sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *   the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #include <netinet/sctp_dtrace_define.h>
  51 #include <netinet/udp.h>
  52 #include <sys/sched.h>
  53 #include <sys/smp.h>
  54 #include <sys/unistd.h>
  55
  56
  57 VNET_DEFINE(struct sctp_base_info, system_base_info);
  58
  59 /* FIX: we don't handle multiple link local scopes */
  60 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  61 #ifdef INET6
  62 int
  63 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  64 {
  65         struct sockaddr_in6 tmp_a, tmp_b;
  66
  67         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  68         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  69                 return 0;
  70         }
  71         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  72         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  73                 return 0;
  74         }
  75         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  76 }
  77
  78 #endif
  79
  80 void
  81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  82 {
  83         /*
  84          * We really don't need to lock this, but I will just because it
  85          * does not hurt.
  86          */
  87         SCTP_INP_INFO_RLOCK();
  88         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  89         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  90         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  91         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  92         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  93         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  94         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  95         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  96
  97         SCTP_INP_INFO_RUNLOCK();
  98 }
  99
 100 /*
 101  * Addresses are added to VRF's (Virtual Router's). For BSD we
 102  * have only the default VRF 0. We maintain a hash list of
 103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 104  * these has a list of addresses. When we add a new address
 105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 106  * not exist we create it and add it to the list of IFN's
 107  * within the VRF. Once we have the sctp_ifn, we add the
 108  * address to the list. So we look something like:
 109  *
 110  * hash-vrf-table
 111  *   vrf-> ifn-> ifn -> ifn
 112  *   vrf    |
 113  *    ...   +--ifa-> ifa -> ifa
 114  *   vrf
 115  *
 116  * We keep these separate lists since the SCTP subsystem will
 117  * point to these from its source address selection nets structure.
 118  * When an address is deleted it does not happen right away on
 119  * the SCTP side, it gets scheduled. What we do when a
 120  * delete happens is immediately remove the address from
 121  * the master list and decrement the refcount. As our
 122  * addip iterator works through and frees the src address
 123  * selection pointing to the sctp_ifa, eventually the refcount
 124  * will reach 0 and we will delete it. Note that it is assumed
 125  * that any locking on system level ifn/ifa is done at the
 126  * caller of these functions and these routines will only
 127  * lock the SCTP structures as they add or delete things.
 128  *
 129  * Other notes on VRF concepts.
 130  *  - An endpoint can be in multiple VRF's
 131  *  - An association lives within a VRF and only one VRF.
 132  *  - Any incoming packet we can deduce the VRF for by
 133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 134  *  - Any downward send call or connect call must supply the
 135  *    VRF via ancillary data or via some sort of set default
 136  *    VRF socket option call (again for BSD no brainer since
 137  *    the VRF is always 0).
 138  *  - An endpoint may add multiple VRF's to it.
 139  *  - Listening sockets can accept associations in any
 140  *    of the VRF's they are in but the assoc will end up
 141  *    in only one VRF (gotten from the packet or connect/send).
 142  *
 143  */
 144
 145 struct sctp_vrf *
 146 sctp_allocate_vrf(int vrf_id)
 147 {
 148         struct sctp_vrf *vrf = NULL;
 149         struct sctp_vrflist *bucket;
 150
 151         /* First allocate the VRF structure */
 152         vrf = sctp_find_vrf(vrf_id);
 153         if (vrf) {
 154                 /* Already allocated */
 155                 return (vrf);
 156         }
 157         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 158             SCTP_M_VRF);
 159         if (vrf == NULL) {
 160                 /* No memory */
 161 #ifdef INVARIANTS
 162                 panic("No memory for VRF:%d", vrf_id);
 163 #endif
 164                 return (NULL);
 165         }
 166         /* setup the VRF */
 167         memset(vrf, 0, sizeof(struct sctp_vrf));
 168         vrf->vrf_id = vrf_id;
 169         LIST_INIT(&vrf->ifnlist);
 170         vrf->total_ifa_count = 0;
 171         vrf->refcount = 0;
 172         /* now also setup table ids */
 173         SCTP_INIT_VRF_TABLEID(vrf);
 174         /* Init the HASH of addresses */
 175         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 176             &vrf->vrf_addr_hashmark);
 177         if (vrf->vrf_addr_hash == NULL) {
 178                 /* No memory */
 179 #ifdef INVARIANTS
 180                 panic("No memory for VRF:%d", vrf_id);
 181 #endif
 182                 SCTP_FREE(vrf, SCTP_M_VRF);
 183                 return (NULL);
 184         }
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192
 193 struct sctp_ifn *
 194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 195 {
 196         struct sctp_ifn *sctp_ifnp;
 197         struct sctp_ifnlist *hash_ifn_head;
 198
 199         /*
 200          * We assume the lock is held for the addresses if that's wrong
 201          * problems could occur :-)
 202          */
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215
 216
 217 struct sctp_vrf *
 218 sctp_find_vrf(uint32_t vrf_id)
 219 {
 220         struct sctp_vrflist *bucket;
 221         struct sctp_vrf *liste;
 222
 223         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 224         LIST_FOREACH(liste, bucket, next_vrf) {
 225                 if (vrf_id == liste->vrf_id) {
 226                         return (liste);
 227                 }
 228         }
 229         return (NULL);
 230 }
 231
 232 void
 233 sctp_free_vrf(struct sctp_vrf *vrf)
 234 {
 235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 236                 if (vrf->vrf_addr_hash) {
 237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 238                         vrf->vrf_addr_hash = NULL;
 239                 }
 240                 /* We zero'd the count */
 241                 LIST_REMOVE(vrf, next_vrf);
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 244         }
 245 }
 246
 247 void
 248 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 249 {
 250         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 251                 /* We zero'd the count */
 252                 if (sctp_ifnp->vrf) {
 253                         sctp_free_vrf(sctp_ifnp->vrf);
 254                 }
 255                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 256                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 257         }
 258 }
 259
 260 void
 261 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 262 {
 263         struct sctp_ifn *sctp_ifnp;
 264
 265         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 266         if (sctp_ifnp != NULL) {
 267                 sctp_ifnp->ifn_mtu = mtu;
 268         }
 269 }
 270
 271
 272 void
 273 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 274 {
 275         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 276                 /* We zero'd the count */
 277                 if (sctp_ifap->ifn_p) {
 278                         sctp_free_ifn(sctp_ifap->ifn_p);
 279                 }
 280                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 281                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 282         }
 283 }
 284
 285 static void
 286 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 287 {
 288         struct sctp_ifn *found;
 289
 290         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 291         if (found == NULL) {
 292                 /* Not in the list.. sorry */
 293                 return;
 294         }
 295         if (hold_addr_lock == 0)
 296                 SCTP_IPI_ADDR_WLOCK();
 297         LIST_REMOVE(sctp_ifnp, next_bucket);
 298         LIST_REMOVE(sctp_ifnp, next_ifn);
 299         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 300             sctp_ifnp->registered_af);
 301         if (hold_addr_lock == 0)
 302                 SCTP_IPI_ADDR_WUNLOCK();
 303         /* Take away the reference, and possibly free it */
 304         sctp_free_ifn(sctp_ifnp);
 305 }
 306
 307 void
 308 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 309     const char *if_name, uint32_t ifn_index)
 310 {
 311         struct sctp_vrf *vrf;
 312         struct sctp_ifa *sctp_ifap = NULL;
 313
 314         SCTP_IPI_ADDR_RLOCK();
 315         vrf = sctp_find_vrf(vrf_id);
 316         if (vrf == NULL) {
 317                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 318                 goto out;
 319
 320         }
 321         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 322         if (sctp_ifap == NULL) {
 323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 324                 goto out;
 325         }
 326         if (sctp_ifap->ifn_p == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 328                 goto out;
 329         }
 330         if (if_name) {
 331                 int len1, len2;
 332
 333                 len1 = strlen(if_name);
 334                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 335                 if (len1 != len2) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 337                             len1, len2);
 338                         goto out;
 339                 }
 340                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 341                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 342                             sctp_ifap->ifn_p->ifn_name,
 343                             if_name);
 344                         goto out;
 345                 }
 346         } else {
 347                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 348                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 349                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 350                         goto out;
 351                 }
 352         }
 353
 354         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 355         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 356 out:
 357         SCTP_IPI_ADDR_RUNLOCK();
 358 }
 359
 360 void
 361 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 362     const char *if_name, uint32_t ifn_index)
 363 {
 364         struct sctp_vrf *vrf;
 365         struct sctp_ifa *sctp_ifap = NULL;
 366
 367         SCTP_IPI_ADDR_RLOCK();
 368         vrf = sctp_find_vrf(vrf_id);
 369         if (vrf == NULL) {
 370                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 371                 goto out;
 372
 373         }
 374         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 375         if (sctp_ifap == NULL) {
 376                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 377                 goto out;
 378         }
 379         if (sctp_ifap->ifn_p == NULL) {
 380                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 381                 goto out;
 382         }
 383         if (if_name) {
 384                 int len1, len2;
 385
 386                 len1 = strlen(if_name);
 387                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 388                 if (len1 != len2) {
 389                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 390                             len1, len2);
 391                         goto out;
 392                 }
 393                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 394                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 395                             sctp_ifap->ifn_p->ifn_name,
 396                             if_name);
 397                         goto out;
 398                 }
 399         } else {
 400                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 401                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 402                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 403                         goto out;
 404                 }
 405         }
 406
 407         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 408         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 409 out:
 410         SCTP_IPI_ADDR_RUNLOCK();
 411 }
 412
 413 /*-
 414  * Add an ifa to an ifn.
 415  * Register the interface as necessary.
 416  * NOTE: ADDR write lock MUST be held.
 417  */
 418 static void
 419 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 420 {
 421         int ifa_af;
 422
 423         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 424         sctp_ifap->ifn_p = sctp_ifnp;
 425         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 426         /* update address counts */
 427         sctp_ifnp->ifa_count++;
 428         ifa_af = sctp_ifap->address.sa.sa_family;
 429         if (ifa_af == AF_INET)
 430                 sctp_ifnp->num_v4++;
 431         else
 432                 sctp_ifnp->num_v6++;
 433         if (sctp_ifnp->ifa_count == 1) {
 434                 /* register the new interface */
 435                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 436                 sctp_ifnp->registered_af = ifa_af;
 437         }
 438 }
 439
 440 /*-
 441  * Remove an ifa from its ifn.
 442  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 443  * the interface based on the remaining address families left.
 444  * NOTE: ADDR write lock MUST be held.
 445  */
 446 static void
 447 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 448 {
 449         uint32_t ifn_index;
 450
 451         LIST_REMOVE(sctp_ifap, next_ifa);
 452         if (sctp_ifap->ifn_p) {
 453                 /* update address counts */
 454                 sctp_ifap->ifn_p->ifa_count--;
 455                 if (sctp_ifap->address.sa.sa_family == AF_INET6)
 456                         sctp_ifap->ifn_p->num_v6--;
 457                 else if (sctp_ifap->address.sa.sa_family == AF_INET)
 458                         sctp_ifap->ifn_p->num_v4--;
 459
 460                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 461                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 462                         /* remove the ifn, possibly freeing it */
 463                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 464                 } else {
 465                         /* re-register address family type, if needed */
 466                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 467                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 468                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 469                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 470                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 471                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 472                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 473                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 474                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 475                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 476                         }
 477                         /* free the ifn refcount */
 478                         sctp_free_ifn(sctp_ifap->ifn_p);
 479                 }
 480                 sctp_ifap->ifn_p = NULL;
 481         }
 482 }
 483
 484 struct sctp_ifa *
 485 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 486     uint32_t ifn_type, const char *if_name, void *ifa,
 487     struct sockaddr *addr, uint32_t ifa_flags,
 488     int dynamic_add)
 489 {
 490         struct sctp_vrf *vrf;
 491         struct sctp_ifn *sctp_ifnp = NULL;
 492         struct sctp_ifa *sctp_ifap = NULL;
 493         struct sctp_ifalist *hash_addr_head;
 494         struct sctp_ifnlist *hash_ifn_head;
 495         uint32_t hash_of_addr;
 496         int new_ifn_af = 0;
 497
 498 #ifdef SCTP_DEBUG
 499         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 500         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 501 #endif
 502         SCTP_IPI_ADDR_WLOCK();
 503         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 504         if (sctp_ifnp) {
 505                 vrf = sctp_ifnp->vrf;
 506         } else {
 507                 vrf = sctp_find_vrf(vrf_id);
 508                 if (vrf == NULL) {
 509                         vrf = sctp_allocate_vrf(vrf_id);
 510                         if (vrf == NULL) {
 511                                 SCTP_IPI_ADDR_WUNLOCK();
 512                                 return (NULL);
 513                         }
 514                 }
 515         }
 516         if (sctp_ifnp == NULL) {
 517                 /*
 518                  * build one and add it, can't hold lock until after malloc
 519                  * done though.
 520                  */
 521                 SCTP_IPI_ADDR_WUNLOCK();
 522                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 523                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 524                 if (sctp_ifnp == NULL) {
 525 #ifdef INVARIANTS
 526                         panic("No memory for IFN");
 527 #endif
 528                         return (NULL);
 529                 }
 530                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 531                 sctp_ifnp->ifn_index = ifn_index;
 532                 sctp_ifnp->ifn_p = ifn;
 533                 sctp_ifnp->ifn_type = ifn_type;
 534                 sctp_ifnp->refcount = 0;
 535                 sctp_ifnp->vrf = vrf;
 536                 atomic_add_int(&vrf->refcount, 1);
 537                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 538                 if (if_name != NULL) {
 539                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 540                 } else {
 541                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 542                 }
 543                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 544                 LIST_INIT(&sctp_ifnp->ifalist);
 545                 SCTP_IPI_ADDR_WLOCK();
 546                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 547                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 548                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 549                 new_ifn_af = 1;
 550         }
 551         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 552         if (sctp_ifap) {
 553                 /* Hmm, it already exists? */
 554                 if ((sctp_ifap->ifn_p) &&
 555                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 556                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 557                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 558                             sctp_ifap);
 559                         if (new_ifn_af) {
 560                                 /* Remove the created one that we don't want */
 561                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 562                         }
 563                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 564                                 /* easy to solve, just switch back to active */
 565                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 566                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 567                                 sctp_ifap->ifn_p = sctp_ifnp;
 568                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 569                         }
 570         exit_stage_left:
 571                         SCTP_IPI_ADDR_WUNLOCK();
 572                         return (sctp_ifap);
 573                 } else {
 574                         if (sctp_ifap->ifn_p) {
 575                                 /*
 576                                  * The last IFN gets the address, remove the
 577                                  * old one
 578                                  */
 579                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 580                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 581                                     sctp_ifap->ifn_p->ifn_index, if_name,
 582                                     ifn_index);
 583                                 /* remove the address from the old ifn */
 584                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 585                                 /* move the address over to the new ifn */
 586                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 587                                 goto exit_stage_left;
 588                         } else {
 589                                 /* repair ifnp which was NULL ? */
 590                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 591                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 592                                     sctp_ifnp, sctp_ifap);
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                         }
 595                         goto exit_stage_left;
 596                 }
 597         }
 598         SCTP_IPI_ADDR_WUNLOCK();
 599         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 600         if (sctp_ifap == NULL) {
 601 #ifdef INVARIANTS
 602                 panic("No memory for IFA");
 603 #endif
 604                 return (NULL);
 605         }
 606         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 607         sctp_ifap->ifn_p = sctp_ifnp;
 608         atomic_add_int(&sctp_ifnp->refcount, 1);
 609         sctp_ifap->vrf_id = vrf_id;
 610         sctp_ifap->ifa = ifa;
 611         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 612         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 613         sctp_ifap->flags = ifa_flags;
 614         /* Set scope */
 615         switch (sctp_ifap->address.sa.sa_family) {
 616         case AF_INET:
 617                 {
 618                         struct sockaddr_in *sin;
 619
 620                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 621                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 622                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 623                                 sctp_ifap->src_is_loop = 1;
 624                         }
 625                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 626                                 sctp_ifap->src_is_priv = 1;
 627                         }
 628                         sctp_ifnp->num_v4++;
 629                         if (new_ifn_af)
 630                                 new_ifn_af = AF_INET;
 631                         break;
 632                 }
 633 #ifdef INET6
 634         case AF_INET6:
 635                 {
 636                         /* ok to use deprecated addresses? */
 637                         struct sockaddr_in6 *sin6;
 638
 639                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 640                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 641                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 642                                 sctp_ifap->src_is_loop = 1;
 643                         }
 644                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 645                                 sctp_ifap->src_is_priv = 1;
 646                         }
 647                         sctp_ifnp->num_v6++;
 648                         if (new_ifn_af)
 649                                 new_ifn_af = AF_INET6;
 650                         break;
 651                 }
 652 #endif
 653         default:
 654                 new_ifn_af = 0;
 655                 break;
 656         }
 657         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 658
 659         if ((sctp_ifap->src_is_priv == 0) &&
 660             (sctp_ifap->src_is_loop == 0)) {
 661                 sctp_ifap->src_is_glob = 1;
 662         }
 663         SCTP_IPI_ADDR_WLOCK();
 664         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 665         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 666         sctp_ifap->refcount = 1;
 667         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 668         sctp_ifnp->ifa_count++;
 669         vrf->total_ifa_count++;
 670         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 671         if (new_ifn_af) {
 672                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 673                 sctp_ifnp->registered_af = new_ifn_af;
 674         }
 675         SCTP_IPI_ADDR_WUNLOCK();
 676         if (dynamic_add) {
 677                 /*
 678                  * Bump up the refcount so that when the timer completes it
 679                  * will drop back down.
 680                  */
 681                 struct sctp_laddr *wi;
 682
 683                 atomic_add_int(&sctp_ifap->refcount, 1);
 684                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 685                 if (wi == NULL) {
 686                         /*
 687                          * Gak, what can we do? We have lost an address
 688                          * change can you say HOSED?
 689                          */
 690                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 691                         /* Opps, must decrement the count */
 692                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 693                             if_name);
 694                         return (NULL);
 695                 }
 696                 SCTP_INCR_LADDR_COUNT();
 697                 bzero(wi, sizeof(*wi));
 698                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 699                 wi->ifa = sctp_ifap;
 700                 wi->action = SCTP_ADD_IP_ADDRESS;
 701
 702                 SCTP_WQ_ADDR_LOCK();
 703                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 704                 SCTP_WQ_ADDR_UNLOCK();
 705
 706                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 707                     (struct sctp_inpcb *)NULL,
 708                     (struct sctp_tcb *)NULL,
 709                     (struct sctp_nets *)NULL);
 710         } else {
 711                 /* it's ready for use */
 712                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 713         }
 714         return (sctp_ifap);
 715 }
 716
 717 void
 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 719     uint32_t ifn_index, const char *if_name)
 720 {
 721         struct sctp_vrf *vrf;
 722         struct sctp_ifa *sctp_ifap = NULL;
 723
 724         SCTP_IPI_ADDR_WLOCK();
 725         vrf = sctp_find_vrf(vrf_id);
 726         if (vrf == NULL) {
 727                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 728                 goto out_now;
 729         }
 730 #ifdef SCTP_DEBUG
 731         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 732         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 733 #endif
 734         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 735         if (sctp_ifap) {
 736                 /* Validate the delete */
 737                 if (sctp_ifap->ifn_p) {
 738                         int valid = 0;
 739
 740                         /*-
 741                          * The name has priority over the ifn_index
 742                          * if its given. We do this especially for
 743                          * panda who might recycle indexes fast.
 744                          */
 745                         if (if_name) {
 746                                 int len1, len2;
 747
 748                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 749                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 750                                 if (len1 && len2 && (len1 == len2)) {
 751                                         /* we can compare them */
 752                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 753                                                 /*
 754                                                  * They match its a correct
 755                                                  * delete
 756                                                  */
 757                                                 valid = 1;
 758                                         }
 759                                 }
 760                         }
 761                         if (!valid) {
 762                                 /* last ditch check ifn_index */
 763                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 764                                         valid = 1;
 765                                 }
 766                         }
 767                         if (!valid) {
 768                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 769                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 770                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 771                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 772                                 SCTP_IPI_ADDR_WUNLOCK();
 773                                 return;
 774                         }
 775                 }
 776                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 777                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 778                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 779                 vrf->total_ifa_count--;
 780                 LIST_REMOVE(sctp_ifap, next_bucket);
 781                 sctp_remove_ifa_from_ifn(sctp_ifap);
 782         }
 783 #ifdef SCTP_DEBUG
 784         else {
 785                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 786                     ifn_index);
 787                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 788         }
 789 #endif
 790
 791 out_now:
 792         SCTP_IPI_ADDR_WUNLOCK();
 793         if (sctp_ifap) {
 794                 struct sctp_laddr *wi;
 795
 796                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 797                 if (wi == NULL) {
 798                         /*
 799                          * Gak, what can we do? We have lost an address
 800                          * change can you say HOSED?
 801                          */
 802                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 803
 804                         /* Oops, must decrement the count */
 805                         sctp_free_ifa(sctp_ifap);
 806                         return;
 807                 }
 808                 SCTP_INCR_LADDR_COUNT();
 809                 bzero(wi, sizeof(*wi));
 810                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 811                 wi->ifa = sctp_ifap;
 812                 wi->action = SCTP_DEL_IP_ADDRESS;
 813                 SCTP_WQ_ADDR_LOCK();
 814                 /*
 815                  * Should this really be a tailq? As it is we will process
 816                  * the newest first :-0
 817                  */
 818                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 819                 SCTP_WQ_ADDR_UNLOCK();
 820
 821                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 822                     (struct sctp_inpcb *)NULL,
 823                     (struct sctp_tcb *)NULL,
 824                     (struct sctp_nets *)NULL);
 825         }
 826         return;
 827 }
 828
 829
 830 static struct sctp_tcb *
 831 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 832     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 833 {
 834         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 835         /*
 836          * If we support the TCP model, then we must now dig through to see
 837          * if we can find our endpoint in the list of tcp ep's.
 838          */
 839         uint16_t lport, rport;
 840         struct sctppcbhead *ephead;
 841         struct sctp_inpcb *inp;
 842         struct sctp_laddr *laddr;
 843         struct sctp_tcb *stcb;
 844         struct sctp_nets *net;
 845
 846         if ((to == NULL) || (from == NULL)) {
 847                 return (NULL);
 848         }
 849         if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
 850                 lport = ((struct sockaddr_in *)to)->sin_port;
 851                 rport = ((struct sockaddr_in *)from)->sin_port;
 852         } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
 853                 lport = ((struct sockaddr_in6 *)to)->sin6_port;
 854                 rport = ((struct sockaddr_in6 *)from)->sin6_port;
 855         } else {
 856                 return NULL;
 857         }
 858         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 859         /*
 860          * Ok now for each of the guys in this bucket we must look and see:
 861          * - Does the remote port match. - Does there single association's
 862          * addresses match this address (to). If so we update p_ep to point
 863          * to this ep and return the tcb from it.
 864          */
 865         LIST_FOREACH(inp, ephead, sctp_hash) {
 866                 SCTP_INP_RLOCK(inp);
 867                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 868                         SCTP_INP_RUNLOCK(inp);
 869                         continue;
 870                 }
 871                 if (lport != inp->sctp_lport) {
 872                         SCTP_INP_RUNLOCK(inp);
 873                         continue;
 874                 }
 875                 if (inp->def_vrf_id != vrf_id) {
 876                         SCTP_INP_RUNLOCK(inp);
 877                         continue;
 878                 }
 879                 /* check to see if the ep has one of the addresses */
 880                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 881                         /* We are NOT bound all, so look further */
 882                         int match = 0;
 883
 884                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 885
 886                                 if (laddr->ifa == NULL) {
 887                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 888                                         continue;
 889                                 }
 890                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 891                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 892                                         continue;
 893                                 }
 894                                 if (laddr->ifa->address.sa.sa_family ==
 895                                     to->sa_family) {
 896                                         /* see if it matches */
 897                                         struct sockaddr_in *intf_addr, *sin;
 898
 899                                         intf_addr = &laddr->ifa->address.sin;
 900                                         sin = (struct sockaddr_in *)to;
 901                                         if (from->sa_family == AF_INET) {
 902                                                 if (sin->sin_addr.s_addr ==
 903                                                     intf_addr->sin_addr.s_addr) {
 904                                                         match = 1;
 905                                                         break;
 906                                                 }
 907                                         }
 908 #ifdef INET6
 909                                         if (from->sa_family == AF_INET6) {
 910                                                 struct sockaddr_in6 *intf_addr6;
 911                                                 struct sockaddr_in6 *sin6;
 912
 913                                                 sin6 = (struct sockaddr_in6 *)
 914                                                     to;
 915                                                 intf_addr6 = &laddr->ifa->address.sin6;
 916
 917                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 918                                                     intf_addr6)) {
 919                                                         match = 1;
 920                                                         break;
 921                                                 }
 922                                         }
 923 #endif
 924                                 }
 925                         }
 926                         if (match == 0) {
 927                                 /* This endpoint does not have this address */
 928                                 SCTP_INP_RUNLOCK(inp);
 929                                 continue;
 930                         }
 931                 }
 932                 /*
 933                  * Ok if we hit here the ep has the address, does it hold
 934                  * the tcb?
 935                  */
 936
 937                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 938                 if (stcb == NULL) {
 939                         SCTP_INP_RUNLOCK(inp);
 940                         continue;
 941                 }
 942                 SCTP_TCB_LOCK(stcb);
 943                 if (stcb->rport != rport) {
 944                         /* remote port does not match. */
 945                         SCTP_TCB_UNLOCK(stcb);
 946                         SCTP_INP_RUNLOCK(inp);
 947                         continue;
 948                 }
 949                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 950                         SCTP_TCB_UNLOCK(stcb);
 951                         SCTP_INP_RUNLOCK(inp);
 952                         continue;
 953                 }
 954                 /* Does this TCB have a matching address? */
 955                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 956
 957                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 958                                 /* not the same family, can't be a match */
 959                                 continue;
 960                         }
 961                         switch (from->sa_family) {
 962                         case AF_INET:
 963                                 {
 964                                         struct sockaddr_in *sin, *rsin;
 965
 966                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
 967                                         rsin = (struct sockaddr_in *)from;
 968                                         if (sin->sin_addr.s_addr ==
 969                                             rsin->sin_addr.s_addr) {
 970                                                 /* found it */
 971                                                 if (netp != NULL) {
 972                                                         *netp = net;
 973                                                 }
 974                                                 /*
 975                                                  * Update the endpoint
 976                                                  * pointer
 977                                                  */
 978                                                 *inp_p = inp;
 979                                                 SCTP_INP_RUNLOCK(inp);
 980                                                 return (stcb);
 981                                         }
 982                                         break;
 983                                 }
 984 #ifdef INET6
 985                         case AF_INET6:
 986                                 {
 987                                         struct sockaddr_in6 *sin6, *rsin6;
 988
 989                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
 990                                         rsin6 = (struct sockaddr_in6 *)from;
 991                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
 992                                             rsin6)) {
 993                                                 /* found it */
 994                                                 if (netp != NULL) {
 995                                                         *netp = net;
 996                                                 }
 997                                                 /*
 998                                                  * Update the endpoint
 999                                                  * pointer
1000                                                  */
1001                                                 *inp_p = inp;
1002                                                 SCTP_INP_RUNLOCK(inp);
1003                                                 return (stcb);
1004                                         }
1005                                         break;
1006                                 }
1007 #endif
1008                         default:
1009                                 /* TSNH */
1010                                 break;
1011                         }
1012                 }
1013                 SCTP_TCB_UNLOCK(stcb);
1014                 SCTP_INP_RUNLOCK(inp);
1015         }
1016         return (NULL);
1017 }
1018
1019 static int
1020 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1021 {
1022         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1023         int ipv4_addr_legal, ipv6_addr_legal;
1024         struct sctp_vrf *vrf;
1025         struct sctp_ifn *sctp_ifn;
1026         struct sctp_ifa *sctp_ifa;
1027
1028         loopback_scope = stcb->asoc.loopback_scope;
1029         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1030         local_scope = stcb->asoc.local_scope;
1031         site_scope = stcb->asoc.site_scope;
1032         ipv4_addr_legal = ipv6_addr_legal = 0;
1033         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1034                 ipv6_addr_legal = 1;
1035                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1036                         ipv4_addr_legal = 1;
1037                 }
1038         } else {
1039                 ipv4_addr_legal = 1;
1040         }
1041
1042         SCTP_IPI_ADDR_RLOCK();
1043         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1044         if (vrf == NULL) {
1045                 /* no vrf, no addresses */
1046                 SCTP_IPI_ADDR_RUNLOCK();
1047                 return (0);
1048         }
1049         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1050                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1051                         if ((loopback_scope == 0) &&
1052                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1053                                 continue;
1054                         }
1055                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1056                                 if (sctp_is_addr_restricted(stcb, sctp_ifa))
1057                                         continue;
1058                                 switch (sctp_ifa->address.sa.sa_family) {
1059 #ifdef INET
1060                                 case AF_INET:
1061                                         if (ipv4_addr_legal) {
1062                                                 struct sockaddr_in *sin,
1063                                                            *rsin;
1064
1065                                                 sin = &sctp_ifa->address.sin;
1066                                                 rsin = (struct sockaddr_in *)to;
1067                                                 if ((ipv4_local_scope == 0) &&
1068                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1069                                                         continue;
1070                                                 }
1071                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1072                                                         SCTP_IPI_ADDR_RUNLOCK();
1073                                                         return (1);
1074                                                 }
1075                                         }
1076                                         break;
1077 #endif
1078 #ifdef INET6
1079                                 case AF_INET6:
1080                                         if (ipv6_addr_legal) {
1081                                                 struct sockaddr_in6 *sin6,
1082                                                             *rsin6;
1083
1084                                                 sin6 = &sctp_ifa->address.sin6;
1085                                                 rsin6 = (struct sockaddr_in6 *)to;
1086                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1087                                                         if (local_scope == 0)
1088                                                                 continue;
1089                                                         if (sin6->sin6_scope_id == 0) {
1090                                                                 if (sa6_recoverscope(sin6) != 0)
1091                                                                         continue;
1092                                                         }
1093                                                 }
1094                                                 if ((site_scope == 0) &&
1095                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1096                                                         continue;
1097                                                 }
1098                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1099                                                         SCTP_IPI_ADDR_RUNLOCK();
1100                                                         return (1);
1101                                                 }
1102                                         }
1103                                         break;
1104 #endif
1105                                 default:
1106                                         /* TSNH */
1107                                         break;
1108                                 }
1109                         }
1110                 }
1111         } else {
1112                 struct sctp_laddr *laddr;
1113
1114                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1115                         if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
1116                                 continue;
1117                         }
1118                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1119                                 continue;
1120                         }
1121                         switch (to->sa_family) {
1122 #ifdef INET
1123                         case AF_INET:
1124                                 {
1125                                         struct sockaddr_in *sin, *rsin;
1126
1127                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1128                                         rsin = (struct sockaddr_in *)to;
1129                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1130                                                 SCTP_IPI_ADDR_RUNLOCK();
1131                                                 return (1);
1132                                         }
1133                                         break;
1134                                 }
1135 #endif
1136 #ifdef INET6
1137                         case AF_INET6:
1138                                 {
1139                                         struct sockaddr_in6 *sin6, *rsin6;
1140
1141                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1142                                         rsin6 = (struct sockaddr_in6 *)to;
1143                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1144                                                 SCTP_IPI_ADDR_RUNLOCK();
1145                                                 return (1);
1146                                         }
1147                                         break;
1148                                 }
1149
1150 #endif
1151                         default:
1152                                 /* TSNH */
1153                                 break;
1154                         }
1155
1156                 }
1157         }
1158         SCTP_IPI_ADDR_RUNLOCK();
1159         return (0);
1160 }
1161
1162 /*
1163  * rules for use
1164  *
1165  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1166  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1167  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1168  * NULL.
1169  */
1170
1171 struct sctp_tcb *
1172 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1173     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1174 {
1175         struct sctpasochead *head;
1176         struct sctp_inpcb *inp;
1177         struct sctp_tcb *stcb = NULL;
1178         struct sctp_nets *net;
1179         uint16_t rport;
1180
1181         inp = *inp_p;
1182         if (remote->sa_family == AF_INET) {
1183                 rport = (((struct sockaddr_in *)remote)->sin_port);
1184         } else if (remote->sa_family == AF_INET6) {
1185                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1186         } else {
1187                 return (NULL);
1188         }
1189         if (locked_tcb) {
1190                 /*
1191                  * UN-lock so we can do proper locking here this occurs when
1192                  * called from load_addresses_from_init.
1193                  */
1194                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1195                 SCTP_TCB_UNLOCK(locked_tcb);
1196         }
1197         SCTP_INP_INFO_RLOCK();
1198         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1199                 /*-
1200                  * Now either this guy is our listener or it's the
1201                  * connector. If it is the one that issued the connect, then
1202                  * it's only chance is to be the first TCB in the list. If
1203                  * it is the acceptor, then do the special_lookup to hash
1204                  * and find the real inp.
1205                  */
1206                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1207                         /* to is peer addr, from is my addr */
1208                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1209                             netp, inp->def_vrf_id);
1210                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1211                                 /* we have a locked tcb, lower refcount */
1212                                 SCTP_INP_DECR_REF(inp);
1213                         }
1214                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1215                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1216                                 SCTP_TCB_LOCK(locked_tcb);
1217                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1218                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1219                         }
1220                         SCTP_INP_INFO_RUNLOCK();
1221                         return (stcb);
1222                 } else {
1223                         SCTP_INP_WLOCK(inp);
1224                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1225                                 goto null_return;
1226                         }
1227                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1228                         if (stcb == NULL) {
1229                                 goto null_return;
1230                         }
1231                         SCTP_TCB_LOCK(stcb);
1232
1233                         if (stcb->rport != rport) {
1234                                 /* remote port does not match. */
1235                                 SCTP_TCB_UNLOCK(stcb);
1236                                 goto null_return;
1237                         }
1238                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1239                                 SCTP_TCB_UNLOCK(stcb);
1240                                 goto null_return;
1241                         }
1242                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1243                                 SCTP_TCB_UNLOCK(stcb);
1244                                 goto null_return;
1245                         }
1246                         /* now look at the list of remote addresses */
1247                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1248 #ifdef INVARIANTS
1249                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1250                                         panic("Corrupt net list");
1251                                 }
1252 #endif
1253                                 if (net->ro._l_addr.sa.sa_family !=
1254                                     remote->sa_family) {
1255                                         /* not the same family */
1256                                         continue;
1257                                 }
1258                                 switch (remote->sa_family) {
1259                                 case AF_INET:
1260                                         {
1261                                                 struct sockaddr_in *sin,
1262                                                            *rsin;
1263
1264                                                 sin = (struct sockaddr_in *)
1265                                                     &net->ro._l_addr;
1266                                                 rsin = (struct sockaddr_in *)remote;
1267                                                 if (sin->sin_addr.s_addr ==
1268                                                     rsin->sin_addr.s_addr) {
1269                                                         /* found it */
1270                                                         if (netp != NULL) {
1271                                                                 *netp = net;
1272                                                         }
1273                                                         if (locked_tcb == NULL) {
1274                                                                 SCTP_INP_DECR_REF(inp);
1275                                                         } else if (locked_tcb != stcb) {
1276                                                                 SCTP_TCB_LOCK(locked_tcb);
1277                                                         }
1278                                                         if (locked_tcb) {
1279                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1280                                                         }
1281                                                         SCTP_INP_WUNLOCK(inp);
1282                                                         SCTP_INP_INFO_RUNLOCK();
1283                                                         return (stcb);
1284                                                 }
1285                                                 break;
1286                                         }
1287 #ifdef INET6
1288                                 case AF_INET6:
1289                                         {
1290                                                 struct sockaddr_in6 *sin6,
1291                                                             *rsin6;
1292
1293                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1294                                                 rsin6 = (struct sockaddr_in6 *)remote;
1295                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1296                                                     rsin6)) {
1297                                                         /* found it */
1298                                                         if (netp != NULL) {
1299                                                                 *netp = net;
1300                                                         }
1301                                                         if (locked_tcb == NULL) {
1302                                                                 SCTP_INP_DECR_REF(inp);
1303                                                         } else if (locked_tcb != stcb) {
1304                                                                 SCTP_TCB_LOCK(locked_tcb);
1305                                                         }
1306                                                         if (locked_tcb) {
1307                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1308                                                         }
1309                                                         SCTP_INP_WUNLOCK(inp);
1310                                                         SCTP_INP_INFO_RUNLOCK();
1311                                                         return (stcb);
1312                                                 }
1313                                                 break;
1314                                         }
1315 #endif
1316                                 default:
1317                                         /* TSNH */
1318                                         break;
1319                                 }
1320                         }
1321                         SCTP_TCB_UNLOCK(stcb);
1322                 }
1323         } else {
1324                 SCTP_INP_WLOCK(inp);
1325                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1326                         goto null_return;
1327                 }
1328                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1329                     inp->sctp_hashmark)];
1330                 if (head == NULL) {
1331                         goto null_return;
1332                 }
1333                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1334                         if (stcb->rport != rport) {
1335                                 /* remote port does not match */
1336                                 continue;
1337                         }
1338                         SCTP_TCB_LOCK(stcb);
1339                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1340                                 SCTP_TCB_UNLOCK(stcb);
1341                                 continue;
1342                         }
1343                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1344                                 SCTP_TCB_UNLOCK(stcb);
1345                                 continue;
1346                         }
1347                         /* now look at the list of remote addresses */
1348                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1349 #ifdef INVARIANTS
1350                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1351                                         panic("Corrupt net list");
1352                                 }
1353 #endif
1354                                 if (net->ro._l_addr.sa.sa_family !=
1355                                     remote->sa_family) {
1356                                         /* not the same family */
1357                                         continue;
1358                                 }
1359                                 switch (remote->sa_family) {
1360                                 case AF_INET:
1361                                         {
1362                                                 struct sockaddr_in *sin,
1363                                                            *rsin;
1364
1365                                                 sin = (struct sockaddr_in *)
1366                                                     &net->ro._l_addr;
1367                                                 rsin = (struct sockaddr_in *)remote;
1368                                                 if (sin->sin_addr.s_addr ==
1369                                                     rsin->sin_addr.s_addr) {
1370                                                         /* found it */
1371                                                         if (netp != NULL) {
1372                                                                 *netp = net;
1373                                                         }
1374                                                         if (locked_tcb == NULL) {
1375                                                                 SCTP_INP_DECR_REF(inp);
1376                                                         } else if (locked_tcb != stcb) {
1377                                                                 SCTP_TCB_LOCK(locked_tcb);
1378                                                         }
1379                                                         if (locked_tcb) {
1380                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1381                                                         }
1382                                                         SCTP_INP_WUNLOCK(inp);
1383                                                         SCTP_INP_INFO_RUNLOCK();
1384                                                         return (stcb);
1385                                                 }
1386                                                 break;
1387                                         }
1388 #ifdef INET6
1389                                 case AF_INET6:
1390                                         {
1391                                                 struct sockaddr_in6 *sin6,
1392                                                             *rsin6;
1393
1394                                                 sin6 = (struct sockaddr_in6 *)
1395                                                     &net->ro._l_addr;
1396                                                 rsin6 = (struct sockaddr_in6 *)remote;
1397                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1398                                                     rsin6)) {
1399                                                         /* found it */
1400                                                         if (netp != NULL) {
1401                                                                 *netp = net;
1402                                                         }
1403                                                         if (locked_tcb == NULL) {
1404                                                                 SCTP_INP_DECR_REF(inp);
1405                                                         } else if (locked_tcb != stcb) {
1406                                                                 SCTP_TCB_LOCK(locked_tcb);
1407                                                         }
1408                                                         if (locked_tcb) {
1409                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1410                                                         }
1411                                                         SCTP_INP_WUNLOCK(inp);
1412                                                         SCTP_INP_INFO_RUNLOCK();
1413                                                         return (stcb);
1414                                                 }
1415                                                 break;
1416                                         }
1417 #endif
1418                                 default:
1419                                         /* TSNH */
1420                                         break;
1421                                 }
1422                         }
1423                         SCTP_TCB_UNLOCK(stcb);
1424                 }
1425         }
1426 null_return:
1427         /* clean up for returning null */
1428         if (locked_tcb) {
1429                 SCTP_TCB_LOCK(locked_tcb);
1430                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1431         }
1432         SCTP_INP_WUNLOCK(inp);
1433         SCTP_INP_INFO_RUNLOCK();
1434         /* not found */
1435         return (NULL);
1436 }
1437
1438 /*
1439  * Find an association for a specific endpoint using the association id given
1440  * out in the COMM_UP notification
1441  */
1442
1443 struct sctp_tcb *
1444 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1445 {
1446         /*
1447          * Use my the assoc_id to find a endpoint
1448          */
1449         struct sctpasochead *head;
1450         struct sctp_tcb *stcb;
1451         uint32_t id;
1452
1453         if (inp == NULL) {
1454                 SCTP_PRINTF("TSNH ep_associd\n");
1455                 return (NULL);
1456         }
1457         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1458                 SCTP_PRINTF("TSNH ep_associd0\n");
1459                 return (NULL);
1460         }
1461         id = (uint32_t) asoc_id;
1462         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1463         if (head == NULL) {
1464                 /* invalid id TSNH */
1465                 SCTP_PRINTF("TSNH ep_associd1\n");
1466                 return (NULL);
1467         }
1468         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1469                 if (stcb->asoc.assoc_id == id) {
1470                         if (inp != stcb->sctp_ep) {
1471                                 /*
1472                                  * some other guy has the same id active (id
1473                                  * collision ??).
1474                                  */
1475                                 SCTP_PRINTF("TSNH ep_associd2\n");
1476                                 continue;
1477                         }
1478                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1479                                 continue;
1480                         }
1481                         if (want_lock) {
1482                                 SCTP_TCB_LOCK(stcb);
1483                         }
1484                         return (stcb);
1485                 }
1486         }
1487         return (NULL);
1488 }
1489
1490
1491 struct sctp_tcb *
1492 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1493 {
1494         struct sctp_tcb *stcb;
1495
1496         SCTP_INP_RLOCK(inp);
1497         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1498         SCTP_INP_RUNLOCK(inp);
1499         return (stcb);
1500 }
1501
1502
1503 static struct sctp_inpcb *
1504 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1505     uint16_t lport, uint32_t vrf_id)
1506 {
1507         struct sctp_inpcb *inp;
1508         struct sockaddr_in *sin;
1509
1510 #ifdef INET6
1511         struct sockaddr_in6 *sin6;
1512
1513 #endif
1514         struct sctp_laddr *laddr;
1515
1516 #ifdef INET6
1517         struct sockaddr_in6 *intf_addr6;
1518
1519 #endif
1520
1521         int fnd;
1522
1523         /*
1524          * Endpoint probe expects that the INP_INFO is locked.
1525          */
1526         sin = NULL;
1527 #ifdef INET6
1528         sin6 = NULL;
1529 #endif
1530         switch (nam->sa_family) {
1531         case AF_INET:
1532                 sin = (struct sockaddr_in *)nam;
1533                 break;
1534 #ifdef INET6
1535         case AF_INET6:
1536                 sin6 = (struct sockaddr_in6 *)nam;
1537                 break;
1538 #endif
1539         default:
1540                 /* unsupported family */
1541                 return (NULL);
1542         }
1543
1544         if (head == NULL)
1545                 return (NULL);
1546
1547         LIST_FOREACH(inp, head, sctp_hash) {
1548                 SCTP_INP_RLOCK(inp);
1549                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1550                         SCTP_INP_RUNLOCK(inp);
1551                         continue;
1552                 }
1553                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1554                     (inp->sctp_lport == lport)) {
1555                         /* got it */
1556                         if ((nam->sa_family == AF_INET) &&
1557                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1558                             SCTP_IPV6_V6ONLY(inp)) {
1559                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1560                                 SCTP_INP_RUNLOCK(inp);
1561                                 continue;
1562                         }
1563                         /* A V6 address and the endpoint is NOT bound V6 */
1564                         if (nam->sa_family == AF_INET6 &&
1565                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1566                                 SCTP_INP_RUNLOCK(inp);
1567                                 continue;
1568                         }
1569                         /* does a VRF id match? */
1570                         fnd = 0;
1571                         if (inp->def_vrf_id == vrf_id)
1572                                 fnd = 1;
1573
1574                         SCTP_INP_RUNLOCK(inp);
1575                         if (!fnd)
1576                                 continue;
1577                         return (inp);
1578                 }
1579                 SCTP_INP_RUNLOCK(inp);
1580         }
1581         if ((nam->sa_family == AF_INET) &&
1582             (sin->sin_addr.s_addr == INADDR_ANY)) {
1583                 /* Can't hunt for one that has no address specified */
1584                 return (NULL);
1585         }
1586 #ifdef INET6
1587         if ((nam->sa_family == AF_INET6) &&
1588             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
1589                 /* Can't hunt for one that has no address specified */
1590                 return (NULL);
1591         }
1592 #endif
1593         /*
1594          * ok, not bound to all so see if we can find a EP bound to this
1595          * address.
1596          */
1597         LIST_FOREACH(inp, head, sctp_hash) {
1598                 SCTP_INP_RLOCK(inp);
1599                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1600                         SCTP_INP_RUNLOCK(inp);
1601                         continue;
1602                 }
1603                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1604                         SCTP_INP_RUNLOCK(inp);
1605                         continue;
1606                 }
1607                 /*
1608                  * Ok this could be a likely candidate, look at all of its
1609                  * addresses
1610                  */
1611                 if (inp->sctp_lport != lport) {
1612                         SCTP_INP_RUNLOCK(inp);
1613                         continue;
1614                 }
1615                 /* does a VRF id match? */
1616                 fnd = 0;
1617                 if (inp->def_vrf_id == vrf_id)
1618                         fnd = 1;
1619
1620                 if (!fnd) {
1621                         SCTP_INP_RUNLOCK(inp);
1622                         continue;
1623                 }
1624                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1625                         if (laddr->ifa == NULL) {
1626                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1627                                     __FUNCTION__);
1628                                 continue;
1629                         }
1630                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1631                             laddr->ifa);
1632                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1633                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1634                                 continue;
1635                         }
1636                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1637                                 /* possible, see if it matches */
1638                                 struct sockaddr_in *intf_addr;
1639
1640                                 intf_addr = &laddr->ifa->address.sin;
1641                                 switch (nam->sa_family) {
1642                                 case AF_INET:
1643                                         if (sin->sin_addr.s_addr ==
1644                                             intf_addr->sin_addr.s_addr) {
1645                                                 SCTP_INP_RUNLOCK(inp);
1646                                                 return (inp);
1647                                         }
1648                                         break;
1649 #ifdef INET6
1650                                 case AF_INET6:
1651                                         intf_addr6 = &laddr->ifa->address.sin6;
1652                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1653                                             intf_addr6)) {
1654                                                 SCTP_INP_RUNLOCK(inp);
1655                                                 return (inp);
1656                                         }
1657                                         break;
1658 #endif
1659                                 }
1660                         }
1661                 }
1662                 SCTP_INP_RUNLOCK(inp);
1663         }
1664         return (NULL);
1665 }
1666
1667
1668 static struct sctp_inpcb *
1669 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1670 {
1671         struct sctppcbhead *head;
1672         struct sctp_inpcb *t_inp;
1673         int fnd;
1674
1675         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1676             SCTP_BASE_INFO(hashmark))];
1677         LIST_FOREACH(t_inp, head, sctp_hash) {
1678                 if (t_inp->sctp_lport != lport) {
1679                         continue;
1680                 }
1681                 /* is it in the VRF in question */
1682                 fnd = 0;
1683                 if (t_inp->def_vrf_id == vrf_id)
1684                         fnd = 1;
1685                 if (!fnd)
1686                         continue;
1687
1688                 /* This one is in use. */
1689                 /* check the v6/v4 binding issue */
1690                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1691                     SCTP_IPV6_V6ONLY(t_inp)) {
1692                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1693                                 /* collision in V6 space */
1694                                 return (t_inp);
1695                         } else {
1696                                 /* inp is BOUND_V4 no conflict */
1697                                 continue;
1698                         }
1699                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1700                         /* t_inp is bound v4 and v6, conflict always */
1701                         return (t_inp);
1702                 } else {
1703                         /* t_inp is bound only V4 */
1704                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1705                             SCTP_IPV6_V6ONLY(inp)) {
1706                                 /* no conflict */
1707                                 continue;
1708                         }
1709                         /* else fall through to conflict */
1710                 }
1711                 return (t_inp);
1712         }
1713         return (NULL);
1714 }
1715
1716
1717 int
1718 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1719 {
1720         /* For 1-2-1 with port reuse */
1721         struct sctppcbhead *head;
1722         struct sctp_inpcb *tinp;
1723
1724         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1725                 /* only works with port reuse on */
1726                 return (-1);
1727         }
1728         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1729                 return (0);
1730         }
1731         SCTP_INP_RUNLOCK(inp);
1732         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1733             SCTP_BASE_INFO(hashmark))];
1734         /* Kick out all non-listeners to the TCP hash */
1735         LIST_FOREACH(tinp, head, sctp_hash) {
1736                 if (tinp->sctp_lport != inp->sctp_lport) {
1737                         continue;
1738                 }
1739                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1740                         continue;
1741                 }
1742                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1743                         continue;
1744                 }
1745                 if (tinp->sctp_socket->so_qlimit) {
1746                         continue;
1747                 }
1748                 SCTP_INP_WLOCK(tinp);
1749                 LIST_REMOVE(tinp, sctp_hash);
1750                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1751                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1752                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1753                 SCTP_INP_WUNLOCK(tinp);
1754         }
1755         SCTP_INP_WLOCK(inp);
1756         /* Pull from where he was */
1757         LIST_REMOVE(inp, sctp_hash);
1758         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1759         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1760         LIST_INSERT_HEAD(head, inp, sctp_hash);
1761         SCTP_INP_WUNLOCK(inp);
1762         SCTP_INP_RLOCK(inp);
1763         return (0);
1764 }
1765
1766
1767 struct sctp_inpcb *
1768 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1769     uint32_t vrf_id)
1770 {
1771         /*
1772          * First we check the hash table to see if someone has this port
1773          * bound with just the port.
1774          */
1775         struct sctp_inpcb *inp;
1776         struct sctppcbhead *head;
1777         struct sockaddr_in *sin;
1778         struct sockaddr_in6 *sin6;
1779         int lport;
1780         unsigned int i;
1781
1782         if (nam->sa_family == AF_INET) {
1783                 sin = (struct sockaddr_in *)nam;
1784                 lport = ((struct sockaddr_in *)nam)->sin_port;
1785         } else if (nam->sa_family == AF_INET6) {
1786                 sin6 = (struct sockaddr_in6 *)nam;
1787                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1788         } else {
1789                 /* unsupported family */
1790                 return (NULL);
1791         }
1792         /*
1793          * I could cheat here and just cast to one of the types but we will
1794          * do it right. It also provides the check against an Unsupported
1795          * type too.
1796          */
1797         /* Find the head of the ALLADDR chain */
1798         if (have_lock == 0) {
1799                 SCTP_INP_INFO_RLOCK();
1800         }
1801         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1802             SCTP_BASE_INFO(hashmark))];
1803         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1804
1805         /*
1806          * If the TCP model exists it could be that the main listening
1807          * endpoint is gone but there still exists a connected socket for
1808          * this guy. If so we can return the first one that we find. This
1809          * may NOT be the correct one so the caller should be wary on the
1810          * returned INP. Currently the only caller that sets find_tcp_pool
1811          * is in bindx where we are verifying that a user CAN bind the
1812          * address. He either has bound it already, or someone else has, or
1813          * its open to bind, so this is good enough.
1814          */
1815         if (inp == NULL && find_tcp_pool) {
1816                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1817                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1818                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1819                         if (inp) {
1820                                 break;
1821                         }
1822                 }
1823         }
1824         if (inp) {
1825                 SCTP_INP_INCR_REF(inp);
1826         }
1827         if (have_lock == 0) {
1828                 SCTP_INP_INFO_RUNLOCK();
1829         }
1830         return (inp);
1831 }
1832
1833 /*
1834  * Find an association for an endpoint with the pointer to whom you want to
1835  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1836  * need to change the *to to some other struct like a mbuf...
1837  */
1838 struct sctp_tcb *
1839 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1840     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1841     uint32_t vrf_id)
1842 {
1843         struct sctp_inpcb *inp = NULL;
1844         struct sctp_tcb *retval;
1845
1846         SCTP_INP_INFO_RLOCK();
1847         if (find_tcp_pool) {
1848                 if (inp_p != NULL) {
1849                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1850                             vrf_id);
1851                 } else {
1852                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1853                             vrf_id);
1854                 }
1855                 if (retval != NULL) {
1856                         SCTP_INP_INFO_RUNLOCK();
1857                         return (retval);
1858                 }
1859         }
1860         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1861         if (inp_p != NULL) {
1862                 *inp_p = inp;
1863         }
1864         SCTP_INP_INFO_RUNLOCK();
1865
1866         if (inp == NULL) {
1867                 return (NULL);
1868         }
1869         /*
1870          * ok, we have an endpoint, now lets find the assoc for it (if any)
1871          * we now place the source address or from in the to of the find
1872          * endpoint call. Since in reality this chain is used from the
1873          * inbound packet side.
1874          */
1875         if (inp_p != NULL) {
1876                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1877                     NULL);
1878         } else {
1879                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1880                     NULL);
1881         }
1882         return retval;
1883 }
1884
1885
1886 /*
1887  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1888  * find all addresses that the sender has specified in any address list. Each
1889  * address will be used to lookup the TCB and see if one exits.
1890  */
1891 static struct sctp_tcb *
1892 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1893     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1894     struct sockaddr *dest)
1895 {
1896         struct sockaddr_in sin4;
1897         struct sockaddr_in6 sin6;
1898         struct sctp_paramhdr *phdr, parm_buf;
1899         struct sctp_tcb *retval;
1900         uint32_t ptype, plen;
1901
1902         memset(&sin4, 0, sizeof(sin4));
1903         memset(&sin6, 0, sizeof(sin6));
1904         sin4.sin_len = sizeof(sin4);
1905         sin4.sin_family = AF_INET;
1906         sin4.sin_port = sh->src_port;
1907         sin6.sin6_len = sizeof(sin6);
1908         sin6.sin6_family = AF_INET6;
1909         sin6.sin6_port = sh->src_port;
1910
1911         retval = NULL;
1912         offset += sizeof(struct sctp_init_chunk);
1913
1914         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1915         while (phdr != NULL) {
1916                 /* now we must see if we want the parameter */
1917                 ptype = ntohs(phdr->param_type);
1918                 plen = ntohs(phdr->param_length);
1919                 if (plen == 0) {
1920                         break;
1921                 }
1922                 if (ptype == SCTP_IPV4_ADDRESS &&
1923                     plen == sizeof(struct sctp_ipv4addr_param)) {
1924                         /* Get the rest of the address */
1925                         struct sctp_ipv4addr_param ip4_parm, *p4;
1926
1927                         phdr = sctp_get_next_param(m, offset,
1928                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
1929                         if (phdr == NULL) {
1930                                 return (NULL);
1931                         }
1932                         p4 = (struct sctp_ipv4addr_param *)phdr;
1933                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
1934                         /* look it up */
1935                         retval = sctp_findassociation_ep_addr(inp_p,
1936                             (struct sockaddr *)&sin4, netp, dest, NULL);
1937                         if (retval != NULL) {
1938                                 return (retval);
1939                         }
1940                 } else if (ptype == SCTP_IPV6_ADDRESS &&
1941                     plen == sizeof(struct sctp_ipv6addr_param)) {
1942                         /* Get the rest of the address */
1943                         struct sctp_ipv6addr_param ip6_parm, *p6;
1944
1945                         phdr = sctp_get_next_param(m, offset,
1946                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
1947                         if (phdr == NULL) {
1948                                 return (NULL);
1949                         }
1950                         p6 = (struct sctp_ipv6addr_param *)phdr;
1951                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
1952                         /* look it up */
1953                         retval = sctp_findassociation_ep_addr(inp_p,
1954                             (struct sockaddr *)&sin6, netp, dest, NULL);
1955                         if (retval != NULL) {
1956                                 return (retval);
1957                         }
1958                 }
1959                 offset += SCTP_SIZE32(plen);
1960                 phdr = sctp_get_next_param(m, offset, &parm_buf,
1961                     sizeof(parm_buf));
1962         }
1963         return (NULL);
1964 }
1965
1966 static struct sctp_tcb *
1967 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
1968     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
1969     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
1970 {
1971         /*
1972          * Use my vtag to hash. If we find it we then verify the source addr
1973          * is in the assoc. If all goes well we save a bit on rec of a
1974          * packet.
1975          */
1976         struct sctpasochead *head;
1977         struct sctp_nets *net;
1978         struct sctp_tcb *stcb;
1979
1980         *netp = NULL;
1981         *inp_p = NULL;
1982         SCTP_INP_INFO_RLOCK();
1983         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
1984             SCTP_BASE_INFO(hashasocmark))];
1985         if (head == NULL) {
1986                 /* invalid vtag */
1987                 SCTP_INP_INFO_RUNLOCK();
1988                 return (NULL);
1989         }
1990         LIST_FOREACH(stcb, head, sctp_asocs) {
1991                 SCTP_INP_RLOCK(stcb->sctp_ep);
1992                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1993                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
1994                         continue;
1995                 }
1996                 SCTP_TCB_LOCK(stcb);
1997                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
1998                 if (stcb->asoc.my_vtag == vtag) {
1999                         /* candidate */
2000                         if (stcb->rport != rport) {
2001                                 SCTP_TCB_UNLOCK(stcb);
2002                                 continue;
2003                         }
2004                         if (stcb->sctp_ep->sctp_lport != lport) {
2005                                 SCTP_TCB_UNLOCK(stcb);
2006                                 continue;
2007                         }
2008                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2009                                 SCTP_TCB_UNLOCK(stcb);
2010                                 continue;
2011                         }
2012                         /* RRS:Need toaddr check here */
2013                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2014                                 /* Endpoint does not own this address */
2015                                 SCTP_TCB_UNLOCK(stcb);
2016                                 continue;
2017                         }
2018                         if (remote_tag) {
2019                                 /*
2020                                  * If we have both vtags that's all we match
2021                                  * on
2022                                  */
2023                                 if (stcb->asoc.peer_vtag == remote_tag) {
2024                                         /*
2025                                          * If both tags match we consider it
2026                                          * conclusive and check NO
2027                                          * source/destination addresses
2028                                          */
2029                                         goto conclusive;
2030                                 }
2031                         }
2032                         if (skip_src_check) {
2033                 conclusive:
2034                                 if (from) {
2035                                         net = sctp_findnet(stcb, from);
2036                                 } else {
2037                                         *netp = NULL;   /* unknown */
2038                                 }
2039                                 if (inp_p)
2040                                         *inp_p = stcb->sctp_ep;
2041                                 SCTP_INP_INFO_RUNLOCK();
2042                                 return (stcb);
2043                         }
2044                         net = sctp_findnet(stcb, from);
2045                         if (net) {
2046                                 /* yep its him. */
2047                                 *netp = net;
2048                                 SCTP_STAT_INCR(sctps_vtagexpress);
2049                                 *inp_p = stcb->sctp_ep;
2050                                 SCTP_INP_INFO_RUNLOCK();
2051                                 return (stcb);
2052                         } else {
2053                                 /*
2054                                  * not him, this should only happen in rare
2055                                  * cases so I peg it.
2056                                  */
2057                                 SCTP_STAT_INCR(sctps_vtagbogus);
2058                         }
2059                 }
2060                 SCTP_TCB_UNLOCK(stcb);
2061         }
2062         SCTP_INP_INFO_RUNLOCK();
2063         return (NULL);
2064 }
2065
2066 /*
2067  * Find an association with the pointer to the inbound IP packet. This can be
2068  * a IPv4 or IPv6 packet.
2069  */
2070 struct sctp_tcb *
2071 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2072     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2073     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2074 {
2075         int find_tcp_pool;
2076         struct ip *iph;
2077         struct sctp_tcb *retval;
2078         struct sockaddr_storage to_store, from_store;
2079         struct sockaddr *to = (struct sockaddr *)&to_store;
2080         struct sockaddr *from = (struct sockaddr *)&from_store;
2081         struct sctp_inpcb *inp;
2082
2083         iph = mtod(m, struct ip *);
2084         switch (iph->ip_v) {
2085         case IPVERSION:
2086                 {
2087                         /* its IPv4 */
2088                         struct sockaddr_in *from4;
2089
2090                         from4 = (struct sockaddr_in *)&from_store;
2091                         bzero(from4, sizeof(*from4));
2092                         from4->sin_family = AF_INET;
2093                         from4->sin_len = sizeof(struct sockaddr_in);
2094                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2095                         from4->sin_port = sh->src_port;
2096                         break;
2097                 }
2098 #ifdef INET6
2099         case IPV6_VERSION >> 4:
2100                 {
2101                         /* its IPv6 */
2102                         struct ip6_hdr *ip6;
2103                         struct sockaddr_in6 *from6;
2104
2105                         ip6 = mtod(m, struct ip6_hdr *);
2106                         from6 = (struct sockaddr_in6 *)&from_store;
2107                         bzero(from6, sizeof(*from6));
2108                         from6->sin6_family = AF_INET6;
2109                         from6->sin6_len = sizeof(struct sockaddr_in6);
2110                         from6->sin6_addr = ip6->ip6_src;
2111                         from6->sin6_port = sh->src_port;
2112                         /* Get the scopes in properly to the sin6 addr's */
2113                         /* we probably don't need these operations */
2114                         (void)sa6_recoverscope(from6);
2115                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2116                         break;
2117                 }
2118 #endif
2119         default:
2120                 /* Currently not supported. */
2121                 return (NULL);
2122         }
2123
2124
2125         switch (iph->ip_v) {
2126         case IPVERSION:
2127                 {
2128                         /* its IPv4 */
2129                         struct sockaddr_in *to4;
2130
2131                         to4 = (struct sockaddr_in *)&to_store;
2132                         bzero(to4, sizeof(*to4));
2133                         to4->sin_family = AF_INET;
2134                         to4->sin_len = sizeof(struct sockaddr_in);
2135                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2136                         to4->sin_port = sh->dest_port;
2137                         break;
2138                 }
2139 #ifdef INET6
2140         case IPV6_VERSION >> 4:
2141                 {
2142                         /* its IPv6 */
2143                         struct ip6_hdr *ip6;
2144                         struct sockaddr_in6 *to6;
2145
2146                         ip6 = mtod(m, struct ip6_hdr *);
2147                         to6 = (struct sockaddr_in6 *)&to_store;
2148                         bzero(to6, sizeof(*to6));
2149                         to6->sin6_family = AF_INET6;
2150                         to6->sin6_len = sizeof(struct sockaddr_in6);
2151                         to6->sin6_addr = ip6->ip6_dst;
2152                         to6->sin6_port = sh->dest_port;
2153                         /* Get the scopes in properly to the sin6 addr's */
2154                         /* we probably don't need these operations */
2155                         (void)sa6_recoverscope(to6);
2156                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2157                         break;
2158                 }
2159 #endif
2160         default:
2161                 /* TSNH */
2162                 break;
2163         }
2164         if (sh->v_tag) {
2165                 /* we only go down this path if vtag is non-zero */
2166                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2167                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2168                 if (retval) {
2169                         return (retval);
2170                 }
2171         }
2172         find_tcp_pool = 0;
2173         if ((ch->chunk_type != SCTP_INITIATION) &&
2174             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2175             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2176             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2177                 /* Other chunk types go to the tcp pool. */
2178                 find_tcp_pool = 1;
2179         }
2180         if (inp_p) {
2181                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2182                     find_tcp_pool, vrf_id);
2183                 inp = *inp_p;
2184         } else {
2185                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2186                     find_tcp_pool, vrf_id);
2187         }
2188         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2189         if (retval == NULL && inp) {
2190                 /* Found a EP but not this address */
2191                 if ((ch->chunk_type == SCTP_INITIATION) ||
2192                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2193                         /*-
2194                          * special hook, we do NOT return linp or an
2195                          * association that is linked to an existing
2196                          * association that is under the TCP pool (i.e. no
2197                          * listener exists). The endpoint finding routine
2198                          * will always find a listener before examining the
2199                          * TCP pool.
2200                          */
2201                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2202                                 if (inp_p) {
2203                                         *inp_p = NULL;
2204                                 }
2205                                 return (NULL);
2206                         }
2207                         retval = sctp_findassociation_special_addr(m, iphlen,
2208                             offset, sh, &inp, netp, to);
2209                         if (inp_p != NULL) {
2210                                 *inp_p = inp;
2211                         }
2212                 }
2213         }
2214         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2215         return (retval);
2216 }
2217
2218 /*
2219  * lookup an association by an ASCONF lookup address.
2220  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2221  */
2222 struct sctp_tcb *
2223 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2224     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2225 {
2226         struct sctp_tcb *stcb;
2227         struct sockaddr_in *sin;
2228
2229 #ifdef INET6
2230         struct sockaddr_in6 *sin6;
2231
2232 #endif
2233         struct sockaddr_storage local_store, remote_store;
2234         struct sockaddr *to;
2235         struct ip *iph;
2236
2237 #ifdef INET6
2238         struct ip6_hdr *ip6;
2239
2240 #endif
2241         struct sctp_paramhdr parm_buf, *phdr;
2242         int ptype;
2243         int zero_address = 0;
2244
2245
2246         memset(&local_store, 0, sizeof(local_store));
2247         memset(&remote_store, 0, sizeof(remote_store));
2248         to = (struct sockaddr *)&local_store;
2249         /* First get the destination address setup too. */
2250         iph = mtod(m, struct ip *);
2251         switch (iph->ip_v) {
2252         case IPVERSION:
2253                 /* its IPv4 */
2254                 sin = (struct sockaddr_in *)&local_store;
2255                 sin->sin_family = AF_INET;
2256                 sin->sin_len = sizeof(*sin);
2257                 sin->sin_port = sh->dest_port;
2258                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2259                 break;
2260 #ifdef INET6
2261         case IPV6_VERSION >> 4:
2262                 /* its IPv6 */
2263                 ip6 = mtod(m, struct ip6_hdr *);
2264                 sin6 = (struct sockaddr_in6 *)&local_store;
2265                 sin6->sin6_family = AF_INET6;
2266                 sin6->sin6_len = sizeof(*sin6);
2267                 sin6->sin6_port = sh->dest_port;
2268                 sin6->sin6_addr = ip6->ip6_dst;
2269                 break;
2270 #endif
2271         default:
2272                 return NULL;
2273         }
2274
2275         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2276             &parm_buf, sizeof(struct sctp_paramhdr));
2277         if (phdr == NULL) {
2278                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2279                     __FUNCTION__);
2280                 return NULL;
2281         }
2282         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2283         /* get the correlation address */
2284         switch (ptype) {
2285 #ifdef INET6
2286         case SCTP_IPV6_ADDRESS:
2287                 {
2288                         /* ipv6 address param */
2289                         struct sctp_ipv6addr_param *p6, p6_buf;
2290
2291                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2292                                 return NULL;
2293                         }
2294                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2295                             offset + sizeof(struct sctp_asconf_chunk),
2296                             &p6_buf.ph, sizeof(*p6));
2297                         if (p6 == NULL) {
2298                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2299                                     __FUNCTION__);
2300                                 return (NULL);
2301                         }
2302                         sin6 = (struct sockaddr_in6 *)&remote_store;
2303                         sin6->sin6_family = AF_INET6;
2304                         sin6->sin6_len = sizeof(*sin6);
2305                         sin6->sin6_port = sh->src_port;
2306                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2307                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2308                                 zero_address = 1;
2309                         break;
2310                 }
2311 #endif
2312         case SCTP_IPV4_ADDRESS:
2313                 {
2314                         /* ipv4 address param */
2315                         struct sctp_ipv4addr_param *p4, p4_buf;
2316
2317                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2318                                 return NULL;
2319                         }
2320                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2321                             offset + sizeof(struct sctp_asconf_chunk),
2322                             &p4_buf.ph, sizeof(*p4));
2323                         if (p4 == NULL) {
2324                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2325                                     __FUNCTION__);
2326                                 return (NULL);
2327                         }
2328                         sin = (struct sockaddr_in *)&remote_store;
2329                         sin->sin_family = AF_INET;
2330                         sin->sin_len = sizeof(*sin);
2331                         sin->sin_port = sh->src_port;
2332                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2333                         if (sin->sin_addr.s_addr == INADDR_ANY)
2334                                 zero_address = 1;
2335                         break;
2336                 }
2337         default:
2338                 /* invalid address param type */
2339                 return NULL;
2340         }
2341
2342         if (zero_address) {
2343                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2344                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2345                 /*
2346                  * printf("findassociation_ep_asconf: zero lookup address
2347                  * finds stcb 0x%x\n", (uint32_t)stcb);
2348                  */
2349         } else {
2350                 stcb = sctp_findassociation_ep_addr(inp_p,
2351                     (struct sockaddr *)&remote_store, netp,
2352                     to, NULL);
2353         }
2354         return (stcb);
2355 }
2356
2357
2358 /*
2359  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2360  * addresses. This way if we don't get a bind we by default pick a ephemeral
2361  * port with all addresses bound.
2362  */
2363 int
2364 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2365 {
2366         /*
2367          * we get called when a new endpoint starts up. We need to allocate
2368          * the sctp_inpcb structure from the zone and init it. Mark it as
2369          * unbound and find a port that we can use as an ephemeral with
2370          * INADDR_ANY. If the user binds later no problem we can then add in
2371          * the specific addresses. And setup the default parameters for the
2372          * EP.
2373          */
2374         int i, error;
2375         struct sctp_inpcb *inp;
2376         struct sctp_pcb *m;
2377         struct timeval time;
2378         sctp_sharedkey_t *null_key;
2379
2380         error = 0;
2381
2382         SCTP_INP_INFO_WLOCK();
2383         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2384         if (inp == NULL) {
2385                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2386                 SCTP_INP_INFO_WUNLOCK();
2387                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2388                 return (ENOBUFS);
2389         }
2390         /* zap it */
2391         bzero(inp, sizeof(*inp));
2392
2393         /* bump generations */
2394         /* setup socket pointers */
2395         inp->sctp_socket = so;
2396         inp->ip_inp.inp.inp_socket = so;
2397         inp->sctp_associd_counter = 1;
2398         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2399         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2400         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2401         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2402         /* init the small hash table we use to track asocid <-> tcb */
2403         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2404         if (inp->sctp_asocidhash == NULL) {
2405                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2406                 SCTP_INP_INFO_WUNLOCK();
2407                 return (ENOBUFS);
2408         }
2409 #ifdef IPSEC
2410         {
2411                 struct inpcbpolicy *pcb_sp = NULL;
2412
2413                 error = ipsec_init_policy(so, &pcb_sp);
2414                 /* Arrange to share the policy */
2415                 inp->ip_inp.inp.inp_sp = pcb_sp;
2416                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2417         }
2418         if (error != 0) {
2419                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2420                 SCTP_INP_INFO_WUNLOCK();
2421                 return error;
2422         }
2423 #endif                          /* IPSEC */
2424         SCTP_INCR_EP_COUNT();
2425         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2426         SCTP_INP_INFO_WUNLOCK();
2427
2428         so->so_pcb = (caddr_t)inp;
2429
2430         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2431             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2432                 /* UDP style socket */
2433                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2434                     SCTP_PCB_FLAGS_UNBOUND);
2435                 /* Be sure it is NON-BLOCKING IO for UDP */
2436                 /* SCTP_SET_SO_NBIO(so); */
2437         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2438                 /* TCP style socket */
2439                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2440                     SCTP_PCB_FLAGS_UNBOUND);
2441                 /* Be sure we have blocking IO by default */
2442                 SCTP_CLEAR_SO_NBIO(so);
2443         } else {
2444                 /*
2445                  * unsupported socket type (RAW, etc)- in case we missed it
2446                  * in protosw
2447                  */
2448                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2449                 so->so_pcb = NULL;
2450                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2451                 return (EOPNOTSUPP);
2452         }
2453         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2454                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2455                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2456         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2457                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2458                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2459         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2460                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2461                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2462         }
2463         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2464             &inp->sctp_hashmark);
2465         if (inp->sctp_tcbhash == NULL) {
2466                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2467                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2468                 so->so_pcb = NULL;
2469                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2470                 return (ENOBUFS);
2471         }
2472         inp->def_vrf_id = vrf_id;
2473
2474         SCTP_INP_INFO_WLOCK();
2475         SCTP_INP_LOCK_INIT(inp);
2476         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2477         SCTP_INP_READ_INIT(inp);
2478         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2479         /* lock the new ep */
2480         SCTP_INP_WLOCK(inp);
2481
2482         /* add it to the info area */
2483         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2484         SCTP_INP_INFO_WUNLOCK();
2485
2486         TAILQ_INIT(&inp->read_queue);
2487         LIST_INIT(&inp->sctp_addr_list);
2488
2489         LIST_INIT(&inp->sctp_asoc_list);
2490
2491 #ifdef SCTP_TRACK_FREED_ASOCS
2492         /* TEMP CODE */
2493         LIST_INIT(&inp->sctp_asoc_free_list);
2494 #endif
2495         /* Init the timer structure for signature change */
2496         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2497         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2498
2499         /* now init the actual endpoint default data */
2500         m = &inp->sctp_ep;
2501
2502         /* setup the base timeout information */
2503         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2504         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2505         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2506         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2507         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2508         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2509         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2510         /* all max/min max are in ms */
2511         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2512         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2513         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2514         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2515         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2516
2517         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2518
2519         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2520         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2521         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2522         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2523         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2524         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2525         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2526
2527         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2528         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2529         /* number of streams to pre-open on a association */
2530         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2531
2532         /* Add adaptation cookie */
2533         m->adaptation_layer_indicator = 0x504C5253;
2534
2535         /* seed random number generator */
2536         m->random_counter = 1;
2537         m->store_at = SCTP_SIGNATURE_SIZE;
2538         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2539         sctp_fill_random_store(m);
2540
2541         /* Minimum cookie size */
2542         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2543             sizeof(struct sctp_state_cookie);
2544         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2545
2546         /* Setup the initial secret */
2547         (void)SCTP_GETTIME_TIMEVAL(&time);
2548         m->time_of_secret_change = time.tv_sec;
2549
2550         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2551                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2552         }
2553         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2554
2555         /* How long is a cookie good for ? */
2556         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2557         /*
2558          * Initialize authentication parameters
2559          */
2560         m->local_hmacs = sctp_default_supported_hmaclist();
2561         m->local_auth_chunks = sctp_alloc_chunklist();
2562         sctp_auth_set_default_chunks(m->local_auth_chunks);
2563         LIST_INIT(&m->shared_keys);
2564         /* add default NULL key as key id 0 */
2565         null_key = sctp_alloc_sharedkey();
2566         sctp_insert_sharedkey(&m->shared_keys, null_key);
2567         SCTP_INP_WUNLOCK(inp);
2568 #ifdef SCTP_LOG_CLOSING
2569         sctp_log_closing(inp, NULL, 12);
2570 #endif
2571         return (error);
2572 }
2573
2574
2575 void
2576 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2577     struct sctp_tcb *stcb)
2578 {
2579         struct sctp_nets *net;
2580         uint16_t lport, rport;
2581         struct sctppcbhead *head;
2582         struct sctp_laddr *laddr, *oladdr;
2583
2584         atomic_add_int(&stcb->asoc.refcnt, 1);
2585         SCTP_TCB_UNLOCK(stcb);
2586         SCTP_INP_INFO_WLOCK();
2587         SCTP_INP_WLOCK(old_inp);
2588         SCTP_INP_WLOCK(new_inp);
2589         SCTP_TCB_LOCK(stcb);
2590         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2591
2592         new_inp->sctp_ep.time_of_secret_change =
2593             old_inp->sctp_ep.time_of_secret_change;
2594         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2595             sizeof(old_inp->sctp_ep.secret_key));
2596         new_inp->sctp_ep.current_secret_number =
2597             old_inp->sctp_ep.current_secret_number;
2598         new_inp->sctp_ep.last_secret_number =
2599             old_inp->sctp_ep.last_secret_number;
2600         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2601
2602         /* make it so new data pours into the new socket */
2603         stcb->sctp_socket = new_inp->sctp_socket;
2604         stcb->sctp_ep = new_inp;
2605
2606         /* Copy the port across */
2607         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2608         rport = stcb->rport;
2609         /* Pull the tcb from the old association */
2610         LIST_REMOVE(stcb, sctp_tcbhash);
2611         LIST_REMOVE(stcb, sctp_tcblist);
2612         if (stcb->asoc.in_asocid_hash) {
2613                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2614         }
2615         /* Now insert the new_inp into the TCP connected hash */
2616         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2617
2618         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2619         /* Its safe to access */
2620         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2621
2622         /* Now move the tcb into the endpoint list */
2623         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2624         /*
2625          * Question, do we even need to worry about the ep-hash since we
2626          * only have one connection? Probably not :> so lets get rid of it
2627          * and not suck up any kernel memory in that.
2628          */
2629         if (stcb->asoc.in_asocid_hash) {
2630                 struct sctpasochead *lhd;
2631
2632                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2633                     new_inp->hashasocidmark)];
2634                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2635         }
2636         /* Ok. Let's restart timer. */
2637         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2638                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2639                     stcb, net);
2640         }
2641
2642         SCTP_INP_INFO_WUNLOCK();
2643         if (new_inp->sctp_tcbhash != NULL) {
2644                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2645                 new_inp->sctp_tcbhash = NULL;
2646         }
2647         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2648                 /* Subset bound, so copy in the laddr list from the old_inp */
2649                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2650                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2651                         if (laddr == NULL) {
2652                                 /*
2653                                  * Gak, what can we do? This assoc is really
2654                                  * HOSED. We probably should send an abort
2655                                  * here.
2656                                  */
2657                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2658                                 continue;
2659                         }
2660                         SCTP_INCR_LADDR_COUNT();
2661                         bzero(laddr, sizeof(*laddr));
2662                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2663                         laddr->ifa = oladdr->ifa;
2664                         atomic_add_int(&laddr->ifa->refcount, 1);
2665                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2666                             sctp_nxt_addr);
2667                         new_inp->laddr_count++;
2668                 }
2669         }
2670         /*
2671          * Now any running timers need to be adjusted since we really don't
2672          * care if they are running or not just blast in the new_inp into
2673          * all of them.
2674          */
2675
2676         stcb->asoc.hb_timer.ep = (void *)new_inp;
2677         stcb->asoc.dack_timer.ep = (void *)new_inp;
2678         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2679         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2680         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2681         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2682         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2683         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2684         /* now what about the nets? */
2685         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2686                 net->pmtu_timer.ep = (void *)new_inp;
2687                 net->rxt_timer.ep = (void *)new_inp;
2688                 net->fr_timer.ep = (void *)new_inp;
2689         }
2690         SCTP_INP_WUNLOCK(new_inp);
2691         SCTP_INP_WUNLOCK(old_inp);
2692 }
2693
2694
2695
2696
2697 /* sctp_ifap is used to bypass normal local address validation checks */
2698 int
2699 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2700     struct sctp_ifa *sctp_ifap, struct thread *p)
2701 {
2702         /* bind a ep to a socket address */
2703         struct sctppcbhead *head;
2704         struct sctp_inpcb *inp, *inp_tmp;
2705         struct inpcb *ip_inp;
2706         int port_reuse_active = 0;
2707         int bindall;
2708         uint16_t lport;
2709         int error;
2710         uint32_t vrf_id;
2711
2712         lport = 0;
2713         error = 0;
2714         bindall = 1;
2715         inp = (struct sctp_inpcb *)so->so_pcb;
2716         ip_inp = (struct inpcb *)so->so_pcb;
2717 #ifdef SCTP_DEBUG
2718         if (addr) {
2719                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2720                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2721                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2722                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2723         }
2724 #endif
2725         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2726                 /* already did a bind, subsequent binds NOT allowed ! */
2727                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2728                 return (EINVAL);
2729         }
2730 #ifdef INVARIANTS
2731         if (p == NULL)
2732                 panic("null proc/thread");
2733 #endif
2734         if (addr != NULL) {
2735                 switch (addr->sa_family) {
2736                 case AF_INET:
2737                         {
2738                                 struct sockaddr_in *sin;
2739
2740                                 /* IPV6_V6ONLY socket? */
2741                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2742                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2743                                         return (EINVAL);
2744                                 }
2745                                 if (addr->sa_len != sizeof(*sin)) {
2746                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2747                                         return (EINVAL);
2748                                 }
2749                                 sin = (struct sockaddr_in *)addr;
2750                                 lport = sin->sin_port;
2751                                 /*
2752                                  * For LOOPBACK the prison_local_ip4() call
2753                                  * will transmute the ip address to the
2754                                  * proper value.
2755                                  */
2756                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2757                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2758                                         return (error);
2759                                 }
2760                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2761                                         bindall = 0;
2762                                 }
2763                                 break;
2764                         }
2765 #ifdef INET6
2766                 case AF_INET6:
2767                         {
2768                                 /*
2769                                  * Only for pure IPv6 Address. (No IPv4
2770                                  * Mapped!)
2771                                  */
2772                                 struct sockaddr_in6 *sin6;
2773
2774                                 sin6 = (struct sockaddr_in6 *)addr;
2775
2776                                 if (addr->sa_len != sizeof(*sin6)) {
2777                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2778                                         return (EINVAL);
2779                                 }
2780                                 lport = sin6->sin6_port;
2781
2782                                 /*
2783                                  * For LOOPBACK the prison_local_ip6() call
2784                                  * will transmute the ipv6 address to the
2785                                  * proper value.
2786                                  */
2787                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2788                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2789                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2790                                         return (error);
2791                                 }
2792                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2793                                         bindall = 0;
2794                                         /* KAME hack: embed scopeid */
2795                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2796                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2797                                                 return (EINVAL);
2798                                         }
2799                                 }
2800                                 /* this must be cleared for ifa_ifwithaddr() */
2801                                 sin6->sin6_scope_id = 0;
2802                                 break;
2803                         }
2804 #endif
2805                 default:
2806                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2807                         return (EAFNOSUPPORT);
2808                 }
2809         }
2810         SCTP_INP_INFO_WLOCK();
2811         SCTP_INP_WLOCK(inp);
2812         /* Setup a vrf_id to be the default for the non-bind-all case. */
2813         vrf_id = inp->def_vrf_id;
2814
2815         /* increase our count due to the unlock we do */
2816         SCTP_INP_INCR_REF(inp);
2817         if (lport) {
2818                 /*
2819                  * Did the caller specify a port? if so we must see if a ep
2820                  * already has this one bound.
2821                  */
2822                 /* got to be root to get at low ports */
2823                 if (ntohs(lport) < IPPORT_RESERVED) {
2824                         if (p && (error =
2825                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2826                             )) {
2827                                 SCTP_INP_DECR_REF(inp);
2828                                 SCTP_INP_WUNLOCK(inp);
2829                                 SCTP_INP_INFO_WUNLOCK();
2830                                 return (error);
2831                         }
2832                 }
2833                 if (p == NULL) {
2834                         SCTP_INP_DECR_REF(inp);
2835                         SCTP_INP_WUNLOCK(inp);
2836                         SCTP_INP_INFO_WUNLOCK();
2837                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2838                         return (error);
2839                 }
2840                 SCTP_INP_WUNLOCK(inp);
2841                 if (bindall) {
2842                         vrf_id = inp->def_vrf_id;
2843                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2844                         if (inp_tmp != NULL) {
2845                                 /*
2846                                  * lock guy returned and lower count note
2847                                  * that we are not bound so inp_tmp should
2848                                  * NEVER be inp. And it is this inp
2849                                  * (inp_tmp) that gets the reference bump,
2850                                  * so we must lower it.
2851                                  */
2852                                 SCTP_INP_DECR_REF(inp_tmp);
2853                                 /* unlock info */
2854                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2855                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2856                                         /*
2857                                          * Ok, must be one-2-one and
2858                                          * allowing port re-use
2859                                          */
2860                                         port_reuse_active = 1;
2861                                         goto continue_anyway;
2862                                 }
2863                                 SCTP_INP_DECR_REF(inp);
2864                                 SCTP_INP_INFO_WUNLOCK();
2865                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2866                                 return (EADDRINUSE);
2867                         }
2868                 } else {
2869                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2870                         if (inp_tmp != NULL) {
2871                                 /*
2872                                  * lock guy returned and lower count note
2873                                  * that we are not bound so inp_tmp should
2874                                  * NEVER be inp. And it is this inp
2875                                  * (inp_tmp) that gets the reference bump,
2876                                  * so we must lower it.
2877                                  */
2878                                 SCTP_INP_DECR_REF(inp_tmp);
2879                                 /* unlock info */
2880                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2881                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2882                                         /*
2883                                          * Ok, must be one-2-one and
2884                                          * allowing port re-use
2885                                          */
2886                                         port_reuse_active = 1;
2887                                         goto continue_anyway;
2888                                 }
2889                                 SCTP_INP_DECR_REF(inp);
2890                                 SCTP_INP_INFO_WUNLOCK();
2891                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2892                                 return (EADDRINUSE);
2893                         }
2894                 }
2895 continue_anyway:
2896                 SCTP_INP_WLOCK(inp);
2897                 if (bindall) {
2898                         /* verify that no lport is not used by a singleton */
2899                         if ((port_reuse_active == 0) &&
2900                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2901                             ) {
2902                                 /* Sorry someone already has this one bound */
2903                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2904                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2905                                         port_reuse_active = 1;
2906                                 } else {
2907                                         SCTP_INP_DECR_REF(inp);
2908                                         SCTP_INP_WUNLOCK(inp);
2909                                         SCTP_INP_INFO_WUNLOCK();
2910                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2911                                         return (EADDRINUSE);
2912                                 }
2913                         }
2914                 }
2915         } else {
2916                 uint16_t first, last, candidate;
2917                 uint16_t count;
2918                 int done;
2919
2920                 if (ip_inp->inp_flags & INP_HIGHPORT) {
2921                         first = MODULE_GLOBAL(ipport_hifirstauto);
2922                         last = MODULE_GLOBAL(ipport_hilastauto);
2923                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
2924                         if (p && (error =
2925                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2926                             )) {
2927                                 SCTP_INP_DECR_REF(inp);
2928                                 SCTP_INP_WUNLOCK(inp);
2929                                 SCTP_INP_INFO_WUNLOCK();
2930                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2931                                 return (error);
2932                         }
2933                         first = MODULE_GLOBAL(ipport_lowfirstauto);
2934                         last = MODULE_GLOBAL(ipport_lowlastauto);
2935                 } else {
2936                         first = MODULE_GLOBAL(ipport_firstauto);
2937                         last = MODULE_GLOBAL(ipport_lastauto);
2938                 }
2939                 if (first > last) {
2940                         uint16_t temp;
2941
2942                         temp = first;
2943                         first = last;
2944                         last = temp;
2945                 }
2946                 count = last - first + 1;       /* number of candidates */
2947                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
2948
2949                 done = 0;
2950                 while (!done) {
2951                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
2952                                 done = 1;
2953                         }
2954                         if (!done) {
2955                                 if (--count == 0) {
2956                                         SCTP_INP_DECR_REF(inp);
2957                                         SCTP_INP_WUNLOCK(inp);
2958                                         SCTP_INP_INFO_WUNLOCK();
2959                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2960                                         return (EADDRINUSE);
2961                                 }
2962                                 if (candidate == last)
2963                                         candidate = first;
2964                                 else
2965                                         candidate = candidate + 1;
2966                         }
2967                 }
2968                 lport = htons(candidate);
2969         }
2970         SCTP_INP_DECR_REF(inp);
2971         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
2972             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
2973                 /*
2974                  * this really should not happen. The guy did a non-blocking
2975                  * bind and then did a close at the same time.
2976                  */
2977                 SCTP_INP_WUNLOCK(inp);
2978                 SCTP_INP_INFO_WUNLOCK();
2979                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2980                 return (EINVAL);
2981         }
2982         /* ok we look clear to give out this port, so lets setup the binding */
2983         if (bindall) {
2984                 /* binding to all addresses, so just set in the proper flags */
2985                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
2986                 /* set the automatic addr changes from kernel flag */
2987                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
2988                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2989                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2990                 } else {
2991                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
2992                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
2993                 }
2994                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
2995                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2996                 } else {
2997                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
2998                 }
2999                 /*
3000                  * set the automatic mobility_base from kernel flag (by
3001                  * micchie)
3002                  */
3003                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3004                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3005                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3006                 } else {
3007                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3008                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3009                 }
3010                 /*
3011                  * set the automatic mobility_fasthandoff from kernel flag
3012                  * (by micchie)
3013                  */
3014                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3015                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3016                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3017                 } else {
3018                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3019                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3020                 }
3021         } else {
3022                 /*
3023                  * bind specific, make sure flags is off and add a new
3024                  * address structure to the sctp_addr_list inside the ep
3025                  * structure.
3026                  *
3027                  * We will need to allocate one and insert it at the head. The
3028                  * socketopt call can just insert new addresses in there as
3029                  * well. It will also have to do the embed scope kame hack
3030                  * too (before adding).
3031                  */
3032                 struct sctp_ifa *ifa;
3033                 struct sockaddr_storage store_sa;
3034
3035                 memset(&store_sa, 0, sizeof(store_sa));
3036                 if (addr->sa_family == AF_INET) {
3037                         struct sockaddr_in *sin;
3038
3039                         sin = (struct sockaddr_in *)&store_sa;
3040                         memcpy(sin, addr, sizeof(struct sockaddr_in));
3041                         sin->sin_port = 0;
3042                 } else if (addr->sa_family == AF_INET6) {
3043                         struct sockaddr_in6 *sin6;
3044
3045                         sin6 = (struct sockaddr_in6 *)&store_sa;
3046                         memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3047                         sin6->sin6_port = 0;
3048                 }
3049                 /*
3050                  * first find the interface with the bound address need to
3051                  * zero out the port to find the address! yuck! can't do
3052                  * this earlier since need port for sctp_pcb_findep()
3053                  */
3054                 if (sctp_ifap != NULL)
3055                         ifa = sctp_ifap;
3056                 else {
3057                         /*
3058                          * Note for BSD we hit here always other O/S's will
3059                          * pass things in via the sctp_ifap argument
3060                          * (Panda).
3061                          */
3062                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3063                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3064                 }
3065                 if (ifa == NULL) {
3066                         /* Can't find an interface with that address */
3067                         SCTP_INP_WUNLOCK(inp);
3068                         SCTP_INP_INFO_WUNLOCK();
3069                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3070                         return (EADDRNOTAVAIL);
3071                 }
3072                 if (addr->sa_family == AF_INET6) {
3073                         /* GAK, more FIXME IFA lock? */
3074                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3075                                 /* Can't bind a non-existent addr. */
3076                                 SCTP_INP_WUNLOCK(inp);
3077                                 SCTP_INP_INFO_WUNLOCK();
3078                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3079                                 return (EINVAL);
3080                         }
3081                 }
3082                 /* we're not bound all */
3083                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3084                 /* allow bindx() to send ASCONF's for binding changes */
3085                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3086                 /* clear automatic addr changes from kernel flag */
3087                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3088
3089                 /* add this address to the endpoint list */
3090                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3091                 if (error != 0) {
3092                         SCTP_INP_WUNLOCK(inp);
3093                         SCTP_INP_INFO_WUNLOCK();
3094                         return (error);
3095                 }
3096                 inp->laddr_count++;
3097         }
3098         /* find the bucket */
3099         if (port_reuse_active) {
3100                 /* Put it into tcp 1-2-1 hash */
3101                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3102                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3103         } else {
3104                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3105         }
3106         /* put it in the bucket */
3107         LIST_INSERT_HEAD(head, inp, sctp_hash);
3108         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3109             head, ntohs(lport), port_reuse_active);
3110         /* set in the port */
3111         inp->sctp_lport = lport;
3112
3113         /* turn off just the unbound flag */
3114         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3115         SCTP_INP_WUNLOCK(inp);
3116         SCTP_INP_INFO_WUNLOCK();
3117         return (0);
3118 }
3119
3120
3121 static void
3122 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3123 {
3124         struct sctp_iterator *it, *nit;
3125
3126         /*
3127          * We enter with the only the ITERATOR_LOCK in place and a write
3128          * lock on the inp_info stuff.
3129          */
3130         it = sctp_it_ctl.cur_it;
3131         if (it && (it->vn != curvnet)) {
3132                 /* Its not looking at our VNET */
3133                 return;
3134         }
3135         if (it && (it->inp == inp)) {
3136                 /*
3137                  * This is tricky and we hold the iterator lock, but when it
3138                  * returns and gets the lock (when we release it) the
3139                  * iterator will try to operate on inp. We need to stop that
3140                  * from happening. But of course the iterator has a
3141                  * reference on the stcb and inp. We can mark it and it will
3142                  * stop.
3143                  *
3144                  * If its a single iterator situation, we set the end iterator
3145                  * flag. Otherwise we set the iterator to go to the next
3146                  * inp.
3147                  *
3148                  */
3149                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3150                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3151                 } else {
3152                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3153                 }
3154         }
3155         /*
3156          * Now go through and remove any single reference to our inp that
3157          * may be still pending on the list
3158          */
3159         SCTP_IPI_ITERATOR_WQ_LOCK();
3160         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3161                 if (it->vn != curvnet) {
3162                         continue;
3163                 }
3164                 if (it->inp == inp) {
3165                         /* This one points to me is it inp specific? */
3166                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3167                                 /* Remove and free this one */
3168                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3169                                     it, sctp_nxt_itr);
3170                                 if (it->function_atend != NULL) {
3171                                         (*it->function_atend) (it->pointer, it->val);
3172                                 }
3173                                 SCTP_FREE(it, SCTP_M_ITER);
3174                         } else {
3175                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3176                                 if (it->inp) {
3177                                         SCTP_INP_INCR_REF(it->inp);
3178                                 }
3179                         }
3180                         /*
3181                          * When its put in the refcnt is incremented so decr
3182                          * it
3183                          */
3184                         SCTP_INP_DECR_REF(inp);
3185                 }
3186         }
3187         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3188 }
3189
3190 /* release sctp_inpcb unbind the port */
3191 void
3192 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3193 {
3194         /*
3195          * Here we free a endpoint. We must find it (if it is in the Hash
3196          * table) and remove it from there. Then we must also find it in the
3197          * overall list and remove it from there. After all removals are
3198          * complete then any timer has to be stopped. Then start the actual
3199          * freeing. a) Any local lists. b) Any associations. c) The hash of
3200          * all associations. d) finally the ep itself.
3201          */
3202         struct sctp_pcb *m;
3203         struct sctp_tcb *asoc, *nasoc;
3204         struct sctp_laddr *laddr, *nladdr;
3205         struct inpcb *ip_pcb;
3206         struct socket *so;
3207         int being_refed = 0;
3208         struct sctp_queued_to_read *sq, *nsq;
3209         int cnt;
3210         sctp_sharedkey_t *shared_key, *nshared_key;
3211
3212
3213 #ifdef SCTP_LOG_CLOSING
3214         sctp_log_closing(inp, NULL, 0);
3215 #endif
3216         SCTP_ITERATOR_LOCK();
3217         /* mark any iterators on the list or being processed */
3218         sctp_iterator_inp_being_freed(inp);
3219         SCTP_ITERATOR_UNLOCK();
3220         so = inp->sctp_socket;
3221         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3222                 /* been here before.. eeks.. get out of here */
3223                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3224 #ifdef SCTP_LOG_CLOSING
3225                 sctp_log_closing(inp, NULL, 1);
3226 #endif
3227                 return;
3228         }
3229         SCTP_ASOC_CREATE_LOCK(inp);
3230         SCTP_INP_INFO_WLOCK();
3231
3232         SCTP_INP_WLOCK(inp);
3233         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3234                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3235                 /* socket is gone, so no more wakeups allowed */
3236                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3237                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3238                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3239
3240         }
3241         /* First time through we have the socket lock, after that no more. */
3242         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3243             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3244
3245         if (inp->control) {
3246                 sctp_m_freem(inp->control);
3247                 inp->control = NULL;
3248         }
3249         if (inp->pkt) {
3250                 sctp_m_freem(inp->pkt);
3251                 inp->pkt = NULL;
3252         }
3253         m = &inp->sctp_ep;
3254         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3255                                          * here but I will be nice :> (i.e.
3256                                          * ip_pcb = ep;) */
3257         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3258                 int cnt_in_sd;
3259
3260                 cnt_in_sd = 0;
3261                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3262                         SCTP_TCB_LOCK(asoc);
3263                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3264                                 /* Skip guys being freed */
3265                                 cnt_in_sd++;
3266                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3267                                         /*
3268                                          * Special case - we did not start a
3269                                          * kill timer on the asoc due to it
3270                                          * was not closed. So go ahead and
3271                                          * start it now.
3272                                          */
3273                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3274                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3275                                 }
3276                                 SCTP_TCB_UNLOCK(asoc);
3277                                 continue;
3278                         }
3279                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3280                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3281                             (asoc->asoc.total_output_queue_size == 0)) {
3282                                 /*
3283                                  * If we have data in queue, we don't want
3284                                  * to just free since the app may have done,
3285                                  * send()/close or connect/send/close. And
3286                                  * it wants the data to get across first.
3287                                  */
3288                                 /* Just abandon things in the front states */
3289                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3290                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3291                                         cnt_in_sd++;
3292                                 }
3293                                 continue;
3294                         }
3295                         /* Disconnect the socket please */
3296                         asoc->sctp_socket = NULL;
3297                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3298                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3299                             (asoc->asoc.control_pdapi) ||
3300                             (asoc->asoc.size_on_all_streams > 0) ||
3301                             (so && (so->so_rcv.sb_cc > 0))
3302                             ) {
3303                                 /* Left with Data unread */
3304                                 struct mbuf *op_err;
3305
3306                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3307                                     0, M_DONTWAIT, 1, MT_DATA);
3308                                 if (op_err) {
3309                                         /* Fill in the user initiated abort */
3310                                         struct sctp_paramhdr *ph;
3311                                         uint32_t *ippp;
3312
3313                                         SCTP_BUF_LEN(op_err) =
3314                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3315                                         ph = mtod(op_err,
3316                                             struct sctp_paramhdr *);
3317                                         ph->param_type = htons(
3318                                             SCTP_CAUSE_USER_INITIATED_ABT);
3319                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3320                                         ippp = (uint32_t *) (ph + 1);
3321                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3322                                 }
3323                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3324 #if defined(SCTP_PANIC_ON_ABORT)
3325                                 panic("inpcb_free does an abort");
3326 #endif
3327                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3328                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3329                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3330                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3331                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3332                                 }
3333                                 if (sctp_free_assoc(inp, asoc,
3334                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3335                                         cnt_in_sd++;
3336                                 }
3337                                 continue;
3338                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3339                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3340                                     (asoc->asoc.stream_queue_cnt == 0)
3341                             ) {
3342                                 if (asoc->asoc.locked_on_sending) {
3343                                         goto abort_anyway;
3344                                 }
3345                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3346                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3347                                         /*
3348                                          * there is nothing queued to send,
3349                                          * so I send shutdown
3350                                          */
3351                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3352                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3353                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3354                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3355                                         }
3356                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3357                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3358                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3359                                             asoc->asoc.primary_destination);
3360                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3361                                             asoc->asoc.primary_destination);
3362                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3363                                 }
3364                         } else {
3365                                 /* mark into shutdown pending */
3366                                 struct sctp_stream_queue_pending *sp;
3367
3368                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3369                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3370                                     asoc->asoc.primary_destination);
3371                                 if (asoc->asoc.locked_on_sending) {
3372                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3373                                             sctp_streamhead);
3374                                         if (sp == NULL) {
3375                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3376                                                     asoc->asoc.locked_on_sending,
3377                                                     asoc->asoc.locked_on_sending->stream_no);
3378                                         } else {
3379                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3380                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3381                                         }
3382                                 }
3383                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3384                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3385                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3386                                         struct mbuf *op_err;
3387
3388                         abort_anyway:
3389                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3390                                             0, M_DONTWAIT, 1, MT_DATA);
3391                                         if (op_err) {
3392                                                 /*
3393                                                  * Fill in the user
3394                                                  * initiated abort
3395                                                  */
3396                                                 struct sctp_paramhdr *ph;
3397                                                 uint32_t *ippp;
3398
3399                                                 SCTP_BUF_LEN(op_err) =
3400                                                     (sizeof(struct sctp_paramhdr) +
3401                                                     sizeof(uint32_t));
3402                                                 ph = mtod(op_err,
3403                                                     struct sctp_paramhdr *);
3404                                                 ph->param_type = htons(
3405                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3406                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3407                                                 ippp = (uint32_t *) (ph + 1);
3408                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3409                                         }
3410                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3411 #if defined(SCTP_PANIC_ON_ABORT)
3412                                         panic("inpcb_free does an abort");
3413 #endif
3414
3415                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3416                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3417                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3418                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3419                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3420                                         }
3421                                         if (sctp_free_assoc(inp, asoc,
3422                                             SCTP_PCBFREE_NOFORCE,
3423                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3424                                                 cnt_in_sd++;
3425                                         }
3426                                         continue;
3427                                 } else {
3428                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3429                                 }
3430                         }
3431                         cnt_in_sd++;
3432                         SCTP_TCB_UNLOCK(asoc);
3433                 }
3434                 /* now is there some left in our SHUTDOWN state? */
3435                 if (cnt_in_sd) {
3436 #ifdef SCTP_LOG_CLOSING
3437                         sctp_log_closing(inp, NULL, 2);
3438 #endif
3439                         inp->sctp_socket = NULL;
3440                         SCTP_INP_WUNLOCK(inp);
3441                         SCTP_ASOC_CREATE_UNLOCK(inp);
3442                         SCTP_INP_INFO_WUNLOCK();
3443                         return;
3444                 }
3445         }
3446         inp->sctp_socket = NULL;
3447         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3448             SCTP_PCB_FLAGS_UNBOUND) {
3449                 /*
3450                  * ok, this guy has been bound. It's port is somewhere in
3451                  * the SCTP_BASE_INFO(hash table). Remove it!
3452                  */
3453                 LIST_REMOVE(inp, sctp_hash);
3454                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3455         }
3456         /*
3457          * If there is a timer running to kill us, forget it, since it may
3458          * have a contest on the INP lock.. which would cause us to die ...
3459          */
3460         cnt = 0;
3461         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3462                 SCTP_TCB_LOCK(asoc);
3463                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3464                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3465                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3466                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3467                         }
3468                         cnt++;
3469                         SCTP_TCB_UNLOCK(asoc);
3470                         continue;
3471                 }
3472                 /* Free associations that are NOT killing us */
3473                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3474                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3475                         struct mbuf *op_err;
3476                         uint32_t *ippp;
3477
3478                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3479                             0, M_DONTWAIT, 1, MT_DATA);
3480                         if (op_err) {
3481                                 /* Fill in the user initiated abort */
3482                                 struct sctp_paramhdr *ph;
3483
3484                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3485                                     sizeof(uint32_t));
3486                                 ph = mtod(op_err, struct sctp_paramhdr *);
3487                                 ph->param_type = htons(
3488                                     SCTP_CAUSE_USER_INITIATED_ABT);
3489                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3490                                 ippp = (uint32_t *) (ph + 1);
3491                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3492
3493                         }
3494                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3495 #if defined(SCTP_PANIC_ON_ABORT)
3496                         panic("inpcb_free does an abort");
3497 #endif
3498                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3499                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3500                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3501                         cnt++;
3502                         SCTP_TCB_UNLOCK(asoc);
3503                         continue;
3504                 }
3505                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3506                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3507                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3508                 }
3509                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3510                         cnt++;
3511                 }
3512         }
3513         if (cnt) {
3514                 /* Ok we have someone out there that will kill us */
3515                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3516 #ifdef SCTP_LOG_CLOSING
3517                 sctp_log_closing(inp, NULL, 3);
3518 #endif
3519                 SCTP_INP_WUNLOCK(inp);
3520                 SCTP_ASOC_CREATE_UNLOCK(inp);
3521                 SCTP_INP_INFO_WUNLOCK();
3522                 return;
3523         }
3524         if (SCTP_INP_LOCK_CONTENDED(inp))
3525                 being_refed++;
3526         if (SCTP_INP_READ_CONTENDED(inp))
3527                 being_refed++;
3528         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3529                 being_refed++;
3530
3531         if ((inp->refcount) ||
3532             (being_refed) ||
3533             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3534                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3535 #ifdef SCTP_LOG_CLOSING
3536                 sctp_log_closing(inp, NULL, 4);
3537 #endif
3538                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3539                 SCTP_INP_WUNLOCK(inp);
3540                 SCTP_ASOC_CREATE_UNLOCK(inp);
3541                 SCTP_INP_INFO_WUNLOCK();
3542                 return;
3543         }
3544         inp->sctp_ep.signature_change.type = 0;
3545         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3546         /*
3547          * Remove it from the list .. last thing we need a lock for.
3548          */
3549         LIST_REMOVE(inp, sctp_list);
3550         SCTP_INP_WUNLOCK(inp);
3551         SCTP_ASOC_CREATE_UNLOCK(inp);
3552         SCTP_INP_INFO_WUNLOCK();
3553         /*
3554          * Now we release all locks. Since this INP cannot be found anymore
3555          * except possibly by the kill timer that might be running. We call
3556          * the drain function here. It should hit the case were it sees the
3557          * ACTIVE flag cleared and exit out freeing us to proceed and
3558          * destroy everything.
3559          */
3560         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3561                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3562         } else {
3563                 /* Probably un-needed */
3564                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3565         }
3566
3567 #ifdef SCTP_LOG_CLOSING
3568         sctp_log_closing(inp, NULL, 5);
3569 #endif
3570
3571
3572         if ((inp->sctp_asocidhash) != NULL) {
3573                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3574                 inp->sctp_asocidhash = NULL;
3575         }
3576         /* sa_ignore FREED_MEMORY */
3577         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3578                 /* Its only abandoned if it had data left */
3579                 if (sq->length)
3580                         SCTP_STAT_INCR(sctps_left_abandon);
3581
3582                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3583                 sctp_free_remote_addr(sq->whoFrom);
3584                 if (so)
3585                         so->so_rcv.sb_cc -= sq->length;
3586                 if (sq->data) {
3587                         sctp_m_freem(sq->data);
3588                         sq->data = NULL;
3589                 }
3590                 /*
3591                  * no need to free the net count, since at this point all
3592                  * assoc's are gone.
3593                  */
3594                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3595                 SCTP_DECR_READQ_COUNT();
3596         }
3597         /* Now the sctp_pcb things */
3598         /*
3599          * free each asoc if it is not already closed/free. we can't use the
3600          * macro here since le_next will get freed as part of the
3601          * sctp_free_assoc() call.
3602          */
3603         cnt = 0;
3604         if (so) {
3605 #ifdef IPSEC
3606                 ipsec_delete_pcbpolicy(ip_pcb);
3607 #endif                          /* IPSEC */
3608
3609                 /* Unlocks not needed since the socket is gone now */
3610         }
3611         if (ip_pcb->inp_options) {
3612                 (void)sctp_m_free(ip_pcb->inp_options);
3613                 ip_pcb->inp_options = 0;
3614         }
3615         if (ip_pcb->inp_moptions) {
3616                 inp_freemoptions(ip_pcb->inp_moptions);
3617                 ip_pcb->inp_moptions = 0;
3618         }
3619 #ifdef INET6
3620         if (ip_pcb->inp_vflag & INP_IPV6) {
3621                 struct in6pcb *in6p;
3622
3623                 in6p = (struct in6pcb *)inp;
3624                 ip6_freepcbopts(in6p->in6p_outputopts);
3625         }
3626 #endif                          /* INET6 */
3627         ip_pcb->inp_vflag = 0;
3628         /* free up authentication fields */
3629         if (inp->sctp_ep.local_auth_chunks != NULL)
3630                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3631         if (inp->sctp_ep.local_hmacs != NULL)
3632                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3633
3634         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3635                 LIST_REMOVE(shared_key, next);
3636                 sctp_free_sharedkey(shared_key);
3637                 /* sa_ignore FREED_MEMORY */
3638         }
3639
3640         /*
3641          * if we have an address list the following will free the list of
3642          * ifaddr's that are set into this ep. Again macro limitations here,
3643          * since the LIST_FOREACH could be a bad idea.
3644          */
3645         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3646                 sctp_remove_laddr(laddr);
3647         }
3648
3649 #ifdef SCTP_TRACK_FREED_ASOCS
3650         /* TEMP CODE */
3651         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3652                 LIST_REMOVE(asoc, sctp_tcblist);
3653                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3654                 SCTP_DECR_ASOC_COUNT();
3655         }
3656         /* *** END TEMP CODE *** */
3657 #endif
3658         /* Now lets see about freeing the EP hash table. */
3659         if (inp->sctp_tcbhash != NULL) {
3660                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3661                 inp->sctp_tcbhash = NULL;
3662         }
3663         /* Now we must put the ep memory back into the zone pool */
3664         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3665         SCTP_INP_LOCK_DESTROY(inp);
3666         SCTP_INP_READ_DESTROY(inp);
3667         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3668         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3669         SCTP_DECR_EP_COUNT();
3670 }
3671
3672
3673 struct sctp_nets *
3674 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3675 {
3676         struct sctp_nets *net;
3677
3678         /* locate the address */
3679         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3680                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3681                         return (net);
3682         }
3683         return (NULL);
3684 }
3685
3686
3687 int
3688 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3689 {
3690         struct sctp_ifa *sctp_ifa;
3691
3692         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3693         if (sctp_ifa) {
3694                 return (1);
3695         } else {
3696                 return (0);
3697         }
3698 }
3699
3700 /*
3701  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3702  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3703  * stats of stuff.
3704  */
3705 int
3706 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3707     int set_scope, int from)
3708 {
3709         /*
3710          * The following is redundant to the same lines in the
3711          * sctp_aloc_assoc() but is needed since others call the add address
3712          * function
3713          */
3714         struct sctp_nets *net, *netfirst;
3715         int addr_inscope;
3716
3717         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3718             from);
3719         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3720
3721         netfirst = sctp_findnet(stcb, newaddr);
3722         if (netfirst) {
3723                 /*
3724                  * Lie and return ok, we don't want to make the association
3725                  * go away for this behavior. It will happen in the TCP
3726                  * model in a connected socket. It does not reach the hash
3727                  * table until after the association is built so it can't be
3728                  * found. Mark as reachable, since the initial creation will
3729                  * have been cleared and the NOT_IN_ASSOC flag will have
3730                  * been added... and we don't want to end up removing it
3731                  * back out.
3732                  */
3733                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3734                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3735                             SCTP_ADDR_UNCONFIRMED);
3736                 } else {
3737                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3738                 }
3739
3740                 return (0);
3741         }
3742         addr_inscope = 1;
3743         if (newaddr->sa_family == AF_INET) {
3744                 struct sockaddr_in *sin;
3745
3746                 sin = (struct sockaddr_in *)newaddr;
3747                 if (sin->sin_addr.s_addr == 0) {
3748                         /* Invalid address */
3749                         return (-1);
3750                 }
3751                 /* zero out the bzero area */
3752                 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3753
3754                 /* assure len is set */
3755                 sin->sin_len = sizeof(struct sockaddr_in);
3756                 if (set_scope) {
3757 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3758                         stcb->ipv4_local_scope = 1;
3759 #else
3760                         if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3761                                 stcb->asoc.ipv4_local_scope = 1;
3762                         }
3763 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3764                 } else {
3765                         /* Validate the address is in scope */
3766                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3767                             (stcb->asoc.ipv4_local_scope == 0)) {
3768                                 addr_inscope = 0;
3769                         }
3770                 }
3771 #ifdef INET6
3772         } else if (newaddr->sa_family == AF_INET6) {
3773                 struct sockaddr_in6 *sin6;
3774
3775                 sin6 = (struct sockaddr_in6 *)newaddr;
3776                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3777                         /* Invalid address */
3778                         return (-1);
3779                 }
3780                 /* assure len is set */
3781                 sin6->sin6_len = sizeof(struct sockaddr_in6);
3782                 if (set_scope) {
3783                         if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3784                                 stcb->asoc.loopback_scope = 1;
3785                                 stcb->asoc.local_scope = 0;
3786                                 stcb->asoc.ipv4_local_scope = 1;
3787                                 stcb->asoc.site_scope = 1;
3788                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3789                                 /*
3790                                  * If the new destination is a LINK_LOCAL we
3791                                  * must have common site scope. Don't set
3792                                  * the local scope since we may not share
3793                                  * all links, only loopback can do this.
3794                                  * Links on the local network would also be
3795                                  * on our private network for v4 too.
3796                                  */
3797                                 stcb->asoc.ipv4_local_scope = 1;
3798                                 stcb->asoc.site_scope = 1;
3799                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3800                                 /*
3801                                  * If the new destination is SITE_LOCAL then
3802                                  * we must have site scope in common.
3803                                  */
3804                                 stcb->asoc.site_scope = 1;
3805                         }
3806                 } else {
3807                         /* Validate the address is in scope */
3808                         if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3809                             (stcb->asoc.loopback_scope == 0)) {
3810                                 addr_inscope = 0;
3811                         } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3812                             (stcb->asoc.local_scope == 0)) {
3813                                 addr_inscope = 0;
3814                         } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3815                             (stcb->asoc.site_scope == 0)) {
3816                                 addr_inscope = 0;
3817                         }
3818                 }
3819 #endif
3820         } else {
3821                 /* not supported family type */
3822                 return (-1);
3823         }
3824         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3825         if (net == NULL) {
3826                 return (-1);
3827         }
3828         SCTP_INCR_RADDR_COUNT();
3829         bzero(net, sizeof(*net));
3830         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3831         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3832         if (newaddr->sa_family == AF_INET) {
3833                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3834         } else if (newaddr->sa_family == AF_INET6) {
3835                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3836         }
3837         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3838         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3839                 stcb->asoc.loopback_scope = 1;
3840                 stcb->asoc.ipv4_local_scope = 1;
3841                 stcb->asoc.local_scope = 0;
3842                 stcb->asoc.site_scope = 1;
3843                 addr_inscope = 1;
3844         }
3845         net->failure_threshold = stcb->asoc.def_net_failure;
3846         if (addr_inscope == 0) {
3847                 net->dest_state = (SCTP_ADDR_REACHABLE |
3848                     SCTP_ADDR_OUT_OF_SCOPE);
3849         } else {
3850                 if (from == SCTP_ADDR_IS_CONFIRMED)
3851                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3852                         net->dest_state = SCTP_ADDR_REACHABLE;
3853                 else
3854                         net->dest_state = SCTP_ADDR_REACHABLE |
3855                             SCTP_ADDR_UNCONFIRMED;
3856         }
3857         /*
3858          * We set this to 0, the timer code knows that this means its an
3859          * initial value
3860          */
3861         net->rto_needed = 1;
3862         net->RTO = 0;
3863         net->RTO_measured = 0;
3864         stcb->asoc.numnets++;
3865         *(&net->ref_count) = 1;
3866         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3867         net->tos_flowlabel = 0;
3868         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
3869                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
3870         } else {
3871                 net->port = 0;
3872         }
3873 #ifdef INET
3874         if (newaddr->sa_family == AF_INET)
3875                 net->tos_flowlabel = stcb->asoc.default_tos;
3876 #endif
3877 #ifdef INET6
3878         if (newaddr->sa_family == AF_INET6)
3879                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
3880 #endif
3881         /* Init the timer structure */
3882         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3883         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
3884         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3885
3886         /* Now generate a route for this guy */
3887 #ifdef INET6
3888         /* KAME hack: embed scopeid */
3889         if (newaddr->sa_family == AF_INET6) {
3890                 struct sockaddr_in6 *sin6;
3891
3892                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3893                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3894                 sin6->sin6_scope_id = 0;
3895         }
3896 #endif
3897         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3898
3899         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3900                 /* Get source address */
3901                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3902                     stcb,
3903                     (sctp_route_t *) & net->ro,
3904                     net,
3905                     0,
3906                     stcb->asoc.vrf_id);
3907                 /* Now get the interface MTU */
3908                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
3909                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3910                 } else {
3911                         net->mtu = 0;
3912                 }
3913                 if (net->mtu == 0) {
3914                         /* Huh ?? */
3915                         net->mtu = SCTP_DEFAULT_MTU;
3916                 } else {
3917                         uint32_t rmtu;
3918
3919                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3920                         if (rmtu == 0) {
3921                                 /*
3922                                  * Start things off to match mtu of
3923                                  * interface please.
3924                                  */
3925                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3926                                     net->ro.ro_rt, net->mtu);
3927                         } else {
3928                                 /*
3929                                  * we take the route mtu over the interface,
3930                                  * since the route may be leading out the
3931                                  * loopback, or a different interface.
3932                                  */
3933                                 net->mtu = rmtu;
3934                         }
3935                 }
3936                 if (from == SCTP_ALLOC_ASOC) {
3937                         stcb->asoc.smallest_mtu = net->mtu;
3938                 }
3939         } else {
3940                 net->mtu = stcb->asoc.smallest_mtu;
3941         }
3942 #ifdef INET6
3943         if (newaddr->sa_family == AF_INET6) {
3944                 struct sockaddr_in6 *sin6;
3945
3946                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3947                 (void)sa6_recoverscope(sin6);
3948         }
3949 #endif
3950         if (net->port) {
3951                 net->mtu -= sizeof(struct udphdr);
3952         }
3953         if (stcb->asoc.smallest_mtu > net->mtu) {
3954                 stcb->asoc.smallest_mtu = net->mtu;
3955         }
3956         /* JRS - Use the congestion control given in the CC module */
3957         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
3958                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
3959
3960         /*
3961          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
3962          * of assoc (2005/06/27, iyengar@cis.udel.edu)
3963          */
3964         net->find_pseudo_cumack = 1;
3965         net->find_rtx_pseudo_cumack = 1;
3966         net->src_addr_selected = 0;
3967         /* Choose an initial flowid. */
3968         net->flowid = stcb->asoc.my_vtag ^
3969             ntohs(stcb->rport) ^
3970             ntohs(stcb->sctp_ep->sctp_lport);
3971 #ifdef INVARIANTS
3972         net->flowidset = 1;
3973 #endif
3974         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
3975         if (net->ro.ro_rt == NULL) {
3976                 /* Since we have no route put it at the back */
3977                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
3978         } else if (netfirst == NULL) {
3979                 /* We are the first one in the pool. */
3980                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3981         } else if (netfirst->ro.ro_rt == NULL) {
3982                 /*
3983                  * First one has NO route. Place this one ahead of the first
3984                  * one.
3985                  */
3986                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3987         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
3988                 /*
3989                  * This one has a different interface than the one at the
3990                  * top of the list. Place it ahead.
3991                  */
3992                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
3993         } else {
3994                 /*
3995                  * Ok we have the same interface as the first one. Move
3996                  * forward until we find either a) one with a NULL route...
3997                  * insert ahead of that b) one with a different ifp.. insert
3998                  * after that. c) end of the list.. insert at the tail.
3999                  */
4000                 struct sctp_nets *netlook;
4001
4002                 do {
4003                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4004                         if (netlook == NULL) {
4005                                 /* End of the list */
4006                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4007                                 break;
4008                         } else if (netlook->ro.ro_rt == NULL) {
4009                                 /* next one has NO route */
4010                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4011                                 break;
4012                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4013                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4014                                     net, sctp_next);
4015                                 break;
4016                         }
4017                         /* Shift forward */
4018                         netfirst = netlook;
4019                 } while (netlook != NULL);
4020         }
4021
4022         /* got to have a primary set */
4023         if (stcb->asoc.primary_destination == 0) {
4024                 stcb->asoc.primary_destination = net;
4025         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4026                     (net->ro.ro_rt) &&
4027             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4028                 /* No route to current primary adopt new primary */
4029                 stcb->asoc.primary_destination = net;
4030         }
4031         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
4032             net);
4033         /* Validate primary is first */
4034         net = TAILQ_FIRST(&stcb->asoc.nets);
4035         if ((net != stcb->asoc.primary_destination) &&
4036             (stcb->asoc.primary_destination)) {
4037                 /*
4038                  * first one on the list is NOT the primary sctp_cmpaddr()
4039                  * is much more efficient if the primary is the first on the
4040                  * list, make it so.
4041                  */
4042                 TAILQ_REMOVE(&stcb->asoc.nets,
4043                     stcb->asoc.primary_destination, sctp_next);
4044                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4045                     stcb->asoc.primary_destination, sctp_next);
4046         }
4047         return (0);
4048 }
4049
4050
4051 static uint32_t
4052 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4053 {
4054         uint32_t id;
4055         struct sctpasochead *head;
4056         struct sctp_tcb *lstcb;
4057
4058         SCTP_INP_WLOCK(inp);
4059 try_again:
4060         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4061                 /* TSNH */
4062                 SCTP_INP_WUNLOCK(inp);
4063                 return (0);
4064         }
4065         /*
4066          * We don't allow assoc id to be 0, this is needed otherwise if the
4067          * id were to wrap we would have issues with some socket options.
4068          */
4069         if (inp->sctp_associd_counter == 0) {
4070                 inp->sctp_associd_counter++;
4071         }
4072         id = inp->sctp_associd_counter;
4073         inp->sctp_associd_counter++;
4074         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4075         if (lstcb) {
4076                 goto try_again;
4077         }
4078         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4079         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4080         stcb->asoc.in_asocid_hash = 1;
4081         SCTP_INP_WUNLOCK(inp);
4082         return id;
4083 }
4084
4085 /*
4086  * allocate an association and add it to the endpoint. The caller must be
4087  * careful to add all additional addresses once they are know right away or
4088  * else the assoc will be may experience a blackout scenario.
4089  */
4090 struct sctp_tcb *
4091 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4092     int *error, uint32_t override_tag, uint32_t vrf_id,
4093     struct thread *p
4094 )
4095 {
4096         /* note the p argument is only valid in unbound sockets */
4097
4098         struct sctp_tcb *stcb;
4099         struct sctp_association *asoc;
4100         struct sctpasochead *head;
4101         uint16_t rport;
4102         int err;
4103
4104         /*
4105          * Assumption made here: Caller has done a
4106          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4107          * address does not exist already.
4108          */
4109         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4110                 /* Hit max assoc, sorry no more */
4111                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4112                 *error = ENOBUFS;
4113                 return (NULL);
4114         }
4115         if (firstaddr == NULL) {
4116                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4117                 *error = EINVAL;
4118                 return (NULL);
4119         }
4120         SCTP_INP_RLOCK(inp);
4121         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4122             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4123             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4124                 /*
4125                  * If its in the TCP pool, its NOT allowed to create an
4126                  * association. The parent listener needs to call
4127                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4128                  * off, or connected one does this.. its an error.
4129                  */
4130                 SCTP_INP_RUNLOCK(inp);
4131                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4132                 *error = EINVAL;
4133                 return (NULL);
4134         }
4135         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4136 #ifdef SCTP_DEBUG
4137         if (firstaddr) {
4138                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4139                 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4140                     ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4141         } else {
4142                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4143         }
4144 #endif                          /* SCTP_DEBUG */
4145         if (firstaddr->sa_family == AF_INET) {
4146                 struct sockaddr_in *sin;
4147
4148                 sin = (struct sockaddr_in *)firstaddr;
4149                 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4150                         /* Invalid address */
4151                         SCTP_INP_RUNLOCK(inp);
4152                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4153                         *error = EINVAL;
4154                         return (NULL);
4155                 }
4156                 rport = sin->sin_port;
4157         } else if (firstaddr->sa_family == AF_INET6) {
4158                 struct sockaddr_in6 *sin6;
4159
4160                 sin6 = (struct sockaddr_in6 *)firstaddr;
4161                 if ((sin6->sin6_port == 0) ||
4162                     (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4163                         /* Invalid address */
4164                         SCTP_INP_RUNLOCK(inp);
4165                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4166                         *error = EINVAL;
4167                         return (NULL);
4168                 }
4169                 rport = sin6->sin6_port;
4170         } else {
4171                 /* not supported family type */
4172                 SCTP_INP_RUNLOCK(inp);
4173                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4174                 *error = EINVAL;
4175                 return (NULL);
4176         }
4177         SCTP_INP_RUNLOCK(inp);
4178         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4179                 /*
4180                  * If you have not performed a bind, then we need to do the
4181                  * ephemeral bind for you.
4182                  */
4183                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4184                     (struct sockaddr *)NULL,
4185                     (struct sctp_ifa *)NULL,
4186                     p
4187                     ))) {
4188                         /* bind error, probably perm */
4189                         *error = err;
4190                         return (NULL);
4191                 }
4192         }
4193         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4194         if (stcb == NULL) {
4195                 /* out of memory? */
4196                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4197                 *error = ENOMEM;
4198                 return (NULL);
4199         }
4200         SCTP_INCR_ASOC_COUNT();
4201
4202         bzero(stcb, sizeof(*stcb));
4203         asoc = &stcb->asoc;
4204
4205         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4206         SCTP_TCB_LOCK_INIT(stcb);
4207         SCTP_TCB_SEND_LOCK_INIT(stcb);
4208         stcb->rport = rport;
4209         /* setup back pointer's */
4210         stcb->sctp_ep = inp;
4211         stcb->sctp_socket = inp->sctp_socket;
4212         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4213                 /* failed */
4214                 SCTP_TCB_LOCK_DESTROY(stcb);
4215                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4216                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4217                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4218                 SCTP_DECR_ASOC_COUNT();
4219                 *error = err;
4220                 return (NULL);
4221         }
4222         /* and the port */
4223         SCTP_INP_INFO_WLOCK();
4224         SCTP_INP_WLOCK(inp);
4225         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4226                 /* inpcb freed while alloc going on */
4227                 SCTP_TCB_LOCK_DESTROY(stcb);
4228                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4229                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4230                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4231                 SCTP_INP_WUNLOCK(inp);
4232                 SCTP_INP_INFO_WUNLOCK();
4233                 SCTP_DECR_ASOC_COUNT();
4234                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4235                 *error = EINVAL;
4236                 return (NULL);
4237         }
4238         SCTP_TCB_LOCK(stcb);
4239
4240         /* now that my_vtag is set, add it to the hash */
4241         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4242         /* put it in the bucket in the vtag hash of assoc's for the system */
4243         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4244         SCTP_INP_INFO_WUNLOCK();
4245
4246         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4247                 /* failure.. memory error? */
4248                 if (asoc->strmout) {
4249                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4250                         asoc->strmout = NULL;
4251                 }
4252                 if (asoc->mapping_array) {
4253                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4254                         asoc->mapping_array = NULL;
4255                 }
4256                 if (asoc->nr_mapping_array) {
4257                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4258                         asoc->nr_mapping_array = NULL;
4259                 }
4260                 SCTP_DECR_ASOC_COUNT();
4261                 SCTP_TCB_LOCK_DESTROY(stcb);
4262                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4263                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4264                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4265                 SCTP_INP_WUNLOCK(inp);
4266                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4267                 *error = ENOBUFS;
4268                 return (NULL);
4269         }
4270         /* Init all the timers */
4271         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4272         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4273         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4274         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4275         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4276         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4277         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4278         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4279
4280         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4281         /* now file the port under the hash as well */
4282         if (inp->sctp_tcbhash != NULL) {
4283                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4284                     inp->sctp_hashmark)];
4285                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4286         }
4287         SCTP_INP_WUNLOCK(inp);
4288         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4289         return (stcb);
4290 }
4291
4292
4293 void
4294 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4295 {
4296         struct sctp_association *asoc;
4297
4298         asoc = &stcb->asoc;
4299         asoc->numnets--;
4300         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4301         if (net == asoc->primary_destination) {
4302                 /* Reset primary */
4303                 struct sctp_nets *lnet;
4304
4305                 lnet = TAILQ_FIRST(&asoc->nets);
4306                 /*
4307                  * Mobility adaptation Ideally, if deleted destination is
4308                  * the primary, it becomes a fast retransmission trigger by
4309                  * the subsequent SET PRIMARY. (by micchie)
4310                  */
4311                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4312                     SCTP_MOBILITY_BASE) ||
4313                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4314                     SCTP_MOBILITY_FASTHANDOFF)) {
4315                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4316                         if (asoc->deleted_primary != NULL) {
4317                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4318                                 goto out;
4319                         }
4320                         asoc->deleted_primary = net;
4321                         atomic_add_int(&net->ref_count, 1);
4322                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4323                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4324                         sctp_mobility_feature_on(stcb->sctp_ep,
4325                             SCTP_MOBILITY_PRIM_DELETED);
4326                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4327                             stcb->sctp_ep, stcb, NULL);
4328                 }
4329 out:
4330                 /* Try to find a confirmed primary */
4331                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4332         }
4333         if (net == asoc->last_data_chunk_from) {
4334                 /* Reset primary */
4335                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4336         }
4337         if (net == asoc->last_control_chunk_from) {
4338                 /* Clear net */
4339                 asoc->last_control_chunk_from = NULL;
4340         }
4341         sctp_free_remote_addr(net);
4342 }
4343
4344 /*
4345  * remove a remote endpoint address from an association, it will fail if the
4346  * address does not exist.
4347  */
4348 int
4349 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4350 {
4351         /*
4352          * Here we need to remove a remote address. This is quite simple, we
4353          * first find it in the list of address for the association
4354          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4355          * on that item. Note we do not allow it to be removed if there are
4356          * no other addresses.
4357          */
4358         struct sctp_association *asoc;
4359         struct sctp_nets *net, *nnet;
4360
4361         asoc = &stcb->asoc;
4362
4363         /* locate the address */
4364         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4365                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4366                         continue;
4367                 }
4368                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4369                     remaddr)) {
4370                         /* we found the guy */
4371                         if (asoc->numnets < 2) {
4372                                 /* Must have at LEAST two remote addresses */
4373                                 return (-1);
4374                         } else {
4375                                 sctp_remove_net(stcb, net);
4376                                 return (0);
4377                         }
4378                 }
4379         }
4380         /* not found. */
4381         return (-2);
4382 }
4383
4384 void
4385 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4386 {
4387         struct sctpvtaghead *chain;
4388         struct sctp_tagblock *twait_block;
4389         int found = 0;
4390         int i;
4391
4392         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4393         if (!LIST_EMPTY(chain)) {
4394                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4395                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4396                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4397                                     (twait_block->vtag_block[i].lport == lport) &&
4398                                     (twait_block->vtag_block[i].rport == rport)) {
4399                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4400                                         twait_block->vtag_block[i].v_tag = 0;
4401                                         twait_block->vtag_block[i].lport = 0;
4402                                         twait_block->vtag_block[i].rport = 0;
4403                                         found = 1;
4404                                         break;
4405                                 }
4406                         }
4407                         if (found)
4408                                 break;
4409                 }
4410         }
4411 }
4412
4413 int
4414 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4415 {
4416         struct sctpvtaghead *chain;
4417         struct sctp_tagblock *twait_block;
4418         int found = 0;
4419         int i;
4420
4421         SCTP_INP_INFO_WLOCK();
4422         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4423         if (!LIST_EMPTY(chain)) {
4424                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4425                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4426                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4427                                     (twait_block->vtag_block[i].lport == lport) &&
4428                                     (twait_block->vtag_block[i].rport == rport)) {
4429                                         found = 1;
4430                                         break;
4431                                 }
4432                         }
4433                         if (found)
4434                                 break;
4435                 }
4436         }
4437         SCTP_INP_INFO_WUNLOCK();
4438         return (found);
4439 }
4440
4441
4442 void
4443 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4444 {
4445         struct sctpvtaghead *chain;
4446         struct sctp_tagblock *twait_block;
4447         struct timeval now;
4448         int set, i;
4449
4450         if (time == 0) {
4451                 /* Its disabled */
4452                 return;
4453         }
4454         (void)SCTP_GETTIME_TIMEVAL(&now);
4455         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4456         set = 0;
4457         if (!LIST_EMPTY(chain)) {
4458                 /* Block(s) present, lets find space, and expire on the fly */
4459                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4460                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4461                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4462                                     !set) {
4463                                         twait_block->vtag_block[i].tv_sec_at_expire =
4464                                             now.tv_sec + time;
4465                                         twait_block->vtag_block[i].v_tag = tag;
4466                                         twait_block->vtag_block[i].lport = lport;
4467                                         twait_block->vtag_block[i].rport = rport;
4468                                         set = 1;
4469                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4470                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4471                                         /* Audit expires this guy */
4472                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4473                                         twait_block->vtag_block[i].v_tag = 0;
4474                                         twait_block->vtag_block[i].lport = 0;
4475                                         twait_block->vtag_block[i].rport = 0;
4476                                         if (set == 0) {
4477                                                 /* Reuse it for my new tag */
4478                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4479                                                 twait_block->vtag_block[i].v_tag = tag;
4480                                                 twait_block->vtag_block[i].lport = lport;
4481                                                 twait_block->vtag_block[i].rport = rport;
4482                                                 set = 1;
4483                                         }
4484                                 }
4485                         }
4486                         if (set) {
4487                                 /*
4488                                  * We only do up to the block where we can
4489                                  * place our tag for audits
4490                                  */
4491                                 break;
4492                         }
4493                 }
4494         }
4495         /* Need to add a new block to chain */
4496         if (!set) {
4497                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4498                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4499                 if (twait_block == NULL) {
4500 #ifdef INVARIANTS
4501                         panic("Can not alloc tagblock");
4502 #endif
4503                         return;
4504                 }
4505                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4506                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4507                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4508                 twait_block->vtag_block[0].v_tag = tag;
4509                 twait_block->vtag_block[0].lport = lport;
4510                 twait_block->vtag_block[0].rport = rport;
4511         }
4512 }
4513
4514
4515
4516 /*-
4517  * Free the association after un-hashing the remote port. This
4518  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4519  * expect that the input to this function IS a locked TCB.
4520  * It will return 0, if it did NOT destroy the association (instead
4521  * it unlocks it. It will return NON-zero if it either destroyed the
4522  * association OR the association is already destroyed.
4523  */
4524 int
4525 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4526 {
4527         int i;
4528         struct sctp_association *asoc;
4529         struct sctp_nets *net, *nnet;
4530         struct sctp_laddr *laddr, *naddr;
4531         struct sctp_tmit_chunk *chk, *nchk;
4532         struct sctp_asconf_addr *aparam, *naparam;
4533         struct sctp_asconf_ack *aack, *naack;
4534         struct sctp_stream_reset_list *strrst, *nstrrst;
4535         struct sctp_queued_to_read *sq, *nsq;
4536         struct sctp_stream_queue_pending *sp, *nsp;
4537         sctp_sharedkey_t *shared_key, *nshared_key;
4538         struct socket *so;
4539
4540         /* first, lets purge the entry from the hash table. */
4541
4542 #ifdef SCTP_LOG_CLOSING
4543         sctp_log_closing(inp, stcb, 6);
4544 #endif
4545         if (stcb->asoc.state == 0) {
4546 #ifdef SCTP_LOG_CLOSING
4547                 sctp_log_closing(inp, NULL, 7);
4548 #endif
4549                 /* there is no asoc, really TSNH :-0 */
4550                 return (1);
4551         }
4552         /* TEMP CODE */
4553         if (stcb->freed_from_where == 0) {
4554                 /* Only record the first place free happened from */
4555                 stcb->freed_from_where = from_location;
4556         }
4557         /* TEMP CODE */
4558
4559         asoc = &stcb->asoc;
4560         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4561             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4562                 /* nothing around */
4563                 so = NULL;
4564         else
4565                 so = inp->sctp_socket;
4566
4567         /*
4568          * We used timer based freeing if a reader or writer is in the way.
4569          * So we first check if we are actually being called from a timer,
4570          * if so we abort early if a reader or writer is still in the way.
4571          */
4572         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4573             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4574                 /*
4575                  * is it the timer driving us? if so are the reader/writers
4576                  * gone?
4577                  */
4578                 if (stcb->asoc.refcnt) {
4579                         /* nope, reader or writer in the way */
4580                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4581                         /* no asoc destroyed */
4582                         SCTP_TCB_UNLOCK(stcb);
4583 #ifdef SCTP_LOG_CLOSING
4584                         sctp_log_closing(inp, stcb, 8);
4585 #endif
4586                         return (0);
4587                 }
4588         }
4589         /* now clean up any other timers */
4590         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4591         asoc->hb_timer.self = NULL;
4592         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4593         asoc->dack_timer.self = NULL;
4594         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4595         /*-
4596          * For stream reset we don't blast this unless
4597          * it is a str-reset timer, it might be the
4598          * free-asoc timer which we DON'T want to
4599          * disturb.
4600          */
4601         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4602                 asoc->strreset_timer.self = NULL;
4603         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4604         asoc->asconf_timer.self = NULL;
4605         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4606         asoc->autoclose_timer.self = NULL;
4607         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4608         asoc->shut_guard_timer.self = NULL;
4609         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4610         asoc->delayed_event_timer.self = NULL;
4611         /* Mobility adaptation */
4612         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4613         asoc->delete_prim_timer.self = NULL;
4614         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4615                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4616                 net->fr_timer.self = NULL;
4617                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4618                 net->rxt_timer.self = NULL;
4619                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4620                 net->pmtu_timer.self = NULL;
4621         }
4622         /* Now the read queue needs to be cleaned up (only once) */
4623         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4624                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4625                 SCTP_INP_READ_LOCK(inp);
4626                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4627                         if (sq->stcb == stcb) {
4628                                 sq->do_not_ref_stcb = 1;
4629                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4630                                 /*
4631                                  * If there is no end, there never will be
4632                                  * now.
4633                                  */
4634                                 if (sq->end_added == 0) {
4635                                         /* Held for PD-API clear that. */
4636                                         sq->pdapi_aborted = 1;
4637                                         sq->held_length = 0;
4638                                         if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4639                                                 /*
4640                                                  * Need to add a PD-API
4641                                                  * aborted indication.
4642                                                  * Setting the control_pdapi
4643                                                  * assures that it will be
4644                                                  * added right after this
4645                                                  * msg.
4646                                                  */
4647                                                 uint32_t strseq;
4648
4649                                                 stcb->asoc.control_pdapi = sq;
4650                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4651                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4652                                                     stcb,
4653                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4654                                                     (void *)&strseq,
4655                                                     SCTP_SO_LOCKED);
4656                                                 stcb->asoc.control_pdapi = NULL;
4657                                         }
4658                                 }
4659                                 /* Add an end to wake them */
4660                                 sq->end_added = 1;
4661                         }
4662                 }
4663                 SCTP_INP_READ_UNLOCK(inp);
4664                 if (stcb->block_entry) {
4665                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4666                         stcb->block_entry->error = ECONNRESET;
4667                         stcb->block_entry = NULL;
4668                 }
4669         }
4670         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4671                 /*
4672                  * Someone holds a reference OR the socket is unaccepted
4673                  * yet.
4674                  */
4675                 if ((stcb->asoc.refcnt) ||
4676                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4677                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4678                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4679                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4680                 }
4681                 SCTP_TCB_UNLOCK(stcb);
4682                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4683                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4684                         /* nothing around */
4685                         so = NULL;
4686                 if (so) {
4687                         /* Wake any reader/writers */
4688                         sctp_sorwakeup(inp, so);
4689                         sctp_sowwakeup(inp, so);
4690                 }
4691 #ifdef SCTP_LOG_CLOSING
4692                 sctp_log_closing(inp, stcb, 9);
4693 #endif
4694                 /* no asoc destroyed */
4695                 return (0);
4696         }
4697 #ifdef SCTP_LOG_CLOSING
4698         sctp_log_closing(inp, stcb, 10);
4699 #endif
4700         /*
4701          * When I reach here, no others want to kill the assoc yet.. and I
4702          * own the lock. Now its possible an abort comes in when I do the
4703          * lock exchange below to grab all the locks to do the final take
4704          * out. to prevent this we increment the count, which will start a
4705          * timer and blow out above thus assuring us that we hold exclusive
4706          * killing of the asoc. Note that after getting back the TCB lock we
4707          * will go ahead and increment the counter back up and stop any
4708          * timer a passing stranger may have started :-S
4709          */
4710         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4711                 atomic_add_int(&stcb->asoc.refcnt, 1);
4712
4713                 SCTP_TCB_UNLOCK(stcb);
4714                 SCTP_INP_INFO_WLOCK();
4715                 SCTP_INP_WLOCK(inp);
4716                 SCTP_TCB_LOCK(stcb);
4717         }
4718         /* Double check the GONE flag */
4719         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4720             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4721                 /* nothing around */
4722                 so = NULL;
4723
4724         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4725             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4726                 /*
4727                  * For TCP type we need special handling when we are
4728                  * connected. We also include the peel'ed off ones to.
4729                  */
4730                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4731                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4732                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4733                         if (so) {
4734                                 SOCK_LOCK(so);
4735                                 if (so->so_rcv.sb_cc == 0) {
4736                                         so->so_state &= ~(SS_ISCONNECTING |
4737                                             SS_ISDISCONNECTING |
4738                                             SS_ISCONFIRMING |
4739                                             SS_ISCONNECTED);
4740                                 }
4741                                 socantrcvmore_locked(so);
4742                                 sctp_sowwakeup(inp, so);
4743                                 sctp_sorwakeup(inp, so);
4744                                 SCTP_SOWAKEUP(so);
4745                         }
4746                 }
4747         }
4748         /*
4749          * Make it invalid too, that way if its about to run it will abort
4750          * and return.
4751          */
4752         /* re-increment the lock */
4753         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4754                 atomic_add_int(&stcb->asoc.refcnt, -1);
4755         }
4756         if (stcb->asoc.refcnt) {
4757                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4758                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4759                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4760                         SCTP_INP_INFO_WUNLOCK();
4761                         SCTP_INP_WUNLOCK(inp);
4762                 }
4763                 SCTP_TCB_UNLOCK(stcb);
4764                 return (0);
4765         }
4766         asoc->state = 0;
4767         if (inp->sctp_tcbhash) {
4768                 LIST_REMOVE(stcb, sctp_tcbhash);
4769         }
4770         if (stcb->asoc.in_asocid_hash) {
4771                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4772         }
4773         /* Now lets remove it from the list of ALL associations in the EP */
4774         LIST_REMOVE(stcb, sctp_tcblist);
4775         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4776                 SCTP_INP_INCR_REF(inp);
4777                 SCTP_INP_WUNLOCK(inp);
4778         }
4779         /* pull from vtag hash */
4780         LIST_REMOVE(stcb, sctp_asocs);
4781         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4782             inp->sctp_lport, stcb->rport);
4783
4784         /*
4785          * Now restop the timers to be sure this is paranoia at is finest!
4786          */
4787         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4788         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4789         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4790         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4791         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4792         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4793         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4794         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4795         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4796                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4797                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4798                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4799         }
4800
4801         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4802         /*
4803          * The chunk lists and such SHOULD be empty but we check them just
4804          * in case.
4805          */
4806         /* anything on the wheel needs to be removed */
4807         for (i = 0; i < asoc->streamoutcnt; i++) {
4808                 struct sctp_stream_out *outs;
4809
4810                 outs = &asoc->strmout[i];
4811                 /* now clean up any chunks here */
4812                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4813                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4814                         if (sp->data) {
4815                                 if (so) {
4816                                         /* Still an open socket - report */
4817                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4818                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
4819                                             (void *)sp, SCTP_SO_LOCKED);
4820                                 }
4821                                 if (sp->data) {
4822                                         sctp_m_freem(sp->data);
4823                                         sp->data = NULL;
4824                                         sp->tail_mbuf = NULL;
4825                                 }
4826                         }
4827                         if (sp->net) {
4828                                 sctp_free_remote_addr(sp->net);
4829                                 sp->net = NULL;
4830                         }
4831                         sctp_free_spbufspace(stcb, asoc, sp);
4832                         if (sp->holds_key_ref)
4833                                 sctp_auth_key_release(stcb, sp->auth_keyid);
4834                         /* Free the zone stuff  */
4835                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4836                         SCTP_DECR_STRMOQ_COUNT();
4837                         /* sa_ignore FREED_MEMORY */
4838                 }
4839         }
4840         /* sa_ignore FREED_MEMORY */
4841         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4842                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4843                 SCTP_FREE(strrst, SCTP_M_STRESET);
4844         }
4845         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4846                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4847                 if (sq->data) {
4848                         sctp_m_freem(sq->data);
4849                         sq->data = NULL;
4850                 }
4851                 sctp_free_remote_addr(sq->whoFrom);
4852                 sq->whoFrom = NULL;
4853                 sq->stcb = NULL;
4854                 /* Free the ctl entry */
4855                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4856                 SCTP_DECR_READQ_COUNT();
4857                 /* sa_ignore FREED_MEMORY */
4858         }
4859         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4860                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4861                 if (chk->data) {
4862                         sctp_m_freem(chk->data);
4863                         chk->data = NULL;
4864                 }
4865                 if (chk->holds_key_ref)
4866                         sctp_auth_key_release(stcb, chk->auth_keyid);
4867                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4868                 SCTP_DECR_CHK_COUNT();
4869                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4870                 asoc->free_chunk_cnt--;
4871                 /* sa_ignore FREED_MEMORY */
4872         }
4873         /* pending send queue SHOULD be empty */
4874         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4875                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4876                 if (chk->data) {
4877                         if (so) {
4878                                 /* Still a socket? */
4879                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4880                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
4881                         }
4882                         if (chk->data) {
4883                                 sctp_m_freem(chk->data);
4884                                 chk->data = NULL;
4885                         }
4886                 }
4887                 if (chk->holds_key_ref)
4888                         sctp_auth_key_release(stcb, chk->auth_keyid);
4889                 if (chk->whoTo) {
4890                         sctp_free_remote_addr(chk->whoTo);
4891                         chk->whoTo = NULL;
4892                 }
4893                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4894                 SCTP_DECR_CHK_COUNT();
4895                 /* sa_ignore FREED_MEMORY */
4896         }
4897         /* sent queue SHOULD be empty */
4898         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
4899                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
4900                 if (chk->data) {
4901                         if (so) {
4902                                 /* Still a socket? */
4903                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
4904                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
4905                         }
4906                         if (chk->data) {
4907                                 sctp_m_freem(chk->data);
4908                                 chk->data = NULL;
4909                         }
4910                 }
4911                 if (chk->holds_key_ref)
4912                         sctp_auth_key_release(stcb, chk->auth_keyid);
4913                 sctp_free_remote_addr(chk->whoTo);
4914                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4915                 SCTP_DECR_CHK_COUNT();
4916                 /* sa_ignore FREED_MEMORY */
4917         }
4918         /* control queue MAY not be empty */
4919         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
4920                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
4921                 if (chk->data) {
4922                         sctp_m_freem(chk->data);
4923                         chk->data = NULL;
4924                 }
4925                 if (chk->holds_key_ref)
4926                         sctp_auth_key_release(stcb, chk->auth_keyid);
4927                 sctp_free_remote_addr(chk->whoTo);
4928                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4929                 SCTP_DECR_CHK_COUNT();
4930                 /* sa_ignore FREED_MEMORY */
4931         }
4932         /* ASCONF queue MAY not be empty */
4933         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
4934                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
4935                 if (chk->data) {
4936                         sctp_m_freem(chk->data);
4937                         chk->data = NULL;
4938                 }
4939                 if (chk->holds_key_ref)
4940                         sctp_auth_key_release(stcb, chk->auth_keyid);
4941                 sctp_free_remote_addr(chk->whoTo);
4942                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4943                 SCTP_DECR_CHK_COUNT();
4944                 /* sa_ignore FREED_MEMORY */
4945         }
4946         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
4947                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
4948                 if (chk->data) {
4949                         sctp_m_freem(chk->data);
4950                         chk->data = NULL;
4951                 }
4952                 if (chk->holds_key_ref)
4953                         sctp_auth_key_release(stcb, chk->auth_keyid);
4954                 sctp_free_remote_addr(chk->whoTo);
4955                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4956                 SCTP_DECR_CHK_COUNT();
4957                 /* sa_ignore FREED_MEMORY */
4958         }
4959
4960         if (asoc->mapping_array) {
4961                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4962                 asoc->mapping_array = NULL;
4963         }
4964         if (asoc->nr_mapping_array) {
4965                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4966                 asoc->nr_mapping_array = NULL;
4967         }
4968         /* the stream outs */
4969         if (asoc->strmout) {
4970                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4971                 asoc->strmout = NULL;
4972         }
4973         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
4974         if (asoc->strmin) {
4975                 struct sctp_queued_to_read *ctl, *nctl;
4976
4977                 for (i = 0; i < asoc->streamincnt; i++) {
4978                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
4979                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
4980                                 sctp_free_remote_addr(ctl->whoFrom);
4981                                 if (ctl->data) {
4982                                         sctp_m_freem(ctl->data);
4983                                         ctl->data = NULL;
4984                                 }
4985                                 /*
4986                                  * We don't free the address here since all
4987                                  * the net's were freed above.
4988                                  */
4989                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
4990                                 SCTP_DECR_READQ_COUNT();
4991                         }
4992                 }
4993                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
4994                 asoc->strmin = NULL;
4995         }
4996         asoc->streamincnt = 0;
4997         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4998 #ifdef INVARIANTS
4999                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5000                         panic("no net's left alloc'ed, or list points to itself");
5001                 }
5002 #endif
5003                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5004                 sctp_free_remote_addr(net);
5005         }
5006         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5007                 /* sa_ignore FREED_MEMORY */
5008                 sctp_remove_laddr(laddr);
5009         }
5010
5011         /* pending asconf (address) parameters */
5012         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5013                 /* sa_ignore FREED_MEMORY */
5014                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5015                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5016         }
5017         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5018                 /* sa_ignore FREED_MEMORY */
5019                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5020                 if (aack->data != NULL) {
5021                         sctp_m_freem(aack->data);
5022                 }
5023                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5024         }
5025         /* clean up auth stuff */
5026         if (asoc->local_hmacs)
5027                 sctp_free_hmaclist(asoc->local_hmacs);
5028         if (asoc->peer_hmacs)
5029                 sctp_free_hmaclist(asoc->peer_hmacs);
5030
5031         if (asoc->local_auth_chunks)
5032                 sctp_free_chunklist(asoc->local_auth_chunks);
5033         if (asoc->peer_auth_chunks)
5034                 sctp_free_chunklist(asoc->peer_auth_chunks);
5035
5036         sctp_free_authinfo(&asoc->authinfo);
5037
5038         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5039                 LIST_REMOVE(shared_key, next);
5040                 sctp_free_sharedkey(shared_key);
5041                 /* sa_ignore FREED_MEMORY */
5042         }
5043
5044         /* Insert new items here :> */
5045
5046         /* Get rid of LOCK */
5047         SCTP_TCB_LOCK_DESTROY(stcb);
5048         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5049         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5050                 SCTP_INP_INFO_WUNLOCK();
5051                 SCTP_INP_RLOCK(inp);
5052         }
5053 #ifdef SCTP_TRACK_FREED_ASOCS
5054         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5055                 /* now clean up the tasoc itself */
5056                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5057                 SCTP_DECR_ASOC_COUNT();
5058         } else {
5059                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5060         }
5061 #else
5062         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5063         SCTP_DECR_ASOC_COUNT();
5064 #endif
5065         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5066                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5067                         /*
5068                          * If its NOT the inp_free calling us AND sctp_close
5069                          * as been called, we call back...
5070                          */
5071                         SCTP_INP_RUNLOCK(inp);
5072                         /*
5073                          * This will start the kill timer (if we are the
5074                          * last one) since we hold an increment yet. But
5075                          * this is the only safe way to do this since
5076                          * otherwise if the socket closes at the same time
5077                          * we are here we might collide in the cleanup.
5078                          */
5079                         sctp_inpcb_free(inp,
5080                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5081                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5082                         SCTP_INP_DECR_REF(inp);
5083                         goto out_of;
5084                 } else {
5085                         /* The socket is still open. */
5086                         SCTP_INP_DECR_REF(inp);
5087                 }
5088         }
5089         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5090                 SCTP_INP_RUNLOCK(inp);
5091         }
5092 out_of:
5093         /* destroyed the asoc */
5094 #ifdef SCTP_LOG_CLOSING
5095         sctp_log_closing(inp, NULL, 11);
5096 #endif
5097         return (1);
5098 }
5099
5100
5101
5102 /*
5103  * determine if a destination is "reachable" based upon the addresses bound
5104  * to the current endpoint (e.g. only v4 or v6 currently bound)
5105  */
5106 /*
5107  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5108  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5109  * types bound as its endpoint
5110  */
5111 int
5112 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5113 {
5114         struct sctp_inpcb *inp;
5115         int answer;
5116
5117         /*
5118          * No locks here, the TCB, in all cases is already locked and an
5119          * assoc is up. There is either a INP lock by the caller applied (in
5120          * asconf case when deleting an address) or NOT in the HB case,
5121          * however if HB then the INP increment is up and the INP will not
5122          * be removed (on top of the fact that we have a TCB lock). So we
5123          * only want to read the sctp_flags, which is either bound-all or
5124          * not.. no protection needed since once an assoc is up you can't be
5125          * changing your binding.
5126          */
5127         inp = stcb->sctp_ep;
5128         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5129                 /* if bound all, destination is not restricted */
5130                 /*
5131                  * RRS: Question during lock work: Is this correct? If you
5132                  * are bound-all you still might need to obey the V4--V6
5133                  * flags??? IMO this bound-all stuff needs to be removed!
5134                  */
5135                 return (1);
5136         }
5137         /* NOTE: all "scope" checks are done when local addresses are added */
5138         if (destaddr->sa_family == AF_INET6) {
5139                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5140         } else if (destaddr->sa_family == AF_INET) {
5141                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5142         } else {
5143                 /* invalid family, so it's unreachable */
5144                 answer = 0;
5145         }
5146         return (answer);
5147 }
5148
5149 /*
5150  * update the inp_vflags on an endpoint
5151  */
5152 static void
5153 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5154 {
5155         struct sctp_laddr *laddr;
5156
5157         /* first clear the flag */
5158         inp->ip_inp.inp.inp_vflag = 0;
5159         /* set the flag based on addresses on the ep list */
5160         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5161                 if (laddr->ifa == NULL) {
5162                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5163                             __FUNCTION__);
5164                         continue;
5165                 }
5166                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5167                         continue;
5168                 }
5169                 if (laddr->ifa->address.sa.sa_family == AF_INET6) {
5170                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5171                 } else if (laddr->ifa->address.sa.sa_family == AF_INET) {
5172                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5173                 }
5174         }
5175 }
5176
5177 /*
5178  * Add the address to the endpoint local address list There is nothing to be
5179  * done if we are bound to all addresses
5180  */
5181 void
5182 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5183 {
5184         struct sctp_laddr *laddr;
5185         int fnd, error = 0;
5186
5187         fnd = 0;
5188
5189         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5190                 /* You are already bound to all. You have it already */
5191                 return;
5192         }
5193         if (ifa->address.sa.sa_family == AF_INET6) {
5194                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5195                         /* Can't bind a non-useable addr. */
5196                         return;
5197                 }
5198         }
5199         /* first, is it already present? */
5200         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5201                 if (laddr->ifa == ifa) {
5202                         fnd = 1;
5203                         break;
5204                 }
5205         }
5206
5207         if (fnd == 0) {
5208                 /* Not in the ep list */
5209                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5210                 if (error != 0)
5211                         return;
5212                 inp->laddr_count++;
5213                 /* update inp_vflag flags */
5214                 if (ifa->address.sa.sa_family == AF_INET6) {
5215                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5216                 } else if (ifa->address.sa.sa_family == AF_INET) {
5217                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5218                 }
5219         }
5220         return;
5221 }
5222
5223
5224 /*
5225  * select a new (hopefully reachable) destination net (should only be used
5226  * when we deleted an ep addr that is the only usable source address to reach
5227  * the destination net)
5228  */
5229 static void
5230 sctp_select_primary_destination(struct sctp_tcb *stcb)
5231 {
5232         struct sctp_nets *net;
5233
5234         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5235                 /* for now, we'll just pick the first reachable one we find */
5236                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5237                         continue;
5238                 if (sctp_destination_is_reachable(stcb,
5239                     (struct sockaddr *)&net->ro._l_addr)) {
5240                         /* found a reachable destination */
5241                         stcb->asoc.primary_destination = net;
5242                 }
5243         }
5244         /* I can't there from here! ...we're gonna die shortly... */
5245 }
5246
5247
5248 /*
5249  * Delete the address from the endpoint local address list There is nothing
5250  * to be done if we are bound to all addresses
5251  */
5252 void
5253 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5254 {
5255         struct sctp_laddr *laddr;
5256         int fnd;
5257
5258         fnd = 0;
5259         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5260                 /* You are already bound to all. You have it already */
5261                 return;
5262         }
5263         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5264                 if (laddr->ifa == ifa) {
5265                         fnd = 1;
5266                         break;
5267                 }
5268         }
5269         if (fnd && (inp->laddr_count < 2)) {
5270                 /* can't delete unless there are at LEAST 2 addresses */
5271                 return;
5272         }
5273         if (fnd) {
5274                 /*
5275                  * clean up any use of this address go through our
5276                  * associations and clear any last_used_address that match
5277                  * this one for each assoc, see if a new primary_destination
5278                  * is needed
5279                  */
5280                 struct sctp_tcb *stcb;
5281
5282                 /* clean up "next_addr_touse" */
5283                 if (inp->next_addr_touse == laddr)
5284                         /* delete this address */
5285                         inp->next_addr_touse = NULL;
5286
5287                 /* clean up "last_used_address" */
5288                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5289                         struct sctp_nets *net;
5290
5291                         SCTP_TCB_LOCK(stcb);
5292                         if (stcb->asoc.last_used_address == laddr)
5293                                 /* delete this address */
5294                                 stcb->asoc.last_used_address = NULL;
5295                         /*
5296                          * Now spin through all the nets and purge any ref
5297                          * to laddr
5298                          */
5299                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5300                                 if (net->ro._s_addr &&
5301                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5302                                         /* Yep, purge src address selected */
5303                                         sctp_rtentry_t *rt;
5304
5305                                         /* delete this address if cached */
5306                                         rt = net->ro.ro_rt;
5307                                         if (rt != NULL) {
5308                                                 RTFREE(rt);
5309                                                 net->ro.ro_rt = NULL;
5310                                         }
5311                                         sctp_free_ifa(net->ro._s_addr);
5312                                         net->ro._s_addr = NULL;
5313                                         net->src_addr_selected = 0;
5314                                 }
5315                         }
5316                         SCTP_TCB_UNLOCK(stcb);
5317                 }               /* for each tcb */
5318                 /* remove it from the ep list */
5319                 sctp_remove_laddr(laddr);
5320                 inp->laddr_count--;
5321                 /* update inp_vflag flags */
5322                 sctp_update_ep_vflag(inp);
5323         }
5324         return;
5325 }
5326
5327 /*
5328  * Add the address to the TCB local address restricted list.
5329  * This is a "pending" address list (eg. addresses waiting for an
5330  * ASCONF-ACK response) and cannot be used as a valid source address.
5331  */
5332 void
5333 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5334 {
5335         struct sctp_inpcb *inp;
5336         struct sctp_laddr *laddr;
5337         struct sctpladdr *list;
5338
5339         /*
5340          * Assumes TCB is locked.. and possibly the INP. May need to
5341          * confirm/fix that if we need it and is not the case.
5342          */
5343         list = &stcb->asoc.sctp_restricted_addrs;
5344
5345         inp = stcb->sctp_ep;
5346         if (ifa->address.sa.sa_family == AF_INET6) {
5347                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5348                         /* Can't bind a non-existent addr. */
5349                         return;
5350                 }
5351         }
5352         /* does the address already exist? */
5353         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5354                 if (laddr->ifa == ifa) {
5355                         return;
5356                 }
5357         }
5358
5359         /* add to the list */
5360         (void)sctp_insert_laddr(list, ifa, 0);
5361         return;
5362 }
5363
5364 /*
5365  * insert an laddr entry with the given ifa for the desired list
5366  */
5367 int
5368 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5369 {
5370         struct sctp_laddr *laddr;
5371
5372         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5373         if (laddr == NULL) {
5374                 /* out of memory? */
5375                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5376                 return (EINVAL);
5377         }
5378         SCTP_INCR_LADDR_COUNT();
5379         bzero(laddr, sizeof(*laddr));
5380         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5381         laddr->ifa = ifa;
5382         laddr->action = act;
5383         atomic_add_int(&ifa->refcount, 1);
5384         /* insert it */
5385         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5386
5387         return (0);
5388 }
5389
5390 /*
5391  * Remove an laddr entry from the local address list (on an assoc)
5392  */
5393 void
5394 sctp_remove_laddr(struct sctp_laddr *laddr)
5395 {
5396
5397         /* remove from the list */
5398         LIST_REMOVE(laddr, sctp_nxt_addr);
5399         sctp_free_ifa(laddr->ifa);
5400         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5401         SCTP_DECR_LADDR_COUNT();
5402 }
5403
5404 /*
5405  * Remove a local address from the TCB local address restricted list
5406  */
5407 void
5408 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5409 {
5410         struct sctp_inpcb *inp;
5411         struct sctp_laddr *laddr;
5412
5413         /*
5414          * This is called by asconf work. It is assumed that a) The TCB is
5415          * locked and b) The INP is locked. This is true in as much as I can
5416          * trace through the entry asconf code where I did these locks.
5417          * Again, the ASCONF code is a bit different in that it does lock
5418          * the INP during its work often times. This must be since we don't
5419          * want other proc's looking up things while what they are looking
5420          * up is changing :-D
5421          */
5422
5423         inp = stcb->sctp_ep;
5424         /* if subset bound and don't allow ASCONF's, can't delete last */
5425         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5426             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5427                 if (stcb->sctp_ep->laddr_count < 2) {
5428                         /* can't delete last address */
5429                         return;
5430                 }
5431         }
5432         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5433                 /* remove the address if it exists */
5434                 if (laddr->ifa == NULL)
5435                         continue;
5436                 if (laddr->ifa == ifa) {
5437                         sctp_remove_laddr(laddr);
5438                         return;
5439                 }
5440         }
5441
5442         /* address not found! */
5443         return;
5444 }
5445
5446 /*
5447  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5448  */
5449 /* sysctl */
5450 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5451 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5452
5453
5454
5455 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5456 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5457 int *sctp_cpuarry = NULL;
5458 void
5459 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5460 {
5461         /* Queue a packet to a processor for the specified core */
5462         struct sctp_mcore_queue *qent;
5463         struct sctp_mcore_ctrl *wkq;
5464         int need_wake = 0;
5465
5466         if (sctp_mcore_workers == NULL) {
5467                 /* Something went way bad during setup */
5468                 sctp_input_with_port(m, off, 0);
5469                 return;
5470         }
5471         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5472             (sizeof(struct sctp_mcore_queue)),
5473             SCTP_M_MCORE);
5474         if (qent == NULL) {
5475                 /* This is trouble  */
5476                 sctp_input_with_port(m, off, 0);
5477                 return;
5478         }
5479         qent->vn = curvnet;
5480         qent->m = m;
5481         qent->off = off;
5482         qent->v6 = 0;
5483         wkq = &sctp_mcore_workers[cpu_to_use];
5484         SCTP_MCORE_QLOCK(wkq);
5485
5486         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5487         if (wkq->running == 0) {
5488                 need_wake = 1;
5489         }
5490         SCTP_MCORE_QUNLOCK(wkq);
5491         if (need_wake) {
5492                 wakeup(&wkq->running);
5493         }
5494 }
5495
5496 static void
5497 sctp_mcore_thread(void *arg)
5498 {
5499
5500         struct sctp_mcore_ctrl *wkq;
5501         struct sctp_mcore_queue *qent;
5502
5503         wkq = (struct sctp_mcore_ctrl *)arg;
5504         struct mbuf *m;
5505         int off, v6;
5506
5507         /* Wait for first tickle */
5508         SCTP_MCORE_LOCK(wkq);
5509         wkq->running = 0;
5510         msleep(&wkq->running,
5511             &wkq->core_mtx,
5512             0, "wait for pkt", 0);
5513         SCTP_MCORE_UNLOCK(wkq);
5514
5515         /* Bind to our cpu */
5516         thread_lock(curthread);
5517         sched_bind(curthread, wkq->cpuid);
5518         thread_unlock(curthread);
5519
5520         /* Now lets start working */
5521         SCTP_MCORE_LOCK(wkq);
5522         /* Now grab lock and go */
5523         while (1) {
5524                 SCTP_MCORE_QLOCK(wkq);
5525 skip_sleep:
5526                 wkq->running = 1;
5527                 qent = TAILQ_FIRST(&wkq->que);
5528                 if (qent) {
5529                         TAILQ_REMOVE(&wkq->que, qent, next);
5530                         SCTP_MCORE_QUNLOCK(wkq);
5531                         CURVNET_SET(qent->vn);
5532                         m = qent->m;
5533                         off = qent->off;
5534                         v6 = qent->v6;
5535                         SCTP_FREE(qent, SCTP_M_MCORE);
5536                         if (v6 == 0) {
5537                                 sctp_input_with_port(m, off, 0);
5538                         } else {
5539                                 printf("V6 not yet supported\n");
5540                                 sctp_m_freem(m);
5541                         }
5542                         CURVNET_RESTORE();
5543                         SCTP_MCORE_QLOCK(wkq);
5544                 }
5545                 wkq->running = 0;
5546                 if (!TAILQ_EMPTY(&wkq->que)) {
5547                         goto skip_sleep;
5548                 }
5549                 SCTP_MCORE_QUNLOCK(wkq);
5550                 msleep(&wkq->running,
5551                     &wkq->core_mtx,
5552                     0, "wait for pkt", 0);
5553         };
5554 }
5555
5556 static void
5557 sctp_startup_mcore_threads(void)
5558 {
5559         int i, cpu;
5560
5561         if (mp_ncpus == 1)
5562                 return;
5563
5564         if (sctp_mcore_workers != NULL) {
5565                 /*
5566                  * Already been here in some previous vnet?
5567                  */
5568                 return;
5569         }
5570         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5571             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5572             SCTP_M_MCORE);
5573         if (sctp_mcore_workers == NULL) {
5574                 /* TSNH I hope */
5575                 return;
5576         }
5577         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5578             sizeof(struct sctp_mcore_ctrl)));
5579         /* Init the structures */
5580         for (i = 0; i <= mp_maxid; i++) {
5581                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5582                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5583                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5584                 sctp_mcore_workers[i].cpuid = i;
5585         }
5586         if (sctp_cpuarry == NULL) {
5587                 SCTP_MALLOC(sctp_cpuarry, int *,
5588                     (mp_ncpus * sizeof(int)),
5589                     SCTP_M_MCORE);
5590                 i = 0;
5591                 CPU_FOREACH(cpu) {
5592                         sctp_cpuarry[i] = cpu;
5593                         i++;
5594                 }
5595         }
5596         /* Now start them all */
5597         CPU_FOREACH(cpu) {
5598                 (void)kproc_create(sctp_mcore_thread,
5599                     (void *)&sctp_mcore_workers[cpu],
5600                     &sctp_mcore_workers[cpu].thread_proc,
5601                     RFPROC,
5602                     SCTP_KTHREAD_PAGES,
5603                     SCTP_MCORE_NAME);
5604
5605         }
5606 }
5607
5608 #endif
5609
5610 void
5611 sctp_pcb_init()
5612 {
5613         /*
5614          * SCTP initialization for the PCB structures should be called by
5615          * the sctp_init() funciton.
5616          */
5617         int i;
5618         struct timeval tv;
5619
5620         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5621                 /* error I was called twice */
5622                 return;
5623         }
5624         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5625
5626 #if defined(SCTP_LOCAL_TRACE_BUF)
5627         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5628 #endif
5629 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5630         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5631             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5632             SCTP_M_MCORE);
5633 #endif
5634         (void)SCTP_GETTIME_TIMEVAL(&tv);
5635 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5636         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5637         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5638         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5639 #else
5640         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5641         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5642         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5643 #endif
5644         /* init the empty list of (All) Endpoints */
5645         LIST_INIT(&SCTP_BASE_INFO(listhead));
5646
5647
5648         /* init the hash table of endpoints */
5649         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5650         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5651         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5652         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5653             &SCTP_BASE_INFO(hashasocmark));
5654         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5655             &SCTP_BASE_INFO(hashmark));
5656         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5657             &SCTP_BASE_INFO(hashtcpmark));
5658         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5659
5660
5661         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5662             &SCTP_BASE_INFO(hashvrfmark));
5663
5664         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5665             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5666         /* init the zones */
5667         /*
5668          * FIX ME: Should check for NULL returns, but if it does fail we are
5669          * doomed to panic anyways... add later maybe.
5670          */
5671         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5672             sizeof(struct sctp_inpcb), maxsockets);
5673
5674         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5675             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5676
5677         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5678             sizeof(struct sctp_laddr),
5679             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5680
5681         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5682             sizeof(struct sctp_nets),
5683             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5684
5685         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5686             sizeof(struct sctp_tmit_chunk),
5687             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5688
5689         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5690             sizeof(struct sctp_queued_to_read),
5691             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5692
5693         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5694             sizeof(struct sctp_stream_queue_pending),
5695             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5696
5697         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5698             sizeof(struct sctp_asconf),
5699             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5700
5701         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5702             sizeof(struct sctp_asconf_ack),
5703             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5704
5705
5706         /* Master Lock INIT for info structure */
5707         SCTP_INP_INFO_LOCK_INIT();
5708         SCTP_STATLOG_INIT_LOCK();
5709
5710         SCTP_IPI_COUNT_INIT();
5711         SCTP_IPI_ADDR_INIT();
5712 #ifdef SCTP_PACKET_LOGGING
5713         SCTP_IP_PKTLOG_INIT();
5714 #endif
5715         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5716
5717         SCTP_WQ_ADDR_INIT();
5718         /* not sure if we need all the counts */
5719         SCTP_BASE_INFO(ipi_count_ep) = 0;
5720         /* assoc/tcb zone info */
5721         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5722         /* local addrlist zone info */
5723         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5724         /* remote addrlist zone info */
5725         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5726         /* chunk info */
5727         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5728
5729         /* socket queue zone info */
5730         SCTP_BASE_INFO(ipi_count_readq) = 0;
5731
5732         /* stream out queue cont */
5733         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5734
5735         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5736         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5737
5738         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5739
5740         /* Init the TIMEWAIT list */
5741         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5742                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5743         }
5744
5745         sctp_startup_iterator();
5746
5747 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5748         sctp_startup_mcore_threads();
5749 #endif
5750
5751         /*
5752          * INIT the default VRF which for BSD is the only one, other O/S's
5753          * may have more. But initially they must start with one and then
5754          * add the VRF's as addresses are added.
5755          */
5756         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5757 }
5758
5759 /*
5760  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5761  */
5762 void
5763 sctp_pcb_finish(void)
5764 {
5765         struct sctp_vrflist *vrf_bucket;
5766         struct sctp_vrf *vrf, *nvrf;
5767         struct sctp_ifn *ifn, *nifn;
5768         struct sctp_ifa *ifa, *nifa;
5769         struct sctpvtaghead *chain;
5770         struct sctp_tagblock *twait_block, *prev_twait_block;
5771         struct sctp_laddr *wi, *nwi;
5772         int i;
5773
5774         /*
5775          * Free BSD the it thread never exits but we do clean up. The only
5776          * way freebsd reaches here if we have VRF's but we still add the
5777          * ifdef to make it compile on old versions.
5778          */
5779         {
5780                 struct sctp_iterator *it, *nit;
5781
5782                 SCTP_IPI_ITERATOR_WQ_LOCK();
5783                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5784                         if (it->vn != curvnet) {
5785                                 continue;
5786                         }
5787                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5788                         if (it->function_atend != NULL) {
5789                                 (*it->function_atend) (it->pointer, it->val);
5790                         }
5791                         SCTP_FREE(it, SCTP_M_ITER);
5792                 }
5793                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5794                 SCTP_ITERATOR_LOCK();
5795                 if ((sctp_it_ctl.cur_it) &&
5796                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5797                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5798                 }
5799                 SCTP_ITERATOR_UNLOCK();
5800         }
5801
5802         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5803         SCTP_WQ_ADDR_LOCK();
5804         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5805                 LIST_REMOVE(wi, sctp_nxt_addr);
5806                 SCTP_DECR_LADDR_COUNT();
5807                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5808         }
5809         SCTP_WQ_ADDR_UNLOCK();
5810
5811         /*
5812          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5813          * destroyed first).
5814          */
5815         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5816         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5817                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5818                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5819                                 /* free the ifa */
5820                                 LIST_REMOVE(ifa, next_bucket);
5821                                 LIST_REMOVE(ifa, next_ifa);
5822                                 SCTP_FREE(ifa, SCTP_M_IFA);
5823                         }
5824                         /* free the ifn */
5825                         LIST_REMOVE(ifn, next_bucket);
5826                         LIST_REMOVE(ifn, next_ifn);
5827                         SCTP_FREE(ifn, SCTP_M_IFN);
5828                 }
5829                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5830                 /* free the vrf */
5831                 LIST_REMOVE(vrf, next_vrf);
5832                 SCTP_FREE(vrf, SCTP_M_VRF);
5833         }
5834         /* free the vrf hashes */
5835         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5836         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5837
5838         /*
5839          * free the TIMEWAIT list elements malloc'd in the function
5840          * sctp_add_vtag_to_timewait()...
5841          */
5842         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5843                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5844                 if (!LIST_EMPTY(chain)) {
5845                         prev_twait_block = NULL;
5846                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
5847                                 if (prev_twait_block) {
5848                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5849                                 }
5850                                 prev_twait_block = twait_block;
5851                         }
5852                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
5853                 }
5854         }
5855
5856         /* free the locks and mutexes */
5857 #ifdef SCTP_PACKET_LOGGING
5858         SCTP_IP_PKTLOG_DESTROY();
5859 #endif
5860         SCTP_IPI_ADDR_DESTROY();
5861         SCTP_STATLOG_DESTROY();
5862         SCTP_INP_INFO_LOCK_DESTROY();
5863
5864         SCTP_WQ_ADDR_DESTROY();
5865
5866         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
5867         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
5868         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
5869         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
5870         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
5871         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
5872         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
5873         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
5874         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
5875         /* Get rid of other stuff to */
5876         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
5877                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
5878         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
5879                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
5880         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
5881                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
5882 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5883         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
5884 #endif
5885 }
5886
5887
5888 int
5889 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
5890     int iphlen, int offset, int limit, struct sctphdr *sh,
5891     struct sockaddr *altsa)
5892 {
5893         /*
5894          * grub through the INIT pulling addresses and loading them to the
5895          * nets structure in the asoc. The from address in the mbuf should
5896          * also be loaded (if it is not already). This routine can be called
5897          * with either INIT or INIT-ACK's as long as the m points to the IP
5898          * packet and the offset points to the beginning of the parameters.
5899          */
5900         struct sctp_inpcb *inp, *l_inp;
5901         struct sctp_nets *net, *nnet, *net_tmp;
5902         struct ip *iph;
5903         struct sctp_paramhdr *phdr, parm_buf;
5904         struct sctp_tcb *stcb_tmp;
5905         uint16_t ptype, plen;
5906         struct sockaddr *sa;
5907         struct sockaddr_storage dest_store;
5908         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
5909         struct sockaddr_in sin;
5910         struct sockaddr_in6 sin6;
5911         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
5912         struct sctp_auth_random *p_random = NULL;
5913         uint16_t random_len = 0;
5914         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
5915         struct sctp_auth_hmac_algo *hmacs = NULL;
5916         uint16_t hmacs_len = 0;
5917         uint8_t saw_asconf = 0;
5918         uint8_t saw_asconf_ack = 0;
5919         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
5920         struct sctp_auth_chunk_list *chunks = NULL;
5921         uint16_t num_chunks = 0;
5922         sctp_key_t *new_key;
5923         uint32_t keylen;
5924         int got_random = 0, got_hmacs = 0, got_chklist = 0;
5925         uint8_t ecn_allowed;
5926
5927         /* First get the destination address setup too. */
5928         memset(&sin, 0, sizeof(sin));
5929         memset(&sin6, 0, sizeof(sin6));
5930
5931         sin.sin_family = AF_INET;
5932         sin.sin_len = sizeof(sin);
5933         sin.sin_port = stcb->rport;
5934
5935         sin6.sin6_family = AF_INET6;
5936         sin6.sin6_len = sizeof(struct sockaddr_in6);
5937         sin6.sin6_port = stcb->rport;
5938         if (altsa == NULL) {
5939                 iph = mtod(m, struct ip *);
5940                 switch (iph->ip_v) {
5941                 case IPVERSION:
5942                         {
5943                                 /* its IPv4 */
5944                                 struct sockaddr_in *sin_2;
5945
5946                                 sin_2 = (struct sockaddr_in *)(local_sa);
5947                                 memset(sin_2, 0, sizeof(sin));
5948                                 sin_2->sin_family = AF_INET;
5949                                 sin_2->sin_len = sizeof(sin);
5950                                 sin_2->sin_port = sh->dest_port;
5951                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
5952                                 sin.sin_addr = iph->ip_src;
5953                                 sa = (struct sockaddr *)&sin;
5954                                 break;
5955                         }
5956 #ifdef INET6
5957                 case IPV6_VERSION >> 4:
5958                         {
5959                                 /* its IPv6 */
5960                                 struct ip6_hdr *ip6;
5961                                 struct sockaddr_in6 *sin6_2;
5962
5963                                 ip6 = mtod(m, struct ip6_hdr *);
5964                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
5965                                 memset(sin6_2, 0, sizeof(sin6));
5966                                 sin6_2->sin6_family = AF_INET6;
5967                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
5968                                 sin6_2->sin6_port = sh->dest_port;
5969                                 sin6.sin6_addr = ip6->ip6_src;
5970                                 sa = (struct sockaddr *)&sin6;
5971                                 break;
5972                         }
5973 #endif
5974                 default:
5975                         return (-1);
5976                         break;
5977                 }
5978         } else {
5979                 /*
5980                  * For cookies we use the src address NOT from the packet
5981                  * but from the original INIT
5982                  */
5983                 sa = altsa;
5984         }
5985         /* Turn off ECN until we get through all params */
5986         ecn_allowed = 0;
5987         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5988                 /* mark all addresses that we have currently on the list */
5989                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
5990         }
5991         /* does the source address already exist? if so skip it */
5992         l_inp = inp = stcb->sctp_ep;
5993
5994         atomic_add_int(&stcb->asoc.refcnt, 1);
5995         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
5996         atomic_add_int(&stcb->asoc.refcnt, -1);
5997
5998         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
5999                 /* we must add the source address */
6000                 /* no scope set here since we have a tcb already. */
6001                 if ((sa->sa_family == AF_INET) &&
6002                     (stcb->asoc.ipv4_addr_legal)) {
6003                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6004                                 return (-1);
6005                         }
6006                 } else if ((sa->sa_family == AF_INET6) &&
6007                     (stcb->asoc.ipv6_addr_legal)) {
6008                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6009                                 return (-2);
6010                         }
6011                 }
6012         } else {
6013                 if (net_tmp != NULL && stcb_tmp == stcb) {
6014                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6015                 } else if (stcb_tmp != stcb) {
6016                         /* It belongs to another association? */
6017                         if (stcb_tmp)
6018                                 SCTP_TCB_UNLOCK(stcb_tmp);
6019                         return (-3);
6020                 }
6021         }
6022         if (stcb->asoc.state == 0) {
6023                 /* the assoc was freed? */
6024                 return (-4);
6025         }
6026         /*
6027          * peer must explicitly turn this on. This may have been initialized
6028          * to be "on" in order to allow local addr changes while INIT's are
6029          * in flight.
6030          */
6031         stcb->asoc.peer_supports_asconf = 0;
6032         /* now we must go through each of the params. */
6033         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6034         while (phdr) {
6035                 ptype = ntohs(phdr->param_type);
6036                 plen = ntohs(phdr->param_length);
6037                 /*
6038                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
6039                  * (int)plen);
6040                  */
6041                 if (offset + plen > limit) {
6042                         break;
6043                 }
6044                 if (plen == 0) {
6045                         break;
6046                 }
6047                 if (ptype == SCTP_IPV4_ADDRESS) {
6048                         if (stcb->asoc.ipv4_addr_legal) {
6049                                 struct sctp_ipv4addr_param *p4, p4_buf;
6050
6051                                 /* ok get the v4 address and check/add */
6052                                 phdr = sctp_get_next_param(m, offset,
6053                                     (struct sctp_paramhdr *)&p4_buf,
6054                                     sizeof(p4_buf));
6055                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6056                                     phdr == NULL) {
6057                                         return (-5);
6058                                 }
6059                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6060                                 sin.sin_addr.s_addr = p4->addr;
6061                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6062                                         /* Skip multi-cast addresses */
6063                                         goto next_param;
6064                                 }
6065                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6066                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6067                                         goto next_param;
6068                                 }
6069                                 sa = (struct sockaddr *)&sin;
6070                                 inp = stcb->sctp_ep;
6071                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6072                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6073                                     local_sa, stcb);
6074                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6075
6076                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6077                                     inp == NULL) {
6078                                         /* we must add the source address */
6079                                         /*
6080                                          * no scope set since we have a tcb
6081                                          * already
6082                                          */
6083
6084                                         /*
6085                                          * we must validate the state again
6086                                          * here
6087                                          */
6088                         add_it_now:
6089                                         if (stcb->asoc.state == 0) {
6090                                                 /* the assoc was freed? */
6091                                                 return (-7);
6092                                         }
6093                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6094                                                 return (-8);
6095                                         }
6096                                 } else if (stcb_tmp == stcb) {
6097                                         if (stcb->asoc.state == 0) {
6098                                                 /* the assoc was freed? */
6099                                                 return (-10);
6100                                         }
6101                                         if (net != NULL) {
6102                                                 /* clear flag */
6103                                                 net->dest_state &=
6104                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6105                                         }
6106                                 } else {
6107                                         /*
6108                                          * strange, address is in another
6109                                          * assoc? straighten out locks.
6110                                          */
6111                                         if (stcb_tmp) {
6112                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6113                                                         /*
6114                                                          * in setup state we
6115                                                          * abort this guy
6116                                                          */
6117                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6118                                                             stcb_tmp, 1, NULL, 0);
6119                                                         goto add_it_now;
6120                                                 }
6121                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6122                                         }
6123                                         if (stcb->asoc.state == 0) {
6124                                                 /* the assoc was freed? */
6125                                                 return (-12);
6126                                         }
6127                                         return (-13);
6128                                 }
6129                         }
6130                 } else if (ptype == SCTP_IPV6_ADDRESS) {
6131                         if (stcb->asoc.ipv6_addr_legal) {
6132                                 /* ok get the v6 address and check/add */
6133                                 struct sctp_ipv6addr_param *p6, p6_buf;
6134
6135                                 phdr = sctp_get_next_param(m, offset,
6136                                     (struct sctp_paramhdr *)&p6_buf,
6137                                     sizeof(p6_buf));
6138                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6139                                     phdr == NULL) {
6140                                         return (-14);
6141                                 }
6142                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6143                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6144                                     sizeof(p6->addr));
6145                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6146                                         /* Skip multi-cast addresses */
6147                                         goto next_param;
6148                                 }
6149                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6150                                         /*
6151                                          * Link local make no sense without
6152                                          * scope
6153                                          */
6154                                         goto next_param;
6155                                 }
6156                                 sa = (struct sockaddr *)&sin6;
6157                                 inp = stcb->sctp_ep;
6158                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6159                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6160                                     local_sa, stcb);
6161                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6162                                 if (stcb_tmp == NULL &&
6163                                     (inp == stcb->sctp_ep || inp == NULL)) {
6164                                         /*
6165                                          * we must validate the state again
6166                                          * here
6167                                          */
6168                         add_it_now6:
6169                                         if (stcb->asoc.state == 0) {
6170                                                 /* the assoc was freed? */
6171                                                 return (-16);
6172                                         }
6173                                         /*
6174                                          * we must add the address, no scope
6175                                          * set
6176                                          */
6177                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6178                                                 return (-17);
6179                                         }
6180                                 } else if (stcb_tmp == stcb) {
6181                                         /*
6182                                          * we must validate the state again
6183                                          * here
6184                                          */
6185                                         if (stcb->asoc.state == 0) {
6186                                                 /* the assoc was freed? */
6187                                                 return (-19);
6188                                         }
6189                                         if (net != NULL) {
6190                                                 /* clear flag */
6191                                                 net->dest_state &=
6192                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6193                                         }
6194                                 } else {
6195                                         /*
6196                                          * strange, address is in another
6197                                          * assoc? straighten out locks.
6198                                          */
6199                                         if (stcb_tmp)
6200                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6201                                                         /*
6202                                                          * in setup state we
6203                                                          * abort this guy
6204                                                          */
6205                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6206                                                             stcb_tmp, 1, NULL, 0);
6207                                                         goto add_it_now6;
6208                                                 }
6209                                         SCTP_TCB_UNLOCK(stcb_tmp);
6210
6211                                         if (stcb->asoc.state == 0) {
6212                                                 /* the assoc was freed? */
6213                                                 return (-21);
6214                                         }
6215                                         return (-22);
6216                                 }
6217                         }
6218                 } else if (ptype == SCTP_ECN_CAPABLE) {
6219                         ecn_allowed = 1;
6220                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6221                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6222                                 struct sctp_adaptation_layer_indication ai,
6223                                                                 *aip;
6224
6225                                 phdr = sctp_get_next_param(m, offset,
6226                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6227                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6228                                 if (aip) {
6229                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6230                                         stcb->asoc.adaptation_needed = 1;
6231                                 }
6232                         }
6233                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6234                         struct sctp_asconf_addr_param lstore, *fee;
6235                         struct sctp_asconf_addrv4_param *fii;
6236                         int lptype;
6237                         struct sockaddr *lsa = NULL;
6238
6239                         stcb->asoc.peer_supports_asconf = 1;
6240                         if (plen > sizeof(lstore)) {
6241                                 return (-23);
6242                         }
6243                         phdr = sctp_get_next_param(m, offset,
6244                             (struct sctp_paramhdr *)&lstore,
6245                             min(plen, sizeof(lstore)));
6246                         if (phdr == NULL) {
6247                                 return (-24);
6248                         }
6249                         fee = (struct sctp_asconf_addr_param *)phdr;
6250                         lptype = ntohs(fee->addrp.ph.param_type);
6251                         if (lptype == SCTP_IPV4_ADDRESS) {
6252                                 if (plen !=
6253                                     sizeof(struct sctp_asconf_addrv4_param)) {
6254                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6255                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6256                                             plen);
6257                                 } else {
6258                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6259                                         sin.sin_addr.s_addr = fii->addrp.addr;
6260                                         lsa = (struct sockaddr *)&sin;
6261                                 }
6262                         } else if (lptype == SCTP_IPV6_ADDRESS) {
6263                                 if (plen !=
6264                                     sizeof(struct sctp_asconf_addr_param)) {
6265                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6266                                             (int)sizeof(struct sctp_asconf_addr_param),
6267                                             plen);
6268                                 } else {
6269                                         memcpy(sin6.sin6_addr.s6_addr,
6270                                             fee->addrp.addr,
6271                                             sizeof(fee->addrp.addr));
6272                                         lsa = (struct sockaddr *)&sin6;
6273                                 }
6274                         }
6275                         if (lsa) {
6276                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6277                         }
6278                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6279                         stcb->asoc.peer_supports_nat = 1;
6280                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6281                         /* Peer supports pr-sctp */
6282                         stcb->asoc.peer_supports_prsctp = 1;
6283                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6284                         /* A supported extension chunk */
6285                         struct sctp_supported_chunk_types_param *pr_supported;
6286                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6287                         int num_ent, i;
6288
6289                         phdr = sctp_get_next_param(m, offset,
6290                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6291                         if (phdr == NULL) {
6292                                 return (-25);
6293                         }
6294                         stcb->asoc.peer_supports_asconf = 0;
6295                         stcb->asoc.peer_supports_prsctp = 0;
6296                         stcb->asoc.peer_supports_pktdrop = 0;
6297                         stcb->asoc.peer_supports_strreset = 0;
6298                         stcb->asoc.peer_supports_nr_sack = 0;
6299                         stcb->asoc.peer_supports_auth = 0;
6300                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6301                         num_ent = plen - sizeof(struct sctp_paramhdr);
6302                         for (i = 0; i < num_ent; i++) {
6303                                 switch (pr_supported->chunk_types[i]) {
6304                                 case SCTP_ASCONF:
6305                                 case SCTP_ASCONF_ACK:
6306                                         stcb->asoc.peer_supports_asconf = 1;
6307                                         break;
6308                                 case SCTP_FORWARD_CUM_TSN:
6309                                         stcb->asoc.peer_supports_prsctp = 1;
6310                                         break;
6311                                 case SCTP_PACKET_DROPPED:
6312                                         stcb->asoc.peer_supports_pktdrop = 1;
6313                                         break;
6314                                 case SCTP_NR_SELECTIVE_ACK:
6315                                         stcb->asoc.peer_supports_nr_sack = 1;
6316                                         break;
6317                                 case SCTP_STREAM_RESET:
6318                                         stcb->asoc.peer_supports_strreset = 1;
6319                                         break;
6320                                 case SCTP_AUTHENTICATION:
6321                                         stcb->asoc.peer_supports_auth = 1;
6322                                         break;
6323                                 default:
6324                                         /* one I have not learned yet */
6325                                         break;
6326
6327                                 }
6328                         }
6329                 } else if (ptype == SCTP_RANDOM) {
6330                         if (plen > sizeof(random_store))
6331                                 break;
6332                         if (got_random) {
6333                                 /* already processed a RANDOM */
6334                                 goto next_param;
6335                         }
6336                         phdr = sctp_get_next_param(m, offset,
6337                             (struct sctp_paramhdr *)random_store,
6338                             min(sizeof(random_store), plen));
6339                         if (phdr == NULL)
6340                                 return (-26);
6341                         p_random = (struct sctp_auth_random *)phdr;
6342                         random_len = plen - sizeof(*p_random);
6343                         /* enforce the random length */
6344                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6345                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6346                                 return (-27);
6347                         }
6348                         got_random = 1;
6349                 } else if (ptype == SCTP_HMAC_LIST) {
6350                         int num_hmacs;
6351                         int i;
6352
6353                         if (plen > sizeof(hmacs_store))
6354                                 break;
6355                         if (got_hmacs) {
6356                                 /* already processed a HMAC list */
6357                                 goto next_param;
6358                         }
6359                         phdr = sctp_get_next_param(m, offset,
6360                             (struct sctp_paramhdr *)hmacs_store,
6361                             min(plen, sizeof(hmacs_store)));
6362                         if (phdr == NULL)
6363                                 return (-28);
6364                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6365                         hmacs_len = plen - sizeof(*hmacs);
6366                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6367                         /* validate the hmac list */
6368                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6369                                 return (-29);
6370                         }
6371                         if (stcb->asoc.peer_hmacs != NULL)
6372                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6373                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6374                         if (stcb->asoc.peer_hmacs != NULL) {
6375                                 for (i = 0; i < num_hmacs; i++) {
6376                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6377                                             ntohs(hmacs->hmac_ids[i]));
6378                                 }
6379                         }
6380                         got_hmacs = 1;
6381                 } else if (ptype == SCTP_CHUNK_LIST) {
6382                         int i;
6383
6384                         if (plen > sizeof(chunks_store))
6385                                 break;
6386                         if (got_chklist) {
6387                                 /* already processed a Chunks list */
6388                                 goto next_param;
6389                         }
6390                         phdr = sctp_get_next_param(m, offset,
6391                             (struct sctp_paramhdr *)chunks_store,
6392                             min(plen, sizeof(chunks_store)));
6393                         if (phdr == NULL)
6394                                 return (-30);
6395                         chunks = (struct sctp_auth_chunk_list *)phdr;
6396                         num_chunks = plen - sizeof(*chunks);
6397                         if (stcb->asoc.peer_auth_chunks != NULL)
6398                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6399                         else
6400                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6401                         for (i = 0; i < num_chunks; i++) {
6402                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6403                                     stcb->asoc.peer_auth_chunks);
6404                                 /* record asconf/asconf-ack if listed */
6405                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6406                                         saw_asconf = 1;
6407                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6408                                         saw_asconf_ack = 1;
6409
6410                         }
6411                         got_chklist = 1;
6412                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6413                             (ptype == SCTP_STATE_COOKIE) ||
6414                             (ptype == SCTP_UNRECOG_PARAM) ||
6415                             (ptype == SCTP_COOKIE_PRESERVE) ||
6416                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6417                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6418                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6419                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6420                     (ptype == SCTP_SUCCESS_REPORT)) {
6421                          /* don't care */ ;
6422                 } else {
6423                         if ((ptype & 0x8000) == 0x0000) {
6424                                 /*
6425                                  * must stop processing the rest of the
6426                                  * param's. Any report bits were handled
6427                                  * with the call to
6428                                  * sctp_arethere_unrecognized_parameters()
6429                                  * when the INIT or INIT-ACK was first seen.
6430                                  */
6431                                 break;
6432                         }
6433                 }
6434
6435 next_param:
6436                 offset += SCTP_SIZE32(plen);
6437                 if (offset >= limit) {
6438                         break;
6439                 }
6440                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6441                     sizeof(parm_buf));
6442         }
6443         /* Now check to see if we need to purge any addresses */
6444         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6445                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6446                     SCTP_ADDR_NOT_IN_ASSOC) {
6447                         /* This address has been removed from the asoc */
6448                         /* remove and free it */
6449                         stcb->asoc.numnets--;
6450                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6451                         sctp_free_remote_addr(net);
6452                         if (net == stcb->asoc.primary_destination) {
6453                                 stcb->asoc.primary_destination = NULL;
6454                                 sctp_select_primary_destination(stcb);
6455                         }
6456                 }
6457         }
6458         if (ecn_allowed == 0) {
6459                 stcb->asoc.ecn_allowed = 0;
6460         }
6461         /* validate authentication required parameters */
6462         if (got_random && got_hmacs) {
6463                 stcb->asoc.peer_supports_auth = 1;
6464         } else {
6465                 stcb->asoc.peer_supports_auth = 0;
6466         }
6467         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6468                 /* peer does not support auth but sent a chunks list? */
6469                 return (-31);
6470         }
6471         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6472             !stcb->asoc.peer_supports_auth) {
6473                 /* peer supports asconf but not auth? */
6474                 return (-32);
6475         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6476             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6477                 return (-33);
6478         }
6479         /* concatenate the full random key */
6480         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6481         if (chunks != NULL) {
6482                 keylen += sizeof(*chunks) + num_chunks;
6483         }
6484         new_key = sctp_alloc_key(keylen);
6485         if (new_key != NULL) {
6486                 /* copy in the RANDOM */
6487                 if (p_random != NULL) {
6488                         keylen = sizeof(*p_random) + random_len;
6489                         bcopy(p_random, new_key->key, keylen);
6490                 }
6491                 /* append in the AUTH chunks */
6492                 if (chunks != NULL) {
6493                         bcopy(chunks, new_key->key + keylen,
6494                             sizeof(*chunks) + num_chunks);
6495                         keylen += sizeof(*chunks) + num_chunks;
6496                 }
6497                 /* append in the HMACs */
6498                 if (hmacs != NULL) {
6499                         bcopy(hmacs, new_key->key + keylen,
6500                             sizeof(*hmacs) + hmacs_len);
6501                 }
6502         } else {
6503                 /* failed to get memory for the key */
6504                 return (-34);
6505         }
6506         if (stcb->asoc.authinfo.peer_random != NULL)
6507                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6508         stcb->asoc.authinfo.peer_random = new_key;
6509         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6510         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6511
6512         return (0);
6513 }
6514
6515 int
6516 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6517     struct sctp_nets *net)
6518 {
6519         /* make sure the requested primary address exists in the assoc */
6520         if (net == NULL && sa)
6521                 net = sctp_findnet(stcb, sa);
6522
6523         if (net == NULL) {
6524                 /* didn't find the requested primary address! */
6525                 return (-1);
6526         } else {
6527                 /* set the primary address */
6528                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6529                         /* Must be confirmed, so queue to set */
6530                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6531                         return (0);
6532                 }
6533                 stcb->asoc.primary_destination = net;
6534                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6535                 net = TAILQ_FIRST(&stcb->asoc.nets);
6536                 if (net != stcb->asoc.primary_destination) {
6537                         /*
6538                          * first one on the list is NOT the primary
6539                          * sctp_cmpaddr() is much more efficient if the
6540                          * primary is the first on the list, make it so.
6541                          */
6542                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6543                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6544                 }
6545                 return (0);
6546         }
6547 }
6548
6549 int
6550 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6551 {
6552         /*
6553          * This function serves two purposes. It will see if a TAG can be
6554          * re-used and return 1 for yes it is ok and 0 for don't use that
6555          * tag. A secondary function it will do is purge out old tags that
6556          * can be removed.
6557          */
6558         struct sctpvtaghead *chain;
6559         struct sctp_tagblock *twait_block;
6560         struct sctpasochead *head;
6561         struct sctp_tcb *stcb;
6562         int i;
6563
6564         SCTP_INP_INFO_RLOCK();
6565         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6566             SCTP_BASE_INFO(hashasocmark))];
6567         if (head == NULL) {
6568                 /* invalid vtag */
6569                 goto skip_vtag_check;
6570         }
6571         LIST_FOREACH(stcb, head, sctp_asocs) {
6572                 /*
6573                  * We choose not to lock anything here. TCB's can't be
6574                  * removed since we have the read lock, so they can't be
6575                  * freed on us, same thing for the INP. I may be wrong with
6576                  * this assumption, but we will go with it for now :-)
6577                  */
6578                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6579                         continue;
6580                 }
6581                 if (stcb->asoc.my_vtag == tag) {
6582                         /* candidate */
6583                         if (stcb->rport != rport) {
6584                                 continue;
6585                         }
6586                         if (stcb->sctp_ep->sctp_lport != lport) {
6587                                 continue;
6588                         }
6589                         /* Its a used tag set */
6590                         SCTP_INP_INFO_RUNLOCK();
6591                         return (0);
6592                 }
6593         }
6594 skip_vtag_check:
6595
6596         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6597         /* Now what about timed wait ? */
6598         if (!LIST_EMPTY(chain)) {
6599                 /*
6600                  * Block(s) are present, lets see if we have this tag in the
6601                  * list
6602                  */
6603                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6604                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6605                                 if (twait_block->vtag_block[i].v_tag == 0) {
6606                                         /* not used */
6607                                         continue;
6608                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6609                                     now->tv_sec) {
6610                                         /* Audit expires this guy */
6611                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6612                                         twait_block->vtag_block[i].v_tag = 0;
6613                                         twait_block->vtag_block[i].lport = 0;
6614                                         twait_block->vtag_block[i].rport = 0;
6615                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6616                                             (twait_block->vtag_block[i].lport == lport) &&
6617                                     (twait_block->vtag_block[i].rport == rport)) {
6618                                         /* Bad tag, sorry :< */
6619                                         SCTP_INP_INFO_RUNLOCK();
6620                                         return (0);
6621                                 }
6622                         }
6623                 }
6624         }
6625         SCTP_INP_INFO_RUNLOCK();
6626         return (1);
6627 }
6628
6629
6630 static sctp_assoc_t reneged_asoc_ids[256];
6631 static uint8_t reneged_at = 0;
6632
6633
6634 static void
6635 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6636 {
6637         /*
6638          * We must hunt this association for MBUF's past the cumack (i.e.
6639          * out of order data that we can renege on).
6640          */
6641         struct sctp_association *asoc;
6642         struct sctp_tmit_chunk *chk, *nchk;
6643         uint32_t cumulative_tsn_p1;
6644         struct sctp_queued_to_read *ctl, *nctl;
6645         int cnt, strmat;
6646         uint32_t gap, i;
6647         int fnd = 0;
6648
6649         /* We look for anything larger than the cum-ack + 1 */
6650
6651         asoc = &stcb->asoc;
6652         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6653                 /* none we can reneg on. */
6654                 return;
6655         }
6656         SCTP_STAT_INCR(sctps_protocol_drains_done);
6657         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6658         cnt = 0;
6659         /* First look in the re-assembly queue */
6660         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6661                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6662                         /* Yep it is above cum-ack */
6663                         cnt++;
6664                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6665                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6666                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6667                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6668                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6669                         if (chk->data) {
6670                                 sctp_m_freem(chk->data);
6671                                 chk->data = NULL;
6672                         }
6673                         sctp_free_a_chunk(stcb, chk);
6674                 }
6675         }
6676         /* Ok that was fun, now we will drain all the inbound streams? */
6677         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6678                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6679                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6680                                 /* Yep it is above cum-ack */
6681                                 cnt++;
6682                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6683                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6684                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6685                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6686                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6687                                 if (ctl->data) {
6688                                         sctp_m_freem(ctl->data);
6689                                         ctl->data = NULL;
6690                                 }
6691                                 sctp_free_remote_addr(ctl->whoFrom);
6692                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6693                                 SCTP_DECR_READQ_COUNT();
6694                         }
6695                 }
6696         }
6697         if (cnt) {
6698                 /* We must back down to see what the new highest is */
6699                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6700                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6701                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6702                                 asoc->highest_tsn_inside_map = i;
6703                                 fnd = 1;
6704                                 break;
6705                         }
6706                 }
6707                 if (!fnd) {
6708                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6709                 }
6710                 /*
6711                  * Question, should we go through the delivery queue? The
6712                  * only reason things are on here is the app not reading OR
6713                  * a p-d-api up. An attacker COULD send enough in to
6714                  * initiate the PD-API and then send a bunch of stuff to
6715                  * other streams... these would wind up on the delivery
6716                  * queue.. and then we would not get to them. But in order
6717                  * to do this I then have to back-track and un-deliver
6718                  * sequence numbers in streams.. el-yucko. I think for now
6719                  * we will NOT look at the delivery queue and leave it to be
6720                  * something to consider later. An alternative would be to
6721                  * abort the P-D-API with a notification and then deliver
6722                  * the data.... Or another method might be to keep track of
6723                  * how many times the situation occurs and if we see a
6724                  * possible attack underway just abort the association.
6725                  */
6726 #ifdef SCTP_DEBUG
6727                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6728 #endif
6729                 /*
6730                  * Now do we need to find a new
6731                  * asoc->highest_tsn_inside_map?
6732                  */
6733                 asoc->last_revoke_count = cnt;
6734                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6735                 /* sa_ignore NO_NULL_CHK */
6736                 sctp_send_sack(stcb);
6737                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6738                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6739                 reneged_at++;
6740         }
6741         /*
6742          * Another issue, in un-setting the TSN's in the mapping array we
6743          * DID NOT adjust the highest_tsn marker.  This will cause one of
6744          * two things to occur. It may cause us to do extra work in checking
6745          * for our mapping array movement. More importantly it may cause us
6746          * to SACK every datagram. This may not be a bad thing though since
6747          * we will recover once we get our cum-ack above and all this stuff
6748          * we dumped recovered.
6749          */
6750 }
6751
6752 void
6753 sctp_drain()
6754 {
6755         /*
6756          * We must walk the PCB lists for ALL associations here. The system
6757          * is LOW on MBUF's and needs help. This is where reneging will
6758          * occur. We really hope this does NOT happen!
6759          */
6760         VNET_ITERATOR_DECL(vnet_iter);
6761         VNET_LIST_RLOCK_NOSLEEP();
6762         VNET_FOREACH(vnet_iter) {
6763                 CURVNET_SET(vnet_iter);
6764                 struct sctp_inpcb *inp;
6765                 struct sctp_tcb *stcb;
6766
6767                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6768                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6769 #ifdef VIMAGE
6770                         continue;
6771 #else
6772                         return;
6773 #endif
6774                 }
6775                 SCTP_INP_INFO_RLOCK();
6776                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6777                         /* For each endpoint */
6778                         SCTP_INP_RLOCK(inp);
6779                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6780                                 /* For each association */
6781                                 SCTP_TCB_LOCK(stcb);
6782                                 sctp_drain_mbufs(inp, stcb);
6783                                 SCTP_TCB_UNLOCK(stcb);
6784                         }
6785                         SCTP_INP_RUNLOCK(inp);
6786                 }
6787                 SCTP_INP_INFO_RUNLOCK();
6788                 CURVNET_RESTORE();
6789         }
6790         VNET_LIST_RUNLOCK_NOSLEEP();
6791 }
6792
6793 /*
6794  * start a new iterator
6795  * iterates through all endpoints and associations based on the pcb_state
6796  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6797  * assocs and "ef" (optional) is executed when the iterator completes.
6798  * "inpf" (optional) is executed for each new endpoint as it is being
6799  * iterated through. inpe (optional) is called when the inp completes
6800  * its way through all the stcbs.
6801  */
6802 int
6803 sctp_initiate_iterator(inp_func inpf,
6804     asoc_func af,
6805     inp_func inpe,
6806     uint32_t pcb_state,
6807     uint32_t pcb_features,
6808     uint32_t asoc_state,
6809     void *argp,
6810     uint32_t argi,
6811     end_func ef,
6812     struct sctp_inpcb *s_inp,
6813     uint8_t chunk_output_off)
6814 {
6815         struct sctp_iterator *it = NULL;
6816
6817         if (af == NULL) {
6818                 return (-1);
6819         }
6820         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6821             SCTP_M_ITER);
6822         if (it == NULL) {
6823                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6824                 return (ENOMEM);
6825         }
6826         memset(it, 0, sizeof(*it));
6827         it->function_assoc = af;
6828         it->function_inp = inpf;
6829         if (inpf)
6830                 it->done_current_ep = 0;
6831         else
6832                 it->done_current_ep = 1;
6833         it->function_atend = ef;
6834         it->pointer = argp;
6835         it->val = argi;
6836         it->pcb_flags = pcb_state;
6837         it->pcb_features = pcb_features;
6838         it->asoc_state = asoc_state;
6839         it->function_inp_end = inpe;
6840         it->no_chunk_output = chunk_output_off;
6841         it->vn = curvnet;
6842         if (s_inp) {
6843                 /* Assume lock is held here */
6844                 it->inp = s_inp;
6845                 SCTP_INP_INCR_REF(it->inp);
6846                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
6847         } else {
6848                 SCTP_INP_INFO_RLOCK();
6849                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
6850                 if (it->inp) {
6851                         SCTP_INP_INCR_REF(it->inp);
6852                 }
6853                 SCTP_INP_INFO_RUNLOCK();
6854                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
6855
6856         }
6857         SCTP_IPI_ITERATOR_WQ_LOCK();
6858
6859         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
6860         if (sctp_it_ctl.iterator_running == 0) {
6861                 sctp_wakeup_iterator();
6862         }
6863         SCTP_IPI_ITERATOR_WQ_UNLOCK();
6864         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
6865         return (0);
6866 }