sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *   the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $     */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <netinet/sctp_os.h>
  39 #include <sys/proc.h>
  40 #include <netinet/sctp_var.h>
  41 #include <netinet/sctp_sysctl.h>
  42 #include <netinet/sctp_pcb.h>
  43 #include <netinet/sctputil.h>
  44 #include <netinet/sctp.h>
  45 #include <netinet/sctp_header.h>
  46 #include <netinet/sctp_asconf.h>
  47 #include <netinet/sctp_output.h>
  48 #include <netinet/sctp_timer.h>
  49 #include <netinet/sctp_bsd_addr.h>
  50 #include <netinet/sctp_dtrace_define.h>
  51 #include <netinet/udp.h>
  52 #include <sys/sched.h>
  53 #include <sys/smp.h>
  54 #include <sys/unistd.h>
  55
  56
  57 VNET_DEFINE(struct sctp_base_info, system_base_info);
  58
  59 /* FIX: we don't handle multiple link local scopes */
  60 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  61 #ifdef INET6
  62 int
  63 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  64 {
  65         struct sockaddr_in6 tmp_a, tmp_b;
  66
  67         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  68         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  69                 return 0;
  70         }
  71         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  72         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  73                 return 0;
  74         }
  75         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  76 }
  77
  78 #endif
  79
  80 void
  81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  82 {
  83         /*
  84          * We really don't need to lock this, but I will just because it
  85          * does not hurt.
  86          */
  87         SCTP_INP_INFO_RLOCK();
  88         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  89         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  90         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  91         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  92         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  93         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  94         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  95         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  96
  97         SCTP_INP_INFO_RUNLOCK();
  98 }
  99
 100 /*
 101  * Addresses are added to VRF's (Virtual Router's). For BSD we
 102  * have only the default VRF 0. We maintain a hash list of
 103  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 104  * these has a list of addresses. When we add a new address
 105  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 106  * not exist we create it and add it to the list of IFN's
 107  * within the VRF. Once we have the sctp_ifn, we add the
 108  * address to the list. So we look something like:
 109  *
 110  * hash-vrf-table
 111  *   vrf-> ifn-> ifn -> ifn
 112  *   vrf    |
 113  *    ...   +--ifa-> ifa -> ifa
 114  *   vrf
 115  *
 116  * We keep these separate lists since the SCTP subsystem will
 117  * point to these from its source address selection nets structure.
 118  * When an address is deleted it does not happen right away on
 119  * the SCTP side, it gets scheduled. What we do when a
 120  * delete happens is immediately remove the address from
 121  * the master list and decrement the refcount. As our
 122  * addip iterator works through and frees the src address
 123  * selection pointing to the sctp_ifa, eventually the refcount
 124  * will reach 0 and we will delete it. Note that it is assumed
 125  * that any locking on system level ifn/ifa is done at the
 126  * caller of these functions and these routines will only
 127  * lock the SCTP structures as they add or delete things.
 128  *
 129  * Other notes on VRF concepts.
 130  *  - An endpoint can be in multiple VRF's
 131  *  - An association lives within a VRF and only one VRF.
 132  *  - Any incoming packet we can deduce the VRF for by
 133  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 134  *  - Any downward send call or connect call must supply the
 135  *    VRF via ancillary data or via some sort of set default
 136  *    VRF socket option call (again for BSD no brainer since
 137  *    the VRF is always 0).
 138  *  - An endpoint may add multiple VRF's to it.
 139  *  - Listening sockets can accept associations in any
 140  *    of the VRF's they are in but the assoc will end up
 141  *    in only one VRF (gotten from the packet or connect/send).
 142  *
 143  */
 144
 145 struct sctp_vrf *
 146 sctp_allocate_vrf(int vrf_id)
 147 {
 148         struct sctp_vrf *vrf = NULL;
 149         struct sctp_vrflist *bucket;
 150
 151         /* First allocate the VRF structure */
 152         vrf = sctp_find_vrf(vrf_id);
 153         if (vrf) {
 154                 /* Already allocated */
 155                 return (vrf);
 156         }
 157         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 158             SCTP_M_VRF);
 159         if (vrf == NULL) {
 160                 /* No memory */
 161 #ifdef INVARIANTS
 162                 panic("No memory for VRF:%d", vrf_id);
 163 #endif
 164                 return (NULL);
 165         }
 166         /* setup the VRF */
 167         memset(vrf, 0, sizeof(struct sctp_vrf));
 168         vrf->vrf_id = vrf_id;
 169         LIST_INIT(&vrf->ifnlist);
 170         vrf->total_ifa_count = 0;
 171         vrf->refcount = 0;
 172         /* now also setup table ids */
 173         SCTP_INIT_VRF_TABLEID(vrf);
 174         /* Init the HASH of addresses */
 175         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 176             &vrf->vrf_addr_hashmark);
 177         if (vrf->vrf_addr_hash == NULL) {
 178                 /* No memory */
 179 #ifdef INVARIANTS
 180                 panic("No memory for VRF:%d", vrf_id);
 181 #endif
 182                 SCTP_FREE(vrf, SCTP_M_VRF);
 183                 return (NULL);
 184         }
 185         /* Add it to the hash table */
 186         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 187         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 188         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 189         return (vrf);
 190 }
 191
 192
 193 struct sctp_ifn *
 194 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 195 {
 196         struct sctp_ifn *sctp_ifnp;
 197         struct sctp_ifnlist *hash_ifn_head;
 198
 199         /*
 200          * We assume the lock is held for the addresses if that's wrong
 201          * problems could occur :-)
 202          */
 203         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 204         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 205                 if (sctp_ifnp->ifn_index == ifn_index) {
 206                         return (sctp_ifnp);
 207                 }
 208                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 209                         return (sctp_ifnp);
 210                 }
 211         }
 212         return (NULL);
 213 }
 214
 215
 216
 217 struct sctp_vrf *
 218 sctp_find_vrf(uint32_t vrf_id)
 219 {
 220         struct sctp_vrflist *bucket;
 221         struct sctp_vrf *liste;
 222
 223         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 224         LIST_FOREACH(liste, bucket, next_vrf) {
 225                 if (vrf_id == liste->vrf_id) {
 226                         return (liste);
 227                 }
 228         }
 229         return (NULL);
 230 }
 231
 232 void
 233 sctp_free_vrf(struct sctp_vrf *vrf)
 234 {
 235         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 236                 if (vrf->vrf_addr_hash) {
 237                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 238                         vrf->vrf_addr_hash = NULL;
 239                 }
 240                 /* We zero'd the count */
 241                 LIST_REMOVE(vrf, next_vrf);
 242                 SCTP_FREE(vrf, SCTP_M_VRF);
 243                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 244         }
 245 }
 246
 247 void
 248 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 249 {
 250         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 251                 /* We zero'd the count */
 252                 if (sctp_ifnp->vrf) {
 253                         sctp_free_vrf(sctp_ifnp->vrf);
 254                 }
 255                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 256                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 257         }
 258 }
 259
 260 void
 261 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 262 {
 263         struct sctp_ifn *sctp_ifnp;
 264
 265         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 266         if (sctp_ifnp != NULL) {
 267                 sctp_ifnp->ifn_mtu = mtu;
 268         }
 269 }
 270
 271
 272 void
 273 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 274 {
 275         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 276                 /* We zero'd the count */
 277                 if (sctp_ifap->ifn_p) {
 278                         sctp_free_ifn(sctp_ifap->ifn_p);
 279                 }
 280                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 281                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 282         }
 283 }
 284
 285 static void
 286 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 287 {
 288         struct sctp_ifn *found;
 289
 290         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 291         if (found == NULL) {
 292                 /* Not in the list.. sorry */
 293                 return;
 294         }
 295         if (hold_addr_lock == 0)
 296                 SCTP_IPI_ADDR_WLOCK();
 297         LIST_REMOVE(sctp_ifnp, next_bucket);
 298         LIST_REMOVE(sctp_ifnp, next_ifn);
 299         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 300             sctp_ifnp->registered_af);
 301         if (hold_addr_lock == 0)
 302                 SCTP_IPI_ADDR_WUNLOCK();
 303         /* Take away the reference, and possibly free it */
 304         sctp_free_ifn(sctp_ifnp);
 305 }
 306
 307 void
 308 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 309     const char *if_name, uint32_t ifn_index)
 310 {
 311         struct sctp_vrf *vrf;
 312         struct sctp_ifa *sctp_ifap = NULL;
 313
 314         SCTP_IPI_ADDR_RLOCK();
 315         vrf = sctp_find_vrf(vrf_id);
 316         if (vrf == NULL) {
 317                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 318                 goto out;
 319
 320         }
 321         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 322         if (sctp_ifap == NULL) {
 323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 324                 goto out;
 325         }
 326         if (sctp_ifap->ifn_p == NULL) {
 327                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 328                 goto out;
 329         }
 330         if (if_name) {
 331                 int len1, len2;
 332
 333                 len1 = strlen(if_name);
 334                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 335                 if (len1 != len2) {
 336                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 337                             len1, len2);
 338                         goto out;
 339                 }
 340                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 341                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 342                             sctp_ifap->ifn_p->ifn_name,
 343                             if_name);
 344                         goto out;
 345                 }
 346         } else {
 347                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 348                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 349                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 350                         goto out;
 351                 }
 352         }
 353
 354         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 355         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 356 out:
 357         SCTP_IPI_ADDR_RUNLOCK();
 358 }
 359
 360 void
 361 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 362     const char *if_name, uint32_t ifn_index)
 363 {
 364         struct sctp_vrf *vrf;
 365         struct sctp_ifa *sctp_ifap = NULL;
 366
 367         SCTP_IPI_ADDR_RLOCK();
 368         vrf = sctp_find_vrf(vrf_id);
 369         if (vrf == NULL) {
 370                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 371                 goto out;
 372
 373         }
 374         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 375         if (sctp_ifap == NULL) {
 376                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 377                 goto out;
 378         }
 379         if (sctp_ifap->ifn_p == NULL) {
 380                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 381                 goto out;
 382         }
 383         if (if_name) {
 384                 int len1, len2;
 385
 386                 len1 = strlen(if_name);
 387                 len2 = strlen(sctp_ifap->ifn_p->ifn_name);
 388                 if (len1 != len2) {
 389                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n",
 390                             len1, len2);
 391                         goto out;
 392                 }
 393                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
 394                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 395                             sctp_ifap->ifn_p->ifn_name,
 396                             if_name);
 397                         goto out;
 398                 }
 399         } else {
 400                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 401                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 402                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 403                         goto out;
 404                 }
 405         }
 406
 407         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 408         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 409 out:
 410         SCTP_IPI_ADDR_RUNLOCK();
 411 }
 412
 413 /*-
 414  * Add an ifa to an ifn.
 415  * Register the interface as necessary.
 416  * NOTE: ADDR write lock MUST be held.
 417  */
 418 static void
 419 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 420 {
 421         int ifa_af;
 422
 423         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 424         sctp_ifap->ifn_p = sctp_ifnp;
 425         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 426         /* update address counts */
 427         sctp_ifnp->ifa_count++;
 428         ifa_af = sctp_ifap->address.sa.sa_family;
 429         switch (ifa_af) {
 430 #ifdef INET
 431         case AF_INET:
 432                 sctp_ifnp->num_v4++;
 433                 break;
 434 #endif
 435 #ifdef INET6
 436         case AF_INET6:
 437                 sctp_ifnp->num_v6++;
 438                 break;
 439 #endif
 440         default:
 441                 break;
 442         }
 443         if (sctp_ifnp->ifa_count == 1) {
 444                 /* register the new interface */
 445                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 446                 sctp_ifnp->registered_af = ifa_af;
 447         }
 448 }
 449
 450 /*-
 451  * Remove an ifa from its ifn.
 452  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 453  * the interface based on the remaining address families left.
 454  * NOTE: ADDR write lock MUST be held.
 455  */
 456 static void
 457 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 458 {
 459         uint32_t ifn_index;
 460
 461         LIST_REMOVE(sctp_ifap, next_ifa);
 462         if (sctp_ifap->ifn_p) {
 463                 /* update address counts */
 464                 sctp_ifap->ifn_p->ifa_count--;
 465                 switch (sctp_ifap->address.sa.sa_family) {
 466 #ifdef INET
 467                 case AF_INET:
 468                         sctp_ifap->ifn_p->num_v4--;
 469                         break;
 470 #endif
 471 #ifdef INET6
 472                 case AF_INET6:
 473                         sctp_ifap->ifn_p->num_v6--;
 474                         break;
 475 #endif
 476                 default:
 477                         break;
 478                 }
 479
 480                 ifn_index = sctp_ifap->ifn_p->ifn_index;
 481                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 482                         /* remove the ifn, possibly freeing it */
 483                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 484                 } else {
 485                         /* re-register address family type, if needed */
 486                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 487                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 488                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
 489                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
 490                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 491                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 492                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 493                                 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
 494                                 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
 495                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 496                         }
 497                         /* free the ifn refcount */
 498                         sctp_free_ifn(sctp_ifap->ifn_p);
 499                 }
 500                 sctp_ifap->ifn_p = NULL;
 501         }
 502 }
 503
 504 struct sctp_ifa *
 505 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 506     uint32_t ifn_type, const char *if_name, void *ifa,
 507     struct sockaddr *addr, uint32_t ifa_flags,
 508     int dynamic_add)
 509 {
 510         struct sctp_vrf *vrf;
 511         struct sctp_ifn *sctp_ifnp = NULL;
 512         struct sctp_ifa *sctp_ifap = NULL;
 513         struct sctp_ifalist *hash_addr_head;
 514         struct sctp_ifnlist *hash_ifn_head;
 515         uint32_t hash_of_addr;
 516         int new_ifn_af = 0;
 517
 518 #ifdef SCTP_DEBUG
 519         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 520         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 521 #endif
 522         SCTP_IPI_ADDR_WLOCK();
 523         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 524         if (sctp_ifnp) {
 525                 vrf = sctp_ifnp->vrf;
 526         } else {
 527                 vrf = sctp_find_vrf(vrf_id);
 528                 if (vrf == NULL) {
 529                         vrf = sctp_allocate_vrf(vrf_id);
 530                         if (vrf == NULL) {
 531                                 SCTP_IPI_ADDR_WUNLOCK();
 532                                 return (NULL);
 533                         }
 534                 }
 535         }
 536         if (sctp_ifnp == NULL) {
 537                 /*
 538                  * build one and add it, can't hold lock until after malloc
 539                  * done though.
 540                  */
 541                 SCTP_IPI_ADDR_WUNLOCK();
 542                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 543                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 544                 if (sctp_ifnp == NULL) {
 545 #ifdef INVARIANTS
 546                         panic("No memory for IFN");
 547 #endif
 548                         return (NULL);
 549                 }
 550                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 551                 sctp_ifnp->ifn_index = ifn_index;
 552                 sctp_ifnp->ifn_p = ifn;
 553                 sctp_ifnp->ifn_type = ifn_type;
 554                 sctp_ifnp->refcount = 0;
 555                 sctp_ifnp->vrf = vrf;
 556                 atomic_add_int(&vrf->refcount, 1);
 557                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 558                 if (if_name != NULL) {
 559                         memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
 560                 } else {
 561                         memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
 562                 }
 563                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 564                 LIST_INIT(&sctp_ifnp->ifalist);
 565                 SCTP_IPI_ADDR_WLOCK();
 566                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 567                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 568                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 569                 new_ifn_af = 1;
 570         }
 571         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 572         if (sctp_ifap) {
 573                 /* Hmm, it already exists? */
 574                 if ((sctp_ifap->ifn_p) &&
 575                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 576                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 577                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 578                             sctp_ifap);
 579                         if (new_ifn_af) {
 580                                 /* Remove the created one that we don't want */
 581                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 582                         }
 583                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 584                                 /* easy to solve, just switch back to active */
 585                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 586                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 587                                 sctp_ifap->ifn_p = sctp_ifnp;
 588                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 589                         }
 590         exit_stage_left:
 591                         SCTP_IPI_ADDR_WUNLOCK();
 592                         return (sctp_ifap);
 593                 } else {
 594                         if (sctp_ifap->ifn_p) {
 595                                 /*
 596                                  * The last IFN gets the address, remove the
 597                                  * old one
 598                                  */
 599                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 600                                     sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 601                                     sctp_ifap->ifn_p->ifn_index, if_name,
 602                                     ifn_index);
 603                                 /* remove the address from the old ifn */
 604                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 605                                 /* move the address over to the new ifn */
 606                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 607                                 goto exit_stage_left;
 608                         } else {
 609                                 /* repair ifnp which was NULL ? */
 610                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 611                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 612                                     sctp_ifnp, sctp_ifap);
 613                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 614                         }
 615                         goto exit_stage_left;
 616                 }
 617         }
 618         SCTP_IPI_ADDR_WUNLOCK();
 619         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 620         if (sctp_ifap == NULL) {
 621 #ifdef INVARIANTS
 622                 panic("No memory for IFA");
 623 #endif
 624                 return (NULL);
 625         }
 626         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 627         sctp_ifap->ifn_p = sctp_ifnp;
 628         atomic_add_int(&sctp_ifnp->refcount, 1);
 629         sctp_ifap->vrf_id = vrf_id;
 630         sctp_ifap->ifa = ifa;
 631         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 632         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 633         sctp_ifap->flags = ifa_flags;
 634         /* Set scope */
 635         switch (sctp_ifap->address.sa.sa_family) {
 636 #ifdef INET
 637         case AF_INET:
 638                 {
 639                         struct sockaddr_in *sin;
 640
 641                         sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
 642                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 643                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 644                                 sctp_ifap->src_is_loop = 1;
 645                         }
 646                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 647                                 sctp_ifap->src_is_priv = 1;
 648                         }
 649                         sctp_ifnp->num_v4++;
 650                         if (new_ifn_af)
 651                                 new_ifn_af = AF_INET;
 652                         break;
 653                 }
 654 #endif
 655 #ifdef INET6
 656         case AF_INET6:
 657                 {
 658                         /* ok to use deprecated addresses? */
 659                         struct sockaddr_in6 *sin6;
 660
 661                         sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
 662                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 663                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 664                                 sctp_ifap->src_is_loop = 1;
 665                         }
 666                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 667                                 sctp_ifap->src_is_priv = 1;
 668                         }
 669                         sctp_ifnp->num_v6++;
 670                         if (new_ifn_af)
 671                                 new_ifn_af = AF_INET6;
 672                         break;
 673                 }
 674 #endif
 675         default:
 676                 new_ifn_af = 0;
 677                 break;
 678         }
 679         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 680
 681         if ((sctp_ifap->src_is_priv == 0) &&
 682             (sctp_ifap->src_is_loop == 0)) {
 683                 sctp_ifap->src_is_glob = 1;
 684         }
 685         SCTP_IPI_ADDR_WLOCK();
 686         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 687         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 688         sctp_ifap->refcount = 1;
 689         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 690         sctp_ifnp->ifa_count++;
 691         vrf->total_ifa_count++;
 692         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 693         if (new_ifn_af) {
 694                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 695                 sctp_ifnp->registered_af = new_ifn_af;
 696         }
 697         SCTP_IPI_ADDR_WUNLOCK();
 698         if (dynamic_add) {
 699                 /*
 700                  * Bump up the refcount so that when the timer completes it
 701                  * will drop back down.
 702                  */
 703                 struct sctp_laddr *wi;
 704
 705                 atomic_add_int(&sctp_ifap->refcount, 1);
 706                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 707                 if (wi == NULL) {
 708                         /*
 709                          * Gak, what can we do? We have lost an address
 710                          * change can you say HOSED?
 711                          */
 712                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 713                         /* Opps, must decrement the count */
 714                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 715                             if_name);
 716                         return (NULL);
 717                 }
 718                 SCTP_INCR_LADDR_COUNT();
 719                 bzero(wi, sizeof(*wi));
 720                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 721                 wi->ifa = sctp_ifap;
 722                 wi->action = SCTP_ADD_IP_ADDRESS;
 723
 724                 SCTP_WQ_ADDR_LOCK();
 725                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 726                 SCTP_WQ_ADDR_UNLOCK();
 727
 728                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 729                     (struct sctp_inpcb *)NULL,
 730                     (struct sctp_tcb *)NULL,
 731                     (struct sctp_nets *)NULL);
 732         } else {
 733                 /* it's ready for use */
 734                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 735         }
 736         return (sctp_ifap);
 737 }
 738
 739 void
 740 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 741     uint32_t ifn_index, const char *if_name)
 742 {
 743         struct sctp_vrf *vrf;
 744         struct sctp_ifa *sctp_ifap = NULL;
 745
 746         SCTP_IPI_ADDR_WLOCK();
 747         vrf = sctp_find_vrf(vrf_id);
 748         if (vrf == NULL) {
 749                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 750                 goto out_now;
 751         }
 752 #ifdef SCTP_DEBUG
 753         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 754         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 755 #endif
 756         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 757         if (sctp_ifap) {
 758                 /* Validate the delete */
 759                 if (sctp_ifap->ifn_p) {
 760                         int valid = 0;
 761
 762                         /*-
 763                          * The name has priority over the ifn_index
 764                          * if its given. We do this especially for
 765                          * panda who might recycle indexes fast.
 766                          */
 767                         if (if_name) {
 768                                 int len1, len2;
 769
 770                                 len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
 771                                 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
 772                                 if (len1 && len2 && (len1 == len2)) {
 773                                         /* we can compare them */
 774                                         if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) {
 775                                                 /*
 776                                                  * They match its a correct
 777                                                  * delete
 778                                                  */
 779                                                 valid = 1;
 780                                         }
 781                                 }
 782                         }
 783                         if (!valid) {
 784                                 /* last ditch check ifn_index */
 785                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 786                                         valid = 1;
 787                                 }
 788                         }
 789                         if (!valid) {
 790                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 791                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 792                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 793                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 794                                 SCTP_IPI_ADDR_WUNLOCK();
 795                                 return;
 796                         }
 797                 }
 798                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
 799                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 800                 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
 801                 vrf->total_ifa_count--;
 802                 LIST_REMOVE(sctp_ifap, next_bucket);
 803                 sctp_remove_ifa_from_ifn(sctp_ifap);
 804         }
 805 #ifdef SCTP_DEBUG
 806         else {
 807                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 808                     ifn_index);
 809                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 810         }
 811 #endif
 812
 813 out_now:
 814         SCTP_IPI_ADDR_WUNLOCK();
 815         if (sctp_ifap) {
 816                 struct sctp_laddr *wi;
 817
 818                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 819                 if (wi == NULL) {
 820                         /*
 821                          * Gak, what can we do? We have lost an address
 822                          * change can you say HOSED?
 823                          */
 824                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 825
 826                         /* Oops, must decrement the count */
 827                         sctp_free_ifa(sctp_ifap);
 828                         return;
 829                 }
 830                 SCTP_INCR_LADDR_COUNT();
 831                 bzero(wi, sizeof(*wi));
 832                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 833                 wi->ifa = sctp_ifap;
 834                 wi->action = SCTP_DEL_IP_ADDRESS;
 835                 SCTP_WQ_ADDR_LOCK();
 836                 /*
 837                  * Should this really be a tailq? As it is we will process
 838                  * the newest first :-0
 839                  */
 840                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 841                 SCTP_WQ_ADDR_UNLOCK();
 842
 843                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 844                     (struct sctp_inpcb *)NULL,
 845                     (struct sctp_tcb *)NULL,
 846                     (struct sctp_nets *)NULL);
 847         }
 848         return;
 849 }
 850
 851
 852 static struct sctp_tcb *
 853 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
 854     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
 855 {
 856         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
 857         /*
 858          * If we support the TCP model, then we must now dig through to see
 859          * if we can find our endpoint in the list of tcp ep's.
 860          */
 861         uint16_t lport, rport;
 862         struct sctppcbhead *ephead;
 863         struct sctp_inpcb *inp;
 864         struct sctp_laddr *laddr;
 865         struct sctp_tcb *stcb;
 866         struct sctp_nets *net;
 867
 868         if ((to == NULL) || (from == NULL)) {
 869                 return (NULL);
 870         }
 871         switch (to->sa_family) {
 872 #ifdef INET
 873         case AF_INET:
 874                 if (from->sa_family == AF_INET) {
 875                         lport = ((struct sockaddr_in *)to)->sin_port;
 876                         rport = ((struct sockaddr_in *)from)->sin_port;
 877                 } else {
 878                         return (NULL);
 879                 }
 880                 break;
 881 #endif
 882 #ifdef INET6
 883         case AF_INET6:
 884                 if (from->sa_family == AF_INET6) {
 885                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
 886                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
 887                 } else {
 888                         return (NULL);
 889                 }
 890                 break;
 891 #endif
 892         default:
 893                 return (NULL);
 894         }
 895         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
 896         /*
 897          * Ok now for each of the guys in this bucket we must look and see:
 898          * - Does the remote port match. - Does there single association's
 899          * addresses match this address (to). If so we update p_ep to point
 900          * to this ep and return the tcb from it.
 901          */
 902         LIST_FOREACH(inp, ephead, sctp_hash) {
 903                 SCTP_INP_RLOCK(inp);
 904                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
 905                         SCTP_INP_RUNLOCK(inp);
 906                         continue;
 907                 }
 908                 if (lport != inp->sctp_lport) {
 909                         SCTP_INP_RUNLOCK(inp);
 910                         continue;
 911                 }
 912                 if (inp->def_vrf_id != vrf_id) {
 913                         SCTP_INP_RUNLOCK(inp);
 914                         continue;
 915                 }
 916                 /* check to see if the ep has one of the addresses */
 917                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
 918                         /* We are NOT bound all, so look further */
 919                         int match = 0;
 920
 921                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
 922
 923                                 if (laddr->ifa == NULL) {
 924                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
 925                                         continue;
 926                                 }
 927                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 928                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 929                                         continue;
 930                                 }
 931                                 if (laddr->ifa->address.sa.sa_family ==
 932                                     to->sa_family) {
 933                                         /* see if it matches */
 934
 935 #ifdef INET
 936                                         if (from->sa_family == AF_INET) {
 937                                                 struct sockaddr_in *intf_addr,
 938                                                            *sin;
 939
 940                                                 intf_addr = &laddr->ifa->address.sin;
 941                                                 sin = (struct sockaddr_in *)to;
 942                                                 if (sin->sin_addr.s_addr ==
 943                                                     intf_addr->sin_addr.s_addr) {
 944                                                         match = 1;
 945                                                         break;
 946                                                 }
 947                                         }
 948 #endif
 949 #ifdef INET6
 950                                         if (from->sa_family == AF_INET6) {
 951                                                 struct sockaddr_in6 *intf_addr6;
 952                                                 struct sockaddr_in6 *sin6;
 953
 954                                                 sin6 = (struct sockaddr_in6 *)
 955                                                     to;
 956                                                 intf_addr6 = &laddr->ifa->address.sin6;
 957
 958                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
 959                                                     intf_addr6)) {
 960                                                         match = 1;
 961                                                         break;
 962                                                 }
 963                                         }
 964 #endif
 965                                 }
 966                         }
 967                         if (match == 0) {
 968                                 /* This endpoint does not have this address */
 969                                 SCTP_INP_RUNLOCK(inp);
 970                                 continue;
 971                         }
 972                 }
 973                 /*
 974                  * Ok if we hit here the ep has the address, does it hold
 975                  * the tcb?
 976                  */
 977
 978                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
 979                 if (stcb == NULL) {
 980                         SCTP_INP_RUNLOCK(inp);
 981                         continue;
 982                 }
 983                 SCTP_TCB_LOCK(stcb);
 984                 if (stcb->rport != rport) {
 985                         /* remote port does not match. */
 986                         SCTP_TCB_UNLOCK(stcb);
 987                         SCTP_INP_RUNLOCK(inp);
 988                         continue;
 989                 }
 990                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
 991                         SCTP_TCB_UNLOCK(stcb);
 992                         SCTP_INP_RUNLOCK(inp);
 993                         continue;
 994                 }
 995                 /* Does this TCB have a matching address? */
 996                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
 997
 998                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
 999                                 /* not the same family, can't be a match */
1000                                 continue;
1001                         }
1002                         switch (from->sa_family) {
1003 #ifdef INET
1004                         case AF_INET:
1005                                 {
1006                                         struct sockaddr_in *sin, *rsin;
1007
1008                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1009                                         rsin = (struct sockaddr_in *)from;
1010                                         if (sin->sin_addr.s_addr ==
1011                                             rsin->sin_addr.s_addr) {
1012                                                 /* found it */
1013                                                 if (netp != NULL) {
1014                                                         *netp = net;
1015                                                 }
1016                                                 /*
1017                                                  * Update the endpoint
1018                                                  * pointer
1019                                                  */
1020                                                 *inp_p = inp;
1021                                                 SCTP_INP_RUNLOCK(inp);
1022                                                 return (stcb);
1023                                         }
1024                                         break;
1025                                 }
1026 #endif
1027 #ifdef INET6
1028                         case AF_INET6:
1029                                 {
1030                                         struct sockaddr_in6 *sin6, *rsin6;
1031
1032                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1033                                         rsin6 = (struct sockaddr_in6 *)from;
1034                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1035                                             rsin6)) {
1036                                                 /* found it */
1037                                                 if (netp != NULL) {
1038                                                         *netp = net;
1039                                                 }
1040                                                 /*
1041                                                  * Update the endpoint
1042                                                  * pointer
1043                                                  */
1044                                                 *inp_p = inp;
1045                                                 SCTP_INP_RUNLOCK(inp);
1046                                                 return (stcb);
1047                                         }
1048                                         break;
1049                                 }
1050 #endif
1051                         default:
1052                                 /* TSNH */
1053                                 break;
1054                         }
1055                 }
1056                 SCTP_TCB_UNLOCK(stcb);
1057                 SCTP_INP_RUNLOCK(inp);
1058         }
1059         return (NULL);
1060 }
1061
1062 static int
1063 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
1064 {
1065         int loopback_scope, ipv4_local_scope, local_scope, site_scope;
1066         int ipv4_addr_legal, ipv6_addr_legal;
1067         struct sctp_vrf *vrf;
1068         struct sctp_ifn *sctp_ifn;
1069         struct sctp_ifa *sctp_ifa;
1070
1071         loopback_scope = stcb->asoc.loopback_scope;
1072         ipv4_local_scope = stcb->asoc.ipv4_local_scope;
1073         local_scope = stcb->asoc.local_scope;
1074         site_scope = stcb->asoc.site_scope;
1075         ipv4_addr_legal = ipv6_addr_legal = 0;
1076         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1077                 ipv6_addr_legal = 1;
1078                 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
1079                         ipv4_addr_legal = 1;
1080                 }
1081         } else {
1082                 ipv4_addr_legal = 1;
1083         }
1084
1085         SCTP_IPI_ADDR_RLOCK();
1086         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
1087         if (vrf == NULL) {
1088                 /* no vrf, no addresses */
1089                 SCTP_IPI_ADDR_RUNLOCK();
1090                 return (0);
1091         }
1092         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
1093                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
1094                         if ((loopback_scope == 0) &&
1095                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
1096                                 continue;
1097                         }
1098                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
1099                                 if (sctp_is_addr_restricted(stcb, sctp_ifa))
1100                                         continue;
1101                                 switch (sctp_ifa->address.sa.sa_family) {
1102 #ifdef INET
1103                                 case AF_INET:
1104                                         if (ipv4_addr_legal) {
1105                                                 struct sockaddr_in *sin,
1106                                                            *rsin;
1107
1108                                                 sin = &sctp_ifa->address.sin;
1109                                                 rsin = (struct sockaddr_in *)to;
1110                                                 if ((ipv4_local_scope == 0) &&
1111                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
1112                                                         continue;
1113                                                 }
1114                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1115                                                         SCTP_IPI_ADDR_RUNLOCK();
1116                                                         return (1);
1117                                                 }
1118                                         }
1119                                         break;
1120 #endif
1121 #ifdef INET6
1122                                 case AF_INET6:
1123                                         if (ipv6_addr_legal) {
1124                                                 struct sockaddr_in6 *sin6,
1125                                                             *rsin6;
1126
1127                                                 sin6 = &sctp_ifa->address.sin6;
1128                                                 rsin6 = (struct sockaddr_in6 *)to;
1129                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
1130                                                         if (local_scope == 0)
1131                                                                 continue;
1132                                                         if (sin6->sin6_scope_id == 0) {
1133                                                                 if (sa6_recoverscope(sin6) != 0)
1134                                                                         continue;
1135                                                         }
1136                                                 }
1137                                                 if ((site_scope == 0) &&
1138                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1139                                                         continue;
1140                                                 }
1141                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1142                                                         SCTP_IPI_ADDR_RUNLOCK();
1143                                                         return (1);
1144                                                 }
1145                                         }
1146                                         break;
1147 #endif
1148                                 default:
1149                                         /* TSNH */
1150                                         break;
1151                                 }
1152                         }
1153                 }
1154         } else {
1155                 struct sctp_laddr *laddr;
1156
1157                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
1158                         if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
1159                                 continue;
1160                         }
1161                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
1162                                 continue;
1163                         }
1164                         switch (to->sa_family) {
1165 #ifdef INET
1166                         case AF_INET:
1167                                 {
1168                                         struct sockaddr_in *sin, *rsin;
1169
1170                                         sin = (struct sockaddr_in *)&laddr->ifa->address.sin;
1171                                         rsin = (struct sockaddr_in *)to;
1172                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
1173                                                 SCTP_IPI_ADDR_RUNLOCK();
1174                                                 return (1);
1175                                         }
1176                                         break;
1177                                 }
1178 #endif
1179 #ifdef INET6
1180                         case AF_INET6:
1181                                 {
1182                                         struct sockaddr_in6 *sin6, *rsin6;
1183
1184                                         sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6;
1185                                         rsin6 = (struct sockaddr_in6 *)to;
1186                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
1187                                                 SCTP_IPI_ADDR_RUNLOCK();
1188                                                 return (1);
1189                                         }
1190                                         break;
1191                                 }
1192
1193 #endif
1194                         default:
1195                                 /* TSNH */
1196                                 break;
1197                         }
1198
1199                 }
1200         }
1201         SCTP_IPI_ADDR_RUNLOCK();
1202         return (0);
1203 }
1204
1205 /*
1206  * rules for use
1207  *
1208  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1209  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1210  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1211  * NULL.
1212  */
1213
1214 struct sctp_tcb *
1215 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1216     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1217 {
1218         struct sctpasochead *head;
1219         struct sctp_inpcb *inp;
1220         struct sctp_tcb *stcb = NULL;
1221         struct sctp_nets *net;
1222         uint16_t rport;
1223
1224         inp = *inp_p;
1225         if (remote->sa_family == AF_INET) {
1226                 rport = (((struct sockaddr_in *)remote)->sin_port);
1227         } else if (remote->sa_family == AF_INET6) {
1228                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1229         } else {
1230                 return (NULL);
1231         }
1232         if (locked_tcb) {
1233                 /*
1234                  * UN-lock so we can do proper locking here this occurs when
1235                  * called from load_addresses_from_init.
1236                  */
1237                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1238                 SCTP_TCB_UNLOCK(locked_tcb);
1239         }
1240         SCTP_INP_INFO_RLOCK();
1241         if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
1242                 /*-
1243                  * Now either this guy is our listener or it's the
1244                  * connector. If it is the one that issued the connect, then
1245                  * it's only chance is to be the first TCB in the list. If
1246                  * it is the acceptor, then do the special_lookup to hash
1247                  * and find the real inp.
1248                  */
1249                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1250                         /* to is peer addr, from is my addr */
1251                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1252                             netp, inp->def_vrf_id);
1253                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1254                                 /* we have a locked tcb, lower refcount */
1255                                 SCTP_INP_DECR_REF(inp);
1256                         }
1257                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1258                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1259                                 SCTP_TCB_LOCK(locked_tcb);
1260                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1261                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1262                         }
1263                         SCTP_INP_INFO_RUNLOCK();
1264                         return (stcb);
1265                 } else {
1266                         SCTP_INP_WLOCK(inp);
1267                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1268                                 goto null_return;
1269                         }
1270                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1271                         if (stcb == NULL) {
1272                                 goto null_return;
1273                         }
1274                         SCTP_TCB_LOCK(stcb);
1275
1276                         if (stcb->rport != rport) {
1277                                 /* remote port does not match. */
1278                                 SCTP_TCB_UNLOCK(stcb);
1279                                 goto null_return;
1280                         }
1281                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1282                                 SCTP_TCB_UNLOCK(stcb);
1283                                 goto null_return;
1284                         }
1285                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1286                                 SCTP_TCB_UNLOCK(stcb);
1287                                 goto null_return;
1288                         }
1289                         /* now look at the list of remote addresses */
1290                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1291 #ifdef INVARIANTS
1292                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1293                                         panic("Corrupt net list");
1294                                 }
1295 #endif
1296                                 if (net->ro._l_addr.sa.sa_family !=
1297                                     remote->sa_family) {
1298                                         /* not the same family */
1299                                         continue;
1300                                 }
1301                                 switch (remote->sa_family) {
1302 #ifdef INET
1303                                 case AF_INET:
1304                                         {
1305                                                 struct sockaddr_in *sin,
1306                                                            *rsin;
1307
1308                                                 sin = (struct sockaddr_in *)
1309                                                     &net->ro._l_addr;
1310                                                 rsin = (struct sockaddr_in *)remote;
1311                                                 if (sin->sin_addr.s_addr ==
1312                                                     rsin->sin_addr.s_addr) {
1313                                                         /* found it */
1314                                                         if (netp != NULL) {
1315                                                                 *netp = net;
1316                                                         }
1317                                                         if (locked_tcb == NULL) {
1318                                                                 SCTP_INP_DECR_REF(inp);
1319                                                         } else if (locked_tcb != stcb) {
1320                                                                 SCTP_TCB_LOCK(locked_tcb);
1321                                                         }
1322                                                         if (locked_tcb) {
1323                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1324                                                         }
1325                                                         SCTP_INP_WUNLOCK(inp);
1326                                                         SCTP_INP_INFO_RUNLOCK();
1327                                                         return (stcb);
1328                                                 }
1329                                                 break;
1330                                         }
1331 #endif
1332 #ifdef INET6
1333                                 case AF_INET6:
1334                                         {
1335                                                 struct sockaddr_in6 *sin6,
1336                                                             *rsin6;
1337
1338                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1339                                                 rsin6 = (struct sockaddr_in6 *)remote;
1340                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1341                                                     rsin6)) {
1342                                                         /* found it */
1343                                                         if (netp != NULL) {
1344                                                                 *netp = net;
1345                                                         }
1346                                                         if (locked_tcb == NULL) {
1347                                                                 SCTP_INP_DECR_REF(inp);
1348                                                         } else if (locked_tcb != stcb) {
1349                                                                 SCTP_TCB_LOCK(locked_tcb);
1350                                                         }
1351                                                         if (locked_tcb) {
1352                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1353                                                         }
1354                                                         SCTP_INP_WUNLOCK(inp);
1355                                                         SCTP_INP_INFO_RUNLOCK();
1356                                                         return (stcb);
1357                                                 }
1358                                                 break;
1359                                         }
1360 #endif
1361                                 default:
1362                                         /* TSNH */
1363                                         break;
1364                                 }
1365                         }
1366                         SCTP_TCB_UNLOCK(stcb);
1367                 }
1368         } else {
1369                 SCTP_INP_WLOCK(inp);
1370                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1371                         goto null_return;
1372                 }
1373                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1374                     inp->sctp_hashmark)];
1375                 if (head == NULL) {
1376                         goto null_return;
1377                 }
1378                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1379                         if (stcb->rport != rport) {
1380                                 /* remote port does not match */
1381                                 continue;
1382                         }
1383                         SCTP_TCB_LOCK(stcb);
1384                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1385                                 SCTP_TCB_UNLOCK(stcb);
1386                                 continue;
1387                         }
1388                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1389                                 SCTP_TCB_UNLOCK(stcb);
1390                                 continue;
1391                         }
1392                         /* now look at the list of remote addresses */
1393                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1394 #ifdef INVARIANTS
1395                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1396                                         panic("Corrupt net list");
1397                                 }
1398 #endif
1399                                 if (net->ro._l_addr.sa.sa_family !=
1400                                     remote->sa_family) {
1401                                         /* not the same family */
1402                                         continue;
1403                                 }
1404                                 switch (remote->sa_family) {
1405 #ifdef INET
1406                                 case AF_INET:
1407                                         {
1408                                                 struct sockaddr_in *sin,
1409                                                            *rsin;
1410
1411                                                 sin = (struct sockaddr_in *)
1412                                                     &net->ro._l_addr;
1413                                                 rsin = (struct sockaddr_in *)remote;
1414                                                 if (sin->sin_addr.s_addr ==
1415                                                     rsin->sin_addr.s_addr) {
1416                                                         /* found it */
1417                                                         if (netp != NULL) {
1418                                                                 *netp = net;
1419                                                         }
1420                                                         if (locked_tcb == NULL) {
1421                                                                 SCTP_INP_DECR_REF(inp);
1422                                                         } else if (locked_tcb != stcb) {
1423                                                                 SCTP_TCB_LOCK(locked_tcb);
1424                                                         }
1425                                                         if (locked_tcb) {
1426                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1427                                                         }
1428                                                         SCTP_INP_WUNLOCK(inp);
1429                                                         SCTP_INP_INFO_RUNLOCK();
1430                                                         return (stcb);
1431                                                 }
1432                                                 break;
1433                                         }
1434 #endif
1435 #ifdef INET6
1436                                 case AF_INET6:
1437                                         {
1438                                                 struct sockaddr_in6 *sin6,
1439                                                             *rsin6;
1440
1441                                                 sin6 = (struct sockaddr_in6 *)
1442                                                     &net->ro._l_addr;
1443                                                 rsin6 = (struct sockaddr_in6 *)remote;
1444                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1445                                                     rsin6)) {
1446                                                         /* found it */
1447                                                         if (netp != NULL) {
1448                                                                 *netp = net;
1449                                                         }
1450                                                         if (locked_tcb == NULL) {
1451                                                                 SCTP_INP_DECR_REF(inp);
1452                                                         } else if (locked_tcb != stcb) {
1453                                                                 SCTP_TCB_LOCK(locked_tcb);
1454                                                         }
1455                                                         if (locked_tcb) {
1456                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1457                                                         }
1458                                                         SCTP_INP_WUNLOCK(inp);
1459                                                         SCTP_INP_INFO_RUNLOCK();
1460                                                         return (stcb);
1461                                                 }
1462                                                 break;
1463                                         }
1464 #endif
1465                                 default:
1466                                         /* TSNH */
1467                                         break;
1468                                 }
1469                         }
1470                         SCTP_TCB_UNLOCK(stcb);
1471                 }
1472         }
1473 null_return:
1474         /* clean up for returning null */
1475         if (locked_tcb) {
1476                 SCTP_TCB_LOCK(locked_tcb);
1477                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1478         }
1479         SCTP_INP_WUNLOCK(inp);
1480         SCTP_INP_INFO_RUNLOCK();
1481         /* not found */
1482         return (NULL);
1483 }
1484
1485 /*
1486  * Find an association for a specific endpoint using the association id given
1487  * out in the COMM_UP notification
1488  */
1489
1490 struct sctp_tcb *
1491 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1492 {
1493         /*
1494          * Use my the assoc_id to find a endpoint
1495          */
1496         struct sctpasochead *head;
1497         struct sctp_tcb *stcb;
1498         uint32_t id;
1499
1500         if (inp == NULL) {
1501                 SCTP_PRINTF("TSNH ep_associd\n");
1502                 return (NULL);
1503         }
1504         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1505                 SCTP_PRINTF("TSNH ep_associd0\n");
1506                 return (NULL);
1507         }
1508         id = (uint32_t) asoc_id;
1509         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1510         if (head == NULL) {
1511                 /* invalid id TSNH */
1512                 SCTP_PRINTF("TSNH ep_associd1\n");
1513                 return (NULL);
1514         }
1515         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1516                 if (stcb->asoc.assoc_id == id) {
1517                         if (inp != stcb->sctp_ep) {
1518                                 /*
1519                                  * some other guy has the same id active (id
1520                                  * collision ??).
1521                                  */
1522                                 SCTP_PRINTF("TSNH ep_associd2\n");
1523                                 continue;
1524                         }
1525                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1526                                 continue;
1527                         }
1528                         if (want_lock) {
1529                                 SCTP_TCB_LOCK(stcb);
1530                         }
1531                         return (stcb);
1532                 }
1533         }
1534         return (NULL);
1535 }
1536
1537
1538 struct sctp_tcb *
1539 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1540 {
1541         struct sctp_tcb *stcb;
1542
1543         SCTP_INP_RLOCK(inp);
1544         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1545         SCTP_INP_RUNLOCK(inp);
1546         return (stcb);
1547 }
1548
1549
1550 static struct sctp_inpcb *
1551 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1552     uint16_t lport, uint32_t vrf_id)
1553 {
1554         struct sctp_inpcb *inp;
1555         struct sctp_laddr *laddr;
1556
1557 #ifdef INET
1558         struct sockaddr_in *sin;
1559
1560 #endif
1561 #ifdef INET6
1562         struct sockaddr_in6 *sin6;
1563         struct sockaddr_in6 *intf_addr6;
1564
1565 #endif
1566
1567         int fnd;
1568
1569         /*
1570          * Endpoint probe expects that the INP_INFO is locked.
1571          */
1572 #ifdef INET
1573         sin = NULL;
1574 #endif
1575 #ifdef INET6
1576         sin6 = NULL;
1577 #endif
1578         switch (nam->sa_family) {
1579 #ifdef INET
1580         case AF_INET:
1581                 sin = (struct sockaddr_in *)nam;
1582                 break;
1583 #endif
1584 #ifdef INET6
1585         case AF_INET6:
1586                 sin6 = (struct sockaddr_in6 *)nam;
1587                 break;
1588 #endif
1589         default:
1590                 /* unsupported family */
1591                 return (NULL);
1592         }
1593
1594         if (head == NULL)
1595                 return (NULL);
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                     (inp->sctp_lport == lport)) {
1605                         /* got it */
1606 #ifdef INET
1607                         if ((nam->sa_family == AF_INET) &&
1608                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1609                             SCTP_IPV6_V6ONLY(inp)) {
1610                                 /* IPv4 on a IPv6 socket with ONLY IPv6 set */
1611                                 SCTP_INP_RUNLOCK(inp);
1612                                 continue;
1613                         }
1614 #endif
1615 #ifdef INET6
1616                         /* A V6 address and the endpoint is NOT bound V6 */
1617                         if (nam->sa_family == AF_INET6 &&
1618                             (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1619                                 SCTP_INP_RUNLOCK(inp);
1620                                 continue;
1621                         }
1622 #endif
1623                         /* does a VRF id match? */
1624                         fnd = 0;
1625                         if (inp->def_vrf_id == vrf_id)
1626                                 fnd = 1;
1627
1628                         SCTP_INP_RUNLOCK(inp);
1629                         if (!fnd)
1630                                 continue;
1631                         return (inp);
1632                 }
1633                 SCTP_INP_RUNLOCK(inp);
1634         }
1635         switch (nam->sa_family) {
1636 #ifdef INET
1637         case AF_INET:
1638                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1639                         /* Can't hunt for one that has no address specified */
1640                         return (NULL);
1641                 }
1642                 break;
1643 #endif
1644 #ifdef INET6
1645         case AF_INET6:
1646                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1647                         /* Can't hunt for one that has no address specified */
1648                         return (NULL);
1649                 }
1650                 break;
1651 #endif
1652         default:
1653                 break;
1654         }
1655         /*
1656          * ok, not bound to all so see if we can find a EP bound to this
1657          * address.
1658          */
1659         LIST_FOREACH(inp, head, sctp_hash) {
1660                 SCTP_INP_RLOCK(inp);
1661                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1662                         SCTP_INP_RUNLOCK(inp);
1663                         continue;
1664                 }
1665                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1666                         SCTP_INP_RUNLOCK(inp);
1667                         continue;
1668                 }
1669                 /*
1670                  * Ok this could be a likely candidate, look at all of its
1671                  * addresses
1672                  */
1673                 if (inp->sctp_lport != lport) {
1674                         SCTP_INP_RUNLOCK(inp);
1675                         continue;
1676                 }
1677                 /* does a VRF id match? */
1678                 fnd = 0;
1679                 if (inp->def_vrf_id == vrf_id)
1680                         fnd = 1;
1681
1682                 if (!fnd) {
1683                         SCTP_INP_RUNLOCK(inp);
1684                         continue;
1685                 }
1686                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1687                         if (laddr->ifa == NULL) {
1688                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1689                                     __FUNCTION__);
1690                                 continue;
1691                         }
1692                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1693                             laddr->ifa);
1694                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1695                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1696                                 continue;
1697                         }
1698                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1699                                 /* possible, see if it matches */
1700                                 switch (nam->sa_family) {
1701 #ifdef INET
1702                                 case AF_INET:
1703                                         if (sin->sin_addr.s_addr ==
1704                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1705                                                 SCTP_INP_RUNLOCK(inp);
1706                                                 return (inp);
1707                                         }
1708                                         break;
1709 #endif
1710 #ifdef INET6
1711                                 case AF_INET6:
1712                                         intf_addr6 = &laddr->ifa->address.sin6;
1713                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1714                                             intf_addr6)) {
1715                                                 SCTP_INP_RUNLOCK(inp);
1716                                                 return (inp);
1717                                         }
1718                                         break;
1719 #endif
1720                                 }
1721                         }
1722                 }
1723                 SCTP_INP_RUNLOCK(inp);
1724         }
1725         return (NULL);
1726 }
1727
1728
1729 static struct sctp_inpcb *
1730 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1731 {
1732         struct sctppcbhead *head;
1733         struct sctp_inpcb *t_inp;
1734         int fnd;
1735
1736         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1737             SCTP_BASE_INFO(hashmark))];
1738         LIST_FOREACH(t_inp, head, sctp_hash) {
1739                 if (t_inp->sctp_lport != lport) {
1740                         continue;
1741                 }
1742                 /* is it in the VRF in question */
1743                 fnd = 0;
1744                 if (t_inp->def_vrf_id == vrf_id)
1745                         fnd = 1;
1746                 if (!fnd)
1747                         continue;
1748
1749                 /* This one is in use. */
1750                 /* check the v6/v4 binding issue */
1751                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1752                     SCTP_IPV6_V6ONLY(t_inp)) {
1753                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1754                                 /* collision in V6 space */
1755                                 return (t_inp);
1756                         } else {
1757                                 /* inp is BOUND_V4 no conflict */
1758                                 continue;
1759                         }
1760                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1761                         /* t_inp is bound v4 and v6, conflict always */
1762                         return (t_inp);
1763                 } else {
1764                         /* t_inp is bound only V4 */
1765                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1766                             SCTP_IPV6_V6ONLY(inp)) {
1767                                 /* no conflict */
1768                                 continue;
1769                         }
1770                         /* else fall through to conflict */
1771                 }
1772                 return (t_inp);
1773         }
1774         return (NULL);
1775 }
1776
1777
1778 int
1779 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1780 {
1781         /* For 1-2-1 with port reuse */
1782         struct sctppcbhead *head;
1783         struct sctp_inpcb *tinp;
1784
1785         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1786                 /* only works with port reuse on */
1787                 return (-1);
1788         }
1789         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1790                 return (0);
1791         }
1792         SCTP_INP_RUNLOCK(inp);
1793         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1794             SCTP_BASE_INFO(hashmark))];
1795         /* Kick out all non-listeners to the TCP hash */
1796         LIST_FOREACH(tinp, head, sctp_hash) {
1797                 if (tinp->sctp_lport != inp->sctp_lport) {
1798                         continue;
1799                 }
1800                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1801                         continue;
1802                 }
1803                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1804                         continue;
1805                 }
1806                 if (tinp->sctp_socket->so_qlimit) {
1807                         continue;
1808                 }
1809                 SCTP_INP_WLOCK(tinp);
1810                 LIST_REMOVE(tinp, sctp_hash);
1811                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1812                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1813                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1814                 SCTP_INP_WUNLOCK(tinp);
1815         }
1816         SCTP_INP_WLOCK(inp);
1817         /* Pull from where he was */
1818         LIST_REMOVE(inp, sctp_hash);
1819         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1820         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1821         LIST_INSERT_HEAD(head, inp, sctp_hash);
1822         SCTP_INP_WUNLOCK(inp);
1823         SCTP_INP_RLOCK(inp);
1824         return (0);
1825 }
1826
1827
1828 struct sctp_inpcb *
1829 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1830     uint32_t vrf_id)
1831 {
1832         /*
1833          * First we check the hash table to see if someone has this port
1834          * bound with just the port.
1835          */
1836         struct sctp_inpcb *inp;
1837         struct sctppcbhead *head;
1838         int lport;
1839         unsigned int i;
1840
1841 #ifdef INET
1842         struct sockaddr_in *sin;
1843
1844 #endif
1845 #ifdef INET6
1846         struct sockaddr_in6 *sin6;
1847
1848 #endif
1849
1850         switch (nam->sa_family) {
1851 #ifdef INET
1852         case AF_INET:
1853                 sin = (struct sockaddr_in *)nam;
1854                 lport = ((struct sockaddr_in *)nam)->sin_port;
1855                 break;
1856 #endif
1857 #ifdef INET6
1858         case AF_INET6:
1859                 sin6 = (struct sockaddr_in6 *)nam;
1860                 lport = ((struct sockaddr_in6 *)nam)->sin6_port;
1861                 break;
1862 #endif
1863         default:
1864                 return (NULL);
1865         }
1866         /*
1867          * I could cheat here and just cast to one of the types but we will
1868          * do it right. It also provides the check against an Unsupported
1869          * type too.
1870          */
1871         /* Find the head of the ALLADDR chain */
1872         if (have_lock == 0) {
1873                 SCTP_INP_INFO_RLOCK();
1874         }
1875         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1876             SCTP_BASE_INFO(hashmark))];
1877         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1878
1879         /*
1880          * If the TCP model exists it could be that the main listening
1881          * endpoint is gone but there still exists a connected socket for
1882          * this guy. If so we can return the first one that we find. This
1883          * may NOT be the correct one so the caller should be wary on the
1884          * returned INP. Currently the only caller that sets find_tcp_pool
1885          * is in bindx where we are verifying that a user CAN bind the
1886          * address. He either has bound it already, or someone else has, or
1887          * its open to bind, so this is good enough.
1888          */
1889         if (inp == NULL && find_tcp_pool) {
1890                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1891                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1892                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1893                         if (inp) {
1894                                 break;
1895                         }
1896                 }
1897         }
1898         if (inp) {
1899                 SCTP_INP_INCR_REF(inp);
1900         }
1901         if (have_lock == 0) {
1902                 SCTP_INP_INFO_RUNLOCK();
1903         }
1904         return (inp);
1905 }
1906
1907 /*
1908  * Find an association for an endpoint with the pointer to whom you want to
1909  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1910  * need to change the *to to some other struct like a mbuf...
1911  */
1912 struct sctp_tcb *
1913 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
1914     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
1915     uint32_t vrf_id)
1916 {
1917         struct sctp_inpcb *inp = NULL;
1918         struct sctp_tcb *retval;
1919
1920         SCTP_INP_INFO_RLOCK();
1921         if (find_tcp_pool) {
1922                 if (inp_p != NULL) {
1923                         retval = sctp_tcb_special_locate(inp_p, from, to, netp,
1924                             vrf_id);
1925                 } else {
1926                         retval = sctp_tcb_special_locate(&inp, from, to, netp,
1927                             vrf_id);
1928                 }
1929                 if (retval != NULL) {
1930                         SCTP_INP_INFO_RUNLOCK();
1931                         return (retval);
1932                 }
1933         }
1934         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
1935         if (inp_p != NULL) {
1936                 *inp_p = inp;
1937         }
1938         SCTP_INP_INFO_RUNLOCK();
1939
1940         if (inp == NULL) {
1941                 return (NULL);
1942         }
1943         /*
1944          * ok, we have an endpoint, now lets find the assoc for it (if any)
1945          * we now place the source address or from in the to of the find
1946          * endpoint call. Since in reality this chain is used from the
1947          * inbound packet side.
1948          */
1949         if (inp_p != NULL) {
1950                 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
1951                     NULL);
1952         } else {
1953                 retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
1954                     NULL);
1955         }
1956         return retval;
1957 }
1958
1959
1960 /*
1961  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
1962  * find all addresses that the sender has specified in any address list. Each
1963  * address will be used to lookup the TCB and see if one exits.
1964  */
1965 static struct sctp_tcb *
1966 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
1967     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
1968     struct sockaddr *dest)
1969 {
1970         struct sctp_paramhdr *phdr, parm_buf;
1971         struct sctp_tcb *retval;
1972         uint32_t ptype, plen;
1973
1974 #ifdef INET
1975         struct sockaddr_in sin4;
1976
1977 #endif
1978 #ifdef INET6
1979         struct sockaddr_in6 sin6;
1980
1981 #endif
1982
1983 #ifdef INET
1984         memset(&sin4, 0, sizeof(sin4));
1985         sin4.sin_len = sizeof(sin4);
1986         sin4.sin_family = AF_INET;
1987         sin4.sin_port = sh->src_port;
1988 #endif
1989 #ifdef INET6
1990         memset(&sin6, 0, sizeof(sin6));
1991         sin6.sin6_len = sizeof(sin6);
1992         sin6.sin6_family = AF_INET6;
1993         sin6.sin6_port = sh->src_port;
1994 #endif
1995
1996         retval = NULL;
1997         offset += sizeof(struct sctp_init_chunk);
1998
1999         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2000         while (phdr != NULL) {
2001                 /* now we must see if we want the parameter */
2002                 ptype = ntohs(phdr->param_type);
2003                 plen = ntohs(phdr->param_length);
2004                 if (plen == 0) {
2005                         break;
2006                 }
2007 #ifdef INET
2008                 if (ptype == SCTP_IPV4_ADDRESS &&
2009                     plen == sizeof(struct sctp_ipv4addr_param)) {
2010                         /* Get the rest of the address */
2011                         struct sctp_ipv4addr_param ip4_parm, *p4;
2012
2013                         phdr = sctp_get_next_param(m, offset,
2014                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2015                         if (phdr == NULL) {
2016                                 return (NULL);
2017                         }
2018                         p4 = (struct sctp_ipv4addr_param *)phdr;
2019                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2020                         /* look it up */
2021                         retval = sctp_findassociation_ep_addr(inp_p,
2022                             (struct sockaddr *)&sin4, netp, dest, NULL);
2023                         if (retval != NULL) {
2024                                 return (retval);
2025                         }
2026                 }
2027 #endif
2028 #ifdef INET6
2029                 if (ptype == SCTP_IPV6_ADDRESS &&
2030                     plen == sizeof(struct sctp_ipv6addr_param)) {
2031                         /* Get the rest of the address */
2032                         struct sctp_ipv6addr_param ip6_parm, *p6;
2033
2034                         phdr = sctp_get_next_param(m, offset,
2035                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2036                         if (phdr == NULL) {
2037                                 return (NULL);
2038                         }
2039                         p6 = (struct sctp_ipv6addr_param *)phdr;
2040                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2041                         /* look it up */
2042                         retval = sctp_findassociation_ep_addr(inp_p,
2043                             (struct sockaddr *)&sin6, netp, dest, NULL);
2044                         if (retval != NULL) {
2045                                 return (retval);
2046                         }
2047                 }
2048 #endif
2049                 offset += SCTP_SIZE32(plen);
2050                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2051                     sizeof(parm_buf));
2052         }
2053         return (NULL);
2054 }
2055
2056 static struct sctp_tcb *
2057 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2058     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2059     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2060 {
2061         /*
2062          * Use my vtag to hash. If we find it we then verify the source addr
2063          * is in the assoc. If all goes well we save a bit on rec of a
2064          * packet.
2065          */
2066         struct sctpasochead *head;
2067         struct sctp_nets *net;
2068         struct sctp_tcb *stcb;
2069
2070         *netp = NULL;
2071         *inp_p = NULL;
2072         SCTP_INP_INFO_RLOCK();
2073         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2074             SCTP_BASE_INFO(hashasocmark))];
2075         if (head == NULL) {
2076                 /* invalid vtag */
2077                 SCTP_INP_INFO_RUNLOCK();
2078                 return (NULL);
2079         }
2080         LIST_FOREACH(stcb, head, sctp_asocs) {
2081                 SCTP_INP_RLOCK(stcb->sctp_ep);
2082                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2083                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2084                         continue;
2085                 }
2086                 SCTP_TCB_LOCK(stcb);
2087                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2088                 if (stcb->asoc.my_vtag == vtag) {
2089                         /* candidate */
2090                         if (stcb->rport != rport) {
2091                                 SCTP_TCB_UNLOCK(stcb);
2092                                 continue;
2093                         }
2094                         if (stcb->sctp_ep->sctp_lport != lport) {
2095                                 SCTP_TCB_UNLOCK(stcb);
2096                                 continue;
2097                         }
2098                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2099                                 SCTP_TCB_UNLOCK(stcb);
2100                                 continue;
2101                         }
2102                         /* RRS:Need toaddr check here */
2103                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2104                                 /* Endpoint does not own this address */
2105                                 SCTP_TCB_UNLOCK(stcb);
2106                                 continue;
2107                         }
2108                         if (remote_tag) {
2109                                 /*
2110                                  * If we have both vtags that's all we match
2111                                  * on
2112                                  */
2113                                 if (stcb->asoc.peer_vtag == remote_tag) {
2114                                         /*
2115                                          * If both tags match we consider it
2116                                          * conclusive and check NO
2117                                          * source/destination addresses
2118                                          */
2119                                         goto conclusive;
2120                                 }
2121                         }
2122                         if (skip_src_check) {
2123                 conclusive:
2124                                 if (from) {
2125                                         net = sctp_findnet(stcb, from);
2126                                 } else {
2127                                         *netp = NULL;   /* unknown */
2128                                 }
2129                                 if (inp_p)
2130                                         *inp_p = stcb->sctp_ep;
2131                                 SCTP_INP_INFO_RUNLOCK();
2132                                 return (stcb);
2133                         }
2134                         net = sctp_findnet(stcb, from);
2135                         if (net) {
2136                                 /* yep its him. */
2137                                 *netp = net;
2138                                 SCTP_STAT_INCR(sctps_vtagexpress);
2139                                 *inp_p = stcb->sctp_ep;
2140                                 SCTP_INP_INFO_RUNLOCK();
2141                                 return (stcb);
2142                         } else {
2143                                 /*
2144                                  * not him, this should only happen in rare
2145                                  * cases so I peg it.
2146                                  */
2147                                 SCTP_STAT_INCR(sctps_vtagbogus);
2148                         }
2149                 }
2150                 SCTP_TCB_UNLOCK(stcb);
2151         }
2152         SCTP_INP_INFO_RUNLOCK();
2153         return (NULL);
2154 }
2155
2156 /*
2157  * Find an association with the pointer to the inbound IP packet. This can be
2158  * a IPv4 or IPv6 packet.
2159  */
2160 struct sctp_tcb *
2161 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset,
2162     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2163     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2164 {
2165         int find_tcp_pool;
2166         struct ip *iph;
2167         struct sctp_tcb *retval;
2168         struct sockaddr_storage to_store, from_store;
2169         struct sockaddr *to = (struct sockaddr *)&to_store;
2170         struct sockaddr *from = (struct sockaddr *)&from_store;
2171         struct sctp_inpcb *inp;
2172
2173         iph = mtod(m, struct ip *);
2174         switch (iph->ip_v) {
2175 #ifdef INET
2176         case IPVERSION:
2177                 {
2178                         /* its IPv4 */
2179                         struct sockaddr_in *from4;
2180
2181                         from4 = (struct sockaddr_in *)&from_store;
2182                         bzero(from4, sizeof(*from4));
2183                         from4->sin_family = AF_INET;
2184                         from4->sin_len = sizeof(struct sockaddr_in);
2185                         from4->sin_addr.s_addr = iph->ip_src.s_addr;
2186                         from4->sin_port = sh->src_port;
2187                         break;
2188                 }
2189 #endif
2190 #ifdef INET6
2191         case IPV6_VERSION >> 4:
2192                 {
2193                         /* its IPv6 */
2194                         struct ip6_hdr *ip6;
2195                         struct sockaddr_in6 *from6;
2196
2197                         ip6 = mtod(m, struct ip6_hdr *);
2198                         from6 = (struct sockaddr_in6 *)&from_store;
2199                         bzero(from6, sizeof(*from6));
2200                         from6->sin6_family = AF_INET6;
2201                         from6->sin6_len = sizeof(struct sockaddr_in6);
2202                         from6->sin6_addr = ip6->ip6_src;
2203                         from6->sin6_port = sh->src_port;
2204                         /* Get the scopes in properly to the sin6 addr's */
2205                         /* we probably don't need these operations */
2206                         (void)sa6_recoverscope(from6);
2207                         sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone));
2208                         break;
2209                 }
2210 #endif
2211         default:
2212                 /* Currently not supported. */
2213                 return (NULL);
2214         }
2215
2216
2217         switch (iph->ip_v) {
2218 #ifdef INET
2219         case IPVERSION:
2220                 {
2221                         /* its IPv4 */
2222                         struct sockaddr_in *to4;
2223
2224                         to4 = (struct sockaddr_in *)&to_store;
2225                         bzero(to4, sizeof(*to4));
2226                         to4->sin_family = AF_INET;
2227                         to4->sin_len = sizeof(struct sockaddr_in);
2228                         to4->sin_addr.s_addr = iph->ip_dst.s_addr;
2229                         to4->sin_port = sh->dest_port;
2230                         break;
2231                 }
2232 #endif
2233 #ifdef INET6
2234         case IPV6_VERSION >> 4:
2235                 {
2236                         /* its IPv6 */
2237                         struct ip6_hdr *ip6;
2238                         struct sockaddr_in6 *to6;
2239
2240                         ip6 = mtod(m, struct ip6_hdr *);
2241                         to6 = (struct sockaddr_in6 *)&to_store;
2242                         bzero(to6, sizeof(*to6));
2243                         to6->sin6_family = AF_INET6;
2244                         to6->sin6_len = sizeof(struct sockaddr_in6);
2245                         to6->sin6_addr = ip6->ip6_dst;
2246                         to6->sin6_port = sh->dest_port;
2247                         /* Get the scopes in properly to the sin6 addr's */
2248                         /* we probably don't need these operations */
2249                         (void)sa6_recoverscope(to6);
2250                         sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone));
2251                         break;
2252                 }
2253 #endif
2254         default:
2255                 /* TSNH */
2256                 break;
2257         }
2258         if (sh->v_tag) {
2259                 /* we only go down this path if vtag is non-zero */
2260                 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag),
2261                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2262                 if (retval) {
2263                         return (retval);
2264                 }
2265         }
2266         find_tcp_pool = 0;
2267         if ((ch->chunk_type != SCTP_INITIATION) &&
2268             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2269             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2270             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2271                 /* Other chunk types go to the tcp pool. */
2272                 find_tcp_pool = 1;
2273         }
2274         if (inp_p) {
2275                 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
2276                     find_tcp_pool, vrf_id);
2277                 inp = *inp_p;
2278         } else {
2279                 retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
2280                     find_tcp_pool, vrf_id);
2281         }
2282         SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
2283         if (retval == NULL && inp) {
2284                 /* Found a EP but not this address */
2285                 if ((ch->chunk_type == SCTP_INITIATION) ||
2286                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2287                         /*-
2288                          * special hook, we do NOT return linp or an
2289                          * association that is linked to an existing
2290                          * association that is under the TCP pool (i.e. no
2291                          * listener exists). The endpoint finding routine
2292                          * will always find a listener before examining the
2293                          * TCP pool.
2294                          */
2295                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2296                                 if (inp_p) {
2297                                         *inp_p = NULL;
2298                                 }
2299                                 return (NULL);
2300                         }
2301                         retval = sctp_findassociation_special_addr(m, iphlen,
2302                             offset, sh, &inp, netp, to);
2303                         if (inp_p != NULL) {
2304                                 *inp_p = inp;
2305                         }
2306                 }
2307         }
2308         SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
2309         return (retval);
2310 }
2311
2312 /*
2313  * lookup an association by an ASCONF lookup address.
2314  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2315  */
2316 struct sctp_tcb *
2317 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
2318     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2319 {
2320         struct sctp_tcb *stcb;
2321         struct sockaddr_storage local_store, remote_store;
2322         struct sockaddr *to;
2323         struct ip *iph;
2324         struct sctp_paramhdr parm_buf, *phdr;
2325         int ptype;
2326         int zero_address = 0;
2327
2328 #ifdef INET
2329         struct sockaddr_in *sin;
2330
2331 #endif
2332 #ifdef INET6
2333         struct ip6_hdr *ip6;
2334         struct sockaddr_in6 *sin6;
2335
2336 #endif
2337
2338         memset(&local_store, 0, sizeof(local_store));
2339         memset(&remote_store, 0, sizeof(remote_store));
2340         to = (struct sockaddr *)&local_store;
2341         /* First get the destination address setup too. */
2342         iph = mtod(m, struct ip *);
2343         switch (iph->ip_v) {
2344 #ifdef INET
2345         case IPVERSION:
2346                 /* its IPv4 */
2347                 sin = (struct sockaddr_in *)&local_store;
2348                 sin->sin_family = AF_INET;
2349                 sin->sin_len = sizeof(*sin);
2350                 sin->sin_port = sh->dest_port;
2351                 sin->sin_addr.s_addr = iph->ip_dst.s_addr;
2352                 break;
2353 #endif
2354 #ifdef INET6
2355         case IPV6_VERSION >> 4:
2356                 /* its IPv6 */
2357                 ip6 = mtod(m, struct ip6_hdr *);
2358                 sin6 = (struct sockaddr_in6 *)&local_store;
2359                 sin6->sin6_family = AF_INET6;
2360                 sin6->sin6_len = sizeof(*sin6);
2361                 sin6->sin6_port = sh->dest_port;
2362                 sin6->sin6_addr = ip6->ip6_dst;
2363                 break;
2364 #endif
2365         default:
2366                 return NULL;
2367         }
2368
2369         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2370             &parm_buf, sizeof(struct sctp_paramhdr));
2371         if (phdr == NULL) {
2372                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2373                     __FUNCTION__);
2374                 return NULL;
2375         }
2376         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2377         /* get the correlation address */
2378         switch (ptype) {
2379 #ifdef INET6
2380         case SCTP_IPV6_ADDRESS:
2381                 {
2382                         /* ipv6 address param */
2383                         struct sctp_ipv6addr_param *p6, p6_buf;
2384
2385                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2386                                 return NULL;
2387                         }
2388                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2389                             offset + sizeof(struct sctp_asconf_chunk),
2390                             &p6_buf.ph, sizeof(*p6));
2391                         if (p6 == NULL) {
2392                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2393                                     __FUNCTION__);
2394                                 return (NULL);
2395                         }
2396                         sin6 = (struct sockaddr_in6 *)&remote_store;
2397                         sin6->sin6_family = AF_INET6;
2398                         sin6->sin6_len = sizeof(*sin6);
2399                         sin6->sin6_port = sh->src_port;
2400                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2401                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2402                                 zero_address = 1;
2403                         break;
2404                 }
2405 #endif
2406 #ifdef INET
2407         case SCTP_IPV4_ADDRESS:
2408                 {
2409                         /* ipv4 address param */
2410                         struct sctp_ipv4addr_param *p4, p4_buf;
2411
2412                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2413                                 return NULL;
2414                         }
2415                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2416                             offset + sizeof(struct sctp_asconf_chunk),
2417                             &p4_buf.ph, sizeof(*p4));
2418                         if (p4 == NULL) {
2419                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2420                                     __FUNCTION__);
2421                                 return (NULL);
2422                         }
2423                         sin = (struct sockaddr_in *)&remote_store;
2424                         sin->sin_family = AF_INET;
2425                         sin->sin_len = sizeof(*sin);
2426                         sin->sin_port = sh->src_port;
2427                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2428                         if (sin->sin_addr.s_addr == INADDR_ANY)
2429                                 zero_address = 1;
2430                         break;
2431                 }
2432 #endif
2433         default:
2434                 /* invalid address param type */
2435                 return NULL;
2436         }
2437
2438         if (zero_address) {
2439                 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p,
2440                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2441                 /*
2442                  * printf("findassociation_ep_asconf: zero lookup address
2443                  * finds stcb 0x%x\n", (uint32_t)stcb);
2444                  */
2445         } else {
2446                 stcb = sctp_findassociation_ep_addr(inp_p,
2447                     (struct sockaddr *)&remote_store, netp,
2448                     to, NULL);
2449         }
2450         return (stcb);
2451 }
2452
2453
2454 /*
2455  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2456  * addresses. This way if we don't get a bind we by default pick a ephemeral
2457  * port with all addresses bound.
2458  */
2459 int
2460 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2461 {
2462         /*
2463          * we get called when a new endpoint starts up. We need to allocate
2464          * the sctp_inpcb structure from the zone and init it. Mark it as
2465          * unbound and find a port that we can use as an ephemeral with
2466          * INADDR_ANY. If the user binds later no problem we can then add in
2467          * the specific addresses. And setup the default parameters for the
2468          * EP.
2469          */
2470         int i, error;
2471         struct sctp_inpcb *inp;
2472         struct sctp_pcb *m;
2473         struct timeval time;
2474         sctp_sharedkey_t *null_key;
2475
2476         error = 0;
2477
2478         SCTP_INP_INFO_WLOCK();
2479         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2480         if (inp == NULL) {
2481                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2482                 SCTP_INP_INFO_WUNLOCK();
2483                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2484                 return (ENOBUFS);
2485         }
2486         /* zap it */
2487         bzero(inp, sizeof(*inp));
2488
2489         /* bump generations */
2490         /* setup socket pointers */
2491         inp->sctp_socket = so;
2492         inp->ip_inp.inp.inp_socket = so;
2493         inp->sctp_associd_counter = 1;
2494         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2495         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2496         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2497         inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable);
2498         /* init the small hash table we use to track asocid <-> tcb */
2499         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2500         if (inp->sctp_asocidhash == NULL) {
2501                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2502                 SCTP_INP_INFO_WUNLOCK();
2503                 return (ENOBUFS);
2504         }
2505 #ifdef IPSEC
2506         {
2507                 struct inpcbpolicy *pcb_sp = NULL;
2508
2509                 error = ipsec_init_policy(so, &pcb_sp);
2510                 /* Arrange to share the policy */
2511                 inp->ip_inp.inp.inp_sp = pcb_sp;
2512                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2513         }
2514         if (error != 0) {
2515                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2516                 SCTP_INP_INFO_WUNLOCK();
2517                 return error;
2518         }
2519 #endif                          /* IPSEC */
2520         SCTP_INCR_EP_COUNT();
2521         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2522         SCTP_INP_INFO_WUNLOCK();
2523
2524         so->so_pcb = (caddr_t)inp;
2525
2526         if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
2527             (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
2528                 /* UDP style socket */
2529                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2530                     SCTP_PCB_FLAGS_UNBOUND);
2531                 /* Be sure it is NON-BLOCKING IO for UDP */
2532                 /* SCTP_SET_SO_NBIO(so); */
2533         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2534                 /* TCP style socket */
2535                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2536                     SCTP_PCB_FLAGS_UNBOUND);
2537                 /* Be sure we have blocking IO by default */
2538                 SCTP_CLEAR_SO_NBIO(so);
2539         } else {
2540                 /*
2541                  * unsupported socket type (RAW, etc)- in case we missed it
2542                  * in protosw
2543                  */
2544                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2545                 so->so_pcb = NULL;
2546                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2547                 return (EOPNOTSUPP);
2548         }
2549         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2550                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2551                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2552         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2553                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2554                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2555         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2556                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2557                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2558         }
2559         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2560             &inp->sctp_hashmark);
2561         if (inp->sctp_tcbhash == NULL) {
2562                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2563                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2564                 so->so_pcb = NULL;
2565                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2566                 return (ENOBUFS);
2567         }
2568         inp->def_vrf_id = vrf_id;
2569
2570         SCTP_INP_INFO_WLOCK();
2571         SCTP_INP_LOCK_INIT(inp);
2572         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2573         SCTP_INP_READ_INIT(inp);
2574         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2575         /* lock the new ep */
2576         SCTP_INP_WLOCK(inp);
2577
2578         /* add it to the info area */
2579         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2580         SCTP_INP_INFO_WUNLOCK();
2581
2582         TAILQ_INIT(&inp->read_queue);
2583         LIST_INIT(&inp->sctp_addr_list);
2584
2585         LIST_INIT(&inp->sctp_asoc_list);
2586
2587 #ifdef SCTP_TRACK_FREED_ASOCS
2588         /* TEMP CODE */
2589         LIST_INIT(&inp->sctp_asoc_free_list);
2590 #endif
2591         /* Init the timer structure for signature change */
2592         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2593         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2594
2595         /* now init the actual endpoint default data */
2596         m = &inp->sctp_ep;
2597
2598         /* setup the base timeout information */
2599         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2600         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2601         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2602         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2603         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2604         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2605         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2606         /* all max/min max are in ms */
2607         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2608         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2609         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2610         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2611         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2612
2613         m->max_open_streams_intome = MAX_SCTP_STREAMS;
2614
2615         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2616         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2617         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2618         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2619         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2620         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2621         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2622
2623         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2624         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2625         /* number of streams to pre-open on a association */
2626         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2627
2628         /* Add adaptation cookie */
2629         m->adaptation_layer_indicator = 0x504C5253;
2630
2631         /* seed random number generator */
2632         m->random_counter = 1;
2633         m->store_at = SCTP_SIGNATURE_SIZE;
2634         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2635         sctp_fill_random_store(m);
2636
2637         /* Minimum cookie size */
2638         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2639             sizeof(struct sctp_state_cookie);
2640         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2641
2642         /* Setup the initial secret */
2643         (void)SCTP_GETTIME_TIMEVAL(&time);
2644         m->time_of_secret_change = time.tv_sec;
2645
2646         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2647                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2648         }
2649         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2650
2651         /* How long is a cookie good for ? */
2652         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2653         /*
2654          * Initialize authentication parameters
2655          */
2656         m->local_hmacs = sctp_default_supported_hmaclist();
2657         m->local_auth_chunks = sctp_alloc_chunklist();
2658         sctp_auth_set_default_chunks(m->local_auth_chunks);
2659         LIST_INIT(&m->shared_keys);
2660         /* add default NULL key as key id 0 */
2661         null_key = sctp_alloc_sharedkey();
2662         sctp_insert_sharedkey(&m->shared_keys, null_key);
2663         SCTP_INP_WUNLOCK(inp);
2664 #ifdef SCTP_LOG_CLOSING
2665         sctp_log_closing(inp, NULL, 12);
2666 #endif
2667         return (error);
2668 }
2669
2670
2671 void
2672 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2673     struct sctp_tcb *stcb)
2674 {
2675         struct sctp_nets *net;
2676         uint16_t lport, rport;
2677         struct sctppcbhead *head;
2678         struct sctp_laddr *laddr, *oladdr;
2679
2680         atomic_add_int(&stcb->asoc.refcnt, 1);
2681         SCTP_TCB_UNLOCK(stcb);
2682         SCTP_INP_INFO_WLOCK();
2683         SCTP_INP_WLOCK(old_inp);
2684         SCTP_INP_WLOCK(new_inp);
2685         SCTP_TCB_LOCK(stcb);
2686         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2687
2688         new_inp->sctp_ep.time_of_secret_change =
2689             old_inp->sctp_ep.time_of_secret_change;
2690         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2691             sizeof(old_inp->sctp_ep.secret_key));
2692         new_inp->sctp_ep.current_secret_number =
2693             old_inp->sctp_ep.current_secret_number;
2694         new_inp->sctp_ep.last_secret_number =
2695             old_inp->sctp_ep.last_secret_number;
2696         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2697
2698         /* make it so new data pours into the new socket */
2699         stcb->sctp_socket = new_inp->sctp_socket;
2700         stcb->sctp_ep = new_inp;
2701
2702         /* Copy the port across */
2703         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2704         rport = stcb->rport;
2705         /* Pull the tcb from the old association */
2706         LIST_REMOVE(stcb, sctp_tcbhash);
2707         LIST_REMOVE(stcb, sctp_tcblist);
2708         if (stcb->asoc.in_asocid_hash) {
2709                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2710         }
2711         /* Now insert the new_inp into the TCP connected hash */
2712         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2713
2714         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2715         /* Its safe to access */
2716         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2717
2718         /* Now move the tcb into the endpoint list */
2719         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2720         /*
2721          * Question, do we even need to worry about the ep-hash since we
2722          * only have one connection? Probably not :> so lets get rid of it
2723          * and not suck up any kernel memory in that.
2724          */
2725         if (stcb->asoc.in_asocid_hash) {
2726                 struct sctpasochead *lhd;
2727
2728                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2729                     new_inp->hashasocidmark)];
2730                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2731         }
2732         /* Ok. Let's restart timer. */
2733         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2734                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2735                     stcb, net);
2736         }
2737
2738         SCTP_INP_INFO_WUNLOCK();
2739         if (new_inp->sctp_tcbhash != NULL) {
2740                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2741                 new_inp->sctp_tcbhash = NULL;
2742         }
2743         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2744                 /* Subset bound, so copy in the laddr list from the old_inp */
2745                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2746                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2747                         if (laddr == NULL) {
2748                                 /*
2749                                  * Gak, what can we do? This assoc is really
2750                                  * HOSED. We probably should send an abort
2751                                  * here.
2752                                  */
2753                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2754                                 continue;
2755                         }
2756                         SCTP_INCR_LADDR_COUNT();
2757                         bzero(laddr, sizeof(*laddr));
2758                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2759                         laddr->ifa = oladdr->ifa;
2760                         atomic_add_int(&laddr->ifa->refcount, 1);
2761                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2762                             sctp_nxt_addr);
2763                         new_inp->laddr_count++;
2764                 }
2765         }
2766         /*
2767          * Now any running timers need to be adjusted since we really don't
2768          * care if they are running or not just blast in the new_inp into
2769          * all of them.
2770          */
2771
2772         stcb->asoc.hb_timer.ep = (void *)new_inp;
2773         stcb->asoc.dack_timer.ep = (void *)new_inp;
2774         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2775         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2776         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2777         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2778         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2779         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2780         /* now what about the nets? */
2781         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2782                 net->pmtu_timer.ep = (void *)new_inp;
2783                 net->rxt_timer.ep = (void *)new_inp;
2784                 net->fr_timer.ep = (void *)new_inp;
2785         }
2786         SCTP_INP_WUNLOCK(new_inp);
2787         SCTP_INP_WUNLOCK(old_inp);
2788 }
2789
2790
2791
2792
2793 /* sctp_ifap is used to bypass normal local address validation checks */
2794 int
2795 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2796     struct sctp_ifa *sctp_ifap, struct thread *p)
2797 {
2798         /* bind a ep to a socket address */
2799         struct sctppcbhead *head;
2800         struct sctp_inpcb *inp, *inp_tmp;
2801         struct inpcb *ip_inp;
2802         int port_reuse_active = 0;
2803         int bindall;
2804         uint16_t lport;
2805         int error;
2806         uint32_t vrf_id;
2807
2808         lport = 0;
2809         error = 0;
2810         bindall = 1;
2811         inp = (struct sctp_inpcb *)so->so_pcb;
2812         ip_inp = (struct inpcb *)so->so_pcb;
2813 #ifdef SCTP_DEBUG
2814         if (addr) {
2815                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n",
2816                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2817                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :");
2818                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2819         }
2820 #endif
2821         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2822                 /* already did a bind, subsequent binds NOT allowed ! */
2823                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2824                 return (EINVAL);
2825         }
2826 #ifdef INVARIANTS
2827         if (p == NULL)
2828                 panic("null proc/thread");
2829 #endif
2830         if (addr != NULL) {
2831                 switch (addr->sa_family) {
2832 #ifdef INET
2833                 case AF_INET:
2834                         {
2835                                 struct sockaddr_in *sin;
2836
2837                                 /* IPV6_V6ONLY socket? */
2838                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2839                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2840                                         return (EINVAL);
2841                                 }
2842                                 if (addr->sa_len != sizeof(*sin)) {
2843                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2844                                         return (EINVAL);
2845                                 }
2846                                 sin = (struct sockaddr_in *)addr;
2847                                 lport = sin->sin_port;
2848                                 /*
2849                                  * For LOOPBACK the prison_local_ip4() call
2850                                  * will transmute the ip address to the
2851                                  * proper value.
2852                                  */
2853                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2854                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2855                                         return (error);
2856                                 }
2857                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2858                                         bindall = 0;
2859                                 }
2860                                 break;
2861                         }
2862 #endif
2863 #ifdef INET6
2864                 case AF_INET6:
2865                         {
2866                                 /*
2867                                  * Only for pure IPv6 Address. (No IPv4
2868                                  * Mapped!)
2869                                  */
2870                                 struct sockaddr_in6 *sin6;
2871
2872                                 sin6 = (struct sockaddr_in6 *)addr;
2873
2874                                 if (addr->sa_len != sizeof(*sin6)) {
2875                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2876                                         return (EINVAL);
2877                                 }
2878                                 lport = sin6->sin6_port;
2879
2880                                 /*
2881                                  * For LOOPBACK the prison_local_ip6() call
2882                                  * will transmute the ipv6 address to the
2883                                  * proper value.
2884                                  */
2885                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2886                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2887                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2888                                         return (error);
2889                                 }
2890                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2891                                         bindall = 0;
2892                                         /* KAME hack: embed scopeid */
2893                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2894                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2895                                                 return (EINVAL);
2896                                         }
2897                                 }
2898                                 /* this must be cleared for ifa_ifwithaddr() */
2899                                 sin6->sin6_scope_id = 0;
2900                                 break;
2901                         }
2902 #endif
2903                 default:
2904                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2905                         return (EAFNOSUPPORT);
2906                 }
2907         }
2908         SCTP_INP_INFO_WLOCK();
2909         SCTP_INP_WLOCK(inp);
2910         /* Setup a vrf_id to be the default for the non-bind-all case. */
2911         vrf_id = inp->def_vrf_id;
2912
2913         /* increase our count due to the unlock we do */
2914         SCTP_INP_INCR_REF(inp);
2915         if (lport) {
2916                 /*
2917                  * Did the caller specify a port? if so we must see if a ep
2918                  * already has this one bound.
2919                  */
2920                 /* got to be root to get at low ports */
2921                 if (ntohs(lport) < IPPORT_RESERVED) {
2922                         if (p && (error =
2923                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2924                             )) {
2925                                 SCTP_INP_DECR_REF(inp);
2926                                 SCTP_INP_WUNLOCK(inp);
2927                                 SCTP_INP_INFO_WUNLOCK();
2928                                 return (error);
2929                         }
2930                 }
2931                 if (p == NULL) {
2932                         SCTP_INP_DECR_REF(inp);
2933                         SCTP_INP_WUNLOCK(inp);
2934                         SCTP_INP_INFO_WUNLOCK();
2935                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2936                         return (error);
2937                 }
2938                 SCTP_INP_WUNLOCK(inp);
2939                 if (bindall) {
2940                         vrf_id = inp->def_vrf_id;
2941                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2942                         if (inp_tmp != NULL) {
2943                                 /*
2944                                  * lock guy returned and lower count note
2945                                  * that we are not bound so inp_tmp should
2946                                  * NEVER be inp. And it is this inp
2947                                  * (inp_tmp) that gets the reference bump,
2948                                  * so we must lower it.
2949                                  */
2950                                 SCTP_INP_DECR_REF(inp_tmp);
2951                                 /* unlock info */
2952                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2953                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2954                                         /*
2955                                          * Ok, must be one-2-one and
2956                                          * allowing port re-use
2957                                          */
2958                                         port_reuse_active = 1;
2959                                         goto continue_anyway;
2960                                 }
2961                                 SCTP_INP_DECR_REF(inp);
2962                                 SCTP_INP_INFO_WUNLOCK();
2963                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2964                                 return (EADDRINUSE);
2965                         }
2966                 } else {
2967                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2968                         if (inp_tmp != NULL) {
2969                                 /*
2970                                  * lock guy returned and lower count note
2971                                  * that we are not bound so inp_tmp should
2972                                  * NEVER be inp. And it is this inp
2973                                  * (inp_tmp) that gets the reference bump,
2974                                  * so we must lower it.
2975                                  */
2976                                 SCTP_INP_DECR_REF(inp_tmp);
2977                                 /* unlock info */
2978                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2979                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2980                                         /*
2981                                          * Ok, must be one-2-one and
2982                                          * allowing port re-use
2983                                          */
2984                                         port_reuse_active = 1;
2985                                         goto continue_anyway;
2986                                 }
2987                                 SCTP_INP_DECR_REF(inp);
2988                                 SCTP_INP_INFO_WUNLOCK();
2989                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2990                                 return (EADDRINUSE);
2991                         }
2992                 }
2993 continue_anyway:
2994                 SCTP_INP_WLOCK(inp);
2995                 if (bindall) {
2996                         /* verify that no lport is not used by a singleton */
2997                         if ((port_reuse_active == 0) &&
2998                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))
2999                             ) {
3000                                 /* Sorry someone already has this one bound */
3001                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3002                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3003                                         port_reuse_active = 1;
3004                                 } else {
3005                                         SCTP_INP_DECR_REF(inp);
3006                                         SCTP_INP_WUNLOCK(inp);
3007                                         SCTP_INP_INFO_WUNLOCK();
3008                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3009                                         return (EADDRINUSE);
3010                                 }
3011                         }
3012                 }
3013         } else {
3014                 uint16_t first, last, candidate;
3015                 uint16_t count;
3016                 int done;
3017
3018                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3019                         first = MODULE_GLOBAL(ipport_hifirstauto);
3020                         last = MODULE_GLOBAL(ipport_hilastauto);
3021                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3022                         if (p && (error =
3023                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3024                             )) {
3025                                 SCTP_INP_DECR_REF(inp);
3026                                 SCTP_INP_WUNLOCK(inp);
3027                                 SCTP_INP_INFO_WUNLOCK();
3028                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3029                                 return (error);
3030                         }
3031                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3032                         last = MODULE_GLOBAL(ipport_lowlastauto);
3033                 } else {
3034                         first = MODULE_GLOBAL(ipport_firstauto);
3035                         last = MODULE_GLOBAL(ipport_lastauto);
3036                 }
3037                 if (first > last) {
3038                         uint16_t temp;
3039
3040                         temp = first;
3041                         first = last;
3042                         last = temp;
3043                 }
3044                 count = last - first + 1;       /* number of candidates */
3045                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3046
3047                 done = 0;
3048                 while (!done) {
3049                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3050                                 done = 1;
3051                         }
3052                         if (!done) {
3053                                 if (--count == 0) {
3054                                         SCTP_INP_DECR_REF(inp);
3055                                         SCTP_INP_WUNLOCK(inp);
3056                                         SCTP_INP_INFO_WUNLOCK();
3057                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3058                                         return (EADDRINUSE);
3059                                 }
3060                                 if (candidate == last)
3061                                         candidate = first;
3062                                 else
3063                                         candidate = candidate + 1;
3064                         }
3065                 }
3066                 lport = htons(candidate);
3067         }
3068         SCTP_INP_DECR_REF(inp);
3069         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3070             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3071                 /*
3072                  * this really should not happen. The guy did a non-blocking
3073                  * bind and then did a close at the same time.
3074                  */
3075                 SCTP_INP_WUNLOCK(inp);
3076                 SCTP_INP_INFO_WUNLOCK();
3077                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3078                 return (EINVAL);
3079         }
3080         /* ok we look clear to give out this port, so lets setup the binding */
3081         if (bindall) {
3082                 /* binding to all addresses, so just set in the proper flags */
3083                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3084                 /* set the automatic addr changes from kernel flag */
3085                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3086                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3087                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3088                 } else {
3089                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3090                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3091                 }
3092                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3093                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3094                 } else {
3095                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096                 }
3097                 /*
3098                  * set the automatic mobility_base from kernel flag (by
3099                  * micchie)
3100                  */
3101                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3102                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3104                 } else {
3105                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3106                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3107                 }
3108                 /*
3109                  * set the automatic mobility_fasthandoff from kernel flag
3110                  * (by micchie)
3111                  */
3112                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3113                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3114                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3115                 } else {
3116                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3117                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3118                 }
3119         } else {
3120                 /*
3121                  * bind specific, make sure flags is off and add a new
3122                  * address structure to the sctp_addr_list inside the ep
3123                  * structure.
3124                  *
3125                  * We will need to allocate one and insert it at the head. The
3126                  * socketopt call can just insert new addresses in there as
3127                  * well. It will also have to do the embed scope kame hack
3128                  * too (before adding).
3129                  */
3130                 struct sctp_ifa *ifa;
3131                 struct sockaddr_storage store_sa;
3132
3133                 memset(&store_sa, 0, sizeof(store_sa));
3134                 switch (addr->sa_family) {
3135                 case AF_INET:
3136                         {
3137                                 struct sockaddr_in *sin;
3138
3139                                 sin = (struct sockaddr_in *)&store_sa;
3140                                 memcpy(sin, addr, sizeof(struct sockaddr_in));
3141                                 sin->sin_port = 0;
3142                                 break;
3143                         }
3144                 case AF_INET6:
3145                         {
3146                                 struct sockaddr_in6 *sin6;
3147
3148                                 sin6 = (struct sockaddr_in6 *)&store_sa;
3149                                 memcpy(sin6, addr, sizeof(struct sockaddr_in6));
3150                                 sin6->sin6_port = 0;
3151                                 break;
3152                         }
3153                 default:
3154                         break;
3155                 }
3156                 /*
3157                  * first find the interface with the bound address need to
3158                  * zero out the port to find the address! yuck! can't do
3159                  * this earlier since need port for sctp_pcb_findep()
3160                  */
3161                 if (sctp_ifap != NULL)
3162                         ifa = sctp_ifap;
3163                 else {
3164                         /*
3165                          * Note for BSD we hit here always other O/S's will
3166                          * pass things in via the sctp_ifap argument
3167                          * (Panda).
3168                          */
3169                         ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
3170                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3171                 }
3172                 if (ifa == NULL) {
3173                         /* Can't find an interface with that address */
3174                         SCTP_INP_WUNLOCK(inp);
3175                         SCTP_INP_INFO_WUNLOCK();
3176                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3177                         return (EADDRNOTAVAIL);
3178                 }
3179 #ifdef INET6
3180                 if (addr->sa_family == AF_INET6) {
3181                         /* GAK, more FIXME IFA lock? */
3182                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3183                                 /* Can't bind a non-existent addr. */
3184                                 SCTP_INP_WUNLOCK(inp);
3185                                 SCTP_INP_INFO_WUNLOCK();
3186                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3187                                 return (EINVAL);
3188                         }
3189                 }
3190 #endif
3191                 /* we're not bound all */
3192                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3193                 /* allow bindx() to send ASCONF's for binding changes */
3194                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3195                 /* clear automatic addr changes from kernel flag */
3196                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3197
3198                 /* add this address to the endpoint list */
3199                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3200                 if (error != 0) {
3201                         SCTP_INP_WUNLOCK(inp);
3202                         SCTP_INP_INFO_WUNLOCK();
3203                         return (error);
3204                 }
3205                 inp->laddr_count++;
3206         }
3207         /* find the bucket */
3208         if (port_reuse_active) {
3209                 /* Put it into tcp 1-2-1 hash */
3210                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3211                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3212         } else {
3213                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3214         }
3215         /* put it in the bucket */
3216         LIST_INSERT_HEAD(head, inp, sctp_hash);
3217         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3218             head, ntohs(lport), port_reuse_active);
3219         /* set in the port */
3220         inp->sctp_lport = lport;
3221
3222         /* turn off just the unbound flag */
3223         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3224         SCTP_INP_WUNLOCK(inp);
3225         SCTP_INP_INFO_WUNLOCK();
3226         return (0);
3227 }
3228
3229
3230 static void
3231 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3232 {
3233         struct sctp_iterator *it, *nit;
3234
3235         /*
3236          * We enter with the only the ITERATOR_LOCK in place and a write
3237          * lock on the inp_info stuff.
3238          */
3239         it = sctp_it_ctl.cur_it;
3240         if (it && (it->vn != curvnet)) {
3241                 /* Its not looking at our VNET */
3242                 return;
3243         }
3244         if (it && (it->inp == inp)) {
3245                 /*
3246                  * This is tricky and we hold the iterator lock, but when it
3247                  * returns and gets the lock (when we release it) the
3248                  * iterator will try to operate on inp. We need to stop that
3249                  * from happening. But of course the iterator has a
3250                  * reference on the stcb and inp. We can mark it and it will
3251                  * stop.
3252                  *
3253                  * If its a single iterator situation, we set the end iterator
3254                  * flag. Otherwise we set the iterator to go to the next
3255                  * inp.
3256                  *
3257                  */
3258                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3259                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3260                 } else {
3261                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3262                 }
3263         }
3264         /*
3265          * Now go through and remove any single reference to our inp that
3266          * may be still pending on the list
3267          */
3268         SCTP_IPI_ITERATOR_WQ_LOCK();
3269         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3270                 if (it->vn != curvnet) {
3271                         continue;
3272                 }
3273                 if (it->inp == inp) {
3274                         /* This one points to me is it inp specific? */
3275                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3276                                 /* Remove and free this one */
3277                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3278                                     it, sctp_nxt_itr);
3279                                 if (it->function_atend != NULL) {
3280                                         (*it->function_atend) (it->pointer, it->val);
3281                                 }
3282                                 SCTP_FREE(it, SCTP_M_ITER);
3283                         } else {
3284                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3285                                 if (it->inp) {
3286                                         SCTP_INP_INCR_REF(it->inp);
3287                                 }
3288                         }
3289                         /*
3290                          * When its put in the refcnt is incremented so decr
3291                          * it
3292                          */
3293                         SCTP_INP_DECR_REF(inp);
3294                 }
3295         }
3296         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3297 }
3298
3299 /* release sctp_inpcb unbind the port */
3300 void
3301 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3302 {
3303         /*
3304          * Here we free a endpoint. We must find it (if it is in the Hash
3305          * table) and remove it from there. Then we must also find it in the
3306          * overall list and remove it from there. After all removals are
3307          * complete then any timer has to be stopped. Then start the actual
3308          * freeing. a) Any local lists. b) Any associations. c) The hash of
3309          * all associations. d) finally the ep itself.
3310          */
3311         struct sctp_pcb *m;
3312         struct sctp_tcb *asoc, *nasoc;
3313         struct sctp_laddr *laddr, *nladdr;
3314         struct inpcb *ip_pcb;
3315         struct socket *so;
3316         int being_refed = 0;
3317         struct sctp_queued_to_read *sq, *nsq;
3318         int cnt;
3319         sctp_sharedkey_t *shared_key, *nshared_key;
3320
3321
3322 #ifdef SCTP_LOG_CLOSING
3323         sctp_log_closing(inp, NULL, 0);
3324 #endif
3325         SCTP_ITERATOR_LOCK();
3326         /* mark any iterators on the list or being processed */
3327         sctp_iterator_inp_being_freed(inp);
3328         SCTP_ITERATOR_UNLOCK();
3329         so = inp->sctp_socket;
3330         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3331                 /* been here before.. eeks.. get out of here */
3332                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3333 #ifdef SCTP_LOG_CLOSING
3334                 sctp_log_closing(inp, NULL, 1);
3335 #endif
3336                 return;
3337         }
3338         SCTP_ASOC_CREATE_LOCK(inp);
3339         SCTP_INP_INFO_WLOCK();
3340
3341         SCTP_INP_WLOCK(inp);
3342         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3343                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3344                 /* socket is gone, so no more wakeups allowed */
3345                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3346                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3347                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3348
3349         }
3350         /* First time through we have the socket lock, after that no more. */
3351         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3352             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3353
3354         if (inp->control) {
3355                 sctp_m_freem(inp->control);
3356                 inp->control = NULL;
3357         }
3358         if (inp->pkt) {
3359                 sctp_m_freem(inp->pkt);
3360                 inp->pkt = NULL;
3361         }
3362         m = &inp->sctp_ep;
3363         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3364                                          * here but I will be nice :> (i.e.
3365                                          * ip_pcb = ep;) */
3366         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3367                 int cnt_in_sd;
3368
3369                 cnt_in_sd = 0;
3370                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3371                         SCTP_TCB_LOCK(asoc);
3372                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3373                                 /* Skip guys being freed */
3374                                 cnt_in_sd++;
3375                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3376                                         /*
3377                                          * Special case - we did not start a
3378                                          * kill timer on the asoc due to it
3379                                          * was not closed. So go ahead and
3380                                          * start it now.
3381                                          */
3382                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3383                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3384                                 }
3385                                 SCTP_TCB_UNLOCK(asoc);
3386                                 continue;
3387                         }
3388                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3389                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3390                             (asoc->asoc.total_output_queue_size == 0)) {
3391                                 /*
3392                                  * If we have data in queue, we don't want
3393                                  * to just free since the app may have done,
3394                                  * send()/close or connect/send/close. And
3395                                  * it wants the data to get across first.
3396                                  */
3397                                 /* Just abandon things in the front states */
3398                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3399                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3400                                         cnt_in_sd++;
3401                                 }
3402                                 continue;
3403                         }
3404                         /* Disconnect the socket please */
3405                         asoc->sctp_socket = NULL;
3406                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3407                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3408                             (asoc->asoc.control_pdapi) ||
3409                             (asoc->asoc.size_on_all_streams > 0) ||
3410                             (so && (so->so_rcv.sb_cc > 0))
3411                             ) {
3412                                 /* Left with Data unread */
3413                                 struct mbuf *op_err;
3414
3415                                 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3416                                     0, M_DONTWAIT, 1, MT_DATA);
3417                                 if (op_err) {
3418                                         /* Fill in the user initiated abort */
3419                                         struct sctp_paramhdr *ph;
3420                                         uint32_t *ippp;
3421
3422                                         SCTP_BUF_LEN(op_err) =
3423                                             sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
3424                                         ph = mtod(op_err,
3425                                             struct sctp_paramhdr *);
3426                                         ph->param_type = htons(
3427                                             SCTP_CAUSE_USER_INITIATED_ABT);
3428                                         ph->param_length = htons(SCTP_BUF_LEN(op_err));
3429                                         ippp = (uint32_t *) (ph + 1);
3430                                         *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
3431                                 }
3432                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3433 #if defined(SCTP_PANIC_ON_ABORT)
3434                                 panic("inpcb_free does an abort");
3435 #endif
3436                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3437                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3438                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3439                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3440                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3441                                 }
3442                                 if (sctp_free_assoc(inp, asoc,
3443                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3444                                         cnt_in_sd++;
3445                                 }
3446                                 continue;
3447                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3448                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3449                                     (asoc->asoc.stream_queue_cnt == 0)
3450                             ) {
3451                                 if (asoc->asoc.locked_on_sending) {
3452                                         goto abort_anyway;
3453                                 }
3454                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3455                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3456                                         /*
3457                                          * there is nothing queued to send,
3458                                          * so I send shutdown
3459                                          */
3460                                         sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
3461                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3462                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3463                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3464                                         }
3465                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3466                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3467                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3468                                             asoc->asoc.primary_destination);
3469                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3470                                             asoc->asoc.primary_destination);
3471                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3472                                 }
3473                         } else {
3474                                 /* mark into shutdown pending */
3475                                 struct sctp_stream_queue_pending *sp;
3476
3477                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3478                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3479                                     asoc->asoc.primary_destination);
3480                                 if (asoc->asoc.locked_on_sending) {
3481                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3482                                             sctp_streamhead);
3483                                         if (sp == NULL) {
3484                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3485                                                     asoc->asoc.locked_on_sending,
3486                                                     asoc->asoc.locked_on_sending->stream_no);
3487                                         } else {
3488                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3489                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3490                                         }
3491                                 }
3492                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3493                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3494                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3495                                         struct mbuf *op_err;
3496
3497                         abort_anyway:
3498                                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3499                                             0, M_DONTWAIT, 1, MT_DATA);
3500                                         if (op_err) {
3501                                                 /*
3502                                                  * Fill in the user
3503                                                  * initiated abort
3504                                                  */
3505                                                 struct sctp_paramhdr *ph;
3506                                                 uint32_t *ippp;
3507
3508                                                 SCTP_BUF_LEN(op_err) =
3509                                                     (sizeof(struct sctp_paramhdr) +
3510                                                     sizeof(uint32_t));
3511                                                 ph = mtod(op_err,
3512                                                     struct sctp_paramhdr *);
3513                                                 ph->param_type = htons(
3514                                                     SCTP_CAUSE_USER_INITIATED_ABT);
3515                                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3516                                                 ippp = (uint32_t *) (ph + 1);
3517                                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
3518                                         }
3519                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3520 #if defined(SCTP_PANIC_ON_ABORT)
3521                                         panic("inpcb_free does an abort");
3522 #endif
3523
3524                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3525                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3526                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3527                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3528                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3529                                         }
3530                                         if (sctp_free_assoc(inp, asoc,
3531                                             SCTP_PCBFREE_NOFORCE,
3532                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3533                                                 cnt_in_sd++;
3534                                         }
3535                                         continue;
3536                                 } else {
3537                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3538                                 }
3539                         }
3540                         cnt_in_sd++;
3541                         SCTP_TCB_UNLOCK(asoc);
3542                 }
3543                 /* now is there some left in our SHUTDOWN state? */
3544                 if (cnt_in_sd) {
3545 #ifdef SCTP_LOG_CLOSING
3546                         sctp_log_closing(inp, NULL, 2);
3547 #endif
3548                         inp->sctp_socket = NULL;
3549                         SCTP_INP_WUNLOCK(inp);
3550                         SCTP_ASOC_CREATE_UNLOCK(inp);
3551                         SCTP_INP_INFO_WUNLOCK();
3552                         return;
3553                 }
3554         }
3555         inp->sctp_socket = NULL;
3556         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3557             SCTP_PCB_FLAGS_UNBOUND) {
3558                 /*
3559                  * ok, this guy has been bound. It's port is somewhere in
3560                  * the SCTP_BASE_INFO(hash table). Remove it!
3561                  */
3562                 LIST_REMOVE(inp, sctp_hash);
3563                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3564         }
3565         /*
3566          * If there is a timer running to kill us, forget it, since it may
3567          * have a contest on the INP lock.. which would cause us to die ...
3568          */
3569         cnt = 0;
3570         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3571                 SCTP_TCB_LOCK(asoc);
3572                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3573                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3574                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3575                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3576                         }
3577                         cnt++;
3578                         SCTP_TCB_UNLOCK(asoc);
3579                         continue;
3580                 }
3581                 /* Free associations that are NOT killing us */
3582                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3583                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3584                         struct mbuf *op_err;
3585                         uint32_t *ippp;
3586
3587                         op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
3588                             0, M_DONTWAIT, 1, MT_DATA);
3589                         if (op_err) {
3590                                 /* Fill in the user initiated abort */
3591                                 struct sctp_paramhdr *ph;
3592
3593                                 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
3594                                     sizeof(uint32_t));
3595                                 ph = mtod(op_err, struct sctp_paramhdr *);
3596                                 ph->param_type = htons(
3597                                     SCTP_CAUSE_USER_INITIATED_ABT);
3598                                 ph->param_length = htons(SCTP_BUF_LEN(op_err));
3599                                 ippp = (uint32_t *) (ph + 1);
3600                                 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
3601
3602                         }
3603                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3604 #if defined(SCTP_PANIC_ON_ABORT)
3605                         panic("inpcb_free does an abort");
3606 #endif
3607                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3608                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3609                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3610                         cnt++;
3611                         SCTP_TCB_UNLOCK(asoc);
3612                         continue;
3613                 }
3614                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3615                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3616                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3617                 }
3618                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3619                         cnt++;
3620                 }
3621         }
3622         if (cnt) {
3623                 /* Ok we have someone out there that will kill us */
3624                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3625 #ifdef SCTP_LOG_CLOSING
3626                 sctp_log_closing(inp, NULL, 3);
3627 #endif
3628                 SCTP_INP_WUNLOCK(inp);
3629                 SCTP_ASOC_CREATE_UNLOCK(inp);
3630                 SCTP_INP_INFO_WUNLOCK();
3631                 return;
3632         }
3633         if (SCTP_INP_LOCK_CONTENDED(inp))
3634                 being_refed++;
3635         if (SCTP_INP_READ_CONTENDED(inp))
3636                 being_refed++;
3637         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3638                 being_refed++;
3639
3640         if ((inp->refcount) ||
3641             (being_refed) ||
3642             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3643                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3644 #ifdef SCTP_LOG_CLOSING
3645                 sctp_log_closing(inp, NULL, 4);
3646 #endif
3647                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3648                 SCTP_INP_WUNLOCK(inp);
3649                 SCTP_ASOC_CREATE_UNLOCK(inp);
3650                 SCTP_INP_INFO_WUNLOCK();
3651                 return;
3652         }
3653         inp->sctp_ep.signature_change.type = 0;
3654         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3655         /*
3656          * Remove it from the list .. last thing we need a lock for.
3657          */
3658         LIST_REMOVE(inp, sctp_list);
3659         SCTP_INP_WUNLOCK(inp);
3660         SCTP_ASOC_CREATE_UNLOCK(inp);
3661         SCTP_INP_INFO_WUNLOCK();
3662         /*
3663          * Now we release all locks. Since this INP cannot be found anymore
3664          * except possibly by the kill timer that might be running. We call
3665          * the drain function here. It should hit the case were it sees the
3666          * ACTIVE flag cleared and exit out freeing us to proceed and
3667          * destroy everything.
3668          */
3669         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3670                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3671         } else {
3672                 /* Probably un-needed */
3673                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3674         }
3675
3676 #ifdef SCTP_LOG_CLOSING
3677         sctp_log_closing(inp, NULL, 5);
3678 #endif
3679
3680
3681         if ((inp->sctp_asocidhash) != NULL) {
3682                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3683                 inp->sctp_asocidhash = NULL;
3684         }
3685         /* sa_ignore FREED_MEMORY */
3686         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3687                 /* Its only abandoned if it had data left */
3688                 if (sq->length)
3689                         SCTP_STAT_INCR(sctps_left_abandon);
3690
3691                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3692                 sctp_free_remote_addr(sq->whoFrom);
3693                 if (so)
3694                         so->so_rcv.sb_cc -= sq->length;
3695                 if (sq->data) {
3696                         sctp_m_freem(sq->data);
3697                         sq->data = NULL;
3698                 }
3699                 /*
3700                  * no need to free the net count, since at this point all
3701                  * assoc's are gone.
3702                  */
3703                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3704                 SCTP_DECR_READQ_COUNT();
3705         }
3706         /* Now the sctp_pcb things */
3707         /*
3708          * free each asoc if it is not already closed/free. we can't use the
3709          * macro here since le_next will get freed as part of the
3710          * sctp_free_assoc() call.
3711          */
3712         cnt = 0;
3713         if (so) {
3714 #ifdef IPSEC
3715                 ipsec_delete_pcbpolicy(ip_pcb);
3716 #endif                          /* IPSEC */
3717
3718                 /* Unlocks not needed since the socket is gone now */
3719         }
3720         if (ip_pcb->inp_options) {
3721                 (void)sctp_m_free(ip_pcb->inp_options);
3722                 ip_pcb->inp_options = 0;
3723         }
3724 #ifdef INET
3725         if (ip_pcb->inp_moptions) {
3726                 inp_freemoptions(ip_pcb->inp_moptions);
3727                 ip_pcb->inp_moptions = 0;
3728         }
3729 #endif
3730
3731 #ifdef INET6
3732         if (ip_pcb->inp_vflag & INP_IPV6) {
3733                 struct in6pcb *in6p;
3734
3735                 in6p = (struct in6pcb *)inp;
3736                 ip6_freepcbopts(in6p->in6p_outputopts);
3737         }
3738 #endif                          /* INET6 */
3739         ip_pcb->inp_vflag = 0;
3740         /* free up authentication fields */
3741         if (inp->sctp_ep.local_auth_chunks != NULL)
3742                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3743         if (inp->sctp_ep.local_hmacs != NULL)
3744                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3745
3746         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3747                 LIST_REMOVE(shared_key, next);
3748                 sctp_free_sharedkey(shared_key);
3749                 /* sa_ignore FREED_MEMORY */
3750         }
3751
3752         /*
3753          * if we have an address list the following will free the list of
3754          * ifaddr's that are set into this ep. Again macro limitations here,
3755          * since the LIST_FOREACH could be a bad idea.
3756          */
3757         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3758                 sctp_remove_laddr(laddr);
3759         }
3760
3761 #ifdef SCTP_TRACK_FREED_ASOCS
3762         /* TEMP CODE */
3763         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3764                 LIST_REMOVE(asoc, sctp_tcblist);
3765                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3766                 SCTP_DECR_ASOC_COUNT();
3767         }
3768         /* *** END TEMP CODE *** */
3769 #endif
3770         /* Now lets see about freeing the EP hash table. */
3771         if (inp->sctp_tcbhash != NULL) {
3772                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3773                 inp->sctp_tcbhash = NULL;
3774         }
3775         /* Now we must put the ep memory back into the zone pool */
3776         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3777         SCTP_INP_LOCK_DESTROY(inp);
3778         SCTP_INP_READ_DESTROY(inp);
3779         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3780         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3781         SCTP_DECR_EP_COUNT();
3782 }
3783
3784
3785 struct sctp_nets *
3786 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3787 {
3788         struct sctp_nets *net;
3789
3790         /* locate the address */
3791         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3792                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3793                         return (net);
3794         }
3795         return (NULL);
3796 }
3797
3798
3799 int
3800 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3801 {
3802         struct sctp_ifa *sctp_ifa;
3803
3804         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3805         if (sctp_ifa) {
3806                 return (1);
3807         } else {
3808                 return (0);
3809         }
3810 }
3811
3812 /*
3813  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3814  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3815  * stats of stuff.
3816  */
3817 int
3818 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3819     int set_scope, int from)
3820 {
3821         /*
3822          * The following is redundant to the same lines in the
3823          * sctp_aloc_assoc() but is needed since others call the add address
3824          * function
3825          */
3826         struct sctp_nets *net, *netfirst;
3827         int addr_inscope;
3828
3829         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3830             from);
3831         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3832
3833         netfirst = sctp_findnet(stcb, newaddr);
3834         if (netfirst) {
3835                 /*
3836                  * Lie and return ok, we don't want to make the association
3837                  * go away for this behavior. It will happen in the TCP
3838                  * model in a connected socket. It does not reach the hash
3839                  * table until after the association is built so it can't be
3840                  * found. Mark as reachable, since the initial creation will
3841                  * have been cleared and the NOT_IN_ASSOC flag will have
3842                  * been added... and we don't want to end up removing it
3843                  * back out.
3844                  */
3845                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3846                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3847                             SCTP_ADDR_UNCONFIRMED);
3848                 } else {
3849                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3850                 }
3851
3852                 return (0);
3853         }
3854         addr_inscope = 1;
3855         switch (newaddr->sa_family) {
3856 #ifdef INET
3857         case AF_INET:
3858                 {
3859                         struct sockaddr_in *sin;
3860
3861                         sin = (struct sockaddr_in *)newaddr;
3862                         if (sin->sin_addr.s_addr == 0) {
3863                                 /* Invalid address */
3864                                 return (-1);
3865                         }
3866                         /* zero out the bzero area */
3867                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3868
3869                         /* assure len is set */
3870                         sin->sin_len = sizeof(struct sockaddr_in);
3871                         if (set_scope) {
3872 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3873                                 stcb->ipv4_local_scope = 1;
3874 #else
3875                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3876                                         stcb->asoc.ipv4_local_scope = 1;
3877                                 }
3878 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3879                         } else {
3880                                 /* Validate the address is in scope */
3881                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3882                                     (stcb->asoc.ipv4_local_scope == 0)) {
3883                                         addr_inscope = 0;
3884                                 }
3885                         }
3886                         break;
3887                 }
3888 #endif
3889 #ifdef INET6
3890         case AF_INET6:
3891                 {
3892                         struct sockaddr_in6 *sin6;
3893
3894                         sin6 = (struct sockaddr_in6 *)newaddr;
3895                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3896                                 /* Invalid address */
3897                                 return (-1);
3898                         }
3899                         /* assure len is set */
3900                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3901                         if (set_scope) {
3902                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3903                                         stcb->asoc.loopback_scope = 1;
3904                                         stcb->asoc.local_scope = 0;
3905                                         stcb->asoc.ipv4_local_scope = 1;
3906                                         stcb->asoc.site_scope = 1;
3907                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3908                                         /*
3909                                          * If the new destination is a
3910                                          * LINK_LOCAL we must have common
3911                                          * site scope. Don't set the local
3912                                          * scope since we may not share all
3913                                          * links, only loopback can do this.
3914                                          * Links on the local network would
3915                                          * also be on our private network
3916                                          * for v4 too.
3917                                          */
3918                                         stcb->asoc.ipv4_local_scope = 1;
3919                                         stcb->asoc.site_scope = 1;
3920                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3921                                         /*
3922                                          * If the new destination is
3923                                          * SITE_LOCAL then we must have site
3924                                          * scope in common.
3925                                          */
3926                                         stcb->asoc.site_scope = 1;
3927                                 }
3928                         } else {
3929                                 /* Validate the address is in scope */
3930                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3931                                     (stcb->asoc.loopback_scope == 0)) {
3932                                         addr_inscope = 0;
3933                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3934                                     (stcb->asoc.local_scope == 0)) {
3935                                         addr_inscope = 0;
3936                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3937                                     (stcb->asoc.site_scope == 0)) {
3938                                         addr_inscope = 0;
3939                                 }
3940                         }
3941                         break;
3942                 }
3943 #endif
3944         default:
3945                 /* not supported family type */
3946                 return (-1);
3947         }
3948         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3949         if (net == NULL) {
3950                 return (-1);
3951         }
3952         SCTP_INCR_RADDR_COUNT();
3953         bzero(net, sizeof(*net));
3954         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3955         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3956         switch (newaddr->sa_family) {
3957 #ifdef INET
3958         case AF_INET:
3959                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3960                 break;
3961 #endif
3962 #ifdef INET6
3963         case AF_INET6:
3964                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3965                 break;
3966 #endif
3967         default:
3968                 break;
3969         }
3970         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3971         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3972                 stcb->asoc.loopback_scope = 1;
3973                 stcb->asoc.ipv4_local_scope = 1;
3974                 stcb->asoc.local_scope = 0;
3975                 stcb->asoc.site_scope = 1;
3976                 addr_inscope = 1;
3977         }
3978         net->failure_threshold = stcb->asoc.def_net_failure;
3979         if (addr_inscope == 0) {
3980                 net->dest_state = (SCTP_ADDR_REACHABLE |
3981                     SCTP_ADDR_OUT_OF_SCOPE);
3982         } else {
3983                 if (from == SCTP_ADDR_IS_CONFIRMED)
3984                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3985                         net->dest_state = SCTP_ADDR_REACHABLE;
3986                 else
3987                         net->dest_state = SCTP_ADDR_REACHABLE |
3988                             SCTP_ADDR_UNCONFIRMED;
3989         }
3990         /*
3991          * We set this to 0, the timer code knows that this means its an
3992          * initial value
3993          */
3994         net->rto_needed = 1;
3995         net->RTO = 0;
3996         net->RTO_measured = 0;
3997         stcb->asoc.numnets++;
3998         *(&net->ref_count) = 1;
3999         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
4000         net->tos_flowlabel = 0;
4001         if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) {
4002                 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4003         } else {
4004                 net->port = 0;
4005         }
4006 #ifdef INET
4007         if (newaddr->sa_family == AF_INET)
4008                 net->tos_flowlabel = stcb->asoc.default_tos;
4009 #endif
4010 #ifdef INET6
4011         if (newaddr->sa_family == AF_INET6)
4012                 net->tos_flowlabel = stcb->asoc.default_flowlabel;
4013 #endif
4014         /* Init the timer structure */
4015         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
4016         SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
4017         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
4018
4019         /* Now generate a route for this guy */
4020 #ifdef INET6
4021         /* KAME hack: embed scopeid */
4022         if (newaddr->sa_family == AF_INET6) {
4023                 struct sockaddr_in6 *sin6;
4024
4025                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4026                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
4027                 sin6->sin6_scope_id = 0;
4028         }
4029 #endif
4030         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
4031
4032         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
4033                 /* Get source address */
4034                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
4035                     stcb,
4036                     (sctp_route_t *) & net->ro,
4037                     net,
4038                     0,
4039                     stcb->asoc.vrf_id);
4040                 /* Now get the interface MTU */
4041                 if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
4042                         net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
4043                 } else {
4044                         net->mtu = 0;
4045                 }
4046                 if (net->mtu == 0) {
4047                         /* Huh ?? */
4048                         net->mtu = SCTP_DEFAULT_MTU;
4049                 } else {
4050                         uint32_t rmtu;
4051
4052                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4053                         if (rmtu == 0) {
4054                                 /*
4055                                  * Start things off to match mtu of
4056                                  * interface please.
4057                                  */
4058                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4059                                     net->ro.ro_rt, net->mtu);
4060                         } else {
4061                                 /*
4062                                  * we take the route mtu over the interface,
4063                                  * since the route may be leading out the
4064                                  * loopback, or a different interface.
4065                                  */
4066                                 net->mtu = rmtu;
4067                         }
4068                 }
4069                 if (from == SCTP_ALLOC_ASOC) {
4070                         stcb->asoc.smallest_mtu = net->mtu;
4071                 }
4072         } else {
4073                 net->mtu = stcb->asoc.smallest_mtu;
4074         }
4075 #ifdef INET6
4076         if (newaddr->sa_family == AF_INET6) {
4077                 struct sockaddr_in6 *sin6;
4078
4079                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4080                 (void)sa6_recoverscope(sin6);
4081         }
4082 #endif
4083         if (net->port) {
4084                 net->mtu -= sizeof(struct udphdr);
4085         }
4086         if (stcb->asoc.smallest_mtu > net->mtu) {
4087                 stcb->asoc.smallest_mtu = net->mtu;
4088         }
4089         /* JRS - Use the congestion control given in the CC module */
4090         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4091                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4092
4093         /*
4094          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4095          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4096          */
4097         net->find_pseudo_cumack = 1;
4098         net->find_rtx_pseudo_cumack = 1;
4099         net->src_addr_selected = 0;
4100         /* Choose an initial flowid. */
4101         net->flowid = stcb->asoc.my_vtag ^
4102             ntohs(stcb->rport) ^
4103             ntohs(stcb->sctp_ep->sctp_lport);
4104 #ifdef INVARIANTS
4105         net->flowidset = 1;
4106 #endif
4107         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4108         if (net->ro.ro_rt == NULL) {
4109                 /* Since we have no route put it at the back */
4110                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4111         } else if (netfirst == NULL) {
4112                 /* We are the first one in the pool. */
4113                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4114         } else if (netfirst->ro.ro_rt == NULL) {
4115                 /*
4116                  * First one has NO route. Place this one ahead of the first
4117                  * one.
4118                  */
4119                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4120         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4121                 /*
4122                  * This one has a different interface than the one at the
4123                  * top of the list. Place it ahead.
4124                  */
4125                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4126         } else {
4127                 /*
4128                  * Ok we have the same interface as the first one. Move
4129                  * forward until we find either a) one with a NULL route...
4130                  * insert ahead of that b) one with a different ifp.. insert
4131                  * after that. c) end of the list.. insert at the tail.
4132                  */
4133                 struct sctp_nets *netlook;
4134
4135                 do {
4136                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4137                         if (netlook == NULL) {
4138                                 /* End of the list */
4139                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4140                                 break;
4141                         } else if (netlook->ro.ro_rt == NULL) {
4142                                 /* next one has NO route */
4143                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4144                                 break;
4145                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4146                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4147                                     net, sctp_next);
4148                                 break;
4149                         }
4150                         /* Shift forward */
4151                         netfirst = netlook;
4152                 } while (netlook != NULL);
4153         }
4154
4155         /* got to have a primary set */
4156         if (stcb->asoc.primary_destination == 0) {
4157                 stcb->asoc.primary_destination = net;
4158         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4159                     (net->ro.ro_rt) &&
4160             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4161                 /* No route to current primary adopt new primary */
4162                 stcb->asoc.primary_destination = net;
4163         }
4164         sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
4165             net);
4166         /* Validate primary is first */
4167         net = TAILQ_FIRST(&stcb->asoc.nets);
4168         if ((net != stcb->asoc.primary_destination) &&
4169             (stcb->asoc.primary_destination)) {
4170                 /*
4171                  * first one on the list is NOT the primary sctp_cmpaddr()
4172                  * is much more efficient if the primary is the first on the
4173                  * list, make it so.
4174                  */
4175                 TAILQ_REMOVE(&stcb->asoc.nets,
4176                     stcb->asoc.primary_destination, sctp_next);
4177                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4178                     stcb->asoc.primary_destination, sctp_next);
4179         }
4180         return (0);
4181 }
4182
4183
4184 static uint32_t
4185 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4186 {
4187         uint32_t id;
4188         struct sctpasochead *head;
4189         struct sctp_tcb *lstcb;
4190
4191         SCTP_INP_WLOCK(inp);
4192 try_again:
4193         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4194                 /* TSNH */
4195                 SCTP_INP_WUNLOCK(inp);
4196                 return (0);
4197         }
4198         /*
4199          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4200          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4201          */
4202         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4203                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4204         }
4205         id = inp->sctp_associd_counter;
4206         inp->sctp_associd_counter++;
4207         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4208         if (lstcb) {
4209                 goto try_again;
4210         }
4211         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4212         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4213         stcb->asoc.in_asocid_hash = 1;
4214         SCTP_INP_WUNLOCK(inp);
4215         return id;
4216 }
4217
4218 /*
4219  * allocate an association and add it to the endpoint. The caller must be
4220  * careful to add all additional addresses once they are know right away or
4221  * else the assoc will be may experience a blackout scenario.
4222  */
4223 struct sctp_tcb *
4224 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4225     int *error, uint32_t override_tag, uint32_t vrf_id,
4226     struct thread *p
4227 )
4228 {
4229         /* note the p argument is only valid in unbound sockets */
4230
4231         struct sctp_tcb *stcb;
4232         struct sctp_association *asoc;
4233         struct sctpasochead *head;
4234         uint16_t rport;
4235         int err;
4236
4237         /*
4238          * Assumption made here: Caller has done a
4239          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4240          * address does not exist already.
4241          */
4242         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4243                 /* Hit max assoc, sorry no more */
4244                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4245                 *error = ENOBUFS;
4246                 return (NULL);
4247         }
4248         if (firstaddr == NULL) {
4249                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4250                 *error = EINVAL;
4251                 return (NULL);
4252         }
4253         SCTP_INP_RLOCK(inp);
4254         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4255             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4256             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4257                 /*
4258                  * If its in the TCP pool, its NOT allowed to create an
4259                  * association. The parent listener needs to call
4260                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4261                  * off, or connected one does this.. its an error.
4262                  */
4263                 SCTP_INP_RUNLOCK(inp);
4264                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4265                 *error = EINVAL;
4266                 return (NULL);
4267         }
4268         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4269 #ifdef SCTP_DEBUG
4270         if (firstaddr) {
4271                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4272                 switch (firstaddr->sa_family) {
4273 #ifdef INET
4274                 case AF_INET:
4275                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4276                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4277                         break;
4278 #endif
4279 #ifdef INET6
4280                 case AF_INET6:
4281                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4282                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4283                         break;
4284 #endif
4285                 default:
4286                         break;
4287                 }
4288         } else {
4289                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4290         }
4291 #endif                          /* SCTP_DEBUG */
4292         switch (firstaddr->sa_family) {
4293 #ifdef INET
4294         case AF_INET:
4295                 {
4296                         struct sockaddr_in *sin;
4297
4298                         sin = (struct sockaddr_in *)firstaddr;
4299                         if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
4300                                 /* Invalid address */
4301                                 SCTP_INP_RUNLOCK(inp);
4302                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4303                                 *error = EINVAL;
4304                                 return (NULL);
4305                         }
4306                         rport = sin->sin_port;
4307                         break;
4308                 }
4309 #endif
4310 #ifdef INET6
4311         case AF_INET6:
4312                 {
4313                         struct sockaddr_in6 *sin6;
4314
4315                         sin6 = (struct sockaddr_in6 *)firstaddr;
4316                         if ((sin6->sin6_port == 0) ||
4317                             (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
4318                                 /* Invalid address */
4319                                 SCTP_INP_RUNLOCK(inp);
4320                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4321                                 *error = EINVAL;
4322                                 return (NULL);
4323                         }
4324                         rport = sin6->sin6_port;
4325                         break;
4326                 }
4327 #endif
4328         default:
4329                 /* not supported family type */
4330                 SCTP_INP_RUNLOCK(inp);
4331                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4332                 *error = EINVAL;
4333                 return (NULL);
4334         }
4335         SCTP_INP_RUNLOCK(inp);
4336         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4337                 /*
4338                  * If you have not performed a bind, then we need to do the
4339                  * ephemeral bind for you.
4340                  */
4341                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4342                     (struct sockaddr *)NULL,
4343                     (struct sctp_ifa *)NULL,
4344                     p
4345                     ))) {
4346                         /* bind error, probably perm */
4347                         *error = err;
4348                         return (NULL);
4349                 }
4350         }
4351         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4352         if (stcb == NULL) {
4353                 /* out of memory? */
4354                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4355                 *error = ENOMEM;
4356                 return (NULL);
4357         }
4358         SCTP_INCR_ASOC_COUNT();
4359
4360         bzero(stcb, sizeof(*stcb));
4361         asoc = &stcb->asoc;
4362
4363         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4364         SCTP_TCB_LOCK_INIT(stcb);
4365         SCTP_TCB_SEND_LOCK_INIT(stcb);
4366         stcb->rport = rport;
4367         /* setup back pointer's */
4368         stcb->sctp_ep = inp;
4369         stcb->sctp_socket = inp->sctp_socket;
4370         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4371                 /* failed */
4372                 SCTP_TCB_LOCK_DESTROY(stcb);
4373                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4374                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4375                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4376                 SCTP_DECR_ASOC_COUNT();
4377                 *error = err;
4378                 return (NULL);
4379         }
4380         /* and the port */
4381         SCTP_INP_INFO_WLOCK();
4382         SCTP_INP_WLOCK(inp);
4383         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4384                 /* inpcb freed while alloc going on */
4385                 SCTP_TCB_LOCK_DESTROY(stcb);
4386                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4387                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4388                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4389                 SCTP_INP_WUNLOCK(inp);
4390                 SCTP_INP_INFO_WUNLOCK();
4391                 SCTP_DECR_ASOC_COUNT();
4392                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4393                 *error = EINVAL;
4394                 return (NULL);
4395         }
4396         SCTP_TCB_LOCK(stcb);
4397
4398         /* now that my_vtag is set, add it to the hash */
4399         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4400         /* put it in the bucket in the vtag hash of assoc's for the system */
4401         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4402         SCTP_INP_INFO_WUNLOCK();
4403
4404         if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4405                 /* failure.. memory error? */
4406                 if (asoc->strmout) {
4407                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4408                         asoc->strmout = NULL;
4409                 }
4410                 if (asoc->mapping_array) {
4411                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4412                         asoc->mapping_array = NULL;
4413                 }
4414                 if (asoc->nr_mapping_array) {
4415                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4416                         asoc->nr_mapping_array = NULL;
4417                 }
4418                 SCTP_DECR_ASOC_COUNT();
4419                 SCTP_TCB_LOCK_DESTROY(stcb);
4420                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4421                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4422                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4423                 SCTP_INP_WUNLOCK(inp);
4424                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4425                 *error = ENOBUFS;
4426                 return (NULL);
4427         }
4428         /* Init all the timers */
4429         SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer);
4430         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4431         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4432         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4433         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4434         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4435         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4436         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4437
4438         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4439         /* now file the port under the hash as well */
4440         if (inp->sctp_tcbhash != NULL) {
4441                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4442                     inp->sctp_hashmark)];
4443                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4444         }
4445         SCTP_INP_WUNLOCK(inp);
4446         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
4447         return (stcb);
4448 }
4449
4450
4451 void
4452 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4453 {
4454         struct sctp_association *asoc;
4455
4456         asoc = &stcb->asoc;
4457         asoc->numnets--;
4458         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4459         if (net == asoc->primary_destination) {
4460                 /* Reset primary */
4461                 struct sctp_nets *lnet;
4462
4463                 lnet = TAILQ_FIRST(&asoc->nets);
4464                 /*
4465                  * Mobility adaptation Ideally, if deleted destination is
4466                  * the primary, it becomes a fast retransmission trigger by
4467                  * the subsequent SET PRIMARY. (by micchie)
4468                  */
4469                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4470                     SCTP_MOBILITY_BASE) ||
4471                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4472                     SCTP_MOBILITY_FASTHANDOFF)) {
4473                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4474                         if (asoc->deleted_primary != NULL) {
4475                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4476                                 goto out;
4477                         }
4478                         asoc->deleted_primary = net;
4479                         atomic_add_int(&net->ref_count, 1);
4480                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4481                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4482                         sctp_mobility_feature_on(stcb->sctp_ep,
4483                             SCTP_MOBILITY_PRIM_DELETED);
4484                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4485                             stcb->sctp_ep, stcb, NULL);
4486                 }
4487 out:
4488                 /* Try to find a confirmed primary */
4489                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4490         }
4491         if (net == asoc->last_data_chunk_from) {
4492                 /* Reset primary */
4493                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4494         }
4495         if (net == asoc->last_control_chunk_from) {
4496                 /* Clear net */
4497                 asoc->last_control_chunk_from = NULL;
4498         }
4499         sctp_free_remote_addr(net);
4500 }
4501
4502 /*
4503  * remove a remote endpoint address from an association, it will fail if the
4504  * address does not exist.
4505  */
4506 int
4507 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4508 {
4509         /*
4510          * Here we need to remove a remote address. This is quite simple, we
4511          * first find it in the list of address for the association
4512          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4513          * on that item. Note we do not allow it to be removed if there are
4514          * no other addresses.
4515          */
4516         struct sctp_association *asoc;
4517         struct sctp_nets *net, *nnet;
4518
4519         asoc = &stcb->asoc;
4520
4521         /* locate the address */
4522         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4523                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4524                         continue;
4525                 }
4526                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4527                     remaddr)) {
4528                         /* we found the guy */
4529                         if (asoc->numnets < 2) {
4530                                 /* Must have at LEAST two remote addresses */
4531                                 return (-1);
4532                         } else {
4533                                 sctp_remove_net(stcb, net);
4534                                 return (0);
4535                         }
4536                 }
4537         }
4538         /* not found. */
4539         return (-2);
4540 }
4541
4542 void
4543 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4544 {
4545         struct sctpvtaghead *chain;
4546         struct sctp_tagblock *twait_block;
4547         int found = 0;
4548         int i;
4549
4550         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4551         if (!LIST_EMPTY(chain)) {
4552                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4553                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4554                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4555                                     (twait_block->vtag_block[i].lport == lport) &&
4556                                     (twait_block->vtag_block[i].rport == rport)) {
4557                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4558                                         twait_block->vtag_block[i].v_tag = 0;
4559                                         twait_block->vtag_block[i].lport = 0;
4560                                         twait_block->vtag_block[i].rport = 0;
4561                                         found = 1;
4562                                         break;
4563                                 }
4564                         }
4565                         if (found)
4566                                 break;
4567                 }
4568         }
4569 }
4570
4571 int
4572 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4573 {
4574         struct sctpvtaghead *chain;
4575         struct sctp_tagblock *twait_block;
4576         int found = 0;
4577         int i;
4578
4579         SCTP_INP_INFO_WLOCK();
4580         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4581         if (!LIST_EMPTY(chain)) {
4582                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4583                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4584                                 if ((twait_block->vtag_block[i].v_tag == tag) &&
4585                                     (twait_block->vtag_block[i].lport == lport) &&
4586                                     (twait_block->vtag_block[i].rport == rport)) {
4587                                         found = 1;
4588                                         break;
4589                                 }
4590                         }
4591                         if (found)
4592                                 break;
4593                 }
4594         }
4595         SCTP_INP_INFO_WUNLOCK();
4596         return (found);
4597 }
4598
4599
4600 void
4601 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4602 {
4603         struct sctpvtaghead *chain;
4604         struct sctp_tagblock *twait_block;
4605         struct timeval now;
4606         int set, i;
4607
4608         if (time == 0) {
4609                 /* Its disabled */
4610                 return;
4611         }
4612         (void)SCTP_GETTIME_TIMEVAL(&now);
4613         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4614         set = 0;
4615         if (!LIST_EMPTY(chain)) {
4616                 /* Block(s) present, lets find space, and expire on the fly */
4617                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4618                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4619                                 if ((twait_block->vtag_block[i].v_tag == 0) &&
4620                                     !set) {
4621                                         twait_block->vtag_block[i].tv_sec_at_expire =
4622                                             now.tv_sec + time;
4623                                         twait_block->vtag_block[i].v_tag = tag;
4624                                         twait_block->vtag_block[i].lport = lport;
4625                                         twait_block->vtag_block[i].rport = rport;
4626                                         set = 1;
4627                                 } else if ((twait_block->vtag_block[i].v_tag) &&
4628                                     ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4629                                         /* Audit expires this guy */
4630                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
4631                                         twait_block->vtag_block[i].v_tag = 0;
4632                                         twait_block->vtag_block[i].lport = 0;
4633                                         twait_block->vtag_block[i].rport = 0;
4634                                         if (set == 0) {
4635                                                 /* Reuse it for my new tag */
4636                                                 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4637                                                 twait_block->vtag_block[i].v_tag = tag;
4638                                                 twait_block->vtag_block[i].lport = lport;
4639                                                 twait_block->vtag_block[i].rport = rport;
4640                                                 set = 1;
4641                                         }
4642                                 }
4643                         }
4644                         if (set) {
4645                                 /*
4646                                  * We only do up to the block where we can
4647                                  * place our tag for audits
4648                                  */
4649                                 break;
4650                         }
4651                 }
4652         }
4653         /* Need to add a new block to chain */
4654         if (!set) {
4655                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4656                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4657                 if (twait_block == NULL) {
4658 #ifdef INVARIANTS
4659                         panic("Can not alloc tagblock");
4660 #endif
4661                         return;
4662                 }
4663                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4664                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4665                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4666                 twait_block->vtag_block[0].v_tag = tag;
4667                 twait_block->vtag_block[0].lport = lport;
4668                 twait_block->vtag_block[0].rport = rport;
4669         }
4670 }
4671
4672
4673
4674 /*-
4675  * Free the association after un-hashing the remote port. This
4676  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4677  * expect that the input to this function IS a locked TCB.
4678  * It will return 0, if it did NOT destroy the association (instead
4679  * it unlocks it. It will return NON-zero if it either destroyed the
4680  * association OR the association is already destroyed.
4681  */
4682 int
4683 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4684 {
4685         int i;
4686         struct sctp_association *asoc;
4687         struct sctp_nets *net, *nnet;
4688         struct sctp_laddr *laddr, *naddr;
4689         struct sctp_tmit_chunk *chk, *nchk;
4690         struct sctp_asconf_addr *aparam, *naparam;
4691         struct sctp_asconf_ack *aack, *naack;
4692         struct sctp_stream_reset_list *strrst, *nstrrst;
4693         struct sctp_queued_to_read *sq, *nsq;
4694         struct sctp_stream_queue_pending *sp, *nsp;
4695         sctp_sharedkey_t *shared_key, *nshared_key;
4696         struct socket *so;
4697
4698         /* first, lets purge the entry from the hash table. */
4699
4700 #ifdef SCTP_LOG_CLOSING
4701         sctp_log_closing(inp, stcb, 6);
4702 #endif
4703         if (stcb->asoc.state == 0) {
4704 #ifdef SCTP_LOG_CLOSING
4705                 sctp_log_closing(inp, NULL, 7);
4706 #endif
4707                 /* there is no asoc, really TSNH :-0 */
4708                 return (1);
4709         }
4710         /* TEMP CODE */
4711         if (stcb->freed_from_where == 0) {
4712                 /* Only record the first place free happened from */
4713                 stcb->freed_from_where = from_location;
4714         }
4715         /* TEMP CODE */
4716
4717         asoc = &stcb->asoc;
4718         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4719             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4720                 /* nothing around */
4721                 so = NULL;
4722         else
4723                 so = inp->sctp_socket;
4724
4725         /*
4726          * We used timer based freeing if a reader or writer is in the way.
4727          * So we first check if we are actually being called from a timer,
4728          * if so we abort early if a reader or writer is still in the way.
4729          */
4730         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4731             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4732                 /*
4733                  * is it the timer driving us? if so are the reader/writers
4734                  * gone?
4735                  */
4736                 if (stcb->asoc.refcnt) {
4737                         /* nope, reader or writer in the way */
4738                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4739                         /* no asoc destroyed */
4740                         SCTP_TCB_UNLOCK(stcb);
4741 #ifdef SCTP_LOG_CLOSING
4742                         sctp_log_closing(inp, stcb, 8);
4743 #endif
4744                         return (0);
4745                 }
4746         }
4747         /* now clean up any other timers */
4748         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4749         asoc->hb_timer.self = NULL;
4750         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4751         asoc->dack_timer.self = NULL;
4752         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4753         /*-
4754          * For stream reset we don't blast this unless
4755          * it is a str-reset timer, it might be the
4756          * free-asoc timer which we DON'T want to
4757          * disturb.
4758          */
4759         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4760                 asoc->strreset_timer.self = NULL;
4761         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4762         asoc->asconf_timer.self = NULL;
4763         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4764         asoc->autoclose_timer.self = NULL;
4765         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4766         asoc->shut_guard_timer.self = NULL;
4767         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4768         asoc->delayed_event_timer.self = NULL;
4769         /* Mobility adaptation */
4770         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4771         asoc->delete_prim_timer.self = NULL;
4772         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4773                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4774                 net->fr_timer.self = NULL;
4775                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4776                 net->rxt_timer.self = NULL;
4777                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4778                 net->pmtu_timer.self = NULL;
4779         }
4780         /* Now the read queue needs to be cleaned up (only once) */
4781         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4782                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4783                 SCTP_INP_READ_LOCK(inp);
4784                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4785                         if (sq->stcb == stcb) {
4786                                 sq->do_not_ref_stcb = 1;
4787                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4788                                 /*
4789                                  * If there is no end, there never will be
4790                                  * now.
4791                                  */
4792                                 if (sq->end_added == 0) {
4793                                         /* Held for PD-API clear that. */
4794                                         sq->pdapi_aborted = 1;
4795                                         sq->held_length = 0;
4796                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4797                                                 /*
4798                                                  * Need to add a PD-API
4799                                                  * aborted indication.
4800                                                  * Setting the control_pdapi
4801                                                  * assures that it will be
4802                                                  * added right after this
4803                                                  * msg.
4804                                                  */
4805                                                 uint32_t strseq;
4806
4807                                                 stcb->asoc.control_pdapi = sq;
4808                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4809                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4810                                                     stcb,
4811                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4812                                                     (void *)&strseq,
4813                                                     SCTP_SO_LOCKED);
4814                                                 stcb->asoc.control_pdapi = NULL;
4815                                         }
4816                                 }
4817                                 /* Add an end to wake them */
4818                                 sq->end_added = 1;
4819                         }
4820                 }
4821                 SCTP_INP_READ_UNLOCK(inp);
4822                 if (stcb->block_entry) {
4823                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4824                         stcb->block_entry->error = ECONNRESET;
4825                         stcb->block_entry = NULL;
4826                 }
4827         }
4828         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4829                 /*
4830                  * Someone holds a reference OR the socket is unaccepted
4831                  * yet.
4832                  */
4833                 if ((stcb->asoc.refcnt) ||
4834                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4835                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4836                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4837                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4838                 }
4839                 SCTP_TCB_UNLOCK(stcb);
4840                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4841                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4842                         /* nothing around */
4843                         so = NULL;
4844                 if (so) {
4845                         /* Wake any reader/writers */
4846                         sctp_sorwakeup(inp, so);
4847                         sctp_sowwakeup(inp, so);
4848                 }
4849 #ifdef SCTP_LOG_CLOSING
4850                 sctp_log_closing(inp, stcb, 9);
4851 #endif
4852                 /* no asoc destroyed */
4853                 return (0);
4854         }
4855 #ifdef SCTP_LOG_CLOSING
4856         sctp_log_closing(inp, stcb, 10);
4857 #endif
4858         /*
4859          * When I reach here, no others want to kill the assoc yet.. and I
4860          * own the lock. Now its possible an abort comes in when I do the
4861          * lock exchange below to grab all the locks to do the final take
4862          * out. to prevent this we increment the count, which will start a
4863          * timer and blow out above thus assuring us that we hold exclusive
4864          * killing of the asoc. Note that after getting back the TCB lock we
4865          * will go ahead and increment the counter back up and stop any
4866          * timer a passing stranger may have started :-S
4867          */
4868         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4869                 atomic_add_int(&stcb->asoc.refcnt, 1);
4870
4871                 SCTP_TCB_UNLOCK(stcb);
4872                 SCTP_INP_INFO_WLOCK();
4873                 SCTP_INP_WLOCK(inp);
4874                 SCTP_TCB_LOCK(stcb);
4875         }
4876         /* Double check the GONE flag */
4877         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4878             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4879                 /* nothing around */
4880                 so = NULL;
4881
4882         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4883             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4884                 /*
4885                  * For TCP type we need special handling when we are
4886                  * connected. We also include the peel'ed off ones to.
4887                  */
4888                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4889                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4890                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4891                         if (so) {
4892                                 SOCK_LOCK(so);
4893                                 if (so->so_rcv.sb_cc == 0) {
4894                                         so->so_state &= ~(SS_ISCONNECTING |
4895                                             SS_ISDISCONNECTING |
4896                                             SS_ISCONFIRMING |
4897                                             SS_ISCONNECTED);
4898                                 }
4899                                 socantrcvmore_locked(so);
4900                                 sctp_sowwakeup(inp, so);
4901                                 sctp_sorwakeup(inp, so);
4902                                 SCTP_SOWAKEUP(so);
4903                         }
4904                 }
4905         }
4906         /*
4907          * Make it invalid too, that way if its about to run it will abort
4908          * and return.
4909          */
4910         /* re-increment the lock */
4911         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4912                 atomic_add_int(&stcb->asoc.refcnt, -1);
4913         }
4914         if (stcb->asoc.refcnt) {
4915                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4916                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4917                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4918                         SCTP_INP_INFO_WUNLOCK();
4919                         SCTP_INP_WUNLOCK(inp);
4920                 }
4921                 SCTP_TCB_UNLOCK(stcb);
4922                 return (0);
4923         }
4924         asoc->state = 0;
4925         if (inp->sctp_tcbhash) {
4926                 LIST_REMOVE(stcb, sctp_tcbhash);
4927         }
4928         if (stcb->asoc.in_asocid_hash) {
4929                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4930         }
4931         /* Now lets remove it from the list of ALL associations in the EP */
4932         LIST_REMOVE(stcb, sctp_tcblist);
4933         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4934                 SCTP_INP_INCR_REF(inp);
4935                 SCTP_INP_WUNLOCK(inp);
4936         }
4937         /* pull from vtag hash */
4938         LIST_REMOVE(stcb, sctp_asocs);
4939         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4940             inp->sctp_lport, stcb->rport);
4941
4942         /*
4943          * Now restop the timers to be sure this is paranoia at is finest!
4944          */
4945         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4946         (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
4947         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4948         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4949         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4950         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4951         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4952         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4953         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4954                 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
4955                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4956                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4957         }
4958
4959         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4960         /*
4961          * The chunk lists and such SHOULD be empty but we check them just
4962          * in case.
4963          */
4964         /* anything on the wheel needs to be removed */
4965         for (i = 0; i < asoc->streamoutcnt; i++) {
4966                 struct sctp_stream_out *outs;
4967
4968                 outs = &asoc->strmout[i];
4969                 /* now clean up any chunks here */
4970                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4971                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4972                         if (sp->data) {
4973                                 if (so) {
4974                                         /* Still an open socket - report */
4975                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4976                                             SCTP_NOTIFY_DATAGRAM_UNSENT,
4977                                             (void *)sp, SCTP_SO_LOCKED);
4978                                 }
4979                                 if (sp->data) {
4980                                         sctp_m_freem(sp->data);
4981                                         sp->data = NULL;
4982                                         sp->tail_mbuf = NULL;
4983                                 }
4984                         }
4985                         if (sp->net) {
4986                                 sctp_free_remote_addr(sp->net);
4987                                 sp->net = NULL;
4988                         }
4989                         sctp_free_spbufspace(stcb, asoc, sp);
4990                         if (sp->holds_key_ref)
4991                                 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED);
4992                         /* Free the zone stuff  */
4993                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp);
4994                         SCTP_DECR_STRMOQ_COUNT();
4995                         /* sa_ignore FREED_MEMORY */
4996                 }
4997         }
4998         /* sa_ignore FREED_MEMORY */
4999         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5000                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5001                 SCTP_FREE(strrst, SCTP_M_STRESET);
5002         }
5003         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5004                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5005                 if (sq->data) {
5006                         sctp_m_freem(sq->data);
5007                         sq->data = NULL;
5008                 }
5009                 sctp_free_remote_addr(sq->whoFrom);
5010                 sq->whoFrom = NULL;
5011                 sq->stcb = NULL;
5012                 /* Free the ctl entry */
5013                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
5014                 SCTP_DECR_READQ_COUNT();
5015                 /* sa_ignore FREED_MEMORY */
5016         }
5017         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5018                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5019                 if (chk->data) {
5020                         sctp_m_freem(chk->data);
5021                         chk->data = NULL;
5022                 }
5023                 if (chk->holds_key_ref)
5024                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5025                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5026                 SCTP_DECR_CHK_COUNT();
5027                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5028                 asoc->free_chunk_cnt--;
5029                 /* sa_ignore FREED_MEMORY */
5030         }
5031         /* pending send queue SHOULD be empty */
5032         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5033                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5034                 if (chk->data) {
5035                         if (so) {
5036                                 /* Still a socket? */
5037                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5038                                     SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED);
5039                         }
5040                         if (chk->data) {
5041                                 sctp_m_freem(chk->data);
5042                                 chk->data = NULL;
5043                         }
5044                 }
5045                 if (chk->holds_key_ref)
5046                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5047                 if (chk->whoTo) {
5048                         sctp_free_remote_addr(chk->whoTo);
5049                         chk->whoTo = NULL;
5050                 }
5051                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5052                 SCTP_DECR_CHK_COUNT();
5053                 /* sa_ignore FREED_MEMORY */
5054         }
5055         /* sent queue SHOULD be empty */
5056         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5057                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5058                 if (chk->data) {
5059                         if (so) {
5060                                 /* Still a socket? */
5061                                 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb,
5062                                     SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED);
5063                         }
5064                         if (chk->data) {
5065                                 sctp_m_freem(chk->data);
5066                                 chk->data = NULL;
5067                         }
5068                 }
5069                 if (chk->holds_key_ref)
5070                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5071                 sctp_free_remote_addr(chk->whoTo);
5072                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5073                 SCTP_DECR_CHK_COUNT();
5074                 /* sa_ignore FREED_MEMORY */
5075         }
5076         /* control queue MAY not be empty */
5077         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5078                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5079                 if (chk->data) {
5080                         sctp_m_freem(chk->data);
5081                         chk->data = NULL;
5082                 }
5083                 if (chk->holds_key_ref)
5084                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5085                 sctp_free_remote_addr(chk->whoTo);
5086                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5087                 SCTP_DECR_CHK_COUNT();
5088                 /* sa_ignore FREED_MEMORY */
5089         }
5090         /* ASCONF queue MAY not be empty */
5091         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5092                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5093                 if (chk->data) {
5094                         sctp_m_freem(chk->data);
5095                         chk->data = NULL;
5096                 }
5097                 if (chk->holds_key_ref)
5098                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5099                 sctp_free_remote_addr(chk->whoTo);
5100                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5101                 SCTP_DECR_CHK_COUNT();
5102                 /* sa_ignore FREED_MEMORY */
5103         }
5104         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5105                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5106                 if (chk->data) {
5107                         sctp_m_freem(chk->data);
5108                         chk->data = NULL;
5109                 }
5110                 if (chk->holds_key_ref)
5111                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5112                 sctp_free_remote_addr(chk->whoTo);
5113                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5114                 SCTP_DECR_CHK_COUNT();
5115                 /* sa_ignore FREED_MEMORY */
5116         }
5117
5118         if (asoc->mapping_array) {
5119                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5120                 asoc->mapping_array = NULL;
5121         }
5122         if (asoc->nr_mapping_array) {
5123                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5124                 asoc->nr_mapping_array = NULL;
5125         }
5126         /* the stream outs */
5127         if (asoc->strmout) {
5128                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5129                 asoc->strmout = NULL;
5130         }
5131         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5132         if (asoc->strmin) {
5133                 struct sctp_queued_to_read *ctl, *nctl;
5134
5135                 for (i = 0; i < asoc->streamincnt; i++) {
5136                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5137                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5138                                 sctp_free_remote_addr(ctl->whoFrom);
5139                                 if (ctl->data) {
5140                                         sctp_m_freem(ctl->data);
5141                                         ctl->data = NULL;
5142                                 }
5143                                 /*
5144                                  * We don't free the address here since all
5145                                  * the net's were freed above.
5146                                  */
5147                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5148                                 SCTP_DECR_READQ_COUNT();
5149                         }
5150                 }
5151                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5152                 asoc->strmin = NULL;
5153         }
5154         asoc->streamincnt = 0;
5155         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5156 #ifdef INVARIANTS
5157                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5158                         panic("no net's left alloc'ed, or list points to itself");
5159                 }
5160 #endif
5161                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5162                 sctp_free_remote_addr(net);
5163         }
5164         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5165                 /* sa_ignore FREED_MEMORY */
5166                 sctp_remove_laddr(laddr);
5167         }
5168
5169         /* pending asconf (address) parameters */
5170         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5171                 /* sa_ignore FREED_MEMORY */
5172                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5173                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5174         }
5175         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5176                 /* sa_ignore FREED_MEMORY */
5177                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5178                 if (aack->data != NULL) {
5179                         sctp_m_freem(aack->data);
5180                 }
5181                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5182         }
5183         /* clean up auth stuff */
5184         if (asoc->local_hmacs)
5185                 sctp_free_hmaclist(asoc->local_hmacs);
5186         if (asoc->peer_hmacs)
5187                 sctp_free_hmaclist(asoc->peer_hmacs);
5188
5189         if (asoc->local_auth_chunks)
5190                 sctp_free_chunklist(asoc->local_auth_chunks);
5191         if (asoc->peer_auth_chunks)
5192                 sctp_free_chunklist(asoc->peer_auth_chunks);
5193
5194         sctp_free_authinfo(&asoc->authinfo);
5195
5196         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5197                 LIST_REMOVE(shared_key, next);
5198                 sctp_free_sharedkey(shared_key);
5199                 /* sa_ignore FREED_MEMORY */
5200         }
5201
5202         /* Insert new items here :> */
5203
5204         /* Get rid of LOCK */
5205         SCTP_TCB_LOCK_DESTROY(stcb);
5206         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5207         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5208                 SCTP_INP_INFO_WUNLOCK();
5209                 SCTP_INP_RLOCK(inp);
5210         }
5211 #ifdef SCTP_TRACK_FREED_ASOCS
5212         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5213                 /* now clean up the tasoc itself */
5214                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5215                 SCTP_DECR_ASOC_COUNT();
5216         } else {
5217                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5218         }
5219 #else
5220         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5221         SCTP_DECR_ASOC_COUNT();
5222 #endif
5223         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5224                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5225                         /*
5226                          * If its NOT the inp_free calling us AND sctp_close
5227                          * as been called, we call back...
5228                          */
5229                         SCTP_INP_RUNLOCK(inp);
5230                         /*
5231                          * This will start the kill timer (if we are the
5232                          * last one) since we hold an increment yet. But
5233                          * this is the only safe way to do this since
5234                          * otherwise if the socket closes at the same time
5235                          * we are here we might collide in the cleanup.
5236                          */
5237                         sctp_inpcb_free(inp,
5238                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5239                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5240                         SCTP_INP_DECR_REF(inp);
5241                         goto out_of;
5242                 } else {
5243                         /* The socket is still open. */
5244                         SCTP_INP_DECR_REF(inp);
5245                 }
5246         }
5247         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5248                 SCTP_INP_RUNLOCK(inp);
5249         }
5250 out_of:
5251         /* destroyed the asoc */
5252 #ifdef SCTP_LOG_CLOSING
5253         sctp_log_closing(inp, NULL, 11);
5254 #endif
5255         return (1);
5256 }
5257
5258
5259
5260 /*
5261  * determine if a destination is "reachable" based upon the addresses bound
5262  * to the current endpoint (e.g. only v4 or v6 currently bound)
5263  */
5264 /*
5265  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5266  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5267  * types bound as its endpoint
5268  */
5269 int
5270 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5271 {
5272         struct sctp_inpcb *inp;
5273         int answer;
5274
5275         /*
5276          * No locks here, the TCB, in all cases is already locked and an
5277          * assoc is up. There is either a INP lock by the caller applied (in
5278          * asconf case when deleting an address) or NOT in the HB case,
5279          * however if HB then the INP increment is up and the INP will not
5280          * be removed (on top of the fact that we have a TCB lock). So we
5281          * only want to read the sctp_flags, which is either bound-all or
5282          * not.. no protection needed since once an assoc is up you can't be
5283          * changing your binding.
5284          */
5285         inp = stcb->sctp_ep;
5286         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5287                 /* if bound all, destination is not restricted */
5288                 /*
5289                  * RRS: Question during lock work: Is this correct? If you
5290                  * are bound-all you still might need to obey the V4--V6
5291                  * flags??? IMO this bound-all stuff needs to be removed!
5292                  */
5293                 return (1);
5294         }
5295         /* NOTE: all "scope" checks are done when local addresses are added */
5296         switch (destaddr->sa_family) {
5297         case AF_INET6:
5298                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5299                 break;
5300         case AF_INET:
5301                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5302                 break;
5303         default:
5304                 /* invalid family, so it's unreachable */
5305                 answer = 0;
5306                 break;
5307         }
5308         return (answer);
5309 }
5310
5311 /*
5312  * update the inp_vflags on an endpoint
5313  */
5314 static void
5315 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5316 {
5317         struct sctp_laddr *laddr;
5318
5319         /* first clear the flag */
5320         inp->ip_inp.inp.inp_vflag = 0;
5321         /* set the flag based on addresses on the ep list */
5322         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5323                 if (laddr->ifa == NULL) {
5324                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5325                             __FUNCTION__);
5326                         continue;
5327                 }
5328                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5329                         continue;
5330                 }
5331                 switch (laddr->ifa->address.sa.sa_family) {
5332 #ifdef INET6
5333                 case AF_INET6:
5334                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5335                         break;
5336 #endif
5337 #ifdef INET
5338                 case AF_INET:
5339                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5340                         break;
5341 #endif
5342                 default:
5343                         break;
5344                 }
5345         }
5346 }
5347
5348 /*
5349  * Add the address to the endpoint local address list There is nothing to be
5350  * done if we are bound to all addresses
5351  */
5352 void
5353 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5354 {
5355         struct sctp_laddr *laddr;
5356         int fnd, error = 0;
5357
5358         fnd = 0;
5359
5360         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5361                 /* You are already bound to all. You have it already */
5362                 return;
5363         }
5364 #ifdef INET6
5365         if (ifa->address.sa.sa_family == AF_INET6) {
5366                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5367                         /* Can't bind a non-useable addr. */
5368                         return;
5369                 }
5370         }
5371 #endif
5372         /* first, is it already present? */
5373         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5374                 if (laddr->ifa == ifa) {
5375                         fnd = 1;
5376                         break;
5377                 }
5378         }
5379
5380         if (fnd == 0) {
5381                 /* Not in the ep list */
5382                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5383                 if (error != 0)
5384                         return;
5385                 inp->laddr_count++;
5386                 /* update inp_vflag flags */
5387                 switch (ifa->address.sa.sa_family) {
5388 #ifdef INET6
5389                 case AF_INET6:
5390                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5391                         break;
5392 #endif
5393 #ifdef INET6
5394                 case AF_INET:
5395                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5396                         break;
5397 #endif
5398                 default:
5399                         break;
5400                 }
5401         }
5402         return;
5403 }
5404
5405
5406 /*
5407  * select a new (hopefully reachable) destination net (should only be used
5408  * when we deleted an ep addr that is the only usable source address to reach
5409  * the destination net)
5410  */
5411 static void
5412 sctp_select_primary_destination(struct sctp_tcb *stcb)
5413 {
5414         struct sctp_nets *net;
5415
5416         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5417                 /* for now, we'll just pick the first reachable one we find */
5418                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5419                         continue;
5420                 if (sctp_destination_is_reachable(stcb,
5421                     (struct sockaddr *)&net->ro._l_addr)) {
5422                         /* found a reachable destination */
5423                         stcb->asoc.primary_destination = net;
5424                 }
5425         }
5426         /* I can't there from here! ...we're gonna die shortly... */
5427 }
5428
5429
5430 /*
5431  * Delete the address from the endpoint local address list There is nothing
5432  * to be done if we are bound to all addresses
5433  */
5434 void
5435 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5436 {
5437         struct sctp_laddr *laddr;
5438         int fnd;
5439
5440         fnd = 0;
5441         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5442                 /* You are already bound to all. You have it already */
5443                 return;
5444         }
5445         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5446                 if (laddr->ifa == ifa) {
5447                         fnd = 1;
5448                         break;
5449                 }
5450         }
5451         if (fnd && (inp->laddr_count < 2)) {
5452                 /* can't delete unless there are at LEAST 2 addresses */
5453                 return;
5454         }
5455         if (fnd) {
5456                 /*
5457                  * clean up any use of this address go through our
5458                  * associations and clear any last_used_address that match
5459                  * this one for each assoc, see if a new primary_destination
5460                  * is needed
5461                  */
5462                 struct sctp_tcb *stcb;
5463
5464                 /* clean up "next_addr_touse" */
5465                 if (inp->next_addr_touse == laddr)
5466                         /* delete this address */
5467                         inp->next_addr_touse = NULL;
5468
5469                 /* clean up "last_used_address" */
5470                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5471                         struct sctp_nets *net;
5472
5473                         SCTP_TCB_LOCK(stcb);
5474                         if (stcb->asoc.last_used_address == laddr)
5475                                 /* delete this address */
5476                                 stcb->asoc.last_used_address = NULL;
5477                         /*
5478                          * Now spin through all the nets and purge any ref
5479                          * to laddr
5480                          */
5481                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5482                                 if (net->ro._s_addr &&
5483                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5484                                         /* Yep, purge src address selected */
5485                                         sctp_rtentry_t *rt;
5486
5487                                         /* delete this address if cached */
5488                                         rt = net->ro.ro_rt;
5489                                         if (rt != NULL) {
5490                                                 RTFREE(rt);
5491                                                 net->ro.ro_rt = NULL;
5492                                         }
5493                                         sctp_free_ifa(net->ro._s_addr);
5494                                         net->ro._s_addr = NULL;
5495                                         net->src_addr_selected = 0;
5496                                 }
5497                         }
5498                         SCTP_TCB_UNLOCK(stcb);
5499                 }               /* for each tcb */
5500                 /* remove it from the ep list */
5501                 sctp_remove_laddr(laddr);
5502                 inp->laddr_count--;
5503                 /* update inp_vflag flags */
5504                 sctp_update_ep_vflag(inp);
5505         }
5506         return;
5507 }
5508
5509 /*
5510  * Add the address to the TCB local address restricted list.
5511  * This is a "pending" address list (eg. addresses waiting for an
5512  * ASCONF-ACK response) and cannot be used as a valid source address.
5513  */
5514 void
5515 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5516 {
5517         struct sctp_inpcb *inp;
5518         struct sctp_laddr *laddr;
5519         struct sctpladdr *list;
5520
5521         /*
5522          * Assumes TCB is locked.. and possibly the INP. May need to
5523          * confirm/fix that if we need it and is not the case.
5524          */
5525         list = &stcb->asoc.sctp_restricted_addrs;
5526
5527         inp = stcb->sctp_ep;
5528 #ifdef INET6
5529         if (ifa->address.sa.sa_family == AF_INET6) {
5530                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5531                         /* Can't bind a non-existent addr. */
5532                         return;
5533                 }
5534         }
5535 #endif
5536         /* does the address already exist? */
5537         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5538                 if (laddr->ifa == ifa) {
5539                         return;
5540                 }
5541         }
5542
5543         /* add to the list */
5544         (void)sctp_insert_laddr(list, ifa, 0);
5545         return;
5546 }
5547
5548 /*
5549  * insert an laddr entry with the given ifa for the desired list
5550  */
5551 int
5552 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5553 {
5554         struct sctp_laddr *laddr;
5555
5556         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5557         if (laddr == NULL) {
5558                 /* out of memory? */
5559                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5560                 return (EINVAL);
5561         }
5562         SCTP_INCR_LADDR_COUNT();
5563         bzero(laddr, sizeof(*laddr));
5564         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5565         laddr->ifa = ifa;
5566         laddr->action = act;
5567         atomic_add_int(&ifa->refcount, 1);
5568         /* insert it */
5569         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5570
5571         return (0);
5572 }
5573
5574 /*
5575  * Remove an laddr entry from the local address list (on an assoc)
5576  */
5577 void
5578 sctp_remove_laddr(struct sctp_laddr *laddr)
5579 {
5580
5581         /* remove from the list */
5582         LIST_REMOVE(laddr, sctp_nxt_addr);
5583         sctp_free_ifa(laddr->ifa);
5584         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5585         SCTP_DECR_LADDR_COUNT();
5586 }
5587
5588 /*
5589  * Remove a local address from the TCB local address restricted list
5590  */
5591 void
5592 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5593 {
5594         struct sctp_inpcb *inp;
5595         struct sctp_laddr *laddr;
5596
5597         /*
5598          * This is called by asconf work. It is assumed that a) The TCB is
5599          * locked and b) The INP is locked. This is true in as much as I can
5600          * trace through the entry asconf code where I did these locks.
5601          * Again, the ASCONF code is a bit different in that it does lock
5602          * the INP during its work often times. This must be since we don't
5603          * want other proc's looking up things while what they are looking
5604          * up is changing :-D
5605          */
5606
5607         inp = stcb->sctp_ep;
5608         /* if subset bound and don't allow ASCONF's, can't delete last */
5609         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5610             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5611                 if (stcb->sctp_ep->laddr_count < 2) {
5612                         /* can't delete last address */
5613                         return;
5614                 }
5615         }
5616         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5617                 /* remove the address if it exists */
5618                 if (laddr->ifa == NULL)
5619                         continue;
5620                 if (laddr->ifa == ifa) {
5621                         sctp_remove_laddr(laddr);
5622                         return;
5623                 }
5624         }
5625
5626         /* address not found! */
5627         return;
5628 }
5629
5630 /*
5631  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5632  */
5633 /* sysctl */
5634 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5635 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5636
5637
5638
5639 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5640 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5641 int *sctp_cpuarry = NULL;
5642 void
5643 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5644 {
5645         /* Queue a packet to a processor for the specified core */
5646         struct sctp_mcore_queue *qent;
5647         struct sctp_mcore_ctrl *wkq;
5648         int need_wake = 0;
5649
5650         if (sctp_mcore_workers == NULL) {
5651                 /* Something went way bad during setup */
5652                 sctp_input_with_port(m, off, 0);
5653                 return;
5654         }
5655         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5656             (sizeof(struct sctp_mcore_queue)),
5657             SCTP_M_MCORE);
5658         if (qent == NULL) {
5659                 /* This is trouble  */
5660                 sctp_input_with_port(m, off, 0);
5661                 return;
5662         }
5663         qent->vn = curvnet;
5664         qent->m = m;
5665         qent->off = off;
5666         qent->v6 = 0;
5667         wkq = &sctp_mcore_workers[cpu_to_use];
5668         SCTP_MCORE_QLOCK(wkq);
5669
5670         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5671         if (wkq->running == 0) {
5672                 need_wake = 1;
5673         }
5674         SCTP_MCORE_QUNLOCK(wkq);
5675         if (need_wake) {
5676                 wakeup(&wkq->running);
5677         }
5678 }
5679
5680 static void
5681 sctp_mcore_thread(void *arg)
5682 {
5683
5684         struct sctp_mcore_ctrl *wkq;
5685         struct sctp_mcore_queue *qent;
5686
5687         wkq = (struct sctp_mcore_ctrl *)arg;
5688         struct mbuf *m;
5689         int off, v6;
5690
5691         /* Wait for first tickle */
5692         SCTP_MCORE_LOCK(wkq);
5693         wkq->running = 0;
5694         msleep(&wkq->running,
5695             &wkq->core_mtx,
5696             0, "wait for pkt", 0);
5697         SCTP_MCORE_UNLOCK(wkq);
5698
5699         /* Bind to our cpu */
5700         thread_lock(curthread);
5701         sched_bind(curthread, wkq->cpuid);
5702         thread_unlock(curthread);
5703
5704         /* Now lets start working */
5705         SCTP_MCORE_LOCK(wkq);
5706         /* Now grab lock and go */
5707         while (1) {
5708                 SCTP_MCORE_QLOCK(wkq);
5709 skip_sleep:
5710                 wkq->running = 1;
5711                 qent = TAILQ_FIRST(&wkq->que);
5712                 if (qent) {
5713                         TAILQ_REMOVE(&wkq->que, qent, next);
5714                         SCTP_MCORE_QUNLOCK(wkq);
5715                         CURVNET_SET(qent->vn);
5716                         m = qent->m;
5717                         off = qent->off;
5718                         v6 = qent->v6;
5719                         SCTP_FREE(qent, SCTP_M_MCORE);
5720                         if (v6 == 0) {
5721                                 sctp_input_with_port(m, off, 0);
5722                         } else {
5723                                 printf("V6 not yet supported\n");
5724                                 sctp_m_freem(m);
5725                         }
5726                         CURVNET_RESTORE();
5727                         SCTP_MCORE_QLOCK(wkq);
5728                 }
5729                 wkq->running = 0;
5730                 if (!TAILQ_EMPTY(&wkq->que)) {
5731                         goto skip_sleep;
5732                 }
5733                 SCTP_MCORE_QUNLOCK(wkq);
5734                 msleep(&wkq->running,
5735                     &wkq->core_mtx,
5736                     0, "wait for pkt", 0);
5737         };
5738 }
5739
5740 static void
5741 sctp_startup_mcore_threads(void)
5742 {
5743         int i, cpu;
5744
5745         if (mp_ncpus == 1)
5746                 return;
5747
5748         if (sctp_mcore_workers != NULL) {
5749                 /*
5750                  * Already been here in some previous vnet?
5751                  */
5752                 return;
5753         }
5754         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5755             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5756             SCTP_M_MCORE);
5757         if (sctp_mcore_workers == NULL) {
5758                 /* TSNH I hope */
5759                 return;
5760         }
5761         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5762             sizeof(struct sctp_mcore_ctrl)));
5763         /* Init the structures */
5764         for (i = 0; i <= mp_maxid; i++) {
5765                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5766                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5767                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5768                 sctp_mcore_workers[i].cpuid = i;
5769         }
5770         if (sctp_cpuarry == NULL) {
5771                 SCTP_MALLOC(sctp_cpuarry, int *,
5772                     (mp_ncpus * sizeof(int)),
5773                     SCTP_M_MCORE);
5774                 i = 0;
5775                 CPU_FOREACH(cpu) {
5776                         sctp_cpuarry[i] = cpu;
5777                         i++;
5778                 }
5779         }
5780         /* Now start them all */
5781         CPU_FOREACH(cpu) {
5782                 (void)kproc_create(sctp_mcore_thread,
5783                     (void *)&sctp_mcore_workers[cpu],
5784                     &sctp_mcore_workers[cpu].thread_proc,
5785                     RFPROC,
5786                     SCTP_KTHREAD_PAGES,
5787                     SCTP_MCORE_NAME);
5788
5789         }
5790 }
5791
5792 #endif
5793
5794 void
5795 sctp_pcb_init()
5796 {
5797         /*
5798          * SCTP initialization for the PCB structures should be called by
5799          * the sctp_init() funciton.
5800          */
5801         int i;
5802         struct timeval tv;
5803
5804         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5805                 /* error I was called twice */
5806                 return;
5807         }
5808         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5809
5810 #if defined(SCTP_LOCAL_TRACE_BUF)
5811         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5812 #endif
5813 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5814         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5815             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5816             SCTP_M_MCORE);
5817 #endif
5818         (void)SCTP_GETTIME_TIMEVAL(&tv);
5819 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5820         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5821         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5822         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5823 #else
5824         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5825         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5826         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5827 #endif
5828         /* init the empty list of (All) Endpoints */
5829         LIST_INIT(&SCTP_BASE_INFO(listhead));
5830
5831
5832         /* init the hash table of endpoints */
5833         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5834         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5835         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5836         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5837             &SCTP_BASE_INFO(hashasocmark));
5838         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5839             &SCTP_BASE_INFO(hashmark));
5840         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5841             &SCTP_BASE_INFO(hashtcpmark));
5842         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5843
5844
5845         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5846             &SCTP_BASE_INFO(hashvrfmark));
5847
5848         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5849             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5850         /* init the zones */
5851         /*
5852          * FIX ME: Should check for NULL returns, but if it does fail we are
5853          * doomed to panic anyways... add later maybe.
5854          */
5855         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5856             sizeof(struct sctp_inpcb), maxsockets);
5857
5858         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5859             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5860
5861         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5862             sizeof(struct sctp_laddr),
5863             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5864
5865         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5866             sizeof(struct sctp_nets),
5867             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5868
5869         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5870             sizeof(struct sctp_tmit_chunk),
5871             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5872
5873         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5874             sizeof(struct sctp_queued_to_read),
5875             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5876
5877         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5878             sizeof(struct sctp_stream_queue_pending),
5879             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5880
5881         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5882             sizeof(struct sctp_asconf),
5883             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5884
5885         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5886             sizeof(struct sctp_asconf_ack),
5887             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5888
5889
5890         /* Master Lock INIT for info structure */
5891         SCTP_INP_INFO_LOCK_INIT();
5892         SCTP_STATLOG_INIT_LOCK();
5893
5894         SCTP_IPI_COUNT_INIT();
5895         SCTP_IPI_ADDR_INIT();
5896 #ifdef SCTP_PACKET_LOGGING
5897         SCTP_IP_PKTLOG_INIT();
5898 #endif
5899         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5900
5901         SCTP_WQ_ADDR_INIT();
5902         /* not sure if we need all the counts */
5903         SCTP_BASE_INFO(ipi_count_ep) = 0;
5904         /* assoc/tcb zone info */
5905         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5906         /* local addrlist zone info */
5907         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5908         /* remote addrlist zone info */
5909         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5910         /* chunk info */
5911         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5912
5913         /* socket queue zone info */
5914         SCTP_BASE_INFO(ipi_count_readq) = 0;
5915
5916         /* stream out queue cont */
5917         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5918
5919         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5920         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5921
5922         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5923
5924         /* Init the TIMEWAIT list */
5925         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5926                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5927         }
5928
5929         sctp_startup_iterator();
5930
5931 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5932         sctp_startup_mcore_threads();
5933 #endif
5934
5935         /*
5936          * INIT the default VRF which for BSD is the only one, other O/S's
5937          * may have more. But initially they must start with one and then
5938          * add the VRF's as addresses are added.
5939          */
5940         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5941 }
5942
5943 /*
5944  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5945  */
5946 void
5947 sctp_pcb_finish(void)
5948 {
5949         struct sctp_vrflist *vrf_bucket;
5950         struct sctp_vrf *vrf, *nvrf;
5951         struct sctp_ifn *ifn, *nifn;
5952         struct sctp_ifa *ifa, *nifa;
5953         struct sctpvtaghead *chain;
5954         struct sctp_tagblock *twait_block, *prev_twait_block;
5955         struct sctp_laddr *wi, *nwi;
5956         int i;
5957
5958         /*
5959          * Free BSD the it thread never exits but we do clean up. The only
5960          * way freebsd reaches here if we have VRF's but we still add the
5961          * ifdef to make it compile on old versions.
5962          */
5963         {
5964                 struct sctp_iterator *it, *nit;
5965
5966                 SCTP_IPI_ITERATOR_WQ_LOCK();
5967                 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5968                         if (it->vn != curvnet) {
5969                                 continue;
5970                         }
5971                         TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5972                         if (it->function_atend != NULL) {
5973                                 (*it->function_atend) (it->pointer, it->val);
5974                         }
5975                         SCTP_FREE(it, SCTP_M_ITER);
5976                 }
5977                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5978                 SCTP_ITERATOR_LOCK();
5979                 if ((sctp_it_ctl.cur_it) &&
5980                     (sctp_it_ctl.cur_it->vn == curvnet)) {
5981                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5982                 }
5983                 SCTP_ITERATOR_UNLOCK();
5984         }
5985
5986         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5987         SCTP_WQ_ADDR_LOCK();
5988         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5989                 LIST_REMOVE(wi, sctp_nxt_addr);
5990                 SCTP_DECR_LADDR_COUNT();
5991                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5992         }
5993         SCTP_WQ_ADDR_UNLOCK();
5994
5995         /*
5996          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5997          * destroyed first).
5998          */
5999         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6000         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6001                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6002                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6003                                 /* free the ifa */
6004                                 LIST_REMOVE(ifa, next_bucket);
6005                                 LIST_REMOVE(ifa, next_ifa);
6006                                 SCTP_FREE(ifa, SCTP_M_IFA);
6007                         }
6008                         /* free the ifn */
6009                         LIST_REMOVE(ifn, next_bucket);
6010                         LIST_REMOVE(ifn, next_ifn);
6011                         SCTP_FREE(ifn, SCTP_M_IFN);
6012                 }
6013                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6014                 /* free the vrf */
6015                 LIST_REMOVE(vrf, next_vrf);
6016                 SCTP_FREE(vrf, SCTP_M_VRF);
6017         }
6018         /* free the vrf hashes */
6019         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6020         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6021
6022         /*
6023          * free the TIMEWAIT list elements malloc'd in the function
6024          * sctp_add_vtag_to_timewait()...
6025          */
6026         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6027                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6028                 if (!LIST_EMPTY(chain)) {
6029                         prev_twait_block = NULL;
6030                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6031                                 if (prev_twait_block) {
6032                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6033                                 }
6034                                 prev_twait_block = twait_block;
6035                         }
6036                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6037                 }
6038         }
6039
6040         /* free the locks and mutexes */
6041 #ifdef SCTP_PACKET_LOGGING
6042         SCTP_IP_PKTLOG_DESTROY();
6043 #endif
6044         SCTP_IPI_ADDR_DESTROY();
6045         SCTP_STATLOG_DESTROY();
6046         SCTP_INP_INFO_LOCK_DESTROY();
6047
6048         SCTP_WQ_ADDR_DESTROY();
6049
6050         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6051         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6052         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6053         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6054         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6055         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6056         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6057         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6058         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6059         /* Get rid of other stuff to */
6060         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6061                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6062         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6063                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6064         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6065                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6066 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6067         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6068 #endif
6069 }
6070
6071
6072 int
6073 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6074     int iphlen, int offset, int limit, struct sctphdr *sh,
6075     struct sockaddr *altsa)
6076 {
6077         /*
6078          * grub through the INIT pulling addresses and loading them to the
6079          * nets structure in the asoc. The from address in the mbuf should
6080          * also be loaded (if it is not already). This routine can be called
6081          * with either INIT or INIT-ACK's as long as the m points to the IP
6082          * packet and the offset points to the beginning of the parameters.
6083          */
6084         struct sctp_inpcb *inp, *l_inp;
6085         struct sctp_nets *net, *nnet, *net_tmp;
6086         struct ip *iph;
6087         struct sctp_paramhdr *phdr, parm_buf;
6088         struct sctp_tcb *stcb_tmp;
6089         uint16_t ptype, plen;
6090         struct sockaddr *sa;
6091         struct sockaddr_storage dest_store;
6092         struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
6093         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6094         struct sctp_auth_random *p_random = NULL;
6095         uint16_t random_len = 0;
6096         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6097         struct sctp_auth_hmac_algo *hmacs = NULL;
6098         uint16_t hmacs_len = 0;
6099         uint8_t saw_asconf = 0;
6100         uint8_t saw_asconf_ack = 0;
6101         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6102         struct sctp_auth_chunk_list *chunks = NULL;
6103         uint16_t num_chunks = 0;
6104         sctp_key_t *new_key;
6105         uint32_t keylen;
6106         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6107         uint8_t ecn_allowed;
6108
6109 #ifdef INET
6110         struct sockaddr_in sin;
6111
6112 #endif
6113 #ifdef INET6
6114         struct sockaddr_in6 sin6;
6115
6116 #endif
6117
6118         /* First get the destination address setup too. */
6119 #ifdef INET
6120         memset(&sin, 0, sizeof(sin));
6121         sin.sin_family = AF_INET;
6122         sin.sin_len = sizeof(sin);
6123         sin.sin_port = stcb->rport;
6124 #endif
6125 #ifdef INET6
6126         memset(&sin6, 0, sizeof(sin6));
6127         sin6.sin6_family = AF_INET6;
6128         sin6.sin6_len = sizeof(struct sockaddr_in6);
6129         sin6.sin6_port = stcb->rport;
6130 #endif
6131         if (altsa == NULL) {
6132                 iph = mtod(m, struct ip *);
6133                 switch (iph->ip_v) {
6134 #ifdef INET
6135                 case IPVERSION:
6136                         {
6137                                 /* its IPv4 */
6138                                 struct sockaddr_in *sin_2;
6139
6140                                 sin_2 = (struct sockaddr_in *)(local_sa);
6141                                 memset(sin_2, 0, sizeof(sin));
6142                                 sin_2->sin_family = AF_INET;
6143                                 sin_2->sin_len = sizeof(sin);
6144                                 sin_2->sin_port = sh->dest_port;
6145                                 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
6146                                 sin.sin_addr = iph->ip_src;
6147                                 sa = (struct sockaddr *)&sin;
6148                                 break;
6149                         }
6150 #endif
6151 #ifdef INET6
6152                 case IPV6_VERSION >> 4:
6153                         {
6154                                 /* its IPv6 */
6155                                 struct ip6_hdr *ip6;
6156                                 struct sockaddr_in6 *sin6_2;
6157
6158                                 ip6 = mtod(m, struct ip6_hdr *);
6159                                 sin6_2 = (struct sockaddr_in6 *)(local_sa);
6160                                 memset(sin6_2, 0, sizeof(sin6));
6161                                 sin6_2->sin6_family = AF_INET6;
6162                                 sin6_2->sin6_len = sizeof(struct sockaddr_in6);
6163                                 sin6_2->sin6_port = sh->dest_port;
6164                                 sin6.sin6_addr = ip6->ip6_src;
6165                                 sa = (struct sockaddr *)&sin6;
6166                                 break;
6167                         }
6168 #endif
6169                 default:
6170                         return (-1);
6171                         break;
6172                 }
6173         } else {
6174                 /*
6175                  * For cookies we use the src address NOT from the packet
6176                  * but from the original INIT
6177                  */
6178                 sa = altsa;
6179         }
6180         /* Turn off ECN until we get through all params */
6181         ecn_allowed = 0;
6182         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6183                 /* mark all addresses that we have currently on the list */
6184                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6185         }
6186         /* does the source address already exist? if so skip it */
6187         l_inp = inp = stcb->sctp_ep;
6188
6189         atomic_add_int(&stcb->asoc.refcnt, 1);
6190         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
6191         atomic_add_int(&stcb->asoc.refcnt, -1);
6192
6193         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6194                 /* we must add the source address */
6195                 /* no scope set here since we have a tcb already. */
6196                 switch (sa->sa_family) {
6197 #ifdef INET
6198                 case AF_INET:
6199                         if (stcb->asoc.ipv4_addr_legal) {
6200                                 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6201                                         return (-1);
6202                                 }
6203                         }
6204                         break;
6205 #endif
6206 #ifdef INET6
6207                 case AF_INET6:
6208                         if (stcb->asoc.ipv6_addr_legal) {
6209                                 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6210                                         return (-2);
6211                                 }
6212                         }
6213                         break;
6214 #endif
6215                 default:
6216                         break;
6217                 }
6218         } else {
6219                 if (net_tmp != NULL && stcb_tmp == stcb) {
6220                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6221                 } else if (stcb_tmp != stcb) {
6222                         /* It belongs to another association? */
6223                         if (stcb_tmp)
6224                                 SCTP_TCB_UNLOCK(stcb_tmp);
6225                         return (-3);
6226                 }
6227         }
6228         if (stcb->asoc.state == 0) {
6229                 /* the assoc was freed? */
6230                 return (-4);
6231         }
6232         /*
6233          * peer must explicitly turn this on. This may have been initialized
6234          * to be "on" in order to allow local addr changes while INIT's are
6235          * in flight.
6236          */
6237         stcb->asoc.peer_supports_asconf = 0;
6238         /* now we must go through each of the params. */
6239         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6240         while (phdr) {
6241                 ptype = ntohs(phdr->param_type);
6242                 plen = ntohs(phdr->param_length);
6243                 /*
6244                  * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
6245                  * (int)plen);
6246                  */
6247                 if (offset + plen > limit) {
6248                         break;
6249                 }
6250                 if (plen == 0) {
6251                         break;
6252                 }
6253 #ifdef INET
6254                 if (ptype == SCTP_IPV4_ADDRESS) {
6255                         if (stcb->asoc.ipv4_addr_legal) {
6256                                 struct sctp_ipv4addr_param *p4, p4_buf;
6257
6258                                 /* ok get the v4 address and check/add */
6259                                 phdr = sctp_get_next_param(m, offset,
6260                                     (struct sctp_paramhdr *)&p4_buf,
6261                                     sizeof(p4_buf));
6262                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6263                                     phdr == NULL) {
6264                                         return (-5);
6265                                 }
6266                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6267                                 sin.sin_addr.s_addr = p4->addr;
6268                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6269                                         /* Skip multi-cast addresses */
6270                                         goto next_param;
6271                                 }
6272                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6273                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6274                                         goto next_param;
6275                                 }
6276                                 sa = (struct sockaddr *)&sin;
6277                                 inp = stcb->sctp_ep;
6278                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6279                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6280                                     local_sa, stcb);
6281                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6282
6283                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6284                                     inp == NULL) {
6285                                         /* we must add the source address */
6286                                         /*
6287                                          * no scope set since we have a tcb
6288                                          * already
6289                                          */
6290
6291                                         /*
6292                                          * we must validate the state again
6293                                          * here
6294                                          */
6295                         add_it_now:
6296                                         if (stcb->asoc.state == 0) {
6297                                                 /* the assoc was freed? */
6298                                                 return (-7);
6299                                         }
6300                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6301                                                 return (-8);
6302                                         }
6303                                 } else if (stcb_tmp == stcb) {
6304                                         if (stcb->asoc.state == 0) {
6305                                                 /* the assoc was freed? */
6306                                                 return (-10);
6307                                         }
6308                                         if (net != NULL) {
6309                                                 /* clear flag */
6310                                                 net->dest_state &=
6311                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6312                                         }
6313                                 } else {
6314                                         /*
6315                                          * strange, address is in another
6316                                          * assoc? straighten out locks.
6317                                          */
6318                                         if (stcb_tmp) {
6319                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6320                                                         /*
6321                                                          * in setup state we
6322                                                          * abort this guy
6323                                                          */
6324                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6325                                                             stcb_tmp, 1, NULL, 0);
6326                                                         goto add_it_now;
6327                                                 }
6328                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6329                                         }
6330                                         if (stcb->asoc.state == 0) {
6331                                                 /* the assoc was freed? */
6332                                                 return (-12);
6333                                         }
6334                                         return (-13);
6335                                 }
6336                         }
6337                 } else
6338 #endif
6339 #ifdef INET6
6340                 if (ptype == SCTP_IPV6_ADDRESS) {
6341                         if (stcb->asoc.ipv6_addr_legal) {
6342                                 /* ok get the v6 address and check/add */
6343                                 struct sctp_ipv6addr_param *p6, p6_buf;
6344
6345                                 phdr = sctp_get_next_param(m, offset,
6346                                     (struct sctp_paramhdr *)&p6_buf,
6347                                     sizeof(p6_buf));
6348                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6349                                     phdr == NULL) {
6350                                         return (-14);
6351                                 }
6352                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6353                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6354                                     sizeof(p6->addr));
6355                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6356                                         /* Skip multi-cast addresses */
6357                                         goto next_param;
6358                                 }
6359                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6360                                         /*
6361                                          * Link local make no sense without
6362                                          * scope
6363                                          */
6364                                         goto next_param;
6365                                 }
6366                                 sa = (struct sockaddr *)&sin6;
6367                                 inp = stcb->sctp_ep;
6368                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6369                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6370                                     local_sa, stcb);
6371                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6372                                 if (stcb_tmp == NULL &&
6373                                     (inp == stcb->sctp_ep || inp == NULL)) {
6374                                         /*
6375                                          * we must validate the state again
6376                                          * here
6377                                          */
6378                         add_it_now6:
6379                                         if (stcb->asoc.state == 0) {
6380                                                 /* the assoc was freed? */
6381                                                 return (-16);
6382                                         }
6383                                         /*
6384                                          * we must add the address, no scope
6385                                          * set
6386                                          */
6387                                         if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6388                                                 return (-17);
6389                                         }
6390                                 } else if (stcb_tmp == stcb) {
6391                                         /*
6392                                          * we must validate the state again
6393                                          * here
6394                                          */
6395                                         if (stcb->asoc.state == 0) {
6396                                                 /* the assoc was freed? */
6397                                                 return (-19);
6398                                         }
6399                                         if (net != NULL) {
6400                                                 /* clear flag */
6401                                                 net->dest_state &=
6402                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6403                                         }
6404                                 } else {
6405                                         /*
6406                                          * strange, address is in another
6407                                          * assoc? straighten out locks.
6408                                          */
6409                                         if (stcb_tmp)
6410                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6411                                                         /*
6412                                                          * in setup state we
6413                                                          * abort this guy
6414                                                          */
6415                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6416                                                             stcb_tmp, 1, NULL, 0);
6417                                                         goto add_it_now6;
6418                                                 }
6419                                         SCTP_TCB_UNLOCK(stcb_tmp);
6420
6421                                         if (stcb->asoc.state == 0) {
6422                                                 /* the assoc was freed? */
6423                                                 return (-21);
6424                                         }
6425                                         return (-22);
6426                                 }
6427                         }
6428                 } else
6429 #endif
6430                 if (ptype == SCTP_ECN_CAPABLE) {
6431                         ecn_allowed = 1;
6432                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6433                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6434                                 struct sctp_adaptation_layer_indication ai,
6435                                                                 *aip;
6436
6437                                 phdr = sctp_get_next_param(m, offset,
6438                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6439                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6440                                 if (aip) {
6441                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6442                                         stcb->asoc.adaptation_needed = 1;
6443                                 }
6444                         }
6445                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6446                         struct sctp_asconf_addr_param lstore, *fee;
6447                         int lptype;
6448                         struct sockaddr *lsa = NULL;
6449
6450 #ifdef INET
6451                         struct sctp_asconf_addrv4_param *fii;
6452
6453 #endif
6454
6455                         stcb->asoc.peer_supports_asconf = 1;
6456                         if (plen > sizeof(lstore)) {
6457                                 return (-23);
6458                         }
6459                         phdr = sctp_get_next_param(m, offset,
6460                             (struct sctp_paramhdr *)&lstore,
6461                             min(plen, sizeof(lstore)));
6462                         if (phdr == NULL) {
6463                                 return (-24);
6464                         }
6465                         fee = (struct sctp_asconf_addr_param *)phdr;
6466                         lptype = ntohs(fee->addrp.ph.param_type);
6467                         switch (lptype) {
6468 #ifdef INET
6469                         case SCTP_IPV4_ADDRESS:
6470                                 if (plen !=
6471                                     sizeof(struct sctp_asconf_addrv4_param)) {
6472                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6473                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6474                                             plen);
6475                                 } else {
6476                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6477                                         sin.sin_addr.s_addr = fii->addrp.addr;
6478                                         lsa = (struct sockaddr *)&sin;
6479                                 }
6480                                 break;
6481 #endif
6482 #ifdef INET6
6483                         case SCTP_IPV6_ADDRESS:
6484                                 if (plen !=
6485                                     sizeof(struct sctp_asconf_addr_param)) {
6486                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6487                                             (int)sizeof(struct sctp_asconf_addr_param),
6488                                             plen);
6489                                 } else {
6490                                         memcpy(sin6.sin6_addr.s6_addr,
6491                                             fee->addrp.addr,
6492                                             sizeof(fee->addrp.addr));
6493                                         lsa = (struct sockaddr *)&sin6;
6494                                 }
6495                                 break;
6496 #endif
6497                         default:
6498                                 break;
6499                         }
6500                         if (lsa) {
6501                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6502                         }
6503                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6504                         stcb->asoc.peer_supports_nat = 1;
6505                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6506                         /* Peer supports pr-sctp */
6507                         stcb->asoc.peer_supports_prsctp = 1;
6508                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6509                         /* A supported extension chunk */
6510                         struct sctp_supported_chunk_types_param *pr_supported;
6511                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6512                         int num_ent, i;
6513
6514                         phdr = sctp_get_next_param(m, offset,
6515                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6516                         if (phdr == NULL) {
6517                                 return (-25);
6518                         }
6519                         stcb->asoc.peer_supports_asconf = 0;
6520                         stcb->asoc.peer_supports_prsctp = 0;
6521                         stcb->asoc.peer_supports_pktdrop = 0;
6522                         stcb->asoc.peer_supports_strreset = 0;
6523                         stcb->asoc.peer_supports_nr_sack = 0;
6524                         stcb->asoc.peer_supports_auth = 0;
6525                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6526                         num_ent = plen - sizeof(struct sctp_paramhdr);
6527                         for (i = 0; i < num_ent; i++) {
6528                                 switch (pr_supported->chunk_types[i]) {
6529                                 case SCTP_ASCONF:
6530                                 case SCTP_ASCONF_ACK:
6531                                         stcb->asoc.peer_supports_asconf = 1;
6532                                         break;
6533                                 case SCTP_FORWARD_CUM_TSN:
6534                                         stcb->asoc.peer_supports_prsctp = 1;
6535                                         break;
6536                                 case SCTP_PACKET_DROPPED:
6537                                         stcb->asoc.peer_supports_pktdrop = 1;
6538                                         break;
6539                                 case SCTP_NR_SELECTIVE_ACK:
6540                                         stcb->asoc.peer_supports_nr_sack = 1;
6541                                         break;
6542                                 case SCTP_STREAM_RESET:
6543                                         stcb->asoc.peer_supports_strreset = 1;
6544                                         break;
6545                                 case SCTP_AUTHENTICATION:
6546                                         stcb->asoc.peer_supports_auth = 1;
6547                                         break;
6548                                 default:
6549                                         /* one I have not learned yet */
6550                                         break;
6551
6552                                 }
6553                         }
6554                 } else if (ptype == SCTP_RANDOM) {
6555                         if (plen > sizeof(random_store))
6556                                 break;
6557                         if (got_random) {
6558                                 /* already processed a RANDOM */
6559                                 goto next_param;
6560                         }
6561                         phdr = sctp_get_next_param(m, offset,
6562                             (struct sctp_paramhdr *)random_store,
6563                             min(sizeof(random_store), plen));
6564                         if (phdr == NULL)
6565                                 return (-26);
6566                         p_random = (struct sctp_auth_random *)phdr;
6567                         random_len = plen - sizeof(*p_random);
6568                         /* enforce the random length */
6569                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6570                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6571                                 return (-27);
6572                         }
6573                         got_random = 1;
6574                 } else if (ptype == SCTP_HMAC_LIST) {
6575                         int num_hmacs;
6576                         int i;
6577
6578                         if (plen > sizeof(hmacs_store))
6579                                 break;
6580                         if (got_hmacs) {
6581                                 /* already processed a HMAC list */
6582                                 goto next_param;
6583                         }
6584                         phdr = sctp_get_next_param(m, offset,
6585                             (struct sctp_paramhdr *)hmacs_store,
6586                             min(plen, sizeof(hmacs_store)));
6587                         if (phdr == NULL)
6588                                 return (-28);
6589                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6590                         hmacs_len = plen - sizeof(*hmacs);
6591                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6592                         /* validate the hmac list */
6593                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6594                                 return (-29);
6595                         }
6596                         if (stcb->asoc.peer_hmacs != NULL)
6597                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6598                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6599                         if (stcb->asoc.peer_hmacs != NULL) {
6600                                 for (i = 0; i < num_hmacs; i++) {
6601                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6602                                             ntohs(hmacs->hmac_ids[i]));
6603                                 }
6604                         }
6605                         got_hmacs = 1;
6606                 } else if (ptype == SCTP_CHUNK_LIST) {
6607                         int i;
6608
6609                         if (plen > sizeof(chunks_store))
6610                                 break;
6611                         if (got_chklist) {
6612                                 /* already processed a Chunks list */
6613                                 goto next_param;
6614                         }
6615                         phdr = sctp_get_next_param(m, offset,
6616                             (struct sctp_paramhdr *)chunks_store,
6617                             min(plen, sizeof(chunks_store)));
6618                         if (phdr == NULL)
6619                                 return (-30);
6620                         chunks = (struct sctp_auth_chunk_list *)phdr;
6621                         num_chunks = plen - sizeof(*chunks);
6622                         if (stcb->asoc.peer_auth_chunks != NULL)
6623                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6624                         else
6625                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6626                         for (i = 0; i < num_chunks; i++) {
6627                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6628                                     stcb->asoc.peer_auth_chunks);
6629                                 /* record asconf/asconf-ack if listed */
6630                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6631                                         saw_asconf = 1;
6632                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6633                                         saw_asconf_ack = 1;
6634
6635                         }
6636                         got_chklist = 1;
6637                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6638                             (ptype == SCTP_STATE_COOKIE) ||
6639                             (ptype == SCTP_UNRECOG_PARAM) ||
6640                             (ptype == SCTP_COOKIE_PRESERVE) ||
6641                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6642                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6643                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6644                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6645                     (ptype == SCTP_SUCCESS_REPORT)) {
6646                          /* don't care */ ;
6647                 } else {
6648                         if ((ptype & 0x8000) == 0x0000) {
6649                                 /*
6650                                  * must stop processing the rest of the
6651                                  * param's. Any report bits were handled
6652                                  * with the call to
6653                                  * sctp_arethere_unrecognized_parameters()
6654                                  * when the INIT or INIT-ACK was first seen.
6655                                  */
6656                                 break;
6657                         }
6658                 }
6659
6660 next_param:
6661                 offset += SCTP_SIZE32(plen);
6662                 if (offset >= limit) {
6663                         break;
6664                 }
6665                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6666                     sizeof(parm_buf));
6667         }
6668         /* Now check to see if we need to purge any addresses */
6669         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6670                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6671                     SCTP_ADDR_NOT_IN_ASSOC) {
6672                         /* This address has been removed from the asoc */
6673                         /* remove and free it */
6674                         stcb->asoc.numnets--;
6675                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6676                         sctp_free_remote_addr(net);
6677                         if (net == stcb->asoc.primary_destination) {
6678                                 stcb->asoc.primary_destination = NULL;
6679                                 sctp_select_primary_destination(stcb);
6680                         }
6681                 }
6682         }
6683         if (ecn_allowed == 0) {
6684                 stcb->asoc.ecn_allowed = 0;
6685         }
6686         /* validate authentication required parameters */
6687         if (got_random && got_hmacs) {
6688                 stcb->asoc.peer_supports_auth = 1;
6689         } else {
6690                 stcb->asoc.peer_supports_auth = 0;
6691         }
6692         if (!stcb->asoc.peer_supports_auth && got_chklist) {
6693                 /* peer does not support auth but sent a chunks list? */
6694                 return (-31);
6695         }
6696         if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf &&
6697             !stcb->asoc.peer_supports_auth) {
6698                 /* peer supports asconf but not auth? */
6699                 return (-32);
6700         } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
6701             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6702                 return (-33);
6703         }
6704         /* concatenate the full random key */
6705         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6706         if (chunks != NULL) {
6707                 keylen += sizeof(*chunks) + num_chunks;
6708         }
6709         new_key = sctp_alloc_key(keylen);
6710         if (new_key != NULL) {
6711                 /* copy in the RANDOM */
6712                 if (p_random != NULL) {
6713                         keylen = sizeof(*p_random) + random_len;
6714                         bcopy(p_random, new_key->key, keylen);
6715                 }
6716                 /* append in the AUTH chunks */
6717                 if (chunks != NULL) {
6718                         bcopy(chunks, new_key->key + keylen,
6719                             sizeof(*chunks) + num_chunks);
6720                         keylen += sizeof(*chunks) + num_chunks;
6721                 }
6722                 /* append in the HMACs */
6723                 if (hmacs != NULL) {
6724                         bcopy(hmacs, new_key->key + keylen,
6725                             sizeof(*hmacs) + hmacs_len);
6726                 }
6727         } else {
6728                 /* failed to get memory for the key */
6729                 return (-34);
6730         }
6731         if (stcb->asoc.authinfo.peer_random != NULL)
6732                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6733         stcb->asoc.authinfo.peer_random = new_key;
6734         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6735         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6736
6737         return (0);
6738 }
6739
6740 int
6741 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6742     struct sctp_nets *net)
6743 {
6744         /* make sure the requested primary address exists in the assoc */
6745         if (net == NULL && sa)
6746                 net = sctp_findnet(stcb, sa);
6747
6748         if (net == NULL) {
6749                 /* didn't find the requested primary address! */
6750                 return (-1);
6751         } else {
6752                 /* set the primary address */
6753                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6754                         /* Must be confirmed, so queue to set */
6755                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6756                         return (0);
6757                 }
6758                 stcb->asoc.primary_destination = net;
6759                 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
6760                 net = TAILQ_FIRST(&stcb->asoc.nets);
6761                 if (net != stcb->asoc.primary_destination) {
6762                         /*
6763                          * first one on the list is NOT the primary
6764                          * sctp_cmpaddr() is much more efficient if the
6765                          * primary is the first on the list, make it so.
6766                          */
6767                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6768                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6769                 }
6770                 return (0);
6771         }
6772 }
6773
6774 int
6775 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait)
6776 {
6777         /*
6778          * This function serves two purposes. It will see if a TAG can be
6779          * re-used and return 1 for yes it is ok and 0 for don't use that
6780          * tag. A secondary function it will do is purge out old tags that
6781          * can be removed.
6782          */
6783         struct sctpvtaghead *chain;
6784         struct sctp_tagblock *twait_block;
6785         struct sctpasochead *head;
6786         struct sctp_tcb *stcb;
6787         int i;
6788
6789         SCTP_INP_INFO_RLOCK();
6790         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6791             SCTP_BASE_INFO(hashasocmark))];
6792         if (head == NULL) {
6793                 /* invalid vtag */
6794                 goto skip_vtag_check;
6795         }
6796         LIST_FOREACH(stcb, head, sctp_asocs) {
6797                 /*
6798                  * We choose not to lock anything here. TCB's can't be
6799                  * removed since we have the read lock, so they can't be
6800                  * freed on us, same thing for the INP. I may be wrong with
6801                  * this assumption, but we will go with it for now :-)
6802                  */
6803                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6804                         continue;
6805                 }
6806                 if (stcb->asoc.my_vtag == tag) {
6807                         /* candidate */
6808                         if (stcb->rport != rport) {
6809                                 continue;
6810                         }
6811                         if (stcb->sctp_ep->sctp_lport != lport) {
6812                                 continue;
6813                         }
6814                         /* Its a used tag set */
6815                         SCTP_INP_INFO_RUNLOCK();
6816                         return (0);
6817                 }
6818         }
6819 skip_vtag_check:
6820
6821         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6822         /* Now what about timed wait ? */
6823         if (!LIST_EMPTY(chain)) {
6824                 /*
6825                  * Block(s) are present, lets see if we have this tag in the
6826                  * list
6827                  */
6828                 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6829                         for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6830                                 if (twait_block->vtag_block[i].v_tag == 0) {
6831                                         /* not used */
6832                                         continue;
6833                                 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6834                                     now->tv_sec) {
6835                                         /* Audit expires this guy */
6836                                         twait_block->vtag_block[i].tv_sec_at_expire = 0;
6837                                         twait_block->vtag_block[i].v_tag = 0;
6838                                         twait_block->vtag_block[i].lport = 0;
6839                                         twait_block->vtag_block[i].rport = 0;
6840                                 } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6841                                             (twait_block->vtag_block[i].lport == lport) &&
6842                                     (twait_block->vtag_block[i].rport == rport)) {
6843                                         /* Bad tag, sorry :< */
6844                                         SCTP_INP_INFO_RUNLOCK();
6845                                         return (0);
6846                                 }
6847                         }
6848                 }
6849         }
6850         SCTP_INP_INFO_RUNLOCK();
6851         return (1);
6852 }
6853
6854
6855 static sctp_assoc_t reneged_asoc_ids[256];
6856 static uint8_t reneged_at = 0;
6857
6858
6859 static void
6860 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
6861 {
6862         /*
6863          * We must hunt this association for MBUF's past the cumack (i.e.
6864          * out of order data that we can renege on).
6865          */
6866         struct sctp_association *asoc;
6867         struct sctp_tmit_chunk *chk, *nchk;
6868         uint32_t cumulative_tsn_p1;
6869         struct sctp_queued_to_read *ctl, *nctl;
6870         int cnt, strmat;
6871         uint32_t gap, i;
6872         int fnd = 0;
6873
6874         /* We look for anything larger than the cum-ack + 1 */
6875
6876         asoc = &stcb->asoc;
6877         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6878                 /* none we can reneg on. */
6879                 return;
6880         }
6881         SCTP_STAT_INCR(sctps_protocol_drains_done);
6882         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6883         cnt = 0;
6884         /* First look in the re-assembly queue */
6885         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6886                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6887                         /* Yep it is above cum-ack */
6888                         cnt++;
6889                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6890                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6891                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6892                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6893                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6894                         if (chk->data) {
6895                                 sctp_m_freem(chk->data);
6896                                 chk->data = NULL;
6897                         }
6898                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6899                 }
6900         }
6901         /* Ok that was fun, now we will drain all the inbound streams? */
6902         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6903                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6904                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6905                                 /* Yep it is above cum-ack */
6906                                 cnt++;
6907                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6908                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6909                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6910                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6911                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6912                                 if (ctl->data) {
6913                                         sctp_m_freem(ctl->data);
6914                                         ctl->data = NULL;
6915                                 }
6916                                 sctp_free_remote_addr(ctl->whoFrom);
6917                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6918                                 SCTP_DECR_READQ_COUNT();
6919                         }
6920                 }
6921         }
6922         if (cnt) {
6923                 /* We must back down to see what the new highest is */
6924                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6925                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6926                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6927                                 asoc->highest_tsn_inside_map = i;
6928                                 fnd = 1;
6929                                 break;
6930                         }
6931                 }
6932                 if (!fnd) {
6933                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6934                 }
6935                 /*
6936                  * Question, should we go through the delivery queue? The
6937                  * only reason things are on here is the app not reading OR
6938                  * a p-d-api up. An attacker COULD send enough in to
6939                  * initiate the PD-API and then send a bunch of stuff to
6940                  * other streams... these would wind up on the delivery
6941                  * queue.. and then we would not get to them. But in order
6942                  * to do this I then have to back-track and un-deliver
6943                  * sequence numbers in streams.. el-yucko. I think for now
6944                  * we will NOT look at the delivery queue and leave it to be
6945                  * something to consider later. An alternative would be to
6946                  * abort the P-D-API with a notification and then deliver
6947                  * the data.... Or another method might be to keep track of
6948                  * how many times the situation occurs and if we see a
6949                  * possible attack underway just abort the association.
6950                  */
6951 #ifdef SCTP_DEBUG
6952                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6953 #endif
6954                 /*
6955                  * Now do we need to find a new
6956                  * asoc->highest_tsn_inside_map?
6957                  */
6958                 asoc->last_revoke_count = cnt;
6959                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6960                 /* sa_ignore NO_NULL_CHK */
6961                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6962                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6963                 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
6964                 reneged_at++;
6965         }
6966         /*
6967          * Another issue, in un-setting the TSN's in the mapping array we
6968          * DID NOT adjust the highest_tsn marker.  This will cause one of
6969          * two things to occur. It may cause us to do extra work in checking
6970          * for our mapping array movement. More importantly it may cause us
6971          * to SACK every datagram. This may not be a bad thing though since
6972          * we will recover once we get our cum-ack above and all this stuff
6973          * we dumped recovered.
6974          */
6975 }
6976
6977 void
6978 sctp_drain()
6979 {
6980         /*
6981          * We must walk the PCB lists for ALL associations here. The system
6982          * is LOW on MBUF's and needs help. This is where reneging will
6983          * occur. We really hope this does NOT happen!
6984          */
6985         VNET_ITERATOR_DECL(vnet_iter);
6986         VNET_LIST_RLOCK_NOSLEEP();
6987         VNET_FOREACH(vnet_iter) {
6988                 CURVNET_SET(vnet_iter);
6989                 struct sctp_inpcb *inp;
6990                 struct sctp_tcb *stcb;
6991
6992                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6993                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6994 #ifdef VIMAGE
6995                         continue;
6996 #else
6997                         return;
6998 #endif
6999                 }
7000                 SCTP_INP_INFO_RLOCK();
7001                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7002                         /* For each endpoint */
7003                         SCTP_INP_RLOCK(inp);
7004                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7005                                 /* For each association */
7006                                 SCTP_TCB_LOCK(stcb);
7007                                 sctp_drain_mbufs(inp, stcb);
7008                                 SCTP_TCB_UNLOCK(stcb);
7009                         }
7010                         SCTP_INP_RUNLOCK(inp);
7011                 }
7012                 SCTP_INP_INFO_RUNLOCK();
7013                 CURVNET_RESTORE();
7014         }
7015         VNET_LIST_RUNLOCK_NOSLEEP();
7016 }
7017
7018 /*
7019  * start a new iterator
7020  * iterates through all endpoints and associations based on the pcb_state
7021  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7022  * assocs and "ef" (optional) is executed when the iterator completes.
7023  * "inpf" (optional) is executed for each new endpoint as it is being
7024  * iterated through. inpe (optional) is called when the inp completes
7025  * its way through all the stcbs.
7026  */
7027 int
7028 sctp_initiate_iterator(inp_func inpf,
7029     asoc_func af,
7030     inp_func inpe,
7031     uint32_t pcb_state,
7032     uint32_t pcb_features,
7033     uint32_t asoc_state,
7034     void *argp,
7035     uint32_t argi,
7036     end_func ef,
7037     struct sctp_inpcb *s_inp,
7038     uint8_t chunk_output_off)
7039 {
7040         struct sctp_iterator *it = NULL;
7041
7042         if (af == NULL) {
7043                 return (-1);
7044         }
7045         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7046             SCTP_M_ITER);
7047         if (it == NULL) {
7048                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7049                 return (ENOMEM);
7050         }
7051         memset(it, 0, sizeof(*it));
7052         it->function_assoc = af;
7053         it->function_inp = inpf;
7054         if (inpf)
7055                 it->done_current_ep = 0;
7056         else
7057                 it->done_current_ep = 1;
7058         it->function_atend = ef;
7059         it->pointer = argp;
7060         it->val = argi;
7061         it->pcb_flags = pcb_state;
7062         it->pcb_features = pcb_features;
7063         it->asoc_state = asoc_state;
7064         it->function_inp_end = inpe;
7065         it->no_chunk_output = chunk_output_off;
7066         it->vn = curvnet;
7067         if (s_inp) {
7068                 /* Assume lock is held here */
7069                 it->inp = s_inp;
7070                 SCTP_INP_INCR_REF(it->inp);
7071                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7072         } else {
7073                 SCTP_INP_INFO_RLOCK();
7074                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7075                 if (it->inp) {
7076                         SCTP_INP_INCR_REF(it->inp);
7077                 }
7078                 SCTP_INP_INFO_RUNLOCK();
7079                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7080
7081         }
7082         SCTP_IPI_ITERATOR_WQ_LOCK();
7083
7084         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7085         if (sctp_it_ctl.iterator_running == 0) {
7086                 sctp_wakeup_iterator();
7087         }
7088         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7089         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7090         return (0);
7091 }