sys/netinet/sctp_pcb.c

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