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