
1357                                                            *rsin;
1358
1359                                                 sin = (struct sockaddr_in *)
1360                                                     &net->ro._l_addr;
1361                                                 rsin = (struct sockaddr_in *)remote;
1362                                                 if (sin->sin_addr.s_addr ==
1363                                                     rsin->sin_addr.s_addr) {
1364                                                         /* found it */
1365                                                         if (netp != NULL) {
1366                                                                 *netp = net;
1367                                                         }
1368                                                         if (locked_tcb == NULL) {
1369                                                                 SCTP_INP_DECR_REF(inp);
1370                                                         } else if (locked_tcb != stcb) {
1371                                                                 SCTP_TCB_LOCK(locked_tcb);
1372                                                         }
1373                                                         if (locked_tcb) {
1374                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1375                                                         }
1376                                                         SCTP_INP_WUNLOCK(inp);
1377                                                         SCTP_INP_INFO_RUNLOCK();
1378                                                         return (stcb);
1379                                                 }
1380                                                 break;
1381                                         }
1382 #ifdef INET6
1383                                 case AF_INET6:
1384                                         {
1385                                                 struct sockaddr_in6 *sin6,
1386                                                             *rsin6;
1387
1388                                                 sin6 = (struct sockaddr_in6 *)
1389                                                     &net->ro._l_addr;
1390                                                 rsin6 = (struct sockaddr_in6 *)remote;
1391                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1392                                                     rsin6)) {
1393                                                         /* found it */
1394                                                         if (netp != NULL) {
1395                                                                 *netp = net;
1396                                                         }
1397                                                         if (locked_tcb == NULL) {
1398                                                                 SCTP_INP_DECR_REF(inp);
1399                                                         } else if (locked_tcb != stcb) {
1400                                                                 SCTP_TCB_LOCK(locked_tcb);
1401                                                         }
1402                                                         if (locked_tcb) {
1403                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1404                                                         }
1405                                                         SCTP_INP_WUNLOCK(inp);
1406                                                         SCTP_INP_INFO_RUNLOCK();
1407                                                         return (stcb);
1408                                                 }
1409                                                 break;
1410                                         }
1411 #endif
1412                                 default:
1413                                         /* TSNH */
1414                                         break;
1415                                 }
1416                         }
1417                         SCTP_TCB_UNLOCK(stcb);
1418                 }
1419         }
1420 null_return:
1421         /* clean up for returning null */
1422         if (locked_tcb) {
1423                 SCTP_TCB_LOCK(locked_tcb);
1424                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1425         }
1426         SCTP_INP_WUNLOCK(inp);
1427         SCTP_INP_INFO_RUNLOCK();
1428         /* not found */
1429         return (NULL);
1430 }
1431
1432 /*
1433  * Find an association for a specific endpoint using the association id given
1434  * out in the COMM_UP notification
1435  */
1436
1437 struct sctp_tcb *
1438 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1439 {
1440         /*
1441          * Use my the assoc_id to find a endpoint
1442          */
1443         struct sctpasochead *head;
1444         struct sctp_tcb *stcb;
1445         uint32_t id;
1446
1447         if (inp == NULL) {
1448                 SCTP_PRINTF("TSNH ep_associd\n");
1449                 return (NULL);
1450         }
1451         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1452                 SCTP_PRINTF("TSNH ep_associd0\n");
1453                 return (NULL);
1454         }
1455         id = (uint32_t) asoc_id;
1456         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1457         if (head == NULL) {
1458                 /* invalid id TSNH */
1459                 SCTP_PRINTF("TSNH ep_associd1\n");
1460                 return (NULL);
1461         }
1462         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1463                 if (stcb->asoc.assoc_id == id) {
1464                         if (inp != stcb->sctp_ep) {
1465                                 /*
1466                                  * some other guy has the same id active (id
1467                                  * collision ??).
1468                                  */
1469                                 SCTP_PRINTF("TSNH ep_associd2\n");
1470                                 continue;
1471                         }
1472                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1473                                 continue;
1474                         }
1475                         if (want_lock) {
1476                                 SCTP_TCB_LOCK(stcb);
1477                         }
1478                         return (stcb);
1479                 }
1480         }
1481         return (NULL);
1482 }
1483
1484
1485 struct sctp_tcb *
1486 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1487 {
1488         struct sctp_tcb *stcb;
1489
1490         SCTP_INP_RLOCK(inp);
1491         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1492         SCTP_INP_RUNLOCK(inp);
1493         return (stcb);
1494 }
1495
1496
1497 static struct sctp_inpcb *
1498 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1499     uint16_t lport, uint32_t vrf_id)
1500 {
1501         struct sctp_inpcb *inp;
1502         struct sockaddr_in *sin;
1503
1504 #ifdef INET6
1505         struct sockaddr_in6 *sin6;
1506
1507 #endif
1508         struct sctp_laddr *laddr;
1509
1510 #ifdef INET6
1511         struct sockaddr_in6 *intf_addr6;
1512
1513 #endif
1514
1515         int fnd;
1516
1517         /*
1518          * Endpoing probe expects that the INP_INFO is locked.
1519          */
1520         sin = NULL;
1521 #ifdef INET6
1522         sin6 = NULL;
1523 #endif
1524         switch (nam->sa_family) {
1525         case AF_INET:
1526                 sin = (struct sockaddr_in *)nam;
1527                 break;
1528 #ifdef INET6
1529         case AF_INET6:
1530                 sin6 = (struct sockaddr_in6 *)nam;
1531                 break;
1532 #endif
1533         default:
1534                 /* unsupported family */
1535                 return (NULL);
1536         }
1537
1538         if (head == NULL)
1539                 return (NULL);
1540
1541         LIST_FOREACH(inp, head, sctp_hash) {
1542                 SCTP_INP_RLOCK(inp);
1543                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1544                         SCTP_INP_RUNLOCK(inp);
1545                         continue;
1546                 }
1547                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1548                     (inp->sctp_lport == lport)) {
1549                         /* got it */
1550                         if ((nam->sa_family == AF_INET) &&
1551                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1552                             SCTP_IPV6_V6ONLY(inp)) {
1553                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1554                                 SCTP_INP_RUNLOCK(inp);
1555                                 continue;
1556                         }
1557                         /* A V6 address and the endpoint is NOT bound V6 */
1558                         if (nam->sa_family == AF_INET6 &&
1559                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1560                                 SCTP_INP_RUNLOCK(inp);
1561                                 continue;
1562                         }
1563                         /* does a VRF id match? */
1564                         fnd = 0;
1565                         if (inp->def_vrf_id == vrf_id)
1566                                 fnd = 1;
1567
1568                         SCTP_INP_RUNLOCK(inp);
1569                         if (!fnd)
1570                                 continue;
1571                         return (inp);
1572                 }
1573                 SCTP_INP_RUNLOCK(inp);
1574         }
1575         if ((nam->sa_family == AF_INET) &&
1576             (sin->sin_addr.s_addr == INADDR_ANY)) {
1577                 /* Can't hunt for one that has no address specified */
1578                 return (NULL);
1579         }
1580 #ifdef INET6
1581         if ((nam->sa_family == AF_INET6) &&
1582             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1583                 /* Can't hunt for one that has no address specified */
1584                 return (NULL);
1585         }
1586 #endif
1587         /*
1588          * ok, not bound to all so see if we can find a EP bound to this
1589          * address.
1590          */
1591         LIST_FOREACH(inp, head, sctp_hash) {
1592                 SCTP_INP_RLOCK(inp);
1593                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1594                         SCTP_INP_RUNLOCK(inp);
1595                         continue;
1596                 }
1597                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1598                         SCTP_INP_RUNLOCK(inp);
1599                         continue;
1600                 }
1601                 /*
1602                  * Ok this could be a likely candidate, look at all of its
1603                  * addresses
1604                  */
1605                 if (inp->sctp_lport != lport) {
1606                         SCTP_INP_RUNLOCK(inp);
1607                         continue;
1608                 }
1609                 /* does a VRF id match? */
1610                 fnd = 0;
1611                 if (inp->def_vrf_id == vrf_id)
1612                         fnd = 1;
1613
1614                 if (!fnd) {
1615                         SCTP_INP_RUNLOCK(inp);
1616                         continue;
1617                 }
1618                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1619                         if (laddr->ifa == NULL) {
1620                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1621                                     __FUNCTION__);
1622                                 continue;
1623                         }
1624                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1625                             laddr->ifa);
1626                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1627                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1628                                 continue;
1629                         }
1630                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1631                                 /* possible, see if it matches */
1632                                 struct sockaddr_in *intf_addr;
1633
1634                                 intf_addr = &laddr->ifa->address.sin;
1635                                 switch (nam->sa_family) {
1636                                 case AF_INET:
1637                                         if (sin->sin_addr.s_addr ==
1638                                             intf_addr->sin_addr.s_addr) {
1639                                                 SCTP_INP_RUNLOCK(inp);
1640                                                 return (inp);
1641                                         }
1642                                         break;
1643 #ifdef INET6
1644                                 case AF_INET6:
1645                                         intf_addr6 = &laddr->ifa->address.sin6;
1646                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1647                                             intf_addr6)) {
1648                                                 SCTP_INP_RUNLOCK(inp);
1649                                                 return (inp);
1650                                         }
1651                                         break;
1652 #endif
1653                                 }
1654                         }
1655                 }
1656                 SCTP_INP_RUNLOCK(inp);
1657         }
1658         return (NULL);
1659 }
1660
1661
1662 static struct sctp_inpcb *
1663 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1664 {
1665         struct sctppcbhead *head;
1666         struct sctp_inpcb *t_inp;
1667         int fnd;
1668
1669         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1670             SCTP_BASE_INFO(hashmark))];
1671         LIST_FOREACH(t_inp, head, sctp_hash) {
1672                 if (t_inp->sctp_lport != lport) {
1673                         continue;
1674                 }
1675                 /* is it in the VRF in question */
1676                 fnd = 0;
1677                 if (t_inp->def_vrf_id == vrf_id)
1678                         fnd = 1;
1679                 if (!fnd)
1680                         continue;
1681
1682                 /* This one is in use. */
1683                 /* check the v6/v4 binding issue */
1684                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1685                     SCTP_IPV6_V6ONLY(t_inp)) {
1686                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1687                                 /* collision in V6 space */
1688                                 return (t_inp);
1689                         } else {
1690                                 /* inp is BOUND_V4 no conflict */
1691                                 continue;
1692                         }
1693                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1694                         /* t_inp is bound v4 and v6, conflict always */
1695                         return (t_inp);
1696                 } else {
1697                         /* t_inp is bound only V4 */
1698                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1699                             SCTP_IPV6_V6ONLY(inp)) {
1700                                 /* no conflict */
1701                                 continue;
1702                         }
1703                         /* else fall through to conflict */
1704                 }
1705                 return (t_inp);
1706         }
1707         return (NULL);
1708 }
1709
1710
1711 int
1712 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1713 {
1714         /* For 1-2-1 with port reuse */
1715         struct sctppcbhead *head;
1716         struct sctp_inpcb *tinp;
1717
1718         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1719                 /* only works with port reuse on */
1720                 return (-1);
1721         }
1722         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1723                 return (0);
1724         }
1725         SCTP_INP_RUNLOCK(inp);
1726         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1727             SCTP_BASE_INFO(hashmark))];
1728         /* Kick out all non-listeners to the TCP hash */
1729         LIST_FOREACH(tinp, head, sctp_hash) {
1730                 if (tinp->sctp_lport != inp->sctp_lport) {
1731                         continue;
1732                 }
1733                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1734                         continue;
1735                 }
1736                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1737                         continue;
1738                 }
1739                 if (tinp->sctp_socket->so_qlimit) {
1740                         continue;
1741                 }
1742                 SCTP_INP_WLOCK(tinp);
1743                 LIST_REMOVE(tinp, sctp_hash);
1744                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1745                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1746                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1747                 SCTP_INP_WUNLOCK(tinp);
1748         }
1749         SCTP_INP_WLOCK(inp);
1750         /* Pull from where he was */
1751         LIST_REMOVE(inp, sctp_hash);
1752         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1753         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1754         LIST_INSERT_HEAD(head, inp, sctp_hash);
1755         SCTP_INP_WUNLOCK(inp);
1756         SCTP_INP_RLOCK(inp);
1757         return (0);
1758 }
1759
1760
1761 struct sctp_inpcb *
1762 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1763     uint32_t vrf_id)
1764 {
1765         /*
1766          * First we check the hash table to see if someone has this port
1767          * bound with just the port.
1768          */
1769         struct sctp_inpcb *inp;
1770         struct sctppcbhead *head;
1771         struct sockaddr_in *sin;
1772         struct sockaddr_in6 *sin6;
1773         int lport;
1774
1775         if (nam->sa_family == AF_INET) {
1776                 sin = (struct sockaddr_in *)nam;
1777                 lport = ((struct sockaddr_in *)nam)->sin_port;
1778         } else if (nam->sa_family == AF_INET6) {
1779                 sin6 = (struct sockaddr_in6 *)nam;
1780                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1781         } else {
1782                 /* unsupported family */
1783                 return (NULL);
1784         }
1785         /*
1786          * I could cheat here and just cast to one of the types but we will
1787          * do it right. It also provides the check against an Unsupported
1788          * type too.
1789          */
1790         /* Find the head of the ALLADDR chain */
1791         if (have_lock == 0) {
1792                 SCTP_INP_INFO_RLOCK();
1793         }
1794         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1795             SCTP_BASE_INFO(hashmark))];
1796         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1797
1798         /*
1799          * If the TCP model exists it could be that the main listening
1800          * endpoint is gone but there exists a connected socket for this guy
1801          * yet. If so we can return the first one that we find. This may NOT
1802          * be the correct one so the caller should be wary on the return
1803          * INP. Currently the onlyc caller that sets this flag is in bindx
1804          * where we are verifying that a user CAN bind the address. He
1805          * either has bound it already, or someone else has, or its open to
1806          * bind, so this is good enough.
1807          */
1808         if (inp == NULL && find_tcp_pool) {
1809                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
1810                 inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1811         }
1812         if (inp) {
1813                 SCTP_INP_INCR_REF(inp);
1814         }
1815         if (have_lock == 0) {
1816                 SCTP_INP_INFO_RUNLOCK();
1817         }
1818         return (inp);
1819 }
1820
1821 /*
1822  * Find an association for an endpoint with the pointer to whom you want to
1823  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1824  * need to change the *to to some other struct like a mbuf...
1825  */
1826 struct sctp_tcb *
1827 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1828     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1829     uint32_t vrf_id)
1830 {
1831         struct sctp_inpcb *inp = NULL;
1832         struct sctp_tcb *retval;
1833
1834         SCTP_INP_INFO_RLOCK();
1835         if (find_tcp_pool) {
1836                 if (inp_p != NULL) {
1837                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1838                             vrf_id);
1839                 } else {
1840                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1841                             vrf_id);
1842                 }
1843                 if (retval != NULL) {
1844                         SCTP_INP_INFO_RUNLOCK();
1845                         return (retval);
1846                 }
1847         }
1848         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1849         if (inp_p != NULL) {
1850                 *inp_p = inp;
1851         }
1852         SCTP_INP_INFO_RUNLOCK();
1853
1854         if (inp == NULL) {
1855                 return (NULL);
1856         }
1857         /*
1858          * ok, we have an endpoint, now lets find the assoc for it (if any)
1859          * we now place the source address or from in the to of the find
1860          * endpoint call. Since in reality this chain is used from the
1861          * inbound packet side.
1862          */
1863         if (inp_p != NULL) {
1864                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1865                     NULL);
1866         } else {
1867                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1868                     NULL);
1869         }
1870         return retval;
1871 }
1872
1873
1874 /*
1875  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1876  * find all addresses that the sender has specified in any address list. Each
1877  * address will be used to lookup the TCB and see if one exits.
1878  */
1879 static struct sctp_tcb *
1880 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1881     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1882     struct sockaddr *dest)
1883 {
1884         struct sockaddr_in sin4;
1885         struct sockaddr_in6 sin6;
1886         struct sctp_paramhdr *phdr, parm_buf;
1887         struct sctp_tcb *retval;
1888         uint32_t ptype, plen;
1889
1890         memset(&sin4, 0, sizeof(sin4));
1891         memset(&sin6, 0, sizeof(sin6));
1892         sin4.sin_len = sizeof(sin4);
1893         sin4.sin_family = AF_INET;
1894         sin4.sin_port = sh->src_port;
1895         sin6.sin6_len = sizeof(sin6);
1896         sin6.sin6_family = AF_INET6;
1897         sin6.sin6_port = sh->src_port;
1898
1899         retval = NULL;
1900         offset += sizeof(struct sctp_init_chunk);
1901
1902         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1903         while (phdr != NULL) {
1904                 /* now we must see if we want the parameter */
1905                 ptype = ntohs(phdr->param_type);
1906                 plen = ntohs(phdr->param_length);
1907                 if (plen == 0) {
1908                         break;
1909                 }
1910                 if (ptype == SCTP_IPV4_ADDRESS &&
1911                     plen == sizeof(struct sctp_ipv4addr_param)) {
1912                         /* Get the rest of the address */
1913                         struct sctp_ipv4addr_param ip4_parm, *p4;
1914
1915                         phdr = sctp_get_next_param(m, offset,
1916                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1917                         if (phdr == NULL) {
1918                                 return (NULL);
1919                         }
1920                         p4 = (struct sctp_ipv4addr_param *)phdr;
1921                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1922                         /* look it up */
1923                         retval = sctp_findassociation_ep_addr(inp_p,
1924                             (struct sockaddr *)&sin4, netp, dest, NULL);
1925                         if (retval != NULL) {
1926                                 return (retval);
1927                         }
1928                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1929                     plen == sizeof(struct sctp_ipv6addr_param)) {
1930                         /* Get the rest of the address */
1931                         struct sctp_ipv6addr_param ip6_parm, *p6;
1932
1933                         phdr = sctp_get_next_param(m, offset,
1934                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1935                         if (phdr == NULL) {
1936                                 return (NULL);
1937                         }
1938                         p6 = (struct sctp_ipv6addr_param *)phdr;
1939                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1940                         /* look it up */
1941                         retval = sctp_findassociation_ep_addr(inp_p,
1942                             (struct sockaddr *)&sin6, netp, dest, NULL);
1943                         if (retval != NULL) {
1944                                 return (retval);
1945                         }
1946                 }
1947                 offset += SCTP_SIZE32(plen);
1948                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1949                     sizeof(parm_buf));
1950         }
1951         return (NULL);
1952 }
1953
1954 static struct sctp_tcb *
1955 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1956     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1957     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1958 {
1959         /*
1960          * Use my vtag to hash. If we find it we then verify the source addr
1961          * is in the assoc. If all goes well we save a bit on rec of a
1962          * packet.
1963          */
1964         struct sctpasochead *head;
1965         struct sctp_nets *net;
1966         struct sctp_tcb *stcb;
1967
1968         *netp = NULL;
1969         *inp_p = NULL;
1970         SCTP_INP_INFO_RLOCK();
1971         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1972             SCTP_BASE_INFO(hashasocmark))];
1973         if (head == NULL) {
1974                 /* invalid vtag */
1975                 SCTP_INP_INFO_RUNLOCK();
1976                 return (NULL);
1977         }
1978         LIST_FOREACH(stcb, head, sctp_asocs) {
1979                 SCTP_INP_RLOCK(stcb->sctp_ep);
1980                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1981                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1982                         continue;
1983                 }
1984                 SCTP_TCB_LOCK(stcb);
1985                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1986                 if (stcb->asoc.my_vtag == vtag) {
1987                         /* candidate */
1988                         if (stcb->rport != rport) {
1989                                 SCTP_TCB_UNLOCK(stcb);
1990                                 continue;
1991                         }
1992                         if (stcb->sctp_ep->sctp_lport != lport) {
1993                                 SCTP_TCB_UNLOCK(stcb);
1994                                 continue;
1995                         }
1996                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1997                                 SCTP_TCB_UNLOCK(stcb);
1998                                 continue;
1999                         }
2000                         /* RRS:Need toaddr check here */
2001                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2002                                 /* Endpoint does not own this address */
2003                                 SCTP_TCB_UNLOCK(stcb);
2004                                 continue;
2005                         }
2006                         if (remote_tag) {
2007                                 /*
2008                                  * If we have both vtags thats all we match
2009                                  * on
2010                                  */
2011                                 if (stcb->asoc.peer_vtag == remote_tag) {
2012                                         /*
2013                                          * If both tags match we consider it
2014                                          * conclusive and check NO
2015                                          * source/destination addresses
2016                                          */
2017                                         goto conclusive;
2018                                 }
2019                         }
2020                         if (skip_src_check) {
2021                 conclusive:
2022                                 if (from) {
2023                                         net = sctp_findnet(stcb, from);
2024                                 } else {
2025                                         *netp = NULL;   /* unknown */
2026                                 }
2027                                 if (inp_p)
2028                                         *inp_p = stcb->sctp_ep;
2029                                 SCTP_INP_INFO_RUNLOCK();
2030                                 return (stcb);
2031                         }
2032                         net = sctp_findnet(stcb, from);
2033                         if (net) {
2034                                 /* yep its him. */
2035                                 *netp = net;
2036                                 SCTP_STAT_INCR(sctps_vtagexpress);
2037                                 *inp_p = stcb->sctp_ep;
2038                                 SCTP_INP_INFO_RUNLOCK();
2039                                 return (stcb);
2040                         } else {
2041                                 /*
2042                                  * not him, this should only happen in rare
2043                                  * cases so I peg it.
2044                                  */
2045                                 SCTP_STAT_INCR(sctps_vtagbogus);
2046                         }
2047                 }
2048                 SCTP_TCB_UNLOCK(stcb);
2049         }
2050         SCTP_INP_INFO_RUNLOCK();
2051         return (NULL);
2052 }
2053
2054 /*
2055  * Find an association with the pointer to the inbound IP packet. This can be
2056  * a IPv4 or IPv6 packet.
2057  */
2058 struct sctp_tcb *
2059 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2060     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2061     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2062 {
2063         int find_tcp_pool;
2064         struct ip *iph;
2065         struct sctp_tcb *retval;
2066         struct sockaddr_storage to_store, from_store;
2067         struct sockaddr *to = (struct sockaddr *)&to_store;
2068         struct sockaddr *from = (struct sockaddr *)&from_store;
2069         struct sctp_inpcb *inp;
2070
2071         iph = mtod(m, struct ip *);
2072         switch (iph->ip_v) {
2073         case IPVERSION:
2074                 {
2075                         /* its IPv4 */
2076                         struct sockaddr_in *from4;
2077
2078                         from4 = (struct sockaddr_in *)&from_store;
2079                         bzero(from4, sizeof(*from4));
2080                         from4->sin_family = AF_INET;
2081                         from4->sin_len = sizeof(struct sockaddr_in);
2082                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2083                         from4->sin_port = sh->src_port;
2084                         break;
2085                 }
2086 #ifdef INET6
2087         case IPV6_VERSION >> 4:
2088                 {
2089                         /* its IPv6 */
2090                         struct ip6_hdr *ip6;
2091                         struct sockaddr_in6 *from6;
2092
2093                         ip6 = mtod(m, struct ip6_hdr *);
2094                         from6 = (struct sockaddr_in6 *)&from_store;
2095                         bzero(from6, sizeof(*from6));
2096                         from6->sin6_family = AF_INET6;
2097                         from6->sin6_len = sizeof(struct sockaddr_in6);
2098                         from6->sin6_addr = ip6->ip6_src;
2099                         from6->sin6_port = sh->src_port;
2100                         /* Get the scopes in properly to the sin6 addr's */
2101                         /* we probably don't need these operations */
2102                         (void)sa6_recoverscope(from6);
2103                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2104                         break;
2105                 }
2106 #endif
2107         default:
2108                 /* Currently not supported. */
2109                 return (NULL);
2110         }
2111
2112
2113         switch (iph->ip_v) {
2114         case IPVERSION:
2115                 {
2116                         /* its IPv4 */
2117                         struct sockaddr_in *to4;
2118
2119                         to4 = (struct sockaddr_in *)&to_store;
2120                         bzero(to4, sizeof(*to4));
2121                         to4->sin_family = AF_INET;
2122                         to4->sin_len = sizeof(struct sockaddr_in);
2123                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2124                         to4->sin_port = sh->dest_port;
2125                         break;
2126                 }
2127 #ifdef INET6
2128         case IPV6_VERSION >> 4:
2129                 {
2130                         /* its IPv6 */
2131                         struct ip6_hdr *ip6;
2132                         struct sockaddr_in6 *to6;
2133
2134                         ip6 = mtod(m, struct ip6_hdr *);
2135                         to6 = (struct sockaddr_in6 *)&to_store;
2136                         bzero(to6, sizeof(*to6));
2137                         to6->sin6_family = AF_INET6;
2138                         to6->sin6_len = sizeof(struct sockaddr_in6);
2139                         to6->sin6_addr = ip6->ip6_dst;
2140                         to6->sin6_port = sh->dest_port;
2141                         /* Get the scopes in properly to the sin6 addr's */
2142                         /* we probably don't need these operations */
2143                         (void)sa6_recoverscope(to6);
2144                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2145                         break;
2146                 }
2147 #endif
2148         default:
2149                 /* TSNH */
2150                 break;
2151         }
2152         if (sh->v_tag) {
2153                 /* we only go down this path if vtag is non-zero */
2154                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2155                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2156                 if (retval) {
2157                         return (retval);
2158                 }
2159         }
2160         find_tcp_pool = 0;
2161         if ((ch->chunk_type != SCTP_INITIATION) &&
2162             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2163             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2164             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2165                 /* Other chunk types go to the tcp pool. */
2166                 find_tcp_pool = 1;
2167         }
2168         if (inp_p) {
2169                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2170                     find_tcp_pool, vrf_id);
2171                 inp = *inp_p;
2172         } else {
2173                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2174                     find_tcp_pool, vrf_id);
2175         }
2176         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2177         if (retval == NULL && inp) {
2178                 /* Found a EP but not this address */
2179                 if ((ch->chunk_type == SCTP_INITIATION) ||
2180                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2181                         /*-
2182                          * special hook, we do NOT return linp or an
2183                          * association that is linked to an existing
2184                          * association that is under the TCP pool (i.e. no
2185                          * listener exists). The endpoint finding routine
2186                          * will always find a listner before examining the
2187                          * TCP pool.
2188                          */
2189                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2190                                 if (inp_p) {
2191                                         *inp_p = NULL;
2192                                 }
2193                                 return (NULL);
2194                         }
2195                         retval = sctp_findassociation_special_addr(m, iphlen,
2196                             offset, sh, &inp, netp, to);
2197                         if (inp_p != NULL) {
2198                                 *inp_p = inp;
2199                         }
2200                 }
2201         }
2202         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2203         return (retval);
2204 }
2205
2206 /*
2207  * lookup an association by an ASCONF lookup address.
2208  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2209  */
2210 struct sctp_tcb *
2211 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2212     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2213 {
2214         struct sctp_tcb *stcb;
2215         struct sockaddr_in *sin;
2216
2217 #ifdef INET6
2218         struct sockaddr_in6 *sin6;
2219
2220 #endif
2221         struct sockaddr_storage local_store, remote_store;
2222         struct sockaddr *to;
2223         struct ip *iph;
2224
2225 #ifdef INET6
2226         struct ip6_hdr *ip6;
2227
2228 #endif
2229         struct sctp_paramhdr parm_buf, *phdr;
2230         int ptype;
2231         int zero_address = 0;
2232
2233
2234         memset(&local_store, 0, sizeof(local_store));
2235         memset(&remote_store, 0, sizeof(remote_store));
2236         to = (struct sockaddr *)&local_store;
2237         /* First get the destination address setup too. */
2238         iph = mtod(m, struct ip *);
2239         switch (iph->ip_v) {
2240         case IPVERSION:
2241                 /* its IPv4 */
2242                 sin = (struct sockaddr_in *)&local_store;
2243                 sin->sin_family = AF_INET;
2244                 sin->sin_len = sizeof(*sin);
2245                 sin->sin_port = sh->dest_port;
2246                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2247                 break;
2248 #ifdef INET6
2249         case IPV6_VERSION >> 4:
2250                 /* its IPv6 */
2251                 ip6 = mtod(m, struct ip6_hdr *);
2252                 sin6 = (struct sockaddr_in6 *)&local_store;
2253                 sin6->sin6_family = AF_INET6;
2254                 sin6->sin6_len = sizeof(*sin6);
2255                 sin6->sin6_port = sh->dest_port;
2256                 sin6->sin6_addr = ip6->ip6_dst;
2257                 break;
2258 #endif
2259         default:
2260                 return NULL;
2261         }
2262
2263         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2264             &parm_buf, sizeof(struct sctp_paramhdr));
2265         if (phdr == NULL) {
2266                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2267                     __FUNCTION__);
2268                 return NULL;
2269         }
2270         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2271         /* get the correlation address */
2272         switch (ptype) {
2273 #ifdef INET6
2274         case SCTP_IPV6_ADDRESS:
2275                 {
2276                         /* ipv6 address param */
2277                         struct sctp_ipv6addr_param *p6, p6_buf;
2278
2279                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2280                                 return NULL;
2281                         }
2282                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2283                             offset + sizeof(struct sctp_asconf_chunk),
2284                             &p6_buf.ph, sizeof(*p6));
2285                         if (p6 == NULL) {
2286                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2287                                     __FUNCTION__);
2288                                 return (NULL);
2289                         }
2290                         sin6 = (struct sockaddr_in6 *)&remote_store;
2291                         sin6->sin6_family = AF_INET6;
2292                         sin6->sin6_len = sizeof(*sin6);
2293                         sin6->sin6_port = sh->src_port;
2294                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2295                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2296                                 zero_address = 1;
2297                         break;
2298                 }
2299 #endif
2300         case SCTP_IPV4_ADDRESS:
2301                 {
2302                         /* ipv4 address param */
2303                         struct sctp_ipv4addr_param *p4, p4_buf;
2304
2305                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2306                                 return NULL;
2307                         }
2308                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2309                             offset + sizeof(struct sctp_asconf_chunk),
2310                             &p4_buf.ph, sizeof(*p4));
2311                         if (p4 == NULL) {
2312                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2313                                     __FUNCTION__);
2314                                 return (NULL);
2315                         }
2316                         sin = (struct sockaddr_in *)&remote_store;
2317                         sin->sin_family = AF_INET;
2318                         sin->sin_len = sizeof(*sin);
2319                         sin->sin_port = sh->src_port;
2320                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2321                         if (sin->sin_addr.s_addr == INADDR_ANY)
2322                                 zero_address = 1;
2323                         break;
2324                 }
2325         default:
2326                 /* invalid address param type */
2327                 return NULL;
2328         }
2329
2330         if (zero_address) {
2331                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2332                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2333                 /*
2334                  * printf("findassociation_ep_asconf: zero lookup address
2335                  * finds stcb 0x%x\n", (uint32_t)stcb);
2336                  */
2337         } else {
2338                 stcb = sctp_findassociation_ep_addr(inp_p,
2339                     (struct sockaddr *)&remote_store, netp,
2340                     to, NULL);
2341         }
2342         return (stcb);
2343 }
2344
2345
2346 /*
2347  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2348  * addresses. This way if we don't get a bind we by default pick a ephemeral
2349  * port with all addresses bound.
2350  */
2351 int
2352 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2353 {
2354         /*
2355          * we get called when a new endpoint starts up. We need to allocate
2356          * the sctp_inpcb structure from the zone and init it. Mark it as
2357          * unbound and find a port that we can use as an ephemeral with
2358          * INADDR_ANY. If the user binds later no problem we can then add in
2359          * the specific addresses. And setup the default parameters for the
2360          * EP.
2361          */
2362         int i, error;
2363         struct sctp_inpcb *inp;
2364         struct sctp_pcb *m;
2365         struct timeval time;
2366         sctp_sharedkey_t *null_key;
2367
2368         error = 0;
2369
2370         SCTP_INP_INFO_WLOCK();
2371         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2372         if (inp == NULL) {
2373                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2374                 SCTP_INP_INFO_WUNLOCK();
2375                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2376                 return (ENOBUFS);
2377         }
2378         /* zap it */
2379         bzero(inp, sizeof(*inp));
2380
2381         /* bump generations */
2382         /* setup socket pointers */
2383         inp->sctp_socket = so;
2384         inp->ip_inp.inp.inp_socket = so;
2385         inp->sctp_associd_counter = 1;
2386         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2387         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2388         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2389         /* init the small hash table we use to track asocid <-> tcb */
2390         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2391         if (inp->sctp_asocidhash == NULL) {
2392                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2393                 SCTP_INP_INFO_WUNLOCK();
2394                 return (ENOBUFS);
2395         }
2396 #ifdef IPSEC
2397         {
2398                 struct inpcbpolicy *pcb_sp = NULL;
2399
2400                 error = ipsec_init_policy(so, &pcb_sp);
2401                 /* Arrange to share the policy */
2402                 inp->ip_inp.inp.inp_sp = pcb_sp;
2403                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2404         }
2405         if (error != 0) {
2406                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2407                 SCTP_INP_INFO_WUNLOCK();
2408                 return error;
2409         }
2410 #endif                          /* IPSEC */
2411         SCTP_INCR_EP_COUNT();
2412         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2413         SCTP_INP_INFO_WUNLOCK();
2414
2415         so->so_pcb = (caddr_t)inp;
2416
2417         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2418             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2419                 /* UDP style socket */
2420                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2421                     SCTP_PCB_FLAGS_UNBOUND);
2422                 /* Be sure it is NON-BLOCKING IO for UDP */
2423                 /* SCTP_SET_SO_NBIO(so); */
2424         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2425                 /* TCP style socket */
2426                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2427                     SCTP_PCB_FLAGS_UNBOUND);
2428                 /* Be sure we have blocking IO by default */
2429                 SCTP_CLEAR_SO_NBIO(so);
2430         } else {
2431                 /*
2432                  * unsupported socket type (RAW, etc)- in case we missed it
2433                  * in protosw
2434                  */
2435                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2436                 so->so_pcb = NULL;
2437                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2438                 return (EOPNOTSUPP);
2439         }
2440         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2441                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2442                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2443         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2444                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2445                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2446         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2447                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2448                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2449         }
2450         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2451             &inp->sctp_hashmark);
2452         if (inp->sctp_tcbhash == NULL) {
2453                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2454                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2455                 so->so_pcb = NULL;
2456                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2457                 return (ENOBUFS);
2458         }
2459         inp->def_vrf_id = vrf_id;
2460
2461         SCTP_INP_INFO_WLOCK();
2462         SCTP_INP_LOCK_INIT(inp);
2463         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2464         SCTP_INP_READ_INIT(inp);
2465         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2466         /* lock the new ep */
2467         SCTP_INP_WLOCK(inp);
2468
2469         /* add it to the info area */
2470         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2471         SCTP_INP_INFO_WUNLOCK();
2472
2473         TAILQ_INIT(&inp->read_queue);
2474         LIST_INIT(&inp->sctp_addr_list);
2475
2476         LIST_INIT(&inp->sctp_asoc_list);
2477
2478 #ifdef SCTP_TRACK_FREED_ASOCS
2479         /* TEMP CODE */
2480         LIST_INIT(&inp->sctp_asoc_free_list);
2481 #endif
2482         /* Init the timer structure for signature change */
2483         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2484         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2485
2486         /* now init the actual endpoint default data */
2487         m = &inp->sctp_ep;
2488
2489         /* setup the base timeout information */
2490         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2491         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2492         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2493         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2494         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2495         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2496         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2497         /* all max/min max are in ms */
2498         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2499         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2500         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2501         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2502         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2503
2504         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2505
2506         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2507         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2508         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2509         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2510         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2511         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2512         if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) &&
2513             (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) {
2514                 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2515         } else {
2516                 /* sysctl done with invalid value, set to 2581 */
2517                 m->sctp_default_cc_module = SCTP_CC_RFC2581;
2518         }
2519         /* number of streams to pre-open on a association */
2520         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2521
2522         /* Add adaptation cookie */
2523         m->adaptation_layer_indicator = 0x504C5253;
2524
2525         /* seed random number generator */
2526         m->random_counter = 1;
2527         m->store_at = SCTP_SIGNATURE_SIZE;
2528         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2529         sctp_fill_random_store(m);
2530
2531         /* Minimum cookie size */
2532         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2533             sizeof(struct sctp_state_cookie);
2534         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2535
2536         /* Setup the initial secret */
2537         (void)SCTP_GETTIME_TIMEVAL(&time);
2538         m->time_of_secret_change = time.tv_sec;
2539
2540         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2541                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2542         }
2543         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2544
2545         /* How long is a cookie good for ? */
2546         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2547         /*
2548          * Initialize authentication parameters
2549          */
2550         m->local_hmacs = sctp_default_supported_hmaclist();
2551         m->local_auth_chunks = sctp_alloc_chunklist();
2552         sctp_auth_set_default_chunks(m->local_auth_chunks);
2553         LIST_INIT(&m->shared_keys);
2554         /* add default NULL key as key id 0 */
2555         null_key = sctp_alloc_sharedkey();
2556         sctp_insert_sharedkey(&m->shared_keys, null_key);
2557         SCTP_INP_WUNLOCK(inp);
2558 #ifdef SCTP_LOG_CLOSING
2559         sctp_log_closing(inp, NULL, 12);
2560 #endif
2561         return (error);
2562 }
2563
2564
2565 void
2566 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2567     struct sctp_tcb *stcb)
2568 {
2569         struct sctp_nets *net;
2570         uint16_t lport, rport;
2571         struct sctppcbhead *head;
2572         struct sctp_laddr *laddr, *oladdr;
2573
2574         atomic_add_int(&stcb->asoc.refcnt, 1);
2575         SCTP_TCB_UNLOCK(stcb);
2576         SCTP_INP_INFO_WLOCK();
2577         SCTP_INP_WLOCK(old_inp);
2578         SCTP_INP_WLOCK(new_inp);
2579         SCTP_TCB_LOCK(stcb);
2580         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2581
2582         new_inp->sctp_ep.time_of_secret_change =
2583             old_inp->sctp_ep.time_of_secret_change;
2584         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2585             sizeof(old_inp->sctp_ep.secret_key));
2586         new_inp->sctp_ep.current_secret_number =
2587             old_inp->sctp_ep.current_secret_number;
2588         new_inp->sctp_ep.last_secret_number =
2589             old_inp->sctp_ep.last_secret_number;
2590         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2591
2592         /* make it so new data pours into the new socket */
2593         stcb->sctp_socket = new_inp->sctp_socket;
2594         stcb->sctp_ep = new_inp;
2595
2596         /* Copy the port across */
2597         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2598         rport = stcb->rport;
2599         /* Pull the tcb from the old association */
2600         LIST_REMOVE(stcb, sctp_tcbhash);
2601         LIST_REMOVE(stcb, sctp_tcblist);
2602         if (stcb->asoc.in_asocid_hash) {
2603                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2604         }
2605         /* Now insert the new_inp into the TCP connected hash */
2606         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
2607             SCTP_BASE_INFO(hashtcpmark))];
2608
2609         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2610         /* Its safe to access */
2611         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2612
2613         /* Now move the tcb into the endpoint list */
2614         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2615         /*
2616          * Question, do we even need to worry about the ep-hash since we
2617          * only have one connection? Probably not :> so lets get rid of it
2618          * and not suck up any kernel memory in that.
2619          */
2620         if (stcb->asoc.in_asocid_hash) {
2621                 struct sctpasochead *lhd;
2622
2623                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2624                     new_inp->hashasocidmark)];
2625                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2626         }
2627         /* Ok. Let's restart timer. */
2628         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2629                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2630                     stcb, net);
2631         }
2632
2633         SCTP_INP_INFO_WUNLOCK();
2634         if (new_inp->sctp_tcbhash != NULL) {
2635                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2636                 new_inp->sctp_tcbhash = NULL;
2637         }
2638         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2639                 /* Subset bound, so copy in the laddr list from the old_inp */
2640                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2641                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2642                         if (laddr == NULL) {
2643                                 /*
2644                                  * Gak, what can we do? This assoc is really
2645                                  * HOSED. We probably should send an abort
2646                                  * here.
2647                                  */
2648                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2649                                 continue;
2650                         }
2651                         SCTP_INCR_LADDR_COUNT();
2652                         bzero(laddr, sizeof(*laddr));
2653                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2654                         laddr->ifa = oladdr->ifa;
2655                         atomic_add_int(&laddr->ifa->refcount, 1);
2656                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2657                             sctp_nxt_addr);
2658                         new_inp->laddr_count++;
2659                 }
2660         }
2661         /*
2662          * Now any running timers need to be adjusted since we really don't
2663          * care if they are running or not just blast in the new_inp into
2664          * all of them.
2665          */
2666
2667         stcb->asoc.hb_timer.ep = (void *)new_inp;
2668         stcb->asoc.dack_timer.ep = (void *)new_inp;
2669         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2670         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2671         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2672         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2673         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2674         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2675         /* now what about the nets? */
2676         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2677                 net->pmtu_timer.ep = (void *)new_inp;
2678                 net->rxt_timer.ep = (void *)new_inp;
2679                 net->fr_timer.ep = (void *)new_inp;
2680         }
2681         SCTP_INP_WUNLOCK(new_inp);
2682         SCTP_INP_WUNLOCK(old_inp);
2683 }
2684
2685
2686
2687
2688 /* sctp_ifap is used to bypass normal local address validation checks */
2689 int
2690 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2691     struct sctp_ifa *sctp_ifap, struct thread *p)
2692 {
2693         /* bind a ep to a socket address */
2694         struct sctppcbhead *head;
2695         struct sctp_inpcb *inp, *inp_tmp;
2696         struct inpcb *ip_inp;
2697         int port_reuse_active = 0;
2698         int bindall;
2699         uint16_t lport;
2700         int error;
2701         uint32_t vrf_id;
2702
2703         lport = 0;
2704         error = 0;
2705         bindall = 1;
2706         inp = (struct sctp_inpcb *)so->so_pcb;
2707         ip_inp = (struct inpcb *)so->so_pcb;
2708 #ifdef SCTP_DEBUG
2709         if (addr) {
2710                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2711                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2712                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2713                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2714         }
2715 #endif
2716         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2717                 /* already did a bind, subsequent binds NOT allowed ! */
2718                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2719                 return (EINVAL);
2720         }
2721 #ifdef INVARIANTS
2722         if (p == NULL)
2723                 panic("null proc/thread");
2724 #endif
2725         if (addr != NULL) {
2726                 switch (addr->sa_family) {
2727                 case AF_INET:
2728                         {
2729                                 struct sockaddr_in *sin;
2730
2731                                 /* IPV6_V6ONLY socket? */
2732                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2733                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2734                                         return (EINVAL);
2735                                 }
2736                                 if (addr->sa_len != sizeof(*sin)) {
2737                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2738                                         return (EINVAL);
2739                                 }
2740                                 sin = (struct sockaddr_in *)addr;
2741                                 lport = sin->sin_port;
2742                                 /*
2743                                  * For LOOPBACK the prison_local_ip4() call
2744                                  * will transmute the ip address to the
2745                                  * proper value.
2746                                  */
2747                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2748                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2749                                         return (error);
2750                                 }
2751                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2752                                         bindall = 0;
2753                                 }
2754                                 break;
2755                         }
2756 #ifdef INET6
2757                 case AF_INET6:
2758                         {
2759                                 /*
2760                                  * Only for pure IPv6 Address. (No IPv4
2761                                  * Mapped!)
2762                                  */
2763                                 struct sockaddr_in6 *sin6;
2764
2765                                 sin6 = (struct sockaddr_in6 *)addr;
2766
2767                                 if (addr->sa_len != sizeof(*sin6)) {
2768                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2769                                         return (EINVAL);
2770                                 }
2771                                 lport = sin6->sin6_port;
2772
2773                                 /*
2774                                  * For LOOPBACK the prison_local_ip6() call
2775                                  * will transmute the ipv6 address to the
2776                                  * proper value.
2777                                  */
2778                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2779                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2780                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2781                                         return (error);
2782                                 }
2783                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2784                                         bindall = 0;
2785                                         /* KAME hack: embed scopeid */
2786                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2787                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2788                                                 return (EINVAL);
2789                                         }
2790                                 }
2791                                 /* this must be cleared for ifa_ifwithaddr() */
2792                                 sin6->sin6_scope_id = 0;
2793                                 break;
2794                         }
2795 #endif
2796                 default:
2797                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2798                         return (EAFNOSUPPORT);
2799                 }
2800         }
2801         SCTP_INP_INFO_WLOCK();
2802         SCTP_INP_WLOCK(inp);
2803         /* Setup a vrf_id to be the default for the non-bind-all case. */
2804         vrf_id = inp->def_vrf_id;
2805
2806         /* increase our count due to the unlock we do */
2807         SCTP_INP_INCR_REF(inp);
2808         if (lport) {
2809                 /*
2810                  * Did the caller specify a port? if so we must see if a ep
2811                  * already has this one bound.
2812                  */
2813                 /* got to be root to get at low ports */
2814                 if (ntohs(lport) < IPPORT_RESERVED) {
2815                         if (p && (error =
2816                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2817                             )) {
2818                                 SCTP_INP_DECR_REF(inp);
2819                                 SCTP_INP_WUNLOCK(inp);
2820                                 SCTP_INP_INFO_WUNLOCK();
2821                                 return (error);
2822                         }
2823                 }
2824                 if (p == NULL) {
2825                         SCTP_INP_DECR_REF(inp);
2826                         SCTP_INP_WUNLOCK(inp);
2827                         SCTP_INP_INFO_WUNLOCK();
2828                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2829                         return (error);
2830                 }
2831                 SCTP_INP_WUNLOCK(inp);
2832                 if (bindall) {
2833                         vrf_id = inp->def_vrf_id;
2834                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2835                         if (inp_tmp != NULL) {
2836                                 /*
2837                                  * lock guy returned and lower count note
2838                                  * that we are not bound so inp_tmp should
2839                                  * NEVER be inp. And it is this inp
2840                                  * (inp_tmp) that gets the reference bump,
2841                                  * so we must lower it.
2842                                  */
2843                                 SCTP_INP_DECR_REF(inp_tmp);
2844                                 /* unlock info */
2845                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2846                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2847                                         /*
2848                                          * Ok, must be one-2-one and
2849                                          * allowing port re-use
2850                                          */
2851                                         port_reuse_active = 1;
2852                                         goto continue_anyway;
2853                                 }
2854                                 SCTP_INP_DECR_REF(inp);
2855                                 SCTP_INP_INFO_WUNLOCK();
2856                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2857                                 return (EADDRINUSE);
2858                         }
2859                 } else {
2860                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2861                         if (inp_tmp != NULL) {
2862                                 /*
2863                                  * lock guy returned and lower count note
2864                                  * that we are not bound so inp_tmp should
2865                                  * NEVER be inp. And it is this inp
2866                                  * (inp_tmp) that gets the reference bump,
2867                                  * so we must lower it.
2868                                  */
2869                                 SCTP_INP_DECR_REF(inp_tmp);
2870                                 /* unlock info */
2871                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2872                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2873                                         /*
2874                                          * Ok, must be one-2-one and
2875                                          * allowing port re-use
2876                                          */
2877                                         port_reuse_active = 1;
2878                                         goto continue_anyway;
2879                                 }
2880                                 SCTP_INP_DECR_REF(inp);
2881                                 SCTP_INP_INFO_WUNLOCK();
2882                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2883                                 return (EADDRINUSE);
2884                         }
2885                 }
2886 continue_anyway:
2887                 SCTP_INP_WLOCK(inp);
2888                 if (bindall) {
2889                         /* verify that no lport is not used by a singleton */
2890                         if ((port_reuse_active == 0) &&
2891                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2892                             ) {
2893                                 /* Sorry someone already has this one bound */
2894                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2895                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2896                                         port_reuse_active = 1;
2897                                 } else {
2898                                         SCTP_INP_DECR_REF(inp);
2899                                         SCTP_INP_WUNLOCK(inp);
2900                                         SCTP_INP_INFO_WUNLOCK();
2901                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2902                                         return (EADDRINUSE);
2903                                 }
2904                         }
2905                 }
2906         } else {
2907                 uint16_t first, last, candidate;
2908                 uint16_t count;
2909                 int done;
2910
2911                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2912                         first = MODULE_GLOBAL(ipport_hifirstauto);
2913                         last = MODULE_GLOBAL(ipport_hilastauto);
2914                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2915                         if (p && (error =
2916                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2917                             )) {
2918                                 SCTP_INP_DECR_REF(inp);
2919                                 SCTP_INP_WUNLOCK(inp);
2920                                 SCTP_INP_INFO_WUNLOCK();
2921                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2922                                 return (error);
2923                         }
2924                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2925                         last = MODULE_GLOBAL(ipport_lowlastauto);
2926                 } else {
2927                         first = MODULE_GLOBAL(ipport_firstauto);
2928                         last = MODULE_GLOBAL(ipport_lastauto);
2929                 }
2930                 if (first > last) {
2931                         uint16_t temp;
2932
2933                         temp = first;
2934                         first = last;
2935                         last = temp;
2936                 }
2937                 count = last - first + 1;       /* number of candidates */
2938                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2939
2940                 done = 0;
2941                 while (!done) {
2942                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2943                                 done = 1;
2944                         }
2945                         if (!done) {
2946                                 if (--count == 0) {
2947                                         SCTP_INP_DECR_REF(inp);
2948                                         SCTP_INP_WUNLOCK(inp);
2949                                         SCTP_INP_INFO_WUNLOCK();
2950                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2951                                         return (EADDRINUSE);
2952                                 }
2953                                 if (candidate == last)
2954                                         candidate = first;
2955                                 else
2956                                         candidate = candidate + 1;
2957                         }
2958                 }
2959                 lport = htons(candidate);
2960         }
2961         SCTP_INP_DECR_REF(inp);
2962         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2963             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2964                 /*
2965                  * this really should not happen. The guy did a non-blocking
2966                  * bind and then did a close at the same time.
2967                  */
2968                 SCTP_INP_WUNLOCK(inp);
2969                 SCTP_INP_INFO_WUNLOCK();
2970                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2971                 return (EINVAL);
2972         }
2973         /* ok we look clear to give out this port, so lets setup the binding */
2974         if (bindall) {
2975                 /* binding to all addresses, so just set in the proper flags */
2976                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2977                 /* set the automatic addr changes from kernel flag */
2978                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2979                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2980                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2981                 } else {
2982                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2983                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2984                 }
2985                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2986                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2987                 } else {
2988                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2989                 }
2990                 /*
2991                  * set the automatic mobility_base from kernel flag (by
2992                  * micchie)
2993                  */
2994                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
2995                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
2996                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
2997                 } else {
2998                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
2999                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3000                 }
3001                 /*
3002                  * set the automatic mobility_fasthandoff from kernel flag
3003                  * (by micchie)
3004                  */
3005                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3006                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3007                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3008                 } else {
3009                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3010                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3011                 }
3012         } else {
3013                 /*
3014                  * bind specific, make sure flags is off and add a new
3015                  * address structure to the sctp_addr_list inside the ep
3016                  * structure.
3017                  *
3018                  * We will need to allocate one and insert it at the head. The
3019                  * socketopt call can just insert new addresses in there as
3020                  * well. It will also have to do the embed scope kame hack
3021                  * too (before adding).
3022                  */
3023                 struct sctp_ifa *ifa;
3024                 struct sockaddr_storage store_sa;
3025
3026                 memset(&store_sa, 0, sizeof(store_sa));
3027                 if (addr->sa_family == AF_INET) {
3028                         struct sockaddr_in *sin;
3029
3030                         sin = (struct sockaddr_in *)&store_sa;
3031                         memcpy(sin, addr, sizeof(struct sockaddr_in));
3032                         sin->sin_port = 0;
3033                 } else if (addr->sa_family == AF_INET6) {
3034                         struct sockaddr_in6 *sin6;
3035
3036                         sin6 = (struct sockaddr_in6 *)&store_sa;
3037                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3038                         sin6->sin6_port = 0;
3039                 }
3040                 /*
3041                  * first find the interface with the bound address need to
3042                  * zero out the port to find the address! yuck! can't do
3043                  * this earlier since need port for sctp_pcb_findep()
3044                  */
3045                 if (sctp_ifap != NULL)
3046                         ifa = sctp_ifap;
3047                 else {
3048                         /*
3049                          * Note for BSD we hit here always other O/S's will
3050                          * pass things in via the sctp_ifap argument
3051                          * (Panda).
3052                          */
3053                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3054                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3055                 }
3056                 if (ifa == NULL) {
3057                         /* Can't find an interface with that address */
3058                         SCTP_INP_WUNLOCK(inp);
3059                         SCTP_INP_INFO_WUNLOCK();
3060                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3061                         return (EADDRNOTAVAIL);
3062                 }
3063                 if (addr->sa_family == AF_INET6) {
3064                         /* GAK, more FIXME IFA lock? */
3065                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3066                                 /* Can't bind a non-existent addr. */
3067                                 SCTP_INP_WUNLOCK(inp);
3068                                 SCTP_INP_INFO_WUNLOCK();
3069                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3070                                 return (EINVAL);
3071                         }
3072                 }
3073                 /* we're not bound all */
3074                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3075                 /* allow bindx() to send ASCONF's for binding changes */
3076                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3077                 /* clear automatic addr changes from kernel flag */
3078                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3079
3080                 /* add this address to the endpoint list */
3081                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3082                 if (error != 0) {
3083                         SCTP_INP_WUNLOCK(inp);
3084                         SCTP_INP_INFO_WUNLOCK();
3085                         return (error);
3086                 }
3087                 inp->laddr_count++;
3088         }
3089         /* find the bucket */
3090         if (port_reuse_active) {
3091                 /* Put it into tcp 1-2-1 hash */
3092                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport),
3093                     SCTP_BASE_INFO(hashtcpmark))];
3094                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3095         } else {
3096                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
3097                     SCTP_BASE_INFO(hashmark))];
3098         }
3099         /* put it in the bucket */
3100         LIST_INSERT_HEAD(head, inp, sctp_hash);
3101         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3102             head, ntohs(lport), port_reuse_active);
3103         /* set in the port */
3104         inp->sctp_lport = lport;
3105
3106         /* turn off just the unbound flag */
3107         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3108         SCTP_INP_WUNLOCK(inp);
3109         SCTP_INP_INFO_WUNLOCK();
3110         return (0);
3111 }
3112
3113
3114 static void
3115 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3116 {
3117         struct sctp_iterator *it, *nit;
3118
3119         /*
3120          * We enter with the only the ITERATOR_LOCK in place and a write
3121          * lock on the inp_info stuff.
3122          */
3123         it = sctp_it_ctl.cur_it;
3124         if (it && (it->vn != curvnet)) {
3125                 /* Its not looking at our VNET */
3126                 return;
3127         }
3128         if (it && (it->inp == inp)) {
3129                 /*
3130                  * This is tricky and we hold the iterator lock, but when it
3131                  * returns and gets the lock (when we release it) the
3132                  * iterator will try to operate on inp. We need to stop that
3133                  * from happening. But of course the iterator has a
3134                  * reference on the stcb and inp. We can mark it and it will
3135                  * stop.
3136                  *
3137                  * If its a single iterator situation, we set the end iterator
3138                  * flag. Otherwise we set the iterator to go to the next
3139                  * inp.
3140                  *
3141                  */
3142                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3143                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3144                 } else {
3145                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3146                 }
3147         }
3148         /*
3149          * Now go through and remove any single reference to our inp that
3150          * may be still pending on the list
3151          */
3152         SCTP_IPI_ITERATOR_WQ_LOCK();
3153         it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
3154         while (it) {
3155                 nit = TAILQ_NEXT(it, sctp_nxt_itr);
3156                 if (it->vn != curvnet) {
3157                         it = nit;
3158                         continue;
3159                 }
3160                 if (it->inp == inp) {
3161                         /* This one points to me is it inp specific? */
3162                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3163                                 /* Remove and free this one */
3164                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3165                                     it, sctp_nxt_itr);
3166                                 if (it->function_atend != NULL) {
3167                                         (*it->function_atend) (it->pointer, it->val);
3168                                 }
3169                                 SCTP_FREE(it, SCTP_M_ITER);
3170                         } else {
3171                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3172                                 if (it->inp) {
3173                                         SCTP_INP_INCR_REF(it->inp);
3174                                 }
3175                         }
3176                         /*
3177                          * When its put in the refcnt is incremented so decr
3178                          * it
3179                          */
3180                         SCTP_INP_DECR_REF(inp);
3181                 }
3182                 it = nit;
3183         }
3184         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3185 }
3186
3187 /* release sctp_inpcb unbind the port */
3188 void
3189 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3190 {
3191         /*
3192          * Here we free a endpoint. We must find it (if it is in the Hash
3193          * table) and remove it from there. Then we must also find it in the
3194          * overall list and remove it from there. After all removals are
3195          * complete then any timer has to be stopped. Then start the actual
3196          * freeing. a) Any local lists. b) Any associations. c) The hash of
3197          * all associations. d) finally the ep itself.
3198          */
3199         struct sctp_pcb *m;
3200         struct sctp_tcb *asoc, *nasoc;
3201         struct sctp_laddr *laddr, *nladdr;
3202         struct inpcb *ip_pcb;
3203         struct socket *so;
3204         int being_refed = 0;
3205         struct sctp_queued_to_read *sq;
3206
3207
3208         int cnt;
3209         sctp_sharedkey_t *shared_key;
3210
3211
3212 #ifdef SCTP_LOG_CLOSING
3213         sctp_log_closing(inp, NULL, 0);
3214 #endif
3215         SCTP_ITERATOR_LOCK();
3216         /* mark any iterators on the list or being processed */
3217         sctp_iterator_inp_being_freed(inp);
3218         SCTP_ITERATOR_UNLOCK();
3219         so = inp->sctp_socket;
3220         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3221                 /* been here before.. eeks.. get out of here */
3222                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3223 #ifdef SCTP_LOG_CLOSING
3224                 sctp_log_closing(inp, NULL, 1);
3225 #endif
3226                 return;
3227         }
3228         SCTP_ASOC_CREATE_LOCK(inp);
3229         SCTP_INP_INFO_WLOCK();
3230
3231         SCTP_INP_WLOCK(inp);
3232         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3233                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3234                 /* socket is gone, so no more wakeups allowed */
3235                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3236                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3237                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3238
3239         }
3240         /* First time through we have the socket lock, after that no more. */
3241         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3242             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3243
3244         if (inp->control) {
3245                 sctp_m_freem(inp->control);
3246                 inp->control = NULL;
3247         }
3248         if (inp->pkt) {
3249                 sctp_m_freem(inp->pkt);
3250                 inp->pkt = NULL;
3251         }
3252         m = &inp->sctp_ep;
3253         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3254                                          * here but I will be nice :> (i.e.
3255                                          * ip_pcb = ep;) */
3256         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3257                 int cnt_in_sd;
3258
3259                 cnt_in_sd = 0;
3260                 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3261                     asoc = nasoc) {
3262                         SCTP_TCB_LOCK(asoc);
3263                         nasoc = LIST_NEXT(asoc, sctp_tcblist);
3264                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3265                                 /* Skip guys being freed */
3266                                 cnt_in_sd++;
3267                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3268                                         /*
3269                                          * Special case - we did not start a
3270                                          * kill timer on the asoc due to it
3271                                          * was not closed. So go ahead and
3272                                          * start it now.
3273                                          */
3274                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3275                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3276                                 }
3277                                 SCTP_TCB_UNLOCK(asoc);
3278                                 continue;
3279                         }
3280                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3281                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3282                             (asoc->asoc.total_output_queue_size == 0)) {
3283                                 /*
3284                                  * If we have data in queue, we don't want
3285                                  * to just free since the app may have done,
3286                                  * send()/close or connect/send/close. And
3287                                  * it wants the data to get across first.
3288                                  */
3289                                 /* Just abandon things in the front states */
3290                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3291                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3292                                         cnt_in_sd++;
3293                                 }
3294                                 continue;
3295                         }
3296                         /* Disconnect the socket please */
3297                         asoc->sctp_socket = NULL;
3298                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3299                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3300                             (asoc->asoc.control_pdapi) ||
3301                             (asoc->asoc.size_on_all_streams > 0) ||
3302                             (so && (so->so_rcv.sb_cc > 0))
3303                             ) {
3304                                 /* Left with Data unread */
3305                                 struct mbuf *op_err;
3306
3307                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3308                                     0, M_DONTWAIT, 1, MT_DATA);
3309                                 if (op_err) {
3310                                         /* Fill in the user initiated abort */
3311                                         struct sctp_paramhdr *ph;
3312                                         uint32_t *ippp;
3313
3314                                         SCTP_BUF_LEN(op_err) =
3315                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3316                                         ph = mtod(op_err,
3317                                             struct sctp_paramhdr *);
3318                                         ph->param_type = htons(
3319                                             SCTP_CAUSE_USER_INITIATED_ABT);
3320                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3321                                         ippp = (uint32_t *) (ph + 1);
3322                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3323                                 }
3324                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3325 #if defined(SCTP_PANIC_ON_ABORT)
3326                                 panic("inpcb_free does an abort");
3327 #endif
3328                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3329                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3330                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3331                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3332                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3333                                 }
3334                                 if (sctp_free_assoc(inp, asoc,
3335                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3336                                         cnt_in_sd++;
3337                                 }
3338                                 continue;
3339                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3340                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3341                                     (asoc->asoc.stream_queue_cnt == 0)
3342                             ) {
3343                                 if (asoc->asoc.locked_on_sending) {
3344                                         goto abort_anyway;
3345                                 }
3346                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3347                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3348                                         /*
3349                                          * there is nothing queued to send,
3350                                          * so I send shutdown
3351                                          */
3352                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3353                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3354                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3355                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3356                                         }
3357                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3358                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3359                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3360                                             asoc->asoc.primary_destination);
3361                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3362                                             asoc->asoc.primary_destination);
3363                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3364                                 }
3365                         } else {
3366                                 /* mark into shutdown pending */
3367                                 struct sctp_stream_queue_pending *sp;
3368
3369                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3370                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3371                                     asoc->asoc.primary_destination);
3372                                 if (asoc->asoc.locked_on_sending) {
3373                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3374                                             sctp_streamhead);
3375                                         if (sp == NULL) {
3376                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3377                                                     asoc->asoc.locked_on_sending,
3378                                                     asoc->asoc.locked_on_sending->stream_no);
3379                                         } else {
3380                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3381                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3382                                         }
3383                                 }
3384                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3385                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3386                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3387                                         struct mbuf *op_err;
3388
3389                         abort_anyway:
3390                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3391                                             0, M_DONTWAIT, 1, MT_DATA);
3392                                         if (op_err) {
3393                                                 /*
3394                                                  * Fill in the user
3395                                                  * initiated abort
3396                                                  */
3397                                                 struct sctp_paramhdr *ph;
3398                                                 uint32_t *ippp;
3399
3400                                                 SCTP_BUF_LEN(op_err) =
3401                                                     (sizeof(struct sctp_paramhdr) +
3402                                                     sizeof(uint32_t));
3403                                                 ph = mtod(op_err,
3404                                                     struct sctp_paramhdr *);
3405                                                 ph->param_type = htons(
3406                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3407                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3408                                                 ippp = (uint32_t *) (ph + 1);
3409                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3410                                         }
3411                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3412 #if defined(SCTP_PANIC_ON_ABORT)
3413                                         panic("inpcb_free does an abort");
3414 #endif
3415
3416                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3417                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3418                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3419                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3420                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3421                                         }
3422                                         if (sctp_free_assoc(inp, asoc,
3423                                             SCTP_PCBFREE_NOFORCE,
3424                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3425                                                 cnt_in_sd++;
3426                                         }
3427                                         continue;
3428                                 } else {
3429                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3430                                 }
3431                         }
3432                         cnt_in_sd++;
3433                         SCTP_TCB_UNLOCK(asoc);
3434                 }
3435                 /* now is there some left in our SHUTDOWN state? */
3436                 if (cnt_in_sd) {
3437 #ifdef SCTP_LOG_CLOSING
3438                         sctp_log_closing(inp, NULL, 2);
3439 #endif
3440                         inp->sctp_socket = NULL;
3441                         SCTP_INP_WUNLOCK(inp);
3442                         SCTP_ASOC_CREATE_UNLOCK(inp);
3443                         SCTP_INP_INFO_WUNLOCK();
3444                         return;
3445                 }
3446         }
3447         inp->sctp_socket = NULL;
3448         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3449             SCTP_PCB_FLAGS_UNBOUND) {
3450                 /*
3451                  * ok, this guy has been bound. It's port is somewhere in
3452                  * the SCTP_BASE_INFO(hash table). Remove it!
3453                  */
3454                 LIST_REMOVE(inp, sctp_hash);
3455                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3456         }
3457         /*
3458          * If there is a timer running to kill us, forget it, since it may
3459          * have a contest on the INP lock.. which would cause us to die ...
3460          */
3461         cnt = 0;
3462         for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
3463             asoc = nasoc) {
3464                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3465                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3466                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3467                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3468                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3469                         }
3470                         cnt++;
3471                         continue;
3472                 }
3473                 /* Free associations that are NOT killing us */
3474                 SCTP_TCB_LOCK(asoc);
3475                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3476                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3477                         struct mbuf *op_err;
3478                         uint32_t *ippp;
3479
3480                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3481                             0, M_DONTWAIT, 1, MT_DATA);
3482                         if (op_err) {
3483                                 /* Fill in the user initiated abort */
3484                                 struct sctp_paramhdr *ph;
3485
3486                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3487                                     sizeof(uint32_t));
3488                                 ph = mtod(op_err, struct sctp_paramhdr *);
3489                                 ph->param_type = htons(
3490                                     SCTP_CAUSE_USER_INITIATED_ABT);
3491                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3492                                 ippp = (uint32_t *) (ph + 1);
3493                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3494
3495                         }
3496                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3497 #if defined(SCTP_PANIC_ON_ABORT)
3498                         panic("inpcb_free does an abort");
3499 #endif
3500                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3501                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3502                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3503                         cnt++;
3504                         SCTP_TCB_UNLOCK(asoc);
3505                         continue;
3506                 }
3507                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3508                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3509                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3510                 }
3511                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3512                         cnt++;
3513                 }
3514         }
3515         if (cnt) {
3516                 /* Ok we have someone out there that will kill us */
3517                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3518 #ifdef SCTP_LOG_CLOSING
3519                 sctp_log_closing(inp, NULL, 3);
3520 #endif
3521                 SCTP_INP_WUNLOCK(inp);
3522                 SCTP_ASOC_CREATE_UNLOCK(inp);
3523                 SCTP_INP_INFO_WUNLOCK();
3524                 return;
3525         }
3526         if (SCTP_INP_LOCK_CONTENDED(inp))
3527                 being_refed++;
3528         if (SCTP_INP_READ_CONTENDED(inp))
3529                 being_refed++;
3530         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3531                 being_refed++;
3532
3533         if ((inp->refcount) ||
3534             (being_refed) ||
3535             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3536                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3537 #ifdef SCTP_LOG_CLOSING
3538                 sctp_log_closing(inp, NULL, 4);
3539 #endif
3540                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3541                 SCTP_INP_WUNLOCK(inp);
3542                 SCTP_ASOC_CREATE_UNLOCK(inp);
3543                 SCTP_INP_INFO_WUNLOCK();
3544                 return;
3545         }
3546         inp->sctp_ep.signature_change.type = 0;
3547         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3548         /*
3549          * Remove it from the list .. last thing we need a lock for.
3550          */
3551         LIST_REMOVE(inp, sctp_list);
3552         SCTP_INP_WUNLOCK(inp);
3553         SCTP_ASOC_CREATE_UNLOCK(inp);
3554         SCTP_INP_INFO_WUNLOCK();
3555         /*
3556          * Now we release all locks. Since this INP cannot be found anymore
3557          * except possbily by the kill timer that might be running. We call
3558          * the drain function here. It should hit the case were it sees the
3559          * ACTIVE flag cleared and exit out freeing us to proceed and
3560          * destroy everything.
3561          */
3562         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3563                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3564         } else {
3565                 /* Probably un-needed */
3566                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3567         }
3568
3569 #ifdef SCTP_LOG_CLOSING
3570         sctp_log_closing(inp, NULL, 5);
3571 #endif
3572
3573
3574         if ((inp->sctp_asocidhash) != NULL) {
3575                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3576                 inp->sctp_asocidhash = NULL;
3577         }
3578         /* sa_ignore FREED_MEMORY */
3579         while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
3580                 /* Its only abandoned if it had data left */
3581                 if (sq->length)
3582                         SCTP_STAT_INCR(sctps_left_abandon);
3583
3584                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3585                 sctp_free_remote_addr(sq->whoFrom);
3586                 if (so)
3587                         so->so_rcv.sb_cc -= sq->length;
3588                 if (sq->data) {
3589                         sctp_m_freem(sq->data);
3590                         sq->data = NULL;
3591                 }
3592                 /*
3593                  * no need to free the net count, since at this point all
3594                  * assoc's are gone.
3595                  */
3596                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3597                 SCTP_DECR_READQ_COUNT();
3598         }
3599         /* Now the sctp_pcb things */
3600         /*
3601          * free each asoc if it is not already closed/free. we can't use the
3602          * macro here since le_next will get freed as part of the
3603          * sctp_free_assoc() call.
3604          */
3605         cnt = 0;
3606         if (so) {
3607 #ifdef IPSEC
3608                 ipsec_delete_pcbpolicy(ip_pcb);
3609 #endif                          /* IPSEC */
3610
3611                 /* Unlocks not needed since the socket is gone now */
3612         }
3613         if (ip_pcb->inp_options) {
3614                 (void)sctp_m_free(ip_pcb->inp_options);
3615                 ip_pcb->inp_options = 0;
3616         }
3617         if (ip_pcb->inp_moptions) {
3618                 inp_freemoptions(ip_pcb->inp_moptions);
3619                 ip_pcb->inp_moptions = 0;
3620         }
3621 #ifdef INET6
3622         if (ip_pcb->inp_vflag & INP_IPV6) {
3623                 struct in6pcb *in6p;
3624
3625                 in6p = (struct in6pcb *)inp;
3626                 ip6_freepcbopts(in6p->in6p_outputopts);
3627         }
3628 #endif                          /* INET6 */
3629         ip_pcb->inp_vflag = 0;
3630         /* free up authentication fields */
3631         if (inp->sctp_ep.local_auth_chunks != NULL)
3632                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3633         if (inp->sctp_ep.local_hmacs != NULL)
3634                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3635
3636         shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3637         while (shared_key) {
3638                 LIST_REMOVE(shared_key, next);
3639                 sctp_free_sharedkey(shared_key);
3640                 /* sa_ignore FREED_MEMORY */
3641                 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
3642         }
3643
3644         /*
3645          * if we have an address list the following will free the list of
3646          * ifaddr's that are set into this ep. Again macro limitations here,
3647          * since the LIST_FOREACH could be a bad idea.
3648          */
3649         for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
3650             laddr = nladdr) {
3651                 nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
3652                 sctp_remove_laddr(laddr);
3653         }
3654
3655 #ifdef SCTP_TRACK_FREED_ASOCS
3656         /* TEMP CODE */
3657         for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
3658             asoc = nasoc) {
3659                 nasoc = LIST_NEXT(asoc, sctp_tcblist);
3660                 LIST_REMOVE(asoc, sctp_tcblist);
3661                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3662                 SCTP_DECR_ASOC_COUNT();
3663         }
3664         /* *** END TEMP CODE *** */
3665 #endif
3666         /* Now lets see about freeing the EP hash table. */
3667         if (inp->sctp_tcbhash != NULL) {
3668                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3669                 inp->sctp_tcbhash = NULL;
3670         }
3671         /* Now we must put the ep memory back into the zone pool */
3672         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3673         SCTP_INP_LOCK_DESTROY(inp);
3674         SCTP_INP_READ_DESTROY(inp);
3675         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3676         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3677         SCTP_DECR_EP_COUNT();
3678 }
3679
3680
3681 struct sctp_nets *
3682 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3683 {
3684         struct sctp_nets *net;
3685
3686         /* locate the address */
3687         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3688                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3689                         return (net);
3690         }
3691         return (NULL);
3692 }
3693
3694
3695 int
3696 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3697 {
3698         struct sctp_ifa *sctp_ifa;
3699
3700         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3701         if (sctp_ifa) {
3702                 return (1);
3703         } else {
3704                 return (0);
3705         }
3706 }
3707
3708 /*
3709  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3710  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3711  * stats of stuff.
3712  */
3713 int
3714 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3715     int set_scope, int from)
3716 {
3717         /*
3718          * The following is redundant to the same lines in the
3719          * sctp_aloc_assoc() but is needed since other's call the add
3720          * address function
3721          */
3722         struct sctp_nets *net, *netfirst;
3723         int addr_inscope;
3724
3725         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3726             from);
3727         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3728
3729         netfirst = sctp_findnet(stcb, newaddr);
3730         if (netfirst) {
3731                 /*
3732                  * Lie and return ok, we don't want to make the association
3733                  * go away for this behavior. It will happen in the TCP
3734                  * model in a connected socket. It does not reach the hash
3735                  * table until after the association is built so it can't be
3736                  * found. Mark as reachable, since the initial creation will
3737                  * have been cleared and the NOT_IN_ASSOC flag will have
3738                  * been added... and we don't want to end up removing it
3739                  * back out.
3740                  */
3741                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3742                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3743                             SCTP_ADDR_UNCONFIRMED);
3744                 } else {
3745                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3746                 }
3747
3748                 return (0);
3749         }
3750         addr_inscope = 1;
3751         if (newaddr->sa_family == AF_INET) {
3752                 struct sockaddr_in *sin;
3753
3754                 sin = (struct sockaddr_in *)newaddr;
3755                 if (sin->sin_addr.s_addr == 0) {
3756                         /* Invalid address */
3757                         return (-1);
3758                 }
3759                 /* zero out the bzero area */
3760                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3761
3762                 /* assure len is set */
3763                 sin->sin_len = sizeof(struct sockaddr_in);
3764                 if (set_scope) {
3765 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3766                         stcb->ipv4_local_scope = 1;
3767 #else
3768                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3769                                 stcb->asoc.ipv4_local_scope = 1;
3770                         }
3771 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3772                 } else {
3773                         /* Validate the address is in scope */
3774                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3775                             (stcb->asoc.ipv4_local_scope == 0)) {
3776                                 addr_inscope = 0;
3777                         }
3778                 }
3779 #ifdef INET6
3780         } else if (newaddr->sa_family == AF_INET6) {
3781                 struct sockaddr_in6 *sin6;
3782
3783                 sin6 = (struct sockaddr_in6 *)newaddr;
3784                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3785                         /* Invalid address */
3786                         return (-1);
3787                 }
3788                 /* assure len is set */
3789                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3790                 if (set_scope) {
3791                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3792                                 stcb->asoc.loopback_scope = 1;
3793                                 stcb->asoc.local_scope = 0;
3794                                 stcb->asoc.ipv4_local_scope = 1;
3795                                 stcb->asoc.site_scope = 1;
3796                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3797                                 /*
3798                                  * If the new destination is a LINK_LOCAL we
3799                                  * must have common site scope. Don't set
3800                                  * the local scope since we may not share
3801                                  * all links, only loopback can do this.
3802                                  * Links on the local network would also be
3803                                  * on our private network for v4 too.
3804                                  */
3805                                 stcb->asoc.ipv4_local_scope = 1;
3806                                 stcb->asoc.site_scope = 1;
3807                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3808                                 /*
3809                                  * If the new destination is SITE_LOCAL then
3810                                  * we must have site scope in common.
3811                                  */
3812                                 stcb->asoc.site_scope = 1;
3813                         }
3814                 } else {
3815                         /* Validate the address is in scope */
3816                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3817                             (stcb->asoc.loopback_scope == 0)) {
3818                                 addr_inscope = 0;
3819                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3820                             (stcb->asoc.local_scope == 0)) {
3821                                 addr_inscope = 0;
3822                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3823                             (stcb->asoc.site_scope == 0)) {
3824                                 addr_inscope = 0;
3825                         }
3826                 }
3827 #endif
3828         } else {
3829                 /* not supported family type */
3830                 return (-1);
3831         }
3832         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3833         if (net == NULL) {
3834                 return (-1);
3835         }
3836         SCTP_INCR_RADDR_COUNT();
3837         bzero(net, sizeof(*net));
3838         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3839         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3840         if (newaddr->sa_family == AF_INET) {
3841                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3842         } else if (newaddr->sa_family == AF_INET6) {
3843                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3844         }
3845         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3846         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3847                 stcb->asoc.loopback_scope = 1;
3848                 stcb->asoc.ipv4_local_scope = 1;
3849                 stcb->asoc.local_scope = 0;
3850                 stcb->asoc.site_scope = 1;
3851                 addr_inscope = 1;
3852         }
3853         net->failure_threshold = stcb->asoc.def_net_failure;
3854         if (addr_inscope == 0) {
3855                 net->dest_state = (SCTP_ADDR_REACHABLE |
3856                     SCTP_ADDR_OUT_OF_SCOPE);
3857         } else {
3858                 if (from == SCTP_ADDR_IS_CONFIRMED)
3859                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3860                         net->dest_state = SCTP_ADDR_REACHABLE;
3861                 else
3862                         net->dest_state = SCTP_ADDR_REACHABLE |
3863                             SCTP_ADDR_UNCONFIRMED;
3864         }
3865         /*
3866          * We set this to 0, the timer code knows that this means its an
3867          * initial value
3868          */
3869         net->RTO = 0;
3870         net->RTO_measured = 0;
3871         stcb->asoc.numnets++;
3872         *(&net->ref_count) = 1;
3873         net->tos_flowlabel = 0;
3874         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3875                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3876         } else {
3877                 net->port = 0;
3878         }
3879 #ifdef INET
3880         if (newaddr->sa_family == AF_INET)
3881                 net->tos_flowlabel = stcb->asoc.default_tos;
3882 #endif
3883 #ifdef INET6
3884         if (newaddr->sa_family == AF_INET6)
3885                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3886 #endif
3887         /* Init the timer structure */
3888         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3889         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3890         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3891
3892         /* Now generate a route for this guy */
3893 #ifdef INET6
3894         /* KAME hack: embed scopeid */
3895         if (newaddr->sa_family == AF_INET6) {
3896                 struct sockaddr_in6 *sin6;
3897
3898                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3899                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3900                 sin6->sin6_scope_id = 0;
3901         }
3902 #endif
3903         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3904
3905         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3906                 /* Get source address */
3907                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3908                     stcb,
3909                     (sctp_route_t *) & net->ro,
3910                     net,
3911                     0,
3912                     stcb->asoc.vrf_id);
3913                 /* Now get the interface MTU */
3914                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3915                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3916                 } else {
3917                         net->mtu = 0;
3918                 }
3919                 if (net->mtu == 0) {
3920                         /* Huh ?? */
3921                         net->mtu = SCTP_DEFAULT_MTU;
3922                 } else {
3923                         uint32_t rmtu;
3924
3925                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3926                         if (rmtu == 0) {
3927                                 /*
3928                                  * Start things off to match mtu of
3929                                  * interface please.
3930                                  */
3931                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3932                                     net->ro.ro_rt, net->mtu);
3933                         } else {
3934                                 /*
3935                                  * we take the route mtu over the interface,
3936                                  * since the route may be leading out the
3937                                  * loopback, or a different interface.
3938                                  */
3939                                 net->mtu = rmtu;
3940                         }
3941                 }
3942                 if (from == SCTP_ALLOC_ASOC) {
3943                         stcb->asoc.smallest_mtu = net->mtu;
3944                 }
3945         } else {
3946                 net->mtu = stcb->asoc.smallest_mtu;
3947         }
3948 #ifdef INET6
3949         if (newaddr->sa_family == AF_INET6) {
3950                 struct sockaddr_in6 *sin6;
3951
3952                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3953                 (void)sa6_recoverscope(sin6);
3954         }
3955 #endif
3956         if (net->port) {
3957                 net->mtu -= sizeof(struct udphdr);
3958         }
3959         if (stcb->asoc.smallest_mtu > net->mtu) {
3960                 stcb->asoc.smallest_mtu = net->mtu;
3961         }
3962         /* JRS - Use the congestion control given in the CC module */
3963         stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net);
3964
3965         /*
3966          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3967          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3968          */
3969         net->find_pseudo_cumack = 1;
3970         net->find_rtx_pseudo_cumack = 1;
3971         net->src_addr_selected = 0;
3972         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3973         if (net->ro.ro_rt == NULL) {
3974                 /* Since we have no route put it at the back */
3975                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3976         } else if (netfirst == NULL) {
3977                 /* We are the first one in the pool. */
3978                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3979         } else if (netfirst->ro.ro_rt == NULL) {
3980                 /*
3981                  * First one has NO route. Place this one ahead of the first
3982                  * one.
3983                  */
3984                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3985         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3986                 /*
3987                  * This one has a different interface than the one at the
3988                  * top of the list. Place it ahead.
3989                  */
3990                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3991         } else {
3992                 /*
3993                  * Ok we have the same interface as the first one. Move
3994                  * forward until we find either a) one with a NULL route...
3995                  * insert ahead of that b) one with a different ifp.. insert
3996                  * after that. c) end of the list.. insert at the tail.
3997                  */
3998                 struct sctp_nets *netlook;
3999
4000                 do {
4001                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4002                         if (netlook == NULL) {
4003                                 /* End of the list */
4004                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4005                                 break;
4006                         } else if (netlook->ro.ro_rt == NULL) {
4007                                 /* next one has NO route */
4008                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4009                                 break;
4010                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4011                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4012                                     net, sctp_next);
4013                                 break;
4014                         }
4015                         /* Shift forward */
4016                         netfirst = netlook;
4017                 } while (netlook != NULL);
4018         }
4019
4020         /* got to have a primary set */
4021         if (stcb->asoc.primary_destination == 0) {
4022                 stcb->asoc.primary_destination = net;
4023         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4024                     (net->ro.ro_rt) &&
4025             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4026                 /* No route to current primary adopt new primary */
4027                 stcb->asoc.primary_destination = net;
4028         }
4029         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
4030             net);
4031         /* Validate primary is first */
4032         net = TAILQ_FIRST(&stcb->asoc.nets);
4033         if ((net != stcb->asoc.primary_destination) &&
4034             (stcb->asoc.primary_destination)) {
4035                 /*
4036                  * first one on the list is NOT the primary sctp_cmpaddr()
4037                  * is much more efficent if the primary is the first on the
4038                  * list, make it so.
4039                  */
4040                 TAILQ_REMOVE(&stcb->asoc.nets,
4041                     stcb->asoc.primary_destination, sctp_next);
4042                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4043                     stcb->asoc.primary_destination, sctp_next);
4044         }
4045         return (0);
4046 }
4047
4048
4049 static uint32_t
4050 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4051 {
4052         uint32_t id;
4053         struct sctpasochead *head;
4054         struct sctp_tcb *lstcb;
4055
4056         SCTP_INP_WLOCK(inp);
4057 try_again:
4058         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4059                 /* TSNH */
4060                 SCTP_INP_WUNLOCK(inp);
4061                 return (0);
4062         }
4063         /*
4064          * We don't allow assoc id to be 0, this is needed otherwise if the
4065          * id were to wrap we would have issues with some socket options.
4066          */
4067         if (inp->sctp_associd_counter == 0) {
4068                 inp->sctp_associd_counter++;
4069         }
4070         id = inp->sctp_associd_counter;
4071         inp->sctp_associd_counter++;
4072         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4073         if (lstcb) {
4074                 goto try_again;
4075         }
4076         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4077         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4078         stcb->asoc.in_asocid_hash = 1;
4079         SCTP_INP_WUNLOCK(inp);
4080         return id;
4081 }
4082
4083 /*
4084  * allocate an association and add it to the endpoint. The caller must be
4085  * careful to add all additional addresses once they are know right away or
4086  * else the assoc will be may experience a blackout scenario.
4087  */
4088 struct sctp_tcb *
4089 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4090     int *error, uint32_t override_tag, uint32_t vrf_id,
4091     struct thread *p
4092 )
4093 {
4094         /* note the p argument is only valid in unbound sockets */
4095
4096         struct sctp_tcb *stcb;
4097         struct sctp_association *asoc;
4098         struct sctpasochead *head;
4099         uint16_t rport;
4100         int err;
4101
4102         /*
4103          * Assumption made here: Caller has done a
4104          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4105          * address does not exist already.
4106          */
4107         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4108                 /* Hit max assoc, sorry no more */
4109                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4110                 *error = ENOBUFS;
4111                 return (NULL);
4112         }
4113         if (firstaddr == NULL) {
4114                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4115                 *error = EINVAL;
4116                 return (NULL);
4117         }
4118         SCTP_INP_RLOCK(inp);
4119         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4120             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4121             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4122                 /*
4123                  * If its in the TCP pool, its NOT allowed to create an
4124                  * association. The parent listener needs to call
4125                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4126                  * off, or connected one does this.. its an error.
4127                  */
4128                 SCTP_INP_RUNLOCK(inp);
4129                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4130                 *error = EINVAL;
4131                 return (NULL);
4132         }
4133         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4134 #ifdef SCTP_DEBUG
4135         if (firstaddr) {
4136                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4137                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4138                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4139         } else {
4140                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4141         }
4142 #endif                          /* SCTP_DEBUG */
4143         if (firstaddr->sa_family == AF_INET) {
4144                 struct sockaddr_in *sin;
4145
4146                 sin = (struct sockaddr_in *)firstaddr;
4147                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4148                         /* Invalid address */
4149                         SCTP_INP_RUNLOCK(inp);
4150                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4151                         *error = EINVAL;
4152                         return (NULL);
4153                 }
4154                 rport = sin->sin_port;
4155         } else if (firstaddr->sa_family == AF_INET6) {
4156                 struct sockaddr_in6 *sin6;
4157
4158                 sin6 = (struct sockaddr_in6 *)firstaddr;
4159                 if ((sin6->sin6_port == 0) ||
4160                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4161                         /* Invalid address */
4162                         SCTP_INP_RUNLOCK(inp);
4163                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4164                         *error = EINVAL;
4165                         return (NULL);
4166                 }
4167                 rport = sin6->sin6_port;
4168         } else {
4169                 /* not supported family type */
4170                 SCTP_INP_RUNLOCK(inp);
4171                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4172                 *error = EINVAL;
4173                 return (NULL);
4174         }
4175         SCTP_INP_RUNLOCK(inp);
4176         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4177                 /*
4178                  * If you have not performed a bind, then we need to do the
4179                  * ephemerial bind for you.
4180                  */
4181                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4182                     (struct sockaddr *)NULL,
4183                     (struct sctp_ifa *)NULL,
4184                     p
4185                     ))) {
4186                         /* bind error, probably perm */
4187                         *error = err;
4188                         return (NULL);
4189                 }
4190         }
4191         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4192         if (stcb == NULL) {
4193                 /* out of memory? */
4194                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4195                 *error = ENOMEM;
4196                 return (NULL);
4197         }
4198         SCTP_INCR_ASOC_COUNT();
4199
4200         bzero(stcb, sizeof(*stcb));
4201         asoc = &stcb->asoc;
4202
4203         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4204         SCTP_TCB_LOCK_INIT(stcb);
4205         SCTP_TCB_SEND_LOCK_INIT(stcb);
4206         stcb->rport = rport;
4207         /* setup back pointer's */
4208         stcb->sctp_ep = inp;
4209         stcb->sctp_socket = inp->sctp_socket;
4210         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4211                 /* failed */
4212                 SCTP_TCB_LOCK_DESTROY(stcb);
4213                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4214                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4215                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4216                 SCTP_DECR_ASOC_COUNT();
4217                 *error = err;
4218                 return (NULL);
4219         }
4220         /* and the port */
4221         SCTP_INP_INFO_WLOCK();
4222         SCTP_INP_WLOCK(inp);
4223         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4224                 /* inpcb freed while alloc going on */
4225                 SCTP_TCB_LOCK_DESTROY(stcb);
4226                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4227                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4228                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4229                 SCTP_INP_WUNLOCK(inp);
4230                 SCTP_INP_INFO_WUNLOCK();
4231                 SCTP_DECR_ASOC_COUNT();
4232                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4233                 *error = EINVAL;
4234                 return (NULL);
4235         }
4236         SCTP_TCB_LOCK(stcb);
4237
4238         /* now that my_vtag is set, add it to the hash */
4239         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4240         /* put it in the bucket in the vtag hash of assoc's for the system */
4241         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4242         SCTP_INP_INFO_WUNLOCK();
4243
4244         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4245                 /* failure.. memory error? */
4246                 if (asoc->strmout) {
4247                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4248                         asoc->strmout = NULL;
4249                 }
4250                 if (asoc->mapping_array) {
4251                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4252                         asoc->mapping_array = NULL;
4253                 }
4254                 if (asoc->nr_mapping_array) {
4255                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4256                         asoc->nr_mapping_array = NULL;
4257                 }
4258                 SCTP_DECR_ASOC_COUNT();
4259                 SCTP_TCB_LOCK_DESTROY(stcb);
4260                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4261                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4262                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4263                 SCTP_INP_WUNLOCK(inp);
4264                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4265                 *error = ENOBUFS;
4266                 return (NULL);
4267         }
4268         /* Init all the timers */
4269         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4270         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4271         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4272         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4273         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4274         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4275         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4276         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4277
4278         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4279         /* now file the port under the hash as well */
4280         if (inp->sctp_tcbhash != NULL) {
4281                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4282                     inp->sctp_hashmark)];
4283                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4284         }
4285         SCTP_INP_WUNLOCK(inp);
4286         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4287         return (stcb);
4288 }
4289
4290
4291 void
4292 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4293 {
4294         struct sctp_association *asoc;
4295
4296         asoc = &stcb->asoc;
4297         asoc->numnets--;
4298         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4299         if (net == asoc->primary_destination) {
4300                 /* Reset primary */
4301                 struct sctp_nets *lnet;
4302
4303                 lnet = TAILQ_FIRST(&asoc->nets);
4304                 /*
4305                  * Mobility adaptation Ideally, if deleted destination is
4306                  * the primary, it becomes a fast retransmission trigger by
4307                  * the subsequent SET PRIMARY. (by micchie)
4308                  */
4309                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4310                     SCTP_MOBILITY_BASE) ||
4311                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4312                     SCTP_MOBILITY_FASTHANDOFF)) {
4313                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4314                         if (asoc->deleted_primary != NULL) {
4315                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4316                                 goto out;
4317                         }
4318                         asoc->deleted_primary = net;
4319                         atomic_add_int(&net->ref_count, 1);
4320                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4321                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4322                         sctp_mobility_feature_on(stcb->sctp_ep,
4323                             SCTP_MOBILITY_PRIM_DELETED);
4324                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4325                             stcb->sctp_ep, stcb, NULL);
4326                 }
4327 out:
4328                 /* Try to find a confirmed primary */
4329                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4330         }
4331         if (net == asoc->last_data_chunk_from) {
4332                 /* Reset primary */
4333                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4334         }
4335         if (net == asoc->last_control_chunk_from) {
4336                 /* Clear net */
4337                 asoc->last_control_chunk_from = NULL;
4338         }
4339         sctp_free_remote_addr(net);
4340 }
4341
4342 /*
4343  * remove a remote endpoint address from an association, it will fail if the
4344  * address does not exist.
4345  */
4346 int
4347 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4348 {
4349         /*
4350          * Here we need to remove a remote address. This is quite simple, we
4351          * first find it in the list of address for the association
4352          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4353          * on that item. Note we do not allow it to be removed if there are
4354          * no other addresses.
4355          */
4356         struct sctp_association *asoc;
4357         struct sctp_nets *net, *net_tmp;
4358
4359         asoc = &stcb->asoc;
4360
4361         /* locate the address */
4362         for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
4363                 net_tmp = TAILQ_NEXT(net, sctp_next);
4364                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4365                         continue;
4366                 }
4367                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4368                     remaddr)) {
4369                         /* we found the guy */
4370                         if (asoc->numnets < 2) {
4371                                 /* Must have at LEAST two remote addresses */
4372                                 return (-1);
4373                         } else {
4374                                 sctp_remove_net(stcb, net);
4375                                 return (0);
4376                         }
4377                 }
4378         }
4379         /* not found. */
4380         return (-2);
4381 }
4382
4383 void
4384 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4385 {
4386         struct sctpvtaghead *chain;
4387         struct sctp_tagblock *twait_block;
4388         int found = 0;
4389         int i;
4390
4391         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4392         if (!LIST_EMPTY(chain)) {
4393                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4394                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4395                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4396                                     (twait_block->vtag_block[i].lport == lport) &&
4397                                     (twait_block->vtag_block[i].rport == rport)) {
4398                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4399                                         twait_block->vtag_block[i].v_tag = 0;
4400                                         twait_block->vtag_block[i].lport = 0;
4401                                         twait_block->vtag_block[i].rport = 0;
4402                                         found = 1;
4403                                         break;
4404                                 }
4405                         }
4406                         if (found)
4407                                 break;
4408                 }
4409         }
4410 }
4411
4412 int
4413 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4414 {
4415         struct sctpvtaghead *chain;
4416         struct sctp_tagblock *twait_block;
4417         int found = 0;
4418         int i;
4419
4420         SCTP_INP_INFO_WLOCK();
4421         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4422         if (!LIST_EMPTY(chain)) {
4423                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4424                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4425                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4426                                     (twait_block->vtag_block[i].lport == lport) &&
4427                                     (twait_block->vtag_block[i].rport == rport)) {
4428                                         found = 1;
4429                                         break;
4430                                 }
4431                         }
4432                         if (found)
4433                                 break;
4434                 }
4435         }
4436         SCTP_INP_INFO_WUNLOCK();
4437         return (found);
4438 }
4439
4440
4441 void
4442 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4443 {
4444         struct sctpvtaghead *chain;
4445         struct sctp_tagblock *twait_block;
4446         struct timeval now;
4447         int set, i;
4448
4449         if (time == 0) {
4450                 /* Its disabled */
4451                 return;
4452         }
4453         (void)SCTP_GETTIME_TIMEVAL(&now);
4454         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4455         set = 0;
4456         if (!LIST_EMPTY(chain)) {
4457                 /* Block(s) present, lets find space, and expire on the fly */
4458                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4459                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4460                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4461                                     !set) {
4462                                         twait_block->vtag_block[i].tv_sec_at_expire =
4463                                             now.tv_sec + time;
4464                                         twait_block->vtag_block[i].v_tag = tag;
4465                                         twait_block->vtag_block[i].lport = lport;
4466                                         twait_block->vtag_block[i].rport = rport;
4467                                         set = 1;
4468                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4469                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4470                                         /* Audit expires this guy */
4471                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4472                                         twait_block->vtag_block[i].v_tag = 0;
4473                                         twait_block->vtag_block[i].lport = 0;
4474                                         twait_block->vtag_block[i].rport = 0;
4475                                         if (set == 0) {
4476                                                 /* Reuse it for my new tag */
4477                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4478                                                 twait_block->vtag_block[i].v_tag = tag;
4479                                                 twait_block->vtag_block[i].lport = lport;
4480                                                 twait_block->vtag_block[i].rport = rport;
4481                                                 set = 1;
4482                                         }
4483                                 }
4484                         }
4485                         if (set) {
4486                                 /*
4487                                  * We only do up to the block where we can
4488                                  * place our tag for audits
4489                                  */
4490                                 break;
4491                         }
4492                 }
4493         }
4494         /* Need to add a new block to chain */
4495         if (!set) {
4496                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4497                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4498                 if (twait_block == NULL) {
4499 #ifdef INVARIANTS
4500                         panic("Can not alloc tagblock");
4501 #endif
4502                         return;
4503                 }
4504                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4505                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4506                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4507                 twait_block->vtag_block[0].v_tag = tag;
4508                 twait_block->vtag_block[0].lport = lport;
4509                 twait_block->vtag_block[0].rport = rport;
4510         }
4511 }
4512
4513
4514
4515 /*-
4516  * Free the association after un-hashing the remote port. This
4517  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4518  * expect that the input to this function IS a locked TCB.
4519  * It will return 0, if it did NOT destroy the association (instead
4520  * it unlocks it. It will return NON-zero if it either destroyed the
4521  * association OR the association is already destroyed.
4522  */
4523 int
4524 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4525 {
4526         int i;
4527         struct sctp_association *asoc;
4528         struct sctp_nets *net, *prev;
4529         struct sctp_laddr *laddr;
4530         struct sctp_tmit_chunk *chk;
4531         struct sctp_asconf_addr *aparam;
4532         struct sctp_asconf_ack *aack;
4533         struct sctp_stream_reset_list *liste;
4534         struct sctp_queued_to_read *sq;
4535         struct sctp_stream_queue_pending *sp;
4536         sctp_sharedkey_t *shared_key;
4537         struct socket *so;
4538         int ccnt = 0;
4539         int cnt = 0;
4540
4541         /* first, lets purge the entry from the hash table. */
4542
4543 #ifdef SCTP_LOG_CLOSING
4544         sctp_log_closing(inp, stcb, 6);
4545 #endif
4546         if (stcb->asoc.state == 0) {
4547 #ifdef SCTP_LOG_CLOSING
4548                 sctp_log_closing(inp, NULL, 7);
4549 #endif
4550                 /* there is no asoc, really TSNH :-0 */
4551                 return (1);
4552         }
4553         /* TEMP CODE */
4554         if (stcb->freed_from_where == 0) {
4555                 /* Only record the first place free happened from */
4556                 stcb->freed_from_where = from_location;
4557         }
4558         /* TEMP CODE */
4559
4560         asoc = &stcb->asoc;
4561         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4562             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4563                 /* nothing around */
4564                 so = NULL;
4565         else
4566                 so = inp->sctp_socket;
4567
4568         /*
4569          * We used timer based freeing if a reader or writer is in the way.
4570          * So we first check if we are actually being called from a timer,
4571          * if so we abort early if a reader or writer is still in the way.
4572          */
4573         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4574             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4575                 /*
4576                  * is it the timer driving us? if so are the reader/writers
4577                  * gone?
4578                  */
4579                 if (stcb->asoc.refcnt) {
4580                         /* nope, reader or writer in the way */
4581                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4582                         /* no asoc destroyed */
4583                         SCTP_TCB_UNLOCK(stcb);
4584 #ifdef SCTP_LOG_CLOSING
4585                         sctp_log_closing(inp, stcb, 8);
4586 #endif
4587                         return (0);
4588                 }
4589         }
4590         /* now clean up any other timers */
4591         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4592         asoc->hb_timer.self = NULL;
4593         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4594         asoc->dack_timer.self = NULL;
4595         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4596         /*-
4597          * For stream reset we don't blast this unless
4598          * it is a str-reset timer, it might be the
4599          * free-asoc timer which we DON'T want to
4600          * disturb.
4601          */
4602         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4603                 asoc->strreset_timer.self = NULL;
4604         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4605         asoc->asconf_timer.self = NULL;
4606         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4607         asoc->autoclose_timer.self = NULL;
4608         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4609         asoc->shut_guard_timer.self = NULL;
4610         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4611         asoc->delayed_event_timer.self = NULL;
4612         /* Mobility adaptation */
4613         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4614         asoc->delete_prim_timer.self = NULL;
4615         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4616                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4617                 net->fr_timer.self = NULL;
4618                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4619                 net->rxt_timer.self = NULL;
4620                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4621                 net->pmtu_timer.self = NULL;
4622         }
4623         /* Now the read queue needs to be cleaned up (only once) */
4624         cnt = 0;
4625         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4626                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4627                 SCTP_INP_READ_LOCK(inp);
4628                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4629                         if (sq->stcb == stcb) {
4630                                 sq->do_not_ref_stcb = 1;
4631                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4632                                 /*
4633                                  * If there is no end, there never will be
4634                                  * now.
4635                                  */
4636                                 if (sq->end_added == 0) {
4637                                         /* Held for PD-API clear that. */
4638                                         sq->pdapi_aborted = 1;
4639                                         sq->held_length = 0;
4640                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4641                                                 /*
4642                                                  * Need to add a PD-API
4643                                                  * aborted indication.
4644                                                  * Setting the control_pdapi
4645                                                  * assures that it will be
4646                                                  * added right after this
4647                                                  * msg.
4648                                                  */
4649                                                 uint32_t strseq;
4650
4651                                                 stcb->asoc.control_pdapi = sq;
4652                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4653                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4654                                                     stcb,
4655                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4656                                                     (void *)&strseq,
4657                                                     SCTP_SO_LOCKED);
4658                                                 stcb->asoc.control_pdapi = NULL;
4659                                         }
4660                                 }
4661                                 /* Add an end to wake them */
4662                                 sq->end_added = 1;
4663                                 cnt++;
4664                         }
4665                 }
4666                 SCTP_INP_READ_UNLOCK(inp);
4667                 if (stcb->block_entry) {
4668                         cnt++;
4669                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4670                         stcb->block_entry->error = ECONNRESET;
4671                         stcb->block_entry = NULL;
4672                 }
4673         }
4674         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4675                 /*
4676                  * Someone holds a reference OR the socket is unaccepted
4677                  * yet.
4678                  */
4679                 if ((stcb->asoc.refcnt) ||
4680                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4681                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4682                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4683                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4684                 }
4685                 SCTP_TCB_UNLOCK(stcb);
4686                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4687                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4688                         /* nothing around */
4689                         so = NULL;
4690                 if (so) {
4691                         /* Wake any reader/writers */
4692                         sctp_sorwakeup(inp, so);
4693                         sctp_sowwakeup(inp, so);
4694                 }
4695 #ifdef SCTP_LOG_CLOSING
4696                 sctp_log_closing(inp, stcb, 9);
4697 #endif
4698                 /* no asoc destroyed */
4699                 return (0);
4700         }
4701 #ifdef SCTP_LOG_CLOSING
4702         sctp_log_closing(inp, stcb, 10);
4703 #endif
4704         /*
4705          * When I reach here, no others want to kill the assoc yet.. and I
4706          * own the lock. Now its possible an abort comes in when I do the
4707          * lock exchange below to grab all the locks to do the final take
4708          * out. to prevent this we increment the count, which will start a
4709          * timer and blow out above thus assuring us that we hold exclusive
4710          * killing of the asoc. Note that after getting back the TCB lock we
4711          * will go ahead and increment the counter back up and stop any
4712          * timer a passing stranger may have started :-S
4713          */
4714         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4715                 atomic_add_int(&stcb->asoc.refcnt, 1);
4716
4717                 SCTP_TCB_UNLOCK(stcb);
4718                 SCTP_INP_INFO_WLOCK();
4719                 SCTP_INP_WLOCK(inp);
4720                 SCTP_TCB_LOCK(stcb);
4721         }
4722         /* Double check the GONE flag */
4723         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4724             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4725                 /* nothing around */
4726                 so = NULL;
4727
4728         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4729             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4730                 /*
4731                  * For TCP type we need special handling when we are
4732                  * connected. We also include the peel'ed off ones to.
4733                  */
4734                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4735                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4736                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4737                         if (so) {
4738                                 SOCK_LOCK(so);
4739                                 if (so->so_rcv.sb_cc == 0) {
4740                                         so->so_state &= ~(SS_ISCONNECTING |
4741                                             SS_ISDISCONNECTING |
4742                                             SS_ISCONFIRMING |
4743                                             SS_ISCONNECTED);
4744                                 }
4745                                 socantrcvmore_locked(so);
4746                                 sctp_sowwakeup(inp, so);
4747                                 sctp_sorwakeup(inp, so);
4748                                 SCTP_SOWAKEUP(so);
4749                         }
4750                 }
4751         }
4752         /*
4753          * Make it invalid too, that way if its about to run it will abort
4754          * and return.
4755          */
4756         /* re-increment the lock */
4757         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4758                 atomic_add_int(&stcb->asoc.refcnt, -1);
4759         }
4760         if (stcb->asoc.refcnt) {
4761                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4762                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4763                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4764                         SCTP_INP_INFO_WUNLOCK();
4765                         SCTP_INP_WUNLOCK(inp);
4766                 }
4767                 SCTP_TCB_UNLOCK(stcb);
4768                 return (0);
4769         }
4770         asoc->state = 0;
4771         if (inp->sctp_tcbhash) {
4772                 LIST_REMOVE(stcb, sctp_tcbhash);
4773         }
4774         if (stcb->asoc.in_asocid_hash) {
4775                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4776         }
4777         /* Now lets remove it from the list of ALL associations in the EP */
4778         LIST_REMOVE(stcb, sctp_tcblist);
4779         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4780                 SCTP_INP_INCR_REF(inp);
4781                 SCTP_INP_WUNLOCK(inp);
4782         }
4783         /* pull from vtag hash */
4784         LIST_REMOVE(stcb, sctp_asocs);
4785         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4786             inp->sctp_lport, stcb->rport);
4787
4788         /*
4789          * Now restop the timers to be sure this is paranoia at is finest!
4790          */
4791         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4792         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4793         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4794         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4795         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4796         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4797         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4798         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4799         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4800                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4801                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4802                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4803         }
4804
4805         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4806         prev = NULL;
4807         /*
4808          * The chunk lists and such SHOULD be empty but we check them just
4809          * in case.
4810          */
4811         /* anything on the wheel needs to be removed */
4812         for (i = 0; i < asoc->streamoutcnt; i++) {
4813                 struct sctp_stream_out *outs;
4814
4815                 outs = &asoc->strmout[i];
4816                 /* now clean up any chunks here */
4817                 sp = TAILQ_FIRST(&outs->outqueue);
4818                 while (sp) {
4819                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4820                         if (sp->data) {
4821                                 if (so) {
4822                                         /* Still an open socket - report */
4823                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4824                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
4825                                             (void *)sp, 0);
4826                                 }
4827                                 if (sp->data) {
4828                                         sctp_m_freem(sp->data);
4829                                         sp->data = NULL;
4830                                         sp->tail_mbuf = NULL;
4831                                 }
4832                         }
4833                         if (sp->net) {
4834                                 sctp_free_remote_addr(sp->net);
4835                                 sp->net = NULL;
4836                         }
4837                         sctp_free_spbufspace(stcb, asoc, sp);
4838                         if (sp->holds_key_ref)
4839                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4840                         /* Free the zone stuff  */
4841                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4842                         SCTP_DECR_STRMOQ_COUNT();
4843                         /* sa_ignore FREED_MEMORY */
4844                         sp = TAILQ_FIRST(&outs->outqueue);
4845                 }
4846         }
4847
4848         /* sa_ignore FREED_MEMORY */
4849         while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
4850                 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
4851                 SCTP_FREE(liste, SCTP_M_STRESET);
4852         }
4853
4854         sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4855         while (sq) {
4856                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4857                 if (sq->data) {
4858                         sctp_m_freem(sq->data);
4859                         sq->data = NULL;
4860                 }
4861                 sctp_free_remote_addr(sq->whoFrom);
4862                 sq->whoFrom = NULL;
4863                 sq->stcb = NULL;
4864                 /* Free the ctl entry */
4865                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4866                 SCTP_DECR_READQ_COUNT();
4867                 /* sa_ignore FREED_MEMORY */
4868                 sq = TAILQ_FIRST(&asoc->pending_reply_queue);
4869         }
4870
4871         chk = TAILQ_FIRST(&asoc->free_chunks);
4872         while (chk) {
4873                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4874                 if (chk->data) {
4875                         sctp_m_freem(chk->data);
4876                         chk->data = NULL;
4877                 }
4878                 if (chk->holds_key_ref)
4879                         sctp_auth_key_release(stcb, chk->auth_keyid);
4880                 ccnt++;
4881                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4882                 SCTP_DECR_CHK_COUNT();
4883                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4884                 asoc->free_chunk_cnt--;
4885                 /* sa_ignore FREED_MEMORY */
4886                 chk = TAILQ_FIRST(&asoc->free_chunks);
4887         }
4888         /* pending send queue SHOULD be empty */
4889         if (!TAILQ_EMPTY(&asoc->send_queue)) {
4890                 chk = TAILQ_FIRST(&asoc->send_queue);
4891                 while (chk) {
4892                         TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4893                         if (chk->data) {
4894                                 if (so) {
4895                                         /* Still a socket? */
4896                                         sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4897                                             SCTP_NOTIFY_DATAGRAM_UNSENT, chk, 0);
4898                                 }
4899                                 if (chk->data) {
4900                                         sctp_m_freem(chk->data);
4901                                         chk->data = NULL;
4902                                 }
4903                         }
4904                         if (chk->holds_key_ref)
4905                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4906                         ccnt++;
4907                         if (chk->whoTo) {
4908                                 sctp_free_remote_addr(chk->whoTo);
4909                                 chk->whoTo = NULL;
4910                         }
4911                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4912                         SCTP_DECR_CHK_COUNT();
4913                         /* sa_ignore FREED_MEMORY */
4914                         chk = TAILQ_FIRST(&asoc->send_queue);
4915                 }
4916         }
4917 /*
4918   if (ccnt) {
4919   printf("Freed %d from send_queue\n", ccnt);
4920   ccnt = 0;
4921   }
4922 */
4923         /* sent queue SHOULD be empty */
4924         if (!TAILQ_EMPTY(&asoc->sent_queue)) {
4925                 chk = TAILQ_FIRST(&asoc->sent_queue);
4926                 while (chk) {
4927                         TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4928                         if (chk->data) {
4929                                 if (so) {
4930                                         /* Still a socket? */
4931                                         sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4932                                             SCTP_NOTIFY_DATAGRAM_SENT, chk, 0);
4933                                 }
4934                                 if (chk->data) {
4935                                         sctp_m_freem(chk->data);
4936                                         chk->data = NULL;
4937                                 }
4938                         }
4939                         if (chk->holds_key_ref)
4940                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4941                         ccnt++;
4942                         sctp_free_remote_addr(chk->whoTo);
4943                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4944                         SCTP_DECR_CHK_COUNT();
4945                         /* sa_ignore FREED_MEMORY */
4946                         chk = TAILQ_FIRST(&asoc->sent_queue);
4947                 }
4948         }
4949 /*
4950   if (ccnt) {
4951   printf("Freed %d from sent_queue\n", ccnt);
4952   ccnt = 0;
4953   }
4954 */
4955         /* control queue MAY not be empty */
4956         if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
4957                 chk = TAILQ_FIRST(&asoc->control_send_queue);
4958                 while (chk) {
4959                         TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4960                         if (chk->data) {
4961                                 sctp_m_freem(chk->data);
4962                                 chk->data = NULL;
4963                         }
4964                         if (chk->holds_key_ref)
4965                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4966                         ccnt++;
4967                         sctp_free_remote_addr(chk->whoTo);
4968                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4969                         SCTP_DECR_CHK_COUNT();
4970                         /* sa_ignore FREED_MEMORY */
4971                         chk = TAILQ_FIRST(&asoc->control_send_queue);
4972                 }
4973         }
4974 /*
4975   if (ccnt) {
4976   printf("Freed %d from ctrl_queue\n", ccnt);
4977   ccnt = 0;
4978   }
4979 */
4980
4981         /* ASCONF queue MAY not be empty */
4982         if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) {
4983                 chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4984                 while (chk) {
4985                         TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4986                         if (chk->data) {
4987                                 sctp_m_freem(chk->data);
4988                                 chk->data = NULL;
4989                         }
4990                         if (chk->holds_key_ref)
4991                                 sctp_auth_key_release(stcb, chk->auth_keyid);
4992                         ccnt++;
4993                         sctp_free_remote_addr(chk->whoTo);
4994                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4995                         SCTP_DECR_CHK_COUNT();
4996                         /* sa_ignore FREED_MEMORY */
4997                         chk = TAILQ_FIRST(&asoc->asconf_send_queue);
4998                 }
4999         }
5000 /*
5001   if (ccnt) {
5002   printf("Freed %d from asconf_queue\n", ccnt);
5003   ccnt = 0;
5004   }
5005 */
5006         if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
5007                 chk = TAILQ_FIRST(&asoc->reasmqueue);
5008                 while (chk) {
5009                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5010                         if (chk->data) {
5011                                 sctp_m_freem(chk->data);
5012                                 chk->data = NULL;
5013                         }
5014                         if (chk->holds_key_ref)
5015                                 sctp_auth_key_release(stcb, chk->auth_keyid);
5016                         sctp_free_remote_addr(chk->whoTo);
5017                         ccnt++;
5018                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5019                         SCTP_DECR_CHK_COUNT();
5020                         /* sa_ignore FREED_MEMORY */
5021                         chk = TAILQ_FIRST(&asoc->reasmqueue);
5022                 }
5023         }
5024 /*
5025   if (ccnt) {
5026   printf("Freed %d from reasm_queue\n", ccnt);
5027   ccnt = 0;
5028   }
5029 */
5030         if (asoc->mapping_array) {
5031                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5032                 asoc->mapping_array = NULL;
5033         }
5034         if (asoc->nr_mapping_array) {
5035                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5036                 asoc->nr_mapping_array = NULL;
5037         }
5038         /* the stream outs */
5039         if (asoc->strmout) {
5040                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5041                 asoc->strmout = NULL;
5042         }
5043         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5044         if (asoc->strmin) {
5045                 struct sctp_queued_to_read *ctl;
5046
5047                 for (i = 0; i < asoc->streamincnt; i++) {
5048                         if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
5049                                 /* We have somethings on the streamin queue */
5050                                 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
5051                                 while (ctl) {
5052                                         TAILQ_REMOVE(&asoc->strmin[i].inqueue,
5053                                             ctl, next);
5054                                         sctp_free_remote_addr(ctl->whoFrom);
5055                                         if (ctl->data) {
5056                                                 sctp_m_freem(ctl->data);
5057                                                 ctl->data = NULL;
5058                                         }
5059                                         /*
5060                                          * We don't free the address here
5061                                          * since all the net's were freed
5062                                          * above.
5063                                          */
5064                                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5065                                         SCTP_DECR_READQ_COUNT();
5066                                         ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
5067                                 }
5068                         }
5069                 }
5070                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5071                 asoc->strmin = NULL;
5072         }
5073         asoc->streamincnt = 0;
5074         while (!TAILQ_EMPTY(&asoc->nets)) {
5075                 /* sa_ignore FREED_MEMORY */
5076                 net = TAILQ_FIRST(&asoc->nets);
5077                 /* pull from list */
5078                 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) {
5079 #ifdef INVARIANTS
5080                         panic("no net's left alloc'ed, or list points to itself");
5081 #endif
5082                         break;
5083                 }
5084                 prev = net;
5085                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5086                 sctp_free_remote_addr(net);
5087         }
5088
5089         while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
5090                 /* sa_ignore FREED_MEMORY */
5091                 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
5092                 sctp_remove_laddr(laddr);
5093         }
5094
5095         /* pending asconf (address) parameters */
5096         while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
5097                 /* sa_ignore FREED_MEMORY */
5098                 aparam = TAILQ_FIRST(&asoc->asconf_queue);
5099                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5100                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5101         }
5102         while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
5103                 /* sa_ignore FREED_MEMORY */
5104                 aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
5105                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5106                 if (aack->data != NULL) {
5107                         sctp_m_freem(aack->data);
5108                 }
5109                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5110         }
5111         /* clean up auth stuff */
5112         if (asoc->local_hmacs)
5113                 sctp_free_hmaclist(asoc->local_hmacs);
5114         if (asoc->peer_hmacs)
5115                 sctp_free_hmaclist(asoc->peer_hmacs);
5116
5117         if (asoc->local_auth_chunks)
5118                 sctp_free_chunklist(asoc->local_auth_chunks);
5119         if (asoc->peer_auth_chunks)
5120                 sctp_free_chunklist(asoc->peer_auth_chunks);
5121
5122         sctp_free_authinfo(&asoc->authinfo);
5123
5124         shared_key = LIST_FIRST(&asoc->shared_keys);
5125         while (shared_key) {
5126                 LIST_REMOVE(shared_key, next);
5127                 sctp_free_sharedkey(shared_key);
5128                 /* sa_ignore FREED_MEMORY */
5129                 shared_key = LIST_FIRST(&asoc->shared_keys);
5130         }
5131
5132         /* Insert new items here :> */
5133
5134         /* Get rid of LOCK */
5135         SCTP_TCB_LOCK_DESTROY(stcb);
5136         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5137         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5138                 SCTP_INP_INFO_WUNLOCK();
5139                 SCTP_INP_RLOCK(inp);
5140         }
5141 #ifdef SCTP_TRACK_FREED_ASOCS
5142         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5143                 /* now clean up the tasoc itself */
5144                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5145                 SCTP_DECR_ASOC_COUNT();
5146         } else {
5147                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5148         }
5149 #else
5150         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5151         SCTP_DECR_ASOC_COUNT();
5152 #endif
5153         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5154                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5155                         /*
5156                          * If its NOT the inp_free calling us AND sctp_close
5157                          * as been called, we call back...
5158                          */
5159                         SCTP_INP_RUNLOCK(inp);
5160                         /*
5161                          * This will start the kill timer (if we are the
5162                          * lastone) since we hold an increment yet. But this
5163                          * is the only safe way to do this since otherwise
5164                          * if the socket closes at the same time we are here
5165                          * we might collide in the cleanup.
5166                          */
5167                         sctp_inpcb_free(inp,
5168                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5169                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5170                         SCTP_INP_DECR_REF(inp);
5171                         goto out_of;
5172                 } else {
5173                         /* The socket is still open. */
5174                         SCTP_INP_DECR_REF(inp);
5175                 }
5176         }
5177         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5178                 SCTP_INP_RUNLOCK(inp);
5179         }
5180 out_of:
5181         /* destroyed the asoc */
5182 #ifdef SCTP_LOG_CLOSING
5183         sctp_log_closing(inp, NULL, 11);
5184 #endif
5185         return (1);
5186 }
5187
5188
5189
5190 /*
5191  * determine if a destination is "reachable" based upon the addresses bound
5192  * to the current endpoint (e.g. only v4 or v6 currently bound)
5193  */
5194 /*
5195  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5196  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5197  * types bound as its endpoint
5198  */
5199 int
5200 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5201 {
5202         struct sctp_inpcb *inp;
5203         int answer;
5204
5205         /*
5206          * No locks here, the TCB, in all cases is already locked and an
5207          * assoc is up. There is either a INP lock by the caller applied (in
5208          * asconf case when deleting an address) or NOT in the HB case,
5209          * however if HB then the INP increment is up and the INP will not
5210          * be removed (on top of the fact that we have a TCB lock). So we
5211          * only want to read the sctp_flags, which is either bound-all or
5212          * not.. no protection needed since once an assoc is up you can't be
5213          * changing your binding.
5214          */
5215         inp = stcb->sctp_ep;
5216         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5217                 /* if bound all, destination is not restricted */
5218                 /*
5219                  * RRS: Question during lock work: Is this correct? If you
5220                  * are bound-all you still might need to obey the V4--V6
5221                  * flags??? IMO this bound-all stuff needs to be removed!
5222                  */
5223                 return (1);
5224         }
5225         /* NOTE: all "scope" checks are done when local addresses are added */
5226         if (destaddr->sa_family == AF_INET6) {
5227                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5228         } else if (destaddr->sa_family == AF_INET) {
5229                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5230         } else {
5231                 /* invalid family, so it's unreachable */
5232                 answer = 0;
5233         }
5234         return (answer);
5235 }
5236
5237 /*
5238  * update the inp_vflags on an endpoint
5239  */
5240 static void
5241 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5242 {
5243         struct sctp_laddr *laddr;
5244
5245         /* first clear the flag */
5246         inp->ip_inp.inp.inp_vflag = 0;
5247         /* set the flag based on addresses on the ep list */
5248         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5249                 if (laddr->ifa == NULL) {
5250                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5251                             __FUNCTION__);
5252                         continue;
5253                 }
5254                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5255                         continue;
5256                 }
5257                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5258                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5259                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5260                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5261                 }
5262         }
5263 }
5264
5265 /*
5266  * Add the address to the endpoint local address list There is nothing to be
5267  * done if we are bound to all addresses
5268  */
5269 void
5270 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5271 {
5272         struct sctp_laddr *laddr;
5273         int fnd, error = 0;
5274
5275         fnd = 0;
5276
5277         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5278                 /* You are already bound to all. You have it already */
5279                 return;
5280         }
5281         if (ifa->address.sa.sa_family == AF_INET6) {
5282                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5283                         /* Can't bind a non-useable addr. */
5284                         return;
5285                 }
5286         }
5287         /* first, is it already present? */
5288         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5289                 if (laddr->ifa == ifa) {
5290                         fnd = 1;
5291                         break;
5292                 }
5293         }
5294
5295         if (fnd == 0) {
5296                 /* Not in the ep list */
5297                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5298                 if (error != 0)
5299                         return;
5300                 inp->laddr_count++;
5301                 /* update inp_vflag flags */
5302                 if (ifa->address.sa.sa_family == AF_INET6) {
5303                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5304                 } else if (ifa->address.sa.sa_family == AF_INET) {
5305                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5306                 }
5307         }
5308         return;
5309 }
5310
5311
5312 /*
5313  * select a new (hopefully reachable) destination net (should only be used
5314  * when we deleted an ep addr that is the only usable source address to reach
5315  * the destination net)
5316  */
5317 static void
5318 sctp_select_primary_destination(struct sctp_tcb *stcb)
5319 {
5320         struct sctp_nets *net;
5321
5322         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5323                 /* for now, we'll just pick the first reachable one we find */
5324                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5325                         continue;
5326                 if (sctp_destination_is_reachable(stcb,
5327                     (struct sockaddr *)&net->ro._l_addr)) {
5328                         /* found a reachable destination */
5329                         stcb->asoc.primary_destination = net;
5330                 }
5331         }
5332         /* I can't there from here! ...we're gonna die shortly... */
5333 }
5334
5335
5336 /*
5337  * Delete the address from the endpoint local address list There is nothing
5338  * to be done if we are bound to all addresses
5339  */
5340 void
5341 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5342 {
5343         struct sctp_laddr *laddr;
5344         int fnd;
5345
5346         fnd = 0;
5347         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5348                 /* You are already bound to all. You have it already */
5349                 return;
5350         }
5351         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5352                 if (laddr->ifa == ifa) {
5353                         fnd = 1;
5354                         break;
5355                 }
5356         }
5357         if (fnd && (inp->laddr_count < 2)) {
5358                 /* can't delete unless there are at LEAST 2 addresses */
5359                 return;
5360         }
5361         if (fnd) {
5362                 /*
5363                  * clean up any use of this address go through our
5364                  * associations and clear any last_used_address that match
5365                  * this one for each assoc, see if a new primary_destination
5366                  * is needed
5367                  */
5368                 struct sctp_tcb *stcb;
5369
5370                 /* clean up "next_addr_touse" */
5371                 if (inp->next_addr_touse == laddr)
5372                         /* delete this address */
5373                         inp->next_addr_touse = NULL;
5374
5375                 /* clean up "last_used_address" */
5376                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5377                         struct sctp_nets *net;
5378
5379                         SCTP_TCB_LOCK(stcb);
5380                         if (stcb->asoc.last_used_address == laddr)
5381                                 /* delete this address */
5382                                 stcb->asoc.last_used_address = NULL;
5383                         /*
5384                          * Now spin through all the nets and purge any ref
5385                          * to laddr
5386                          */
5387                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5388                                 if (net->ro._s_addr &&
5389                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5390                                         /* Yep, purge src address selected */
5391                                         sctp_rtentry_t *rt;
5392
5393                                         /* delete this address if cached */
5394                                         rt = net->ro.ro_rt;
5395                                         if (rt != NULL) {
5396                                                 RTFREE(rt);
5397                                                 net->ro.ro_rt = NULL;
5398                                         }
5399                                         sctp_free_ifa(net->ro._s_addr);
5400                                         net->ro._s_addr = NULL;
5401                                         net->src_addr_selected = 0;
5402                                 }
5403                         }
5404                         SCTP_TCB_UNLOCK(stcb);
5405                 }               /* for each tcb */
5406                 /* remove it from the ep list */
5407                 sctp_remove_laddr(laddr);
5408                 inp->laddr_count--;
5409                 /* update inp_vflag flags */
5410                 sctp_update_ep_vflag(inp);
5411         }
5412         return;
5413 }
5414
5415 /*
5416  * Add the address to the TCB local address restricted list.
5417  * This is a "pending" address list (eg. addresses waiting for an
5418  * ASCONF-ACK response) and cannot be used as a valid source address.
5419  */
5420 void
5421 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5422 {
5423         struct sctp_inpcb *inp;
5424         struct sctp_laddr *laddr;
5425         struct sctpladdr *list;
5426
5427         /*
5428          * Assumes TCB is locked.. and possibly the INP. May need to
5429          * confirm/fix that if we need it and is not the case.
5430          */
5431         list = &stcb->asoc.sctp_restricted_addrs;
5432
5433         inp = stcb->sctp_ep;
5434         if (ifa->address.sa.sa_family == AF_INET6) {
5435                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5436                         /* Can't bind a non-existent addr. */
5437                         return;
5438                 }
5439         }
5440         /* does the address already exist? */
5441         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5442                 if (laddr->ifa == ifa) {
5443                         return;
5444                 }
5445         }
5446
5447         /* add to the list */
5448         (void)sctp_insert_laddr(list, ifa, 0);
5449         return;
5450 }
5451
5452 /*
5453  * insert an laddr entry with the given ifa for the desired list
5454  */
5455 int
5456 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5457 {
5458         struct sctp_laddr *laddr;
5459
5460         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5461         if (laddr == NULL) {
5462                 /* out of memory? */
5463                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5464                 return (EINVAL);
5465         }
5466         SCTP_INCR_LADDR_COUNT();
5467         bzero(laddr, sizeof(*laddr));
5468         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5469         laddr->ifa = ifa;
5470         laddr->action = act;
5471         atomic_add_int(&ifa->refcount, 1);
5472         /* insert it */
5473         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5474
5475         return (0);
5476 }
5477
5478 /*
5479  * Remove an laddr entry from the local address list (on an assoc)
5480  */
5481 void
5482 sctp_remove_laddr(struct sctp_laddr *laddr)
5483 {
5484
5485         /* remove from the list */
5486         LIST_REMOVE(laddr, sctp_nxt_addr);
5487         sctp_free_ifa(laddr->ifa);
5488         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5489         SCTP_DECR_LADDR_COUNT();
5490 }
5491
5492 /*
5493  * Remove a local address from the TCB local address restricted list
5494  */
5495 void
5496 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5497 {
5498         struct sctp_inpcb *inp;
5499         struct sctp_laddr *laddr;
5500
5501         /*
5502          * This is called by asconf work. It is assumed that a) The TCB is
5503          * locked and b) The INP is locked. This is true in as much as I can
5504          * trace through the entry asconf code where I did these locks.
5505          * Again, the ASCONF code is a bit different in that it does lock
5506          * the INP during its work often times. This must be since we don't
5507          * want other proc's looking up things while what they are looking
5508          * up is changing :-D
5509          */
5510
5511         inp = stcb->sctp_ep;
5512         /* if subset bound and don't allow ASCONF's, can't delete last */
5513         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5514             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5515                 if (stcb->sctp_ep->laddr_count < 2) {
5516                         /* can't delete last address */
5517                         return;
5518                 }
5519         }
5520         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5521                 /* remove the address if it exists */
5522                 if (laddr->ifa == NULL)
5523                         continue;
5524                 if (laddr->ifa == ifa) {
5525                         sctp_remove_laddr(laddr);
5526                         return;
5527                 }
5528         }
5529
5530         /* address not found! */
5531         return;
5532 }
5533
5534 /*
5535  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5536  */
5537 /* sysctl */
5538 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5539 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5540
5541 void
5542 sctp_pcb_init()
5543 {
5544         /*
5545          * SCTP initialization for the PCB structures should be called by
5546          * the sctp_init() funciton.
5547          */
5548         int i;
5549         struct timeval tv;
5550
5551         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5552                 /* error I was called twice */
5553                 return;
5554         }
5555         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5556
5557 #if defined(SCTP_LOCAL_TRACE_BUF)
5558         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5559 #endif
5560         (void)SCTP_GETTIME_TIMEVAL(&tv);
5561 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5562         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5563         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5564 #else
5565         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5566         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5567 #endif
5568         /* init the empty list of (All) Endpoints */
5569         LIST_INIT(&SCTP_BASE_INFO(listhead));
5570
5571
5572         /* init the hash table of endpoints */
5573         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5574         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5575         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5576         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5577             &SCTP_BASE_INFO(hashasocmark));
5578         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5579             &SCTP_BASE_INFO(hashmark));
5580         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5581             &SCTP_BASE_INFO(hashtcpmark));
5582         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5583
5584
5585         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5586             &SCTP_BASE_INFO(hashvrfmark));
5587
5588         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5589             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5590         /* init the zones */
5591         /*
5592          * FIX ME: Should check for NULL returns, but if it does fail we are
5593          * doomed to panic anyways... add later maybe.
5594          */
5595         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5596             sizeof(struct sctp_inpcb), maxsockets);
5597
5598         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5599             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5600
5601         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5602             sizeof(struct sctp_laddr),
5603             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5604
5605         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5606             sizeof(struct sctp_nets),
5607             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5608
5609         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5610             sizeof(struct sctp_tmit_chunk),
5611             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5612
5613         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5614             sizeof(struct sctp_queued_to_read),
5615             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5616
5617         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5618             sizeof(struct sctp_stream_queue_pending),
5619             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5620
5621         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5622             sizeof(struct sctp_asconf),
5623             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5624
5625         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5626             sizeof(struct sctp_asconf_ack),
5627             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5628
5629
5630         /* Master Lock INIT for info structure */
5631         SCTP_INP_INFO_LOCK_INIT();
5632         SCTP_STATLOG_INIT_LOCK();
5633
5634         SCTP_IPI_COUNT_INIT();
5635         SCTP_IPI_ADDR_INIT();
5636 #ifdef SCTP_PACKET_LOGGING
5637         SCTP_IP_PKTLOG_INIT();
5638 #endif
5639         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5640
5641         SCTP_WQ_ADDR_INIT();
5642         /* not sure if we need all the counts */
5643         SCTP_BASE_INFO(ipi_count_ep) = 0;
5644         /* assoc/tcb zone info */
5645         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5646         /* local addrlist zone info */
5647         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5648         /* remote addrlist zone info */
5649         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5650         /* chunk info */
5651         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5652
5653         /* socket queue zone info */
5654         SCTP_BASE_INFO(ipi_count_readq) = 0;
5655
5656         /* stream out queue cont */
5657         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5658
5659         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5660         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5661
5662         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5663
5664         /* Init the TIMEWAIT list */
5665         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5666                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5667         }
5668
5669         sctp_startup_iterator();
5670
5671         /*
5672          * INIT the default VRF which for BSD is the only one, other O/S's
5673          * may have more. But initially they must start with one and then
5674          * add the VRF's as addresses are added.
5675          */
5676         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5677
5678 }
5679
5680 /*
5681  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5682  */
5683 void
5684 sctp_pcb_finish(void)
5685 {
5686         struct sctp_vrflist *vrf_bucket;
5687         struct sctp_vrf *vrf;
5688         struct sctp_ifn *ifn;
5689         struct sctp_ifa *ifa;
5690         struct sctpvtaghead *chain;
5691         struct sctp_tagblock *twait_block, *prev_twait_block;
5692         struct sctp_laddr *wi;
5693         int i;
5694
5695         /*
5696          * Free BSD the it thread never exits but we do clean up. The only
5697          * way freebsd reaches here if we have VRF's but we still add the
5698          * ifdef to make it compile on old versions.
5699          */
5700         {
5701                 struct sctp_iterator *it, *nit;
5702
5703                 SCTP_IPI_ITERATOR_WQ_LOCK();
5704                 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead);
5705                 while (it) {
5706                         nit = TAILQ_NEXT(it, sctp_nxt_itr);
5707                         if (it->vn != curvnet) {
5708                                 it = nit;
5709                                 continue;
5710                         }
5711                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
5712                             it, sctp_nxt_itr);
5713                         if (it->function_atend != NULL) {
5714                                 (*it->function_atend) (it->pointer, it->val);
5715                         }
5716                         SCTP_FREE(it, SCTP_M_ITER);
5717                         it = nit;
5718                 }
5719                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5720                 SCTP_ITERATOR_LOCK();
5721                 if ((sctp_it_ctl.cur_it) &&
5722                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5723                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5724                 }
5725                 SCTP_ITERATOR_UNLOCK();
5726         }
5727
5728         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5729         SCTP_WQ_ADDR_LOCK();
5730         while ((wi = LIST_FIRST(&SCTP_BASE_INFO(addr_wq))) != NULL) {
5731                 LIST_REMOVE(wi, sctp_nxt_addr);
5732                 SCTP_DECR_LADDR_COUNT();
5733                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5734         }
5735         SCTP_WQ_ADDR_UNLOCK();
5736
5737         /*
5738          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5739          * destroyed first).
5740          */
5741         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5742         while ((vrf = LIST_FIRST(vrf_bucket)) != NULL) {
5743                 while ((ifn = LIST_FIRST(&vrf->ifnlist)) != NULL) {
5744                         while ((ifa = LIST_FIRST(&ifn->ifalist)) != NULL) {
5745                                 /* free the ifa */
5746                                 LIST_REMOVE(ifa, next_bucket);
5747                                 LIST_REMOVE(ifa, next_ifa);
5748                                 SCTP_FREE(ifa, SCTP_M_IFA);
5749                         }
5750                         /* free the ifn */
5751                         LIST_REMOVE(ifn, next_bucket);
5752                         LIST_REMOVE(ifn, next_ifn);
5753                         SCTP_FREE(ifn, SCTP_M_IFN);
5754                 }
5755                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5756                 /* free the vrf */
5757                 LIST_REMOVE(vrf, next_vrf);
5758                 SCTP_FREE(vrf, SCTP_M_VRF);
5759         }
5760         /* free the vrf hashes */
5761         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5762         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5763
5764         /*
5765          * free the TIMEWAIT list elements malloc'd in the function
5766          * sctp_add_vtag_to_timewait()...
5767          */
5768         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5769                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5770                 if (!LIST_EMPTY(chain)) {
5771                         prev_twait_block = NULL;
5772                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5773                                 if (prev_twait_block) {
5774                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5775                                 }
5776                                 prev_twait_block = twait_block;
5777                         }
5778                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5779                 }
5780         }
5781
5782         /* free the locks and mutexes */
5783 #ifdef SCTP_PACKET_LOGGING
5784         SCTP_IP_PKTLOG_DESTROY();
5785 #endif
5786         SCTP_IPI_ADDR_DESTROY();
5787         SCTP_STATLOG_DESTROY();
5788         SCTP_INP_INFO_LOCK_DESTROY();
5789
5790         SCTP_WQ_ADDR_DESTROY();
5791
5792         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5793         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5794         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5795         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5796         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5797         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5798         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5799         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5800         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5801         /* Get rid of other stuff to */
5802         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5803                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5804         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5805                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5806         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5807                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5808
5809 }
5810
5811
5812 int
5813 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5814     int iphlen, int offset, int limit, struct sctphdr *sh,
5815     struct sockaddr *altsa)
5816 {
5817         /*
5818          * grub through the INIT pulling addresses and loading them to the
5819          * nets structure in the asoc. The from address in the mbuf should
5820          * also be loaded (if it is not already). This routine can be called
5821          * with either INIT or INIT-ACK's as long as the m points to the IP
5822          * packet and the offset points to the beginning of the parameters.
5823          */
5824         struct sctp_inpcb *inp, *l_inp;
5825         struct sctp_nets *net, *net_tmp;
5826         struct ip *iph;
5827         struct sctp_paramhdr *phdr, parm_buf;
5828         struct sctp_tcb *stcb_tmp;
5829         uint16_t ptype, plen;
5830         struct sockaddr *sa;
5831         struct sockaddr_storage dest_store;
5832         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5833         struct sockaddr_in sin;
5834         struct sockaddr_in6 sin6;
5835         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5836         struct sctp_auth_random *p_random = NULL;
5837         uint16_t random_len = 0;
5838         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5839         struct sctp_auth_hmac_algo *hmacs = NULL;
5840         uint16_t hmacs_len = 0;
5841         uint8_t saw_asconf = 0;
5842         uint8_t saw_asconf_ack = 0;
5843         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5844         struct sctp_auth_chunk_list *chunks = NULL;
5845         uint16_t num_chunks = 0;
5846         sctp_key_t *new_key;
5847         uint32_t keylen;
5848         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5849
5850         /* First get the destination address setup too. */
5851         memset(&sin, 0, sizeof(sin));
5852         memset(&sin6, 0, sizeof(sin6));
5853
5854         sin.sin_family = AF_INET;
5855         sin.sin_len = sizeof(sin);
5856         sin.sin_port = stcb->rport;
5857
5858         sin6.sin6_family = AF_INET6;
5859         sin6.sin6_len = sizeof(struct sockaddr_in6);
5860         sin6.sin6_port = stcb->rport;
5861         if (altsa == NULL) {
5862                 iph = mtod(m, struct ip *);
5863                 switch (iph->ip_v) {
5864                 case IPVERSION:
5865                         {
5866                                 /* its IPv4 */
5867                                 struct sockaddr_in *sin_2;
5868
5869                                 sin_2 = (struct sockaddr_in *)(local_sa);
5870                                 memset(sin_2, 0, sizeof(sin));
5871                                 sin_2->sin_family = AF_INET;
5872                                 sin_2->sin_len = sizeof(sin);
5873                                 sin_2->sin_port = sh->dest_port;
5874                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5875                                 sin.sin_addr = iph->ip_src;
5876                                 sa = (struct sockaddr *)&sin;
5877                                 break;
5878                         }
5879 #ifdef INET6
5880                 case IPV6_VERSION >> 4:
5881                         {
5882                                 /* its IPv6 */
5883                                 struct ip6_hdr *ip6;
5884                                 struct sockaddr_in6 *sin6_2;
5885
5886                                 ip6 = mtod(m, struct ip6_hdr *);
5887                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5888                                 memset(sin6_2, 0, sizeof(sin6));
5889                                 sin6_2->sin6_family = AF_INET6;
5890                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5891                                 sin6_2->sin6_port = sh->dest_port;
5892                                 sin6.sin6_addr = ip6->ip6_src;
5893                                 sa = (struct sockaddr *)&sin6;
5894                                 break;
5895                         }
5896 #endif
5897                 default:
5898                         return (-1);
5899                         break;
5900                 }
5901         } else {
5902                 /*
5903                  * For cookies we use the src address NOT from the packet
5904                  * but from the original INIT
5905                  */
5906                 sa = altsa;
5907         }
5908         /* Turn off ECN until we get through all params */
5909         stcb->asoc.ecn_allowed = 0;
5910         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5911                 /* mark all addresses that we have currently on the list */
5912                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5913         }
5914         /* does the source address already exist? if so skip it */
5915         l_inp = inp = stcb->sctp_ep;
5916
5917         atomic_add_int(&stcb->asoc.refcnt, 1);
5918         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5919         atomic_add_int(&stcb->asoc.refcnt, -1);
5920
5921         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5922                 /* we must add the source address */
5923                 /* no scope set here since we have a tcb already. */
5924                 if ((sa->sa_family == AF_INET) &&
5925                     (stcb->asoc.ipv4_addr_legal)) {
5926                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
5927                                 return (-1);
5928                         }
5929                 } else if ((sa->sa_family == AF_INET6) &&
5930                     (stcb->asoc.ipv6_addr_legal)) {
5931                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
5932                                 return (-2);
5933                         }
5934                 }
5935         } else {
5936                 if (net_tmp != NULL && stcb_tmp == stcb) {
5937                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
5938                 } else if (stcb_tmp != stcb) {
5939                         /* It belongs to another association? */
5940                         if (stcb_tmp)
5941                                 SCTP_TCB_UNLOCK(stcb_tmp);
5942                         return (-3);
5943                 }
5944         }
5945         if (stcb->asoc.state == 0) {
5946                 /* the assoc was freed? */
5947                 return (-4);
5948         }
5949         /*
5950          * peer must explicitly turn this on. This may have been initialized
5951          * to be "on" in order to allow local addr changes while INIT's are
5952          * in flight.
5953          */
5954         stcb->asoc.peer_supports_asconf = 0;
5955         /* now we must go through each of the params. */
5956         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
5957         while (phdr) {
5958                 ptype = ntohs(phdr->param_type);
5959                 plen = ntohs(phdr->param_length);
5960                 /*
5961                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
5962                  * (int)plen);
5963                  */
5964                 if (offset + plen > limit) {
5965                         break;
5966                 }
5967                 if (plen == 0) {
5968                         break;
5969                 }
5970                 if (ptype == SCTP_IPV4_ADDRESS) {
5971                         if (stcb->asoc.ipv4_addr_legal) {
5972                                 struct sctp_ipv4addr_param *p4, p4_buf;
5973
5974                                 /* ok get the v4 address and check/add */
5975                                 phdr = sctp_get_next_param(m, offset,
5976                                     (struct sctp_paramhdr *)&p4_buf,
5977                                     sizeof(p4_buf));
5978                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5979                                     phdr == NULL) {
5980                                         return (-5);
5981                                 }
5982                                 p4 = (struct sctp_ipv4addr_param *)phdr;
5983                                 sin.sin_addr.s_addr = p4->addr;
5984                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
5985                                         /* Skip multi-cast addresses */
5986                                         goto next_param;
5987                                 }
5988                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
5989                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
5990                                         goto next_param;
5991                                 }
5992                                 sa = (struct sockaddr *)&sin;
5993                                 inp = stcb->sctp_ep;
5994                                 atomic_add_int(&stcb->asoc.refcnt, 1);
5995                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
5996                                     local_sa, stcb);
5997                                 atomic_add_int(&stcb->asoc.refcnt, -1);
5998
5999                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6000                                     inp == NULL) {
6001                                         /* we must add the source address */
6002                                         /*
6003                                          * no scope set since we have a tcb
6004                                          * already
6005                                          */
6006
6007                                         /*
6008                                          * we must validate the state again
6009                                          * here
6010                                          */
6011                         add_it_now:
6012                                         if (stcb->asoc.state == 0) {
6013                                                 /* the assoc was freed? */
6014                                                 return (-7);
6015                                         }
6016                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6017                                                 return (-8);
6018                                         }
6019                                 } else if (stcb_tmp == stcb) {
6020                                         if (stcb->asoc.state == 0) {
6021                                                 /* the assoc was freed? */
6022                                                 return (-10);
6023                                         }
6024                                         if (net != NULL) {
6025                                                 /* clear flag */
6026                                                 net->dest_state &=
6027                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6028                                         }
6029                                 } else {
6030                                         /*
6031                                          * strange, address is in another
6032                                          * assoc? straighten out locks.
6033                                          */
6034                                         if (stcb_tmp) {
6035                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6036                                                         /*
6037                                                          * in setup state we
6038                                                          * abort this guy
6039                                                          */
6040                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6041                                                             stcb_tmp, 1, NULL, 0);
6042                                                         goto add_it_now;
6043                                                 }
6044                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6045                                         }
6046                                         if (stcb->asoc.state == 0) {
6047                                                 /* the assoc was freed? */
6048                                                 return (-12);
6049                                         }
6050                                         return (-13);
6051                                 }
6052                         }
6053                 } else if (ptype == SCTP_IPV6_ADDRESS) {
6054                         if (stcb->asoc.ipv6_addr_legal) {
6055                                 /* ok get the v6 address and check/add */
6056                                 struct sctp_ipv6addr_param *p6, p6_buf;
6057
6058                                 phdr = sctp_get_next_param(m, offset,
6059                                     (struct sctp_paramhdr *)&p6_buf,
6060                                     sizeof(p6_buf));
6061                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6062                                     phdr == NULL) {
6063                                         return (-14);
6064                                 }
6065                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6066                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6067                                     sizeof(p6->addr));
6068                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6069                                         /* Skip multi-cast addresses */
6070                                         goto next_param;
6071                                 }
6072                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6073                                         /*
6074                                          * Link local make no sense without
6075                                          * scope
6076                                          */
6077                                         goto next_param;
6078                                 }
6079                                 sa = (struct sockaddr *)&sin6;
6080                                 inp = stcb->sctp_ep;
6081                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6082                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6083                                     local_sa, stcb);
6084                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6085                                 if (stcb_tmp == NULL &&
6086                                     (inp == stcb->sctp_ep || inp == NULL)) {
6087                                         /*
6088                                          * we must validate the state again
6089                                          * here
6090                                          */
6091                         add_it_now6:
6092                                         if (stcb->asoc.state == 0) {
6093                                                 /* the assoc was freed? */
6094                                                 return (-16);
6095                                         }
6096                                         /*
6097                                          * we must add the address, no scope
6098                                          * set
6099                                          */
6100                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6101                                                 return (-17);
6102                                         }
6103                                 } else if (stcb_tmp == stcb) {
6104                                         /*
6105                                          * we must validate the state again
6106                                          * here
6107                                          */
6108                                         if (stcb->asoc.state == 0) {
6109                                                 /* the assoc was freed? */
6110                                                 return (-19);
6111                                         }
6112                                         if (net != NULL) {
6113                                                 /* clear flag */
6114                                                 net->dest_state &=
6115                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6116                                         }
6117                                 } else {
6118                                         /*
6119                                          * strange, address is in another
6120                                          * assoc? straighten out locks.
6121                                          */
6122                                         if (stcb_tmp)
6123                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6124                                                         /*
6125                                                          * in setup state we
6126                                                          * abort this guy
6127                                                          */
6128                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6129                                                             stcb_tmp, 1, NULL, 0);
6130                                                         goto add_it_now6;
6131                                                 }
6132                                         SCTP_TCB_UNLOCK(stcb_tmp);
6133
6134                                         if (stcb->asoc.state == 0) {
6135                                                 /* the assoc was freed? */
6136                                                 return (-21);
6137                                         }
6138                                         return (-22);
6139                                 }
6140                         }
6141                 } else if (ptype == SCTP_ECN_CAPABLE) {
6142                         stcb->asoc.ecn_allowed = 1;
6143                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6144                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6145                                 struct sctp_adaptation_layer_indication ai,
6146                                                                 *aip;
6147
6148                                 phdr = sctp_get_next_param(m, offset,
6149                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6150                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6151                                 if (aip) {
6152                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6153                                         stcb->asoc.adaptation_needed = 1;
6154                                 }
6155                         }
6156                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6157                         struct sctp_asconf_addr_param lstore, *fee;
6158                         struct sctp_asconf_addrv4_param *fii;
6159                         int lptype;
6160                         struct sockaddr *lsa = NULL;
6161
6162                         stcb->asoc.peer_supports_asconf = 1;
6163                         if (plen > sizeof(lstore)) {
6164                                 return (-23);
6165                         }
6166                         phdr = sctp_get_next_param(m, offset,
6167                             (struct sctp_paramhdr *)&lstore,
6168                             min(plen, sizeof(lstore)));
6169                         if (phdr == NULL) {
6170                                 return (-24);
6171                         }
6172                         fee = (struct sctp_asconf_addr_param *)phdr;
6173                         lptype = ntohs(fee->addrp.ph.param_type);
6174                         if (lptype == SCTP_IPV4_ADDRESS) {
6175                                 if (plen !=
6176                                     sizeof(struct sctp_asconf_addrv4_param)) {
6177                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6178                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6179                                             plen);
6180                                 } else {
6181                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6182                                         sin.sin_addr.s_addr = fii->addrp.addr;
6183                                         lsa = (struct sockaddr *)&sin;
6184                                 }
6185                         } else if (lptype == SCTP_IPV6_ADDRESS) {
6186                                 if (plen !=
6187                                     sizeof(struct sctp_asconf_addr_param)) {
6188                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6189                                             (int)sizeof(struct sctp_asconf_addr_param),
6190                                             plen);
6191                                 } else {
6192                                         memcpy(sin6.sin6_addr.s6_addr,
6193                                             fee->addrp.addr,
6194                                             sizeof(fee->addrp.addr));
6195                                         lsa = (struct sockaddr *)&sin6;
6196                                 }
6197                         }
6198                         if (lsa) {
6199                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6200                         }
6201                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6202                         stcb->asoc.peer_supports_nat = 1;
6203                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6204                         /* Peer supports pr-sctp */
6205                         stcb->asoc.peer_supports_prsctp = 1;
6206                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6207                         /* A supported extension chunk */
6208                         struct sctp_supported_chunk_types_param *pr_supported;
6209                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6210                         int num_ent, i;
6211
6212                         phdr = sctp_get_next_param(m, offset,
6213                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6214                         if (phdr == NULL) {
6215                                 return (-25);
6216                         }
6217                         stcb->asoc.peer_supports_asconf = 0;
6218                         stcb->asoc.peer_supports_prsctp = 0;
6219                         stcb->asoc.peer_supports_pktdrop = 0;
6220                         stcb->asoc.peer_supports_strreset = 0;
6221                         stcb->asoc.peer_supports_nr_sack = 0;
6222                         stcb->asoc.peer_supports_auth = 0;
6223                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6224                         num_ent = plen - sizeof(struct sctp_paramhdr);
6225                         for (i = 0; i < num_ent; i++) {
6226                                 switch (pr_supported->chunk_types[i]) {
6227                                 case SCTP_ASCONF:
6228                                 case SCTP_ASCONF_ACK:
6229                                         stcb->asoc.peer_supports_asconf = 1;
6230                                         break;
6231                                 case SCTP_FORWARD_CUM_TSN:
6232                                         stcb->asoc.peer_supports_prsctp = 1;
6233                                         break;
6234                                 case SCTP_PACKET_DROPPED:
6235                                         stcb->asoc.peer_supports_pktdrop = 1;
6236                                         break;
6237                                 case SCTP_NR_SELECTIVE_ACK:
6238                                         stcb->asoc.peer_supports_nr_sack = 1;
6239                                         break;
6240                                 case SCTP_STREAM_RESET:
6241                                         stcb->asoc.peer_supports_strreset = 1;
6242                                         break;
6243                                 case SCTP_AUTHENTICATION:
6244                                         stcb->asoc.peer_supports_auth = 1;
6245                                         break;
6246                                 default:
6247                                         /* one I have not learned yet */
6248                                         break;
6249
6250                                 }
6251                         }
6252                 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
6253                         /* Peer supports ECN-nonce */
6254                         stcb->asoc.peer_supports_ecn_nonce = 1;
6255                         stcb->asoc.ecn_nonce_allowed = 1;
6256                 } else if (ptype == SCTP_RANDOM) {
6257                         if (plen > sizeof(random_store))
6258                                 break;
6259                         if (got_random) {
6260                                 /* already processed a RANDOM */
6261                                 goto next_param;
6262                         }
6263                         phdr = sctp_get_next_param(m, offset,
6264                             (struct sctp_paramhdr *)random_store,
6265                             min(sizeof(random_store), plen));
6266                         if (phdr == NULL)
6267                                 return (-26);
6268                         p_random = (struct sctp_auth_random *)phdr;
6269                         random_len = plen - sizeof(*p_random);
6270                         /* enforce the random length */
6271                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6272                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6273                                 return (-27);
6274                         }
6275                         got_random = 1;
6276                 } else if (ptype == SCTP_HMAC_LIST) {
6277                         int num_hmacs;
6278                         int i;
6279
6280                         if (plen > sizeof(hmacs_store))
6281                                 break;
6282                         if (got_hmacs) {
6283                                 /* already processed a HMAC list */
6284                                 goto next_param;
6285                         }
6286                         phdr = sctp_get_next_param(m, offset,
6287                             (struct sctp_paramhdr *)hmacs_store,
6288                             min(plen, sizeof(hmacs_store)));
6289                         if (phdr == NULL)
6290                                 return (-28);
6291                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6292                         hmacs_len = plen - sizeof(*hmacs);
6293                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6294                         /* validate the hmac list */
6295                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6296                                 return (-29);
6297                         }
6298                         if (stcb->asoc.peer_hmacs != NULL)
6299                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6300                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6301                         if (stcb->asoc.peer_hmacs != NULL) {
6302                                 for (i = 0; i < num_hmacs; i++) {
6303                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6304                                             ntohs(hmacs->hmac_ids[i]));
6305                                 }
6306                         }
6307                         got_hmacs = 1;
6308                 } else if (ptype == SCTP_CHUNK_LIST) {
6309                         int i;
6310
6311                         if (plen > sizeof(chunks_store))
6312                                 break;
6313                         if (got_chklist) {
6314                                 /* already processed a Chunks list */
6315                                 goto next_param;
6316                         }
6317                         phdr = sctp_get_next_param(m, offset,
6318                             (struct sctp_paramhdr *)chunks_store,
6319                             min(plen, sizeof(chunks_store)));
6320                         if (phdr == NULL)
6321                                 return (-30);
6322                         chunks = (struct sctp_auth_chunk_list *)phdr;
6323                         num_chunks = plen - sizeof(*chunks);
6324                         if (stcb->asoc.peer_auth_chunks != NULL)
6325                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6326                         else
6327                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6328                         for (i = 0; i < num_chunks; i++) {
6329                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6330                                     stcb->asoc.peer_auth_chunks);
6331                                 /* record asconf/asconf-ack if listed */
6332                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6333                                         saw_asconf = 1;
6334                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6335                                         saw_asconf_ack = 1;
6336
6337                         }
6338                         got_chklist = 1;
6339                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6340                             (ptype == SCTP_STATE_COOKIE) ||
6341                             (ptype == SCTP_UNRECOG_PARAM) ||
6342                             (ptype == SCTP_COOKIE_PRESERVE) ||
6343                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6344                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6345                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6346                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6347                     (ptype == SCTP_SUCCESS_REPORT)) {
6348                          /* don't care */ ;
6349                 } else {
6350                         if ((ptype & 0x8000) == 0x0000) {
6351                                 /*
6352                                  * must stop processing the rest of the
6353                                  * param's. Any report bits were handled
6354                                  * with the call to
6355                                  * sctp_arethere_unrecognized_parameters()
6356                                  * when the INIT or INIT-ACK was first seen.
6357                                  */
6358                                 break;
6359                         }
6360                 }
6361
6362 next_param:
6363                 offset += SCTP_SIZE32(plen);
6364                 if (offset >= limit) {
6365                         break;
6366                 }
6367                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6368                     sizeof(parm_buf));
6369         }
6370         /* Now check to see if we need to purge any addresses */
6371         for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
6372                 net_tmp = TAILQ_NEXT(net, sctp_next);
6373                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6374                     SCTP_ADDR_NOT_IN_ASSOC) {
6375                         /* This address has been removed from the asoc */
6376                         /* remove and free it */
6377                         stcb->asoc.numnets--;
6378                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6379                         sctp_free_remote_addr(net);
6380                         if (net == stcb->asoc.primary_destination) {
6381                                 stcb->asoc.primary_destination = NULL;
6382                                 sctp_select_primary_destination(stcb);
6383                         }
6384                 }
6385         }
6386         /* validate authentication required parameters */
6387         if (got_random && got_hmacs) {
6388                 stcb->asoc.peer_supports_auth = 1;
6389         } else {
6390                 stcb->asoc.peer_supports_auth = 0;
6391         }
6392         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6393                 /* peer does not support auth but sent a chunks list? */
6394                 return (-31);
6395         }
6396         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6397             !stcb->asoc.peer_supports_auth) {
6398                 /* peer supports asconf but not auth? */
6399                 return (-32);
6400         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6401             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6402                 return (-33);
6403         }
6404         /* concatenate the full random key */
6405         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6406         if (chunks != NULL) {
6407                 keylen += sizeof(*chunks) + num_chunks;
6408         }
6409         new_key = sctp_alloc_key(keylen);
6410         if (new_key != NULL) {
6411                 /* copy in the RANDOM */
6412                 if (p_random != NULL) {
6413                         keylen = sizeof(*p_random) + random_len;
6414                         bcopy(p_random, new_key->key, keylen);
6415                 }
6416                 /* append in the AUTH chunks */
6417                 if (chunks != NULL) {
6418                         bcopy(chunks, new_key->key + keylen,
6419                             sizeof(*chunks) + num_chunks);
6420                         keylen += sizeof(*chunks) + num_chunks;
6421                 }
6422                 /* append in the HMACs */
6423                 if (hmacs != NULL) {
6424                         bcopy(hmacs, new_key->key + keylen,
6425                             sizeof(*hmacs) + hmacs_len);
6426                 }
6427         } else {
6428                 /* failed to get memory for the key */
6429                 return (-34);
6430         }
6431         if (stcb->asoc.authinfo.peer_random != NULL)
6432                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6433         stcb->asoc.authinfo.peer_random = new_key;
6434         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6435         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6436
6437         return (0);
6438 }
6439
6440 int
6441 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6442     struct sctp_nets *net)
6443 {
6444         /* make sure the requested primary address exists in the assoc */
6445         if (net == NULL && sa)
6446                 net = sctp_findnet(stcb, sa);
6447
6448         if (net == NULL) {
6449                 /* didn't find the requested primary address! */
6450                 return (-1);
6451         } else {
6452                 /* set the primary address */
6453                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6454                         /* Must be confirmed, so queue to set */
6455                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6456                         return (0);
6457                 }
6458                 stcb->asoc.primary_destination = net;
6459                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6460                 net = TAILQ_FIRST(&stcb->asoc.nets);
6461                 if (net != stcb->asoc.primary_destination) {
6462                         /*
6463                          * first one on the list is NOT the primary
6464                          * sctp_cmpaddr() is much more efficent if the
6465                          * primary is the first on the list, make it so.
6466                          */
6467                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6468                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6469                 }
6470                 return (0);
6471         }
6472 }
6473
6474 int
6475 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6476 {
6477         /*
6478          * This function serves two purposes. It will see if a TAG can be
6479          * re-used and return 1 for yes it is ok and 0 for don't use that
6480          * tag. A secondary function it will do is purge out old tags that
6481          * can be removed.
6482          */
6483         struct sctpvtaghead *chain;
6484         struct sctp_tagblock *twait_block;
6485         struct sctpasochead *head;
6486         struct sctp_tcb *stcb;
6487         int i;
6488
6489         SCTP_INP_INFO_RLOCK();
6490         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6491             SCTP_BASE_INFO(hashasocmark))];
6492         if (head == NULL) {
6493                 /* invalid vtag */
6494                 goto skip_vtag_check;
6495         }
6496         LIST_FOREACH(stcb, head, sctp_asocs) {
6497                 /*
6498                  * We choose not to lock anything here. TCB's can't be
6499                  * removed since we have the read lock, so they can't be
6500                  * freed on us, same thing for the INP. I may be wrong with
6501                  * this assumption, but we will go with it for now :-)
6502                  */
6503                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6504                         continue;
6505                 }
6506                 if (stcb->asoc.my_vtag == tag) {
6507                         /* candidate */
6508                         if (stcb->rport != rport) {
6509                                 continue;
6510                         }
6511                         if (stcb->sctp_ep->sctp_lport != lport) {
6512                                 continue;
6513                         }
6514                         /* Its a used tag set */
6515                         SCTP_INP_INFO_RUNLOCK();
6516                         return (0);
6517                 }
6518         }
6519 skip_vtag_check:
6520
6521         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6522         /* Now what about timed wait ? */
6523         if (!LIST_EMPTY(chain)) {
6524                 /*
6525                  * Block(s) are present, lets see if we have this tag in the
6526                  * list
6527                  */
6528                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6529                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6530                                 if (twait_block->vtag_block[i].v_tag == 0) {
6531                                         /* not used */
6532                                         continue;
6533                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6534                                     now->tv_sec) {
6535                                         /* Audit expires this guy */
6536                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6537                                         twait_block->vtag_block[i].v_tag = 0;
6538                                         twait_block->vtag_block[i].lport = 0;
6539                                         twait_block->vtag_block[i].rport = 0;
6540                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6541                                             (twait_block->vtag_block[i].lport == lport) &&
6542                                     (twait_block->vtag_block[i].rport == rport)) {
6543                                         /* Bad tag, sorry :< */
6544                                         SCTP_INP_INFO_RUNLOCK();
6545                                         return (0);
6546                                 }
6547                         }
6548                 }
6549         }
6550         SCTP_INP_INFO_RUNLOCK();
6551         return (1);
6552 }
6553
6554
6555 static sctp_assoc_t reneged_asoc_ids[256];
6556 static uint8_t reneged_at = 0;
6557
6558
6559 static void
6560 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6561 {
6562         /*
6563          * We must hunt this association for MBUF's past the cumack (i.e.
6564          * out of order data that we can renege on).
6565          */
6566         struct sctp_association *asoc;
6567         struct sctp_tmit_chunk *chk, *nchk;
6568         uint32_t cumulative_tsn_p1;
6569         struct sctp_queued_to_read *ctl, *nctl;
6570         int cnt, strmat;
6571         uint32_t gap, i;
6572         int fnd = 0;
6573
6574         /* We look for anything larger than the cum-ack + 1 */
6575
6576         asoc = &stcb->asoc;
6577         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6578                 /* none we can reneg on. */
6579                 return;
6580         }
6581         SCTP_STAT_INCR(sctps_protocol_drains_done);
6582         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6583         cnt = 0;
6584         /* First look in the re-assembly queue */
6585         chk = TAILQ_FIRST(&asoc->reasmqueue);
6586         while (chk) {
6587                 /* Get the next one */
6588                 nchk = TAILQ_NEXT(chk, sctp_next);
6589                 if (compare_with_wrap(chk->rec.data.TSN_seq,
6590                     cumulative_tsn_p1, MAX_TSN)) {
6591                         /* Yep it is above cum-ack */
6592                         cnt++;
6593                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6594                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6595                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6596                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6597                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6598                         if (chk->data) {
6599                                 sctp_m_freem(chk->data);
6600                                 chk->data = NULL;
6601                         }
6602                         sctp_free_a_chunk(stcb, chk);
6603                 }
6604                 chk = nchk;
6605         }
6606         /* Ok that was fun, now we will drain all the inbound streams? */
6607         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6608                 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
6609                 while (ctl) {
6610                         nctl = TAILQ_NEXT(ctl, next);
6611                         if (compare_with_wrap(ctl->sinfo_tsn,
6612                             cumulative_tsn_p1, MAX_TSN)) {
6613                                 /* Yep it is above cum-ack */
6614                                 cnt++;
6615                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6616                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6617                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6618                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6619                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6620                                 if (ctl->data) {
6621                                         sctp_m_freem(ctl->data);
6622                                         ctl->data = NULL;
6623                                 }
6624                                 sctp_free_remote_addr(ctl->whoFrom);
6625                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6626                                 SCTP_DECR_READQ_COUNT();
6627                         }
6628                         ctl = nctl;
6629                 }
6630         }
6631         if (cnt) {
6632                 /* We must back down to see what the new highest is */
6633                 for (i = asoc->highest_tsn_inside_map;
6634                     (compare_with_wrap(i, asoc->mapping_array_base_tsn, MAX_TSN) || (i == asoc->mapping_array_base_tsn));
6635                     i--) {
6636                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6637                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6638                                 asoc->highest_tsn_inside_map = i;
6639                                 fnd = 1;
6640                                 break;
6641                         }
6642                 }
6643                 if (!fnd) {
6644                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6645                 }
6646                 /*
6647                  * Question, should we go through the delivery queue? The
6648                  * only reason things are on here is the app not reading OR
6649                  * a p-d-api up. An attacker COULD send enough in to
6650                  * initiate the PD-API and then send a bunch of stuff to
6651                  * other streams... these would wind up on the delivery
6652                  * queue.. and then we would not get to them. But in order
6653                  * to do this I then have to back-track and un-deliver
6654                  * sequence numbers in streams.. el-yucko. I think for now
6655                  * we will NOT look at the delivery queue and leave it to be
6656                  * something to consider later. An alternative would be to
6657                  * abort the P-D-API with a notification and then deliver
6658                  * the data.... Or another method might be to keep track of
6659                  * how many times the situation occurs and if we see a
6660                  * possible attack underway just abort the association.
6661                  */
6662 #ifdef SCTP_DEBUG
6663                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6664 #endif
6665                 /*
6666                  * Now do we need to find a new
6667                  * asoc->highest_tsn_inside_map?
6668                  */
6669                 asoc->last_revoke_count = cnt;
6670                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6671                 /* sa_ignore NO_NULL_CHK */
6672                 sctp_send_sack(stcb);
6673                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6674                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6675                 reneged_at++;
6676         }
6677         /*
6678          * Another issue, in un-setting the TSN's in the mapping array we
6679          * DID NOT adjust the higest_tsn marker.  This will cause one of two
6680          * things to occur. It may cause us to do extra work in checking for
6681          * our mapping array movement. More importantly it may cause us to
6682          * SACK every datagram. This may not be a bad thing though since we
6683          * will recover once we get our cum-ack above and all this stuff we
6684          * dumped recovered.
6685          */
6686 }
6687
6688 void
6689 sctp_drain()
6690 {
6691         /*
6692          * We must walk the PCB lists for ALL associations here. The system
6693          * is LOW on MBUF's and needs help. This is where reneging will
6694          * occur. We really hope this does NOT happen!
6695          */
6696         VNET_ITERATOR_DECL(vnet_iter);
6697         VNET_LIST_RLOCK_NOSLEEP();
6698         VNET_FOREACH(vnet_iter) {
6699                 CURVNET_SET(vnet_iter);
6700                 struct sctp_inpcb *inp;
6701                 struct sctp_tcb *stcb;
6702
6703                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6704                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6705 #ifdef VIMAGE
6706                         continue;
6707 #else
6708                         return;
6709 #endif
6710                 }
6711                 SCTP_INP_INFO_RLOCK();
6712                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6713                         /* For each endpoint */
6714                         SCTP_INP_RLOCK(inp);
6715                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6716                                 /* For each association */
6717                                 SCTP_TCB_LOCK(stcb);
6718                                 sctp_drain_mbufs(inp, stcb);
6719                                 SCTP_TCB_UNLOCK(stcb);
6720                         }
6721                         SCTP_INP_RUNLOCK(inp);
6722                 }
6723                 SCTP_INP_INFO_RUNLOCK();
6724                 CURVNET_RESTORE();
6725         }
6726         VNET_LIST_RUNLOCK_NOSLEEP();
6727 }
6728
6729 /*
6730  * start a new iterator
6731  * iterates through all endpoints and associations based on the pcb_state
6732  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6733  * assocs and "ef" (optional) is executed when the iterator completes.
6734  * "inpf" (optional) is executed for each new endpoint as it is being
6735  * iterated through. inpe (optional) is called when the inp completes
6736  * its way through all the stcbs.
6737  */
6738 int
6739 sctp_initiate_iterator(inp_func inpf,
6740     asoc_func af,
6741     inp_func inpe,
6742     uint32_t pcb_state,
6743     uint32_t pcb_features,
6744     uint32_t asoc_state,
6745     void *argp,
6746     uint32_t argi,
6747     end_func ef,
6748     struct sctp_inpcb *s_inp,
6749     uint8_t chunk_output_off)
6750 {
6751         struct sctp_iterator *it = NULL;
6752
6753         if (af == NULL) {
6754                 return (-1);
6755         }
6756         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6757             SCTP_M_ITER);
6758         if (it == NULL) {
6759                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6760                 return (ENOMEM);
6761         }
6762         memset(it, 0, sizeof(*it));
6763         it->function_assoc = af;
6764         it->function_inp = inpf;
6765         if (inpf)
6766                 it->done_current_ep = 0;
6767         else
6768                 it->done_current_ep = 1;
6769         it->function_atend = ef;
6770         it->pointer = argp;
6771         it->val = argi;
6772         it->pcb_flags = pcb_state;
6773         it->pcb_features = pcb_features;
6774         it->asoc_state = asoc_state;
6775         it->function_inp_end = inpe;
6776         it->no_chunk_output = chunk_output_off;
6777         it->vn = curvnet;
6778         if (s_inp) {
6779                 /* Assume lock is held here */
6780                 it->inp = s_inp;
6781                 SCTP_INP_INCR_REF(it->inp);
6782                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6783         } else {
6784                 SCTP_INP_INFO_RLOCK();
6785                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6786                 if (it->inp) {
6787                         SCTP_INP_INCR_REF(it->inp);
6788                 }
6789                 SCTP_INP_INFO_RUNLOCK();
6790                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6791
6792         }
6793         SCTP_IPI_ITERATOR_WQ_LOCK();
6794
6795         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6796         if (sctp_it_ctl.iterator_running == 0) {
6797                 sctp_wakeup_iterator();
6798         }
6799         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6800         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6801         return (0);
6802 }