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