sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, 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 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #if defined(INET) || defined(INET6)
  50 #include <netinet/udp.h>
  51 #endif
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99         SCTP_INP_INFO_RUNLOCK();
 100 }
 101
 102 /*-
 103  * Addresses are added to VRF's (Virtual Router's). For BSD we
 104  * have only the default VRF 0. We maintain a hash list of
 105  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 106  * these has a list of addresses. When we add a new address
 107  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 108  * not exist we create it and add it to the list of IFN's
 109  * within the VRF. Once we have the sctp_ifn, we add the
 110  * address to the list. So we look something like:
 111  *
 112  * hash-vrf-table
 113  *   vrf-> ifn-> ifn -> ifn
 114  *   vrf    |
 115  *    ...   +--ifa-> ifa -> ifa
 116  *   vrf
 117  *
 118  * We keep these separate lists since the SCTP subsystem will
 119  * point to these from its source address selection nets structure.
 120  * When an address is deleted it does not happen right away on
 121  * the SCTP side, it gets scheduled. What we do when a
 122  * delete happens is immediately remove the address from
 123  * the master list and decrement the refcount. As our
 124  * addip iterator works through and frees the src address
 125  * selection pointing to the sctp_ifa, eventually the refcount
 126  * will reach 0 and we will delete it. Note that it is assumed
 127  * that any locking on system level ifn/ifa is done at the
 128  * caller of these functions and these routines will only
 129  * lock the SCTP structures as they add or delete things.
 130  *
 131  * Other notes on VRF concepts.
 132  *  - An endpoint can be in multiple VRF's
 133  *  - An association lives within a VRF and only one VRF.
 134  *  - Any incoming packet we can deduce the VRF for by
 135  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 136  *  - Any downward send call or connect call must supply the
 137  *    VRF via ancillary data or via some sort of set default
 138  *    VRF socket option call (again for BSD no brainer since
 139  *    the VRF is always 0).
 140  *  - An endpoint may add multiple VRF's to it.
 141  *  - Listening sockets can accept associations in any
 142  *    of the VRF's they are in but the assoc will end up
 143  *    in only one VRF (gotten from the packet or connect/send).
 144  *
 145  */
 146
 147 struct sctp_vrf *
 148 sctp_allocate_vrf(int vrf_id)
 149 {
 150         struct sctp_vrf *vrf = NULL;
 151         struct sctp_vrflist *bucket;
 152
 153         /* First allocate the VRF structure */
 154         vrf = sctp_find_vrf(vrf_id);
 155         if (vrf) {
 156                 /* Already allocated */
 157                 return (vrf);
 158         }
 159         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 160             SCTP_M_VRF);
 161         if (vrf == NULL) {
 162                 /* No memory */
 163 #ifdef INVARIANTS
 164                 panic("No memory for VRF:%d", vrf_id);
 165 #endif
 166                 return (NULL);
 167         }
 168         /* setup the VRF */
 169         memset(vrf, 0, sizeof(struct sctp_vrf));
 170         vrf->vrf_id = vrf_id;
 171         LIST_INIT(&vrf->ifnlist);
 172         vrf->total_ifa_count = 0;
 173         vrf->refcount = 0;
 174         /* now also setup table ids */
 175         SCTP_INIT_VRF_TABLEID(vrf);
 176         /* Init the HASH of addresses */
 177         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 178             &vrf->vrf_addr_hashmark);
 179         if (vrf->vrf_addr_hash == NULL) {
 180                 /* No memory */
 181 #ifdef INVARIANTS
 182                 panic("No memory for VRF:%d", vrf_id);
 183 #endif
 184                 SCTP_FREE(vrf, SCTP_M_VRF);
 185                 return (NULL);
 186         }
 187         /* Add it to the hash table */
 188         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 189         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 190         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 191         return (vrf);
 192 }
 193
 194
 195 struct sctp_ifn *
 196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 197 {
 198         struct sctp_ifn *sctp_ifnp;
 199         struct sctp_ifnlist *hash_ifn_head;
 200
 201         /*
 202          * We assume the lock is held for the addresses if that's wrong
 203          * problems could occur :-)
 204          */
 205         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 206         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 207                 if (sctp_ifnp->ifn_index == ifn_index) {
 208                         return (sctp_ifnp);
 209                 }
 210                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 211                         return (sctp_ifnp);
 212                 }
 213         }
 214         return (NULL);
 215 }
 216
 217
 218 struct sctp_vrf *
 219 sctp_find_vrf(uint32_t vrf_id)
 220 {
 221         struct sctp_vrflist *bucket;
 222         struct sctp_vrf *liste;
 223
 224         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 225         LIST_FOREACH(liste, bucket, next_vrf) {
 226                 if (vrf_id == liste->vrf_id) {
 227                         return (liste);
 228                 }
 229         }
 230         return (NULL);
 231 }
 232
 233
 234 void
 235 sctp_free_vrf(struct sctp_vrf *vrf)
 236 {
 237         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 238                 if (vrf->vrf_addr_hash) {
 239                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 240                         vrf->vrf_addr_hash = NULL;
 241                 }
 242                 /* We zero'd the count */
 243                 LIST_REMOVE(vrf, next_vrf);
 244                 SCTP_FREE(vrf, SCTP_M_VRF);
 245                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 246         }
 247 }
 248
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263
 264 void
 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 266 {
 267         struct sctp_ifn *sctp_ifnp;
 268
 269         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 270         if (sctp_ifnp != NULL) {
 271                 sctp_ifnp->ifn_mtu = mtu;
 272         }
 273 }
 274
 275
 276 void
 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 278 {
 279         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 280                 /* We zero'd the count */
 281                 if (sctp_ifap->ifn_p) {
 282                         sctp_free_ifn(sctp_ifap->ifn_p);
 283                 }
 284                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 285                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 286         }
 287 }
 288
 289
 290 static void
 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 292 {
 293         struct sctp_ifn *found;
 294
 295         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 296         if (found == NULL) {
 297                 /* Not in the list.. sorry */
 298                 return;
 299         }
 300         if (hold_addr_lock == 0)
 301                 SCTP_IPI_ADDR_WLOCK();
 302         LIST_REMOVE(sctp_ifnp, next_bucket);
 303         LIST_REMOVE(sctp_ifnp, next_ifn);
 304         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 305             sctp_ifnp->registered_af);
 306         if (hold_addr_lock == 0)
 307                 SCTP_IPI_ADDR_WUNLOCK();
 308         /* Take away the reference, and possibly free it */
 309         sctp_free_ifn(sctp_ifnp);
 310 }
 311
 312
 313 void
 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 315     const char *if_name, uint32_t ifn_index)
 316 {
 317         struct sctp_vrf *vrf;
 318         struct sctp_ifa *sctp_ifap;
 319
 320         SCTP_IPI_ADDR_RLOCK();
 321         vrf = sctp_find_vrf(vrf_id);
 322         if (vrf == NULL) {
 323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 324                 goto out;
 325
 326         }
 327         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 328         if (sctp_ifap == NULL) {
 329                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 330                 goto out;
 331         }
 332         if (sctp_ifap->ifn_p == NULL) {
 333                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 334                 goto out;
 335         }
 336         if (if_name) {
 337                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 338                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 339                             sctp_ifap->ifn_p->ifn_name, if_name);
 340                         goto out;
 341                 }
 342         } else {
 343                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 344                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 345                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 346                         goto out;
 347                 }
 348         }
 349
 350         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 351         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 352 out:
 353         SCTP_IPI_ADDR_RUNLOCK();
 354 }
 355
 356
 357 void
 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 359     const char *if_name, uint32_t ifn_index)
 360 {
 361         struct sctp_vrf *vrf;
 362         struct sctp_ifa *sctp_ifap;
 363
 364         SCTP_IPI_ADDR_RLOCK();
 365         vrf = sctp_find_vrf(vrf_id);
 366         if (vrf == NULL) {
 367                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 368                 goto out;
 369
 370         }
 371         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 372         if (sctp_ifap == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 374                 goto out;
 375         }
 376         if (sctp_ifap->ifn_p == NULL) {
 377                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 378                 goto out;
 379         }
 380         if (if_name) {
 381                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 382                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 383                             sctp_ifap->ifn_p->ifn_name, if_name);
 384                         goto out;
 385                 }
 386         } else {
 387                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 389                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 390                         goto out;
 391                 }
 392         }
 393
 394         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 395         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 396 out:
 397         SCTP_IPI_ADDR_RUNLOCK();
 398 }
 399
 400
 401 /*-
 402  * Add an ifa to an ifn.
 403  * Register the interface as necessary.
 404  * NOTE: ADDR write lock MUST be held.
 405  */
 406 static void
 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 408 {
 409         int ifa_af;
 410
 411         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 412         sctp_ifap->ifn_p = sctp_ifnp;
 413         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 414         /* update address counts */
 415         sctp_ifnp->ifa_count++;
 416         ifa_af = sctp_ifap->address.sa.sa_family;
 417         switch (ifa_af) {
 418 #ifdef INET
 419         case AF_INET:
 420                 sctp_ifnp->num_v4++;
 421                 break;
 422 #endif
 423 #ifdef INET6
 424         case AF_INET6:
 425                 sctp_ifnp->num_v6++;
 426                 break;
 427 #endif
 428         default:
 429                 break;
 430         }
 431         if (sctp_ifnp->ifa_count == 1) {
 432                 /* register the new interface */
 433                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 434                 sctp_ifnp->registered_af = ifa_af;
 435         }
 436 }
 437
 438
 439 /*-
 440  * Remove an ifa from its ifn.
 441  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 442  * the interface based on the remaining address families left.
 443  * NOTE: ADDR write lock MUST be held.
 444  */
 445 static void
 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 447 {
 448         LIST_REMOVE(sctp_ifap, next_ifa);
 449         if (sctp_ifap->ifn_p) {
 450                 /* update address counts */
 451                 sctp_ifap->ifn_p->ifa_count--;
 452                 switch (sctp_ifap->address.sa.sa_family) {
 453 #ifdef INET
 454                 case AF_INET:
 455                         sctp_ifap->ifn_p->num_v4--;
 456                         break;
 457 #endif
 458 #ifdef INET6
 459                 case AF_INET6:
 460                         sctp_ifap->ifn_p->num_v6--;
 461                         break;
 462 #endif
 463                 default:
 464                         break;
 465                 }
 466
 467                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 468                         /* remove the ifn, possibly freeing it */
 469                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 470                 } else {
 471                         /* re-register address family type, if needed */
 472                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 473                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 474                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 475                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 476                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 477                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 478                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 479                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 480                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 481                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 482                         }
 483                         /* free the ifn refcount */
 484                         sctp_free_ifn(sctp_ifap->ifn_p);
 485                 }
 486                 sctp_ifap->ifn_p = NULL;
 487         }
 488 }
 489
 490
 491 struct sctp_ifa *
 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 493     uint32_t ifn_type, const char *if_name, void *ifa,
 494     struct sockaddr *addr, uint32_t ifa_flags,
 495     int dynamic_add)
 496 {
 497         struct sctp_vrf *vrf;
 498         struct sctp_ifn *sctp_ifnp = NULL;
 499         struct sctp_ifa *sctp_ifap = NULL;
 500         struct sctp_ifalist *hash_addr_head;
 501         struct sctp_ifnlist *hash_ifn_head;
 502         uint32_t hash_of_addr;
 503         int new_ifn_af = 0;
 504
 505 #ifdef SCTP_DEBUG
 506         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 507         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 508 #endif
 509         SCTP_IPI_ADDR_WLOCK();
 510         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 511         if (sctp_ifnp) {
 512                 vrf = sctp_ifnp->vrf;
 513         } else {
 514                 vrf = sctp_find_vrf(vrf_id);
 515                 if (vrf == NULL) {
 516                         vrf = sctp_allocate_vrf(vrf_id);
 517                         if (vrf == NULL) {
 518                                 SCTP_IPI_ADDR_WUNLOCK();
 519                                 return (NULL);
 520                         }
 521                 }
 522         }
 523         if (sctp_ifnp == NULL) {
 524                 /*
 525                  * build one and add it, can't hold lock until after malloc
 526                  * done though.
 527                  */
 528                 SCTP_IPI_ADDR_WUNLOCK();
 529                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 530                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 531                 if (sctp_ifnp == NULL) {
 532 #ifdef INVARIANTS
 533                         panic("No memory for IFN");
 534 #endif
 535                         return (NULL);
 536                 }
 537                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 538                 sctp_ifnp->ifn_index = ifn_index;
 539                 sctp_ifnp->ifn_p = ifn;
 540                 sctp_ifnp->ifn_type = ifn_type;
 541                 sctp_ifnp->refcount = 0;
 542                 sctp_ifnp->vrf = vrf;
 543                 atomic_add_int(&vrf->refcount, 1);
 544                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 545                 if (if_name != NULL) {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 547                 } else {
 548                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 549                 }
 550                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 551                 LIST_INIT(&sctp_ifnp->ifalist);
 552                 SCTP_IPI_ADDR_WLOCK();
 553                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 554                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 555                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 556                 new_ifn_af = 1;
 557         }
 558         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 559         if (sctp_ifap) {
 560                 /* Hmm, it already exists? */
 561                 if ((sctp_ifap->ifn_p) &&
 562                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 563                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 564                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 565                             (void *)sctp_ifap);
 566                         if (new_ifn_af) {
 567                                 /* Remove the created one that we don't want */
 568                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 569                         }
 570                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 571                                 /* easy to solve, just switch back to active */
 572                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 573                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 574                                 sctp_ifap->ifn_p = sctp_ifnp;
 575                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 576                         }
 577         exit_stage_left:
 578                         SCTP_IPI_ADDR_WUNLOCK();
 579                         return (sctp_ifap);
 580                 } else {
 581                         if (sctp_ifap->ifn_p) {
 582                                 /*
 583                                  * The last IFN gets the address, remove the
 584                                  * old one
 585                                  */
 586                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 587                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 588                                     sctp_ifap->ifn_p->ifn_index, if_name,
 589                                     ifn_index);
 590                                 /* remove the address from the old ifn */
 591                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 592                                 /* move the address over to the new ifn */
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                                 goto exit_stage_left;
 595                         } else {
 596                                 /* repair ifnp which was NULL ? */
 597                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 598                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 599                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 600                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 601                         }
 602                         goto exit_stage_left;
 603                 }
 604         }
 605         SCTP_IPI_ADDR_WUNLOCK();
 606         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 607         if (sctp_ifap == NULL) {
 608 #ifdef INVARIANTS
 609                 panic("No memory for IFA");
 610 #endif
 611                 return (NULL);
 612         }
 613         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 614         sctp_ifap->ifn_p = sctp_ifnp;
 615         atomic_add_int(&sctp_ifnp->refcount, 1);
 616         sctp_ifap->vrf_id = vrf_id;
 617         sctp_ifap->ifa = ifa;
 618         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 619         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 620         sctp_ifap->flags = ifa_flags;
 621         /* Set scope */
 622         switch (sctp_ifap->address.sa.sa_family) {
 623 #ifdef INET
 624         case AF_INET:
 625                 {
 626                         struct sockaddr_in *sin;
 627
 628                         sin = &sctp_ifap->address.sin;
 629                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 630                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 631                                 sctp_ifap->src_is_loop = 1;
 632                         }
 633                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 634                                 sctp_ifap->src_is_priv = 1;
 635                         }
 636                         sctp_ifnp->num_v4++;
 637                         if (new_ifn_af)
 638                                 new_ifn_af = AF_INET;
 639                         break;
 640                 }
 641 #endif
 642 #ifdef INET6
 643         case AF_INET6:
 644                 {
 645                         /* ok to use deprecated addresses? */
 646                         struct sockaddr_in6 *sin6;
 647
 648                         sin6 = &sctp_ifap->address.sin6;
 649                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 650                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 651                                 sctp_ifap->src_is_loop = 1;
 652                         }
 653                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 654                                 sctp_ifap->src_is_priv = 1;
 655                         }
 656                         sctp_ifnp->num_v6++;
 657                         if (new_ifn_af)
 658                                 new_ifn_af = AF_INET6;
 659                         break;
 660                 }
 661 #endif
 662         default:
 663                 new_ifn_af = 0;
 664                 break;
 665         }
 666         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 667
 668         if ((sctp_ifap->src_is_priv == 0) &&
 669             (sctp_ifap->src_is_loop == 0)) {
 670                 sctp_ifap->src_is_glob = 1;
 671         }
 672         SCTP_IPI_ADDR_WLOCK();
 673         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 674         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 675         sctp_ifap->refcount = 1;
 676         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 677         sctp_ifnp->ifa_count++;
 678         vrf->total_ifa_count++;
 679         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 680         if (new_ifn_af) {
 681                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 682                 sctp_ifnp->registered_af = new_ifn_af;
 683         }
 684         SCTP_IPI_ADDR_WUNLOCK();
 685         if (dynamic_add) {
 686                 /*
 687                  * Bump up the refcount so that when the timer completes it
 688                  * will drop back down.
 689                  */
 690                 struct sctp_laddr *wi;
 691
 692                 atomic_add_int(&sctp_ifap->refcount, 1);
 693                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 694                 if (wi == NULL) {
 695                         /*
 696                          * Gak, what can we do? We have lost an address
 697                          * change can you say HOSED?
 698                          */
 699                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 700                         /* Opps, must decrement the count */
 701                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 702                             if_name);
 703                         return (NULL);
 704                 }
 705                 SCTP_INCR_LADDR_COUNT();
 706                 bzero(wi, sizeof(*wi));
 707                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 708                 wi->ifa = sctp_ifap;
 709                 wi->action = SCTP_ADD_IP_ADDRESS;
 710
 711                 SCTP_WQ_ADDR_LOCK();
 712                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 713                 SCTP_WQ_ADDR_UNLOCK();
 714
 715                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 716                     (struct sctp_inpcb *)NULL,
 717                     (struct sctp_tcb *)NULL,
 718                     (struct sctp_nets *)NULL);
 719         } else {
 720                 /* it's ready for use */
 721                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 722         }
 723         return (sctp_ifap);
 724 }
 725
 726 void
 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 728     uint32_t ifn_index, const char *if_name)
 729 {
 730         struct sctp_vrf *vrf;
 731         struct sctp_ifa *sctp_ifap = NULL;
 732
 733         SCTP_IPI_ADDR_WLOCK();
 734         vrf = sctp_find_vrf(vrf_id);
 735         if (vrf == NULL) {
 736                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 737                 goto out_now;
 738         }
 739 #ifdef SCTP_DEBUG
 740         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 741         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 742 #endif
 743         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 744         if (sctp_ifap) {
 745                 /* Validate the delete */
 746                 if (sctp_ifap->ifn_p) {
 747                         int valid = 0;
 748
 749                         /*-
 750                          * The name has priority over the ifn_index
 751                          * if its given. We do this especially for
 752                          * panda who might recycle indexes fast.
 753                          */
 754                         if (if_name) {
 755                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 756                                         /* They match its a correct delete */
 757                                         valid = 1;
 758                                 }
 759                         }
 760                         if (!valid) {
 761                                 /* last ditch check ifn_index */
 762                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 763                                         valid = 1;
 764                                 }
 765                         }
 766                         if (!valid) {
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 768                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 770                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 771                                 SCTP_IPI_ADDR_WUNLOCK();
 772                                 return;
 773                         }
 774                 }
 775                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 776                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 777                 /*
 778                  * We don't set the flag. This means that the structure will
 779                  * hang around in EP's that have bound specific to it until
 780                  * they close. This gives us TCP like behavior if someone
 781                  * removes an address (or for that matter adds it right
 782                  * back).
 783                  */
 784                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 785                 vrf->total_ifa_count--;
 786                 LIST_REMOVE(sctp_ifap, next_bucket);
 787                 sctp_remove_ifa_from_ifn(sctp_ifap);
 788         }
 789 #ifdef SCTP_DEBUG
 790         else {
 791                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 792                     ifn_index);
 793                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 794         }
 795 #endif
 796
 797 out_now:
 798         SCTP_IPI_ADDR_WUNLOCK();
 799         if (sctp_ifap) {
 800                 struct sctp_laddr *wi;
 801
 802                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 803                 if (wi == NULL) {
 804                         /*
 805                          * Gak, what can we do? We have lost an address
 806                          * change can you say HOSED?
 807                          */
 808                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 809
 810                         /* Oops, must decrement the count */
 811                         sctp_free_ifa(sctp_ifap);
 812                         return;
 813                 }
 814                 SCTP_INCR_LADDR_COUNT();
 815                 bzero(wi, sizeof(*wi));
 816                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 817                 wi->ifa = sctp_ifap;
 818                 wi->action = SCTP_DEL_IP_ADDRESS;
 819                 SCTP_WQ_ADDR_LOCK();
 820                 /*
 821                  * Should this really be a tailq? As it is we will process
 822                  * the newest first :-0
 823                  */
 824                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 825                 SCTP_WQ_ADDR_UNLOCK();
 826
 827                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 828                     (struct sctp_inpcb *)NULL,
 829                     (struct sctp_tcb *)NULL,
 830                     (struct sctp_nets *)NULL);
 831         }
 832         return;
 833 }
 834
 835
 836 static int
 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 838 {
 839         int loopback_scope;
 840
 841 #if defined(INET)
 842         int ipv4_local_scope, ipv4_addr_legal;
 843
 844 #endif
 845 #if defined(INET6)
 846         int local_scope, site_scope, ipv6_addr_legal;
 847
 848 #endif
 849         struct sctp_vrf *vrf;
 850         struct sctp_ifn *sctp_ifn;
 851         struct sctp_ifa *sctp_ifa;
 852
 853         loopback_scope = stcb->asoc.scope.loopback_scope;
 854 #if defined(INET)
 855         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 856         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 857 #endif
 858 #if defined(INET6)
 859         local_scope = stcb->asoc.scope.local_scope;
 860         site_scope = stcb->asoc.scope.site_scope;
 861         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 862 #endif
 863
 864         SCTP_IPI_ADDR_RLOCK();
 865         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 866         if (vrf == NULL) {
 867                 /* no vrf, no addresses */
 868                 SCTP_IPI_ADDR_RUNLOCK();
 869                 return (0);
 870         }
 871         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 872                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 873                         if ((loopback_scope == 0) &&
 874                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 875                                 continue;
 876                         }
 877                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 878                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 879                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 880                                         /*
 881                                          * We allow pending addresses, where
 882                                          * we have sent an asconf-add to be
 883                                          * considered valid.
 884                                          */
 885                                         continue;
 886                                 }
 887                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 888                                         continue;
 889                                 }
 890                                 switch (sctp_ifa->address.sa.sa_family) {
 891 #ifdef INET
 892                                 case AF_INET:
 893                                         if (ipv4_addr_legal) {
 894                                                 struct sockaddr_in *sin,
 895                                                            *rsin;
 896
 897                                                 sin = &sctp_ifa->address.sin;
 898                                                 rsin = (struct sockaddr_in *)to;
 899                                                 if ((ipv4_local_scope == 0) &&
 900                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 901                                                         continue;
 902                                                 }
 903                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 904                                                     &sin->sin_addr) != 0) {
 905                                                         continue;
 906                                                 }
 907                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 908                                                         SCTP_IPI_ADDR_RUNLOCK();
 909                                                         return (1);
 910                                                 }
 911                                         }
 912                                         break;
 913 #endif
 914 #ifdef INET6
 915                                 case AF_INET6:
 916                                         if (ipv6_addr_legal) {
 917                                                 struct sockaddr_in6 *sin6,
 918                                                             *rsin6;
 919
 920                                                 sin6 = &sctp_ifa->address.sin6;
 921                                                 rsin6 = (struct sockaddr_in6 *)to;
 922                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 923                                                     &sin6->sin6_addr) != 0) {
 924                                                         continue;
 925                                                 }
 926                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 927                                                         if (local_scope == 0)
 928                                                                 continue;
 929                                                         if (sin6->sin6_scope_id == 0) {
 930                                                                 if (sa6_recoverscope(sin6) != 0)
 931                                                                         continue;
 932                                                         }
 933                                                 }
 934                                                 if ((site_scope == 0) &&
 935                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 936                                                         continue;
 937                                                 }
 938                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 939                                                         SCTP_IPI_ADDR_RUNLOCK();
 940                                                         return (1);
 941                                                 }
 942                                         }
 943                                         break;
 944 #endif
 945                                 default:
 946                                         /* TSNH */
 947                                         break;
 948                                 }
 949                         }
 950                 }
 951         } else {
 952                 struct sctp_laddr *laddr;
 953
 954                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 955                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 956                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 957                                 continue;
 958                         }
 959                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 960                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 961                                 /*
 962                                  * We allow pending addresses, where we have
 963                                  * sent an asconf-add to be considered
 964                                  * valid.
 965                                  */
 966                                 continue;
 967                         }
 968                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 969                                 continue;
 970                         }
 971                         switch (to->sa_family) {
 972 #ifdef INET
 973                         case AF_INET:
 974                                 {
 975                                         struct sockaddr_in *sin, *rsin;
 976
 977                                         sin = &laddr->ifa->address.sin;
 978                                         rsin = (struct sockaddr_in *)to;
 979                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 980                                                 SCTP_IPI_ADDR_RUNLOCK();
 981                                                 return (1);
 982                                         }
 983                                         break;
 984                                 }
 985 #endif
 986 #ifdef INET6
 987                         case AF_INET6:
 988                                 {
 989                                         struct sockaddr_in6 *sin6, *rsin6;
 990
 991                                         sin6 = &laddr->ifa->address.sin6;
 992                                         rsin6 = (struct sockaddr_in6 *)to;
 993                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 994                                                 SCTP_IPI_ADDR_RUNLOCK();
 995                                                 return (1);
 996                                         }
 997                                         break;
 998                                 }
 999
1000 #endif
1001                         default:
1002                                 /* TSNH */
1003                                 break;
1004                         }
1005
1006                 }
1007         }
1008         SCTP_IPI_ADDR_RUNLOCK();
1009         return (0);
1010 }
1011
1012
1013 static struct sctp_tcb *
1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1015     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1016 {
1017         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1018         /*
1019          * If we support the TCP model, then we must now dig through to see
1020          * if we can find our endpoint in the list of tcp ep's.
1021          */
1022         uint16_t lport, rport;
1023         struct sctppcbhead *ephead;
1024         struct sctp_inpcb *inp;
1025         struct sctp_laddr *laddr;
1026         struct sctp_tcb *stcb;
1027         struct sctp_nets *net;
1028
1029         if ((to == NULL) || (from == NULL)) {
1030                 return (NULL);
1031         }
1032         switch (to->sa_family) {
1033 #ifdef INET
1034         case AF_INET:
1035                 if (from->sa_family == AF_INET) {
1036                         lport = ((struct sockaddr_in *)to)->sin_port;
1037                         rport = ((struct sockaddr_in *)from)->sin_port;
1038                 } else {
1039                         return (NULL);
1040                 }
1041                 break;
1042 #endif
1043 #ifdef INET6
1044         case AF_INET6:
1045                 if (from->sa_family == AF_INET6) {
1046                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1047                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1048                 } else {
1049                         return (NULL);
1050                 }
1051                 break;
1052 #endif
1053         default:
1054                 return (NULL);
1055         }
1056         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1057         /*
1058          * Ok now for each of the guys in this bucket we must look and see:
1059          * - Does the remote port match. - Does there single association's
1060          * addresses match this address (to). If so we update p_ep to point
1061          * to this ep and return the tcb from it.
1062          */
1063         LIST_FOREACH(inp, ephead, sctp_hash) {
1064                 SCTP_INP_RLOCK(inp);
1065                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 if (lport != inp->sctp_lport) {
1070                         SCTP_INP_RUNLOCK(inp);
1071                         continue;
1072                 }
1073                 switch (to->sa_family) {
1074 #ifdef INET
1075                 case AF_INET:
1076                         {
1077                                 struct sockaddr_in *sin;
1078
1079                                 sin = (struct sockaddr_in *)to;
1080                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1081                                     &sin->sin_addr) != 0) {
1082                                         SCTP_INP_RUNLOCK(inp);
1083                                         continue;
1084                                 }
1085                                 break;
1086                         }
1087 #endif
1088 #ifdef INET6
1089                 case AF_INET6:
1090                         {
1091                                 struct sockaddr_in6 *sin6;
1092
1093                                 sin6 = (struct sockaddr_in6 *)to;
1094                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1095                                     &sin6->sin6_addr) != 0) {
1096                                         SCTP_INP_RUNLOCK(inp);
1097                                         continue;
1098                                 }
1099                                 break;
1100                         }
1101 #endif
1102                 default:
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 if (inp->def_vrf_id != vrf_id) {
1107                         SCTP_INP_RUNLOCK(inp);
1108                         continue;
1109                 }
1110                 /* check to see if the ep has one of the addresses */
1111                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1112                         /* We are NOT bound all, so look further */
1113                         int match = 0;
1114
1115                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1116
1117                                 if (laddr->ifa == NULL) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123                                         continue;
1124                                 }
1125                                 if (laddr->ifa->address.sa.sa_family ==
1126                                     to->sa_family) {
1127                                         /* see if it matches */
1128 #ifdef INET
1129                                         if (from->sa_family == AF_INET) {
1130                                                 struct sockaddr_in *intf_addr,
1131                                                            *sin;
1132
1133                                                 intf_addr = &laddr->ifa->address.sin;
1134                                                 sin = (struct sockaddr_in *)to;
1135                                                 if (sin->sin_addr.s_addr ==
1136                                                     intf_addr->sin_addr.s_addr) {
1137                                                         match = 1;
1138                                                         break;
1139                                                 }
1140                                         }
1141 #endif
1142 #ifdef INET6
1143                                         if (from->sa_family == AF_INET6) {
1144                                                 struct sockaddr_in6 *intf_addr6;
1145                                                 struct sockaddr_in6 *sin6;
1146
1147                                                 sin6 = (struct sockaddr_in6 *)
1148                                                     to;
1149                                                 intf_addr6 = &laddr->ifa->address.sin6;
1150
1151                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152                                                     intf_addr6)) {
1153                                                         match = 1;
1154                                                         break;
1155                                                 }
1156                                         }
1157 #endif
1158                                 }
1159                         }
1160                         if (match == 0) {
1161                                 /* This endpoint does not have this address */
1162                                 SCTP_INP_RUNLOCK(inp);
1163                                 continue;
1164                         }
1165                 }
1166                 /*
1167                  * Ok if we hit here the ep has the address, does it hold
1168                  * the tcb?
1169                  */
1170                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172                 if (stcb == NULL) {
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 SCTP_TCB_LOCK(stcb);
1177                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (stcb->rport != rport) {
1183                         /* remote port does not match. */
1184                         SCTP_TCB_UNLOCK(stcb);
1185                         SCTP_INP_RUNLOCK(inp);
1186                         continue;
1187                 }
1188                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189                         SCTP_TCB_UNLOCK(stcb);
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194                         SCTP_TCB_UNLOCK(stcb);
1195                         SCTP_INP_RUNLOCK(inp);
1196                         continue;
1197                 }
1198                 /* Does this TCB have a matching address? */
1199                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200
1201                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202                                 /* not the same family, can't be a match */
1203                                 continue;
1204                         }
1205                         switch (from->sa_family) {
1206 #ifdef INET
1207                         case AF_INET:
1208                                 {
1209                                         struct sockaddr_in *sin, *rsin;
1210
1211                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1212                                         rsin = (struct sockaddr_in *)from;
1213                                         if (sin->sin_addr.s_addr ==
1214                                             rsin->sin_addr.s_addr) {
1215                                                 /* found it */
1216                                                 if (netp != NULL) {
1217                                                         *netp = net;
1218                                                 }
1219                                                 /*
1220                                                  * Update the endpoint
1221                                                  * pointer
1222                                                  */
1223                                                 *inp_p = inp;
1224                                                 SCTP_INP_RUNLOCK(inp);
1225                                                 return (stcb);
1226                                         }
1227                                         break;
1228                                 }
1229 #endif
1230 #ifdef INET6
1231                         case AF_INET6:
1232                                 {
1233                                         struct sockaddr_in6 *sin6, *rsin6;
1234
1235                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236                                         rsin6 = (struct sockaddr_in6 *)from;
1237                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238                                             rsin6)) {
1239                                                 /* found it */
1240                                                 if (netp != NULL) {
1241                                                         *netp = net;
1242                                                 }
1243                                                 /*
1244                                                  * Update the endpoint
1245                                                  * pointer
1246                                                  */
1247                                                 *inp_p = inp;
1248                                                 SCTP_INP_RUNLOCK(inp);
1249                                                 return (stcb);
1250                                         }
1251                                         break;
1252                                 }
1253 #endif
1254                         default:
1255                                 /* TSNH */
1256                                 break;
1257                         }
1258                 }
1259                 SCTP_TCB_UNLOCK(stcb);
1260                 SCTP_INP_RUNLOCK(inp);
1261         }
1262         return (NULL);
1263 }
1264
1265
1266 /*
1267  * rules for use
1268  *
1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272  * NULL.
1273  */
1274
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279         struct sctpasochead *head;
1280         struct sctp_inpcb *inp;
1281         struct sctp_tcb *stcb = NULL;
1282         struct sctp_nets *net;
1283         uint16_t rport;
1284
1285         inp = *inp_p;
1286         switch (remote->sa_family) {
1287 #ifdef INET
1288         case AF_INET:
1289                 rport = (((struct sockaddr_in *)remote)->sin_port);
1290                 break;
1291 #endif
1292 #ifdef INET6
1293         case AF_INET6:
1294                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295                 break;
1296 #endif
1297         default:
1298                 return (NULL);
1299         }
1300         if (locked_tcb) {
1301                 /*
1302                  * UN-lock so we can do proper locking here this occurs when
1303                  * called from load_addresses_from_init.
1304                  */
1305                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306                 SCTP_TCB_UNLOCK(locked_tcb);
1307         }
1308         SCTP_INP_INFO_RLOCK();
1309         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311                 /*-
1312                  * Now either this guy is our listener or it's the
1313                  * connector. If it is the one that issued the connect, then
1314                  * it's only chance is to be the first TCB in the list. If
1315                  * it is the acceptor, then do the special_lookup to hash
1316                  * and find the real inp.
1317                  */
1318                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1319                         /* to is peer addr, from is my addr */
1320                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321                             netp, inp->def_vrf_id);
1322                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1323                                 /* we have a locked tcb, lower refcount */
1324                                 SCTP_INP_DECR_REF(inp);
1325                         }
1326                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328                                 SCTP_TCB_LOCK(locked_tcb);
1329                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331                         }
1332                         SCTP_INP_INFO_RUNLOCK();
1333                         return (stcb);
1334                 } else {
1335                         SCTP_INP_WLOCK(inp);
1336                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337                                 goto null_return;
1338                         }
1339                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340                         if (stcb == NULL) {
1341                                 goto null_return;
1342                         }
1343                         SCTP_TCB_LOCK(stcb);
1344
1345                         if (stcb->rport != rport) {
1346                                 /* remote port does not match. */
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355                                 SCTP_TCB_UNLOCK(stcb);
1356                                 goto null_return;
1357                         }
1358                         /* now look at the list of remote addresses */
1359                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1362                                         panic("Corrupt net list");
1363                                 }
1364 #endif
1365                                 if (net->ro._l_addr.sa.sa_family !=
1366                                     remote->sa_family) {
1367                                         /* not the same family */
1368                                         continue;
1369                                 }
1370                                 switch (remote->sa_family) {
1371 #ifdef INET
1372                                 case AF_INET:
1373                                         {
1374                                                 struct sockaddr_in *sin,
1375                                                            *rsin;
1376
1377                                                 sin = (struct sockaddr_in *)
1378                                                     &net->ro._l_addr;
1379                                                 rsin = (struct sockaddr_in *)remote;
1380                                                 if (sin->sin_addr.s_addr ==
1381                                                     rsin->sin_addr.s_addr) {
1382                                                         /* found it */
1383                                                         if (netp != NULL) {
1384                                                                 *netp = net;
1385                                                         }
1386                                                         if (locked_tcb == NULL) {
1387                                                                 SCTP_INP_DECR_REF(inp);
1388                                                         } else if (locked_tcb != stcb) {
1389                                                                 SCTP_TCB_LOCK(locked_tcb);
1390                                                         }
1391                                                         if (locked_tcb) {
1392                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393                                                         }
1394                                                         SCTP_INP_WUNLOCK(inp);
1395                                                         SCTP_INP_INFO_RUNLOCK();
1396                                                         return (stcb);
1397                                                 }
1398                                                 break;
1399                                         }
1400 #endif
1401 #ifdef INET6
1402                                 case AF_INET6:
1403                                         {
1404                                                 struct sockaddr_in6 *sin6,
1405                                                             *rsin6;
1406
1407                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408                                                 rsin6 = (struct sockaddr_in6 *)remote;
1409                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410                                                     rsin6)) {
1411                                                         /* found it */
1412                                                         if (netp != NULL) {
1413                                                                 *netp = net;
1414                                                         }
1415                                                         if (locked_tcb == NULL) {
1416                                                                 SCTP_INP_DECR_REF(inp);
1417                                                         } else if (locked_tcb != stcb) {
1418                                                                 SCTP_TCB_LOCK(locked_tcb);
1419                                                         }
1420                                                         if (locked_tcb) {
1421                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422                                                         }
1423                                                         SCTP_INP_WUNLOCK(inp);
1424                                                         SCTP_INP_INFO_RUNLOCK();
1425                                                         return (stcb);
1426                                                 }
1427                                                 break;
1428                                         }
1429 #endif
1430                                 default:
1431                                         /* TSNH */
1432                                         break;
1433                                 }
1434                         }
1435                         SCTP_TCB_UNLOCK(stcb);
1436                 }
1437         } else {
1438                 SCTP_INP_WLOCK(inp);
1439                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440                         goto null_return;
1441                 }
1442                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443                     inp->sctp_hashmark)];
1444                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1445                         if (stcb->rport != rport) {
1446                                 /* remote port does not match */
1447                                 continue;
1448                         }
1449                         SCTP_TCB_LOCK(stcb);
1450                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1455                                 SCTP_TCB_UNLOCK(stcb);
1456                                 continue;
1457                         }
1458                         /* now look at the list of remote addresses */
1459                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1460 #ifdef INVARIANTS
1461                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1462                                         panic("Corrupt net list");
1463                                 }
1464 #endif
1465                                 if (net->ro._l_addr.sa.sa_family !=
1466                                     remote->sa_family) {
1467                                         /* not the same family */
1468                                         continue;
1469                                 }
1470                                 switch (remote->sa_family) {
1471 #ifdef INET
1472                                 case AF_INET:
1473                                         {
1474                                                 struct sockaddr_in *sin,
1475                                                            *rsin;
1476
1477                                                 sin = (struct sockaddr_in *)
1478                                                     &net->ro._l_addr;
1479                                                 rsin = (struct sockaddr_in *)remote;
1480                                                 if (sin->sin_addr.s_addr ==
1481                                                     rsin->sin_addr.s_addr) {
1482                                                         /* found it */
1483                                                         if (netp != NULL) {
1484                                                                 *netp = net;
1485                                                         }
1486                                                         if (locked_tcb == NULL) {
1487                                                                 SCTP_INP_DECR_REF(inp);
1488                                                         } else if (locked_tcb != stcb) {
1489                                                                 SCTP_TCB_LOCK(locked_tcb);
1490                                                         }
1491                                                         if (locked_tcb) {
1492                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1493                                                         }
1494                                                         SCTP_INP_WUNLOCK(inp);
1495                                                         SCTP_INP_INFO_RUNLOCK();
1496                                                         return (stcb);
1497                                                 }
1498                                                 break;
1499                                         }
1500 #endif
1501 #ifdef INET6
1502                                 case AF_INET6:
1503                                         {
1504                                                 struct sockaddr_in6 *sin6,
1505                                                             *rsin6;
1506
1507                                                 sin6 = (struct sockaddr_in6 *)
1508                                                     &net->ro._l_addr;
1509                                                 rsin6 = (struct sockaddr_in6 *)remote;
1510                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1511                                                     rsin6)) {
1512                                                         /* found it */
1513                                                         if (netp != NULL) {
1514                                                                 *netp = net;
1515                                                         }
1516                                                         if (locked_tcb == NULL) {
1517                                                                 SCTP_INP_DECR_REF(inp);
1518                                                         } else if (locked_tcb != stcb) {
1519                                                                 SCTP_TCB_LOCK(locked_tcb);
1520                                                         }
1521                                                         if (locked_tcb) {
1522                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1523                                                         }
1524                                                         SCTP_INP_WUNLOCK(inp);
1525                                                         SCTP_INP_INFO_RUNLOCK();
1526                                                         return (stcb);
1527                                                 }
1528                                                 break;
1529                                         }
1530 #endif
1531                                 default:
1532                                         /* TSNH */
1533                                         break;
1534                                 }
1535                         }
1536                         SCTP_TCB_UNLOCK(stcb);
1537                 }
1538         }
1539 null_return:
1540         /* clean up for returning null */
1541         if (locked_tcb) {
1542                 SCTP_TCB_LOCK(locked_tcb);
1543                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1544         }
1545         SCTP_INP_WUNLOCK(inp);
1546         SCTP_INP_INFO_RUNLOCK();
1547         /* not found */
1548         return (NULL);
1549 }
1550
1551
1552 /*
1553  * Find an association for a specific endpoint using the association id given
1554  * out in the COMM_UP notification
1555  */
1556 struct sctp_tcb *
1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1558 {
1559         /*
1560          * Use my the assoc_id to find a endpoint
1561          */
1562         struct sctpasochead *head;
1563         struct sctp_tcb *stcb;
1564         uint32_t id;
1565
1566         if (inp == NULL) {
1567                 SCTP_PRINTF("TSNH ep_associd\n");
1568                 return (NULL);
1569         }
1570         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1571                 SCTP_PRINTF("TSNH ep_associd0\n");
1572                 return (NULL);
1573         }
1574         id = (uint32_t) asoc_id;
1575         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1576         if (head == NULL) {
1577                 /* invalid id TSNH */
1578                 SCTP_PRINTF("TSNH ep_associd1\n");
1579                 return (NULL);
1580         }
1581         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1582                 if (stcb->asoc.assoc_id == id) {
1583                         if (inp != stcb->sctp_ep) {
1584                                 /*
1585                                  * some other guy has the same id active (id
1586                                  * collision ??).
1587                                  */
1588                                 SCTP_PRINTF("TSNH ep_associd2\n");
1589                                 continue;
1590                         }
1591                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1592                                 continue;
1593                         }
1594                         if (want_lock) {
1595                                 SCTP_TCB_LOCK(stcb);
1596                         }
1597                         return (stcb);
1598                 }
1599         }
1600         return (NULL);
1601 }
1602
1603
1604 struct sctp_tcb *
1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1606 {
1607         struct sctp_tcb *stcb;
1608
1609         SCTP_INP_RLOCK(inp);
1610         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1611         SCTP_INP_RUNLOCK(inp);
1612         return (stcb);
1613 }
1614
1615
1616 /*
1617  * Endpoint probe expects that the INP_INFO is locked.
1618  */
1619 static struct sctp_inpcb *
1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1621     uint16_t lport, uint32_t vrf_id)
1622 {
1623         struct sctp_inpcb *inp;
1624         struct sctp_laddr *laddr;
1625
1626 #ifdef INET
1627         struct sockaddr_in *sin;
1628
1629 #endif
1630 #ifdef INET6
1631         struct sockaddr_in6 *sin6;
1632         struct sockaddr_in6 *intf_addr6;
1633
1634 #endif
1635         int fnd;
1636
1637 #ifdef INET
1638         sin = NULL;
1639 #endif
1640 #ifdef INET6
1641         sin6 = NULL;
1642 #endif
1643         switch (nam->sa_family) {
1644 #ifdef INET
1645         case AF_INET:
1646                 sin = (struct sockaddr_in *)nam;
1647                 break;
1648 #endif
1649 #ifdef INET6
1650         case AF_INET6:
1651                 sin6 = (struct sockaddr_in6 *)nam;
1652                 break;
1653 #endif
1654         default:
1655                 /* unsupported family */
1656                 return (NULL);
1657         }
1658
1659         if (head == NULL)
1660                 return (NULL);
1661
1662         LIST_FOREACH(inp, head, sctp_hash) {
1663                 SCTP_INP_RLOCK(inp);
1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665                         SCTP_INP_RUNLOCK(inp);
1666                         continue;
1667                 }
1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1669                     (inp->sctp_lport == lport)) {
1670                         /* got it */
1671                         switch (nam->sa_family) {
1672 #ifdef INET
1673                         case AF_INET:
1674                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1675                                     SCTP_IPV6_V6ONLY(inp)) {
1676                                         /*
1677                                          * IPv4 on a IPv6 socket with ONLY
1678                                          * IPv6 set
1679                                          */
1680                                         SCTP_INP_RUNLOCK(inp);
1681                                         continue;
1682                                 }
1683                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1684                                     &sin->sin_addr) != 0) {
1685                                         SCTP_INP_RUNLOCK(inp);
1686                                         continue;
1687                                 }
1688                                 break;
1689 #endif
1690 #ifdef INET6
1691                         case AF_INET6:
1692                                 /*
1693                                  * A V6 address and the endpoint is NOT
1694                                  * bound V6
1695                                  */
1696                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1697                                         SCTP_INP_RUNLOCK(inp);
1698                                         continue;
1699                                 }
1700                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1701                                     &sin6->sin6_addr) != 0) {
1702                                         SCTP_INP_RUNLOCK(inp);
1703                                         continue;
1704                                 }
1705                                 break;
1706 #endif
1707                         default:
1708                                 break;
1709                         }
1710                         /* does a VRF id match? */
1711                         fnd = 0;
1712                         if (inp->def_vrf_id == vrf_id)
1713                                 fnd = 1;
1714
1715                         SCTP_INP_RUNLOCK(inp);
1716                         if (!fnd)
1717                                 continue;
1718                         return (inp);
1719                 }
1720                 SCTP_INP_RUNLOCK(inp);
1721         }
1722         switch (nam->sa_family) {
1723 #ifdef INET
1724         case AF_INET:
1725                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1726                         /* Can't hunt for one that has no address specified */
1727                         return (NULL);
1728                 }
1729                 break;
1730 #endif
1731 #ifdef INET6
1732         case AF_INET6:
1733                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1734                         /* Can't hunt for one that has no address specified */
1735                         return (NULL);
1736                 }
1737                 break;
1738 #endif
1739         default:
1740                 break;
1741         }
1742         /*
1743          * ok, not bound to all so see if we can find a EP bound to this
1744          * address.
1745          */
1746         LIST_FOREACH(inp, head, sctp_hash) {
1747                 SCTP_INP_RLOCK(inp);
1748                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1749                         SCTP_INP_RUNLOCK(inp);
1750                         continue;
1751                 }
1752                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1753                         SCTP_INP_RUNLOCK(inp);
1754                         continue;
1755                 }
1756                 /*
1757                  * Ok this could be a likely candidate, look at all of its
1758                  * addresses
1759                  */
1760                 if (inp->sctp_lport != lport) {
1761                         SCTP_INP_RUNLOCK(inp);
1762                         continue;
1763                 }
1764                 /* does a VRF id match? */
1765                 fnd = 0;
1766                 if (inp->def_vrf_id == vrf_id)
1767                         fnd = 1;
1768
1769                 if (!fnd) {
1770                         SCTP_INP_RUNLOCK(inp);
1771                         continue;
1772                 }
1773                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1774                         if (laddr->ifa == NULL) {
1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1776                                     __func__);
1777                                 continue;
1778                         }
1779                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1780                             (void *)laddr->ifa);
1781                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1782                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1783                                 continue;
1784                         }
1785                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1786                                 /* possible, see if it matches */
1787                                 switch (nam->sa_family) {
1788 #ifdef INET
1789                                 case AF_INET:
1790                                         if (sin->sin_addr.s_addr ==
1791                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1792                                                 SCTP_INP_RUNLOCK(inp);
1793                                                 return (inp);
1794                                         }
1795                                         break;
1796 #endif
1797 #ifdef INET6
1798                                 case AF_INET6:
1799                                         intf_addr6 = &laddr->ifa->address.sin6;
1800                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1801                                             intf_addr6)) {
1802                                                 SCTP_INP_RUNLOCK(inp);
1803                                                 return (inp);
1804                                         }
1805                                         break;
1806 #endif
1807                                 }
1808                         }
1809                 }
1810                 SCTP_INP_RUNLOCK(inp);
1811         }
1812         return (NULL);
1813 }
1814
1815
1816 static struct sctp_inpcb *
1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1818 {
1819         struct sctppcbhead *head;
1820         struct sctp_inpcb *t_inp;
1821         int fnd;
1822
1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1824             SCTP_BASE_INFO(hashmark))];
1825         LIST_FOREACH(t_inp, head, sctp_hash) {
1826                 if (t_inp->sctp_lport != lport) {
1827                         continue;
1828                 }
1829                 /* is it in the VRF in question */
1830                 fnd = 0;
1831                 if (t_inp->def_vrf_id == vrf_id)
1832                         fnd = 1;
1833                 if (!fnd)
1834                         continue;
1835
1836                 /* This one is in use. */
1837                 /* check the v6/v4 binding issue */
1838                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1839                     SCTP_IPV6_V6ONLY(t_inp)) {
1840                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841                                 /* collision in V6 space */
1842                                 return (t_inp);
1843                         } else {
1844                                 /* inp is BOUND_V4 no conflict */
1845                                 continue;
1846                         }
1847                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1848                         /* t_inp is bound v4 and v6, conflict always */
1849                         return (t_inp);
1850                 } else {
1851                         /* t_inp is bound only V4 */
1852                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1853                             SCTP_IPV6_V6ONLY(inp)) {
1854                                 /* no conflict */
1855                                 continue;
1856                         }
1857                         /* else fall through to conflict */
1858                 }
1859                 return (t_inp);
1860         }
1861         return (NULL);
1862 }
1863
1864
1865 int
1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1867 {
1868         /* For 1-2-1 with port reuse */
1869         struct sctppcbhead *head;
1870         struct sctp_inpcb *tinp, *ninp;
1871
1872         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1873                 /* only works with port reuse on */
1874                 return (-1);
1875         }
1876         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1877                 return (0);
1878         }
1879         SCTP_INP_RUNLOCK(inp);
1880         SCTP_INP_INFO_WLOCK();
1881         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1882             SCTP_BASE_INFO(hashmark))];
1883         /* Kick out all non-listeners to the TCP hash */
1884         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1885                 if (tinp->sctp_lport != inp->sctp_lport) {
1886                         continue;
1887                 }
1888                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889                         continue;
1890                 }
1891                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1892                         continue;
1893                 }
1894                 if (tinp->sctp_socket->so_qlimit) {
1895                         continue;
1896                 }
1897                 SCTP_INP_WLOCK(tinp);
1898                 LIST_REMOVE(tinp, sctp_hash);
1899                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1900                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1901                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1902                 SCTP_INP_WUNLOCK(tinp);
1903         }
1904         SCTP_INP_WLOCK(inp);
1905         /* Pull from where he was */
1906         LIST_REMOVE(inp, sctp_hash);
1907         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1908         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1909         LIST_INSERT_HEAD(head, inp, sctp_hash);
1910         SCTP_INP_WUNLOCK(inp);
1911         SCTP_INP_RLOCK(inp);
1912         SCTP_INP_INFO_WUNLOCK();
1913         return (0);
1914 }
1915
1916
1917 struct sctp_inpcb *
1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1919     uint32_t vrf_id)
1920 {
1921         /*
1922          * First we check the hash table to see if someone has this port
1923          * bound with just the port.
1924          */
1925         struct sctp_inpcb *inp;
1926         struct sctppcbhead *head;
1927         int lport;
1928         unsigned int i;
1929
1930 #ifdef INET
1931         struct sockaddr_in *sin;
1932
1933 #endif
1934 #ifdef INET6
1935         struct sockaddr_in6 *sin6;
1936
1937 #endif
1938
1939         switch (nam->sa_family) {
1940 #ifdef INET
1941         case AF_INET:
1942                 sin = (struct sockaddr_in *)nam;
1943                 lport = sin->sin_port;
1944                 break;
1945 #endif
1946 #ifdef INET6
1947         case AF_INET6:
1948                 sin6 = (struct sockaddr_in6 *)nam;
1949                 lport = sin6->sin6_port;
1950                 break;
1951 #endif
1952         default:
1953                 return (NULL);
1954         }
1955         /*
1956          * I could cheat here and just cast to one of the types but we will
1957          * do it right. It also provides the check against an Unsupported
1958          * type too.
1959          */
1960         /* Find the head of the ALLADDR chain */
1961         if (have_lock == 0) {
1962                 SCTP_INP_INFO_RLOCK();
1963         }
1964         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1965             SCTP_BASE_INFO(hashmark))];
1966         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1967
1968         /*
1969          * If the TCP model exists it could be that the main listening
1970          * endpoint is gone but there still exists a connected socket for
1971          * this guy. If so we can return the first one that we find. This
1972          * may NOT be the correct one so the caller should be wary on the
1973          * returned INP. Currently the only caller that sets find_tcp_pool
1974          * is in bindx where we are verifying that a user CAN bind the
1975          * address. He either has bound it already, or someone else has, or
1976          * its open to bind, so this is good enough.
1977          */
1978         if (inp == NULL && find_tcp_pool) {
1979                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1980                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1981                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1982                         if (inp) {
1983                                 break;
1984                         }
1985                 }
1986         }
1987         if (inp) {
1988                 SCTP_INP_INCR_REF(inp);
1989         }
1990         if (have_lock == 0) {
1991                 SCTP_INP_INFO_RUNLOCK();
1992         }
1993         return (inp);
1994 }
1995
1996
1997 /*
1998  * Find an association for an endpoint with the pointer to whom you want to
1999  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2000  * need to change the *to to some other struct like a mbuf...
2001  */
2002 struct sctp_tcb *
2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2004     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2005     uint32_t vrf_id)
2006 {
2007         struct sctp_inpcb *inp = NULL;
2008         struct sctp_tcb *stcb;
2009
2010         SCTP_INP_INFO_RLOCK();
2011         if (find_tcp_pool) {
2012                 if (inp_p != NULL) {
2013                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2014                             vrf_id);
2015                 } else {
2016                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2017                             vrf_id);
2018                 }
2019                 if (stcb != NULL) {
2020                         SCTP_INP_INFO_RUNLOCK();
2021                         return (stcb);
2022                 }
2023         }
2024         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2025         if (inp_p != NULL) {
2026                 *inp_p = inp;
2027         }
2028         SCTP_INP_INFO_RUNLOCK();
2029         if (inp == NULL) {
2030                 return (NULL);
2031         }
2032         /*
2033          * ok, we have an endpoint, now lets find the assoc for it (if any)
2034          * we now place the source address or from in the to of the find
2035          * endpoint call. Since in reality this chain is used from the
2036          * inbound packet side.
2037          */
2038         if (inp_p != NULL) {
2039                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2040                     NULL);
2041         } else {
2042                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2043                     NULL);
2044         }
2045         return (stcb);
2046 }
2047
2048
2049 /*
2050  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2051  * find all addresses that the sender has specified in any address list. Each
2052  * address will be used to lookup the TCB and see if one exits.
2053  */
2054 static struct sctp_tcb *
2055 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2056     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2057     struct sockaddr *dst)
2058 {
2059         struct sctp_paramhdr *phdr, parm_buf;
2060
2061 #if defined(INET) || defined(INET6)
2062         struct sctp_tcb *stcb;
2063         uint16_t ptype;
2064
2065 #endif
2066         uint16_t plen;
2067
2068 #ifdef INET
2069         struct sockaddr_in sin4;
2070
2071 #endif
2072 #ifdef INET6
2073         struct sockaddr_in6 sin6;
2074
2075 #endif
2076
2077 #ifdef INET
2078         memset(&sin4, 0, sizeof(sin4));
2079         sin4.sin_len = sizeof(sin4);
2080         sin4.sin_family = AF_INET;
2081         sin4.sin_port = sh->src_port;
2082 #endif
2083 #ifdef INET6
2084         memset(&sin6, 0, sizeof(sin6));
2085         sin6.sin6_len = sizeof(sin6);
2086         sin6.sin6_family = AF_INET6;
2087         sin6.sin6_port = sh->src_port;
2088 #endif
2089
2090         offset += sizeof(struct sctp_init_chunk);
2091
2092         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2093         while (phdr != NULL) {
2094                 /* now we must see if we want the parameter */
2095 #if defined(INET) || defined(INET6)
2096                 ptype = ntohs(phdr->param_type);
2097 #endif
2098                 plen = ntohs(phdr->param_length);
2099                 if (plen == 0) {
2100                         break;
2101                 }
2102 #ifdef INET
2103                 if (ptype == SCTP_IPV4_ADDRESS &&
2104                     plen == sizeof(struct sctp_ipv4addr_param)) {
2105                         /* Get the rest of the address */
2106                         struct sctp_ipv4addr_param ip4_parm, *p4;
2107
2108                         phdr = sctp_get_next_param(m, offset,
2109                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2110                         if (phdr == NULL) {
2111                                 return (NULL);
2112                         }
2113                         p4 = (struct sctp_ipv4addr_param *)phdr;
2114                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2115                         /* look it up */
2116                         stcb = sctp_findassociation_ep_addr(inp_p,
2117                             (struct sockaddr *)&sin4, netp, dst, NULL);
2118                         if (stcb != NULL) {
2119                                 return (stcb);
2120                         }
2121                 }
2122 #endif
2123 #ifdef INET6
2124                 if (ptype == SCTP_IPV6_ADDRESS &&
2125                     plen == sizeof(struct sctp_ipv6addr_param)) {
2126                         /* Get the rest of the address */
2127                         struct sctp_ipv6addr_param ip6_parm, *p6;
2128
2129                         phdr = sctp_get_next_param(m, offset,
2130                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2131                         if (phdr == NULL) {
2132                                 return (NULL);
2133                         }
2134                         p6 = (struct sctp_ipv6addr_param *)phdr;
2135                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2136                         /* look it up */
2137                         stcb = sctp_findassociation_ep_addr(inp_p,
2138                             (struct sockaddr *)&sin6, netp, dst, NULL);
2139                         if (stcb != NULL) {
2140                                 return (stcb);
2141                         }
2142                 }
2143 #endif
2144                 offset += SCTP_SIZE32(plen);
2145                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2146                     sizeof(parm_buf));
2147         }
2148         return (NULL);
2149 }
2150
2151 static struct sctp_tcb *
2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2153     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2154     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2155 {
2156         /*
2157          * Use my vtag to hash. If we find it we then verify the source addr
2158          * is in the assoc. If all goes well we save a bit on rec of a
2159          * packet.
2160          */
2161         struct sctpasochead *head;
2162         struct sctp_nets *net;
2163         struct sctp_tcb *stcb;
2164
2165         SCTP_INP_INFO_RLOCK();
2166         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2167             SCTP_BASE_INFO(hashasocmark))];
2168         LIST_FOREACH(stcb, head, sctp_asocs) {
2169                 SCTP_INP_RLOCK(stcb->sctp_ep);
2170                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2171                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2172                         continue;
2173                 }
2174                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2175                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2176                         continue;
2177                 }
2178                 SCTP_TCB_LOCK(stcb);
2179                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2180                 if (stcb->asoc.my_vtag == vtag) {
2181                         /* candidate */
2182                         if (stcb->rport != rport) {
2183                                 SCTP_TCB_UNLOCK(stcb);
2184                                 continue;
2185                         }
2186                         if (stcb->sctp_ep->sctp_lport != lport) {
2187                                 SCTP_TCB_UNLOCK(stcb);
2188                                 continue;
2189                         }
2190                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2191                                 SCTP_TCB_UNLOCK(stcb);
2192                                 continue;
2193                         }
2194                         /* RRS:Need toaddr check here */
2195                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2196                                 /* Endpoint does not own this address */
2197                                 SCTP_TCB_UNLOCK(stcb);
2198                                 continue;
2199                         }
2200                         if (remote_tag) {
2201                                 /*
2202                                  * If we have both vtags that's all we match
2203                                  * on
2204                                  */
2205                                 if (stcb->asoc.peer_vtag == remote_tag) {
2206                                         /*
2207                                          * If both tags match we consider it
2208                                          * conclusive and check NO
2209                                          * source/destination addresses
2210                                          */
2211                                         goto conclusive;
2212                                 }
2213                         }
2214                         if (skip_src_check) {
2215                 conclusive:
2216                                 if (from) {
2217                                         *netp = sctp_findnet(stcb, from);
2218                                 } else {
2219                                         *netp = NULL;   /* unknown */
2220                                 }
2221                                 if (inp_p)
2222                                         *inp_p = stcb->sctp_ep;
2223                                 SCTP_INP_INFO_RUNLOCK();
2224                                 return (stcb);
2225                         }
2226                         net = sctp_findnet(stcb, from);
2227                         if (net) {
2228                                 /* yep its him. */
2229                                 *netp = net;
2230                                 SCTP_STAT_INCR(sctps_vtagexpress);
2231                                 *inp_p = stcb->sctp_ep;
2232                                 SCTP_INP_INFO_RUNLOCK();
2233                                 return (stcb);
2234                         } else {
2235                                 /*
2236                                  * not him, this should only happen in rare
2237                                  * cases so I peg it.
2238                                  */
2239                                 SCTP_STAT_INCR(sctps_vtagbogus);
2240                         }
2241                 }
2242                 SCTP_TCB_UNLOCK(stcb);
2243         }
2244         SCTP_INP_INFO_RUNLOCK();
2245         return (NULL);
2246 }
2247
2248
2249 /*
2250  * Find an association with the pointer to the inbound IP packet. This can be
2251  * a IPv4 or IPv6 packet.
2252  */
2253 struct sctp_tcb *
2254 sctp_findassociation_addr(struct mbuf *m, int offset,
2255     struct sockaddr *src, struct sockaddr *dst,
2256     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2257     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2258 {
2259         struct sctp_tcb *stcb;
2260         struct sctp_inpcb *inp;
2261
2262         if (sh->v_tag) {
2263                 /* we only go down this path if vtag is non-zero */
2264                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2265                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2266                 if (stcb) {
2267                         return (stcb);
2268                 }
2269         }
2270         if (inp_p) {
2271                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2272                     1, vrf_id);
2273                 inp = *inp_p;
2274         } else {
2275                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2276                     1, vrf_id);
2277         }
2278         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2279         if (stcb == NULL && inp) {
2280                 /* Found a EP but not this address */
2281                 if ((ch->chunk_type == SCTP_INITIATION) ||
2282                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2283                         /*-
2284                          * special hook, we do NOT return linp or an
2285                          * association that is linked to an existing
2286                          * association that is under the TCP pool (i.e. no
2287                          * listener exists). The endpoint finding routine
2288                          * will always find a listener before examining the
2289                          * TCP pool.
2290                          */
2291                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2292                                 if (inp_p) {
2293                                         *inp_p = NULL;
2294                                 }
2295                                 return (NULL);
2296                         }
2297                         stcb = sctp_findassociation_special_addr(m,
2298                             offset, sh, &inp, netp, dst);
2299                         if (inp_p != NULL) {
2300                                 *inp_p = inp;
2301                         }
2302                 }
2303         }
2304         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2305         return (stcb);
2306 }
2307
2308 /*
2309  * lookup an association by an ASCONF lookup address.
2310  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2311  */
2312 struct sctp_tcb *
2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2314     struct sockaddr *dst, struct sctphdr *sh,
2315     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2316 {
2317         struct sctp_tcb *stcb;
2318         union sctp_sockstore remote_store;
2319         struct sctp_paramhdr parm_buf, *phdr;
2320         int ptype;
2321         int zero_address = 0;
2322
2323 #ifdef INET
2324         struct sockaddr_in *sin;
2325
2326 #endif
2327 #ifdef INET6
2328         struct sockaddr_in6 *sin6;
2329
2330 #endif
2331
2332         memset(&remote_store, 0, sizeof(remote_store));
2333         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2334             &parm_buf, sizeof(struct sctp_paramhdr));
2335         if (phdr == NULL) {
2336                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2337                     __func__);
2338                 return NULL;
2339         }
2340         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2341         /* get the correlation address */
2342         switch (ptype) {
2343 #ifdef INET6
2344         case SCTP_IPV6_ADDRESS:
2345                 {
2346                         /* ipv6 address param */
2347                         struct sctp_ipv6addr_param *p6, p6_buf;
2348
2349                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2350                                 return NULL;
2351                         }
2352                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2353                             offset + sizeof(struct sctp_asconf_chunk),
2354                             &p6_buf.ph, sizeof(*p6));
2355                         if (p6 == NULL) {
2356                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2357                                     __func__);
2358                                 return (NULL);
2359                         }
2360                         sin6 = &remote_store.sin6;
2361                         sin6->sin6_family = AF_INET6;
2362                         sin6->sin6_len = sizeof(*sin6);
2363                         sin6->sin6_port = sh->src_port;
2364                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2365                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2366                                 zero_address = 1;
2367                         break;
2368                 }
2369 #endif
2370 #ifdef INET
2371         case SCTP_IPV4_ADDRESS:
2372                 {
2373                         /* ipv4 address param */
2374                         struct sctp_ipv4addr_param *p4, p4_buf;
2375
2376                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2377                                 return NULL;
2378                         }
2379                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2380                             offset + sizeof(struct sctp_asconf_chunk),
2381                             &p4_buf.ph, sizeof(*p4));
2382                         if (p4 == NULL) {
2383                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2384                                     __func__);
2385                                 return (NULL);
2386                         }
2387                         sin = &remote_store.sin;
2388                         sin->sin_family = AF_INET;
2389                         sin->sin_len = sizeof(*sin);
2390                         sin->sin_port = sh->src_port;
2391                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2392                         if (sin->sin_addr.s_addr == INADDR_ANY)
2393                                 zero_address = 1;
2394                         break;
2395                 }
2396 #endif
2397         default:
2398                 /* invalid address param type */
2399                 return NULL;
2400         }
2401
2402         if (zero_address) {
2403                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2404                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2405                 if (stcb != NULL) {
2406                         SCTP_INP_DECR_REF(*inp_p);
2407                 }
2408         } else {
2409                 stcb = sctp_findassociation_ep_addr(inp_p,
2410                     &remote_store.sa, netp,
2411                     dst, NULL);
2412         }
2413         return (stcb);
2414 }
2415
2416
2417 /*
2418  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2419  * addresses. This way if we don't get a bind we by default pick a ephemeral
2420  * port with all addresses bound.
2421  */
2422 int
2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2424 {
2425         /*
2426          * we get called when a new endpoint starts up. We need to allocate
2427          * the sctp_inpcb structure from the zone and init it. Mark it as
2428          * unbound and find a port that we can use as an ephemeral with
2429          * INADDR_ANY. If the user binds later no problem we can then add in
2430          * the specific addresses. And setup the default parameters for the
2431          * EP.
2432          */
2433         int i, error;
2434         struct sctp_inpcb *inp;
2435         struct sctp_pcb *m;
2436         struct timeval time;
2437         sctp_sharedkey_t *null_key;
2438
2439         error = 0;
2440
2441         SCTP_INP_INFO_WLOCK();
2442         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2443         if (inp == NULL) {
2444                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2445                 SCTP_INP_INFO_WUNLOCK();
2446                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2447                 return (ENOBUFS);
2448         }
2449         /* zap it */
2450         bzero(inp, sizeof(*inp));
2451
2452         /* bump generations */
2453         /* setup socket pointers */
2454         inp->sctp_socket = so;
2455         inp->ip_inp.inp.inp_socket = so;
2456         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2457 #ifdef INET6
2458         if (INP_SOCKAF(so) == AF_INET6) {
2459                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2460                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2461                 }
2462                 if (MODULE_GLOBAL(ip6_v6only)) {
2463                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2464                 }
2465         }
2466 #endif
2467         inp->sctp_associd_counter = 1;
2468         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2469         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2470         inp->max_cwnd = 0;
2471         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2472         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2473         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2474         if (SCTP_BASE_SYSCTL(sctp_auth_disable)) {
2475                 inp->auth_supported = 0;
2476         } else {
2477                 inp->auth_supported = 1;
2478         }
2479         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2480         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2481         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2482         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2483         inp->fibnum = so->so_fibnum;
2484         /* init the small hash table we use to track asocid <-> tcb */
2485         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2486         if (inp->sctp_asocidhash == NULL) {
2487                 crfree(inp->ip_inp.inp.inp_cred);
2488                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2489                 SCTP_INP_INFO_WUNLOCK();
2490                 return (ENOBUFS);
2491         }
2492 #ifdef IPSEC
2493         error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2494         if (error != 0) {
2495                 crfree(inp->ip_inp.inp.inp_cred);
2496                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2497                 SCTP_INP_INFO_WUNLOCK();
2498                 return error;
2499         }
2500 #endif                          /* IPSEC */
2501         SCTP_INCR_EP_COUNT();
2502         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2503         SCTP_INP_INFO_WUNLOCK();
2504
2505         so->so_pcb = (caddr_t)inp;
2506
2507         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2508                 /* UDP style socket */
2509                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2510                     SCTP_PCB_FLAGS_UNBOUND);
2511                 /* Be sure it is NON-BLOCKING IO for UDP */
2512                 /* SCTP_SET_SO_NBIO(so); */
2513         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2514                 /* TCP style socket */
2515                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2516                     SCTP_PCB_FLAGS_UNBOUND);
2517                 /* Be sure we have blocking IO by default */
2518                 SCTP_CLEAR_SO_NBIO(so);
2519         } else {
2520                 /*
2521                  * unsupported socket type (RAW, etc)- in case we missed it
2522                  * in protosw
2523                  */
2524                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2525                 so->so_pcb = NULL;
2526                 crfree(inp->ip_inp.inp.inp_cred);
2527 #ifdef IPSEC
2528                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2529 #endif
2530                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2531                 return (EOPNOTSUPP);
2532         }
2533         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2534                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2535                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2536         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2537                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2538                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2539         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2540                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2541                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2542         }
2543         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2544             &inp->sctp_hashmark);
2545         if (inp->sctp_tcbhash == NULL) {
2546                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2547                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2548                 so->so_pcb = NULL;
2549                 crfree(inp->ip_inp.inp.inp_cred);
2550 #ifdef IPSEC
2551                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2552 #endif
2553                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2554                 return (ENOBUFS);
2555         }
2556         inp->def_vrf_id = vrf_id;
2557
2558         SCTP_INP_INFO_WLOCK();
2559         SCTP_INP_LOCK_INIT(inp);
2560         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2561         SCTP_INP_READ_INIT(inp);
2562         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2563         /* lock the new ep */
2564         SCTP_INP_WLOCK(inp);
2565
2566         /* add it to the info area */
2567         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2568         SCTP_INP_INFO_WUNLOCK();
2569
2570         TAILQ_INIT(&inp->read_queue);
2571         LIST_INIT(&inp->sctp_addr_list);
2572
2573         LIST_INIT(&inp->sctp_asoc_list);
2574
2575 #ifdef SCTP_TRACK_FREED_ASOCS
2576         /* TEMP CODE */
2577         LIST_INIT(&inp->sctp_asoc_free_list);
2578 #endif
2579         /* Init the timer structure for signature change */
2580         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2581         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2582
2583         /* now init the actual endpoint default data */
2584         m = &inp->sctp_ep;
2585
2586         /* setup the base timeout information */
2587         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2588         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2589         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2590         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2591         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2592         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2593         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2594         /* all max/min max are in ms */
2595         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2596         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2597         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2598         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2599         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2600         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2601         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2602         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2603         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2604         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2605         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2606         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2607         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2608
2609         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2610         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2611         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2612         /* number of streams to pre-open on a association */
2613         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2614
2615         /* Add adaptation cookie */
2616         m->adaptation_layer_indicator = 0;
2617         m->adaptation_layer_indicator_provided = 0;
2618
2619         /* seed random number generator */
2620         m->random_counter = 1;
2621         m->store_at = SCTP_SIGNATURE_SIZE;
2622         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2623         sctp_fill_random_store(m);
2624
2625         /* Minimum cookie size */
2626         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2627             sizeof(struct sctp_state_cookie);
2628         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2629
2630         /* Setup the initial secret */
2631         (void)SCTP_GETTIME_TIMEVAL(&time);
2632         m->time_of_secret_change = time.tv_sec;
2633
2634         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2635                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2636         }
2637         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2638
2639         /* How long is a cookie good for ? */
2640         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2641         /*
2642          * Initialize authentication parameters
2643          */
2644         m->local_hmacs = sctp_default_supported_hmaclist();
2645         m->local_auth_chunks = sctp_alloc_chunklist();
2646         if (inp->asconf_supported) {
2647                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2648                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2649         }
2650         m->default_dscp = 0;
2651 #ifdef INET6
2652         m->default_flowlabel = 0;
2653 #endif
2654         m->port = 0;            /* encapsulation disabled by default */
2655         LIST_INIT(&m->shared_keys);
2656         /* add default NULL key as key id 0 */
2657         null_key = sctp_alloc_sharedkey();
2658         sctp_insert_sharedkey(&m->shared_keys, null_key);
2659         SCTP_INP_WUNLOCK(inp);
2660 #ifdef SCTP_LOG_CLOSING
2661         sctp_log_closing(inp, NULL, 12);
2662 #endif
2663         return (error);
2664 }
2665
2666
2667 void
2668 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2669     struct sctp_tcb *stcb)
2670 {
2671         struct sctp_nets *net;
2672         uint16_t lport, rport;
2673         struct sctppcbhead *head;
2674         struct sctp_laddr *laddr, *oladdr;
2675
2676         atomic_add_int(&stcb->asoc.refcnt, 1);
2677         SCTP_TCB_UNLOCK(stcb);
2678         SCTP_INP_INFO_WLOCK();
2679         SCTP_INP_WLOCK(old_inp);
2680         SCTP_INP_WLOCK(new_inp);
2681         SCTP_TCB_LOCK(stcb);
2682         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2683
2684         new_inp->sctp_ep.time_of_secret_change =
2685             old_inp->sctp_ep.time_of_secret_change;
2686         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2687             sizeof(old_inp->sctp_ep.secret_key));
2688         new_inp->sctp_ep.current_secret_number =
2689             old_inp->sctp_ep.current_secret_number;
2690         new_inp->sctp_ep.last_secret_number =
2691             old_inp->sctp_ep.last_secret_number;
2692         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2693
2694         /* make it so new data pours into the new socket */
2695         stcb->sctp_socket = new_inp->sctp_socket;
2696         stcb->sctp_ep = new_inp;
2697
2698         /* Copy the port across */
2699         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2700         rport = stcb->rport;
2701         /* Pull the tcb from the old association */
2702         LIST_REMOVE(stcb, sctp_tcbhash);
2703         LIST_REMOVE(stcb, sctp_tcblist);
2704         if (stcb->asoc.in_asocid_hash) {
2705                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2706         }
2707         /* Now insert the new_inp into the TCP connected hash */
2708         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2709
2710         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2711         /* Its safe to access */
2712         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2713
2714         /* Now move the tcb into the endpoint list */
2715         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2716         /*
2717          * Question, do we even need to worry about the ep-hash since we
2718          * only have one connection? Probably not :> so lets get rid of it
2719          * and not suck up any kernel memory in that.
2720          */
2721         if (stcb->asoc.in_asocid_hash) {
2722                 struct sctpasochead *lhd;
2723
2724                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2725                     new_inp->hashasocidmark)];
2726                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2727         }
2728         /* Ok. Let's restart timer. */
2729         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2730                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2731                     stcb, net);
2732         }
2733
2734         SCTP_INP_INFO_WUNLOCK();
2735         if (new_inp->sctp_tcbhash != NULL) {
2736                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2737                 new_inp->sctp_tcbhash = NULL;
2738         }
2739         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2740                 /* Subset bound, so copy in the laddr list from the old_inp */
2741                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2742                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2743                         if (laddr == NULL) {
2744                                 /*
2745                                  * Gak, what can we do? This assoc is really
2746                                  * HOSED. We probably should send an abort
2747                                  * here.
2748                                  */
2749                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2750                                 continue;
2751                         }
2752                         SCTP_INCR_LADDR_COUNT();
2753                         bzero(laddr, sizeof(*laddr));
2754                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2755                         laddr->ifa = oladdr->ifa;
2756                         atomic_add_int(&laddr->ifa->refcount, 1);
2757                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2758                             sctp_nxt_addr);
2759                         new_inp->laddr_count++;
2760                         if (oladdr == stcb->asoc.last_used_address) {
2761                                 stcb->asoc.last_used_address = laddr;
2762                         }
2763                 }
2764         }
2765         /*
2766          * Now any running timers need to be adjusted since we really don't
2767          * care if they are running or not just blast in the new_inp into
2768          * all of them.
2769          */
2770
2771         stcb->asoc.dack_timer.ep = (void *)new_inp;
2772         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2773         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2774         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2775         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2776         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2777         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2778         /* now what about the nets? */
2779         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2780                 net->pmtu_timer.ep = (void *)new_inp;
2781                 net->hb_timer.ep = (void *)new_inp;
2782                 net->rxt_timer.ep = (void *)new_inp;
2783         }
2784         SCTP_INP_WUNLOCK(new_inp);
2785         SCTP_INP_WUNLOCK(old_inp);
2786 }
2787
2788 /*
2789  * insert an laddr entry with the given ifa for the desired list
2790  */
2791 static int
2792 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2793 {
2794         struct sctp_laddr *laddr;
2795
2796         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2797         if (laddr == NULL) {
2798                 /* out of memory? */
2799                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2800                 return (EINVAL);
2801         }
2802         SCTP_INCR_LADDR_COUNT();
2803         bzero(laddr, sizeof(*laddr));
2804         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2805         laddr->ifa = ifa;
2806         laddr->action = act;
2807         atomic_add_int(&ifa->refcount, 1);
2808         /* insert it */
2809         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2810
2811         return (0);
2812 }
2813
2814 /*
2815  * Remove an laddr entry from the local address list (on an assoc)
2816  */
2817 static void
2818 sctp_remove_laddr(struct sctp_laddr *laddr)
2819 {
2820
2821         /* remove from the list */
2822         LIST_REMOVE(laddr, sctp_nxt_addr);
2823         sctp_free_ifa(laddr->ifa);
2824         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2825         SCTP_DECR_LADDR_COUNT();
2826 }
2827
2828
2829
2830 /* sctp_ifap is used to bypass normal local address validation checks */
2831 int
2832 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2833     struct sctp_ifa *sctp_ifap, struct thread *p)
2834 {
2835         /* bind a ep to a socket address */
2836         struct sctppcbhead *head;
2837         struct sctp_inpcb *inp, *inp_tmp;
2838         struct inpcb *ip_inp;
2839         int port_reuse_active = 0;
2840         int bindall;
2841         uint16_t lport;
2842         int error;
2843         uint32_t vrf_id;
2844
2845         lport = 0;
2846         bindall = 1;
2847         inp = (struct sctp_inpcb *)so->so_pcb;
2848         ip_inp = (struct inpcb *)so->so_pcb;
2849 #ifdef SCTP_DEBUG
2850         if (addr) {
2851                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2852                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2853                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2854                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2855         }
2856 #endif
2857         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2858                 /* already did a bind, subsequent binds NOT allowed ! */
2859                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2860                 return (EINVAL);
2861         }
2862 #ifdef INVARIANTS
2863         if (p == NULL)
2864                 panic("null proc/thread");
2865 #endif
2866         if (addr != NULL) {
2867                 switch (addr->sa_family) {
2868 #ifdef INET
2869                 case AF_INET:
2870                         {
2871                                 struct sockaddr_in *sin;
2872
2873                                 /* IPV6_V6ONLY socket? */
2874                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2875                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2876                                         return (EINVAL);
2877                                 }
2878                                 if (addr->sa_len != sizeof(*sin)) {
2879                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2880                                         return (EINVAL);
2881                                 }
2882                                 sin = (struct sockaddr_in *)addr;
2883                                 lport = sin->sin_port;
2884                                 /*
2885                                  * For LOOPBACK the prison_local_ip4() call
2886                                  * will transmute the ip address to the
2887                                  * proper value.
2888                                  */
2889                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2890                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2891                                         return (error);
2892                                 }
2893                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2894                                         bindall = 0;
2895                                 }
2896                                 break;
2897                         }
2898 #endif
2899 #ifdef INET6
2900                 case AF_INET6:
2901                         {
2902                                 /*
2903                                  * Only for pure IPv6 Address. (No IPv4
2904                                  * Mapped!)
2905                                  */
2906                                 struct sockaddr_in6 *sin6;
2907
2908                                 sin6 = (struct sockaddr_in6 *)addr;
2909
2910                                 if (addr->sa_len != sizeof(*sin6)) {
2911                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2912                                         return (EINVAL);
2913                                 }
2914                                 lport = sin6->sin6_port;
2915                                 /*
2916                                  * For LOOPBACK the prison_local_ip6() call
2917                                  * will transmute the ipv6 address to the
2918                                  * proper value.
2919                                  */
2920                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2921                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2922                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2923                                         return (error);
2924                                 }
2925                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2926                                         bindall = 0;
2927                                         /* KAME hack: embed scopeid */
2928                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2929                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2930                                                 return (EINVAL);
2931                                         }
2932                                 }
2933                                 /* this must be cleared for ifa_ifwithaddr() */
2934                                 sin6->sin6_scope_id = 0;
2935                                 break;
2936                         }
2937 #endif
2938                 default:
2939                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2940                         return (EAFNOSUPPORT);
2941                 }
2942         }
2943         SCTP_INP_INFO_WLOCK();
2944         SCTP_INP_WLOCK(inp);
2945         /* Setup a vrf_id to be the default for the non-bind-all case. */
2946         vrf_id = inp->def_vrf_id;
2947
2948         /* increase our count due to the unlock we do */
2949         SCTP_INP_INCR_REF(inp);
2950         if (lport) {
2951                 /*
2952                  * Did the caller specify a port? if so we must see if an ep
2953                  * already has this one bound.
2954                  */
2955                 /* got to be root to get at low ports */
2956                 if (ntohs(lport) < IPPORT_RESERVED) {
2957                         if (p && (error =
2958                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2959                             )) {
2960                                 SCTP_INP_DECR_REF(inp);
2961                                 SCTP_INP_WUNLOCK(inp);
2962                                 SCTP_INP_INFO_WUNLOCK();
2963                                 return (error);
2964                         }
2965                 }
2966                 SCTP_INP_WUNLOCK(inp);
2967                 if (bindall) {
2968                         vrf_id = inp->def_vrf_id;
2969                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2970                         if (inp_tmp != NULL) {
2971                                 /*
2972                                  * lock guy returned and lower count note
2973                                  * that we are not bound so inp_tmp should
2974                                  * NEVER be inp. And it is this inp
2975                                  * (inp_tmp) that gets the reference bump,
2976                                  * so we must lower it.
2977                                  */
2978                                 SCTP_INP_DECR_REF(inp_tmp);
2979                                 /* unlock info */
2980                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2981                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2982                                         /*
2983                                          * Ok, must be one-2-one and
2984                                          * allowing port re-use
2985                                          */
2986                                         port_reuse_active = 1;
2987                                         goto continue_anyway;
2988                                 }
2989                                 SCTP_INP_DECR_REF(inp);
2990                                 SCTP_INP_INFO_WUNLOCK();
2991                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2992                                 return (EADDRINUSE);
2993                         }
2994                 } else {
2995                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2996                         if (inp_tmp != NULL) {
2997                                 /*
2998                                  * lock guy returned and lower count note
2999                                  * that we are not bound so inp_tmp should
3000                                  * NEVER be inp. And it is this inp
3001                                  * (inp_tmp) that gets the reference bump,
3002                                  * so we must lower it.
3003                                  */
3004                                 SCTP_INP_DECR_REF(inp_tmp);
3005                                 /* unlock info */
3006                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3007                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3008                                         /*
3009                                          * Ok, must be one-2-one and
3010                                          * allowing port re-use
3011                                          */
3012                                         port_reuse_active = 1;
3013                                         goto continue_anyway;
3014                                 }
3015                                 SCTP_INP_DECR_REF(inp);
3016                                 SCTP_INP_INFO_WUNLOCK();
3017                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3018                                 return (EADDRINUSE);
3019                         }
3020                 }
3021 continue_anyway:
3022                 SCTP_INP_WLOCK(inp);
3023                 if (bindall) {
3024                         /* verify that no lport is not used by a singleton */
3025                         if ((port_reuse_active == 0) &&
3026                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3027                                 /* Sorry someone already has this one bound */
3028                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3029                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3030                                         port_reuse_active = 1;
3031                                 } else {
3032                                         SCTP_INP_DECR_REF(inp);
3033                                         SCTP_INP_WUNLOCK(inp);
3034                                         SCTP_INP_INFO_WUNLOCK();
3035                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3036                                         return (EADDRINUSE);
3037                                 }
3038                         }
3039                 }
3040         } else {
3041                 uint16_t first, last, candidate;
3042                 uint16_t count;
3043                 int done;
3044
3045                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3046                         first = MODULE_GLOBAL(ipport_hifirstauto);
3047                         last = MODULE_GLOBAL(ipport_hilastauto);
3048                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3049                         if (p && (error =
3050                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3051                             )) {
3052                                 SCTP_INP_DECR_REF(inp);
3053                                 SCTP_INP_WUNLOCK(inp);
3054                                 SCTP_INP_INFO_WUNLOCK();
3055                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3056                                 return (error);
3057                         }
3058                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3059                         last = MODULE_GLOBAL(ipport_lowlastauto);
3060                 } else {
3061                         first = MODULE_GLOBAL(ipport_firstauto);
3062                         last = MODULE_GLOBAL(ipport_lastauto);
3063                 }
3064                 if (first > last) {
3065                         uint16_t temp;
3066
3067                         temp = first;
3068                         first = last;
3069                         last = temp;
3070                 }
3071                 count = last - first + 1;       /* number of candidates */
3072                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3073
3074                 done = 0;
3075                 while (!done) {
3076                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3077                                 done = 1;
3078                         }
3079                         if (!done) {
3080                                 if (--count == 0) {
3081                                         SCTP_INP_DECR_REF(inp);
3082                                         SCTP_INP_WUNLOCK(inp);
3083                                         SCTP_INP_INFO_WUNLOCK();
3084                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3085                                         return (EADDRINUSE);
3086                                 }
3087                                 if (candidate == last)
3088                                         candidate = first;
3089                                 else
3090                                         candidate = candidate + 1;
3091                         }
3092                 }
3093                 lport = htons(candidate);
3094         }
3095         SCTP_INP_DECR_REF(inp);
3096         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3097             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3098                 /*
3099                  * this really should not happen. The guy did a non-blocking
3100                  * bind and then did a close at the same time.
3101                  */
3102                 SCTP_INP_WUNLOCK(inp);
3103                 SCTP_INP_INFO_WUNLOCK();
3104                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3105                 return (EINVAL);
3106         }
3107         /* ok we look clear to give out this port, so lets setup the binding */
3108         if (bindall) {
3109                 /* binding to all addresses, so just set in the proper flags */
3110                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3111                 /* set the automatic addr changes from kernel flag */
3112                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3113                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3114                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3115                 } else {
3116                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3117                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3118                 }
3119                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3120                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3121                 } else {
3122                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3123                 }
3124                 /*
3125                  * set the automatic mobility_base from kernel flag (by
3126                  * micchie)
3127                  */
3128                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3129                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3130                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3131                 } else {
3132                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3133                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3134                 }
3135                 /*
3136                  * set the automatic mobility_fasthandoff from kernel flag
3137                  * (by micchie)
3138                  */
3139                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3140                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3141                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3142                 } else {
3143                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3144                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3145                 }
3146         } else {
3147                 /*
3148                  * bind specific, make sure flags is off and add a new
3149                  * address structure to the sctp_addr_list inside the ep
3150                  * structure.
3151                  *
3152                  * We will need to allocate one and insert it at the head. The
3153                  * socketopt call can just insert new addresses in there as
3154                  * well. It will also have to do the embed scope kame hack
3155                  * too (before adding).
3156                  */
3157                 struct sctp_ifa *ifa;
3158                 union sctp_sockstore store;
3159
3160                 memset(&store, 0, sizeof(store));
3161                 switch (addr->sa_family) {
3162 #ifdef INET
3163                 case AF_INET:
3164                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3165                         store.sin.sin_port = 0;
3166                         break;
3167 #endif
3168 #ifdef INET6
3169                 case AF_INET6:
3170                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3171                         store.sin6.sin6_port = 0;
3172                         break;
3173 #endif
3174                 default:
3175                         break;
3176                 }
3177                 /*
3178                  * first find the interface with the bound address need to
3179                  * zero out the port to find the address! yuck! can't do
3180                  * this earlier since need port for sctp_pcb_findep()
3181                  */
3182                 if (sctp_ifap != NULL) {
3183                         ifa = sctp_ifap;
3184                 } else {
3185                         /*
3186                          * Note for BSD we hit here always other O/S's will
3187                          * pass things in via the sctp_ifap argument
3188                          * (Panda).
3189                          */
3190                         ifa = sctp_find_ifa_by_addr(&store.sa,
3191                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3192                 }
3193                 if (ifa == NULL) {
3194                         /* Can't find an interface with that address */
3195                         SCTP_INP_WUNLOCK(inp);
3196                         SCTP_INP_INFO_WUNLOCK();
3197                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3198                         return (EADDRNOTAVAIL);
3199                 }
3200 #ifdef INET6
3201                 if (addr->sa_family == AF_INET6) {
3202                         /* GAK, more FIXME IFA lock? */
3203                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3204                                 /* Can't bind a non-existent addr. */
3205                                 SCTP_INP_WUNLOCK(inp);
3206                                 SCTP_INP_INFO_WUNLOCK();
3207                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3208                                 return (EINVAL);
3209                         }
3210                 }
3211 #endif
3212                 /* we're not bound all */
3213                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3214                 /* allow bindx() to send ASCONF's for binding changes */
3215                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3216                 /* clear automatic addr changes from kernel flag */
3217                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3218
3219                 /* add this address to the endpoint list */
3220                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3221                 if (error != 0) {
3222                         SCTP_INP_WUNLOCK(inp);
3223                         SCTP_INP_INFO_WUNLOCK();
3224                         return (error);
3225                 }
3226                 inp->laddr_count++;
3227         }
3228         /* find the bucket */
3229         if (port_reuse_active) {
3230                 /* Put it into tcp 1-2-1 hash */
3231                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3232                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3233         } else {
3234                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3235         }
3236         /* put it in the bucket */
3237         LIST_INSERT_HEAD(head, inp, sctp_hash);
3238         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3239             (void *)head, ntohs(lport), port_reuse_active);
3240         /* set in the port */
3241         inp->sctp_lport = lport;
3242
3243         /* turn off just the unbound flag */
3244         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3245         SCTP_INP_WUNLOCK(inp);
3246         SCTP_INP_INFO_WUNLOCK();
3247         return (0);
3248 }
3249
3250
3251 static void
3252 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3253 {
3254         struct sctp_iterator *it, *nit;
3255
3256         /*
3257          * We enter with the only the ITERATOR_LOCK in place and a write
3258          * lock on the inp_info stuff.
3259          */
3260         it = sctp_it_ctl.cur_it;
3261         if (it && (it->vn != curvnet)) {
3262                 /* Its not looking at our VNET */
3263                 return;
3264         }
3265         if (it && (it->inp == inp)) {
3266                 /*
3267                  * This is tricky and we hold the iterator lock, but when it
3268                  * returns and gets the lock (when we release it) the
3269                  * iterator will try to operate on inp. We need to stop that
3270                  * from happening. But of course the iterator has a
3271                  * reference on the stcb and inp. We can mark it and it will
3272                  * stop.
3273                  *
3274                  * If its a single iterator situation, we set the end iterator
3275                  * flag. Otherwise we set the iterator to go to the next
3276                  * inp.
3277                  *
3278                  */
3279                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3280                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3281                 } else {
3282                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3283                 }
3284         }
3285         /*
3286          * Now go through and remove any single reference to our inp that
3287          * may be still pending on the list
3288          */
3289         SCTP_IPI_ITERATOR_WQ_LOCK();
3290         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3291                 if (it->vn != curvnet) {
3292                         continue;
3293                 }
3294                 if (it->inp == inp) {
3295                         /* This one points to me is it inp specific? */
3296                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3297                                 /* Remove and free this one */
3298                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3299                                     it, sctp_nxt_itr);
3300                                 if (it->function_atend != NULL) {
3301                                         (*it->function_atend) (it->pointer, it->val);
3302                                 }
3303                                 SCTP_FREE(it, SCTP_M_ITER);
3304                         } else {
3305                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3306                                 if (it->inp) {
3307                                         SCTP_INP_INCR_REF(it->inp);
3308                                 }
3309                         }
3310                         /*
3311                          * When its put in the refcnt is incremented so decr
3312                          * it
3313                          */
3314                         SCTP_INP_DECR_REF(inp);
3315                 }
3316         }
3317         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3318 }
3319
3320 /* release sctp_inpcb unbind the port */
3321 void
3322 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3323 {
3324         /*
3325          * Here we free a endpoint. We must find it (if it is in the Hash
3326          * table) and remove it from there. Then we must also find it in the
3327          * overall list and remove it from there. After all removals are
3328          * complete then any timer has to be stopped. Then start the actual
3329          * freeing. a) Any local lists. b) Any associations. c) The hash of
3330          * all associations. d) finally the ep itself.
3331          */
3332         struct sctp_tcb *asoc, *nasoc;
3333         struct sctp_laddr *laddr, *nladdr;
3334         struct inpcb *ip_pcb;
3335         struct socket *so;
3336         int being_refed = 0;
3337         struct sctp_queued_to_read *sq, *nsq;
3338         int cnt;
3339         sctp_sharedkey_t *shared_key, *nshared_key;
3340
3341
3342 #ifdef SCTP_LOG_CLOSING
3343         sctp_log_closing(inp, NULL, 0);
3344 #endif
3345         SCTP_ITERATOR_LOCK();
3346         /* mark any iterators on the list or being processed */
3347         sctp_iterator_inp_being_freed(inp);
3348         SCTP_ITERATOR_UNLOCK();
3349         so = inp->sctp_socket;
3350         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3351                 /* been here before.. eeks.. get out of here */
3352                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3353 #ifdef SCTP_LOG_CLOSING
3354                 sctp_log_closing(inp, NULL, 1);
3355 #endif
3356                 return;
3357         }
3358         SCTP_ASOC_CREATE_LOCK(inp);
3359         SCTP_INP_INFO_WLOCK();
3360
3361         SCTP_INP_WLOCK(inp);
3362         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3363                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3364                 /* socket is gone, so no more wakeups allowed */
3365                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3366                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3367                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3368
3369         }
3370         /* First time through we have the socket lock, after that no more. */
3371         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3372             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3373
3374         if (inp->control) {
3375                 sctp_m_freem(inp->control);
3376                 inp->control = NULL;
3377         }
3378         if (inp->pkt) {
3379                 sctp_m_freem(inp->pkt);
3380                 inp->pkt = NULL;
3381         }
3382         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3383                                          * here but I will be nice :> (i.e.
3384                                          * ip_pcb = ep;) */
3385         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3386                 int cnt_in_sd;
3387
3388                 cnt_in_sd = 0;
3389                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3390                         SCTP_TCB_LOCK(asoc);
3391                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3392                                 /* Skip guys being freed */
3393                                 cnt_in_sd++;
3394                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3395                                         /*
3396                                          * Special case - we did not start a
3397                                          * kill timer on the asoc due to it
3398                                          * was not closed. So go ahead and
3399                                          * start it now.
3400                                          */
3401                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3402                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3403                                 }
3404                                 SCTP_TCB_UNLOCK(asoc);
3405                                 continue;
3406                         }
3407                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3408                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3409                             (asoc->asoc.total_output_queue_size == 0)) {
3410                                 /*
3411                                  * If we have data in queue, we don't want
3412                                  * to just free since the app may have done,
3413                                  * send()/close or connect/send/close. And
3414                                  * it wants the data to get across first.
3415                                  */
3416                                 /* Just abandon things in the front states */
3417                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3418                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3419                                         cnt_in_sd++;
3420                                 }
3421                                 continue;
3422                         }
3423                         /* Disconnect the socket please */
3424                         asoc->sctp_socket = NULL;
3425                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3426                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3427                             (asoc->asoc.control_pdapi) ||
3428                             (asoc->asoc.size_on_all_streams > 0) ||
3429                             (so && (so->so_rcv.sb_cc > 0))) {
3430                                 /* Left with Data unread */
3431                                 struct mbuf *op_err;
3432
3433                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3434                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3435                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3436                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3437                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3438                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3439                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3440                                 }
3441                                 if (sctp_free_assoc(inp, asoc,
3442                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3443                                         cnt_in_sd++;
3444                                 }
3445                                 continue;
3446                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3447                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3448                             (asoc->asoc.stream_queue_cnt == 0)) {
3449                                 if (asoc->asoc.locked_on_sending) {
3450                                         goto abort_anyway;
3451                                 }
3452                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3453                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3454                                         struct sctp_nets *netp;
3455
3456                                         /*
3457                                          * there is nothing queued to send,
3458                                          * so I send shutdown
3459                                          */
3460                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3461                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3462                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3463                                         }
3464                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3465                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3466                                         sctp_stop_timers_for_shutdown(asoc);
3467                                         if (asoc->asoc.alternate) {
3468                                                 netp = asoc->asoc.alternate;
3469                                         } else {
3470                                                 netp = asoc->asoc.primary_destination;
3471                                         }
3472                                         sctp_send_shutdown(asoc, netp);
3473                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3474                                             netp);
3475                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3476                                             asoc->asoc.primary_destination);
3477                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3478                                 }
3479                         } else {
3480                                 /* mark into shutdown pending */
3481                                 struct sctp_stream_queue_pending *sp;
3482
3483                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3484                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3485                                     asoc->asoc.primary_destination);
3486                                 if (asoc->asoc.locked_on_sending) {
3487                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3488                                             sctp_streamhead);
3489                                         if (sp == NULL) {
3490                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3491                                                     (void *)asoc->asoc.locked_on_sending,
3492                                                     asoc->asoc.locked_on_sending->stream_no);
3493                                         } else {
3494                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3495                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3496                                         }
3497                                 }
3498                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3499                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3500                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3501                                         struct mbuf *op_err;
3502
3503                         abort_anyway:
3504                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3505                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3506                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3507                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3508                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3509                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3510                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3511                                         }
3512                                         if (sctp_free_assoc(inp, asoc,
3513                                             SCTP_PCBFREE_NOFORCE,
3514                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3515                                                 cnt_in_sd++;
3516                                         }
3517                                         continue;
3518                                 } else {
3519                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3520                                 }
3521                         }
3522                         cnt_in_sd++;
3523                         SCTP_TCB_UNLOCK(asoc);
3524                 }
3525                 /* now is there some left in our SHUTDOWN state? */
3526                 if (cnt_in_sd) {
3527 #ifdef SCTP_LOG_CLOSING
3528                         sctp_log_closing(inp, NULL, 2);
3529 #endif
3530                         inp->sctp_socket = NULL;
3531                         SCTP_INP_WUNLOCK(inp);
3532                         SCTP_ASOC_CREATE_UNLOCK(inp);
3533                         SCTP_INP_INFO_WUNLOCK();
3534                         return;
3535                 }
3536         }
3537         inp->sctp_socket = NULL;
3538         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3539             SCTP_PCB_FLAGS_UNBOUND) {
3540                 /*
3541                  * ok, this guy has been bound. It's port is somewhere in
3542                  * the SCTP_BASE_INFO(hash table). Remove it!
3543                  */
3544                 LIST_REMOVE(inp, sctp_hash);
3545                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3546         }
3547         /*
3548          * If there is a timer running to kill us, forget it, since it may
3549          * have a contest on the INP lock.. which would cause us to die ...
3550          */
3551         cnt = 0;
3552         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3553                 SCTP_TCB_LOCK(asoc);
3554                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3555                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3556                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3557                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3558                         }
3559                         cnt++;
3560                         SCTP_TCB_UNLOCK(asoc);
3561                         continue;
3562                 }
3563                 /* Free associations that are NOT killing us */
3564                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3565                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3566                         struct mbuf *op_err;
3567
3568                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3569                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3570                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3571                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3572                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3573                         cnt++;
3574                         SCTP_TCB_UNLOCK(asoc);
3575                         continue;
3576                 }
3577                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3578                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3579                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3580                 }
3581                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3582                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3583                         cnt++;
3584                 }
3585         }
3586         if (cnt) {
3587                 /* Ok we have someone out there that will kill us */
3588                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3589 #ifdef SCTP_LOG_CLOSING
3590                 sctp_log_closing(inp, NULL, 3);
3591 #endif
3592                 SCTP_INP_WUNLOCK(inp);
3593                 SCTP_ASOC_CREATE_UNLOCK(inp);
3594                 SCTP_INP_INFO_WUNLOCK();
3595                 return;
3596         }
3597         if (SCTP_INP_LOCK_CONTENDED(inp))
3598                 being_refed++;
3599         if (SCTP_INP_READ_CONTENDED(inp))
3600                 being_refed++;
3601         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3602                 being_refed++;
3603
3604         if ((inp->refcount) ||
3605             (being_refed) ||
3606             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3607                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3608 #ifdef SCTP_LOG_CLOSING
3609                 sctp_log_closing(inp, NULL, 4);
3610 #endif
3611                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3612                 SCTP_INP_WUNLOCK(inp);
3613                 SCTP_ASOC_CREATE_UNLOCK(inp);
3614                 SCTP_INP_INFO_WUNLOCK();
3615                 return;
3616         }
3617         inp->sctp_ep.signature_change.type = 0;
3618         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3619         /*
3620          * Remove it from the list .. last thing we need a lock for.
3621          */
3622         LIST_REMOVE(inp, sctp_list);
3623         SCTP_INP_WUNLOCK(inp);
3624         SCTP_ASOC_CREATE_UNLOCK(inp);
3625         SCTP_INP_INFO_WUNLOCK();
3626         /*
3627          * Now we release all locks. Since this INP cannot be found anymore
3628          * except possibly by the kill timer that might be running. We call
3629          * the drain function here. It should hit the case were it sees the
3630          * ACTIVE flag cleared and exit out freeing us to proceed and
3631          * destroy everything.
3632          */
3633         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3634                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3635         } else {
3636                 /* Probably un-needed */
3637                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3638         }
3639
3640 #ifdef SCTP_LOG_CLOSING
3641         sctp_log_closing(inp, NULL, 5);
3642 #endif
3643
3644
3645         if ((inp->sctp_asocidhash) != NULL) {
3646                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3647                 inp->sctp_asocidhash = NULL;
3648         }
3649         /* sa_ignore FREED_MEMORY */
3650         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3651                 /* Its only abandoned if it had data left */
3652                 if (sq->length)
3653                         SCTP_STAT_INCR(sctps_left_abandon);
3654
3655                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3656                 sctp_free_remote_addr(sq->whoFrom);
3657                 if (so)
3658                         so->so_rcv.sb_cc -= sq->length;
3659                 if (sq->data) {
3660                         sctp_m_freem(sq->data);
3661                         sq->data = NULL;
3662                 }
3663                 /*
3664                  * no need to free the net count, since at this point all
3665                  * assoc's are gone.
3666                  */
3667                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3668                 SCTP_DECR_READQ_COUNT();
3669         }
3670         /* Now the sctp_pcb things */
3671         /*
3672          * free each asoc if it is not already closed/free. we can't use the
3673          * macro here since le_next will get freed as part of the
3674          * sctp_free_assoc() call.
3675          */
3676 #ifdef IPSEC
3677         ipsec_delete_pcbpolicy(ip_pcb);
3678 #endif
3679         if (ip_pcb->inp_options) {
3680                 (void)sctp_m_free(ip_pcb->inp_options);
3681                 ip_pcb->inp_options = 0;
3682         }
3683 #ifdef INET6
3684         if (ip_pcb->inp_vflag & INP_IPV6) {
3685                 struct in6pcb *in6p;
3686
3687                 in6p = (struct in6pcb *)inp;
3688                 ip6_freepcbopts(in6p->in6p_outputopts);
3689         }
3690 #endif                          /* INET6 */
3691         ip_pcb->inp_vflag = 0;
3692         /* free up authentication fields */
3693         if (inp->sctp_ep.local_auth_chunks != NULL)
3694                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3695         if (inp->sctp_ep.local_hmacs != NULL)
3696                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3697
3698         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3699                 LIST_REMOVE(shared_key, next);
3700                 sctp_free_sharedkey(shared_key);
3701                 /* sa_ignore FREED_MEMORY */
3702         }
3703
3704         /*
3705          * if we have an address list the following will free the list of
3706          * ifaddr's that are set into this ep. Again macro limitations here,
3707          * since the LIST_FOREACH could be a bad idea.
3708          */
3709         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3710                 sctp_remove_laddr(laddr);
3711         }
3712
3713 #ifdef SCTP_TRACK_FREED_ASOCS
3714         /* TEMP CODE */
3715         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3716                 LIST_REMOVE(asoc, sctp_tcblist);
3717                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3718                 SCTP_DECR_ASOC_COUNT();
3719         }
3720         /* *** END TEMP CODE *** */
3721 #endif
3722         /* Now lets see about freeing the EP hash table. */
3723         if (inp->sctp_tcbhash != NULL) {
3724                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3725                 inp->sctp_tcbhash = NULL;
3726         }
3727         /* Now we must put the ep memory back into the zone pool */
3728         crfree(inp->ip_inp.inp.inp_cred);
3729         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3730         SCTP_INP_LOCK_DESTROY(inp);
3731         SCTP_INP_READ_DESTROY(inp);
3732         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3733         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3734         SCTP_DECR_EP_COUNT();
3735 }
3736
3737
3738 struct sctp_nets *
3739 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3740 {
3741         struct sctp_nets *net;
3742
3743         /* locate the address */
3744         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3745                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3746                         return (net);
3747         }
3748         return (NULL);
3749 }
3750
3751
3752 int
3753 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3754 {
3755         struct sctp_ifa *sctp_ifa;
3756
3757         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3758         if (sctp_ifa) {
3759                 return (1);
3760         } else {
3761                 return (0);
3762         }
3763 }
3764
3765 /*
3766  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3767  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3768  * stats of stuff.
3769  */
3770 int
3771 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3772     struct sctp_nets **netp, int set_scope, int from)
3773 {
3774         /*
3775          * The following is redundant to the same lines in the
3776          * sctp_aloc_assoc() but is needed since others call the add address
3777          * function
3778          */
3779         struct sctp_nets *net, *netfirst;
3780         int addr_inscope;
3781
3782         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3783             from);
3784         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3785
3786         netfirst = sctp_findnet(stcb, newaddr);
3787         if (netfirst) {
3788                 /*
3789                  * Lie and return ok, we don't want to make the association
3790                  * go away for this behavior. It will happen in the TCP
3791                  * model in a connected socket. It does not reach the hash
3792                  * table until after the association is built so it can't be
3793                  * found. Mark as reachable, since the initial creation will
3794                  * have been cleared and the NOT_IN_ASSOC flag will have
3795                  * been added... and we don't want to end up removing it
3796                  * back out.
3797                  */
3798                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3799                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3800                             SCTP_ADDR_UNCONFIRMED);
3801                 } else {
3802                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3803                 }
3804
3805                 return (0);
3806         }
3807         addr_inscope = 1;
3808         switch (newaddr->sa_family) {
3809 #ifdef INET
3810         case AF_INET:
3811                 {
3812                         struct sockaddr_in *sin;
3813
3814                         sin = (struct sockaddr_in *)newaddr;
3815                         if (sin->sin_addr.s_addr == 0) {
3816                                 /* Invalid address */
3817                                 return (-1);
3818                         }
3819                         /* zero out the bzero area */
3820                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3821
3822                         /* assure len is set */
3823                         sin->sin_len = sizeof(struct sockaddr_in);
3824                         if (set_scope) {
3825                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3826                                         stcb->asoc.scope.ipv4_local_scope = 1;
3827                                 }
3828                         } else {
3829                                 /* Validate the address is in scope */
3830                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3831                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3832                                         addr_inscope = 0;
3833                                 }
3834                         }
3835                         break;
3836                 }
3837 #endif
3838 #ifdef INET6
3839         case AF_INET6:
3840                 {
3841                         struct sockaddr_in6 *sin6;
3842
3843                         sin6 = (struct sockaddr_in6 *)newaddr;
3844                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3845                                 /* Invalid address */
3846                                 return (-1);
3847                         }
3848                         /* assure len is set */
3849                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3850                         if (set_scope) {
3851                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3852                                         stcb->asoc.scope.loopback_scope = 1;
3853                                         stcb->asoc.scope.local_scope = 0;
3854                                         stcb->asoc.scope.ipv4_local_scope = 1;
3855                                         stcb->asoc.scope.site_scope = 1;
3856                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3857                                         /*
3858                                          * If the new destination is a
3859                                          * LINK_LOCAL we must have common
3860                                          * site scope. Don't set the local
3861                                          * scope since we may not share all
3862                                          * links, only loopback can do this.
3863                                          * Links on the local network would
3864                                          * also be on our private network
3865                                          * for v4 too.
3866                                          */
3867                                         stcb->asoc.scope.ipv4_local_scope = 1;
3868                                         stcb->asoc.scope.site_scope = 1;
3869                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3870                                         /*
3871                                          * If the new destination is
3872                                          * SITE_LOCAL then we must have site
3873                                          * scope in common.
3874                                          */
3875                                         stcb->asoc.scope.site_scope = 1;
3876                                 }
3877                         } else {
3878                                 /* Validate the address is in scope */
3879                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3880                                     (stcb->asoc.scope.loopback_scope == 0)) {
3881                                         addr_inscope = 0;
3882                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3883                                     (stcb->asoc.scope.local_scope == 0)) {
3884                                         addr_inscope = 0;
3885                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3886                                     (stcb->asoc.scope.site_scope == 0)) {
3887                                         addr_inscope = 0;
3888                                 }
3889                         }
3890                         break;
3891                 }
3892 #endif
3893         default:
3894                 /* not supported family type */
3895                 return (-1);
3896         }
3897         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3898         if (net == NULL) {
3899                 return (-1);
3900         }
3901         SCTP_INCR_RADDR_COUNT();
3902         bzero(net, sizeof(struct sctp_nets));
3903         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3904         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3905         switch (newaddr->sa_family) {
3906 #ifdef INET
3907         case AF_INET:
3908                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3909                 break;
3910 #endif
3911 #ifdef INET6
3912         case AF_INET6:
3913                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3914                 break;
3915 #endif
3916         default:
3917                 break;
3918         }
3919         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3920         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3921                 stcb->asoc.scope.loopback_scope = 1;
3922                 stcb->asoc.scope.ipv4_local_scope = 1;
3923                 stcb->asoc.scope.local_scope = 0;
3924                 stcb->asoc.scope.site_scope = 1;
3925                 addr_inscope = 1;
3926         }
3927         net->failure_threshold = stcb->asoc.def_net_failure;
3928         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3929         if (addr_inscope == 0) {
3930                 net->dest_state = (SCTP_ADDR_REACHABLE |
3931                     SCTP_ADDR_OUT_OF_SCOPE);
3932         } else {
3933                 if (from == SCTP_ADDR_IS_CONFIRMED)
3934                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3935                         net->dest_state = SCTP_ADDR_REACHABLE;
3936                 else
3937                         net->dest_state = SCTP_ADDR_REACHABLE |
3938                             SCTP_ADDR_UNCONFIRMED;
3939         }
3940         /*
3941          * We set this to 0, the timer code knows that this means its an
3942          * initial value
3943          */
3944         net->rto_needed = 1;
3945         net->RTO = 0;
3946         net->RTO_measured = 0;
3947         stcb->asoc.numnets++;
3948         net->ref_count = 1;
3949         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3950         net->port = stcb->asoc.port;
3951         net->dscp = stcb->asoc.default_dscp;
3952 #ifdef INET6
3953         net->flowlabel = stcb->asoc.default_flowlabel;
3954 #endif
3955         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3956                 net->dest_state |= SCTP_ADDR_NOHB;
3957         } else {
3958                 net->dest_state &= ~SCTP_ADDR_NOHB;
3959         }
3960         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3961                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3962         } else {
3963                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3964         }
3965         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3966         /* Init the timer structure */
3967         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3968         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3969         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3970
3971         /* Now generate a route for this guy */
3972 #ifdef INET6
3973         /* KAME hack: embed scopeid */
3974         if (newaddr->sa_family == AF_INET6) {
3975                 struct sockaddr_in6 *sin6;
3976
3977                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3978                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3979                 sin6->sin6_scope_id = 0;
3980         }
3981 #endif
3982         SCTP_RTALLOC((sctp_route_t *) & net->ro,
3983             stcb->asoc.vrf_id,
3984             stcb->sctp_ep->fibnum);
3985
3986         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3987                 /* Get source address */
3988                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3989                     stcb,
3990                     (sctp_route_t *) & net->ro,
3991                     net,
3992                     0,
3993                     stcb->asoc.vrf_id);
3994                 if (net->ro._s_addr != NULL) {
3995                         net->src_addr_selected = 1;
3996                         /* Now get the interface MTU */
3997                         if (net->ro._s_addr->ifn_p != NULL) {
3998                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3999                         }
4000                 } else {
4001                         net->src_addr_selected = 0;
4002                 }
4003                 if (net->mtu > 0) {
4004                         uint32_t rmtu;
4005
4006                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4007                         if (rmtu == 0) {
4008                                 /*
4009                                  * Start things off to match mtu of
4010                                  * interface please.
4011                                  */
4012                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4013                                     net->ro.ro_rt, net->mtu);
4014                         } else {
4015                                 /*
4016                                  * we take the route mtu over the interface,
4017                                  * since the route may be leading out the
4018                                  * loopback, or a different interface.
4019                                  */
4020                                 net->mtu = rmtu;
4021                         }
4022                 }
4023         } else {
4024                 net->src_addr_selected = 0;
4025         }
4026         if (net->mtu == 0) {
4027                 switch (newaddr->sa_family) {
4028 #ifdef INET
4029                 case AF_INET:
4030                         net->mtu = SCTP_DEFAULT_MTU;
4031                         break;
4032 #endif
4033 #ifdef INET6
4034                 case AF_INET6:
4035                         net->mtu = 1280;
4036                         break;
4037 #endif
4038                 default:
4039                         break;
4040                 }
4041         }
4042 #if defined(INET) || defined(INET6)
4043         if (net->port) {
4044                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4045         }
4046 #endif
4047         if (from == SCTP_ALLOC_ASOC) {
4048                 stcb->asoc.smallest_mtu = net->mtu;
4049         }
4050         if (stcb->asoc.smallest_mtu > net->mtu) {
4051                 stcb->asoc.smallest_mtu = net->mtu;
4052         }
4053 #ifdef INET6
4054         if (newaddr->sa_family == AF_INET6) {
4055                 struct sockaddr_in6 *sin6;
4056
4057                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4058                 (void)sa6_recoverscope(sin6);
4059         }
4060 #endif
4061
4062         /* JRS - Use the congestion control given in the CC module */
4063         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4064                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4065
4066         /*
4067          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4068          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4069          */
4070         net->find_pseudo_cumack = 1;
4071         net->find_rtx_pseudo_cumack = 1;
4072         /* Choose an initial flowid. */
4073         net->flowid = stcb->asoc.my_vtag ^
4074             ntohs(stcb->rport) ^
4075             ntohs(stcb->sctp_ep->sctp_lport);
4076         net->flowtype = M_HASHTYPE_OPAQUE;
4077         if (netp) {
4078                 *netp = net;
4079         }
4080         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4081         if (net->ro.ro_rt == NULL) {
4082                 /* Since we have no route put it at the back */
4083                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4084         } else if (netfirst == NULL) {
4085                 /* We are the first one in the pool. */
4086                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4087         } else if (netfirst->ro.ro_rt == NULL) {
4088                 /*
4089                  * First one has NO route. Place this one ahead of the first
4090                  * one.
4091                  */
4092                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4093         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4094                 /*
4095                  * This one has a different interface than the one at the
4096                  * top of the list. Place it ahead.
4097                  */
4098                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4099         } else {
4100                 /*
4101                  * Ok we have the same interface as the first one. Move
4102                  * forward until we find either a) one with a NULL route...
4103                  * insert ahead of that b) one with a different ifp.. insert
4104                  * after that. c) end of the list.. insert at the tail.
4105                  */
4106                 struct sctp_nets *netlook;
4107
4108                 do {
4109                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4110                         if (netlook == NULL) {
4111                                 /* End of the list */
4112                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4113                                 break;
4114                         } else if (netlook->ro.ro_rt == NULL) {
4115                                 /* next one has NO route */
4116                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4117                                 break;
4118                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4119                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4120                                     net, sctp_next);
4121                                 break;
4122                         }
4123                         /* Shift forward */
4124                         netfirst = netlook;
4125                 } while (netlook != NULL);
4126         }
4127
4128         /* got to have a primary set */
4129         if (stcb->asoc.primary_destination == 0) {
4130                 stcb->asoc.primary_destination = net;
4131         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4132                     (net->ro.ro_rt) &&
4133             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4134                 /* No route to current primary adopt new primary */
4135                 stcb->asoc.primary_destination = net;
4136         }
4137         /* Validate primary is first */
4138         net = TAILQ_FIRST(&stcb->asoc.nets);
4139         if ((net != stcb->asoc.primary_destination) &&
4140             (stcb->asoc.primary_destination)) {
4141                 /*
4142                  * first one on the list is NOT the primary sctp_cmpaddr()
4143                  * is much more efficient if the primary is the first on the
4144                  * list, make it so.
4145                  */
4146                 TAILQ_REMOVE(&stcb->asoc.nets,
4147                     stcb->asoc.primary_destination, sctp_next);
4148                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4149                     stcb->asoc.primary_destination, sctp_next);
4150         }
4151         return (0);
4152 }
4153
4154
4155 static uint32_t
4156 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4157 {
4158         uint32_t id;
4159         struct sctpasochead *head;
4160         struct sctp_tcb *lstcb;
4161
4162         SCTP_INP_WLOCK(inp);
4163 try_again:
4164         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4165                 /* TSNH */
4166                 SCTP_INP_WUNLOCK(inp);
4167                 return (0);
4168         }
4169         /*
4170          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4171          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4172          */
4173         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4174                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4175         }
4176         id = inp->sctp_associd_counter;
4177         inp->sctp_associd_counter++;
4178         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4179         if (lstcb) {
4180                 goto try_again;
4181         }
4182         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4183         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4184         stcb->asoc.in_asocid_hash = 1;
4185         SCTP_INP_WUNLOCK(inp);
4186         return id;
4187 }
4188
4189 /*
4190  * allocate an association and add it to the endpoint. The caller must be
4191  * careful to add all additional addresses once they are know right away or
4192  * else the assoc will be may experience a blackout scenario.
4193  */
4194 struct sctp_tcb *
4195 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4196     int *error, uint32_t override_tag, uint32_t vrf_id,
4197     uint16_t o_streams,
4198     struct thread *p
4199 )
4200 {
4201         /* note the p argument is only valid in unbound sockets */
4202
4203         struct sctp_tcb *stcb;
4204         struct sctp_association *asoc;
4205         struct sctpasochead *head;
4206         uint16_t rport;
4207         int err;
4208
4209         /*
4210          * Assumption made here: Caller has done a
4211          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4212          * address does not exist already.
4213          */
4214         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4215                 /* Hit max assoc, sorry no more */
4216                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4217                 *error = ENOBUFS;
4218                 return (NULL);
4219         }
4220         if (firstaddr == NULL) {
4221                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4222                 *error = EINVAL;
4223                 return (NULL);
4224         }
4225         SCTP_INP_RLOCK(inp);
4226         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4227             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4228             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4229                 /*
4230                  * If its in the TCP pool, its NOT allowed to create an
4231                  * association. The parent listener needs to call
4232                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4233                  * off, or connected one does this.. its an error.
4234                  */
4235                 SCTP_INP_RUNLOCK(inp);
4236                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4237                 *error = EINVAL;
4238                 return (NULL);
4239         }
4240         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4241             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4242                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4243                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4244                         SCTP_INP_RUNLOCK(inp);
4245                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4246                         *error = EINVAL;
4247                         return (NULL);
4248                 }
4249         }
4250         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4251 #ifdef SCTP_DEBUG
4252         if (firstaddr) {
4253                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4254                 switch (firstaddr->sa_family) {
4255 #ifdef INET
4256                 case AF_INET:
4257                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4258                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4259                         break;
4260 #endif
4261 #ifdef INET6
4262                 case AF_INET6:
4263                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4264                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4265                         break;
4266 #endif
4267                 default:
4268                         break;
4269                 }
4270         } else {
4271                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4272         }
4273 #endif                          /* SCTP_DEBUG */
4274         switch (firstaddr->sa_family) {
4275 #ifdef INET
4276         case AF_INET:
4277                 {
4278                         struct sockaddr_in *sin;
4279
4280                         sin = (struct sockaddr_in *)firstaddr;
4281                         if ((ntohs(sin->sin_port) == 0) ||
4282                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4283                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4284                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4285                                 /* Invalid address */
4286                                 SCTP_INP_RUNLOCK(inp);
4287                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4288                                 *error = EINVAL;
4289                                 return (NULL);
4290                         }
4291                         rport = sin->sin_port;
4292                         break;
4293                 }
4294 #endif
4295 #ifdef INET6
4296         case AF_INET6:
4297                 {
4298                         struct sockaddr_in6 *sin6;
4299
4300                         sin6 = (struct sockaddr_in6 *)firstaddr;
4301                         if ((ntohs(sin6->sin6_port) == 0) ||
4302                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4303                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4304                                 /* Invalid address */
4305                                 SCTP_INP_RUNLOCK(inp);
4306                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4307                                 *error = EINVAL;
4308                                 return (NULL);
4309                         }
4310                         rport = sin6->sin6_port;
4311                         break;
4312                 }
4313 #endif
4314         default:
4315                 /* not supported family type */
4316                 SCTP_INP_RUNLOCK(inp);
4317                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4318                 *error = EINVAL;
4319                 return (NULL);
4320         }
4321         SCTP_INP_RUNLOCK(inp);
4322         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4323                 /*
4324                  * If you have not performed a bind, then we need to do the
4325                  * ephemeral bind for you.
4326                  */
4327                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4328                     (struct sockaddr *)NULL,
4329                     (struct sctp_ifa *)NULL,
4330                     p
4331                     ))) {
4332                         /* bind error, probably perm */
4333                         *error = err;
4334                         return (NULL);
4335                 }
4336         }
4337         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4338         if (stcb == NULL) {
4339                 /* out of memory? */
4340                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4341                 *error = ENOMEM;
4342                 return (NULL);
4343         }
4344         SCTP_INCR_ASOC_COUNT();
4345
4346         bzero(stcb, sizeof(*stcb));
4347         asoc = &stcb->asoc;
4348
4349         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4350         SCTP_TCB_LOCK_INIT(stcb);
4351         SCTP_TCB_SEND_LOCK_INIT(stcb);
4352         stcb->rport = rport;
4353         /* setup back pointer's */
4354         stcb->sctp_ep = inp;
4355         stcb->sctp_socket = inp->sctp_socket;
4356         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4357                 /* failed */
4358                 SCTP_TCB_LOCK_DESTROY(stcb);
4359                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4360                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4361                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4362                 SCTP_DECR_ASOC_COUNT();
4363                 *error = err;
4364                 return (NULL);
4365         }
4366         /* and the port */
4367         SCTP_INP_INFO_WLOCK();
4368         SCTP_INP_WLOCK(inp);
4369         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4370                 /* inpcb freed while alloc going on */
4371                 SCTP_TCB_LOCK_DESTROY(stcb);
4372                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4373                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4374                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4375                 SCTP_INP_WUNLOCK(inp);
4376                 SCTP_INP_INFO_WUNLOCK();
4377                 SCTP_DECR_ASOC_COUNT();
4378                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4379                 *error = EINVAL;
4380                 return (NULL);
4381         }
4382         SCTP_TCB_LOCK(stcb);
4383
4384         /* now that my_vtag is set, add it to the hash */
4385         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4386         /* put it in the bucket in the vtag hash of assoc's for the system */
4387         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4388         SCTP_INP_INFO_WUNLOCK();
4389
4390         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4391                 /* failure.. memory error? */
4392                 if (asoc->strmout) {
4393                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4394                         asoc->strmout = NULL;
4395                 }
4396                 if (asoc->mapping_array) {
4397                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4398                         asoc->mapping_array = NULL;
4399                 }
4400                 if (asoc->nr_mapping_array) {
4401                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4402                         asoc->nr_mapping_array = NULL;
4403                 }
4404                 SCTP_DECR_ASOC_COUNT();
4405                 SCTP_TCB_UNLOCK(stcb);
4406                 SCTP_TCB_LOCK_DESTROY(stcb);
4407                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4408                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4409                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4410                 SCTP_INP_WUNLOCK(inp);
4411                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4412                 *error = ENOBUFS;
4413                 return (NULL);
4414         }
4415         /* Init all the timers */
4416         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4417         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4418         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4419         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4420         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4421         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4422         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4423
4424         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4425         /* now file the port under the hash as well */
4426         if (inp->sctp_tcbhash != NULL) {
4427                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4428                     inp->sctp_hashmark)];
4429                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4430         }
4431         SCTP_INP_WUNLOCK(inp);
4432         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4433         return (stcb);
4434 }
4435
4436
4437 void
4438 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4439 {
4440         struct sctp_association *asoc;
4441
4442         asoc = &stcb->asoc;
4443         asoc->numnets--;
4444         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4445         if (net == asoc->primary_destination) {
4446                 /* Reset primary */
4447                 struct sctp_nets *lnet;
4448
4449                 lnet = TAILQ_FIRST(&asoc->nets);
4450                 /*
4451                  * Mobility adaptation Ideally, if deleted destination is
4452                  * the primary, it becomes a fast retransmission trigger by
4453                  * the subsequent SET PRIMARY. (by micchie)
4454                  */
4455                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4456                     SCTP_MOBILITY_BASE) ||
4457                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4458                     SCTP_MOBILITY_FASTHANDOFF)) {
4459                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4460                         if (asoc->deleted_primary != NULL) {
4461                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4462                                 goto out;
4463                         }
4464                         asoc->deleted_primary = net;
4465                         atomic_add_int(&net->ref_count, 1);
4466                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4467                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4468                         sctp_mobility_feature_on(stcb->sctp_ep,
4469                             SCTP_MOBILITY_PRIM_DELETED);
4470                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4471                             stcb->sctp_ep, stcb, NULL);
4472                 }
4473 out:
4474                 /* Try to find a confirmed primary */
4475                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4476         }
4477         if (net == asoc->last_data_chunk_from) {
4478                 /* Reset primary */
4479                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4480         }
4481         if (net == asoc->last_control_chunk_from) {
4482                 /* Clear net */
4483                 asoc->last_control_chunk_from = NULL;
4484         }
4485         if (net == stcb->asoc.alternate) {
4486                 sctp_free_remote_addr(stcb->asoc.alternate);
4487                 stcb->asoc.alternate = NULL;
4488         }
4489         sctp_free_remote_addr(net);
4490 }
4491
4492 /*
4493  * remove a remote endpoint address from an association, it will fail if the
4494  * address does not exist.
4495  */
4496 int
4497 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4498 {
4499         /*
4500          * Here we need to remove a remote address. This is quite simple, we
4501          * first find it in the list of address for the association
4502          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4503          * on that item. Note we do not allow it to be removed if there are
4504          * no other addresses.
4505          */
4506         struct sctp_association *asoc;
4507         struct sctp_nets *net, *nnet;
4508
4509         asoc = &stcb->asoc;
4510
4511         /* locate the address */
4512         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4513                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4514                         continue;
4515                 }
4516                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4517                     remaddr)) {
4518                         /* we found the guy */
4519                         if (asoc->numnets < 2) {
4520                                 /* Must have at LEAST two remote addresses */
4521                                 return (-1);
4522                         } else {
4523                                 sctp_remove_net(stcb, net);
4524                                 return (0);
4525                         }
4526                 }
4527         }
4528         /* not found. */
4529         return (-2);
4530 }
4531
4532 void
4533 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4534 {
4535         struct sctpvtaghead *chain;
4536         struct sctp_tagblock *twait_block;
4537         int found = 0;
4538         int i;
4539
4540         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4541         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4542                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4543                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4544                             (twait_block->vtag_block[i].lport == lport) &&
4545                             (twait_block->vtag_block[i].rport == rport)) {
4546                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4547                                 twait_block->vtag_block[i].v_tag = 0;
4548                                 twait_block->vtag_block[i].lport = 0;
4549                                 twait_block->vtag_block[i].rport = 0;
4550                                 found = 1;
4551                                 break;
4552                         }
4553                 }
4554                 if (found)
4555                         break;
4556         }
4557 }
4558
4559 int
4560 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4561 {
4562         struct sctpvtaghead *chain;
4563         struct sctp_tagblock *twait_block;
4564         int found = 0;
4565         int i;
4566
4567         SCTP_INP_INFO_WLOCK();
4568         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4569         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4570                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4571                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4572                             (twait_block->vtag_block[i].lport == lport) &&
4573                             (twait_block->vtag_block[i].rport == rport)) {
4574                                 found = 1;
4575                                 break;
4576                         }
4577                 }
4578                 if (found)
4579                         break;
4580         }
4581         SCTP_INP_INFO_WUNLOCK();
4582         return (found);
4583 }
4584
4585
4586 void
4587 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4588 {
4589         struct sctpvtaghead *chain;
4590         struct sctp_tagblock *twait_block;
4591         struct timeval now;
4592         int set, i;
4593
4594         if (time == 0) {
4595                 /* Its disabled */
4596                 return;
4597         }
4598         (void)SCTP_GETTIME_TIMEVAL(&now);
4599         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4600         set = 0;
4601         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4602                 /* Block(s) present, lets find space, and expire on the fly */
4603                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4604                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4605                             !set) {
4606                                 twait_block->vtag_block[i].tv_sec_at_expire =
4607                                     now.tv_sec + time;
4608                                 twait_block->vtag_block[i].v_tag = tag;
4609                                 twait_block->vtag_block[i].lport = lport;
4610                                 twait_block->vtag_block[i].rport = rport;
4611                                 set = 1;
4612                         } else if ((twait_block->vtag_block[i].v_tag) &&
4613                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4614                                 /* Audit expires this guy */
4615                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4616                                 twait_block->vtag_block[i].v_tag = 0;
4617                                 twait_block->vtag_block[i].lport = 0;
4618                                 twait_block->vtag_block[i].rport = 0;
4619                                 if (set == 0) {
4620                                         /* Reuse it for my new tag */
4621                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4622                                         twait_block->vtag_block[i].v_tag = tag;
4623                                         twait_block->vtag_block[i].lport = lport;
4624                                         twait_block->vtag_block[i].rport = rport;
4625                                         set = 1;
4626                                 }
4627                         }
4628                 }
4629                 if (set) {
4630                         /*
4631                          * We only do up to the block where we can place our
4632                          * tag for audits
4633                          */
4634                         break;
4635                 }
4636         }
4637         /* Need to add a new block to chain */
4638         if (!set) {
4639                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4640                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4641                 if (twait_block == NULL) {
4642 #ifdef INVARIANTS
4643                         panic("Can not alloc tagblock");
4644 #endif
4645                         return;
4646                 }
4647                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4648                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4649                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4650                 twait_block->vtag_block[0].v_tag = tag;
4651                 twait_block->vtag_block[0].lport = lport;
4652                 twait_block->vtag_block[0].rport = rport;
4653         }
4654 }
4655
4656
4657
4658 /*-
4659  * Free the association after un-hashing the remote port. This
4660  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4661  * expect that the input to this function IS a locked TCB.
4662  * It will return 0, if it did NOT destroy the association (instead
4663  * it unlocks it. It will return NON-zero if it either destroyed the
4664  * association OR the association is already destroyed.
4665  */
4666 int
4667 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4668 {
4669         int i;
4670         struct sctp_association *asoc;
4671         struct sctp_nets *net, *nnet;
4672         struct sctp_laddr *laddr, *naddr;
4673         struct sctp_tmit_chunk *chk, *nchk;
4674         struct sctp_asconf_addr *aparam, *naparam;
4675         struct sctp_asconf_ack *aack, *naack;
4676         struct sctp_stream_reset_list *strrst, *nstrrst;
4677         struct sctp_queued_to_read *sq, *nsq;
4678         struct sctp_stream_queue_pending *sp, *nsp;
4679         sctp_sharedkey_t *shared_key, *nshared_key;
4680         struct socket *so;
4681
4682         /* first, lets purge the entry from the hash table. */
4683
4684 #ifdef SCTP_LOG_CLOSING
4685         sctp_log_closing(inp, stcb, 6);
4686 #endif
4687         if (stcb->asoc.state == 0) {
4688 #ifdef SCTP_LOG_CLOSING
4689                 sctp_log_closing(inp, NULL, 7);
4690 #endif
4691                 /* there is no asoc, really TSNH :-0 */
4692                 return (1);
4693         }
4694         if (stcb->asoc.alternate) {
4695                 sctp_free_remote_addr(stcb->asoc.alternate);
4696                 stcb->asoc.alternate = NULL;
4697         }
4698         /* TEMP CODE */
4699         if (stcb->freed_from_where == 0) {
4700                 /* Only record the first place free happened from */
4701                 stcb->freed_from_where = from_location;
4702         }
4703         /* TEMP CODE */
4704
4705         asoc = &stcb->asoc;
4706         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4707             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4708                 /* nothing around */
4709                 so = NULL;
4710         else
4711                 so = inp->sctp_socket;
4712
4713         /*
4714          * We used timer based freeing if a reader or writer is in the way.
4715          * So we first check if we are actually being called from a timer,
4716          * if so we abort early if a reader or writer is still in the way.
4717          */
4718         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4719             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4720                 /*
4721                  * is it the timer driving us? if so are the reader/writers
4722                  * gone?
4723                  */
4724                 if (stcb->asoc.refcnt) {
4725                         /* nope, reader or writer in the way */
4726                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4727                         /* no asoc destroyed */
4728                         SCTP_TCB_UNLOCK(stcb);
4729 #ifdef SCTP_LOG_CLOSING
4730                         sctp_log_closing(inp, stcb, 8);
4731 #endif
4732                         return (0);
4733                 }
4734         }
4735         /* now clean up any other timers */
4736         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4737         asoc->dack_timer.self = NULL;
4738         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4739         /*-
4740          * For stream reset we don't blast this unless
4741          * it is a str-reset timer, it might be the
4742          * free-asoc timer which we DON'T want to
4743          * disturb.
4744          */
4745         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4746                 asoc->strreset_timer.self = NULL;
4747         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4748         asoc->asconf_timer.self = NULL;
4749         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4750         asoc->autoclose_timer.self = NULL;
4751         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4752         asoc->shut_guard_timer.self = NULL;
4753         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4754         asoc->delayed_event_timer.self = NULL;
4755         /* Mobility adaptation */
4756         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4757         asoc->delete_prim_timer.self = NULL;
4758         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4759                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4760                 net->rxt_timer.self = NULL;
4761                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4762                 net->pmtu_timer.self = NULL;
4763                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4764                 net->hb_timer.self = NULL;
4765         }
4766         /* Now the read queue needs to be cleaned up (only once) */
4767         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4768                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4769                 SCTP_INP_READ_LOCK(inp);
4770                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4771                         if (sq->stcb == stcb) {
4772                                 sq->do_not_ref_stcb = 1;
4773                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4774                                 /*
4775                                  * If there is no end, there never will be
4776                                  * now.
4777                                  */
4778                                 if (sq->end_added == 0) {
4779                                         /* Held for PD-API clear that. */
4780                                         sq->pdapi_aborted = 1;
4781                                         sq->held_length = 0;
4782                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4783                                                 /*
4784                                                  * Need to add a PD-API
4785                                                  * aborted indication.
4786                                                  * Setting the control_pdapi
4787                                                  * assures that it will be
4788                                                  * added right after this
4789                                                  * msg.
4790                                                  */
4791                                                 uint32_t strseq;
4792
4793                                                 stcb->asoc.control_pdapi = sq;
4794                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4795                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4796                                                     stcb,
4797                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4798                                                     (void *)&strseq,
4799                                                     SCTP_SO_LOCKED);
4800                                                 stcb->asoc.control_pdapi = NULL;
4801                                         }
4802                                 }
4803                                 /* Add an end to wake them */
4804                                 sq->end_added = 1;
4805                         }
4806                 }
4807                 SCTP_INP_READ_UNLOCK(inp);
4808                 if (stcb->block_entry) {
4809                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4810                         stcb->block_entry->error = ECONNRESET;
4811                         stcb->block_entry = NULL;
4812                 }
4813         }
4814         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4815                 /*
4816                  * Someone holds a reference OR the socket is unaccepted
4817                  * yet.
4818                  */
4819                 if ((stcb->asoc.refcnt) ||
4820                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4821                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4822                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4823                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4824                 }
4825                 SCTP_TCB_UNLOCK(stcb);
4826                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4827                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4828                         /* nothing around */
4829                         so = NULL;
4830                 if (so) {
4831                         /* Wake any reader/writers */
4832                         sctp_sorwakeup(inp, so);
4833                         sctp_sowwakeup(inp, so);
4834                 }
4835 #ifdef SCTP_LOG_CLOSING
4836                 sctp_log_closing(inp, stcb, 9);
4837 #endif
4838                 /* no asoc destroyed */
4839                 return (0);
4840         }
4841 #ifdef SCTP_LOG_CLOSING
4842         sctp_log_closing(inp, stcb, 10);
4843 #endif
4844         /*
4845          * When I reach here, no others want to kill the assoc yet.. and I
4846          * own the lock. Now its possible an abort comes in when I do the
4847          * lock exchange below to grab all the locks to do the final take
4848          * out. to prevent this we increment the count, which will start a
4849          * timer and blow out above thus assuring us that we hold exclusive
4850          * killing of the asoc. Note that after getting back the TCB lock we
4851          * will go ahead and increment the counter back up and stop any
4852          * timer a passing stranger may have started :-S
4853          */
4854         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4855                 atomic_add_int(&stcb->asoc.refcnt, 1);
4856
4857                 SCTP_TCB_UNLOCK(stcb);
4858                 SCTP_INP_INFO_WLOCK();
4859                 SCTP_INP_WLOCK(inp);
4860                 SCTP_TCB_LOCK(stcb);
4861         }
4862         /* Double check the GONE flag */
4863         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4864             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4865                 /* nothing around */
4866                 so = NULL;
4867
4868         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4869             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4870                 /*
4871                  * For TCP type we need special handling when we are
4872                  * connected. We also include the peel'ed off ones to.
4873                  */
4874                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4875                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4876                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4877                         if (so) {
4878                                 SOCK_LOCK(so);
4879                                 if (so->so_rcv.sb_cc == 0) {
4880                                         so->so_state &= ~(SS_ISCONNECTING |
4881                                             SS_ISDISCONNECTING |
4882                                             SS_ISCONFIRMING |
4883                                             SS_ISCONNECTED);
4884                                 }
4885                                 socantrcvmore_locked(so);
4886                                 sctp_sowwakeup(inp, so);
4887                                 sctp_sorwakeup(inp, so);
4888                                 SCTP_SOWAKEUP(so);
4889                         }
4890                 }
4891         }
4892         /*
4893          * Make it invalid too, that way if its about to run it will abort
4894          * and return.
4895          */
4896         /* re-increment the lock */
4897         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4898                 atomic_add_int(&stcb->asoc.refcnt, -1);
4899         }
4900         if (stcb->asoc.refcnt) {
4901                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4902                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4903                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4904                         SCTP_INP_INFO_WUNLOCK();
4905                         SCTP_INP_WUNLOCK(inp);
4906                 }
4907                 SCTP_TCB_UNLOCK(stcb);
4908                 return (0);
4909         }
4910         asoc->state = 0;
4911         if (inp->sctp_tcbhash) {
4912                 LIST_REMOVE(stcb, sctp_tcbhash);
4913         }
4914         if (stcb->asoc.in_asocid_hash) {
4915                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4916         }
4917         /* Now lets remove it from the list of ALL associations in the EP */
4918         LIST_REMOVE(stcb, sctp_tcblist);
4919         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4920                 SCTP_INP_INCR_REF(inp);
4921                 SCTP_INP_WUNLOCK(inp);
4922         }
4923         /* pull from vtag hash */
4924         LIST_REMOVE(stcb, sctp_asocs);
4925         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4926             inp->sctp_lport, stcb->rport);
4927
4928         /*
4929          * Now restop the timers to be sure this is paranoia at is finest!
4930          */
4931         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4932         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4933         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4934         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4935         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4936         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4937         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4938         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4939                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4940                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4941                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4942         }
4943
4944         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4945         /*
4946          * The chunk lists and such SHOULD be empty but we check them just
4947          * in case.
4948          */
4949         /* anything on the wheel needs to be removed */
4950         for (i = 0; i < asoc->streamoutcnt; i++) {
4951                 struct sctp_stream_out *outs;
4952
4953                 outs = &asoc->strmout[i];
4954                 /* now clean up any chunks here */
4955                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4956                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4957                         sctp_free_spbufspace(stcb, asoc, sp);
4958                         if (sp->data) {
4959                                 if (so) {
4960                                         /* Still an open socket - report */
4961                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4962                                             0, (void *)sp, SCTP_SO_LOCKED);
4963                                 }
4964                                 if (sp->data) {
4965                                         sctp_m_freem(sp->data);
4966                                         sp->data = NULL;
4967                                         sp->tail_mbuf = NULL;
4968                                         sp->length = 0;
4969                                 }
4970                         }
4971                         if (sp->net) {
4972                                 sctp_free_remote_addr(sp->net);
4973                                 sp->net = NULL;
4974                         }
4975                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4976                 }
4977         }
4978         /* sa_ignore FREED_MEMORY */
4979         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4980                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4981                 SCTP_FREE(strrst, SCTP_M_STRESET);
4982         }
4983         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4984                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4985                 if (sq->data) {
4986                         sctp_m_freem(sq->data);
4987                         sq->data = NULL;
4988                 }
4989                 sctp_free_remote_addr(sq->whoFrom);
4990                 sq->whoFrom = NULL;
4991                 sq->stcb = NULL;
4992                 /* Free the ctl entry */
4993                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4994                 SCTP_DECR_READQ_COUNT();
4995                 /* sa_ignore FREED_MEMORY */
4996         }
4997         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4998                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4999                 if (chk->data) {
5000                         sctp_m_freem(chk->data);
5001                         chk->data = NULL;
5002                 }
5003                 if (chk->holds_key_ref)
5004                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5005                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5006                 SCTP_DECR_CHK_COUNT();
5007                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5008                 asoc->free_chunk_cnt--;
5009                 /* sa_ignore FREED_MEMORY */
5010         }
5011         /* pending send queue SHOULD be empty */
5012         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5013                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5014                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5015 #ifdef INVARIANTS
5016                 } else {
5017                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5018 #endif
5019                 }
5020                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5021                 if (chk->data) {
5022                         if (so) {
5023                                 /* Still a socket? */
5024                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5025                                     0, chk, SCTP_SO_LOCKED);
5026                         }
5027                         if (chk->data) {
5028                                 sctp_m_freem(chk->data);
5029                                 chk->data = NULL;
5030                         }
5031                 }
5032                 if (chk->holds_key_ref)
5033                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5034                 if (chk->whoTo) {
5035                         sctp_free_remote_addr(chk->whoTo);
5036                         chk->whoTo = NULL;
5037                 }
5038                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5039                 SCTP_DECR_CHK_COUNT();
5040                 /* sa_ignore FREED_MEMORY */
5041         }
5042         /* sent queue SHOULD be empty */
5043         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5044                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5045                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5046                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5047 #ifdef INVARIANTS
5048                         } else {
5049                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5050 #endif
5051                         }
5052                 }
5053                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5054                 if (chk->data) {
5055                         if (so) {
5056                                 /* Still a socket? */
5057                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5058                                     0, chk, SCTP_SO_LOCKED);
5059                         }
5060                         if (chk->data) {
5061                                 sctp_m_freem(chk->data);
5062                                 chk->data = NULL;
5063                         }
5064                 }
5065                 if (chk->holds_key_ref)
5066                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5067                 sctp_free_remote_addr(chk->whoTo);
5068                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5069                 SCTP_DECR_CHK_COUNT();
5070                 /* sa_ignore FREED_MEMORY */
5071         }
5072 #ifdef INVARIANTS
5073         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5074                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5075                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5076                 }
5077         }
5078 #endif
5079         /* control queue MAY not be empty */
5080         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5081                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5082                 if (chk->data) {
5083                         sctp_m_freem(chk->data);
5084                         chk->data = NULL;
5085                 }
5086                 if (chk->holds_key_ref)
5087                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5088                 sctp_free_remote_addr(chk->whoTo);
5089                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5090                 SCTP_DECR_CHK_COUNT();
5091                 /* sa_ignore FREED_MEMORY */
5092         }
5093         /* ASCONF queue MAY not be empty */
5094         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5095                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5096                 if (chk->data) {
5097                         sctp_m_freem(chk->data);
5098                         chk->data = NULL;
5099                 }
5100                 if (chk->holds_key_ref)
5101                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5102                 sctp_free_remote_addr(chk->whoTo);
5103                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5104                 SCTP_DECR_CHK_COUNT();
5105                 /* sa_ignore FREED_MEMORY */
5106         }
5107         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5108                 TAILQ_REMOVE(&asoc->reasmqueue, 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
5121         if (asoc->mapping_array) {
5122                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5123                 asoc->mapping_array = NULL;
5124         }
5125         if (asoc->nr_mapping_array) {
5126                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5127                 asoc->nr_mapping_array = NULL;
5128         }
5129         /* the stream outs */
5130         if (asoc->strmout) {
5131                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5132                 asoc->strmout = NULL;
5133         }
5134         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5135         if (asoc->strmin) {
5136                 struct sctp_queued_to_read *ctl, *nctl;
5137
5138                 for (i = 0; i < asoc->streamincnt; i++) {
5139                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5140                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5141                                 sctp_free_remote_addr(ctl->whoFrom);
5142                                 if (ctl->data) {
5143                                         sctp_m_freem(ctl->data);
5144                                         ctl->data = NULL;
5145                                 }
5146                                 /*
5147                                  * We don't free the address here since all
5148                                  * the net's were freed above.
5149                                  */
5150                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5151                                 SCTP_DECR_READQ_COUNT();
5152                         }
5153                 }
5154                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5155                 asoc->strmin = NULL;
5156         }
5157         asoc->streamincnt = 0;
5158         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5159 #ifdef INVARIANTS
5160                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5161                         panic("no net's left alloc'ed, or list points to itself");
5162                 }
5163 #endif
5164                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5165                 sctp_free_remote_addr(net);
5166         }
5167         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5168                 /* sa_ignore FREED_MEMORY */
5169                 sctp_remove_laddr(laddr);
5170         }
5171
5172         /* pending asconf (address) parameters */
5173         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5174                 /* sa_ignore FREED_MEMORY */
5175                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5176                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5177         }
5178         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5179                 /* sa_ignore FREED_MEMORY */
5180                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5181                 if (aack->data != NULL) {
5182                         sctp_m_freem(aack->data);
5183                 }
5184                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5185         }
5186         /* clean up auth stuff */
5187         if (asoc->local_hmacs)
5188                 sctp_free_hmaclist(asoc->local_hmacs);
5189         if (asoc->peer_hmacs)
5190                 sctp_free_hmaclist(asoc->peer_hmacs);
5191
5192         if (asoc->local_auth_chunks)
5193                 sctp_free_chunklist(asoc->local_auth_chunks);
5194         if (asoc->peer_auth_chunks)
5195                 sctp_free_chunklist(asoc->peer_auth_chunks);
5196
5197         sctp_free_authinfo(&asoc->authinfo);
5198
5199         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5200                 LIST_REMOVE(shared_key, next);
5201                 sctp_free_sharedkey(shared_key);
5202                 /* sa_ignore FREED_MEMORY */
5203         }
5204
5205         /* Insert new items here :> */
5206
5207         /* Get rid of LOCK */
5208         SCTP_TCB_UNLOCK(stcb);
5209         SCTP_TCB_LOCK_DESTROY(stcb);
5210         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5211         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5212                 SCTP_INP_INFO_WUNLOCK();
5213                 SCTP_INP_RLOCK(inp);
5214         }
5215 #ifdef SCTP_TRACK_FREED_ASOCS
5216         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5217                 /* now clean up the tasoc itself */
5218                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5219                 SCTP_DECR_ASOC_COUNT();
5220         } else {
5221                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5222         }
5223 #else
5224         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5225         SCTP_DECR_ASOC_COUNT();
5226 #endif
5227         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5228                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5229                         /*
5230                          * If its NOT the inp_free calling us AND sctp_close
5231                          * as been called, we call back...
5232                          */
5233                         SCTP_INP_RUNLOCK(inp);
5234                         /*
5235                          * This will start the kill timer (if we are the
5236                          * last one) since we hold an increment yet. But
5237                          * this is the only safe way to do this since
5238                          * otherwise if the socket closes at the same time
5239                          * we are here we might collide in the cleanup.
5240                          */
5241                         sctp_inpcb_free(inp,
5242                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5243                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5244                         SCTP_INP_DECR_REF(inp);
5245                         goto out_of;
5246                 } else {
5247                         /* The socket is still open. */
5248                         SCTP_INP_DECR_REF(inp);
5249                 }
5250         }
5251         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5252                 SCTP_INP_RUNLOCK(inp);
5253         }
5254 out_of:
5255         /* destroyed the asoc */
5256 #ifdef SCTP_LOG_CLOSING
5257         sctp_log_closing(inp, NULL, 11);
5258 #endif
5259         return (1);
5260 }
5261
5262
5263
5264 /*
5265  * determine if a destination is "reachable" based upon the addresses bound
5266  * to the current endpoint (e.g. only v4 or v6 currently bound)
5267  */
5268 /*
5269  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5270  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5271  * types bound as its endpoint
5272  */
5273 int
5274 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5275 {
5276         struct sctp_inpcb *inp;
5277         int answer;
5278
5279         /*
5280          * No locks here, the TCB, in all cases is already locked and an
5281          * assoc is up. There is either a INP lock by the caller applied (in
5282          * asconf case when deleting an address) or NOT in the HB case,
5283          * however if HB then the INP increment is up and the INP will not
5284          * be removed (on top of the fact that we have a TCB lock). So we
5285          * only want to read the sctp_flags, which is either bound-all or
5286          * not.. no protection needed since once an assoc is up you can't be
5287          * changing your binding.
5288          */
5289         inp = stcb->sctp_ep;
5290         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5291                 /* if bound all, destination is not restricted */
5292                 /*
5293                  * RRS: Question during lock work: Is this correct? If you
5294                  * are bound-all you still might need to obey the V4--V6
5295                  * flags??? IMO this bound-all stuff needs to be removed!
5296                  */
5297                 return (1);
5298         }
5299         /* NOTE: all "scope" checks are done when local addresses are added */
5300         switch (destaddr->sa_family) {
5301 #ifdef INET6
5302         case AF_INET6:
5303                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5304                 break;
5305 #endif
5306 #ifdef INET
5307         case AF_INET:
5308                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5309                 break;
5310 #endif
5311         default:
5312                 /* invalid family, so it's unreachable */
5313                 answer = 0;
5314                 break;
5315         }
5316         return (answer);
5317 }
5318
5319 /*
5320  * update the inp_vflags on an endpoint
5321  */
5322 static void
5323 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5324 {
5325         struct sctp_laddr *laddr;
5326
5327         /* first clear the flag */
5328         inp->ip_inp.inp.inp_vflag = 0;
5329         /* set the flag based on addresses on the ep list */
5330         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5331                 if (laddr->ifa == NULL) {
5332                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5333                             __func__);
5334                         continue;
5335                 }
5336                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5337                         continue;
5338                 }
5339                 switch (laddr->ifa->address.sa.sa_family) {
5340 #ifdef INET6
5341                 case AF_INET6:
5342                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5343                         break;
5344 #endif
5345 #ifdef INET
5346                 case AF_INET:
5347                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5348                         break;
5349 #endif
5350                 default:
5351                         break;
5352                 }
5353         }
5354 }
5355
5356 /*
5357  * Add the address to the endpoint local address list There is nothing to be
5358  * done if we are bound to all addresses
5359  */
5360 void
5361 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5362 {
5363         struct sctp_laddr *laddr;
5364         int fnd, error = 0;
5365
5366         fnd = 0;
5367
5368         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5369                 /* You are already bound to all. You have it already */
5370                 return;
5371         }
5372 #ifdef INET6
5373         if (ifa->address.sa.sa_family == AF_INET6) {
5374                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5375                         /* Can't bind a non-useable addr. */
5376                         return;
5377                 }
5378         }
5379 #endif
5380         /* first, is it already present? */
5381         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5382                 if (laddr->ifa == ifa) {
5383                         fnd = 1;
5384                         break;
5385                 }
5386         }
5387
5388         if (fnd == 0) {
5389                 /* Not in the ep list */
5390                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5391                 if (error != 0)
5392                         return;
5393                 inp->laddr_count++;
5394                 /* update inp_vflag flags */
5395                 switch (ifa->address.sa.sa_family) {
5396 #ifdef INET6
5397                 case AF_INET6:
5398                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5399                         break;
5400 #endif
5401 #ifdef INET
5402                 case AF_INET:
5403                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5404                         break;
5405 #endif
5406                 default:
5407                         break;
5408                 }
5409         }
5410         return;
5411 }
5412
5413
5414 /*
5415  * select a new (hopefully reachable) destination net (should only be used
5416  * when we deleted an ep addr that is the only usable source address to reach
5417  * the destination net)
5418  */
5419 static void
5420 sctp_select_primary_destination(struct sctp_tcb *stcb)
5421 {
5422         struct sctp_nets *net;
5423
5424         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5425                 /* for now, we'll just pick the first reachable one we find */
5426                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5427                         continue;
5428                 if (sctp_destination_is_reachable(stcb,
5429                     (struct sockaddr *)&net->ro._l_addr)) {
5430                         /* found a reachable destination */
5431                         stcb->asoc.primary_destination = net;
5432                 }
5433         }
5434         /* I can't there from here! ...we're gonna die shortly... */
5435 }
5436
5437
5438 /*
5439  * Delete the address from the endpoint local address list. There is nothing
5440  * to be done if we are bound to all addresses
5441  */
5442 void
5443 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5444 {
5445         struct sctp_laddr *laddr;
5446         int fnd;
5447
5448         fnd = 0;
5449         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5450                 /* You are already bound to all. You have it already */
5451                 return;
5452         }
5453         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5454                 if (laddr->ifa == ifa) {
5455                         fnd = 1;
5456                         break;
5457                 }
5458         }
5459         if (fnd && (inp->laddr_count < 2)) {
5460                 /* can't delete unless there are at LEAST 2 addresses */
5461                 return;
5462         }
5463         if (fnd) {
5464                 /*
5465                  * clean up any use of this address go through our
5466                  * associations and clear any last_used_address that match
5467                  * this one for each assoc, see if a new primary_destination
5468                  * is needed
5469                  */
5470                 struct sctp_tcb *stcb;
5471
5472                 /* clean up "next_addr_touse" */
5473                 if (inp->next_addr_touse == laddr)
5474                         /* delete this address */
5475                         inp->next_addr_touse = NULL;
5476
5477                 /* clean up "last_used_address" */
5478                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5479                         struct sctp_nets *net;
5480
5481                         SCTP_TCB_LOCK(stcb);
5482                         if (stcb->asoc.last_used_address == laddr)
5483                                 /* delete this address */
5484                                 stcb->asoc.last_used_address = NULL;
5485                         /*
5486                          * Now spin through all the nets and purge any ref
5487                          * to laddr
5488                          */
5489                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5490                                 if (net->ro._s_addr == laddr->ifa) {
5491                                         /* Yep, purge src address selected */
5492                                         sctp_rtentry_t *rt;
5493
5494                                         /* delete this address if cached */
5495                                         rt = net->ro.ro_rt;
5496                                         if (rt != NULL) {
5497                                                 RTFREE(rt);
5498                                                 net->ro.ro_rt = NULL;
5499                                         }
5500                                         sctp_free_ifa(net->ro._s_addr);
5501                                         net->ro._s_addr = NULL;
5502                                         net->src_addr_selected = 0;
5503                                 }
5504                         }
5505                         SCTP_TCB_UNLOCK(stcb);
5506                 }               /* for each tcb */
5507                 /* remove it from the ep list */
5508                 sctp_remove_laddr(laddr);
5509                 inp->laddr_count--;
5510                 /* update inp_vflag flags */
5511                 sctp_update_ep_vflag(inp);
5512         }
5513         return;
5514 }
5515
5516 /*
5517  * Add the address to the TCB local address restricted list.
5518  * This is a "pending" address list (eg. addresses waiting for an
5519  * ASCONF-ACK response) and cannot be used as a valid source address.
5520  */
5521 void
5522 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5523 {
5524         struct sctp_laddr *laddr;
5525         struct sctpladdr *list;
5526
5527         /*
5528          * Assumes TCB is locked.. and possibly the INP. May need to
5529          * confirm/fix that if we need it and is not the case.
5530          */
5531         list = &stcb->asoc.sctp_restricted_addrs;
5532
5533 #ifdef INET6
5534         if (ifa->address.sa.sa_family == AF_INET6) {
5535                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5536                         /* Can't bind a non-existent addr. */
5537                         return;
5538                 }
5539         }
5540 #endif
5541         /* does the address already exist? */
5542         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5543                 if (laddr->ifa == ifa) {
5544                         return;
5545                 }
5546         }
5547
5548         /* add to the list */
5549         (void)sctp_insert_laddr(list, ifa, 0);
5550         return;
5551 }
5552
5553 /*
5554  * Remove a local address from the TCB local address restricted list
5555  */
5556 void
5557 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5558 {
5559         struct sctp_inpcb *inp;
5560         struct sctp_laddr *laddr;
5561
5562         /*
5563          * This is called by asconf work. It is assumed that a) The TCB is
5564          * locked and b) The INP is locked. This is true in as much as I can
5565          * trace through the entry asconf code where I did these locks.
5566          * Again, the ASCONF code is a bit different in that it does lock
5567          * the INP during its work often times. This must be since we don't
5568          * want other proc's looking up things while what they are looking
5569          * up is changing :-D
5570          */
5571
5572         inp = stcb->sctp_ep;
5573         /* if subset bound and don't allow ASCONF's, can't delete last */
5574         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5575             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5576                 if (stcb->sctp_ep->laddr_count < 2) {
5577                         /* can't delete last address */
5578                         return;
5579                 }
5580         }
5581         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5582                 /* remove the address if it exists */
5583                 if (laddr->ifa == NULL)
5584                         continue;
5585                 if (laddr->ifa == ifa) {
5586                         sctp_remove_laddr(laddr);
5587                         return;
5588                 }
5589         }
5590
5591         /* address not found! */
5592         return;
5593 }
5594
5595 /*
5596  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5597  */
5598 /* sysctl */
5599 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5600 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5601
5602
5603
5604 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5605 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5606 int *sctp_cpuarry = NULL;
5607 void
5608 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5609 {
5610         /* Queue a packet to a processor for the specified core */
5611         struct sctp_mcore_queue *qent;
5612         struct sctp_mcore_ctrl *wkq;
5613         int need_wake = 0;
5614
5615         if (sctp_mcore_workers == NULL) {
5616                 /* Something went way bad during setup */
5617                 sctp_input_with_port(m, off, 0);
5618                 return;
5619         }
5620         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5621             (sizeof(struct sctp_mcore_queue)),
5622             SCTP_M_MCORE);
5623         if (qent == NULL) {
5624                 /* This is trouble  */
5625                 sctp_input_with_port(m, off, 0);
5626                 return;
5627         }
5628         qent->vn = curvnet;
5629         qent->m = m;
5630         qent->off = off;
5631         qent->v6 = 0;
5632         wkq = &sctp_mcore_workers[cpu_to_use];
5633         SCTP_MCORE_QLOCK(wkq);
5634
5635         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5636         if (wkq->running == 0) {
5637                 need_wake = 1;
5638         }
5639         SCTP_MCORE_QUNLOCK(wkq);
5640         if (need_wake) {
5641                 wakeup(&wkq->running);
5642         }
5643 }
5644
5645 static void
5646 sctp_mcore_thread(void *arg)
5647 {
5648
5649         struct sctp_mcore_ctrl *wkq;
5650         struct sctp_mcore_queue *qent;
5651
5652         wkq = (struct sctp_mcore_ctrl *)arg;
5653         struct mbuf *m;
5654         int off, v6;
5655
5656         /* Wait for first tickle */
5657         SCTP_MCORE_LOCK(wkq);
5658         wkq->running = 0;
5659         msleep(&wkq->running,
5660             &wkq->core_mtx,
5661             0, "wait for pkt", 0);
5662         SCTP_MCORE_UNLOCK(wkq);
5663
5664         /* Bind to our cpu */
5665         thread_lock(curthread);
5666         sched_bind(curthread, wkq->cpuid);
5667         thread_unlock(curthread);
5668
5669         /* Now lets start working */
5670         SCTP_MCORE_LOCK(wkq);
5671         /* Now grab lock and go */
5672         for (;;) {
5673                 SCTP_MCORE_QLOCK(wkq);
5674 skip_sleep:
5675                 wkq->running = 1;
5676                 qent = TAILQ_FIRST(&wkq->que);
5677                 if (qent) {
5678                         TAILQ_REMOVE(&wkq->que, qent, next);
5679                         SCTP_MCORE_QUNLOCK(wkq);
5680                         CURVNET_SET(qent->vn);
5681                         m = qent->m;
5682                         off = qent->off;
5683                         v6 = qent->v6;
5684                         SCTP_FREE(qent, SCTP_M_MCORE);
5685                         if (v6 == 0) {
5686                                 sctp_input_with_port(m, off, 0);
5687                         } else {
5688                                 SCTP_PRINTF("V6 not yet supported\n");
5689                                 sctp_m_freem(m);
5690                         }
5691                         CURVNET_RESTORE();
5692                         SCTP_MCORE_QLOCK(wkq);
5693                 }
5694                 wkq->running = 0;
5695                 if (!TAILQ_EMPTY(&wkq->que)) {
5696                         goto skip_sleep;
5697                 }
5698                 SCTP_MCORE_QUNLOCK(wkq);
5699                 msleep(&wkq->running,
5700                     &wkq->core_mtx,
5701                     0, "wait for pkt", 0);
5702         }
5703 }
5704
5705 static void
5706 sctp_startup_mcore_threads(void)
5707 {
5708         int i, cpu;
5709
5710         if (mp_ncpus == 1)
5711                 return;
5712
5713         if (sctp_mcore_workers != NULL) {
5714                 /*
5715                  * Already been here in some previous vnet?
5716                  */
5717                 return;
5718         }
5719         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5720             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5721             SCTP_M_MCORE);
5722         if (sctp_mcore_workers == NULL) {
5723                 /* TSNH I hope */
5724                 return;
5725         }
5726         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5727             sizeof(struct sctp_mcore_ctrl)));
5728         /* Init the structures */
5729         for (i = 0; i <= mp_maxid; i++) {
5730                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5731                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5732                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5733                 sctp_mcore_workers[i].cpuid = i;
5734         }
5735         if (sctp_cpuarry == NULL) {
5736                 SCTP_MALLOC(sctp_cpuarry, int *,
5737                     (mp_ncpus * sizeof(int)),
5738                     SCTP_M_MCORE);
5739                 i = 0;
5740                 CPU_FOREACH(cpu) {
5741                         sctp_cpuarry[i] = cpu;
5742                         i++;
5743                 }
5744         }
5745         /* Now start them all */
5746         CPU_FOREACH(cpu) {
5747                 (void)kproc_create(sctp_mcore_thread,
5748                     (void *)&sctp_mcore_workers[cpu],
5749                     &sctp_mcore_workers[cpu].thread_proc,
5750                     RFPROC,
5751                     SCTP_KTHREAD_PAGES,
5752                     SCTP_MCORE_NAME);
5753
5754         }
5755 }
5756
5757 #endif
5758
5759 void
5760 sctp_pcb_init()
5761 {
5762         /*
5763          * SCTP initialization for the PCB structures should be called by
5764          * the sctp_init() funciton.
5765          */
5766         int i;
5767         struct timeval tv;
5768
5769         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5770                 /* error I was called twice */
5771                 return;
5772         }
5773         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5774
5775 #if defined(SCTP_LOCAL_TRACE_BUF)
5776         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5777 #endif
5778 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5779         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5780             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5781             SCTP_M_MCORE);
5782 #endif
5783         (void)SCTP_GETTIME_TIMEVAL(&tv);
5784 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5785         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5786         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5787         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5788 #else
5789         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5790         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5791         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5792 #endif
5793         /* init the empty list of (All) Endpoints */
5794         LIST_INIT(&SCTP_BASE_INFO(listhead));
5795
5796
5797         /* init the hash table of endpoints */
5798         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5799         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5800         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5801         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5802             &SCTP_BASE_INFO(hashasocmark));
5803         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5804             &SCTP_BASE_INFO(hashmark));
5805         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5806             &SCTP_BASE_INFO(hashtcpmark));
5807         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5808
5809
5810         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5811             &SCTP_BASE_INFO(hashvrfmark));
5812
5813         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5814             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5815         /* init the zones */
5816         /*
5817          * FIX ME: Should check for NULL returns, but if it does fail we are
5818          * doomed to panic anyways... add later maybe.
5819          */
5820         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5821             sizeof(struct sctp_inpcb), maxsockets);
5822
5823         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5824             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5825
5826         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5827             sizeof(struct sctp_laddr),
5828             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5829
5830         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5831             sizeof(struct sctp_nets),
5832             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5833
5834         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5835             sizeof(struct sctp_tmit_chunk),
5836             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5837
5838         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5839             sizeof(struct sctp_queued_to_read),
5840             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5841
5842         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5843             sizeof(struct sctp_stream_queue_pending),
5844             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5845
5846         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5847             sizeof(struct sctp_asconf),
5848             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5849
5850         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5851             sizeof(struct sctp_asconf_ack),
5852             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5853
5854
5855         /* Master Lock INIT for info structure */
5856         SCTP_INP_INFO_LOCK_INIT();
5857         SCTP_STATLOG_INIT_LOCK();
5858
5859         SCTP_IPI_COUNT_INIT();
5860         SCTP_IPI_ADDR_INIT();
5861 #ifdef SCTP_PACKET_LOGGING
5862         SCTP_IP_PKTLOG_INIT();
5863 #endif
5864         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5865
5866         SCTP_WQ_ADDR_INIT();
5867         /* not sure if we need all the counts */
5868         SCTP_BASE_INFO(ipi_count_ep) = 0;
5869         /* assoc/tcb zone info */
5870         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5871         /* local addrlist zone info */
5872         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5873         /* remote addrlist zone info */
5874         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5875         /* chunk info */
5876         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5877
5878         /* socket queue zone info */
5879         SCTP_BASE_INFO(ipi_count_readq) = 0;
5880
5881         /* stream out queue cont */
5882         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5883
5884         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5885         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5886
5887         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5888
5889         /* Init the TIMEWAIT list */
5890         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5891                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5892         }
5893         sctp_startup_iterator();
5894
5895 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5896         sctp_startup_mcore_threads();
5897 #endif
5898
5899         /*
5900          * INIT the default VRF which for BSD is the only one, other O/S's
5901          * may have more. But initially they must start with one and then
5902          * add the VRF's as addresses are added.
5903          */
5904         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5905 }
5906
5907 /*
5908  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5909  */
5910 void
5911 sctp_pcb_finish(void)
5912 {
5913         struct sctp_vrflist *vrf_bucket;
5914         struct sctp_vrf *vrf, *nvrf;
5915         struct sctp_ifn *ifn, *nifn;
5916         struct sctp_ifa *ifa, *nifa;
5917         struct sctpvtaghead *chain;
5918         struct sctp_tagblock *twait_block, *prev_twait_block;
5919         struct sctp_laddr *wi, *nwi;
5920         int i;
5921         struct sctp_iterator *it, *nit;
5922
5923         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5924                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5925                 return;
5926         }
5927         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5928         /*
5929          * In FreeBSD the iterator thread never exits but we do clean up.
5930          * The only way FreeBSD reaches here is if we have VRF's but we
5931          * still add the ifdef to make it compile on old versions.
5932          */
5933 retry:
5934         SCTP_IPI_ITERATOR_WQ_LOCK();
5935         /*
5936          * sctp_iterator_worker() might be working on an it entry without
5937          * holding the lock.  We won't find it on the list either and
5938          * continue and free/destroy it.  While holding the lock, spin, to
5939          * avoid the race condition as sctp_iterator_worker() will have to
5940          * wait to re-aquire the lock.
5941          */
5942         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5943                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5944                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5945                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5946                 DELAY(10);
5947                 goto retry;
5948         }
5949         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5950                 if (it->vn != curvnet) {
5951                         continue;
5952                 }
5953                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5954                 if (it->function_atend != NULL) {
5955                         (*it->function_atend) (it->pointer, it->val);
5956                 }
5957                 SCTP_FREE(it, SCTP_M_ITER);
5958         }
5959         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5960         SCTP_ITERATOR_LOCK();
5961         if ((sctp_it_ctl.cur_it) &&
5962             (sctp_it_ctl.cur_it->vn == curvnet)) {
5963                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5964         }
5965         SCTP_ITERATOR_UNLOCK();
5966         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5967         SCTP_WQ_ADDR_LOCK();
5968         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5969                 LIST_REMOVE(wi, sctp_nxt_addr);
5970                 SCTP_DECR_LADDR_COUNT();
5971                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5972                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5973                 }
5974                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5975         }
5976         SCTP_WQ_ADDR_UNLOCK();
5977
5978         /*
5979          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5980          * destroyed first).
5981          */
5982         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5983         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5984                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5985                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5986                                 /* free the ifa */
5987                                 LIST_REMOVE(ifa, next_bucket);
5988                                 LIST_REMOVE(ifa, next_ifa);
5989                                 SCTP_FREE(ifa, SCTP_M_IFA);
5990                         }
5991                         /* free the ifn */
5992                         LIST_REMOVE(ifn, next_bucket);
5993                         LIST_REMOVE(ifn, next_ifn);
5994                         SCTP_FREE(ifn, SCTP_M_IFN);
5995                 }
5996                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5997                 /* free the vrf */
5998                 LIST_REMOVE(vrf, next_vrf);
5999                 SCTP_FREE(vrf, SCTP_M_VRF);
6000         }
6001         /* free the vrf hashes */
6002         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6003         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6004
6005         /*
6006          * free the TIMEWAIT list elements malloc'd in the function
6007          * sctp_add_vtag_to_timewait()...
6008          */
6009         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6010                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6011                 if (!LIST_EMPTY(chain)) {
6012                         prev_twait_block = NULL;
6013                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6014                                 if (prev_twait_block) {
6015                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6016                                 }
6017                                 prev_twait_block = twait_block;
6018                         }
6019                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6020                 }
6021         }
6022
6023         /* free the locks and mutexes */
6024 #ifdef SCTP_PACKET_LOGGING
6025         SCTP_IP_PKTLOG_DESTROY();
6026 #endif
6027         SCTP_IPI_ADDR_DESTROY();
6028         SCTP_STATLOG_DESTROY();
6029         SCTP_INP_INFO_LOCK_DESTROY();
6030
6031         SCTP_WQ_ADDR_DESTROY();
6032
6033         /* Get rid of other stuff too. */
6034         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6035                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6036         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6037                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6038         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6039                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6040
6041         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6042         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6043         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6044         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6045         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6046         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6047         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6048         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6049         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6050 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6051         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6052 #endif
6053 }
6054
6055
6056 int
6057 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6058     int offset, int limit,
6059     struct sockaddr *src, struct sockaddr *dst,
6060     struct sockaddr *altsa)
6061 {
6062         /*
6063          * grub through the INIT pulling addresses and loading them to the
6064          * nets structure in the asoc. The from address in the mbuf should
6065          * also be loaded (if it is not already). This routine can be called
6066          * with either INIT or INIT-ACK's as long as the m points to the IP
6067          * packet and the offset points to the beginning of the parameters.
6068          */
6069         struct sctp_inpcb *inp;
6070         struct sctp_nets *net, *nnet, *net_tmp;
6071         struct sctp_paramhdr *phdr, parm_buf;
6072         struct sctp_tcb *stcb_tmp;
6073         uint16_t ptype, plen;
6074         struct sockaddr *sa;
6075         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6076         struct sctp_auth_random *p_random = NULL;
6077         uint16_t random_len = 0;
6078         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6079         struct sctp_auth_hmac_algo *hmacs = NULL;
6080         uint16_t hmacs_len = 0;
6081         uint8_t saw_asconf = 0;
6082         uint8_t saw_asconf_ack = 0;
6083         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6084         struct sctp_auth_chunk_list *chunks = NULL;
6085         uint16_t num_chunks = 0;
6086         sctp_key_t *new_key;
6087         uint32_t keylen;
6088         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6089         uint8_t peer_supports_ecn;
6090         uint8_t peer_supports_prsctp;
6091         uint8_t peer_supports_auth;
6092         uint8_t peer_supports_asconf;
6093         uint8_t peer_supports_asconf_ack;
6094         uint8_t peer_supports_reconfig;
6095         uint8_t peer_supports_nrsack;
6096         uint8_t peer_supports_pktdrop;
6097
6098 #ifdef INET
6099         struct sockaddr_in sin;
6100
6101 #endif
6102 #ifdef INET6
6103         struct sockaddr_in6 sin6;
6104
6105 #endif
6106
6107         /* First get the destination address setup too. */
6108 #ifdef INET
6109         memset(&sin, 0, sizeof(sin));
6110         sin.sin_family = AF_INET;
6111         sin.sin_len = sizeof(sin);
6112         sin.sin_port = stcb->rport;
6113 #endif
6114 #ifdef INET6
6115         memset(&sin6, 0, sizeof(sin6));
6116         sin6.sin6_family = AF_INET6;
6117         sin6.sin6_len = sizeof(struct sockaddr_in6);
6118         sin6.sin6_port = stcb->rport;
6119 #endif
6120         if (altsa) {
6121                 sa = altsa;
6122         } else {
6123                 sa = src;
6124         }
6125         peer_supports_ecn = 0;
6126         peer_supports_prsctp = 0;
6127         peer_supports_auth = 0;
6128         peer_supports_asconf = 0;
6129         peer_supports_reconfig = 0;
6130         peer_supports_nrsack = 0;
6131         peer_supports_pktdrop = 0;
6132         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6133                 /* mark all addresses that we have currently on the list */
6134                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6135         }
6136         /* does the source address already exist? if so skip it */
6137         inp = stcb->sctp_ep;
6138         atomic_add_int(&stcb->asoc.refcnt, 1);
6139         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6140         atomic_add_int(&stcb->asoc.refcnt, -1);
6141
6142         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6143                 /* we must add the source address */
6144                 /* no scope set here since we have a tcb already. */
6145                 switch (sa->sa_family) {
6146 #ifdef INET
6147                 case AF_INET:
6148                         if (stcb->asoc.scope.ipv4_addr_legal) {
6149                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6150                                         return (-1);
6151                                 }
6152                         }
6153                         break;
6154 #endif
6155 #ifdef INET6
6156                 case AF_INET6:
6157                         if (stcb->asoc.scope.ipv6_addr_legal) {
6158                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6159                                         return (-2);
6160                                 }
6161                         }
6162                         break;
6163 #endif
6164                 default:
6165                         break;
6166                 }
6167         } else {
6168                 if (net_tmp != NULL && stcb_tmp == stcb) {
6169                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6170                 } else if (stcb_tmp != stcb) {
6171                         /* It belongs to another association? */
6172                         if (stcb_tmp)
6173                                 SCTP_TCB_UNLOCK(stcb_tmp);
6174                         return (-3);
6175                 }
6176         }
6177         if (stcb->asoc.state == 0) {
6178                 /* the assoc was freed? */
6179                 return (-4);
6180         }
6181         /* now we must go through each of the params. */
6182         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6183         while (phdr) {
6184                 ptype = ntohs(phdr->param_type);
6185                 plen = ntohs(phdr->param_length);
6186                 /*
6187                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6188                  * (uint32_t)ptype, (int)plen);
6189                  */
6190                 if (offset + plen > limit) {
6191                         break;
6192                 }
6193                 if (plen == 0) {
6194                         break;
6195                 }
6196 #ifdef INET
6197                 if (ptype == SCTP_IPV4_ADDRESS) {
6198                         if (stcb->asoc.scope.ipv4_addr_legal) {
6199                                 struct sctp_ipv4addr_param *p4, p4_buf;
6200
6201                                 /* ok get the v4 address and check/add */
6202                                 phdr = sctp_get_next_param(m, offset,
6203                                     (struct sctp_paramhdr *)&p4_buf,
6204                                     sizeof(p4_buf));
6205                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6206                                     phdr == NULL) {
6207                                         return (-5);
6208                                 }
6209                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6210                                 sin.sin_addr.s_addr = p4->addr;
6211                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6212                                         /* Skip multi-cast addresses */
6213                                         goto next_param;
6214                                 }
6215                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6216                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6217                                         goto next_param;
6218                                 }
6219                                 sa = (struct sockaddr *)&sin;
6220                                 inp = stcb->sctp_ep;
6221                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6222                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6223                                     dst, stcb);
6224                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6225
6226                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6227                                     inp == NULL) {
6228                                         /* we must add the source address */
6229                                         /*
6230                                          * no scope set since we have a tcb
6231                                          * already
6232                                          */
6233
6234                                         /*
6235                                          * we must validate the state again
6236                                          * here
6237                                          */
6238                         add_it_now:
6239                                         if (stcb->asoc.state == 0) {
6240                                                 /* the assoc was freed? */
6241                                                 return (-7);
6242                                         }
6243                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6244                                                 return (-8);
6245                                         }
6246                                 } else if (stcb_tmp == stcb) {
6247                                         if (stcb->asoc.state == 0) {
6248                                                 /* the assoc was freed? */
6249                                                 return (-10);
6250                                         }
6251                                         if (net != NULL) {
6252                                                 /* clear flag */
6253                                                 net->dest_state &=
6254                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6255                                         }
6256                                 } else {
6257                                         /*
6258                                          * strange, address is in another
6259                                          * assoc? straighten out locks.
6260                                          */
6261                                         if (stcb_tmp) {
6262                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6263                                                         struct mbuf *op_err;
6264                                                         char msg[SCTP_DIAG_INFO_LEN];
6265
6266                                                         /*
6267                                                          * in setup state we
6268                                                          * abort this guy
6269                                                          */
6270                                                         snprintf(msg, sizeof(msg),
6271                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6272                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6273                                                             msg);
6274                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6275                                                             stcb_tmp, op_err,
6276                                                             SCTP_SO_NOT_LOCKED);
6277                                                         goto add_it_now;
6278                                                 }
6279                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6280                                         }
6281                                         if (stcb->asoc.state == 0) {
6282                                                 /* the assoc was freed? */
6283                                                 return (-12);
6284                                         }
6285                                         return (-13);
6286                                 }
6287                         }
6288                 } else
6289 #endif
6290 #ifdef INET6
6291                 if (ptype == SCTP_IPV6_ADDRESS) {
6292                         if (stcb->asoc.scope.ipv6_addr_legal) {
6293                                 /* ok get the v6 address and check/add */
6294                                 struct sctp_ipv6addr_param *p6, p6_buf;
6295
6296                                 phdr = sctp_get_next_param(m, offset,
6297                                     (struct sctp_paramhdr *)&p6_buf,
6298                                     sizeof(p6_buf));
6299                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6300                                     phdr == NULL) {
6301                                         return (-14);
6302                                 }
6303                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6304                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6305                                     sizeof(p6->addr));
6306                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6307                                         /* Skip multi-cast addresses */
6308                                         goto next_param;
6309                                 }
6310                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6311                                         /*
6312                                          * Link local make no sense without
6313                                          * scope
6314                                          */
6315                                         goto next_param;
6316                                 }
6317                                 sa = (struct sockaddr *)&sin6;
6318                                 inp = stcb->sctp_ep;
6319                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6320                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6321                                     dst, stcb);
6322                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6323                                 if (stcb_tmp == NULL &&
6324                                     (inp == stcb->sctp_ep || inp == NULL)) {
6325                                         /*
6326                                          * we must validate the state again
6327                                          * here
6328                                          */
6329                         add_it_now6:
6330                                         if (stcb->asoc.state == 0) {
6331                                                 /* the assoc was freed? */
6332                                                 return (-16);
6333                                         }
6334                                         /*
6335                                          * we must add the address, no scope
6336                                          * set
6337                                          */
6338                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6339                                                 return (-17);
6340                                         }
6341                                 } else if (stcb_tmp == stcb) {
6342                                         /*
6343                                          * we must validate the state again
6344                                          * here
6345                                          */
6346                                         if (stcb->asoc.state == 0) {
6347                                                 /* the assoc was freed? */
6348                                                 return (-19);
6349                                         }
6350                                         if (net != NULL) {
6351                                                 /* clear flag */
6352                                                 net->dest_state &=
6353                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6354                                         }
6355                                 } else {
6356                                         /*
6357                                          * strange, address is in another
6358                                          * assoc? straighten out locks.
6359                                          */
6360                                         if (stcb_tmp) {
6361                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6362                                                         struct mbuf *op_err;
6363                                                         char msg[SCTP_DIAG_INFO_LEN];
6364
6365                                                         /*
6366                                                          * in setup state we
6367                                                          * abort this guy
6368                                                          */
6369                                                         snprintf(msg, sizeof(msg),
6370                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6371                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6372                                                             msg);
6373                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6374                                                             stcb_tmp, op_err,
6375                                                             SCTP_SO_NOT_LOCKED);
6376                                                         goto add_it_now6;
6377                                                 }
6378                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6379                                         }
6380                                         if (stcb->asoc.state == 0) {
6381                                                 /* the assoc was freed? */
6382                                                 return (-21);
6383                                         }
6384                                         return (-22);
6385                                 }
6386                         }
6387                 } else
6388 #endif
6389                 if (ptype == SCTP_ECN_CAPABLE) {
6390                         peer_supports_ecn = 1;
6391                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6392                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6393                                 struct sctp_adaptation_layer_indication ai,
6394                                                                 *aip;
6395
6396                                 phdr = sctp_get_next_param(m, offset,
6397                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6398                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6399                                 if (aip) {
6400                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6401                                         stcb->asoc.adaptation_needed = 1;
6402                                 }
6403                         }
6404                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6405                         struct sctp_asconf_addr_param lstore, *fee;
6406                         int lptype;
6407                         struct sockaddr *lsa = NULL;
6408
6409 #ifdef INET
6410                         struct sctp_asconf_addrv4_param *fii;
6411
6412 #endif
6413
6414                         if (stcb->asoc.asconf_supported == 0) {
6415                                 return (-100);
6416                         }
6417                         if (plen > sizeof(lstore)) {
6418                                 return (-23);
6419                         }
6420                         phdr = sctp_get_next_param(m, offset,
6421                             (struct sctp_paramhdr *)&lstore,
6422                             min(plen, sizeof(lstore)));
6423                         if (phdr == NULL) {
6424                                 return (-24);
6425                         }
6426                         fee = (struct sctp_asconf_addr_param *)phdr;
6427                         lptype = ntohs(fee->addrp.ph.param_type);
6428                         switch (lptype) {
6429 #ifdef INET
6430                         case SCTP_IPV4_ADDRESS:
6431                                 if (plen !=
6432                                     sizeof(struct sctp_asconf_addrv4_param)) {
6433                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6434                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6435                                             plen);
6436                                 } else {
6437                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6438                                         sin.sin_addr.s_addr = fii->addrp.addr;
6439                                         lsa = (struct sockaddr *)&sin;
6440                                 }
6441                                 break;
6442 #endif
6443 #ifdef INET6
6444                         case SCTP_IPV6_ADDRESS:
6445                                 if (plen !=
6446                                     sizeof(struct sctp_asconf_addr_param)) {
6447                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6448                                             (int)sizeof(struct sctp_asconf_addr_param),
6449                                             plen);
6450                                 } else {
6451                                         memcpy(sin6.sin6_addr.s6_addr,
6452                                             fee->addrp.addr,
6453                                             sizeof(fee->addrp.addr));
6454                                         lsa = (struct sockaddr *)&sin6;
6455                                 }
6456                                 break;
6457 #endif
6458                         default:
6459                                 break;
6460                         }
6461                         if (lsa) {
6462                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6463                         }
6464                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6465                         stcb->asoc.peer_supports_nat = 1;
6466                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6467                         /* Peer supports pr-sctp */
6468                         peer_supports_prsctp = 1;
6469                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6470                         /* A supported extension chunk */
6471                         struct sctp_supported_chunk_types_param *pr_supported;
6472                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6473                         int num_ent, i;
6474
6475                         phdr = sctp_get_next_param(m, offset,
6476                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6477                         if (phdr == NULL) {
6478                                 return (-25);
6479                         }
6480                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6481                         num_ent = plen - sizeof(struct sctp_paramhdr);
6482                         for (i = 0; i < num_ent; i++) {
6483                                 switch (pr_supported->chunk_types[i]) {
6484                                 case SCTP_ASCONF:
6485                                         peer_supports_asconf = 1;
6486                                         break;
6487                                 case SCTP_ASCONF_ACK:
6488                                         peer_supports_asconf_ack = 1;
6489                                         break;
6490                                 case SCTP_FORWARD_CUM_TSN:
6491                                         peer_supports_prsctp = 1;
6492                                         break;
6493                                 case SCTP_PACKET_DROPPED:
6494                                         peer_supports_pktdrop = 1;
6495                                         break;
6496                                 case SCTP_NR_SELECTIVE_ACK:
6497                                         peer_supports_nrsack = 1;
6498                                         break;
6499                                 case SCTP_STREAM_RESET:
6500                                         peer_supports_reconfig = 1;
6501                                         break;
6502                                 case SCTP_AUTHENTICATION:
6503                                         peer_supports_auth = 1;
6504                                         break;
6505                                 default:
6506                                         /* one I have not learned yet */
6507                                         break;
6508
6509                                 }
6510                         }
6511                 } else if (ptype == SCTP_RANDOM) {
6512                         if (plen > sizeof(random_store))
6513                                 break;
6514                         if (got_random) {
6515                                 /* already processed a RANDOM */
6516                                 goto next_param;
6517                         }
6518                         phdr = sctp_get_next_param(m, offset,
6519                             (struct sctp_paramhdr *)random_store,
6520                             min(sizeof(random_store), plen));
6521                         if (phdr == NULL)
6522                                 return (-26);
6523                         p_random = (struct sctp_auth_random *)phdr;
6524                         random_len = plen - sizeof(*p_random);
6525                         /* enforce the random length */
6526                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6527                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6528                                 return (-27);
6529                         }
6530                         got_random = 1;
6531                 } else if (ptype == SCTP_HMAC_LIST) {
6532                         uint16_t num_hmacs;
6533                         uint16_t i;
6534
6535                         if (plen > sizeof(hmacs_store))
6536                                 break;
6537                         if (got_hmacs) {
6538                                 /* already processed a HMAC list */
6539                                 goto next_param;
6540                         }
6541                         phdr = sctp_get_next_param(m, offset,
6542                             (struct sctp_paramhdr *)hmacs_store,
6543                             min(plen, sizeof(hmacs_store)));
6544                         if (phdr == NULL)
6545                                 return (-28);
6546                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6547                         hmacs_len = plen - sizeof(*hmacs);
6548                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6549                         /* validate the hmac list */
6550                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6551                                 return (-29);
6552                         }
6553                         if (stcb->asoc.peer_hmacs != NULL)
6554                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6555                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6556                         if (stcb->asoc.peer_hmacs != NULL) {
6557                                 for (i = 0; i < num_hmacs; i++) {
6558                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6559                                             ntohs(hmacs->hmac_ids[i]));
6560                                 }
6561                         }
6562                         got_hmacs = 1;
6563                 } else if (ptype == SCTP_CHUNK_LIST) {
6564                         int i;
6565
6566                         if (plen > sizeof(chunks_store))
6567                                 break;
6568                         if (got_chklist) {
6569                                 /* already processed a Chunks list */
6570                                 goto next_param;
6571                         }
6572                         phdr = sctp_get_next_param(m, offset,
6573                             (struct sctp_paramhdr *)chunks_store,
6574                             min(plen, sizeof(chunks_store)));
6575                         if (phdr == NULL)
6576                                 return (-30);
6577                         chunks = (struct sctp_auth_chunk_list *)phdr;
6578                         num_chunks = plen - sizeof(*chunks);
6579                         if (stcb->asoc.peer_auth_chunks != NULL)
6580                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6581                         else
6582                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6583                         for (i = 0; i < num_chunks; i++) {
6584                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6585                                     stcb->asoc.peer_auth_chunks);
6586                                 /* record asconf/asconf-ack if listed */
6587                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6588                                         saw_asconf = 1;
6589                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6590                                         saw_asconf_ack = 1;
6591
6592                         }
6593                         got_chklist = 1;
6594                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6595                             (ptype == SCTP_STATE_COOKIE) ||
6596                             (ptype == SCTP_UNRECOG_PARAM) ||
6597                             (ptype == SCTP_COOKIE_PRESERVE) ||
6598                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6599                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6600                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6601                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6602                     (ptype == SCTP_SUCCESS_REPORT)) {
6603                          /* don't care */ ;
6604                 } else {
6605                         if ((ptype & 0x8000) == 0x0000) {
6606                                 /*
6607                                  * must stop processing the rest of the
6608                                  * param's. Any report bits were handled
6609                                  * with the call to
6610                                  * sctp_arethere_unrecognized_parameters()
6611                                  * when the INIT or INIT-ACK was first seen.
6612                                  */
6613                                 break;
6614                         }
6615                 }
6616
6617 next_param:
6618                 offset += SCTP_SIZE32(plen);
6619                 if (offset >= limit) {
6620                         break;
6621                 }
6622                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6623                     sizeof(parm_buf));
6624         }
6625         /* Now check to see if we need to purge any addresses */
6626         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6627                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6628                     SCTP_ADDR_NOT_IN_ASSOC) {
6629                         /* This address has been removed from the asoc */
6630                         /* remove and free it */
6631                         stcb->asoc.numnets--;
6632                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6633                         sctp_free_remote_addr(net);
6634                         if (net == stcb->asoc.primary_destination) {
6635                                 stcb->asoc.primary_destination = NULL;
6636                                 sctp_select_primary_destination(stcb);
6637                         }
6638                 }
6639         }
6640         if ((stcb->asoc.ecn_supported == 1) &&
6641             (peer_supports_ecn == 0)) {
6642                 stcb->asoc.ecn_supported = 0;
6643         }
6644         if ((stcb->asoc.prsctp_supported == 1) &&
6645             (peer_supports_prsctp == 0)) {
6646                 stcb->asoc.prsctp_supported = 0;
6647         }
6648         if ((stcb->asoc.auth_supported == 1) &&
6649             ((peer_supports_auth == 0) ||
6650             (got_random == 0) || (got_hmacs == 0))) {
6651                 stcb->asoc.auth_supported = 0;
6652         }
6653         if ((stcb->asoc.asconf_supported == 1) &&
6654             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6655             (stcb->asoc.auth_supported == 0) ||
6656             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6657                 stcb->asoc.asconf_supported = 0;
6658         }
6659         if ((stcb->asoc.reconfig_supported == 1) &&
6660             (peer_supports_reconfig == 0)) {
6661                 stcb->asoc.reconfig_supported = 0;
6662         }
6663         if ((stcb->asoc.nrsack_supported == 1) &&
6664             (peer_supports_nrsack == 0)) {
6665                 stcb->asoc.nrsack_supported = 0;
6666         }
6667         if ((stcb->asoc.pktdrop_supported == 1) &&
6668             (peer_supports_pktdrop == 0)) {
6669                 stcb->asoc.pktdrop_supported = 0;
6670         }
6671         /* validate authentication required parameters */
6672         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6673                 /* peer does not support auth but sent a chunks list? */
6674                 return (-31);
6675         }
6676         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6677                 /* peer supports asconf but not auth? */
6678                 return (-32);
6679         } else if ((peer_supports_asconf == 1) &&
6680                     (peer_supports_auth == 1) &&
6681             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6682                 return (-33);
6683         }
6684         /* concatenate the full random key */
6685         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6686         if (chunks != NULL) {
6687                 keylen += sizeof(*chunks) + num_chunks;
6688         }
6689         new_key = sctp_alloc_key(keylen);
6690         if (new_key != NULL) {
6691                 /* copy in the RANDOM */
6692                 if (p_random != NULL) {
6693                         keylen = sizeof(*p_random) + random_len;
6694                         bcopy(p_random, new_key->key, keylen);
6695                 }
6696                 /* append in the AUTH chunks */
6697                 if (chunks != NULL) {
6698                         bcopy(chunks, new_key->key + keylen,
6699                             sizeof(*chunks) + num_chunks);
6700                         keylen += sizeof(*chunks) + num_chunks;
6701                 }
6702                 /* append in the HMACs */
6703                 if (hmacs != NULL) {
6704                         bcopy(hmacs, new_key->key + keylen,
6705                             sizeof(*hmacs) + hmacs_len);
6706                 }
6707         } else {
6708                 /* failed to get memory for the key */
6709                 return (-34);
6710         }
6711         if (stcb->asoc.authinfo.peer_random != NULL)
6712                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6713         stcb->asoc.authinfo.peer_random = new_key;
6714         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6715         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6716
6717         return (0);
6718 }
6719
6720 int
6721 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6722     struct sctp_nets *net)
6723 {
6724         /* make sure the requested primary address exists in the assoc */
6725         if (net == NULL && sa)
6726                 net = sctp_findnet(stcb, sa);
6727
6728         if (net == NULL) {
6729                 /* didn't find the requested primary address! */
6730                 return (-1);
6731         } else {
6732                 /* set the primary address */
6733                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6734                         /* Must be confirmed, so queue to set */
6735                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6736                         return (0);
6737                 }
6738                 stcb->asoc.primary_destination = net;
6739                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6740                         sctp_free_remote_addr(stcb->asoc.alternate);
6741                         stcb->asoc.alternate = NULL;
6742                 }
6743                 net = TAILQ_FIRST(&stcb->asoc.nets);
6744                 if (net != stcb->asoc.primary_destination) {
6745                         /*
6746                          * first one on the list is NOT the primary
6747                          * sctp_cmpaddr() is much more efficient if the
6748                          * primary is the first on the list, make it so.
6749                          */
6750                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6751                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6752                 }
6753                 return (0);
6754         }
6755 }
6756
6757 int
6758 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6759 {
6760         /*
6761          * This function serves two purposes. It will see if a TAG can be
6762          * re-used and return 1 for yes it is ok and 0 for don't use that
6763          * tag. A secondary function it will do is purge out old tags that
6764          * can be removed.
6765          */
6766         struct sctpvtaghead *chain;
6767         struct sctp_tagblock *twait_block;
6768         struct sctpasochead *head;
6769         struct sctp_tcb *stcb;
6770         int i;
6771
6772         SCTP_INP_INFO_RLOCK();
6773         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6774             SCTP_BASE_INFO(hashasocmark))];
6775         LIST_FOREACH(stcb, head, sctp_asocs) {
6776                 /*
6777                  * We choose not to lock anything here. TCB's can't be
6778                  * removed since we have the read lock, so they can't be
6779                  * freed on us, same thing for the INP. I may be wrong with
6780                  * this assumption, but we will go with it for now :-)
6781                  */
6782                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6783                         continue;
6784                 }
6785                 if (stcb->asoc.my_vtag == tag) {
6786                         /* candidate */
6787                         if (stcb->rport != rport) {
6788                                 continue;
6789                         }
6790                         if (stcb->sctp_ep->sctp_lport != lport) {
6791                                 continue;
6792                         }
6793                         /* Its a used tag set */
6794                         SCTP_INP_INFO_RUNLOCK();
6795                         return (0);
6796                 }
6797         }
6798         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6799         /* Now what about timed wait ? */
6800         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6801                 /*
6802                  * Block(s) are present, lets see if we have this tag in the
6803                  * list
6804                  */
6805                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6806                         if (twait_block->vtag_block[i].v_tag == 0) {
6807                                 /* not used */
6808                                 continue;
6809                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6810                             now->tv_sec) {
6811                                 /* Audit expires this guy */
6812                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6813                                 twait_block->vtag_block[i].v_tag = 0;
6814                                 twait_block->vtag_block[i].lport = 0;
6815                                 twait_block->vtag_block[i].rport = 0;
6816                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6817                                     (twait_block->vtag_block[i].lport == lport) &&
6818                             (twait_block->vtag_block[i].rport == rport)) {
6819                                 /* Bad tag, sorry :< */
6820                                 SCTP_INP_INFO_RUNLOCK();
6821                                 return (0);
6822                         }
6823                 }
6824         }
6825         SCTP_INP_INFO_RUNLOCK();
6826         return (1);
6827 }
6828
6829 static void
6830 sctp_drain_mbufs(struct sctp_tcb *stcb)
6831 {
6832         /*
6833          * We must hunt this association for MBUF's past the cumack (i.e.
6834          * out of order data that we can renege on).
6835          */
6836         struct sctp_association *asoc;
6837         struct sctp_tmit_chunk *chk, *nchk;
6838         uint32_t cumulative_tsn_p1;
6839         struct sctp_queued_to_read *ctl, *nctl;
6840         int cnt, strmat;
6841         uint32_t gap, i;
6842         int fnd = 0;
6843
6844         /* We look for anything larger than the cum-ack + 1 */
6845
6846         asoc = &stcb->asoc;
6847         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6848                 /* none we can reneg on. */
6849                 return;
6850         }
6851         SCTP_STAT_INCR(sctps_protocol_drains_done);
6852         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6853         cnt = 0;
6854         /* First look in the re-assembly queue */
6855         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6856                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6857                         /* Yep it is above cum-ack */
6858                         cnt++;
6859                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6860                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6861                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6862                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6863                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6864                         if (chk->data) {
6865                                 sctp_m_freem(chk->data);
6866                                 chk->data = NULL;
6867                         }
6868                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6869                 }
6870         }
6871         /* Ok that was fun, now we will drain all the inbound streams? */
6872         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6873                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6874                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6875                                 /* Yep it is above cum-ack */
6876                                 cnt++;
6877                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6878                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6879                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6880                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6881                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6882                                 if (ctl->data) {
6883                                         sctp_m_freem(ctl->data);
6884                                         ctl->data = NULL;
6885                                 }
6886                                 sctp_free_remote_addr(ctl->whoFrom);
6887                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6888                                 SCTP_DECR_READQ_COUNT();
6889                         }
6890                 }
6891         }
6892         if (cnt) {
6893                 /* We must back down to see what the new highest is */
6894                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6895                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6896                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6897                                 asoc->highest_tsn_inside_map = i;
6898                                 fnd = 1;
6899                                 break;
6900                         }
6901                 }
6902                 if (!fnd) {
6903                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6904                 }
6905                 /*
6906                  * Question, should we go through the delivery queue? The
6907                  * only reason things are on here is the app not reading OR
6908                  * a p-d-api up. An attacker COULD send enough in to
6909                  * initiate the PD-API and then send a bunch of stuff to
6910                  * other streams... these would wind up on the delivery
6911                  * queue.. and then we would not get to them. But in order
6912                  * to do this I then have to back-track and un-deliver
6913                  * sequence numbers in streams.. el-yucko. I think for now
6914                  * we will NOT look at the delivery queue and leave it to be
6915                  * something to consider later. An alternative would be to
6916                  * abort the P-D-API with a notification and then deliver
6917                  * the data.... Or another method might be to keep track of
6918                  * how many times the situation occurs and if we see a
6919                  * possible attack underway just abort the association.
6920                  */
6921 #ifdef SCTP_DEBUG
6922                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6923 #endif
6924                 /*
6925                  * Now do we need to find a new
6926                  * asoc->highest_tsn_inside_map?
6927                  */
6928                 asoc->last_revoke_count = cnt;
6929                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6930                 /* sa_ignore NO_NULL_CHK */
6931                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6932                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6933         }
6934         /*
6935          * Another issue, in un-setting the TSN's in the mapping array we
6936          * DID NOT adjust the highest_tsn marker.  This will cause one of
6937          * two things to occur. It may cause us to do extra work in checking
6938          * for our mapping array movement. More importantly it may cause us
6939          * to SACK every datagram. This may not be a bad thing though since
6940          * we will recover once we get our cum-ack above and all this stuff
6941          * we dumped recovered.
6942          */
6943 }
6944
6945 void
6946 sctp_drain()
6947 {
6948         /*
6949          * We must walk the PCB lists for ALL associations here. The system
6950          * is LOW on MBUF's and needs help. This is where reneging will
6951          * occur. We really hope this does NOT happen!
6952          */
6953         VNET_ITERATOR_DECL(vnet_iter);
6954         VNET_LIST_RLOCK_NOSLEEP();
6955         VNET_FOREACH(vnet_iter) {
6956                 CURVNET_SET(vnet_iter);
6957                 struct sctp_inpcb *inp;
6958                 struct sctp_tcb *stcb;
6959
6960                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6961                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6962 #ifdef VIMAGE
6963                         continue;
6964 #else
6965                         return;
6966 #endif
6967                 }
6968                 SCTP_INP_INFO_RLOCK();
6969                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6970                         /* For each endpoint */
6971                         SCTP_INP_RLOCK(inp);
6972                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6973                                 /* For each association */
6974                                 SCTP_TCB_LOCK(stcb);
6975                                 sctp_drain_mbufs(stcb);
6976                                 SCTP_TCB_UNLOCK(stcb);
6977                         }
6978                         SCTP_INP_RUNLOCK(inp);
6979                 }
6980                 SCTP_INP_INFO_RUNLOCK();
6981                 CURVNET_RESTORE();
6982         }
6983         VNET_LIST_RUNLOCK_NOSLEEP();
6984 }
6985
6986 /*
6987  * start a new iterator
6988  * iterates through all endpoints and associations based on the pcb_state
6989  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6990  * assocs and "ef" (optional) is executed when the iterator completes.
6991  * "inpf" (optional) is executed for each new endpoint as it is being
6992  * iterated through. inpe (optional) is called when the inp completes
6993  * its way through all the stcbs.
6994  */
6995 int
6996 sctp_initiate_iterator(inp_func inpf,
6997     asoc_func af,
6998     inp_func inpe,
6999     uint32_t pcb_state,
7000     uint32_t pcb_features,
7001     uint32_t asoc_state,
7002     void *argp,
7003     uint32_t argi,
7004     end_func ef,
7005     struct sctp_inpcb *s_inp,
7006     uint8_t chunk_output_off)
7007 {
7008         struct sctp_iterator *it = NULL;
7009
7010         if (af == NULL) {
7011                 return (-1);
7012         }
7013         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7014                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7015                     SCTP_BASE_VAR(sctp_pcb_initialized));
7016                 return (-1);
7017         }
7018         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7019             SCTP_M_ITER);
7020         if (it == NULL) {
7021                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7022                 return (ENOMEM);
7023         }
7024         memset(it, 0, sizeof(*it));
7025         it->function_assoc = af;
7026         it->function_inp = inpf;
7027         if (inpf)
7028                 it->done_current_ep = 0;
7029         else
7030                 it->done_current_ep = 1;
7031         it->function_atend = ef;
7032         it->pointer = argp;
7033         it->val = argi;
7034         it->pcb_flags = pcb_state;
7035         it->pcb_features = pcb_features;
7036         it->asoc_state = asoc_state;
7037         it->function_inp_end = inpe;
7038         it->no_chunk_output = chunk_output_off;
7039         it->vn = curvnet;
7040         if (s_inp) {
7041                 /* Assume lock is held here */
7042                 it->inp = s_inp;
7043                 SCTP_INP_INCR_REF(it->inp);
7044                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7045         } else {
7046                 SCTP_INP_INFO_RLOCK();
7047                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7048                 if (it->inp) {
7049                         SCTP_INP_INCR_REF(it->inp);
7050                 }
7051                 SCTP_INP_INFO_RUNLOCK();
7052                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7053
7054         }
7055         SCTP_IPI_ITERATOR_WQ_LOCK();
7056         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7057                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7058                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7059                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7060                 SCTP_FREE(it, SCTP_M_ITER);
7061                 return (-1);
7062         }
7063         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7064         if (sctp_it_ctl.iterator_running == 0) {
7065                 sctp_wakeup_iterator();
7066         }
7067         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7068         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7069         return (0);
7070 }