sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #include <netinet/sctp_dtrace_define.h>
  51 #include <netinet/udp.h>
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99
 100         SCTP_INP_INFO_RUNLOCK();
 101 }
 102
 103 /*
 104  * Addresses are added to VRF's (Virtual Router's). For BSD we
 105  * have only the default VRF 0. We maintain a hash list of
 106  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 107  * these has a list of addresses. When we add a new address
 108  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 109  * not exist we create it and add it to the list of IFN's
 110  * within the VRF. Once we have the sctp_ifn, we add the
 111  * address to the list. So we look something like:
 112  *
 113  * hash-vrf-table
 114  *   vrf-> ifn-> ifn -> ifn
 115  *   vrf    |
 116  *    ...   +--ifa-> ifa -> ifa
 117  *   vrf
 118  *
 119  * We keep these separate lists since the SCTP subsystem will
 120  * point to these from its source address selection nets structure.
 121  * When an address is deleted it does not happen right away on
 122  * the SCTP side, it gets scheduled. What we do when a
 123  * delete happens is immediately remove the address from
 124  * the master list and decrement the refcount. As our
 125  * addip iterator works through and frees the src address
 126  * selection pointing to the sctp_ifa, eventually the refcount
 127  * will reach 0 and we will delete it. Note that it is assumed
 128  * that any locking on system level ifn/ifa is done at the
 129  * caller of these functions and these routines will only
 130  * lock the SCTP structures as they add or delete things.
 131  *
 132  * Other notes on VRF concepts.
 133  *  - An endpoint can be in multiple VRF's
 134  *  - An association lives within a VRF and only one VRF.
 135  *  - Any incoming packet we can deduce the VRF for by
 136  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 137  *  - Any downward send call or connect call must supply the
 138  *    VRF via ancillary data or via some sort of set default
 139  *    VRF socket option call (again for BSD no brainer since
 140  *    the VRF is always 0).
 141  *  - An endpoint may add multiple VRF's to it.
 142  *  - Listening sockets can accept associations in any
 143  *    of the VRF's they are in but the assoc will end up
 144  *    in only one VRF (gotten from the packet or connect/send).
 145  *
 146  */
 147
 148 struct sctp_vrf *
 149 sctp_allocate_vrf(int vrf_id)
 150 {
 151         struct sctp_vrf *vrf = NULL;
 152         struct sctp_vrflist *bucket;
 153
 154         /* First allocate the VRF structure */
 155         vrf = sctp_find_vrf(vrf_id);
 156         if (vrf) {
 157                 /* Already allocated */
 158                 return (vrf);
 159         }
 160         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 161             SCTP_M_VRF);
 162         if (vrf == NULL) {
 163                 /* No memory */
 164 #ifdef INVARIANTS
 165                 panic("No memory for VRF:%d", vrf_id);
 166 #endif
 167                 return (NULL);
 168         }
 169         /* setup the VRF */
 170         memset(vrf, 0, sizeof(struct sctp_vrf));
 171         vrf->vrf_id = vrf_id;
 172         LIST_INIT(&vrf->ifnlist);
 173         vrf->total_ifa_count = 0;
 174         vrf->refcount = 0;
 175         /* now also setup table ids */
 176         SCTP_INIT_VRF_TABLEID(vrf);
 177         /* Init the HASH of addresses */
 178         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 179             &vrf->vrf_addr_hashmark);
 180         if (vrf->vrf_addr_hash == NULL) {
 181                 /* No memory */
 182 #ifdef INVARIANTS
 183                 panic("No memory for VRF:%d", vrf_id);
 184 #endif
 185                 SCTP_FREE(vrf, SCTP_M_VRF);
 186                 return (NULL);
 187         }
 188         /* Add it to the hash table */
 189         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 190         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 191         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 192         return (vrf);
 193 }
 194
 195
 196 struct sctp_ifn *
 197 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 198 {
 199         struct sctp_ifn *sctp_ifnp;
 200         struct sctp_ifnlist *hash_ifn_head;
 201
 202         /*
 203          * We assume the lock is held for the addresses if that's wrong
 204          * problems could occur :-)
 205          */
 206         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 207         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 208                 if (sctp_ifnp->ifn_index == ifn_index) {
 209                         return (sctp_ifnp);
 210                 }
 211                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 212                         return (sctp_ifnp);
 213                 }
 214         }
 215         return (NULL);
 216 }
 217
 218
 219
 220 struct sctp_vrf *
 221 sctp_find_vrf(uint32_t vrf_id)
 222 {
 223         struct sctp_vrflist *bucket;
 224         struct sctp_vrf *liste;
 225
 226         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 227         LIST_FOREACH(liste, bucket, next_vrf) {
 228                 if (vrf_id == liste->vrf_id) {
 229                         return (liste);
 230                 }
 231         }
 232         return (NULL);
 233 }
 234
 235 void
 236 sctp_free_vrf(struct sctp_vrf *vrf)
 237 {
 238         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 239                 if (vrf->vrf_addr_hash) {
 240                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 241                         vrf->vrf_addr_hash = NULL;
 242                 }
 243                 /* We zero'd the count */
 244                 LIST_REMOVE(vrf, next_vrf);
 245                 SCTP_FREE(vrf, SCTP_M_VRF);
 246                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 247         }
 248 }
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263 void
 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 265 {
 266         struct sctp_ifn *sctp_ifnp;
 267
 268         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 269         if (sctp_ifnp != NULL) {
 270                 sctp_ifnp->ifn_mtu = mtu;
 271         }
 272 }
 273
 274
 275 void
 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 277 {
 278         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 279                 /* We zero'd the count */
 280                 if (sctp_ifap->ifn_p) {
 281                         sctp_free_ifn(sctp_ifap->ifn_p);
 282                 }
 283                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 284                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 285         }
 286 }
 287
 288 static void
 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 290 {
 291         struct sctp_ifn *found;
 292
 293         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 294         if (found == NULL) {
 295                 /* Not in the list.. sorry */
 296                 return;
 297         }
 298         if (hold_addr_lock == 0)
 299                 SCTP_IPI_ADDR_WLOCK();
 300         LIST_REMOVE(sctp_ifnp, next_bucket);
 301         LIST_REMOVE(sctp_ifnp, next_ifn);
 302         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 303             sctp_ifnp->registered_af);
 304         if (hold_addr_lock == 0)
 305                 SCTP_IPI_ADDR_WUNLOCK();
 306         /* Take away the reference, and possibly free it */
 307         sctp_free_ifn(sctp_ifnp);
 308 }
 309
 310 void
 311 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 312     const char *if_name, uint32_t ifn_index)
 313 {
 314         struct sctp_vrf *vrf;
 315         struct sctp_ifa *sctp_ifap = NULL;
 316
 317         SCTP_IPI_ADDR_RLOCK();
 318         vrf = sctp_find_vrf(vrf_id);
 319         if (vrf == NULL) {
 320                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 321                 goto out;
 322
 323         }
 324         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 325         if (sctp_ifap == NULL) {
 326                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 327                 goto out;
 328         }
 329         if (sctp_ifap->ifn_p == NULL) {
 330                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 331                 goto out;
 332         }
 333         if (if_name) {
 334                 int len1, len2;
 335
 336                 len1 = strlen(if_name);
 337                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 338                 if (len1 != len2) {
 339                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 340                             len1, len2);
 341                         goto out;
 342                 }
 343                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 344                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 345                             sctp_ifap->ifn_p->ifn_name,
 346                             if_name);
 347                         goto out;
 348                 }
 349         } else {
 350                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 351                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 352                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 353                         goto out;
 354                 }
 355         }
 356
 357         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 358         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 359 out:
 360         SCTP_IPI_ADDR_RUNLOCK();
 361 }
 362
 363 void
 364 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 365     const char *if_name, uint32_t ifn_index)
 366 {
 367         struct sctp_vrf *vrf;
 368         struct sctp_ifa *sctp_ifap = NULL;
 369
 370         SCTP_IPI_ADDR_RLOCK();
 371         vrf = sctp_find_vrf(vrf_id);
 372         if (vrf == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 374                 goto out;
 375
 376         }
 377         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 378         if (sctp_ifap == NULL) {
 379                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 380                 goto out;
 381         }
 382         if (sctp_ifap->ifn_p == NULL) {
 383                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 384                 goto out;
 385         }
 386         if (if_name) {
 387                 int len1, len2;
 388
 389                 len1 = strlen(if_name);
 390                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 391                 if (len1 != len2) {
 392                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 393                             len1, len2);
 394                         goto out;
 395                 }
 396                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 397                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 398                             sctp_ifap->ifn_p->ifn_name,
 399                             if_name);
 400                         goto out;
 401                 }
 402         } else {
 403                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 404                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 405                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 406                         goto out;
 407                 }
 408         }
 409
 410         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 411         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 412 out:
 413         SCTP_IPI_ADDR_RUNLOCK();
 414 }
 415
 416 /*-
 417  * Add an ifa to an ifn.
 418  * Register the interface as necessary.
 419  * NOTE: ADDR write lock MUST be held.
 420  */
 421 static void
 422 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 423 {
 424         int ifa_af;
 425
 426         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 427         sctp_ifap->ifn_p = sctp_ifnp;
 428         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 429         /* update address counts */
 430         sctp_ifnp->ifa_count++;
 431         ifa_af = sctp_ifap->address.sa.sa_family;
 432         switch (ifa_af) {
 433 #ifdef INET
 434         case AF_INET:
 435                 sctp_ifnp->num_v4++;
 436                 break;
 437 #endif
 438 #ifdef INET6
 439         case AF_INET6:
 440                 sctp_ifnp->num_v6++;
 441                 break;
 442 #endif
 443         default:
 444                 break;
 445         }
 446         if (sctp_ifnp->ifa_count == 1) {
 447                 /* register the new interface */
 448                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 449                 sctp_ifnp->registered_af = ifa_af;
 450         }
 451 }
 452
 453 /*-
 454  * Remove an ifa from its ifn.
 455  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 456  * the interface based on the remaining address families left.
 457  * NOTE: ADDR write lock MUST be held.
 458  */
 459 static void
 460 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 461 {
 462         LIST_REMOVE(sctp_ifap, next_ifa);
 463         if (sctp_ifap->ifn_p) {
 464                 /* update address counts */
 465                 sctp_ifap->ifn_p->ifa_count--;
 466                 switch (sctp_ifap->address.sa.sa_family) {
 467 #ifdef INET
 468                 case AF_INET:
 469                         sctp_ifap->ifn_p->num_v4--;
 470                         break;
 471 #endif
 472 #ifdef INET6
 473                 case AF_INET6:
 474                         sctp_ifap->ifn_p->num_v6--;
 475                         break;
 476 #endif
 477                 default:
 478                         break;
 479                 }
 480
 481                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 482                         /* remove the ifn, possibly freeing it */
 483                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 484                 } else {
 485                         /* re-register address family type, if needed */
 486                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 487                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 488                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 489                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 490                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 491                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 492                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 493                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 494                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 495                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 496                         }
 497                         /* free the ifn refcount */
 498                         sctp_free_ifn(sctp_ifap->ifn_p);
 499                 }
 500                 sctp_ifap->ifn_p = NULL;
 501         }
 502 }
 503
 504 struct sctp_ifa *
 505 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 506     uint32_t ifn_type, const char *if_name, void *ifa,
 507     struct sockaddr *addr, uint32_t ifa_flags,
 508     int dynamic_add)
 509 {
 510         struct sctp_vrf *vrf;
 511         struct sctp_ifn *sctp_ifnp = NULL;
 512         struct sctp_ifa *sctp_ifap = NULL;
 513         struct sctp_ifalist *hash_addr_head;
 514         struct sctp_ifnlist *hash_ifn_head;
 515         uint32_t hash_of_addr;
 516         int new_ifn_af = 0;
 517
 518 #ifdef SCTP_DEBUG
 519         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 520         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 521 #endif
 522         SCTP_IPI_ADDR_WLOCK();
 523         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 524         if (sctp_ifnp) {
 525                 vrf = sctp_ifnp->vrf;
 526         } else {
 527                 vrf = sctp_find_vrf(vrf_id);
 528                 if (vrf == NULL) {
 529                         vrf = sctp_allocate_vrf(vrf_id);
 530                         if (vrf == NULL) {
 531                                 SCTP_IPI_ADDR_WUNLOCK();
 532                                 return (NULL);
 533                         }
 534                 }
 535         }
 536         if (sctp_ifnp == NULL) {
 537                 /*
 538                  * build one and add it, can't hold lock until after malloc
 539                  * done though.
 540                  */
 541                 SCTP_IPI_ADDR_WUNLOCK();
 542                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 543                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 544                 if (sctp_ifnp == NULL) {
 545 #ifdef INVARIANTS
 546                         panic("No memory for IFN");
 547 #endif
 548                         return (NULL);
 549                 }
 550                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 551                 sctp_ifnp->ifn_index = ifn_index;
 552                 sctp_ifnp->ifn_p = ifn;
 553                 sctp_ifnp->ifn_type = ifn_type;
 554                 sctp_ifnp->refcount = 0;
 555                 sctp_ifnp->vrf = vrf;
 556                 atomic_add_int(&vrf->refcount, 1);
 557                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 558                 if (if_name != NULL) {
 559                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 560                 } else {
 561                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 562                 }
 563                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 564                 LIST_INIT(&sctp_ifnp->ifalist);
 565                 SCTP_IPI_ADDR_WLOCK();
 566                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 567                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 568                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 569                 new_ifn_af = 1;
 570         }
 571         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 572         if (sctp_ifap) {
 573                 /* Hmm, it already exists? */
 574                 if ((sctp_ifap->ifn_p) &&
 575                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 576                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 577                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 578                             sctp_ifap);
 579                         if (new_ifn_af) {
 580                                 /* Remove the created one that we don't want */
 581                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 582                         }
 583                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 584                                 /* easy to solve, just switch back to active */
 585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 586                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 587                                 sctp_ifap->ifn_p = sctp_ifnp;
 588                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 589                         }
 590         exit_stage_left:
 591                         SCTP_IPI_ADDR_WUNLOCK();
 592                         return (sctp_ifap);
 593                 } else {
 594                         if (sctp_ifap->ifn_p) {
 595                                 /*
 596                                  * The last IFN gets the address, remove the
 597                                  * old one
 598                                  */
 599                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 600                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 601                                     sctp_ifap->ifn_p->ifn_index, if_name,
 602                                     ifn_index);
 603                                 /* remove the address from the old ifn */
 604                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 605                                 /* move the address over to the new ifn */
 606                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 607                                 goto exit_stage_left;
 608                         } else {
 609                                 /* repair ifnp which was NULL ? */
 610                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 611                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 612                                     sctp_ifnp, sctp_ifap);
 613                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 614                         }
 615                         goto exit_stage_left;
 616                 }
 617         }
 618         SCTP_IPI_ADDR_WUNLOCK();
 619         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 620         if (sctp_ifap == NULL) {
 621 #ifdef INVARIANTS
 622                 panic("No memory for IFA");
 623 #endif
 624                 return (NULL);
 625         }
 626         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 627         sctp_ifap->ifn_p = sctp_ifnp;
 628         atomic_add_int(&sctp_ifnp->refcount, 1);
 629         sctp_ifap->vrf_id = vrf_id;
 630         sctp_ifap->ifa = ifa;
 631         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 632         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 633         sctp_ifap->flags = ifa_flags;
 634         /* Set scope */
 635         switch (sctp_ifap->address.sa.sa_family) {
 636 #ifdef INET
 637         case AF_INET:
 638                 {
 639                         struct sockaddr_in *sin;
 640
 641                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 642                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 643                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 644                                 sctp_ifap->src_is_loop = 1;
 645                         }
 646                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 647                                 sctp_ifap->src_is_priv = 1;
 648                         }
 649                         sctp_ifnp->num_v4++;
 650                         if (new_ifn_af)
 651                                 new_ifn_af = AF_INET;
 652                         break;
 653                 }
 654 #endif
 655 #ifdef INET6
 656         case AF_INET6:
 657                 {
 658                         /* ok to use deprecated addresses? */
 659                         struct sockaddr_in6 *sin6;
 660
 661                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 662                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 663                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 664                                 sctp_ifap->src_is_loop = 1;
 665                         }
 666                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 667                                 sctp_ifap->src_is_priv = 1;
 668                         }
 669                         sctp_ifnp->num_v6++;
 670                         if (new_ifn_af)
 671                                 new_ifn_af = AF_INET6;
 672                         break;
 673                 }
 674 #endif
 675         default:
 676                 new_ifn_af = 0;
 677                 break;
 678         }
 679         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 680
 681         if ((sctp_ifap->src_is_priv == 0) &&
 682             (sctp_ifap->src_is_loop == 0)) {
 683                 sctp_ifap->src_is_glob = 1;
 684         }
 685         SCTP_IPI_ADDR_WLOCK();
 686         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 687         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 688         sctp_ifap->refcount = 1;
 689         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 690         sctp_ifnp->ifa_count++;
 691         vrf->total_ifa_count++;
 692         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 693         if (new_ifn_af) {
 694                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 695                 sctp_ifnp->registered_af = new_ifn_af;
 696         }
 697         SCTP_IPI_ADDR_WUNLOCK();
 698         if (dynamic_add) {
 699                 /*
 700                  * Bump up the refcount so that when the timer completes it
 701                  * will drop back down.
 702                  */
 703                 struct sctp_laddr *wi;
 704
 705                 atomic_add_int(&sctp_ifap->refcount, 1);
 706                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 707                 if (wi == NULL) {
 708                         /*
 709                          * Gak, what can we do? We have lost an address
 710                          * change can you say HOSED?
 711                          */
 712                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 713                         /* Opps, must decrement the count */
 714                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 715                             if_name);
 716                         return (NULL);
 717                 }
 718                 SCTP_INCR_LADDR_COUNT();
 719                 bzero(wi, sizeof(*wi));
 720                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 721                 wi->ifa = sctp_ifap;
 722                 wi->action = SCTP_ADD_IP_ADDRESS;
 723
 724                 SCTP_WQ_ADDR_LOCK();
 725                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 726                 SCTP_WQ_ADDR_UNLOCK();
 727
 728                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 729                     (struct sctp_inpcb *)NULL,
 730                     (struct sctp_tcb *)NULL,
 731                     (struct sctp_nets *)NULL);
 732         } else {
 733                 /* it's ready for use */
 734                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 735         }
 736         return (sctp_ifap);
 737 }
 738
 739 void
 740 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 741     uint32_t ifn_index, const char *if_name)
 742 {
 743         struct sctp_vrf *vrf;
 744         struct sctp_ifa *sctp_ifap = NULL;
 745
 746         SCTP_IPI_ADDR_WLOCK();
 747         vrf = sctp_find_vrf(vrf_id);
 748         if (vrf == NULL) {
 749                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 750                 goto out_now;
 751         }
 752 #ifdef SCTP_DEBUG
 753         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 754         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 755 #endif
 756         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 757         if (sctp_ifap) {
 758                 /* Validate the delete */
 759                 if (sctp_ifap->ifn_p) {
 760                         int valid = 0;
 761
 762                         /*-
 763                          * The name has priority over the ifn_index
 764                          * if its given. We do this especially for
 765                          * panda who might recycle indexes fast.
 766                          */
 767                         if (if_name) {
 768                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 769                                         /* They match its a correct delete */
 770                                         valid = 1;
 771                                 }
 772                         }
 773                         if (!valid) {
 774                                 /* last ditch check ifn_index */
 775                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 776                                         valid = 1;
 777                                 }
 778                         }
 779                         if (!valid) {
 780                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 781                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 782                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 783                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 784                                 SCTP_IPI_ADDR_WUNLOCK();
 785                                 return;
 786                         }
 787                 }
 788                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 789                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 790                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 791                 vrf->total_ifa_count--;
 792                 LIST_REMOVE(sctp_ifap, next_bucket);
 793                 sctp_remove_ifa_from_ifn(sctp_ifap);
 794         }
 795 #ifdef SCTP_DEBUG
 796         else {
 797                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 798                     ifn_index);
 799                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 800         }
 801 #endif
 802
 803 out_now:
 804         SCTP_IPI_ADDR_WUNLOCK();
 805         if (sctp_ifap) {
 806                 struct sctp_laddr *wi;
 807
 808                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 809                 if (wi == NULL) {
 810                         /*
 811                          * Gak, what can we do? We have lost an address
 812                          * change can you say HOSED?
 813                          */
 814                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 815
 816                         /* Oops, must decrement the count */
 817                         sctp_free_ifa(sctp_ifap);
 818                         return;
 819                 }
 820                 SCTP_INCR_LADDR_COUNT();
 821                 bzero(wi, sizeof(*wi));
 822                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 823                 wi->ifa = sctp_ifap;
 824                 wi->action = SCTP_DEL_IP_ADDRESS;
 825                 SCTP_WQ_ADDR_LOCK();
 826                 /*
 827                  * Should this really be a tailq? As it is we will process
 828                  * the newest first :-0
 829                  */
 830                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 831                 SCTP_WQ_ADDR_UNLOCK();
 832
 833                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 834                     (struct sctp_inpcb *)NULL,
 835                     (struct sctp_tcb *)NULL,
 836                     (struct sctp_nets *)NULL);
 837         }
 838         return;
 839 }
 840
 841
 842 static struct sctp_tcb *
 843 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 844     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 845 {
 846         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 847         /*
 848          * If we support the TCP model, then we must now dig through to see
 849          * if we can find our endpoint in the list of tcp ep's.
 850          */
 851         uint16_t lport, rport;
 852         struct sctppcbhead *ephead;
 853         struct sctp_inpcb *inp;
 854         struct sctp_laddr *laddr;
 855         struct sctp_tcb *stcb;
 856         struct sctp_nets *net;
 857
 858         if ((to == NULL) || (from == NULL)) {
 859                 return (NULL);
 860         }
 861         switch (to->sa_family) {
 862 #ifdef INET
 863         case AF_INET:
 864                 if (from->sa_family == AF_INET) {
 865                         lport = ((struct sockaddr_in *)to)->sin_port;
 866                         rport = ((struct sockaddr_in *)from)->sin_port;
 867                 } else {
 868                         return (NULL);
 869                 }
 870                 break;
 871 #endif
 872 #ifdef INET6
 873         case AF_INET6:
 874                 if (from->sa_family == AF_INET6) {
 875                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 876                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 877                 } else {
 878                         return (NULL);
 879                 }
 880                 break;
 881 #endif
 882         default:
 883                 return (NULL);
 884         }
 885         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 886         /*
 887          * Ok now for each of the guys in this bucket we must look and see:
 888          * - Does the remote port match. - Does there single association's
 889          * addresses match this address (to). If so we update p_ep to point
 890          * to this ep and return the tcb from it.
 891          */
 892         LIST_FOREACH(inp, ephead, sctp_hash) {
 893                 SCTP_INP_RLOCK(inp);
 894                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 895                         SCTP_INP_RUNLOCK(inp);
 896                         continue;
 897                 }
 898                 if (lport != inp->sctp_lport) {
 899                         SCTP_INP_RUNLOCK(inp);
 900                         continue;
 901                 }
 902                 if (inp->def_vrf_id != vrf_id) {
 903                         SCTP_INP_RUNLOCK(inp);
 904                         continue;
 905                 }
 906                 /* check to see if the ep has one of the addresses */
 907                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 908                         /* We are NOT bound all, so look further */
 909                         int match = 0;
 910
 911                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 912
 913                                 if (laddr->ifa == NULL) {
 914                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 915                                         continue;
 916                                 }
 917                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 918                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 919                                         continue;
 920                                 }
 921                                 if (laddr->ifa->address.sa.sa_family ==
 922                                     to->sa_family) {
 923                                         /* see if it matches */
 924
 925 #ifdef INET
 926                                         if (from->sa_family == AF_INET) {
 927                                                 struct sockaddr_in *intf_addr,
 928                                                            *sin;
 929
 930                                                 intf_addr = &laddr->ifa->address.sin;
 931                                                 sin = (struct sockaddr_in *)to;
 932                                                 if (sin->sin_addr.s_addr ==
 933                                                     intf_addr->sin_addr.s_addr) {
 934                                                         match = 1;
 935                                                         break;
 936                                                 }
 937                                         }
 938 #endif
 939 #ifdef INET6
 940                                         if (from->sa_family == AF_INET6) {
 941                                                 struct sockaddr_in6 *intf_addr6;
 942                                                 struct sockaddr_in6 *sin6;
 943
 944                                                 sin6 = (struct sockaddr_in6 *)
 945                                                     to;
 946                                                 intf_addr6 = &laddr->ifa->address.sin6;
 947
 948                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 949                                                     intf_addr6)) {
 950                                                         match = 1;
 951                                                         break;
 952                                                 }
 953                                         }
 954 #endif
 955                                 }
 956                         }
 957                         if (match == 0) {
 958                                 /* This endpoint does not have this address */
 959                                 SCTP_INP_RUNLOCK(inp);
 960                                 continue;
 961                         }
 962                 }
 963                 /*
 964                  * Ok if we hit here the ep has the address, does it hold
 965                  * the tcb?
 966                  */
 967
 968                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 969                 if (stcb == NULL) {
 970                         SCTP_INP_RUNLOCK(inp);
 971                         continue;
 972                 }
 973                 SCTP_TCB_LOCK(stcb);
 974                 if (stcb->rport != rport) {
 975                         /* remote port does not match. */
 976                         SCTP_TCB_UNLOCK(stcb);
 977                         SCTP_INP_RUNLOCK(inp);
 978                         continue;
 979                 }
 980                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 981                         SCTP_TCB_UNLOCK(stcb);
 982                         SCTP_INP_RUNLOCK(inp);
 983                         continue;
 984                 }
 985                 /* Does this TCB have a matching address? */
 986                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 987
 988                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 989                                 /* not the same family, can't be a match */
 990                                 continue;
 991                         }
 992                         switch (from->sa_family) {
 993 #ifdef INET
 994                         case AF_INET:
 995                                 {
 996                                         struct sockaddr_in *sin, *rsin;
 997
 998                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 999                                         rsin = (struct sockaddr_in *)from;
1000                                         if (sin->sin_addr.s_addr ==
1001                                             rsin->sin_addr.s_addr) {
1002                                                 /* found it */
1003                                                 if (netp != NULL) {
1004                                                         *netp = net;
1005                                                 }
1006                                                 /*
1007                                                  * Update the endpoint
1008                                                  * pointer
1009                                                  */
1010                                                 *inp_p = inp;
1011                                                 SCTP_INP_RUNLOCK(inp);
1012                                                 return (stcb);
1013                                         }
1014                                         break;
1015                                 }
1016 #endif
1017 #ifdef INET6
1018                         case AF_INET6:
1019                                 {
1020                                         struct sockaddr_in6 *sin6, *rsin6;
1021
1022                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1023                                         rsin6 = (struct sockaddr_in6 *)from;
1024                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1025                                             rsin6)) {
1026                                                 /* found it */
1027                                                 if (netp != NULL) {
1028                                                         *netp = net;
1029                                                 }
1030                                                 /*
1031                                                  * Update the endpoint
1032                                                  * pointer
1033                                                  */
1034                                                 *inp_p = inp;
1035                                                 SCTP_INP_RUNLOCK(inp);
1036                                                 return (stcb);
1037                                         }
1038                                         break;
1039                                 }
1040 #endif
1041                         default:
1042                                 /* TSNH */
1043                                 break;
1044                         }
1045                 }
1046                 SCTP_TCB_UNLOCK(stcb);
1047                 SCTP_INP_RUNLOCK(inp);
1048         }
1049         return (NULL);
1050 }
1051
1052 static int
1053 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1054 {
1055         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1056         int ipv4_addr_legal, ipv6_addr_legal;
1057         struct sctp_vrf *vrf;
1058         struct sctp_ifn *sctp_ifn;
1059         struct sctp_ifa *sctp_ifa;
1060
1061         loopback_scope = stcb->asoc.loopback_scope;
1062         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1063         local_scope = stcb->asoc.local_scope;
1064         site_scope = stcb->asoc.site_scope;
1065         ipv4_addr_legal = ipv6_addr_legal = 0;
1066         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1067                 ipv6_addr_legal = 1;
1068                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1069                         ipv4_addr_legal = 1;
1070                 }
1071         } else {
1072                 ipv4_addr_legal = 1;
1073         }
1074
1075         SCTP_IPI_ADDR_RLOCK();
1076         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1077         if (vrf == NULL) {
1078                 /* no vrf, no addresses */
1079                 SCTP_IPI_ADDR_RUNLOCK();
1080                 return (0);
1081         }
1082         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1083                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1084                         if ((loopback_scope == 0) &&
1085                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1086                                 continue;
1087                         }
1088                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1089                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
1090                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
1091                                         /*
1092                                          * We allow pending addresses, where
1093                                          * we have sent an asconf-add to be
1094                                          * considered valid.
1095                                          */
1096                                         continue;
1097                                 }
1098                                 switch (sctp_ifa->address.sa.sa_family) {
1099 #ifdef INET
1100                                 case AF_INET:
1101                                         if (ipv4_addr_legal) {
1102                                                 struct sockaddr_in *sin,
1103                                                            *rsin;
1104
1105                                                 sin = &sctp_ifa->address.sin;
1106                                                 rsin = (struct sockaddr_in *)to;
1107                                                 if ((ipv4_local_scope == 0) &&
1108                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1109                                                         continue;
1110                                                 }
1111                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1112                                                         SCTP_IPI_ADDR_RUNLOCK();
1113                                                         return (1);
1114                                                 }
1115                                         }
1116                                         break;
1117 #endif
1118 #ifdef INET6
1119                                 case AF_INET6:
1120                                         if (ipv6_addr_legal) {
1121                                                 struct sockaddr_in6 *sin6,
1122                                                             *rsin6;
1123
1124                                                 sin6 = &sctp_ifa->address.sin6;
1125                                                 rsin6 = (struct sockaddr_in6 *)to;
1126                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1127                                                         if (local_scope == 0)
1128                                                                 continue;
1129                                                         if (sin6->sin6_scope_id == 0) {
1130                                                                 if (sa6_recoverscope(sin6) != 0)
1131                                                                         continue;
1132                                                         }
1133                                                 }
1134                                                 if ((site_scope == 0) &&
1135                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1136                                                         continue;
1137                                                 }
1138                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1139                                                         SCTP_IPI_ADDR_RUNLOCK();
1140                                                         return (1);
1141                                                 }
1142                                         }
1143                                         break;
1144 #endif
1145                                 default:
1146                                         /* TSNH */
1147                                         break;
1148                                 }
1149                         }
1150                 }
1151         } else {
1152                 struct sctp_laddr *laddr;
1153
1154                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1155                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1156                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1157                                 /*
1158                                  * We allow pending addresses, where we have
1159                                  * sent an asconf-add to be considered
1160                                  * valid.
1161                                  */
1162                                 continue;
1163                         }
1164                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1165                                 continue;
1166                         }
1167                         switch (to->sa_family) {
1168 #ifdef INET
1169                         case AF_INET:
1170                                 {
1171                                         struct sockaddr_in *sin, *rsin;
1172
1173                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1174                                         rsin = (struct sockaddr_in *)to;
1175                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1176                                                 SCTP_IPI_ADDR_RUNLOCK();
1177                                                 return (1);
1178                                         }
1179                                         break;
1180                                 }
1181 #endif
1182 #ifdef INET6
1183                         case AF_INET6:
1184                                 {
1185                                         struct sockaddr_in6 *sin6, *rsin6;
1186
1187                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1188                                         rsin6 = (struct sockaddr_in6 *)to;
1189                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1190                                                 SCTP_IPI_ADDR_RUNLOCK();
1191                                                 return (1);
1192                                         }
1193                                         break;
1194                                 }
1195
1196 #endif
1197                         default:
1198                                 /* TSNH */
1199                                 break;
1200                         }
1201
1202                 }
1203         }
1204         SCTP_IPI_ADDR_RUNLOCK();
1205         return (0);
1206 }
1207
1208 /*
1209  * rules for use
1210  *
1211  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1212  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1213  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1214  * NULL.
1215  */
1216
1217 struct sctp_tcb *
1218 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1219     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1220 {
1221         struct sctpasochead *head;
1222         struct sctp_inpcb *inp;
1223         struct sctp_tcb *stcb = NULL;
1224         struct sctp_nets *net;
1225         uint16_t rport;
1226
1227         inp = *inp_p;
1228         if (remote->sa_family == AF_INET) {
1229                 rport = (((struct sockaddr_in *)remote)->sin_port);
1230         } else if (remote->sa_family == AF_INET6) {
1231                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1232         } else {
1233                 return (NULL);
1234         }
1235         if (locked_tcb) {
1236                 /*
1237                  * UN-lock so we can do proper locking here this occurs when
1238                  * called from load_addresses_from_init.
1239                  */
1240                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1241                 SCTP_TCB_UNLOCK(locked_tcb);
1242         }
1243         SCTP_INP_INFO_RLOCK();
1244         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1245                 /*-
1246                  * Now either this guy is our listener or it's the
1247                  * connector. If it is the one that issued the connect, then
1248                  * it's only chance is to be the first TCB in the list. If
1249                  * it is the acceptor, then do the special_lookup to hash
1250                  * and find the real inp.
1251                  */
1252                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1253                         /* to is peer addr, from is my addr */
1254                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1255                             netp, inp->def_vrf_id);
1256                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1257                                 /* we have a locked tcb, lower refcount */
1258                                 SCTP_INP_DECR_REF(inp);
1259                         }
1260                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1261                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1262                                 SCTP_TCB_LOCK(locked_tcb);
1263                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1264                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1265                         }
1266                         SCTP_INP_INFO_RUNLOCK();
1267                         return (stcb);
1268                 } else {
1269                         SCTP_INP_WLOCK(inp);
1270                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1271                                 goto null_return;
1272                         }
1273                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1274                         if (stcb == NULL) {
1275                                 goto null_return;
1276                         }
1277                         SCTP_TCB_LOCK(stcb);
1278
1279                         if (stcb->rport != rport) {
1280                                 /* remote port does not match. */
1281                                 SCTP_TCB_UNLOCK(stcb);
1282                                 goto null_return;
1283                         }
1284                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1285                                 SCTP_TCB_UNLOCK(stcb);
1286                                 goto null_return;
1287                         }
1288                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1289                                 SCTP_TCB_UNLOCK(stcb);
1290                                 goto null_return;
1291                         }
1292                         /* now look at the list of remote addresses */
1293                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1294 #ifdef INVARIANTS
1295                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1296                                         panic("Corrupt net list");
1297                                 }
1298 #endif
1299                                 if (net->ro._l_addr.sa.sa_family !=
1300                                     remote->sa_family) {
1301                                         /* not the same family */
1302                                         continue;
1303                                 }
1304                                 switch (remote->sa_family) {
1305 #ifdef INET
1306                                 case AF_INET:
1307                                         {
1308                                                 struct sockaddr_in *sin,
1309                                                            *rsin;
1310
1311                                                 sin = (struct sockaddr_in *)
1312                                                     &net->ro._l_addr;
1313                                                 rsin = (struct sockaddr_in *)remote;
1314                                                 if (sin->sin_addr.s_addr ==
1315                                                     rsin->sin_addr.s_addr) {
1316                                                         /* found it */
1317                                                         if (netp != NULL) {
1318                                                                 *netp = net;
1319                                                         }
1320                                                         if (locked_tcb == NULL) {
1321                                                                 SCTP_INP_DECR_REF(inp);
1322                                                         } else if (locked_tcb != stcb) {
1323                                                                 SCTP_TCB_LOCK(locked_tcb);
1324                                                         }
1325                                                         if (locked_tcb) {
1326                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1327                                                         }
1328                                                         SCTP_INP_WUNLOCK(inp);
1329                                                         SCTP_INP_INFO_RUNLOCK();
1330                                                         return (stcb);
1331                                                 }
1332                                                 break;
1333                                         }
1334 #endif
1335 #ifdef INET6
1336                                 case AF_INET6:
1337                                         {
1338                                                 struct sockaddr_in6 *sin6,
1339                                                             *rsin6;
1340
1341                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1342                                                 rsin6 = (struct sockaddr_in6 *)remote;
1343                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1344                                                     rsin6)) {
1345                                                         /* found it */
1346                                                         if (netp != NULL) {
1347                                                                 *netp = net;
1348                                                         }
1349                                                         if (locked_tcb == NULL) {
1350                                                                 SCTP_INP_DECR_REF(inp);
1351                                                         } else if (locked_tcb != stcb) {
1352                                                                 SCTP_TCB_LOCK(locked_tcb);
1353                                                         }
1354                                                         if (locked_tcb) {
1355                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1356                                                         }
1357                                                         SCTP_INP_WUNLOCK(inp);
1358                                                         SCTP_INP_INFO_RUNLOCK();
1359                                                         return (stcb);
1360                                                 }
1361                                                 break;
1362                                         }
1363 #endif
1364                                 default:
1365                                         /* TSNH */
1366                                         break;
1367                                 }
1368                         }
1369                         SCTP_TCB_UNLOCK(stcb);
1370                 }
1371         } else {
1372                 SCTP_INP_WLOCK(inp);
1373                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1374                         goto null_return;
1375                 }
1376                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1377                     inp->sctp_hashmark)];
1378                 if (head == NULL) {
1379                         goto null_return;
1380                 }
1381                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1382                         if (stcb->rport != rport) {
1383                                 /* remote port does not match */
1384                                 continue;
1385                         }
1386                         SCTP_TCB_LOCK(stcb);
1387                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1388                                 SCTP_TCB_UNLOCK(stcb);
1389                                 continue;
1390                         }
1391                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1392                                 SCTP_TCB_UNLOCK(stcb);
1393                                 continue;
1394                         }
1395                         /* now look at the list of remote addresses */
1396                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1397 #ifdef INVARIANTS
1398                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1399                                         panic("Corrupt net list");
1400                                 }
1401 #endif
1402                                 if (net->ro._l_addr.sa.sa_family !=
1403                                     remote->sa_family) {
1404                                         /* not the same family */
1405                                         continue;
1406                                 }
1407                                 switch (remote->sa_family) {
1408 #ifdef INET
1409                                 case AF_INET:
1410                                         {
1411                                                 struct sockaddr_in *sin,
1412                                                            *rsin;
1413
1414                                                 sin = (struct sockaddr_in *)
1415                                                     &net->ro._l_addr;
1416                                                 rsin = (struct sockaddr_in *)remote;
1417                                                 if (sin->sin_addr.s_addr ==
1418                                                     rsin->sin_addr.s_addr) {
1419                                                         /* found it */
1420                                                         if (netp != NULL) {
1421                                                                 *netp = net;
1422                                                         }
1423                                                         if (locked_tcb == NULL) {
1424                                                                 SCTP_INP_DECR_REF(inp);
1425                                                         } else if (locked_tcb != stcb) {
1426                                                                 SCTP_TCB_LOCK(locked_tcb);
1427                                                         }
1428                                                         if (locked_tcb) {
1429                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1430                                                         }
1431                                                         SCTP_INP_WUNLOCK(inp);
1432                                                         SCTP_INP_INFO_RUNLOCK();
1433                                                         return (stcb);
1434                                                 }
1435                                                 break;
1436                                         }
1437 #endif
1438 #ifdef INET6
1439                                 case AF_INET6:
1440                                         {
1441                                                 struct sockaddr_in6 *sin6,
1442                                                             *rsin6;
1443
1444                                                 sin6 = (struct sockaddr_in6 *)
1445                                                     &net->ro._l_addr;
1446                                                 rsin6 = (struct sockaddr_in6 *)remote;
1447                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1448                                                     rsin6)) {
1449                                                         /* found it */
1450                                                         if (netp != NULL) {
1451                                                                 *netp = net;
1452                                                         }
1453                                                         if (locked_tcb == NULL) {
1454                                                                 SCTP_INP_DECR_REF(inp);
1455                                                         } else if (locked_tcb != stcb) {
1456                                                                 SCTP_TCB_LOCK(locked_tcb);
1457                                                         }
1458                                                         if (locked_tcb) {
1459                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1460                                                         }
1461                                                         SCTP_INP_WUNLOCK(inp);
1462                                                         SCTP_INP_INFO_RUNLOCK();
1463                                                         return (stcb);
1464                                                 }
1465                                                 break;
1466                                         }
1467 #endif
1468                                 default:
1469                                         /* TSNH */
1470                                         break;
1471                                 }
1472                         }
1473                         SCTP_TCB_UNLOCK(stcb);
1474                 }
1475         }
1476 null_return:
1477         /* clean up for returning null */
1478         if (locked_tcb) {
1479                 SCTP_TCB_LOCK(locked_tcb);
1480                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1481         }
1482         SCTP_INP_WUNLOCK(inp);
1483         SCTP_INP_INFO_RUNLOCK();
1484         /* not found */
1485         return (NULL);
1486 }
1487
1488 /*
1489  * Find an association for a specific endpoint using the association id given
1490  * out in the COMM_UP notification
1491  */
1492
1493 struct sctp_tcb *
1494 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1495 {
1496         /*
1497          * Use my the assoc_id to find a endpoint
1498          */
1499         struct sctpasochead *head;
1500         struct sctp_tcb *stcb;
1501         uint32_t id;
1502
1503         if (inp == NULL) {
1504                 SCTP_PRINTF("TSNH ep_associd\n");
1505                 return (NULL);
1506         }
1507         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1508                 SCTP_PRINTF("TSNH ep_associd0\n");
1509                 return (NULL);
1510         }
1511         id = (uint32_t) asoc_id;
1512         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1513         if (head == NULL) {
1514                 /* invalid id TSNH */
1515                 SCTP_PRINTF("TSNH ep_associd1\n");
1516                 return (NULL);
1517         }
1518         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1519                 if (stcb->asoc.assoc_id == id) {
1520                         if (inp != stcb->sctp_ep) {
1521                                 /*
1522                                  * some other guy has the same id active (id
1523                                  * collision ??).
1524                                  */
1525                                 SCTP_PRINTF("TSNH ep_associd2\n");
1526                                 continue;
1527                         }
1528                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1529                                 continue;
1530                         }
1531                         if (want_lock) {
1532                                 SCTP_TCB_LOCK(stcb);
1533                         }
1534                         return (stcb);
1535                 }
1536         }
1537         return (NULL);
1538 }
1539
1540
1541 struct sctp_tcb *
1542 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1543 {
1544         struct sctp_tcb *stcb;
1545
1546         SCTP_INP_RLOCK(inp);
1547         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1548         SCTP_INP_RUNLOCK(inp);
1549         return (stcb);
1550 }
1551
1552
1553 static struct sctp_inpcb *
1554 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1555     uint16_t lport, uint32_t vrf_id)
1556 {
1557         struct sctp_inpcb *inp;
1558         struct sctp_laddr *laddr;
1559
1560 #ifdef INET
1561         struct sockaddr_in *sin;
1562
1563 #endif
1564 #ifdef INET6
1565         struct sockaddr_in6 *sin6;
1566         struct sockaddr_in6 *intf_addr6;
1567
1568 #endif
1569
1570         int fnd;
1571
1572         /*
1573          * Endpoint probe expects that the INP_INFO is locked.
1574          */
1575 #ifdef INET
1576         sin = NULL;
1577 #endif
1578 #ifdef INET6
1579         sin6 = NULL;
1580 #endif
1581         switch (nam->sa_family) {
1582 #ifdef INET
1583         case AF_INET:
1584                 sin = (struct sockaddr_in *)nam;
1585                 break;
1586 #endif
1587 #ifdef INET6
1588         case AF_INET6:
1589                 sin6 = (struct sockaddr_in6 *)nam;
1590                 break;
1591 #endif
1592         default:
1593                 /* unsupported family */
1594                 return (NULL);
1595         }
1596
1597         if (head == NULL)
1598                 return (NULL);
1599
1600         LIST_FOREACH(inp, head, sctp_hash) {
1601                 SCTP_INP_RLOCK(inp);
1602                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1603                         SCTP_INP_RUNLOCK(inp);
1604                         continue;
1605                 }
1606                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1607                     (inp->sctp_lport == lport)) {
1608                         /* got it */
1609 #ifdef INET
1610                         if ((nam->sa_family == AF_INET) &&
1611                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1612                             SCTP_IPV6_V6ONLY(inp)) {
1613                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1614                                 SCTP_INP_RUNLOCK(inp);
1615                                 continue;
1616                         }
1617 #endif
1618 #ifdef INET6
1619                         /* A V6 address and the endpoint is NOT bound V6 */
1620                         if (nam->sa_family == AF_INET6 &&
1621                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1622                                 SCTP_INP_RUNLOCK(inp);
1623                                 continue;
1624                         }
1625 #endif
1626                         /* does a VRF id match? */
1627                         fnd = 0;
1628                         if (inp->def_vrf_id == vrf_id)
1629                                 fnd = 1;
1630
1631                         SCTP_INP_RUNLOCK(inp);
1632                         if (!fnd)
1633                                 continue;
1634                         return (inp);
1635                 }
1636                 SCTP_INP_RUNLOCK(inp);
1637         }
1638         switch (nam->sa_family) {
1639 #ifdef INET
1640         case AF_INET:
1641                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1642                         /* Can't hunt for one that has no address specified */
1643                         return (NULL);
1644                 }
1645                 break;
1646 #endif
1647 #ifdef INET6
1648         case AF_INET6:
1649                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1650                         /* Can't hunt for one that has no address specified */
1651                         return (NULL);
1652                 }
1653                 break;
1654 #endif
1655         default:
1656                 break;
1657         }
1658         /*
1659          * ok, not bound to all so see if we can find a EP bound to this
1660          * address.
1661          */
1662         LIST_FOREACH(inp, head, sctp_hash) {
1663                 SCTP_INP_RLOCK(inp);
1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665                         SCTP_INP_RUNLOCK(inp);
1666                         continue;
1667                 }
1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1669                         SCTP_INP_RUNLOCK(inp);
1670                         continue;
1671                 }
1672                 /*
1673                  * Ok this could be a likely candidate, look at all of its
1674                  * addresses
1675                  */
1676                 if (inp->sctp_lport != lport) {
1677                         SCTP_INP_RUNLOCK(inp);
1678                         continue;
1679                 }
1680                 /* does a VRF id match? */
1681                 fnd = 0;
1682                 if (inp->def_vrf_id == vrf_id)
1683                         fnd = 1;
1684
1685                 if (!fnd) {
1686                         SCTP_INP_RUNLOCK(inp);
1687                         continue;
1688                 }
1689                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1690                         if (laddr->ifa == NULL) {
1691                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1692                                     __FUNCTION__);
1693                                 continue;
1694                         }
1695                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1696                             laddr->ifa);
1697                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1698                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1699                                 continue;
1700                         }
1701                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1702                                 /* possible, see if it matches */
1703                                 switch (nam->sa_family) {
1704 #ifdef INET
1705                                 case AF_INET:
1706                                         if (sin->sin_addr.s_addr ==
1707                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1708                                                 SCTP_INP_RUNLOCK(inp);
1709                                                 return (inp);
1710                                         }
1711                                         break;
1712 #endif
1713 #ifdef INET6
1714                                 case AF_INET6:
1715                                         intf_addr6 = &laddr->ifa->address.sin6;
1716                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1717                                             intf_addr6)) {
1718                                                 SCTP_INP_RUNLOCK(inp);
1719                                                 return (inp);
1720                                         }
1721                                         break;
1722 #endif
1723                                 }
1724                         }
1725                 }
1726                 SCTP_INP_RUNLOCK(inp);
1727         }
1728         return (NULL);
1729 }
1730
1731
1732 static struct sctp_inpcb *
1733 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1734 {
1735         struct sctppcbhead *head;
1736         struct sctp_inpcb *t_inp;
1737         int fnd;
1738
1739         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1740             SCTP_BASE_INFO(hashmark))];
1741         LIST_FOREACH(t_inp, head, sctp_hash) {
1742                 if (t_inp->sctp_lport != lport) {
1743                         continue;
1744                 }
1745                 /* is it in the VRF in question */
1746                 fnd = 0;
1747                 if (t_inp->def_vrf_id == vrf_id)
1748                         fnd = 1;
1749                 if (!fnd)
1750                         continue;
1751
1752                 /* This one is in use. */
1753                 /* check the v6/v4 binding issue */
1754                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1755                     SCTP_IPV6_V6ONLY(t_inp)) {
1756                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1757                                 /* collision in V6 space */
1758                                 return (t_inp);
1759                         } else {
1760                                 /* inp is BOUND_V4 no conflict */
1761                                 continue;
1762                         }
1763                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1764                         /* t_inp is bound v4 and v6, conflict always */
1765                         return (t_inp);
1766                 } else {
1767                         /* t_inp is bound only V4 */
1768                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1769                             SCTP_IPV6_V6ONLY(inp)) {
1770                                 /* no conflict */
1771                                 continue;
1772                         }
1773                         /* else fall through to conflict */
1774                 }
1775                 return (t_inp);
1776         }
1777         return (NULL);
1778 }
1779
1780
1781 int
1782 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1783 {
1784         /* For 1-2-1 with port reuse */
1785         struct sctppcbhead *head;
1786         struct sctp_inpcb *tinp;
1787
1788         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1789                 /* only works with port reuse on */
1790                 return (-1);
1791         }
1792         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1793                 return (0);
1794         }
1795         SCTP_INP_RUNLOCK(inp);
1796         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1797             SCTP_BASE_INFO(hashmark))];
1798         /* Kick out all non-listeners to the TCP hash */
1799         LIST_FOREACH(tinp, head, sctp_hash) {
1800                 if (tinp->sctp_lport != inp->sctp_lport) {
1801                         continue;
1802                 }
1803                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1804                         continue;
1805                 }
1806                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1807                         continue;
1808                 }
1809                 if (tinp->sctp_socket->so_qlimit) {
1810                         continue;
1811                 }
1812                 SCTP_INP_WLOCK(tinp);
1813                 LIST_REMOVE(tinp, sctp_hash);
1814                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1815                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1816                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1817                 SCTP_INP_WUNLOCK(tinp);
1818         }
1819         SCTP_INP_WLOCK(inp);
1820         /* Pull from where he was */
1821         LIST_REMOVE(inp, sctp_hash);
1822         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1824         LIST_INSERT_HEAD(head, inp, sctp_hash);
1825         SCTP_INP_WUNLOCK(inp);
1826         SCTP_INP_RLOCK(inp);
1827         return (0);
1828 }
1829
1830
1831 struct sctp_inpcb *
1832 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1833     uint32_t vrf_id)
1834 {
1835         /*
1836          * First we check the hash table to see if someone has this port
1837          * bound with just the port.
1838          */
1839         struct sctp_inpcb *inp;
1840         struct sctppcbhead *head;
1841         int lport;
1842         unsigned int i;
1843
1844 #ifdef INET
1845         struct sockaddr_in *sin;
1846
1847 #endif
1848 #ifdef INET6
1849         struct sockaddr_in6 *sin6;
1850
1851 #endif
1852
1853         switch (nam->sa_family) {
1854 #ifdef INET
1855         case AF_INET:
1856                 sin = (struct sockaddr_in *)nam;
1857                 lport = sin->sin_port;
1858                 break;
1859 #endif
1860 #ifdef INET6
1861         case AF_INET6:
1862                 sin6 = (struct sockaddr_in6 *)nam;
1863                 lport = sin6->sin6_port;
1864                 break;
1865 #endif
1866         default:
1867                 return (NULL);
1868         }
1869         /*
1870          * I could cheat here and just cast to one of the types but we will
1871          * do it right. It also provides the check against an Unsupported
1872          * type too.
1873          */
1874         /* Find the head of the ALLADDR chain */
1875         if (have_lock == 0) {
1876                 SCTP_INP_INFO_RLOCK();
1877         }
1878         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1879             SCTP_BASE_INFO(hashmark))];
1880         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1881
1882         /*
1883          * If the TCP model exists it could be that the main listening
1884          * endpoint is gone but there still exists a connected socket for
1885          * this guy. If so we can return the first one that we find. This
1886          * may NOT be the correct one so the caller should be wary on the
1887          * returned INP. Currently the only caller that sets find_tcp_pool
1888          * is in bindx where we are verifying that a user CAN bind the
1889          * address. He either has bound it already, or someone else has, or
1890          * its open to bind, so this is good enough.
1891          */
1892         if (inp == NULL && find_tcp_pool) {
1893                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1894                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1895                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1896                         if (inp) {
1897                                 break;
1898                         }
1899                 }
1900         }
1901         if (inp) {
1902                 SCTP_INP_INCR_REF(inp);
1903         }
1904         if (have_lock == 0) {
1905                 SCTP_INP_INFO_RUNLOCK();
1906         }
1907         return (inp);
1908 }
1909
1910 /*
1911  * Find an association for an endpoint with the pointer to whom you want to
1912  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1913  * need to change the *to to some other struct like a mbuf...
1914  */
1915 struct sctp_tcb *
1916 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1917     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1918     uint32_t vrf_id)
1919 {
1920         struct sctp_inpcb *inp = NULL;
1921         struct sctp_tcb *retval;
1922
1923         SCTP_INP_INFO_RLOCK();
1924         if (find_tcp_pool) {
1925                 if (inp_p != NULL) {
1926                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1927                             vrf_id);
1928                 } else {
1929                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1930                             vrf_id);
1931                 }
1932                 if (retval != NULL) {
1933                         SCTP_INP_INFO_RUNLOCK();
1934                         return (retval);
1935                 }
1936         }
1937         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1938         if (inp_p != NULL) {
1939                 *inp_p = inp;
1940         }
1941         SCTP_INP_INFO_RUNLOCK();
1942
1943         if (inp == NULL) {
1944                 return (NULL);
1945         }
1946         /*
1947          * ok, we have an endpoint, now lets find the assoc for it (if any)
1948          * we now place the source address or from in the to of the find
1949          * endpoint call. Since in reality this chain is used from the
1950          * inbound packet side.
1951          */
1952         if (inp_p != NULL) {
1953                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1954                     NULL);
1955         } else {
1956                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1957                     NULL);
1958         }
1959         return retval;
1960 }
1961
1962
1963 /*
1964  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1965  * find all addresses that the sender has specified in any address list. Each
1966  * address will be used to lookup the TCB and see if one exits.
1967  */
1968 static struct sctp_tcb *
1969 sctp_findassociation_special_addr(struct mbuf *m, int offset,
1970     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1971     struct sockaddr *dest)
1972 {
1973         struct sctp_paramhdr *phdr, parm_buf;
1974         struct sctp_tcb *retval;
1975         uint32_t ptype, plen;
1976
1977 #ifdef INET
1978         struct sockaddr_in sin4;
1979
1980 #endif
1981 #ifdef INET6
1982         struct sockaddr_in6 sin6;
1983
1984 #endif
1985
1986 #ifdef INET
1987         memset(&sin4, 0, sizeof(sin4));
1988         sin4.sin_len = sizeof(sin4);
1989         sin4.sin_family = AF_INET;
1990         sin4.sin_port = sh->src_port;
1991 #endif
1992 #ifdef INET6
1993         memset(&sin6, 0, sizeof(sin6));
1994         sin6.sin6_len = sizeof(sin6);
1995         sin6.sin6_family = AF_INET6;
1996         sin6.sin6_port = sh->src_port;
1997 #endif
1998
1999         retval = NULL;
2000         offset += sizeof(struct sctp_init_chunk);
2001
2002         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2003         while (phdr != NULL) {
2004                 /* now we must see if we want the parameter */
2005                 ptype = ntohs(phdr->param_type);
2006                 plen = ntohs(phdr->param_length);
2007                 if (plen == 0) {
2008                         break;
2009                 }
2010 #ifdef INET
2011                 if (ptype == SCTP_IPV4_ADDRESS &&
2012                     plen == sizeof(struct sctp_ipv4addr_param)) {
2013                         /* Get the rest of the address */
2014                         struct sctp_ipv4addr_param ip4_parm, *p4;
2015
2016                         phdr = sctp_get_next_param(m, offset,
2017                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2018                         if (phdr == NULL) {
2019                                 return (NULL);
2020                         }
2021                         p4 = (struct sctp_ipv4addr_param *)phdr;
2022                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2023                         /* look it up */
2024                         retval = sctp_findassociation_ep_addr(inp_p,
2025                             (struct sockaddr *)&sin4, netp, dest, NULL);
2026                         if (retval != NULL) {
2027                                 return (retval);
2028                         }
2029                 }
2030 #endif
2031 #ifdef INET6
2032                 if (ptype == SCTP_IPV6_ADDRESS &&
2033                     plen == sizeof(struct sctp_ipv6addr_param)) {
2034                         /* Get the rest of the address */
2035                         struct sctp_ipv6addr_param ip6_parm, *p6;
2036
2037                         phdr = sctp_get_next_param(m, offset,
2038                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2039                         if (phdr == NULL) {
2040                                 return (NULL);
2041                         }
2042                         p6 = (struct sctp_ipv6addr_param *)phdr;
2043                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2044                         /* look it up */
2045                         retval = sctp_findassociation_ep_addr(inp_p,
2046                             (struct sockaddr *)&sin6, netp, dest, NULL);
2047                         if (retval != NULL) {
2048                                 return (retval);
2049                         }
2050                 }
2051 #endif
2052                 offset += SCTP_SIZE32(plen);
2053                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2054                     sizeof(parm_buf));
2055         }
2056         return (NULL);
2057 }
2058
2059 static struct sctp_tcb *
2060 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2061     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2062     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2063 {
2064         /*
2065          * Use my vtag to hash. If we find it we then verify the source addr
2066          * is in the assoc. If all goes well we save a bit on rec of a
2067          * packet.
2068          */
2069         struct sctpasochead *head;
2070         struct sctp_nets *net;
2071         struct sctp_tcb *stcb;
2072
2073         *netp = NULL;
2074         *inp_p = NULL;
2075         SCTP_INP_INFO_RLOCK();
2076         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2077             SCTP_BASE_INFO(hashasocmark))];
2078         if (head == NULL) {
2079                 /* invalid vtag */
2080                 SCTP_INP_INFO_RUNLOCK();
2081                 return (NULL);
2082         }
2083         LIST_FOREACH(stcb, head, sctp_asocs) {
2084                 SCTP_INP_RLOCK(stcb->sctp_ep);
2085                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2086                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2087                         continue;
2088                 }
2089                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2090                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2091                         continue;
2092                 }
2093                 SCTP_TCB_LOCK(stcb);
2094                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2095                 if (stcb->asoc.my_vtag == vtag) {
2096                         /* candidate */
2097                         if (stcb->rport != rport) {
2098                                 SCTP_TCB_UNLOCK(stcb);
2099                                 continue;
2100                         }
2101                         if (stcb->sctp_ep->sctp_lport != lport) {
2102                                 SCTP_TCB_UNLOCK(stcb);
2103                                 continue;
2104                         }
2105                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2106                                 SCTP_TCB_UNLOCK(stcb);
2107                                 continue;
2108                         }
2109                         /* RRS:Need toaddr check here */
2110                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2111                                 /* Endpoint does not own this address */
2112                                 SCTP_TCB_UNLOCK(stcb);
2113                                 continue;
2114                         }
2115                         if (remote_tag) {
2116                                 /*
2117                                  * If we have both vtags that's all we match
2118                                  * on
2119                                  */
2120                                 if (stcb->asoc.peer_vtag == remote_tag) {
2121                                         /*
2122                                          * If both tags match we consider it
2123                                          * conclusive and check NO
2124                                          * source/destination addresses
2125                                          */
2126                                         goto conclusive;
2127                                 }
2128                         }
2129                         if (skip_src_check) {
2130                 conclusive:
2131                                 if (from) {
2132                                         *netp = sctp_findnet(stcb, from);
2133                                 } else {
2134                                         *netp = NULL;   /* unknown */
2135                                 }
2136                                 if (inp_p)
2137                                         *inp_p = stcb->sctp_ep;
2138                                 SCTP_INP_INFO_RUNLOCK();
2139                                 return (stcb);
2140                         }
2141                         net = sctp_findnet(stcb, from);
2142                         if (net) {
2143                                 /* yep its him. */
2144                                 *netp = net;
2145                                 SCTP_STAT_INCR(sctps_vtagexpress);
2146                                 *inp_p = stcb->sctp_ep;
2147                                 SCTP_INP_INFO_RUNLOCK();
2148                                 return (stcb);
2149                         } else {
2150                                 /*
2151                                  * not him, this should only happen in rare
2152                                  * cases so I peg it.
2153                                  */
2154                                 SCTP_STAT_INCR(sctps_vtagbogus);
2155                         }
2156                 }
2157                 SCTP_TCB_UNLOCK(stcb);
2158         }
2159         SCTP_INP_INFO_RUNLOCK();
2160         return (NULL);
2161 }
2162
2163 /*
2164  * Find an association with the pointer to the inbound IP packet. This can be
2165  * a IPv4 or IPv6 packet.
2166  */
2167 struct sctp_tcb *
2168 sctp_findassociation_addr(struct mbuf *m, int offset,
2169     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2170     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2171 {
2172         int find_tcp_pool;
2173         struct ip *iph;
2174         struct sctp_tcb *retval;
2175         struct sockaddr_storage to_store, from_store;
2176         struct sockaddr *to = (struct sockaddr *)&to_store;
2177         struct sockaddr *from = (struct sockaddr *)&from_store;
2178         struct sctp_inpcb *inp;
2179
2180         iph = mtod(m, struct ip *);
2181         switch (iph->ip_v) {
2182 #ifdef INET
2183         case IPVERSION:
2184                 {
2185                         /* its IPv4 */
2186                         struct sockaddr_in *from4;
2187
2188                         from4 = (struct sockaddr_in *)&from_store;
2189                         bzero(from4, sizeof(*from4));
2190                         from4->sin_family = AF_INET;
2191                         from4->sin_len = sizeof(struct sockaddr_in);
2192                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2193                         from4->sin_port = sh->src_port;
2194                         break;
2195                 }
2196 #endif
2197 #ifdef INET6
2198         case IPV6_VERSION >> 4:
2199                 {
2200                         /* its IPv6 */
2201                         struct ip6_hdr *ip6;
2202                         struct sockaddr_in6 *from6;
2203
2204                         ip6 = mtod(m, struct ip6_hdr *);
2205                         from6 = (struct sockaddr_in6 *)&from_store;
2206                         bzero(from6, sizeof(*from6));
2207                         from6->sin6_family = AF_INET6;
2208                         from6->sin6_len = sizeof(struct sockaddr_in6);
2209                         from6->sin6_addr = ip6->ip6_src;
2210                         from6->sin6_port = sh->src_port;
2211                         /* Get the scopes in properly to the sin6 addr's */
2212                         /* we probably don't need these operations */
2213                         (void)sa6_recoverscope(from6);
2214                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2215                         break;
2216                 }
2217 #endif
2218         default:
2219                 /* Currently not supported. */
2220                 return (NULL);
2221         }
2222
2223
2224         switch (iph->ip_v) {
2225 #ifdef INET
2226         case IPVERSION:
2227                 {
2228                         /* its IPv4 */
2229                         struct sockaddr_in *to4;
2230
2231                         to4 = (struct sockaddr_in *)&to_store;
2232                         bzero(to4, sizeof(*to4));
2233                         to4->sin_family = AF_INET;
2234                         to4->sin_len = sizeof(struct sockaddr_in);
2235                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2236                         to4->sin_port = sh->dest_port;
2237                         break;
2238                 }
2239 #endif
2240 #ifdef INET6
2241         case IPV6_VERSION >> 4:
2242                 {
2243                         /* its IPv6 */
2244                         struct ip6_hdr *ip6;
2245                         struct sockaddr_in6 *to6;
2246
2247                         ip6 = mtod(m, struct ip6_hdr *);
2248                         to6 = (struct sockaddr_in6 *)&to_store;
2249                         bzero(to6, sizeof(*to6));
2250                         to6->sin6_family = AF_INET6;
2251                         to6->sin6_len = sizeof(struct sockaddr_in6);
2252                         to6->sin6_addr = ip6->ip6_dst;
2253                         to6->sin6_port = sh->dest_port;
2254                         /* Get the scopes in properly to the sin6 addr's */
2255                         /* we probably don't need these operations */
2256                         (void)sa6_recoverscope(to6);
2257                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2258                         break;
2259                 }
2260 #endif
2261         default:
2262                 /* TSNH */
2263                 break;
2264         }
2265         if (sh->v_tag) {
2266                 /* we only go down this path if vtag is non-zero */
2267                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2268                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2269                 if (retval) {
2270                         return (retval);
2271                 }
2272         }
2273         find_tcp_pool = 0;
2274         if ((ch->chunk_type != SCTP_INITIATION) &&
2275             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2276             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2277             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2278                 /* Other chunk types go to the tcp pool. */
2279                 find_tcp_pool = 1;
2280         }
2281         if (inp_p) {
2282                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2283                     find_tcp_pool, vrf_id);
2284                 inp = *inp_p;
2285         } else {
2286                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2287                     find_tcp_pool, vrf_id);
2288         }
2289         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2290         if (retval == NULL && inp) {
2291                 /* Found a EP but not this address */
2292                 if ((ch->chunk_type == SCTP_INITIATION) ||
2293                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2294                         /*-
2295                          * special hook, we do NOT return linp or an
2296                          * association that is linked to an existing
2297                          * association that is under the TCP pool (i.e. no
2298                          * listener exists). The endpoint finding routine
2299                          * will always find a listener before examining the
2300                          * TCP pool.
2301                          */
2302                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2303                                 if (inp_p) {
2304                                         *inp_p = NULL;
2305                                 }
2306                                 return (NULL);
2307                         }
2308                         retval = sctp_findassociation_special_addr(m,
2309                             offset, sh, &inp, netp, to);
2310                         if (inp_p != NULL) {
2311                                 *inp_p = inp;
2312                         }
2313                 }
2314         }
2315         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2316         return (retval);
2317 }
2318
2319 /*
2320  * lookup an association by an ASCONF lookup address.
2321  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2322  */
2323 struct sctp_tcb *
2324 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2325     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2326 {
2327         struct sctp_tcb *stcb;
2328         struct sockaddr_storage local_store, remote_store;
2329         struct sockaddr *to;
2330         struct ip *iph;
2331         struct sctp_paramhdr parm_buf, *phdr;
2332         int ptype;
2333         int zero_address = 0;
2334
2335 #ifdef INET
2336         struct sockaddr_in *sin;
2337
2338 #endif
2339 #ifdef INET6
2340         struct ip6_hdr *ip6;
2341         struct sockaddr_in6 *sin6;
2342
2343 #endif
2344
2345         memset(&local_store, 0, sizeof(local_store));
2346         memset(&remote_store, 0, sizeof(remote_store));
2347         to = (struct sockaddr *)&local_store;
2348         /* First get the destination address setup too. */
2349         iph = mtod(m, struct ip *);
2350         switch (iph->ip_v) {
2351 #ifdef INET
2352         case IPVERSION:
2353                 /* its IPv4 */
2354                 sin = (struct sockaddr_in *)&local_store;
2355                 sin->sin_family = AF_INET;
2356                 sin->sin_len = sizeof(*sin);
2357                 sin->sin_port = sh->dest_port;
2358                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2359                 break;
2360 #endif
2361 #ifdef INET6
2362         case IPV6_VERSION >> 4:
2363                 /* its IPv6 */
2364                 ip6 = mtod(m, struct ip6_hdr *);
2365                 sin6 = (struct sockaddr_in6 *)&local_store;
2366                 sin6->sin6_family = AF_INET6;
2367                 sin6->sin6_len = sizeof(*sin6);
2368                 sin6->sin6_port = sh->dest_port;
2369                 sin6->sin6_addr = ip6->ip6_dst;
2370                 break;
2371 #endif
2372         default:
2373                 return NULL;
2374         }
2375
2376         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2377             &parm_buf, sizeof(struct sctp_paramhdr));
2378         if (phdr == NULL) {
2379                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2380                     __FUNCTION__);
2381                 return NULL;
2382         }
2383         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2384         /* get the correlation address */
2385         switch (ptype) {
2386 #ifdef INET6
2387         case SCTP_IPV6_ADDRESS:
2388                 {
2389                         /* ipv6 address param */
2390                         struct sctp_ipv6addr_param *p6, p6_buf;
2391
2392                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2393                                 return NULL;
2394                         }
2395                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2396                             offset + sizeof(struct sctp_asconf_chunk),
2397                             &p6_buf.ph, sizeof(*p6));
2398                         if (p6 == NULL) {
2399                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2400                                     __FUNCTION__);
2401                                 return (NULL);
2402                         }
2403                         sin6 = (struct sockaddr_in6 *)&remote_store;
2404                         sin6->sin6_family = AF_INET6;
2405                         sin6->sin6_len = sizeof(*sin6);
2406                         sin6->sin6_port = sh->src_port;
2407                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2408                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2409                                 zero_address = 1;
2410                         break;
2411                 }
2412 #endif
2413 #ifdef INET
2414         case SCTP_IPV4_ADDRESS:
2415                 {
2416                         /* ipv4 address param */
2417                         struct sctp_ipv4addr_param *p4, p4_buf;
2418
2419                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2420                                 return NULL;
2421                         }
2422                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2423                             offset + sizeof(struct sctp_asconf_chunk),
2424                             &p4_buf.ph, sizeof(*p4));
2425                         if (p4 == NULL) {
2426                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2427                                     __FUNCTION__);
2428                                 return (NULL);
2429                         }
2430                         sin = (struct sockaddr_in *)&remote_store;
2431                         sin->sin_family = AF_INET;
2432                         sin->sin_len = sizeof(*sin);
2433                         sin->sin_port = sh->src_port;
2434                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2435                         if (sin->sin_addr.s_addr == INADDR_ANY)
2436                                 zero_address = 1;
2437                         break;
2438                 }
2439 #endif
2440         default:
2441                 /* invalid address param type */
2442                 return NULL;
2443         }
2444
2445         if (zero_address) {
2446                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2447                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2448                 /*
2449                  * printf("findassociation_ep_asconf: zero lookup address
2450                  * finds stcb 0x%x\n", (uint32_t)stcb);
2451                  */
2452         } else {
2453                 stcb = sctp_findassociation_ep_addr(inp_p,
2454                     (struct sockaddr *)&remote_store, netp,
2455                     to, NULL);
2456         }
2457         return (stcb);
2458 }
2459
2460
2461 /*
2462  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2463  * addresses. This way if we don't get a bind we by default pick a ephemeral
2464  * port with all addresses bound.
2465  */
2466 int
2467 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2468 {
2469         /*
2470          * we get called when a new endpoint starts up. We need to allocate
2471          * the sctp_inpcb structure from the zone and init it. Mark it as
2472          * unbound and find a port that we can use as an ephemeral with
2473          * INADDR_ANY. If the user binds later no problem we can then add in
2474          * the specific addresses. And setup the default parameters for the
2475          * EP.
2476          */
2477         int i, error;
2478         struct sctp_inpcb *inp;
2479         struct sctp_pcb *m;
2480         struct timeval time;
2481         sctp_sharedkey_t *null_key;
2482
2483         error = 0;
2484
2485         SCTP_INP_INFO_WLOCK();
2486         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2487         if (inp == NULL) {
2488                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2489                 SCTP_INP_INFO_WUNLOCK();
2490                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2491                 return (ENOBUFS);
2492         }
2493         /* zap it */
2494         bzero(inp, sizeof(*inp));
2495
2496         /* bump generations */
2497         /* setup socket pointers */
2498         inp->sctp_socket = so;
2499         inp->ip_inp.inp.inp_socket = so;
2500 #ifdef INET6
2501         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2502                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2503         }
2504 #endif
2505         inp->sctp_associd_counter = 1;
2506         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2507         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2508         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2509         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2510         /* init the small hash table we use to track asocid <-> tcb */
2511         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2512         if (inp->sctp_asocidhash == NULL) {
2513                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2514                 SCTP_INP_INFO_WUNLOCK();
2515                 return (ENOBUFS);
2516         }
2517 #ifdef IPSEC
2518         {
2519                 struct inpcbpolicy *pcb_sp = NULL;
2520
2521                 error = ipsec_init_policy(so, &pcb_sp);
2522                 /* Arrange to share the policy */
2523                 inp->ip_inp.inp.inp_sp = pcb_sp;
2524                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2525         }
2526         if (error != 0) {
2527                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2528                 SCTP_INP_INFO_WUNLOCK();
2529                 return error;
2530         }
2531 #endif                          /* IPSEC */
2532         SCTP_INCR_EP_COUNT();
2533         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2534         SCTP_INP_INFO_WUNLOCK();
2535
2536         so->so_pcb = (caddr_t)inp;
2537
2538         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2539                 /* UDP style socket */
2540                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2541                     SCTP_PCB_FLAGS_UNBOUND);
2542                 /* Be sure it is NON-BLOCKING IO for UDP */
2543                 /* SCTP_SET_SO_NBIO(so); */
2544         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2545                 /* TCP style socket */
2546                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2547                     SCTP_PCB_FLAGS_UNBOUND);
2548                 /* Be sure we have blocking IO by default */
2549                 SCTP_CLEAR_SO_NBIO(so);
2550         } else {
2551                 /*
2552                  * unsupported socket type (RAW, etc)- in case we missed it
2553                  * in protosw
2554                  */
2555                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2556                 so->so_pcb = NULL;
2557                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2558                 return (EOPNOTSUPP);
2559         }
2560         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2561                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2562                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2563         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2564                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2565                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2566         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2567                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2568                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2569         }
2570         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2571             &inp->sctp_hashmark);
2572         if (inp->sctp_tcbhash == NULL) {
2573                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2574                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2575                 so->so_pcb = NULL;
2576                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2577                 return (ENOBUFS);
2578         }
2579         inp->def_vrf_id = vrf_id;
2580
2581         SCTP_INP_INFO_WLOCK();
2582         SCTP_INP_LOCK_INIT(inp);
2583         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2584         SCTP_INP_READ_INIT(inp);
2585         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2586         /* lock the new ep */
2587         SCTP_INP_WLOCK(inp);
2588
2589         /* add it to the info area */
2590         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2591         SCTP_INP_INFO_WUNLOCK();
2592
2593         TAILQ_INIT(&inp->read_queue);
2594         LIST_INIT(&inp->sctp_addr_list);
2595
2596         LIST_INIT(&inp->sctp_asoc_list);
2597
2598 #ifdef SCTP_TRACK_FREED_ASOCS
2599         /* TEMP CODE */
2600         LIST_INIT(&inp->sctp_asoc_free_list);
2601 #endif
2602         /* Init the timer structure for signature change */
2603         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2604         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2605
2606         /* now init the actual endpoint default data */
2607         m = &inp->sctp_ep;
2608
2609         /* setup the base timeout information */
2610         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2611         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2612         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2613         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2614         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2615         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2616         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2617         /* all max/min max are in ms */
2618         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2619         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2620         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2621         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2622         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2623
2624         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2625
2626         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2627         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2628         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2629         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2630         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2631         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2632         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2633         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2634
2635         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2636         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2637         /* number of streams to pre-open on a association */
2638         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2639
2640         /* Add adaptation cookie */
2641         m->adaptation_layer_indicator = 0x504C5253;
2642
2643         /* seed random number generator */
2644         m->random_counter = 1;
2645         m->store_at = SCTP_SIGNATURE_SIZE;
2646         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2647         sctp_fill_random_store(m);
2648
2649         /* Minimum cookie size */
2650         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2651             sizeof(struct sctp_state_cookie);
2652         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2653
2654         /* Setup the initial secret */
2655         (void)SCTP_GETTIME_TIMEVAL(&time);
2656         m->time_of_secret_change = time.tv_sec;
2657
2658         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2659                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2660         }
2661         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2662
2663         /* How long is a cookie good for ? */
2664         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2665         /*
2666          * Initialize authentication parameters
2667          */
2668         m->local_hmacs = sctp_default_supported_hmaclist();
2669         m->local_auth_chunks = sctp_alloc_chunklist();
2670         m->default_dscp = 0;
2671 #ifdef INET6
2672         m->default_flowlabel = 0;
2673 #endif
2674         sctp_auth_set_default_chunks(m->local_auth_chunks);
2675         LIST_INIT(&m->shared_keys);
2676         /* add default NULL key as key id 0 */
2677         null_key = sctp_alloc_sharedkey();
2678         sctp_insert_sharedkey(&m->shared_keys, null_key);
2679         SCTP_INP_WUNLOCK(inp);
2680 #ifdef SCTP_LOG_CLOSING
2681         sctp_log_closing(inp, NULL, 12);
2682 #endif
2683         return (error);
2684 }
2685
2686
2687 void
2688 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2689     struct sctp_tcb *stcb)
2690 {
2691         struct sctp_nets *net;
2692         uint16_t lport, rport;
2693         struct sctppcbhead *head;
2694         struct sctp_laddr *laddr, *oladdr;
2695
2696         atomic_add_int(&stcb->asoc.refcnt, 1);
2697         SCTP_TCB_UNLOCK(stcb);
2698         SCTP_INP_INFO_WLOCK();
2699         SCTP_INP_WLOCK(old_inp);
2700         SCTP_INP_WLOCK(new_inp);
2701         SCTP_TCB_LOCK(stcb);
2702         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2703
2704         new_inp->sctp_ep.time_of_secret_change =
2705             old_inp->sctp_ep.time_of_secret_change;
2706         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2707             sizeof(old_inp->sctp_ep.secret_key));
2708         new_inp->sctp_ep.current_secret_number =
2709             old_inp->sctp_ep.current_secret_number;
2710         new_inp->sctp_ep.last_secret_number =
2711             old_inp->sctp_ep.last_secret_number;
2712         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2713
2714         /* make it so new data pours into the new socket */
2715         stcb->sctp_socket = new_inp->sctp_socket;
2716         stcb->sctp_ep = new_inp;
2717
2718         /* Copy the port across */
2719         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2720         rport = stcb->rport;
2721         /* Pull the tcb from the old association */
2722         LIST_REMOVE(stcb, sctp_tcbhash);
2723         LIST_REMOVE(stcb, sctp_tcblist);
2724         if (stcb->asoc.in_asocid_hash) {
2725                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2726         }
2727         /* Now insert the new_inp into the TCP connected hash */
2728         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2729
2730         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2731         /* Its safe to access */
2732         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2733
2734         /* Now move the tcb into the endpoint list */
2735         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2736         /*
2737          * Question, do we even need to worry about the ep-hash since we
2738          * only have one connection? Probably not :> so lets get rid of it
2739          * and not suck up any kernel memory in that.
2740          */
2741         if (stcb->asoc.in_asocid_hash) {
2742                 struct sctpasochead *lhd;
2743
2744                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2745                     new_inp->hashasocidmark)];
2746                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2747         }
2748         /* Ok. Let's restart timer. */
2749         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2750                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2751                     stcb, net);
2752         }
2753
2754         SCTP_INP_INFO_WUNLOCK();
2755         if (new_inp->sctp_tcbhash != NULL) {
2756                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2757                 new_inp->sctp_tcbhash = NULL;
2758         }
2759         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2760                 /* Subset bound, so copy in the laddr list from the old_inp */
2761                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2762                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2763                         if (laddr == NULL) {
2764                                 /*
2765                                  * Gak, what can we do? This assoc is really
2766                                  * HOSED. We probably should send an abort
2767                                  * here.
2768                                  */
2769                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2770                                 continue;
2771                         }
2772                         SCTP_INCR_LADDR_COUNT();
2773                         bzero(laddr, sizeof(*laddr));
2774                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2775                         laddr->ifa = oladdr->ifa;
2776                         atomic_add_int(&laddr->ifa->refcount, 1);
2777                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2778                             sctp_nxt_addr);
2779                         new_inp->laddr_count++;
2780                         if (oladdr == stcb->asoc.last_used_address) {
2781                                 stcb->asoc.last_used_address = laddr;
2782                         }
2783                 }
2784         }
2785         /*
2786          * Now any running timers need to be adjusted since we really don't
2787          * care if they are running or not just blast in the new_inp into
2788          * all of them.
2789          */
2790
2791         stcb->asoc.dack_timer.ep = (void *)new_inp;
2792         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2793         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2794         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2795         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2796         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2797         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2798         /* now what about the nets? */
2799         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2800                 net->pmtu_timer.ep = (void *)new_inp;
2801                 net->hb_timer.ep = (void *)new_inp;
2802                 net->rxt_timer.ep = (void *)new_inp;
2803         }
2804         SCTP_INP_WUNLOCK(new_inp);
2805         SCTP_INP_WUNLOCK(old_inp);
2806 }
2807
2808
2809
2810
2811 /* sctp_ifap is used to bypass normal local address validation checks */
2812 int
2813 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2814     struct sctp_ifa *sctp_ifap, struct thread *p)
2815 {
2816         /* bind a ep to a socket address */
2817         struct sctppcbhead *head;
2818         struct sctp_inpcb *inp, *inp_tmp;
2819         struct inpcb *ip_inp;
2820         int port_reuse_active = 0;
2821         int bindall;
2822         uint16_t lport;
2823         int error;
2824         uint32_t vrf_id;
2825
2826         lport = 0;
2827         error = 0;
2828         bindall = 1;
2829         inp = (struct sctp_inpcb *)so->so_pcb;
2830         ip_inp = (struct inpcb *)so->so_pcb;
2831 #ifdef SCTP_DEBUG
2832         if (addr) {
2833                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2834                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2835                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2836                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2837         }
2838 #endif
2839         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2840                 /* already did a bind, subsequent binds NOT allowed ! */
2841                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2842                 return (EINVAL);
2843         }
2844 #ifdef INVARIANTS
2845         if (p == NULL)
2846                 panic("null proc/thread");
2847 #endif
2848         if (addr != NULL) {
2849                 switch (addr->sa_family) {
2850 #ifdef INET
2851                 case AF_INET:
2852                         {
2853                                 struct sockaddr_in *sin;
2854
2855                                 /* IPV6_V6ONLY socket? */
2856                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2857                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2858                                         return (EINVAL);
2859                                 }
2860                                 if (addr->sa_len != sizeof(*sin)) {
2861                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2862                                         return (EINVAL);
2863                                 }
2864                                 sin = (struct sockaddr_in *)addr;
2865                                 lport = sin->sin_port;
2866                                 /*
2867                                  * For LOOPBACK the prison_local_ip4() call
2868                                  * will transmute the ip address to the
2869                                  * proper value.
2870                                  */
2871                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2872                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2873                                         return (error);
2874                                 }
2875                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2876                                         bindall = 0;
2877                                 }
2878                                 break;
2879                         }
2880 #endif
2881 #ifdef INET6
2882                 case AF_INET6:
2883                         {
2884                                 /*
2885                                  * Only for pure IPv6 Address. (No IPv4
2886                                  * Mapped!)
2887                                  */
2888                                 struct sockaddr_in6 *sin6;
2889
2890                                 sin6 = (struct sockaddr_in6 *)addr;
2891
2892                                 if (addr->sa_len != sizeof(*sin6)) {
2893                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2894                                         return (EINVAL);
2895                                 }
2896                                 lport = sin6->sin6_port;
2897
2898                                 /*
2899                                  * For LOOPBACK the prison_local_ip6() call
2900                                  * will transmute the ipv6 address to the
2901                                  * proper value.
2902                                  */
2903                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2904                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2905                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2906                                         return (error);
2907                                 }
2908                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2909                                         bindall = 0;
2910                                         /* KAME hack: embed scopeid */
2911                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2912                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2913                                                 return (EINVAL);
2914                                         }
2915                                 }
2916                                 /* this must be cleared for ifa_ifwithaddr() */
2917                                 sin6->sin6_scope_id = 0;
2918                                 break;
2919                         }
2920 #endif
2921                 default:
2922                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2923                         return (EAFNOSUPPORT);
2924                 }
2925         }
2926         SCTP_INP_INFO_WLOCK();
2927         SCTP_INP_WLOCK(inp);
2928         /* Setup a vrf_id to be the default for the non-bind-all case. */
2929         vrf_id = inp->def_vrf_id;
2930
2931         /* increase our count due to the unlock we do */
2932         SCTP_INP_INCR_REF(inp);
2933         if (lport) {
2934                 /*
2935                  * Did the caller specify a port? if so we must see if a ep
2936                  * already has this one bound.
2937                  */
2938                 /* got to be root to get at low ports */
2939                 if (ntohs(lport) < IPPORT_RESERVED) {
2940                         if (p && (error =
2941                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2942                             )) {
2943                                 SCTP_INP_DECR_REF(inp);
2944                                 SCTP_INP_WUNLOCK(inp);
2945                                 SCTP_INP_INFO_WUNLOCK();
2946                                 return (error);
2947                         }
2948                 }
2949                 if (p == NULL) {
2950                         SCTP_INP_DECR_REF(inp);
2951                         SCTP_INP_WUNLOCK(inp);
2952                         SCTP_INP_INFO_WUNLOCK();
2953                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2954                         return (error);
2955                 }
2956                 SCTP_INP_WUNLOCK(inp);
2957                 if (bindall) {
2958                         vrf_id = inp->def_vrf_id;
2959                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2960                         if (inp_tmp != NULL) {
2961                                 /*
2962                                  * lock guy returned and lower count note
2963                                  * that we are not bound so inp_tmp should
2964                                  * NEVER be inp. And it is this inp
2965                                  * (inp_tmp) that gets the reference bump,
2966                                  * so we must lower it.
2967                                  */
2968                                 SCTP_INP_DECR_REF(inp_tmp);
2969                                 /* unlock info */
2970                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2971                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2972                                         /*
2973                                          * Ok, must be one-2-one and
2974                                          * allowing port re-use
2975                                          */
2976                                         port_reuse_active = 1;
2977                                         goto continue_anyway;
2978                                 }
2979                                 SCTP_INP_DECR_REF(inp);
2980                                 SCTP_INP_INFO_WUNLOCK();
2981                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2982                                 return (EADDRINUSE);
2983                         }
2984                 } else {
2985                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2986                         if (inp_tmp != NULL) {
2987                                 /*
2988                                  * lock guy returned and lower count note
2989                                  * that we are not bound so inp_tmp should
2990                                  * NEVER be inp. And it is this inp
2991                                  * (inp_tmp) that gets the reference bump,
2992                                  * so we must lower it.
2993                                  */
2994                                 SCTP_INP_DECR_REF(inp_tmp);
2995                                 /* unlock info */
2996                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2997                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2998                                         /*
2999                                          * Ok, must be one-2-one and
3000                                          * allowing port re-use
3001                                          */
3002                                         port_reuse_active = 1;
3003                                         goto continue_anyway;
3004                                 }
3005                                 SCTP_INP_DECR_REF(inp);
3006                                 SCTP_INP_INFO_WUNLOCK();
3007                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3008                                 return (EADDRINUSE);
3009                         }
3010                 }
3011 continue_anyway:
3012                 SCTP_INP_WLOCK(inp);
3013                 if (bindall) {
3014                         /* verify that no lport is not used by a singleton */
3015                         if ((port_reuse_active == 0) &&
3016                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
3017                             ) {
3018                                 /* Sorry someone already has this one bound */
3019                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3020                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3021                                         port_reuse_active = 1;
3022                                 } else {
3023                                         SCTP_INP_DECR_REF(inp);
3024                                         SCTP_INP_WUNLOCK(inp);
3025                                         SCTP_INP_INFO_WUNLOCK();
3026                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3027                                         return (EADDRINUSE);
3028                                 }
3029                         }
3030                 }
3031         } else {
3032                 uint16_t first, last, candidate;
3033                 uint16_t count;
3034                 int done;
3035
3036                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3037                         first = MODULE_GLOBAL(ipport_hifirstauto);
3038                         last = MODULE_GLOBAL(ipport_hilastauto);
3039                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3040                         if (p && (error =
3041                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3042                             )) {
3043                                 SCTP_INP_DECR_REF(inp);
3044                                 SCTP_INP_WUNLOCK(inp);
3045                                 SCTP_INP_INFO_WUNLOCK();
3046                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3047                                 return (error);
3048                         }
3049                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3050                         last = MODULE_GLOBAL(ipport_lowlastauto);
3051                 } else {
3052                         first = MODULE_GLOBAL(ipport_firstauto);
3053                         last = MODULE_GLOBAL(ipport_lastauto);
3054                 }
3055                 if (first > last) {
3056                         uint16_t temp;
3057
3058                         temp = first;
3059                         first = last;
3060                         last = temp;
3061                 }
3062                 count = last - first + 1;       /* number of candidates */
3063                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3064
3065                 done = 0;
3066                 while (!done) {
3067                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3068                                 done = 1;
3069                         }
3070                         if (!done) {
3071                                 if (--count == 0) {
3072                                         SCTP_INP_DECR_REF(inp);
3073                                         SCTP_INP_WUNLOCK(inp);
3074                                         SCTP_INP_INFO_WUNLOCK();
3075                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3076                                         return (EADDRINUSE);
3077                                 }
3078                                 if (candidate == last)
3079                                         candidate = first;
3080                                 else
3081                                         candidate = candidate + 1;
3082                         }
3083                 }
3084                 lport = htons(candidate);
3085         }
3086         SCTP_INP_DECR_REF(inp);
3087         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3088             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3089                 /*
3090                  * this really should not happen. The guy did a non-blocking
3091                  * bind and then did a close at the same time.
3092                  */
3093                 SCTP_INP_WUNLOCK(inp);
3094                 SCTP_INP_INFO_WUNLOCK();
3095                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3096                 return (EINVAL);
3097         }
3098         /* ok we look clear to give out this port, so lets setup the binding */
3099         if (bindall) {
3100                 /* binding to all addresses, so just set in the proper flags */
3101                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3102                 /* set the automatic addr changes from kernel flag */
3103                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3104                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3105                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3106                 } else {
3107                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3108                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3109                 }
3110                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3111                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3112                 } else {
3113                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3114                 }
3115                 /*
3116                  * set the automatic mobility_base from kernel flag (by
3117                  * micchie)
3118                  */
3119                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3120                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3121                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3122                 } else {
3123                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3124                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3125                 }
3126                 /*
3127                  * set the automatic mobility_fasthandoff from kernel flag
3128                  * (by micchie)
3129                  */
3130                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3131                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3132                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3133                 } else {
3134                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3135                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3136                 }
3137         } else {
3138                 /*
3139                  * bind specific, make sure flags is off and add a new
3140                  * address structure to the sctp_addr_list inside the ep
3141                  * structure.
3142                  *
3143                  * We will need to allocate one and insert it at the head. The
3144                  * socketopt call can just insert new addresses in there as
3145                  * well. It will also have to do the embed scope kame hack
3146                  * too (before adding).
3147                  */
3148                 struct sctp_ifa *ifa;
3149                 struct sockaddr_storage store_sa;
3150
3151                 memset(&store_sa, 0, sizeof(store_sa));
3152                 switch (addr->sa_family) {
3153                 case AF_INET:
3154                         {
3155                                 struct sockaddr_in *sin;
3156
3157                                 sin = (struct sockaddr_in *)&store_sa;
3158                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3159                                 sin->sin_port = 0;
3160                                 break;
3161                         }
3162                 case AF_INET6:
3163                         {
3164                                 struct sockaddr_in6 *sin6;
3165
3166                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3167                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3168                                 sin6->sin6_port = 0;
3169                                 break;
3170                         }
3171                 default:
3172                         break;
3173                 }
3174                 /*
3175                  * first find the interface with the bound address need to
3176                  * zero out the port to find the address! yuck! can't do
3177                  * this earlier since need port for sctp_pcb_findep()
3178                  */
3179                 if (sctp_ifap != NULL)
3180                         ifa = sctp_ifap;
3181                 else {
3182                         /*
3183                          * Note for BSD we hit here always other O/S's will
3184                          * pass things in via the sctp_ifap argument
3185                          * (Panda).
3186                          */
3187                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3188                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3189                 }
3190                 if (ifa == NULL) {
3191                         /* Can't find an interface with that address */
3192                         SCTP_INP_WUNLOCK(inp);
3193                         SCTP_INP_INFO_WUNLOCK();
3194                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3195                         return (EADDRNOTAVAIL);
3196                 }
3197 #ifdef INET6
3198                 if (addr->sa_family == AF_INET6) {
3199                         /* GAK, more FIXME IFA lock? */
3200                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3201                                 /* Can't bind a non-existent addr. */
3202                                 SCTP_INP_WUNLOCK(inp);
3203                                 SCTP_INP_INFO_WUNLOCK();
3204                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3205                                 return (EINVAL);
3206                         }
3207                 }
3208 #endif
3209                 /* we're not bound all */
3210                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3211                 /* allow bindx() to send ASCONF's for binding changes */
3212                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3213                 /* clear automatic addr changes from kernel flag */
3214                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3215
3216                 /* add this address to the endpoint list */
3217                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3218                 if (error != 0) {
3219                         SCTP_INP_WUNLOCK(inp);
3220                         SCTP_INP_INFO_WUNLOCK();
3221                         return (error);
3222                 }
3223                 inp->laddr_count++;
3224         }
3225         /* find the bucket */
3226         if (port_reuse_active) {
3227                 /* Put it into tcp 1-2-1 hash */
3228                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3229                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3230         } else {
3231                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3232         }
3233         /* put it in the bucket */
3234         LIST_INSERT_HEAD(head, inp, sctp_hash);
3235         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3236             head, ntohs(lport), port_reuse_active);
3237         /* set in the port */
3238         inp->sctp_lport = lport;
3239
3240         /* turn off just the unbound flag */
3241         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3242         SCTP_INP_WUNLOCK(inp);
3243         SCTP_INP_INFO_WUNLOCK();
3244         return (0);
3245 }
3246
3247
3248 static void
3249 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3250 {
3251         struct sctp_iterator *it, *nit;
3252
3253         /*
3254          * We enter with the only the ITERATOR_LOCK in place and a write
3255          * lock on the inp_info stuff.
3256          */
3257         it = sctp_it_ctl.cur_it;
3258         if (it && (it->vn != curvnet)) {
3259                 /* Its not looking at our VNET */
3260                 return;
3261         }
3262         if (it && (it->inp == inp)) {
3263                 /*
3264                  * This is tricky and we hold the iterator lock, but when it
3265                  * returns and gets the lock (when we release it) the
3266                  * iterator will try to operate on inp. We need to stop that
3267                  * from happening. But of course the iterator has a
3268                  * reference on the stcb and inp. We can mark it and it will
3269                  * stop.
3270                  *
3271                  * If its a single iterator situation, we set the end iterator
3272                  * flag. Otherwise we set the iterator to go to the next
3273                  * inp.
3274                  *
3275                  */
3276                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3277                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3278                 } else {
3279                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3280                 }
3281         }
3282         /*
3283          * Now go through and remove any single reference to our inp that
3284          * may be still pending on the list
3285          */
3286         SCTP_IPI_ITERATOR_WQ_LOCK();
3287         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3288                 if (it->vn != curvnet) {
3289                         continue;
3290                 }
3291                 if (it->inp == inp) {
3292                         /* This one points to me is it inp specific? */
3293                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3294                                 /* Remove and free this one */
3295                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3296                                     it, sctp_nxt_itr);
3297                                 if (it->function_atend != NULL) {
3298                                         (*it->function_atend) (it->pointer, it->val);
3299                                 }
3300                                 SCTP_FREE(it, SCTP_M_ITER);
3301                         } else {
3302                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3303                                 if (it->inp) {
3304                                         SCTP_INP_INCR_REF(it->inp);
3305                                 }
3306                         }
3307                         /*
3308                          * When its put in the refcnt is incremented so decr
3309                          * it
3310                          */
3311                         SCTP_INP_DECR_REF(inp);
3312                 }
3313         }
3314         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3315 }
3316
3317 /* release sctp_inpcb unbind the port */
3318 void
3319 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3320 {
3321         /*
3322          * Here we free a endpoint. We must find it (if it is in the Hash
3323          * table) and remove it from there. Then we must also find it in the
3324          * overall list and remove it from there. After all removals are
3325          * complete then any timer has to be stopped. Then start the actual
3326          * freeing. a) Any local lists. b) Any associations. c) The hash of
3327          * all associations. d) finally the ep itself.
3328          */
3329         struct sctp_tcb *asoc, *nasoc;
3330         struct sctp_laddr *laddr, *nladdr;
3331         struct inpcb *ip_pcb;
3332         struct socket *so;
3333         int being_refed = 0;
3334         struct sctp_queued_to_read *sq, *nsq;
3335         int cnt;
3336         sctp_sharedkey_t *shared_key, *nshared_key;
3337
3338
3339 #ifdef SCTP_LOG_CLOSING
3340         sctp_log_closing(inp, NULL, 0);
3341 #endif
3342         SCTP_ITERATOR_LOCK();
3343         /* mark any iterators on the list or being processed */
3344         sctp_iterator_inp_being_freed(inp);
3345         SCTP_ITERATOR_UNLOCK();
3346         so = inp->sctp_socket;
3347         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3348                 /* been here before.. eeks.. get out of here */
3349                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3350 #ifdef SCTP_LOG_CLOSING
3351                 sctp_log_closing(inp, NULL, 1);
3352 #endif
3353                 return;
3354         }
3355         SCTP_ASOC_CREATE_LOCK(inp);
3356         SCTP_INP_INFO_WLOCK();
3357
3358         SCTP_INP_WLOCK(inp);
3359         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3360                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3361                 /* socket is gone, so no more wakeups allowed */
3362                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3363                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3364                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3365
3366         }
3367         /* First time through we have the socket lock, after that no more. */
3368         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3369             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3370
3371         if (inp->control) {
3372                 sctp_m_freem(inp->control);
3373                 inp->control = NULL;
3374         }
3375         if (inp->pkt) {
3376                 sctp_m_freem(inp->pkt);
3377                 inp->pkt = NULL;
3378         }
3379         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3380                                          * here but I will be nice :> (i.e.
3381                                          * ip_pcb = ep;) */
3382         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3383                 int cnt_in_sd;
3384
3385                 cnt_in_sd = 0;
3386                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3387                         SCTP_TCB_LOCK(asoc);
3388                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3389                                 /* Skip guys being freed */
3390                                 cnt_in_sd++;
3391                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3392                                         /*
3393                                          * Special case - we did not start a
3394                                          * kill timer on the asoc due to it
3395                                          * was not closed. So go ahead and
3396                                          * start it now.
3397                                          */
3398                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3399                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3400                                 }
3401                                 SCTP_TCB_UNLOCK(asoc);
3402                                 continue;
3403                         }
3404                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3405                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3406                             (asoc->asoc.total_output_queue_size == 0)) {
3407                                 /*
3408                                  * If we have data in queue, we don't want
3409                                  * to just free since the app may have done,
3410                                  * send()/close or connect/send/close. And
3411                                  * it wants the data to get across first.
3412                                  */
3413                                 /* Just abandon things in the front states */
3414                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3415                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3416                                         cnt_in_sd++;
3417                                 }
3418                                 continue;
3419                         }
3420                         /* Disconnect the socket please */
3421                         asoc->sctp_socket = NULL;
3422                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3423                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3424                             (asoc->asoc.control_pdapi) ||
3425                             (asoc->asoc.size_on_all_streams > 0) ||
3426                             (so && (so->so_rcv.sb_cc > 0))) {
3427                                 /* Left with Data unread */
3428                                 struct mbuf *op_err;
3429
3430                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3431                                     0, M_DONTWAIT, 1, MT_DATA);
3432                                 if (op_err) {
3433                                         /* Fill in the user initiated abort */
3434                                         struct sctp_paramhdr *ph;
3435                                         uint32_t *ippp;
3436
3437                                         SCTP_BUF_LEN(op_err) =
3438                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3439                                         ph = mtod(op_err,
3440                                             struct sctp_paramhdr *);
3441                                         ph->param_type = htons(
3442                                             SCTP_CAUSE_USER_INITIATED_ABT);
3443                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3444                                         ippp = (uint32_t *) (ph + 1);
3445                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3446                                 }
3447                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3448 #if defined(SCTP_PANIC_ON_ABORT)
3449                                 panic("inpcb_free does an abort");
3450 #endif
3451                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3452                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3453                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3454                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3455                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3456                                 }
3457                                 if (sctp_free_assoc(inp, asoc,
3458                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3459                                         cnt_in_sd++;
3460                                 }
3461                                 continue;
3462                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3463                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3464                                     (asoc->asoc.stream_queue_cnt == 0)
3465                             ) {
3466                                 if (asoc->asoc.locked_on_sending) {
3467                                         goto abort_anyway;
3468                                 }
3469                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3470                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3471                                         struct sctp_nets *netp;
3472
3473                                         if (asoc->asoc.alternate) {
3474                                                 netp = asoc->asoc.alternate;
3475                                         } else {
3476                                                 netp = asoc->asoc.primary_destination;
3477                                         }
3478                                         /*
3479                                          * there is nothing queued to send,
3480                                          * so I send shutdown
3481                                          */
3482                                         sctp_send_shutdown(asoc, netp);
3483                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3484                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3485                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3486                                         }
3487                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3488                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3489                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3490                                             netp);
3491                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3492                                             asoc->asoc.primary_destination);
3493                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3494                                 }
3495                         } else {
3496                                 /* mark into shutdown pending */
3497                                 struct sctp_stream_queue_pending *sp;
3498
3499                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3500                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3501                                     asoc->asoc.primary_destination);
3502                                 if (asoc->asoc.locked_on_sending) {
3503                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3504                                             sctp_streamhead);
3505                                         if (sp == NULL) {
3506                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3507                                                     asoc->asoc.locked_on_sending,
3508                                                     asoc->asoc.locked_on_sending->stream_no);
3509                                         } else {
3510                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3511                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3512                                         }
3513                                 }
3514                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3515                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3516                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3517                                         struct mbuf *op_err;
3518
3519                         abort_anyway:
3520                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3521                                             0, M_DONTWAIT, 1, MT_DATA);
3522                                         if (op_err) {
3523                                                 /*
3524                                                  * Fill in the user
3525                                                  * initiated abort
3526                                                  */
3527                                                 struct sctp_paramhdr *ph;
3528                                                 uint32_t *ippp;
3529
3530                                                 SCTP_BUF_LEN(op_err) =
3531                                                     (sizeof(struct sctp_paramhdr) +
3532                                                     sizeof(uint32_t));
3533                                                 ph = mtod(op_err,
3534                                                     struct sctp_paramhdr *);
3535                                                 ph->param_type = htons(
3536                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3537                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3538                                                 ippp = (uint32_t *) (ph + 1);
3539                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3540                                         }
3541                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3542 #if defined(SCTP_PANIC_ON_ABORT)
3543                                         panic("inpcb_free does an abort");
3544 #endif
3545
3546                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3547                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3548                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3549                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3550                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3551                                         }
3552                                         if (sctp_free_assoc(inp, asoc,
3553                                             SCTP_PCBFREE_NOFORCE,
3554                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3555                                                 cnt_in_sd++;
3556                                         }
3557                                         continue;
3558                                 } else {
3559                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3560                                 }
3561                         }
3562                         cnt_in_sd++;
3563                         SCTP_TCB_UNLOCK(asoc);
3564                 }
3565                 /* now is there some left in our SHUTDOWN state? */
3566                 if (cnt_in_sd) {
3567 #ifdef SCTP_LOG_CLOSING
3568                         sctp_log_closing(inp, NULL, 2);
3569 #endif
3570                         inp->sctp_socket = NULL;
3571                         SCTP_INP_WUNLOCK(inp);
3572                         SCTP_ASOC_CREATE_UNLOCK(inp);
3573                         SCTP_INP_INFO_WUNLOCK();
3574                         return;
3575                 }
3576         }
3577         inp->sctp_socket = NULL;
3578         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3579             SCTP_PCB_FLAGS_UNBOUND) {
3580                 /*
3581                  * ok, this guy has been bound. It's port is somewhere in
3582                  * the SCTP_BASE_INFO(hash table). Remove it!
3583                  */
3584                 LIST_REMOVE(inp, sctp_hash);
3585                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3586         }
3587         /*
3588          * If there is a timer running to kill us, forget it, since it may
3589          * have a contest on the INP lock.. which would cause us to die ...
3590          */
3591         cnt = 0;
3592         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3593                 SCTP_TCB_LOCK(asoc);
3594                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3595                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3596                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3597                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3598                         }
3599                         cnt++;
3600                         SCTP_TCB_UNLOCK(asoc);
3601                         continue;
3602                 }
3603                 /* Free associations that are NOT killing us */
3604                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3605                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3606                         struct mbuf *op_err;
3607                         uint32_t *ippp;
3608
3609                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3610                             0, M_DONTWAIT, 1, MT_DATA);
3611                         if (op_err) {
3612                                 /* Fill in the user initiated abort */
3613                                 struct sctp_paramhdr *ph;
3614
3615                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3616                                     sizeof(uint32_t));
3617                                 ph = mtod(op_err, struct sctp_paramhdr *);
3618                                 ph->param_type = htons(
3619                                     SCTP_CAUSE_USER_INITIATED_ABT);
3620                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3621                                 ippp = (uint32_t *) (ph + 1);
3622                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3623
3624                         }
3625                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3626 #if defined(SCTP_PANIC_ON_ABORT)
3627                         panic("inpcb_free does an abort");
3628 #endif
3629                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3630                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3631                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3632                         cnt++;
3633                         SCTP_TCB_UNLOCK(asoc);
3634                         continue;
3635                 }
3636                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3637                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3638                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3639                 }
3640                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3641                         cnt++;
3642                 }
3643         }
3644         if (cnt) {
3645                 /* Ok we have someone out there that will kill us */
3646                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3647 #ifdef SCTP_LOG_CLOSING
3648                 sctp_log_closing(inp, NULL, 3);
3649 #endif
3650                 SCTP_INP_WUNLOCK(inp);
3651                 SCTP_ASOC_CREATE_UNLOCK(inp);
3652                 SCTP_INP_INFO_WUNLOCK();
3653                 return;
3654         }
3655         if (SCTP_INP_LOCK_CONTENDED(inp))
3656                 being_refed++;
3657         if (SCTP_INP_READ_CONTENDED(inp))
3658                 being_refed++;
3659         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3660                 being_refed++;
3661
3662         if ((inp->refcount) ||
3663             (being_refed) ||
3664             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3665                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3666 #ifdef SCTP_LOG_CLOSING
3667                 sctp_log_closing(inp, NULL, 4);
3668 #endif
3669                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3670                 SCTP_INP_WUNLOCK(inp);
3671                 SCTP_ASOC_CREATE_UNLOCK(inp);
3672                 SCTP_INP_INFO_WUNLOCK();
3673                 return;
3674         }
3675         inp->sctp_ep.signature_change.type = 0;
3676         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3677         /*
3678          * Remove it from the list .. last thing we need a lock for.
3679          */
3680         LIST_REMOVE(inp, sctp_list);
3681         SCTP_INP_WUNLOCK(inp);
3682         SCTP_ASOC_CREATE_UNLOCK(inp);
3683         SCTP_INP_INFO_WUNLOCK();
3684         /*
3685          * Now we release all locks. Since this INP cannot be found anymore
3686          * except possibly by the kill timer that might be running. We call
3687          * the drain function here. It should hit the case were it sees the
3688          * ACTIVE flag cleared and exit out freeing us to proceed and
3689          * destroy everything.
3690          */
3691         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3692                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3693         } else {
3694                 /* Probably un-needed */
3695                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3696         }
3697
3698 #ifdef SCTP_LOG_CLOSING
3699         sctp_log_closing(inp, NULL, 5);
3700 #endif
3701
3702
3703         if ((inp->sctp_asocidhash) != NULL) {
3704                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3705                 inp->sctp_asocidhash = NULL;
3706         }
3707         /* sa_ignore FREED_MEMORY */
3708         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3709                 /* Its only abandoned if it had data left */
3710                 if (sq->length)
3711                         SCTP_STAT_INCR(sctps_left_abandon);
3712
3713                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3714                 sctp_free_remote_addr(sq->whoFrom);
3715                 if (so)
3716                         so->so_rcv.sb_cc -= sq->length;
3717                 if (sq->data) {
3718                         sctp_m_freem(sq->data);
3719                         sq->data = NULL;
3720                 }
3721                 /*
3722                  * no need to free the net count, since at this point all
3723                  * assoc's are gone.
3724                  */
3725                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3726                 SCTP_DECR_READQ_COUNT();
3727         }
3728         /* Now the sctp_pcb things */
3729         /*
3730          * free each asoc if it is not already closed/free. we can't use the
3731          * macro here since le_next will get freed as part of the
3732          * sctp_free_assoc() call.
3733          */
3734         if (so) {
3735 #ifdef IPSEC
3736                 ipsec_delete_pcbpolicy(ip_pcb);
3737 #endif                          /* IPSEC */
3738
3739                 /* Unlocks not needed since the socket is gone now */
3740         }
3741         if (ip_pcb->inp_options) {
3742                 (void)sctp_m_free(ip_pcb->inp_options);
3743                 ip_pcb->inp_options = 0;
3744         }
3745 #ifdef INET6
3746         if (ip_pcb->inp_vflag & INP_IPV6) {
3747                 struct in6pcb *in6p;
3748
3749                 in6p = (struct in6pcb *)inp;
3750                 ip6_freepcbopts(in6p->in6p_outputopts);
3751         }
3752 #endif                          /* INET6 */
3753         ip_pcb->inp_vflag = 0;
3754         /* free up authentication fields */
3755         if (inp->sctp_ep.local_auth_chunks != NULL)
3756                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3757         if (inp->sctp_ep.local_hmacs != NULL)
3758                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3759
3760         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3761                 LIST_REMOVE(shared_key, next);
3762                 sctp_free_sharedkey(shared_key);
3763                 /* sa_ignore FREED_MEMORY */
3764         }
3765
3766         /*
3767          * if we have an address list the following will free the list of
3768          * ifaddr's that are set into this ep. Again macro limitations here,
3769          * since the LIST_FOREACH could be a bad idea.
3770          */
3771         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3772                 sctp_remove_laddr(laddr);
3773         }
3774
3775 #ifdef SCTP_TRACK_FREED_ASOCS
3776         /* TEMP CODE */
3777         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3778                 LIST_REMOVE(asoc, sctp_tcblist);
3779                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3780                 SCTP_DECR_ASOC_COUNT();
3781         }
3782         /* *** END TEMP CODE *** */
3783 #endif
3784         /* Now lets see about freeing the EP hash table. */
3785         if (inp->sctp_tcbhash != NULL) {
3786                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3787                 inp->sctp_tcbhash = NULL;
3788         }
3789         /* Now we must put the ep memory back into the zone pool */
3790         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3791         SCTP_INP_LOCK_DESTROY(inp);
3792         SCTP_INP_READ_DESTROY(inp);
3793         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3794         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3795         SCTP_DECR_EP_COUNT();
3796 }
3797
3798
3799 struct sctp_nets *
3800 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3801 {
3802         struct sctp_nets *net;
3803
3804         /* locate the address */
3805         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3806                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3807                         return (net);
3808         }
3809         return (NULL);
3810 }
3811
3812
3813 int
3814 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3815 {
3816         struct sctp_ifa *sctp_ifa;
3817
3818         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3819         if (sctp_ifa) {
3820                 return (1);
3821         } else {
3822                 return (0);
3823         }
3824 }
3825
3826 /*
3827  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3828  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3829  * stats of stuff.
3830  */
3831 int
3832 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3833     struct sctp_nets **netp, int set_scope, int from)
3834 {
3835         /*
3836          * The following is redundant to the same lines in the
3837          * sctp_aloc_assoc() but is needed since others call the add address
3838          * function
3839          */
3840         struct sctp_nets *net, *netfirst;
3841         int addr_inscope;
3842
3843         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3844             from);
3845         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3846
3847         netfirst = sctp_findnet(stcb, newaddr);
3848         if (netfirst) {
3849                 /*
3850                  * Lie and return ok, we don't want to make the association
3851                  * go away for this behavior. It will happen in the TCP
3852                  * model in a connected socket. It does not reach the hash
3853                  * table until after the association is built so it can't be
3854                  * found. Mark as reachable, since the initial creation will
3855                  * have been cleared and the NOT_IN_ASSOC flag will have
3856                  * been added... and we don't want to end up removing it
3857                  * back out.
3858                  */
3859                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3860                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3861                             SCTP_ADDR_UNCONFIRMED);
3862                 } else {
3863                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3864                 }
3865
3866                 return (0);
3867         }
3868         addr_inscope = 1;
3869         switch (newaddr->sa_family) {
3870 #ifdef INET
3871         case AF_INET:
3872                 {
3873                         struct sockaddr_in *sin;
3874
3875                         sin = (struct sockaddr_in *)newaddr;
3876                         if (sin->sin_addr.s_addr == 0) {
3877                                 /* Invalid address */
3878                                 return (-1);
3879                         }
3880                         /* zero out the bzero area */
3881                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3882
3883                         /* assure len is set */
3884                         sin->sin_len = sizeof(struct sockaddr_in);
3885                         if (set_scope) {
3886 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3887                                 stcb->ipv4_local_scope = 1;
3888 #else
3889                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3890                                         stcb->asoc.ipv4_local_scope = 1;
3891                                 }
3892 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3893                         } else {
3894                                 /* Validate the address is in scope */
3895                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3896                                     (stcb->asoc.ipv4_local_scope == 0)) {
3897                                         addr_inscope = 0;
3898                                 }
3899                         }
3900                         break;
3901                 }
3902 #endif
3903 #ifdef INET6
3904         case AF_INET6:
3905                 {
3906                         struct sockaddr_in6 *sin6;
3907
3908                         sin6 = (struct sockaddr_in6 *)newaddr;
3909                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3910                                 /* Invalid address */
3911                                 return (-1);
3912                         }
3913                         /* assure len is set */
3914                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3915                         if (set_scope) {
3916                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3917                                         stcb->asoc.loopback_scope = 1;
3918                                         stcb->asoc.local_scope = 0;
3919                                         stcb->asoc.ipv4_local_scope = 1;
3920                                         stcb->asoc.site_scope = 1;
3921                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3922                                         /*
3923                                          * If the new destination is a
3924                                          * LINK_LOCAL we must have common
3925                                          * site scope. Don't set the local
3926                                          * scope since we may not share all
3927                                          * links, only loopback can do this.
3928                                          * Links on the local network would
3929                                          * also be on our private network
3930                                          * for v4 too.
3931                                          */
3932                                         stcb->asoc.ipv4_local_scope = 1;
3933                                         stcb->asoc.site_scope = 1;
3934                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3935                                         /*
3936                                          * If the new destination is
3937                                          * SITE_LOCAL then we must have site
3938                                          * scope in common.
3939                                          */
3940                                         stcb->asoc.site_scope = 1;
3941                                 }
3942                         } else {
3943                                 /* Validate the address is in scope */
3944                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3945                                     (stcb->asoc.loopback_scope == 0)) {
3946                                         addr_inscope = 0;
3947                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3948                                     (stcb->asoc.local_scope == 0)) {
3949                                         addr_inscope = 0;
3950                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3951                                     (stcb->asoc.site_scope == 0)) {
3952                                         addr_inscope = 0;
3953                                 }
3954                         }
3955                         break;
3956                 }
3957 #endif
3958         default:
3959                 /* not supported family type */
3960                 return (-1);
3961         }
3962         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3963         if (net == NULL) {
3964                 return (-1);
3965         }
3966         SCTP_INCR_RADDR_COUNT();
3967         bzero(net, sizeof(struct sctp_nets));
3968         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3969         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3970         switch (newaddr->sa_family) {
3971 #ifdef INET
3972         case AF_INET:
3973                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3974                 break;
3975 #endif
3976 #ifdef INET6
3977         case AF_INET6:
3978                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3979                 break;
3980 #endif
3981         default:
3982                 break;
3983         }
3984         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3985         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3986                 stcb->asoc.loopback_scope = 1;
3987                 stcb->asoc.ipv4_local_scope = 1;
3988                 stcb->asoc.local_scope = 0;
3989                 stcb->asoc.site_scope = 1;
3990                 addr_inscope = 1;
3991         }
3992         net->failure_threshold = stcb->asoc.def_net_failure;
3993         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3994         if (addr_inscope == 0) {
3995                 net->dest_state = (SCTP_ADDR_REACHABLE |
3996                     SCTP_ADDR_OUT_OF_SCOPE);
3997         } else {
3998                 if (from == SCTP_ADDR_IS_CONFIRMED)
3999                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
4000                         net->dest_state = SCTP_ADDR_REACHABLE;
4001                 else
4002                         net->dest_state = SCTP_ADDR_REACHABLE |
4003                             SCTP_ADDR_UNCONFIRMED;
4004         }
4005         /*
4006          * We set this to 0, the timer code knows that this means its an
4007          * initial value
4008          */
4009         net->rto_needed = 1;
4010         net->RTO = 0;
4011         net->RTO_measured = 0;
4012         stcb->asoc.numnets++;
4013         *(&net->ref_count) = 1;
4014         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
4015         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
4016                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4017         } else {
4018                 net->port = 0;
4019         }
4020         net->dscp = stcb->asoc.default_dscp;
4021 #ifdef INET6
4022         net->flowlabel = stcb->asoc.default_flowlabel;
4023 #endif
4024         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
4025                 net->dest_state |= SCTP_ADDR_NOHB;
4026         } else {
4027                 net->dest_state &= ~SCTP_ADDR_NOHB;
4028         }
4029         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
4030                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
4031         } else {
4032                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4033         }
4034         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4035         /* Init the timer structure */
4036         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4037         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4038         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4039
4040         /* Now generate a route for this guy */
4041 #ifdef INET6
4042         /* KAME hack: embed scopeid */
4043         if (newaddr->sa_family == AF_INET6) {
4044                 struct sockaddr_in6 *sin6;
4045
4046                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4047                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4048                 sin6->sin6_scope_id = 0;
4049         }
4050 #endif
4051         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
4052
4053         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4054                 /* Get source address */
4055                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4056                     stcb,
4057                     (sctp_route_t *) & net->ro,
4058                     net,
4059                     0,
4060                     stcb->asoc.vrf_id);
4061                 /* Now get the interface MTU */
4062                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4063                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4064                 }
4065                 if (net->mtu > 0) {
4066                         uint32_t rmtu;
4067
4068                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4069                         if (rmtu == 0) {
4070                                 /*
4071                                  * Start things off to match mtu of
4072                                  * interface please.
4073                                  */
4074                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4075                                     net->ro.ro_rt, net->mtu);
4076                         } else {
4077                                 /*
4078                                  * we take the route mtu over the interface,
4079                                  * since the route may be leading out the
4080                                  * loopback, or a different interface.
4081                                  */
4082                                 net->mtu = rmtu;
4083                         }
4084                 }
4085         }
4086         if (net->mtu == 0) {
4087                 switch (newaddr->sa_family) {
4088 #ifdef INET
4089                 case AF_INET:
4090                         net->mtu = SCTP_DEFAULT_MTU;
4091                         break;
4092 #endif
4093 #ifdef INET6
4094                 case AF_INET6:
4095                         net->mtu = 1280;
4096                         break;
4097 #endif
4098                 default:
4099                         break;
4100                 }
4101         }
4102         if (net->port) {
4103                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4104         }
4105         if (from == SCTP_ALLOC_ASOC) {
4106                 stcb->asoc.smallest_mtu = net->mtu;
4107         }
4108         if (stcb->asoc.smallest_mtu > net->mtu) {
4109                 stcb->asoc.smallest_mtu = net->mtu;
4110         }
4111 #ifdef INET6
4112         if (newaddr->sa_family == AF_INET6) {
4113                 struct sockaddr_in6 *sin6;
4114
4115                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4116                 (void)sa6_recoverscope(sin6);
4117         }
4118 #endif
4119
4120         /* JRS - Use the congestion control given in the CC module */
4121         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4122                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4123
4124         /*
4125          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4126          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4127          */
4128         net->find_pseudo_cumack = 1;
4129         net->find_rtx_pseudo_cumack = 1;
4130         net->src_addr_selected = 0;
4131         /* Choose an initial flowid. */
4132         net->flowid = stcb->asoc.my_vtag ^
4133             ntohs(stcb->rport) ^
4134             ntohs(stcb->sctp_ep->sctp_lport);
4135 #ifdef INVARIANTS
4136         net->flowidset = 1;
4137 #endif
4138         if (netp) {
4139                 *netp = net;
4140         }
4141         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4142         if (net->ro.ro_rt == NULL) {
4143                 /* Since we have no route put it at the back */
4144                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4145         } else if (netfirst == NULL) {
4146                 /* We are the first one in the pool. */
4147                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4148         } else if (netfirst->ro.ro_rt == NULL) {
4149                 /*
4150                  * First one has NO route. Place this one ahead of the first
4151                  * one.
4152                  */
4153                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4154         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4155                 /*
4156                  * This one has a different interface than the one at the
4157                  * top of the list. Place it ahead.
4158                  */
4159                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4160         } else {
4161                 /*
4162                  * Ok we have the same interface as the first one. Move
4163                  * forward until we find either a) one with a NULL route...
4164                  * insert ahead of that b) one with a different ifp.. insert
4165                  * after that. c) end of the list.. insert at the tail.
4166                  */
4167                 struct sctp_nets *netlook;
4168
4169                 do {
4170                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4171                         if (netlook == NULL) {
4172                                 /* End of the list */
4173                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4174                                 break;
4175                         } else if (netlook->ro.ro_rt == NULL) {
4176                                 /* next one has NO route */
4177                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4178                                 break;
4179                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4180                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4181                                     net, sctp_next);
4182                                 break;
4183                         }
4184                         /* Shift forward */
4185                         netfirst = netlook;
4186                 } while (netlook != NULL);
4187         }
4188
4189         /* got to have a primary set */
4190         if (stcb->asoc.primary_destination == 0) {
4191                 stcb->asoc.primary_destination = net;
4192         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4193                     (net->ro.ro_rt) &&
4194             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4195                 /* No route to current primary adopt new primary */
4196                 stcb->asoc.primary_destination = net;
4197         }
4198         /* Validate primary is first */
4199         net = TAILQ_FIRST(&stcb->asoc.nets);
4200         if ((net != stcb->asoc.primary_destination) &&
4201             (stcb->asoc.primary_destination)) {
4202                 /*
4203                  * first one on the list is NOT the primary sctp_cmpaddr()
4204                  * is much more efficient if the primary is the first on the
4205                  * list, make it so.
4206                  */
4207                 TAILQ_REMOVE(&stcb->asoc.nets,
4208                     stcb->asoc.primary_destination, sctp_next);
4209                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4210                     stcb->asoc.primary_destination, sctp_next);
4211         }
4212         return (0);
4213 }
4214
4215
4216 static uint32_t
4217 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4218 {
4219         uint32_t id;
4220         struct sctpasochead *head;
4221         struct sctp_tcb *lstcb;
4222
4223         SCTP_INP_WLOCK(inp);
4224 try_again:
4225         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4226                 /* TSNH */
4227                 SCTP_INP_WUNLOCK(inp);
4228                 return (0);
4229         }
4230         /*
4231          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4232          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4233          */
4234         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4235                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4236         }
4237         id = inp->sctp_associd_counter;
4238         inp->sctp_associd_counter++;
4239         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4240         if (lstcb) {
4241                 goto try_again;
4242         }
4243         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4244         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4245         stcb->asoc.in_asocid_hash = 1;
4246         SCTP_INP_WUNLOCK(inp);
4247         return id;
4248 }
4249
4250 /*
4251  * allocate an association and add it to the endpoint. The caller must be
4252  * careful to add all additional addresses once they are know right away or
4253  * else the assoc will be may experience a blackout scenario.
4254  */
4255 struct sctp_tcb *
4256 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4257     int *error, uint32_t override_tag, uint32_t vrf_id,
4258     struct thread *p
4259 )
4260 {
4261         /* note the p argument is only valid in unbound sockets */
4262
4263         struct sctp_tcb *stcb;
4264         struct sctp_association *asoc;
4265         struct sctpasochead *head;
4266         uint16_t rport;
4267         int err;
4268
4269         /*
4270          * Assumption made here: Caller has done a
4271          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4272          * address does not exist already.
4273          */
4274         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4275                 /* Hit max assoc, sorry no more */
4276                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4277                 *error = ENOBUFS;
4278                 return (NULL);
4279         }
4280         if (firstaddr == NULL) {
4281                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4282                 *error = EINVAL;
4283                 return (NULL);
4284         }
4285         SCTP_INP_RLOCK(inp);
4286         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4287             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4288             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4289                 /*
4290                  * If its in the TCP pool, its NOT allowed to create an
4291                  * association. The parent listener needs to call
4292                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4293                  * off, or connected one does this.. its an error.
4294                  */
4295                 SCTP_INP_RUNLOCK(inp);
4296                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4297                 *error = EINVAL;
4298                 return (NULL);
4299         }
4300         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4301             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4302                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4303                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4304                         SCTP_INP_RUNLOCK(inp);
4305                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4306                         *error = EINVAL;
4307                         return (NULL);
4308                 }
4309         }
4310         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4311 #ifdef SCTP_DEBUG
4312         if (firstaddr) {
4313                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4314                 switch (firstaddr->sa_family) {
4315 #ifdef INET
4316                 case AF_INET:
4317                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4318                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4319                         break;
4320 #endif
4321 #ifdef INET6
4322                 case AF_INET6:
4323                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4324                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4325                         break;
4326 #endif
4327                 default:
4328                         break;
4329                 }
4330         } else {
4331                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4332         }
4333 #endif                          /* SCTP_DEBUG */
4334         switch (firstaddr->sa_family) {
4335 #ifdef INET
4336         case AF_INET:
4337                 {
4338                         struct sockaddr_in *sin;
4339
4340                         sin = (struct sockaddr_in *)firstaddr;
4341                         if ((ntohs(sin->sin_port) == 0) ||
4342                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4343                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4344                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4345                                 /* Invalid address */
4346                                 SCTP_INP_RUNLOCK(inp);
4347                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4348                                 *error = EINVAL;
4349                                 return (NULL);
4350                         }
4351                         rport = sin->sin_port;
4352                         break;
4353                 }
4354 #endif
4355 #ifdef INET6
4356         case AF_INET6:
4357                 {
4358                         struct sockaddr_in6 *sin6;
4359
4360                         sin6 = (struct sockaddr_in6 *)firstaddr;
4361                         if ((ntohs(sin6->sin6_port) == 0) ||
4362                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4363                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4364                                 /* Invalid address */
4365                                 SCTP_INP_RUNLOCK(inp);
4366                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4367                                 *error = EINVAL;
4368                                 return (NULL);
4369                         }
4370                         rport = sin6->sin6_port;
4371                         break;
4372                 }
4373 #endif
4374         default:
4375                 /* not supported family type */
4376                 SCTP_INP_RUNLOCK(inp);
4377                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4378                 *error = EINVAL;
4379                 return (NULL);
4380         }
4381         SCTP_INP_RUNLOCK(inp);
4382         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4383                 /*
4384                  * If you have not performed a bind, then we need to do the
4385                  * ephemeral bind for you.
4386                  */
4387                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4388                     (struct sockaddr *)NULL,
4389                     (struct sctp_ifa *)NULL,
4390                     p
4391                     ))) {
4392                         /* bind error, probably perm */
4393                         *error = err;
4394                         return (NULL);
4395                 }
4396         }
4397         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4398         if (stcb == NULL) {
4399                 /* out of memory? */
4400                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4401                 *error = ENOMEM;
4402                 return (NULL);
4403         }
4404         SCTP_INCR_ASOC_COUNT();
4405
4406         bzero(stcb, sizeof(*stcb));
4407         asoc = &stcb->asoc;
4408
4409         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4410         SCTP_TCB_LOCK_INIT(stcb);
4411         SCTP_TCB_SEND_LOCK_INIT(stcb);
4412         stcb->rport = rport;
4413         /* setup back pointer's */
4414         stcb->sctp_ep = inp;
4415         stcb->sctp_socket = inp->sctp_socket;
4416         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4417                 /* failed */
4418                 SCTP_TCB_LOCK_DESTROY(stcb);
4419                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4420                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4421                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4422                 SCTP_DECR_ASOC_COUNT();
4423                 *error = err;
4424                 return (NULL);
4425         }
4426         /* and the port */
4427         SCTP_INP_INFO_WLOCK();
4428         SCTP_INP_WLOCK(inp);
4429         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4430                 /* inpcb freed while alloc going on */
4431                 SCTP_TCB_LOCK_DESTROY(stcb);
4432                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4433                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4434                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4435                 SCTP_INP_WUNLOCK(inp);
4436                 SCTP_INP_INFO_WUNLOCK();
4437                 SCTP_DECR_ASOC_COUNT();
4438                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4439                 *error = EINVAL;
4440                 return (NULL);
4441         }
4442         SCTP_TCB_LOCK(stcb);
4443
4444         /* now that my_vtag is set, add it to the hash */
4445         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4446         /* put it in the bucket in the vtag hash of assoc's for the system */
4447         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4448         SCTP_INP_INFO_WUNLOCK();
4449
4450         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4451                 /* failure.. memory error? */
4452                 if (asoc->strmout) {
4453                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4454                         asoc->strmout = NULL;
4455                 }
4456                 if (asoc->mapping_array) {
4457                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4458                         asoc->mapping_array = NULL;
4459                 }
4460                 if (asoc->nr_mapping_array) {
4461                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4462                         asoc->nr_mapping_array = NULL;
4463                 }
4464                 SCTP_DECR_ASOC_COUNT();
4465                 SCTP_TCB_LOCK_DESTROY(stcb);
4466                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4467                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4468                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4469                 SCTP_INP_WUNLOCK(inp);
4470                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4471                 *error = ENOBUFS;
4472                 return (NULL);
4473         }
4474         /* Init all the timers */
4475         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4476         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4477         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4478         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4479         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4480         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4481         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4482
4483         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4484         /* now file the port under the hash as well */
4485         if (inp->sctp_tcbhash != NULL) {
4486                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4487                     inp->sctp_hashmark)];
4488                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4489         }
4490         SCTP_INP_WUNLOCK(inp);
4491         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4492         return (stcb);
4493 }
4494
4495
4496 void
4497 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4498 {
4499         struct sctp_association *asoc;
4500
4501         asoc = &stcb->asoc;
4502         asoc->numnets--;
4503         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4504         if (net == asoc->primary_destination) {
4505                 /* Reset primary */
4506                 struct sctp_nets *lnet;
4507
4508                 lnet = TAILQ_FIRST(&asoc->nets);
4509                 /*
4510                  * Mobility adaptation Ideally, if deleted destination is
4511                  * the primary, it becomes a fast retransmission trigger by
4512                  * the subsequent SET PRIMARY. (by micchie)
4513                  */
4514                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4515                     SCTP_MOBILITY_BASE) ||
4516                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4517                     SCTP_MOBILITY_FASTHANDOFF)) {
4518                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4519                         if (asoc->deleted_primary != NULL) {
4520                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4521                                 goto out;
4522                         }
4523                         asoc->deleted_primary = net;
4524                         atomic_add_int(&net->ref_count, 1);
4525                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4526                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4527                         sctp_mobility_feature_on(stcb->sctp_ep,
4528                             SCTP_MOBILITY_PRIM_DELETED);
4529                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4530                             stcb->sctp_ep, stcb, NULL);
4531                 }
4532 out:
4533                 /* Try to find a confirmed primary */
4534                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4535         }
4536         if (net == asoc->last_data_chunk_from) {
4537                 /* Reset primary */
4538                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4539         }
4540         if (net == asoc->last_control_chunk_from) {
4541                 /* Clear net */
4542                 asoc->last_control_chunk_from = NULL;
4543         }
4544         if (net == stcb->asoc.alternate) {
4545                 sctp_free_remote_addr(stcb->asoc.alternate);
4546                 stcb->asoc.alternate = NULL;
4547         }
4548         sctp_free_remote_addr(net);
4549 }
4550
4551 /*
4552  * remove a remote endpoint address from an association, it will fail if the
4553  * address does not exist.
4554  */
4555 int
4556 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4557 {
4558         /*
4559          * Here we need to remove a remote address. This is quite simple, we
4560          * first find it in the list of address for the association
4561          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4562          * on that item. Note we do not allow it to be removed if there are
4563          * no other addresses.
4564          */
4565         struct sctp_association *asoc;
4566         struct sctp_nets *net, *nnet;
4567
4568         asoc = &stcb->asoc;
4569
4570         /* locate the address */
4571         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4572                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4573                         continue;
4574                 }
4575                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4576                     remaddr)) {
4577                         /* we found the guy */
4578                         if (asoc->numnets < 2) {
4579                                 /* Must have at LEAST two remote addresses */
4580                                 return (-1);
4581                         } else {
4582                                 sctp_remove_net(stcb, net);
4583                                 return (0);
4584                         }
4585                 }
4586         }
4587         /* not found. */
4588         return (-2);
4589 }
4590
4591 void
4592 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4593 {
4594         struct sctpvtaghead *chain;
4595         struct sctp_tagblock *twait_block;
4596         int found = 0;
4597         int i;
4598
4599         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4600         if (!LIST_EMPTY(chain)) {
4601                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4602                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4603                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4604                                     (twait_block->vtag_block[i].lport == lport) &&
4605                                     (twait_block->vtag_block[i].rport == rport)) {
4606                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4607                                         twait_block->vtag_block[i].v_tag = 0;
4608                                         twait_block->vtag_block[i].lport = 0;
4609                                         twait_block->vtag_block[i].rport = 0;
4610                                         found = 1;
4611                                         break;
4612                                 }
4613                         }
4614                         if (found)
4615                                 break;
4616                 }
4617         }
4618 }
4619
4620 int
4621 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4622 {
4623         struct sctpvtaghead *chain;
4624         struct sctp_tagblock *twait_block;
4625         int found = 0;
4626         int i;
4627
4628         SCTP_INP_INFO_WLOCK();
4629         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4630         if (!LIST_EMPTY(chain)) {
4631                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4632                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4633                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4634                                     (twait_block->vtag_block[i].lport == lport) &&
4635                                     (twait_block->vtag_block[i].rport == rport)) {
4636                                         found = 1;
4637                                         break;
4638                                 }
4639                         }
4640                         if (found)
4641                                 break;
4642                 }
4643         }
4644         SCTP_INP_INFO_WUNLOCK();
4645         return (found);
4646 }
4647
4648
4649 void
4650 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4651 {
4652         struct sctpvtaghead *chain;
4653         struct sctp_tagblock *twait_block;
4654         struct timeval now;
4655         int set, i;
4656
4657         if (time == 0) {
4658                 /* Its disabled */
4659                 return;
4660         }
4661         (void)SCTP_GETTIME_TIMEVAL(&now);
4662         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4663         set = 0;
4664         if (!LIST_EMPTY(chain)) {
4665                 /* Block(s) present, lets find space, and expire on the fly */
4666                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4667                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4668                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4669                                     !set) {
4670                                         twait_block->vtag_block[i].tv_sec_at_expire =
4671                                             now.tv_sec + time;
4672                                         twait_block->vtag_block[i].v_tag = tag;
4673                                         twait_block->vtag_block[i].lport = lport;
4674                                         twait_block->vtag_block[i].rport = rport;
4675                                         set = 1;
4676                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4677                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4678                                         /* Audit expires this guy */
4679                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4680                                         twait_block->vtag_block[i].v_tag = 0;
4681                                         twait_block->vtag_block[i].lport = 0;
4682                                         twait_block->vtag_block[i].rport = 0;
4683                                         if (set == 0) {
4684                                                 /* Reuse it for my new tag */
4685                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4686                                                 twait_block->vtag_block[i].v_tag = tag;
4687                                                 twait_block->vtag_block[i].lport = lport;
4688                                                 twait_block->vtag_block[i].rport = rport;
4689                                                 set = 1;
4690                                         }
4691                                 }
4692                         }
4693                         if (set) {
4694                                 /*
4695                                  * We only do up to the block where we can
4696                                  * place our tag for audits
4697                                  */
4698                                 break;
4699                         }
4700                 }
4701         }
4702         /* Need to add a new block to chain */
4703         if (!set) {
4704                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4705                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4706                 if (twait_block == NULL) {
4707 #ifdef INVARIANTS
4708                         panic("Can not alloc tagblock");
4709 #endif
4710                         return;
4711                 }
4712                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4713                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4714                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4715                 twait_block->vtag_block[0].v_tag = tag;
4716                 twait_block->vtag_block[0].lport = lport;
4717                 twait_block->vtag_block[0].rport = rport;
4718         }
4719 }
4720
4721
4722
4723 /*-
4724  * Free the association after un-hashing the remote port. This
4725  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4726  * expect that the input to this function IS a locked TCB.
4727  * It will return 0, if it did NOT destroy the association (instead
4728  * it unlocks it. It will return NON-zero if it either destroyed the
4729  * association OR the association is already destroyed.
4730  */
4731 int
4732 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4733 {
4734         int i;
4735         struct sctp_association *asoc;
4736         struct sctp_nets *net, *nnet;
4737         struct sctp_laddr *laddr, *naddr;
4738         struct sctp_tmit_chunk *chk, *nchk;
4739         struct sctp_asconf_addr *aparam, *naparam;
4740         struct sctp_asconf_ack *aack, *naack;
4741         struct sctp_stream_reset_list *strrst, *nstrrst;
4742         struct sctp_queued_to_read *sq, *nsq;
4743         struct sctp_stream_queue_pending *sp, *nsp;
4744         sctp_sharedkey_t *shared_key, *nshared_key;
4745         struct socket *so;
4746
4747         /* first, lets purge the entry from the hash table. */
4748
4749 #ifdef SCTP_LOG_CLOSING
4750         sctp_log_closing(inp, stcb, 6);
4751 #endif
4752         if (stcb->asoc.state == 0) {
4753 #ifdef SCTP_LOG_CLOSING
4754                 sctp_log_closing(inp, NULL, 7);
4755 #endif
4756                 /* there is no asoc, really TSNH :-0 */
4757                 return (1);
4758         }
4759         if (stcb->asoc.alternate) {
4760                 sctp_free_remote_addr(stcb->asoc.alternate);
4761                 stcb->asoc.alternate = NULL;
4762         }
4763         /* TEMP CODE */
4764         if (stcb->freed_from_where == 0) {
4765                 /* Only record the first place free happened from */
4766                 stcb->freed_from_where = from_location;
4767         }
4768         /* TEMP CODE */
4769
4770         asoc = &stcb->asoc;
4771         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4772             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4773                 /* nothing around */
4774                 so = NULL;
4775         else
4776                 so = inp->sctp_socket;
4777
4778         /*
4779          * We used timer based freeing if a reader or writer is in the way.
4780          * So we first check if we are actually being called from a timer,
4781          * if so we abort early if a reader or writer is still in the way.
4782          */
4783         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4784             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4785                 /*
4786                  * is it the timer driving us? if so are the reader/writers
4787                  * gone?
4788                  */
4789                 if (stcb->asoc.refcnt) {
4790                         /* nope, reader or writer in the way */
4791                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4792                         /* no asoc destroyed */
4793                         SCTP_TCB_UNLOCK(stcb);
4794 #ifdef SCTP_LOG_CLOSING
4795                         sctp_log_closing(inp, stcb, 8);
4796 #endif
4797                         return (0);
4798                 }
4799         }
4800         /* now clean up any other timers */
4801         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4802         asoc->dack_timer.self = NULL;
4803         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4804         /*-
4805          * For stream reset we don't blast this unless
4806          * it is a str-reset timer, it might be the
4807          * free-asoc timer which we DON'T want to
4808          * disturb.
4809          */
4810         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4811                 asoc->strreset_timer.self = NULL;
4812         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4813         asoc->asconf_timer.self = NULL;
4814         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4815         asoc->autoclose_timer.self = NULL;
4816         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4817         asoc->shut_guard_timer.self = NULL;
4818         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4819         asoc->delayed_event_timer.self = NULL;
4820         /* Mobility adaptation */
4821         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4822         asoc->delete_prim_timer.self = NULL;
4823         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4824                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4825                 net->rxt_timer.self = NULL;
4826                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4827                 net->pmtu_timer.self = NULL;
4828                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4829                 net->hb_timer.self = NULL;
4830         }
4831         /* Now the read queue needs to be cleaned up (only once) */
4832         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4833                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4834                 SCTP_INP_READ_LOCK(inp);
4835                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4836                         if (sq->stcb == stcb) {
4837                                 sq->do_not_ref_stcb = 1;
4838                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4839                                 /*
4840                                  * If there is no end, there never will be
4841                                  * now.
4842                                  */
4843                                 if (sq->end_added == 0) {
4844                                         /* Held for PD-API clear that. */
4845                                         sq->pdapi_aborted = 1;
4846                                         sq->held_length = 0;
4847                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4848                                                 /*
4849                                                  * Need to add a PD-API
4850                                                  * aborted indication.
4851                                                  * Setting the control_pdapi
4852                                                  * assures that it will be
4853                                                  * added right after this
4854                                                  * msg.
4855                                                  */
4856                                                 uint32_t strseq;
4857
4858                                                 stcb->asoc.control_pdapi = sq;
4859                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4860                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4861                                                     stcb,
4862                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4863                                                     (void *)&strseq,
4864                                                     SCTP_SO_LOCKED);
4865                                                 stcb->asoc.control_pdapi = NULL;
4866                                         }
4867                                 }
4868                                 /* Add an end to wake them */
4869                                 sq->end_added = 1;
4870                         }
4871                 }
4872                 SCTP_INP_READ_UNLOCK(inp);
4873                 if (stcb->block_entry) {
4874                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4875                         stcb->block_entry->error = ECONNRESET;
4876                         stcb->block_entry = NULL;
4877                 }
4878         }
4879         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4880                 /*
4881                  * Someone holds a reference OR the socket is unaccepted
4882                  * yet.
4883                  */
4884                 if ((stcb->asoc.refcnt) ||
4885                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4886                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4887                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4888                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4889                 }
4890                 SCTP_TCB_UNLOCK(stcb);
4891                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4892                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4893                         /* nothing around */
4894                         so = NULL;
4895                 if (so) {
4896                         /* Wake any reader/writers */
4897                         sctp_sorwakeup(inp, so);
4898                         sctp_sowwakeup(inp, so);
4899                 }
4900 #ifdef SCTP_LOG_CLOSING
4901                 sctp_log_closing(inp, stcb, 9);
4902 #endif
4903                 /* no asoc destroyed */
4904                 return (0);
4905         }
4906 #ifdef SCTP_LOG_CLOSING
4907         sctp_log_closing(inp, stcb, 10);
4908 #endif
4909         /*
4910          * When I reach here, no others want to kill the assoc yet.. and I
4911          * own the lock. Now its possible an abort comes in when I do the
4912          * lock exchange below to grab all the locks to do the final take
4913          * out. to prevent this we increment the count, which will start a
4914          * timer and blow out above thus assuring us that we hold exclusive
4915          * killing of the asoc. Note that after getting back the TCB lock we
4916          * will go ahead and increment the counter back up and stop any
4917          * timer a passing stranger may have started :-S
4918          */
4919         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4920                 atomic_add_int(&stcb->asoc.refcnt, 1);
4921
4922                 SCTP_TCB_UNLOCK(stcb);
4923                 SCTP_INP_INFO_WLOCK();
4924                 SCTP_INP_WLOCK(inp);
4925                 SCTP_TCB_LOCK(stcb);
4926         }
4927         /* Double check the GONE flag */
4928         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4929             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4930                 /* nothing around */
4931                 so = NULL;
4932
4933         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4934             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4935                 /*
4936                  * For TCP type we need special handling when we are
4937                  * connected. We also include the peel'ed off ones to.
4938                  */
4939                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4940                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4941                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4942                         if (so) {
4943                                 SOCK_LOCK(so);
4944                                 if (so->so_rcv.sb_cc == 0) {
4945                                         so->so_state &= ~(SS_ISCONNECTING |
4946                                             SS_ISDISCONNECTING |
4947                                             SS_ISCONFIRMING |
4948                                             SS_ISCONNECTED);
4949                                 }
4950                                 socantrcvmore_locked(so);
4951                                 sctp_sowwakeup(inp, so);
4952                                 sctp_sorwakeup(inp, so);
4953                                 SCTP_SOWAKEUP(so);
4954                         }
4955                 }
4956         }
4957         /*
4958          * Make it invalid too, that way if its about to run it will abort
4959          * and return.
4960          */
4961         /* re-increment the lock */
4962         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4963                 atomic_add_int(&stcb->asoc.refcnt, -1);
4964         }
4965         if (stcb->asoc.refcnt) {
4966                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4967                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4968                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4969                         SCTP_INP_INFO_WUNLOCK();
4970                         SCTP_INP_WUNLOCK(inp);
4971                 }
4972                 SCTP_TCB_UNLOCK(stcb);
4973                 return (0);
4974         }
4975         asoc->state = 0;
4976         if (inp->sctp_tcbhash) {
4977                 LIST_REMOVE(stcb, sctp_tcbhash);
4978         }
4979         if (stcb->asoc.in_asocid_hash) {
4980                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4981         }
4982         /* Now lets remove it from the list of ALL associations in the EP */
4983         LIST_REMOVE(stcb, sctp_tcblist);
4984         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4985                 SCTP_INP_INCR_REF(inp);
4986                 SCTP_INP_WUNLOCK(inp);
4987         }
4988         /* pull from vtag hash */
4989         LIST_REMOVE(stcb, sctp_asocs);
4990         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4991             inp->sctp_lport, stcb->rport);
4992
4993         /*
4994          * Now restop the timers to be sure this is paranoia at is finest!
4995          */
4996         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4997         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4998         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4999         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5000         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5001         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5002         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5003         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5004                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5005                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5006                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5007         }
5008
5009         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
5010         /*
5011          * The chunk lists and such SHOULD be empty but we check them just
5012          * in case.
5013          */
5014         /* anything on the wheel needs to be removed */
5015         for (i = 0; i < asoc->streamoutcnt; i++) {
5016                 struct sctp_stream_out *outs;
5017
5018                 outs = &asoc->strmout[i];
5019                 /* now clean up any chunks here */
5020                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
5021                         TAILQ_REMOVE(&outs->outqueue, sp, next);
5022                         if (sp->data) {
5023                                 if (so) {
5024                                         /* Still an open socket - report */
5025                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5026                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
5027                                             (void *)sp, SCTP_SO_LOCKED);
5028                                 }
5029                                 if (sp->data) {
5030                                         sctp_m_freem(sp->data);
5031                                         sp->data = NULL;
5032                                         sp->tail_mbuf = NULL;
5033                                 }
5034                         }
5035                         if (sp->net) {
5036                                 sctp_free_remote_addr(sp->net);
5037                                 sp->net = NULL;
5038                         }
5039                         sctp_free_spbufspace(stcb, asoc, sp);
5040                         if (sp->holds_key_ref)
5041                                 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED);
5042                         /* Free the zone stuff  */
5043                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
5044                         SCTP_DECR_STRMOQ_COUNT();
5045                         /* sa_ignore FREED_MEMORY */
5046                 }
5047         }
5048         /* sa_ignore FREED_MEMORY */
5049         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5050                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5051                 SCTP_FREE(strrst, SCTP_M_STRESET);
5052         }
5053         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5054                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5055                 if (sq->data) {
5056                         sctp_m_freem(sq->data);
5057                         sq->data = NULL;
5058                 }
5059                 sctp_free_remote_addr(sq->whoFrom);
5060                 sq->whoFrom = NULL;
5061                 sq->stcb = NULL;
5062                 /* Free the ctl entry */
5063                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5064                 SCTP_DECR_READQ_COUNT();
5065                 /* sa_ignore FREED_MEMORY */
5066         }
5067         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5068                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5069                 if (chk->data) {
5070                         sctp_m_freem(chk->data);
5071                         chk->data = NULL;
5072                 }
5073                 if (chk->holds_key_ref)
5074                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5075                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5076                 SCTP_DECR_CHK_COUNT();
5077                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5078                 asoc->free_chunk_cnt--;
5079                 /* sa_ignore FREED_MEMORY */
5080         }
5081         /* pending send queue SHOULD be empty */
5082         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5083                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5084                 if (chk->data) {
5085                         if (so) {
5086                                 /* Still a socket? */
5087                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5088                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
5089                         }
5090                         if (chk->data) {
5091                                 sctp_m_freem(chk->data);
5092                                 chk->data = NULL;
5093                         }
5094                 }
5095                 if (chk->holds_key_ref)
5096                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5097                 if (chk->whoTo) {
5098                         sctp_free_remote_addr(chk->whoTo);
5099                         chk->whoTo = NULL;
5100                 }
5101                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5102                 SCTP_DECR_CHK_COUNT();
5103                 /* sa_ignore FREED_MEMORY */
5104         }
5105         /* sent queue SHOULD be empty */
5106         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5107                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5108                 if (chk->data) {
5109                         if (so) {
5110                                 /* Still a socket? */
5111                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5112                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
5113                         }
5114                         if (chk->data) {
5115                                 sctp_m_freem(chk->data);
5116                                 chk->data = NULL;
5117                         }
5118                 }
5119                 if (chk->holds_key_ref)
5120                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5121                 sctp_free_remote_addr(chk->whoTo);
5122                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5123                 SCTP_DECR_CHK_COUNT();
5124                 /* sa_ignore FREED_MEMORY */
5125         }
5126         /* control queue MAY not be empty */
5127         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5128                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5129                 if (chk->data) {
5130                         sctp_m_freem(chk->data);
5131                         chk->data = NULL;
5132                 }
5133                 if (chk->holds_key_ref)
5134                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5135                 sctp_free_remote_addr(chk->whoTo);
5136                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5137                 SCTP_DECR_CHK_COUNT();
5138                 /* sa_ignore FREED_MEMORY */
5139         }
5140         /* ASCONF queue MAY not be empty */
5141         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5142                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5143                 if (chk->data) {
5144                         sctp_m_freem(chk->data);
5145                         chk->data = NULL;
5146                 }
5147                 if (chk->holds_key_ref)
5148                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5149                 sctp_free_remote_addr(chk->whoTo);
5150                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5151                 SCTP_DECR_CHK_COUNT();
5152                 /* sa_ignore FREED_MEMORY */
5153         }
5154         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5155                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5156                 if (chk->data) {
5157                         sctp_m_freem(chk->data);
5158                         chk->data = NULL;
5159                 }
5160                 if (chk->holds_key_ref)
5161                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5162                 sctp_free_remote_addr(chk->whoTo);
5163                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5164                 SCTP_DECR_CHK_COUNT();
5165                 /* sa_ignore FREED_MEMORY */
5166         }
5167
5168         if (asoc->mapping_array) {
5169                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5170                 asoc->mapping_array = NULL;
5171         }
5172         if (asoc->nr_mapping_array) {
5173                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5174                 asoc->nr_mapping_array = NULL;
5175         }
5176         /* the stream outs */
5177         if (asoc->strmout) {
5178                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5179                 asoc->strmout = NULL;
5180         }
5181         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5182         if (asoc->strmin) {
5183                 struct sctp_queued_to_read *ctl, *nctl;
5184
5185                 for (i = 0; i < asoc->streamincnt; i++) {
5186                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5187                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5188                                 sctp_free_remote_addr(ctl->whoFrom);
5189                                 if (ctl->data) {
5190                                         sctp_m_freem(ctl->data);
5191                                         ctl->data = NULL;
5192                                 }
5193                                 /*
5194                                  * We don't free the address here since all
5195                                  * the net's were freed above.
5196                                  */
5197                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5198                                 SCTP_DECR_READQ_COUNT();
5199                         }
5200                 }
5201                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5202                 asoc->strmin = NULL;
5203         }
5204         asoc->streamincnt = 0;
5205         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5206 #ifdef INVARIANTS
5207                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5208                         panic("no net's left alloc'ed, or list points to itself");
5209                 }
5210 #endif
5211                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5212                 sctp_free_remote_addr(net);
5213         }
5214         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5215                 /* sa_ignore FREED_MEMORY */
5216                 sctp_remove_laddr(laddr);
5217         }
5218
5219         /* pending asconf (address) parameters */
5220         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5221                 /* sa_ignore FREED_MEMORY */
5222                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5223                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5224         }
5225         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5226                 /* sa_ignore FREED_MEMORY */
5227                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5228                 if (aack->data != NULL) {
5229                         sctp_m_freem(aack->data);
5230                 }
5231                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5232         }
5233         /* clean up auth stuff */
5234         if (asoc->local_hmacs)
5235                 sctp_free_hmaclist(asoc->local_hmacs);
5236         if (asoc->peer_hmacs)
5237                 sctp_free_hmaclist(asoc->peer_hmacs);
5238
5239         if (asoc->local_auth_chunks)
5240                 sctp_free_chunklist(asoc->local_auth_chunks);
5241         if (asoc->peer_auth_chunks)
5242                 sctp_free_chunklist(asoc->peer_auth_chunks);
5243
5244         sctp_free_authinfo(&asoc->authinfo);
5245
5246         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5247                 LIST_REMOVE(shared_key, next);
5248                 sctp_free_sharedkey(shared_key);
5249                 /* sa_ignore FREED_MEMORY */
5250         }
5251
5252         /* Insert new items here :> */
5253
5254         /* Get rid of LOCK */
5255         SCTP_TCB_LOCK_DESTROY(stcb);
5256         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5257         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5258                 SCTP_INP_INFO_WUNLOCK();
5259                 SCTP_INP_RLOCK(inp);
5260         }
5261 #ifdef SCTP_TRACK_FREED_ASOCS
5262         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5263                 /* now clean up the tasoc itself */
5264                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5265                 SCTP_DECR_ASOC_COUNT();
5266         } else {
5267                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5268         }
5269 #else
5270         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5271         SCTP_DECR_ASOC_COUNT();
5272 #endif
5273         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5274                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5275                         /*
5276                          * If its NOT the inp_free calling us AND sctp_close
5277                          * as been called, we call back...
5278                          */
5279                         SCTP_INP_RUNLOCK(inp);
5280                         /*
5281                          * This will start the kill timer (if we are the
5282                          * last one) since we hold an increment yet. But
5283                          * this is the only safe way to do this since
5284                          * otherwise if the socket closes at the same time
5285                          * we are here we might collide in the cleanup.
5286                          */
5287                         sctp_inpcb_free(inp,
5288                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5289                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5290                         SCTP_INP_DECR_REF(inp);
5291                         goto out_of;
5292                 } else {
5293                         /* The socket is still open. */
5294                         SCTP_INP_DECR_REF(inp);
5295                 }
5296         }
5297         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5298                 SCTP_INP_RUNLOCK(inp);
5299         }
5300 out_of:
5301         /* destroyed the asoc */
5302 #ifdef SCTP_LOG_CLOSING
5303         sctp_log_closing(inp, NULL, 11);
5304 #endif
5305         return (1);
5306 }
5307
5308
5309
5310 /*
5311  * determine if a destination is "reachable" based upon the addresses bound
5312  * to the current endpoint (e.g. only v4 or v6 currently bound)
5313  */
5314 /*
5315  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5316  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5317  * types bound as its endpoint
5318  */
5319 int
5320 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5321 {
5322         struct sctp_inpcb *inp;
5323         int answer;
5324
5325         /*
5326          * No locks here, the TCB, in all cases is already locked and an
5327          * assoc is up. There is either a INP lock by the caller applied (in
5328          * asconf case when deleting an address) or NOT in the HB case,
5329          * however if HB then the INP increment is up and the INP will not
5330          * be removed (on top of the fact that we have a TCB lock). So we
5331          * only want to read the sctp_flags, which is either bound-all or
5332          * not.. no protection needed since once an assoc is up you can't be
5333          * changing your binding.
5334          */
5335         inp = stcb->sctp_ep;
5336         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5337                 /* if bound all, destination is not restricted */
5338                 /*
5339                  * RRS: Question during lock work: Is this correct? If you
5340                  * are bound-all you still might need to obey the V4--V6
5341                  * flags??? IMO this bound-all stuff needs to be removed!
5342                  */
5343                 return (1);
5344         }
5345         /* NOTE: all "scope" checks are done when local addresses are added */
5346         switch (destaddr->sa_family) {
5347         case AF_INET6:
5348                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5349                 break;
5350         case AF_INET:
5351                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5352                 break;
5353         default:
5354                 /* invalid family, so it's unreachable */
5355                 answer = 0;
5356                 break;
5357         }
5358         return (answer);
5359 }
5360
5361 /*
5362  * update the inp_vflags on an endpoint
5363  */
5364 static void
5365 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5366 {
5367         struct sctp_laddr *laddr;
5368
5369         /* first clear the flag */
5370         inp->ip_inp.inp.inp_vflag = 0;
5371         /* set the flag based on addresses on the ep list */
5372         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5373                 if (laddr->ifa == NULL) {
5374                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5375                             __FUNCTION__);
5376                         continue;
5377                 }
5378                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5379                         continue;
5380                 }
5381                 switch (laddr->ifa->address.sa.sa_family) {
5382 #ifdef INET6
5383                 case AF_INET6:
5384                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5385                         break;
5386 #endif
5387 #ifdef INET
5388                 case AF_INET:
5389                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5390                         break;
5391 #endif
5392                 default:
5393                         break;
5394                 }
5395         }
5396 }
5397
5398 /*
5399  * Add the address to the endpoint local address list There is nothing to be
5400  * done if we are bound to all addresses
5401  */
5402 void
5403 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5404 {
5405         struct sctp_laddr *laddr;
5406         int fnd, error = 0;
5407
5408         fnd = 0;
5409
5410         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5411                 /* You are already bound to all. You have it already */
5412                 return;
5413         }
5414 #ifdef INET6
5415         if (ifa->address.sa.sa_family == AF_INET6) {
5416                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5417                         /* Can't bind a non-useable addr. */
5418                         return;
5419                 }
5420         }
5421 #endif
5422         /* first, is it already present? */
5423         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5424                 if (laddr->ifa == ifa) {
5425                         fnd = 1;
5426                         break;
5427                 }
5428         }
5429
5430         if (fnd == 0) {
5431                 /* Not in the ep list */
5432                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5433                 if (error != 0)
5434                         return;
5435                 inp->laddr_count++;
5436                 /* update inp_vflag flags */
5437                 switch (ifa->address.sa.sa_family) {
5438 #ifdef INET6
5439                 case AF_INET6:
5440                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5441                         break;
5442 #endif
5443 #ifdef INET6
5444                 case AF_INET:
5445                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5446                         break;
5447 #endif
5448                 default:
5449                         break;
5450                 }
5451         }
5452         return;
5453 }
5454
5455
5456 /*
5457  * select a new (hopefully reachable) destination net (should only be used
5458  * when we deleted an ep addr that is the only usable source address to reach
5459  * the destination net)
5460  */
5461 static void
5462 sctp_select_primary_destination(struct sctp_tcb *stcb)
5463 {
5464         struct sctp_nets *net;
5465
5466         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5467                 /* for now, we'll just pick the first reachable one we find */
5468                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5469                         continue;
5470                 if (sctp_destination_is_reachable(stcb,
5471                     (struct sockaddr *)&net->ro._l_addr)) {
5472                         /* found a reachable destination */
5473                         stcb->asoc.primary_destination = net;
5474                 }
5475         }
5476         /* I can't there from here! ...we're gonna die shortly... */
5477 }
5478
5479
5480 /*
5481  * Delete the address from the endpoint local address list There is nothing
5482  * to be done if we are bound to all addresses
5483  */
5484 void
5485 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5486 {
5487         struct sctp_laddr *laddr;
5488         int fnd;
5489
5490         fnd = 0;
5491         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5492                 /* You are already bound to all. You have it already */
5493                 return;
5494         }
5495         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5496                 if (laddr->ifa == ifa) {
5497                         fnd = 1;
5498                         break;
5499                 }
5500         }
5501         if (fnd && (inp->laddr_count < 2)) {
5502                 /* can't delete unless there are at LEAST 2 addresses */
5503                 return;
5504         }
5505         if (fnd) {
5506                 /*
5507                  * clean up any use of this address go through our
5508                  * associations and clear any last_used_address that match
5509                  * this one for each assoc, see if a new primary_destination
5510                  * is needed
5511                  */
5512                 struct sctp_tcb *stcb;
5513
5514                 /* clean up "next_addr_touse" */
5515                 if (inp->next_addr_touse == laddr)
5516                         /* delete this address */
5517                         inp->next_addr_touse = NULL;
5518
5519                 /* clean up "last_used_address" */
5520                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5521                         struct sctp_nets *net;
5522
5523                         SCTP_TCB_LOCK(stcb);
5524                         if (stcb->asoc.last_used_address == laddr)
5525                                 /* delete this address */
5526                                 stcb->asoc.last_used_address = NULL;
5527                         /*
5528                          * Now spin through all the nets and purge any ref
5529                          * to laddr
5530                          */
5531                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5532                                 if (net->ro._s_addr &&
5533                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5534                                         /* Yep, purge src address selected */
5535                                         sctp_rtentry_t *rt;
5536
5537                                         /* delete this address if cached */
5538                                         rt = net->ro.ro_rt;
5539                                         if (rt != NULL) {
5540                                                 RTFREE(rt);
5541                                                 net->ro.ro_rt = NULL;
5542                                         }
5543                                         sctp_free_ifa(net->ro._s_addr);
5544                                         net->ro._s_addr = NULL;
5545                                         net->src_addr_selected = 0;
5546                                 }
5547                         }
5548                         SCTP_TCB_UNLOCK(stcb);
5549                 }               /* for each tcb */
5550                 /* remove it from the ep list */
5551                 sctp_remove_laddr(laddr);
5552                 inp->laddr_count--;
5553                 /* update inp_vflag flags */
5554                 sctp_update_ep_vflag(inp);
5555         }
5556         return;
5557 }
5558
5559 /*
5560  * Add the address to the TCB local address restricted list.
5561  * This is a "pending" address list (eg. addresses waiting for an
5562  * ASCONF-ACK response) and cannot be used as a valid source address.
5563  */
5564 void
5565 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5566 {
5567         struct sctp_laddr *laddr;
5568         struct sctpladdr *list;
5569
5570         /*
5571          * Assumes TCB is locked.. and possibly the INP. May need to
5572          * confirm/fix that if we need it and is not the case.
5573          */
5574         list = &stcb->asoc.sctp_restricted_addrs;
5575
5576 #ifdef INET6
5577         if (ifa->address.sa.sa_family == AF_INET6) {
5578                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5579                         /* Can't bind a non-existent addr. */
5580                         return;
5581                 }
5582         }
5583 #endif
5584         /* does the address already exist? */
5585         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5586                 if (laddr->ifa == ifa) {
5587                         return;
5588                 }
5589         }
5590
5591         /* add to the list */
5592         (void)sctp_insert_laddr(list, ifa, 0);
5593         return;
5594 }
5595
5596 /*
5597  * insert an laddr entry with the given ifa for the desired list
5598  */
5599 int
5600 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5601 {
5602         struct sctp_laddr *laddr;
5603
5604         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5605         if (laddr == NULL) {
5606                 /* out of memory? */
5607                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5608                 return (EINVAL);
5609         }
5610         SCTP_INCR_LADDR_COUNT();
5611         bzero(laddr, sizeof(*laddr));
5612         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5613         laddr->ifa = ifa;
5614         laddr->action = act;
5615         atomic_add_int(&ifa->refcount, 1);
5616         /* insert it */
5617         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5618
5619         return (0);
5620 }
5621
5622 /*
5623  * Remove an laddr entry from the local address list (on an assoc)
5624  */
5625 void
5626 sctp_remove_laddr(struct sctp_laddr *laddr)
5627 {
5628
5629         /* remove from the list */
5630         LIST_REMOVE(laddr, sctp_nxt_addr);
5631         sctp_free_ifa(laddr->ifa);
5632         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5633         SCTP_DECR_LADDR_COUNT();
5634 }
5635
5636 /*
5637  * Remove a local address from the TCB local address restricted list
5638  */
5639 void
5640 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5641 {
5642         struct sctp_inpcb *inp;
5643         struct sctp_laddr *laddr;
5644
5645         /*
5646          * This is called by asconf work. It is assumed that a) The TCB is
5647          * locked and b) The INP is locked. This is true in as much as I can
5648          * trace through the entry asconf code where I did these locks.
5649          * Again, the ASCONF code is a bit different in that it does lock
5650          * the INP during its work often times. This must be since we don't
5651          * want other proc's looking up things while what they are looking
5652          * up is changing :-D
5653          */
5654
5655         inp = stcb->sctp_ep;
5656         /* if subset bound and don't allow ASCONF's, can't delete last */
5657         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5658             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5659                 if (stcb->sctp_ep->laddr_count < 2) {
5660                         /* can't delete last address */
5661                         return;
5662                 }
5663         }
5664         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5665                 /* remove the address if it exists */
5666                 if (laddr->ifa == NULL)
5667                         continue;
5668                 if (laddr->ifa == ifa) {
5669                         sctp_remove_laddr(laddr);
5670                         return;
5671                 }
5672         }
5673
5674         /* address not found! */
5675         return;
5676 }
5677
5678 /*
5679  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5680  */
5681 /* sysctl */
5682 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5683 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5684
5685
5686
5687 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5688 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5689 int *sctp_cpuarry = NULL;
5690 void
5691 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5692 {
5693         /* Queue a packet to a processor for the specified core */
5694         struct sctp_mcore_queue *qent;
5695         struct sctp_mcore_ctrl *wkq;
5696         int need_wake = 0;
5697
5698         if (sctp_mcore_workers == NULL) {
5699                 /* Something went way bad during setup */
5700                 sctp_input_with_port(m, off, 0);
5701                 return;
5702         }
5703         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5704             (sizeof(struct sctp_mcore_queue)),
5705             SCTP_M_MCORE);
5706         if (qent == NULL) {
5707                 /* This is trouble  */
5708                 sctp_input_with_port(m, off, 0);
5709                 return;
5710         }
5711         qent->vn = curvnet;
5712         qent->m = m;
5713         qent->off = off;
5714         qent->v6 = 0;
5715         wkq = &sctp_mcore_workers[cpu_to_use];
5716         SCTP_MCORE_QLOCK(wkq);
5717
5718         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5719         if (wkq->running == 0) {
5720                 need_wake = 1;
5721         }
5722         SCTP_MCORE_QUNLOCK(wkq);
5723         if (need_wake) {
5724                 wakeup(&wkq->running);
5725         }
5726 }
5727
5728 static void
5729 sctp_mcore_thread(void *arg)
5730 {
5731
5732         struct sctp_mcore_ctrl *wkq;
5733         struct sctp_mcore_queue *qent;
5734
5735         wkq = (struct sctp_mcore_ctrl *)arg;
5736         struct mbuf *m;
5737         int off, v6;
5738
5739         /* Wait for first tickle */
5740         SCTP_MCORE_LOCK(wkq);
5741         wkq->running = 0;
5742         msleep(&wkq->running,
5743             &wkq->core_mtx,
5744             0, "wait for pkt", 0);
5745         SCTP_MCORE_UNLOCK(wkq);
5746
5747         /* Bind to our cpu */
5748         thread_lock(curthread);
5749         sched_bind(curthread, wkq->cpuid);
5750         thread_unlock(curthread);
5751
5752         /* Now lets start working */
5753         SCTP_MCORE_LOCK(wkq);
5754         /* Now grab lock and go */
5755         for (;;) {
5756                 SCTP_MCORE_QLOCK(wkq);
5757 skip_sleep:
5758                 wkq->running = 1;
5759                 qent = TAILQ_FIRST(&wkq->que);
5760                 if (qent) {
5761                         TAILQ_REMOVE(&wkq->que, qent, next);
5762                         SCTP_MCORE_QUNLOCK(wkq);
5763                         CURVNET_SET(qent->vn);
5764                         m = qent->m;
5765                         off = qent->off;
5766                         v6 = qent->v6;
5767                         SCTP_FREE(qent, SCTP_M_MCORE);
5768                         if (v6 == 0) {
5769                                 sctp_input_with_port(m, off, 0);
5770                         } else {
5771                                 printf("V6 not yet supported\n");
5772                                 sctp_m_freem(m);
5773                         }
5774                         CURVNET_RESTORE();
5775                         SCTP_MCORE_QLOCK(wkq);
5776                 }
5777                 wkq->running = 0;
5778                 if (!TAILQ_EMPTY(&wkq->que)) {
5779                         goto skip_sleep;
5780                 }
5781                 SCTP_MCORE_QUNLOCK(wkq);
5782                 msleep(&wkq->running,
5783                     &wkq->core_mtx,
5784                     0, "wait for pkt", 0);
5785         }
5786 }
5787
5788 static void
5789 sctp_startup_mcore_threads(void)
5790 {
5791         int i, cpu;
5792
5793         if (mp_ncpus == 1)
5794                 return;
5795
5796         if (sctp_mcore_workers != NULL) {
5797                 /*
5798                  * Already been here in some previous vnet?
5799                  */
5800                 return;
5801         }
5802         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5803             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5804             SCTP_M_MCORE);
5805         if (sctp_mcore_workers == NULL) {
5806                 /* TSNH I hope */
5807                 return;
5808         }
5809         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5810             sizeof(struct sctp_mcore_ctrl)));
5811         /* Init the structures */
5812         for (i = 0; i <= mp_maxid; i++) {
5813                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5814                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5815                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5816                 sctp_mcore_workers[i].cpuid = i;
5817         }
5818         if (sctp_cpuarry == NULL) {
5819                 SCTP_MALLOC(sctp_cpuarry, int *,
5820                     (mp_ncpus * sizeof(int)),
5821                     SCTP_M_MCORE);
5822                 i = 0;
5823                 CPU_FOREACH(cpu) {
5824                         sctp_cpuarry[i] = cpu;
5825                         i++;
5826                 }
5827         }
5828         /* Now start them all */
5829         CPU_FOREACH(cpu) {
5830                 (void)kproc_create(sctp_mcore_thread,
5831                     (void *)&sctp_mcore_workers[cpu],
5832                     &sctp_mcore_workers[cpu].thread_proc,
5833                     RFPROC,
5834                     SCTP_KTHREAD_PAGES,
5835                     SCTP_MCORE_NAME);
5836
5837         }
5838 }
5839
5840 #endif
5841
5842 void
5843 sctp_pcb_init()
5844 {
5845         /*
5846          * SCTP initialization for the PCB structures should be called by
5847          * the sctp_init() funciton.
5848          */
5849         int i;
5850         struct timeval tv;
5851
5852         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5853                 /* error I was called twice */
5854                 return;
5855         }
5856         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5857
5858 #if defined(SCTP_LOCAL_TRACE_BUF)
5859         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5860 #endif
5861 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5862         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5863             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5864             SCTP_M_MCORE);
5865 #endif
5866         (void)SCTP_GETTIME_TIMEVAL(&tv);
5867 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5868         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5869         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5870         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5871 #else
5872         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5873         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5874         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5875 #endif
5876         /* init the empty list of (All) Endpoints */
5877         LIST_INIT(&SCTP_BASE_INFO(listhead));
5878
5879
5880         /* init the hash table of endpoints */
5881         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5882         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5883         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5884         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5885             &SCTP_BASE_INFO(hashasocmark));
5886         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5887             &SCTP_BASE_INFO(hashmark));
5888         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5889             &SCTP_BASE_INFO(hashtcpmark));
5890         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5891
5892
5893         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5894             &SCTP_BASE_INFO(hashvrfmark));
5895
5896         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5897             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5898         /* init the zones */
5899         /*
5900          * FIX ME: Should check for NULL returns, but if it does fail we are
5901          * doomed to panic anyways... add later maybe.
5902          */
5903         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5904             sizeof(struct sctp_inpcb), maxsockets);
5905
5906         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5907             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5908
5909         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5910             sizeof(struct sctp_laddr),
5911             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5912
5913         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5914             sizeof(struct sctp_nets),
5915             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5916
5917         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5918             sizeof(struct sctp_tmit_chunk),
5919             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5920
5921         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5922             sizeof(struct sctp_queued_to_read),
5923             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5924
5925         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5926             sizeof(struct sctp_stream_queue_pending),
5927             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5928
5929         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5930             sizeof(struct sctp_asconf),
5931             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5932
5933         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5934             sizeof(struct sctp_asconf_ack),
5935             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5936
5937
5938         /* Master Lock INIT for info structure */
5939         SCTP_INP_INFO_LOCK_INIT();
5940         SCTP_STATLOG_INIT_LOCK();
5941
5942         SCTP_IPI_COUNT_INIT();
5943         SCTP_IPI_ADDR_INIT();
5944 #ifdef SCTP_PACKET_LOGGING
5945         SCTP_IP_PKTLOG_INIT();
5946 #endif
5947         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5948
5949         SCTP_WQ_ADDR_INIT();
5950         /* not sure if we need all the counts */
5951         SCTP_BASE_INFO(ipi_count_ep) = 0;
5952         /* assoc/tcb zone info */
5953         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5954         /* local addrlist zone info */
5955         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5956         /* remote addrlist zone info */
5957         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5958         /* chunk info */
5959         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5960
5961         /* socket queue zone info */
5962         SCTP_BASE_INFO(ipi_count_readq) = 0;
5963
5964         /* stream out queue cont */
5965         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5966
5967         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5968         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5969
5970         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5971
5972         /* Init the TIMEWAIT list */
5973         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5974                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5975         }
5976
5977         sctp_startup_iterator();
5978
5979 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5980         sctp_startup_mcore_threads();
5981 #endif
5982
5983         /*
5984          * INIT the default VRF which for BSD is the only one, other O/S's
5985          * may have more. But initially they must start with one and then
5986          * add the VRF's as addresses are added.
5987          */
5988         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5989 }
5990
5991 /*
5992  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5993  */
5994 void
5995 sctp_pcb_finish(void)
5996 {
5997         struct sctp_vrflist *vrf_bucket;
5998         struct sctp_vrf *vrf, *nvrf;
5999         struct sctp_ifn *ifn, *nifn;
6000         struct sctp_ifa *ifa, *nifa;
6001         struct sctpvtaghead *chain;
6002         struct sctp_tagblock *twait_block, *prev_twait_block;
6003         struct sctp_laddr *wi, *nwi;
6004         int i;
6005
6006         /*
6007          * Free BSD the it thread never exits but we do clean up. The only
6008          * way freebsd reaches here if we have VRF's but we still add the
6009          * ifdef to make it compile on old versions.
6010          */
6011         {
6012                 struct sctp_iterator *it, *nit;
6013
6014                 SCTP_IPI_ITERATOR_WQ_LOCK();
6015                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
6016                         if (it->vn != curvnet) {
6017                                 continue;
6018                         }
6019                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6020                         if (it->function_atend != NULL) {
6021                                 (*it->function_atend) (it->pointer, it->val);
6022                         }
6023                         SCTP_FREE(it, SCTP_M_ITER);
6024                 }
6025                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6026                 SCTP_ITERATOR_LOCK();
6027                 if ((sctp_it_ctl.cur_it) &&
6028                     (sctp_it_ctl.cur_it->vn == curvnet)) {
6029                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
6030                 }
6031                 SCTP_ITERATOR_UNLOCK();
6032         }
6033
6034         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
6035         SCTP_WQ_ADDR_LOCK();
6036         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6037                 LIST_REMOVE(wi, sctp_nxt_addr);
6038                 SCTP_DECR_LADDR_COUNT();
6039                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6040         }
6041         SCTP_WQ_ADDR_UNLOCK();
6042
6043         /*
6044          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
6045          * destroyed first).
6046          */
6047         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6048         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6049                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6050                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6051                                 /* free the ifa */
6052                                 LIST_REMOVE(ifa, next_bucket);
6053                                 LIST_REMOVE(ifa, next_ifa);
6054                                 SCTP_FREE(ifa, SCTP_M_IFA);
6055                         }
6056                         /* free the ifn */
6057                         LIST_REMOVE(ifn, next_bucket);
6058                         LIST_REMOVE(ifn, next_ifn);
6059                         SCTP_FREE(ifn, SCTP_M_IFN);
6060                 }
6061                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6062                 /* free the vrf */
6063                 LIST_REMOVE(vrf, next_vrf);
6064                 SCTP_FREE(vrf, SCTP_M_VRF);
6065         }
6066         /* free the vrf hashes */
6067         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6068         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6069
6070         /*
6071          * free the TIMEWAIT list elements malloc'd in the function
6072          * sctp_add_vtag_to_timewait()...
6073          */
6074         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6075                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6076                 if (!LIST_EMPTY(chain)) {
6077                         prev_twait_block = NULL;
6078                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6079                                 if (prev_twait_block) {
6080                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6081                                 }
6082                                 prev_twait_block = twait_block;
6083                         }
6084                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6085                 }
6086         }
6087
6088         /* free the locks and mutexes */
6089 #ifdef SCTP_PACKET_LOGGING
6090         SCTP_IP_PKTLOG_DESTROY();
6091 #endif
6092         SCTP_IPI_ADDR_DESTROY();
6093         SCTP_STATLOG_DESTROY();
6094         SCTP_INP_INFO_LOCK_DESTROY();
6095
6096         SCTP_WQ_ADDR_DESTROY();
6097
6098         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6099         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6100         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6101         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6102         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6103         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6104         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6105         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6106         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6107         /* Get rid of other stuff to */
6108         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6109                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6110         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6111                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6112         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6113                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6114 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6115         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6116 #endif
6117 }
6118
6119
6120 int
6121 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6122     int offset, int limit, struct sctphdr *sh,
6123     struct sockaddr *altsa)
6124 {
6125         /*
6126          * grub through the INIT pulling addresses and loading them to the
6127          * nets structure in the asoc. The from address in the mbuf should
6128          * also be loaded (if it is not already). This routine can be called
6129          * with either INIT or INIT-ACK's as long as the m points to the IP
6130          * packet and the offset points to the beginning of the parameters.
6131          */
6132         struct sctp_inpcb *inp;
6133         struct sctp_nets *net, *nnet, *net_tmp;
6134         struct ip *iph;
6135         struct sctp_paramhdr *phdr, parm_buf;
6136         struct sctp_tcb *stcb_tmp;
6137         uint16_t ptype, plen;
6138         struct sockaddr *sa;
6139         struct sockaddr_storage dest_store;
6140         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
6141         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6142         struct sctp_auth_random *p_random = NULL;
6143         uint16_t random_len = 0;
6144         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6145         struct sctp_auth_hmac_algo *hmacs = NULL;
6146         uint16_t hmacs_len = 0;
6147         uint8_t saw_asconf = 0;
6148         uint8_t saw_asconf_ack = 0;
6149         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6150         struct sctp_auth_chunk_list *chunks = NULL;
6151         uint16_t num_chunks = 0;
6152         sctp_key_t *new_key;
6153         uint32_t keylen;
6154         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6155         uint8_t ecn_allowed;
6156
6157 #ifdef INET
6158         struct sockaddr_in sin;
6159
6160 #endif
6161 #ifdef INET6
6162         struct sockaddr_in6 sin6;
6163
6164 #endif
6165
6166         /* First get the destination address setup too. */
6167 #ifdef INET
6168         memset(&sin, 0, sizeof(sin));
6169         sin.sin_family = AF_INET;
6170         sin.sin_len = sizeof(sin);
6171         sin.sin_port = stcb->rport;
6172 #endif
6173 #ifdef INET6
6174         memset(&sin6, 0, sizeof(sin6));
6175         sin6.sin6_family = AF_INET6;
6176         sin6.sin6_len = sizeof(struct sockaddr_in6);
6177         sin6.sin6_port = stcb->rport;
6178 #endif
6179         iph = mtod(m, struct ip *);
6180         switch (iph->ip_v) {
6181 #ifdef INET
6182         case IPVERSION:
6183                 {
6184                         /* its IPv4 */
6185                         struct sockaddr_in *sin_2;
6186
6187                         sin_2 = (struct sockaddr_in *)(local_sa);
6188                         memset(sin_2, 0, sizeof(sin));
6189                         sin_2->sin_family = AF_INET;
6190                         sin_2->sin_len = sizeof(sin);
6191                         sin_2->sin_port = sh->dest_port;
6192                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
6193                         if (altsa) {
6194                                 /*
6195                                  * For cookies we use the src address NOT
6196                                  * from the packet but from the original
6197                                  * INIT.
6198                                  */
6199                                 sa = altsa;
6200                         } else {
6201                                 sin.sin_addr = iph->ip_src;
6202                                 sa = (struct sockaddr *)&sin;
6203                         }
6204                         break;
6205                 }
6206 #endif
6207 #ifdef INET6
6208         case IPV6_VERSION >> 4:
6209                 {
6210                         /* its IPv6 */
6211                         struct ip6_hdr *ip6;
6212                         struct sockaddr_in6 *sin6_2;
6213
6214                         ip6 = mtod(m, struct ip6_hdr *);
6215                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
6216                         memset(sin6_2, 0, sizeof(sin6));
6217                         sin6_2->sin6_family = AF_INET6;
6218                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
6219                         sin6_2->sin6_port = sh->dest_port;
6220                         sin6_2->sin6_addr = ip6->ip6_dst;
6221                         if (altsa) {
6222                                 /*
6223                                  * For cookies we use the src address NOT
6224                                  * from the packet but from the original
6225                                  * INIT.
6226                                  */
6227                                 sa = altsa;
6228                         } else {
6229                                 sin6.sin6_addr = ip6->ip6_src;
6230                                 sa = (struct sockaddr *)&sin6;
6231                         }
6232                         break;
6233                 }
6234 #endif
6235         default:
6236                 return (-1);
6237                 break;
6238         }
6239         /* Turn off ECN until we get through all params */
6240         ecn_allowed = 0;
6241         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6242                 /* mark all addresses that we have currently on the list */
6243                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6244         }
6245         /* does the source address already exist? if so skip it */
6246         inp = stcb->sctp_ep;
6247         atomic_add_int(&stcb->asoc.refcnt, 1);
6248         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
6249         atomic_add_int(&stcb->asoc.refcnt, -1);
6250
6251         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6252                 /* we must add the source address */
6253                 /* no scope set here since we have a tcb already. */
6254                 switch (sa->sa_family) {
6255 #ifdef INET
6256                 case AF_INET:
6257                         if (stcb->asoc.ipv4_addr_legal) {
6258                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6259                                         return (-1);
6260                                 }
6261                         }
6262                         break;
6263 #endif
6264 #ifdef INET6
6265                 case AF_INET6:
6266                         if (stcb->asoc.ipv6_addr_legal) {
6267                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6268                                         return (-2);
6269                                 }
6270                         }
6271                         break;
6272 #endif
6273                 default:
6274                         break;
6275                 }
6276         } else {
6277                 if (net_tmp != NULL && stcb_tmp == stcb) {
6278                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6279                 } else if (stcb_tmp != stcb) {
6280                         /* It belongs to another association? */
6281                         if (stcb_tmp)
6282                                 SCTP_TCB_UNLOCK(stcb_tmp);
6283                         return (-3);
6284                 }
6285         }
6286         if (stcb->asoc.state == 0) {
6287                 /* the assoc was freed? */
6288                 return (-4);
6289         }
6290         /*
6291          * peer must explicitly turn this on. This may have been initialized
6292          * to be "on" in order to allow local addr changes while INIT's are
6293          * in flight.
6294          */
6295         stcb->asoc.peer_supports_asconf = 0;
6296         /* now we must go through each of the params. */
6297         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6298         while (phdr) {
6299                 ptype = ntohs(phdr->param_type);
6300                 plen = ntohs(phdr->param_length);
6301                 /*
6302                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
6303                  * (int)plen);
6304                  */
6305                 if (offset + plen > limit) {
6306                         break;
6307                 }
6308                 if (plen == 0) {
6309                         break;
6310                 }
6311 #ifdef INET
6312                 if (ptype == SCTP_IPV4_ADDRESS) {
6313                         if (stcb->asoc.ipv4_addr_legal) {
6314                                 struct sctp_ipv4addr_param *p4, p4_buf;
6315
6316                                 /* ok get the v4 address and check/add */
6317                                 phdr = sctp_get_next_param(m, offset,
6318                                     (struct sctp_paramhdr *)&p4_buf,
6319                                     sizeof(p4_buf));
6320                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6321                                     phdr == NULL) {
6322                                         return (-5);
6323                                 }
6324                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6325                                 sin.sin_addr.s_addr = p4->addr;
6326                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6327                                         /* Skip multi-cast addresses */
6328                                         goto next_param;
6329                                 }
6330                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6331                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6332                                         goto next_param;
6333                                 }
6334                                 sa = (struct sockaddr *)&sin;
6335                                 inp = stcb->sctp_ep;
6336                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6337                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6338                                     local_sa, stcb);
6339                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6340
6341                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6342                                     inp == NULL) {
6343                                         /* we must add the source address */
6344                                         /*
6345                                          * no scope set since we have a tcb
6346                                          * already
6347                                          */
6348
6349                                         /*
6350                                          * we must validate the state again
6351                                          * here
6352                                          */
6353                         add_it_now:
6354                                         if (stcb->asoc.state == 0) {
6355                                                 /* the assoc was freed? */
6356                                                 return (-7);
6357                                         }
6358                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6359                                                 return (-8);
6360                                         }
6361                                 } else if (stcb_tmp == stcb) {
6362                                         if (stcb->asoc.state == 0) {
6363                                                 /* the assoc was freed? */
6364                                                 return (-10);
6365                                         }
6366                                         if (net != NULL) {
6367                                                 /* clear flag */
6368                                                 net->dest_state &=
6369                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6370                                         }
6371                                 } else {
6372                                         /*
6373                                          * strange, address is in another
6374                                          * assoc? straighten out locks.
6375                                          */
6376                                         if (stcb_tmp) {
6377                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6378                                                         /*
6379                                                          * in setup state we
6380                                                          * abort this guy
6381                                                          */
6382                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6383                                                             stcb_tmp, 1, NULL, 0);
6384                                                         goto add_it_now;
6385                                                 }
6386                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6387                                         }
6388                                         if (stcb->asoc.state == 0) {
6389                                                 /* the assoc was freed? */
6390                                                 return (-12);
6391                                         }
6392                                         return (-13);
6393                                 }
6394                         }
6395                 } else
6396 #endif
6397 #ifdef INET6
6398                 if (ptype == SCTP_IPV6_ADDRESS) {
6399                         if (stcb->asoc.ipv6_addr_legal) {
6400                                 /* ok get the v6 address and check/add */
6401                                 struct sctp_ipv6addr_param *p6, p6_buf;
6402
6403                                 phdr = sctp_get_next_param(m, offset,
6404                                     (struct sctp_paramhdr *)&p6_buf,
6405                                     sizeof(p6_buf));
6406                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6407                                     phdr == NULL) {
6408                                         return (-14);
6409                                 }
6410                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6411                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6412                                     sizeof(p6->addr));
6413                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6414                                         /* Skip multi-cast addresses */
6415                                         goto next_param;
6416                                 }
6417                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6418                                         /*
6419                                          * Link local make no sense without
6420                                          * scope
6421                                          */
6422                                         goto next_param;
6423                                 }
6424                                 sa = (struct sockaddr *)&sin6;
6425                                 inp = stcb->sctp_ep;
6426                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6427                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6428                                     local_sa, stcb);
6429                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6430                                 if (stcb_tmp == NULL &&
6431                                     (inp == stcb->sctp_ep || inp == NULL)) {
6432                                         /*
6433                                          * we must validate the state again
6434                                          * here
6435                                          */
6436                         add_it_now6:
6437                                         if (stcb->asoc.state == 0) {
6438                                                 /* the assoc was freed? */
6439                                                 return (-16);
6440                                         }
6441                                         /*
6442                                          * we must add the address, no scope
6443                                          * set
6444                                          */
6445                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6446                                                 return (-17);
6447                                         }
6448                                 } else if (stcb_tmp == stcb) {
6449                                         /*
6450                                          * we must validate the state again
6451                                          * here
6452                                          */
6453                                         if (stcb->asoc.state == 0) {
6454                                                 /* the assoc was freed? */
6455                                                 return (-19);
6456                                         }
6457                                         if (net != NULL) {
6458                                                 /* clear flag */
6459                                                 net->dest_state &=
6460                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6461                                         }
6462                                 } else {
6463                                         /*
6464                                          * strange, address is in another
6465                                          * assoc? straighten out locks.
6466                                          */
6467                                         if (stcb_tmp)
6468                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6469                                                         /*
6470                                                          * in setup state we
6471                                                          * abort this guy
6472                                                          */
6473                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6474                                                             stcb_tmp, 1, NULL, 0);
6475                                                         goto add_it_now6;
6476                                                 }
6477                                         SCTP_TCB_UNLOCK(stcb_tmp);
6478
6479                                         if (stcb->asoc.state == 0) {
6480                                                 /* the assoc was freed? */
6481                                                 return (-21);
6482                                         }
6483                                         return (-22);
6484                                 }
6485                         }
6486                 } else
6487 #endif
6488                 if (ptype == SCTP_ECN_CAPABLE) {
6489                         ecn_allowed = 1;
6490                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6491                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6492                                 struct sctp_adaptation_layer_indication ai,
6493                                                                 *aip;
6494
6495                                 phdr = sctp_get_next_param(m, offset,
6496                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6497                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6498                                 if (aip) {
6499                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6500                                         stcb->asoc.adaptation_needed = 1;
6501                                 }
6502                         }
6503                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6504                         struct sctp_asconf_addr_param lstore, *fee;
6505                         int lptype;
6506                         struct sockaddr *lsa = NULL;
6507
6508 #ifdef INET
6509                         struct sctp_asconf_addrv4_param *fii;
6510
6511 #endif
6512
6513                         stcb->asoc.peer_supports_asconf = 1;
6514                         if (plen > sizeof(lstore)) {
6515                                 return (-23);
6516                         }
6517                         phdr = sctp_get_next_param(m, offset,
6518                             (struct sctp_paramhdr *)&lstore,
6519                             min(plen, sizeof(lstore)));
6520                         if (phdr == NULL) {
6521                                 return (-24);
6522                         }
6523                         fee = (struct sctp_asconf_addr_param *)phdr;
6524                         lptype = ntohs(fee->addrp.ph.param_type);
6525                         switch (lptype) {
6526 #ifdef INET
6527                         case SCTP_IPV4_ADDRESS:
6528                                 if (plen !=
6529                                     sizeof(struct sctp_asconf_addrv4_param)) {
6530                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6531                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6532                                             plen);
6533                                 } else {
6534                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6535                                         sin.sin_addr.s_addr = fii->addrp.addr;
6536                                         lsa = (struct sockaddr *)&sin;
6537                                 }
6538                                 break;
6539 #endif
6540 #ifdef INET6
6541                         case SCTP_IPV6_ADDRESS:
6542                                 if (plen !=
6543                                     sizeof(struct sctp_asconf_addr_param)) {
6544                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6545                                             (int)sizeof(struct sctp_asconf_addr_param),
6546                                             plen);
6547                                 } else {
6548                                         memcpy(sin6.sin6_addr.s6_addr,
6549                                             fee->addrp.addr,
6550                                             sizeof(fee->addrp.addr));
6551                                         lsa = (struct sockaddr *)&sin6;
6552                                 }
6553                                 break;
6554 #endif
6555                         default:
6556                                 break;
6557                         }
6558                         if (lsa) {
6559                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6560                         }
6561                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6562                         stcb->asoc.peer_supports_nat = 1;
6563                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6564                         /* Peer supports pr-sctp */
6565                         stcb->asoc.peer_supports_prsctp = 1;
6566                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6567                         /* A supported extension chunk */
6568                         struct sctp_supported_chunk_types_param *pr_supported;
6569                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6570                         int num_ent, i;
6571
6572                         phdr = sctp_get_next_param(m, offset,
6573                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6574                         if (phdr == NULL) {
6575                                 return (-25);
6576                         }
6577                         stcb->asoc.peer_supports_asconf = 0;
6578                         stcb->asoc.peer_supports_prsctp = 0;
6579                         stcb->asoc.peer_supports_pktdrop = 0;
6580                         stcb->asoc.peer_supports_strreset = 0;
6581                         stcb->asoc.peer_supports_nr_sack = 0;
6582                         stcb->asoc.peer_supports_auth = 0;
6583                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6584                         num_ent = plen - sizeof(struct sctp_paramhdr);
6585                         for (i = 0; i < num_ent; i++) {
6586                                 switch (pr_supported->chunk_types[i]) {
6587                                 case SCTP_ASCONF:
6588                                 case SCTP_ASCONF_ACK:
6589                                         stcb->asoc.peer_supports_asconf = 1;
6590                                         break;
6591                                 case SCTP_FORWARD_CUM_TSN:
6592                                         stcb->asoc.peer_supports_prsctp = 1;
6593                                         break;
6594                                 case SCTP_PACKET_DROPPED:
6595                                         stcb->asoc.peer_supports_pktdrop = 1;
6596                                         break;
6597                                 case SCTP_NR_SELECTIVE_ACK:
6598                                         stcb->asoc.peer_supports_nr_sack = 1;
6599                                         break;
6600                                 case SCTP_STREAM_RESET:
6601                                         stcb->asoc.peer_supports_strreset = 1;
6602                                         break;
6603                                 case SCTP_AUTHENTICATION:
6604                                         stcb->asoc.peer_supports_auth = 1;
6605                                         break;
6606                                 default:
6607                                         /* one I have not learned yet */
6608                                         break;
6609
6610                                 }
6611                         }
6612                 } else if (ptype == SCTP_RANDOM) {
6613                         if (plen > sizeof(random_store))
6614                                 break;
6615                         if (got_random) {
6616                                 /* already processed a RANDOM */
6617                                 goto next_param;
6618                         }
6619                         phdr = sctp_get_next_param(m, offset,
6620                             (struct sctp_paramhdr *)random_store,
6621                             min(sizeof(random_store), plen));
6622                         if (phdr == NULL)
6623                                 return (-26);
6624                         p_random = (struct sctp_auth_random *)phdr;
6625                         random_len = plen - sizeof(*p_random);
6626                         /* enforce the random length */
6627                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6628                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6629                                 return (-27);
6630                         }
6631                         got_random = 1;
6632                 } else if (ptype == SCTP_HMAC_LIST) {
6633                         int num_hmacs;
6634                         int i;
6635
6636                         if (plen > sizeof(hmacs_store))
6637                                 break;
6638                         if (got_hmacs) {
6639                                 /* already processed a HMAC list */
6640                                 goto next_param;
6641                         }
6642                         phdr = sctp_get_next_param(m, offset,
6643                             (struct sctp_paramhdr *)hmacs_store,
6644                             min(plen, sizeof(hmacs_store)));
6645                         if (phdr == NULL)
6646                                 return (-28);
6647                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6648                         hmacs_len = plen - sizeof(*hmacs);
6649                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6650                         /* validate the hmac list */
6651                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6652                                 return (-29);
6653                         }
6654                         if (stcb->asoc.peer_hmacs != NULL)
6655                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6656                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6657                         if (stcb->asoc.peer_hmacs != NULL) {
6658                                 for (i = 0; i < num_hmacs; i++) {
6659                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6660                                             ntohs(hmacs->hmac_ids[i]));
6661                                 }
6662                         }
6663                         got_hmacs = 1;
6664                 } else if (ptype == SCTP_CHUNK_LIST) {
6665                         int i;
6666
6667                         if (plen > sizeof(chunks_store))
6668                                 break;
6669                         if (got_chklist) {
6670                                 /* already processed a Chunks list */
6671                                 goto next_param;
6672                         }
6673                         phdr = sctp_get_next_param(m, offset,
6674                             (struct sctp_paramhdr *)chunks_store,
6675                             min(plen, sizeof(chunks_store)));
6676                         if (phdr == NULL)
6677                                 return (-30);
6678                         chunks = (struct sctp_auth_chunk_list *)phdr;
6679                         num_chunks = plen - sizeof(*chunks);
6680                         if (stcb->asoc.peer_auth_chunks != NULL)
6681                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6682                         else
6683                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6684                         for (i = 0; i < num_chunks; i++) {
6685                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6686                                     stcb->asoc.peer_auth_chunks);
6687                                 /* record asconf/asconf-ack if listed */
6688                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6689                                         saw_asconf = 1;
6690                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6691                                         saw_asconf_ack = 1;
6692
6693                         }
6694                         got_chklist = 1;
6695                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6696                             (ptype == SCTP_STATE_COOKIE) ||
6697                             (ptype == SCTP_UNRECOG_PARAM) ||
6698                             (ptype == SCTP_COOKIE_PRESERVE) ||
6699                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6700                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6701                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6702                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6703                     (ptype == SCTP_SUCCESS_REPORT)) {
6704                          /* don't care */ ;
6705                 } else {
6706                         if ((ptype & 0x8000) == 0x0000) {
6707                                 /*
6708                                  * must stop processing the rest of the
6709                                  * param's. Any report bits were handled
6710                                  * with the call to
6711                                  * sctp_arethere_unrecognized_parameters()
6712                                  * when the INIT or INIT-ACK was first seen.
6713                                  */
6714                                 break;
6715                         }
6716                 }
6717
6718 next_param:
6719                 offset += SCTP_SIZE32(plen);
6720                 if (offset >= limit) {
6721                         break;
6722                 }
6723                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6724                     sizeof(parm_buf));
6725         }
6726         /* Now check to see if we need to purge any addresses */
6727         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6728                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6729                     SCTP_ADDR_NOT_IN_ASSOC) {
6730                         /* This address has been removed from the asoc */
6731                         /* remove and free it */
6732                         stcb->asoc.numnets--;
6733                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6734                         sctp_free_remote_addr(net);
6735                         if (net == stcb->asoc.primary_destination) {
6736                                 stcb->asoc.primary_destination = NULL;
6737                                 sctp_select_primary_destination(stcb);
6738                         }
6739                 }
6740         }
6741         if (ecn_allowed == 0) {
6742                 stcb->asoc.ecn_allowed = 0;
6743         }
6744         /* validate authentication required parameters */
6745         if (got_random && got_hmacs) {
6746                 stcb->asoc.peer_supports_auth = 1;
6747         } else {
6748                 stcb->asoc.peer_supports_auth = 0;
6749         }
6750         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6751                 /* peer does not support auth but sent a chunks list? */
6752                 return (-31);
6753         }
6754         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6755             !stcb->asoc.peer_supports_auth) {
6756                 /* peer supports asconf but not auth? */
6757                 return (-32);
6758         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6759             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6760                 return (-33);
6761         }
6762         /* concatenate the full random key */
6763         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6764         if (chunks != NULL) {
6765                 keylen += sizeof(*chunks) + num_chunks;
6766         }
6767         new_key = sctp_alloc_key(keylen);
6768         if (new_key != NULL) {
6769                 /* copy in the RANDOM */
6770                 if (p_random != NULL) {
6771                         keylen = sizeof(*p_random) + random_len;
6772                         bcopy(p_random, new_key->key, keylen);
6773                 }
6774                 /* append in the AUTH chunks */
6775                 if (chunks != NULL) {
6776                         bcopy(chunks, new_key->key + keylen,
6777                             sizeof(*chunks) + num_chunks);
6778                         keylen += sizeof(*chunks) + num_chunks;
6779                 }
6780                 /* append in the HMACs */
6781                 if (hmacs != NULL) {
6782                         bcopy(hmacs, new_key->key + keylen,
6783                             sizeof(*hmacs) + hmacs_len);
6784                 }
6785         } else {
6786                 /* failed to get memory for the key */
6787                 return (-34);
6788         }
6789         if (stcb->asoc.authinfo.peer_random != NULL)
6790                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6791         stcb->asoc.authinfo.peer_random = new_key;
6792         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6793         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6794
6795         return (0);
6796 }
6797
6798 int
6799 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6800     struct sctp_nets *net)
6801 {
6802         /* make sure the requested primary address exists in the assoc */
6803         if (net == NULL && sa)
6804                 net = sctp_findnet(stcb, sa);
6805
6806         if (net == NULL) {
6807                 /* didn't find the requested primary address! */
6808                 return (-1);
6809         } else {
6810                 /* set the primary address */
6811                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6812                         /* Must be confirmed, so queue to set */
6813                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6814                         return (0);
6815                 }
6816                 stcb->asoc.primary_destination = net;
6817                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6818                         sctp_free_remote_addr(stcb->asoc.alternate);
6819                         stcb->asoc.alternate = NULL;
6820                 }
6821                 net = TAILQ_FIRST(&stcb->asoc.nets);
6822                 if (net != stcb->asoc.primary_destination) {
6823                         /*
6824                          * first one on the list is NOT the primary
6825                          * sctp_cmpaddr() is much more efficient if the
6826                          * primary is the first on the list, make it so.
6827                          */
6828                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6829                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6830                 }
6831                 return (0);
6832         }
6833 }
6834
6835 int
6836 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6837 {
6838         /*
6839          * This function serves two purposes. It will see if a TAG can be
6840          * re-used and return 1 for yes it is ok and 0 for don't use that
6841          * tag. A secondary function it will do is purge out old tags that
6842          * can be removed.
6843          */
6844         struct sctpvtaghead *chain;
6845         struct sctp_tagblock *twait_block;
6846         struct sctpasochead *head;
6847         struct sctp_tcb *stcb;
6848         int i;
6849
6850         SCTP_INP_INFO_RLOCK();
6851         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6852             SCTP_BASE_INFO(hashasocmark))];
6853         if (head == NULL) {
6854                 /* invalid vtag */
6855                 goto skip_vtag_check;
6856         }
6857         LIST_FOREACH(stcb, head, sctp_asocs) {
6858                 /*
6859                  * We choose not to lock anything here. TCB's can't be
6860                  * removed since we have the read lock, so they can't be
6861                  * freed on us, same thing for the INP. I may be wrong with
6862                  * this assumption, but we will go with it for now :-)
6863                  */
6864                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6865                         continue;
6866                 }
6867                 if (stcb->asoc.my_vtag == tag) {
6868                         /* candidate */
6869                         if (stcb->rport != rport) {
6870                                 continue;
6871                         }
6872                         if (stcb->sctp_ep->sctp_lport != lport) {
6873                                 continue;
6874                         }
6875                         /* Its a used tag set */
6876                         SCTP_INP_INFO_RUNLOCK();
6877                         return (0);
6878                 }
6879         }
6880 skip_vtag_check:
6881
6882         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6883         /* Now what about timed wait ? */
6884         if (!LIST_EMPTY(chain)) {
6885                 /*
6886                  * Block(s) are present, lets see if we have this tag in the
6887                  * list
6888                  */
6889                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6890                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6891                                 if (twait_block->vtag_block[i].v_tag == 0) {
6892                                         /* not used */
6893                                         continue;
6894                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6895                                     now->tv_sec) {
6896                                         /* Audit expires this guy */
6897                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6898                                         twait_block->vtag_block[i].v_tag = 0;
6899                                         twait_block->vtag_block[i].lport = 0;
6900                                         twait_block->vtag_block[i].rport = 0;
6901                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6902                                             (twait_block->vtag_block[i].lport == lport) &&
6903                                     (twait_block->vtag_block[i].rport == rport)) {
6904                                         /* Bad tag, sorry :< */
6905                                         SCTP_INP_INFO_RUNLOCK();
6906                                         return (0);
6907                                 }
6908                         }
6909                 }
6910         }
6911         SCTP_INP_INFO_RUNLOCK();
6912         return (1);
6913 }
6914
6915 static void
6916 sctp_drain_mbufs(struct sctp_tcb *stcb)
6917 {
6918         /*
6919          * We must hunt this association for MBUF's past the cumack (i.e.
6920          * out of order data that we can renege on).
6921          */
6922         struct sctp_association *asoc;
6923         struct sctp_tmit_chunk *chk, *nchk;
6924         uint32_t cumulative_tsn_p1;
6925         struct sctp_queued_to_read *ctl, *nctl;
6926         int cnt, strmat;
6927         uint32_t gap, i;
6928         int fnd = 0;
6929
6930         /* We look for anything larger than the cum-ack + 1 */
6931
6932         asoc = &stcb->asoc;
6933         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6934                 /* none we can reneg on. */
6935                 return;
6936         }
6937         SCTP_STAT_INCR(sctps_protocol_drains_done);
6938         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6939         cnt = 0;
6940         /* First look in the re-assembly queue */
6941         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6942                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6943                         /* Yep it is above cum-ack */
6944                         cnt++;
6945                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6946                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6947                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6948                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6949                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6950                         if (chk->data) {
6951                                 sctp_m_freem(chk->data);
6952                                 chk->data = NULL;
6953                         }
6954                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6955                 }
6956         }
6957         /* Ok that was fun, now we will drain all the inbound streams? */
6958         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6959                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6960                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6961                                 /* Yep it is above cum-ack */
6962                                 cnt++;
6963                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6964                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6965                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6966                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6967                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6968                                 if (ctl->data) {
6969                                         sctp_m_freem(ctl->data);
6970                                         ctl->data = NULL;
6971                                 }
6972                                 sctp_free_remote_addr(ctl->whoFrom);
6973                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6974                                 SCTP_DECR_READQ_COUNT();
6975                         }
6976                 }
6977         }
6978         if (cnt) {
6979                 /* We must back down to see what the new highest is */
6980                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6981                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6982                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6983                                 asoc->highest_tsn_inside_map = i;
6984                                 fnd = 1;
6985                                 break;
6986                         }
6987                 }
6988                 if (!fnd) {
6989                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6990                 }
6991                 /*
6992                  * Question, should we go through the delivery queue? The
6993                  * only reason things are on here is the app not reading OR
6994                  * a p-d-api up. An attacker COULD send enough in to
6995                  * initiate the PD-API and then send a bunch of stuff to
6996                  * other streams... these would wind up on the delivery
6997                  * queue.. and then we would not get to them. But in order
6998                  * to do this I then have to back-track and un-deliver
6999                  * sequence numbers in streams.. el-yucko. I think for now
7000                  * we will NOT look at the delivery queue and leave it to be
7001                  * something to consider later. An alternative would be to
7002                  * abort the P-D-API with a notification and then deliver
7003                  * the data.... Or another method might be to keep track of
7004                  * how many times the situation occurs and if we see a
7005                  * possible attack underway just abort the association.
7006                  */
7007 #ifdef SCTP_DEBUG
7008                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7009 #endif
7010                 /*
7011                  * Now do we need to find a new
7012                  * asoc->highest_tsn_inside_map?
7013                  */
7014                 asoc->last_revoke_count = cnt;
7015                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7016                 /* sa_ignore NO_NULL_CHK */
7017                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7018                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7019         }
7020         /*
7021          * Another issue, in un-setting the TSN's in the mapping array we
7022          * DID NOT adjust the highest_tsn marker.  This will cause one of
7023          * two things to occur. It may cause us to do extra work in checking
7024          * for our mapping array movement. More importantly it may cause us
7025          * to SACK every datagram. This may not be a bad thing though since
7026          * we will recover once we get our cum-ack above and all this stuff
7027          * we dumped recovered.
7028          */
7029 }
7030
7031 void
7032 sctp_drain()
7033 {
7034         /*
7035          * We must walk the PCB lists for ALL associations here. The system
7036          * is LOW on MBUF's and needs help. This is where reneging will
7037          * occur. We really hope this does NOT happen!
7038          */
7039         VNET_ITERATOR_DECL(vnet_iter);
7040         VNET_LIST_RLOCK_NOSLEEP();
7041         VNET_FOREACH(vnet_iter) {
7042                 CURVNET_SET(vnet_iter);
7043                 struct sctp_inpcb *inp;
7044                 struct sctp_tcb *stcb;
7045
7046                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7047                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7048 #ifdef VIMAGE
7049                         continue;
7050 #else
7051                         return;
7052 #endif
7053                 }
7054                 SCTP_INP_INFO_RLOCK();
7055                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7056                         /* For each endpoint */
7057                         SCTP_INP_RLOCK(inp);
7058                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7059                                 /* For each association */
7060                                 SCTP_TCB_LOCK(stcb);
7061                                 sctp_drain_mbufs(stcb);
7062                                 SCTP_TCB_UNLOCK(stcb);
7063                         }
7064                         SCTP_INP_RUNLOCK(inp);
7065                 }
7066                 SCTP_INP_INFO_RUNLOCK();
7067                 CURVNET_RESTORE();
7068         }
7069         VNET_LIST_RUNLOCK_NOSLEEP();
7070 }
7071
7072 /*
7073  * start a new iterator
7074  * iterates through all endpoints and associations based on the pcb_state
7075  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7076  * assocs and "ef" (optional) is executed when the iterator completes.
7077  * "inpf" (optional) is executed for each new endpoint as it is being
7078  * iterated through. inpe (optional) is called when the inp completes
7079  * its way through all the stcbs.
7080  */
7081 int
7082 sctp_initiate_iterator(inp_func inpf,
7083     asoc_func af,
7084     inp_func inpe,
7085     uint32_t pcb_state,
7086     uint32_t pcb_features,
7087     uint32_t asoc_state,
7088     void *argp,
7089     uint32_t argi,
7090     end_func ef,
7091     struct sctp_inpcb *s_inp,
7092     uint8_t chunk_output_off)
7093 {
7094         struct sctp_iterator *it = NULL;
7095
7096         if (af == NULL) {
7097                 return (-1);
7098         }
7099         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7100             SCTP_M_ITER);
7101         if (it == NULL) {
7102                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7103                 return (ENOMEM);
7104         }
7105         memset(it, 0, sizeof(*it));
7106         it->function_assoc = af;
7107         it->function_inp = inpf;
7108         if (inpf)
7109                 it->done_current_ep = 0;
7110         else
7111                 it->done_current_ep = 1;
7112         it->function_atend = ef;
7113         it->pointer = argp;
7114         it->val = argi;
7115         it->pcb_flags = pcb_state;
7116         it->pcb_features = pcb_features;
7117         it->asoc_state = asoc_state;
7118         it->function_inp_end = inpe;
7119         it->no_chunk_output = chunk_output_off;
7120         it->vn = curvnet;
7121         if (s_inp) {
7122                 /* Assume lock is held here */
7123                 it->inp = s_inp;
7124                 SCTP_INP_INCR_REF(it->inp);
7125                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7126         } else {
7127                 SCTP_INP_INFO_RLOCK();
7128                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7129                 if (it->inp) {
7130                         SCTP_INP_INCR_REF(it->inp);
7131                 }
7132                 SCTP_INP_INFO_RUNLOCK();
7133                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7134
7135         }
7136         SCTP_IPI_ITERATOR_WQ_LOCK();
7137
7138         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7139         if (sctp_it_ctl.iterator_running == 0) {
7140                 sctp_wakeup_iterator();
7141         }
7142         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7143         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7144         return (0);
7145 }