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         int find_tcp_pool;
2260         struct sctp_tcb *stcb;
2261         struct sctp_inpcb *inp;
2262
2263         if (sh->v_tag) {
2264                 /* we only go down this path if vtag is non-zero */
2265                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2266                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2267                 if (stcb) {
2268                         return (stcb);
2269                 }
2270         }
2271         find_tcp_pool = 0;
2272         if ((ch->chunk_type != SCTP_INITIATION) &&
2273             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2274             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2275             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2276                 /* Other chunk types go to the tcp pool. */
2277                 find_tcp_pool = 1;
2278         }
2279         if (inp_p) {
2280                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2281                     find_tcp_pool, vrf_id);
2282                 inp = *inp_p;
2283         } else {
2284                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2285                     find_tcp_pool, vrf_id);
2286         }
2287         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2288         if (stcb == NULL && inp) {
2289                 /* Found a EP but not this address */
2290                 if ((ch->chunk_type == SCTP_INITIATION) ||
2291                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2292                         /*-
2293                          * special hook, we do NOT return linp or an
2294                          * association that is linked to an existing
2295                          * association that is under the TCP pool (i.e. no
2296                          * listener exists). The endpoint finding routine
2297                          * will always find a listener before examining the
2298                          * TCP pool.
2299                          */
2300                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2301                                 if (inp_p) {
2302                                         *inp_p = NULL;
2303                                 }
2304                                 return (NULL);
2305                         }
2306                         stcb = sctp_findassociation_special_addr(m,
2307                             offset, sh, &inp, netp, dst);
2308                         if (inp_p != NULL) {
2309                                 *inp_p = inp;
2310                         }
2311                 }
2312         }
2313         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2314         return (stcb);
2315 }
2316
2317 /*
2318  * lookup an association by an ASCONF lookup address.
2319  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2320  */
2321 struct sctp_tcb *
2322 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2323     struct sockaddr *dst, struct sctphdr *sh,
2324     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2325 {
2326         struct sctp_tcb *stcb;
2327         union sctp_sockstore remote_store;
2328         struct sctp_paramhdr parm_buf, *phdr;
2329         int ptype;
2330         int zero_address = 0;
2331
2332 #ifdef INET
2333         struct sockaddr_in *sin;
2334
2335 #endif
2336 #ifdef INET6
2337         struct sockaddr_in6 *sin6;
2338
2339 #endif
2340
2341         memset(&remote_store, 0, sizeof(remote_store));
2342         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2343             &parm_buf, sizeof(struct sctp_paramhdr));
2344         if (phdr == NULL) {
2345                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2346                     __func__);
2347                 return NULL;
2348         }
2349         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2350         /* get the correlation address */
2351         switch (ptype) {
2352 #ifdef INET6
2353         case SCTP_IPV6_ADDRESS:
2354                 {
2355                         /* ipv6 address param */
2356                         struct sctp_ipv6addr_param *p6, p6_buf;
2357
2358                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2359                                 return NULL;
2360                         }
2361                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2362                             offset + sizeof(struct sctp_asconf_chunk),
2363                             &p6_buf.ph, sizeof(*p6));
2364                         if (p6 == NULL) {
2365                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2366                                     __func__);
2367                                 return (NULL);
2368                         }
2369                         sin6 = &remote_store.sin6;
2370                         sin6->sin6_family = AF_INET6;
2371                         sin6->sin6_len = sizeof(*sin6);
2372                         sin6->sin6_port = sh->src_port;
2373                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2374                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2375                                 zero_address = 1;
2376                         break;
2377                 }
2378 #endif
2379 #ifdef INET
2380         case SCTP_IPV4_ADDRESS:
2381                 {
2382                         /* ipv4 address param */
2383                         struct sctp_ipv4addr_param *p4, p4_buf;
2384
2385                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2386                                 return NULL;
2387                         }
2388                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2389                             offset + sizeof(struct sctp_asconf_chunk),
2390                             &p4_buf.ph, sizeof(*p4));
2391                         if (p4 == NULL) {
2392                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2393                                     __func__);
2394                                 return (NULL);
2395                         }
2396                         sin = &remote_store.sin;
2397                         sin->sin_family = AF_INET;
2398                         sin->sin_len = sizeof(*sin);
2399                         sin->sin_port = sh->src_port;
2400                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2401                         if (sin->sin_addr.s_addr == INADDR_ANY)
2402                                 zero_address = 1;
2403                         break;
2404                 }
2405 #endif
2406         default:
2407                 /* invalid address param type */
2408                 return NULL;
2409         }
2410
2411         if (zero_address) {
2412                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2413                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2414                 if (stcb != NULL) {
2415                         SCTP_INP_DECR_REF(*inp_p);
2416                 }
2417         } else {
2418                 stcb = sctp_findassociation_ep_addr(inp_p,
2419                     &remote_store.sa, netp,
2420                     dst, NULL);
2421         }
2422         return (stcb);
2423 }
2424
2425
2426 /*
2427  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2428  * addresses. This way if we don't get a bind we by default pick a ephemeral
2429  * port with all addresses bound.
2430  */
2431 int
2432 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2433 {
2434         /*
2435          * we get called when a new endpoint starts up. We need to allocate
2436          * the sctp_inpcb structure from the zone and init it. Mark it as
2437          * unbound and find a port that we can use as an ephemeral with
2438          * INADDR_ANY. If the user binds later no problem we can then add in
2439          * the specific addresses. And setup the default parameters for the
2440          * EP.
2441          */
2442         int i, error;
2443         struct sctp_inpcb *inp;
2444         struct sctp_pcb *m;
2445         struct timeval time;
2446         sctp_sharedkey_t *null_key;
2447
2448         error = 0;
2449
2450         SCTP_INP_INFO_WLOCK();
2451         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2452         if (inp == NULL) {
2453                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2454                 SCTP_INP_INFO_WUNLOCK();
2455                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2456                 return (ENOBUFS);
2457         }
2458         /* zap it */
2459         bzero(inp, sizeof(*inp));
2460
2461         /* bump generations */
2462         /* setup socket pointers */
2463         inp->sctp_socket = so;
2464         inp->ip_inp.inp.inp_socket = so;
2465         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2466 #ifdef INET6
2467         if (INP_SOCKAF(so) == AF_INET6) {
2468                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2469                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2470                 }
2471                 if (MODULE_GLOBAL(ip6_v6only)) {
2472                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2473                 }
2474         }
2475 #endif
2476         inp->sctp_associd_counter = 1;
2477         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2478         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2479         inp->max_cwnd = 0;
2480         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2481         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2482         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2483         inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2484         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2485         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2486         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2487         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2488         inp->fibnum = so->so_fibnum;
2489         /* init the small hash table we use to track asocid <-> tcb */
2490         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2491         if (inp->sctp_asocidhash == NULL) {
2492                 crfree(inp->ip_inp.inp.inp_cred);
2493                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2494                 SCTP_INP_INFO_WUNLOCK();
2495                 return (ENOBUFS);
2496         }
2497 #ifdef IPSEC
2498         error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2499         if (error != 0) {
2500                 crfree(inp->ip_inp.inp.inp_cred);
2501                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2502                 SCTP_INP_INFO_WUNLOCK();
2503                 return error;
2504         }
2505 #endif                          /* IPSEC */
2506         SCTP_INCR_EP_COUNT();
2507         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2508         SCTP_INP_INFO_WUNLOCK();
2509
2510         so->so_pcb = (caddr_t)inp;
2511
2512         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2513                 /* UDP style socket */
2514                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2515                     SCTP_PCB_FLAGS_UNBOUND);
2516                 /* Be sure it is NON-BLOCKING IO for UDP */
2517                 /* SCTP_SET_SO_NBIO(so); */
2518         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2519                 /* TCP style socket */
2520                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2521                     SCTP_PCB_FLAGS_UNBOUND);
2522                 /* Be sure we have blocking IO by default */
2523                 SCTP_CLEAR_SO_NBIO(so);
2524         } else {
2525                 /*
2526                  * unsupported socket type (RAW, etc)- in case we missed it
2527                  * in protosw
2528                  */
2529                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2530                 so->so_pcb = NULL;
2531                 crfree(inp->ip_inp.inp.inp_cred);
2532 #ifdef IPSEC
2533                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2534 #endif
2535                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2536                 return (EOPNOTSUPP);
2537         }
2538         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2539                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2540                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2541         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2542                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2543                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2544         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2545                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2546                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2547         }
2548         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2549             &inp->sctp_hashmark);
2550         if (inp->sctp_tcbhash == NULL) {
2551                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2552                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2553                 so->so_pcb = NULL;
2554                 crfree(inp->ip_inp.inp.inp_cred);
2555 #ifdef IPSEC
2556                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2557 #endif
2558                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2559                 return (ENOBUFS);
2560         }
2561         inp->def_vrf_id = vrf_id;
2562
2563         SCTP_INP_INFO_WLOCK();
2564         SCTP_INP_LOCK_INIT(inp);
2565         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2566         SCTP_INP_READ_INIT(inp);
2567         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2568         /* lock the new ep */
2569         SCTP_INP_WLOCK(inp);
2570
2571         /* add it to the info area */
2572         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2573         SCTP_INP_INFO_WUNLOCK();
2574
2575         TAILQ_INIT(&inp->read_queue);
2576         LIST_INIT(&inp->sctp_addr_list);
2577
2578         LIST_INIT(&inp->sctp_asoc_list);
2579
2580 #ifdef SCTP_TRACK_FREED_ASOCS
2581         /* TEMP CODE */
2582         LIST_INIT(&inp->sctp_asoc_free_list);
2583 #endif
2584         /* Init the timer structure for signature change */
2585         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2586         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2587
2588         /* now init the actual endpoint default data */
2589         m = &inp->sctp_ep;
2590
2591         /* setup the base timeout information */
2592         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2593         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2594         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2595         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2596         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2597         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2598         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2599         /* all max/min max are in ms */
2600         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2601         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2602         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2603         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2604         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2605         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2606         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2607         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2608         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2609         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2610         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2611         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2612         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2613
2614         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2615         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2616         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2617         /* number of streams to pre-open on a association */
2618         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2619
2620         /* Add adaptation cookie */
2621         m->adaptation_layer_indicator = 0;
2622         m->adaptation_layer_indicator_provided = 0;
2623
2624         /* seed random number generator */
2625         m->random_counter = 1;
2626         m->store_at = SCTP_SIGNATURE_SIZE;
2627         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2628         sctp_fill_random_store(m);
2629
2630         /* Minimum cookie size */
2631         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2632             sizeof(struct sctp_state_cookie);
2633         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2634
2635         /* Setup the initial secret */
2636         (void)SCTP_GETTIME_TIMEVAL(&time);
2637         m->time_of_secret_change = time.tv_sec;
2638
2639         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2640                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2641         }
2642         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2643
2644         /* How long is a cookie good for ? */
2645         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2646         /*
2647          * Initialize authentication parameters
2648          */
2649         m->local_hmacs = sctp_default_supported_hmaclist();
2650         m->local_auth_chunks = sctp_alloc_chunklist();
2651         if (inp->asconf_supported) {
2652                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2653                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2654         }
2655         m->default_dscp = 0;
2656 #ifdef INET6
2657         m->default_flowlabel = 0;
2658 #endif
2659         m->port = 0;            /* encapsulation disabled by default */
2660         LIST_INIT(&m->shared_keys);
2661         /* add default NULL key as key id 0 */
2662         null_key = sctp_alloc_sharedkey();
2663         sctp_insert_sharedkey(&m->shared_keys, null_key);
2664         SCTP_INP_WUNLOCK(inp);
2665 #ifdef SCTP_LOG_CLOSING
2666         sctp_log_closing(inp, NULL, 12);
2667 #endif
2668         return (error);
2669 }
2670
2671
2672 void
2673 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2674     struct sctp_tcb *stcb)
2675 {
2676         struct sctp_nets *net;
2677         uint16_t lport, rport;
2678         struct sctppcbhead *head;
2679         struct sctp_laddr *laddr, *oladdr;
2680
2681         atomic_add_int(&stcb->asoc.refcnt, 1);
2682         SCTP_TCB_UNLOCK(stcb);
2683         SCTP_INP_INFO_WLOCK();
2684         SCTP_INP_WLOCK(old_inp);
2685         SCTP_INP_WLOCK(new_inp);
2686         SCTP_TCB_LOCK(stcb);
2687         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2688
2689         new_inp->sctp_ep.time_of_secret_change =
2690             old_inp->sctp_ep.time_of_secret_change;
2691         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2692             sizeof(old_inp->sctp_ep.secret_key));
2693         new_inp->sctp_ep.current_secret_number =
2694             old_inp->sctp_ep.current_secret_number;
2695         new_inp->sctp_ep.last_secret_number =
2696             old_inp->sctp_ep.last_secret_number;
2697         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2698
2699         /* make it so new data pours into the new socket */
2700         stcb->sctp_socket = new_inp->sctp_socket;
2701         stcb->sctp_ep = new_inp;
2702
2703         /* Copy the port across */
2704         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2705         rport = stcb->rport;
2706         /* Pull the tcb from the old association */
2707         LIST_REMOVE(stcb, sctp_tcbhash);
2708         LIST_REMOVE(stcb, sctp_tcblist);
2709         if (stcb->asoc.in_asocid_hash) {
2710                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2711         }
2712         /* Now insert the new_inp into the TCP connected hash */
2713         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2714
2715         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2716         /* Its safe to access */
2717         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2718
2719         /* Now move the tcb into the endpoint list */
2720         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2721         /*
2722          * Question, do we even need to worry about the ep-hash since we
2723          * only have one connection? Probably not :> so lets get rid of it
2724          * and not suck up any kernel memory in that.
2725          */
2726         if (stcb->asoc.in_asocid_hash) {
2727                 struct sctpasochead *lhd;
2728
2729                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2730                     new_inp->hashasocidmark)];
2731                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2732         }
2733         /* Ok. Let's restart timer. */
2734         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2735                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2736                     stcb, net);
2737         }
2738
2739         SCTP_INP_INFO_WUNLOCK();
2740         if (new_inp->sctp_tcbhash != NULL) {
2741                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2742                 new_inp->sctp_tcbhash = NULL;
2743         }
2744         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2745                 /* Subset bound, so copy in the laddr list from the old_inp */
2746                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2747                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2748                         if (laddr == NULL) {
2749                                 /*
2750                                  * Gak, what can we do? This assoc is really
2751                                  * HOSED. We probably should send an abort
2752                                  * here.
2753                                  */
2754                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2755                                 continue;
2756                         }
2757                         SCTP_INCR_LADDR_COUNT();
2758                         bzero(laddr, sizeof(*laddr));
2759                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2760                         laddr->ifa = oladdr->ifa;
2761                         atomic_add_int(&laddr->ifa->refcount, 1);
2762                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2763                             sctp_nxt_addr);
2764                         new_inp->laddr_count++;
2765                         if (oladdr == stcb->asoc.last_used_address) {
2766                                 stcb->asoc.last_used_address = laddr;
2767                         }
2768                 }
2769         }
2770         /*
2771          * Now any running timers need to be adjusted since we really don't
2772          * care if they are running or not just blast in the new_inp into
2773          * all of them.
2774          */
2775
2776         stcb->asoc.dack_timer.ep = (void *)new_inp;
2777         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2778         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2779         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2780         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2781         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2782         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2783         /* now what about the nets? */
2784         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2785                 net->pmtu_timer.ep = (void *)new_inp;
2786                 net->hb_timer.ep = (void *)new_inp;
2787                 net->rxt_timer.ep = (void *)new_inp;
2788         }
2789         SCTP_INP_WUNLOCK(new_inp);
2790         SCTP_INP_WUNLOCK(old_inp);
2791 }
2792
2793
2794
2795
2796 /* sctp_ifap is used to bypass normal local address validation checks */
2797 int
2798 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2799     struct sctp_ifa *sctp_ifap, struct thread *p)
2800 {
2801         /* bind a ep to a socket address */
2802         struct sctppcbhead *head;
2803         struct sctp_inpcb *inp, *inp_tmp;
2804         struct inpcb *ip_inp;
2805         int port_reuse_active = 0;
2806         int bindall;
2807         uint16_t lport;
2808         int error;
2809         uint32_t vrf_id;
2810
2811         lport = 0;
2812         bindall = 1;
2813         inp = (struct sctp_inpcb *)so->so_pcb;
2814         ip_inp = (struct inpcb *)so->so_pcb;
2815 #ifdef SCTP_DEBUG
2816         if (addr) {
2817                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2818                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2819                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2820                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2821         }
2822 #endif
2823         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2824                 /* already did a bind, subsequent binds NOT allowed ! */
2825                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2826                 return (EINVAL);
2827         }
2828 #ifdef INVARIANTS
2829         if (p == NULL)
2830                 panic("null proc/thread");
2831 #endif
2832         if (addr != NULL) {
2833                 switch (addr->sa_family) {
2834 #ifdef INET
2835                 case AF_INET:
2836                         {
2837                                 struct sockaddr_in *sin;
2838
2839                                 /* IPV6_V6ONLY socket? */
2840                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2841                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2842                                         return (EINVAL);
2843                                 }
2844                                 if (addr->sa_len != sizeof(*sin)) {
2845                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2846                                         return (EINVAL);
2847                                 }
2848                                 sin = (struct sockaddr_in *)addr;
2849                                 lport = sin->sin_port;
2850                                 /*
2851                                  * For LOOPBACK the prison_local_ip4() call
2852                                  * will transmute the ip address to the
2853                                  * proper value.
2854                                  */
2855                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2856                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2857                                         return (error);
2858                                 }
2859                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2860                                         bindall = 0;
2861                                 }
2862                                 break;
2863                         }
2864 #endif
2865 #ifdef INET6
2866                 case AF_INET6:
2867                         {
2868                                 /*
2869                                  * Only for pure IPv6 Address. (No IPv4
2870                                  * Mapped!)
2871                                  */
2872                                 struct sockaddr_in6 *sin6;
2873
2874                                 sin6 = (struct sockaddr_in6 *)addr;
2875
2876                                 if (addr->sa_len != sizeof(*sin6)) {
2877                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2878                                         return (EINVAL);
2879                                 }
2880                                 lport = sin6->sin6_port;
2881                                 /*
2882                                  * For LOOPBACK the prison_local_ip6() call
2883                                  * will transmute the ipv6 address to the
2884                                  * proper value.
2885                                  */
2886                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2887                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2888                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2889                                         return (error);
2890                                 }
2891                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2892                                         bindall = 0;
2893                                         /* KAME hack: embed scopeid */
2894                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2895                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2896                                                 return (EINVAL);
2897                                         }
2898                                 }
2899                                 /* this must be cleared for ifa_ifwithaddr() */
2900                                 sin6->sin6_scope_id = 0;
2901                                 break;
2902                         }
2903 #endif
2904                 default:
2905                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2906                         return (EAFNOSUPPORT);
2907                 }
2908         }
2909         SCTP_INP_INFO_WLOCK();
2910         SCTP_INP_WLOCK(inp);
2911         /* Setup a vrf_id to be the default for the non-bind-all case. */
2912         vrf_id = inp->def_vrf_id;
2913
2914         /* increase our count due to the unlock we do */
2915         SCTP_INP_INCR_REF(inp);
2916         if (lport) {
2917                 /*
2918                  * Did the caller specify a port? if so we must see if an ep
2919                  * already has this one bound.
2920                  */
2921                 /* got to be root to get at low ports */
2922                 if (ntohs(lport) < IPPORT_RESERVED) {
2923                         if (p && (error =
2924                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2925                             )) {
2926                                 SCTP_INP_DECR_REF(inp);
2927                                 SCTP_INP_WUNLOCK(inp);
2928                                 SCTP_INP_INFO_WUNLOCK();
2929                                 return (error);
2930                         }
2931                 }
2932                 SCTP_INP_WUNLOCK(inp);
2933                 if (bindall) {
2934                         vrf_id = inp->def_vrf_id;
2935                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2936                         if (inp_tmp != NULL) {
2937                                 /*
2938                                  * lock guy returned and lower count note
2939                                  * that we are not bound so inp_tmp should
2940                                  * NEVER be inp. And it is this inp
2941                                  * (inp_tmp) that gets the reference bump,
2942                                  * so we must lower it.
2943                                  */
2944                                 SCTP_INP_DECR_REF(inp_tmp);
2945                                 /* unlock info */
2946                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2947                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2948                                         /*
2949                                          * Ok, must be one-2-one and
2950                                          * allowing port re-use
2951                                          */
2952                                         port_reuse_active = 1;
2953                                         goto continue_anyway;
2954                                 }
2955                                 SCTP_INP_DECR_REF(inp);
2956                                 SCTP_INP_INFO_WUNLOCK();
2957                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2958                                 return (EADDRINUSE);
2959                         }
2960                 } else {
2961                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2962                         if (inp_tmp != NULL) {
2963                                 /*
2964                                  * lock guy returned and lower count note
2965                                  * that we are not bound so inp_tmp should
2966                                  * NEVER be inp. And it is this inp
2967                                  * (inp_tmp) that gets the reference bump,
2968                                  * so we must lower it.
2969                                  */
2970                                 SCTP_INP_DECR_REF(inp_tmp);
2971                                 /* unlock info */
2972                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2973                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2974                                         /*
2975                                          * Ok, must be one-2-one and
2976                                          * allowing port re-use
2977                                          */
2978                                         port_reuse_active = 1;
2979                                         goto continue_anyway;
2980                                 }
2981                                 SCTP_INP_DECR_REF(inp);
2982                                 SCTP_INP_INFO_WUNLOCK();
2983                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2984                                 return (EADDRINUSE);
2985                         }
2986                 }
2987 continue_anyway:
2988                 SCTP_INP_WLOCK(inp);
2989                 if (bindall) {
2990                         /* verify that no lport is not used by a singleton */
2991                         if ((port_reuse_active == 0) &&
2992                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2993                                 /* Sorry someone already has this one bound */
2994                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2995                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2996                                         port_reuse_active = 1;
2997                                 } else {
2998                                         SCTP_INP_DECR_REF(inp);
2999                                         SCTP_INP_WUNLOCK(inp);
3000                                         SCTP_INP_INFO_WUNLOCK();
3001                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3002                                         return (EADDRINUSE);
3003                                 }
3004                         }
3005                 }
3006         } else {
3007                 uint16_t first, last, candidate;
3008                 uint16_t count;
3009                 int done;
3010
3011                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3012                         first = MODULE_GLOBAL(ipport_hifirstauto);
3013                         last = MODULE_GLOBAL(ipport_hilastauto);
3014                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3015                         if (p && (error =
3016                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3017                             )) {
3018                                 SCTP_INP_DECR_REF(inp);
3019                                 SCTP_INP_WUNLOCK(inp);
3020                                 SCTP_INP_INFO_WUNLOCK();
3021                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3022                                 return (error);
3023                         }
3024                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3025                         last = MODULE_GLOBAL(ipport_lowlastauto);
3026                 } else {
3027                         first = MODULE_GLOBAL(ipport_firstauto);
3028                         last = MODULE_GLOBAL(ipport_lastauto);
3029                 }
3030                 if (first > last) {
3031                         uint16_t temp;
3032
3033                         temp = first;
3034                         first = last;
3035                         last = temp;
3036                 }
3037                 count = last - first + 1;       /* number of candidates */
3038                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3039
3040                 done = 0;
3041                 while (!done) {
3042                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3043                                 done = 1;
3044                         }
3045                         if (!done) {
3046                                 if (--count == 0) {
3047                                         SCTP_INP_DECR_REF(inp);
3048                                         SCTP_INP_WUNLOCK(inp);
3049                                         SCTP_INP_INFO_WUNLOCK();
3050                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3051                                         return (EADDRINUSE);
3052                                 }
3053                                 if (candidate == last)
3054                                         candidate = first;
3055                                 else
3056                                         candidate = candidate + 1;
3057                         }
3058                 }
3059                 lport = htons(candidate);
3060         }
3061         SCTP_INP_DECR_REF(inp);
3062         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3063             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3064                 /*
3065                  * this really should not happen. The guy did a non-blocking
3066                  * bind and then did a close at the same time.
3067                  */
3068                 SCTP_INP_WUNLOCK(inp);
3069                 SCTP_INP_INFO_WUNLOCK();
3070                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3071                 return (EINVAL);
3072         }
3073         /* ok we look clear to give out this port, so lets setup the binding */
3074         if (bindall) {
3075                 /* binding to all addresses, so just set in the proper flags */
3076                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3077                 /* set the automatic addr changes from kernel flag */
3078                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3079                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3080                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3081                 } else {
3082                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3083                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3084                 }
3085                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3086                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3087                 } else {
3088                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3089                 }
3090                 /*
3091                  * set the automatic mobility_base from kernel flag (by
3092                  * micchie)
3093                  */
3094                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3095                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3096                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3097                 } else {
3098                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3099                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3100                 }
3101                 /*
3102                  * set the automatic mobility_fasthandoff from kernel flag
3103                  * (by micchie)
3104                  */
3105                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3107                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3108                 } else {
3109                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3110                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3111                 }
3112         } else {
3113                 /*
3114                  * bind specific, make sure flags is off and add a new
3115                  * address structure to the sctp_addr_list inside the ep
3116                  * structure.
3117                  *
3118                  * We will need to allocate one and insert it at the head. The
3119                  * socketopt call can just insert new addresses in there as
3120                  * well. It will also have to do the embed scope kame hack
3121                  * too (before adding).
3122                  */
3123                 struct sctp_ifa *ifa;
3124                 union sctp_sockstore store;
3125
3126                 memset(&store, 0, sizeof(store));
3127                 switch (addr->sa_family) {
3128 #ifdef INET
3129                 case AF_INET:
3130                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3131                         store.sin.sin_port = 0;
3132                         break;
3133 #endif
3134 #ifdef INET6
3135                 case AF_INET6:
3136                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3137                         store.sin6.sin6_port = 0;
3138                         break;
3139 #endif
3140                 default:
3141                         break;
3142                 }
3143                 /*
3144                  * first find the interface with the bound address need to
3145                  * zero out the port to find the address! yuck! can't do
3146                  * this earlier since need port for sctp_pcb_findep()
3147                  */
3148                 if (sctp_ifap != NULL) {
3149                         ifa = sctp_ifap;
3150                 } else {
3151                         /*
3152                          * Note for BSD we hit here always other O/S's will
3153                          * pass things in via the sctp_ifap argument
3154                          * (Panda).
3155                          */
3156                         ifa = sctp_find_ifa_by_addr(&store.sa,
3157                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3158                 }
3159                 if (ifa == NULL) {
3160                         /* Can't find an interface with that address */
3161                         SCTP_INP_WUNLOCK(inp);
3162                         SCTP_INP_INFO_WUNLOCK();
3163                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3164                         return (EADDRNOTAVAIL);
3165                 }
3166 #ifdef INET6
3167                 if (addr->sa_family == AF_INET6) {
3168                         /* GAK, more FIXME IFA lock? */
3169                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3170                                 /* Can't bind a non-existent addr. */
3171                                 SCTP_INP_WUNLOCK(inp);
3172                                 SCTP_INP_INFO_WUNLOCK();
3173                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3174                                 return (EINVAL);
3175                         }
3176                 }
3177 #endif
3178                 /* we're not bound all */
3179                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3180                 /* allow bindx() to send ASCONF's for binding changes */
3181                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3182                 /* clear automatic addr changes from kernel flag */
3183                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3184
3185                 /* add this address to the endpoint list */
3186                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3187                 if (error != 0) {
3188                         SCTP_INP_WUNLOCK(inp);
3189                         SCTP_INP_INFO_WUNLOCK();
3190                         return (error);
3191                 }
3192                 inp->laddr_count++;
3193         }
3194         /* find the bucket */
3195         if (port_reuse_active) {
3196                 /* Put it into tcp 1-2-1 hash */
3197                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3198                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3199         } else {
3200                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3201         }
3202         /* put it in the bucket */
3203         LIST_INSERT_HEAD(head, inp, sctp_hash);
3204         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3205             (void *)head, ntohs(lport), port_reuse_active);
3206         /* set in the port */
3207         inp->sctp_lport = lport;
3208
3209         /* turn off just the unbound flag */
3210         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3211         SCTP_INP_WUNLOCK(inp);
3212         SCTP_INP_INFO_WUNLOCK();
3213         return (0);
3214 }
3215
3216
3217 static void
3218 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3219 {
3220         struct sctp_iterator *it, *nit;
3221
3222         /*
3223          * We enter with the only the ITERATOR_LOCK in place and a write
3224          * lock on the inp_info stuff.
3225          */
3226         it = sctp_it_ctl.cur_it;
3227         if (it && (it->vn != curvnet)) {
3228                 /* Its not looking at our VNET */
3229                 return;
3230         }
3231         if (it && (it->inp == inp)) {
3232                 /*
3233                  * This is tricky and we hold the iterator lock, but when it
3234                  * returns and gets the lock (when we release it) the
3235                  * iterator will try to operate on inp. We need to stop that
3236                  * from happening. But of course the iterator has a
3237                  * reference on the stcb and inp. We can mark it and it will
3238                  * stop.
3239                  *
3240                  * If its a single iterator situation, we set the end iterator
3241                  * flag. Otherwise we set the iterator to go to the next
3242                  * inp.
3243                  *
3244                  */
3245                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3246                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3247                 } else {
3248                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3249                 }
3250         }
3251         /*
3252          * Now go through and remove any single reference to our inp that
3253          * may be still pending on the list
3254          */
3255         SCTP_IPI_ITERATOR_WQ_LOCK();
3256         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3257                 if (it->vn != curvnet) {
3258                         continue;
3259                 }
3260                 if (it->inp == inp) {
3261                         /* This one points to me is it inp specific? */
3262                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3263                                 /* Remove and free this one */
3264                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3265                                     it, sctp_nxt_itr);
3266                                 if (it->function_atend != NULL) {
3267                                         (*it->function_atend) (it->pointer, it->val);
3268                                 }
3269                                 SCTP_FREE(it, SCTP_M_ITER);
3270                         } else {
3271                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3272                                 if (it->inp) {
3273                                         SCTP_INP_INCR_REF(it->inp);
3274                                 }
3275                         }
3276                         /*
3277                          * When its put in the refcnt is incremented so decr
3278                          * it
3279                          */
3280                         SCTP_INP_DECR_REF(inp);
3281                 }
3282         }
3283         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3284 }
3285
3286 /* release sctp_inpcb unbind the port */
3287 void
3288 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3289 {
3290         /*
3291          * Here we free a endpoint. We must find it (if it is in the Hash
3292          * table) and remove it from there. Then we must also find it in the
3293          * overall list and remove it from there. After all removals are
3294          * complete then any timer has to be stopped. Then start the actual
3295          * freeing. a) Any local lists. b) Any associations. c) The hash of
3296          * all associations. d) finally the ep itself.
3297          */
3298         struct sctp_tcb *asoc, *nasoc;
3299         struct sctp_laddr *laddr, *nladdr;
3300         struct inpcb *ip_pcb;
3301         struct socket *so;
3302         int being_refed = 0;
3303         struct sctp_queued_to_read *sq, *nsq;
3304         int cnt;
3305         sctp_sharedkey_t *shared_key, *nshared_key;
3306
3307
3308 #ifdef SCTP_LOG_CLOSING
3309         sctp_log_closing(inp, NULL, 0);
3310 #endif
3311         SCTP_ITERATOR_LOCK();
3312         /* mark any iterators on the list or being processed */
3313         sctp_iterator_inp_being_freed(inp);
3314         SCTP_ITERATOR_UNLOCK();
3315         so = inp->sctp_socket;
3316         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3317                 /* been here before.. eeks.. get out of here */
3318                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3319 #ifdef SCTP_LOG_CLOSING
3320                 sctp_log_closing(inp, NULL, 1);
3321 #endif
3322                 return;
3323         }
3324         SCTP_ASOC_CREATE_LOCK(inp);
3325         SCTP_INP_INFO_WLOCK();
3326
3327         SCTP_INP_WLOCK(inp);
3328         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3329                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3330                 /* socket is gone, so no more wakeups allowed */
3331                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3332                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3333                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3334
3335         }
3336         /* First time through we have the socket lock, after that no more. */
3337         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3338             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3339
3340         if (inp->control) {
3341                 sctp_m_freem(inp->control);
3342                 inp->control = NULL;
3343         }
3344         if (inp->pkt) {
3345                 sctp_m_freem(inp->pkt);
3346                 inp->pkt = NULL;
3347         }
3348         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3349                                          * here but I will be nice :> (i.e.
3350                                          * ip_pcb = ep;) */
3351         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3352                 int cnt_in_sd;
3353
3354                 cnt_in_sd = 0;
3355                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3356                         SCTP_TCB_LOCK(asoc);
3357                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3358                                 /* Skip guys being freed */
3359                                 cnt_in_sd++;
3360                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3361                                         /*
3362                                          * Special case - we did not start a
3363                                          * kill timer on the asoc due to it
3364                                          * was not closed. So go ahead and
3365                                          * start it now.
3366                                          */
3367                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3368                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3369                                 }
3370                                 SCTP_TCB_UNLOCK(asoc);
3371                                 continue;
3372                         }
3373                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3374                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3375                             (asoc->asoc.total_output_queue_size == 0)) {
3376                                 /*
3377                                  * If we have data in queue, we don't want
3378                                  * to just free since the app may have done,
3379                                  * send()/close or connect/send/close. And
3380                                  * it wants the data to get across first.
3381                                  */
3382                                 /* Just abandon things in the front states */
3383                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3384                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3385                                         cnt_in_sd++;
3386                                 }
3387                                 continue;
3388                         }
3389                         /* Disconnect the socket please */
3390                         asoc->sctp_socket = NULL;
3391                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3392                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3393                             (asoc->asoc.control_pdapi) ||
3394                             (asoc->asoc.size_on_all_streams > 0) ||
3395                             (so && (so->so_rcv.sb_cc > 0))) {
3396                                 /* Left with Data unread */
3397                                 struct mbuf *op_err;
3398
3399                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3400                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3401                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3402                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3403                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3404                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3405                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3406                                 }
3407                                 if (sctp_free_assoc(inp, asoc,
3408                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3409                                         cnt_in_sd++;
3410                                 }
3411                                 continue;
3412                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3413                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3414                             (asoc->asoc.stream_queue_cnt == 0)) {
3415                                 if (asoc->asoc.locked_on_sending) {
3416                                         goto abort_anyway;
3417                                 }
3418                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3419                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3420                                         struct sctp_nets *netp;
3421
3422                                         /*
3423                                          * there is nothing queued to send,
3424                                          * so I send shutdown
3425                                          */
3426                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3427                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3428                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3429                                         }
3430                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3431                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3432                                         sctp_stop_timers_for_shutdown(asoc);
3433                                         if (asoc->asoc.alternate) {
3434                                                 netp = asoc->asoc.alternate;
3435                                         } else {
3436                                                 netp = asoc->asoc.primary_destination;
3437                                         }
3438                                         sctp_send_shutdown(asoc, netp);
3439                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3440                                             netp);
3441                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3442                                             asoc->asoc.primary_destination);
3443                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3444                                 }
3445                         } else {
3446                                 /* mark into shutdown pending */
3447                                 struct sctp_stream_queue_pending *sp;
3448
3449                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3450                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3451                                     asoc->asoc.primary_destination);
3452                                 if (asoc->asoc.locked_on_sending) {
3453                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3454                                             sctp_streamhead);
3455                                         if (sp == NULL) {
3456                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3457                                                     (void *)asoc->asoc.locked_on_sending,
3458                                                     asoc->asoc.locked_on_sending->stream_no);
3459                                         } else {
3460                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3461                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3462                                         }
3463                                 }
3464                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3465                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3466                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3467                                         struct mbuf *op_err;
3468
3469                         abort_anyway:
3470                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3471                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3472                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3473                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3474                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3475                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3476                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3477                                         }
3478                                         if (sctp_free_assoc(inp, asoc,
3479                                             SCTP_PCBFREE_NOFORCE,
3480                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3481                                                 cnt_in_sd++;
3482                                         }
3483                                         continue;
3484                                 } else {
3485                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3486                                 }
3487                         }
3488                         cnt_in_sd++;
3489                         SCTP_TCB_UNLOCK(asoc);
3490                 }
3491                 /* now is there some left in our SHUTDOWN state? */
3492                 if (cnt_in_sd) {
3493 #ifdef SCTP_LOG_CLOSING
3494                         sctp_log_closing(inp, NULL, 2);
3495 #endif
3496                         inp->sctp_socket = NULL;
3497                         SCTP_INP_WUNLOCK(inp);
3498                         SCTP_ASOC_CREATE_UNLOCK(inp);
3499                         SCTP_INP_INFO_WUNLOCK();
3500                         return;
3501                 }
3502         }
3503         inp->sctp_socket = NULL;
3504         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3505             SCTP_PCB_FLAGS_UNBOUND) {
3506                 /*
3507                  * ok, this guy has been bound. It's port is somewhere in
3508                  * the SCTP_BASE_INFO(hash table). Remove it!
3509                  */
3510                 LIST_REMOVE(inp, sctp_hash);
3511                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3512         }
3513         /*
3514          * If there is a timer running to kill us, forget it, since it may
3515          * have a contest on the INP lock.. which would cause us to die ...
3516          */
3517         cnt = 0;
3518         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3519                 SCTP_TCB_LOCK(asoc);
3520                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3521                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3522                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3523                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3524                         }
3525                         cnt++;
3526                         SCTP_TCB_UNLOCK(asoc);
3527                         continue;
3528                 }
3529                 /* Free associations that are NOT killing us */
3530                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3531                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3532                         struct mbuf *op_err;
3533
3534                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3535                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3536                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3537                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3538                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3539                         cnt++;
3540                         SCTP_TCB_UNLOCK(asoc);
3541                         continue;
3542                 }
3543                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3544                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3545                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3546                 }
3547                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3548                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3549                         cnt++;
3550                 }
3551         }
3552         if (cnt) {
3553                 /* Ok we have someone out there that will kill us */
3554                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3555 #ifdef SCTP_LOG_CLOSING
3556                 sctp_log_closing(inp, NULL, 3);
3557 #endif
3558                 SCTP_INP_WUNLOCK(inp);
3559                 SCTP_ASOC_CREATE_UNLOCK(inp);
3560                 SCTP_INP_INFO_WUNLOCK();
3561                 return;
3562         }
3563         if (SCTP_INP_LOCK_CONTENDED(inp))
3564                 being_refed++;
3565         if (SCTP_INP_READ_CONTENDED(inp))
3566                 being_refed++;
3567         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3568                 being_refed++;
3569
3570         if ((inp->refcount) ||
3571             (being_refed) ||
3572             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3573                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3574 #ifdef SCTP_LOG_CLOSING
3575                 sctp_log_closing(inp, NULL, 4);
3576 #endif
3577                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3578                 SCTP_INP_WUNLOCK(inp);
3579                 SCTP_ASOC_CREATE_UNLOCK(inp);
3580                 SCTP_INP_INFO_WUNLOCK();
3581                 return;
3582         }
3583         inp->sctp_ep.signature_change.type = 0;
3584         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3585         /*
3586          * Remove it from the list .. last thing we need a lock for.
3587          */
3588         LIST_REMOVE(inp, sctp_list);
3589         SCTP_INP_WUNLOCK(inp);
3590         SCTP_ASOC_CREATE_UNLOCK(inp);
3591         SCTP_INP_INFO_WUNLOCK();
3592         /*
3593          * Now we release all locks. Since this INP cannot be found anymore
3594          * except possibly by the kill timer that might be running. We call
3595          * the drain function here. It should hit the case were it sees the
3596          * ACTIVE flag cleared and exit out freeing us to proceed and
3597          * destroy everything.
3598          */
3599         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3600                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3601         } else {
3602                 /* Probably un-needed */
3603                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3604         }
3605
3606 #ifdef SCTP_LOG_CLOSING
3607         sctp_log_closing(inp, NULL, 5);
3608 #endif
3609
3610
3611         if ((inp->sctp_asocidhash) != NULL) {
3612                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3613                 inp->sctp_asocidhash = NULL;
3614         }
3615         /* sa_ignore FREED_MEMORY */
3616         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3617                 /* Its only abandoned if it had data left */
3618                 if (sq->length)
3619                         SCTP_STAT_INCR(sctps_left_abandon);
3620
3621                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3622                 sctp_free_remote_addr(sq->whoFrom);
3623                 if (so)
3624                         so->so_rcv.sb_cc -= sq->length;
3625                 if (sq->data) {
3626                         sctp_m_freem(sq->data);
3627                         sq->data = NULL;
3628                 }
3629                 /*
3630                  * no need to free the net count, since at this point all
3631                  * assoc's are gone.
3632                  */
3633                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3634                 SCTP_DECR_READQ_COUNT();
3635         }
3636         /* Now the sctp_pcb things */
3637         /*
3638          * free each asoc if it is not already closed/free. we can't use the
3639          * macro here since le_next will get freed as part of the
3640          * sctp_free_assoc() call.
3641          */
3642 #ifdef IPSEC
3643         ipsec_delete_pcbpolicy(ip_pcb);
3644 #endif
3645         if (ip_pcb->inp_options) {
3646                 (void)sctp_m_free(ip_pcb->inp_options);
3647                 ip_pcb->inp_options = 0;
3648         }
3649 #ifdef INET6
3650         if (ip_pcb->inp_vflag & INP_IPV6) {
3651                 struct in6pcb *in6p;
3652
3653                 in6p = (struct in6pcb *)inp;
3654                 ip6_freepcbopts(in6p->in6p_outputopts);
3655         }
3656 #endif                          /* INET6 */
3657         ip_pcb->inp_vflag = 0;
3658         /* free up authentication fields */
3659         if (inp->sctp_ep.local_auth_chunks != NULL)
3660                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3661         if (inp->sctp_ep.local_hmacs != NULL)
3662                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3663
3664         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3665                 LIST_REMOVE(shared_key, next);
3666                 sctp_free_sharedkey(shared_key);
3667                 /* sa_ignore FREED_MEMORY */
3668         }
3669
3670         /*
3671          * if we have an address list the following will free the list of
3672          * ifaddr's that are set into this ep. Again macro limitations here,
3673          * since the LIST_FOREACH could be a bad idea.
3674          */
3675         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3676                 sctp_remove_laddr(laddr);
3677         }
3678
3679 #ifdef SCTP_TRACK_FREED_ASOCS
3680         /* TEMP CODE */
3681         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3682                 LIST_REMOVE(asoc, sctp_tcblist);
3683                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3684                 SCTP_DECR_ASOC_COUNT();
3685         }
3686         /* *** END TEMP CODE *** */
3687 #endif
3688         /* Now lets see about freeing the EP hash table. */
3689         if (inp->sctp_tcbhash != NULL) {
3690                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3691                 inp->sctp_tcbhash = NULL;
3692         }
3693         /* Now we must put the ep memory back into the zone pool */
3694         crfree(inp->ip_inp.inp.inp_cred);
3695         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3696         SCTP_INP_LOCK_DESTROY(inp);
3697         SCTP_INP_READ_DESTROY(inp);
3698         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3699         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3700         SCTP_DECR_EP_COUNT();
3701 }
3702
3703
3704 struct sctp_nets *
3705 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3706 {
3707         struct sctp_nets *net;
3708
3709         /* locate the address */
3710         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3711                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3712                         return (net);
3713         }
3714         return (NULL);
3715 }
3716
3717
3718 int
3719 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3720 {
3721         struct sctp_ifa *sctp_ifa;
3722
3723         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3724         if (sctp_ifa) {
3725                 return (1);
3726         } else {
3727                 return (0);
3728         }
3729 }
3730
3731 /*
3732  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3733  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3734  * stats of stuff.
3735  */
3736 int
3737 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3738     struct sctp_nets **netp, int set_scope, int from)
3739 {
3740         /*
3741          * The following is redundant to the same lines in the
3742          * sctp_aloc_assoc() but is needed since others call the add address
3743          * function
3744          */
3745         struct sctp_nets *net, *netfirst;
3746         int addr_inscope;
3747
3748         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3749             from);
3750         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3751
3752         netfirst = sctp_findnet(stcb, newaddr);
3753         if (netfirst) {
3754                 /*
3755                  * Lie and return ok, we don't want to make the association
3756                  * go away for this behavior. It will happen in the TCP
3757                  * model in a connected socket. It does not reach the hash
3758                  * table until after the association is built so it can't be
3759                  * found. Mark as reachable, since the initial creation will
3760                  * have been cleared and the NOT_IN_ASSOC flag will have
3761                  * been added... and we don't want to end up removing it
3762                  * back out.
3763                  */
3764                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3765                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3766                             SCTP_ADDR_UNCONFIRMED);
3767                 } else {
3768                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3769                 }
3770
3771                 return (0);
3772         }
3773         addr_inscope = 1;
3774         switch (newaddr->sa_family) {
3775 #ifdef INET
3776         case AF_INET:
3777                 {
3778                         struct sockaddr_in *sin;
3779
3780                         sin = (struct sockaddr_in *)newaddr;
3781                         if (sin->sin_addr.s_addr == 0) {
3782                                 /* Invalid address */
3783                                 return (-1);
3784                         }
3785                         /* zero out the bzero area */
3786                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3787
3788                         /* assure len is set */
3789                         sin->sin_len = sizeof(struct sockaddr_in);
3790                         if (set_scope) {
3791                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3792                                         stcb->asoc.scope.ipv4_local_scope = 1;
3793                                 }
3794                         } else {
3795                                 /* Validate the address is in scope */
3796                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3797                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3798                                         addr_inscope = 0;
3799                                 }
3800                         }
3801                         break;
3802                 }
3803 #endif
3804 #ifdef INET6
3805         case AF_INET6:
3806                 {
3807                         struct sockaddr_in6 *sin6;
3808
3809                         sin6 = (struct sockaddr_in6 *)newaddr;
3810                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3811                                 /* Invalid address */
3812                                 return (-1);
3813                         }
3814                         /* assure len is set */
3815                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3816                         if (set_scope) {
3817                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3818                                         stcb->asoc.scope.loopback_scope = 1;
3819                                         stcb->asoc.scope.local_scope = 0;
3820                                         stcb->asoc.scope.ipv4_local_scope = 1;
3821                                         stcb->asoc.scope.site_scope = 1;
3822                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3823                                         /*
3824                                          * If the new destination is a
3825                                          * LINK_LOCAL we must have common
3826                                          * site scope. Don't set the local
3827                                          * scope since we may not share all
3828                                          * links, only loopback can do this.
3829                                          * Links on the local network would
3830                                          * also be on our private network
3831                                          * for v4 too.
3832                                          */
3833                                         stcb->asoc.scope.ipv4_local_scope = 1;
3834                                         stcb->asoc.scope.site_scope = 1;
3835                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3836                                         /*
3837                                          * If the new destination is
3838                                          * SITE_LOCAL then we must have site
3839                                          * scope in common.
3840                                          */
3841                                         stcb->asoc.scope.site_scope = 1;
3842                                 }
3843                         } else {
3844                                 /* Validate the address is in scope */
3845                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3846                                     (stcb->asoc.scope.loopback_scope == 0)) {
3847                                         addr_inscope = 0;
3848                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3849                                     (stcb->asoc.scope.local_scope == 0)) {
3850                                         addr_inscope = 0;
3851                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3852                                     (stcb->asoc.scope.site_scope == 0)) {
3853                                         addr_inscope = 0;
3854                                 }
3855                         }
3856                         break;
3857                 }
3858 #endif
3859         default:
3860                 /* not supported family type */
3861                 return (-1);
3862         }
3863         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3864         if (net == NULL) {
3865                 return (-1);
3866         }
3867         SCTP_INCR_RADDR_COUNT();
3868         bzero(net, sizeof(struct sctp_nets));
3869         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3870         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3871         switch (newaddr->sa_family) {
3872 #ifdef INET
3873         case AF_INET:
3874                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3875                 break;
3876 #endif
3877 #ifdef INET6
3878         case AF_INET6:
3879                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3880                 break;
3881 #endif
3882         default:
3883                 break;
3884         }
3885         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3886         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3887                 stcb->asoc.scope.loopback_scope = 1;
3888                 stcb->asoc.scope.ipv4_local_scope = 1;
3889                 stcb->asoc.scope.local_scope = 0;
3890                 stcb->asoc.scope.site_scope = 1;
3891                 addr_inscope = 1;
3892         }
3893         net->failure_threshold = stcb->asoc.def_net_failure;
3894         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3895         if (addr_inscope == 0) {
3896                 net->dest_state = (SCTP_ADDR_REACHABLE |
3897                     SCTP_ADDR_OUT_OF_SCOPE);
3898         } else {
3899                 if (from == SCTP_ADDR_IS_CONFIRMED)
3900                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3901                         net->dest_state = SCTP_ADDR_REACHABLE;
3902                 else
3903                         net->dest_state = SCTP_ADDR_REACHABLE |
3904                             SCTP_ADDR_UNCONFIRMED;
3905         }
3906         /*
3907          * We set this to 0, the timer code knows that this means its an
3908          * initial value
3909          */
3910         net->rto_needed = 1;
3911         net->RTO = 0;
3912         net->RTO_measured = 0;
3913         stcb->asoc.numnets++;
3914         net->ref_count = 1;
3915         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3916         net->port = stcb->asoc.port;
3917         net->dscp = stcb->asoc.default_dscp;
3918 #ifdef INET6
3919         net->flowlabel = stcb->asoc.default_flowlabel;
3920 #endif
3921         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3922                 net->dest_state |= SCTP_ADDR_NOHB;
3923         } else {
3924                 net->dest_state &= ~SCTP_ADDR_NOHB;
3925         }
3926         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3927                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3928         } else {
3929                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3930         }
3931         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3932         /* Init the timer structure */
3933         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3934         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3935         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3936
3937         /* Now generate a route for this guy */
3938 #ifdef INET6
3939         /* KAME hack: embed scopeid */
3940         if (newaddr->sa_family == AF_INET6) {
3941                 struct sockaddr_in6 *sin6;
3942
3943                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3944                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3945                 sin6->sin6_scope_id = 0;
3946         }
3947 #endif
3948         SCTP_RTALLOC((sctp_route_t *) & net->ro,
3949             stcb->asoc.vrf_id,
3950             stcb->sctp_ep->fibnum);
3951
3952         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3953                 /* Get source address */
3954                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3955                     stcb,
3956                     (sctp_route_t *) & net->ro,
3957                     net,
3958                     0,
3959                     stcb->asoc.vrf_id);
3960                 if (net->ro._s_addr != NULL) {
3961                         net->src_addr_selected = 1;
3962                         /* Now get the interface MTU */
3963                         if (net->ro._s_addr->ifn_p != NULL) {
3964                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3965                         }
3966                 } else {
3967                         net->src_addr_selected = 0;
3968                 }
3969                 if (net->mtu > 0) {
3970                         uint32_t rmtu;
3971
3972                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3973                         if (rmtu == 0) {
3974                                 /*
3975                                  * Start things off to match mtu of
3976                                  * interface please.
3977                                  */
3978                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3979                                     net->ro.ro_rt, net->mtu);
3980                         } else {
3981                                 /*
3982                                  * we take the route mtu over the interface,
3983                                  * since the route may be leading out the
3984                                  * loopback, or a different interface.
3985                                  */
3986                                 net->mtu = rmtu;
3987                         }
3988                 }
3989         } else {
3990                 net->src_addr_selected = 0;
3991         }
3992         if (net->mtu == 0) {
3993                 switch (newaddr->sa_family) {
3994 #ifdef INET
3995                 case AF_INET:
3996                         net->mtu = SCTP_DEFAULT_MTU;
3997                         break;
3998 #endif
3999 #ifdef INET6
4000                 case AF_INET6:
4001                         net->mtu = 1280;
4002                         break;
4003 #endif
4004                 default:
4005                         break;
4006                 }
4007         }
4008 #if defined(INET) || defined(INET6)
4009         if (net->port) {
4010                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4011         }
4012 #endif
4013         if (from == SCTP_ALLOC_ASOC) {
4014                 stcb->asoc.smallest_mtu = net->mtu;
4015         }
4016         if (stcb->asoc.smallest_mtu > net->mtu) {
4017                 stcb->asoc.smallest_mtu = net->mtu;
4018         }
4019 #ifdef INET6
4020         if (newaddr->sa_family == AF_INET6) {
4021                 struct sockaddr_in6 *sin6;
4022
4023                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4024                 (void)sa6_recoverscope(sin6);
4025         }
4026 #endif
4027
4028         /* JRS - Use the congestion control given in the CC module */
4029         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4030                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4031
4032         /*
4033          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4034          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4035          */
4036         net->find_pseudo_cumack = 1;
4037         net->find_rtx_pseudo_cumack = 1;
4038         /* Choose an initial flowid. */
4039         net->flowid = stcb->asoc.my_vtag ^
4040             ntohs(stcb->rport) ^
4041             ntohs(stcb->sctp_ep->sctp_lport);
4042         net->flowtype = M_HASHTYPE_OPAQUE;
4043         if (netp) {
4044                 *netp = net;
4045         }
4046         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4047         if (net->ro.ro_rt == NULL) {
4048                 /* Since we have no route put it at the back */
4049                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4050         } else if (netfirst == NULL) {
4051                 /* We are the first one in the pool. */
4052                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4053         } else if (netfirst->ro.ro_rt == NULL) {
4054                 /*
4055                  * First one has NO route. Place this one ahead of the first
4056                  * one.
4057                  */
4058                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4059         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4060                 /*
4061                  * This one has a different interface than the one at the
4062                  * top of the list. Place it ahead.
4063                  */
4064                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4065         } else {
4066                 /*
4067                  * Ok we have the same interface as the first one. Move
4068                  * forward until we find either a) one with a NULL route...
4069                  * insert ahead of that b) one with a different ifp.. insert
4070                  * after that. c) end of the list.. insert at the tail.
4071                  */
4072                 struct sctp_nets *netlook;
4073
4074                 do {
4075                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4076                         if (netlook == NULL) {
4077                                 /* End of the list */
4078                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4079                                 break;
4080                         } else if (netlook->ro.ro_rt == NULL) {
4081                                 /* next one has NO route */
4082                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4083                                 break;
4084                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4085                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4086                                     net, sctp_next);
4087                                 break;
4088                         }
4089                         /* Shift forward */
4090                         netfirst = netlook;
4091                 } while (netlook != NULL);
4092         }
4093
4094         /* got to have a primary set */
4095         if (stcb->asoc.primary_destination == 0) {
4096                 stcb->asoc.primary_destination = net;
4097         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4098                     (net->ro.ro_rt) &&
4099             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4100                 /* No route to current primary adopt new primary */
4101                 stcb->asoc.primary_destination = net;
4102         }
4103         /* Validate primary is first */
4104         net = TAILQ_FIRST(&stcb->asoc.nets);
4105         if ((net != stcb->asoc.primary_destination) &&
4106             (stcb->asoc.primary_destination)) {
4107                 /*
4108                  * first one on the list is NOT the primary sctp_cmpaddr()
4109                  * is much more efficient if the primary is the first on the
4110                  * list, make it so.
4111                  */
4112                 TAILQ_REMOVE(&stcb->asoc.nets,
4113                     stcb->asoc.primary_destination, sctp_next);
4114                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4115                     stcb->asoc.primary_destination, sctp_next);
4116         }
4117         return (0);
4118 }
4119
4120
4121 static uint32_t
4122 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4123 {
4124         uint32_t id;
4125         struct sctpasochead *head;
4126         struct sctp_tcb *lstcb;
4127
4128         SCTP_INP_WLOCK(inp);
4129 try_again:
4130         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4131                 /* TSNH */
4132                 SCTP_INP_WUNLOCK(inp);
4133                 return (0);
4134         }
4135         /*
4136          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4137          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4138          */
4139         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4140                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4141         }
4142         id = inp->sctp_associd_counter;
4143         inp->sctp_associd_counter++;
4144         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4145         if (lstcb) {
4146                 goto try_again;
4147         }
4148         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4149         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4150         stcb->asoc.in_asocid_hash = 1;
4151         SCTP_INP_WUNLOCK(inp);
4152         return id;
4153 }
4154
4155 /*
4156  * allocate an association and add it to the endpoint. The caller must be
4157  * careful to add all additional addresses once they are know right away or
4158  * else the assoc will be may experience a blackout scenario.
4159  */
4160 struct sctp_tcb *
4161 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4162     int *error, uint32_t override_tag, uint32_t vrf_id,
4163     uint16_t o_streams,
4164     struct thread *p
4165 )
4166 {
4167         /* note the p argument is only valid in unbound sockets */
4168
4169         struct sctp_tcb *stcb;
4170         struct sctp_association *asoc;
4171         struct sctpasochead *head;
4172         uint16_t rport;
4173         int err;
4174
4175         /*
4176          * Assumption made here: Caller has done a
4177          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4178          * address does not exist already.
4179          */
4180         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4181                 /* Hit max assoc, sorry no more */
4182                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4183                 *error = ENOBUFS;
4184                 return (NULL);
4185         }
4186         if (firstaddr == NULL) {
4187                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4188                 *error = EINVAL;
4189                 return (NULL);
4190         }
4191         SCTP_INP_RLOCK(inp);
4192         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4193             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4194             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4195                 /*
4196                  * If its in the TCP pool, its NOT allowed to create an
4197                  * association. The parent listener needs to call
4198                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4199                  * off, or connected one does this.. its an error.
4200                  */
4201                 SCTP_INP_RUNLOCK(inp);
4202                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4203                 *error = EINVAL;
4204                 return (NULL);
4205         }
4206         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4207             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4208                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4209                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4210                         SCTP_INP_RUNLOCK(inp);
4211                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4212                         *error = EINVAL;
4213                         return (NULL);
4214                 }
4215         }
4216         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4217 #ifdef SCTP_DEBUG
4218         if (firstaddr) {
4219                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4220                 switch (firstaddr->sa_family) {
4221 #ifdef INET
4222                 case AF_INET:
4223                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4224                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4225                         break;
4226 #endif
4227 #ifdef INET6
4228                 case AF_INET6:
4229                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4230                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4231                         break;
4232 #endif
4233                 default:
4234                         break;
4235                 }
4236         } else {
4237                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4238         }
4239 #endif                          /* SCTP_DEBUG */
4240         switch (firstaddr->sa_family) {
4241 #ifdef INET
4242         case AF_INET:
4243                 {
4244                         struct sockaddr_in *sin;
4245
4246                         sin = (struct sockaddr_in *)firstaddr;
4247                         if ((ntohs(sin->sin_port) == 0) ||
4248                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4249                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4250                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4251                                 /* Invalid address */
4252                                 SCTP_INP_RUNLOCK(inp);
4253                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4254                                 *error = EINVAL;
4255                                 return (NULL);
4256                         }
4257                         rport = sin->sin_port;
4258                         break;
4259                 }
4260 #endif
4261 #ifdef INET6
4262         case AF_INET6:
4263                 {
4264                         struct sockaddr_in6 *sin6;
4265
4266                         sin6 = (struct sockaddr_in6 *)firstaddr;
4267                         if ((ntohs(sin6->sin6_port) == 0) ||
4268                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4269                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4270                                 /* Invalid address */
4271                                 SCTP_INP_RUNLOCK(inp);
4272                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4273                                 *error = EINVAL;
4274                                 return (NULL);
4275                         }
4276                         rport = sin6->sin6_port;
4277                         break;
4278                 }
4279 #endif
4280         default:
4281                 /* not supported family type */
4282                 SCTP_INP_RUNLOCK(inp);
4283                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4284                 *error = EINVAL;
4285                 return (NULL);
4286         }
4287         SCTP_INP_RUNLOCK(inp);
4288         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4289                 /*
4290                  * If you have not performed a bind, then we need to do the
4291                  * ephemeral bind for you.
4292                  */
4293                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4294                     (struct sockaddr *)NULL,
4295                     (struct sctp_ifa *)NULL,
4296                     p
4297                     ))) {
4298                         /* bind error, probably perm */
4299                         *error = err;
4300                         return (NULL);
4301                 }
4302         }
4303         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4304         if (stcb == NULL) {
4305                 /* out of memory? */
4306                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4307                 *error = ENOMEM;
4308                 return (NULL);
4309         }
4310         SCTP_INCR_ASOC_COUNT();
4311
4312         bzero(stcb, sizeof(*stcb));
4313         asoc = &stcb->asoc;
4314
4315         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4316         SCTP_TCB_LOCK_INIT(stcb);
4317         SCTP_TCB_SEND_LOCK_INIT(stcb);
4318         stcb->rport = rport;
4319         /* setup back pointer's */
4320         stcb->sctp_ep = inp;
4321         stcb->sctp_socket = inp->sctp_socket;
4322         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4323                 /* failed */
4324                 SCTP_TCB_LOCK_DESTROY(stcb);
4325                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4326                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4327                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4328                 SCTP_DECR_ASOC_COUNT();
4329                 *error = err;
4330                 return (NULL);
4331         }
4332         /* and the port */
4333         SCTP_INP_INFO_WLOCK();
4334         SCTP_INP_WLOCK(inp);
4335         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4336                 /* inpcb freed while alloc going on */
4337                 SCTP_TCB_LOCK_DESTROY(stcb);
4338                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4339                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4340                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4341                 SCTP_INP_WUNLOCK(inp);
4342                 SCTP_INP_INFO_WUNLOCK();
4343                 SCTP_DECR_ASOC_COUNT();
4344                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4345                 *error = EINVAL;
4346                 return (NULL);
4347         }
4348         SCTP_TCB_LOCK(stcb);
4349
4350         /* now that my_vtag is set, add it to the hash */
4351         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4352         /* put it in the bucket in the vtag hash of assoc's for the system */
4353         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4354         SCTP_INP_INFO_WUNLOCK();
4355
4356         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4357                 /* failure.. memory error? */
4358                 if (asoc->strmout) {
4359                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4360                         asoc->strmout = NULL;
4361                 }
4362                 if (asoc->mapping_array) {
4363                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4364                         asoc->mapping_array = NULL;
4365                 }
4366                 if (asoc->nr_mapping_array) {
4367                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4368                         asoc->nr_mapping_array = NULL;
4369                 }
4370                 SCTP_DECR_ASOC_COUNT();
4371                 SCTP_TCB_UNLOCK(stcb);
4372                 SCTP_TCB_LOCK_DESTROY(stcb);
4373                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4374                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4375                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4376                 SCTP_INP_WUNLOCK(inp);
4377                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4378                 *error = ENOBUFS;
4379                 return (NULL);
4380         }
4381         /* Init all the timers */
4382         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4383         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4384         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4385         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4386         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4387         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4388         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4389
4390         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4391         /* now file the port under the hash as well */
4392         if (inp->sctp_tcbhash != NULL) {
4393                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4394                     inp->sctp_hashmark)];
4395                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4396         }
4397         SCTP_INP_WUNLOCK(inp);
4398         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4399         return (stcb);
4400 }
4401
4402
4403 void
4404 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4405 {
4406         struct sctp_association *asoc;
4407
4408         asoc = &stcb->asoc;
4409         asoc->numnets--;
4410         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4411         if (net == asoc->primary_destination) {
4412                 /* Reset primary */
4413                 struct sctp_nets *lnet;
4414
4415                 lnet = TAILQ_FIRST(&asoc->nets);
4416                 /*
4417                  * Mobility adaptation Ideally, if deleted destination is
4418                  * the primary, it becomes a fast retransmission trigger by
4419                  * the subsequent SET PRIMARY. (by micchie)
4420                  */
4421                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4422                     SCTP_MOBILITY_BASE) ||
4423                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4424                     SCTP_MOBILITY_FASTHANDOFF)) {
4425                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4426                         if (asoc->deleted_primary != NULL) {
4427                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4428                                 goto out;
4429                         }
4430                         asoc->deleted_primary = net;
4431                         atomic_add_int(&net->ref_count, 1);
4432                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4433                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4434                         sctp_mobility_feature_on(stcb->sctp_ep,
4435                             SCTP_MOBILITY_PRIM_DELETED);
4436                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4437                             stcb->sctp_ep, stcb, NULL);
4438                 }
4439 out:
4440                 /* Try to find a confirmed primary */
4441                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4442         }
4443         if (net == asoc->last_data_chunk_from) {
4444                 /* Reset primary */
4445                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4446         }
4447         if (net == asoc->last_control_chunk_from) {
4448                 /* Clear net */
4449                 asoc->last_control_chunk_from = NULL;
4450         }
4451         if (net == stcb->asoc.alternate) {
4452                 sctp_free_remote_addr(stcb->asoc.alternate);
4453                 stcb->asoc.alternate = NULL;
4454         }
4455         sctp_free_remote_addr(net);
4456 }
4457
4458 /*
4459  * remove a remote endpoint address from an association, it will fail if the
4460  * address does not exist.
4461  */
4462 int
4463 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4464 {
4465         /*
4466          * Here we need to remove a remote address. This is quite simple, we
4467          * first find it in the list of address for the association
4468          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4469          * on that item. Note we do not allow it to be removed if there are
4470          * no other addresses.
4471          */
4472         struct sctp_association *asoc;
4473         struct sctp_nets *net, *nnet;
4474
4475         asoc = &stcb->asoc;
4476
4477         /* locate the address */
4478         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4479                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4480                         continue;
4481                 }
4482                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4483                     remaddr)) {
4484                         /* we found the guy */
4485                         if (asoc->numnets < 2) {
4486                                 /* Must have at LEAST two remote addresses */
4487                                 return (-1);
4488                         } else {
4489                                 sctp_remove_net(stcb, net);
4490                                 return (0);
4491                         }
4492                 }
4493         }
4494         /* not found. */
4495         return (-2);
4496 }
4497
4498 void
4499 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4500 {
4501         struct sctpvtaghead *chain;
4502         struct sctp_tagblock *twait_block;
4503         int found = 0;
4504         int i;
4505
4506         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4507         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4508                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4509                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4510                             (twait_block->vtag_block[i].lport == lport) &&
4511                             (twait_block->vtag_block[i].rport == rport)) {
4512                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4513                                 twait_block->vtag_block[i].v_tag = 0;
4514                                 twait_block->vtag_block[i].lport = 0;
4515                                 twait_block->vtag_block[i].rport = 0;
4516                                 found = 1;
4517                                 break;
4518                         }
4519                 }
4520                 if (found)
4521                         break;
4522         }
4523 }
4524
4525 int
4526 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4527 {
4528         struct sctpvtaghead *chain;
4529         struct sctp_tagblock *twait_block;
4530         int found = 0;
4531         int i;
4532
4533         SCTP_INP_INFO_WLOCK();
4534         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4535         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4536                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4537                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4538                             (twait_block->vtag_block[i].lport == lport) &&
4539                             (twait_block->vtag_block[i].rport == rport)) {
4540                                 found = 1;
4541                                 break;
4542                         }
4543                 }
4544                 if (found)
4545                         break;
4546         }
4547         SCTP_INP_INFO_WUNLOCK();
4548         return (found);
4549 }
4550
4551
4552 void
4553 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4554 {
4555         struct sctpvtaghead *chain;
4556         struct sctp_tagblock *twait_block;
4557         struct timeval now;
4558         int set, i;
4559
4560         if (time == 0) {
4561                 /* Its disabled */
4562                 return;
4563         }
4564         (void)SCTP_GETTIME_TIMEVAL(&now);
4565         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4566         set = 0;
4567         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4568                 /* Block(s) present, lets find space, and expire on the fly */
4569                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4570                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4571                             !set) {
4572                                 twait_block->vtag_block[i].tv_sec_at_expire =
4573                                     now.tv_sec + time;
4574                                 twait_block->vtag_block[i].v_tag = tag;
4575                                 twait_block->vtag_block[i].lport = lport;
4576                                 twait_block->vtag_block[i].rport = rport;
4577                                 set = 1;
4578                         } else if ((twait_block->vtag_block[i].v_tag) &&
4579                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4580                                 /* Audit expires this guy */
4581                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4582                                 twait_block->vtag_block[i].v_tag = 0;
4583                                 twait_block->vtag_block[i].lport = 0;
4584                                 twait_block->vtag_block[i].rport = 0;
4585                                 if (set == 0) {
4586                                         /* Reuse it for my new tag */
4587                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4588                                         twait_block->vtag_block[i].v_tag = tag;
4589                                         twait_block->vtag_block[i].lport = lport;
4590                                         twait_block->vtag_block[i].rport = rport;
4591                                         set = 1;
4592                                 }
4593                         }
4594                 }
4595                 if (set) {
4596                         /*
4597                          * We only do up to the block where we can place our
4598                          * tag for audits
4599                          */
4600                         break;
4601                 }
4602         }
4603         /* Need to add a new block to chain */
4604         if (!set) {
4605                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4606                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4607                 if (twait_block == NULL) {
4608 #ifdef INVARIANTS
4609                         panic("Can not alloc tagblock");
4610 #endif
4611                         return;
4612                 }
4613                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4614                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4615                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4616                 twait_block->vtag_block[0].v_tag = tag;
4617                 twait_block->vtag_block[0].lport = lport;
4618                 twait_block->vtag_block[0].rport = rport;
4619         }
4620 }
4621
4622
4623
4624 /*-
4625  * Free the association after un-hashing the remote port. This
4626  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4627  * expect that the input to this function IS a locked TCB.
4628  * It will return 0, if it did NOT destroy the association (instead
4629  * it unlocks it. It will return NON-zero if it either destroyed the
4630  * association OR the association is already destroyed.
4631  */
4632 int
4633 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4634 {
4635         int i;
4636         struct sctp_association *asoc;
4637         struct sctp_nets *net, *nnet;
4638         struct sctp_laddr *laddr, *naddr;
4639         struct sctp_tmit_chunk *chk, *nchk;
4640         struct sctp_asconf_addr *aparam, *naparam;
4641         struct sctp_asconf_ack *aack, *naack;
4642         struct sctp_stream_reset_list *strrst, *nstrrst;
4643         struct sctp_queued_to_read *sq, *nsq;
4644         struct sctp_stream_queue_pending *sp, *nsp;
4645         sctp_sharedkey_t *shared_key, *nshared_key;
4646         struct socket *so;
4647
4648         /* first, lets purge the entry from the hash table. */
4649
4650 #ifdef SCTP_LOG_CLOSING
4651         sctp_log_closing(inp, stcb, 6);
4652 #endif
4653         if (stcb->asoc.state == 0) {
4654 #ifdef SCTP_LOG_CLOSING
4655                 sctp_log_closing(inp, NULL, 7);
4656 #endif
4657                 /* there is no asoc, really TSNH :-0 */
4658                 return (1);
4659         }
4660         if (stcb->asoc.alternate) {
4661                 sctp_free_remote_addr(stcb->asoc.alternate);
4662                 stcb->asoc.alternate = NULL;
4663         }
4664         /* TEMP CODE */
4665         if (stcb->freed_from_where == 0) {
4666                 /* Only record the first place free happened from */
4667                 stcb->freed_from_where = from_location;
4668         }
4669         /* TEMP CODE */
4670
4671         asoc = &stcb->asoc;
4672         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4673             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4674                 /* nothing around */
4675                 so = NULL;
4676         else
4677                 so = inp->sctp_socket;
4678
4679         /*
4680          * We used timer based freeing if a reader or writer is in the way.
4681          * So we first check if we are actually being called from a timer,
4682          * if so we abort early if a reader or writer is still in the way.
4683          */
4684         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4685             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4686                 /*
4687                  * is it the timer driving us? if so are the reader/writers
4688                  * gone?
4689                  */
4690                 if (stcb->asoc.refcnt) {
4691                         /* nope, reader or writer in the way */
4692                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4693                         /* no asoc destroyed */
4694                         SCTP_TCB_UNLOCK(stcb);
4695 #ifdef SCTP_LOG_CLOSING
4696                         sctp_log_closing(inp, stcb, 8);
4697 #endif
4698                         return (0);
4699                 }
4700         }
4701         /* now clean up any other timers */
4702         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4703         asoc->dack_timer.self = NULL;
4704         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4705         /*-
4706          * For stream reset we don't blast this unless
4707          * it is a str-reset timer, it might be the
4708          * free-asoc timer which we DON'T want to
4709          * disturb.
4710          */
4711         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4712                 asoc->strreset_timer.self = NULL;
4713         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4714         asoc->asconf_timer.self = NULL;
4715         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4716         asoc->autoclose_timer.self = NULL;
4717         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4718         asoc->shut_guard_timer.self = NULL;
4719         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4720         asoc->delayed_event_timer.self = NULL;
4721         /* Mobility adaptation */
4722         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4723         asoc->delete_prim_timer.self = NULL;
4724         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4725                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4726                 net->rxt_timer.self = NULL;
4727                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4728                 net->pmtu_timer.self = NULL;
4729                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4730                 net->hb_timer.self = NULL;
4731         }
4732         /* Now the read queue needs to be cleaned up (only once) */
4733         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4734                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4735                 SCTP_INP_READ_LOCK(inp);
4736                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4737                         if (sq->stcb == stcb) {
4738                                 sq->do_not_ref_stcb = 1;
4739                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4740                                 /*
4741                                  * If there is no end, there never will be
4742                                  * now.
4743                                  */
4744                                 if (sq->end_added == 0) {
4745                                         /* Held for PD-API clear that. */
4746                                         sq->pdapi_aborted = 1;
4747                                         sq->held_length = 0;
4748                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4749                                                 /*
4750                                                  * Need to add a PD-API
4751                                                  * aborted indication.
4752                                                  * Setting the control_pdapi
4753                                                  * assures that it will be
4754                                                  * added right after this
4755                                                  * msg.
4756                                                  */
4757                                                 uint32_t strseq;
4758
4759                                                 stcb->asoc.control_pdapi = sq;
4760                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4761                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4762                                                     stcb,
4763                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4764                                                     (void *)&strseq,
4765                                                     SCTP_SO_LOCKED);
4766                                                 stcb->asoc.control_pdapi = NULL;
4767                                         }
4768                                 }
4769                                 /* Add an end to wake them */
4770                                 sq->end_added = 1;
4771                         }
4772                 }
4773                 SCTP_INP_READ_UNLOCK(inp);
4774                 if (stcb->block_entry) {
4775                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4776                         stcb->block_entry->error = ECONNRESET;
4777                         stcb->block_entry = NULL;
4778                 }
4779         }
4780         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4781                 /*
4782                  * Someone holds a reference OR the socket is unaccepted
4783                  * yet.
4784                  */
4785                 if ((stcb->asoc.refcnt) ||
4786                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4787                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4788                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4789                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4790                 }
4791                 SCTP_TCB_UNLOCK(stcb);
4792                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4793                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4794                         /* nothing around */
4795                         so = NULL;
4796                 if (so) {
4797                         /* Wake any reader/writers */
4798                         sctp_sorwakeup(inp, so);
4799                         sctp_sowwakeup(inp, so);
4800                 }
4801 #ifdef SCTP_LOG_CLOSING
4802                 sctp_log_closing(inp, stcb, 9);
4803 #endif
4804                 /* no asoc destroyed */
4805                 return (0);
4806         }
4807 #ifdef SCTP_LOG_CLOSING
4808         sctp_log_closing(inp, stcb, 10);
4809 #endif
4810         /*
4811          * When I reach here, no others want to kill the assoc yet.. and I
4812          * own the lock. Now its possible an abort comes in when I do the
4813          * lock exchange below to grab all the locks to do the final take
4814          * out. to prevent this we increment the count, which will start a
4815          * timer and blow out above thus assuring us that we hold exclusive
4816          * killing of the asoc. Note that after getting back the TCB lock we
4817          * will go ahead and increment the counter back up and stop any
4818          * timer a passing stranger may have started :-S
4819          */
4820         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4821                 atomic_add_int(&stcb->asoc.refcnt, 1);
4822
4823                 SCTP_TCB_UNLOCK(stcb);
4824                 SCTP_INP_INFO_WLOCK();
4825                 SCTP_INP_WLOCK(inp);
4826                 SCTP_TCB_LOCK(stcb);
4827         }
4828         /* Double check the GONE flag */
4829         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4830             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4831                 /* nothing around */
4832                 so = NULL;
4833
4834         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4835             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4836                 /*
4837                  * For TCP type we need special handling when we are
4838                  * connected. We also include the peel'ed off ones to.
4839                  */
4840                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4841                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4842                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4843                         if (so) {
4844                                 SOCK_LOCK(so);
4845                                 if (so->so_rcv.sb_cc == 0) {
4846                                         so->so_state &= ~(SS_ISCONNECTING |
4847                                             SS_ISDISCONNECTING |
4848                                             SS_ISCONFIRMING |
4849                                             SS_ISCONNECTED);
4850                                 }
4851                                 socantrcvmore_locked(so);
4852                                 sctp_sowwakeup(inp, so);
4853                                 sctp_sorwakeup(inp, so);
4854                                 SCTP_SOWAKEUP(so);
4855                         }
4856                 }
4857         }
4858         /*
4859          * Make it invalid too, that way if its about to run it will abort
4860          * and return.
4861          */
4862         /* re-increment the lock */
4863         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4864                 atomic_add_int(&stcb->asoc.refcnt, -1);
4865         }
4866         if (stcb->asoc.refcnt) {
4867                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4868                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4869                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4870                         SCTP_INP_INFO_WUNLOCK();
4871                         SCTP_INP_WUNLOCK(inp);
4872                 }
4873                 SCTP_TCB_UNLOCK(stcb);
4874                 return (0);
4875         }
4876         asoc->state = 0;
4877         if (inp->sctp_tcbhash) {
4878                 LIST_REMOVE(stcb, sctp_tcbhash);
4879         }
4880         if (stcb->asoc.in_asocid_hash) {
4881                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4882         }
4883         /* Now lets remove it from the list of ALL associations in the EP */
4884         LIST_REMOVE(stcb, sctp_tcblist);
4885         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4886                 SCTP_INP_INCR_REF(inp);
4887                 SCTP_INP_WUNLOCK(inp);
4888         }
4889         /* pull from vtag hash */
4890         LIST_REMOVE(stcb, sctp_asocs);
4891         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4892             inp->sctp_lport, stcb->rport);
4893
4894         /*
4895          * Now restop the timers to be sure this is paranoia at is finest!
4896          */
4897         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4898         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4899         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4900         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4901         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4902         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4903         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4904         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4905                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4906                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4907                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4908         }
4909
4910         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4911         /*
4912          * The chunk lists and such SHOULD be empty but we check them just
4913          * in case.
4914          */
4915         /* anything on the wheel needs to be removed */
4916         for (i = 0; i < asoc->streamoutcnt; i++) {
4917                 struct sctp_stream_out *outs;
4918
4919                 outs = &asoc->strmout[i];
4920                 /* now clean up any chunks here */
4921                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4922                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4923                         sctp_free_spbufspace(stcb, asoc, sp);
4924                         if (sp->data) {
4925                                 if (so) {
4926                                         /* Still an open socket - report */
4927                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4928                                             0, (void *)sp, SCTP_SO_LOCKED);
4929                                 }
4930                                 if (sp->data) {
4931                                         sctp_m_freem(sp->data);
4932                                         sp->data = NULL;
4933                                         sp->tail_mbuf = NULL;
4934                                         sp->length = 0;
4935                                 }
4936                         }
4937                         if (sp->net) {
4938                                 sctp_free_remote_addr(sp->net);
4939                                 sp->net = NULL;
4940                         }
4941                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4942                 }
4943         }
4944         /* sa_ignore FREED_MEMORY */
4945         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4946                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4947                 SCTP_FREE(strrst, SCTP_M_STRESET);
4948         }
4949         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4950                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4951                 if (sq->data) {
4952                         sctp_m_freem(sq->data);
4953                         sq->data = NULL;
4954                 }
4955                 sctp_free_remote_addr(sq->whoFrom);
4956                 sq->whoFrom = NULL;
4957                 sq->stcb = NULL;
4958                 /* Free the ctl entry */
4959                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4960                 SCTP_DECR_READQ_COUNT();
4961                 /* sa_ignore FREED_MEMORY */
4962         }
4963         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4964                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4965                 if (chk->data) {
4966                         sctp_m_freem(chk->data);
4967                         chk->data = NULL;
4968                 }
4969                 if (chk->holds_key_ref)
4970                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4971                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4972                 SCTP_DECR_CHK_COUNT();
4973                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4974                 asoc->free_chunk_cnt--;
4975                 /* sa_ignore FREED_MEMORY */
4976         }
4977         /* pending send queue SHOULD be empty */
4978         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4979                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4980                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4981 #ifdef INVARIANTS
4982                 } else {
4983                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4984 #endif
4985                 }
4986                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4987                 if (chk->data) {
4988                         if (so) {
4989                                 /* Still a socket? */
4990                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4991                                     0, chk, SCTP_SO_LOCKED);
4992                         }
4993                         if (chk->data) {
4994                                 sctp_m_freem(chk->data);
4995                                 chk->data = NULL;
4996                         }
4997                 }
4998                 if (chk->holds_key_ref)
4999                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5000                 if (chk->whoTo) {
5001                         sctp_free_remote_addr(chk->whoTo);
5002                         chk->whoTo = NULL;
5003                 }
5004                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5005                 SCTP_DECR_CHK_COUNT();
5006                 /* sa_ignore FREED_MEMORY */
5007         }
5008         /* sent queue SHOULD be empty */
5009         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5010                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5011                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5012                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5013 #ifdef INVARIANTS
5014                         } else {
5015                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5016 #endif
5017                         }
5018                 }
5019                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5020                 if (chk->data) {
5021                         if (so) {
5022                                 /* Still a socket? */
5023                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5024                                     0, chk, SCTP_SO_LOCKED);
5025                         }
5026                         if (chk->data) {
5027                                 sctp_m_freem(chk->data);
5028                                 chk->data = NULL;
5029                         }
5030                 }
5031                 if (chk->holds_key_ref)
5032                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5033                 sctp_free_remote_addr(chk->whoTo);
5034                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5035                 SCTP_DECR_CHK_COUNT();
5036                 /* sa_ignore FREED_MEMORY */
5037         }
5038 #ifdef INVARIANTS
5039         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5040                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5041                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5042                 }
5043         }
5044 #endif
5045         /* control queue MAY not be empty */
5046         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5047                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5048                 if (chk->data) {
5049                         sctp_m_freem(chk->data);
5050                         chk->data = NULL;
5051                 }
5052                 if (chk->holds_key_ref)
5053                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5054                 sctp_free_remote_addr(chk->whoTo);
5055                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5056                 SCTP_DECR_CHK_COUNT();
5057                 /* sa_ignore FREED_MEMORY */
5058         }
5059         /* ASCONF queue MAY not be empty */
5060         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5061                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5062                 if (chk->data) {
5063                         sctp_m_freem(chk->data);
5064                         chk->data = NULL;
5065                 }
5066                 if (chk->holds_key_ref)
5067                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5068                 sctp_free_remote_addr(chk->whoTo);
5069                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5070                 SCTP_DECR_CHK_COUNT();
5071                 /* sa_ignore FREED_MEMORY */
5072         }
5073         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5074                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5075                 if (chk->data) {
5076                         sctp_m_freem(chk->data);
5077                         chk->data = NULL;
5078                 }
5079                 if (chk->holds_key_ref)
5080                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5081                 sctp_free_remote_addr(chk->whoTo);
5082                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5083                 SCTP_DECR_CHK_COUNT();
5084                 /* sa_ignore FREED_MEMORY */
5085         }
5086
5087         if (asoc->mapping_array) {
5088                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5089                 asoc->mapping_array = NULL;
5090         }
5091         if (asoc->nr_mapping_array) {
5092                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5093                 asoc->nr_mapping_array = NULL;
5094         }
5095         /* the stream outs */
5096         if (asoc->strmout) {
5097                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5098                 asoc->strmout = NULL;
5099         }
5100         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5101         if (asoc->strmin) {
5102                 struct sctp_queued_to_read *ctl, *nctl;
5103
5104                 for (i = 0; i < asoc->streamincnt; i++) {
5105                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5106                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5107                                 sctp_free_remote_addr(ctl->whoFrom);
5108                                 if (ctl->data) {
5109                                         sctp_m_freem(ctl->data);
5110                                         ctl->data = NULL;
5111                                 }
5112                                 /*
5113                                  * We don't free the address here since all
5114                                  * the net's were freed above.
5115                                  */
5116                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5117                                 SCTP_DECR_READQ_COUNT();
5118                         }
5119                 }
5120                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5121                 asoc->strmin = NULL;
5122         }
5123         asoc->streamincnt = 0;
5124         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5125 #ifdef INVARIANTS
5126                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5127                         panic("no net's left alloc'ed, or list points to itself");
5128                 }
5129 #endif
5130                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5131                 sctp_free_remote_addr(net);
5132         }
5133         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5134                 /* sa_ignore FREED_MEMORY */
5135                 sctp_remove_laddr(laddr);
5136         }
5137
5138         /* pending asconf (address) parameters */
5139         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5140                 /* sa_ignore FREED_MEMORY */
5141                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5142                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5143         }
5144         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5145                 /* sa_ignore FREED_MEMORY */
5146                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5147                 if (aack->data != NULL) {
5148                         sctp_m_freem(aack->data);
5149                 }
5150                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5151         }
5152         /* clean up auth stuff */
5153         if (asoc->local_hmacs)
5154                 sctp_free_hmaclist(asoc->local_hmacs);
5155         if (asoc->peer_hmacs)
5156                 sctp_free_hmaclist(asoc->peer_hmacs);
5157
5158         if (asoc->local_auth_chunks)
5159                 sctp_free_chunklist(asoc->local_auth_chunks);
5160         if (asoc->peer_auth_chunks)
5161                 sctp_free_chunklist(asoc->peer_auth_chunks);
5162
5163         sctp_free_authinfo(&asoc->authinfo);
5164
5165         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5166                 LIST_REMOVE(shared_key, next);
5167                 sctp_free_sharedkey(shared_key);
5168                 /* sa_ignore FREED_MEMORY */
5169         }
5170
5171         /* Insert new items here :> */
5172
5173         /* Get rid of LOCK */
5174         SCTP_TCB_UNLOCK(stcb);
5175         SCTP_TCB_LOCK_DESTROY(stcb);
5176         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5177         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5178                 SCTP_INP_INFO_WUNLOCK();
5179                 SCTP_INP_RLOCK(inp);
5180         }
5181 #ifdef SCTP_TRACK_FREED_ASOCS
5182         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5183                 /* now clean up the tasoc itself */
5184                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5185                 SCTP_DECR_ASOC_COUNT();
5186         } else {
5187                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5188         }
5189 #else
5190         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5191         SCTP_DECR_ASOC_COUNT();
5192 #endif
5193         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5194                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5195                         /*
5196                          * If its NOT the inp_free calling us AND sctp_close
5197                          * as been called, we call back...
5198                          */
5199                         SCTP_INP_RUNLOCK(inp);
5200                         /*
5201                          * This will start the kill timer (if we are the
5202                          * last one) since we hold an increment yet. But
5203                          * this is the only safe way to do this since
5204                          * otherwise if the socket closes at the same time
5205                          * we are here we might collide in the cleanup.
5206                          */
5207                         sctp_inpcb_free(inp,
5208                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5209                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5210                         SCTP_INP_DECR_REF(inp);
5211                         goto out_of;
5212                 } else {
5213                         /* The socket is still open. */
5214                         SCTP_INP_DECR_REF(inp);
5215                 }
5216         }
5217         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5218                 SCTP_INP_RUNLOCK(inp);
5219         }
5220 out_of:
5221         /* destroyed the asoc */
5222 #ifdef SCTP_LOG_CLOSING
5223         sctp_log_closing(inp, NULL, 11);
5224 #endif
5225         return (1);
5226 }
5227
5228
5229
5230 /*
5231  * determine if a destination is "reachable" based upon the addresses bound
5232  * to the current endpoint (e.g. only v4 or v6 currently bound)
5233  */
5234 /*
5235  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5236  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5237  * types bound as its endpoint
5238  */
5239 int
5240 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5241 {
5242         struct sctp_inpcb *inp;
5243         int answer;
5244
5245         /*
5246          * No locks here, the TCB, in all cases is already locked and an
5247          * assoc is up. There is either a INP lock by the caller applied (in
5248          * asconf case when deleting an address) or NOT in the HB case,
5249          * however if HB then the INP increment is up and the INP will not
5250          * be removed (on top of the fact that we have a TCB lock). So we
5251          * only want to read the sctp_flags, which is either bound-all or
5252          * not.. no protection needed since once an assoc is up you can't be
5253          * changing your binding.
5254          */
5255         inp = stcb->sctp_ep;
5256         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5257                 /* if bound all, destination is not restricted */
5258                 /*
5259                  * RRS: Question during lock work: Is this correct? If you
5260                  * are bound-all you still might need to obey the V4--V6
5261                  * flags??? IMO this bound-all stuff needs to be removed!
5262                  */
5263                 return (1);
5264         }
5265         /* NOTE: all "scope" checks are done when local addresses are added */
5266         switch (destaddr->sa_family) {
5267 #ifdef INET6
5268         case AF_INET6:
5269                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5270                 break;
5271 #endif
5272 #ifdef INET
5273         case AF_INET:
5274                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5275                 break;
5276 #endif
5277         default:
5278                 /* invalid family, so it's unreachable */
5279                 answer = 0;
5280                 break;
5281         }
5282         return (answer);
5283 }
5284
5285 /*
5286  * update the inp_vflags on an endpoint
5287  */
5288 static void
5289 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5290 {
5291         struct sctp_laddr *laddr;
5292
5293         /* first clear the flag */
5294         inp->ip_inp.inp.inp_vflag = 0;
5295         /* set the flag based on addresses on the ep list */
5296         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5297                 if (laddr->ifa == NULL) {
5298                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5299                             __func__);
5300                         continue;
5301                 }
5302                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5303                         continue;
5304                 }
5305                 switch (laddr->ifa->address.sa.sa_family) {
5306 #ifdef INET6
5307                 case AF_INET6:
5308                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5309                         break;
5310 #endif
5311 #ifdef INET
5312                 case AF_INET:
5313                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5314                         break;
5315 #endif
5316                 default:
5317                         break;
5318                 }
5319         }
5320 }
5321
5322 /*
5323  * Add the address to the endpoint local address list There is nothing to be
5324  * done if we are bound to all addresses
5325  */
5326 void
5327 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5328 {
5329         struct sctp_laddr *laddr;
5330         int fnd, error = 0;
5331
5332         fnd = 0;
5333
5334         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5335                 /* You are already bound to all. You have it already */
5336                 return;
5337         }
5338 #ifdef INET6
5339         if (ifa->address.sa.sa_family == AF_INET6) {
5340                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5341                         /* Can't bind a non-useable addr. */
5342                         return;
5343                 }
5344         }
5345 #endif
5346         /* first, is it already present? */
5347         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5348                 if (laddr->ifa == ifa) {
5349                         fnd = 1;
5350                         break;
5351                 }
5352         }
5353
5354         if (fnd == 0) {
5355                 /* Not in the ep list */
5356                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5357                 if (error != 0)
5358                         return;
5359                 inp->laddr_count++;
5360                 /* update inp_vflag flags */
5361                 switch (ifa->address.sa.sa_family) {
5362 #ifdef INET6
5363                 case AF_INET6:
5364                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5365                         break;
5366 #endif
5367 #ifdef INET
5368                 case AF_INET:
5369                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5370                         break;
5371 #endif
5372                 default:
5373                         break;
5374                 }
5375         }
5376         return;
5377 }
5378
5379
5380 /*
5381  * select a new (hopefully reachable) destination net (should only be used
5382  * when we deleted an ep addr that is the only usable source address to reach
5383  * the destination net)
5384  */
5385 static void
5386 sctp_select_primary_destination(struct sctp_tcb *stcb)
5387 {
5388         struct sctp_nets *net;
5389
5390         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5391                 /* for now, we'll just pick the first reachable one we find */
5392                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5393                         continue;
5394                 if (sctp_destination_is_reachable(stcb,
5395                     (struct sockaddr *)&net->ro._l_addr)) {
5396                         /* found a reachable destination */
5397                         stcb->asoc.primary_destination = net;
5398                 }
5399         }
5400         /* I can't there from here! ...we're gonna die shortly... */
5401 }
5402
5403
5404 /*
5405  * Delete the address from the endpoint local address list There is nothing
5406  * to be done if we are bound to all addresses
5407  */
5408 void
5409 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5410 {
5411         struct sctp_laddr *laddr;
5412         int fnd;
5413
5414         fnd = 0;
5415         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5416                 /* You are already bound to all. You have it already */
5417                 return;
5418         }
5419         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5420                 if (laddr->ifa == ifa) {
5421                         fnd = 1;
5422                         break;
5423                 }
5424         }
5425         if (fnd && (inp->laddr_count < 2)) {
5426                 /* can't delete unless there are at LEAST 2 addresses */
5427                 return;
5428         }
5429         if (fnd) {
5430                 /*
5431                  * clean up any use of this address go through our
5432                  * associations and clear any last_used_address that match
5433                  * this one for each assoc, see if a new primary_destination
5434                  * is needed
5435                  */
5436                 struct sctp_tcb *stcb;
5437
5438                 /* clean up "next_addr_touse" */
5439                 if (inp->next_addr_touse == laddr)
5440                         /* delete this address */
5441                         inp->next_addr_touse = NULL;
5442
5443                 /* clean up "last_used_address" */
5444                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5445                         struct sctp_nets *net;
5446
5447                         SCTP_TCB_LOCK(stcb);
5448                         if (stcb->asoc.last_used_address == laddr)
5449                                 /* delete this address */
5450                                 stcb->asoc.last_used_address = NULL;
5451                         /*
5452                          * Now spin through all the nets and purge any ref
5453                          * to laddr
5454                          */
5455                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5456                                 if (net->ro._s_addr &&
5457                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5458                                         /* Yep, purge src address selected */
5459                                         sctp_rtentry_t *rt;
5460
5461                                         /* delete this address if cached */
5462                                         rt = net->ro.ro_rt;
5463                                         if (rt != NULL) {
5464                                                 RTFREE(rt);
5465                                                 net->ro.ro_rt = NULL;
5466                                         }
5467                                         sctp_free_ifa(net->ro._s_addr);
5468                                         net->ro._s_addr = NULL;
5469                                         net->src_addr_selected = 0;
5470                                 }
5471                         }
5472                         SCTP_TCB_UNLOCK(stcb);
5473                 }               /* for each tcb */
5474                 /* remove it from the ep list */
5475                 sctp_remove_laddr(laddr);
5476                 inp->laddr_count--;
5477                 /* update inp_vflag flags */
5478                 sctp_update_ep_vflag(inp);
5479         }
5480         return;
5481 }
5482
5483 /*
5484  * Add the address to the TCB local address restricted list.
5485  * This is a "pending" address list (eg. addresses waiting for an
5486  * ASCONF-ACK response) and cannot be used as a valid source address.
5487  */
5488 void
5489 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5490 {
5491         struct sctp_laddr *laddr;
5492         struct sctpladdr *list;
5493
5494         /*
5495          * Assumes TCB is locked.. and possibly the INP. May need to
5496          * confirm/fix that if we need it and is not the case.
5497          */
5498         list = &stcb->asoc.sctp_restricted_addrs;
5499
5500 #ifdef INET6
5501         if (ifa->address.sa.sa_family == AF_INET6) {
5502                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5503                         /* Can't bind a non-existent addr. */
5504                         return;
5505                 }
5506         }
5507 #endif
5508         /* does the address already exist? */
5509         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5510                 if (laddr->ifa == ifa) {
5511                         return;
5512                 }
5513         }
5514
5515         /* add to the list */
5516         (void)sctp_insert_laddr(list, ifa, 0);
5517         return;
5518 }
5519
5520 /*
5521  * insert an laddr entry with the given ifa for the desired list
5522  */
5523 int
5524 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5525 {
5526         struct sctp_laddr *laddr;
5527
5528         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5529         if (laddr == NULL) {
5530                 /* out of memory? */
5531                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5532                 return (EINVAL);
5533         }
5534         SCTP_INCR_LADDR_COUNT();
5535         bzero(laddr, sizeof(*laddr));
5536         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5537         laddr->ifa = ifa;
5538         laddr->action = act;
5539         atomic_add_int(&ifa->refcount, 1);
5540         /* insert it */
5541         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5542
5543         return (0);
5544 }
5545
5546 /*
5547  * Remove an laddr entry from the local address list (on an assoc)
5548  */
5549 void
5550 sctp_remove_laddr(struct sctp_laddr *laddr)
5551 {
5552
5553         /* remove from the list */
5554         LIST_REMOVE(laddr, sctp_nxt_addr);
5555         sctp_free_ifa(laddr->ifa);
5556         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5557         SCTP_DECR_LADDR_COUNT();
5558 }
5559
5560 /*
5561  * Remove a local address from the TCB local address restricted list
5562  */
5563 void
5564 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5565 {
5566         struct sctp_inpcb *inp;
5567         struct sctp_laddr *laddr;
5568
5569         /*
5570          * This is called by asconf work. It is assumed that a) The TCB is
5571          * locked and b) The INP is locked. This is true in as much as I can
5572          * trace through the entry asconf code where I did these locks.
5573          * Again, the ASCONF code is a bit different in that it does lock
5574          * the INP during its work often times. This must be since we don't
5575          * want other proc's looking up things while what they are looking
5576          * up is changing :-D
5577          */
5578
5579         inp = stcb->sctp_ep;
5580         /* if subset bound and don't allow ASCONF's, can't delete last */
5581         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5582             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5583                 if (stcb->sctp_ep->laddr_count < 2) {
5584                         /* can't delete last address */
5585                         return;
5586                 }
5587         }
5588         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5589                 /* remove the address if it exists */
5590                 if (laddr->ifa == NULL)
5591                         continue;
5592                 if (laddr->ifa == ifa) {
5593                         sctp_remove_laddr(laddr);
5594                         return;
5595                 }
5596         }
5597
5598         /* address not found! */
5599         return;
5600 }
5601
5602 /*
5603  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5604  */
5605 /* sysctl */
5606 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5607 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5608
5609
5610
5611 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5612 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5613 int *sctp_cpuarry = NULL;
5614 void
5615 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5616 {
5617         /* Queue a packet to a processor for the specified core */
5618         struct sctp_mcore_queue *qent;
5619         struct sctp_mcore_ctrl *wkq;
5620         int need_wake = 0;
5621
5622         if (sctp_mcore_workers == NULL) {
5623                 /* Something went way bad during setup */
5624                 sctp_input_with_port(m, off, 0);
5625                 return;
5626         }
5627         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5628             (sizeof(struct sctp_mcore_queue)),
5629             SCTP_M_MCORE);
5630         if (qent == NULL) {
5631                 /* This is trouble  */
5632                 sctp_input_with_port(m, off, 0);
5633                 return;
5634         }
5635         qent->vn = curvnet;
5636         qent->m = m;
5637         qent->off = off;
5638         qent->v6 = 0;
5639         wkq = &sctp_mcore_workers[cpu_to_use];
5640         SCTP_MCORE_QLOCK(wkq);
5641
5642         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5643         if (wkq->running == 0) {
5644                 need_wake = 1;
5645         }
5646         SCTP_MCORE_QUNLOCK(wkq);
5647         if (need_wake) {
5648                 wakeup(&wkq->running);
5649         }
5650 }
5651
5652 static void
5653 sctp_mcore_thread(void *arg)
5654 {
5655
5656         struct sctp_mcore_ctrl *wkq;
5657         struct sctp_mcore_queue *qent;
5658
5659         wkq = (struct sctp_mcore_ctrl *)arg;
5660         struct mbuf *m;
5661         int off, v6;
5662
5663         /* Wait for first tickle */
5664         SCTP_MCORE_LOCK(wkq);
5665         wkq->running = 0;
5666         msleep(&wkq->running,
5667             &wkq->core_mtx,
5668             0, "wait for pkt", 0);
5669         SCTP_MCORE_UNLOCK(wkq);
5670
5671         /* Bind to our cpu */
5672         thread_lock(curthread);
5673         sched_bind(curthread, wkq->cpuid);
5674         thread_unlock(curthread);
5675
5676         /* Now lets start working */
5677         SCTP_MCORE_LOCK(wkq);
5678         /* Now grab lock and go */
5679         for (;;) {
5680                 SCTP_MCORE_QLOCK(wkq);
5681 skip_sleep:
5682                 wkq->running = 1;
5683                 qent = TAILQ_FIRST(&wkq->que);
5684                 if (qent) {
5685                         TAILQ_REMOVE(&wkq->que, qent, next);
5686                         SCTP_MCORE_QUNLOCK(wkq);
5687                         CURVNET_SET(qent->vn);
5688                         m = qent->m;
5689                         off = qent->off;
5690                         v6 = qent->v6;
5691                         SCTP_FREE(qent, SCTP_M_MCORE);
5692                         if (v6 == 0) {
5693                                 sctp_input_with_port(m, off, 0);
5694                         } else {
5695                                 SCTP_PRINTF("V6 not yet supported\n");
5696                                 sctp_m_freem(m);
5697                         }
5698                         CURVNET_RESTORE();
5699                         SCTP_MCORE_QLOCK(wkq);
5700                 }
5701                 wkq->running = 0;
5702                 if (!TAILQ_EMPTY(&wkq->que)) {
5703                         goto skip_sleep;
5704                 }
5705                 SCTP_MCORE_QUNLOCK(wkq);
5706                 msleep(&wkq->running,
5707                     &wkq->core_mtx,
5708                     0, "wait for pkt", 0);
5709         }
5710 }
5711
5712 static void
5713 sctp_startup_mcore_threads(void)
5714 {
5715         int i, cpu;
5716
5717         if (mp_ncpus == 1)
5718                 return;
5719
5720         if (sctp_mcore_workers != NULL) {
5721                 /*
5722                  * Already been here in some previous vnet?
5723                  */
5724                 return;
5725         }
5726         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5727             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5728             SCTP_M_MCORE);
5729         if (sctp_mcore_workers == NULL) {
5730                 /* TSNH I hope */
5731                 return;
5732         }
5733         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5734             sizeof(struct sctp_mcore_ctrl)));
5735         /* Init the structures */
5736         for (i = 0; i <= mp_maxid; i++) {
5737                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5738                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5739                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5740                 sctp_mcore_workers[i].cpuid = i;
5741         }
5742         if (sctp_cpuarry == NULL) {
5743                 SCTP_MALLOC(sctp_cpuarry, int *,
5744                     (mp_ncpus * sizeof(int)),
5745                     SCTP_M_MCORE);
5746                 i = 0;
5747                 CPU_FOREACH(cpu) {
5748                         sctp_cpuarry[i] = cpu;
5749                         i++;
5750                 }
5751         }
5752         /* Now start them all */
5753         CPU_FOREACH(cpu) {
5754                 (void)kproc_create(sctp_mcore_thread,
5755                     (void *)&sctp_mcore_workers[cpu],
5756                     &sctp_mcore_workers[cpu].thread_proc,
5757                     RFPROC,
5758                     SCTP_KTHREAD_PAGES,
5759                     SCTP_MCORE_NAME);
5760
5761         }
5762 }
5763
5764 #endif
5765
5766 void
5767 sctp_pcb_init()
5768 {
5769         /*
5770          * SCTP initialization for the PCB structures should be called by
5771          * the sctp_init() funciton.
5772          */
5773         int i;
5774         struct timeval tv;
5775
5776         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5777                 /* error I was called twice */
5778                 return;
5779         }
5780         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5781
5782 #if defined(SCTP_LOCAL_TRACE_BUF)
5783         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5784 #endif
5785 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5786         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5787             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5788             SCTP_M_MCORE);
5789 #endif
5790         (void)SCTP_GETTIME_TIMEVAL(&tv);
5791 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5792         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5793         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5794         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5795 #else
5796         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5797         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5798         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5799 #endif
5800         /* init the empty list of (All) Endpoints */
5801         LIST_INIT(&SCTP_BASE_INFO(listhead));
5802
5803
5804         /* init the hash table of endpoints */
5805         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5806         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5807         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5808         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5809             &SCTP_BASE_INFO(hashasocmark));
5810         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5811             &SCTP_BASE_INFO(hashmark));
5812         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5813             &SCTP_BASE_INFO(hashtcpmark));
5814         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5815
5816
5817         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5818             &SCTP_BASE_INFO(hashvrfmark));
5819
5820         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5821             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5822         /* init the zones */
5823         /*
5824          * FIX ME: Should check for NULL returns, but if it does fail we are
5825          * doomed to panic anyways... add later maybe.
5826          */
5827         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5828             sizeof(struct sctp_inpcb), maxsockets);
5829
5830         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5831             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5832
5833         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5834             sizeof(struct sctp_laddr),
5835             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5836
5837         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5838             sizeof(struct sctp_nets),
5839             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5840
5841         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5842             sizeof(struct sctp_tmit_chunk),
5843             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5846             sizeof(struct sctp_queued_to_read),
5847             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5848
5849         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5850             sizeof(struct sctp_stream_queue_pending),
5851             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5852
5853         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5854             sizeof(struct sctp_asconf),
5855             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5856
5857         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5858             sizeof(struct sctp_asconf_ack),
5859             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5860
5861
5862         /* Master Lock INIT for info structure */
5863         SCTP_INP_INFO_LOCK_INIT();
5864         SCTP_STATLOG_INIT_LOCK();
5865
5866         SCTP_IPI_COUNT_INIT();
5867         SCTP_IPI_ADDR_INIT();
5868 #ifdef SCTP_PACKET_LOGGING
5869         SCTP_IP_PKTLOG_INIT();
5870 #endif
5871         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5872
5873         SCTP_WQ_ADDR_INIT();
5874         /* not sure if we need all the counts */
5875         SCTP_BASE_INFO(ipi_count_ep) = 0;
5876         /* assoc/tcb zone info */
5877         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5878         /* local addrlist zone info */
5879         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5880         /* remote addrlist zone info */
5881         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5882         /* chunk info */
5883         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5884
5885         /* socket queue zone info */
5886         SCTP_BASE_INFO(ipi_count_readq) = 0;
5887
5888         /* stream out queue cont */
5889         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5890
5891         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5892         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5893
5894         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5895
5896         /* Init the TIMEWAIT list */
5897         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5898                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5899         }
5900         sctp_startup_iterator();
5901
5902 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5903         sctp_startup_mcore_threads();
5904 #endif
5905
5906         /*
5907          * INIT the default VRF which for BSD is the only one, other O/S's
5908          * may have more. But initially they must start with one and then
5909          * add the VRF's as addresses are added.
5910          */
5911         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5912 }
5913
5914 /*
5915  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5916  */
5917 void
5918 sctp_pcb_finish(void)
5919 {
5920         struct sctp_vrflist *vrf_bucket;
5921         struct sctp_vrf *vrf, *nvrf;
5922         struct sctp_ifn *ifn, *nifn;
5923         struct sctp_ifa *ifa, *nifa;
5924         struct sctpvtaghead *chain;
5925         struct sctp_tagblock *twait_block, *prev_twait_block;
5926         struct sctp_laddr *wi, *nwi;
5927         int i;
5928         struct sctp_iterator *it, *nit;
5929
5930         /*
5931          * In FreeBSD the iterator thread never exits but we do clean up.
5932          * The only way FreeBSD reaches here is if we have VRF's but we
5933          * still add the ifdef to make it compile on old versions.
5934          */
5935         SCTP_IPI_ITERATOR_WQ_LOCK();
5936         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5937                 if (it->vn != curvnet) {
5938                         continue;
5939                 }
5940                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5941                 if (it->function_atend != NULL) {
5942                         (*it->function_atend) (it->pointer, it->val);
5943                 }
5944                 SCTP_FREE(it, SCTP_M_ITER);
5945         }
5946         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5947         SCTP_ITERATOR_LOCK();
5948         if ((sctp_it_ctl.cur_it) &&
5949             (sctp_it_ctl.cur_it->vn == curvnet)) {
5950                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5951         }
5952         SCTP_ITERATOR_UNLOCK();
5953         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5954         SCTP_WQ_ADDR_LOCK();
5955         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5956                 LIST_REMOVE(wi, sctp_nxt_addr);
5957                 SCTP_DECR_LADDR_COUNT();
5958                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5959                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5960                 }
5961                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5962         }
5963         SCTP_WQ_ADDR_UNLOCK();
5964
5965         /*
5966          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5967          * destroyed first).
5968          */
5969         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5970         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5971                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5972                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5973                                 /* free the ifa */
5974                                 LIST_REMOVE(ifa, next_bucket);
5975                                 LIST_REMOVE(ifa, next_ifa);
5976                                 SCTP_FREE(ifa, SCTP_M_IFA);
5977                         }
5978                         /* free the ifn */
5979                         LIST_REMOVE(ifn, next_bucket);
5980                         LIST_REMOVE(ifn, next_ifn);
5981                         SCTP_FREE(ifn, SCTP_M_IFN);
5982                 }
5983                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5984                 /* free the vrf */
5985                 LIST_REMOVE(vrf, next_vrf);
5986                 SCTP_FREE(vrf, SCTP_M_VRF);
5987         }
5988         /* free the vrf hashes */
5989         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5990         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5991
5992         /*
5993          * free the TIMEWAIT list elements malloc'd in the function
5994          * sctp_add_vtag_to_timewait()...
5995          */
5996         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5997                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5998                 if (!LIST_EMPTY(chain)) {
5999                         prev_twait_block = NULL;
6000                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6001                                 if (prev_twait_block) {
6002                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6003                                 }
6004                                 prev_twait_block = twait_block;
6005                         }
6006                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6007                 }
6008         }
6009
6010         /* free the locks and mutexes */
6011 #ifdef SCTP_PACKET_LOGGING
6012         SCTP_IP_PKTLOG_DESTROY();
6013 #endif
6014         SCTP_IPI_ADDR_DESTROY();
6015         SCTP_STATLOG_DESTROY();
6016         SCTP_INP_INFO_LOCK_DESTROY();
6017
6018         SCTP_WQ_ADDR_DESTROY();
6019
6020         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6021         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6022         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6023         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6024         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6025         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6026         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6027         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6028         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6029         /* Get rid of other stuff to */
6030         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6031                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6032         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6033                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6034         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6035                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6036 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6037         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6038 #endif
6039 }
6040
6041
6042 int
6043 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6044     int offset, int limit,
6045     struct sockaddr *src, struct sockaddr *dst,
6046     struct sockaddr *altsa)
6047 {
6048         /*
6049          * grub through the INIT pulling addresses and loading them to the
6050          * nets structure in the asoc. The from address in the mbuf should
6051          * also be loaded (if it is not already). This routine can be called
6052          * with either INIT or INIT-ACK's as long as the m points to the IP
6053          * packet and the offset points to the beginning of the parameters.
6054          */
6055         struct sctp_inpcb *inp;
6056         struct sctp_nets *net, *nnet, *net_tmp;
6057         struct sctp_paramhdr *phdr, parm_buf;
6058         struct sctp_tcb *stcb_tmp;
6059         uint16_t ptype, plen;
6060         struct sockaddr *sa;
6061         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6062         struct sctp_auth_random *p_random = NULL;
6063         uint16_t random_len = 0;
6064         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6065         struct sctp_auth_hmac_algo *hmacs = NULL;
6066         uint16_t hmacs_len = 0;
6067         uint8_t saw_asconf = 0;
6068         uint8_t saw_asconf_ack = 0;
6069         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6070         struct sctp_auth_chunk_list *chunks = NULL;
6071         uint16_t num_chunks = 0;
6072         sctp_key_t *new_key;
6073         uint32_t keylen;
6074         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6075         uint8_t peer_supports_ecn;
6076         uint8_t peer_supports_prsctp;
6077         uint8_t peer_supports_auth;
6078         uint8_t peer_supports_asconf;
6079         uint8_t peer_supports_asconf_ack;
6080         uint8_t peer_supports_reconfig;
6081         uint8_t peer_supports_nrsack;
6082         uint8_t peer_supports_pktdrop;
6083
6084 #ifdef INET
6085         struct sockaddr_in sin;
6086
6087 #endif
6088 #ifdef INET6
6089         struct sockaddr_in6 sin6;
6090
6091 #endif
6092
6093         /* First get the destination address setup too. */
6094 #ifdef INET
6095         memset(&sin, 0, sizeof(sin));
6096         sin.sin_family = AF_INET;
6097         sin.sin_len = sizeof(sin);
6098         sin.sin_port = stcb->rport;
6099 #endif
6100 #ifdef INET6
6101         memset(&sin6, 0, sizeof(sin6));
6102         sin6.sin6_family = AF_INET6;
6103         sin6.sin6_len = sizeof(struct sockaddr_in6);
6104         sin6.sin6_port = stcb->rport;
6105 #endif
6106         if (altsa) {
6107                 sa = altsa;
6108         } else {
6109                 sa = src;
6110         }
6111         peer_supports_ecn = 0;
6112         peer_supports_prsctp = 0;
6113         peer_supports_auth = 0;
6114         peer_supports_asconf = 0;
6115         peer_supports_reconfig = 0;
6116         peer_supports_nrsack = 0;
6117         peer_supports_pktdrop = 0;
6118         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6119                 /* mark all addresses that we have currently on the list */
6120                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6121         }
6122         /* does the source address already exist? if so skip it */
6123         inp = stcb->sctp_ep;
6124         atomic_add_int(&stcb->asoc.refcnt, 1);
6125         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6126         atomic_add_int(&stcb->asoc.refcnt, -1);
6127
6128         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6129                 /* we must add the source address */
6130                 /* no scope set here since we have a tcb already. */
6131                 switch (sa->sa_family) {
6132 #ifdef INET
6133                 case AF_INET:
6134                         if (stcb->asoc.scope.ipv4_addr_legal) {
6135                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6136                                         return (-1);
6137                                 }
6138                         }
6139                         break;
6140 #endif
6141 #ifdef INET6
6142                 case AF_INET6:
6143                         if (stcb->asoc.scope.ipv6_addr_legal) {
6144                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6145                                         return (-2);
6146                                 }
6147                         }
6148                         break;
6149 #endif
6150                 default:
6151                         break;
6152                 }
6153         } else {
6154                 if (net_tmp != NULL && stcb_tmp == stcb) {
6155                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6156                 } else if (stcb_tmp != stcb) {
6157                         /* It belongs to another association? */
6158                         if (stcb_tmp)
6159                                 SCTP_TCB_UNLOCK(stcb_tmp);
6160                         return (-3);
6161                 }
6162         }
6163         if (stcb->asoc.state == 0) {
6164                 /* the assoc was freed? */
6165                 return (-4);
6166         }
6167         /* now we must go through each of the params. */
6168         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6169         while (phdr) {
6170                 ptype = ntohs(phdr->param_type);
6171                 plen = ntohs(phdr->param_length);
6172                 /*
6173                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6174                  * (uint32_t)ptype, (int)plen);
6175                  */
6176                 if (offset + plen > limit) {
6177                         break;
6178                 }
6179                 if (plen == 0) {
6180                         break;
6181                 }
6182 #ifdef INET
6183                 if (ptype == SCTP_IPV4_ADDRESS) {
6184                         if (stcb->asoc.scope.ipv4_addr_legal) {
6185                                 struct sctp_ipv4addr_param *p4, p4_buf;
6186
6187                                 /* ok get the v4 address and check/add */
6188                                 phdr = sctp_get_next_param(m, offset,
6189                                     (struct sctp_paramhdr *)&p4_buf,
6190                                     sizeof(p4_buf));
6191                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6192                                     phdr == NULL) {
6193                                         return (-5);
6194                                 }
6195                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6196                                 sin.sin_addr.s_addr = p4->addr;
6197                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6198                                         /* Skip multi-cast addresses */
6199                                         goto next_param;
6200                                 }
6201                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6202                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6203                                         goto next_param;
6204                                 }
6205                                 sa = (struct sockaddr *)&sin;
6206                                 inp = stcb->sctp_ep;
6207                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6208                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6209                                     dst, stcb);
6210                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6211
6212                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6213                                     inp == NULL) {
6214                                         /* we must add the source address */
6215                                         /*
6216                                          * no scope set since we have a tcb
6217                                          * already
6218                                          */
6219
6220                                         /*
6221                                          * we must validate the state again
6222                                          * here
6223                                          */
6224                         add_it_now:
6225                                         if (stcb->asoc.state == 0) {
6226                                                 /* the assoc was freed? */
6227                                                 return (-7);
6228                                         }
6229                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6230                                                 return (-8);
6231                                         }
6232                                 } else if (stcb_tmp == stcb) {
6233                                         if (stcb->asoc.state == 0) {
6234                                                 /* the assoc was freed? */
6235                                                 return (-10);
6236                                         }
6237                                         if (net != NULL) {
6238                                                 /* clear flag */
6239                                                 net->dest_state &=
6240                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6241                                         }
6242                                 } else {
6243                                         /*
6244                                          * strange, address is in another
6245                                          * assoc? straighten out locks.
6246                                          */
6247                                         if (stcb_tmp) {
6248                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6249                                                         struct mbuf *op_err;
6250                                                         char msg[SCTP_DIAG_INFO_LEN];
6251
6252                                                         /*
6253                                                          * in setup state we
6254                                                          * abort this guy
6255                                                          */
6256                                                         snprintf(msg, sizeof(msg),
6257                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6258                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6259                                                             msg);
6260                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6261                                                             stcb_tmp, op_err,
6262                                                             SCTP_SO_NOT_LOCKED);
6263                                                         goto add_it_now;
6264                                                 }
6265                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6266                                         }
6267                                         if (stcb->asoc.state == 0) {
6268                                                 /* the assoc was freed? */
6269                                                 return (-12);
6270                                         }
6271                                         return (-13);
6272                                 }
6273                         }
6274                 } else
6275 #endif
6276 #ifdef INET6
6277                 if (ptype == SCTP_IPV6_ADDRESS) {
6278                         if (stcb->asoc.scope.ipv6_addr_legal) {
6279                                 /* ok get the v6 address and check/add */
6280                                 struct sctp_ipv6addr_param *p6, p6_buf;
6281
6282                                 phdr = sctp_get_next_param(m, offset,
6283                                     (struct sctp_paramhdr *)&p6_buf,
6284                                     sizeof(p6_buf));
6285                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6286                                     phdr == NULL) {
6287                                         return (-14);
6288                                 }
6289                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6290                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6291                                     sizeof(p6->addr));
6292                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6293                                         /* Skip multi-cast addresses */
6294                                         goto next_param;
6295                                 }
6296                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6297                                         /*
6298                                          * Link local make no sense without
6299                                          * scope
6300                                          */
6301                                         goto next_param;
6302                                 }
6303                                 sa = (struct sockaddr *)&sin6;
6304                                 inp = stcb->sctp_ep;
6305                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6306                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6307                                     dst, stcb);
6308                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6309                                 if (stcb_tmp == NULL &&
6310                                     (inp == stcb->sctp_ep || inp == NULL)) {
6311                                         /*
6312                                          * we must validate the state again
6313                                          * here
6314                                          */
6315                         add_it_now6:
6316                                         if (stcb->asoc.state == 0) {
6317                                                 /* the assoc was freed? */
6318                                                 return (-16);
6319                                         }
6320                                         /*
6321                                          * we must add the address, no scope
6322                                          * set
6323                                          */
6324                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6325                                                 return (-17);
6326                                         }
6327                                 } else if (stcb_tmp == stcb) {
6328                                         /*
6329                                          * we must validate the state again
6330                                          * here
6331                                          */
6332                                         if (stcb->asoc.state == 0) {
6333                                                 /* the assoc was freed? */
6334                                                 return (-19);
6335                                         }
6336                                         if (net != NULL) {
6337                                                 /* clear flag */
6338                                                 net->dest_state &=
6339                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6340                                         }
6341                                 } else {
6342                                         /*
6343                                          * strange, address is in another
6344                                          * assoc? straighten out locks.
6345                                          */
6346                                         if (stcb_tmp) {
6347                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6348                                                         struct mbuf *op_err;
6349                                                         char msg[SCTP_DIAG_INFO_LEN];
6350
6351                                                         /*
6352                                                          * in setup state we
6353                                                          * abort this guy
6354                                                          */
6355                                                         snprintf(msg, sizeof(msg),
6356                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6357                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6358                                                             msg);
6359                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6360                                                             stcb_tmp, op_err,
6361                                                             SCTP_SO_NOT_LOCKED);
6362                                                         goto add_it_now6;
6363                                                 }
6364                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6365                                         }
6366                                         if (stcb->asoc.state == 0) {
6367                                                 /* the assoc was freed? */
6368                                                 return (-21);
6369                                         }
6370                                         return (-22);
6371                                 }
6372                         }
6373                 } else
6374 #endif
6375                 if (ptype == SCTP_ECN_CAPABLE) {
6376                         peer_supports_ecn = 1;
6377                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6378                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6379                                 struct sctp_adaptation_layer_indication ai,
6380                                                                 *aip;
6381
6382                                 phdr = sctp_get_next_param(m, offset,
6383                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6384                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6385                                 if (aip) {
6386                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6387                                         stcb->asoc.adaptation_needed = 1;
6388                                 }
6389                         }
6390                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6391                         struct sctp_asconf_addr_param lstore, *fee;
6392                         int lptype;
6393                         struct sockaddr *lsa = NULL;
6394
6395 #ifdef INET
6396                         struct sctp_asconf_addrv4_param *fii;
6397
6398 #endif
6399
6400                         if (stcb->asoc.asconf_supported == 0) {
6401                                 return (-100);
6402                         }
6403                         if (plen > sizeof(lstore)) {
6404                                 return (-23);
6405                         }
6406                         phdr = sctp_get_next_param(m, offset,
6407                             (struct sctp_paramhdr *)&lstore,
6408                             min(plen, sizeof(lstore)));
6409                         if (phdr == NULL) {
6410                                 return (-24);
6411                         }
6412                         fee = (struct sctp_asconf_addr_param *)phdr;
6413                         lptype = ntohs(fee->addrp.ph.param_type);
6414                         switch (lptype) {
6415 #ifdef INET
6416                         case SCTP_IPV4_ADDRESS:
6417                                 if (plen !=
6418                                     sizeof(struct sctp_asconf_addrv4_param)) {
6419                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6420                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6421                                             plen);
6422                                 } else {
6423                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6424                                         sin.sin_addr.s_addr = fii->addrp.addr;
6425                                         lsa = (struct sockaddr *)&sin;
6426                                 }
6427                                 break;
6428 #endif
6429 #ifdef INET6
6430                         case SCTP_IPV6_ADDRESS:
6431                                 if (plen !=
6432                                     sizeof(struct sctp_asconf_addr_param)) {
6433                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6434                                             (int)sizeof(struct sctp_asconf_addr_param),
6435                                             plen);
6436                                 } else {
6437                                         memcpy(sin6.sin6_addr.s6_addr,
6438                                             fee->addrp.addr,
6439                                             sizeof(fee->addrp.addr));
6440                                         lsa = (struct sockaddr *)&sin6;
6441                                 }
6442                                 break;
6443 #endif
6444                         default:
6445                                 break;
6446                         }
6447                         if (lsa) {
6448                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6449                         }
6450                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6451                         stcb->asoc.peer_supports_nat = 1;
6452                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6453                         /* Peer supports pr-sctp */
6454                         peer_supports_prsctp = 1;
6455                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6456                         /* A supported extension chunk */
6457                         struct sctp_supported_chunk_types_param *pr_supported;
6458                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6459                         int num_ent, i;
6460
6461                         phdr = sctp_get_next_param(m, offset,
6462                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6463                         if (phdr == NULL) {
6464                                 return (-25);
6465                         }
6466                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6467                         num_ent = plen - sizeof(struct sctp_paramhdr);
6468                         for (i = 0; i < num_ent; i++) {
6469                                 switch (pr_supported->chunk_types[i]) {
6470                                 case SCTP_ASCONF:
6471                                         peer_supports_asconf = 1;
6472                                         break;
6473                                 case SCTP_ASCONF_ACK:
6474                                         peer_supports_asconf_ack = 1;
6475                                         break;
6476                                 case SCTP_FORWARD_CUM_TSN:
6477                                         peer_supports_prsctp = 1;
6478                                         break;
6479                                 case SCTP_PACKET_DROPPED:
6480                                         peer_supports_pktdrop = 1;
6481                                         break;
6482                                 case SCTP_NR_SELECTIVE_ACK:
6483                                         peer_supports_nrsack = 1;
6484                                         break;
6485                                 case SCTP_STREAM_RESET:
6486                                         peer_supports_reconfig = 1;
6487                                         break;
6488                                 case SCTP_AUTHENTICATION:
6489                                         peer_supports_auth = 1;
6490                                         break;
6491                                 default:
6492                                         /* one I have not learned yet */
6493                                         break;
6494
6495                                 }
6496                         }
6497                 } else if (ptype == SCTP_RANDOM) {
6498                         if (plen > sizeof(random_store))
6499                                 break;
6500                         if (got_random) {
6501                                 /* already processed a RANDOM */
6502                                 goto next_param;
6503                         }
6504                         phdr = sctp_get_next_param(m, offset,
6505                             (struct sctp_paramhdr *)random_store,
6506                             min(sizeof(random_store), plen));
6507                         if (phdr == NULL)
6508                                 return (-26);
6509                         p_random = (struct sctp_auth_random *)phdr;
6510                         random_len = plen - sizeof(*p_random);
6511                         /* enforce the random length */
6512                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6513                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6514                                 return (-27);
6515                         }
6516                         got_random = 1;
6517                 } else if (ptype == SCTP_HMAC_LIST) {
6518                         uint16_t num_hmacs;
6519                         uint16_t i;
6520
6521                         if (plen > sizeof(hmacs_store))
6522                                 break;
6523                         if (got_hmacs) {
6524                                 /* already processed a HMAC list */
6525                                 goto next_param;
6526                         }
6527                         phdr = sctp_get_next_param(m, offset,
6528                             (struct sctp_paramhdr *)hmacs_store,
6529                             min(plen, sizeof(hmacs_store)));
6530                         if (phdr == NULL)
6531                                 return (-28);
6532                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6533                         hmacs_len = plen - sizeof(*hmacs);
6534                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6535                         /* validate the hmac list */
6536                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6537                                 return (-29);
6538                         }
6539                         if (stcb->asoc.peer_hmacs != NULL)
6540                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6541                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6542                         if (stcb->asoc.peer_hmacs != NULL) {
6543                                 for (i = 0; i < num_hmacs; i++) {
6544                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6545                                             ntohs(hmacs->hmac_ids[i]));
6546                                 }
6547                         }
6548                         got_hmacs = 1;
6549                 } else if (ptype == SCTP_CHUNK_LIST) {
6550                         int i;
6551
6552                         if (plen > sizeof(chunks_store))
6553                                 break;
6554                         if (got_chklist) {
6555                                 /* already processed a Chunks list */
6556                                 goto next_param;
6557                         }
6558                         phdr = sctp_get_next_param(m, offset,
6559                             (struct sctp_paramhdr *)chunks_store,
6560                             min(plen, sizeof(chunks_store)));
6561                         if (phdr == NULL)
6562                                 return (-30);
6563                         chunks = (struct sctp_auth_chunk_list *)phdr;
6564                         num_chunks = plen - sizeof(*chunks);
6565                         if (stcb->asoc.peer_auth_chunks != NULL)
6566                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6567                         else
6568                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6569                         for (i = 0; i < num_chunks; i++) {
6570                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6571                                     stcb->asoc.peer_auth_chunks);
6572                                 /* record asconf/asconf-ack if listed */
6573                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6574                                         saw_asconf = 1;
6575                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6576                                         saw_asconf_ack = 1;
6577
6578                         }
6579                         got_chklist = 1;
6580                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6581                             (ptype == SCTP_STATE_COOKIE) ||
6582                             (ptype == SCTP_UNRECOG_PARAM) ||
6583                             (ptype == SCTP_COOKIE_PRESERVE) ||
6584                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6585                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6586                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6587                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6588                     (ptype == SCTP_SUCCESS_REPORT)) {
6589                          /* don't care */ ;
6590                 } else {
6591                         if ((ptype & 0x8000) == 0x0000) {
6592                                 /*
6593                                  * must stop processing the rest of the
6594                                  * param's. Any report bits were handled
6595                                  * with the call to
6596                                  * sctp_arethere_unrecognized_parameters()
6597                                  * when the INIT or INIT-ACK was first seen.
6598                                  */
6599                                 break;
6600                         }
6601                 }
6602
6603 next_param:
6604                 offset += SCTP_SIZE32(plen);
6605                 if (offset >= limit) {
6606                         break;
6607                 }
6608                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6609                     sizeof(parm_buf));
6610         }
6611         /* Now check to see if we need to purge any addresses */
6612         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6613                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6614                     SCTP_ADDR_NOT_IN_ASSOC) {
6615                         /* This address has been removed from the asoc */
6616                         /* remove and free it */
6617                         stcb->asoc.numnets--;
6618                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6619                         sctp_free_remote_addr(net);
6620                         if (net == stcb->asoc.primary_destination) {
6621                                 stcb->asoc.primary_destination = NULL;
6622                                 sctp_select_primary_destination(stcb);
6623                         }
6624                 }
6625         }
6626         if ((stcb->asoc.ecn_supported == 1) &&
6627             (peer_supports_ecn == 0)) {
6628                 stcb->asoc.ecn_supported = 0;
6629         }
6630         if ((stcb->asoc.prsctp_supported == 1) &&
6631             (peer_supports_prsctp == 0)) {
6632                 stcb->asoc.prsctp_supported = 0;
6633         }
6634         if ((stcb->asoc.auth_supported == 1) &&
6635             ((peer_supports_auth == 0) ||
6636             (got_random == 0) || (got_hmacs == 0))) {
6637                 stcb->asoc.auth_supported = 0;
6638         }
6639         if ((stcb->asoc.asconf_supported == 1) &&
6640             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6641             (stcb->asoc.auth_supported == 0) ||
6642             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6643                 stcb->asoc.asconf_supported = 0;
6644         }
6645         if ((stcb->asoc.reconfig_supported == 1) &&
6646             (peer_supports_reconfig == 0)) {
6647                 stcb->asoc.reconfig_supported = 0;
6648         }
6649         if ((stcb->asoc.nrsack_supported == 1) &&
6650             (peer_supports_nrsack == 0)) {
6651                 stcb->asoc.nrsack_supported = 0;
6652         }
6653         if ((stcb->asoc.pktdrop_supported == 1) &&
6654             (peer_supports_pktdrop == 0)) {
6655                 stcb->asoc.pktdrop_supported = 0;
6656         }
6657         /* validate authentication required parameters */
6658         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6659                 /* peer does not support auth but sent a chunks list? */
6660                 return (-31);
6661         }
6662         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6663                 /* peer supports asconf but not auth? */
6664                 return (-32);
6665         } else if ((peer_supports_asconf == 1) &&
6666                     (peer_supports_auth == 1) &&
6667             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6668                 return (-33);
6669         }
6670         /* concatenate the full random key */
6671         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6672         if (chunks != NULL) {
6673                 keylen += sizeof(*chunks) + num_chunks;
6674         }
6675         new_key = sctp_alloc_key(keylen);
6676         if (new_key != NULL) {
6677                 /* copy in the RANDOM */
6678                 if (p_random != NULL) {
6679                         keylen = sizeof(*p_random) + random_len;
6680                         bcopy(p_random, new_key->key, keylen);
6681                 }
6682                 /* append in the AUTH chunks */
6683                 if (chunks != NULL) {
6684                         bcopy(chunks, new_key->key + keylen,
6685                             sizeof(*chunks) + num_chunks);
6686                         keylen += sizeof(*chunks) + num_chunks;
6687                 }
6688                 /* append in the HMACs */
6689                 if (hmacs != NULL) {
6690                         bcopy(hmacs, new_key->key + keylen,
6691                             sizeof(*hmacs) + hmacs_len);
6692                 }
6693         } else {
6694                 /* failed to get memory for the key */
6695                 return (-34);
6696         }
6697         if (stcb->asoc.authinfo.peer_random != NULL)
6698                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6699         stcb->asoc.authinfo.peer_random = new_key;
6700         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6701         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6702
6703         return (0);
6704 }
6705
6706 int
6707 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6708     struct sctp_nets *net)
6709 {
6710         /* make sure the requested primary address exists in the assoc */
6711         if (net == NULL && sa)
6712                 net = sctp_findnet(stcb, sa);
6713
6714         if (net == NULL) {
6715                 /* didn't find the requested primary address! */
6716                 return (-1);
6717         } else {
6718                 /* set the primary address */
6719                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6720                         /* Must be confirmed, so queue to set */
6721                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6722                         return (0);
6723                 }
6724                 stcb->asoc.primary_destination = net;
6725                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6726                         sctp_free_remote_addr(stcb->asoc.alternate);
6727                         stcb->asoc.alternate = NULL;
6728                 }
6729                 net = TAILQ_FIRST(&stcb->asoc.nets);
6730                 if (net != stcb->asoc.primary_destination) {
6731                         /*
6732                          * first one on the list is NOT the primary
6733                          * sctp_cmpaddr() is much more efficient if the
6734                          * primary is the first on the list, make it so.
6735                          */
6736                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6737                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6738                 }
6739                 return (0);
6740         }
6741 }
6742
6743 int
6744 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6745 {
6746         /*
6747          * This function serves two purposes. It will see if a TAG can be
6748          * re-used and return 1 for yes it is ok and 0 for don't use that
6749          * tag. A secondary function it will do is purge out old tags that
6750          * can be removed.
6751          */
6752         struct sctpvtaghead *chain;
6753         struct sctp_tagblock *twait_block;
6754         struct sctpasochead *head;
6755         struct sctp_tcb *stcb;
6756         int i;
6757
6758         SCTP_INP_INFO_RLOCK();
6759         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6760             SCTP_BASE_INFO(hashasocmark))];
6761         LIST_FOREACH(stcb, head, sctp_asocs) {
6762                 /*
6763                  * We choose not to lock anything here. TCB's can't be
6764                  * removed since we have the read lock, so they can't be
6765                  * freed on us, same thing for the INP. I may be wrong with
6766                  * this assumption, but we will go with it for now :-)
6767                  */
6768                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6769                         continue;
6770                 }
6771                 if (stcb->asoc.my_vtag == tag) {
6772                         /* candidate */
6773                         if (stcb->rport != rport) {
6774                                 continue;
6775                         }
6776                         if (stcb->sctp_ep->sctp_lport != lport) {
6777                                 continue;
6778                         }
6779                         /* Its a used tag set */
6780                         SCTP_INP_INFO_RUNLOCK();
6781                         return (0);
6782                 }
6783         }
6784         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6785         /* Now what about timed wait ? */
6786         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6787                 /*
6788                  * Block(s) are present, lets see if we have this tag in the
6789                  * list
6790                  */
6791                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6792                         if (twait_block->vtag_block[i].v_tag == 0) {
6793                                 /* not used */
6794                                 continue;
6795                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6796                             now->tv_sec) {
6797                                 /* Audit expires this guy */
6798                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6799                                 twait_block->vtag_block[i].v_tag = 0;
6800                                 twait_block->vtag_block[i].lport = 0;
6801                                 twait_block->vtag_block[i].rport = 0;
6802                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6803                                     (twait_block->vtag_block[i].lport == lport) &&
6804                             (twait_block->vtag_block[i].rport == rport)) {
6805                                 /* Bad tag, sorry :< */
6806                                 SCTP_INP_INFO_RUNLOCK();
6807                                 return (0);
6808                         }
6809                 }
6810         }
6811         SCTP_INP_INFO_RUNLOCK();
6812         return (1);
6813 }
6814
6815 static void
6816 sctp_drain_mbufs(struct sctp_tcb *stcb)
6817 {
6818         /*
6819          * We must hunt this association for MBUF's past the cumack (i.e.
6820          * out of order data that we can renege on).
6821          */
6822         struct sctp_association *asoc;
6823         struct sctp_tmit_chunk *chk, *nchk;
6824         uint32_t cumulative_tsn_p1;
6825         struct sctp_queued_to_read *ctl, *nctl;
6826         int cnt, strmat;
6827         uint32_t gap, i;
6828         int fnd = 0;
6829
6830         /* We look for anything larger than the cum-ack + 1 */
6831
6832         asoc = &stcb->asoc;
6833         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6834                 /* none we can reneg on. */
6835                 return;
6836         }
6837         SCTP_STAT_INCR(sctps_protocol_drains_done);
6838         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6839         cnt = 0;
6840         /* First look in the re-assembly queue */
6841         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6842                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6843                         /* Yep it is above cum-ack */
6844                         cnt++;
6845                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6846                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6847                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6848                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6849                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6850                         if (chk->data) {
6851                                 sctp_m_freem(chk->data);
6852                                 chk->data = NULL;
6853                         }
6854                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6855                 }
6856         }
6857         /* Ok that was fun, now we will drain all the inbound streams? */
6858         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6859                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6860                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6861                                 /* Yep it is above cum-ack */
6862                                 cnt++;
6863                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6864                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6865                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6866                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6867                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6868                                 if (ctl->data) {
6869                                         sctp_m_freem(ctl->data);
6870                                         ctl->data = NULL;
6871                                 }
6872                                 sctp_free_remote_addr(ctl->whoFrom);
6873                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6874                                 SCTP_DECR_READQ_COUNT();
6875                         }
6876                 }
6877         }
6878         if (cnt) {
6879                 /* We must back down to see what the new highest is */
6880                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6881                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6882                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6883                                 asoc->highest_tsn_inside_map = i;
6884                                 fnd = 1;
6885                                 break;
6886                         }
6887                 }
6888                 if (!fnd) {
6889                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6890                 }
6891                 /*
6892                  * Question, should we go through the delivery queue? The
6893                  * only reason things are on here is the app not reading OR
6894                  * a p-d-api up. An attacker COULD send enough in to
6895                  * initiate the PD-API and then send a bunch of stuff to
6896                  * other streams... these would wind up on the delivery
6897                  * queue.. and then we would not get to them. But in order
6898                  * to do this I then have to back-track and un-deliver
6899                  * sequence numbers in streams.. el-yucko. I think for now
6900                  * we will NOT look at the delivery queue and leave it to be
6901                  * something to consider later. An alternative would be to
6902                  * abort the P-D-API with a notification and then deliver
6903                  * the data.... Or another method might be to keep track of
6904                  * how many times the situation occurs and if we see a
6905                  * possible attack underway just abort the association.
6906                  */
6907 #ifdef SCTP_DEBUG
6908                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6909 #endif
6910                 /*
6911                  * Now do we need to find a new
6912                  * asoc->highest_tsn_inside_map?
6913                  */
6914                 asoc->last_revoke_count = cnt;
6915                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6916                 /* sa_ignore NO_NULL_CHK */
6917                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6918                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6919         }
6920         /*
6921          * Another issue, in un-setting the TSN's in the mapping array we
6922          * DID NOT adjust the highest_tsn marker.  This will cause one of
6923          * two things to occur. It may cause us to do extra work in checking
6924          * for our mapping array movement. More importantly it may cause us
6925          * to SACK every datagram. This may not be a bad thing though since
6926          * we will recover once we get our cum-ack above and all this stuff
6927          * we dumped recovered.
6928          */
6929 }
6930
6931 void
6932 sctp_drain()
6933 {
6934         /*
6935          * We must walk the PCB lists for ALL associations here. The system
6936          * is LOW on MBUF's and needs help. This is where reneging will
6937          * occur. We really hope this does NOT happen!
6938          */
6939         VNET_ITERATOR_DECL(vnet_iter);
6940         VNET_LIST_RLOCK_NOSLEEP();
6941         VNET_FOREACH(vnet_iter) {
6942                 CURVNET_SET(vnet_iter);
6943                 struct sctp_inpcb *inp;
6944                 struct sctp_tcb *stcb;
6945
6946                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6947                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6948 #ifdef VIMAGE
6949                         continue;
6950 #else
6951                         return;
6952 #endif
6953                 }
6954                 SCTP_INP_INFO_RLOCK();
6955                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6956                         /* For each endpoint */
6957                         SCTP_INP_RLOCK(inp);
6958                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6959                                 /* For each association */
6960                                 SCTP_TCB_LOCK(stcb);
6961                                 sctp_drain_mbufs(stcb);
6962                                 SCTP_TCB_UNLOCK(stcb);
6963                         }
6964                         SCTP_INP_RUNLOCK(inp);
6965                 }
6966                 SCTP_INP_INFO_RUNLOCK();
6967                 CURVNET_RESTORE();
6968         }
6969         VNET_LIST_RUNLOCK_NOSLEEP();
6970 }
6971
6972 /*
6973  * start a new iterator
6974  * iterates through all endpoints and associations based on the pcb_state
6975  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6976  * assocs and "ef" (optional) is executed when the iterator completes.
6977  * "inpf" (optional) is executed for each new endpoint as it is being
6978  * iterated through. inpe (optional) is called when the inp completes
6979  * its way through all the stcbs.
6980  */
6981 int
6982 sctp_initiate_iterator(inp_func inpf,
6983     asoc_func af,
6984     inp_func inpe,
6985     uint32_t pcb_state,
6986     uint32_t pcb_features,
6987     uint32_t asoc_state,
6988     void *argp,
6989     uint32_t argi,
6990     end_func ef,
6991     struct sctp_inpcb *s_inp,
6992     uint8_t chunk_output_off)
6993 {
6994         struct sctp_iterator *it = NULL;
6995
6996         if (af == NULL) {
6997                 return (-1);
6998         }
6999         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7000             SCTP_M_ITER);
7001         if (it == NULL) {
7002                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7003                 return (ENOMEM);
7004         }
7005         memset(it, 0, sizeof(*it));
7006         it->function_assoc = af;
7007         it->function_inp = inpf;
7008         if (inpf)
7009                 it->done_current_ep = 0;
7010         else
7011                 it->done_current_ep = 1;
7012         it->function_atend = ef;
7013         it->pointer = argp;
7014         it->val = argi;
7015         it->pcb_flags = pcb_state;
7016         it->pcb_features = pcb_features;
7017         it->asoc_state = asoc_state;
7018         it->function_inp_end = inpe;
7019         it->no_chunk_output = chunk_output_off;
7020         it->vn = curvnet;
7021         if (s_inp) {
7022                 /* Assume lock is held here */
7023                 it->inp = s_inp;
7024                 SCTP_INP_INCR_REF(it->inp);
7025                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7026         } else {
7027                 SCTP_INP_INFO_RLOCK();
7028                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7029                 if (it->inp) {
7030                         SCTP_INP_INCR_REF(it->inp);
7031                 }
7032                 SCTP_INP_INFO_RUNLOCK();
7033                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7034
7035         }
7036         SCTP_IPI_ITERATOR_WQ_LOCK();
7037
7038         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7039         if (sctp_it_ctl.iterator_running == 0) {
7040                 sctp_wakeup_iterator();
7041         }
7042         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7043         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7044         return (0);
7045 }