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 = (struct sockaddr_in *)&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 = (struct sockaddr_in6 *)&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 = (struct sockaddr_in *)&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 = (struct sockaddr_in6 *)&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", __FUNCTION__);
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                 if (head == NULL) {
1445                         goto null_return;
1446                 }
1447                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1448                         if (stcb->rport != rport) {
1449                                 /* remote port does not match */
1450                                 continue;
1451                         }
1452                         SCTP_TCB_LOCK(stcb);
1453                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1454                                 SCTP_TCB_UNLOCK(stcb);
1455                                 continue;
1456                         }
1457                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1458                                 SCTP_TCB_UNLOCK(stcb);
1459                                 continue;
1460                         }
1461                         /* now look at the list of remote addresses */
1462                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1463 #ifdef INVARIANTS
1464                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1465                                         panic("Corrupt net list");
1466                                 }
1467 #endif
1468                                 if (net->ro._l_addr.sa.sa_family !=
1469                                     remote->sa_family) {
1470                                         /* not the same family */
1471                                         continue;
1472                                 }
1473                                 switch (remote->sa_family) {
1474 #ifdef INET
1475                                 case AF_INET:
1476                                         {
1477                                                 struct sockaddr_in *sin,
1478                                                            *rsin;
1479
1480                                                 sin = (struct sockaddr_in *)
1481                                                     &net->ro._l_addr;
1482                                                 rsin = (struct sockaddr_in *)remote;
1483                                                 if (sin->sin_addr.s_addr ==
1484                                                     rsin->sin_addr.s_addr) {
1485                                                         /* found it */
1486                                                         if (netp != NULL) {
1487                                                                 *netp = net;
1488                                                         }
1489                                                         if (locked_tcb == NULL) {
1490                                                                 SCTP_INP_DECR_REF(inp);
1491                                                         } else if (locked_tcb != stcb) {
1492                                                                 SCTP_TCB_LOCK(locked_tcb);
1493                                                         }
1494                                                         if (locked_tcb) {
1495                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1496                                                         }
1497                                                         SCTP_INP_WUNLOCK(inp);
1498                                                         SCTP_INP_INFO_RUNLOCK();
1499                                                         return (stcb);
1500                                                 }
1501                                                 break;
1502                                         }
1503 #endif
1504 #ifdef INET6
1505                                 case AF_INET6:
1506                                         {
1507                                                 struct sockaddr_in6 *sin6,
1508                                                             *rsin6;
1509
1510                                                 sin6 = (struct sockaddr_in6 *)
1511                                                     &net->ro._l_addr;
1512                                                 rsin6 = (struct sockaddr_in6 *)remote;
1513                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1514                                                     rsin6)) {
1515                                                         /* found it */
1516                                                         if (netp != NULL) {
1517                                                                 *netp = net;
1518                                                         }
1519                                                         if (locked_tcb == NULL) {
1520                                                                 SCTP_INP_DECR_REF(inp);
1521                                                         } else if (locked_tcb != stcb) {
1522                                                                 SCTP_TCB_LOCK(locked_tcb);
1523                                                         }
1524                                                         if (locked_tcb) {
1525                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1526                                                         }
1527                                                         SCTP_INP_WUNLOCK(inp);
1528                                                         SCTP_INP_INFO_RUNLOCK();
1529                                                         return (stcb);
1530                                                 }
1531                                                 break;
1532                                         }
1533 #endif
1534                                 default:
1535                                         /* TSNH */
1536                                         break;
1537                                 }
1538                         }
1539                         SCTP_TCB_UNLOCK(stcb);
1540                 }
1541         }
1542 null_return:
1543         /* clean up for returning null */
1544         if (locked_tcb) {
1545                 SCTP_TCB_LOCK(locked_tcb);
1546                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1547         }
1548         SCTP_INP_WUNLOCK(inp);
1549         SCTP_INP_INFO_RUNLOCK();
1550         /* not found */
1551         return (NULL);
1552 }
1553
1554
1555 /*
1556  * Find an association for a specific endpoint using the association id given
1557  * out in the COMM_UP notification
1558  */
1559 struct sctp_tcb *
1560 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1561 {
1562         /*
1563          * Use my the assoc_id to find a endpoint
1564          */
1565         struct sctpasochead *head;
1566         struct sctp_tcb *stcb;
1567         uint32_t id;
1568
1569         if (inp == NULL) {
1570                 SCTP_PRINTF("TSNH ep_associd\n");
1571                 return (NULL);
1572         }
1573         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1574                 SCTP_PRINTF("TSNH ep_associd0\n");
1575                 return (NULL);
1576         }
1577         id = (uint32_t) asoc_id;
1578         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1579         if (head == NULL) {
1580                 /* invalid id TSNH */
1581                 SCTP_PRINTF("TSNH ep_associd1\n");
1582                 return (NULL);
1583         }
1584         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1585                 if (stcb->asoc.assoc_id == id) {
1586                         if (inp != stcb->sctp_ep) {
1587                                 /*
1588                                  * some other guy has the same id active (id
1589                                  * collision ??).
1590                                  */
1591                                 SCTP_PRINTF("TSNH ep_associd2\n");
1592                                 continue;
1593                         }
1594                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1595                                 continue;
1596                         }
1597                         if (want_lock) {
1598                                 SCTP_TCB_LOCK(stcb);
1599                         }
1600                         return (stcb);
1601                 }
1602         }
1603         return (NULL);
1604 }
1605
1606
1607 struct sctp_tcb *
1608 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1609 {
1610         struct sctp_tcb *stcb;
1611
1612         SCTP_INP_RLOCK(inp);
1613         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1614         SCTP_INP_RUNLOCK(inp);
1615         return (stcb);
1616 }
1617
1618
1619 /*
1620  * Endpoint probe expects that the INP_INFO is locked.
1621  */
1622 static struct sctp_inpcb *
1623 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1624     uint16_t lport, uint32_t vrf_id)
1625 {
1626         struct sctp_inpcb *inp;
1627         struct sctp_laddr *laddr;
1628
1629 #ifdef INET
1630         struct sockaddr_in *sin;
1631
1632 #endif
1633 #ifdef INET6
1634         struct sockaddr_in6 *sin6;
1635         struct sockaddr_in6 *intf_addr6;
1636
1637 #endif
1638         int fnd;
1639
1640 #ifdef INET
1641         sin = NULL;
1642 #endif
1643 #ifdef INET6
1644         sin6 = NULL;
1645 #endif
1646         switch (nam->sa_family) {
1647 #ifdef INET
1648         case AF_INET:
1649                 sin = (struct sockaddr_in *)nam;
1650                 break;
1651 #endif
1652 #ifdef INET6
1653         case AF_INET6:
1654                 sin6 = (struct sockaddr_in6 *)nam;
1655                 break;
1656 #endif
1657         default:
1658                 /* unsupported family */
1659                 return (NULL);
1660         }
1661
1662         if (head == NULL)
1663                 return (NULL);
1664
1665         LIST_FOREACH(inp, head, sctp_hash) {
1666                 SCTP_INP_RLOCK(inp);
1667                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1668                         SCTP_INP_RUNLOCK(inp);
1669                         continue;
1670                 }
1671                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1672                     (inp->sctp_lport == lport)) {
1673                         /* got it */
1674                         switch (nam->sa_family) {
1675 #ifdef INET
1676                         case AF_INET:
1677                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1678                                     SCTP_IPV6_V6ONLY(inp)) {
1679                                         /*
1680                                          * IPv4 on a IPv6 socket with ONLY
1681                                          * IPv6 set
1682                                          */
1683                                         SCTP_INP_RUNLOCK(inp);
1684                                         continue;
1685                                 }
1686                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1687                                     &sin->sin_addr) != 0) {
1688                                         SCTP_INP_RUNLOCK(inp);
1689                                         continue;
1690                                 }
1691                                 break;
1692 #endif
1693 #ifdef INET6
1694                         case AF_INET6:
1695                                 /*
1696                                  * A V6 address and the endpoint is NOT
1697                                  * bound V6
1698                                  */
1699                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1700                                         SCTP_INP_RUNLOCK(inp);
1701                                         continue;
1702                                 }
1703                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1704                                     &sin6->sin6_addr) != 0) {
1705                                         SCTP_INP_RUNLOCK(inp);
1706                                         continue;
1707                                 }
1708                                 break;
1709 #endif
1710                         default:
1711                                 break;
1712                         }
1713                         /* does a VRF id match? */
1714                         fnd = 0;
1715                         if (inp->def_vrf_id == vrf_id)
1716                                 fnd = 1;
1717
1718                         SCTP_INP_RUNLOCK(inp);
1719                         if (!fnd)
1720                                 continue;
1721                         return (inp);
1722                 }
1723                 SCTP_INP_RUNLOCK(inp);
1724         }
1725         switch (nam->sa_family) {
1726 #ifdef INET
1727         case AF_INET:
1728                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1729                         /* Can't hunt for one that has no address specified */
1730                         return (NULL);
1731                 }
1732                 break;
1733 #endif
1734 #ifdef INET6
1735         case AF_INET6:
1736                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1737                         /* Can't hunt for one that has no address specified */
1738                         return (NULL);
1739                 }
1740                 break;
1741 #endif
1742         default:
1743                 break;
1744         }
1745         /*
1746          * ok, not bound to all so see if we can find a EP bound to this
1747          * address.
1748          */
1749         LIST_FOREACH(inp, head, sctp_hash) {
1750                 SCTP_INP_RLOCK(inp);
1751                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1752                         SCTP_INP_RUNLOCK(inp);
1753                         continue;
1754                 }
1755                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1756                         SCTP_INP_RUNLOCK(inp);
1757                         continue;
1758                 }
1759                 /*
1760                  * Ok this could be a likely candidate, look at all of its
1761                  * addresses
1762                  */
1763                 if (inp->sctp_lport != lport) {
1764                         SCTP_INP_RUNLOCK(inp);
1765                         continue;
1766                 }
1767                 /* does a VRF id match? */
1768                 fnd = 0;
1769                 if (inp->def_vrf_id == vrf_id)
1770                         fnd = 1;
1771
1772                 if (!fnd) {
1773                         SCTP_INP_RUNLOCK(inp);
1774                         continue;
1775                 }
1776                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1777                         if (laddr->ifa == NULL) {
1778                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1779                                     __FUNCTION__);
1780                                 continue;
1781                         }
1782                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1783                             (void *)laddr->ifa);
1784                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1785                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1786                                 continue;
1787                         }
1788                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1789                                 /* possible, see if it matches */
1790                                 switch (nam->sa_family) {
1791 #ifdef INET
1792                                 case AF_INET:
1793                                         if (sin->sin_addr.s_addr ==
1794                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1795                                                 SCTP_INP_RUNLOCK(inp);
1796                                                 return (inp);
1797                                         }
1798                                         break;
1799 #endif
1800 #ifdef INET6
1801                                 case AF_INET6:
1802                                         intf_addr6 = &laddr->ifa->address.sin6;
1803                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1804                                             intf_addr6)) {
1805                                                 SCTP_INP_RUNLOCK(inp);
1806                                                 return (inp);
1807                                         }
1808                                         break;
1809 #endif
1810                                 }
1811                         }
1812                 }
1813                 SCTP_INP_RUNLOCK(inp);
1814         }
1815         return (NULL);
1816 }
1817
1818
1819 static struct sctp_inpcb *
1820 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1821 {
1822         struct sctppcbhead *head;
1823         struct sctp_inpcb *t_inp;
1824         int fnd;
1825
1826         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1827             SCTP_BASE_INFO(hashmark))];
1828         LIST_FOREACH(t_inp, head, sctp_hash) {
1829                 if (t_inp->sctp_lport != lport) {
1830                         continue;
1831                 }
1832                 /* is it in the VRF in question */
1833                 fnd = 0;
1834                 if (t_inp->def_vrf_id == vrf_id)
1835                         fnd = 1;
1836                 if (!fnd)
1837                         continue;
1838
1839                 /* This one is in use. */
1840                 /* check the v6/v4 binding issue */
1841                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1842                     SCTP_IPV6_V6ONLY(t_inp)) {
1843                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1844                                 /* collision in V6 space */
1845                                 return (t_inp);
1846                         } else {
1847                                 /* inp is BOUND_V4 no conflict */
1848                                 continue;
1849                         }
1850                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1851                         /* t_inp is bound v4 and v6, conflict always */
1852                         return (t_inp);
1853                 } else {
1854                         /* t_inp is bound only V4 */
1855                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1856                             SCTP_IPV6_V6ONLY(inp)) {
1857                                 /* no conflict */
1858                                 continue;
1859                         }
1860                         /* else fall through to conflict */
1861                 }
1862                 return (t_inp);
1863         }
1864         return (NULL);
1865 }
1866
1867
1868 int
1869 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1870 {
1871         /* For 1-2-1 with port reuse */
1872         struct sctppcbhead *head;
1873         struct sctp_inpcb *tinp;
1874
1875         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1876                 /* only works with port reuse on */
1877                 return (-1);
1878         }
1879         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1880                 return (0);
1881         }
1882         SCTP_INP_RUNLOCK(inp);
1883         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1884             SCTP_BASE_INFO(hashmark))];
1885         /* Kick out all non-listeners to the TCP hash */
1886         LIST_FOREACH(tinp, head, sctp_hash) {
1887                 if (tinp->sctp_lport != inp->sctp_lport) {
1888                         continue;
1889                 }
1890                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1891                         continue;
1892                 }
1893                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1894                         continue;
1895                 }
1896                 if (tinp->sctp_socket->so_qlimit) {
1897                         continue;
1898                 }
1899                 SCTP_INP_WLOCK(tinp);
1900                 LIST_REMOVE(tinp, sctp_hash);
1901                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1902                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1903                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1904                 SCTP_INP_WUNLOCK(tinp);
1905         }
1906         SCTP_INP_WLOCK(inp);
1907         /* Pull from where he was */
1908         LIST_REMOVE(inp, sctp_hash);
1909         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1910         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1911         LIST_INSERT_HEAD(head, inp, sctp_hash);
1912         SCTP_INP_WUNLOCK(inp);
1913         SCTP_INP_RLOCK(inp);
1914         return (0);
1915 }
1916
1917
1918 struct sctp_inpcb *
1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1920     uint32_t vrf_id)
1921 {
1922         /*
1923          * First we check the hash table to see if someone has this port
1924          * bound with just the port.
1925          */
1926         struct sctp_inpcb *inp;
1927         struct sctppcbhead *head;
1928         int lport;
1929         unsigned int i;
1930
1931 #ifdef INET
1932         struct sockaddr_in *sin;
1933
1934 #endif
1935 #ifdef INET6
1936         struct sockaddr_in6 *sin6;
1937
1938 #endif
1939
1940         switch (nam->sa_family) {
1941 #ifdef INET
1942         case AF_INET:
1943                 sin = (struct sockaddr_in *)nam;
1944                 lport = sin->sin_port;
1945                 break;
1946 #endif
1947 #ifdef INET6
1948         case AF_INET6:
1949                 sin6 = (struct sockaddr_in6 *)nam;
1950                 lport = sin6->sin6_port;
1951                 break;
1952 #endif
1953         default:
1954                 return (NULL);
1955         }
1956         /*
1957          * I could cheat here and just cast to one of the types but we will
1958          * do it right. It also provides the check against an Unsupported
1959          * type too.
1960          */
1961         /* Find the head of the ALLADDR chain */
1962         if (have_lock == 0) {
1963                 SCTP_INP_INFO_RLOCK();
1964         }
1965         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1966             SCTP_BASE_INFO(hashmark))];
1967         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1968
1969         /*
1970          * If the TCP model exists it could be that the main listening
1971          * endpoint is gone but there still exists a connected socket for
1972          * this guy. If so we can return the first one that we find. This
1973          * may NOT be the correct one so the caller should be wary on the
1974          * returned INP. Currently the only caller that sets find_tcp_pool
1975          * is in bindx where we are verifying that a user CAN bind the
1976          * address. He either has bound it already, or someone else has, or
1977          * its open to bind, so this is good enough.
1978          */
1979         if (inp == NULL && find_tcp_pool) {
1980                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1981                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1982                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1983                         if (inp) {
1984                                 break;
1985                         }
1986                 }
1987         }
1988         if (inp) {
1989                 SCTP_INP_INCR_REF(inp);
1990         }
1991         if (have_lock == 0) {
1992                 SCTP_INP_INFO_RUNLOCK();
1993         }
1994         return (inp);
1995 }
1996
1997
1998 /*
1999  * Find an association for an endpoint with the pointer to whom you want to
2000  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2001  * need to change the *to to some other struct like a mbuf...
2002  */
2003 struct sctp_tcb *
2004 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2005     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2006     uint32_t vrf_id)
2007 {
2008         struct sctp_inpcb *inp = NULL;
2009         struct sctp_tcb *stcb;
2010
2011         SCTP_INP_INFO_RLOCK();
2012         if (find_tcp_pool) {
2013                 if (inp_p != NULL) {
2014                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2015                             vrf_id);
2016                 } else {
2017                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2018                             vrf_id);
2019                 }
2020                 if (stcb != NULL) {
2021                         SCTP_INP_INFO_RUNLOCK();
2022                         return (stcb);
2023                 }
2024         }
2025         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2026         if (inp_p != NULL) {
2027                 *inp_p = inp;
2028         }
2029         SCTP_INP_INFO_RUNLOCK();
2030         if (inp == NULL) {
2031                 return (NULL);
2032         }
2033         /*
2034          * ok, we have an endpoint, now lets find the assoc for it (if any)
2035          * we now place the source address or from in the to of the find
2036          * endpoint call. Since in reality this chain is used from the
2037          * inbound packet side.
2038          */
2039         if (inp_p != NULL) {
2040                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2041                     NULL);
2042         } else {
2043                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2044                     NULL);
2045         }
2046         return (stcb);
2047 }
2048
2049
2050 /*
2051  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2052  * find all addresses that the sender has specified in any address list. Each
2053  * address will be used to lookup the TCB and see if one exits.
2054  */
2055 static struct sctp_tcb *
2056 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2057     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2058     struct sockaddr *dst)
2059 {
2060         struct sctp_paramhdr *phdr, parm_buf;
2061
2062 #if defined(INET) || defined(INET6)
2063         struct sctp_tcb *stcb;
2064         uint16_t ptype;
2065
2066 #endif
2067         uint16_t plen;
2068
2069 #ifdef INET
2070         struct sockaddr_in sin4;
2071
2072 #endif
2073 #ifdef INET6
2074         struct sockaddr_in6 sin6;
2075
2076 #endif
2077
2078 #ifdef INET
2079         memset(&sin4, 0, sizeof(sin4));
2080         sin4.sin_len = sizeof(sin4);
2081         sin4.sin_family = AF_INET;
2082         sin4.sin_port = sh->src_port;
2083 #endif
2084 #ifdef INET6
2085         memset(&sin6, 0, sizeof(sin6));
2086         sin6.sin6_len = sizeof(sin6);
2087         sin6.sin6_family = AF_INET6;
2088         sin6.sin6_port = sh->src_port;
2089 #endif
2090
2091         offset += sizeof(struct sctp_init_chunk);
2092
2093         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2094         while (phdr != NULL) {
2095                 /* now we must see if we want the parameter */
2096 #if defined(INET) || defined(INET6)
2097                 ptype = ntohs(phdr->param_type);
2098 #endif
2099                 plen = ntohs(phdr->param_length);
2100                 if (plen == 0) {
2101                         break;
2102                 }
2103 #ifdef INET
2104                 if (ptype == SCTP_IPV4_ADDRESS &&
2105                     plen == sizeof(struct sctp_ipv4addr_param)) {
2106                         /* Get the rest of the address */
2107                         struct sctp_ipv4addr_param ip4_parm, *p4;
2108
2109                         phdr = sctp_get_next_param(m, offset,
2110                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2111                         if (phdr == NULL) {
2112                                 return (NULL);
2113                         }
2114                         p4 = (struct sctp_ipv4addr_param *)phdr;
2115                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2116                         /* look it up */
2117                         stcb = sctp_findassociation_ep_addr(inp_p,
2118                             (struct sockaddr *)&sin4, netp, dst, NULL);
2119                         if (stcb != NULL) {
2120                                 return (stcb);
2121                         }
2122                 }
2123 #endif
2124 #ifdef INET6
2125                 if (ptype == SCTP_IPV6_ADDRESS &&
2126                     plen == sizeof(struct sctp_ipv6addr_param)) {
2127                         /* Get the rest of the address */
2128                         struct sctp_ipv6addr_param ip6_parm, *p6;
2129
2130                         phdr = sctp_get_next_param(m, offset,
2131                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2132                         if (phdr == NULL) {
2133                                 return (NULL);
2134                         }
2135                         p6 = (struct sctp_ipv6addr_param *)phdr;
2136                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2137                         /* look it up */
2138                         stcb = sctp_findassociation_ep_addr(inp_p,
2139                             (struct sockaddr *)&sin6, netp, dst, NULL);
2140                         if (stcb != NULL) {
2141                                 return (stcb);
2142                         }
2143                 }
2144 #endif
2145                 offset += SCTP_SIZE32(plen);
2146                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2147                     sizeof(parm_buf));
2148         }
2149         return (NULL);
2150 }
2151
2152 static struct sctp_tcb *
2153 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2154     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2155     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2156 {
2157         /*
2158          * Use my vtag to hash. If we find it we then verify the source addr
2159          * is in the assoc. If all goes well we save a bit on rec of a
2160          * packet.
2161          */
2162         struct sctpasochead *head;
2163         struct sctp_nets *net;
2164         struct sctp_tcb *stcb;
2165
2166         SCTP_INP_INFO_RLOCK();
2167         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2168             SCTP_BASE_INFO(hashasocmark))];
2169         if (head == NULL) {
2170                 /* invalid vtag */
2171                 SCTP_INP_INFO_RUNLOCK();
2172                 return (NULL);
2173         }
2174         LIST_FOREACH(stcb, head, sctp_asocs) {
2175                 SCTP_INP_RLOCK(stcb->sctp_ep);
2176                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2177                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2178                         continue;
2179                 }
2180                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2181                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2182                         continue;
2183                 }
2184                 SCTP_TCB_LOCK(stcb);
2185                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2186                 if (stcb->asoc.my_vtag == vtag) {
2187                         /* candidate */
2188                         if (stcb->rport != rport) {
2189                                 SCTP_TCB_UNLOCK(stcb);
2190                                 continue;
2191                         }
2192                         if (stcb->sctp_ep->sctp_lport != lport) {
2193                                 SCTP_TCB_UNLOCK(stcb);
2194                                 continue;
2195                         }
2196                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2197                                 SCTP_TCB_UNLOCK(stcb);
2198                                 continue;
2199                         }
2200                         /* RRS:Need toaddr check here */
2201                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2202                                 /* Endpoint does not own this address */
2203                                 SCTP_TCB_UNLOCK(stcb);
2204                                 continue;
2205                         }
2206                         if (remote_tag) {
2207                                 /*
2208                                  * If we have both vtags that's all we match
2209                                  * on
2210                                  */
2211                                 if (stcb->asoc.peer_vtag == remote_tag) {
2212                                         /*
2213                                          * If both tags match we consider it
2214                                          * conclusive and check NO
2215                                          * source/destination addresses
2216                                          */
2217                                         goto conclusive;
2218                                 }
2219                         }
2220                         if (skip_src_check) {
2221                 conclusive:
2222                                 if (from) {
2223                                         *netp = sctp_findnet(stcb, from);
2224                                 } else {
2225                                         *netp = NULL;   /* unknown */
2226                                 }
2227                                 if (inp_p)
2228                                         *inp_p = stcb->sctp_ep;
2229                                 SCTP_INP_INFO_RUNLOCK();
2230                                 return (stcb);
2231                         }
2232                         net = sctp_findnet(stcb, from);
2233                         if (net) {
2234                                 /* yep its him. */
2235                                 *netp = net;
2236                                 SCTP_STAT_INCR(sctps_vtagexpress);
2237                                 *inp_p = stcb->sctp_ep;
2238                                 SCTP_INP_INFO_RUNLOCK();
2239                                 return (stcb);
2240                         } else {
2241                                 /*
2242                                  * not him, this should only happen in rare
2243                                  * cases so I peg it.
2244                                  */
2245                                 SCTP_STAT_INCR(sctps_vtagbogus);
2246                         }
2247                 }
2248                 SCTP_TCB_UNLOCK(stcb);
2249         }
2250         SCTP_INP_INFO_RUNLOCK();
2251         return (NULL);
2252 }
2253
2254
2255 /*
2256  * Find an association with the pointer to the inbound IP packet. This can be
2257  * a IPv4 or IPv6 packet.
2258  */
2259 struct sctp_tcb *
2260 sctp_findassociation_addr(struct mbuf *m, int offset,
2261     struct sockaddr *src, struct sockaddr *dst,
2262     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2263     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2264 {
2265         int find_tcp_pool;
2266         struct sctp_tcb *stcb;
2267         struct sctp_inpcb *inp;
2268
2269         if (sh->v_tag) {
2270                 /* we only go down this path if vtag is non-zero */
2271                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2272                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2273                 if (stcb) {
2274                         return (stcb);
2275                 }
2276         }
2277         find_tcp_pool = 0;
2278         if ((ch->chunk_type != SCTP_INITIATION) &&
2279             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2280             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2281             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2282                 /* Other chunk types go to the tcp pool. */
2283                 find_tcp_pool = 1;
2284         }
2285         if (inp_p) {
2286                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2287                     find_tcp_pool, vrf_id);
2288                 inp = *inp_p;
2289         } else {
2290                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2291                     find_tcp_pool, vrf_id);
2292         }
2293         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2294         if (stcb == NULL && inp) {
2295                 /* Found a EP but not this address */
2296                 if ((ch->chunk_type == SCTP_INITIATION) ||
2297                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2298                         /*-
2299                          * special hook, we do NOT return linp or an
2300                          * association that is linked to an existing
2301                          * association that is under the TCP pool (i.e. no
2302                          * listener exists). The endpoint finding routine
2303                          * will always find a listener before examining the
2304                          * TCP pool.
2305                          */
2306                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2307                                 if (inp_p) {
2308                                         *inp_p = NULL;
2309                                 }
2310                                 return (NULL);
2311                         }
2312                         stcb = sctp_findassociation_special_addr(m,
2313                             offset, sh, &inp, netp, dst);
2314                         if (inp_p != NULL) {
2315                                 *inp_p = inp;
2316                         }
2317                 }
2318         }
2319         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2320         return (stcb);
2321 }
2322
2323 /*
2324  * lookup an association by an ASCONF lookup address.
2325  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2326  */
2327 struct sctp_tcb *
2328 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2329     struct sockaddr *dst, struct sctphdr *sh,
2330     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2331 {
2332         struct sctp_tcb *stcb;
2333         struct sockaddr_storage remote_store;
2334         struct sctp_paramhdr parm_buf, *phdr;
2335         int ptype;
2336         int zero_address = 0;
2337
2338 #ifdef INET
2339         struct sockaddr_in *sin;
2340
2341 #endif
2342 #ifdef INET6
2343         struct sockaddr_in6 *sin6;
2344
2345 #endif
2346
2347         memset(&remote_store, 0, sizeof(remote_store));
2348         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2349             &parm_buf, sizeof(struct sctp_paramhdr));
2350         if (phdr == NULL) {
2351                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2352                     __FUNCTION__);
2353                 return NULL;
2354         }
2355         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2356         /* get the correlation address */
2357         switch (ptype) {
2358 #ifdef INET6
2359         case SCTP_IPV6_ADDRESS:
2360                 {
2361                         /* ipv6 address param */
2362                         struct sctp_ipv6addr_param *p6, p6_buf;
2363
2364                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2365                                 return NULL;
2366                         }
2367                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2368                             offset + sizeof(struct sctp_asconf_chunk),
2369                             &p6_buf.ph, sizeof(*p6));
2370                         if (p6 == NULL) {
2371                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2372                                     __FUNCTION__);
2373                                 return (NULL);
2374                         }
2375                         sin6 = (struct sockaddr_in6 *)&remote_store;
2376                         sin6->sin6_family = AF_INET6;
2377                         sin6->sin6_len = sizeof(*sin6);
2378                         sin6->sin6_port = sh->src_port;
2379                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2380                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2381                                 zero_address = 1;
2382                         break;
2383                 }
2384 #endif
2385 #ifdef INET
2386         case SCTP_IPV4_ADDRESS:
2387                 {
2388                         /* ipv4 address param */
2389                         struct sctp_ipv4addr_param *p4, p4_buf;
2390
2391                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2392                                 return NULL;
2393                         }
2394                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2395                             offset + sizeof(struct sctp_asconf_chunk),
2396                             &p4_buf.ph, sizeof(*p4));
2397                         if (p4 == NULL) {
2398                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2399                                     __FUNCTION__);
2400                                 return (NULL);
2401                         }
2402                         sin = (struct sockaddr_in *)&remote_store;
2403                         sin->sin_family = AF_INET;
2404                         sin->sin_len = sizeof(*sin);
2405                         sin->sin_port = sh->src_port;
2406                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2407                         if (sin->sin_addr.s_addr == INADDR_ANY)
2408                                 zero_address = 1;
2409                         break;
2410                 }
2411 #endif
2412         default:
2413                 /* invalid address param type */
2414                 return NULL;
2415         }
2416
2417         if (zero_address) {
2418                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2419                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2420                 if (stcb != NULL) {
2421                         SCTP_INP_DECR_REF(*inp_p);
2422                 }
2423         } else {
2424                 stcb = sctp_findassociation_ep_addr(inp_p,
2425                     (struct sockaddr *)&remote_store, netp,
2426                     dst, NULL);
2427         }
2428         return (stcb);
2429 }
2430
2431
2432 /*
2433  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2434  * addresses. This way if we don't get a bind we by default pick a ephemeral
2435  * port with all addresses bound.
2436  */
2437 int
2438 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2439 {
2440         /*
2441          * we get called when a new endpoint starts up. We need to allocate
2442          * the sctp_inpcb structure from the zone and init it. Mark it as
2443          * unbound and find a port that we can use as an ephemeral with
2444          * INADDR_ANY. If the user binds later no problem we can then add in
2445          * the specific addresses. And setup the default parameters for the
2446          * EP.
2447          */
2448         int i, error;
2449         struct sctp_inpcb *inp;
2450         struct sctp_pcb *m;
2451         struct timeval time;
2452         sctp_sharedkey_t *null_key;
2453
2454         error = 0;
2455
2456         SCTP_INP_INFO_WLOCK();
2457         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2458         if (inp == NULL) {
2459                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2460                 SCTP_INP_INFO_WUNLOCK();
2461                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2462                 return (ENOBUFS);
2463         }
2464         /* zap it */
2465         bzero(inp, sizeof(*inp));
2466
2467         /* bump generations */
2468         /* setup socket pointers */
2469         inp->sctp_socket = so;
2470         inp->ip_inp.inp.inp_socket = so;
2471         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2472 #ifdef INET6
2473         if (INP_SOCKAF(so) == AF_INET6) {
2474                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2475                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2476                 }
2477                 if (MODULE_GLOBAL(ip6_v6only)) {
2478                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2479                 }
2480         }
2481 #endif
2482         inp->sctp_associd_counter = 1;
2483         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2484         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2485         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2486         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2487         /* init the small hash table we use to track asocid <-> tcb */
2488         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2489         if (inp->sctp_asocidhash == NULL) {
2490                 crfree(inp->ip_inp.inp.inp_cred);
2491                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2492                 SCTP_INP_INFO_WUNLOCK();
2493                 return (ENOBUFS);
2494         }
2495 #ifdef IPSEC
2496         {
2497                 struct inpcbpolicy *pcb_sp = NULL;
2498
2499                 error = ipsec_init_policy(so, &pcb_sp);
2500                 /* Arrange to share the policy */
2501                 inp->ip_inp.inp.inp_sp = pcb_sp;
2502                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2503         }
2504         if (error != 0) {
2505                 crfree(inp->ip_inp.inp.inp_cred);
2506                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2507                 SCTP_INP_INFO_WUNLOCK();
2508                 return error;
2509         }
2510 #endif                          /* IPSEC */
2511         SCTP_INCR_EP_COUNT();
2512         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2513         SCTP_INP_INFO_WUNLOCK();
2514
2515         so->so_pcb = (caddr_t)inp;
2516
2517         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2518                 /* UDP style socket */
2519                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2520                     SCTP_PCB_FLAGS_UNBOUND);
2521                 /* Be sure it is NON-BLOCKING IO for UDP */
2522                 /* SCTP_SET_SO_NBIO(so); */
2523         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2524                 /* TCP style socket */
2525                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2526                     SCTP_PCB_FLAGS_UNBOUND);
2527                 /* Be sure we have blocking IO by default */
2528                 SCTP_CLEAR_SO_NBIO(so);
2529         } else {
2530                 /*
2531                  * unsupported socket type (RAW, etc)- in case we missed it
2532                  * in protosw
2533                  */
2534                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2535                 so->so_pcb = NULL;
2536                 crfree(inp->ip_inp.inp.inp_cred);
2537                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2538                 return (EOPNOTSUPP);
2539         }
2540         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2541                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2542                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2543         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2544                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2545                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2546         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2547                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2548                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2549         }
2550         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2551             &inp->sctp_hashmark);
2552         if (inp->sctp_tcbhash == NULL) {
2553                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2554                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2555                 so->so_pcb = NULL;
2556                 crfree(inp->ip_inp.inp.inp_cred);
2557                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2558                 return (ENOBUFS);
2559         }
2560         inp->def_vrf_id = vrf_id;
2561
2562         SCTP_INP_INFO_WLOCK();
2563         SCTP_INP_LOCK_INIT(inp);
2564         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2565         SCTP_INP_READ_INIT(inp);
2566         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2567         /* lock the new ep */
2568         SCTP_INP_WLOCK(inp);
2569
2570         /* add it to the info area */
2571         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2572         SCTP_INP_INFO_WUNLOCK();
2573
2574         TAILQ_INIT(&inp->read_queue);
2575         LIST_INIT(&inp->sctp_addr_list);
2576
2577         LIST_INIT(&inp->sctp_asoc_list);
2578
2579 #ifdef SCTP_TRACK_FREED_ASOCS
2580         /* TEMP CODE */
2581         LIST_INIT(&inp->sctp_asoc_free_list);
2582 #endif
2583         /* Init the timer structure for signature change */
2584         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2585         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2586
2587         /* now init the actual endpoint default data */
2588         m = &inp->sctp_ep;
2589
2590         /* setup the base timeout information */
2591         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2592         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2593         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2594         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2595         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2596         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2597         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2598         /* all max/min max are in ms */
2599         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2600         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2601         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2602         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2603         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2604         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2605         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2606         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2607         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2608         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2609         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2610         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2611         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2612
2613         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2614         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2615         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2616         /* number of streams to pre-open on a association */
2617         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2618
2619         /* Add adaptation cookie */
2620         m->adaptation_layer_indicator = 0;
2621         m->adaptation_layer_indicator_provided = 0;
2622
2623         /* seed random number generator */
2624         m->random_counter = 1;
2625         m->store_at = SCTP_SIGNATURE_SIZE;
2626         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2627         sctp_fill_random_store(m);
2628
2629         /* Minimum cookie size */
2630         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2631             sizeof(struct sctp_state_cookie);
2632         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2633
2634         /* Setup the initial secret */
2635         (void)SCTP_GETTIME_TIMEVAL(&time);
2636         m->time_of_secret_change = time.tv_sec;
2637
2638         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2639                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2640         }
2641         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2642
2643         /* How long is a cookie good for ? */
2644         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2645         /*
2646          * Initialize authentication parameters
2647          */
2648         m->local_hmacs = sctp_default_supported_hmaclist();
2649         m->local_auth_chunks = sctp_alloc_chunklist();
2650         m->default_dscp = 0;
2651 #ifdef INET6
2652         m->default_flowlabel = 0;
2653 #endif
2654         m->port = 0;            /* encapsulation disabled by default */
2655         sctp_auth_set_default_chunks(m->local_auth_chunks);
2656         LIST_INIT(&m->shared_keys);
2657         /* add default NULL key as key id 0 */
2658         null_key = sctp_alloc_sharedkey();
2659         sctp_insert_sharedkey(&m->shared_keys, null_key);
2660         SCTP_INP_WUNLOCK(inp);
2661 #ifdef SCTP_LOG_CLOSING
2662         sctp_log_closing(inp, NULL, 12);
2663 #endif
2664         return (error);
2665 }
2666
2667
2668 void
2669 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2670     struct sctp_tcb *stcb)
2671 {
2672         struct sctp_nets *net;
2673         uint16_t lport, rport;
2674         struct sctppcbhead *head;
2675         struct sctp_laddr *laddr, *oladdr;
2676
2677         atomic_add_int(&stcb->asoc.refcnt, 1);
2678         SCTP_TCB_UNLOCK(stcb);
2679         SCTP_INP_INFO_WLOCK();
2680         SCTP_INP_WLOCK(old_inp);
2681         SCTP_INP_WLOCK(new_inp);
2682         SCTP_TCB_LOCK(stcb);
2683         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2684
2685         new_inp->sctp_ep.time_of_secret_change =
2686             old_inp->sctp_ep.time_of_secret_change;
2687         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2688             sizeof(old_inp->sctp_ep.secret_key));
2689         new_inp->sctp_ep.current_secret_number =
2690             old_inp->sctp_ep.current_secret_number;
2691         new_inp->sctp_ep.last_secret_number =
2692             old_inp->sctp_ep.last_secret_number;
2693         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2694
2695         /* make it so new data pours into the new socket */
2696         stcb->sctp_socket = new_inp->sctp_socket;
2697         stcb->sctp_ep = new_inp;
2698
2699         /* Copy the port across */
2700         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2701         rport = stcb->rport;
2702         /* Pull the tcb from the old association */
2703         LIST_REMOVE(stcb, sctp_tcbhash);
2704         LIST_REMOVE(stcb, sctp_tcblist);
2705         if (stcb->asoc.in_asocid_hash) {
2706                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2707         }
2708         /* Now insert the new_inp into the TCP connected hash */
2709         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2710
2711         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2712         /* Its safe to access */
2713         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2714
2715         /* Now move the tcb into the endpoint list */
2716         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2717         /*
2718          * Question, do we even need to worry about the ep-hash since we
2719          * only have one connection? Probably not :> so lets get rid of it
2720          * and not suck up any kernel memory in that.
2721          */
2722         if (stcb->asoc.in_asocid_hash) {
2723                 struct sctpasochead *lhd;
2724
2725                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2726                     new_inp->hashasocidmark)];
2727                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2728         }
2729         /* Ok. Let's restart timer. */
2730         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2731                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2732                     stcb, net);
2733         }
2734
2735         SCTP_INP_INFO_WUNLOCK();
2736         if (new_inp->sctp_tcbhash != NULL) {
2737                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2738                 new_inp->sctp_tcbhash = NULL;
2739         }
2740         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2741                 /* Subset bound, so copy in the laddr list from the old_inp */
2742                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2743                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2744                         if (laddr == NULL) {
2745                                 /*
2746                                  * Gak, what can we do? This assoc is really
2747                                  * HOSED. We probably should send an abort
2748                                  * here.
2749                                  */
2750                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2751                                 continue;
2752                         }
2753                         SCTP_INCR_LADDR_COUNT();
2754                         bzero(laddr, sizeof(*laddr));
2755                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2756                         laddr->ifa = oladdr->ifa;
2757                         atomic_add_int(&laddr->ifa->refcount, 1);
2758                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2759                             sctp_nxt_addr);
2760                         new_inp->laddr_count++;
2761                         if (oladdr == stcb->asoc.last_used_address) {
2762                                 stcb->asoc.last_used_address = laddr;
2763                         }
2764                 }
2765         }
2766         /*
2767          * Now any running timers need to be adjusted since we really don't
2768          * care if they are running or not just blast in the new_inp into
2769          * all of them.
2770          */
2771
2772         stcb->asoc.dack_timer.ep = (void *)new_inp;
2773         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2774         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2775         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2776         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2777         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2778         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2779         /* now what about the nets? */
2780         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2781                 net->pmtu_timer.ep = (void *)new_inp;
2782                 net->hb_timer.ep = (void *)new_inp;
2783                 net->rxt_timer.ep = (void *)new_inp;
2784         }
2785         SCTP_INP_WUNLOCK(new_inp);
2786         SCTP_INP_WUNLOCK(old_inp);
2787 }
2788
2789
2790
2791
2792 /* sctp_ifap is used to bypass normal local address validation checks */
2793 int
2794 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2795     struct sctp_ifa *sctp_ifap, struct thread *p)
2796 {
2797         /* bind a ep to a socket address */
2798         struct sctppcbhead *head;
2799         struct sctp_inpcb *inp, *inp_tmp;
2800         struct inpcb *ip_inp;
2801         int port_reuse_active = 0;
2802         int bindall;
2803         uint16_t lport;
2804         int error;
2805         uint32_t vrf_id;
2806
2807         lport = 0;
2808         bindall = 1;
2809         inp = (struct sctp_inpcb *)so->so_pcb;
2810         ip_inp = (struct inpcb *)so->so_pcb;
2811 #ifdef SCTP_DEBUG
2812         if (addr) {
2813                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2814                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2815                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2816                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2817         }
2818 #endif
2819         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2820                 /* already did a bind, subsequent binds NOT allowed ! */
2821                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2822                 return (EINVAL);
2823         }
2824 #ifdef INVARIANTS
2825         if (p == NULL)
2826                 panic("null proc/thread");
2827 #endif
2828         if (addr != NULL) {
2829                 switch (addr->sa_family) {
2830 #ifdef INET
2831                 case AF_INET:
2832                         {
2833                                 struct sockaddr_in *sin;
2834
2835                                 /* IPV6_V6ONLY socket? */
2836                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2837                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2838                                         return (EINVAL);
2839                                 }
2840                                 if (addr->sa_len != sizeof(*sin)) {
2841                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2842                                         return (EINVAL);
2843                                 }
2844                                 sin = (struct sockaddr_in *)addr;
2845                                 lport = sin->sin_port;
2846                                 /*
2847                                  * For LOOPBACK the prison_local_ip4() call
2848                                  * will transmute the ip address to the
2849                                  * proper value.
2850                                  */
2851                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2852                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2853                                         return (error);
2854                                 }
2855                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2856                                         bindall = 0;
2857                                 }
2858                                 break;
2859                         }
2860 #endif
2861 #ifdef INET6
2862                 case AF_INET6:
2863                         {
2864                                 /*
2865                                  * Only for pure IPv6 Address. (No IPv4
2866                                  * Mapped!)
2867                                  */
2868                                 struct sockaddr_in6 *sin6;
2869
2870                                 sin6 = (struct sockaddr_in6 *)addr;
2871
2872                                 if (addr->sa_len != sizeof(*sin6)) {
2873                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2874                                         return (EINVAL);
2875                                 }
2876                                 lport = sin6->sin6_port;
2877                                 /*
2878                                  * For LOOPBACK the prison_local_ip6() call
2879                                  * will transmute the ipv6 address to the
2880                                  * proper value.
2881                                  */
2882                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2883                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2884                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2885                                         return (error);
2886                                 }
2887                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2888                                         bindall = 0;
2889                                         /* KAME hack: embed scopeid */
2890                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2891                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2892                                                 return (EINVAL);
2893                                         }
2894                                 }
2895                                 /* this must be cleared for ifa_ifwithaddr() */
2896                                 sin6->sin6_scope_id = 0;
2897                                 break;
2898                         }
2899 #endif
2900                 default:
2901                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2902                         return (EAFNOSUPPORT);
2903                 }
2904         }
2905         SCTP_INP_INFO_WLOCK();
2906         SCTP_INP_WLOCK(inp);
2907         /* Setup a vrf_id to be the default for the non-bind-all case. */
2908         vrf_id = inp->def_vrf_id;
2909
2910         /* increase our count due to the unlock we do */
2911         SCTP_INP_INCR_REF(inp);
2912         if (lport) {
2913                 /*
2914                  * Did the caller specify a port? if so we must see if an ep
2915                  * already has this one bound.
2916                  */
2917                 /* got to be root to get at low ports */
2918                 if (ntohs(lport) < IPPORT_RESERVED) {
2919                         if (p && (error =
2920                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2921                             )) {
2922                                 SCTP_INP_DECR_REF(inp);
2923                                 SCTP_INP_WUNLOCK(inp);
2924                                 SCTP_INP_INFO_WUNLOCK();
2925                                 return (error);
2926                         }
2927                 }
2928                 SCTP_INP_WUNLOCK(inp);
2929                 if (bindall) {
2930                         vrf_id = inp->def_vrf_id;
2931                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2932                         if (inp_tmp != NULL) {
2933                                 /*
2934                                  * lock guy returned and lower count note
2935                                  * that we are not bound so inp_tmp should
2936                                  * NEVER be inp. And it is this inp
2937                                  * (inp_tmp) that gets the reference bump,
2938                                  * so we must lower it.
2939                                  */
2940                                 SCTP_INP_DECR_REF(inp_tmp);
2941                                 /* unlock info */
2942                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2943                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2944                                         /*
2945                                          * Ok, must be one-2-one and
2946                                          * allowing port re-use
2947                                          */
2948                                         port_reuse_active = 1;
2949                                         goto continue_anyway;
2950                                 }
2951                                 SCTP_INP_DECR_REF(inp);
2952                                 SCTP_INP_INFO_WUNLOCK();
2953                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2954                                 return (EADDRINUSE);
2955                         }
2956                 } else {
2957                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2958                         if (inp_tmp != NULL) {
2959                                 /*
2960                                  * lock guy returned and lower count note
2961                                  * that we are not bound so inp_tmp should
2962                                  * NEVER be inp. And it is this inp
2963                                  * (inp_tmp) that gets the reference bump,
2964                                  * so we must lower it.
2965                                  */
2966                                 SCTP_INP_DECR_REF(inp_tmp);
2967                                 /* unlock info */
2968                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2969                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2970                                         /*
2971                                          * Ok, must be one-2-one and
2972                                          * allowing port re-use
2973                                          */
2974                                         port_reuse_active = 1;
2975                                         goto continue_anyway;
2976                                 }
2977                                 SCTP_INP_DECR_REF(inp);
2978                                 SCTP_INP_INFO_WUNLOCK();
2979                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2980                                 return (EADDRINUSE);
2981                         }
2982                 }
2983 continue_anyway:
2984                 SCTP_INP_WLOCK(inp);
2985                 if (bindall) {
2986                         /* verify that no lport is not used by a singleton */
2987                         if ((port_reuse_active == 0) &&
2988                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2989                                 /* Sorry someone already has this one bound */
2990                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2991                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2992                                         port_reuse_active = 1;
2993                                 } else {
2994                                         SCTP_INP_DECR_REF(inp);
2995                                         SCTP_INP_WUNLOCK(inp);
2996                                         SCTP_INP_INFO_WUNLOCK();
2997                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2998                                         return (EADDRINUSE);
2999                                 }
3000                         }
3001                 }
3002         } else {
3003                 uint16_t first, last, candidate;
3004                 uint16_t count;
3005                 int done;
3006
3007                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3008                         first = MODULE_GLOBAL(ipport_hifirstauto);
3009                         last = MODULE_GLOBAL(ipport_hilastauto);
3010                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3011                         if (p && (error =
3012                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3013                             )) {
3014                                 SCTP_INP_DECR_REF(inp);
3015                                 SCTP_INP_WUNLOCK(inp);
3016                                 SCTP_INP_INFO_WUNLOCK();
3017                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3018                                 return (error);
3019                         }
3020                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3021                         last = MODULE_GLOBAL(ipport_lowlastauto);
3022                 } else {
3023                         first = MODULE_GLOBAL(ipport_firstauto);
3024                         last = MODULE_GLOBAL(ipport_lastauto);
3025                 }
3026                 if (first > last) {
3027                         uint16_t temp;
3028
3029                         temp = first;
3030                         first = last;
3031                         last = temp;
3032                 }
3033                 count = last - first + 1;       /* number of candidates */
3034                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3035
3036                 done = 0;
3037                 while (!done) {
3038                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3039                                 done = 1;
3040                         }
3041                         if (!done) {
3042                                 if (--count == 0) {
3043                                         SCTP_INP_DECR_REF(inp);
3044                                         SCTP_INP_WUNLOCK(inp);
3045                                         SCTP_INP_INFO_WUNLOCK();
3046                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3047                                         return (EADDRINUSE);
3048                                 }
3049                                 if (candidate == last)
3050                                         candidate = first;
3051                                 else
3052                                         candidate = candidate + 1;
3053                         }
3054                 }
3055                 lport = htons(candidate);
3056         }
3057         SCTP_INP_DECR_REF(inp);
3058         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3059             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3060                 /*
3061                  * this really should not happen. The guy did a non-blocking
3062                  * bind and then did a close at the same time.
3063                  */
3064                 SCTP_INP_WUNLOCK(inp);
3065                 SCTP_INP_INFO_WUNLOCK();
3066                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3067                 return (EINVAL);
3068         }
3069         /* ok we look clear to give out this port, so lets setup the binding */
3070         if (bindall) {
3071                 /* binding to all addresses, so just set in the proper flags */
3072                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3073                 /* set the automatic addr changes from kernel flag */
3074                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3075                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3076                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3077                 } else {
3078                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3079                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3080                 }
3081                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3082                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3083                 } else {
3084                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3085                 }
3086                 /*
3087                  * set the automatic mobility_base from kernel flag (by
3088                  * micchie)
3089                  */
3090                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3091                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3092                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3093                 } else {
3094                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3095                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3096                 }
3097                 /*
3098                  * set the automatic mobility_fasthandoff from kernel flag
3099                  * (by micchie)
3100                  */
3101                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3102                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3104                 } else {
3105                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3107                 }
3108         } else {
3109                 /*
3110                  * bind specific, make sure flags is off and add a new
3111                  * address structure to the sctp_addr_list inside the ep
3112                  * structure.
3113                  *
3114                  * We will need to allocate one and insert it at the head. The
3115                  * socketopt call can just insert new addresses in there as
3116                  * well. It will also have to do the embed scope kame hack
3117                  * too (before adding).
3118                  */
3119                 struct sctp_ifa *ifa;
3120                 struct sockaddr_storage store_sa;
3121
3122                 memset(&store_sa, 0, sizeof(store_sa));
3123                 switch (addr->sa_family) {
3124 #ifdef INET
3125                 case AF_INET:
3126                         {
3127                                 struct sockaddr_in *sin;
3128
3129                                 sin = (struct sockaddr_in *)&store_sa;
3130                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3131                                 sin->sin_port = 0;
3132                                 break;
3133                         }
3134 #endif
3135 #ifdef INET6
3136                 case AF_INET6:
3137                         {
3138                                 struct sockaddr_in6 *sin6;
3139
3140                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3141                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3142                                 sin6->sin6_port = 0;
3143                                 break;
3144                         }
3145 #endif
3146                 default:
3147                         break;
3148                 }
3149                 /*
3150                  * first find the interface with the bound address need to
3151                  * zero out the port to find the address! yuck! can't do
3152                  * this earlier since need port for sctp_pcb_findep()
3153                  */
3154                 if (sctp_ifap != NULL) {
3155                         ifa = sctp_ifap;
3156                 } else {
3157                         /*
3158                          * Note for BSD we hit here always other O/S's will
3159                          * pass things in via the sctp_ifap argument
3160                          * (Panda).
3161                          */
3162                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3163                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3164                 }
3165                 if (ifa == NULL) {
3166                         /* Can't find an interface with that address */
3167                         SCTP_INP_WUNLOCK(inp);
3168                         SCTP_INP_INFO_WUNLOCK();
3169                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3170                         return (EADDRNOTAVAIL);
3171                 }
3172 #ifdef INET6
3173                 if (addr->sa_family == AF_INET6) {
3174                         /* GAK, more FIXME IFA lock? */
3175                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3176                                 /* Can't bind a non-existent addr. */
3177                                 SCTP_INP_WUNLOCK(inp);
3178                                 SCTP_INP_INFO_WUNLOCK();
3179                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3180                                 return (EINVAL);
3181                         }
3182                 }
3183 #endif
3184                 /* we're not bound all */
3185                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3186                 /* allow bindx() to send ASCONF's for binding changes */
3187                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3188                 /* clear automatic addr changes from kernel flag */
3189                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3190
3191                 /* add this address to the endpoint list */
3192                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3193                 if (error != 0) {
3194                         SCTP_INP_WUNLOCK(inp);
3195                         SCTP_INP_INFO_WUNLOCK();
3196                         return (error);
3197                 }
3198                 inp->laddr_count++;
3199         }
3200         /* find the bucket */
3201         if (port_reuse_active) {
3202                 /* Put it into tcp 1-2-1 hash */
3203                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3204                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3205         } else {
3206                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3207         }
3208         /* put it in the bucket */
3209         LIST_INSERT_HEAD(head, inp, sctp_hash);
3210         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3211             (void *)head, ntohs(lport), port_reuse_active);
3212         /* set in the port */
3213         inp->sctp_lport = lport;
3214
3215         /* turn off just the unbound flag */
3216         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3217         SCTP_INP_WUNLOCK(inp);
3218         SCTP_INP_INFO_WUNLOCK();
3219         return (0);
3220 }
3221
3222
3223 static void
3224 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3225 {
3226         struct sctp_iterator *it, *nit;
3227
3228         /*
3229          * We enter with the only the ITERATOR_LOCK in place and a write
3230          * lock on the inp_info stuff.
3231          */
3232         it = sctp_it_ctl.cur_it;
3233         if (it && (it->vn != curvnet)) {
3234                 /* Its not looking at our VNET */
3235                 return;
3236         }
3237         if (it && (it->inp == inp)) {
3238                 /*
3239                  * This is tricky and we hold the iterator lock, but when it
3240                  * returns and gets the lock (when we release it) the
3241                  * iterator will try to operate on inp. We need to stop that
3242                  * from happening. But of course the iterator has a
3243                  * reference on the stcb and inp. We can mark it and it will
3244                  * stop.
3245                  *
3246                  * If its a single iterator situation, we set the end iterator
3247                  * flag. Otherwise we set the iterator to go to the next
3248                  * inp.
3249                  *
3250                  */
3251                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3252                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3253                 } else {
3254                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3255                 }
3256         }
3257         /*
3258          * Now go through and remove any single reference to our inp that
3259          * may be still pending on the list
3260          */
3261         SCTP_IPI_ITERATOR_WQ_LOCK();
3262         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3263                 if (it->vn != curvnet) {
3264                         continue;
3265                 }
3266                 if (it->inp == inp) {
3267                         /* This one points to me is it inp specific? */
3268                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3269                                 /* Remove and free this one */
3270                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3271                                     it, sctp_nxt_itr);
3272                                 if (it->function_atend != NULL) {
3273                                         (*it->function_atend) (it->pointer, it->val);
3274                                 }
3275                                 SCTP_FREE(it, SCTP_M_ITER);
3276                         } else {
3277                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3278                                 if (it->inp) {
3279                                         SCTP_INP_INCR_REF(it->inp);
3280                                 }
3281                         }
3282                         /*
3283                          * When its put in the refcnt is incremented so decr
3284                          * it
3285                          */
3286                         SCTP_INP_DECR_REF(inp);
3287                 }
3288         }
3289         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3290 }
3291
3292 /* release sctp_inpcb unbind the port */
3293 void
3294 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3295 {
3296         /*
3297          * Here we free a endpoint. We must find it (if it is in the Hash
3298          * table) and remove it from there. Then we must also find it in the
3299          * overall list and remove it from there. After all removals are
3300          * complete then any timer has to be stopped. Then start the actual
3301          * freeing. a) Any local lists. b) Any associations. c) The hash of
3302          * all associations. d) finally the ep itself.
3303          */
3304         struct sctp_tcb *asoc, *nasoc;
3305         struct sctp_laddr *laddr, *nladdr;
3306         struct inpcb *ip_pcb;
3307         struct socket *so;
3308         int being_refed = 0;
3309         struct sctp_queued_to_read *sq, *nsq;
3310         int cnt;
3311         sctp_sharedkey_t *shared_key, *nshared_key;
3312
3313
3314 #ifdef SCTP_LOG_CLOSING
3315         sctp_log_closing(inp, NULL, 0);
3316 #endif
3317         SCTP_ITERATOR_LOCK();
3318         /* mark any iterators on the list or being processed */
3319         sctp_iterator_inp_being_freed(inp);
3320         SCTP_ITERATOR_UNLOCK();
3321         so = inp->sctp_socket;
3322         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3323                 /* been here before.. eeks.. get out of here */
3324                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3325 #ifdef SCTP_LOG_CLOSING
3326                 sctp_log_closing(inp, NULL, 1);
3327 #endif
3328                 return;
3329         }
3330         SCTP_ASOC_CREATE_LOCK(inp);
3331         SCTP_INP_INFO_WLOCK();
3332
3333         SCTP_INP_WLOCK(inp);
3334         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3335                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3336                 /* socket is gone, so no more wakeups allowed */
3337                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3338                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3339                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3340
3341         }
3342         /* First time through we have the socket lock, after that no more. */
3343         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3344             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3345
3346         if (inp->control) {
3347                 sctp_m_freem(inp->control);
3348                 inp->control = NULL;
3349         }
3350         if (inp->pkt) {
3351                 sctp_m_freem(inp->pkt);
3352                 inp->pkt = NULL;
3353         }
3354         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3355                                          * here but I will be nice :> (i.e.
3356                                          * ip_pcb = ep;) */
3357         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3358                 int cnt_in_sd;
3359
3360                 cnt_in_sd = 0;
3361                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3362                         SCTP_TCB_LOCK(asoc);
3363                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3364                                 /* Skip guys being freed */
3365                                 cnt_in_sd++;
3366                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3367                                         /*
3368                                          * Special case - we did not start a
3369                                          * kill timer on the asoc due to it
3370                                          * was not closed. So go ahead and
3371                                          * start it now.
3372                                          */
3373                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3374                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3375                                 }
3376                                 SCTP_TCB_UNLOCK(asoc);
3377                                 continue;
3378                         }
3379                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3380                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3381                             (asoc->asoc.total_output_queue_size == 0)) {
3382                                 /*
3383                                  * If we have data in queue, we don't want
3384                                  * to just free since the app may have done,
3385                                  * send()/close or connect/send/close. And
3386                                  * it wants the data to get across first.
3387                                  */
3388                                 /* Just abandon things in the front states */
3389                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3390                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3391                                         cnt_in_sd++;
3392                                 }
3393                                 continue;
3394                         }
3395                         /* Disconnect the socket please */
3396                         asoc->sctp_socket = NULL;
3397                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3398                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3399                             (asoc->asoc.control_pdapi) ||
3400                             (asoc->asoc.size_on_all_streams > 0) ||
3401                             (so && (so->so_rcv.sb_cc > 0))) {
3402                                 /* Left with Data unread */
3403                                 struct mbuf *op_err;
3404
3405                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3406                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3407                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3408                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3409                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3410                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3411                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3412                                 }
3413                                 if (sctp_free_assoc(inp, asoc,
3414                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3415                                         cnt_in_sd++;
3416                                 }
3417                                 continue;
3418                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3419                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3420                             (asoc->asoc.stream_queue_cnt == 0)) {
3421                                 if (asoc->asoc.locked_on_sending) {
3422                                         goto abort_anyway;
3423                                 }
3424                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3425                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3426                                         struct sctp_nets *netp;
3427
3428                                         /*
3429                                          * there is nothing queued to send,
3430                                          * so I send shutdown
3431                                          */
3432                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3433                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3434                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3435                                         }
3436                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3437                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3438                                         sctp_stop_timers_for_shutdown(asoc);
3439                                         if (asoc->asoc.alternate) {
3440                                                 netp = asoc->asoc.alternate;
3441                                         } else {
3442                                                 netp = asoc->asoc.primary_destination;
3443                                         }
3444                                         sctp_send_shutdown(asoc, netp);
3445                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3446                                             netp);
3447                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3448                                             asoc->asoc.primary_destination);
3449                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3450                                 }
3451                         } else {
3452                                 /* mark into shutdown pending */
3453                                 struct sctp_stream_queue_pending *sp;
3454
3455                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3456                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3457                                     asoc->asoc.primary_destination);
3458                                 if (asoc->asoc.locked_on_sending) {
3459                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3460                                             sctp_streamhead);
3461                                         if (sp == NULL) {
3462                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3463                                                     (void *)asoc->asoc.locked_on_sending,
3464                                                     asoc->asoc.locked_on_sending->stream_no);
3465                                         } else {
3466                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3467                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3468                                         }
3469                                 }
3470                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3471                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3472                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3473                                         struct mbuf *op_err;
3474
3475                         abort_anyway:
3476                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3477                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3478                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3479                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3480                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3481                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3482                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3483                                         }
3484                                         if (sctp_free_assoc(inp, asoc,
3485                                             SCTP_PCBFREE_NOFORCE,
3486                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3487                                                 cnt_in_sd++;
3488                                         }
3489                                         continue;
3490                                 } else {
3491                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3492                                 }
3493                         }
3494                         cnt_in_sd++;
3495                         SCTP_TCB_UNLOCK(asoc);
3496                 }
3497                 /* now is there some left in our SHUTDOWN state? */
3498                 if (cnt_in_sd) {
3499 #ifdef SCTP_LOG_CLOSING
3500                         sctp_log_closing(inp, NULL, 2);
3501 #endif
3502                         inp->sctp_socket = NULL;
3503                         SCTP_INP_WUNLOCK(inp);
3504                         SCTP_ASOC_CREATE_UNLOCK(inp);
3505                         SCTP_INP_INFO_WUNLOCK();
3506                         return;
3507                 }
3508         }
3509         inp->sctp_socket = NULL;
3510         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3511             SCTP_PCB_FLAGS_UNBOUND) {
3512                 /*
3513                  * ok, this guy has been bound. It's port is somewhere in
3514                  * the SCTP_BASE_INFO(hash table). Remove it!
3515                  */
3516                 LIST_REMOVE(inp, sctp_hash);
3517                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3518         }
3519         /*
3520          * If there is a timer running to kill us, forget it, since it may
3521          * have a contest on the INP lock.. which would cause us to die ...
3522          */
3523         cnt = 0;
3524         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3525                 SCTP_TCB_LOCK(asoc);
3526                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3527                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3528                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3529                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3530                         }
3531                         cnt++;
3532                         SCTP_TCB_UNLOCK(asoc);
3533                         continue;
3534                 }
3535                 /* Free associations that are NOT killing us */
3536                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3537                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3538                         struct mbuf *op_err;
3539
3540                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3541                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3542                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3543                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3544                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3545                         cnt++;
3546                         SCTP_TCB_UNLOCK(asoc);
3547                         continue;
3548                 }
3549                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3550                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3551                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3552                 }
3553                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3554                         cnt++;
3555                 }
3556         }
3557         if (cnt) {
3558                 /* Ok we have someone out there that will kill us */
3559                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3560 #ifdef SCTP_LOG_CLOSING
3561                 sctp_log_closing(inp, NULL, 3);
3562 #endif
3563                 SCTP_INP_WUNLOCK(inp);
3564                 SCTP_ASOC_CREATE_UNLOCK(inp);
3565                 SCTP_INP_INFO_WUNLOCK();
3566                 return;
3567         }
3568         if (SCTP_INP_LOCK_CONTENDED(inp))
3569                 being_refed++;
3570         if (SCTP_INP_READ_CONTENDED(inp))
3571                 being_refed++;
3572         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3573                 being_refed++;
3574
3575         if ((inp->refcount) ||
3576             (being_refed) ||
3577             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3578                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3579 #ifdef SCTP_LOG_CLOSING
3580                 sctp_log_closing(inp, NULL, 4);
3581 #endif
3582                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3583                 SCTP_INP_WUNLOCK(inp);
3584                 SCTP_ASOC_CREATE_UNLOCK(inp);
3585                 SCTP_INP_INFO_WUNLOCK();
3586                 return;
3587         }
3588         inp->sctp_ep.signature_change.type = 0;
3589         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3590         /*
3591          * Remove it from the list .. last thing we need a lock for.
3592          */
3593         LIST_REMOVE(inp, sctp_list);
3594         SCTP_INP_WUNLOCK(inp);
3595         SCTP_ASOC_CREATE_UNLOCK(inp);
3596         SCTP_INP_INFO_WUNLOCK();
3597         /*
3598          * Now we release all locks. Since this INP cannot be found anymore
3599          * except possibly by the kill timer that might be running. We call
3600          * the drain function here. It should hit the case were it sees the
3601          * ACTIVE flag cleared and exit out freeing us to proceed and
3602          * destroy everything.
3603          */
3604         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3605                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3606         } else {
3607                 /* Probably un-needed */
3608                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3609         }
3610
3611 #ifdef SCTP_LOG_CLOSING
3612         sctp_log_closing(inp, NULL, 5);
3613 #endif
3614
3615
3616         if ((inp->sctp_asocidhash) != NULL) {
3617                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3618                 inp->sctp_asocidhash = NULL;
3619         }
3620         /* sa_ignore FREED_MEMORY */
3621         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3622                 /* Its only abandoned if it had data left */
3623                 if (sq->length)
3624                         SCTP_STAT_INCR(sctps_left_abandon);
3625
3626                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3627                 sctp_free_remote_addr(sq->whoFrom);
3628                 if (so)
3629                         so->so_rcv.sb_cc -= sq->length;
3630                 if (sq->data) {
3631                         sctp_m_freem(sq->data);
3632                         sq->data = NULL;
3633                 }
3634                 /*
3635                  * no need to free the net count, since at this point all
3636                  * assoc's are gone.
3637                  */
3638                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3639                 SCTP_DECR_READQ_COUNT();
3640         }
3641         /* Now the sctp_pcb things */
3642         /*
3643          * free each asoc if it is not already closed/free. we can't use the
3644          * macro here since le_next will get freed as part of the
3645          * sctp_free_assoc() call.
3646          */
3647         if (so) {
3648 #ifdef IPSEC
3649                 ipsec_delete_pcbpolicy(ip_pcb);
3650 #endif                          /* IPSEC */
3651
3652                 /* Unlocks not needed since the socket is gone now */
3653         }
3654         if (ip_pcb->inp_options) {
3655                 (void)sctp_m_free(ip_pcb->inp_options);
3656                 ip_pcb->inp_options = 0;
3657         }
3658 #ifdef INET6
3659         if (ip_pcb->inp_vflag & INP_IPV6) {
3660                 struct in6pcb *in6p;
3661
3662                 in6p = (struct in6pcb *)inp;
3663                 ip6_freepcbopts(in6p->in6p_outputopts);
3664         }
3665 #endif                          /* INET6 */
3666         ip_pcb->inp_vflag = 0;
3667         /* free up authentication fields */
3668         if (inp->sctp_ep.local_auth_chunks != NULL)
3669                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3670         if (inp->sctp_ep.local_hmacs != NULL)
3671                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3672
3673         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3674                 LIST_REMOVE(shared_key, next);
3675                 sctp_free_sharedkey(shared_key);
3676                 /* sa_ignore FREED_MEMORY */
3677         }
3678
3679         /*
3680          * if we have an address list the following will free the list of
3681          * ifaddr's that are set into this ep. Again macro limitations here,
3682          * since the LIST_FOREACH could be a bad idea.
3683          */
3684         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3685                 sctp_remove_laddr(laddr);
3686         }
3687
3688 #ifdef SCTP_TRACK_FREED_ASOCS
3689         /* TEMP CODE */
3690         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3691                 LIST_REMOVE(asoc, sctp_tcblist);
3692                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3693                 SCTP_DECR_ASOC_COUNT();
3694         }
3695         /* *** END TEMP CODE *** */
3696 #endif
3697         /* Now lets see about freeing the EP hash table. */
3698         if (inp->sctp_tcbhash != NULL) {
3699                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3700                 inp->sctp_tcbhash = NULL;
3701         }
3702         /* Now we must put the ep memory back into the zone pool */
3703         crfree(inp->ip_inp.inp.inp_cred);
3704         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3705         SCTP_INP_LOCK_DESTROY(inp);
3706         SCTP_INP_READ_DESTROY(inp);
3707         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3708         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3709         SCTP_DECR_EP_COUNT();
3710 }
3711
3712
3713 struct sctp_nets *
3714 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3715 {
3716         struct sctp_nets *net;
3717
3718         /* locate the address */
3719         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3720                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3721                         return (net);
3722         }
3723         return (NULL);
3724 }
3725
3726
3727 int
3728 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3729 {
3730         struct sctp_ifa *sctp_ifa;
3731
3732         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3733         if (sctp_ifa) {
3734                 return (1);
3735         } else {
3736                 return (0);
3737         }
3738 }
3739
3740 /*
3741  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3742  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3743  * stats of stuff.
3744  */
3745 int
3746 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3747     struct sctp_nets **netp, int set_scope, int from)
3748 {
3749         /*
3750          * The following is redundant to the same lines in the
3751          * sctp_aloc_assoc() but is needed since others call the add address
3752          * function
3753          */
3754         struct sctp_nets *net, *netfirst;
3755         int addr_inscope;
3756
3757         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3758             from);
3759         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3760
3761         netfirst = sctp_findnet(stcb, newaddr);
3762         if (netfirst) {
3763                 /*
3764                  * Lie and return ok, we don't want to make the association
3765                  * go away for this behavior. It will happen in the TCP
3766                  * model in a connected socket. It does not reach the hash
3767                  * table until after the association is built so it can't be
3768                  * found. Mark as reachable, since the initial creation will
3769                  * have been cleared and the NOT_IN_ASSOC flag will have
3770                  * been added... and we don't want to end up removing it
3771                  * back out.
3772                  */
3773                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3774                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3775                             SCTP_ADDR_UNCONFIRMED);
3776                 } else {
3777                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3778                 }
3779
3780                 return (0);
3781         }
3782         addr_inscope = 1;
3783         switch (newaddr->sa_family) {
3784 #ifdef INET
3785         case AF_INET:
3786                 {
3787                         struct sockaddr_in *sin;
3788
3789                         sin = (struct sockaddr_in *)newaddr;
3790                         if (sin->sin_addr.s_addr == 0) {
3791                                 /* Invalid address */
3792                                 return (-1);
3793                         }
3794                         /* zero out the bzero area */
3795                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3796
3797                         /* assure len is set */
3798                         sin->sin_len = sizeof(struct sockaddr_in);
3799                         if (set_scope) {
3800 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3801                                 stcb->asoc.scope.ipv4_local_scope = 1;
3802 #else
3803                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3804                                         stcb->asoc.scope.ipv4_local_scope = 1;
3805                                 }
3806 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3807                         } else {
3808                                 /* Validate the address is in scope */
3809                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3810                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3811                                         addr_inscope = 0;
3812                                 }
3813                         }
3814                         break;
3815                 }
3816 #endif
3817 #ifdef INET6
3818         case AF_INET6:
3819                 {
3820                         struct sockaddr_in6 *sin6;
3821
3822                         sin6 = (struct sockaddr_in6 *)newaddr;
3823                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3824                                 /* Invalid address */
3825                                 return (-1);
3826                         }
3827                         /* assure len is set */
3828                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3829                         if (set_scope) {
3830                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3831                                         stcb->asoc.scope.loopback_scope = 1;
3832                                         stcb->asoc.scope.local_scope = 0;
3833                                         stcb->asoc.scope.ipv4_local_scope = 1;
3834                                         stcb->asoc.scope.site_scope = 1;
3835                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3836                                         /*
3837                                          * If the new destination is a
3838                                          * LINK_LOCAL we must have common
3839                                          * site scope. Don't set the local
3840                                          * scope since we may not share all
3841                                          * links, only loopback can do this.
3842                                          * Links on the local network would
3843                                          * also be on our private network
3844                                          * for v4 too.
3845                                          */
3846                                         stcb->asoc.scope.ipv4_local_scope = 1;
3847                                         stcb->asoc.scope.site_scope = 1;
3848                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3849                                         /*
3850                                          * If the new destination is
3851                                          * SITE_LOCAL then we must have site
3852                                          * scope in common.
3853                                          */
3854                                         stcb->asoc.scope.site_scope = 1;
3855                                 }
3856                         } else {
3857                                 /* Validate the address is in scope */
3858                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3859                                     (stcb->asoc.scope.loopback_scope == 0)) {
3860                                         addr_inscope = 0;
3861                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3862                                     (stcb->asoc.scope.local_scope == 0)) {
3863                                         addr_inscope = 0;
3864                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3865                                     (stcb->asoc.scope.site_scope == 0)) {
3866                                         addr_inscope = 0;
3867                                 }
3868                         }
3869                         break;
3870                 }
3871 #endif
3872         default:
3873                 /* not supported family type */
3874                 return (-1);
3875         }
3876         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3877         if (net == NULL) {
3878                 return (-1);
3879         }
3880         SCTP_INCR_RADDR_COUNT();
3881         bzero(net, sizeof(struct sctp_nets));
3882         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3883         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3884         switch (newaddr->sa_family) {
3885 #ifdef INET
3886         case AF_INET:
3887                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3888                 break;
3889 #endif
3890 #ifdef INET6
3891         case AF_INET6:
3892                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3893                 break;
3894 #endif
3895         default:
3896                 break;
3897         }
3898         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3899         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3900                 stcb->asoc.scope.loopback_scope = 1;
3901                 stcb->asoc.scope.ipv4_local_scope = 1;
3902                 stcb->asoc.scope.local_scope = 0;
3903                 stcb->asoc.scope.site_scope = 1;
3904                 addr_inscope = 1;
3905         }
3906         net->failure_threshold = stcb->asoc.def_net_failure;
3907         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3908         if (addr_inscope == 0) {
3909                 net->dest_state = (SCTP_ADDR_REACHABLE |
3910                     SCTP_ADDR_OUT_OF_SCOPE);
3911         } else {
3912                 if (from == SCTP_ADDR_IS_CONFIRMED)
3913                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3914                         net->dest_state = SCTP_ADDR_REACHABLE;
3915                 else
3916                         net->dest_state = SCTP_ADDR_REACHABLE |
3917                             SCTP_ADDR_UNCONFIRMED;
3918         }
3919         /*
3920          * We set this to 0, the timer code knows that this means its an
3921          * initial value
3922          */
3923         net->rto_needed = 1;
3924         net->RTO = 0;
3925         net->RTO_measured = 0;
3926         stcb->asoc.numnets++;
3927         net->ref_count = 1;
3928         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3929         net->port = stcb->asoc.port;
3930         net->dscp = stcb->asoc.default_dscp;
3931 #ifdef INET6
3932         net->flowlabel = stcb->asoc.default_flowlabel;
3933 #endif
3934         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3935                 net->dest_state |= SCTP_ADDR_NOHB;
3936         } else {
3937                 net->dest_state &= ~SCTP_ADDR_NOHB;
3938         }
3939         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3940                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3941         } else {
3942                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3943         }
3944         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3945         /* Init the timer structure */
3946         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3947         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3948         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3949
3950         /* Now generate a route for this guy */
3951 #ifdef INET6
3952         /* KAME hack: embed scopeid */
3953         if (newaddr->sa_family == AF_INET6) {
3954                 struct sockaddr_in6 *sin6;
3955
3956                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3957                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3958                 sin6->sin6_scope_id = 0;
3959         }
3960 #endif
3961         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3962
3963         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3964                 /* Get source address */
3965                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3966                     stcb,
3967                     (sctp_route_t *) & net->ro,
3968                     net,
3969                     0,
3970                     stcb->asoc.vrf_id);
3971                 if (net->ro._s_addr != NULL) {
3972                         net->src_addr_selected = 1;
3973                         /* Now get the interface MTU */
3974                         if (net->ro._s_addr->ifn_p != NULL) {
3975                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3976                         }
3977                 } else {
3978                         net->src_addr_selected = 0;
3979                 }
3980                 if (net->mtu > 0) {
3981                         uint32_t rmtu;
3982
3983                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3984                         if (rmtu == 0) {
3985                                 /*
3986                                  * Start things off to match mtu of
3987                                  * interface please.
3988                                  */
3989                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3990                                     net->ro.ro_rt, net->mtu);
3991                         } else {
3992                                 /*
3993                                  * we take the route mtu over the interface,
3994                                  * since the route may be leading out the
3995                                  * loopback, or a different interface.
3996                                  */
3997                                 net->mtu = rmtu;
3998                         }
3999                 }
4000         } else {
4001                 net->src_addr_selected = 0;
4002         }
4003         if (net->mtu == 0) {
4004                 switch (newaddr->sa_family) {
4005 #ifdef INET
4006                 case AF_INET:
4007                         net->mtu = SCTP_DEFAULT_MTU;
4008                         break;
4009 #endif
4010 #ifdef INET6
4011                 case AF_INET6:
4012                         net->mtu = 1280;
4013                         break;
4014 #endif
4015                 default:
4016                         break;
4017                 }
4018         }
4019 #if defined(INET) || defined(INET6)
4020         if (net->port) {
4021                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4022         }
4023 #endif
4024         if (from == SCTP_ALLOC_ASOC) {
4025                 stcb->asoc.smallest_mtu = net->mtu;
4026         }
4027         if (stcb->asoc.smallest_mtu > net->mtu) {
4028                 stcb->asoc.smallest_mtu = net->mtu;
4029         }
4030 #ifdef INET6
4031         if (newaddr->sa_family == AF_INET6) {
4032                 struct sockaddr_in6 *sin6;
4033
4034                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4035                 (void)sa6_recoverscope(sin6);
4036         }
4037 #endif
4038
4039         /* JRS - Use the congestion control given in the CC module */
4040         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4041                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4042
4043         /*
4044          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4045          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4046          */
4047         net->find_pseudo_cumack = 1;
4048         net->find_rtx_pseudo_cumack = 1;
4049         /* Choose an initial flowid. */
4050         net->flowid = stcb->asoc.my_vtag ^
4051             ntohs(stcb->rport) ^
4052             ntohs(stcb->sctp_ep->sctp_lport);
4053 #ifdef INVARIANTS
4054         net->flowidset = 1;
4055 #endif
4056         if (netp) {
4057                 *netp = net;
4058         }
4059         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4060         if (net->ro.ro_rt == NULL) {
4061                 /* Since we have no route put it at the back */
4062                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4063         } else if (netfirst == NULL) {
4064                 /* We are the first one in the pool. */
4065                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4066         } else if (netfirst->ro.ro_rt == NULL) {
4067                 /*
4068                  * First one has NO route. Place this one ahead of the first
4069                  * one.
4070                  */
4071                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4072         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4073                 /*
4074                  * This one has a different interface than the one at the
4075                  * top of the list. Place it ahead.
4076                  */
4077                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4078         } else {
4079                 /*
4080                  * Ok we have the same interface as the first one. Move
4081                  * forward until we find either a) one with a NULL route...
4082                  * insert ahead of that b) one with a different ifp.. insert
4083                  * after that. c) end of the list.. insert at the tail.
4084                  */
4085                 struct sctp_nets *netlook;
4086
4087                 do {
4088                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4089                         if (netlook == NULL) {
4090                                 /* End of the list */
4091                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4092                                 break;
4093                         } else if (netlook->ro.ro_rt == NULL) {
4094                                 /* next one has NO route */
4095                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4096                                 break;
4097                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4098                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4099                                     net, sctp_next);
4100                                 break;
4101                         }
4102                         /* Shift forward */
4103                         netfirst = netlook;
4104                 } while (netlook != NULL);
4105         }
4106
4107         /* got to have a primary set */
4108         if (stcb->asoc.primary_destination == 0) {
4109                 stcb->asoc.primary_destination = net;
4110         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4111                     (net->ro.ro_rt) &&
4112             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4113                 /* No route to current primary adopt new primary */
4114                 stcb->asoc.primary_destination = net;
4115         }
4116         /* Validate primary is first */
4117         net = TAILQ_FIRST(&stcb->asoc.nets);
4118         if ((net != stcb->asoc.primary_destination) &&
4119             (stcb->asoc.primary_destination)) {
4120                 /*
4121                  * first one on the list is NOT the primary sctp_cmpaddr()
4122                  * is much more efficient if the primary is the first on the
4123                  * list, make it so.
4124                  */
4125                 TAILQ_REMOVE(&stcb->asoc.nets,
4126                     stcb->asoc.primary_destination, sctp_next);
4127                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4128                     stcb->asoc.primary_destination, sctp_next);
4129         }
4130         return (0);
4131 }
4132
4133
4134 static uint32_t
4135 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4136 {
4137         uint32_t id;
4138         struct sctpasochead *head;
4139         struct sctp_tcb *lstcb;
4140
4141         SCTP_INP_WLOCK(inp);
4142 try_again:
4143         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4144                 /* TSNH */
4145                 SCTP_INP_WUNLOCK(inp);
4146                 return (0);
4147         }
4148         /*
4149          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4150          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4151          */
4152         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4153                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4154         }
4155         id = inp->sctp_associd_counter;
4156         inp->sctp_associd_counter++;
4157         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4158         if (lstcb) {
4159                 goto try_again;
4160         }
4161         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4162         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4163         stcb->asoc.in_asocid_hash = 1;
4164         SCTP_INP_WUNLOCK(inp);
4165         return id;
4166 }
4167
4168 /*
4169  * allocate an association and add it to the endpoint. The caller must be
4170  * careful to add all additional addresses once they are know right away or
4171  * else the assoc will be may experience a blackout scenario.
4172  */
4173 struct sctp_tcb *
4174 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4175     int *error, uint32_t override_tag, uint32_t vrf_id,
4176     struct thread *p
4177 )
4178 {
4179         /* note the p argument is only valid in unbound sockets */
4180
4181         struct sctp_tcb *stcb;
4182         struct sctp_association *asoc;
4183         struct sctpasochead *head;
4184         uint16_t rport;
4185         int err;
4186
4187         /*
4188          * Assumption made here: Caller has done a
4189          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4190          * address does not exist already.
4191          */
4192         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4193                 /* Hit max assoc, sorry no more */
4194                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4195                 *error = ENOBUFS;
4196                 return (NULL);
4197         }
4198         if (firstaddr == NULL) {
4199                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4200                 *error = EINVAL;
4201                 return (NULL);
4202         }
4203         SCTP_INP_RLOCK(inp);
4204         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4205             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4206             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4207                 /*
4208                  * If its in the TCP pool, its NOT allowed to create an
4209                  * association. The parent listener needs to call
4210                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4211                  * off, or connected one does this.. its an error.
4212                  */
4213                 SCTP_INP_RUNLOCK(inp);
4214                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4215                 *error = EINVAL;
4216                 return (NULL);
4217         }
4218         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4219             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4220                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4221                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4222                         SCTP_INP_RUNLOCK(inp);
4223                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4224                         *error = EINVAL;
4225                         return (NULL);
4226                 }
4227         }
4228         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4229 #ifdef SCTP_DEBUG
4230         if (firstaddr) {
4231                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4232                 switch (firstaddr->sa_family) {
4233 #ifdef INET
4234                 case AF_INET:
4235                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4236                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4237                         break;
4238 #endif
4239 #ifdef INET6
4240                 case AF_INET6:
4241                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4242                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4243                         break;
4244 #endif
4245                 default:
4246                         break;
4247                 }
4248         } else {
4249                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4250         }
4251 #endif                          /* SCTP_DEBUG */
4252         switch (firstaddr->sa_family) {
4253 #ifdef INET
4254         case AF_INET:
4255                 {
4256                         struct sockaddr_in *sin;
4257
4258                         sin = (struct sockaddr_in *)firstaddr;
4259                         if ((ntohs(sin->sin_port) == 0) ||
4260                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4261                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4262                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4263                                 /* Invalid address */
4264                                 SCTP_INP_RUNLOCK(inp);
4265                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4266                                 *error = EINVAL;
4267                                 return (NULL);
4268                         }
4269                         rport = sin->sin_port;
4270                         break;
4271                 }
4272 #endif
4273 #ifdef INET6
4274         case AF_INET6:
4275                 {
4276                         struct sockaddr_in6 *sin6;
4277
4278                         sin6 = (struct sockaddr_in6 *)firstaddr;
4279                         if ((ntohs(sin6->sin6_port) == 0) ||
4280                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4281                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4282                                 /* Invalid address */
4283                                 SCTP_INP_RUNLOCK(inp);
4284                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4285                                 *error = EINVAL;
4286                                 return (NULL);
4287                         }
4288                         rport = sin6->sin6_port;
4289                         break;
4290                 }
4291 #endif
4292         default:
4293                 /* not supported family type */
4294                 SCTP_INP_RUNLOCK(inp);
4295                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4296                 *error = EINVAL;
4297                 return (NULL);
4298         }
4299         SCTP_INP_RUNLOCK(inp);
4300         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4301                 /*
4302                  * If you have not performed a bind, then we need to do the
4303                  * ephemeral bind for you.
4304                  */
4305                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4306                     (struct sockaddr *)NULL,
4307                     (struct sctp_ifa *)NULL,
4308                     p
4309                     ))) {
4310                         /* bind error, probably perm */
4311                         *error = err;
4312                         return (NULL);
4313                 }
4314         }
4315         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4316         if (stcb == NULL) {
4317                 /* out of memory? */
4318                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4319                 *error = ENOMEM;
4320                 return (NULL);
4321         }
4322         SCTP_INCR_ASOC_COUNT();
4323
4324         bzero(stcb, sizeof(*stcb));
4325         asoc = &stcb->asoc;
4326
4327         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4328         SCTP_TCB_LOCK_INIT(stcb);
4329         SCTP_TCB_SEND_LOCK_INIT(stcb);
4330         stcb->rport = rport;
4331         /* setup back pointer's */
4332         stcb->sctp_ep = inp;
4333         stcb->sctp_socket = inp->sctp_socket;
4334         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4335                 /* failed */
4336                 SCTP_TCB_LOCK_DESTROY(stcb);
4337                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4338                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4339                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4340                 SCTP_DECR_ASOC_COUNT();
4341                 *error = err;
4342                 return (NULL);
4343         }
4344         /* and the port */
4345         SCTP_INP_INFO_WLOCK();
4346         SCTP_INP_WLOCK(inp);
4347         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4348                 /* inpcb freed while alloc going on */
4349                 SCTP_TCB_LOCK_DESTROY(stcb);
4350                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4351                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4352                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4353                 SCTP_INP_WUNLOCK(inp);
4354                 SCTP_INP_INFO_WUNLOCK();
4355                 SCTP_DECR_ASOC_COUNT();
4356                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4357                 *error = EINVAL;
4358                 return (NULL);
4359         }
4360         SCTP_TCB_LOCK(stcb);
4361
4362         /* now that my_vtag is set, add it to the hash */
4363         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4364         /* put it in the bucket in the vtag hash of assoc's for the system */
4365         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4366         SCTP_INP_INFO_WUNLOCK();
4367
4368         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4369                 /* failure.. memory error? */
4370                 if (asoc->strmout) {
4371                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4372                         asoc->strmout = NULL;
4373                 }
4374                 if (asoc->mapping_array) {
4375                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4376                         asoc->mapping_array = NULL;
4377                 }
4378                 if (asoc->nr_mapping_array) {
4379                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4380                         asoc->nr_mapping_array = NULL;
4381                 }
4382                 SCTP_DECR_ASOC_COUNT();
4383                 SCTP_TCB_UNLOCK(stcb);
4384                 SCTP_TCB_LOCK_DESTROY(stcb);
4385                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4386                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4387                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4388                 SCTP_INP_WUNLOCK(inp);
4389                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4390                 *error = ENOBUFS;
4391                 return (NULL);
4392         }
4393         /* Init all the timers */
4394         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4395         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4396         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4397         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4398         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4399         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4400         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4401
4402         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4403         /* now file the port under the hash as well */
4404         if (inp->sctp_tcbhash != NULL) {
4405                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4406                     inp->sctp_hashmark)];
4407                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4408         }
4409         SCTP_INP_WUNLOCK(inp);
4410         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4411         return (stcb);
4412 }
4413
4414
4415 void
4416 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4417 {
4418         struct sctp_association *asoc;
4419
4420         asoc = &stcb->asoc;
4421         asoc->numnets--;
4422         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4423         if (net == asoc->primary_destination) {
4424                 /* Reset primary */
4425                 struct sctp_nets *lnet;
4426
4427                 lnet = TAILQ_FIRST(&asoc->nets);
4428                 /*
4429                  * Mobility adaptation Ideally, if deleted destination is
4430                  * the primary, it becomes a fast retransmission trigger by
4431                  * the subsequent SET PRIMARY. (by micchie)
4432                  */
4433                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4434                     SCTP_MOBILITY_BASE) ||
4435                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4436                     SCTP_MOBILITY_FASTHANDOFF)) {
4437                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4438                         if (asoc->deleted_primary != NULL) {
4439                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4440                                 goto out;
4441                         }
4442                         asoc->deleted_primary = net;
4443                         atomic_add_int(&net->ref_count, 1);
4444                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4445                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4446                         sctp_mobility_feature_on(stcb->sctp_ep,
4447                             SCTP_MOBILITY_PRIM_DELETED);
4448                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4449                             stcb->sctp_ep, stcb, NULL);
4450                 }
4451 out:
4452                 /* Try to find a confirmed primary */
4453                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4454         }
4455         if (net == asoc->last_data_chunk_from) {
4456                 /* Reset primary */
4457                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4458         }
4459         if (net == asoc->last_control_chunk_from) {
4460                 /* Clear net */
4461                 asoc->last_control_chunk_from = NULL;
4462         }
4463         if (net == stcb->asoc.alternate) {
4464                 sctp_free_remote_addr(stcb->asoc.alternate);
4465                 stcb->asoc.alternate = NULL;
4466         }
4467         sctp_free_remote_addr(net);
4468 }
4469
4470 /*
4471  * remove a remote endpoint address from an association, it will fail if the
4472  * address does not exist.
4473  */
4474 int
4475 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4476 {
4477         /*
4478          * Here we need to remove a remote address. This is quite simple, we
4479          * first find it in the list of address for the association
4480          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4481          * on that item. Note we do not allow it to be removed if there are
4482          * no other addresses.
4483          */
4484         struct sctp_association *asoc;
4485         struct sctp_nets *net, *nnet;
4486
4487         asoc = &stcb->asoc;
4488
4489         /* locate the address */
4490         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4491                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4492                         continue;
4493                 }
4494                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4495                     remaddr)) {
4496                         /* we found the guy */
4497                         if (asoc->numnets < 2) {
4498                                 /* Must have at LEAST two remote addresses */
4499                                 return (-1);
4500                         } else {
4501                                 sctp_remove_net(stcb, net);
4502                                 return (0);
4503                         }
4504                 }
4505         }
4506         /* not found. */
4507         return (-2);
4508 }
4509
4510 void
4511 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4512 {
4513         struct sctpvtaghead *chain;
4514         struct sctp_tagblock *twait_block;
4515         int found = 0;
4516         int i;
4517
4518         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4519         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4520                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4521                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4522                             (twait_block->vtag_block[i].lport == lport) &&
4523                             (twait_block->vtag_block[i].rport == rport)) {
4524                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4525                                 twait_block->vtag_block[i].v_tag = 0;
4526                                 twait_block->vtag_block[i].lport = 0;
4527                                 twait_block->vtag_block[i].rport = 0;
4528                                 found = 1;
4529                                 break;
4530                         }
4531                 }
4532                 if (found)
4533                         break;
4534         }
4535 }
4536
4537 int
4538 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4539 {
4540         struct sctpvtaghead *chain;
4541         struct sctp_tagblock *twait_block;
4542         int found = 0;
4543         int i;
4544
4545         SCTP_INP_INFO_WLOCK();
4546         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4547         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4548                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4549                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4550                             (twait_block->vtag_block[i].lport == lport) &&
4551                             (twait_block->vtag_block[i].rport == rport)) {
4552                                 found = 1;
4553                                 break;
4554                         }
4555                 }
4556                 if (found)
4557                         break;
4558         }
4559         SCTP_INP_INFO_WUNLOCK();
4560         return (found);
4561 }
4562
4563
4564 void
4565 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4566 {
4567         struct sctpvtaghead *chain;
4568         struct sctp_tagblock *twait_block;
4569         struct timeval now;
4570         int set, i;
4571
4572         if (time == 0) {
4573                 /* Its disabled */
4574                 return;
4575         }
4576         (void)SCTP_GETTIME_TIMEVAL(&now);
4577         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4578         set = 0;
4579         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4580                 /* Block(s) present, lets find space, and expire on the fly */
4581                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4582                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4583                             !set) {
4584                                 twait_block->vtag_block[i].tv_sec_at_expire =
4585                                     now.tv_sec + time;
4586                                 twait_block->vtag_block[i].v_tag = tag;
4587                                 twait_block->vtag_block[i].lport = lport;
4588                                 twait_block->vtag_block[i].rport = rport;
4589                                 set = 1;
4590                         } else if ((twait_block->vtag_block[i].v_tag) &&
4591                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4592                                 /* Audit expires this guy */
4593                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4594                                 twait_block->vtag_block[i].v_tag = 0;
4595                                 twait_block->vtag_block[i].lport = 0;
4596                                 twait_block->vtag_block[i].rport = 0;
4597                                 if (set == 0) {
4598                                         /* Reuse it for my new tag */
4599                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4600                                         twait_block->vtag_block[i].v_tag = tag;
4601                                         twait_block->vtag_block[i].lport = lport;
4602                                         twait_block->vtag_block[i].rport = rport;
4603                                         set = 1;
4604                                 }
4605                         }
4606                 }
4607                 if (set) {
4608                         /*
4609                          * We only do up to the block where we can place our
4610                          * tag for audits
4611                          */
4612                         break;
4613                 }
4614         }
4615         /* Need to add a new block to chain */
4616         if (!set) {
4617                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4618                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4619                 if (twait_block == NULL) {
4620 #ifdef INVARIANTS
4621                         panic("Can not alloc tagblock");
4622 #endif
4623                         return;
4624                 }
4625                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4626                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4627                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4628                 twait_block->vtag_block[0].v_tag = tag;
4629                 twait_block->vtag_block[0].lport = lport;
4630                 twait_block->vtag_block[0].rport = rport;
4631         }
4632 }
4633
4634
4635
4636 /*-
4637  * Free the association after un-hashing the remote port. This
4638  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4639  * expect that the input to this function IS a locked TCB.
4640  * It will return 0, if it did NOT destroy the association (instead
4641  * it unlocks it. It will return NON-zero if it either destroyed the
4642  * association OR the association is already destroyed.
4643  */
4644 int
4645 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4646 {
4647         int i;
4648         struct sctp_association *asoc;
4649         struct sctp_nets *net, *nnet;
4650         struct sctp_laddr *laddr, *naddr;
4651         struct sctp_tmit_chunk *chk, *nchk;
4652         struct sctp_asconf_addr *aparam, *naparam;
4653         struct sctp_asconf_ack *aack, *naack;
4654         struct sctp_stream_reset_list *strrst, *nstrrst;
4655         struct sctp_queued_to_read *sq, *nsq;
4656         struct sctp_stream_queue_pending *sp, *nsp;
4657         sctp_sharedkey_t *shared_key, *nshared_key;
4658         struct socket *so;
4659
4660         /* first, lets purge the entry from the hash table. */
4661
4662 #ifdef SCTP_LOG_CLOSING
4663         sctp_log_closing(inp, stcb, 6);
4664 #endif
4665         if (stcb->asoc.state == 0) {
4666 #ifdef SCTP_LOG_CLOSING
4667                 sctp_log_closing(inp, NULL, 7);
4668 #endif
4669                 /* there is no asoc, really TSNH :-0 */
4670                 return (1);
4671         }
4672         if (stcb->asoc.alternate) {
4673                 sctp_free_remote_addr(stcb->asoc.alternate);
4674                 stcb->asoc.alternate = NULL;
4675         }
4676         /* TEMP CODE */
4677         if (stcb->freed_from_where == 0) {
4678                 /* Only record the first place free happened from */
4679                 stcb->freed_from_where = from_location;
4680         }
4681         /* TEMP CODE */
4682
4683         asoc = &stcb->asoc;
4684         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4685             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4686                 /* nothing around */
4687                 so = NULL;
4688         else
4689                 so = inp->sctp_socket;
4690
4691         /*
4692          * We used timer based freeing if a reader or writer is in the way.
4693          * So we first check if we are actually being called from a timer,
4694          * if so we abort early if a reader or writer is still in the way.
4695          */
4696         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4697             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4698                 /*
4699                  * is it the timer driving us? if so are the reader/writers
4700                  * gone?
4701                  */
4702                 if (stcb->asoc.refcnt) {
4703                         /* nope, reader or writer in the way */
4704                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4705                         /* no asoc destroyed */
4706                         SCTP_TCB_UNLOCK(stcb);
4707 #ifdef SCTP_LOG_CLOSING
4708                         sctp_log_closing(inp, stcb, 8);
4709 #endif
4710                         return (0);
4711                 }
4712         }
4713         /* now clean up any other timers */
4714         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4715         asoc->dack_timer.self = NULL;
4716         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4717         /*-
4718          * For stream reset we don't blast this unless
4719          * it is a str-reset timer, it might be the
4720          * free-asoc timer which we DON'T want to
4721          * disturb.
4722          */
4723         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4724                 asoc->strreset_timer.self = NULL;
4725         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4726         asoc->asconf_timer.self = NULL;
4727         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4728         asoc->autoclose_timer.self = NULL;
4729         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4730         asoc->shut_guard_timer.self = NULL;
4731         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4732         asoc->delayed_event_timer.self = NULL;
4733         /* Mobility adaptation */
4734         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4735         asoc->delete_prim_timer.self = NULL;
4736         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4737                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4738                 net->rxt_timer.self = NULL;
4739                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4740                 net->pmtu_timer.self = NULL;
4741                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4742                 net->hb_timer.self = NULL;
4743         }
4744         /* Now the read queue needs to be cleaned up (only once) */
4745         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4746                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4747                 SCTP_INP_READ_LOCK(inp);
4748                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4749                         if (sq->stcb == stcb) {
4750                                 sq->do_not_ref_stcb = 1;
4751                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4752                                 /*
4753                                  * If there is no end, there never will be
4754                                  * now.
4755                                  */
4756                                 if (sq->end_added == 0) {
4757                                         /* Held for PD-API clear that. */
4758                                         sq->pdapi_aborted = 1;
4759                                         sq->held_length = 0;
4760                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4761                                                 /*
4762                                                  * Need to add a PD-API
4763                                                  * aborted indication.
4764                                                  * Setting the control_pdapi
4765                                                  * assures that it will be
4766                                                  * added right after this
4767                                                  * msg.
4768                                                  */
4769                                                 uint32_t strseq;
4770
4771                                                 stcb->asoc.control_pdapi = sq;
4772                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4773                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4774                                                     stcb,
4775                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4776                                                     (void *)&strseq,
4777                                                     SCTP_SO_LOCKED);
4778                                                 stcb->asoc.control_pdapi = NULL;
4779                                         }
4780                                 }
4781                                 /* Add an end to wake them */
4782                                 sq->end_added = 1;
4783                         }
4784                 }
4785                 SCTP_INP_READ_UNLOCK(inp);
4786                 if (stcb->block_entry) {
4787                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4788                         stcb->block_entry->error = ECONNRESET;
4789                         stcb->block_entry = NULL;
4790                 }
4791         }
4792         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4793                 /*
4794                  * Someone holds a reference OR the socket is unaccepted
4795                  * yet.
4796                  */
4797                 if ((stcb->asoc.refcnt) ||
4798                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4799                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4800                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4801                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4802                 }
4803                 SCTP_TCB_UNLOCK(stcb);
4804                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4805                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4806                         /* nothing around */
4807                         so = NULL;
4808                 if (so) {
4809                         /* Wake any reader/writers */
4810                         sctp_sorwakeup(inp, so);
4811                         sctp_sowwakeup(inp, so);
4812                 }
4813 #ifdef SCTP_LOG_CLOSING
4814                 sctp_log_closing(inp, stcb, 9);
4815 #endif
4816                 /* no asoc destroyed */
4817                 return (0);
4818         }
4819 #ifdef SCTP_LOG_CLOSING
4820         sctp_log_closing(inp, stcb, 10);
4821 #endif
4822         /*
4823          * When I reach here, no others want to kill the assoc yet.. and I
4824          * own the lock. Now its possible an abort comes in when I do the
4825          * lock exchange below to grab all the locks to do the final take
4826          * out. to prevent this we increment the count, which will start a
4827          * timer and blow out above thus assuring us that we hold exclusive
4828          * killing of the asoc. Note that after getting back the TCB lock we
4829          * will go ahead and increment the counter back up and stop any
4830          * timer a passing stranger may have started :-S
4831          */
4832         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4833                 atomic_add_int(&stcb->asoc.refcnt, 1);
4834
4835                 SCTP_TCB_UNLOCK(stcb);
4836                 SCTP_INP_INFO_WLOCK();
4837                 SCTP_INP_WLOCK(inp);
4838                 SCTP_TCB_LOCK(stcb);
4839         }
4840         /* Double check the GONE flag */
4841         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4842             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4843                 /* nothing around */
4844                 so = NULL;
4845
4846         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4847             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4848                 /*
4849                  * For TCP type we need special handling when we are
4850                  * connected. We also include the peel'ed off ones to.
4851                  */
4852                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4853                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4854                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4855                         if (so) {
4856                                 SOCK_LOCK(so);
4857                                 if (so->so_rcv.sb_cc == 0) {
4858                                         so->so_state &= ~(SS_ISCONNECTING |
4859                                             SS_ISDISCONNECTING |
4860                                             SS_ISCONFIRMING |
4861                                             SS_ISCONNECTED);
4862                                 }
4863                                 socantrcvmore_locked(so);
4864                                 sctp_sowwakeup(inp, so);
4865                                 sctp_sorwakeup(inp, so);
4866                                 SCTP_SOWAKEUP(so);
4867                         }
4868                 }
4869         }
4870         /*
4871          * Make it invalid too, that way if its about to run it will abort
4872          * and return.
4873          */
4874         /* re-increment the lock */
4875         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4876                 atomic_add_int(&stcb->asoc.refcnt, -1);
4877         }
4878         if (stcb->asoc.refcnt) {
4879                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4880                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4881                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4882                         SCTP_INP_INFO_WUNLOCK();
4883                         SCTP_INP_WUNLOCK(inp);
4884                 }
4885                 SCTP_TCB_UNLOCK(stcb);
4886                 return (0);
4887         }
4888         asoc->state = 0;
4889         if (inp->sctp_tcbhash) {
4890                 LIST_REMOVE(stcb, sctp_tcbhash);
4891         }
4892         if (stcb->asoc.in_asocid_hash) {
4893                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4894         }
4895         /* Now lets remove it from the list of ALL associations in the EP */
4896         LIST_REMOVE(stcb, sctp_tcblist);
4897         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4898                 SCTP_INP_INCR_REF(inp);
4899                 SCTP_INP_WUNLOCK(inp);
4900         }
4901         /* pull from vtag hash */
4902         LIST_REMOVE(stcb, sctp_asocs);
4903         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4904             inp->sctp_lport, stcb->rport);
4905
4906         /*
4907          * Now restop the timers to be sure this is paranoia at is finest!
4908          */
4909         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4910         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4911         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4912         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4913         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4914         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4915         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4916         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4917                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4918                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4919                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4920         }
4921
4922         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4923         /*
4924          * The chunk lists and such SHOULD be empty but we check them just
4925          * in case.
4926          */
4927         /* anything on the wheel needs to be removed */
4928         for (i = 0; i < asoc->streamoutcnt; i++) {
4929                 struct sctp_stream_out *outs;
4930
4931                 outs = &asoc->strmout[i];
4932                 /* now clean up any chunks here */
4933                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4934                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4935                         sctp_free_spbufspace(stcb, asoc, sp);
4936                         if (sp->data) {
4937                                 if (so) {
4938                                         /* Still an open socket - report */
4939                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4940                                             0, (void *)sp, SCTP_SO_LOCKED);
4941                                 }
4942                                 if (sp->data) {
4943                                         sctp_m_freem(sp->data);
4944                                         sp->data = NULL;
4945                                         sp->tail_mbuf = NULL;
4946                                         sp->length = 0;
4947                                 }
4948                         }
4949                         if (sp->net) {
4950                                 sctp_free_remote_addr(sp->net);
4951                                 sp->net = NULL;
4952                         }
4953                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4954                 }
4955         }
4956         /* sa_ignore FREED_MEMORY */
4957         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4958                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4959                 SCTP_FREE(strrst, SCTP_M_STRESET);
4960         }
4961         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4962                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4963                 if (sq->data) {
4964                         sctp_m_freem(sq->data);
4965                         sq->data = NULL;
4966                 }
4967                 sctp_free_remote_addr(sq->whoFrom);
4968                 sq->whoFrom = NULL;
4969                 sq->stcb = NULL;
4970                 /* Free the ctl entry */
4971                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4972                 SCTP_DECR_READQ_COUNT();
4973                 /* sa_ignore FREED_MEMORY */
4974         }
4975         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4976                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4977                 if (chk->data) {
4978                         sctp_m_freem(chk->data);
4979                         chk->data = NULL;
4980                 }
4981                 if (chk->holds_key_ref)
4982                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4983                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4984                 SCTP_DECR_CHK_COUNT();
4985                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4986                 asoc->free_chunk_cnt--;
4987                 /* sa_ignore FREED_MEMORY */
4988         }
4989         /* pending send queue SHOULD be empty */
4990         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4991                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4992                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4993 #ifdef INVARIANTS
4994                 } else {
4995                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4996 #endif
4997                 }
4998                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4999                 if (chk->data) {
5000                         if (so) {
5001                                 /* Still a socket? */
5002                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5003                                     0, chk, SCTP_SO_LOCKED);
5004                         }
5005                         if (chk->data) {
5006                                 sctp_m_freem(chk->data);
5007                                 chk->data = NULL;
5008                         }
5009                 }
5010                 if (chk->holds_key_ref)
5011                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5012                 if (chk->whoTo) {
5013                         sctp_free_remote_addr(chk->whoTo);
5014                         chk->whoTo = NULL;
5015                 }
5016                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5017                 SCTP_DECR_CHK_COUNT();
5018                 /* sa_ignore FREED_MEMORY */
5019         }
5020         /* sent queue SHOULD be empty */
5021         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5022                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5023                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5024                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5025 #ifdef INVARIANTS
5026                         } else {
5027                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5028 #endif
5029                         }
5030                 }
5031                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5032                 if (chk->data) {
5033                         if (so) {
5034                                 /* Still a socket? */
5035                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5036                                     0, chk, SCTP_SO_LOCKED);
5037                         }
5038                         if (chk->data) {
5039                                 sctp_m_freem(chk->data);
5040                                 chk->data = NULL;
5041                         }
5042                 }
5043                 if (chk->holds_key_ref)
5044                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5045                 sctp_free_remote_addr(chk->whoTo);
5046                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5047                 SCTP_DECR_CHK_COUNT();
5048                 /* sa_ignore FREED_MEMORY */
5049         }
5050 #ifdef INVARIANTS
5051         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5052                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5053                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5054                 }
5055         }
5056 #endif
5057         /* control queue MAY not be empty */
5058         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5059                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5060                 if (chk->data) {
5061                         sctp_m_freem(chk->data);
5062                         chk->data = NULL;
5063                 }
5064                 if (chk->holds_key_ref)
5065                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5066                 sctp_free_remote_addr(chk->whoTo);
5067                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5068                 SCTP_DECR_CHK_COUNT();
5069                 /* sa_ignore FREED_MEMORY */
5070         }
5071         /* ASCONF queue MAY not be empty */
5072         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5073                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5074                 if (chk->data) {
5075                         sctp_m_freem(chk->data);
5076                         chk->data = NULL;
5077                 }
5078                 if (chk->holds_key_ref)
5079                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5080                 sctp_free_remote_addr(chk->whoTo);
5081                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5082                 SCTP_DECR_CHK_COUNT();
5083                 /* sa_ignore FREED_MEMORY */
5084         }
5085         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5086                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5087                 if (chk->data) {
5088                         sctp_m_freem(chk->data);
5089                         chk->data = NULL;
5090                 }
5091                 if (chk->holds_key_ref)
5092                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5093                 sctp_free_remote_addr(chk->whoTo);
5094                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5095                 SCTP_DECR_CHK_COUNT();
5096                 /* sa_ignore FREED_MEMORY */
5097         }
5098
5099         if (asoc->mapping_array) {
5100                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5101                 asoc->mapping_array = NULL;
5102         }
5103         if (asoc->nr_mapping_array) {
5104                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5105                 asoc->nr_mapping_array = NULL;
5106         }
5107         /* the stream outs */
5108         if (asoc->strmout) {
5109                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5110                 asoc->strmout = NULL;
5111         }
5112         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5113         if (asoc->strmin) {
5114                 struct sctp_queued_to_read *ctl, *nctl;
5115
5116                 for (i = 0; i < asoc->streamincnt; i++) {
5117                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5118                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5119                                 sctp_free_remote_addr(ctl->whoFrom);
5120                                 if (ctl->data) {
5121                                         sctp_m_freem(ctl->data);
5122                                         ctl->data = NULL;
5123                                 }
5124                                 /*
5125                                  * We don't free the address here since all
5126                                  * the net's were freed above.
5127                                  */
5128                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5129                                 SCTP_DECR_READQ_COUNT();
5130                         }
5131                 }
5132                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5133                 asoc->strmin = NULL;
5134         }
5135         asoc->streamincnt = 0;
5136         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5137 #ifdef INVARIANTS
5138                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5139                         panic("no net's left alloc'ed, or list points to itself");
5140                 }
5141 #endif
5142                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5143                 sctp_free_remote_addr(net);
5144         }
5145         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5146                 /* sa_ignore FREED_MEMORY */
5147                 sctp_remove_laddr(laddr);
5148         }
5149
5150         /* pending asconf (address) parameters */
5151         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5152                 /* sa_ignore FREED_MEMORY */
5153                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5154                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5155         }
5156         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5157                 /* sa_ignore FREED_MEMORY */
5158                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5159                 if (aack->data != NULL) {
5160                         sctp_m_freem(aack->data);
5161                 }
5162                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5163         }
5164         /* clean up auth stuff */
5165         if (asoc->local_hmacs)
5166                 sctp_free_hmaclist(asoc->local_hmacs);
5167         if (asoc->peer_hmacs)
5168                 sctp_free_hmaclist(asoc->peer_hmacs);
5169
5170         if (asoc->local_auth_chunks)
5171                 sctp_free_chunklist(asoc->local_auth_chunks);
5172         if (asoc->peer_auth_chunks)
5173                 sctp_free_chunklist(asoc->peer_auth_chunks);
5174
5175         sctp_free_authinfo(&asoc->authinfo);
5176
5177         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5178                 LIST_REMOVE(shared_key, next);
5179                 sctp_free_sharedkey(shared_key);
5180                 /* sa_ignore FREED_MEMORY */
5181         }
5182
5183         /* Insert new items here :> */
5184
5185         /* Get rid of LOCK */
5186         SCTP_TCB_UNLOCK(stcb);
5187         SCTP_TCB_LOCK_DESTROY(stcb);
5188         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5189         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5190                 SCTP_INP_INFO_WUNLOCK();
5191                 SCTP_INP_RLOCK(inp);
5192         }
5193 #ifdef SCTP_TRACK_FREED_ASOCS
5194         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5195                 /* now clean up the tasoc itself */
5196                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5197                 SCTP_DECR_ASOC_COUNT();
5198         } else {
5199                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5200         }
5201 #else
5202         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5203         SCTP_DECR_ASOC_COUNT();
5204 #endif
5205         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5206                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5207                         /*
5208                          * If its NOT the inp_free calling us AND sctp_close
5209                          * as been called, we call back...
5210                          */
5211                         SCTP_INP_RUNLOCK(inp);
5212                         /*
5213                          * This will start the kill timer (if we are the
5214                          * last one) since we hold an increment yet. But
5215                          * this is the only safe way to do this since
5216                          * otherwise if the socket closes at the same time
5217                          * we are here we might collide in the cleanup.
5218                          */
5219                         sctp_inpcb_free(inp,
5220                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5221                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5222                         SCTP_INP_DECR_REF(inp);
5223                         goto out_of;
5224                 } else {
5225                         /* The socket is still open. */
5226                         SCTP_INP_DECR_REF(inp);
5227                 }
5228         }
5229         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5230                 SCTP_INP_RUNLOCK(inp);
5231         }
5232 out_of:
5233         /* destroyed the asoc */
5234 #ifdef SCTP_LOG_CLOSING
5235         sctp_log_closing(inp, NULL, 11);
5236 #endif
5237         return (1);
5238 }
5239
5240
5241
5242 /*
5243  * determine if a destination is "reachable" based upon the addresses bound
5244  * to the current endpoint (e.g. only v4 or v6 currently bound)
5245  */
5246 /*
5247  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5248  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5249  * types bound as its endpoint
5250  */
5251 int
5252 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5253 {
5254         struct sctp_inpcb *inp;
5255         int answer;
5256
5257         /*
5258          * No locks here, the TCB, in all cases is already locked and an
5259          * assoc is up. There is either a INP lock by the caller applied (in
5260          * asconf case when deleting an address) or NOT in the HB case,
5261          * however if HB then the INP increment is up and the INP will not
5262          * be removed (on top of the fact that we have a TCB lock). So we
5263          * only want to read the sctp_flags, which is either bound-all or
5264          * not.. no protection needed since once an assoc is up you can't be
5265          * changing your binding.
5266          */
5267         inp = stcb->sctp_ep;
5268         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5269                 /* if bound all, destination is not restricted */
5270                 /*
5271                  * RRS: Question during lock work: Is this correct? If you
5272                  * are bound-all you still might need to obey the V4--V6
5273                  * flags??? IMO this bound-all stuff needs to be removed!
5274                  */
5275                 return (1);
5276         }
5277         /* NOTE: all "scope" checks are done when local addresses are added */
5278         switch (destaddr->sa_family) {
5279 #ifdef INET6
5280         case AF_INET6:
5281                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5282                 break;
5283 #endif
5284 #ifdef INET
5285         case AF_INET:
5286                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5287                 break;
5288 #endif
5289         default:
5290                 /* invalid family, so it's unreachable */
5291                 answer = 0;
5292                 break;
5293         }
5294         return (answer);
5295 }
5296
5297 /*
5298  * update the inp_vflags on an endpoint
5299  */
5300 static void
5301 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5302 {
5303         struct sctp_laddr *laddr;
5304
5305         /* first clear the flag */
5306         inp->ip_inp.inp.inp_vflag = 0;
5307         /* set the flag based on addresses on the ep list */
5308         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5309                 if (laddr->ifa == NULL) {
5310                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5311                             __FUNCTION__);
5312                         continue;
5313                 }
5314                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5315                         continue;
5316                 }
5317                 switch (laddr->ifa->address.sa.sa_family) {
5318 #ifdef INET6
5319                 case AF_INET6:
5320                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5321                         break;
5322 #endif
5323 #ifdef INET
5324                 case AF_INET:
5325                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5326                         break;
5327 #endif
5328                 default:
5329                         break;
5330                 }
5331         }
5332 }
5333
5334 /*
5335  * Add the address to the endpoint local address list There is nothing to be
5336  * done if we are bound to all addresses
5337  */
5338 void
5339 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5340 {
5341         struct sctp_laddr *laddr;
5342         int fnd, error = 0;
5343
5344         fnd = 0;
5345
5346         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5347                 /* You are already bound to all. You have it already */
5348                 return;
5349         }
5350 #ifdef INET6
5351         if (ifa->address.sa.sa_family == AF_INET6) {
5352                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5353                         /* Can't bind a non-useable addr. */
5354                         return;
5355                 }
5356         }
5357 #endif
5358         /* first, is it already present? */
5359         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5360                 if (laddr->ifa == ifa) {
5361                         fnd = 1;
5362                         break;
5363                 }
5364         }
5365
5366         if (fnd == 0) {
5367                 /* Not in the ep list */
5368                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5369                 if (error != 0)
5370                         return;
5371                 inp->laddr_count++;
5372                 /* update inp_vflag flags */
5373                 switch (ifa->address.sa.sa_family) {
5374 #ifdef INET6
5375                 case AF_INET6:
5376                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5377                         break;
5378 #endif
5379 #ifdef INET
5380                 case AF_INET:
5381                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5382                         break;
5383 #endif
5384                 default:
5385                         break;
5386                 }
5387         }
5388         return;
5389 }
5390
5391
5392 /*
5393  * select a new (hopefully reachable) destination net (should only be used
5394  * when we deleted an ep addr that is the only usable source address to reach
5395  * the destination net)
5396  */
5397 static void
5398 sctp_select_primary_destination(struct sctp_tcb *stcb)
5399 {
5400         struct sctp_nets *net;
5401
5402         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5403                 /* for now, we'll just pick the first reachable one we find */
5404                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5405                         continue;
5406                 if (sctp_destination_is_reachable(stcb,
5407                     (struct sockaddr *)&net->ro._l_addr)) {
5408                         /* found a reachable destination */
5409                         stcb->asoc.primary_destination = net;
5410                 }
5411         }
5412         /* I can't there from here! ...we're gonna die shortly... */
5413 }
5414
5415
5416 /*
5417  * Delete the address from the endpoint local address list There is nothing
5418  * to be done if we are bound to all addresses
5419  */
5420 void
5421 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5422 {
5423         struct sctp_laddr *laddr;
5424         int fnd;
5425
5426         fnd = 0;
5427         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5428                 /* You are already bound to all. You have it already */
5429                 return;
5430         }
5431         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5432                 if (laddr->ifa == ifa) {
5433                         fnd = 1;
5434                         break;
5435                 }
5436         }
5437         if (fnd && (inp->laddr_count < 2)) {
5438                 /* can't delete unless there are at LEAST 2 addresses */
5439                 return;
5440         }
5441         if (fnd) {
5442                 /*
5443                  * clean up any use of this address go through our
5444                  * associations and clear any last_used_address that match
5445                  * this one for each assoc, see if a new primary_destination
5446                  * is needed
5447                  */
5448                 struct sctp_tcb *stcb;
5449
5450                 /* clean up "next_addr_touse" */
5451                 if (inp->next_addr_touse == laddr)
5452                         /* delete this address */
5453                         inp->next_addr_touse = NULL;
5454
5455                 /* clean up "last_used_address" */
5456                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5457                         struct sctp_nets *net;
5458
5459                         SCTP_TCB_LOCK(stcb);
5460                         if (stcb->asoc.last_used_address == laddr)
5461                                 /* delete this address */
5462                                 stcb->asoc.last_used_address = NULL;
5463                         /*
5464                          * Now spin through all the nets and purge any ref
5465                          * to laddr
5466                          */
5467                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5468                                 if (net->ro._s_addr &&
5469                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5470                                         /* Yep, purge src address selected */
5471                                         sctp_rtentry_t *rt;
5472
5473                                         /* delete this address if cached */
5474                                         rt = net->ro.ro_rt;
5475                                         if (rt != NULL) {
5476                                                 RTFREE(rt);
5477                                                 net->ro.ro_rt = NULL;
5478                                         }
5479                                         sctp_free_ifa(net->ro._s_addr);
5480                                         net->ro._s_addr = NULL;
5481                                         net->src_addr_selected = 0;
5482                                 }
5483                         }
5484                         SCTP_TCB_UNLOCK(stcb);
5485                 }               /* for each tcb */
5486                 /* remove it from the ep list */
5487                 sctp_remove_laddr(laddr);
5488                 inp->laddr_count--;
5489                 /* update inp_vflag flags */
5490                 sctp_update_ep_vflag(inp);
5491         }
5492         return;
5493 }
5494
5495 /*
5496  * Add the address to the TCB local address restricted list.
5497  * This is a "pending" address list (eg. addresses waiting for an
5498  * ASCONF-ACK response) and cannot be used as a valid source address.
5499  */
5500 void
5501 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5502 {
5503         struct sctp_laddr *laddr;
5504         struct sctpladdr *list;
5505
5506         /*
5507          * Assumes TCB is locked.. and possibly the INP. May need to
5508          * confirm/fix that if we need it and is not the case.
5509          */
5510         list = &stcb->asoc.sctp_restricted_addrs;
5511
5512 #ifdef INET6
5513         if (ifa->address.sa.sa_family == AF_INET6) {
5514                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5515                         /* Can't bind a non-existent addr. */
5516                         return;
5517                 }
5518         }
5519 #endif
5520         /* does the address already exist? */
5521         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5522                 if (laddr->ifa == ifa) {
5523                         return;
5524                 }
5525         }
5526
5527         /* add to the list */
5528         (void)sctp_insert_laddr(list, ifa, 0);
5529         return;
5530 }
5531
5532 /*
5533  * insert an laddr entry with the given ifa for the desired list
5534  */
5535 int
5536 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5537 {
5538         struct sctp_laddr *laddr;
5539
5540         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5541         if (laddr == NULL) {
5542                 /* out of memory? */
5543                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5544                 return (EINVAL);
5545         }
5546         SCTP_INCR_LADDR_COUNT();
5547         bzero(laddr, sizeof(*laddr));
5548         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5549         laddr->ifa = ifa;
5550         laddr->action = act;
5551         atomic_add_int(&ifa->refcount, 1);
5552         /* insert it */
5553         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5554
5555         return (0);
5556 }
5557
5558 /*
5559  * Remove an laddr entry from the local address list (on an assoc)
5560  */
5561 void
5562 sctp_remove_laddr(struct sctp_laddr *laddr)
5563 {
5564
5565         /* remove from the list */
5566         LIST_REMOVE(laddr, sctp_nxt_addr);
5567         sctp_free_ifa(laddr->ifa);
5568         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5569         SCTP_DECR_LADDR_COUNT();
5570 }
5571
5572 /*
5573  * Remove a local address from the TCB local address restricted list
5574  */
5575 void
5576 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5577 {
5578         struct sctp_inpcb *inp;
5579         struct sctp_laddr *laddr;
5580
5581         /*
5582          * This is called by asconf work. It is assumed that a) The TCB is
5583          * locked and b) The INP is locked. This is true in as much as I can
5584          * trace through the entry asconf code where I did these locks.
5585          * Again, the ASCONF code is a bit different in that it does lock
5586          * the INP during its work often times. This must be since we don't
5587          * want other proc's looking up things while what they are looking
5588          * up is changing :-D
5589          */
5590
5591         inp = stcb->sctp_ep;
5592         /* if subset bound and don't allow ASCONF's, can't delete last */
5593         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5594             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5595                 if (stcb->sctp_ep->laddr_count < 2) {
5596                         /* can't delete last address */
5597                         return;
5598                 }
5599         }
5600         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5601                 /* remove the address if it exists */
5602                 if (laddr->ifa == NULL)
5603                         continue;
5604                 if (laddr->ifa == ifa) {
5605                         sctp_remove_laddr(laddr);
5606                         return;
5607                 }
5608         }
5609
5610         /* address not found! */
5611         return;
5612 }
5613
5614 /*
5615  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5616  */
5617 /* sysctl */
5618 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5619 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5620
5621
5622
5623 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5624 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5625 int *sctp_cpuarry = NULL;
5626 void
5627 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5628 {
5629         /* Queue a packet to a processor for the specified core */
5630         struct sctp_mcore_queue *qent;
5631         struct sctp_mcore_ctrl *wkq;
5632         int need_wake = 0;
5633
5634         if (sctp_mcore_workers == NULL) {
5635                 /* Something went way bad during setup */
5636                 sctp_input_with_port(m, off, 0);
5637                 return;
5638         }
5639         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5640             (sizeof(struct sctp_mcore_queue)),
5641             SCTP_M_MCORE);
5642         if (qent == NULL) {
5643                 /* This is trouble  */
5644                 sctp_input_with_port(m, off, 0);
5645                 return;
5646         }
5647         qent->vn = curvnet;
5648         qent->m = m;
5649         qent->off = off;
5650         qent->v6 = 0;
5651         wkq = &sctp_mcore_workers[cpu_to_use];
5652         SCTP_MCORE_QLOCK(wkq);
5653
5654         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5655         if (wkq->running == 0) {
5656                 need_wake = 1;
5657         }
5658         SCTP_MCORE_QUNLOCK(wkq);
5659         if (need_wake) {
5660                 wakeup(&wkq->running);
5661         }
5662 }
5663
5664 static void
5665 sctp_mcore_thread(void *arg)
5666 {
5667
5668         struct sctp_mcore_ctrl *wkq;
5669         struct sctp_mcore_queue *qent;
5670
5671         wkq = (struct sctp_mcore_ctrl *)arg;
5672         struct mbuf *m;
5673         int off, v6;
5674
5675         /* Wait for first tickle */
5676         SCTP_MCORE_LOCK(wkq);
5677         wkq->running = 0;
5678         msleep(&wkq->running,
5679             &wkq->core_mtx,
5680             0, "wait for pkt", 0);
5681         SCTP_MCORE_UNLOCK(wkq);
5682
5683         /* Bind to our cpu */
5684         thread_lock(curthread);
5685         sched_bind(curthread, wkq->cpuid);
5686         thread_unlock(curthread);
5687
5688         /* Now lets start working */
5689         SCTP_MCORE_LOCK(wkq);
5690         /* Now grab lock and go */
5691         for (;;) {
5692                 SCTP_MCORE_QLOCK(wkq);
5693 skip_sleep:
5694                 wkq->running = 1;
5695                 qent = TAILQ_FIRST(&wkq->que);
5696                 if (qent) {
5697                         TAILQ_REMOVE(&wkq->que, qent, next);
5698                         SCTP_MCORE_QUNLOCK(wkq);
5699                         CURVNET_SET(qent->vn);
5700                         m = qent->m;
5701                         off = qent->off;
5702                         v6 = qent->v6;
5703                         SCTP_FREE(qent, SCTP_M_MCORE);
5704                         if (v6 == 0) {
5705                                 sctp_input_with_port(m, off, 0);
5706                         } else {
5707                                 SCTP_PRINTF("V6 not yet supported\n");
5708                                 sctp_m_freem(m);
5709                         }
5710                         CURVNET_RESTORE();
5711                         SCTP_MCORE_QLOCK(wkq);
5712                 }
5713                 wkq->running = 0;
5714                 if (!TAILQ_EMPTY(&wkq->que)) {
5715                         goto skip_sleep;
5716                 }
5717                 SCTP_MCORE_QUNLOCK(wkq);
5718                 msleep(&wkq->running,
5719                     &wkq->core_mtx,
5720                     0, "wait for pkt", 0);
5721         }
5722 }
5723
5724 static void
5725 sctp_startup_mcore_threads(void)
5726 {
5727         int i, cpu;
5728
5729         if (mp_ncpus == 1)
5730                 return;
5731
5732         if (sctp_mcore_workers != NULL) {
5733                 /*
5734                  * Already been here in some previous vnet?
5735                  */
5736                 return;
5737         }
5738         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5739             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5740             SCTP_M_MCORE);
5741         if (sctp_mcore_workers == NULL) {
5742                 /* TSNH I hope */
5743                 return;
5744         }
5745         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5746             sizeof(struct sctp_mcore_ctrl)));
5747         /* Init the structures */
5748         for (i = 0; i <= mp_maxid; i++) {
5749                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5750                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5751                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5752                 sctp_mcore_workers[i].cpuid = i;
5753         }
5754         if (sctp_cpuarry == NULL) {
5755                 SCTP_MALLOC(sctp_cpuarry, int *,
5756                     (mp_ncpus * sizeof(int)),
5757                     SCTP_M_MCORE);
5758                 i = 0;
5759                 CPU_FOREACH(cpu) {
5760                         sctp_cpuarry[i] = cpu;
5761                         i++;
5762                 }
5763         }
5764         /* Now start them all */
5765         CPU_FOREACH(cpu) {
5766                 (void)kproc_create(sctp_mcore_thread,
5767                     (void *)&sctp_mcore_workers[cpu],
5768                     &sctp_mcore_workers[cpu].thread_proc,
5769                     RFPROC,
5770                     SCTP_KTHREAD_PAGES,
5771                     SCTP_MCORE_NAME);
5772
5773         }
5774 }
5775
5776 #endif
5777
5778 void
5779 sctp_pcb_init()
5780 {
5781         /*
5782          * SCTP initialization for the PCB structures should be called by
5783          * the sctp_init() funciton.
5784          */
5785         int i;
5786         struct timeval tv;
5787
5788         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5789                 /* error I was called twice */
5790                 return;
5791         }
5792         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5793
5794 #if defined(SCTP_LOCAL_TRACE_BUF)
5795         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5796 #endif
5797 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5798         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5799             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5800             SCTP_M_MCORE);
5801 #endif
5802         (void)SCTP_GETTIME_TIMEVAL(&tv);
5803 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5804         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5805         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5806         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5807 #else
5808         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5809         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5810         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5811 #endif
5812         /* init the empty list of (All) Endpoints */
5813         LIST_INIT(&SCTP_BASE_INFO(listhead));
5814
5815
5816         /* init the hash table of endpoints */
5817         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5818         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5819         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5820         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5821             &SCTP_BASE_INFO(hashasocmark));
5822         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5823             &SCTP_BASE_INFO(hashmark));
5824         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5825             &SCTP_BASE_INFO(hashtcpmark));
5826         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5827
5828
5829         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5830             &SCTP_BASE_INFO(hashvrfmark));
5831
5832         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5833             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5834         /* init the zones */
5835         /*
5836          * FIX ME: Should check for NULL returns, but if it does fail we are
5837          * doomed to panic anyways... add later maybe.
5838          */
5839         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5840             sizeof(struct sctp_inpcb), maxsockets);
5841
5842         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5843             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5846             sizeof(struct sctp_laddr),
5847             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5848
5849         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5850             sizeof(struct sctp_nets),
5851             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5852
5853         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5854             sizeof(struct sctp_tmit_chunk),
5855             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5856
5857         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5858             sizeof(struct sctp_queued_to_read),
5859             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5860
5861         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5862             sizeof(struct sctp_stream_queue_pending),
5863             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5864
5865         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5866             sizeof(struct sctp_asconf),
5867             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5868
5869         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5870             sizeof(struct sctp_asconf_ack),
5871             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5872
5873
5874         /* Master Lock INIT for info structure */
5875         SCTP_INP_INFO_LOCK_INIT();
5876         SCTP_STATLOG_INIT_LOCK();
5877
5878         SCTP_IPI_COUNT_INIT();
5879         SCTP_IPI_ADDR_INIT();
5880 #ifdef SCTP_PACKET_LOGGING
5881         SCTP_IP_PKTLOG_INIT();
5882 #endif
5883         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5884
5885         SCTP_WQ_ADDR_INIT();
5886         /* not sure if we need all the counts */
5887         SCTP_BASE_INFO(ipi_count_ep) = 0;
5888         /* assoc/tcb zone info */
5889         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5890         /* local addrlist zone info */
5891         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5892         /* remote addrlist zone info */
5893         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5894         /* chunk info */
5895         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5896
5897         /* socket queue zone info */
5898         SCTP_BASE_INFO(ipi_count_readq) = 0;
5899
5900         /* stream out queue cont */
5901         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5902
5903         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5904         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5905
5906         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5907
5908         /* Init the TIMEWAIT list */
5909         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5910                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5911         }
5912         sctp_startup_iterator();
5913
5914 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5915         sctp_startup_mcore_threads();
5916 #endif
5917
5918         /*
5919          * INIT the default VRF which for BSD is the only one, other O/S's
5920          * may have more. But initially they must start with one and then
5921          * add the VRF's as addresses are added.
5922          */
5923         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5924 }
5925
5926 /*
5927  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5928  */
5929 void
5930 sctp_pcb_finish(void)
5931 {
5932         struct sctp_vrflist *vrf_bucket;
5933         struct sctp_vrf *vrf, *nvrf;
5934         struct sctp_ifn *ifn, *nifn;
5935         struct sctp_ifa *ifa, *nifa;
5936         struct sctpvtaghead *chain;
5937         struct sctp_tagblock *twait_block, *prev_twait_block;
5938         struct sctp_laddr *wi, *nwi;
5939         int i;
5940         struct sctp_iterator *it, *nit;
5941
5942         /*
5943          * In FreeBSD the iterator thread never exits but we do clean up.
5944          * The only way FreeBSD reaches here is if we have VRF's but we
5945          * still add the ifdef to make it compile on old versions.
5946          */
5947         SCTP_IPI_ITERATOR_WQ_LOCK();
5948         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5949                 if (it->vn != curvnet) {
5950                         continue;
5951                 }
5952                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5953                 if (it->function_atend != NULL) {
5954                         (*it->function_atend) (it->pointer, it->val);
5955                 }
5956                 SCTP_FREE(it, SCTP_M_ITER);
5957         }
5958         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5959         SCTP_ITERATOR_LOCK();
5960         if ((sctp_it_ctl.cur_it) &&
5961             (sctp_it_ctl.cur_it->vn == curvnet)) {
5962                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5963         }
5964         SCTP_ITERATOR_UNLOCK();
5965         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5966         SCTP_WQ_ADDR_LOCK();
5967         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5968                 LIST_REMOVE(wi, sctp_nxt_addr);
5969                 SCTP_DECR_LADDR_COUNT();
5970                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5971         }
5972         SCTP_WQ_ADDR_UNLOCK();
5973
5974         /*
5975          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5976          * destroyed first).
5977          */
5978         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5979         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5980                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5981                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5982                                 /* free the ifa */
5983                                 LIST_REMOVE(ifa, next_bucket);
5984                                 LIST_REMOVE(ifa, next_ifa);
5985                                 SCTP_FREE(ifa, SCTP_M_IFA);
5986                         }
5987                         /* free the ifn */
5988                         LIST_REMOVE(ifn, next_bucket);
5989                         LIST_REMOVE(ifn, next_ifn);
5990                         SCTP_FREE(ifn, SCTP_M_IFN);
5991                 }
5992                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5993                 /* free the vrf */
5994                 LIST_REMOVE(vrf, next_vrf);
5995                 SCTP_FREE(vrf, SCTP_M_VRF);
5996         }
5997         /* free the vrf hashes */
5998         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5999         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6000
6001         /*
6002          * free the TIMEWAIT list elements malloc'd in the function
6003          * sctp_add_vtag_to_timewait()...
6004          */
6005         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6006                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6007                 if (!LIST_EMPTY(chain)) {
6008                         prev_twait_block = NULL;
6009                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6010                                 if (prev_twait_block) {
6011                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6012                                 }
6013                                 prev_twait_block = twait_block;
6014                         }
6015                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6016                 }
6017         }
6018
6019         /* free the locks and mutexes */
6020 #ifdef SCTP_PACKET_LOGGING
6021         SCTP_IP_PKTLOG_DESTROY();
6022 #endif
6023         SCTP_IPI_ADDR_DESTROY();
6024         SCTP_STATLOG_DESTROY();
6025         SCTP_INP_INFO_LOCK_DESTROY();
6026
6027         SCTP_WQ_ADDR_DESTROY();
6028
6029         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6030         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6031         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6032         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6033         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6034         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6035         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6036         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6037         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6038         /* Get rid of other stuff to */
6039         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6040                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6041         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6042                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6043         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6044                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6045 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6046         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6047 #endif
6048 }
6049
6050
6051 int
6052 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6053     int offset, int limit,
6054     struct sockaddr *src, struct sockaddr *dst,
6055     struct sockaddr *altsa)
6056 {
6057         /*
6058          * grub through the INIT pulling addresses and loading them to the
6059          * nets structure in the asoc. The from address in the mbuf should
6060          * also be loaded (if it is not already). This routine can be called
6061          * with either INIT or INIT-ACK's as long as the m points to the IP
6062          * packet and the offset points to the beginning of the parameters.
6063          */
6064         struct sctp_inpcb *inp;
6065         struct sctp_nets *net, *nnet, *net_tmp;
6066         struct sctp_paramhdr *phdr, parm_buf;
6067         struct sctp_tcb *stcb_tmp;
6068         uint16_t ptype, plen;
6069         struct sockaddr *sa;
6070         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6071         struct sctp_auth_random *p_random = NULL;
6072         uint16_t random_len = 0;
6073         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6074         struct sctp_auth_hmac_algo *hmacs = NULL;
6075         uint16_t hmacs_len = 0;
6076         uint8_t saw_asconf = 0;
6077         uint8_t saw_asconf_ack = 0;
6078         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6079         struct sctp_auth_chunk_list *chunks = NULL;
6080         uint16_t num_chunks = 0;
6081         sctp_key_t *new_key;
6082         uint32_t keylen;
6083         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6084         uint8_t ecn_allowed;
6085
6086 #ifdef INET
6087         struct sockaddr_in sin;
6088
6089 #endif
6090 #ifdef INET6
6091         struct sockaddr_in6 sin6;
6092
6093 #endif
6094
6095         /* First get the destination address setup too. */
6096 #ifdef INET
6097         memset(&sin, 0, sizeof(sin));
6098         sin.sin_family = AF_INET;
6099         sin.sin_len = sizeof(sin);
6100         sin.sin_port = stcb->rport;
6101 #endif
6102 #ifdef INET6
6103         memset(&sin6, 0, sizeof(sin6));
6104         sin6.sin6_family = AF_INET6;
6105         sin6.sin6_len = sizeof(struct sockaddr_in6);
6106         sin6.sin6_port = stcb->rport;
6107 #endif
6108         if (altsa) {
6109                 sa = altsa;
6110         } else {
6111                 sa = src;
6112         }
6113         /* Turn off ECN until we get through all params */
6114         ecn_allowed = 0;
6115         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6116                 /* mark all addresses that we have currently on the list */
6117                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6118         }
6119         /* does the source address already exist? if so skip it */
6120         inp = stcb->sctp_ep;
6121         atomic_add_int(&stcb->asoc.refcnt, 1);
6122         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6123         atomic_add_int(&stcb->asoc.refcnt, -1);
6124
6125         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6126                 /* we must add the source address */
6127                 /* no scope set here since we have a tcb already. */
6128                 switch (sa->sa_family) {
6129 #ifdef INET
6130                 case AF_INET:
6131                         if (stcb->asoc.scope.ipv4_addr_legal) {
6132                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6133                                         return (-1);
6134                                 }
6135                         }
6136                         break;
6137 #endif
6138 #ifdef INET6
6139                 case AF_INET6:
6140                         if (stcb->asoc.scope.ipv6_addr_legal) {
6141                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6142                                         return (-2);
6143                                 }
6144                         }
6145                         break;
6146 #endif
6147                 default:
6148                         break;
6149                 }
6150         } else {
6151                 if (net_tmp != NULL && stcb_tmp == stcb) {
6152                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6153                 } else if (stcb_tmp != stcb) {
6154                         /* It belongs to another association? */
6155                         if (stcb_tmp)
6156                                 SCTP_TCB_UNLOCK(stcb_tmp);
6157                         return (-3);
6158                 }
6159         }
6160         if (stcb->asoc.state == 0) {
6161                 /* the assoc was freed? */
6162                 return (-4);
6163         }
6164         /*
6165          * peer must explicitly turn this on. This may have been initialized
6166          * to be "on" in order to allow local addr changes while INIT's are
6167          * in flight.
6168          */
6169         stcb->asoc.peer_supports_asconf = 0;
6170         /* now we must go through each of the params. */
6171         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6172         while (phdr) {
6173                 ptype = ntohs(phdr->param_type);
6174                 plen = ntohs(phdr->param_length);
6175                 /*
6176                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6177                  * (uint32_t)ptype, (int)plen);
6178                  */
6179                 if (offset + plen > limit) {
6180                         break;
6181                 }
6182                 if (plen == 0) {
6183                         break;
6184                 }
6185 #ifdef INET
6186                 if (ptype == SCTP_IPV4_ADDRESS) {
6187                         if (stcb->asoc.scope.ipv4_addr_legal) {
6188                                 struct sctp_ipv4addr_param *p4, p4_buf;
6189
6190                                 /* ok get the v4 address and check/add */
6191                                 phdr = sctp_get_next_param(m, offset,
6192                                     (struct sctp_paramhdr *)&p4_buf,
6193                                     sizeof(p4_buf));
6194                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6195                                     phdr == NULL) {
6196                                         return (-5);
6197                                 }
6198                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6199                                 sin.sin_addr.s_addr = p4->addr;
6200                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6201                                         /* Skip multi-cast addresses */
6202                                         goto next_param;
6203                                 }
6204                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6205                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6206                                         goto next_param;
6207                                 }
6208                                 sa = (struct sockaddr *)&sin;
6209                                 inp = stcb->sctp_ep;
6210                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6211                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6212                                     dst, stcb);
6213                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6214
6215                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6216                                     inp == NULL) {
6217                                         /* we must add the source address */
6218                                         /*
6219                                          * no scope set since we have a tcb
6220                                          * already
6221                                          */
6222
6223                                         /*
6224                                          * we must validate the state again
6225                                          * here
6226                                          */
6227                         add_it_now:
6228                                         if (stcb->asoc.state == 0) {
6229                                                 /* the assoc was freed? */
6230                                                 return (-7);
6231                                         }
6232                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6233                                                 return (-8);
6234                                         }
6235                                 } else if (stcb_tmp == stcb) {
6236                                         if (stcb->asoc.state == 0) {
6237                                                 /* the assoc was freed? */
6238                                                 return (-10);
6239                                         }
6240                                         if (net != NULL) {
6241                                                 /* clear flag */
6242                                                 net->dest_state &=
6243                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6244                                         }
6245                                 } else {
6246                                         /*
6247                                          * strange, address is in another
6248                                          * assoc? straighten out locks.
6249                                          */
6250                                         if (stcb_tmp) {
6251                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6252                                                         /*
6253                                                          * in setup state we
6254                                                          * abort this guy
6255                                                          */
6256                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6257                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6258                                                         goto add_it_now;
6259                                                 }
6260                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6261                                         }
6262                                         if (stcb->asoc.state == 0) {
6263                                                 /* the assoc was freed? */
6264                                                 return (-12);
6265                                         }
6266                                         return (-13);
6267                                 }
6268                         }
6269                 } else
6270 #endif
6271 #ifdef INET6
6272                 if (ptype == SCTP_IPV6_ADDRESS) {
6273                         if (stcb->asoc.scope.ipv6_addr_legal) {
6274                                 /* ok get the v6 address and check/add */
6275                                 struct sctp_ipv6addr_param *p6, p6_buf;
6276
6277                                 phdr = sctp_get_next_param(m, offset,
6278                                     (struct sctp_paramhdr *)&p6_buf,
6279                                     sizeof(p6_buf));
6280                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6281                                     phdr == NULL) {
6282                                         return (-14);
6283                                 }
6284                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6285                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6286                                     sizeof(p6->addr));
6287                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6288                                         /* Skip multi-cast addresses */
6289                                         goto next_param;
6290                                 }
6291                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6292                                         /*
6293                                          * Link local make no sense without
6294                                          * scope
6295                                          */
6296                                         goto next_param;
6297                                 }
6298                                 sa = (struct sockaddr *)&sin6;
6299                                 inp = stcb->sctp_ep;
6300                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6301                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6302                                     dst, stcb);
6303                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6304                                 if (stcb_tmp == NULL &&
6305                                     (inp == stcb->sctp_ep || inp == NULL)) {
6306                                         /*
6307                                          * we must validate the state again
6308                                          * here
6309                                          */
6310                         add_it_now6:
6311                                         if (stcb->asoc.state == 0) {
6312                                                 /* the assoc was freed? */
6313                                                 return (-16);
6314                                         }
6315                                         /*
6316                                          * we must add the address, no scope
6317                                          * set
6318                                          */
6319                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6320                                                 return (-17);
6321                                         }
6322                                 } else if (stcb_tmp == stcb) {
6323                                         /*
6324                                          * we must validate the state again
6325                                          * here
6326                                          */
6327                                         if (stcb->asoc.state == 0) {
6328                                                 /* the assoc was freed? */
6329                                                 return (-19);
6330                                         }
6331                                         if (net != NULL) {
6332                                                 /* clear flag */
6333                                                 net->dest_state &=
6334                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6335                                         }
6336                                 } else {
6337                                         /*
6338                                          * strange, address is in another
6339                                          * assoc? straighten out locks.
6340                                          */
6341                                         if (stcb_tmp)
6342                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6343                                                         /*
6344                                                          * in setup state we
6345                                                          * abort this guy
6346                                                          */
6347                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6348                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6349                                                         goto add_it_now6;
6350                                                 }
6351                                         SCTP_TCB_UNLOCK(stcb_tmp);
6352
6353                                         if (stcb->asoc.state == 0) {
6354                                                 /* the assoc was freed? */
6355                                                 return (-21);
6356                                         }
6357                                         return (-22);
6358                                 }
6359                         }
6360                 } else
6361 #endif
6362                 if (ptype == SCTP_ECN_CAPABLE) {
6363                         ecn_allowed = 1;
6364                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6365                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6366                                 struct sctp_adaptation_layer_indication ai,
6367                                                                 *aip;
6368
6369                                 phdr = sctp_get_next_param(m, offset,
6370                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6371                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6372                                 if (aip) {
6373                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6374                                         stcb->asoc.adaptation_needed = 1;
6375                                 }
6376                         }
6377                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6378                         struct sctp_asconf_addr_param lstore, *fee;
6379                         int lptype;
6380                         struct sockaddr *lsa = NULL;
6381
6382 #ifdef INET
6383                         struct sctp_asconf_addrv4_param *fii;
6384
6385 #endif
6386
6387                         stcb->asoc.peer_supports_asconf = 1;
6388                         if (plen > sizeof(lstore)) {
6389                                 return (-23);
6390                         }
6391                         phdr = sctp_get_next_param(m, offset,
6392                             (struct sctp_paramhdr *)&lstore,
6393                             min(plen, sizeof(lstore)));
6394                         if (phdr == NULL) {
6395                                 return (-24);
6396                         }
6397                         fee = (struct sctp_asconf_addr_param *)phdr;
6398                         lptype = ntohs(fee->addrp.ph.param_type);
6399                         switch (lptype) {
6400 #ifdef INET
6401                         case SCTP_IPV4_ADDRESS:
6402                                 if (plen !=
6403                                     sizeof(struct sctp_asconf_addrv4_param)) {
6404                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6405                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6406                                             plen);
6407                                 } else {
6408                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6409                                         sin.sin_addr.s_addr = fii->addrp.addr;
6410                                         lsa = (struct sockaddr *)&sin;
6411                                 }
6412                                 break;
6413 #endif
6414 #ifdef INET6
6415                         case SCTP_IPV6_ADDRESS:
6416                                 if (plen !=
6417                                     sizeof(struct sctp_asconf_addr_param)) {
6418                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6419                                             (int)sizeof(struct sctp_asconf_addr_param),
6420                                             plen);
6421                                 } else {
6422                                         memcpy(sin6.sin6_addr.s6_addr,
6423                                             fee->addrp.addr,
6424                                             sizeof(fee->addrp.addr));
6425                                         lsa = (struct sockaddr *)&sin6;
6426                                 }
6427                                 break;
6428 #endif
6429                         default:
6430                                 break;
6431                         }
6432                         if (lsa) {
6433                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6434                         }
6435                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6436                         stcb->asoc.peer_supports_nat = 1;
6437                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6438                         /* Peer supports pr-sctp */
6439                         stcb->asoc.peer_supports_prsctp = 1;
6440                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6441                         /* A supported extension chunk */
6442                         struct sctp_supported_chunk_types_param *pr_supported;
6443                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6444                         int num_ent, i;
6445
6446                         phdr = sctp_get_next_param(m, offset,
6447                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6448                         if (phdr == NULL) {
6449                                 return (-25);
6450                         }
6451                         stcb->asoc.peer_supports_asconf = 0;
6452                         stcb->asoc.peer_supports_prsctp = 0;
6453                         stcb->asoc.peer_supports_pktdrop = 0;
6454                         stcb->asoc.peer_supports_strreset = 0;
6455                         stcb->asoc.peer_supports_nr_sack = 0;
6456                         stcb->asoc.peer_supports_auth = 0;
6457                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6458                         num_ent = plen - sizeof(struct sctp_paramhdr);
6459                         for (i = 0; i < num_ent; i++) {
6460                                 switch (pr_supported->chunk_types[i]) {
6461                                 case SCTP_ASCONF:
6462                                 case SCTP_ASCONF_ACK:
6463                                         stcb->asoc.peer_supports_asconf = 1;
6464                                         break;
6465                                 case SCTP_FORWARD_CUM_TSN:
6466                                         stcb->asoc.peer_supports_prsctp = 1;
6467                                         break;
6468                                 case SCTP_PACKET_DROPPED:
6469                                         stcb->asoc.peer_supports_pktdrop = 1;
6470                                         break;
6471                                 case SCTP_NR_SELECTIVE_ACK:
6472                                         stcb->asoc.peer_supports_nr_sack = 1;
6473                                         break;
6474                                 case SCTP_STREAM_RESET:
6475                                         stcb->asoc.peer_supports_strreset = 1;
6476                                         break;
6477                                 case SCTP_AUTHENTICATION:
6478                                         stcb->asoc.peer_supports_auth = 1;
6479                                         break;
6480                                 default:
6481                                         /* one I have not learned yet */
6482                                         break;
6483
6484                                 }
6485                         }
6486                 } else if (ptype == SCTP_RANDOM) {
6487                         if (plen > sizeof(random_store))
6488                                 break;
6489                         if (got_random) {
6490                                 /* already processed a RANDOM */
6491                                 goto next_param;
6492                         }
6493                         phdr = sctp_get_next_param(m, offset,
6494                             (struct sctp_paramhdr *)random_store,
6495                             min(sizeof(random_store), plen));
6496                         if (phdr == NULL)
6497                                 return (-26);
6498                         p_random = (struct sctp_auth_random *)phdr;
6499                         random_len = plen - sizeof(*p_random);
6500                         /* enforce the random length */
6501                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6502                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6503                                 return (-27);
6504                         }
6505                         got_random = 1;
6506                 } else if (ptype == SCTP_HMAC_LIST) {
6507                         int num_hmacs;
6508                         int i;
6509
6510                         if (plen > sizeof(hmacs_store))
6511                                 break;
6512                         if (got_hmacs) {
6513                                 /* already processed a HMAC list */
6514                                 goto next_param;
6515                         }
6516                         phdr = sctp_get_next_param(m, offset,
6517                             (struct sctp_paramhdr *)hmacs_store,
6518                             min(plen, sizeof(hmacs_store)));
6519                         if (phdr == NULL)
6520                                 return (-28);
6521                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6522                         hmacs_len = plen - sizeof(*hmacs);
6523                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6524                         /* validate the hmac list */
6525                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6526                                 return (-29);
6527                         }
6528                         if (stcb->asoc.peer_hmacs != NULL)
6529                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6530                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6531                         if (stcb->asoc.peer_hmacs != NULL) {
6532                                 for (i = 0; i < num_hmacs; i++) {
6533                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6534                                             ntohs(hmacs->hmac_ids[i]));
6535                                 }
6536                         }
6537                         got_hmacs = 1;
6538                 } else if (ptype == SCTP_CHUNK_LIST) {
6539                         int i;
6540
6541                         if (plen > sizeof(chunks_store))
6542                                 break;
6543                         if (got_chklist) {
6544                                 /* already processed a Chunks list */
6545                                 goto next_param;
6546                         }
6547                         phdr = sctp_get_next_param(m, offset,
6548                             (struct sctp_paramhdr *)chunks_store,
6549                             min(plen, sizeof(chunks_store)));
6550                         if (phdr == NULL)
6551                                 return (-30);
6552                         chunks = (struct sctp_auth_chunk_list *)phdr;
6553                         num_chunks = plen - sizeof(*chunks);
6554                         if (stcb->asoc.peer_auth_chunks != NULL)
6555                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6556                         else
6557                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6558                         for (i = 0; i < num_chunks; i++) {
6559                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6560                                     stcb->asoc.peer_auth_chunks);
6561                                 /* record asconf/asconf-ack if listed */
6562                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6563                                         saw_asconf = 1;
6564                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6565                                         saw_asconf_ack = 1;
6566
6567                         }
6568                         got_chklist = 1;
6569                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6570                             (ptype == SCTP_STATE_COOKIE) ||
6571                             (ptype == SCTP_UNRECOG_PARAM) ||
6572                             (ptype == SCTP_COOKIE_PRESERVE) ||
6573                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6574                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6575                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6576                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6577                     (ptype == SCTP_SUCCESS_REPORT)) {
6578                          /* don't care */ ;
6579                 } else {
6580                         if ((ptype & 0x8000) == 0x0000) {
6581                                 /*
6582                                  * must stop processing the rest of the
6583                                  * param's. Any report bits were handled
6584                                  * with the call to
6585                                  * sctp_arethere_unrecognized_parameters()
6586                                  * when the INIT or INIT-ACK was first seen.
6587                                  */
6588                                 break;
6589                         }
6590                 }
6591
6592 next_param:
6593                 offset += SCTP_SIZE32(plen);
6594                 if (offset >= limit) {
6595                         break;
6596                 }
6597                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6598                     sizeof(parm_buf));
6599         }
6600         /* Now check to see if we need to purge any addresses */
6601         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6602                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6603                     SCTP_ADDR_NOT_IN_ASSOC) {
6604                         /* This address has been removed from the asoc */
6605                         /* remove and free it */
6606                         stcb->asoc.numnets--;
6607                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6608                         sctp_free_remote_addr(net);
6609                         if (net == stcb->asoc.primary_destination) {
6610                                 stcb->asoc.primary_destination = NULL;
6611                                 sctp_select_primary_destination(stcb);
6612                         }
6613                 }
6614         }
6615         if (ecn_allowed == 0) {
6616                 stcb->asoc.ecn_allowed = 0;
6617         }
6618         /* validate authentication required parameters */
6619         if (got_random && got_hmacs) {
6620                 stcb->asoc.peer_supports_auth = 1;
6621         } else {
6622                 stcb->asoc.peer_supports_auth = 0;
6623         }
6624         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6625                 /* peer does not support auth but sent a chunks list? */
6626                 return (-31);
6627         }
6628         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6629             !stcb->asoc.peer_supports_auth) {
6630                 /* peer supports asconf but not auth? */
6631                 return (-32);
6632         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6633             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6634                 return (-33);
6635         }
6636         /* concatenate the full random key */
6637         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6638         if (chunks != NULL) {
6639                 keylen += sizeof(*chunks) + num_chunks;
6640         }
6641         new_key = sctp_alloc_key(keylen);
6642         if (new_key != NULL) {
6643                 /* copy in the RANDOM */
6644                 if (p_random != NULL) {
6645                         keylen = sizeof(*p_random) + random_len;
6646                         bcopy(p_random, new_key->key, keylen);
6647                 }
6648                 /* append in the AUTH chunks */
6649                 if (chunks != NULL) {
6650                         bcopy(chunks, new_key->key + keylen,
6651                             sizeof(*chunks) + num_chunks);
6652                         keylen += sizeof(*chunks) + num_chunks;
6653                 }
6654                 /* append in the HMACs */
6655                 if (hmacs != NULL) {
6656                         bcopy(hmacs, new_key->key + keylen,
6657                             sizeof(*hmacs) + hmacs_len);
6658                 }
6659         } else {
6660                 /* failed to get memory for the key */
6661                 return (-34);
6662         }
6663         if (stcb->asoc.authinfo.peer_random != NULL)
6664                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6665         stcb->asoc.authinfo.peer_random = new_key;
6666         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6667         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6668
6669         return (0);
6670 }
6671
6672 int
6673 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6674     struct sctp_nets *net)
6675 {
6676         /* make sure the requested primary address exists in the assoc */
6677         if (net == NULL && sa)
6678                 net = sctp_findnet(stcb, sa);
6679
6680         if (net == NULL) {
6681                 /* didn't find the requested primary address! */
6682                 return (-1);
6683         } else {
6684                 /* set the primary address */
6685                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6686                         /* Must be confirmed, so queue to set */
6687                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6688                         return (0);
6689                 }
6690                 stcb->asoc.primary_destination = net;
6691                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6692                         sctp_free_remote_addr(stcb->asoc.alternate);
6693                         stcb->asoc.alternate = NULL;
6694                 }
6695                 net = TAILQ_FIRST(&stcb->asoc.nets);
6696                 if (net != stcb->asoc.primary_destination) {
6697                         /*
6698                          * first one on the list is NOT the primary
6699                          * sctp_cmpaddr() is much more efficient if the
6700                          * primary is the first on the list, make it so.
6701                          */
6702                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6703                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6704                 }
6705                 return (0);
6706         }
6707 }
6708
6709 int
6710 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6711 {
6712         /*
6713          * This function serves two purposes. It will see if a TAG can be
6714          * re-used and return 1 for yes it is ok and 0 for don't use that
6715          * tag. A secondary function it will do is purge out old tags that
6716          * can be removed.
6717          */
6718         struct sctpvtaghead *chain;
6719         struct sctp_tagblock *twait_block;
6720         struct sctpasochead *head;
6721         struct sctp_tcb *stcb;
6722         int i;
6723
6724         SCTP_INP_INFO_RLOCK();
6725         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6726             SCTP_BASE_INFO(hashasocmark))];
6727         if (head == NULL) {
6728                 /* invalid vtag */
6729                 goto skip_vtag_check;
6730         }
6731         LIST_FOREACH(stcb, head, sctp_asocs) {
6732                 /*
6733                  * We choose not to lock anything here. TCB's can't be
6734                  * removed since we have the read lock, so they can't be
6735                  * freed on us, same thing for the INP. I may be wrong with
6736                  * this assumption, but we will go with it for now :-)
6737                  */
6738                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6739                         continue;
6740                 }
6741                 if (stcb->asoc.my_vtag == tag) {
6742                         /* candidate */
6743                         if (stcb->rport != rport) {
6744                                 continue;
6745                         }
6746                         if (stcb->sctp_ep->sctp_lport != lport) {
6747                                 continue;
6748                         }
6749                         /* Its a used tag set */
6750                         SCTP_INP_INFO_RUNLOCK();
6751                         return (0);
6752                 }
6753         }
6754 skip_vtag_check:
6755
6756         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6757         /* Now what about timed wait ? */
6758         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6759                 /*
6760                  * Block(s) are present, lets see if we have this tag in the
6761                  * list
6762                  */
6763                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6764                         if (twait_block->vtag_block[i].v_tag == 0) {
6765                                 /* not used */
6766                                 continue;
6767                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6768                             now->tv_sec) {
6769                                 /* Audit expires this guy */
6770                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6771                                 twait_block->vtag_block[i].v_tag = 0;
6772                                 twait_block->vtag_block[i].lport = 0;
6773                                 twait_block->vtag_block[i].rport = 0;
6774                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6775                                     (twait_block->vtag_block[i].lport == lport) &&
6776                             (twait_block->vtag_block[i].rport == rport)) {
6777                                 /* Bad tag, sorry :< */
6778                                 SCTP_INP_INFO_RUNLOCK();
6779                                 return (0);
6780                         }
6781                 }
6782         }
6783         SCTP_INP_INFO_RUNLOCK();
6784         return (1);
6785 }
6786
6787 static void
6788 sctp_drain_mbufs(struct sctp_tcb *stcb)
6789 {
6790         /*
6791          * We must hunt this association for MBUF's past the cumack (i.e.
6792          * out of order data that we can renege on).
6793          */
6794         struct sctp_association *asoc;
6795         struct sctp_tmit_chunk *chk, *nchk;
6796         uint32_t cumulative_tsn_p1;
6797         struct sctp_queued_to_read *ctl, *nctl;
6798         int cnt, strmat;
6799         uint32_t gap, i;
6800         int fnd = 0;
6801
6802         /* We look for anything larger than the cum-ack + 1 */
6803
6804         asoc = &stcb->asoc;
6805         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6806                 /* none we can reneg on. */
6807                 return;
6808         }
6809         SCTP_STAT_INCR(sctps_protocol_drains_done);
6810         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6811         cnt = 0;
6812         /* First look in the re-assembly queue */
6813         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6814                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6815                         /* Yep it is above cum-ack */
6816                         cnt++;
6817                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6818                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6819                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6820                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6821                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6822                         if (chk->data) {
6823                                 sctp_m_freem(chk->data);
6824                                 chk->data = NULL;
6825                         }
6826                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6827                 }
6828         }
6829         /* Ok that was fun, now we will drain all the inbound streams? */
6830         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6831                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6832                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6833                                 /* Yep it is above cum-ack */
6834                                 cnt++;
6835                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6836                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6837                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6838                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6839                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6840                                 if (ctl->data) {
6841                                         sctp_m_freem(ctl->data);
6842                                         ctl->data = NULL;
6843                                 }
6844                                 sctp_free_remote_addr(ctl->whoFrom);
6845                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6846                                 SCTP_DECR_READQ_COUNT();
6847                         }
6848                 }
6849         }
6850         if (cnt) {
6851                 /* We must back down to see what the new highest is */
6852                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6853                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6854                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6855                                 asoc->highest_tsn_inside_map = i;
6856                                 fnd = 1;
6857                                 break;
6858                         }
6859                 }
6860                 if (!fnd) {
6861                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6862                 }
6863                 /*
6864                  * Question, should we go through the delivery queue? The
6865                  * only reason things are on here is the app not reading OR
6866                  * a p-d-api up. An attacker COULD send enough in to
6867                  * initiate the PD-API and then send a bunch of stuff to
6868                  * other streams... these would wind up on the delivery
6869                  * queue.. and then we would not get to them. But in order
6870                  * to do this I then have to back-track and un-deliver
6871                  * sequence numbers in streams.. el-yucko. I think for now
6872                  * we will NOT look at the delivery queue and leave it to be
6873                  * something to consider later. An alternative would be to
6874                  * abort the P-D-API with a notification and then deliver
6875                  * the data.... Or another method might be to keep track of
6876                  * how many times the situation occurs and if we see a
6877                  * possible attack underway just abort the association.
6878                  */
6879 #ifdef SCTP_DEBUG
6880                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6881 #endif
6882                 /*
6883                  * Now do we need to find a new
6884                  * asoc->highest_tsn_inside_map?
6885                  */
6886                 asoc->last_revoke_count = cnt;
6887                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6888                 /* sa_ignore NO_NULL_CHK */
6889                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6890                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6891         }
6892         /*
6893          * Another issue, in un-setting the TSN's in the mapping array we
6894          * DID NOT adjust the highest_tsn marker.  This will cause one of
6895          * two things to occur. It may cause us to do extra work in checking
6896          * for our mapping array movement. More importantly it may cause us
6897          * to SACK every datagram. This may not be a bad thing though since
6898          * we will recover once we get our cum-ack above and all this stuff
6899          * we dumped recovered.
6900          */
6901 }
6902
6903 void
6904 sctp_drain()
6905 {
6906         /*
6907          * We must walk the PCB lists for ALL associations here. The system
6908          * is LOW on MBUF's and needs help. This is where reneging will
6909          * occur. We really hope this does NOT happen!
6910          */
6911         VNET_ITERATOR_DECL(vnet_iter);
6912         VNET_LIST_RLOCK_NOSLEEP();
6913         VNET_FOREACH(vnet_iter) {
6914                 CURVNET_SET(vnet_iter);
6915                 struct sctp_inpcb *inp;
6916                 struct sctp_tcb *stcb;
6917
6918                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6919                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6920 #ifdef VIMAGE
6921                         continue;
6922 #else
6923                         return;
6924 #endif
6925                 }
6926                 SCTP_INP_INFO_RLOCK();
6927                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6928                         /* For each endpoint */
6929                         SCTP_INP_RLOCK(inp);
6930                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6931                                 /* For each association */
6932                                 SCTP_TCB_LOCK(stcb);
6933                                 sctp_drain_mbufs(stcb);
6934                                 SCTP_TCB_UNLOCK(stcb);
6935                         }
6936                         SCTP_INP_RUNLOCK(inp);
6937                 }
6938                 SCTP_INP_INFO_RUNLOCK();
6939                 CURVNET_RESTORE();
6940         }
6941         VNET_LIST_RUNLOCK_NOSLEEP();
6942 }
6943
6944 /*
6945  * start a new iterator
6946  * iterates through all endpoints and associations based on the pcb_state
6947  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6948  * assocs and "ef" (optional) is executed when the iterator completes.
6949  * "inpf" (optional) is executed for each new endpoint as it is being
6950  * iterated through. inpe (optional) is called when the inp completes
6951  * its way through all the stcbs.
6952  */
6953 int
6954 sctp_initiate_iterator(inp_func inpf,
6955     asoc_func af,
6956     inp_func inpe,
6957     uint32_t pcb_state,
6958     uint32_t pcb_features,
6959     uint32_t asoc_state,
6960     void *argp,
6961     uint32_t argi,
6962     end_func ef,
6963     struct sctp_inpcb *s_inp,
6964     uint8_t chunk_output_off)
6965 {
6966         struct sctp_iterator *it = NULL;
6967
6968         if (af == NULL) {
6969                 return (-1);
6970         }
6971         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6972             SCTP_M_ITER);
6973         if (it == NULL) {
6974                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6975                 return (ENOMEM);
6976         }
6977         memset(it, 0, sizeof(*it));
6978         it->function_assoc = af;
6979         it->function_inp = inpf;
6980         if (inpf)
6981                 it->done_current_ep = 0;
6982         else
6983                 it->done_current_ep = 1;
6984         it->function_atend = ef;
6985         it->pointer = argp;
6986         it->val = argi;
6987         it->pcb_flags = pcb_state;
6988         it->pcb_features = pcb_features;
6989         it->asoc_state = asoc_state;
6990         it->function_inp_end = inpe;
6991         it->no_chunk_output = chunk_output_off;
6992         it->vn = curvnet;
6993         if (s_inp) {
6994                 /* Assume lock is held here */
6995                 it->inp = s_inp;
6996                 SCTP_INP_INCR_REF(it->inp);
6997                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6998         } else {
6999                 SCTP_INP_INFO_RLOCK();
7000                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7001                 if (it->inp) {
7002                         SCTP_INP_INCR_REF(it->inp);
7003                 }
7004                 SCTP_INP_INFO_RUNLOCK();
7005                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7006
7007         }
7008         SCTP_IPI_ITERATOR_WQ_LOCK();
7009
7010         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7011         if (sctp_it_ctl.iterator_running == 0) {
7012                 sctp_wakeup_iterator();
7013         }
7014         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7015         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7016         return (0);
7017 }