sys/netinet/sctp_pcb.c

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