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                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 563                 } else {
 564                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 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                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 772                                         /* They match its a correct delete */
 773                                         valid = 1;
 774                                 }
 775                         }
 776                         if (!valid) {
 777                                 /* last ditch check ifn_index */
 778                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 779                                         valid = 1;
 780                                 }
 781                         }
 782                         if (!valid) {
 783                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 784                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 785                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 786                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 787                                 SCTP_IPI_ADDR_WUNLOCK();
 788                                 return;
 789                         }
 790                 }
 791                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 792                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 793                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 794                 vrf->total_ifa_count--;
 795                 LIST_REMOVE(sctp_ifap, next_bucket);
 796                 sctp_remove_ifa_from_ifn(sctp_ifap);
 797         }
 798 #ifdef SCTP_DEBUG
 799         else {
 800                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 801                     ifn_index);
 802                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 803         }
 804 #endif
 805
 806 out_now:
 807         SCTP_IPI_ADDR_WUNLOCK();
 808         if (sctp_ifap) {
 809                 struct sctp_laddr *wi;
 810
 811                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 812                 if (wi == NULL) {
 813                         /*
 814                          * Gak, what can we do? We have lost an address
 815                          * change can you say HOSED?
 816                          */
 817                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 818
 819                         /* Oops, must decrement the count */
 820                         sctp_free_ifa(sctp_ifap);
 821                         return;
 822                 }
 823                 SCTP_INCR_LADDR_COUNT();
 824                 bzero(wi, sizeof(*wi));
 825                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 826                 wi->ifa = sctp_ifap;
 827                 wi->action = SCTP_DEL_IP_ADDRESS;
 828                 SCTP_WQ_ADDR_LOCK();
 829                 /*
 830                  * Should this really be a tailq? As it is we will process
 831                  * the newest first :-0
 832                  */
 833                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 834                 SCTP_WQ_ADDR_UNLOCK();
 835
 836                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 837                     (struct sctp_inpcb *)NULL,
 838                     (struct sctp_tcb *)NULL,
 839                     (struct sctp_nets *)NULL);
 840         }
 841         return;
 842 }
 843
 844
 845 static struct sctp_tcb *
 846 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 847     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 848 {
 849         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 850         /*
 851          * If we support the TCP model, then we must now dig through to see
 852          * if we can find our endpoint in the list of tcp ep's.
 853          */
 854         uint16_t lport, rport;
 855         struct sctppcbhead *ephead;
 856         struct sctp_inpcb *inp;
 857         struct sctp_laddr *laddr;
 858         struct sctp_tcb *stcb;
 859         struct sctp_nets *net;
 860
 861         if ((to == NULL) || (from == NULL)) {
 862                 return (NULL);
 863         }
 864         switch (to->sa_family) {
 865 #ifdef INET
 866         case AF_INET:
 867                 if (from->sa_family == AF_INET) {
 868                         lport = ((struct sockaddr_in *)to)->sin_port;
 869                         rport = ((struct sockaddr_in *)from)->sin_port;
 870                 } else {
 871                         return (NULL);
 872                 }
 873                 break;
 874 #endif
 875 #ifdef INET6
 876         case AF_INET6:
 877                 if (from->sa_family == AF_INET6) {
 878                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 879                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 880                 } else {
 881                         return (NULL);
 882                 }
 883                 break;
 884 #endif
 885         default:
 886                 return (NULL);
 887         }
 888         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 889         /*
 890          * Ok now for each of the guys in this bucket we must look and see:
 891          * - Does the remote port match. - Does there single association's
 892          * addresses match this address (to). If so we update p_ep to point
 893          * to this ep and return the tcb from it.
 894          */
 895         LIST_FOREACH(inp, ephead, sctp_hash) {
 896                 SCTP_INP_RLOCK(inp);
 897                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 898                         SCTP_INP_RUNLOCK(inp);
 899                         continue;
 900                 }
 901                 if (lport != inp->sctp_lport) {
 902                         SCTP_INP_RUNLOCK(inp);
 903                         continue;
 904                 }
 905                 if (inp->def_vrf_id != vrf_id) {
 906                         SCTP_INP_RUNLOCK(inp);
 907                         continue;
 908                 }
 909                 /* check to see if the ep has one of the addresses */
 910                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 911                         /* We are NOT bound all, so look further */
 912                         int match = 0;
 913
 914                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 915
 916                                 if (laddr->ifa == NULL) {
 917                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 918                                         continue;
 919                                 }
 920                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 921                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 922                                         continue;
 923                                 }
 924                                 if (laddr->ifa->address.sa.sa_family ==
 925                                     to->sa_family) {
 926                                         /* see if it matches */
 927
 928 #ifdef INET
 929                                         if (from->sa_family == AF_INET) {
 930                                                 struct sockaddr_in *intf_addr,
 931                                                            *sin;
 932
 933                                                 intf_addr = &laddr->ifa->address.sin;
 934                                                 sin = (struct sockaddr_in *)to;
 935                                                 if (sin->sin_addr.s_addr ==
 936                                                     intf_addr->sin_addr.s_addr) {
 937                                                         match = 1;
 938                                                         break;
 939                                                 }
 940                                         }
 941 #endif
 942 #ifdef INET6
 943                                         if (from->sa_family == AF_INET6) {
 944                                                 struct sockaddr_in6 *intf_addr6;
 945                                                 struct sockaddr_in6 *sin6;
 946
 947                                                 sin6 = (struct sockaddr_in6 *)
 948                                                     to;
 949                                                 intf_addr6 = &laddr->ifa->address.sin6;
 950
 951                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 952                                                     intf_addr6)) {
 953                                                         match = 1;
 954                                                         break;
 955                                                 }
 956                                         }
 957 #endif
 958                                 }
 959                         }
 960                         if (match == 0) {
 961                                 /* This endpoint does not have this address */
 962                                 SCTP_INP_RUNLOCK(inp);
 963                                 continue;
 964                         }
 965                 }
 966                 /*
 967                  * Ok if we hit here the ep has the address, does it hold
 968                  * the tcb?
 969                  */
 970
 971                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 972                 if (stcb == NULL) {
 973                         SCTP_INP_RUNLOCK(inp);
 974                         continue;
 975                 }
 976                 SCTP_TCB_LOCK(stcb);
 977                 if (stcb->rport != rport) {
 978                         /* remote port does not match. */
 979                         SCTP_TCB_UNLOCK(stcb);
 980                         SCTP_INP_RUNLOCK(inp);
 981                         continue;
 982                 }
 983                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 984                         SCTP_TCB_UNLOCK(stcb);
 985                         SCTP_INP_RUNLOCK(inp);
 986                         continue;
 987                 }
 988                 /* Does this TCB have a matching address? */
 989                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 990
 991                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 992                                 /* not the same family, can't be a match */
 993                                 continue;
 994                         }
 995                         switch (from->sa_family) {
 996 #ifdef INET
 997                         case AF_INET:
 998                                 {
 999                                         struct sockaddr_in *sin, *rsin;
1000
1001                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1002                                         rsin = (struct sockaddr_in *)from;
1003                                         if (sin->sin_addr.s_addr ==
1004                                             rsin->sin_addr.s_addr) {
1005                                                 /* found it */
1006                                                 if (netp != NULL) {
1007                                                         *netp = net;
1008                                                 }
1009                                                 /*
1010                                                  * Update the endpoint
1011                                                  * pointer
1012                                                  */
1013                                                 *inp_p = inp;
1014                                                 SCTP_INP_RUNLOCK(inp);
1015                                                 return (stcb);
1016                                         }
1017                                         break;
1018                                 }
1019 #endif
1020 #ifdef INET6
1021                         case AF_INET6:
1022                                 {
1023                                         struct sockaddr_in6 *sin6, *rsin6;
1024
1025                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1026                                         rsin6 = (struct sockaddr_in6 *)from;
1027                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1028                                             rsin6)) {
1029                                                 /* found it */
1030                                                 if (netp != NULL) {
1031                                                         *netp = net;
1032                                                 }
1033                                                 /*
1034                                                  * Update the endpoint
1035                                                  * pointer
1036                                                  */
1037                                                 *inp_p = inp;
1038                                                 SCTP_INP_RUNLOCK(inp);
1039                                                 return (stcb);
1040                                         }
1041                                         break;
1042                                 }
1043 #endif
1044                         default:
1045                                 /* TSNH */
1046                                 break;
1047                         }
1048                 }
1049                 SCTP_TCB_UNLOCK(stcb);
1050                 SCTP_INP_RUNLOCK(inp);
1051         }
1052         return (NULL);
1053 }
1054
1055 static int
1056 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1057 {
1058         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1059         int ipv4_addr_legal, ipv6_addr_legal;
1060         struct sctp_vrf *vrf;
1061         struct sctp_ifn *sctp_ifn;
1062         struct sctp_ifa *sctp_ifa;
1063
1064         loopback_scope = stcb->asoc.loopback_scope;
1065         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1066         local_scope = stcb->asoc.local_scope;
1067         site_scope = stcb->asoc.site_scope;
1068         ipv4_addr_legal = ipv6_addr_legal = 0;
1069         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1070                 ipv6_addr_legal = 1;
1071                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1072                         ipv4_addr_legal = 1;
1073                 }
1074         } else {
1075                 ipv4_addr_legal = 1;
1076         }
1077
1078         SCTP_IPI_ADDR_RLOCK();
1079         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1080         if (vrf == NULL) {
1081                 /* no vrf, no addresses */
1082                 SCTP_IPI_ADDR_RUNLOCK();
1083                 return (0);
1084         }
1085         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1086                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1087                         if ((loopback_scope == 0) &&
1088                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1089                                 continue;
1090                         }
1091                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1092                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
1093                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
1094                                         /*
1095                                          * We allow pending addresses, where
1096                                          * we have sent an asconf-add to be
1097                                          * considered valid.
1098                                          */
1099                                         continue;
1100                                 }
1101                                 switch (sctp_ifa->address.sa.sa_family) {
1102 #ifdef INET
1103                                 case AF_INET:
1104                                         if (ipv4_addr_legal) {
1105                                                 struct sockaddr_in *sin,
1106                                                            *rsin;
1107
1108                                                 sin = &sctp_ifa->address.sin;
1109                                                 rsin = (struct sockaddr_in *)to;
1110                                                 if ((ipv4_local_scope == 0) &&
1111                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1112                                                         continue;
1113                                                 }
1114                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1115                                                         SCTP_IPI_ADDR_RUNLOCK();
1116                                                         return (1);
1117                                                 }
1118                                         }
1119                                         break;
1120 #endif
1121 #ifdef INET6
1122                                 case AF_INET6:
1123                                         if (ipv6_addr_legal) {
1124                                                 struct sockaddr_in6 *sin6,
1125                                                             *rsin6;
1126
1127                                                 sin6 = &sctp_ifa->address.sin6;
1128                                                 rsin6 = (struct sockaddr_in6 *)to;
1129                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1130                                                         if (local_scope == 0)
1131                                                                 continue;
1132                                                         if (sin6->sin6_scope_id == 0) {
1133                                                                 if (sa6_recoverscope(sin6) != 0)
1134                                                                         continue;
1135                                                         }
1136                                                 }
1137                                                 if ((site_scope == 0) &&
1138                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1139                                                         continue;
1140                                                 }
1141                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1142                                                         SCTP_IPI_ADDR_RUNLOCK();
1143                                                         return (1);
1144                                                 }
1145                                         }
1146                                         break;
1147 #endif
1148                                 default:
1149                                         /* TSNH */
1150                                         break;
1151                                 }
1152                         }
1153                 }
1154         } else {
1155                 struct sctp_laddr *laddr;
1156
1157                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1158                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
1159                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
1160                                 /*
1161                                  * We allow pending addresses, where we have
1162                                  * sent an asconf-add to be considered
1163                                  * valid.
1164                                  */
1165                                 continue;
1166                         }
1167                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1168                                 continue;
1169                         }
1170                         switch (to->sa_family) {
1171 #ifdef INET
1172                         case AF_INET:
1173                                 {
1174                                         struct sockaddr_in *sin, *rsin;
1175
1176                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1177                                         rsin = (struct sockaddr_in *)to;
1178                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1179                                                 SCTP_IPI_ADDR_RUNLOCK();
1180                                                 return (1);
1181                                         }
1182                                         break;
1183                                 }
1184 #endif
1185 #ifdef INET6
1186                         case AF_INET6:
1187                                 {
1188                                         struct sockaddr_in6 *sin6, *rsin6;
1189
1190                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1191                                         rsin6 = (struct sockaddr_in6 *)to;
1192                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1193                                                 SCTP_IPI_ADDR_RUNLOCK();
1194                                                 return (1);
1195                                         }
1196                                         break;
1197                                 }
1198
1199 #endif
1200                         default:
1201                                 /* TSNH */
1202                                 break;
1203                         }
1204
1205                 }
1206         }
1207         SCTP_IPI_ADDR_RUNLOCK();
1208         return (0);
1209 }
1210
1211 /*
1212  * rules for use
1213  *
1214  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1215  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1216  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1217  * NULL.
1218  */
1219
1220 struct sctp_tcb *
1221 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1222     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1223 {
1224         struct sctpasochead *head;
1225         struct sctp_inpcb *inp;
1226         struct sctp_tcb *stcb = NULL;
1227         struct sctp_nets *net;
1228         uint16_t rport;
1229
1230         inp = *inp_p;
1231         if (remote->sa_family == AF_INET) {
1232                 rport = (((struct sockaddr_in *)remote)->sin_port);
1233         } else if (remote->sa_family == AF_INET6) {
1234                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1235         } else {
1236                 return (NULL);
1237         }
1238         if (locked_tcb) {
1239                 /*
1240                  * UN-lock so we can do proper locking here this occurs when
1241                  * called from load_addresses_from_init.
1242                  */
1243                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1244                 SCTP_TCB_UNLOCK(locked_tcb);
1245         }
1246         SCTP_INP_INFO_RLOCK();
1247         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1248                 /*-
1249                  * Now either this guy is our listener or it's the
1250                  * connector. If it is the one that issued the connect, then
1251                  * it's only chance is to be the first TCB in the list. If
1252                  * it is the acceptor, then do the special_lookup to hash
1253                  * and find the real inp.
1254                  */
1255                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1256                         /* to is peer addr, from is my addr */
1257                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1258                             netp, inp->def_vrf_id);
1259                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1260                                 /* we have a locked tcb, lower refcount */
1261                                 SCTP_INP_DECR_REF(inp);
1262                         }
1263                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1264                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1265                                 SCTP_TCB_LOCK(locked_tcb);
1266                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1267                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1268                         }
1269                         SCTP_INP_INFO_RUNLOCK();
1270                         return (stcb);
1271                 } else {
1272                         SCTP_INP_WLOCK(inp);
1273                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1274                                 goto null_return;
1275                         }
1276                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1277                         if (stcb == NULL) {
1278                                 goto null_return;
1279                         }
1280                         SCTP_TCB_LOCK(stcb);
1281
1282                         if (stcb->rport != rport) {
1283                                 /* remote port does not match. */
1284                                 SCTP_TCB_UNLOCK(stcb);
1285                                 goto null_return;
1286                         }
1287                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1288                                 SCTP_TCB_UNLOCK(stcb);
1289                                 goto null_return;
1290                         }
1291                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1292                                 SCTP_TCB_UNLOCK(stcb);
1293                                 goto null_return;
1294                         }
1295                         /* now look at the list of remote addresses */
1296                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1297 #ifdef INVARIANTS
1298                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1299                                         panic("Corrupt net list");
1300                                 }
1301 #endif
1302                                 if (net->ro._l_addr.sa.sa_family !=
1303                                     remote->sa_family) {
1304                                         /* not the same family */
1305                                         continue;
1306                                 }
1307                                 switch (remote->sa_family) {
1308 #ifdef INET
1309                                 case AF_INET:
1310                                         {
1311                                                 struct sockaddr_in *sin,
1312                                                            *rsin;
1313
1314                                                 sin = (struct sockaddr_in *)
1315                                                     &net->ro._l_addr;
1316                                                 rsin = (struct sockaddr_in *)remote;
1317                                                 if (sin->sin_addr.s_addr ==
1318                                                     rsin->sin_addr.s_addr) {
1319                                                         /* found it */
1320                                                         if (netp != NULL) {
1321                                                                 *netp = net;
1322                                                         }
1323                                                         if (locked_tcb == NULL) {
1324                                                                 SCTP_INP_DECR_REF(inp);
1325                                                         } else if (locked_tcb != stcb) {
1326                                                                 SCTP_TCB_LOCK(locked_tcb);
1327                                                         }
1328                                                         if (locked_tcb) {
1329                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330                                                         }
1331                                                         SCTP_INP_WUNLOCK(inp);
1332                                                         SCTP_INP_INFO_RUNLOCK();
1333                                                         return (stcb);
1334                                                 }
1335                                                 break;
1336                                         }
1337 #endif
1338 #ifdef INET6
1339                                 case AF_INET6:
1340                                         {
1341                                                 struct sockaddr_in6 *sin6,
1342                                                             *rsin6;
1343
1344                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1345                                                 rsin6 = (struct sockaddr_in6 *)remote;
1346                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1347                                                     rsin6)) {
1348                                                         /* found it */
1349                                                         if (netp != NULL) {
1350                                                                 *netp = net;
1351                                                         }
1352                                                         if (locked_tcb == NULL) {
1353                                                                 SCTP_INP_DECR_REF(inp);
1354                                                         } else if (locked_tcb != stcb) {
1355                                                                 SCTP_TCB_LOCK(locked_tcb);
1356                                                         }
1357                                                         if (locked_tcb) {
1358                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1359                                                         }
1360                                                         SCTP_INP_WUNLOCK(inp);
1361                                                         SCTP_INP_INFO_RUNLOCK();
1362                                                         return (stcb);
1363                                                 }
1364                                                 break;
1365                                         }
1366 #endif
1367                                 default:
1368                                         /* TSNH */
1369                                         break;
1370                                 }
1371                         }
1372                         SCTP_TCB_UNLOCK(stcb);
1373                 }
1374         } else {
1375                 SCTP_INP_WLOCK(inp);
1376                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1377                         goto null_return;
1378                 }
1379                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1380                     inp->sctp_hashmark)];
1381                 if (head == NULL) {
1382                         goto null_return;
1383                 }
1384                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1385                         if (stcb->rport != rport) {
1386                                 /* remote port does not match */
1387                                 continue;
1388                         }
1389                         SCTP_TCB_LOCK(stcb);
1390                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1391                                 SCTP_TCB_UNLOCK(stcb);
1392                                 continue;
1393                         }
1394                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1395                                 SCTP_TCB_UNLOCK(stcb);
1396                                 continue;
1397                         }
1398                         /* now look at the list of remote addresses */
1399                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1400 #ifdef INVARIANTS
1401                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1402                                         panic("Corrupt net list");
1403                                 }
1404 #endif
1405                                 if (net->ro._l_addr.sa.sa_family !=
1406                                     remote->sa_family) {
1407                                         /* not the same family */
1408                                         continue;
1409                                 }
1410                                 switch (remote->sa_family) {
1411 #ifdef INET
1412                                 case AF_INET:
1413                                         {
1414                                                 struct sockaddr_in *sin,
1415                                                            *rsin;
1416
1417                                                 sin = (struct sockaddr_in *)
1418                                                     &net->ro._l_addr;
1419                                                 rsin = (struct sockaddr_in *)remote;
1420                                                 if (sin->sin_addr.s_addr ==
1421                                                     rsin->sin_addr.s_addr) {
1422                                                         /* found it */
1423                                                         if (netp != NULL) {
1424                                                                 *netp = net;
1425                                                         }
1426                                                         if (locked_tcb == NULL) {
1427                                                                 SCTP_INP_DECR_REF(inp);
1428                                                         } else if (locked_tcb != stcb) {
1429                                                                 SCTP_TCB_LOCK(locked_tcb);
1430                                                         }
1431                                                         if (locked_tcb) {
1432                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1433                                                         }
1434                                                         SCTP_INP_WUNLOCK(inp);
1435                                                         SCTP_INP_INFO_RUNLOCK();
1436                                                         return (stcb);
1437                                                 }
1438                                                 break;
1439                                         }
1440 #endif
1441 #ifdef INET6
1442                                 case AF_INET6:
1443                                         {
1444                                                 struct sockaddr_in6 *sin6,
1445                                                             *rsin6;
1446
1447                                                 sin6 = (struct sockaddr_in6 *)
1448                                                     &net->ro._l_addr;
1449                                                 rsin6 = (struct sockaddr_in6 *)remote;
1450                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1451                                                     rsin6)) {
1452                                                         /* found it */
1453                                                         if (netp != NULL) {
1454                                                                 *netp = net;
1455                                                         }
1456                                                         if (locked_tcb == NULL) {
1457                                                                 SCTP_INP_DECR_REF(inp);
1458                                                         } else if (locked_tcb != stcb) {
1459                                                                 SCTP_TCB_LOCK(locked_tcb);
1460                                                         }
1461                                                         if (locked_tcb) {
1462                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1463                                                         }
1464                                                         SCTP_INP_WUNLOCK(inp);
1465                                                         SCTP_INP_INFO_RUNLOCK();
1466                                                         return (stcb);
1467                                                 }
1468                                                 break;
1469                                         }
1470 #endif
1471                                 default:
1472                                         /* TSNH */
1473                                         break;
1474                                 }
1475                         }
1476                         SCTP_TCB_UNLOCK(stcb);
1477                 }
1478         }
1479 null_return:
1480         /* clean up for returning null */
1481         if (locked_tcb) {
1482                 SCTP_TCB_LOCK(locked_tcb);
1483                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1484         }
1485         SCTP_INP_WUNLOCK(inp);
1486         SCTP_INP_INFO_RUNLOCK();
1487         /* not found */
1488         return (NULL);
1489 }
1490
1491 /*
1492  * Find an association for a specific endpoint using the association id given
1493  * out in the COMM_UP notification
1494  */
1495
1496 struct sctp_tcb *
1497 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1498 {
1499         /*
1500          * Use my the assoc_id to find a endpoint
1501          */
1502         struct sctpasochead *head;
1503         struct sctp_tcb *stcb;
1504         uint32_t id;
1505
1506         if (inp == NULL) {
1507                 SCTP_PRINTF("TSNH ep_associd\n");
1508                 return (NULL);
1509         }
1510         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1511                 SCTP_PRINTF("TSNH ep_associd0\n");
1512                 return (NULL);
1513         }
1514         id = (uint32_t) asoc_id;
1515         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1516         if (head == NULL) {
1517                 /* invalid id TSNH */
1518                 SCTP_PRINTF("TSNH ep_associd1\n");
1519                 return (NULL);
1520         }
1521         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1522                 if (stcb->asoc.assoc_id == id) {
1523                         if (inp != stcb->sctp_ep) {
1524                                 /*
1525                                  * some other guy has the same id active (id
1526                                  * collision ??).
1527                                  */
1528                                 SCTP_PRINTF("TSNH ep_associd2\n");
1529                                 continue;
1530                         }
1531                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1532                                 continue;
1533                         }
1534                         if (want_lock) {
1535                                 SCTP_TCB_LOCK(stcb);
1536                         }
1537                         return (stcb);
1538                 }
1539         }
1540         return (NULL);
1541 }
1542
1543
1544 struct sctp_tcb *
1545 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1546 {
1547         struct sctp_tcb *stcb;
1548
1549         SCTP_INP_RLOCK(inp);
1550         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1551         SCTP_INP_RUNLOCK(inp);
1552         return (stcb);
1553 }
1554
1555
1556 static struct sctp_inpcb *
1557 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1558     uint16_t lport, uint32_t vrf_id)
1559 {
1560         struct sctp_inpcb *inp;
1561         struct sctp_laddr *laddr;
1562
1563 #ifdef INET
1564         struct sockaddr_in *sin;
1565
1566 #endif
1567 #ifdef INET6
1568         struct sockaddr_in6 *sin6;
1569         struct sockaddr_in6 *intf_addr6;
1570
1571 #endif
1572
1573         int fnd;
1574
1575         /*
1576          * Endpoint probe expects that the INP_INFO is locked.
1577          */
1578 #ifdef INET
1579         sin = NULL;
1580 #endif
1581 #ifdef INET6
1582         sin6 = NULL;
1583 #endif
1584         switch (nam->sa_family) {
1585 #ifdef INET
1586         case AF_INET:
1587                 sin = (struct sockaddr_in *)nam;
1588                 break;
1589 #endif
1590 #ifdef INET6
1591         case AF_INET6:
1592                 sin6 = (struct sockaddr_in6 *)nam;
1593                 break;
1594 #endif
1595         default:
1596                 /* unsupported family */
1597                 return (NULL);
1598         }
1599
1600         if (head == NULL)
1601                 return (NULL);
1602
1603         LIST_FOREACH(inp, head, sctp_hash) {
1604                 SCTP_INP_RLOCK(inp);
1605                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1606                         SCTP_INP_RUNLOCK(inp);
1607                         continue;
1608                 }
1609                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1610                     (inp->sctp_lport == lport)) {
1611                         /* got it */
1612 #ifdef INET
1613                         if ((nam->sa_family == AF_INET) &&
1614                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1615                             SCTP_IPV6_V6ONLY(inp)) {
1616                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1617                                 SCTP_INP_RUNLOCK(inp);
1618                                 continue;
1619                         }
1620 #endif
1621 #ifdef INET6
1622                         /* A V6 address and the endpoint is NOT bound V6 */
1623                         if (nam->sa_family == AF_INET6 &&
1624                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1625                                 SCTP_INP_RUNLOCK(inp);
1626                                 continue;
1627                         }
1628 #endif
1629                         /* does a VRF id match? */
1630                         fnd = 0;
1631                         if (inp->def_vrf_id == vrf_id)
1632                                 fnd = 1;
1633
1634                         SCTP_INP_RUNLOCK(inp);
1635                         if (!fnd)
1636                                 continue;
1637                         return (inp);
1638                 }
1639                 SCTP_INP_RUNLOCK(inp);
1640         }
1641         switch (nam->sa_family) {
1642 #ifdef INET
1643         case AF_INET:
1644                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1645                         /* Can't hunt for one that has no address specified */
1646                         return (NULL);
1647                 }
1648                 break;
1649 #endif
1650 #ifdef INET6
1651         case AF_INET6:
1652                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1653                         /* Can't hunt for one that has no address specified */
1654                         return (NULL);
1655                 }
1656                 break;
1657 #endif
1658         default:
1659                 break;
1660         }
1661         /*
1662          * ok, not bound to all so see if we can find a EP bound to this
1663          * address.
1664          */
1665         LIST_FOREACH(inp, head, sctp_hash) {
1666                 SCTP_INP_RLOCK(inp);
1667                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1668                         SCTP_INP_RUNLOCK(inp);
1669                         continue;
1670                 }
1671                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1672                         SCTP_INP_RUNLOCK(inp);
1673                         continue;
1674                 }
1675                 /*
1676                  * Ok this could be a likely candidate, look at all of its
1677                  * addresses
1678                  */
1679                 if (inp->sctp_lport != lport) {
1680                         SCTP_INP_RUNLOCK(inp);
1681                         continue;
1682                 }
1683                 /* does a VRF id match? */
1684                 fnd = 0;
1685                 if (inp->def_vrf_id == vrf_id)
1686                         fnd = 1;
1687
1688                 if (!fnd) {
1689                         SCTP_INP_RUNLOCK(inp);
1690                         continue;
1691                 }
1692                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1693                         if (laddr->ifa == NULL) {
1694                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1695                                     __FUNCTION__);
1696                                 continue;
1697                         }
1698                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1699                             laddr->ifa);
1700                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1701                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1702                                 continue;
1703                         }
1704                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1705                                 /* possible, see if it matches */
1706                                 switch (nam->sa_family) {
1707 #ifdef INET
1708                                 case AF_INET:
1709                                         if (sin->sin_addr.s_addr ==
1710                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1711                                                 SCTP_INP_RUNLOCK(inp);
1712                                                 return (inp);
1713                                         }
1714                                         break;
1715 #endif
1716 #ifdef INET6
1717                                 case AF_INET6:
1718                                         intf_addr6 = &laddr->ifa->address.sin6;
1719                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1720                                             intf_addr6)) {
1721                                                 SCTP_INP_RUNLOCK(inp);
1722                                                 return (inp);
1723                                         }
1724                                         break;
1725 #endif
1726                                 }
1727                         }
1728                 }
1729                 SCTP_INP_RUNLOCK(inp);
1730         }
1731         return (NULL);
1732 }
1733
1734
1735 static struct sctp_inpcb *
1736 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1737 {
1738         struct sctppcbhead *head;
1739         struct sctp_inpcb *t_inp;
1740         int fnd;
1741
1742         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1743             SCTP_BASE_INFO(hashmark))];
1744         LIST_FOREACH(t_inp, head, sctp_hash) {
1745                 if (t_inp->sctp_lport != lport) {
1746                         continue;
1747                 }
1748                 /* is it in the VRF in question */
1749                 fnd = 0;
1750                 if (t_inp->def_vrf_id == vrf_id)
1751                         fnd = 1;
1752                 if (!fnd)
1753                         continue;
1754
1755                 /* This one is in use. */
1756                 /* check the v6/v4 binding issue */
1757                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1758                     SCTP_IPV6_V6ONLY(t_inp)) {
1759                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1760                                 /* collision in V6 space */
1761                                 return (t_inp);
1762                         } else {
1763                                 /* inp is BOUND_V4 no conflict */
1764                                 continue;
1765                         }
1766                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1767                         /* t_inp is bound v4 and v6, conflict always */
1768                         return (t_inp);
1769                 } else {
1770                         /* t_inp is bound only V4 */
1771                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1772                             SCTP_IPV6_V6ONLY(inp)) {
1773                                 /* no conflict */
1774                                 continue;
1775                         }
1776                         /* else fall through to conflict */
1777                 }
1778                 return (t_inp);
1779         }
1780         return (NULL);
1781 }
1782
1783
1784 int
1785 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1786 {
1787         /* For 1-2-1 with port reuse */
1788         struct sctppcbhead *head;
1789         struct sctp_inpcb *tinp;
1790
1791         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1792                 /* only works with port reuse on */
1793                 return (-1);
1794         }
1795         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1796                 return (0);
1797         }
1798         SCTP_INP_RUNLOCK(inp);
1799         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1800             SCTP_BASE_INFO(hashmark))];
1801         /* Kick out all non-listeners to the TCP hash */
1802         LIST_FOREACH(tinp, head, sctp_hash) {
1803                 if (tinp->sctp_lport != inp->sctp_lport) {
1804                         continue;
1805                 }
1806                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1807                         continue;
1808                 }
1809                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1810                         continue;
1811                 }
1812                 if (tinp->sctp_socket->so_qlimit) {
1813                         continue;
1814                 }
1815                 SCTP_INP_WLOCK(tinp);
1816                 LIST_REMOVE(tinp, sctp_hash);
1817                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1818                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1819                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1820                 SCTP_INP_WUNLOCK(tinp);
1821         }
1822         SCTP_INP_WLOCK(inp);
1823         /* Pull from where he was */
1824         LIST_REMOVE(inp, sctp_hash);
1825         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1826         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1827         LIST_INSERT_HEAD(head, inp, sctp_hash);
1828         SCTP_INP_WUNLOCK(inp);
1829         SCTP_INP_RLOCK(inp);
1830         return (0);
1831 }
1832
1833
1834 struct sctp_inpcb *
1835 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1836     uint32_t vrf_id)
1837 {
1838         /*
1839          * First we check the hash table to see if someone has this port
1840          * bound with just the port.
1841          */
1842         struct sctp_inpcb *inp;
1843         struct sctppcbhead *head;
1844         int lport;
1845         unsigned int i;
1846
1847 #ifdef INET
1848         struct sockaddr_in *sin;
1849
1850 #endif
1851 #ifdef INET6
1852         struct sockaddr_in6 *sin6;
1853
1854 #endif
1855
1856         switch (nam->sa_family) {
1857 #ifdef INET
1858         case AF_INET:
1859                 sin = (struct sockaddr_in *)nam;
1860                 lport = ((struct sockaddr_in *)nam)->sin_port;
1861                 break;
1862 #endif
1863 #ifdef INET6
1864         case AF_INET6:
1865                 sin6 = (struct sockaddr_in6 *)nam;
1866                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1867                 break;
1868 #endif
1869         default:
1870                 return (NULL);
1871         }
1872         /*
1873          * I could cheat here and just cast to one of the types but we will
1874          * do it right. It also provides the check against an Unsupported
1875          * type too.
1876          */
1877         /* Find the head of the ALLADDR chain */
1878         if (have_lock == 0) {
1879                 SCTP_INP_INFO_RLOCK();
1880         }
1881         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1882             SCTP_BASE_INFO(hashmark))];
1883         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1884
1885         /*
1886          * If the TCP model exists it could be that the main listening
1887          * endpoint is gone but there still exists a connected socket for
1888          * this guy. If so we can return the first one that we find. This
1889          * may NOT be the correct one so the caller should be wary on the
1890          * returned INP. Currently the only caller that sets find_tcp_pool
1891          * is in bindx where we are verifying that a user CAN bind the
1892          * address. He either has bound it already, or someone else has, or
1893          * its open to bind, so this is good enough.
1894          */
1895         if (inp == NULL && find_tcp_pool) {
1896                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1897                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1898                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1899                         if (inp) {
1900                                 break;
1901                         }
1902                 }
1903         }
1904         if (inp) {
1905                 SCTP_INP_INCR_REF(inp);
1906         }
1907         if (have_lock == 0) {
1908                 SCTP_INP_INFO_RUNLOCK();
1909         }
1910         return (inp);
1911 }
1912
1913 /*
1914  * Find an association for an endpoint with the pointer to whom you want to
1915  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1916  * need to change the *to to some other struct like a mbuf...
1917  */
1918 struct sctp_tcb *
1919 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1920     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1921     uint32_t vrf_id)
1922 {
1923         struct sctp_inpcb *inp = NULL;
1924         struct sctp_tcb *retval;
1925
1926         SCTP_INP_INFO_RLOCK();
1927         if (find_tcp_pool) {
1928                 if (inp_p != NULL) {
1929                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1930                             vrf_id);
1931                 } else {
1932                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1933                             vrf_id);
1934                 }
1935                 if (retval != NULL) {
1936                         SCTP_INP_INFO_RUNLOCK();
1937                         return (retval);
1938                 }
1939         }
1940         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1941         if (inp_p != NULL) {
1942                 *inp_p = inp;
1943         }
1944         SCTP_INP_INFO_RUNLOCK();
1945
1946         if (inp == NULL) {
1947                 return (NULL);
1948         }
1949         /*
1950          * ok, we have an endpoint, now lets find the assoc for it (if any)
1951          * we now place the source address or from in the to of the find
1952          * endpoint call. Since in reality this chain is used from the
1953          * inbound packet side.
1954          */
1955         if (inp_p != NULL) {
1956                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1957                     NULL);
1958         } else {
1959                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1960                     NULL);
1961         }
1962         return retval;
1963 }
1964
1965
1966 /*
1967  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1968  * find all addresses that the sender has specified in any address list. Each
1969  * address will be used to lookup the TCB and see if one exits.
1970  */
1971 static struct sctp_tcb *
1972 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1973     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1974     struct sockaddr *dest)
1975 {
1976         struct sctp_paramhdr *phdr, parm_buf;
1977         struct sctp_tcb *retval;
1978         uint32_t ptype, plen;
1979
1980 #ifdef INET
1981         struct sockaddr_in sin4;
1982
1983 #endif
1984 #ifdef INET6
1985         struct sockaddr_in6 sin6;
1986
1987 #endif
1988
1989 #ifdef INET
1990         memset(&sin4, 0, sizeof(sin4));
1991         sin4.sin_len = sizeof(sin4);
1992         sin4.sin_family = AF_INET;
1993         sin4.sin_port = sh->src_port;
1994 #endif
1995 #ifdef INET6
1996         memset(&sin6, 0, sizeof(sin6));
1997         sin6.sin6_len = sizeof(sin6);
1998         sin6.sin6_family = AF_INET6;
1999         sin6.sin6_port = sh->src_port;
2000 #endif
2001
2002         retval = NULL;
2003         offset += sizeof(struct sctp_init_chunk);
2004
2005         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2006         while (phdr != NULL) {
2007                 /* now we must see if we want the parameter */
2008                 ptype = ntohs(phdr->param_type);
2009                 plen = ntohs(phdr->param_length);
2010                 if (plen == 0) {
2011                         break;
2012                 }
2013 #ifdef INET
2014                 if (ptype == SCTP_IPV4_ADDRESS &&
2015                     plen == sizeof(struct sctp_ipv4addr_param)) {
2016                         /* Get the rest of the address */
2017                         struct sctp_ipv4addr_param ip4_parm, *p4;
2018
2019                         phdr = sctp_get_next_param(m, offset,
2020                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2021                         if (phdr == NULL) {
2022                                 return (NULL);
2023                         }
2024                         p4 = (struct sctp_ipv4addr_param *)phdr;
2025                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2026                         /* look it up */
2027                         retval = sctp_findassociation_ep_addr(inp_p,
2028                             (struct sockaddr *)&sin4, netp, dest, NULL);
2029                         if (retval != NULL) {
2030                                 return (retval);
2031                         }
2032                 }
2033 #endif
2034 #ifdef INET6
2035                 if (ptype == SCTP_IPV6_ADDRESS &&
2036                     plen == sizeof(struct sctp_ipv6addr_param)) {
2037                         /* Get the rest of the address */
2038                         struct sctp_ipv6addr_param ip6_parm, *p6;
2039
2040                         phdr = sctp_get_next_param(m, offset,
2041                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2042                         if (phdr == NULL) {
2043                                 return (NULL);
2044                         }
2045                         p6 = (struct sctp_ipv6addr_param *)phdr;
2046                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2047                         /* look it up */
2048                         retval = sctp_findassociation_ep_addr(inp_p,
2049                             (struct sockaddr *)&sin6, netp, dest, NULL);
2050                         if (retval != NULL) {
2051                                 return (retval);
2052                         }
2053                 }
2054 #endif
2055                 offset += SCTP_SIZE32(plen);
2056                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2057                     sizeof(parm_buf));
2058         }
2059         return (NULL);
2060 }
2061
2062 static struct sctp_tcb *
2063 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2064     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2065     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2066 {
2067         /*
2068          * Use my vtag to hash. If we find it we then verify the source addr
2069          * is in the assoc. If all goes well we save a bit on rec of a
2070          * packet.
2071          */
2072         struct sctpasochead *head;
2073         struct sctp_nets *net;
2074         struct sctp_tcb *stcb;
2075
2076         *netp = NULL;
2077         *inp_p = NULL;
2078         SCTP_INP_INFO_RLOCK();
2079         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2080             SCTP_BASE_INFO(hashasocmark))];
2081         if (head == NULL) {
2082                 /* invalid vtag */
2083                 SCTP_INP_INFO_RUNLOCK();
2084                 return (NULL);
2085         }
2086         LIST_FOREACH(stcb, head, sctp_asocs) {
2087                 SCTP_INP_RLOCK(stcb->sctp_ep);
2088                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2089                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2090                         continue;
2091                 }
2092                 SCTP_TCB_LOCK(stcb);
2093                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2094                 if (stcb->asoc.my_vtag == vtag) {
2095                         /* candidate */
2096                         if (stcb->rport != rport) {
2097                                 SCTP_TCB_UNLOCK(stcb);
2098                                 continue;
2099                         }
2100                         if (stcb->sctp_ep->sctp_lport != lport) {
2101                                 SCTP_TCB_UNLOCK(stcb);
2102                                 continue;
2103                         }
2104                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2105                                 SCTP_TCB_UNLOCK(stcb);
2106                                 continue;
2107                         }
2108                         /* RRS:Need toaddr check here */
2109                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2110                                 /* Endpoint does not own this address */
2111                                 SCTP_TCB_UNLOCK(stcb);
2112                                 continue;
2113                         }
2114                         if (remote_tag) {
2115                                 /*
2116                                  * If we have both vtags that's all we match
2117                                  * on
2118                                  */
2119                                 if (stcb->asoc.peer_vtag == remote_tag) {
2120                                         /*
2121                                          * If both tags match we consider it
2122                                          * conclusive and check NO
2123                                          * source/destination addresses
2124                                          */
2125                                         goto conclusive;
2126                                 }
2127                         }
2128                         if (skip_src_check) {
2129                 conclusive:
2130                                 if (from) {
2131                                         net = sctp_findnet(stcb, from);
2132                                 } else {
2133                                         *netp = NULL;   /* unknown */
2134                                 }
2135                                 if (inp_p)
2136                                         *inp_p = stcb->sctp_ep;
2137                                 SCTP_INP_INFO_RUNLOCK();
2138                                 return (stcb);
2139                         }
2140                         net = sctp_findnet(stcb, from);
2141                         if (net) {
2142                                 /* yep its him. */
2143                                 *netp = net;
2144                                 SCTP_STAT_INCR(sctps_vtagexpress);
2145                                 *inp_p = stcb->sctp_ep;
2146                                 SCTP_INP_INFO_RUNLOCK();
2147                                 return (stcb);
2148                         } else {
2149                                 /*
2150                                  * not him, this should only happen in rare
2151                                  * cases so I peg it.
2152                                  */
2153                                 SCTP_STAT_INCR(sctps_vtagbogus);
2154                         }
2155                 }
2156                 SCTP_TCB_UNLOCK(stcb);
2157         }
2158         SCTP_INP_INFO_RUNLOCK();
2159         return (NULL);
2160 }
2161
2162 /*
2163  * Find an association with the pointer to the inbound IP packet. This can be
2164  * a IPv4 or IPv6 packet.
2165  */
2166 struct sctp_tcb *
2167 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2168     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2169     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2170 {
2171         int find_tcp_pool;
2172         struct ip *iph;
2173         struct sctp_tcb *retval;
2174         struct sockaddr_storage to_store, from_store;
2175         struct sockaddr *to = (struct sockaddr *)&to_store;
2176         struct sockaddr *from = (struct sockaddr *)&from_store;
2177         struct sctp_inpcb *inp;
2178
2179         iph = mtod(m, struct ip *);
2180         switch (iph->ip_v) {
2181 #ifdef INET
2182         case IPVERSION:
2183                 {
2184                         /* its IPv4 */
2185                         struct sockaddr_in *from4;
2186
2187                         from4 = (struct sockaddr_in *)&from_store;
2188                         bzero(from4, sizeof(*from4));
2189                         from4->sin_family = AF_INET;
2190                         from4->sin_len = sizeof(struct sockaddr_in);
2191                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2192                         from4->sin_port = sh->src_port;
2193                         break;
2194                 }
2195 #endif
2196 #ifdef INET6
2197         case IPV6_VERSION >> 4:
2198                 {
2199                         /* its IPv6 */
2200                         struct ip6_hdr *ip6;
2201                         struct sockaddr_in6 *from6;
2202
2203                         ip6 = mtod(m, struct ip6_hdr *);
2204                         from6 = (struct sockaddr_in6 *)&from_store;
2205                         bzero(from6, sizeof(*from6));
2206                         from6->sin6_family = AF_INET6;
2207                         from6->sin6_len = sizeof(struct sockaddr_in6);
2208                         from6->sin6_addr = ip6->ip6_src;
2209                         from6->sin6_port = sh->src_port;
2210                         /* Get the scopes in properly to the sin6 addr's */
2211                         /* we probably don't need these operations */
2212                         (void)sa6_recoverscope(from6);
2213                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2214                         break;
2215                 }
2216 #endif
2217         default:
2218                 /* Currently not supported. */
2219                 return (NULL);
2220         }
2221
2222
2223         switch (iph->ip_v) {
2224 #ifdef INET
2225         case IPVERSION:
2226                 {
2227                         /* its IPv4 */
2228                         struct sockaddr_in *to4;
2229
2230                         to4 = (struct sockaddr_in *)&to_store;
2231                         bzero(to4, sizeof(*to4));
2232                         to4->sin_family = AF_INET;
2233                         to4->sin_len = sizeof(struct sockaddr_in);
2234                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2235                         to4->sin_port = sh->dest_port;
2236                         break;
2237                 }
2238 #endif
2239 #ifdef INET6
2240         case IPV6_VERSION >> 4:
2241                 {
2242                         /* its IPv6 */
2243                         struct ip6_hdr *ip6;
2244                         struct sockaddr_in6 *to6;
2245
2246                         ip6 = mtod(m, struct ip6_hdr *);
2247                         to6 = (struct sockaddr_in6 *)&to_store;
2248                         bzero(to6, sizeof(*to6));
2249                         to6->sin6_family = AF_INET6;
2250                         to6->sin6_len = sizeof(struct sockaddr_in6);
2251                         to6->sin6_addr = ip6->ip6_dst;
2252                         to6->sin6_port = sh->dest_port;
2253                         /* Get the scopes in properly to the sin6 addr's */
2254                         /* we probably don't need these operations */
2255                         (void)sa6_recoverscope(to6);
2256                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2257                         break;
2258                 }
2259 #endif
2260         default:
2261                 /* TSNH */
2262                 break;
2263         }
2264         if (sh->v_tag) {
2265                 /* we only go down this path if vtag is non-zero */
2266                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2267                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2268                 if (retval) {
2269                         return (retval);
2270                 }
2271         }
2272         find_tcp_pool = 0;
2273         if ((ch->chunk_type != SCTP_INITIATION) &&
2274             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2275             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2276             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2277                 /* Other chunk types go to the tcp pool. */
2278                 find_tcp_pool = 1;
2279         }
2280         if (inp_p) {
2281                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2282                     find_tcp_pool, vrf_id);
2283                 inp = *inp_p;
2284         } else {
2285                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2286                     find_tcp_pool, vrf_id);
2287         }
2288         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2289         if (retval == NULL && inp) {
2290                 /* Found a EP but not this address */
2291                 if ((ch->chunk_type == SCTP_INITIATION) ||
2292                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2293                         /*-
2294                          * special hook, we do NOT return linp or an
2295                          * association that is linked to an existing
2296                          * association that is under the TCP pool (i.e. no
2297                          * listener exists). The endpoint finding routine
2298                          * will always find a listener before examining the
2299                          * TCP pool.
2300                          */
2301                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2302                                 if (inp_p) {
2303                                         *inp_p = NULL;
2304                                 }
2305                                 return (NULL);
2306                         }
2307                         retval = sctp_findassociation_special_addr(m, iphlen,
2308                             offset, sh, &inp, netp, to);
2309                         if (inp_p != NULL) {
2310                                 *inp_p = inp;
2311                         }
2312                 }
2313         }
2314         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2315         return (retval);
2316 }
2317
2318 /*
2319  * lookup an association by an ASCONF lookup address.
2320  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2321  */
2322 struct sctp_tcb *
2323 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2324     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2325 {
2326         struct sctp_tcb *stcb;
2327         struct sockaddr_storage local_store, remote_store;
2328         struct sockaddr *to;
2329         struct ip *iph;
2330         struct sctp_paramhdr parm_buf, *phdr;
2331         int ptype;
2332         int zero_address = 0;
2333
2334 #ifdef INET
2335         struct sockaddr_in *sin;
2336
2337 #endif
2338 #ifdef INET6
2339         struct ip6_hdr *ip6;
2340         struct sockaddr_in6 *sin6;
2341
2342 #endif
2343
2344         memset(&local_store, 0, sizeof(local_store));
2345         memset(&remote_store, 0, sizeof(remote_store));
2346         to = (struct sockaddr *)&local_store;
2347         /* First get the destination address setup too. */
2348         iph = mtod(m, struct ip *);
2349         switch (iph->ip_v) {
2350 #ifdef INET
2351         case IPVERSION:
2352                 /* its IPv4 */
2353                 sin = (struct sockaddr_in *)&local_store;
2354                 sin->sin_family = AF_INET;
2355                 sin->sin_len = sizeof(*sin);
2356                 sin->sin_port = sh->dest_port;
2357                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2358                 break;
2359 #endif
2360 #ifdef INET6
2361         case IPV6_VERSION >> 4:
2362                 /* its IPv6 */
2363                 ip6 = mtod(m, struct ip6_hdr *);
2364                 sin6 = (struct sockaddr_in6 *)&local_store;
2365                 sin6->sin6_family = AF_INET6;
2366                 sin6->sin6_len = sizeof(*sin6);
2367                 sin6->sin6_port = sh->dest_port;
2368                 sin6->sin6_addr = ip6->ip6_dst;
2369                 break;
2370 #endif
2371         default:
2372                 return NULL;
2373         }
2374
2375         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2376             &parm_buf, sizeof(struct sctp_paramhdr));
2377         if (phdr == NULL) {
2378                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2379                     __FUNCTION__);
2380                 return NULL;
2381         }
2382         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2383         /* get the correlation address */
2384         switch (ptype) {
2385 #ifdef INET6
2386         case SCTP_IPV6_ADDRESS:
2387                 {
2388                         /* ipv6 address param */
2389                         struct sctp_ipv6addr_param *p6, p6_buf;
2390
2391                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2392                                 return NULL;
2393                         }
2394                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2395                             offset + sizeof(struct sctp_asconf_chunk),
2396                             &p6_buf.ph, sizeof(*p6));
2397                         if (p6 == NULL) {
2398                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2399                                     __FUNCTION__);
2400                                 return (NULL);
2401                         }
2402                         sin6 = (struct sockaddr_in6 *)&remote_store;
2403                         sin6->sin6_family = AF_INET6;
2404                         sin6->sin6_len = sizeof(*sin6);
2405                         sin6->sin6_port = sh->src_port;
2406                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2407                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2408                                 zero_address = 1;
2409                         break;
2410                 }
2411 #endif
2412 #ifdef INET
2413         case SCTP_IPV4_ADDRESS:
2414                 {
2415                         /* ipv4 address param */
2416                         struct sctp_ipv4addr_param *p4, p4_buf;
2417
2418                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2419                                 return NULL;
2420                         }
2421                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2422                             offset + sizeof(struct sctp_asconf_chunk),
2423                             &p4_buf.ph, sizeof(*p4));
2424                         if (p4 == NULL) {
2425                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2426                                     __FUNCTION__);
2427                                 return (NULL);
2428                         }
2429                         sin = (struct sockaddr_in *)&remote_store;
2430                         sin->sin_family = AF_INET;
2431                         sin->sin_len = sizeof(*sin);
2432                         sin->sin_port = sh->src_port;
2433                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2434                         if (sin->sin_addr.s_addr == INADDR_ANY)
2435                                 zero_address = 1;
2436                         break;
2437                 }
2438 #endif
2439         default:
2440                 /* invalid address param type */
2441                 return NULL;
2442         }
2443
2444         if (zero_address) {
2445                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2446                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2447                 /*
2448                  * printf("findassociation_ep_asconf: zero lookup address
2449                  * finds stcb 0x%x\n", (uint32_t)stcb);
2450                  */
2451         } else {
2452                 stcb = sctp_findassociation_ep_addr(inp_p,
2453                     (struct sockaddr *)&remote_store, netp,
2454                     to, NULL);
2455         }
2456         return (stcb);
2457 }
2458
2459
2460 /*
2461  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2462  * addresses. This way if we don't get a bind we by default pick a ephemeral
2463  * port with all addresses bound.
2464  */
2465 int
2466 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2467 {
2468         /*
2469          * we get called when a new endpoint starts up. We need to allocate
2470          * the sctp_inpcb structure from the zone and init it. Mark it as
2471          * unbound and find a port that we can use as an ephemeral with
2472          * INADDR_ANY. If the user binds later no problem we can then add in
2473          * the specific addresses. And setup the default parameters for the
2474          * EP.
2475          */
2476         int i, error;
2477         struct sctp_inpcb *inp;
2478         struct sctp_pcb *m;
2479         struct timeval time;
2480         sctp_sharedkey_t *null_key;
2481
2482         error = 0;
2483
2484         SCTP_INP_INFO_WLOCK();
2485         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2486         if (inp == NULL) {
2487                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2488                 SCTP_INP_INFO_WUNLOCK();
2489                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2490                 return (ENOBUFS);
2491         }
2492         /* zap it */
2493         bzero(inp, sizeof(*inp));
2494
2495         /* bump generations */
2496         /* setup socket pointers */
2497         inp->sctp_socket = so;
2498         inp->ip_inp.inp.inp_socket = so;
2499 #ifdef INET6
2500         if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2501                 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2502         }
2503 #endif
2504         inp->sctp_associd_counter = 1;
2505         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2506         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2507         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2508         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2509         /* init the small hash table we use to track asocid <-> tcb */
2510         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2511         if (inp->sctp_asocidhash == NULL) {
2512                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2513                 SCTP_INP_INFO_WUNLOCK();
2514                 return (ENOBUFS);
2515         }
2516 #ifdef IPSEC
2517         {
2518                 struct inpcbpolicy *pcb_sp = NULL;
2519
2520                 error = ipsec_init_policy(so, &pcb_sp);
2521                 /* Arrange to share the policy */
2522                 inp->ip_inp.inp.inp_sp = pcb_sp;
2523                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2524         }
2525         if (error != 0) {
2526                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2527                 SCTP_INP_INFO_WUNLOCK();
2528                 return error;
2529         }
2530 #endif                          /* IPSEC */
2531         SCTP_INCR_EP_COUNT();
2532         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2533         SCTP_INP_INFO_WUNLOCK();
2534
2535         so->so_pcb = (caddr_t)inp;
2536
2537         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2538                 /* UDP style socket */
2539                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2540                     SCTP_PCB_FLAGS_UNBOUND);
2541                 /* Be sure it is NON-BLOCKING IO for UDP */
2542                 /* SCTP_SET_SO_NBIO(so); */
2543         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2544                 /* TCP style socket */
2545                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2546                     SCTP_PCB_FLAGS_UNBOUND);
2547                 /* Be sure we have blocking IO by default */
2548                 SCTP_CLEAR_SO_NBIO(so);
2549         } else {
2550                 /*
2551                  * unsupported socket type (RAW, etc)- in case we missed it
2552                  * in protosw
2553                  */
2554                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2555                 so->so_pcb = NULL;
2556                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2557                 return (EOPNOTSUPP);
2558         }
2559         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2560                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2561                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2562         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2563                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2564                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2565         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2566                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2567                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2568         }
2569         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2570             &inp->sctp_hashmark);
2571         if (inp->sctp_tcbhash == NULL) {
2572                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2573                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2574                 so->so_pcb = NULL;
2575                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2576                 return (ENOBUFS);
2577         }
2578         inp->def_vrf_id = vrf_id;
2579
2580         SCTP_INP_INFO_WLOCK();
2581         SCTP_INP_LOCK_INIT(inp);
2582         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2583         SCTP_INP_READ_INIT(inp);
2584         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2585         /* lock the new ep */
2586         SCTP_INP_WLOCK(inp);
2587
2588         /* add it to the info area */
2589         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2590         SCTP_INP_INFO_WUNLOCK();
2591
2592         TAILQ_INIT(&inp->read_queue);
2593         LIST_INIT(&inp->sctp_addr_list);
2594
2595         LIST_INIT(&inp->sctp_asoc_list);
2596
2597 #ifdef SCTP_TRACK_FREED_ASOCS
2598         /* TEMP CODE */
2599         LIST_INIT(&inp->sctp_asoc_free_list);
2600 #endif
2601         /* Init the timer structure for signature change */
2602         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2603         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2604
2605         /* now init the actual endpoint default data */
2606         m = &inp->sctp_ep;
2607
2608         /* setup the base timeout information */
2609         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2610         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2611         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2612         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2613         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2614         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2615         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2616         /* all max/min max are in ms */
2617         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2618         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2619         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2620         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2621         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2622
2623         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2624
2625         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2626         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2627         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2628         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2629         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2630         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2631         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2632         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2633
2634         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2635         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2636         /* number of streams to pre-open on a association */
2637         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2638
2639         /* Add adaptation cookie */
2640         m->adaptation_layer_indicator = 0x504C5253;
2641
2642         /* seed random number generator */
2643         m->random_counter = 1;
2644         m->store_at = SCTP_SIGNATURE_SIZE;
2645         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2646         sctp_fill_random_store(m);
2647
2648         /* Minimum cookie size */
2649         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2650             sizeof(struct sctp_state_cookie);
2651         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2652
2653         /* Setup the initial secret */
2654         (void)SCTP_GETTIME_TIMEVAL(&time);
2655         m->time_of_secret_change = time.tv_sec;
2656
2657         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2658                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2659         }
2660         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2661
2662         /* How long is a cookie good for ? */
2663         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2664         /*
2665          * Initialize authentication parameters
2666          */
2667         m->local_hmacs = sctp_default_supported_hmaclist();
2668         m->local_auth_chunks = sctp_alloc_chunklist();
2669         m->default_dscp = 0;
2670 #ifdef INET6
2671         m->default_flowlabel = 0;
2672 #endif
2673         sctp_auth_set_default_chunks(m->local_auth_chunks);
2674         LIST_INIT(&m->shared_keys);
2675         /* add default NULL key as key id 0 */
2676         null_key = sctp_alloc_sharedkey();
2677         sctp_insert_sharedkey(&m->shared_keys, null_key);
2678         SCTP_INP_WUNLOCK(inp);
2679 #ifdef SCTP_LOG_CLOSING
2680         sctp_log_closing(inp, NULL, 12);
2681 #endif
2682         return (error);
2683 }
2684
2685
2686 void
2687 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2688     struct sctp_tcb *stcb)
2689 {
2690         struct sctp_nets *net;
2691         uint16_t lport, rport;
2692         struct sctppcbhead *head;
2693         struct sctp_laddr *laddr, *oladdr;
2694
2695         atomic_add_int(&stcb->asoc.refcnt, 1);
2696         SCTP_TCB_UNLOCK(stcb);
2697         SCTP_INP_INFO_WLOCK();
2698         SCTP_INP_WLOCK(old_inp);
2699         SCTP_INP_WLOCK(new_inp);
2700         SCTP_TCB_LOCK(stcb);
2701         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2702
2703         new_inp->sctp_ep.time_of_secret_change =
2704             old_inp->sctp_ep.time_of_secret_change;
2705         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2706             sizeof(old_inp->sctp_ep.secret_key));
2707         new_inp->sctp_ep.current_secret_number =
2708             old_inp->sctp_ep.current_secret_number;
2709         new_inp->sctp_ep.last_secret_number =
2710             old_inp->sctp_ep.last_secret_number;
2711         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2712
2713         /* make it so new data pours into the new socket */
2714         stcb->sctp_socket = new_inp->sctp_socket;
2715         stcb->sctp_ep = new_inp;
2716
2717         /* Copy the port across */
2718         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2719         rport = stcb->rport;
2720         /* Pull the tcb from the old association */
2721         LIST_REMOVE(stcb, sctp_tcbhash);
2722         LIST_REMOVE(stcb, sctp_tcblist);
2723         if (stcb->asoc.in_asocid_hash) {
2724                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2725         }
2726         /* Now insert the new_inp into the TCP connected hash */
2727         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2728
2729         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2730         /* Its safe to access */
2731         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2732
2733         /* Now move the tcb into the endpoint list */
2734         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2735         /*
2736          * Question, do we even need to worry about the ep-hash since we
2737          * only have one connection? Probably not :> so lets get rid of it
2738          * and not suck up any kernel memory in that.
2739          */
2740         if (stcb->asoc.in_asocid_hash) {
2741                 struct sctpasochead *lhd;
2742
2743                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2744                     new_inp->hashasocidmark)];
2745                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2746         }
2747         /* Ok. Let's restart timer. */
2748         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2749                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2750                     stcb, net);
2751         }
2752
2753         SCTP_INP_INFO_WUNLOCK();
2754         if (new_inp->sctp_tcbhash != NULL) {
2755                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2756                 new_inp->sctp_tcbhash = NULL;
2757         }
2758         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2759                 /* Subset bound, so copy in the laddr list from the old_inp */
2760                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2761                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2762                         if (laddr == NULL) {
2763                                 /*
2764                                  * Gak, what can we do? This assoc is really
2765                                  * HOSED. We probably should send an abort
2766                                  * here.
2767                                  */
2768                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2769                                 continue;
2770                         }
2771                         SCTP_INCR_LADDR_COUNT();
2772                         bzero(laddr, sizeof(*laddr));
2773                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2774                         laddr->ifa = oladdr->ifa;
2775                         atomic_add_int(&laddr->ifa->refcount, 1);
2776                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2777                             sctp_nxt_addr);
2778                         new_inp->laddr_count++;
2779                         if (oladdr == stcb->asoc.last_used_address) {
2780                                 stcb->asoc.last_used_address = laddr;
2781                         }
2782                 }
2783         }
2784         /*
2785          * Now any running timers need to be adjusted since we really don't
2786          * care if they are running or not just blast in the new_inp into
2787          * all of them.
2788          */
2789
2790         stcb->asoc.dack_timer.ep = (void *)new_inp;
2791         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2792         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2793         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2794         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2795         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2796         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2797         /* now what about the nets? */
2798         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2799                 net->pmtu_timer.ep = (void *)new_inp;
2800                 net->hb_timer.ep = (void *)new_inp;
2801                 net->rxt_timer.ep = (void *)new_inp;
2802         }
2803         SCTP_INP_WUNLOCK(new_inp);
2804         SCTP_INP_WUNLOCK(old_inp);
2805 }
2806
2807
2808
2809
2810 /* sctp_ifap is used to bypass normal local address validation checks */
2811 int
2812 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2813     struct sctp_ifa *sctp_ifap, struct thread *p)
2814 {
2815         /* bind a ep to a socket address */
2816         struct sctppcbhead *head;
2817         struct sctp_inpcb *inp, *inp_tmp;
2818         struct inpcb *ip_inp;
2819         int port_reuse_active = 0;
2820         int bindall;
2821         uint16_t lport;
2822         int error;
2823         uint32_t vrf_id;
2824
2825         lport = 0;
2826         error = 0;
2827         bindall = 1;
2828         inp = (struct sctp_inpcb *)so->so_pcb;
2829         ip_inp = (struct inpcb *)so->so_pcb;
2830 #ifdef SCTP_DEBUG
2831         if (addr) {
2832                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2833                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2834                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2835                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2836         }
2837 #endif
2838         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2839                 /* already did a bind, subsequent binds NOT allowed ! */
2840                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2841                 return (EINVAL);
2842         }
2843 #ifdef INVARIANTS
2844         if (p == NULL)
2845                 panic("null proc/thread");
2846 #endif
2847         if (addr != NULL) {
2848                 switch (addr->sa_family) {
2849 #ifdef INET
2850                 case AF_INET:
2851                         {
2852                                 struct sockaddr_in *sin;
2853
2854                                 /* IPV6_V6ONLY socket? */
2855                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2856                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2857                                         return (EINVAL);
2858                                 }
2859                                 if (addr->sa_len != sizeof(*sin)) {
2860                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2861                                         return (EINVAL);
2862                                 }
2863                                 sin = (struct sockaddr_in *)addr;
2864                                 lport = sin->sin_port;
2865                                 /*
2866                                  * For LOOPBACK the prison_local_ip4() call
2867                                  * will transmute the ip address to the
2868                                  * proper value.
2869                                  */
2870                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2871                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2872                                         return (error);
2873                                 }
2874                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2875                                         bindall = 0;
2876                                 }
2877                                 break;
2878                         }
2879 #endif
2880 #ifdef INET6
2881                 case AF_INET6:
2882                         {
2883                                 /*
2884                                  * Only for pure IPv6 Address. (No IPv4
2885                                  * Mapped!)
2886                                  */
2887                                 struct sockaddr_in6 *sin6;
2888
2889                                 sin6 = (struct sockaddr_in6 *)addr;
2890
2891                                 if (addr->sa_len != sizeof(*sin6)) {
2892                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2893                                         return (EINVAL);
2894                                 }
2895                                 lport = sin6->sin6_port;
2896
2897                                 /*
2898                                  * For LOOPBACK the prison_local_ip6() call
2899                                  * will transmute the ipv6 address to the
2900                                  * proper value.
2901                                  */
2902                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2903                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2904                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2905                                         return (error);
2906                                 }
2907                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2908                                         bindall = 0;
2909                                         /* KAME hack: embed scopeid */
2910                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2911                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2912                                                 return (EINVAL);
2913                                         }
2914                                 }
2915                                 /* this must be cleared for ifa_ifwithaddr() */
2916                                 sin6->sin6_scope_id = 0;
2917                                 break;
2918                         }
2919 #endif
2920                 default:
2921                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2922                         return (EAFNOSUPPORT);
2923                 }
2924         }
2925         SCTP_INP_INFO_WLOCK();
2926         SCTP_INP_WLOCK(inp);
2927         /* Setup a vrf_id to be the default for the non-bind-all case. */
2928         vrf_id = inp->def_vrf_id;
2929
2930         /* increase our count due to the unlock we do */
2931         SCTP_INP_INCR_REF(inp);
2932         if (lport) {
2933                 /*
2934                  * Did the caller specify a port? if so we must see if a ep
2935                  * already has this one bound.
2936                  */
2937                 /* got to be root to get at low ports */
2938                 if (ntohs(lport) < IPPORT_RESERVED) {
2939                         if (p && (error =
2940                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2941                             )) {
2942                                 SCTP_INP_DECR_REF(inp);
2943                                 SCTP_INP_WUNLOCK(inp);
2944                                 SCTP_INP_INFO_WUNLOCK();
2945                                 return (error);
2946                         }
2947                 }
2948                 if (p == NULL) {
2949                         SCTP_INP_DECR_REF(inp);
2950                         SCTP_INP_WUNLOCK(inp);
2951                         SCTP_INP_INFO_WUNLOCK();
2952                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2953                         return (error);
2954                 }
2955                 SCTP_INP_WUNLOCK(inp);
2956                 if (bindall) {
2957                         vrf_id = inp->def_vrf_id;
2958                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2959                         if (inp_tmp != NULL) {
2960                                 /*
2961                                  * lock guy returned and lower count note
2962                                  * that we are not bound so inp_tmp should
2963                                  * NEVER be inp. And it is this inp
2964                                  * (inp_tmp) that gets the reference bump,
2965                                  * so we must lower it.
2966                                  */
2967                                 SCTP_INP_DECR_REF(inp_tmp);
2968                                 /* unlock info */
2969                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2970                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2971                                         /*
2972                                          * Ok, must be one-2-one and
2973                                          * allowing port re-use
2974                                          */
2975                                         port_reuse_active = 1;
2976                                         goto continue_anyway;
2977                                 }
2978                                 SCTP_INP_DECR_REF(inp);
2979                                 SCTP_INP_INFO_WUNLOCK();
2980                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2981                                 return (EADDRINUSE);
2982                         }
2983                 } else {
2984                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2985                         if (inp_tmp != NULL) {
2986                                 /*
2987                                  * lock guy returned and lower count note
2988                                  * that we are not bound so inp_tmp should
2989                                  * NEVER be inp. And it is this inp
2990                                  * (inp_tmp) that gets the reference bump,
2991                                  * so we must lower it.
2992                                  */
2993                                 SCTP_INP_DECR_REF(inp_tmp);
2994                                 /* unlock info */
2995                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2996                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2997                                         /*
2998                                          * Ok, must be one-2-one and
2999                                          * allowing port re-use
3000                                          */
3001                                         port_reuse_active = 1;
3002                                         goto continue_anyway;
3003                                 }
3004                                 SCTP_INP_DECR_REF(inp);
3005                                 SCTP_INP_INFO_WUNLOCK();
3006                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3007                                 return (EADDRINUSE);
3008                         }
3009                 }
3010 continue_anyway:
3011                 SCTP_INP_WLOCK(inp);
3012                 if (bindall) {
3013                         /* verify that no lport is not used by a singleton */
3014                         if ((port_reuse_active == 0) &&
3015                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
3016                             ) {
3017                                 /* Sorry someone already has this one bound */
3018                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3019                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3020                                         port_reuse_active = 1;
3021                                 } else {
3022                                         SCTP_INP_DECR_REF(inp);
3023                                         SCTP_INP_WUNLOCK(inp);
3024                                         SCTP_INP_INFO_WUNLOCK();
3025                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3026                                         return (EADDRINUSE);
3027                                 }
3028                         }
3029                 }
3030         } else {
3031                 uint16_t first, last, candidate;
3032                 uint16_t count;
3033                 int done;
3034
3035                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3036                         first = MODULE_GLOBAL(ipport_hifirstauto);
3037                         last = MODULE_GLOBAL(ipport_hilastauto);
3038                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3039                         if (p && (error =
3040                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3041                             )) {
3042                                 SCTP_INP_DECR_REF(inp);
3043                                 SCTP_INP_WUNLOCK(inp);
3044                                 SCTP_INP_INFO_WUNLOCK();
3045                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3046                                 return (error);
3047                         }
3048                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3049                         last = MODULE_GLOBAL(ipport_lowlastauto);
3050                 } else {
3051                         first = MODULE_GLOBAL(ipport_firstauto);
3052                         last = MODULE_GLOBAL(ipport_lastauto);
3053                 }
3054                 if (first > last) {
3055                         uint16_t temp;
3056
3057                         temp = first;
3058                         first = last;
3059                         last = temp;
3060                 }
3061                 count = last - first + 1;       /* number of candidates */
3062                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3063
3064                 done = 0;
3065                 while (!done) {
3066                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3067                                 done = 1;
3068                         }
3069                         if (!done) {
3070                                 if (--count == 0) {
3071                                         SCTP_INP_DECR_REF(inp);
3072                                         SCTP_INP_WUNLOCK(inp);
3073                                         SCTP_INP_INFO_WUNLOCK();
3074                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3075                                         return (EADDRINUSE);
3076                                 }
3077                                 if (candidate == last)
3078                                         candidate = first;
3079                                 else
3080                                         candidate = candidate + 1;
3081                         }
3082                 }
3083                 lport = htons(candidate);
3084         }
3085         SCTP_INP_DECR_REF(inp);
3086         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3087             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3088                 /*
3089                  * this really should not happen. The guy did a non-blocking
3090                  * bind and then did a close at the same time.
3091                  */
3092                 SCTP_INP_WUNLOCK(inp);
3093                 SCTP_INP_INFO_WUNLOCK();
3094                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3095                 return (EINVAL);
3096         }
3097         /* ok we look clear to give out this port, so lets setup the binding */
3098         if (bindall) {
3099                 /* binding to all addresses, so just set in the proper flags */
3100                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3101                 /* set the automatic addr changes from kernel flag */
3102                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3103                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3104                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3105                 } else {
3106                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3107                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3108                 }
3109                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3110                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3111                 } else {
3112                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3113                 }
3114                 /*
3115                  * set the automatic mobility_base from kernel flag (by
3116                  * micchie)
3117                  */
3118                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3119                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3120                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3121                 } else {
3122                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3123                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3124                 }
3125                 /*
3126                  * set the automatic mobility_fasthandoff from kernel flag
3127                  * (by micchie)
3128                  */
3129                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3130                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3131                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3132                 } else {
3133                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3134                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3135                 }
3136         } else {
3137                 /*
3138                  * bind specific, make sure flags is off and add a new
3139                  * address structure to the sctp_addr_list inside the ep
3140                  * structure.
3141                  *
3142                  * We will need to allocate one and insert it at the head. The
3143                  * socketopt call can just insert new addresses in there as
3144                  * well. It will also have to do the embed scope kame hack
3145                  * too (before adding).
3146                  */
3147                 struct sctp_ifa *ifa;
3148                 struct sockaddr_storage store_sa;
3149
3150                 memset(&store_sa, 0, sizeof(store_sa));
3151                 switch (addr->sa_family) {
3152                 case AF_INET:
3153                         {
3154                                 struct sockaddr_in *sin;
3155
3156                                 sin = (struct sockaddr_in *)&store_sa;
3157                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3158                                 sin->sin_port = 0;
3159                                 break;
3160                         }
3161                 case AF_INET6:
3162                         {
3163                                 struct sockaddr_in6 *sin6;
3164
3165                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3166                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3167                                 sin6->sin6_port = 0;
3168                                 break;
3169                         }
3170                 default:
3171                         break;
3172                 }
3173                 /*
3174                  * first find the interface with the bound address need to
3175                  * zero out the port to find the address! yuck! can't do
3176                  * this earlier since need port for sctp_pcb_findep()
3177                  */
3178                 if (sctp_ifap != NULL)
3179                         ifa = sctp_ifap;
3180                 else {
3181                         /*
3182                          * Note for BSD we hit here always other O/S's will
3183                          * pass things in via the sctp_ifap argument
3184                          * (Panda).
3185                          */
3186                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3187                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3188                 }
3189                 if (ifa == NULL) {
3190                         /* Can't find an interface with that address */
3191                         SCTP_INP_WUNLOCK(inp);
3192                         SCTP_INP_INFO_WUNLOCK();
3193                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3194                         return (EADDRNOTAVAIL);
3195                 }
3196 #ifdef INET6
3197                 if (addr->sa_family == AF_INET6) {
3198                         /* GAK, more FIXME IFA lock? */
3199                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3200                                 /* Can't bind a non-existent addr. */
3201                                 SCTP_INP_WUNLOCK(inp);
3202                                 SCTP_INP_INFO_WUNLOCK();
3203                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3204                                 return (EINVAL);
3205                         }
3206                 }
3207 #endif
3208                 /* we're not bound all */
3209                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3210                 /* allow bindx() to send ASCONF's for binding changes */
3211                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3212                 /* clear automatic addr changes from kernel flag */
3213                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3214
3215                 /* add this address to the endpoint list */
3216                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3217                 if (error != 0) {
3218                         SCTP_INP_WUNLOCK(inp);
3219                         SCTP_INP_INFO_WUNLOCK();
3220                         return (error);
3221                 }
3222                 inp->laddr_count++;
3223         }
3224         /* find the bucket */
3225         if (port_reuse_active) {
3226                 /* Put it into tcp 1-2-1 hash */
3227                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3228                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3229         } else {
3230                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3231         }
3232         /* put it in the bucket */
3233         LIST_INSERT_HEAD(head, inp, sctp_hash);
3234         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3235             head, ntohs(lport), port_reuse_active);
3236         /* set in the port */
3237         inp->sctp_lport = lport;
3238
3239         /* turn off just the unbound flag */
3240         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3241         SCTP_INP_WUNLOCK(inp);
3242         SCTP_INP_INFO_WUNLOCK();
3243         return (0);
3244 }
3245
3246
3247 static void
3248 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3249 {
3250         struct sctp_iterator *it, *nit;
3251
3252         /*
3253          * We enter with the only the ITERATOR_LOCK in place and a write
3254          * lock on the inp_info stuff.
3255          */
3256         it = sctp_it_ctl.cur_it;
3257         if (it && (it->vn != curvnet)) {
3258                 /* Its not looking at our VNET */
3259                 return;
3260         }
3261         if (it && (it->inp == inp)) {
3262                 /*
3263                  * This is tricky and we hold the iterator lock, but when it
3264                  * returns and gets the lock (when we release it) the
3265                  * iterator will try to operate on inp. We need to stop that
3266                  * from happening. But of course the iterator has a
3267                  * reference on the stcb and inp. We can mark it and it will
3268                  * stop.
3269                  *
3270                  * If its a single iterator situation, we set the end iterator
3271                  * flag. Otherwise we set the iterator to go to the next
3272                  * inp.
3273                  *
3274                  */
3275                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3276                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3277                 } else {
3278                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3279                 }
3280         }
3281         /*
3282          * Now go through and remove any single reference to our inp that
3283          * may be still pending on the list
3284          */
3285         SCTP_IPI_ITERATOR_WQ_LOCK();
3286         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3287                 if (it->vn != curvnet) {
3288                         continue;
3289                 }
3290                 if (it->inp == inp) {
3291                         /* This one points to me is it inp specific? */
3292                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3293                                 /* Remove and free this one */
3294                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3295                                     it, sctp_nxt_itr);
3296                                 if (it->function_atend != NULL) {
3297                                         (*it->function_atend) (it->pointer, it->val);
3298                                 }
3299                                 SCTP_FREE(it, SCTP_M_ITER);
3300                         } else {
3301                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3302                                 if (it->inp) {
3303                                         SCTP_INP_INCR_REF(it->inp);
3304                                 }
3305                         }
3306                         /*
3307                          * When its put in the refcnt is incremented so decr
3308                          * it
3309                          */
3310                         SCTP_INP_DECR_REF(inp);
3311                 }
3312         }
3313         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3314 }
3315
3316 /* release sctp_inpcb unbind the port */
3317 void
3318 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3319 {
3320         /*
3321          * Here we free a endpoint. We must find it (if it is in the Hash
3322          * table) and remove it from there. Then we must also find it in the
3323          * overall list and remove it from there. After all removals are
3324          * complete then any timer has to be stopped. Then start the actual
3325          * freeing. a) Any local lists. b) Any associations. c) The hash of
3326          * all associations. d) finally the ep itself.
3327          */
3328         struct sctp_pcb *m;
3329         struct sctp_tcb *asoc, *nasoc;
3330         struct sctp_laddr *laddr, *nladdr;
3331         struct inpcb *ip_pcb;
3332         struct socket *so;
3333         int being_refed = 0;
3334         struct sctp_queued_to_read *sq, *nsq;
3335         int cnt;
3336         sctp_sharedkey_t *shared_key, *nshared_key;
3337
3338
3339 #ifdef SCTP_LOG_CLOSING
3340         sctp_log_closing(inp, NULL, 0);
3341 #endif
3342         SCTP_ITERATOR_LOCK();
3343         /* mark any iterators on the list or being processed */
3344         sctp_iterator_inp_being_freed(inp);
3345         SCTP_ITERATOR_UNLOCK();
3346         so = inp->sctp_socket;
3347         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3348                 /* been here before.. eeks.. get out of here */
3349                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3350 #ifdef SCTP_LOG_CLOSING
3351                 sctp_log_closing(inp, NULL, 1);
3352 #endif
3353                 return;
3354         }
3355         SCTP_ASOC_CREATE_LOCK(inp);
3356         SCTP_INP_INFO_WLOCK();
3357
3358         SCTP_INP_WLOCK(inp);
3359         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3360                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3361                 /* socket is gone, so no more wakeups allowed */
3362                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3363                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3364                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3365
3366         }
3367         /* First time through we have the socket lock, after that no more. */
3368         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3369             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3370
3371         if (inp->control) {
3372                 sctp_m_freem(inp->control);
3373                 inp->control = NULL;
3374         }
3375         if (inp->pkt) {
3376                 sctp_m_freem(inp->pkt);
3377                 inp->pkt = NULL;
3378         }
3379         m = &inp->sctp_ep;
3380         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3381                                          * here but I will be nice :> (i.e.
3382                                          * ip_pcb = ep;) */
3383         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3384                 int cnt_in_sd;
3385
3386                 cnt_in_sd = 0;
3387                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3388                         SCTP_TCB_LOCK(asoc);
3389                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3390                                 /* Skip guys being freed */
3391                                 cnt_in_sd++;
3392                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3393                                         /*
3394                                          * Special case - we did not start a
3395                                          * kill timer on the asoc due to it
3396                                          * was not closed. So go ahead and
3397                                          * start it now.
3398                                          */
3399                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3400                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3401                                 }
3402                                 SCTP_TCB_UNLOCK(asoc);
3403                                 continue;
3404                         }
3405                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3406                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3407                             (asoc->asoc.total_output_queue_size == 0)) {
3408                                 /*
3409                                  * If we have data in queue, we don't want
3410                                  * to just free since the app may have done,
3411                                  * send()/close or connect/send/close. And
3412                                  * it wants the data to get across first.
3413                                  */
3414                                 /* Just abandon things in the front states */
3415                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3416                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3417                                         cnt_in_sd++;
3418                                 }
3419                                 continue;
3420                         }
3421                         /* Disconnect the socket please */
3422                         asoc->sctp_socket = NULL;
3423                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3424                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3425                             (asoc->asoc.control_pdapi) ||
3426                             (asoc->asoc.size_on_all_streams > 0) ||
3427                             (so && (so->so_rcv.sb_cc > 0))
3428                             ) {
3429                                 /* Left with Data unread */
3430                                 struct mbuf *op_err;
3431
3432                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3433                                     0, M_DONTWAIT, 1, MT_DATA);
3434                                 if (op_err) {
3435                                         /* Fill in the user initiated abort */
3436                                         struct sctp_paramhdr *ph;
3437                                         uint32_t *ippp;
3438
3439                                         SCTP_BUF_LEN(op_err) =
3440                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3441                                         ph = mtod(op_err,
3442                                             struct sctp_paramhdr *);
3443                                         ph->param_type = htons(
3444                                             SCTP_CAUSE_USER_INITIATED_ABT);
3445                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3446                                         ippp = (uint32_t *) (ph + 1);
3447                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3448                                 }
3449                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3450 #if defined(SCTP_PANIC_ON_ABORT)
3451                                 panic("inpcb_free does an abort");
3452 #endif
3453                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3454                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3455                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3456                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3457                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3458                                 }
3459                                 if (sctp_free_assoc(inp, asoc,
3460                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3461                                         cnt_in_sd++;
3462                                 }
3463                                 continue;
3464                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3465                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3466                                     (asoc->asoc.stream_queue_cnt == 0)
3467                             ) {
3468                                 if (asoc->asoc.locked_on_sending) {
3469                                         goto abort_anyway;
3470                                 }
3471                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3472                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3473                                         struct sctp_nets *netp;
3474
3475                                         if (asoc->asoc.alternate) {
3476                                                 netp = asoc->asoc.alternate;
3477                                         } else {
3478                                                 netp = asoc->asoc.primary_destination;
3479                                         }
3480                                         /*
3481                                          * there is nothing queued to send,
3482                                          * so I send shutdown
3483                                          */
3484                                         sctp_send_shutdown(asoc, netp);
3485                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3486                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3487                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3488                                         }
3489                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3490                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3491                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3492                                             netp);
3493                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3494                                             asoc->asoc.primary_destination);
3495                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3496                                 }
3497                         } else {
3498                                 /* mark into shutdown pending */
3499                                 struct sctp_stream_queue_pending *sp;
3500
3501                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3502                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3503                                     asoc->asoc.primary_destination);
3504                                 if (asoc->asoc.locked_on_sending) {
3505                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3506                                             sctp_streamhead);
3507                                         if (sp == NULL) {
3508                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3509                                                     asoc->asoc.locked_on_sending,
3510                                                     asoc->asoc.locked_on_sending->stream_no);
3511                                         } else {
3512                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3513                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3514                                         }
3515                                 }
3516                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3517                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3518                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3519                                         struct mbuf *op_err;
3520
3521                         abort_anyway:
3522                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3523                                             0, M_DONTWAIT, 1, MT_DATA);
3524                                         if (op_err) {
3525                                                 /*
3526                                                  * Fill in the user
3527                                                  * initiated abort
3528                                                  */
3529                                                 struct sctp_paramhdr *ph;
3530                                                 uint32_t *ippp;
3531
3532                                                 SCTP_BUF_LEN(op_err) =
3533                                                     (sizeof(struct sctp_paramhdr) +
3534                                                     sizeof(uint32_t));
3535                                                 ph = mtod(op_err,
3536                                                     struct sctp_paramhdr *);
3537                                                 ph->param_type = htons(
3538                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3539                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3540                                                 ippp = (uint32_t *) (ph + 1);
3541                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3542                                         }
3543                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3544 #if defined(SCTP_PANIC_ON_ABORT)
3545                                         panic("inpcb_free does an abort");
3546 #endif
3547
3548                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3549                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3550                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3551                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3552                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3553                                         }
3554                                         if (sctp_free_assoc(inp, asoc,
3555                                             SCTP_PCBFREE_NOFORCE,
3556                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3557                                                 cnt_in_sd++;
3558                                         }
3559                                         continue;
3560                                 } else {
3561                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3562                                 }
3563                         }
3564                         cnt_in_sd++;
3565                         SCTP_TCB_UNLOCK(asoc);
3566                 }
3567                 /* now is there some left in our SHUTDOWN state? */
3568                 if (cnt_in_sd) {
3569 #ifdef SCTP_LOG_CLOSING
3570                         sctp_log_closing(inp, NULL, 2);
3571 #endif
3572                         inp->sctp_socket = NULL;
3573                         SCTP_INP_WUNLOCK(inp);
3574                         SCTP_ASOC_CREATE_UNLOCK(inp);
3575                         SCTP_INP_INFO_WUNLOCK();
3576                         return;
3577                 }
3578         }
3579         inp->sctp_socket = NULL;
3580         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3581             SCTP_PCB_FLAGS_UNBOUND) {
3582                 /*
3583                  * ok, this guy has been bound. It's port is somewhere in
3584                  * the SCTP_BASE_INFO(hash table). Remove it!
3585                  */
3586                 LIST_REMOVE(inp, sctp_hash);
3587                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3588         }
3589         /*
3590          * If there is a timer running to kill us, forget it, since it may
3591          * have a contest on the INP lock.. which would cause us to die ...
3592          */
3593         cnt = 0;
3594         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3595                 SCTP_TCB_LOCK(asoc);
3596                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3597                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3598                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3599                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3600                         }
3601                         cnt++;
3602                         SCTP_TCB_UNLOCK(asoc);
3603                         continue;
3604                 }
3605                 /* Free associations that are NOT killing us */
3606                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3607                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3608                         struct mbuf *op_err;
3609                         uint32_t *ippp;
3610
3611                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3612                             0, M_DONTWAIT, 1, MT_DATA);
3613                         if (op_err) {
3614                                 /* Fill in the user initiated abort */
3615                                 struct sctp_paramhdr *ph;
3616
3617                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3618                                     sizeof(uint32_t));
3619                                 ph = mtod(op_err, struct sctp_paramhdr *);
3620                                 ph->param_type = htons(
3621                                     SCTP_CAUSE_USER_INITIATED_ABT);
3622                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3623                                 ippp = (uint32_t *) (ph + 1);
3624                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3625
3626                         }
3627                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3628 #if defined(SCTP_PANIC_ON_ABORT)
3629                         panic("inpcb_free does an abort");
3630 #endif
3631                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3632                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3633                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3634                         cnt++;
3635                         SCTP_TCB_UNLOCK(asoc);
3636                         continue;
3637                 }
3638                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3639                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3640                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3641                 }
3642                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3643                         cnt++;
3644                 }
3645         }
3646         if (cnt) {
3647                 /* Ok we have someone out there that will kill us */
3648                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3649 #ifdef SCTP_LOG_CLOSING
3650                 sctp_log_closing(inp, NULL, 3);
3651 #endif
3652                 SCTP_INP_WUNLOCK(inp);
3653                 SCTP_ASOC_CREATE_UNLOCK(inp);
3654                 SCTP_INP_INFO_WUNLOCK();
3655                 return;
3656         }
3657         if (SCTP_INP_LOCK_CONTENDED(inp))
3658                 being_refed++;
3659         if (SCTP_INP_READ_CONTENDED(inp))
3660                 being_refed++;
3661         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3662                 being_refed++;
3663
3664         if ((inp->refcount) ||
3665             (being_refed) ||
3666             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3667                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3668 #ifdef SCTP_LOG_CLOSING
3669                 sctp_log_closing(inp, NULL, 4);
3670 #endif
3671                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3672                 SCTP_INP_WUNLOCK(inp);
3673                 SCTP_ASOC_CREATE_UNLOCK(inp);
3674                 SCTP_INP_INFO_WUNLOCK();
3675                 return;
3676         }
3677         inp->sctp_ep.signature_change.type = 0;
3678         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3679         /*
3680          * Remove it from the list .. last thing we need a lock for.
3681          */
3682         LIST_REMOVE(inp, sctp_list);
3683         SCTP_INP_WUNLOCK(inp);
3684         SCTP_ASOC_CREATE_UNLOCK(inp);
3685         SCTP_INP_INFO_WUNLOCK();
3686         /*
3687          * Now we release all locks. Since this INP cannot be found anymore
3688          * except possibly by the kill timer that might be running. We call
3689          * the drain function here. It should hit the case were it sees the
3690          * ACTIVE flag cleared and exit out freeing us to proceed and
3691          * destroy everything.
3692          */
3693         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3694                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3695         } else {
3696                 /* Probably un-needed */
3697                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3698         }
3699
3700 #ifdef SCTP_LOG_CLOSING
3701         sctp_log_closing(inp, NULL, 5);
3702 #endif
3703
3704
3705         if ((inp->sctp_asocidhash) != NULL) {
3706                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3707                 inp->sctp_asocidhash = NULL;
3708         }
3709         /* sa_ignore FREED_MEMORY */
3710         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3711                 /* Its only abandoned if it had data left */
3712                 if (sq->length)
3713                         SCTP_STAT_INCR(sctps_left_abandon);
3714
3715                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3716                 sctp_free_remote_addr(sq->whoFrom);
3717                 if (so)
3718                         so->so_rcv.sb_cc -= sq->length;
3719                 if (sq->data) {
3720                         sctp_m_freem(sq->data);
3721                         sq->data = NULL;
3722                 }
3723                 /*
3724                  * no need to free the net count, since at this point all
3725                  * assoc's are gone.
3726                  */
3727                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3728                 SCTP_DECR_READQ_COUNT();
3729         }
3730         /* Now the sctp_pcb things */
3731         /*
3732          * free each asoc if it is not already closed/free. we can't use the
3733          * macro here since le_next will get freed as part of the
3734          * sctp_free_assoc() call.
3735          */
3736         cnt = 0;
3737         if (so) {
3738 #ifdef IPSEC
3739                 ipsec_delete_pcbpolicy(ip_pcb);
3740 #endif                          /* IPSEC */
3741
3742                 /* Unlocks not needed since the socket is gone now */
3743         }
3744         if (ip_pcb->inp_options) {
3745                 (void)sctp_m_free(ip_pcb->inp_options);
3746                 ip_pcb->inp_options = 0;
3747         }
3748 #ifdef INET6
3749         if (ip_pcb->inp_vflag & INP_IPV6) {
3750                 struct in6pcb *in6p;
3751
3752                 in6p = (struct in6pcb *)inp;
3753                 ip6_freepcbopts(in6p->in6p_outputopts);
3754         }
3755 #endif                          /* INET6 */
3756         ip_pcb->inp_vflag = 0;
3757         /* free up authentication fields */
3758         if (inp->sctp_ep.local_auth_chunks != NULL)
3759                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3760         if (inp->sctp_ep.local_hmacs != NULL)
3761                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3762
3763         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3764                 LIST_REMOVE(shared_key, next);
3765                 sctp_free_sharedkey(shared_key);
3766                 /* sa_ignore FREED_MEMORY */
3767         }
3768
3769         /*
3770          * if we have an address list the following will free the list of
3771          * ifaddr's that are set into this ep. Again macro limitations here,
3772          * since the LIST_FOREACH could be a bad idea.
3773          */
3774         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3775                 sctp_remove_laddr(laddr);
3776         }
3777
3778 #ifdef SCTP_TRACK_FREED_ASOCS
3779         /* TEMP CODE */
3780         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3781                 LIST_REMOVE(asoc, sctp_tcblist);
3782                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3783                 SCTP_DECR_ASOC_COUNT();
3784         }
3785         /* *** END TEMP CODE *** */
3786 #endif
3787         /* Now lets see about freeing the EP hash table. */
3788         if (inp->sctp_tcbhash != NULL) {
3789                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3790                 inp->sctp_tcbhash = NULL;
3791         }
3792         /* Now we must put the ep memory back into the zone pool */
3793         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3794         SCTP_INP_LOCK_DESTROY(inp);
3795         SCTP_INP_READ_DESTROY(inp);
3796         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3797         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3798         SCTP_DECR_EP_COUNT();
3799 }
3800
3801
3802 struct sctp_nets *
3803 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3804 {
3805         struct sctp_nets *net;
3806
3807         /* locate the address */
3808         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3809                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3810                         return (net);
3811         }
3812         return (NULL);
3813 }
3814
3815
3816 int
3817 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3818 {
3819         struct sctp_ifa *sctp_ifa;
3820
3821         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3822         if (sctp_ifa) {
3823                 return (1);
3824         } else {
3825                 return (0);
3826         }
3827 }
3828
3829 /*
3830  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3831  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3832  * stats of stuff.
3833  */
3834 int
3835 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3836     struct sctp_nets **netp, int set_scope, int from)
3837 {
3838         /*
3839          * The following is redundant to the same lines in the
3840          * sctp_aloc_assoc() but is needed since others call the add address
3841          * function
3842          */
3843         struct sctp_nets *net, *netfirst;
3844         int addr_inscope;
3845
3846         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3847             from);
3848         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3849
3850         netfirst = sctp_findnet(stcb, newaddr);
3851         if (netfirst) {
3852                 /*
3853                  * Lie and return ok, we don't want to make the association
3854                  * go away for this behavior. It will happen in the TCP
3855                  * model in a connected socket. It does not reach the hash
3856                  * table until after the association is built so it can't be
3857                  * found. Mark as reachable, since the initial creation will
3858                  * have been cleared and the NOT_IN_ASSOC flag will have
3859                  * been added... and we don't want to end up removing it
3860                  * back out.
3861                  */
3862                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3863                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3864                             SCTP_ADDR_UNCONFIRMED);
3865                 } else {
3866                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3867                 }
3868
3869                 return (0);
3870         }
3871         addr_inscope = 1;
3872         switch (newaddr->sa_family) {
3873 #ifdef INET
3874         case AF_INET:
3875                 {
3876                         struct sockaddr_in *sin;
3877
3878                         sin = (struct sockaddr_in *)newaddr;
3879                         if (sin->sin_addr.s_addr == 0) {
3880                                 /* Invalid address */
3881                                 return (-1);
3882                         }
3883                         /* zero out the bzero area */
3884                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3885
3886                         /* assure len is set */
3887                         sin->sin_len = sizeof(struct sockaddr_in);
3888                         if (set_scope) {
3889 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3890                                 stcb->ipv4_local_scope = 1;
3891 #else
3892                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3893                                         stcb->asoc.ipv4_local_scope = 1;
3894                                 }
3895 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3896                         } else {
3897                                 /* Validate the address is in scope */
3898                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3899                                     (stcb->asoc.ipv4_local_scope == 0)) {
3900                                         addr_inscope = 0;
3901                                 }
3902                         }
3903                         break;
3904                 }
3905 #endif
3906 #ifdef INET6
3907         case AF_INET6:
3908                 {
3909                         struct sockaddr_in6 *sin6;
3910
3911                         sin6 = (struct sockaddr_in6 *)newaddr;
3912                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3913                                 /* Invalid address */
3914                                 return (-1);
3915                         }
3916                         /* assure len is set */
3917                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3918                         if (set_scope) {
3919                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3920                                         stcb->asoc.loopback_scope = 1;
3921                                         stcb->asoc.local_scope = 0;
3922                                         stcb->asoc.ipv4_local_scope = 1;
3923                                         stcb->asoc.site_scope = 1;
3924                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3925                                         /*
3926                                          * If the new destination is a
3927                                          * LINK_LOCAL we must have common
3928                                          * site scope. Don't set the local
3929                                          * scope since we may not share all
3930                                          * links, only loopback can do this.
3931                                          * Links on the local network would
3932                                          * also be on our private network
3933                                          * for v4 too.
3934                                          */
3935                                         stcb->asoc.ipv4_local_scope = 1;
3936                                         stcb->asoc.site_scope = 1;
3937                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3938                                         /*
3939                                          * If the new destination is
3940                                          * SITE_LOCAL then we must have site
3941                                          * scope in common.
3942                                          */
3943                                         stcb->asoc.site_scope = 1;
3944                                 }
3945                         } else {
3946                                 /* Validate the address is in scope */
3947                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3948                                     (stcb->asoc.loopback_scope == 0)) {
3949                                         addr_inscope = 0;
3950                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3951                                     (stcb->asoc.local_scope == 0)) {
3952                                         addr_inscope = 0;
3953                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3954                                     (stcb->asoc.site_scope == 0)) {
3955                                         addr_inscope = 0;
3956                                 }
3957                         }
3958                         break;
3959                 }
3960 #endif
3961         default:
3962                 /* not supported family type */
3963                 return (-1);
3964         }
3965         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3966         if (net == NULL) {
3967                 return (-1);
3968         }
3969         SCTP_INCR_RADDR_COUNT();
3970         bzero(net, sizeof(struct sctp_nets));
3971         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3972         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3973         switch (newaddr->sa_family) {
3974 #ifdef INET
3975         case AF_INET:
3976                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3977                 break;
3978 #endif
3979 #ifdef INET6
3980         case AF_INET6:
3981                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3982                 break;
3983 #endif
3984         default:
3985                 break;
3986         }
3987         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3988         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3989                 stcb->asoc.loopback_scope = 1;
3990                 stcb->asoc.ipv4_local_scope = 1;
3991                 stcb->asoc.local_scope = 0;
3992                 stcb->asoc.site_scope = 1;
3993                 addr_inscope = 1;
3994         }
3995         net->failure_threshold = stcb->asoc.def_net_failure;
3996         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3997         if (addr_inscope == 0) {
3998                 net->dest_state = (SCTP_ADDR_REACHABLE |
3999                     SCTP_ADDR_OUT_OF_SCOPE);
4000         } else {
4001                 if (from == SCTP_ADDR_IS_CONFIRMED)
4002                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
4003                         net->dest_state = SCTP_ADDR_REACHABLE;
4004                 else
4005                         net->dest_state = SCTP_ADDR_REACHABLE |
4006                             SCTP_ADDR_UNCONFIRMED;
4007         }
4008         /*
4009          * We set this to 0, the timer code knows that this means its an
4010          * initial value
4011          */
4012         net->rto_needed = 1;
4013         net->RTO = 0;
4014         net->RTO_measured = 0;
4015         stcb->asoc.numnets++;
4016         *(&net->ref_count) = 1;
4017         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
4018         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
4019                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4020         } else {
4021                 net->port = 0;
4022         }
4023         net->dscp = stcb->asoc.default_dscp;
4024 #ifdef INET6
4025         net->flowlabel = stcb->asoc.default_flowlabel;
4026 #endif
4027         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
4028                 net->dest_state |= SCTP_ADDR_NOHB;
4029         } else {
4030                 net->dest_state &= ~SCTP_ADDR_NOHB;
4031         }
4032         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
4033                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
4034         } else {
4035                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
4036         }
4037         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
4038         /* Init the timer structure */
4039         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4040         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4041         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
4042
4043         /* Now generate a route for this guy */
4044 #ifdef INET6
4045         /* KAME hack: embed scopeid */
4046         if (newaddr->sa_family == AF_INET6) {
4047                 struct sockaddr_in6 *sin6;
4048
4049                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4050                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4051                 sin6->sin6_scope_id = 0;
4052         }
4053 #endif
4054         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
4055
4056         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4057                 /* Get source address */
4058                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4059                     stcb,
4060                     (sctp_route_t *) & net->ro,
4061                     net,
4062                     0,
4063                     stcb->asoc.vrf_id);
4064                 /* Now get the interface MTU */
4065                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4066                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4067                 }
4068                 if (net->mtu > 0) {
4069                         uint32_t rmtu;
4070
4071                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4072                         if (rmtu == 0) {
4073                                 /*
4074                                  * Start things off to match mtu of
4075                                  * interface please.
4076                                  */
4077                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4078                                     net->ro.ro_rt, net->mtu);
4079                         } else {
4080                                 /*
4081                                  * we take the route mtu over the interface,
4082                                  * since the route may be leading out the
4083                                  * loopback, or a different interface.
4084                                  */
4085                                 net->mtu = rmtu;
4086                         }
4087                 }
4088         }
4089         if (net->mtu == 0) {
4090                 switch (newaddr->sa_family) {
4091 #ifdef INET
4092                 case AF_INET:
4093                         net->mtu = SCTP_DEFAULT_MTU;
4094                         break;
4095 #endif
4096 #ifdef INET6
4097                 case AF_INET6:
4098                         net->mtu = 1280;
4099                         break;
4100 #endif
4101                 default:
4102                         break;
4103                 }
4104         }
4105         if (net->port) {
4106                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4107         }
4108         if (from == SCTP_ALLOC_ASOC) {
4109                 stcb->asoc.smallest_mtu = net->mtu;
4110         }
4111         if (stcb->asoc.smallest_mtu > net->mtu) {
4112                 stcb->asoc.smallest_mtu = net->mtu;
4113         }
4114 #ifdef INET6
4115         if (newaddr->sa_family == AF_INET6) {
4116                 struct sockaddr_in6 *sin6;
4117
4118                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4119                 (void)sa6_recoverscope(sin6);
4120         }
4121 #endif
4122
4123         /* JRS - Use the congestion control given in the CC module */
4124         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4125                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4126
4127         /*
4128          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4129          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4130          */
4131         net->find_pseudo_cumack = 1;
4132         net->find_rtx_pseudo_cumack = 1;
4133         net->src_addr_selected = 0;
4134         /* Choose an initial flowid. */
4135         net->flowid = stcb->asoc.my_vtag ^
4136             ntohs(stcb->rport) ^
4137             ntohs(stcb->sctp_ep->sctp_lport);
4138 #ifdef INVARIANTS
4139         net->flowidset = 1;
4140 #endif
4141         if (netp) {
4142                 *netp = net;
4143         }
4144         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4145         if (net->ro.ro_rt == NULL) {
4146                 /* Since we have no route put it at the back */
4147                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4148         } else if (netfirst == NULL) {
4149                 /* We are the first one in the pool. */
4150                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4151         } else if (netfirst->ro.ro_rt == NULL) {
4152                 /*
4153                  * First one has NO route. Place this one ahead of the first
4154                  * one.
4155                  */
4156                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4157         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4158                 /*
4159                  * This one has a different interface than the one at the
4160                  * top of the list. Place it ahead.
4161                  */
4162                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4163         } else {
4164                 /*
4165                  * Ok we have the same interface as the first one. Move
4166                  * forward until we find either a) one with a NULL route...
4167                  * insert ahead of that b) one with a different ifp.. insert
4168                  * after that. c) end of the list.. insert at the tail.
4169                  */
4170                 struct sctp_nets *netlook;
4171
4172                 do {
4173                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4174                         if (netlook == NULL) {
4175                                 /* End of the list */
4176                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4177                                 break;
4178                         } else if (netlook->ro.ro_rt == NULL) {
4179                                 /* next one has NO route */
4180                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4181                                 break;
4182                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4183                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4184                                     net, sctp_next);
4185                                 break;
4186                         }
4187                         /* Shift forward */
4188                         netfirst = netlook;
4189                 } while (netlook != NULL);
4190         }
4191
4192         /* got to have a primary set */
4193         if (stcb->asoc.primary_destination == 0) {
4194                 stcb->asoc.primary_destination = net;
4195         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4196                     (net->ro.ro_rt) &&
4197             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4198                 /* No route to current primary adopt new primary */
4199                 stcb->asoc.primary_destination = net;
4200         }
4201         /* Validate primary is first */
4202         net = TAILQ_FIRST(&stcb->asoc.nets);
4203         if ((net != stcb->asoc.primary_destination) &&
4204             (stcb->asoc.primary_destination)) {
4205                 /*
4206                  * first one on the list is NOT the primary sctp_cmpaddr()
4207                  * is much more efficient if the primary is the first on the
4208                  * list, make it so.
4209                  */
4210                 TAILQ_REMOVE(&stcb->asoc.nets,
4211                     stcb->asoc.primary_destination, sctp_next);
4212                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4213                     stcb->asoc.primary_destination, sctp_next);
4214         }
4215         return (0);
4216 }
4217
4218
4219 static uint32_t
4220 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4221 {
4222         uint32_t id;
4223         struct sctpasochead *head;
4224         struct sctp_tcb *lstcb;
4225
4226         SCTP_INP_WLOCK(inp);
4227 try_again:
4228         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4229                 /* TSNH */
4230                 SCTP_INP_WUNLOCK(inp);
4231                 return (0);
4232         }
4233         /*
4234          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4235          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4236          */
4237         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4238                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4239         }
4240         id = inp->sctp_associd_counter;
4241         inp->sctp_associd_counter++;
4242         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4243         if (lstcb) {
4244                 goto try_again;
4245         }
4246         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4247         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4248         stcb->asoc.in_asocid_hash = 1;
4249         SCTP_INP_WUNLOCK(inp);
4250         return id;
4251 }
4252
4253 /*
4254  * allocate an association and add it to the endpoint. The caller must be
4255  * careful to add all additional addresses once they are know right away or
4256  * else the assoc will be may experience a blackout scenario.
4257  */
4258 struct sctp_tcb *
4259 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4260     int *error, uint32_t override_tag, uint32_t vrf_id,
4261     struct thread *p
4262 )
4263 {
4264         /* note the p argument is only valid in unbound sockets */
4265
4266         struct sctp_tcb *stcb;
4267         struct sctp_association *asoc;
4268         struct sctpasochead *head;
4269         uint16_t rport;
4270         int err;
4271
4272         /*
4273          * Assumption made here: Caller has done a
4274          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4275          * address does not exist already.
4276          */
4277         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4278                 /* Hit max assoc, sorry no more */
4279                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4280                 *error = ENOBUFS;
4281                 return (NULL);
4282         }
4283         if (firstaddr == NULL) {
4284                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4285                 *error = EINVAL;
4286                 return (NULL);
4287         }
4288         SCTP_INP_RLOCK(inp);
4289         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4290             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4291             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4292                 /*
4293                  * If its in the TCP pool, its NOT allowed to create an
4294                  * association. The parent listener needs to call
4295                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4296                  * off, or connected one does this.. its an error.
4297                  */
4298                 SCTP_INP_RUNLOCK(inp);
4299                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4300                 *error = EINVAL;
4301                 return (NULL);
4302         }
4303         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4304             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4305                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4306                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4307                         SCTP_INP_RUNLOCK(inp);
4308                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4309                         *error = EINVAL;
4310                         return (NULL);
4311                 }
4312         }
4313         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4314 #ifdef SCTP_DEBUG
4315         if (firstaddr) {
4316                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4317                 switch (firstaddr->sa_family) {
4318 #ifdef INET
4319                 case AF_INET:
4320                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4321                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4322                         break;
4323 #endif
4324 #ifdef INET6
4325                 case AF_INET6:
4326                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4327                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4328                         break;
4329 #endif
4330                 default:
4331                         break;
4332                 }
4333         } else {
4334                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4335         }
4336 #endif                          /* SCTP_DEBUG */
4337         switch (firstaddr->sa_family) {
4338 #ifdef INET
4339         case AF_INET:
4340                 {
4341                         struct sockaddr_in *sin;
4342
4343                         sin = (struct sockaddr_in *)firstaddr;
4344                         if ((ntohs(sin->sin_port) == 0) ||
4345                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4346                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4347                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4348                                 /* Invalid address */
4349                                 SCTP_INP_RUNLOCK(inp);
4350                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4351                                 *error = EINVAL;
4352                                 return (NULL);
4353                         }
4354                         rport = sin->sin_port;
4355                         break;
4356                 }
4357 #endif
4358 #ifdef INET6
4359         case AF_INET6:
4360                 {
4361                         struct sockaddr_in6 *sin6;
4362
4363                         sin6 = (struct sockaddr_in6 *)firstaddr;
4364                         if ((ntohs(sin6->sin6_port) == 0) ||
4365                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4366                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4367                                 /* Invalid address */
4368                                 SCTP_INP_RUNLOCK(inp);
4369                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4370                                 *error = EINVAL;
4371                                 return (NULL);
4372                         }
4373                         rport = sin6->sin6_port;
4374                         break;
4375                 }
4376 #endif
4377         default:
4378                 /* not supported family type */
4379                 SCTP_INP_RUNLOCK(inp);
4380                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4381                 *error = EINVAL;
4382                 return (NULL);
4383         }
4384         SCTP_INP_RUNLOCK(inp);
4385         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4386                 /*
4387                  * If you have not performed a bind, then we need to do the
4388                  * ephemeral bind for you.
4389                  */
4390                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4391                     (struct sockaddr *)NULL,
4392                     (struct sctp_ifa *)NULL,
4393                     p
4394                     ))) {
4395                         /* bind error, probably perm */
4396                         *error = err;
4397                         return (NULL);
4398                 }
4399         }
4400         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4401         if (stcb == NULL) {
4402                 /* out of memory? */
4403                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4404                 *error = ENOMEM;
4405                 return (NULL);
4406         }
4407         SCTP_INCR_ASOC_COUNT();
4408
4409         bzero(stcb, sizeof(*stcb));
4410         asoc = &stcb->asoc;
4411
4412         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4413         SCTP_TCB_LOCK_INIT(stcb);
4414         SCTP_TCB_SEND_LOCK_INIT(stcb);
4415         stcb->rport = rport;
4416         /* setup back pointer's */
4417         stcb->sctp_ep = inp;
4418         stcb->sctp_socket = inp->sctp_socket;
4419         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4420                 /* failed */
4421                 SCTP_TCB_LOCK_DESTROY(stcb);
4422                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4423                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4424                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4425                 SCTP_DECR_ASOC_COUNT();
4426                 *error = err;
4427                 return (NULL);
4428         }
4429         /* and the port */
4430         SCTP_INP_INFO_WLOCK();
4431         SCTP_INP_WLOCK(inp);
4432         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4433                 /* inpcb freed while alloc going on */
4434                 SCTP_TCB_LOCK_DESTROY(stcb);
4435                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4436                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4437                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4438                 SCTP_INP_WUNLOCK(inp);
4439                 SCTP_INP_INFO_WUNLOCK();
4440                 SCTP_DECR_ASOC_COUNT();
4441                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4442                 *error = EINVAL;
4443                 return (NULL);
4444         }
4445         SCTP_TCB_LOCK(stcb);
4446
4447         /* now that my_vtag is set, add it to the hash */
4448         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4449         /* put it in the bucket in the vtag hash of assoc's for the system */
4450         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4451         SCTP_INP_INFO_WUNLOCK();
4452
4453         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4454                 /* failure.. memory error? */
4455                 if (asoc->strmout) {
4456                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4457                         asoc->strmout = NULL;
4458                 }
4459                 if (asoc->mapping_array) {
4460                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4461                         asoc->mapping_array = NULL;
4462                 }
4463                 if (asoc->nr_mapping_array) {
4464                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4465                         asoc->nr_mapping_array = NULL;
4466                 }
4467                 SCTP_DECR_ASOC_COUNT();
4468                 SCTP_TCB_LOCK_DESTROY(stcb);
4469                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4470                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4471                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4472                 SCTP_INP_WUNLOCK(inp);
4473                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4474                 *error = ENOBUFS;
4475                 return (NULL);
4476         }
4477         /* Init all the timers */
4478         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4479         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4480         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4481         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4482         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4483         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4484         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4485
4486         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4487         /* now file the port under the hash as well */
4488         if (inp->sctp_tcbhash != NULL) {
4489                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4490                     inp->sctp_hashmark)];
4491                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4492         }
4493         SCTP_INP_WUNLOCK(inp);
4494         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4495         return (stcb);
4496 }
4497
4498
4499 void
4500 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4501 {
4502         struct sctp_association *asoc;
4503
4504         asoc = &stcb->asoc;
4505         asoc->numnets--;
4506         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4507         if (net == asoc->primary_destination) {
4508                 /* Reset primary */
4509                 struct sctp_nets *lnet;
4510
4511                 lnet = TAILQ_FIRST(&asoc->nets);
4512                 /*
4513                  * Mobility adaptation Ideally, if deleted destination is
4514                  * the primary, it becomes a fast retransmission trigger by
4515                  * the subsequent SET PRIMARY. (by micchie)
4516                  */
4517                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4518                     SCTP_MOBILITY_BASE) ||
4519                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4520                     SCTP_MOBILITY_FASTHANDOFF)) {
4521                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4522                         if (asoc->deleted_primary != NULL) {
4523                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4524                                 goto out;
4525                         }
4526                         asoc->deleted_primary = net;
4527                         atomic_add_int(&net->ref_count, 1);
4528                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4529                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4530                         sctp_mobility_feature_on(stcb->sctp_ep,
4531                             SCTP_MOBILITY_PRIM_DELETED);
4532                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4533                             stcb->sctp_ep, stcb, NULL);
4534                 }
4535 out:
4536                 /* Try to find a confirmed primary */
4537                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4538         }
4539         if (net == asoc->last_data_chunk_from) {
4540                 /* Reset primary */
4541                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4542         }
4543         if (net == asoc->last_control_chunk_from) {
4544                 /* Clear net */
4545                 asoc->last_control_chunk_from = NULL;
4546         }
4547         if (net == stcb->asoc.alternate) {
4548                 sctp_free_remote_addr(stcb->asoc.alternate);
4549                 stcb->asoc.alternate = NULL;
4550         }
4551         sctp_free_remote_addr(net);
4552 }
4553
4554 /*
4555  * remove a remote endpoint address from an association, it will fail if the
4556  * address does not exist.
4557  */
4558 int
4559 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4560 {
4561         /*
4562          * Here we need to remove a remote address. This is quite simple, we
4563          * first find it in the list of address for the association
4564          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4565          * on that item. Note we do not allow it to be removed if there are
4566          * no other addresses.
4567          */
4568         struct sctp_association *asoc;
4569         struct sctp_nets *net, *nnet;
4570
4571         asoc = &stcb->asoc;
4572
4573         /* locate the address */
4574         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4575                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4576                         continue;
4577                 }
4578                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4579                     remaddr)) {
4580                         /* we found the guy */
4581                         if (asoc->numnets < 2) {
4582                                 /* Must have at LEAST two remote addresses */
4583                                 return (-1);
4584                         } else {
4585                                 sctp_remove_net(stcb, net);
4586                                 return (0);
4587                         }
4588                 }
4589         }
4590         /* not found. */
4591         return (-2);
4592 }
4593
4594 void
4595 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4596 {
4597         struct sctpvtaghead *chain;
4598         struct sctp_tagblock *twait_block;
4599         int found = 0;
4600         int i;
4601
4602         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4603         if (!LIST_EMPTY(chain)) {
4604                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4605                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4606                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4607                                     (twait_block->vtag_block[i].lport == lport) &&
4608                                     (twait_block->vtag_block[i].rport == rport)) {
4609                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4610                                         twait_block->vtag_block[i].v_tag = 0;
4611                                         twait_block->vtag_block[i].lport = 0;
4612                                         twait_block->vtag_block[i].rport = 0;
4613                                         found = 1;
4614                                         break;
4615                                 }
4616                         }
4617                         if (found)
4618                                 break;
4619                 }
4620         }
4621 }
4622
4623 int
4624 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4625 {
4626         struct sctpvtaghead *chain;
4627         struct sctp_tagblock *twait_block;
4628         int found = 0;
4629         int i;
4630
4631         SCTP_INP_INFO_WLOCK();
4632         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4633         if (!LIST_EMPTY(chain)) {
4634                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4635                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4636                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4637                                     (twait_block->vtag_block[i].lport == lport) &&
4638                                     (twait_block->vtag_block[i].rport == rport)) {
4639                                         found = 1;
4640                                         break;
4641                                 }
4642                         }
4643                         if (found)
4644                                 break;
4645                 }
4646         }
4647         SCTP_INP_INFO_WUNLOCK();
4648         return (found);
4649 }
4650
4651
4652 void
4653 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4654 {
4655         struct sctpvtaghead *chain;
4656         struct sctp_tagblock *twait_block;
4657         struct timeval now;
4658         int set, i;
4659
4660         if (time == 0) {
4661                 /* Its disabled */
4662                 return;
4663         }
4664         (void)SCTP_GETTIME_TIMEVAL(&now);
4665         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4666         set = 0;
4667         if (!LIST_EMPTY(chain)) {
4668                 /* Block(s) present, lets find space, and expire on the fly */
4669                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4670                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4671                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4672                                     !set) {
4673                                         twait_block->vtag_block[i].tv_sec_at_expire =
4674                                             now.tv_sec + time;
4675                                         twait_block->vtag_block[i].v_tag = tag;
4676                                         twait_block->vtag_block[i].lport = lport;
4677                                         twait_block->vtag_block[i].rport = rport;
4678                                         set = 1;
4679                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4680                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4681                                         /* Audit expires this guy */
4682                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4683                                         twait_block->vtag_block[i].v_tag = 0;
4684                                         twait_block->vtag_block[i].lport = 0;
4685                                         twait_block->vtag_block[i].rport = 0;
4686                                         if (set == 0) {
4687                                                 /* Reuse it for my new tag */
4688                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4689                                                 twait_block->vtag_block[i].v_tag = tag;
4690                                                 twait_block->vtag_block[i].lport = lport;
4691                                                 twait_block->vtag_block[i].rport = rport;
4692                                                 set = 1;
4693                                         }
4694                                 }
4695                         }
4696                         if (set) {
4697                                 /*
4698                                  * We only do up to the block where we can
4699                                  * place our tag for audits
4700                                  */
4701                                 break;
4702                         }
4703                 }
4704         }
4705         /* Need to add a new block to chain */
4706         if (!set) {
4707                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4708                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4709                 if (twait_block == NULL) {
4710 #ifdef INVARIANTS
4711                         panic("Can not alloc tagblock");
4712 #endif
4713                         return;
4714                 }
4715                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4716                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4717                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4718                 twait_block->vtag_block[0].v_tag = tag;
4719                 twait_block->vtag_block[0].lport = lport;
4720                 twait_block->vtag_block[0].rport = rport;
4721         }
4722 }
4723
4724
4725
4726 /*-
4727  * Free the association after un-hashing the remote port. This
4728  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4729  * expect that the input to this function IS a locked TCB.
4730  * It will return 0, if it did NOT destroy the association (instead
4731  * it unlocks it. It will return NON-zero if it either destroyed the
4732  * association OR the association is already destroyed.
4733  */
4734 int
4735 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4736 {
4737         int i;
4738         struct sctp_association *asoc;
4739         struct sctp_nets *net, *nnet;
4740         struct sctp_laddr *laddr, *naddr;
4741         struct sctp_tmit_chunk *chk, *nchk;
4742         struct sctp_asconf_addr *aparam, *naparam;
4743         struct sctp_asconf_ack *aack, *naack;
4744         struct sctp_stream_reset_list *strrst, *nstrrst;
4745         struct sctp_queued_to_read *sq, *nsq;
4746         struct sctp_stream_queue_pending *sp, *nsp;
4747         sctp_sharedkey_t *shared_key, *nshared_key;
4748         struct socket *so;
4749
4750         /* first, lets purge the entry from the hash table. */
4751
4752 #ifdef SCTP_LOG_CLOSING
4753         sctp_log_closing(inp, stcb, 6);
4754 #endif
4755         if (stcb->asoc.state == 0) {
4756 #ifdef SCTP_LOG_CLOSING
4757                 sctp_log_closing(inp, NULL, 7);
4758 #endif
4759                 /* there is no asoc, really TSNH :-0 */
4760                 return (1);
4761         }
4762         if (stcb->asoc.alternate) {
4763                 sctp_free_remote_addr(stcb->asoc.alternate);
4764                 stcb->asoc.alternate = NULL;
4765         }
4766         /* TEMP CODE */
4767         if (stcb->freed_from_where == 0) {
4768                 /* Only record the first place free happened from */
4769                 stcb->freed_from_where = from_location;
4770         }
4771         /* TEMP CODE */
4772
4773         asoc = &stcb->asoc;
4774         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4775             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4776                 /* nothing around */
4777                 so = NULL;
4778         else
4779                 so = inp->sctp_socket;
4780
4781         /*
4782          * We used timer based freeing if a reader or writer is in the way.
4783          * So we first check if we are actually being called from a timer,
4784          * if so we abort early if a reader or writer is still in the way.
4785          */
4786         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4787             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4788                 /*
4789                  * is it the timer driving us? if so are the reader/writers
4790                  * gone?
4791                  */
4792                 if (stcb->asoc.refcnt) {
4793                         /* nope, reader or writer in the way */
4794                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4795                         /* no asoc destroyed */
4796                         SCTP_TCB_UNLOCK(stcb);
4797 #ifdef SCTP_LOG_CLOSING
4798                         sctp_log_closing(inp, stcb, 8);
4799 #endif
4800                         return (0);
4801                 }
4802         }
4803         /* now clean up any other timers */
4804         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4805         asoc->dack_timer.self = NULL;
4806         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4807         /*-
4808          * For stream reset we don't blast this unless
4809          * it is a str-reset timer, it might be the
4810          * free-asoc timer which we DON'T want to
4811          * disturb.
4812          */
4813         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4814                 asoc->strreset_timer.self = NULL;
4815         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4816         asoc->asconf_timer.self = NULL;
4817         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4818         asoc->autoclose_timer.self = NULL;
4819         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4820         asoc->shut_guard_timer.self = NULL;
4821         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4822         asoc->delayed_event_timer.self = NULL;
4823         /* Mobility adaptation */
4824         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4825         asoc->delete_prim_timer.self = NULL;
4826         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4827                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4828                 net->rxt_timer.self = NULL;
4829                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4830                 net->pmtu_timer.self = NULL;
4831                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4832                 net->hb_timer.self = NULL;
4833         }
4834         /* Now the read queue needs to be cleaned up (only once) */
4835         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4836                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4837                 SCTP_INP_READ_LOCK(inp);
4838                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4839                         if (sq->stcb == stcb) {
4840                                 sq->do_not_ref_stcb = 1;
4841                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4842                                 /*
4843                                  * If there is no end, there never will be
4844                                  * now.
4845                                  */
4846                                 if (sq->end_added == 0) {
4847                                         /* Held for PD-API clear that. */
4848                                         sq->pdapi_aborted = 1;
4849                                         sq->held_length = 0;
4850                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4851                                                 /*
4852                                                  * Need to add a PD-API
4853                                                  * aborted indication.
4854                                                  * Setting the control_pdapi
4855                                                  * assures that it will be
4856                                                  * added right after this
4857                                                  * msg.
4858                                                  */
4859                                                 uint32_t strseq;
4860
4861                                                 stcb->asoc.control_pdapi = sq;
4862                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4863                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4864                                                     stcb,
4865                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4866                                                     (void *)&strseq,
4867                                                     SCTP_SO_LOCKED);
4868                                                 stcb->asoc.control_pdapi = NULL;
4869                                         }
4870                                 }
4871                                 /* Add an end to wake them */
4872                                 sq->end_added = 1;
4873                         }
4874                 }
4875                 SCTP_INP_READ_UNLOCK(inp);
4876                 if (stcb->block_entry) {
4877                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4878                         stcb->block_entry->error = ECONNRESET;
4879                         stcb->block_entry = NULL;
4880                 }
4881         }
4882         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4883                 /*
4884                  * Someone holds a reference OR the socket is unaccepted
4885                  * yet.
4886                  */
4887                 if ((stcb->asoc.refcnt) ||
4888                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4889                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4890                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4891                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4892                 }
4893                 SCTP_TCB_UNLOCK(stcb);
4894                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4895                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4896                         /* nothing around */
4897                         so = NULL;
4898                 if (so) {
4899                         /* Wake any reader/writers */
4900                         sctp_sorwakeup(inp, so);
4901                         sctp_sowwakeup(inp, so);
4902                 }
4903 #ifdef SCTP_LOG_CLOSING
4904                 sctp_log_closing(inp, stcb, 9);
4905 #endif
4906                 /* no asoc destroyed */
4907                 return (0);
4908         }
4909 #ifdef SCTP_LOG_CLOSING
4910         sctp_log_closing(inp, stcb, 10);
4911 #endif
4912         /*
4913          * When I reach here, no others want to kill the assoc yet.. and I
4914          * own the lock. Now its possible an abort comes in when I do the
4915          * lock exchange below to grab all the locks to do the final take
4916          * out. to prevent this we increment the count, which will start a
4917          * timer and blow out above thus assuring us that we hold exclusive
4918          * killing of the asoc. Note that after getting back the TCB lock we
4919          * will go ahead and increment the counter back up and stop any
4920          * timer a passing stranger may have started :-S
4921          */
4922         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4923                 atomic_add_int(&stcb->asoc.refcnt, 1);
4924
4925                 SCTP_TCB_UNLOCK(stcb);
4926                 SCTP_INP_INFO_WLOCK();
4927                 SCTP_INP_WLOCK(inp);
4928                 SCTP_TCB_LOCK(stcb);
4929         }
4930         /* Double check the GONE flag */
4931         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4932             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4933                 /* nothing around */
4934                 so = NULL;
4935
4936         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4937             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4938                 /*
4939                  * For TCP type we need special handling when we are
4940                  * connected. We also include the peel'ed off ones to.
4941                  */
4942                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4943                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4944                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4945                         if (so) {
4946                                 SOCK_LOCK(so);
4947                                 if (so->so_rcv.sb_cc == 0) {
4948                                         so->so_state &= ~(SS_ISCONNECTING |
4949                                             SS_ISDISCONNECTING |
4950                                             SS_ISCONFIRMING |
4951                                             SS_ISCONNECTED);
4952                                 }
4953                                 socantrcvmore_locked(so);
4954                                 sctp_sowwakeup(inp, so);
4955                                 sctp_sorwakeup(inp, so);
4956                                 SCTP_SOWAKEUP(so);
4957                         }
4958                 }
4959         }
4960         /*
4961          * Make it invalid too, that way if its about to run it will abort
4962          * and return.
4963          */
4964         /* re-increment the lock */
4965         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4966                 atomic_add_int(&stcb->asoc.refcnt, -1);
4967         }
4968         if (stcb->asoc.refcnt) {
4969                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4970                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4971                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4972                         SCTP_INP_INFO_WUNLOCK();
4973                         SCTP_INP_WUNLOCK(inp);
4974                 }
4975                 SCTP_TCB_UNLOCK(stcb);
4976                 return (0);
4977         }
4978         asoc->state = 0;
4979         if (inp->sctp_tcbhash) {
4980                 LIST_REMOVE(stcb, sctp_tcbhash);
4981         }
4982         if (stcb->asoc.in_asocid_hash) {
4983                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4984         }
4985         /* Now lets remove it from the list of ALL associations in the EP */
4986         LIST_REMOVE(stcb, sctp_tcblist);
4987         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4988                 SCTP_INP_INCR_REF(inp);
4989                 SCTP_INP_WUNLOCK(inp);
4990         }
4991         /* pull from vtag hash */
4992         LIST_REMOVE(stcb, sctp_asocs);
4993         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4994             inp->sctp_lport, stcb->rport);
4995
4996         /*
4997          * Now restop the timers to be sure this is paranoia at is finest!
4998          */
4999         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5000         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
5001         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
5002         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
5003         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
5004         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
5005         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
5006         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5007                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
5008                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
5009                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
5010         }
5011
5012         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
5013         /*
5014          * The chunk lists and such SHOULD be empty but we check them just
5015          * in case.
5016          */
5017         /* anything on the wheel needs to be removed */
5018         for (i = 0; i < asoc->streamoutcnt; i++) {
5019                 struct sctp_stream_out *outs;
5020
5021                 outs = &asoc->strmout[i];
5022                 /* now clean up any chunks here */
5023                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
5024                         TAILQ_REMOVE(&outs->outqueue, sp, next);
5025                         if (sp->data) {
5026                                 if (so) {
5027                                         /* Still an open socket - report */
5028                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5029                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
5030                                             (void *)sp, SCTP_SO_LOCKED);
5031                                 }
5032                                 if (sp->data) {
5033                                         sctp_m_freem(sp->data);
5034                                         sp->data = NULL;
5035                                         sp->tail_mbuf = NULL;
5036                                 }
5037                         }
5038                         if (sp->net) {
5039                                 sctp_free_remote_addr(sp->net);
5040                                 sp->net = NULL;
5041                         }
5042                         sctp_free_spbufspace(stcb, asoc, sp);
5043                         if (sp->holds_key_ref)
5044                                 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED);
5045                         /* Free the zone stuff  */
5046                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
5047                         SCTP_DECR_STRMOQ_COUNT();
5048                         /* sa_ignore FREED_MEMORY */
5049                 }
5050         }
5051         /* sa_ignore FREED_MEMORY */
5052         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5053                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5054                 SCTP_FREE(strrst, SCTP_M_STRESET);
5055         }
5056         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5057                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5058                 if (sq->data) {
5059                         sctp_m_freem(sq->data);
5060                         sq->data = NULL;
5061                 }
5062                 sctp_free_remote_addr(sq->whoFrom);
5063                 sq->whoFrom = NULL;
5064                 sq->stcb = NULL;
5065                 /* Free the ctl entry */
5066                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5067                 SCTP_DECR_READQ_COUNT();
5068                 /* sa_ignore FREED_MEMORY */
5069         }
5070         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5071                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5072                 if (chk->data) {
5073                         sctp_m_freem(chk->data);
5074                         chk->data = NULL;
5075                 }
5076                 if (chk->holds_key_ref)
5077                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5078                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5079                 SCTP_DECR_CHK_COUNT();
5080                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5081                 asoc->free_chunk_cnt--;
5082                 /* sa_ignore FREED_MEMORY */
5083         }
5084         /* pending send queue SHOULD be empty */
5085         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5086                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5087                 if (chk->data) {
5088                         if (so) {
5089                                 /* Still a socket? */
5090                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5091                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
5092                         }
5093                         if (chk->data) {
5094                                 sctp_m_freem(chk->data);
5095                                 chk->data = NULL;
5096                         }
5097                 }
5098                 if (chk->holds_key_ref)
5099                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5100                 if (chk->whoTo) {
5101                         sctp_free_remote_addr(chk->whoTo);
5102                         chk->whoTo = NULL;
5103                 }
5104                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5105                 SCTP_DECR_CHK_COUNT();
5106                 /* sa_ignore FREED_MEMORY */
5107         }
5108         /* sent queue SHOULD be empty */
5109         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5110                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5111                 if (chk->data) {
5112                         if (so) {
5113                                 /* Still a socket? */
5114                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5115                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
5116                         }
5117                         if (chk->data) {
5118                                 sctp_m_freem(chk->data);
5119                                 chk->data = NULL;
5120                         }
5121                 }
5122                 if (chk->holds_key_ref)
5123                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5124                 sctp_free_remote_addr(chk->whoTo);
5125                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5126                 SCTP_DECR_CHK_COUNT();
5127                 /* sa_ignore FREED_MEMORY */
5128         }
5129         /* control queue MAY not be empty */
5130         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5131                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5132                 if (chk->data) {
5133                         sctp_m_freem(chk->data);
5134                         chk->data = NULL;
5135                 }
5136                 if (chk->holds_key_ref)
5137                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5138                 sctp_free_remote_addr(chk->whoTo);
5139                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5140                 SCTP_DECR_CHK_COUNT();
5141                 /* sa_ignore FREED_MEMORY */
5142         }
5143         /* ASCONF queue MAY not be empty */
5144         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5145                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5146                 if (chk->data) {
5147                         sctp_m_freem(chk->data);
5148                         chk->data = NULL;
5149                 }
5150                 if (chk->holds_key_ref)
5151                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5152                 sctp_free_remote_addr(chk->whoTo);
5153                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5154                 SCTP_DECR_CHK_COUNT();
5155                 /* sa_ignore FREED_MEMORY */
5156         }
5157         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5158                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5159                 if (chk->data) {
5160                         sctp_m_freem(chk->data);
5161                         chk->data = NULL;
5162                 }
5163                 if (chk->holds_key_ref)
5164                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5165                 sctp_free_remote_addr(chk->whoTo);
5166                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5167                 SCTP_DECR_CHK_COUNT();
5168                 /* sa_ignore FREED_MEMORY */
5169         }
5170
5171         if (asoc->mapping_array) {
5172                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5173                 asoc->mapping_array = NULL;
5174         }
5175         if (asoc->nr_mapping_array) {
5176                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5177                 asoc->nr_mapping_array = NULL;
5178         }
5179         /* the stream outs */
5180         if (asoc->strmout) {
5181                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5182                 asoc->strmout = NULL;
5183         }
5184         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5185         if (asoc->strmin) {
5186                 struct sctp_queued_to_read *ctl, *nctl;
5187
5188                 for (i = 0; i < asoc->streamincnt; i++) {
5189                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5190                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5191                                 sctp_free_remote_addr(ctl->whoFrom);
5192                                 if (ctl->data) {
5193                                         sctp_m_freem(ctl->data);
5194                                         ctl->data = NULL;
5195                                 }
5196                                 /*
5197                                  * We don't free the address here since all
5198                                  * the net's were freed above.
5199                                  */
5200                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5201                                 SCTP_DECR_READQ_COUNT();
5202                         }
5203                 }
5204                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5205                 asoc->strmin = NULL;
5206         }
5207         asoc->streamincnt = 0;
5208         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5209 #ifdef INVARIANTS
5210                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5211                         panic("no net's left alloc'ed, or list points to itself");
5212                 }
5213 #endif
5214                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5215                 sctp_free_remote_addr(net);
5216         }
5217         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5218                 /* sa_ignore FREED_MEMORY */
5219                 sctp_remove_laddr(laddr);
5220         }
5221
5222         /* pending asconf (address) parameters */
5223         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5224                 /* sa_ignore FREED_MEMORY */
5225                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5226                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5227         }
5228         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5229                 /* sa_ignore FREED_MEMORY */
5230                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5231                 if (aack->data != NULL) {
5232                         sctp_m_freem(aack->data);
5233                 }
5234                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5235         }
5236         /* clean up auth stuff */
5237         if (asoc->local_hmacs)
5238                 sctp_free_hmaclist(asoc->local_hmacs);
5239         if (asoc->peer_hmacs)
5240                 sctp_free_hmaclist(asoc->peer_hmacs);
5241
5242         if (asoc->local_auth_chunks)
5243                 sctp_free_chunklist(asoc->local_auth_chunks);
5244         if (asoc->peer_auth_chunks)
5245                 sctp_free_chunklist(asoc->peer_auth_chunks);
5246
5247         sctp_free_authinfo(&asoc->authinfo);
5248
5249         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5250                 LIST_REMOVE(shared_key, next);
5251                 sctp_free_sharedkey(shared_key);
5252                 /* sa_ignore FREED_MEMORY */
5253         }
5254
5255         /* Insert new items here :> */
5256
5257         /* Get rid of LOCK */
5258         SCTP_TCB_LOCK_DESTROY(stcb);
5259         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5260         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5261                 SCTP_INP_INFO_WUNLOCK();
5262                 SCTP_INP_RLOCK(inp);
5263         }
5264 #ifdef SCTP_TRACK_FREED_ASOCS
5265         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5266                 /* now clean up the tasoc itself */
5267                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5268                 SCTP_DECR_ASOC_COUNT();
5269         } else {
5270                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5271         }
5272 #else
5273         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5274         SCTP_DECR_ASOC_COUNT();
5275 #endif
5276         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5277                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5278                         /*
5279                          * If its NOT the inp_free calling us AND sctp_close
5280                          * as been called, we call back...
5281                          */
5282                         SCTP_INP_RUNLOCK(inp);
5283                         /*
5284                          * This will start the kill timer (if we are the
5285                          * last one) since we hold an increment yet. But
5286                          * this is the only safe way to do this since
5287                          * otherwise if the socket closes at the same time
5288                          * we are here we might collide in the cleanup.
5289                          */
5290                         sctp_inpcb_free(inp,
5291                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5292                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5293                         SCTP_INP_DECR_REF(inp);
5294                         goto out_of;
5295                 } else {
5296                         /* The socket is still open. */
5297                         SCTP_INP_DECR_REF(inp);
5298                 }
5299         }
5300         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5301                 SCTP_INP_RUNLOCK(inp);
5302         }
5303 out_of:
5304         /* destroyed the asoc */
5305 #ifdef SCTP_LOG_CLOSING
5306         sctp_log_closing(inp, NULL, 11);
5307 #endif
5308         return (1);
5309 }
5310
5311
5312
5313 /*
5314  * determine if a destination is "reachable" based upon the addresses bound
5315  * to the current endpoint (e.g. only v4 or v6 currently bound)
5316  */
5317 /*
5318  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5319  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5320  * types bound as its endpoint
5321  */
5322 int
5323 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5324 {
5325         struct sctp_inpcb *inp;
5326         int answer;
5327
5328         /*
5329          * No locks here, the TCB, in all cases is already locked and an
5330          * assoc is up. There is either a INP lock by the caller applied (in
5331          * asconf case when deleting an address) or NOT in the HB case,
5332          * however if HB then the INP increment is up and the INP will not
5333          * be removed (on top of the fact that we have a TCB lock). So we
5334          * only want to read the sctp_flags, which is either bound-all or
5335          * not.. no protection needed since once an assoc is up you can't be
5336          * changing your binding.
5337          */
5338         inp = stcb->sctp_ep;
5339         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5340                 /* if bound all, destination is not restricted */
5341                 /*
5342                  * RRS: Question during lock work: Is this correct? If you
5343                  * are bound-all you still might need to obey the V4--V6
5344                  * flags??? IMO this bound-all stuff needs to be removed!
5345                  */
5346                 return (1);
5347         }
5348         /* NOTE: all "scope" checks are done when local addresses are added */
5349         switch (destaddr->sa_family) {
5350         case AF_INET6:
5351                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5352                 break;
5353         case AF_INET:
5354                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5355                 break;
5356         default:
5357                 /* invalid family, so it's unreachable */
5358                 answer = 0;
5359                 break;
5360         }
5361         return (answer);
5362 }
5363
5364 /*
5365  * update the inp_vflags on an endpoint
5366  */
5367 static void
5368 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5369 {
5370         struct sctp_laddr *laddr;
5371
5372         /* first clear the flag */
5373         inp->ip_inp.inp.inp_vflag = 0;
5374         /* set the flag based on addresses on the ep list */
5375         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5376                 if (laddr->ifa == NULL) {
5377                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5378                             __FUNCTION__);
5379                         continue;
5380                 }
5381                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5382                         continue;
5383                 }
5384                 switch (laddr->ifa->address.sa.sa_family) {
5385 #ifdef INET6
5386                 case AF_INET6:
5387                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5388                         break;
5389 #endif
5390 #ifdef INET
5391                 case AF_INET:
5392                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5393                         break;
5394 #endif
5395                 default:
5396                         break;
5397                 }
5398         }
5399 }
5400
5401 /*
5402  * Add the address to the endpoint local address list There is nothing to be
5403  * done if we are bound to all addresses
5404  */
5405 void
5406 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5407 {
5408         struct sctp_laddr *laddr;
5409         int fnd, error = 0;
5410
5411         fnd = 0;
5412
5413         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5414                 /* You are already bound to all. You have it already */
5415                 return;
5416         }
5417 #ifdef INET6
5418         if (ifa->address.sa.sa_family == AF_INET6) {
5419                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5420                         /* Can't bind a non-useable addr. */
5421                         return;
5422                 }
5423         }
5424 #endif
5425         /* first, is it already present? */
5426         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5427                 if (laddr->ifa == ifa) {
5428                         fnd = 1;
5429                         break;
5430                 }
5431         }
5432
5433         if (fnd == 0) {
5434                 /* Not in the ep list */
5435                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5436                 if (error != 0)
5437                         return;
5438                 inp->laddr_count++;
5439                 /* update inp_vflag flags */
5440                 switch (ifa->address.sa.sa_family) {
5441 #ifdef INET6
5442                 case AF_INET6:
5443                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5444                         break;
5445 #endif
5446 #ifdef INET6
5447                 case AF_INET:
5448                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5449                         break;
5450 #endif
5451                 default:
5452                         break;
5453                 }
5454         }
5455         return;
5456 }
5457
5458
5459 /*
5460  * select a new (hopefully reachable) destination net (should only be used
5461  * when we deleted an ep addr that is the only usable source address to reach
5462  * the destination net)
5463  */
5464 static void
5465 sctp_select_primary_destination(struct sctp_tcb *stcb)
5466 {
5467         struct sctp_nets *net;
5468
5469         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5470                 /* for now, we'll just pick the first reachable one we find */
5471                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5472                         continue;
5473                 if (sctp_destination_is_reachable(stcb,
5474                     (struct sockaddr *)&net->ro._l_addr)) {
5475                         /* found a reachable destination */
5476                         stcb->asoc.primary_destination = net;
5477                 }
5478         }
5479         /* I can't there from here! ...we're gonna die shortly... */
5480 }
5481
5482
5483 /*
5484  * Delete the address from the endpoint local address list There is nothing
5485  * to be done if we are bound to all addresses
5486  */
5487 void
5488 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5489 {
5490         struct sctp_laddr *laddr;
5491         int fnd;
5492
5493         fnd = 0;
5494         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5495                 /* You are already bound to all. You have it already */
5496                 return;
5497         }
5498         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5499                 if (laddr->ifa == ifa) {
5500                         fnd = 1;
5501                         break;
5502                 }
5503         }
5504         if (fnd && (inp->laddr_count < 2)) {
5505                 /* can't delete unless there are at LEAST 2 addresses */
5506                 return;
5507         }
5508         if (fnd) {
5509                 /*
5510                  * clean up any use of this address go through our
5511                  * associations and clear any last_used_address that match
5512                  * this one for each assoc, see if a new primary_destination
5513                  * is needed
5514                  */
5515                 struct sctp_tcb *stcb;
5516
5517                 /* clean up "next_addr_touse" */
5518                 if (inp->next_addr_touse == laddr)
5519                         /* delete this address */
5520                         inp->next_addr_touse = NULL;
5521
5522                 /* clean up "last_used_address" */
5523                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5524                         struct sctp_nets *net;
5525
5526                         SCTP_TCB_LOCK(stcb);
5527                         if (stcb->asoc.last_used_address == laddr)
5528                                 /* delete this address */
5529                                 stcb->asoc.last_used_address = NULL;
5530                         /*
5531                          * Now spin through all the nets and purge any ref
5532                          * to laddr
5533                          */
5534                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5535                                 if (net->ro._s_addr &&
5536                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5537                                         /* Yep, purge src address selected */
5538                                         sctp_rtentry_t *rt;
5539
5540                                         /* delete this address if cached */
5541                                         rt = net->ro.ro_rt;
5542                                         if (rt != NULL) {
5543                                                 RTFREE(rt);
5544                                                 net->ro.ro_rt = NULL;
5545                                         }
5546                                         sctp_free_ifa(net->ro._s_addr);
5547                                         net->ro._s_addr = NULL;
5548                                         net->src_addr_selected = 0;
5549                                 }
5550                         }
5551                         SCTP_TCB_UNLOCK(stcb);
5552                 }               /* for each tcb */
5553                 /* remove it from the ep list */
5554                 sctp_remove_laddr(laddr);
5555                 inp->laddr_count--;
5556                 /* update inp_vflag flags */
5557                 sctp_update_ep_vflag(inp);
5558         }
5559         return;
5560 }
5561
5562 /*
5563  * Add the address to the TCB local address restricted list.
5564  * This is a "pending" address list (eg. addresses waiting for an
5565  * ASCONF-ACK response) and cannot be used as a valid source address.
5566  */
5567 void
5568 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5569 {
5570         struct sctp_inpcb *inp;
5571         struct sctp_laddr *laddr;
5572         struct sctpladdr *list;
5573
5574         /*
5575          * Assumes TCB is locked.. and possibly the INP. May need to
5576          * confirm/fix that if we need it and is not the case.
5577          */
5578         list = &stcb->asoc.sctp_restricted_addrs;
5579
5580         inp = stcb->sctp_ep;
5581 #ifdef INET6
5582         if (ifa->address.sa.sa_family == AF_INET6) {
5583                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5584                         /* Can't bind a non-existent addr. */
5585                         return;
5586                 }
5587         }
5588 #endif
5589         /* does the address already exist? */
5590         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5591                 if (laddr->ifa == ifa) {
5592                         return;
5593                 }
5594         }
5595
5596         /* add to the list */
5597         (void)sctp_insert_laddr(list, ifa, 0);
5598         return;
5599 }
5600
5601 /*
5602  * insert an laddr entry with the given ifa for the desired list
5603  */
5604 int
5605 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5606 {
5607         struct sctp_laddr *laddr;
5608
5609         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5610         if (laddr == NULL) {
5611                 /* out of memory? */
5612                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5613                 return (EINVAL);
5614         }
5615         SCTP_INCR_LADDR_COUNT();
5616         bzero(laddr, sizeof(*laddr));
5617         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5618         laddr->ifa = ifa;
5619         laddr->action = act;
5620         atomic_add_int(&ifa->refcount, 1);
5621         /* insert it */
5622         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5623
5624         return (0);
5625 }
5626
5627 /*
5628  * Remove an laddr entry from the local address list (on an assoc)
5629  */
5630 void
5631 sctp_remove_laddr(struct sctp_laddr *laddr)
5632 {
5633
5634         /* remove from the list */
5635         LIST_REMOVE(laddr, sctp_nxt_addr);
5636         sctp_free_ifa(laddr->ifa);
5637         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5638         SCTP_DECR_LADDR_COUNT();
5639 }
5640
5641 /*
5642  * Remove a local address from the TCB local address restricted list
5643  */
5644 void
5645 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5646 {
5647         struct sctp_inpcb *inp;
5648         struct sctp_laddr *laddr;
5649
5650         /*
5651          * This is called by asconf work. It is assumed that a) The TCB is
5652          * locked and b) The INP is locked. This is true in as much as I can
5653          * trace through the entry asconf code where I did these locks.
5654          * Again, the ASCONF code is a bit different in that it does lock
5655          * the INP during its work often times. This must be since we don't
5656          * want other proc's looking up things while what they are looking
5657          * up is changing :-D
5658          */
5659
5660         inp = stcb->sctp_ep;
5661         /* if subset bound and don't allow ASCONF's, can't delete last */
5662         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5663             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5664                 if (stcb->sctp_ep->laddr_count < 2) {
5665                         /* can't delete last address */
5666                         return;
5667                 }
5668         }
5669         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5670                 /* remove the address if it exists */
5671                 if (laddr->ifa == NULL)
5672                         continue;
5673                 if (laddr->ifa == ifa) {
5674                         sctp_remove_laddr(laddr);
5675                         return;
5676                 }
5677         }
5678
5679         /* address not found! */
5680         return;
5681 }
5682
5683 /*
5684  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5685  */
5686 /* sysctl */
5687 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5688 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5689
5690
5691
5692 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5693 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5694 int *sctp_cpuarry = NULL;
5695 void
5696 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5697 {
5698         /* Queue a packet to a processor for the specified core */
5699         struct sctp_mcore_queue *qent;
5700         struct sctp_mcore_ctrl *wkq;
5701         int need_wake = 0;
5702
5703         if (sctp_mcore_workers == NULL) {
5704                 /* Something went way bad during setup */
5705                 sctp_input_with_port(m, off, 0);
5706                 return;
5707         }
5708         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5709             (sizeof(struct sctp_mcore_queue)),
5710             SCTP_M_MCORE);
5711         if (qent == NULL) {
5712                 /* This is trouble  */
5713                 sctp_input_with_port(m, off, 0);
5714                 return;
5715         }
5716         qent->vn = curvnet;
5717         qent->m = m;
5718         qent->off = off;
5719         qent->v6 = 0;
5720         wkq = &sctp_mcore_workers[cpu_to_use];
5721         SCTP_MCORE_QLOCK(wkq);
5722
5723         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5724         if (wkq->running == 0) {
5725                 need_wake = 1;
5726         }
5727         SCTP_MCORE_QUNLOCK(wkq);
5728         if (need_wake) {
5729                 wakeup(&wkq->running);
5730         }
5731 }
5732
5733 static void
5734 sctp_mcore_thread(void *arg)
5735 {
5736
5737         struct sctp_mcore_ctrl *wkq;
5738         struct sctp_mcore_queue *qent;
5739
5740         wkq = (struct sctp_mcore_ctrl *)arg;
5741         struct mbuf *m;
5742         int off, v6;
5743
5744         /* Wait for first tickle */
5745         SCTP_MCORE_LOCK(wkq);
5746         wkq->running = 0;
5747         msleep(&wkq->running,
5748             &wkq->core_mtx,
5749             0, "wait for pkt", 0);
5750         SCTP_MCORE_UNLOCK(wkq);
5751
5752         /* Bind to our cpu */
5753         thread_lock(curthread);
5754         sched_bind(curthread, wkq->cpuid);
5755         thread_unlock(curthread);
5756
5757         /* Now lets start working */
5758         SCTP_MCORE_LOCK(wkq);
5759         /* Now grab lock and go */
5760         while (1) {
5761                 SCTP_MCORE_QLOCK(wkq);
5762 skip_sleep:
5763                 wkq->running = 1;
5764                 qent = TAILQ_FIRST(&wkq->que);
5765                 if (qent) {
5766                         TAILQ_REMOVE(&wkq->que, qent, next);
5767                         SCTP_MCORE_QUNLOCK(wkq);
5768                         CURVNET_SET(qent->vn);
5769                         m = qent->m;
5770                         off = qent->off;
5771                         v6 = qent->v6;
5772                         SCTP_FREE(qent, SCTP_M_MCORE);
5773                         if (v6 == 0) {
5774                                 sctp_input_with_port(m, off, 0);
5775                         } else {
5776                                 printf("V6 not yet supported\n");
5777                                 sctp_m_freem(m);
5778                         }
5779                         CURVNET_RESTORE();
5780                         SCTP_MCORE_QLOCK(wkq);
5781                 }
5782                 wkq->running = 0;
5783                 if (!TAILQ_EMPTY(&wkq->que)) {
5784                         goto skip_sleep;
5785                 }
5786                 SCTP_MCORE_QUNLOCK(wkq);
5787                 msleep(&wkq->running,
5788                     &wkq->core_mtx,
5789                     0, "wait for pkt", 0);
5790         };
5791 }
5792
5793 static void
5794 sctp_startup_mcore_threads(void)
5795 {
5796         int i, cpu;
5797
5798         if (mp_ncpus == 1)
5799                 return;
5800
5801         if (sctp_mcore_workers != NULL) {
5802                 /*
5803                  * Already been here in some previous vnet?
5804                  */
5805                 return;
5806         }
5807         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5808             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5809             SCTP_M_MCORE);
5810         if (sctp_mcore_workers == NULL) {
5811                 /* TSNH I hope */
5812                 return;
5813         }
5814         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5815             sizeof(struct sctp_mcore_ctrl)));
5816         /* Init the structures */
5817         for (i = 0; i <= mp_maxid; i++) {
5818                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5819                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5820                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5821                 sctp_mcore_workers[i].cpuid = i;
5822         }
5823         if (sctp_cpuarry == NULL) {
5824                 SCTP_MALLOC(sctp_cpuarry, int *,
5825                     (mp_ncpus * sizeof(int)),
5826                     SCTP_M_MCORE);
5827                 i = 0;
5828                 CPU_FOREACH(cpu) {
5829                         sctp_cpuarry[i] = cpu;
5830                         i++;
5831                 }
5832         }
5833         /* Now start them all */
5834         CPU_FOREACH(cpu) {
5835                 (void)kproc_create(sctp_mcore_thread,
5836                     (void *)&sctp_mcore_workers[cpu],
5837                     &sctp_mcore_workers[cpu].thread_proc,
5838                     RFPROC,
5839                     SCTP_KTHREAD_PAGES,
5840                     SCTP_MCORE_NAME);
5841
5842         }
5843 }
5844
5845 #endif
5846
5847 void
5848 sctp_pcb_init()
5849 {
5850         /*
5851          * SCTP initialization for the PCB structures should be called by
5852          * the sctp_init() funciton.
5853          */
5854         int i;
5855         struct timeval tv;
5856
5857         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5858                 /* error I was called twice */
5859                 return;
5860         }
5861         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5862
5863 #if defined(SCTP_LOCAL_TRACE_BUF)
5864         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5865 #endif
5866 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5867         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5868             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5869             SCTP_M_MCORE);
5870 #endif
5871         (void)SCTP_GETTIME_TIMEVAL(&tv);
5872 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5873         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5874         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5875         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5876 #else
5877         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5878         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5879         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5880 #endif
5881         /* init the empty list of (All) Endpoints */
5882         LIST_INIT(&SCTP_BASE_INFO(listhead));
5883
5884
5885         /* init the hash table of endpoints */
5886         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5887         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5888         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5889         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5890             &SCTP_BASE_INFO(hashasocmark));
5891         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5892             &SCTP_BASE_INFO(hashmark));
5893         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5894             &SCTP_BASE_INFO(hashtcpmark));
5895         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5896
5897
5898         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5899             &SCTP_BASE_INFO(hashvrfmark));
5900
5901         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5902             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5903         /* init the zones */
5904         /*
5905          * FIX ME: Should check for NULL returns, but if it does fail we are
5906          * doomed to panic anyways... add later maybe.
5907          */
5908         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5909             sizeof(struct sctp_inpcb), maxsockets);
5910
5911         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5912             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5913
5914         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5915             sizeof(struct sctp_laddr),
5916             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5917
5918         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5919             sizeof(struct sctp_nets),
5920             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5921
5922         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5923             sizeof(struct sctp_tmit_chunk),
5924             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5925
5926         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5927             sizeof(struct sctp_queued_to_read),
5928             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5929
5930         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5931             sizeof(struct sctp_stream_queue_pending),
5932             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5933
5934         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5935             sizeof(struct sctp_asconf),
5936             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5937
5938         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5939             sizeof(struct sctp_asconf_ack),
5940             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5941
5942
5943         /* Master Lock INIT for info structure */
5944         SCTP_INP_INFO_LOCK_INIT();
5945         SCTP_STATLOG_INIT_LOCK();
5946
5947         SCTP_IPI_COUNT_INIT();
5948         SCTP_IPI_ADDR_INIT();
5949 #ifdef SCTP_PACKET_LOGGING
5950         SCTP_IP_PKTLOG_INIT();
5951 #endif
5952         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5953
5954         SCTP_WQ_ADDR_INIT();
5955         /* not sure if we need all the counts */
5956         SCTP_BASE_INFO(ipi_count_ep) = 0;
5957         /* assoc/tcb zone info */
5958         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5959         /* local addrlist zone info */
5960         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5961         /* remote addrlist zone info */
5962         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5963         /* chunk info */
5964         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5965
5966         /* socket queue zone info */
5967         SCTP_BASE_INFO(ipi_count_readq) = 0;
5968
5969         /* stream out queue cont */
5970         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5971
5972         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5973         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5974
5975         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5976
5977         /* Init the TIMEWAIT list */
5978         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5979                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5980         }
5981
5982         sctp_startup_iterator();
5983
5984 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5985         sctp_startup_mcore_threads();
5986 #endif
5987
5988         /*
5989          * INIT the default VRF which for BSD is the only one, other O/S's
5990          * may have more. But initially they must start with one and then
5991          * add the VRF's as addresses are added.
5992          */
5993         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5994 }
5995
5996 /*
5997  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5998  */
5999 void
6000 sctp_pcb_finish(void)
6001 {
6002         struct sctp_vrflist *vrf_bucket;
6003         struct sctp_vrf *vrf, *nvrf;
6004         struct sctp_ifn *ifn, *nifn;
6005         struct sctp_ifa *ifa, *nifa;
6006         struct sctpvtaghead *chain;
6007         struct sctp_tagblock *twait_block, *prev_twait_block;
6008         struct sctp_laddr *wi, *nwi;
6009         int i;
6010
6011         /*
6012          * Free BSD the it thread never exits but we do clean up. The only
6013          * way freebsd reaches here if we have VRF's but we still add the
6014          * ifdef to make it compile on old versions.
6015          */
6016         {
6017                 struct sctp_iterator *it, *nit;
6018
6019                 SCTP_IPI_ITERATOR_WQ_LOCK();
6020                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
6021                         if (it->vn != curvnet) {
6022                                 continue;
6023                         }
6024                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6025                         if (it->function_atend != NULL) {
6026                                 (*it->function_atend) (it->pointer, it->val);
6027                         }
6028                         SCTP_FREE(it, SCTP_M_ITER);
6029                 }
6030                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
6031                 SCTP_ITERATOR_LOCK();
6032                 if ((sctp_it_ctl.cur_it) &&
6033                     (sctp_it_ctl.cur_it->vn == curvnet)) {
6034                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
6035                 }
6036                 SCTP_ITERATOR_UNLOCK();
6037         }
6038
6039         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
6040         SCTP_WQ_ADDR_LOCK();
6041         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
6042                 LIST_REMOVE(wi, sctp_nxt_addr);
6043                 SCTP_DECR_LADDR_COUNT();
6044                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
6045         }
6046         SCTP_WQ_ADDR_UNLOCK();
6047
6048         /*
6049          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
6050          * destroyed first).
6051          */
6052         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6053         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6054                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6055                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6056                                 /* free the ifa */
6057                                 LIST_REMOVE(ifa, next_bucket);
6058                                 LIST_REMOVE(ifa, next_ifa);
6059                                 SCTP_FREE(ifa, SCTP_M_IFA);
6060                         }
6061                         /* free the ifn */
6062                         LIST_REMOVE(ifn, next_bucket);
6063                         LIST_REMOVE(ifn, next_ifn);
6064                         SCTP_FREE(ifn, SCTP_M_IFN);
6065                 }
6066                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6067                 /* free the vrf */
6068                 LIST_REMOVE(vrf, next_vrf);
6069                 SCTP_FREE(vrf, SCTP_M_VRF);
6070         }
6071         /* free the vrf hashes */
6072         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6073         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6074
6075         /*
6076          * free the TIMEWAIT list elements malloc'd in the function
6077          * sctp_add_vtag_to_timewait()...
6078          */
6079         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6080                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6081                 if (!LIST_EMPTY(chain)) {
6082                         prev_twait_block = NULL;
6083                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6084                                 if (prev_twait_block) {
6085                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6086                                 }
6087                                 prev_twait_block = twait_block;
6088                         }
6089                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6090                 }
6091         }
6092
6093         /* free the locks and mutexes */
6094 #ifdef SCTP_PACKET_LOGGING
6095         SCTP_IP_PKTLOG_DESTROY();
6096 #endif
6097         SCTP_IPI_ADDR_DESTROY();
6098         SCTP_STATLOG_DESTROY();
6099         SCTP_INP_INFO_LOCK_DESTROY();
6100
6101         SCTP_WQ_ADDR_DESTROY();
6102
6103         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6104         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6105         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6106         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6107         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6108         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6109         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6110         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6111         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6112         /* Get rid of other stuff to */
6113         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6114                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6115         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6116                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6117         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6118                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6119 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6120         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6121 #endif
6122 }
6123
6124
6125 int
6126 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6127     int iphlen, int offset, int limit, struct sctphdr *sh,
6128     struct sockaddr *altsa)
6129 {
6130         /*
6131          * grub through the INIT pulling addresses and loading them to the
6132          * nets structure in the asoc. The from address in the mbuf should
6133          * also be loaded (if it is not already). This routine can be called
6134          * with either INIT or INIT-ACK's as long as the m points to the IP
6135          * packet and the offset points to the beginning of the parameters.
6136          */
6137         struct sctp_inpcb *inp, *l_inp;
6138         struct sctp_nets *net, *nnet, *net_tmp;
6139         struct ip *iph;
6140         struct sctp_paramhdr *phdr, parm_buf;
6141         struct sctp_tcb *stcb_tmp;
6142         uint16_t ptype, plen;
6143         struct sockaddr *sa;
6144         struct sockaddr_storage dest_store;
6145         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
6146         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6147         struct sctp_auth_random *p_random = NULL;
6148         uint16_t random_len = 0;
6149         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6150         struct sctp_auth_hmac_algo *hmacs = NULL;
6151         uint16_t hmacs_len = 0;
6152         uint8_t saw_asconf = 0;
6153         uint8_t saw_asconf_ack = 0;
6154         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6155         struct sctp_auth_chunk_list *chunks = NULL;
6156         uint16_t num_chunks = 0;
6157         sctp_key_t *new_key;
6158         uint32_t keylen;
6159         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6160         uint8_t ecn_allowed;
6161
6162 #ifdef INET
6163         struct sockaddr_in sin;
6164
6165 #endif
6166 #ifdef INET6
6167         struct sockaddr_in6 sin6;
6168
6169 #endif
6170
6171         /* First get the destination address setup too. */
6172 #ifdef INET
6173         memset(&sin, 0, sizeof(sin));
6174         sin.sin_family = AF_INET;
6175         sin.sin_len = sizeof(sin);
6176         sin.sin_port = stcb->rport;
6177 #endif
6178 #ifdef INET6
6179         memset(&sin6, 0, sizeof(sin6));
6180         sin6.sin6_family = AF_INET6;
6181         sin6.sin6_len = sizeof(struct sockaddr_in6);
6182         sin6.sin6_port = stcb->rport;
6183 #endif
6184         iph = mtod(m, struct ip *);
6185         switch (iph->ip_v) {
6186 #ifdef INET
6187         case IPVERSION:
6188                 {
6189                         /* its IPv4 */
6190                         struct sockaddr_in *sin_2;
6191
6192                         sin_2 = (struct sockaddr_in *)(local_sa);
6193                         memset(sin_2, 0, sizeof(sin));
6194                         sin_2->sin_family = AF_INET;
6195                         sin_2->sin_len = sizeof(sin);
6196                         sin_2->sin_port = sh->dest_port;
6197                         sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
6198                         if (altsa) {
6199                                 /*
6200                                  * For cookies we use the src address NOT
6201                                  * from the packet but from the original
6202                                  * INIT.
6203                                  */
6204                                 sa = altsa;
6205                         } else {
6206                                 sin.sin_addr = iph->ip_src;
6207                                 sa = (struct sockaddr *)&sin;
6208                         }
6209                         break;
6210                 }
6211 #endif
6212 #ifdef INET6
6213         case IPV6_VERSION >> 4:
6214                 {
6215                         /* its IPv6 */
6216                         struct ip6_hdr *ip6;
6217                         struct sockaddr_in6 *sin6_2;
6218
6219                         ip6 = mtod(m, struct ip6_hdr *);
6220                         sin6_2 = (struct sockaddr_in6 *)(local_sa);
6221                         memset(sin6_2, 0, sizeof(sin6));
6222                         sin6_2->sin6_family = AF_INET6;
6223                         sin6_2->sin6_len = sizeof(struct sockaddr_in6);
6224                         sin6_2->sin6_port = sh->dest_port;
6225                         sin6_2->sin6_addr = ip6->ip6_dst;
6226                         if (altsa) {
6227                                 /*
6228                                  * For cookies we use the src address NOT
6229                                  * from the packet but from the original
6230                                  * INIT.
6231                                  */
6232                                 sa = altsa;
6233                         } else {
6234                                 sin6.sin6_addr = ip6->ip6_src;
6235                                 sa = (struct sockaddr *)&sin6;
6236                         }
6237                         break;
6238                 }
6239 #endif
6240         default:
6241                 return (-1);
6242                 break;
6243         }
6244         /* Turn off ECN until we get through all params */
6245         ecn_allowed = 0;
6246         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6247                 /* mark all addresses that we have currently on the list */
6248                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6249         }
6250         /* does the source address already exist? if so skip it */
6251         l_inp = inp = stcb->sctp_ep;
6252
6253         atomic_add_int(&stcb->asoc.refcnt, 1);
6254         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
6255         atomic_add_int(&stcb->asoc.refcnt, -1);
6256
6257         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6258                 /* we must add the source address */
6259                 /* no scope set here since we have a tcb already. */
6260                 switch (sa->sa_family) {
6261 #ifdef INET
6262                 case AF_INET:
6263                         if (stcb->asoc.ipv4_addr_legal) {
6264                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6265                                         return (-1);
6266                                 }
6267                         }
6268                         break;
6269 #endif
6270 #ifdef INET6
6271                 case AF_INET6:
6272                         if (stcb->asoc.ipv6_addr_legal) {
6273                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6274                                         return (-2);
6275                                 }
6276                         }
6277                         break;
6278 #endif
6279                 default:
6280                         break;
6281                 }
6282         } else {
6283                 if (net_tmp != NULL && stcb_tmp == stcb) {
6284                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6285                 } else if (stcb_tmp != stcb) {
6286                         /* It belongs to another association? */
6287                         if (stcb_tmp)
6288                                 SCTP_TCB_UNLOCK(stcb_tmp);
6289                         return (-3);
6290                 }
6291         }
6292         if (stcb->asoc.state == 0) {
6293                 /* the assoc was freed? */
6294                 return (-4);
6295         }
6296         /*
6297          * peer must explicitly turn this on. This may have been initialized
6298          * to be "on" in order to allow local addr changes while INIT's are
6299          * in flight.
6300          */
6301         stcb->asoc.peer_supports_asconf = 0;
6302         /* now we must go through each of the params. */
6303         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6304         while (phdr) {
6305                 ptype = ntohs(phdr->param_type);
6306                 plen = ntohs(phdr->param_length);
6307                 /*
6308                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
6309                  * (int)plen);
6310                  */
6311                 if (offset + plen > limit) {
6312                         break;
6313                 }
6314                 if (plen == 0) {
6315                         break;
6316                 }
6317 #ifdef INET
6318                 if (ptype == SCTP_IPV4_ADDRESS) {
6319                         if (stcb->asoc.ipv4_addr_legal) {
6320                                 struct sctp_ipv4addr_param *p4, p4_buf;
6321
6322                                 /* ok get the v4 address and check/add */
6323                                 phdr = sctp_get_next_param(m, offset,
6324                                     (struct sctp_paramhdr *)&p4_buf,
6325                                     sizeof(p4_buf));
6326                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6327                                     phdr == NULL) {
6328                                         return (-5);
6329                                 }
6330                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6331                                 sin.sin_addr.s_addr = p4->addr;
6332                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6333                                         /* Skip multi-cast addresses */
6334                                         goto next_param;
6335                                 }
6336                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6337                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6338                                         goto next_param;
6339                                 }
6340                                 sa = (struct sockaddr *)&sin;
6341                                 inp = stcb->sctp_ep;
6342                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6343                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6344                                     local_sa, stcb);
6345                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6346
6347                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6348                                     inp == NULL) {
6349                                         /* we must add the source address */
6350                                         /*
6351                                          * no scope set since we have a tcb
6352                                          * already
6353                                          */
6354
6355                                         /*
6356                                          * we must validate the state again
6357                                          * here
6358                                          */
6359                         add_it_now:
6360                                         if (stcb->asoc.state == 0) {
6361                                                 /* the assoc was freed? */
6362                                                 return (-7);
6363                                         }
6364                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6365                                                 return (-8);
6366                                         }
6367                                 } else if (stcb_tmp == stcb) {
6368                                         if (stcb->asoc.state == 0) {
6369                                                 /* the assoc was freed? */
6370                                                 return (-10);
6371                                         }
6372                                         if (net != NULL) {
6373                                                 /* clear flag */
6374                                                 net->dest_state &=
6375                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6376                                         }
6377                                 } else {
6378                                         /*
6379                                          * strange, address is in another
6380                                          * assoc? straighten out locks.
6381                                          */
6382                                         if (stcb_tmp) {
6383                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6384                                                         /*
6385                                                          * in setup state we
6386                                                          * abort this guy
6387                                                          */
6388                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6389                                                             stcb_tmp, 1, NULL, 0);
6390                                                         goto add_it_now;
6391                                                 }
6392                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6393                                         }
6394                                         if (stcb->asoc.state == 0) {
6395                                                 /* the assoc was freed? */
6396                                                 return (-12);
6397                                         }
6398                                         return (-13);
6399                                 }
6400                         }
6401                 } else
6402 #endif
6403 #ifdef INET6
6404                 if (ptype == SCTP_IPV6_ADDRESS) {
6405                         if (stcb->asoc.ipv6_addr_legal) {
6406                                 /* ok get the v6 address and check/add */
6407                                 struct sctp_ipv6addr_param *p6, p6_buf;
6408
6409                                 phdr = sctp_get_next_param(m, offset,
6410                                     (struct sctp_paramhdr *)&p6_buf,
6411                                     sizeof(p6_buf));
6412                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6413                                     phdr == NULL) {
6414                                         return (-14);
6415                                 }
6416                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6417                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6418                                     sizeof(p6->addr));
6419                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6420                                         /* Skip multi-cast addresses */
6421                                         goto next_param;
6422                                 }
6423                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6424                                         /*
6425                                          * Link local make no sense without
6426                                          * scope
6427                                          */
6428                                         goto next_param;
6429                                 }
6430                                 sa = (struct sockaddr *)&sin6;
6431                                 inp = stcb->sctp_ep;
6432                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6433                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6434                                     local_sa, stcb);
6435                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6436                                 if (stcb_tmp == NULL &&
6437                                     (inp == stcb->sctp_ep || inp == NULL)) {
6438                                         /*
6439                                          * we must validate the state again
6440                                          * here
6441                                          */
6442                         add_it_now6:
6443                                         if (stcb->asoc.state == 0) {
6444                                                 /* the assoc was freed? */
6445                                                 return (-16);
6446                                         }
6447                                         /*
6448                                          * we must add the address, no scope
6449                                          * set
6450                                          */
6451                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6452                                                 return (-17);
6453                                         }
6454                                 } else if (stcb_tmp == stcb) {
6455                                         /*
6456                                          * we must validate the state again
6457                                          * here
6458                                          */
6459                                         if (stcb->asoc.state == 0) {
6460                                                 /* the assoc was freed? */
6461                                                 return (-19);
6462                                         }
6463                                         if (net != NULL) {
6464                                                 /* clear flag */
6465                                                 net->dest_state &=
6466                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6467                                         }
6468                                 } else {
6469                                         /*
6470                                          * strange, address is in another
6471                                          * assoc? straighten out locks.
6472                                          */
6473                                         if (stcb_tmp)
6474                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6475                                                         /*
6476                                                          * in setup state we
6477                                                          * abort this guy
6478                                                          */
6479                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6480                                                             stcb_tmp, 1, NULL, 0);
6481                                                         goto add_it_now6;
6482                                                 }
6483                                         SCTP_TCB_UNLOCK(stcb_tmp);
6484
6485                                         if (stcb->asoc.state == 0) {
6486                                                 /* the assoc was freed? */
6487                                                 return (-21);
6488                                         }
6489                                         return (-22);
6490                                 }
6491                         }
6492                 } else
6493 #endif
6494                 if (ptype == SCTP_ECN_CAPABLE) {
6495                         ecn_allowed = 1;
6496                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6497                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6498                                 struct sctp_adaptation_layer_indication ai,
6499                                                                 *aip;
6500
6501                                 phdr = sctp_get_next_param(m, offset,
6502                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6503                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6504                                 if (aip) {
6505                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6506                                         stcb->asoc.adaptation_needed = 1;
6507                                 }
6508                         }
6509                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6510                         struct sctp_asconf_addr_param lstore, *fee;
6511                         int lptype;
6512                         struct sockaddr *lsa = NULL;
6513
6514 #ifdef INET
6515                         struct sctp_asconf_addrv4_param *fii;
6516
6517 #endif
6518
6519                         stcb->asoc.peer_supports_asconf = 1;
6520                         if (plen > sizeof(lstore)) {
6521                                 return (-23);
6522                         }
6523                         phdr = sctp_get_next_param(m, offset,
6524                             (struct sctp_paramhdr *)&lstore,
6525                             min(plen, sizeof(lstore)));
6526                         if (phdr == NULL) {
6527                                 return (-24);
6528                         }
6529                         fee = (struct sctp_asconf_addr_param *)phdr;
6530                         lptype = ntohs(fee->addrp.ph.param_type);
6531                         switch (lptype) {
6532 #ifdef INET
6533                         case SCTP_IPV4_ADDRESS:
6534                                 if (plen !=
6535                                     sizeof(struct sctp_asconf_addrv4_param)) {
6536                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6537                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6538                                             plen);
6539                                 } else {
6540                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6541                                         sin.sin_addr.s_addr = fii->addrp.addr;
6542                                         lsa = (struct sockaddr *)&sin;
6543                                 }
6544                                 break;
6545 #endif
6546 #ifdef INET6
6547                         case SCTP_IPV6_ADDRESS:
6548                                 if (plen !=
6549                                     sizeof(struct sctp_asconf_addr_param)) {
6550                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6551                                             (int)sizeof(struct sctp_asconf_addr_param),
6552                                             plen);
6553                                 } else {
6554                                         memcpy(sin6.sin6_addr.s6_addr,
6555                                             fee->addrp.addr,
6556                                             sizeof(fee->addrp.addr));
6557                                         lsa = (struct sockaddr *)&sin6;
6558                                 }
6559                                 break;
6560 #endif
6561                         default:
6562                                 break;
6563                         }
6564                         if (lsa) {
6565                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6566                         }
6567                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6568                         stcb->asoc.peer_supports_nat = 1;
6569                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6570                         /* Peer supports pr-sctp */
6571                         stcb->asoc.peer_supports_prsctp = 1;
6572                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6573                         /* A supported extension chunk */
6574                         struct sctp_supported_chunk_types_param *pr_supported;
6575                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6576                         int num_ent, i;
6577
6578                         phdr = sctp_get_next_param(m, offset,
6579                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6580                         if (phdr == NULL) {
6581                                 return (-25);
6582                         }
6583                         stcb->asoc.peer_supports_asconf = 0;
6584                         stcb->asoc.peer_supports_prsctp = 0;
6585                         stcb->asoc.peer_supports_pktdrop = 0;
6586                         stcb->asoc.peer_supports_strreset = 0;
6587                         stcb->asoc.peer_supports_nr_sack = 0;
6588                         stcb->asoc.peer_supports_auth = 0;
6589                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6590                         num_ent = plen - sizeof(struct sctp_paramhdr);
6591                         for (i = 0; i < num_ent; i++) {
6592                                 switch (pr_supported->chunk_types[i]) {
6593                                 case SCTP_ASCONF:
6594                                 case SCTP_ASCONF_ACK:
6595                                         stcb->asoc.peer_supports_asconf = 1;
6596                                         break;
6597                                 case SCTP_FORWARD_CUM_TSN:
6598                                         stcb->asoc.peer_supports_prsctp = 1;
6599                                         break;
6600                                 case SCTP_PACKET_DROPPED:
6601                                         stcb->asoc.peer_supports_pktdrop = 1;
6602                                         break;
6603                                 case SCTP_NR_SELECTIVE_ACK:
6604                                         stcb->asoc.peer_supports_nr_sack = 1;
6605                                         break;
6606                                 case SCTP_STREAM_RESET:
6607                                         stcb->asoc.peer_supports_strreset = 1;
6608                                         break;
6609                                 case SCTP_AUTHENTICATION:
6610                                         stcb->asoc.peer_supports_auth = 1;
6611                                         break;
6612                                 default:
6613                                         /* one I have not learned yet */
6614                                         break;
6615
6616                                 }
6617                         }
6618                 } else if (ptype == SCTP_RANDOM) {
6619                         if (plen > sizeof(random_store))
6620                                 break;
6621                         if (got_random) {
6622                                 /* already processed a RANDOM */
6623                                 goto next_param;
6624                         }
6625                         phdr = sctp_get_next_param(m, offset,
6626                             (struct sctp_paramhdr *)random_store,
6627                             min(sizeof(random_store), plen));
6628                         if (phdr == NULL)
6629                                 return (-26);
6630                         p_random = (struct sctp_auth_random *)phdr;
6631                         random_len = plen - sizeof(*p_random);
6632                         /* enforce the random length */
6633                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6634                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6635                                 return (-27);
6636                         }
6637                         got_random = 1;
6638                 } else if (ptype == SCTP_HMAC_LIST) {
6639                         int num_hmacs;
6640                         int i;
6641
6642                         if (plen > sizeof(hmacs_store))
6643                                 break;
6644                         if (got_hmacs) {
6645                                 /* already processed a HMAC list */
6646                                 goto next_param;
6647                         }
6648                         phdr = sctp_get_next_param(m, offset,
6649                             (struct sctp_paramhdr *)hmacs_store,
6650                             min(plen, sizeof(hmacs_store)));
6651                         if (phdr == NULL)
6652                                 return (-28);
6653                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6654                         hmacs_len = plen - sizeof(*hmacs);
6655                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6656                         /* validate the hmac list */
6657                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6658                                 return (-29);
6659                         }
6660                         if (stcb->asoc.peer_hmacs != NULL)
6661                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6662                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6663                         if (stcb->asoc.peer_hmacs != NULL) {
6664                                 for (i = 0; i < num_hmacs; i++) {
6665                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6666                                             ntohs(hmacs->hmac_ids[i]));
6667                                 }
6668                         }
6669                         got_hmacs = 1;
6670                 } else if (ptype == SCTP_CHUNK_LIST) {
6671                         int i;
6672
6673                         if (plen > sizeof(chunks_store))
6674                                 break;
6675                         if (got_chklist) {
6676                                 /* already processed a Chunks list */
6677                                 goto next_param;
6678                         }
6679                         phdr = sctp_get_next_param(m, offset,
6680                             (struct sctp_paramhdr *)chunks_store,
6681                             min(plen, sizeof(chunks_store)));
6682                         if (phdr == NULL)
6683                                 return (-30);
6684                         chunks = (struct sctp_auth_chunk_list *)phdr;
6685                         num_chunks = plen - sizeof(*chunks);
6686                         if (stcb->asoc.peer_auth_chunks != NULL)
6687                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6688                         else
6689                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6690                         for (i = 0; i < num_chunks; i++) {
6691                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6692                                     stcb->asoc.peer_auth_chunks);
6693                                 /* record asconf/asconf-ack if listed */
6694                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6695                                         saw_asconf = 1;
6696                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6697                                         saw_asconf_ack = 1;
6698
6699                         }
6700                         got_chklist = 1;
6701                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6702                             (ptype == SCTP_STATE_COOKIE) ||
6703                             (ptype == SCTP_UNRECOG_PARAM) ||
6704                             (ptype == SCTP_COOKIE_PRESERVE) ||
6705                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6706                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6707                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6708                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6709                     (ptype == SCTP_SUCCESS_REPORT)) {
6710                          /* don't care */ ;
6711                 } else {
6712                         if ((ptype & 0x8000) == 0x0000) {
6713                                 /*
6714                                  * must stop processing the rest of the
6715                                  * param's. Any report bits were handled
6716                                  * with the call to
6717                                  * sctp_arethere_unrecognized_parameters()
6718                                  * when the INIT or INIT-ACK was first seen.
6719                                  */
6720                                 break;
6721                         }
6722                 }
6723
6724 next_param:
6725                 offset += SCTP_SIZE32(plen);
6726                 if (offset >= limit) {
6727                         break;
6728                 }
6729                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6730                     sizeof(parm_buf));
6731         }
6732         /* Now check to see if we need to purge any addresses */
6733         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6734                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6735                     SCTP_ADDR_NOT_IN_ASSOC) {
6736                         /* This address has been removed from the asoc */
6737                         /* remove and free it */
6738                         stcb->asoc.numnets--;
6739                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6740                         sctp_free_remote_addr(net);
6741                         if (net == stcb->asoc.primary_destination) {
6742                                 stcb->asoc.primary_destination = NULL;
6743                                 sctp_select_primary_destination(stcb);
6744                         }
6745                 }
6746         }
6747         if (ecn_allowed == 0) {
6748                 stcb->asoc.ecn_allowed = 0;
6749         }
6750         /* validate authentication required parameters */
6751         if (got_random && got_hmacs) {
6752                 stcb->asoc.peer_supports_auth = 1;
6753         } else {
6754                 stcb->asoc.peer_supports_auth = 0;
6755         }
6756         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6757                 /* peer does not support auth but sent a chunks list? */
6758                 return (-31);
6759         }
6760         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6761             !stcb->asoc.peer_supports_auth) {
6762                 /* peer supports asconf but not auth? */
6763                 return (-32);
6764         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6765             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6766                 return (-33);
6767         }
6768         /* concatenate the full random key */
6769         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6770         if (chunks != NULL) {
6771                 keylen += sizeof(*chunks) + num_chunks;
6772         }
6773         new_key = sctp_alloc_key(keylen);
6774         if (new_key != NULL) {
6775                 /* copy in the RANDOM */
6776                 if (p_random != NULL) {
6777                         keylen = sizeof(*p_random) + random_len;
6778                         bcopy(p_random, new_key->key, keylen);
6779                 }
6780                 /* append in the AUTH chunks */
6781                 if (chunks != NULL) {
6782                         bcopy(chunks, new_key->key + keylen,
6783                             sizeof(*chunks) + num_chunks);
6784                         keylen += sizeof(*chunks) + num_chunks;
6785                 }
6786                 /* append in the HMACs */
6787                 if (hmacs != NULL) {
6788                         bcopy(hmacs, new_key->key + keylen,
6789                             sizeof(*hmacs) + hmacs_len);
6790                 }
6791         } else {
6792                 /* failed to get memory for the key */
6793                 return (-34);
6794         }
6795         if (stcb->asoc.authinfo.peer_random != NULL)
6796                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6797         stcb->asoc.authinfo.peer_random = new_key;
6798         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6799         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6800
6801         return (0);
6802 }
6803
6804 int
6805 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6806     struct sctp_nets *net)
6807 {
6808         /* make sure the requested primary address exists in the assoc */
6809         if (net == NULL && sa)
6810                 net = sctp_findnet(stcb, sa);
6811
6812         if (net == NULL) {
6813                 /* didn't find the requested primary address! */
6814                 return (-1);
6815         } else {
6816                 /* set the primary address */
6817                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6818                         /* Must be confirmed, so queue to set */
6819                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6820                         return (0);
6821                 }
6822                 stcb->asoc.primary_destination = net;
6823                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6824                         sctp_free_remote_addr(stcb->asoc.alternate);
6825                         stcb->asoc.alternate = NULL;
6826                 }
6827                 net = TAILQ_FIRST(&stcb->asoc.nets);
6828                 if (net != stcb->asoc.primary_destination) {
6829                         /*
6830                          * first one on the list is NOT the primary
6831                          * sctp_cmpaddr() is much more efficient if the
6832                          * primary is the first on the list, make it so.
6833                          */
6834                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6835                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6836                 }
6837                 return (0);
6838         }
6839 }
6840
6841 int
6842 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6843 {
6844         /*
6845          * This function serves two purposes. It will see if a TAG can be
6846          * re-used and return 1 for yes it is ok and 0 for don't use that
6847          * tag. A secondary function it will do is purge out old tags that
6848          * can be removed.
6849          */
6850         struct sctpvtaghead *chain;
6851         struct sctp_tagblock *twait_block;
6852         struct sctpasochead *head;
6853         struct sctp_tcb *stcb;
6854         int i;
6855
6856         SCTP_INP_INFO_RLOCK();
6857         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6858             SCTP_BASE_INFO(hashasocmark))];
6859         if (head == NULL) {
6860                 /* invalid vtag */
6861                 goto skip_vtag_check;
6862         }
6863         LIST_FOREACH(stcb, head, sctp_asocs) {
6864                 /*
6865                  * We choose not to lock anything here. TCB's can't be
6866                  * removed since we have the read lock, so they can't be
6867                  * freed on us, same thing for the INP. I may be wrong with
6868                  * this assumption, but we will go with it for now :-)
6869                  */
6870                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6871                         continue;
6872                 }
6873                 if (stcb->asoc.my_vtag == tag) {
6874                         /* candidate */
6875                         if (stcb->rport != rport) {
6876                                 continue;
6877                         }
6878                         if (stcb->sctp_ep->sctp_lport != lport) {
6879                                 continue;
6880                         }
6881                         /* Its a used tag set */
6882                         SCTP_INP_INFO_RUNLOCK();
6883                         return (0);
6884                 }
6885         }
6886 skip_vtag_check:
6887
6888         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6889         /* Now what about timed wait ? */
6890         if (!LIST_EMPTY(chain)) {
6891                 /*
6892                  * Block(s) are present, lets see if we have this tag in the
6893                  * list
6894                  */
6895                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6896                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6897                                 if (twait_block->vtag_block[i].v_tag == 0) {
6898                                         /* not used */
6899                                         continue;
6900                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6901                                     now->tv_sec) {
6902                                         /* Audit expires this guy */
6903                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6904                                         twait_block->vtag_block[i].v_tag = 0;
6905                                         twait_block->vtag_block[i].lport = 0;
6906                                         twait_block->vtag_block[i].rport = 0;
6907                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6908                                             (twait_block->vtag_block[i].lport == lport) &&
6909                                     (twait_block->vtag_block[i].rport == rport)) {
6910                                         /* Bad tag, sorry :< */
6911                                         SCTP_INP_INFO_RUNLOCK();
6912                                         return (0);
6913                                 }
6914                         }
6915                 }
6916         }
6917         SCTP_INP_INFO_RUNLOCK();
6918         return (1);
6919 }
6920
6921
6922 static sctp_assoc_t reneged_asoc_ids[256];
6923 static uint8_t reneged_at = 0;
6924
6925
6926 static void
6927 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6928 {
6929         /*
6930          * We must hunt this association for MBUF's past the cumack (i.e.
6931          * out of order data that we can renege on).
6932          */
6933         struct sctp_association *asoc;
6934         struct sctp_tmit_chunk *chk, *nchk;
6935         uint32_t cumulative_tsn_p1;
6936         struct sctp_queued_to_read *ctl, *nctl;
6937         int cnt, strmat;
6938         uint32_t gap, i;
6939         int fnd = 0;
6940
6941         /* We look for anything larger than the cum-ack + 1 */
6942
6943         asoc = &stcb->asoc;
6944         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6945                 /* none we can reneg on. */
6946                 return;
6947         }
6948         SCTP_STAT_INCR(sctps_protocol_drains_done);
6949         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6950         cnt = 0;
6951         /* First look in the re-assembly queue */
6952         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6953                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6954                         /* Yep it is above cum-ack */
6955                         cnt++;
6956                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6957                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6958                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6959                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6960                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6961                         if (chk->data) {
6962                                 sctp_m_freem(chk->data);
6963                                 chk->data = NULL;
6964                         }
6965                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6966                 }
6967         }
6968         /* Ok that was fun, now we will drain all the inbound streams? */
6969         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6970                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6971                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6972                                 /* Yep it is above cum-ack */
6973                                 cnt++;
6974                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6975                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6976                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6977                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6978                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6979                                 if (ctl->data) {
6980                                         sctp_m_freem(ctl->data);
6981                                         ctl->data = NULL;
6982                                 }
6983                                 sctp_free_remote_addr(ctl->whoFrom);
6984                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6985                                 SCTP_DECR_READQ_COUNT();
6986                         }
6987                 }
6988         }
6989         if (cnt) {
6990                 /* We must back down to see what the new highest is */
6991                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6992                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6993                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6994                                 asoc->highest_tsn_inside_map = i;
6995                                 fnd = 1;
6996                                 break;
6997                         }
6998                 }
6999                 if (!fnd) {
7000                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7001                 }
7002                 /*
7003                  * Question, should we go through the delivery queue? The
7004                  * only reason things are on here is the app not reading OR
7005                  * a p-d-api up. An attacker COULD send enough in to
7006                  * initiate the PD-API and then send a bunch of stuff to
7007                  * other streams... these would wind up on the delivery
7008                  * queue.. and then we would not get to them. But in order
7009                  * to do this I then have to back-track and un-deliver
7010                  * sequence numbers in streams.. el-yucko. I think for now
7011                  * we will NOT look at the delivery queue and leave it to be
7012                  * something to consider later. An alternative would be to
7013                  * abort the P-D-API with a notification and then deliver
7014                  * the data.... Or another method might be to keep track of
7015                  * how many times the situation occurs and if we see a
7016                  * possible attack underway just abort the association.
7017                  */
7018 #ifdef SCTP_DEBUG
7019                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7020 #endif
7021                 /*
7022                  * Now do we need to find a new
7023                  * asoc->highest_tsn_inside_map?
7024                  */
7025                 asoc->last_revoke_count = cnt;
7026                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7027                 /* sa_ignore NO_NULL_CHK */
7028                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7029                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7030                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
7031                 reneged_at++;
7032         }
7033         /*
7034          * Another issue, in un-setting the TSN's in the mapping array we
7035          * DID NOT adjust the highest_tsn marker.  This will cause one of
7036          * two things to occur. It may cause us to do extra work in checking
7037          * for our mapping array movement. More importantly it may cause us
7038          * to SACK every datagram. This may not be a bad thing though since
7039          * we will recover once we get our cum-ack above and all this stuff
7040          * we dumped recovered.
7041          */
7042 }
7043
7044 void
7045 sctp_drain()
7046 {
7047         /*
7048          * We must walk the PCB lists for ALL associations here. The system
7049          * is LOW on MBUF's and needs help. This is where reneging will
7050          * occur. We really hope this does NOT happen!
7051          */
7052         VNET_ITERATOR_DECL(vnet_iter);
7053         VNET_LIST_RLOCK_NOSLEEP();
7054         VNET_FOREACH(vnet_iter) {
7055                 CURVNET_SET(vnet_iter);
7056                 struct sctp_inpcb *inp;
7057                 struct sctp_tcb *stcb;
7058
7059                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7060                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7061 #ifdef VIMAGE
7062                         continue;
7063 #else
7064                         return;
7065 #endif
7066                 }
7067                 SCTP_INP_INFO_RLOCK();
7068                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7069                         /* For each endpoint */
7070                         SCTP_INP_RLOCK(inp);
7071                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7072                                 /* For each association */
7073                                 SCTP_TCB_LOCK(stcb);
7074                                 sctp_drain_mbufs(inp, stcb);
7075                                 SCTP_TCB_UNLOCK(stcb);
7076                         }
7077                         SCTP_INP_RUNLOCK(inp);
7078                 }
7079                 SCTP_INP_INFO_RUNLOCK();
7080                 CURVNET_RESTORE();
7081         }
7082         VNET_LIST_RUNLOCK_NOSLEEP();
7083 }
7084
7085 /*
7086  * start a new iterator
7087  * iterates through all endpoints and associations based on the pcb_state
7088  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7089  * assocs and "ef" (optional) is executed when the iterator completes.
7090  * "inpf" (optional) is executed for each new endpoint as it is being
7091  * iterated through. inpe (optional) is called when the inp completes
7092  * its way through all the stcbs.
7093  */
7094 int
7095 sctp_initiate_iterator(inp_func inpf,
7096     asoc_func af,
7097     inp_func inpe,
7098     uint32_t pcb_state,
7099     uint32_t pcb_features,
7100     uint32_t asoc_state,
7101     void *argp,
7102     uint32_t argi,
7103     end_func ef,
7104     struct sctp_inpcb *s_inp,
7105     uint8_t chunk_output_off)
7106 {
7107         struct sctp_iterator *it = NULL;
7108
7109         if (af == NULL) {
7110                 return (-1);
7111         }
7112         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7113             SCTP_M_ITER);
7114         if (it == NULL) {
7115                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7116                 return (ENOMEM);
7117         }
7118         memset(it, 0, sizeof(*it));
7119         it->function_assoc = af;
7120         it->function_inp = inpf;
7121         if (inpf)
7122                 it->done_current_ep = 0;
7123         else
7124                 it->done_current_ep = 1;
7125         it->function_atend = ef;
7126         it->pointer = argp;
7127         it->val = argi;
7128         it->pcb_flags = pcb_state;
7129         it->pcb_features = pcb_features;
7130         it->asoc_state = asoc_state;
7131         it->function_inp_end = inpe;
7132         it->no_chunk_output = chunk_output_off;
7133         it->vn = curvnet;
7134         if (s_inp) {
7135                 /* Assume lock is held here */
7136                 it->inp = s_inp;
7137                 SCTP_INP_INCR_REF(it->inp);
7138                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7139         } else {
7140                 SCTP_INP_INFO_RLOCK();
7141                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7142                 if (it->inp) {
7143                         SCTP_INP_INCR_REF(it->inp);
7144                 }
7145                 SCTP_INP_INFO_RUNLOCK();
7146                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7147
7148         }
7149         SCTP_IPI_ITERATOR_WQ_LOCK();
7150
7151         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7152         if (sctp_it_ctl.iterator_running == 0) {
7153                 sctp_wakeup_iterator();
7154         }
7155         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7156         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7157         return (0);
7158 }