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