sys/netinet/sctp_pcb.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * a) Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  *
  14  * b) Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the distribution.
  17  *
  18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  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 #if defined(INET) || defined(INET6)
  52 #include <netinet/udp.h>
  53 #endif
  54 #ifdef INET6
  55 #include <netinet6/ip6_var.h>
  56 #endif
  57 #include <sys/sched.h>
  58 #include <sys/smp.h>
  59 #include <sys/unistd.h>
  60
  61
  62 VNET_DEFINE(struct sctp_base_info, system_base_info);
  63
  64 /* FIX: we don't handle multiple link local scopes */
  65 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  66 #ifdef INET6
  67 int
  68 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  69 {
  70         struct sockaddr_in6 tmp_a, tmp_b;
  71
  72         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  73         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  74                 return (0);
  75         }
  76         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  77         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  78                 return (0);
  79         }
  80         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  81 }
  82 #endif
  83
  84 void
  85 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  86 {
  87         /*
  88          * We really don't need to lock this, but I will just because it
  89          * does not hurt.
  90          */
  91         SCTP_INP_INFO_RLOCK();
  92         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  93         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  94         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  95         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  96         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  97         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  98         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  99         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
 100         SCTP_INP_INFO_RUNLOCK();
 101 }
 102
 103 /*-
 104  * Addresses are added to VRF's (Virtual Router's). For BSD we
 105  * have only the default VRF 0. We maintain a hash list of
 106  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 107  * these has a list of addresses. When we add a new address
 108  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 109  * not exist we create it and add it to the list of IFN's
 110  * within the VRF. Once we have the sctp_ifn, we add the
 111  * address to the list. So we look something like:
 112  *
 113  * hash-vrf-table
 114  *   vrf-> ifn-> ifn -> ifn
 115  *   vrf    |
 116  *    ...   +--ifa-> ifa -> ifa
 117  *   vrf
 118  *
 119  * We keep these separate lists since the SCTP subsystem will
 120  * point to these from its source address selection nets structure.
 121  * When an address is deleted it does not happen right away on
 122  * the SCTP side, it gets scheduled. What we do when a
 123  * delete happens is immediately remove the address from
 124  * the master list and decrement the refcount. As our
 125  * addip iterator works through and frees the src address
 126  * selection pointing to the sctp_ifa, eventually the refcount
 127  * will reach 0 and we will delete it. Note that it is assumed
 128  * that any locking on system level ifn/ifa is done at the
 129  * caller of these functions and these routines will only
 130  * lock the SCTP structures as they add or delete things.
 131  *
 132  * Other notes on VRF concepts.
 133  *  - An endpoint can be in multiple VRF's
 134  *  - An association lives within a VRF and only one VRF.
 135  *  - Any incoming packet we can deduce the VRF for by
 136  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 137  *  - Any downward send call or connect call must supply the
 138  *    VRF via ancillary data or via some sort of set default
 139  *    VRF socket option call (again for BSD no brainer since
 140  *    the VRF is always 0).
 141  *  - An endpoint may add multiple VRF's to it.
 142  *  - Listening sockets can accept associations in any
 143  *    of the VRF's they are in but the assoc will end up
 144  *    in only one VRF (gotten from the packet or connect/send).
 145  *
 146  */
 147
 148 struct sctp_vrf *
 149 sctp_allocate_vrf(int vrf_id)
 150 {
 151         struct sctp_vrf *vrf = NULL;
 152         struct sctp_vrflist *bucket;
 153
 154         /* First allocate the VRF structure */
 155         vrf = sctp_find_vrf(vrf_id);
 156         if (vrf) {
 157                 /* Already allocated */
 158                 return (vrf);
 159         }
 160         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 161             SCTP_M_VRF);
 162         if (vrf == NULL) {
 163                 /* No memory */
 164 #ifdef INVARIANTS
 165                 panic("No memory for VRF:%d", vrf_id);
 166 #endif
 167                 return (NULL);
 168         }
 169         /* setup the VRF */
 170         memset(vrf, 0, sizeof(struct sctp_vrf));
 171         vrf->vrf_id = vrf_id;
 172         LIST_INIT(&vrf->ifnlist);
 173         vrf->total_ifa_count = 0;
 174         vrf->refcount = 0;
 175         /* now also setup table ids */
 176         SCTP_INIT_VRF_TABLEID(vrf);
 177         /* Init the HASH of addresses */
 178         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 179             &vrf->vrf_addr_hashmark);
 180         if (vrf->vrf_addr_hash == NULL) {
 181                 /* No memory */
 182 #ifdef INVARIANTS
 183                 panic("No memory for VRF:%d", vrf_id);
 184 #endif
 185                 SCTP_FREE(vrf, SCTP_M_VRF);
 186                 return (NULL);
 187         }
 188
 189         /* Add it to the hash table */
 190         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 191         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 192         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 193         return (vrf);
 194 }
 195
 196
 197 struct sctp_ifn *
 198 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 199 {
 200         struct sctp_ifn *sctp_ifnp;
 201         struct sctp_ifnlist *hash_ifn_head;
 202
 203         /*
 204          * We assume the lock is held for the addresses if that's wrong
 205          * problems could occur :-)
 206          */
 207         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 208         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 209                 if (sctp_ifnp->ifn_index == ifn_index) {
 210                         return (sctp_ifnp);
 211                 }
 212                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 213                         return (sctp_ifnp);
 214                 }
 215         }
 216         return (NULL);
 217 }
 218
 219
 220 struct sctp_vrf *
 221 sctp_find_vrf(uint32_t vrf_id)
 222 {
 223         struct sctp_vrflist *bucket;
 224         struct sctp_vrf *liste;
 225
 226         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 227         LIST_FOREACH(liste, bucket, next_vrf) {
 228                 if (vrf_id == liste->vrf_id) {
 229                         return (liste);
 230                 }
 231         }
 232         return (NULL);
 233 }
 234
 235
 236 void
 237 sctp_free_vrf(struct sctp_vrf *vrf)
 238 {
 239         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 240                 if (vrf->vrf_addr_hash) {
 241                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 242                         vrf->vrf_addr_hash = NULL;
 243                 }
 244                 /* We zero'd the count */
 245                 LIST_REMOVE(vrf, next_vrf);
 246                 SCTP_FREE(vrf, SCTP_M_VRF);
 247                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 248         }
 249 }
 250
 251
 252 void
 253 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 254 {
 255         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 256                 /* We zero'd the count */
 257                 if (sctp_ifnp->vrf) {
 258                         sctp_free_vrf(sctp_ifnp->vrf);
 259                 }
 260                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 261                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 262         }
 263 }
 264
 265
 266 void
 267 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 268 {
 269         struct sctp_ifn *sctp_ifnp;
 270
 271         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 272         if (sctp_ifnp != NULL) {
 273                 sctp_ifnp->ifn_mtu = mtu;
 274         }
 275 }
 276
 277
 278 void
 279 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 280 {
 281         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 282                 /* We zero'd the count */
 283                 if (sctp_ifap->ifn_p) {
 284                         sctp_free_ifn(sctp_ifap->ifn_p);
 285                 }
 286                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 287                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 288         }
 289 }
 290
 291
 292 static void
 293 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 294 {
 295         struct sctp_ifn *found;
 296
 297         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 298         if (found == NULL) {
 299                 /* Not in the list.. sorry */
 300                 return;
 301         }
 302         if (hold_addr_lock == 0)
 303                 SCTP_IPI_ADDR_WLOCK();
 304         LIST_REMOVE(sctp_ifnp, next_bucket);
 305         LIST_REMOVE(sctp_ifnp, next_ifn);
 306         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 307             sctp_ifnp->registered_af);
 308         if (hold_addr_lock == 0)
 309                 SCTP_IPI_ADDR_WUNLOCK();
 310         /* Take away the reference, and possibly free it */
 311         sctp_free_ifn(sctp_ifnp);
 312 }
 313
 314
 315 void
 316 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 317     const char *if_name, uint32_t ifn_index)
 318 {
 319         struct sctp_vrf *vrf;
 320         struct sctp_ifa *sctp_ifap;
 321
 322         SCTP_IPI_ADDR_RLOCK();
 323         vrf = sctp_find_vrf(vrf_id);
 324         if (vrf == NULL) {
 325                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 326                 goto out;
 327
 328         }
 329         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 330         if (sctp_ifap == NULL) {
 331                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 332                 goto out;
 333         }
 334         if (sctp_ifap->ifn_p == NULL) {
 335                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 336                 goto out;
 337         }
 338         if (if_name) {
 339                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 340                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 341                             sctp_ifap->ifn_p->ifn_name, if_name);
 342                         goto out;
 343                 }
 344         } else {
 345                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 346                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 347                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 348                         goto out;
 349                 }
 350         }
 351
 352         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 353         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 354 out:
 355         SCTP_IPI_ADDR_RUNLOCK();
 356 }
 357
 358
 359 void
 360 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 361     const char *if_name, uint32_t ifn_index)
 362 {
 363         struct sctp_vrf *vrf;
 364         struct sctp_ifa *sctp_ifap;
 365
 366         SCTP_IPI_ADDR_RLOCK();
 367         vrf = sctp_find_vrf(vrf_id);
 368         if (vrf == NULL) {
 369                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 370                 goto out;
 371
 372         }
 373         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 374         if (sctp_ifap == NULL) {
 375                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 376                 goto out;
 377         }
 378         if (sctp_ifap->ifn_p == NULL) {
 379                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n");
 380                 goto out;
 381         }
 382         if (if_name) {
 383                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 384                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 385                             sctp_ifap->ifn_p->ifn_name, if_name);
 386                         goto out;
 387                 }
 388         } else {
 389                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 390                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 391                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 392                         goto out;
 393                 }
 394         }
 395
 396         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 397         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 398 out:
 399         SCTP_IPI_ADDR_RUNLOCK();
 400 }
 401
 402
 403 /*-
 404  * Add an ifa to an ifn.
 405  * Register the interface as necessary.
 406  * NOTE: ADDR write lock MUST be held.
 407  */
 408 static void
 409 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 410 {
 411         int ifa_af;
 412
 413         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 414         sctp_ifap->ifn_p = sctp_ifnp;
 415         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 416         /* update address counts */
 417         sctp_ifnp->ifa_count++;
 418         ifa_af = sctp_ifap->address.sa.sa_family;
 419         switch (ifa_af) {
 420 #ifdef INET
 421         case AF_INET:
 422                 sctp_ifnp->num_v4++;
 423                 break;
 424 #endif
 425 #ifdef INET6
 426         case AF_INET6:
 427                 sctp_ifnp->num_v6++;
 428                 break;
 429 #endif
 430         default:
 431                 break;
 432         }
 433         if (sctp_ifnp->ifa_count == 1) {
 434                 /* register the new interface */
 435                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 436                 sctp_ifnp->registered_af = ifa_af;
 437         }
 438 }
 439
 440
 441 /*-
 442  * Remove an ifa from its ifn.
 443  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 444  * the interface based on the remaining address families left.
 445  * NOTE: ADDR write lock MUST be held.
 446  */
 447 static void
 448 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 449 {
 450         LIST_REMOVE(sctp_ifap, next_ifa);
 451         if (sctp_ifap->ifn_p) {
 452                 /* update address counts */
 453                 sctp_ifap->ifn_p->ifa_count--;
 454                 switch (sctp_ifap->address.sa.sa_family) {
 455 #ifdef INET
 456                 case AF_INET:
 457                         sctp_ifap->ifn_p->num_v4--;
 458                         break;
 459 #endif
 460 #ifdef INET6
 461                 case AF_INET6:
 462                         sctp_ifap->ifn_p->num_v6--;
 463                         break;
 464 #endif
 465                 default:
 466                         break;
 467                 }
 468
 469                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 470                         /* remove the ifn, possibly freeing it */
 471                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 472                 } else {
 473                         /* re-register address family type, if needed */
 474                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 475                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 476                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 477                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 478                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 479                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 480                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 481                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 482                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 483                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 484                         }
 485                         /* free the ifn refcount */
 486                         sctp_free_ifn(sctp_ifap->ifn_p);
 487                 }
 488                 sctp_ifap->ifn_p = NULL;
 489         }
 490 }
 491
 492
 493 struct sctp_ifa *
 494 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 495     uint32_t ifn_type, const char *if_name, void *ifa,
 496     struct sockaddr *addr, uint32_t ifa_flags,
 497     int dynamic_add)
 498 {
 499         struct sctp_vrf *vrf;
 500         struct sctp_ifn *sctp_ifnp = NULL;
 501         struct sctp_ifa *sctp_ifap = NULL;
 502         struct sctp_ifalist *hash_addr_head;
 503         struct sctp_ifnlist *hash_ifn_head;
 504         uint32_t hash_of_addr;
 505         int new_ifn_af = 0;
 506
 507 #ifdef SCTP_DEBUG
 508         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 509         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 510 #endif
 511         SCTP_IPI_ADDR_WLOCK();
 512         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 513         if (sctp_ifnp) {
 514                 vrf = sctp_ifnp->vrf;
 515         } else {
 516                 vrf = sctp_find_vrf(vrf_id);
 517                 if (vrf == NULL) {
 518                         vrf = sctp_allocate_vrf(vrf_id);
 519                         if (vrf == NULL) {
 520                                 SCTP_IPI_ADDR_WUNLOCK();
 521                                 return (NULL);
 522                         }
 523                 }
 524         }
 525         if (sctp_ifnp == NULL) {
 526                 /*
 527                  * build one and add it, can't hold lock until after malloc
 528                  * done though.
 529                  */
 530                 SCTP_IPI_ADDR_WUNLOCK();
 531                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 532                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 533                 if (sctp_ifnp == NULL) {
 534 #ifdef INVARIANTS
 535                         panic("No memory for IFN");
 536 #endif
 537                         return (NULL);
 538                 }
 539                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 540                 sctp_ifnp->ifn_index = ifn_index;
 541                 sctp_ifnp->ifn_p = ifn;
 542                 sctp_ifnp->ifn_type = ifn_type;
 543                 sctp_ifnp->refcount = 0;
 544                 sctp_ifnp->vrf = vrf;
 545                 atomic_add_int(&vrf->refcount, 1);
 546                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 547                 if (if_name != NULL) {
 548                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 549                 } else {
 550                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 551                 }
 552                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 553                 LIST_INIT(&sctp_ifnp->ifalist);
 554                 SCTP_IPI_ADDR_WLOCK();
 555                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 556                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 557                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 558                 new_ifn_af = 1;
 559         }
 560         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 561         if (sctp_ifap) {
 562                 /* Hmm, it already exists? */
 563                 if ((sctp_ifap->ifn_p) &&
 564                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 565                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 566                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 567                             (void *)sctp_ifap);
 568                         if (new_ifn_af) {
 569                                 /* Remove the created one that we don't want */
 570                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 571                         }
 572                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 573                                 /* easy to solve, just switch back to active */
 574                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 575                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 576                                 sctp_ifap->ifn_p = sctp_ifnp;
 577                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 578                         }
 579         exit_stage_left:
 580                         SCTP_IPI_ADDR_WUNLOCK();
 581                         return (sctp_ifap);
 582                 } else {
 583                         if (sctp_ifap->ifn_p) {
 584                                 /*
 585                                  * The last IFN gets the address, remove the
 586                                  * old one
 587                                  */
 588                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 589                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 590                                     sctp_ifap->ifn_p->ifn_index, if_name,
 591                                     ifn_index);
 592                                 /* remove the address from the old ifn */
 593                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 594                                 /* move the address over to the new ifn */
 595                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 596                                 goto exit_stage_left;
 597                         } else {
 598                                 /* repair ifnp which was NULL ? */
 599                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 600                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 601                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 602                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 603                         }
 604                         goto exit_stage_left;
 605                 }
 606         }
 607         SCTP_IPI_ADDR_WUNLOCK();
 608         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 609         if (sctp_ifap == NULL) {
 610 #ifdef INVARIANTS
 611                 panic("No memory for IFA");
 612 #endif
 613                 return (NULL);
 614         }
 615         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 616         sctp_ifap->ifn_p = sctp_ifnp;
 617         atomic_add_int(&sctp_ifnp->refcount, 1);
 618         sctp_ifap->vrf_id = vrf_id;
 619         sctp_ifap->ifa = ifa;
 620         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 621         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 622         sctp_ifap->flags = ifa_flags;
 623         /* Set scope */
 624         switch (sctp_ifap->address.sa.sa_family) {
 625 #ifdef INET
 626         case AF_INET:
 627                 {
 628                         struct sockaddr_in *sin;
 629
 630                         sin = &sctp_ifap->address.sin;
 631                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 632                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 633                                 sctp_ifap->src_is_loop = 1;
 634                         }
 635                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 636                                 sctp_ifap->src_is_priv = 1;
 637                         }
 638                         sctp_ifnp->num_v4++;
 639                         if (new_ifn_af)
 640                                 new_ifn_af = AF_INET;
 641                         break;
 642                 }
 643 #endif
 644 #ifdef INET6
 645         case AF_INET6:
 646                 {
 647                         /* ok to use deprecated addresses? */
 648                         struct sockaddr_in6 *sin6;
 649
 650                         sin6 = &sctp_ifap->address.sin6;
 651                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 652                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 653                                 sctp_ifap->src_is_loop = 1;
 654                         }
 655                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 656                                 sctp_ifap->src_is_priv = 1;
 657                         }
 658                         sctp_ifnp->num_v6++;
 659                         if (new_ifn_af)
 660                                 new_ifn_af = AF_INET6;
 661                         break;
 662                 }
 663 #endif
 664         default:
 665                 new_ifn_af = 0;
 666                 break;
 667         }
 668         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 669
 670         if ((sctp_ifap->src_is_priv == 0) &&
 671             (sctp_ifap->src_is_loop == 0)) {
 672                 sctp_ifap->src_is_glob = 1;
 673         }
 674         SCTP_IPI_ADDR_WLOCK();
 675         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 676         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 677         sctp_ifap->refcount = 1;
 678         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 679         sctp_ifnp->ifa_count++;
 680         vrf->total_ifa_count++;
 681         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 682         if (new_ifn_af) {
 683                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 684                 sctp_ifnp->registered_af = new_ifn_af;
 685         }
 686         SCTP_IPI_ADDR_WUNLOCK();
 687         if (dynamic_add) {
 688                 /*
 689                  * Bump up the refcount so that when the timer completes it
 690                  * will drop back down.
 691                  */
 692                 struct sctp_laddr *wi;
 693
 694                 atomic_add_int(&sctp_ifap->refcount, 1);
 695                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 696                 if (wi == NULL) {
 697                         /*
 698                          * Gak, what can we do? We have lost an address
 699                          * change can you say HOSED?
 700                          */
 701                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 702                         /* Opps, must decrement the count */
 703                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 704                             if_name);
 705                         return (NULL);
 706                 }
 707                 SCTP_INCR_LADDR_COUNT();
 708                 memset(wi, 0, sizeof(*wi));
 709                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 710                 wi->ifa = sctp_ifap;
 711                 wi->action = SCTP_ADD_IP_ADDRESS;
 712
 713                 SCTP_WQ_ADDR_LOCK();
 714                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 715                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 716                     (struct sctp_inpcb *)NULL,
 717                     (struct sctp_tcb *)NULL,
 718                     (struct sctp_nets *)NULL);
 719                 SCTP_WQ_ADDR_UNLOCK();
 720         } else {
 721                 /* it's ready for use */
 722                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 723         }
 724         return (sctp_ifap);
 725 }
 726
 727 void
 728 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 729     uint32_t ifn_index, const char *if_name)
 730 {
 731         struct sctp_vrf *vrf;
 732         struct sctp_ifa *sctp_ifap = NULL;
 733
 734         SCTP_IPI_ADDR_WLOCK();
 735         vrf = sctp_find_vrf(vrf_id);
 736         if (vrf == NULL) {
 737                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 738                 goto out_now;
 739         }
 740
 741 #ifdef SCTP_DEBUG
 742         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 743         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 744 #endif
 745         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 746         if (sctp_ifap) {
 747                 /* Validate the delete */
 748                 if (sctp_ifap->ifn_p) {
 749                         int valid = 0;
 750
 751                         /*-
 752                          * The name has priority over the ifn_index
 753                          * if its given. We do this especially for
 754                          * panda who might recycle indexes fast.
 755                          */
 756                         if (if_name) {
 757                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 758                                         /* They match its a correct delete */
 759                                         valid = 1;
 760                                 }
 761                         }
 762                         if (!valid) {
 763                                 /* last ditch check ifn_index */
 764                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 765                                         valid = 1;
 766                                 }
 767                         }
 768                         if (!valid) {
 769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 770                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 771                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 772                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 773                                 SCTP_IPI_ADDR_WUNLOCK();
 774                                 return;
 775                         }
 776                 }
 777                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 778                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 779                 /*
 780                  * We don't set the flag. This means that the structure will
 781                  * hang around in EP's that have bound specific to it until
 782                  * they close. This gives us TCP like behavior if someone
 783                  * removes an address (or for that matter adds it right
 784                  * back).
 785                  */
 786                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 787                 vrf->total_ifa_count--;
 788                 LIST_REMOVE(sctp_ifap, next_bucket);
 789                 sctp_remove_ifa_from_ifn(sctp_ifap);
 790         }
 791 #ifdef SCTP_DEBUG
 792         else {
 793                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 794                     ifn_index);
 795                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 796         }
 797 #endif
 798
 799 out_now:
 800         SCTP_IPI_ADDR_WUNLOCK();
 801         if (sctp_ifap) {
 802                 struct sctp_laddr *wi;
 803
 804                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 805                 if (wi == NULL) {
 806                         /*
 807                          * Gak, what can we do? We have lost an address
 808                          * change can you say HOSED?
 809                          */
 810                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 811
 812                         /* Oops, must decrement the count */
 813                         sctp_free_ifa(sctp_ifap);
 814                         return;
 815                 }
 816                 SCTP_INCR_LADDR_COUNT();
 817                 memset(wi, 0, sizeof(*wi));
 818                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 819                 wi->ifa = sctp_ifap;
 820                 wi->action = SCTP_DEL_IP_ADDRESS;
 821                 SCTP_WQ_ADDR_LOCK();
 822                 /*
 823                  * Should this really be a tailq? As it is we will process
 824                  * the newest first :-0
 825                  */
 826                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 827                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 828                     (struct sctp_inpcb *)NULL,
 829                     (struct sctp_tcb *)NULL,
 830                     (struct sctp_nets *)NULL);
 831                 SCTP_WQ_ADDR_UNLOCK();
 832         }
 833         return;
 834 }
 835
 836
 837 static int
 838 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 839 {
 840         int loopback_scope;
 841 #if defined(INET)
 842         int ipv4_local_scope, ipv4_addr_legal;
 843 #endif
 844 #if defined(INET6)
 845         int local_scope, site_scope, ipv6_addr_legal;
 846 #endif
 847         struct sctp_vrf *vrf;
 848         struct sctp_ifn *sctp_ifn;
 849         struct sctp_ifa *sctp_ifa;
 850
 851         loopback_scope = stcb->asoc.scope.loopback_scope;
 852 #if defined(INET)
 853         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 854         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 855 #endif
 856 #if defined(INET6)
 857         local_scope = stcb->asoc.scope.local_scope;
 858         site_scope = stcb->asoc.scope.site_scope;
 859         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 860 #endif
 861
 862         SCTP_IPI_ADDR_RLOCK();
 863         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 864         if (vrf == NULL) {
 865                 /* no vrf, no addresses */
 866                 SCTP_IPI_ADDR_RUNLOCK();
 867                 return (0);
 868         }
 869
 870         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 871                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 872                         if ((loopback_scope == 0) &&
 873                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 874                                 continue;
 875                         }
 876                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 877                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 878                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 879                                         /*
 880                                          * We allow pending addresses, where
 881                                          * we have sent an asconf-add to be
 882                                          * considered valid.
 883                                          */
 884                                         continue;
 885                                 }
 886                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 887                                         continue;
 888                                 }
 889                                 switch (sctp_ifa->address.sa.sa_family) {
 890 #ifdef INET
 891                                 case AF_INET:
 892                                         if (ipv4_addr_legal) {
 893                                                 struct sockaddr_in *sin,
 894                                                            *rsin;
 895
 896                                                 sin = &sctp_ifa->address.sin;
 897                                                 rsin = (struct sockaddr_in *)to;
 898                                                 if ((ipv4_local_scope == 0) &&
 899                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 900                                                         continue;
 901                                                 }
 902                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 903                                                     &sin->sin_addr) != 0) {
 904                                                         continue;
 905                                                 }
 906                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 907                                                         SCTP_IPI_ADDR_RUNLOCK();
 908                                                         return (1);
 909                                                 }
 910                                         }
 911                                         break;
 912 #endif
 913 #ifdef INET6
 914                                 case AF_INET6:
 915                                         if (ipv6_addr_legal) {
 916                                                 struct sockaddr_in6 *sin6,
 917                                                             *rsin6;
 918
 919                                                 sin6 = &sctp_ifa->address.sin6;
 920                                                 rsin6 = (struct sockaddr_in6 *)to;
 921                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 922                                                     &sin6->sin6_addr) != 0) {
 923                                                         continue;
 924                                                 }
 925                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 926                                                         if (local_scope == 0)
 927                                                                 continue;
 928                                                         if (sin6->sin6_scope_id == 0) {
 929                                                                 if (sa6_recoverscope(sin6) != 0)
 930                                                                         continue;
 931                                                         }
 932                                                 }
 933                                                 if ((site_scope == 0) &&
 934                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 935                                                         continue;
 936                                                 }
 937                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 938                                                         SCTP_IPI_ADDR_RUNLOCK();
 939                                                         return (1);
 940                                                 }
 941                                         }
 942                                         break;
 943 #endif
 944                                 default:
 945                                         /* TSNH */
 946                                         break;
 947                                 }
 948                         }
 949                 }
 950         } else {
 951                 struct sctp_laddr *laddr;
 952
 953                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 954                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 955                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 956                                 continue;
 957                         }
 958                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 959                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 960                                 /*
 961                                  * We allow pending addresses, where we have
 962                                  * sent an asconf-add to be considered
 963                                  * valid.
 964                                  */
 965                                 continue;
 966                         }
 967                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 968                                 continue;
 969                         }
 970                         switch (to->sa_family) {
 971 #ifdef INET
 972                         case AF_INET:
 973                                 {
 974                                         struct sockaddr_in *sin, *rsin;
 975
 976                                         sin = &laddr->ifa->address.sin;
 977                                         rsin = (struct sockaddr_in *)to;
 978                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 979                                                 SCTP_IPI_ADDR_RUNLOCK();
 980                                                 return (1);
 981                                         }
 982                                         break;
 983                                 }
 984 #endif
 985 #ifdef INET6
 986                         case AF_INET6:
 987                                 {
 988                                         struct sockaddr_in6 *sin6, *rsin6;
 989
 990                                         sin6 = &laddr->ifa->address.sin6;
 991                                         rsin6 = (struct sockaddr_in6 *)to;
 992                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 993                                                 SCTP_IPI_ADDR_RUNLOCK();
 994                                                 return (1);
 995                                         }
 996                                         break;
 997                                 }
 998
 999 #endif
1000                         default:
1001                                 /* TSNH */
1002                                 break;
1003                         }
1004
1005                 }
1006         }
1007         SCTP_IPI_ADDR_RUNLOCK();
1008         return (0);
1009 }
1010
1011
1012 static struct sctp_tcb *
1013 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1014     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1015 {
1016         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1017         /*
1018          * If we support the TCP model, then we must now dig through to see
1019          * if we can find our endpoint in the list of tcp ep's.
1020          */
1021         uint16_t lport, rport;
1022         struct sctppcbhead *ephead;
1023         struct sctp_inpcb *inp;
1024         struct sctp_laddr *laddr;
1025         struct sctp_tcb *stcb;
1026         struct sctp_nets *net;
1027
1028         if ((to == NULL) || (from == NULL)) {
1029                 return (NULL);
1030         }
1031
1032         switch (to->sa_family) {
1033 #ifdef INET
1034         case AF_INET:
1035                 if (from->sa_family == AF_INET) {
1036                         lport = ((struct sockaddr_in *)to)->sin_port;
1037                         rport = ((struct sockaddr_in *)from)->sin_port;
1038                 } else {
1039                         return (NULL);
1040                 }
1041                 break;
1042 #endif
1043 #ifdef INET6
1044         case AF_INET6:
1045                 if (from->sa_family == AF_INET6) {
1046                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1047                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1048                 } else {
1049                         return (NULL);
1050                 }
1051                 break;
1052 #endif
1053         default:
1054                 return (NULL);
1055         }
1056         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1057         /*
1058          * Ok now for each of the guys in this bucket we must look and see:
1059          * - Does the remote port match. - Does there single association's
1060          * addresses match this address (to). If so we update p_ep to point
1061          * to this ep and return the tcb from it.
1062          */
1063         LIST_FOREACH(inp, ephead, sctp_hash) {
1064                 SCTP_INP_RLOCK(inp);
1065                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 if (lport != inp->sctp_lport) {
1070                         SCTP_INP_RUNLOCK(inp);
1071                         continue;
1072                 }
1073                 switch (to->sa_family) {
1074 #ifdef INET
1075                 case AF_INET:
1076                         {
1077                                 struct sockaddr_in *sin;
1078
1079                                 sin = (struct sockaddr_in *)to;
1080                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1081                                     &sin->sin_addr) != 0) {
1082                                         SCTP_INP_RUNLOCK(inp);
1083                                         continue;
1084                                 }
1085                                 break;
1086                         }
1087 #endif
1088 #ifdef INET6
1089                 case AF_INET6:
1090                         {
1091                                 struct sockaddr_in6 *sin6;
1092
1093                                 sin6 = (struct sockaddr_in6 *)to;
1094                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1095                                     &sin6->sin6_addr) != 0) {
1096                                         SCTP_INP_RUNLOCK(inp);
1097                                         continue;
1098                                 }
1099                                 break;
1100                         }
1101 #endif
1102                 default:
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 if (inp->def_vrf_id != vrf_id) {
1107                         SCTP_INP_RUNLOCK(inp);
1108                         continue;
1109                 }
1110                 /* check to see if the ep has one of the addresses */
1111                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1112                         /* We are NOT bound all, so look further */
1113                         int match = 0;
1114
1115                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1116
1117                                 if (laddr->ifa == NULL) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123                                         continue;
1124                                 }
1125                                 if (laddr->ifa->address.sa.sa_family ==
1126                                     to->sa_family) {
1127                                         /* see if it matches */
1128 #ifdef INET
1129                                         if (from->sa_family == AF_INET) {
1130                                                 struct sockaddr_in *intf_addr,
1131                                                            *sin;
1132
1133                                                 intf_addr = &laddr->ifa->address.sin;
1134                                                 sin = (struct sockaddr_in *)to;
1135                                                 if (sin->sin_addr.s_addr ==
1136                                                     intf_addr->sin_addr.s_addr) {
1137                                                         match = 1;
1138                                                         break;
1139                                                 }
1140                                         }
1141 #endif
1142 #ifdef INET6
1143                                         if (from->sa_family == AF_INET6) {
1144                                                 struct sockaddr_in6 *intf_addr6;
1145                                                 struct sockaddr_in6 *sin6;
1146
1147                                                 sin6 = (struct sockaddr_in6 *)
1148                                                     to;
1149                                                 intf_addr6 = &laddr->ifa->address.sin6;
1150
1151                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152                                                     intf_addr6)) {
1153                                                         match = 1;
1154                                                         break;
1155                                                 }
1156                                         }
1157 #endif
1158                                 }
1159                         }
1160                         if (match == 0) {
1161                                 /* This endpoint does not have this address */
1162                                 SCTP_INP_RUNLOCK(inp);
1163                                 continue;
1164                         }
1165                 }
1166                 /*
1167                  * Ok if we hit here the ep has the address, does it hold
1168                  * the tcb?
1169                  */
1170                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172                 if (stcb == NULL) {
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 SCTP_TCB_LOCK(stcb);
1177                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (stcb->rport != rport) {
1183                         /* remote port does not match. */
1184                         SCTP_TCB_UNLOCK(stcb);
1185                         SCTP_INP_RUNLOCK(inp);
1186                         continue;
1187                 }
1188                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189                         SCTP_TCB_UNLOCK(stcb);
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194                         SCTP_TCB_UNLOCK(stcb);
1195                         SCTP_INP_RUNLOCK(inp);
1196                         continue;
1197                 }
1198                 /* Does this TCB have a matching address? */
1199                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200
1201                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202                                 /* not the same family, can't be a match */
1203                                 continue;
1204                         }
1205                         switch (from->sa_family) {
1206 #ifdef INET
1207                         case AF_INET:
1208                                 {
1209                                         struct sockaddr_in *sin, *rsin;
1210
1211                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1212                                         rsin = (struct sockaddr_in *)from;
1213                                         if (sin->sin_addr.s_addr ==
1214                                             rsin->sin_addr.s_addr) {
1215                                                 /* found it */
1216                                                 if (netp != NULL) {
1217                                                         *netp = net;
1218                                                 }
1219                                                 /*
1220                                                  * Update the endpoint
1221                                                  * pointer
1222                                                  */
1223                                                 *inp_p = inp;
1224                                                 SCTP_INP_RUNLOCK(inp);
1225                                                 return (stcb);
1226                                         }
1227                                         break;
1228                                 }
1229 #endif
1230 #ifdef INET6
1231                         case AF_INET6:
1232                                 {
1233                                         struct sockaddr_in6 *sin6, *rsin6;
1234
1235                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236                                         rsin6 = (struct sockaddr_in6 *)from;
1237                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238                                             rsin6)) {
1239                                                 /* found it */
1240                                                 if (netp != NULL) {
1241                                                         *netp = net;
1242                                                 }
1243                                                 /*
1244                                                  * Update the endpoint
1245                                                  * pointer
1246                                                  */
1247                                                 *inp_p = inp;
1248                                                 SCTP_INP_RUNLOCK(inp);
1249                                                 return (stcb);
1250                                         }
1251                                         break;
1252                                 }
1253 #endif
1254                         default:
1255                                 /* TSNH */
1256                                 break;
1257                         }
1258                 }
1259                 SCTP_TCB_UNLOCK(stcb);
1260                 SCTP_INP_RUNLOCK(inp);
1261         }
1262         return (NULL);
1263 }
1264
1265
1266 /*
1267  * rules for use
1268  *
1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272  * NULL.
1273  */
1274
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279         struct sctpasochead *head;
1280         struct sctp_inpcb *inp;
1281         struct sctp_tcb *stcb = NULL;
1282         struct sctp_nets *net;
1283         uint16_t rport;
1284
1285         inp = *inp_p;
1286         switch (remote->sa_family) {
1287 #ifdef INET
1288         case AF_INET:
1289                 rport = (((struct sockaddr_in *)remote)->sin_port);
1290                 break;
1291 #endif
1292 #ifdef INET6
1293         case AF_INET6:
1294                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295                 break;
1296 #endif
1297         default:
1298                 return (NULL);
1299         }
1300         if (locked_tcb) {
1301                 /*
1302                  * UN-lock so we can do proper locking here this occurs when
1303                  * called from load_addresses_from_init.
1304                  */
1305                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306                 SCTP_TCB_UNLOCK(locked_tcb);
1307         }
1308         SCTP_INP_INFO_RLOCK();
1309         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311                 /*-
1312                  * Now either this guy is our listener or it's the
1313                  * connector. If it is the one that issued the connect, then
1314                  * it's only chance is to be the first TCB in the list. If
1315                  * it is the acceptor, then do the special_lookup to hash
1316                  * and find the real inp.
1317                  */
1318                 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) {
1319                         /* to is peer addr, from is my addr */
1320                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321                             netp, inp->def_vrf_id);
1322                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1323                                 /* we have a locked tcb, lower refcount */
1324                                 SCTP_INP_DECR_REF(inp);
1325                         }
1326                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328                                 SCTP_TCB_LOCK(locked_tcb);
1329                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331                         }
1332                         SCTP_INP_INFO_RUNLOCK();
1333                         return (stcb);
1334                 } else {
1335                         SCTP_INP_WLOCK(inp);
1336                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337                                 goto null_return;
1338                         }
1339                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340                         if (stcb == NULL) {
1341                                 goto null_return;
1342                         }
1343                         SCTP_TCB_LOCK(stcb);
1344
1345                         if (stcb->rport != rport) {
1346                                 /* remote port does not match. */
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355                                 SCTP_TCB_UNLOCK(stcb);
1356                                 goto null_return;
1357                         }
1358                         /* now look at the list of remote addresses */
1359                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1362                                         panic("Corrupt net list");
1363                                 }
1364 #endif
1365                                 if (net->ro._l_addr.sa.sa_family !=
1366                                     remote->sa_family) {
1367                                         /* not the same family */
1368                                         continue;
1369                                 }
1370                                 switch (remote->sa_family) {
1371 #ifdef INET
1372                                 case AF_INET:
1373                                         {
1374                                                 struct sockaddr_in *sin,
1375                                                            *rsin;
1376
1377                                                 sin = (struct sockaddr_in *)
1378                                                     &net->ro._l_addr;
1379                                                 rsin = (struct sockaddr_in *)remote;
1380                                                 if (sin->sin_addr.s_addr ==
1381                                                     rsin->sin_addr.s_addr) {
1382                                                         /* found it */
1383                                                         if (netp != NULL) {
1384                                                                 *netp = net;
1385                                                         }
1386                                                         if (locked_tcb == NULL) {
1387                                                                 SCTP_INP_DECR_REF(inp);
1388                                                         } else if (locked_tcb != stcb) {
1389                                                                 SCTP_TCB_LOCK(locked_tcb);
1390                                                         }
1391                                                         if (locked_tcb) {
1392                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393                                                         }
1394
1395                                                         SCTP_INP_WUNLOCK(inp);
1396                                                         SCTP_INP_INFO_RUNLOCK();
1397                                                         return (stcb);
1398                                                 }
1399                                                 break;
1400                                         }
1401 #endif
1402 #ifdef INET6
1403                                 case AF_INET6:
1404                                         {
1405                                                 struct sockaddr_in6 *sin6,
1406                                                             *rsin6;
1407
1408                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1409                                                 rsin6 = (struct sockaddr_in6 *)remote;
1410                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1411                                                     rsin6)) {
1412                                                         /* found it */
1413                                                         if (netp != NULL) {
1414                                                                 *netp = net;
1415                                                         }
1416                                                         if (locked_tcb == NULL) {
1417                                                                 SCTP_INP_DECR_REF(inp);
1418                                                         } else if (locked_tcb != stcb) {
1419                                                                 SCTP_TCB_LOCK(locked_tcb);
1420                                                         }
1421                                                         if (locked_tcb) {
1422                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1423                                                         }
1424                                                         SCTP_INP_WUNLOCK(inp);
1425                                                         SCTP_INP_INFO_RUNLOCK();
1426                                                         return (stcb);
1427                                                 }
1428                                                 break;
1429                                         }
1430 #endif
1431                                 default:
1432                                         /* TSNH */
1433                                         break;
1434                                 }
1435                         }
1436                         SCTP_TCB_UNLOCK(stcb);
1437                 }
1438         } else {
1439                 SCTP_INP_WLOCK(inp);
1440                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1441                         goto null_return;
1442                 }
1443                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1444                     inp->sctp_hashmark)];
1445                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1446                         if (stcb->rport != rport) {
1447                                 /* remote port does not match */
1448                                 continue;
1449                         }
1450                         SCTP_TCB_LOCK(stcb);
1451                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1452                                 SCTP_TCB_UNLOCK(stcb);
1453                                 continue;
1454                         }
1455                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1456                                 SCTP_TCB_UNLOCK(stcb);
1457                                 continue;
1458                         }
1459                         /* now look at the list of remote addresses */
1460                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1461 #ifdef INVARIANTS
1462                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1463                                         panic("Corrupt net list");
1464                                 }
1465 #endif
1466                                 if (net->ro._l_addr.sa.sa_family !=
1467                                     remote->sa_family) {
1468                                         /* not the same family */
1469                                         continue;
1470                                 }
1471                                 switch (remote->sa_family) {
1472 #ifdef INET
1473                                 case AF_INET:
1474                                         {
1475                                                 struct sockaddr_in *sin,
1476                                                            *rsin;
1477
1478                                                 sin = (struct sockaddr_in *)
1479                                                     &net->ro._l_addr;
1480                                                 rsin = (struct sockaddr_in *)remote;
1481                                                 if (sin->sin_addr.s_addr ==
1482                                                     rsin->sin_addr.s_addr) {
1483                                                         /* found it */
1484                                                         if (netp != NULL) {
1485                                                                 *netp = net;
1486                                                         }
1487                                                         if (locked_tcb == NULL) {
1488                                                                 SCTP_INP_DECR_REF(inp);
1489                                                         } else if (locked_tcb != stcb) {
1490                                                                 SCTP_TCB_LOCK(locked_tcb);
1491                                                         }
1492                                                         if (locked_tcb) {
1493                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1494                                                         }
1495                                                         SCTP_INP_WUNLOCK(inp);
1496                                                         SCTP_INP_INFO_RUNLOCK();
1497                                                         return (stcb);
1498                                                 }
1499                                                 break;
1500                                         }
1501 #endif
1502 #ifdef INET6
1503                                 case AF_INET6:
1504                                         {
1505                                                 struct sockaddr_in6 *sin6,
1506                                                             *rsin6;
1507
1508                                                 sin6 = (struct sockaddr_in6 *)
1509                                                     &net->ro._l_addr;
1510                                                 rsin6 = (struct sockaddr_in6 *)remote;
1511                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1512                                                     rsin6)) {
1513                                                         /* found it */
1514                                                         if (netp != NULL) {
1515                                                                 *netp = net;
1516                                                         }
1517                                                         if (locked_tcb == NULL) {
1518                                                                 SCTP_INP_DECR_REF(inp);
1519                                                         } else if (locked_tcb != stcb) {
1520                                                                 SCTP_TCB_LOCK(locked_tcb);
1521                                                         }
1522                                                         if (locked_tcb) {
1523                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1524                                                         }
1525                                                         SCTP_INP_WUNLOCK(inp);
1526                                                         SCTP_INP_INFO_RUNLOCK();
1527                                                         return (stcb);
1528                                                 }
1529                                                 break;
1530                                         }
1531 #endif
1532                                 default:
1533                                         /* TSNH */
1534                                         break;
1535                                 }
1536                         }
1537                         SCTP_TCB_UNLOCK(stcb);
1538                 }
1539         }
1540 null_return:
1541         /* clean up for returning null */
1542         if (locked_tcb) {
1543                 SCTP_TCB_LOCK(locked_tcb);
1544                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1545         }
1546         SCTP_INP_WUNLOCK(inp);
1547         SCTP_INP_INFO_RUNLOCK();
1548         /* not found */
1549         return (NULL);
1550 }
1551
1552
1553 /*
1554  * Find an association for a specific endpoint using the association id given
1555  * out in the COMM_UP notification
1556  */
1557 struct sctp_tcb *
1558 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1559 {
1560         /*
1561          * Use my the assoc_id to find a endpoint
1562          */
1563         struct sctpasochead *head;
1564         struct sctp_tcb *stcb;
1565         uint32_t id;
1566
1567         if (inp == NULL) {
1568                 SCTP_PRINTF("TSNH ep_associd\n");
1569                 return (NULL);
1570         }
1571         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1572                 SCTP_PRINTF("TSNH ep_associd0\n");
1573                 return (NULL);
1574         }
1575         id = (uint32_t)asoc_id;
1576         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1577         if (head == NULL) {
1578                 /* invalid id TSNH */
1579                 SCTP_PRINTF("TSNH ep_associd1\n");
1580                 return (NULL);
1581         }
1582         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1583                 if (stcb->asoc.assoc_id == id) {
1584                         if (inp != stcb->sctp_ep) {
1585                                 /*
1586                                  * some other guy has the same id active (id
1587                                  * collision ??).
1588                                  */
1589                                 SCTP_PRINTF("TSNH ep_associd2\n");
1590                                 continue;
1591                         }
1592                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1593                                 continue;
1594                         }
1595                         if (want_lock) {
1596                                 SCTP_TCB_LOCK(stcb);
1597                         }
1598                         return (stcb);
1599                 }
1600         }
1601         return (NULL);
1602 }
1603
1604
1605 struct sctp_tcb *
1606 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1607 {
1608         struct sctp_tcb *stcb;
1609
1610         SCTP_INP_RLOCK(inp);
1611         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1612         SCTP_INP_RUNLOCK(inp);
1613         return (stcb);
1614 }
1615
1616
1617 /*
1618  * Endpoint probe expects that the INP_INFO is locked.
1619  */
1620 static struct sctp_inpcb *
1621 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1622     uint16_t lport, uint32_t vrf_id)
1623 {
1624         struct sctp_inpcb *inp;
1625         struct sctp_laddr *laddr;
1626 #ifdef INET
1627         struct sockaddr_in *sin;
1628 #endif
1629 #ifdef INET6
1630         struct sockaddr_in6 *sin6;
1631         struct sockaddr_in6 *intf_addr6;
1632 #endif
1633         int fnd;
1634
1635 #ifdef INET
1636         sin = NULL;
1637 #endif
1638 #ifdef INET6
1639         sin6 = NULL;
1640 #endif
1641         switch (nam->sa_family) {
1642 #ifdef INET
1643         case AF_INET:
1644                 sin = (struct sockaddr_in *)nam;
1645                 break;
1646 #endif
1647 #ifdef INET6
1648         case AF_INET6:
1649                 sin6 = (struct sockaddr_in6 *)nam;
1650                 break;
1651 #endif
1652         default:
1653                 /* unsupported family */
1654                 return (NULL);
1655         }
1656
1657         if (head == NULL)
1658                 return (NULL);
1659
1660         LIST_FOREACH(inp, head, sctp_hash) {
1661                 SCTP_INP_RLOCK(inp);
1662                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1663                         SCTP_INP_RUNLOCK(inp);
1664                         continue;
1665                 }
1666                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1667                     (inp->sctp_lport == lport)) {
1668                         /* got it */
1669                         switch (nam->sa_family) {
1670 #ifdef INET
1671                         case AF_INET:
1672                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1673                                     SCTP_IPV6_V6ONLY(inp)) {
1674                                         /*
1675                                          * IPv4 on a IPv6 socket with ONLY
1676                                          * IPv6 set
1677                                          */
1678                                         SCTP_INP_RUNLOCK(inp);
1679                                         continue;
1680                                 }
1681                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1682                                     &sin->sin_addr) != 0) {
1683                                         SCTP_INP_RUNLOCK(inp);
1684                                         continue;
1685                                 }
1686                                 break;
1687 #endif
1688 #ifdef INET6
1689                         case AF_INET6:
1690                                 /*
1691                                  * A V6 address and the endpoint is NOT
1692                                  * bound V6
1693                                  */
1694                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1695                                         SCTP_INP_RUNLOCK(inp);
1696                                         continue;
1697                                 }
1698                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1699                                     &sin6->sin6_addr) != 0) {
1700                                         SCTP_INP_RUNLOCK(inp);
1701                                         continue;
1702                                 }
1703                                 break;
1704 #endif
1705                         default:
1706                                 break;
1707                         }
1708                         /* does a VRF id match? */
1709                         fnd = 0;
1710                         if (inp->def_vrf_id == vrf_id)
1711                                 fnd = 1;
1712
1713                         SCTP_INP_RUNLOCK(inp);
1714                         if (!fnd)
1715                                 continue;
1716                         return (inp);
1717                 }
1718                 SCTP_INP_RUNLOCK(inp);
1719         }
1720         switch (nam->sa_family) {
1721 #ifdef INET
1722         case AF_INET:
1723                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1724                         /* Can't hunt for one that has no address specified */
1725                         return (NULL);
1726                 }
1727                 break;
1728 #endif
1729 #ifdef INET6
1730         case AF_INET6:
1731                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1732                         /* Can't hunt for one that has no address specified */
1733                         return (NULL);
1734                 }
1735                 break;
1736 #endif
1737         default:
1738                 break;
1739         }
1740         /*
1741          * ok, not bound to all so see if we can find a EP bound to this
1742          * address.
1743          */
1744         LIST_FOREACH(inp, head, sctp_hash) {
1745                 SCTP_INP_RLOCK(inp);
1746                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1747                         SCTP_INP_RUNLOCK(inp);
1748                         continue;
1749                 }
1750                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1751                         SCTP_INP_RUNLOCK(inp);
1752                         continue;
1753                 }
1754                 /*
1755                  * Ok this could be a likely candidate, look at all of its
1756                  * addresses
1757                  */
1758                 if (inp->sctp_lport != lport) {
1759                         SCTP_INP_RUNLOCK(inp);
1760                         continue;
1761                 }
1762                 /* does a VRF id match? */
1763                 fnd = 0;
1764                 if (inp->def_vrf_id == vrf_id)
1765                         fnd = 1;
1766
1767                 if (!fnd) {
1768                         SCTP_INP_RUNLOCK(inp);
1769                         continue;
1770                 }
1771                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1772                         if (laddr->ifa == NULL) {
1773                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1774                                     __func__);
1775                                 continue;
1776                         }
1777                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1778                             (void *)laddr->ifa);
1779                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1780                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1781                                 continue;
1782                         }
1783                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1784                                 /* possible, see if it matches */
1785                                 switch (nam->sa_family) {
1786 #ifdef INET
1787                                 case AF_INET:
1788                                         if (sin->sin_addr.s_addr ==
1789                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1790                                                 SCTP_INP_RUNLOCK(inp);
1791                                                 return (inp);
1792                                         }
1793                                         break;
1794 #endif
1795 #ifdef INET6
1796                                 case AF_INET6:
1797                                         intf_addr6 = &laddr->ifa->address.sin6;
1798                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1799                                             intf_addr6)) {
1800                                                 SCTP_INP_RUNLOCK(inp);
1801                                                 return (inp);
1802                                         }
1803                                         break;
1804 #endif
1805                                 }
1806                         }
1807                 }
1808                 SCTP_INP_RUNLOCK(inp);
1809         }
1810         return (NULL);
1811 }
1812
1813
1814 static struct sctp_inpcb *
1815 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1816 {
1817         struct sctppcbhead *head;
1818         struct sctp_inpcb *t_inp;
1819         int fnd;
1820
1821         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1822             SCTP_BASE_INFO(hashmark))];
1823         LIST_FOREACH(t_inp, head, sctp_hash) {
1824                 if (t_inp->sctp_lport != lport) {
1825                         continue;
1826                 }
1827                 /* is it in the VRF in question */
1828                 fnd = 0;
1829                 if (t_inp->def_vrf_id == vrf_id)
1830                         fnd = 1;
1831                 if (!fnd)
1832                         continue;
1833
1834                 /* This one is in use. */
1835                 /* check the v6/v4 binding issue */
1836                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1837                     SCTP_IPV6_V6ONLY(t_inp)) {
1838                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1839                                 /* collision in V6 space */
1840                                 return (t_inp);
1841                         } else {
1842                                 /* inp is BOUND_V4 no conflict */
1843                                 continue;
1844                         }
1845                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1846                         /* t_inp is bound v4 and v6, conflict always */
1847                         return (t_inp);
1848                 } else {
1849                         /* t_inp is bound only V4 */
1850                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1851                             SCTP_IPV6_V6ONLY(inp)) {
1852                                 /* no conflict */
1853                                 continue;
1854                         }
1855                         /* else fall through to conflict */
1856                 }
1857                 return (t_inp);
1858         }
1859         return (NULL);
1860 }
1861
1862
1863 int
1864 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1865 {
1866         /* For 1-2-1 with port reuse */
1867         struct sctppcbhead *head;
1868         struct sctp_inpcb *tinp, *ninp;
1869
1870         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1871                 /* only works with port reuse on */
1872                 return (-1);
1873         }
1874         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1875                 return (0);
1876         }
1877         SCTP_INP_RUNLOCK(inp);
1878         SCTP_INP_INFO_WLOCK();
1879         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1880             SCTP_BASE_INFO(hashmark))];
1881         /* Kick out all non-listeners to the TCP hash */
1882         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1883                 if (tinp->sctp_lport != inp->sctp_lport) {
1884                         continue;
1885                 }
1886                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1887                         continue;
1888                 }
1889                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1890                         continue;
1891                 }
1892                 if (SCTP_IS_LISTENING(tinp)) {
1893                         continue;
1894                 }
1895                 SCTP_INP_WLOCK(tinp);
1896                 LIST_REMOVE(tinp, sctp_hash);
1897                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1898                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1899                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1900                 SCTP_INP_WUNLOCK(tinp);
1901         }
1902         SCTP_INP_WLOCK(inp);
1903         /* Pull from where he was */
1904         LIST_REMOVE(inp, sctp_hash);
1905         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1906         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1907         LIST_INSERT_HEAD(head, inp, sctp_hash);
1908         SCTP_INP_WUNLOCK(inp);
1909         SCTP_INP_RLOCK(inp);
1910         SCTP_INP_INFO_WUNLOCK();
1911         return (0);
1912 }
1913
1914
1915 struct sctp_inpcb *
1916 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1917     uint32_t vrf_id)
1918 {
1919         /*
1920          * First we check the hash table to see if someone has this port
1921          * bound with just the port.
1922          */
1923         struct sctp_inpcb *inp;
1924         struct sctppcbhead *head;
1925         int lport;
1926         unsigned int i;
1927 #ifdef INET
1928         struct sockaddr_in *sin;
1929 #endif
1930 #ifdef INET6
1931         struct sockaddr_in6 *sin6;
1932 #endif
1933
1934         switch (nam->sa_family) {
1935 #ifdef INET
1936         case AF_INET:
1937                 sin = (struct sockaddr_in *)nam;
1938                 lport = sin->sin_port;
1939                 break;
1940 #endif
1941 #ifdef INET6
1942         case AF_INET6:
1943                 sin6 = (struct sockaddr_in6 *)nam;
1944                 lport = sin6->sin6_port;
1945                 break;
1946 #endif
1947         default:
1948                 return (NULL);
1949         }
1950         /*
1951          * I could cheat here and just cast to one of the types but we will
1952          * do it right. It also provides the check against an Unsupported
1953          * type too.
1954          */
1955         /* Find the head of the ALLADDR chain */
1956         if (have_lock == 0) {
1957                 SCTP_INP_INFO_RLOCK();
1958         }
1959         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1960             SCTP_BASE_INFO(hashmark))];
1961         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1962
1963         /*
1964          * If the TCP model exists it could be that the main listening
1965          * endpoint is gone but there still exists a connected socket for
1966          * this guy. If so we can return the first one that we find. This
1967          * may NOT be the correct one so the caller should be wary on the
1968          * returned INP. Currently the only caller that sets find_tcp_pool
1969          * is in bindx where we are verifying that a user CAN bind the
1970          * address. He either has bound it already, or someone else has, or
1971          * its open to bind, so this is good enough.
1972          */
1973         if (inp == NULL && find_tcp_pool) {
1974                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1975                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1976                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1977                         if (inp) {
1978                                 break;
1979                         }
1980                 }
1981         }
1982         if (inp) {
1983                 SCTP_INP_INCR_REF(inp);
1984         }
1985         if (have_lock == 0) {
1986                 SCTP_INP_INFO_RUNLOCK();
1987         }
1988         return (inp);
1989 }
1990
1991
1992 /*
1993  * Find an association for an endpoint with the pointer to whom you want to
1994  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1995  * need to change the *to to some other struct like a mbuf...
1996  */
1997 struct sctp_tcb *
1998 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
1999     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2000     uint32_t vrf_id)
2001 {
2002         struct sctp_inpcb *inp = NULL;
2003         struct sctp_tcb *stcb;
2004
2005         SCTP_INP_INFO_RLOCK();
2006         if (find_tcp_pool) {
2007                 if (inp_p != NULL) {
2008                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2009                             vrf_id);
2010                 } else {
2011                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2012                             vrf_id);
2013                 }
2014                 if (stcb != NULL) {
2015                         SCTP_INP_INFO_RUNLOCK();
2016                         return (stcb);
2017                 }
2018         }
2019         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2020         if (inp_p != NULL) {
2021                 *inp_p = inp;
2022         }
2023         SCTP_INP_INFO_RUNLOCK();
2024         if (inp == NULL) {
2025                 return (NULL);
2026         }
2027         /*
2028          * ok, we have an endpoint, now lets find the assoc for it (if any)
2029          * we now place the source address or from in the to of the find
2030          * endpoint call. Since in reality this chain is used from the
2031          * inbound packet side.
2032          */
2033         if (inp_p != NULL) {
2034                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2035                     NULL);
2036         } else {
2037                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2038                     NULL);
2039         }
2040         return (stcb);
2041 }
2042
2043
2044 /*
2045  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2046  * find all addresses that the sender has specified in any address list. Each
2047  * address will be used to lookup the TCB and see if one exits.
2048  */
2049 static struct sctp_tcb *
2050 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2051     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2052     struct sockaddr *dst)
2053 {
2054         struct sctp_paramhdr *phdr, param_buf;
2055 #if defined(INET) || defined(INET6)
2056         struct sctp_tcb *stcb;
2057         uint16_t ptype;
2058 #endif
2059         uint16_t plen;
2060 #ifdef INET
2061         struct sockaddr_in sin4;
2062 #endif
2063 #ifdef INET6
2064         struct sockaddr_in6 sin6;
2065 #endif
2066
2067 #ifdef INET
2068         memset(&sin4, 0, sizeof(sin4));
2069         sin4.sin_len = sizeof(sin4);
2070         sin4.sin_family = AF_INET;
2071         sin4.sin_port = sh->src_port;
2072 #endif
2073 #ifdef INET6
2074         memset(&sin6, 0, sizeof(sin6));
2075         sin6.sin6_len = sizeof(sin6);
2076         sin6.sin6_family = AF_INET6;
2077         sin6.sin6_port = sh->src_port;
2078 #endif
2079
2080         offset += sizeof(struct sctp_init_chunk);
2081
2082         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
2083         while (phdr != NULL) {
2084                 /* now we must see if we want the parameter */
2085 #if defined(INET) || defined(INET6)
2086                 ptype = ntohs(phdr->param_type);
2087 #endif
2088                 plen = ntohs(phdr->param_length);
2089                 if (plen == 0) {
2090                         break;
2091                 }
2092 #ifdef INET
2093                 if (ptype == SCTP_IPV4_ADDRESS &&
2094                     plen == sizeof(struct sctp_ipv4addr_param)) {
2095                         /* Get the rest of the address */
2096                         struct sctp_ipv4addr_param ip4_param, *p4;
2097
2098                         phdr = sctp_get_next_param(m, offset,
2099                             (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param));
2100                         if (phdr == NULL) {
2101                                 return (NULL);
2102                         }
2103                         p4 = (struct sctp_ipv4addr_param *)phdr;
2104                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2105                         /* look it up */
2106                         stcb = sctp_findassociation_ep_addr(inp_p,
2107                             (struct sockaddr *)&sin4, netp, dst, NULL);
2108                         if (stcb != NULL) {
2109                                 return (stcb);
2110                         }
2111                 }
2112 #endif
2113 #ifdef INET6
2114                 if (ptype == SCTP_IPV6_ADDRESS &&
2115                     plen == sizeof(struct sctp_ipv6addr_param)) {
2116                         /* Get the rest of the address */
2117                         struct sctp_ipv6addr_param ip6_param, *p6;
2118
2119                         phdr = sctp_get_next_param(m, offset,
2120                             (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param));
2121                         if (phdr == NULL) {
2122                                 return (NULL);
2123                         }
2124                         p6 = (struct sctp_ipv6addr_param *)phdr;
2125                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2126                         /* look it up */
2127                         stcb = sctp_findassociation_ep_addr(inp_p,
2128                             (struct sockaddr *)&sin6, netp, dst, NULL);
2129                         if (stcb != NULL) {
2130                                 return (stcb);
2131                         }
2132                 }
2133 #endif
2134                 offset += SCTP_SIZE32(plen);
2135                 phdr = sctp_get_next_param(m, offset, &param_buf,
2136                     sizeof(param_buf));
2137         }
2138         return (NULL);
2139 }
2140
2141 static struct sctp_tcb *
2142 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2143     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2144     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2145 {
2146         /*
2147          * Use my vtag to hash. If we find it we then verify the source addr
2148          * is in the assoc. If all goes well we save a bit on rec of a
2149          * packet.
2150          */
2151         struct sctpasochead *head;
2152         struct sctp_nets *net;
2153         struct sctp_tcb *stcb;
2154
2155         SCTP_INP_INFO_RLOCK();
2156         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2157             SCTP_BASE_INFO(hashasocmark))];
2158         LIST_FOREACH(stcb, head, sctp_asocs) {
2159                 SCTP_INP_RLOCK(stcb->sctp_ep);
2160                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2161                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2162                         continue;
2163                 }
2164                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2165                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2166                         continue;
2167                 }
2168                 SCTP_TCB_LOCK(stcb);
2169                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2170                 if (stcb->asoc.my_vtag == vtag) {
2171                         /* candidate */
2172                         if (stcb->rport != rport) {
2173                                 SCTP_TCB_UNLOCK(stcb);
2174                                 continue;
2175                         }
2176                         if (stcb->sctp_ep->sctp_lport != lport) {
2177                                 SCTP_TCB_UNLOCK(stcb);
2178                                 continue;
2179                         }
2180                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2181                                 SCTP_TCB_UNLOCK(stcb);
2182                                 continue;
2183                         }
2184                         /* RRS:Need toaddr check here */
2185                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2186                                 /* Endpoint does not own this address */
2187                                 SCTP_TCB_UNLOCK(stcb);
2188                                 continue;
2189                         }
2190                         if (remote_tag) {
2191                                 /*
2192                                  * If we have both vtags that's all we match
2193                                  * on
2194                                  */
2195                                 if (stcb->asoc.peer_vtag == remote_tag) {
2196                                         /*
2197                                          * If both tags match we consider it
2198                                          * conclusive and check NO
2199                                          * source/destination addresses
2200                                          */
2201                                         goto conclusive;
2202                                 }
2203                         }
2204                         if (skip_src_check) {
2205                 conclusive:
2206                                 if (from) {
2207                                         *netp = sctp_findnet(stcb, from);
2208                                 } else {
2209                                         *netp = NULL;   /* unknown */
2210                                 }
2211                                 if (inp_p)
2212                                         *inp_p = stcb->sctp_ep;
2213                                 SCTP_INP_INFO_RUNLOCK();
2214                                 return (stcb);
2215                         }
2216                         net = sctp_findnet(stcb, from);
2217                         if (net) {
2218                                 /* yep its him. */
2219                                 *netp = net;
2220                                 SCTP_STAT_INCR(sctps_vtagexpress);
2221                                 *inp_p = stcb->sctp_ep;
2222                                 SCTP_INP_INFO_RUNLOCK();
2223                                 return (stcb);
2224                         } else {
2225                                 /*
2226                                  * not him, this should only happen in rare
2227                                  * cases so I peg it.
2228                                  */
2229                                 SCTP_STAT_INCR(sctps_vtagbogus);
2230                         }
2231                 }
2232                 SCTP_TCB_UNLOCK(stcb);
2233         }
2234         SCTP_INP_INFO_RUNLOCK();
2235         return (NULL);
2236 }
2237
2238
2239 /*
2240  * Find an association with the pointer to the inbound IP packet. This can be
2241  * a IPv4 or IPv6 packet.
2242  */
2243 struct sctp_tcb *
2244 sctp_findassociation_addr(struct mbuf *m, int offset,
2245     struct sockaddr *src, struct sockaddr *dst,
2246     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2247     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2248 {
2249         struct sctp_tcb *stcb;
2250         struct sctp_inpcb *inp;
2251
2252         if (sh->v_tag) {
2253                 /* we only go down this path if vtag is non-zero */
2254                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2255                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2256                 if (stcb) {
2257                         return (stcb);
2258                 }
2259         }
2260
2261         if (inp_p) {
2262                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2263                     1, vrf_id);
2264                 inp = *inp_p;
2265         } else {
2266                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2267                     1, vrf_id);
2268         }
2269         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2270         if (stcb == NULL && inp) {
2271                 /* Found a EP but not this address */
2272                 if ((ch->chunk_type == SCTP_INITIATION) ||
2273                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2274                         /*-
2275                          * special hook, we do NOT return linp or an
2276                          * association that is linked to an existing
2277                          * association that is under the TCP pool (i.e. no
2278                          * listener exists). The endpoint finding routine
2279                          * will always find a listener before examining the
2280                          * TCP pool.
2281                          */
2282                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2283                                 if (inp_p) {
2284                                         *inp_p = NULL;
2285                                 }
2286                                 return (NULL);
2287                         }
2288                         stcb = sctp_findassociation_special_addr(m,
2289                             offset, sh, &inp, netp, dst);
2290                         if (inp_p != NULL) {
2291                                 *inp_p = inp;
2292                         }
2293                 }
2294         }
2295         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2296         return (stcb);
2297 }
2298
2299 /*
2300  * lookup an association by an ASCONF lookup address.
2301  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2302  */
2303 struct sctp_tcb *
2304 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2305     struct sockaddr *dst, struct sctphdr *sh,
2306     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2307 {
2308         struct sctp_tcb *stcb;
2309         union sctp_sockstore remote_store;
2310         struct sctp_paramhdr param_buf, *phdr;
2311         int ptype;
2312         int zero_address = 0;
2313 #ifdef INET
2314         struct sockaddr_in *sin;
2315 #endif
2316 #ifdef INET6
2317         struct sockaddr_in6 *sin6;
2318 #endif
2319
2320         memset(&remote_store, 0, sizeof(remote_store));
2321         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2322             &param_buf, sizeof(struct sctp_paramhdr));
2323         if (phdr == NULL) {
2324                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2325                     __func__);
2326                 return NULL;
2327         }
2328         ptype = (int)((uint32_t)ntohs(phdr->param_type));
2329         /* get the correlation address */
2330         switch (ptype) {
2331 #ifdef INET6
2332         case SCTP_IPV6_ADDRESS:
2333                 {
2334                         /* ipv6 address param */
2335                         struct sctp_ipv6addr_param *p6, p6_buf;
2336
2337                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2338                                 return NULL;
2339                         }
2340                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2341                             offset + sizeof(struct sctp_asconf_chunk),
2342                             &p6_buf.ph, sizeof(p6_buf));
2343                         if (p6 == NULL) {
2344                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2345                                     __func__);
2346                                 return (NULL);
2347                         }
2348                         sin6 = &remote_store.sin6;
2349                         sin6->sin6_family = AF_INET6;
2350                         sin6->sin6_len = sizeof(*sin6);
2351                         sin6->sin6_port = sh->src_port;
2352                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2353                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2354                                 zero_address = 1;
2355                         break;
2356                 }
2357 #endif
2358 #ifdef INET
2359         case SCTP_IPV4_ADDRESS:
2360                 {
2361                         /* ipv4 address param */
2362                         struct sctp_ipv4addr_param *p4, p4_buf;
2363
2364                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2365                                 return NULL;
2366                         }
2367                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2368                             offset + sizeof(struct sctp_asconf_chunk),
2369                             &p4_buf.ph, sizeof(p4_buf));
2370                         if (p4 == NULL) {
2371                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2372                                     __func__);
2373                                 return (NULL);
2374                         }
2375                         sin = &remote_store.sin;
2376                         sin->sin_family = AF_INET;
2377                         sin->sin_len = sizeof(*sin);
2378                         sin->sin_port = sh->src_port;
2379                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2380                         if (sin->sin_addr.s_addr == INADDR_ANY)
2381                                 zero_address = 1;
2382                         break;
2383                 }
2384 #endif
2385         default:
2386                 /* invalid address param type */
2387                 return NULL;
2388         }
2389
2390         if (zero_address) {
2391                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2392                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2393                 if (stcb != NULL) {
2394                         SCTP_INP_DECR_REF(*inp_p);
2395                 }
2396         } else {
2397                 stcb = sctp_findassociation_ep_addr(inp_p,
2398                     &remote_store.sa, netp,
2399                     dst, NULL);
2400         }
2401         return (stcb);
2402 }
2403
2404
2405 /*
2406  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2407  * addresses. This way if we don't get a bind we by default pick a ephemeral
2408  * port with all addresses bound.
2409  */
2410 int
2411 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2412 {
2413         /*
2414          * we get called when a new endpoint starts up. We need to allocate
2415          * the sctp_inpcb structure from the zone and init it. Mark it as
2416          * unbound and find a port that we can use as an ephemeral with
2417          * INADDR_ANY. If the user binds later no problem we can then add in
2418          * the specific addresses. And setup the default parameters for the
2419          * EP.
2420          */
2421         int i, error;
2422         struct sctp_inpcb *inp;
2423         struct sctp_pcb *m;
2424         struct timeval time;
2425         sctp_sharedkey_t *null_key;
2426
2427         error = 0;
2428
2429         SCTP_INP_INFO_WLOCK();
2430         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2431         if (inp == NULL) {
2432                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2433                 SCTP_INP_INFO_WUNLOCK();
2434                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2435                 return (ENOBUFS);
2436         }
2437         /* zap it */
2438         memset(inp, 0, sizeof(*inp));
2439
2440         /* bump generations */
2441         /* setup socket pointers */
2442         inp->sctp_socket = so;
2443         inp->ip_inp.inp.inp_socket = so;
2444         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2445 #ifdef INET6
2446         if (INP_SOCKAF(so) == AF_INET6) {
2447                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2448                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2449                 }
2450                 if (MODULE_GLOBAL(ip6_v6only)) {
2451                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2452                 }
2453         }
2454 #endif
2455         inp->sctp_associd_counter = 1;
2456         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2457         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2458         inp->max_cwnd = 0;
2459         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2460         inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable);
2461         inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable);
2462         inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable);
2463         inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable);
2464         inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2465         inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2466         inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2467         inp->idata_supported = 0;
2468
2469         inp->fibnum = so->so_fibnum;
2470         /* init the small hash table we use to track asocid <-> tcb */
2471         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2472         if (inp->sctp_asocidhash == NULL) {
2473                 crfree(inp->ip_inp.inp.inp_cred);
2474                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2475                 SCTP_INP_INFO_WUNLOCK();
2476                 return (ENOBUFS);
2477         }
2478         SCTP_INCR_EP_COUNT();
2479         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2480         SCTP_INP_INFO_WUNLOCK();
2481
2482         so->so_pcb = (caddr_t)inp;
2483
2484         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2485                 /* UDP style socket */
2486                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2487                     SCTP_PCB_FLAGS_UNBOUND);
2488                 /* Be sure it is NON-BLOCKING IO for UDP */
2489                 /* SCTP_SET_SO_NBIO(so); */
2490         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2491                 /* TCP style socket */
2492                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2493                     SCTP_PCB_FLAGS_UNBOUND);
2494                 /* Be sure we have blocking IO by default */
2495                 SOCK_LOCK(so);
2496                 SCTP_CLEAR_SO_NBIO(so);
2497                 SOCK_UNLOCK(so);
2498         } else {
2499                 /*
2500                  * unsupported socket type (RAW, etc)- in case we missed it
2501                  * in protosw
2502                  */
2503                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2504                 so->so_pcb = NULL;
2505                 crfree(inp->ip_inp.inp.inp_cred);
2506                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2507                 return (EOPNOTSUPP);
2508         }
2509         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2510                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2511                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2512         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2513                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2514                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2515         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2516                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2517                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2518         }
2519         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2520             &inp->sctp_hashmark);
2521         if (inp->sctp_tcbhash == NULL) {
2522                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2523                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2524                 so->so_pcb = NULL;
2525                 crfree(inp->ip_inp.inp.inp_cred);
2526                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2527                 return (ENOBUFS);
2528         }
2529         inp->def_vrf_id = vrf_id;
2530
2531         SCTP_INP_INFO_WLOCK();
2532         SCTP_INP_LOCK_INIT(inp);
2533         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2534         SCTP_INP_READ_INIT(inp);
2535         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2536         /* lock the new ep */
2537         SCTP_INP_WLOCK(inp);
2538
2539         /* add it to the info area */
2540         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2541         SCTP_INP_INFO_WUNLOCK();
2542
2543         TAILQ_INIT(&inp->read_queue);
2544         LIST_INIT(&inp->sctp_addr_list);
2545
2546         LIST_INIT(&inp->sctp_asoc_list);
2547
2548 #ifdef SCTP_TRACK_FREED_ASOCS
2549         /* TEMP CODE */
2550         LIST_INIT(&inp->sctp_asoc_free_list);
2551 #endif
2552         /* Init the timer structure for signature change */
2553         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2554         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2555
2556         /* now init the actual endpoint default data */
2557         m = &inp->sctp_ep;
2558
2559         /* setup the base timeout information */
2560         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2561         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2562         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2563         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2564         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2565         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2566         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2567         /* all max/min max are in ms */
2568         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2569         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2570         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2571         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2572         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2573         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2574         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2575         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2576         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2577         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2578         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2579         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2580         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2581
2582         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2583         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2584         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2585         /* number of streams to pre-open on a association */
2586         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2587
2588         m->default_mtu = 0;
2589         /* Add adaptation cookie */
2590         m->adaptation_layer_indicator = 0;
2591         m->adaptation_layer_indicator_provided = 0;
2592
2593         /* seed random number generator */
2594         m->random_counter = 1;
2595         m->store_at = SCTP_SIGNATURE_SIZE;
2596         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2597         sctp_fill_random_store(m);
2598
2599         /* Minimum cookie size */
2600         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2601             sizeof(struct sctp_state_cookie);
2602         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2603
2604         /* Setup the initial secret */
2605         (void)SCTP_GETTIME_TIMEVAL(&time);
2606         m->time_of_secret_change = time.tv_sec;
2607
2608         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2609                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2610         }
2611         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2612
2613         /* How long is a cookie good for ? */
2614         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2615         /*
2616          * Initialize authentication parameters
2617          */
2618         m->local_hmacs = sctp_default_supported_hmaclist();
2619         m->local_auth_chunks = sctp_alloc_chunklist();
2620         if (inp->asconf_supported) {
2621                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2622                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2623         }
2624         m->default_dscp = 0;
2625 #ifdef INET6
2626         m->default_flowlabel = 0;
2627 #endif
2628         m->port = 0;            /* encapsulation disabled by default */
2629         LIST_INIT(&m->shared_keys);
2630         /* add default NULL key as key id 0 */
2631         null_key = sctp_alloc_sharedkey();
2632         sctp_insert_sharedkey(&m->shared_keys, null_key);
2633         SCTP_INP_WUNLOCK(inp);
2634 #ifdef SCTP_LOG_CLOSING
2635         sctp_log_closing(inp, NULL, 12);
2636 #endif
2637         return (error);
2638 }
2639
2640
2641 void
2642 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2643     struct sctp_tcb *stcb)
2644 {
2645         struct sctp_nets *net;
2646         uint16_t lport, rport;
2647         struct sctppcbhead *head;
2648         struct sctp_laddr *laddr, *oladdr;
2649
2650         atomic_add_int(&stcb->asoc.refcnt, 1);
2651         SCTP_TCB_UNLOCK(stcb);
2652         SCTP_INP_INFO_WLOCK();
2653         SCTP_INP_WLOCK(old_inp);
2654         SCTP_INP_WLOCK(new_inp);
2655         SCTP_TCB_LOCK(stcb);
2656         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2657
2658         new_inp->sctp_ep.time_of_secret_change =
2659             old_inp->sctp_ep.time_of_secret_change;
2660         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2661             sizeof(old_inp->sctp_ep.secret_key));
2662         new_inp->sctp_ep.current_secret_number =
2663             old_inp->sctp_ep.current_secret_number;
2664         new_inp->sctp_ep.last_secret_number =
2665             old_inp->sctp_ep.last_secret_number;
2666         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2667
2668         /* make it so new data pours into the new socket */
2669         stcb->sctp_socket = new_inp->sctp_socket;
2670         stcb->sctp_ep = new_inp;
2671
2672         /* Copy the port across */
2673         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2674         rport = stcb->rport;
2675         /* Pull the tcb from the old association */
2676         LIST_REMOVE(stcb, sctp_tcbhash);
2677         LIST_REMOVE(stcb, sctp_tcblist);
2678         if (stcb->asoc.in_asocid_hash) {
2679                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2680         }
2681         /* Now insert the new_inp into the TCP connected hash */
2682         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2683
2684         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2685         /* Its safe to access */
2686         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2687
2688         /* Now move the tcb into the endpoint list */
2689         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2690         /*
2691          * Question, do we even need to worry about the ep-hash since we
2692          * only have one connection? Probably not :> so lets get rid of it
2693          * and not suck up any kernel memory in that.
2694          */
2695         if (stcb->asoc.in_asocid_hash) {
2696                 struct sctpasochead *lhd;
2697
2698                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2699                     new_inp->hashasocidmark)];
2700                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2701         }
2702         /* Ok. Let's restart timer. */
2703         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2704                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2705                     stcb, net);
2706         }
2707
2708         SCTP_INP_INFO_WUNLOCK();
2709         if (new_inp->sctp_tcbhash != NULL) {
2710                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2711                 new_inp->sctp_tcbhash = NULL;
2712         }
2713         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2714                 /* Subset bound, so copy in the laddr list from the old_inp */
2715                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2716                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2717                         if (laddr == NULL) {
2718                                 /*
2719                                  * Gak, what can we do? This assoc is really
2720                                  * HOSED. We probably should send an abort
2721                                  * here.
2722                                  */
2723                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2724                                 continue;
2725                         }
2726                         SCTP_INCR_LADDR_COUNT();
2727                         memset(laddr, 0, sizeof(*laddr));
2728                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2729                         laddr->ifa = oladdr->ifa;
2730                         atomic_add_int(&laddr->ifa->refcount, 1);
2731                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2732                             sctp_nxt_addr);
2733                         new_inp->laddr_count++;
2734                         if (oladdr == stcb->asoc.last_used_address) {
2735                                 stcb->asoc.last_used_address = laddr;
2736                         }
2737                 }
2738         }
2739         /*
2740          * Now any running timers need to be adjusted since we really don't
2741          * care if they are running or not just blast in the new_inp into
2742          * all of them.
2743          */
2744
2745         stcb->asoc.dack_timer.ep = (void *)new_inp;
2746         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2747         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2748         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2749         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2750         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2751         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2752         /* now what about the nets? */
2753         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2754                 net->pmtu_timer.ep = (void *)new_inp;
2755                 net->hb_timer.ep = (void *)new_inp;
2756                 net->rxt_timer.ep = (void *)new_inp;
2757         }
2758         SCTP_INP_WUNLOCK(new_inp);
2759         SCTP_INP_WUNLOCK(old_inp);
2760 }
2761
2762 /*
2763  * insert an laddr entry with the given ifa for the desired list
2764  */
2765 static int
2766 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2767 {
2768         struct sctp_laddr *laddr;
2769
2770         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2771         if (laddr == NULL) {
2772                 /* out of memory? */
2773                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2774                 return (EINVAL);
2775         }
2776         SCTP_INCR_LADDR_COUNT();
2777         memset(laddr, 0, sizeof(*laddr));
2778         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2779         laddr->ifa = ifa;
2780         laddr->action = act;
2781         atomic_add_int(&ifa->refcount, 1);
2782         /* insert it */
2783         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2784
2785         return (0);
2786 }
2787
2788 /*
2789  * Remove an laddr entry from the local address list (on an assoc)
2790  */
2791 static void
2792 sctp_remove_laddr(struct sctp_laddr *laddr)
2793 {
2794
2795         /* remove from the list */
2796         LIST_REMOVE(laddr, sctp_nxt_addr);
2797         sctp_free_ifa(laddr->ifa);
2798         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2799         SCTP_DECR_LADDR_COUNT();
2800 }
2801
2802
2803
2804 /* sctp_ifap is used to bypass normal local address validation checks */
2805 int
2806 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2807     struct sctp_ifa *sctp_ifap, struct thread *p)
2808 {
2809         /* bind a ep to a socket address */
2810         struct sctppcbhead *head;
2811         struct sctp_inpcb *inp, *inp_tmp;
2812         struct inpcb *ip_inp;
2813         int port_reuse_active = 0;
2814         int bindall;
2815         uint16_t lport;
2816         int error;
2817         uint32_t vrf_id;
2818
2819         lport = 0;
2820         bindall = 1;
2821         inp = (struct sctp_inpcb *)so->so_pcb;
2822         ip_inp = (struct inpcb *)so->so_pcb;
2823 #ifdef SCTP_DEBUG
2824         if (addr) {
2825                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2826                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2827                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2828                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2829         }
2830 #endif
2831         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2832                 /* already did a bind, subsequent binds NOT allowed ! */
2833                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2834                 return (EINVAL);
2835         }
2836 #ifdef INVARIANTS
2837         if (p == NULL)
2838                 panic("null proc/thread");
2839 #endif
2840         if (addr != NULL) {
2841                 switch (addr->sa_family) {
2842 #ifdef INET
2843                 case AF_INET:
2844                         {
2845                                 struct sockaddr_in *sin;
2846
2847                                 /* IPV6_V6ONLY socket? */
2848                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2849                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2850                                         return (EINVAL);
2851                                 }
2852                                 if (addr->sa_len != sizeof(*sin)) {
2853                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2854                                         return (EINVAL);
2855                                 }
2856
2857                                 sin = (struct sockaddr_in *)addr;
2858                                 lport = sin->sin_port;
2859                                 /*
2860                                  * For LOOPBACK the prison_local_ip4() call
2861                                  * will transmute the ip address to the
2862                                  * proper value.
2863                                  */
2864                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2865                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2866                                         return (error);
2867                                 }
2868                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2869                                         bindall = 0;
2870                                 }
2871                                 break;
2872                         }
2873 #endif
2874 #ifdef INET6
2875                 case AF_INET6:
2876                         {
2877                                 /*
2878                                  * Only for pure IPv6 Address. (No IPv4
2879                                  * Mapped!)
2880                                  */
2881                                 struct sockaddr_in6 *sin6;
2882
2883                                 sin6 = (struct sockaddr_in6 *)addr;
2884
2885                                 if (addr->sa_len != sizeof(*sin6)) {
2886                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2887                                         return (EINVAL);
2888                                 }
2889                                 lport = sin6->sin6_port;
2890                                 /*
2891                                  * For LOOPBACK the prison_local_ip6() call
2892                                  * will transmute the ipv6 address to the
2893                                  * proper value.
2894                                  */
2895                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2896                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2897                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2898                                         return (error);
2899                                 }
2900                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2901                                         bindall = 0;
2902                                         /* KAME hack: embed scopeid */
2903                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2904                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2905                                                 return (EINVAL);
2906                                         }
2907                                 }
2908                                 /* this must be cleared for ifa_ifwithaddr() */
2909                                 sin6->sin6_scope_id = 0;
2910                                 break;
2911                         }
2912 #endif
2913                 default:
2914                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2915                         return (EAFNOSUPPORT);
2916                 }
2917         }
2918         SCTP_INP_INFO_WLOCK();
2919         SCTP_INP_WLOCK(inp);
2920         /* Setup a vrf_id to be the default for the non-bind-all case. */
2921         vrf_id = inp->def_vrf_id;
2922
2923         /* increase our count due to the unlock we do */
2924         SCTP_INP_INCR_REF(inp);
2925         if (lport) {
2926                 /*
2927                  * Did the caller specify a port? if so we must see if an ep
2928                  * already has this one bound.
2929                  */
2930                 /* got to be root to get at low ports */
2931                 if (ntohs(lport) < IPPORT_RESERVED) {
2932                         if ((p != NULL) && ((error =
2933                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2934                             ) != 0)) {
2935                                 SCTP_INP_DECR_REF(inp);
2936                                 SCTP_INP_WUNLOCK(inp);
2937                                 SCTP_INP_INFO_WUNLOCK();
2938                                 return (error);
2939                         }
2940                 }
2941                 SCTP_INP_WUNLOCK(inp);
2942                 if (bindall) {
2943                         vrf_id = inp->def_vrf_id;
2944                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2945                         if (inp_tmp != NULL) {
2946                                 /*
2947                                  * lock guy returned and lower count note
2948                                  * that we are not bound so inp_tmp should
2949                                  * NEVER be inp. And it is this inp
2950                                  * (inp_tmp) that gets the reference bump,
2951                                  * so we must lower it.
2952                                  */
2953                                 SCTP_INP_DECR_REF(inp_tmp);
2954                                 /* unlock info */
2955                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2956                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2957                                         /*
2958                                          * Ok, must be one-2-one and
2959                                          * allowing port re-use
2960                                          */
2961                                         port_reuse_active = 1;
2962                                         goto continue_anyway;
2963                                 }
2964                                 SCTP_INP_DECR_REF(inp);
2965                                 SCTP_INP_INFO_WUNLOCK();
2966                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2967                                 return (EADDRINUSE);
2968                         }
2969                 } else {
2970                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2971                         if (inp_tmp != NULL) {
2972                                 /*
2973                                  * lock guy returned and lower count note
2974                                  * that we are not bound so inp_tmp should
2975                                  * NEVER be inp. And it is this inp
2976                                  * (inp_tmp) that gets the reference bump,
2977                                  * so we must lower it.
2978                                  */
2979                                 SCTP_INP_DECR_REF(inp_tmp);
2980                                 /* unlock info */
2981                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2982                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2983                                         /*
2984                                          * Ok, must be one-2-one and
2985                                          * allowing port re-use
2986                                          */
2987                                         port_reuse_active = 1;
2988                                         goto continue_anyway;
2989                                 }
2990                                 SCTP_INP_DECR_REF(inp);
2991                                 SCTP_INP_INFO_WUNLOCK();
2992                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2993                                 return (EADDRINUSE);
2994                         }
2995                 }
2996 continue_anyway:
2997                 SCTP_INP_WLOCK(inp);
2998                 if (bindall) {
2999                         /* verify that no lport is not used by a singleton */
3000                         if ((port_reuse_active == 0) &&
3001                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3002                                 /* Sorry someone already has this one bound */
3003                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3004                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3005                                         port_reuse_active = 1;
3006                                 } else {
3007                                         SCTP_INP_DECR_REF(inp);
3008                                         SCTP_INP_WUNLOCK(inp);
3009                                         SCTP_INP_INFO_WUNLOCK();
3010                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3011                                         return (EADDRINUSE);
3012                                 }
3013                         }
3014                 }
3015         } else {
3016                 uint16_t first, last, candidate;
3017                 uint16_t count;
3018                 int done;
3019
3020                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3021                         first = MODULE_GLOBAL(ipport_hifirstauto);
3022                         last = MODULE_GLOBAL(ipport_hilastauto);
3023                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3024                         if (p && (error =
3025                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3026                             )) {
3027                                 SCTP_INP_DECR_REF(inp);
3028                                 SCTP_INP_WUNLOCK(inp);
3029                                 SCTP_INP_INFO_WUNLOCK();
3030                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3031                                 return (error);
3032                         }
3033                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3034                         last = MODULE_GLOBAL(ipport_lowlastauto);
3035                 } else {
3036                         first = MODULE_GLOBAL(ipport_firstauto);
3037                         last = MODULE_GLOBAL(ipport_lastauto);
3038                 }
3039                 if (first > last) {
3040                         uint16_t temp;
3041
3042                         temp = first;
3043                         first = last;
3044                         last = temp;
3045                 }
3046                 count = last - first + 1;       /* number of candidates */
3047                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3048
3049                 done = 0;
3050                 while (!done) {
3051                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3052                                 done = 1;
3053                         }
3054                         if (!done) {
3055                                 if (--count == 0) {
3056                                         SCTP_INP_DECR_REF(inp);
3057                                         SCTP_INP_WUNLOCK(inp);
3058                                         SCTP_INP_INFO_WUNLOCK();
3059                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3060                                         return (EADDRINUSE);
3061                                 }
3062                                 if (candidate == last)
3063                                         candidate = first;
3064                                 else
3065                                         candidate = candidate + 1;
3066                         }
3067                 }
3068                 lport = htons(candidate);
3069         }
3070         SCTP_INP_DECR_REF(inp);
3071         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3072             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3073                 /*
3074                  * this really should not happen. The guy did a non-blocking
3075                  * bind and then did a close at the same time.
3076                  */
3077                 SCTP_INP_WUNLOCK(inp);
3078                 SCTP_INP_INFO_WUNLOCK();
3079                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3080                 return (EINVAL);
3081         }
3082         /* ok we look clear to give out this port, so lets setup the binding */
3083         if (bindall) {
3084                 /* binding to all addresses, so just set in the proper flags */
3085                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3086                 /* set the automatic addr changes from kernel flag */
3087                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3088                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3089                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3090                 } else {
3091                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3092                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3093                 }
3094                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3095                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3096                 } else {
3097                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3098                 }
3099                 /*
3100                  * set the automatic mobility_base from kernel flag (by
3101                  * micchie)
3102                  */
3103                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3105                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3106                 } else {
3107                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3108                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3109                 }
3110                 /*
3111                  * set the automatic mobility_fasthandoff from kernel flag
3112                  * (by micchie)
3113                  */
3114                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3115                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3116                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3117                 } else {
3118                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3119                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3120                 }
3121         } else {
3122                 /*
3123                  * bind specific, make sure flags is off and add a new
3124                  * address structure to the sctp_addr_list inside the ep
3125                  * structure.
3126                  *
3127                  * We will need to allocate one and insert it at the head.
3128                  * The socketopt call can just insert new addresses in there
3129                  * as well. It will also have to do the embed scope kame
3130                  * hack too (before adding).
3131                  */
3132                 struct sctp_ifa *ifa;
3133                 union sctp_sockstore store;
3134
3135                 memset(&store, 0, sizeof(store));
3136                 switch (addr->sa_family) {
3137 #ifdef INET
3138                 case AF_INET:
3139                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3140                         store.sin.sin_port = 0;
3141                         break;
3142 #endif
3143 #ifdef INET6
3144                 case AF_INET6:
3145                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3146                         store.sin6.sin6_port = 0;
3147                         break;
3148 #endif
3149                 default:
3150                         break;
3151                 }
3152                 /*
3153                  * first find the interface with the bound address need to
3154                  * zero out the port to find the address! yuck! can't do
3155                  * this earlier since need port for sctp_pcb_findep()
3156                  */
3157                 if (sctp_ifap != NULL) {
3158                         ifa = sctp_ifap;
3159                 } else {
3160                         /*
3161                          * Note for BSD we hit here always other O/S's will
3162                          * pass things in via the sctp_ifap argument
3163                          * (Panda).
3164                          */
3165                         ifa = sctp_find_ifa_by_addr(&store.sa,
3166                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3167                 }
3168                 if (ifa == NULL) {
3169                         /* Can't find an interface with that address */
3170                         SCTP_INP_WUNLOCK(inp);
3171                         SCTP_INP_INFO_WUNLOCK();
3172                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3173                         return (EADDRNOTAVAIL);
3174                 }
3175 #ifdef INET6
3176                 if (addr->sa_family == AF_INET6) {
3177                         /* GAK, more FIXME IFA lock? */
3178                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3179                                 /* Can't bind a non-existent addr. */
3180                                 SCTP_INP_WUNLOCK(inp);
3181                                 SCTP_INP_INFO_WUNLOCK();
3182                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3183                                 return (EINVAL);
3184                         }
3185                 }
3186 #endif
3187                 /* we're not bound all */
3188                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3189                 /* allow bindx() to send ASCONF's for binding changes */
3190                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3191                 /* clear automatic addr changes from kernel flag */
3192                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3193
3194                 /* add this address to the endpoint list */
3195                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3196                 if (error != 0) {
3197                         SCTP_INP_WUNLOCK(inp);
3198                         SCTP_INP_INFO_WUNLOCK();
3199                         return (error);
3200                 }
3201                 inp->laddr_count++;
3202         }
3203         /* find the bucket */
3204         if (port_reuse_active) {
3205                 /* Put it into tcp 1-2-1 hash */
3206                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3207                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3208         } else {
3209                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3210         }
3211         /* put it in the bucket */
3212         LIST_INSERT_HEAD(head, inp, sctp_hash);
3213         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3214             (void *)head, ntohs(lport), port_reuse_active);
3215         /* set in the port */
3216         inp->sctp_lport = lport;
3217
3218         /* turn off just the unbound flag */
3219         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3220         SCTP_INP_WUNLOCK(inp);
3221         SCTP_INP_INFO_WUNLOCK();
3222         return (0);
3223 }
3224
3225
3226 static void
3227 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3228 {
3229         struct sctp_iterator *it, *nit;
3230
3231         /*
3232          * We enter with the only the ITERATOR_LOCK in place and a write
3233          * lock on the inp_info stuff.
3234          */
3235         it = sctp_it_ctl.cur_it;
3236         if (it && (it->vn != curvnet)) {
3237                 /* Its not looking at our VNET */
3238                 return;
3239         }
3240         if (it && (it->inp == inp)) {
3241                 /*
3242                  * This is tricky and we hold the iterator lock, but when it
3243                  * returns and gets the lock (when we release it) the
3244                  * iterator will try to operate on inp. We need to stop that
3245                  * from happening. But of course the iterator has a
3246                  * reference on the stcb and inp. We can mark it and it will
3247                  * stop.
3248                  *
3249                  * If its a single iterator situation, we set the end
3250                  * iterator flag. Otherwise we set the iterator to go to the
3251                  * next inp.
3252                  *
3253                  */
3254                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3255                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3256                 } else {
3257                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3258                 }
3259         }
3260         /*
3261          * Now go through and remove any single reference to our inp that
3262          * may be still pending on the list
3263          */
3264         SCTP_IPI_ITERATOR_WQ_LOCK();
3265         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3266                 if (it->vn != curvnet) {
3267                         continue;
3268                 }
3269                 if (it->inp == inp) {
3270                         /* This one points to me is it inp specific? */
3271                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3272                                 /* Remove and free this one */
3273                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3274                                     it, sctp_nxt_itr);
3275                                 if (it->function_atend != NULL) {
3276                                         (*it->function_atend) (it->pointer, it->val);
3277                                 }
3278                                 SCTP_FREE(it, SCTP_M_ITER);
3279                         } else {
3280                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3281                                 if (it->inp) {
3282                                         SCTP_INP_INCR_REF(it->inp);
3283                                 }
3284                         }
3285                         /*
3286                          * When its put in the refcnt is incremented so decr
3287                          * it
3288                          */
3289                         SCTP_INP_DECR_REF(inp);
3290                 }
3291         }
3292         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3293 }
3294
3295 /* release sctp_inpcb unbind the port */
3296 void
3297 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3298 {
3299         /*
3300          * Here we free a endpoint. We must find it (if it is in the Hash
3301          * table) and remove it from there. Then we must also find it in the
3302          * overall list and remove it from there. After all removals are
3303          * complete then any timer has to be stopped. Then start the actual
3304          * freeing. a) Any local lists. b) Any associations. c) The hash of
3305          * all associations. d) finally the ep itself.
3306          */
3307         struct sctp_tcb *asoc, *nasoc;
3308         struct sctp_laddr *laddr, *nladdr;
3309         struct inpcb *ip_pcb;
3310         struct socket *so;
3311         int being_refed = 0;
3312         struct sctp_queued_to_read *sq, *nsq;
3313         int cnt;
3314         sctp_sharedkey_t *shared_key, *nshared_key;
3315
3316
3317 #ifdef SCTP_LOG_CLOSING
3318         sctp_log_closing(inp, NULL, 0);
3319 #endif
3320         SCTP_ITERATOR_LOCK();
3321         /* mark any iterators on the list or being processed */
3322         sctp_iterator_inp_being_freed(inp);
3323         SCTP_ITERATOR_UNLOCK();
3324         so = inp->sctp_socket;
3325         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3326                 /* been here before.. eeks.. get out of here */
3327                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3328 #ifdef SCTP_LOG_CLOSING
3329                 sctp_log_closing(inp, NULL, 1);
3330 #endif
3331                 return;
3332         }
3333         SCTP_ASOC_CREATE_LOCK(inp);
3334         SCTP_INP_INFO_WLOCK();
3335
3336         SCTP_INP_WLOCK(inp);
3337         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3338                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3339                 /* socket is gone, so no more wakeups allowed */
3340                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3341                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3342                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3343
3344         }
3345         /* First time through we have the socket lock, after that no more. */
3346         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3347             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3348
3349         if (inp->control) {
3350                 sctp_m_freem(inp->control);
3351                 inp->control = NULL;
3352         }
3353         if (inp->pkt) {
3354                 sctp_m_freem(inp->pkt);
3355                 inp->pkt = NULL;
3356         }
3357         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3358                                          * here but I will be nice :> (i.e.
3359                                          * ip_pcb = ep;) */
3360         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3361                 int cnt_in_sd;
3362
3363                 cnt_in_sd = 0;
3364                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3365                         SCTP_TCB_LOCK(asoc);
3366                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3367                                 /* Skip guys being freed */
3368                                 cnt_in_sd++;
3369                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3370                                         /*
3371                                          * Special case - we did not start a
3372                                          * kill timer on the asoc due to it
3373                                          * was not closed. So go ahead and
3374                                          * start it now.
3375                                          */
3376                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3377                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3378                                 }
3379                                 SCTP_TCB_UNLOCK(asoc);
3380                                 continue;
3381                         }
3382                         if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
3383                             (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3384                             (asoc->asoc.total_output_queue_size == 0)) {
3385                                 /*
3386                                  * If we have data in queue, we don't want
3387                                  * to just free since the app may have done,
3388                                  * send()/close or connect/send/close. And
3389                                  * it wants the data to get across first.
3390                                  */
3391                                 /* Just abandon things in the front states */
3392                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3393                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3394                                         cnt_in_sd++;
3395                                 }
3396                                 continue;
3397                         }
3398                         /* Disconnect the socket please */
3399                         asoc->sctp_socket = NULL;
3400                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET);
3401                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3402                             (asoc->asoc.control_pdapi) ||
3403                             (asoc->asoc.size_on_all_streams > 0) ||
3404                             (so && (so->so_rcv.sb_cc > 0))) {
3405                                 /* Left with Data unread */
3406                                 struct mbuf *op_err;
3407
3408                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3409                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3410                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3411                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3412                                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3413                                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3414                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3415                                 }
3416                                 if (sctp_free_assoc(inp, asoc,
3417                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3418                                         cnt_in_sd++;
3419                                 }
3420                                 continue;
3421                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3422                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3423                             (asoc->asoc.stream_queue_cnt == 0)) {
3424                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3425                                         goto abort_anyway;
3426                                 }
3427                                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3428                                     (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3429                                         struct sctp_nets *netp;
3430
3431                                         /*
3432                                          * there is nothing queued to send,
3433                                          * so I send shutdown
3434                                          */
3435                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3436                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3437                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3438                                         }
3439                                         SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
3440                                         SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3441                                         sctp_stop_timers_for_shutdown(asoc);
3442                                         if (asoc->asoc.alternate) {
3443                                                 netp = asoc->asoc.alternate;
3444                                         } else {
3445                                                 netp = asoc->asoc.primary_destination;
3446                                         }
3447                                         sctp_send_shutdown(asoc, netp);
3448                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3449                                             netp);
3450                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3451                                             asoc->asoc.primary_destination);
3452                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3453                                 }
3454                         } else {
3455                                 /* mark into shutdown pending */
3456                                 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
3457                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3458                                     asoc->asoc.primary_destination);
3459                                 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) {
3460                                         SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT);
3461                                 }
3462                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3463                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3464                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3465                                         struct mbuf *op_err;
3466
3467                         abort_anyway:
3468                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3469                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3470                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3471                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3472                                         if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3473                                             (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3474                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3475                                         }
3476                                         if (sctp_free_assoc(inp, asoc,
3477                                             SCTP_PCBFREE_NOFORCE,
3478                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3479                                                 cnt_in_sd++;
3480                                         }
3481                                         continue;
3482                                 } else {
3483                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3484                                 }
3485                         }
3486                         cnt_in_sd++;
3487                         SCTP_TCB_UNLOCK(asoc);
3488                 }
3489                 /* now is there some left in our SHUTDOWN state? */
3490                 if (cnt_in_sd) {
3491 #ifdef SCTP_LOG_CLOSING
3492                         sctp_log_closing(inp, NULL, 2);
3493 #endif
3494                         inp->sctp_socket = NULL;
3495                         SCTP_INP_WUNLOCK(inp);
3496                         SCTP_ASOC_CREATE_UNLOCK(inp);
3497                         SCTP_INP_INFO_WUNLOCK();
3498                         return;
3499                 }
3500         }
3501         inp->sctp_socket = NULL;
3502         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3503             SCTP_PCB_FLAGS_UNBOUND) {
3504                 /*
3505                  * ok, this guy has been bound. It's port is somewhere in
3506                  * the SCTP_BASE_INFO(hash table). Remove it!
3507                  */
3508                 LIST_REMOVE(inp, sctp_hash);
3509                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3510         }
3511
3512         /*
3513          * If there is a timer running to kill us, forget it, since it may
3514          * have a contest on the INP lock.. which would cause us to die ...
3515          */
3516         cnt = 0;
3517         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3518                 SCTP_TCB_LOCK(asoc);
3519                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3520                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3521                                 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE);
3522                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3523                         }
3524                         cnt++;
3525                         SCTP_TCB_UNLOCK(asoc);
3526                         continue;
3527                 }
3528                 /* Free associations that are NOT killing us */
3529                 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
3530                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3531                         struct mbuf *op_err;
3532
3533                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3534                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3535                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3536                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3537                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3538                         cnt++;
3539                         SCTP_TCB_UNLOCK(asoc);
3540                         continue;
3541                 }
3542                 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
3543                     (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3544                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3545                 }
3546                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3547                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3548                         cnt++;
3549                 }
3550         }
3551         if (cnt) {
3552                 /* Ok we have someone out there that will kill us */
3553                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3554 #ifdef SCTP_LOG_CLOSING
3555                 sctp_log_closing(inp, NULL, 3);
3556 #endif
3557                 SCTP_INP_WUNLOCK(inp);
3558                 SCTP_ASOC_CREATE_UNLOCK(inp);
3559                 SCTP_INP_INFO_WUNLOCK();
3560                 return;
3561         }
3562         if (SCTP_INP_LOCK_CONTENDED(inp))
3563                 being_refed++;
3564         if (SCTP_INP_READ_CONTENDED(inp))
3565                 being_refed++;
3566         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3567                 being_refed++;
3568
3569         if ((inp->refcount) ||
3570             (being_refed) ||
3571             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3572                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3573 #ifdef SCTP_LOG_CLOSING
3574                 sctp_log_closing(inp, NULL, 4);
3575 #endif
3576                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3577                 SCTP_INP_WUNLOCK(inp);
3578                 SCTP_ASOC_CREATE_UNLOCK(inp);
3579                 SCTP_INP_INFO_WUNLOCK();
3580                 return;
3581         }
3582         inp->sctp_ep.signature_change.type = 0;
3583         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3584         /*
3585          * Remove it from the list .. last thing we need a lock for.
3586          */
3587         LIST_REMOVE(inp, sctp_list);
3588         SCTP_INP_WUNLOCK(inp);
3589         SCTP_ASOC_CREATE_UNLOCK(inp);
3590         SCTP_INP_INFO_WUNLOCK();
3591         /*
3592          * Now we release all locks. Since this INP cannot be found anymore
3593          * except possibly by the kill timer that might be running. We call
3594          * the drain function here. It should hit the case were it sees the
3595          * ACTIVE flag cleared and exit out freeing us to proceed and
3596          * destroy everything.
3597          */
3598         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3599                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3600         } else {
3601                 /* Probably un-needed */
3602                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3603         }
3604
3605 #ifdef SCTP_LOG_CLOSING
3606         sctp_log_closing(inp, NULL, 5);
3607 #endif
3608
3609
3610         if ((inp->sctp_asocidhash) != NULL) {
3611                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3612                 inp->sctp_asocidhash = NULL;
3613         }
3614         /* sa_ignore FREED_MEMORY */
3615         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3616                 /* Its only abandoned if it had data left */
3617                 if (sq->length)
3618                         SCTP_STAT_INCR(sctps_left_abandon);
3619
3620                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3621                 sctp_free_remote_addr(sq->whoFrom);
3622                 if (so)
3623                         so->so_rcv.sb_cc -= sq->length;
3624                 if (sq->data) {
3625                         sctp_m_freem(sq->data);
3626                         sq->data = NULL;
3627                 }
3628                 /*
3629                  * no need to free the net count, since at this point all
3630                  * assoc's are gone.
3631                  */
3632                 sctp_free_a_readq(NULL, sq);
3633         }
3634         /* Now the sctp_pcb things */
3635         /*
3636          * free each asoc if it is not already closed/free. we can't use the
3637          * macro here since le_next will get freed as part of the
3638          * sctp_free_assoc() call.
3639          */
3640         if (ip_pcb->inp_options) {
3641                 (void)sctp_m_free(ip_pcb->inp_options);
3642                 ip_pcb->inp_options = 0;
3643         }
3644
3645
3646 #ifdef INET6
3647         if (ip_pcb->inp_vflag & INP_IPV6) {
3648                 struct in6pcb *in6p;
3649
3650                 in6p = (struct in6pcb *)inp;
3651                 ip6_freepcbopts(in6p->in6p_outputopts);
3652         }
3653 #endif                          /* INET6 */
3654         ip_pcb->inp_vflag = 0;
3655         /* free up authentication fields */
3656         if (inp->sctp_ep.local_auth_chunks != NULL)
3657                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3658         if (inp->sctp_ep.local_hmacs != NULL)
3659                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3660
3661         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3662                 LIST_REMOVE(shared_key, next);
3663                 sctp_free_sharedkey(shared_key);
3664                 /* sa_ignore FREED_MEMORY */
3665         }
3666
3667         /*
3668          * if we have an address list the following will free the list of
3669          * ifaddr's that are set into this ep. Again macro limitations here,
3670          * since the LIST_FOREACH could be a bad idea.
3671          */
3672         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3673                 sctp_remove_laddr(laddr);
3674         }
3675
3676 #ifdef SCTP_TRACK_FREED_ASOCS
3677         /* TEMP CODE */
3678         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3679                 LIST_REMOVE(asoc, sctp_tcblist);
3680                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3681                 SCTP_DECR_ASOC_COUNT();
3682         }
3683         /* *** END TEMP CODE *** */
3684 #endif
3685         /* Now lets see about freeing the EP hash table. */
3686         if (inp->sctp_tcbhash != NULL) {
3687                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3688                 inp->sctp_tcbhash = NULL;
3689         }
3690         /* Now we must put the ep memory back into the zone pool */
3691         crfree(inp->ip_inp.inp.inp_cred);
3692         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3693         SCTP_INP_LOCK_DESTROY(inp);
3694         SCTP_INP_READ_DESTROY(inp);
3695         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3696         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3697         SCTP_DECR_EP_COUNT();
3698 }
3699
3700
3701 struct sctp_nets *
3702 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3703 {
3704         struct sctp_nets *net;
3705
3706         /* locate the address */
3707         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3708                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3709                         return (net);
3710         }
3711         return (NULL);
3712 }
3713
3714
3715 int
3716 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3717 {
3718         struct sctp_ifa *sctp_ifa;
3719
3720         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3721         if (sctp_ifa) {
3722                 return (1);
3723         } else {
3724                 return (0);
3725         }
3726 }
3727
3728 /*
3729  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3730  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3731  * stats of stuff.
3732  */
3733 int
3734 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3735     struct sctp_nets **netp, uint16_t port, int set_scope, int from)
3736 {
3737         /*
3738          * The following is redundant to the same lines in the
3739          * sctp_aloc_assoc() but is needed since others call the add address
3740          * function
3741          */
3742         struct sctp_nets *net, *netfirst;
3743         int addr_inscope;
3744
3745         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3746             from);
3747         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3748
3749         netfirst = sctp_findnet(stcb, newaddr);
3750         if (netfirst) {
3751                 /*
3752                  * Lie and return ok, we don't want to make the association
3753                  * go away for this behavior. It will happen in the TCP
3754                  * model in a connected socket. It does not reach the hash
3755                  * table until after the association is built so it can't be
3756                  * found. Mark as reachable, since the initial creation will
3757                  * have been cleared and the NOT_IN_ASSOC flag will have
3758                  * been added... and we don't want to end up removing it
3759                  * back out.
3760                  */
3761                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3762                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3763                             SCTP_ADDR_UNCONFIRMED);
3764                 } else {
3765                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3766                 }
3767
3768                 return (0);
3769         }
3770         addr_inscope = 1;
3771         switch (newaddr->sa_family) {
3772 #ifdef INET
3773         case AF_INET:
3774                 {
3775                         struct sockaddr_in *sin;
3776
3777                         sin = (struct sockaddr_in *)newaddr;
3778                         if (sin->sin_addr.s_addr == 0) {
3779                                 /* Invalid address */
3780                                 return (-1);
3781                         }
3782                         /* zero out the zero area */
3783                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3784
3785                         /* assure len is set */
3786                         sin->sin_len = sizeof(struct sockaddr_in);
3787                         if (set_scope) {
3788                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3789                                         stcb->asoc.scope.ipv4_local_scope = 1;
3790                                 }
3791                         } else {
3792                                 /* Validate the address is in scope */
3793                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3794                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3795                                         addr_inscope = 0;
3796                                 }
3797                         }
3798                         break;
3799                 }
3800 #endif
3801 #ifdef INET6
3802         case AF_INET6:
3803                 {
3804                         struct sockaddr_in6 *sin6;
3805
3806                         sin6 = (struct sockaddr_in6 *)newaddr;
3807                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3808                                 /* Invalid address */
3809                                 return (-1);
3810                         }
3811                         /* assure len is set */
3812                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3813                         if (set_scope) {
3814                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3815                                         stcb->asoc.scope.loopback_scope = 1;
3816                                         stcb->asoc.scope.local_scope = 0;
3817                                         stcb->asoc.scope.ipv4_local_scope = 1;
3818                                         stcb->asoc.scope.site_scope = 1;
3819                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3820                                         /*
3821                                          * If the new destination is a
3822                                          * LINK_LOCAL we must have common
3823                                          * site scope. Don't set the local
3824                                          * scope since we may not share all
3825                                          * links, only loopback can do this.
3826                                          * Links on the local network would
3827                                          * also be on our private network
3828                                          * for v4 too.
3829                                          */
3830                                         stcb->asoc.scope.ipv4_local_scope = 1;
3831                                         stcb->asoc.scope.site_scope = 1;
3832                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3833                                         /*
3834                                          * If the new destination is
3835                                          * SITE_LOCAL then we must have site
3836                                          * scope in common.
3837                                          */
3838                                         stcb->asoc.scope.site_scope = 1;
3839                                 }
3840                         } else {
3841                                 /* Validate the address is in scope */
3842                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3843                                     (stcb->asoc.scope.loopback_scope == 0)) {
3844                                         addr_inscope = 0;
3845                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3846                                     (stcb->asoc.scope.local_scope == 0)) {
3847                                         addr_inscope = 0;
3848                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3849                                     (stcb->asoc.scope.site_scope == 0)) {
3850                                         addr_inscope = 0;
3851                                 }
3852                         }
3853                         break;
3854                 }
3855 #endif
3856         default:
3857                 /* not supported family type */
3858                 return (-1);
3859         }
3860         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3861         if (net == NULL) {
3862                 return (-1);
3863         }
3864         SCTP_INCR_RADDR_COUNT();
3865         memset(net, 0, sizeof(struct sctp_nets));
3866         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3867         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3868         switch (newaddr->sa_family) {
3869 #ifdef INET
3870         case AF_INET:
3871                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3872                 break;
3873 #endif
3874 #ifdef INET6
3875         case AF_INET6:
3876                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3877                 break;
3878 #endif
3879         default:
3880                 break;
3881         }
3882         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3883         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3884                 stcb->asoc.scope.loopback_scope = 1;
3885                 stcb->asoc.scope.ipv4_local_scope = 1;
3886                 stcb->asoc.scope.local_scope = 0;
3887                 stcb->asoc.scope.site_scope = 1;
3888                 addr_inscope = 1;
3889         }
3890         net->failure_threshold = stcb->asoc.def_net_failure;
3891         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3892         if (addr_inscope == 0) {
3893                 net->dest_state = (SCTP_ADDR_REACHABLE |
3894                     SCTP_ADDR_OUT_OF_SCOPE);
3895         } else {
3896                 if (from == SCTP_ADDR_IS_CONFIRMED)
3897                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3898                         net->dest_state = SCTP_ADDR_REACHABLE;
3899                 else
3900                         net->dest_state = SCTP_ADDR_REACHABLE |
3901                             SCTP_ADDR_UNCONFIRMED;
3902         }
3903         /*
3904          * We set this to 0, the timer code knows that this means its an
3905          * initial value
3906          */
3907         net->rto_needed = 1;
3908         net->RTO = 0;
3909         net->RTO_measured = 0;
3910         stcb->asoc.numnets++;
3911         net->ref_count = 1;
3912         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3913         net->port = port;
3914         net->dscp = stcb->asoc.default_dscp;
3915 #ifdef INET6
3916         net->flowlabel = stcb->asoc.default_flowlabel;
3917 #endif
3918         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3919                 net->dest_state |= SCTP_ADDR_NOHB;
3920         } else {
3921                 net->dest_state &= ~SCTP_ADDR_NOHB;
3922         }
3923         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3924                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3925         } else {
3926                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3927         }
3928         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3929         /* Init the timer structure */
3930         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3931         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3932         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3933
3934         /* Now generate a route for this guy */
3935 #ifdef INET6
3936         /* KAME hack: embed scopeid */
3937         if (newaddr->sa_family == AF_INET6) {
3938                 struct sockaddr_in6 *sin6;
3939
3940                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3941                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3942                 sin6->sin6_scope_id = 0;
3943         }
3944 #endif
3945         SCTP_RTALLOC((sctp_route_t *)&net->ro,
3946             stcb->asoc.vrf_id,
3947             stcb->sctp_ep->fibnum);
3948
3949         net->src_addr_selected = 0;
3950         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3951                 /* Get source address */
3952                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3953                     stcb,
3954                     (sctp_route_t *)&net->ro,
3955                     net,
3956                     0,
3957                     stcb->asoc.vrf_id);
3958                 if (stcb->asoc.default_mtu > 0) {
3959                         net->mtu = stcb->asoc.default_mtu;
3960                         switch (net->ro._l_addr.sa.sa_family) {
3961 #ifdef INET
3962                         case AF_INET:
3963                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
3964                                 break;
3965 #endif
3966 #ifdef INET6
3967                         case AF_INET6:
3968                                 net->mtu += SCTP_MIN_OVERHEAD;
3969                                 break;
3970 #endif
3971                         default:
3972                                 break;
3973                         }
3974 #if defined(INET) || defined(INET6)
3975                         if (net->port) {
3976                                 net->mtu += (uint32_t)sizeof(struct udphdr);
3977                         }
3978 #endif
3979                 } else if (net->ro._s_addr != NULL) {
3980                         uint32_t imtu, rmtu, hcmtu;
3981
3982                         net->src_addr_selected = 1;
3983                         /* Now get the interface MTU */
3984                         if (net->ro._s_addr->ifn_p != NULL) {
3985                                 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3986                         } else {
3987                                 imtu = 0;
3988                         }
3989                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3990                         hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum);
3991                         net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu);
3992                         if (rmtu == 0) {
3993                                 /*
3994                                  * Start things off to match mtu of
3995                                  * interface please.
3996                                  */
3997                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3998                                     net->ro.ro_rt, net->mtu);
3999                         }
4000                 }
4001         }
4002         if (net->mtu == 0) {
4003                 if (stcb->asoc.default_mtu > 0) {
4004                         net->mtu = stcb->asoc.default_mtu;
4005                         switch (net->ro._l_addr.sa.sa_family) {
4006 #ifdef INET
4007                         case AF_INET:
4008                                 net->mtu += SCTP_MIN_V4_OVERHEAD;
4009                                 break;
4010 #endif
4011 #ifdef INET6
4012                         case AF_INET6:
4013                                 net->mtu += SCTP_MIN_OVERHEAD;
4014                                 break;
4015 #endif
4016                         default:
4017                                 break;
4018                         }
4019 #if defined(INET) || defined(INET6)
4020                         if (net->port) {
4021                                 net->mtu += (uint32_t)sizeof(struct udphdr);
4022                         }
4023 #endif
4024                 } else {
4025                         switch (newaddr->sa_family) {
4026 #ifdef INET
4027                         case AF_INET:
4028                                 net->mtu = SCTP_DEFAULT_MTU;
4029                                 break;
4030 #endif
4031 #ifdef INET6
4032                         case AF_INET6:
4033                                 net->mtu = 1280;
4034                                 break;
4035 #endif
4036                         default:
4037                                 break;
4038                         }
4039                 }
4040         }
4041 #if defined(INET) || defined(INET6)
4042         if (net->port) {
4043                 net->mtu -= (uint32_t)sizeof(struct udphdr);
4044         }
4045 #endif
4046         if (from == SCTP_ALLOC_ASOC) {
4047                 stcb->asoc.smallest_mtu = net->mtu;
4048         }
4049         if (stcb->asoc.smallest_mtu > net->mtu) {
4050                 sctp_pathmtu_adjustment(stcb, net->mtu);
4051         }
4052 #ifdef INET6
4053         if (newaddr->sa_family == AF_INET6) {
4054                 struct sockaddr_in6 *sin6;
4055
4056                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4057                 (void)sa6_recoverscope(sin6);
4058         }
4059 #endif
4060
4061         /* JRS - Use the congestion control given in the CC module */
4062         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4063                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4064
4065         /*
4066          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4067          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4068          */
4069         net->find_pseudo_cumack = 1;
4070         net->find_rtx_pseudo_cumack = 1;
4071         /* Choose an initial flowid. */
4072         net->flowid = stcb->asoc.my_vtag ^
4073             ntohs(stcb->rport) ^
4074             ntohs(stcb->sctp_ep->sctp_lport);
4075         net->flowtype = M_HASHTYPE_OPAQUE_HASH;
4076         if (netp) {
4077                 *netp = net;
4078         }
4079         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4080         if (net->ro.ro_rt == NULL) {
4081                 /* Since we have no route put it at the back */
4082                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4083         } else if (netfirst == NULL) {
4084                 /* We are the first one in the pool. */
4085                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4086         } else if (netfirst->ro.ro_rt == NULL) {
4087                 /*
4088                  * First one has NO route. Place this one ahead of the first
4089                  * one.
4090                  */
4091                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4092         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4093                 /*
4094                  * This one has a different interface than the one at the
4095                  * top of the list. Place it ahead.
4096                  */
4097                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4098         } else {
4099                 /*
4100                  * Ok we have the same interface as the first one. Move
4101                  * forward until we find either a) one with a NULL route...
4102                  * insert ahead of that b) one with a different ifp.. insert
4103                  * after that. c) end of the list.. insert at the tail.
4104                  */
4105                 struct sctp_nets *netlook;
4106
4107                 do {
4108                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4109                         if (netlook == NULL) {
4110                                 /* End of the list */
4111                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4112                                 break;
4113                         } else if (netlook->ro.ro_rt == NULL) {
4114                                 /* next one has NO route */
4115                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4116                                 break;
4117                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4118                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4119                                     net, sctp_next);
4120                                 break;
4121                         }
4122                         /* Shift forward */
4123                         netfirst = netlook;
4124                 } while (netlook != NULL);
4125         }
4126
4127         /* got to have a primary set */
4128         if (stcb->asoc.primary_destination == 0) {
4129                 stcb->asoc.primary_destination = net;
4130         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4131                     (net->ro.ro_rt) &&
4132             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4133                 /* No route to current primary adopt new primary */
4134                 stcb->asoc.primary_destination = net;
4135         }
4136         /* Validate primary is first */
4137         net = TAILQ_FIRST(&stcb->asoc.nets);
4138         if ((net != stcb->asoc.primary_destination) &&
4139             (stcb->asoc.primary_destination)) {
4140                 /*
4141                  * first one on the list is NOT the primary sctp_cmpaddr()
4142                  * is much more efficient if the primary is the first on the
4143                  * list, make it so.
4144                  */
4145                 TAILQ_REMOVE(&stcb->asoc.nets,
4146                     stcb->asoc.primary_destination, sctp_next);
4147                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4148                     stcb->asoc.primary_destination, sctp_next);
4149         }
4150         return (0);
4151 }
4152
4153
4154 static uint32_t
4155 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4156 {
4157         uint32_t id;
4158         struct sctpasochead *head;
4159         struct sctp_tcb *lstcb;
4160
4161         SCTP_INP_WLOCK(inp);
4162 try_again:
4163         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4164                 /* TSNH */
4165                 SCTP_INP_WUNLOCK(inp);
4166                 return (0);
4167         }
4168         /*
4169          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4170          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4171          */
4172         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4173                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4174         }
4175         id = inp->sctp_associd_counter;
4176         inp->sctp_associd_counter++;
4177         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0);
4178         if (lstcb) {
4179                 goto try_again;
4180         }
4181         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4182         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4183         stcb->asoc.in_asocid_hash = 1;
4184         SCTP_INP_WUNLOCK(inp);
4185         return id;
4186 }
4187
4188 /*
4189  * allocate an association and add it to the endpoint. The caller must be
4190  * careful to add all additional addresses once they are know right away or
4191  * else the assoc will be may experience a blackout scenario.
4192  */
4193 struct sctp_tcb *
4194 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4195     int *error, uint32_t override_tag, uint32_t vrf_id,
4196     uint16_t o_streams, uint16_t port,
4197     struct thread *p
4198 )
4199 {
4200         /* note the p argument is only valid in unbound sockets */
4201
4202         struct sctp_tcb *stcb;
4203         struct sctp_association *asoc;
4204         struct sctpasochead *head;
4205         uint16_t rport;
4206         int err;
4207
4208         /*
4209          * Assumption made here: Caller has done a
4210          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4211          * address does not exist already.
4212          */
4213         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4214                 /* Hit max assoc, sorry no more */
4215                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4216                 *error = ENOBUFS;
4217                 return (NULL);
4218         }
4219         if (firstaddr == NULL) {
4220                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4221                 *error = EINVAL;
4222                 return (NULL);
4223         }
4224         SCTP_INP_RLOCK(inp);
4225         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4226             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4227             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4228                 /*
4229                  * If its in the TCP pool, its NOT allowed to create an
4230                  * association. The parent listener needs to call
4231                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4232                  * off, or connected one does this.. its an error.
4233                  */
4234                 SCTP_INP_RUNLOCK(inp);
4235                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4236                 *error = EINVAL;
4237                 return (NULL);
4238         }
4239         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4240             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4241                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4242                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4243                         SCTP_INP_RUNLOCK(inp);
4244                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4245                         *error = EINVAL;
4246                         return (NULL);
4247                 }
4248         }
4249         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4250 #ifdef SCTP_DEBUG
4251         if (firstaddr) {
4252                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4253                 switch (firstaddr->sa_family) {
4254 #ifdef INET
4255                 case AF_INET:
4256                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4257                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4258                         break;
4259 #endif
4260 #ifdef INET6
4261                 case AF_INET6:
4262                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4263                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4264                         break;
4265 #endif
4266                 default:
4267                         break;
4268                 }
4269         } else {
4270                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4271         }
4272 #endif                          /* SCTP_DEBUG */
4273         switch (firstaddr->sa_family) {
4274 #ifdef INET
4275         case AF_INET:
4276                 {
4277                         struct sockaddr_in *sin;
4278
4279                         sin = (struct sockaddr_in *)firstaddr;
4280                         if ((ntohs(sin->sin_port) == 0) ||
4281                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4282                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4283                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4284                                 /* Invalid address */
4285                                 SCTP_INP_RUNLOCK(inp);
4286                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4287                                 *error = EINVAL;
4288                                 return (NULL);
4289                         }
4290                         rport = sin->sin_port;
4291                         break;
4292                 }
4293 #endif
4294 #ifdef INET6
4295         case AF_INET6:
4296                 {
4297                         struct sockaddr_in6 *sin6;
4298
4299                         sin6 = (struct sockaddr_in6 *)firstaddr;
4300                         if ((ntohs(sin6->sin6_port) == 0) ||
4301                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4302                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4303                                 /* Invalid address */
4304                                 SCTP_INP_RUNLOCK(inp);
4305                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4306                                 *error = EINVAL;
4307                                 return (NULL);
4308                         }
4309                         rport = sin6->sin6_port;
4310                         break;
4311                 }
4312 #endif
4313         default:
4314                 /* not supported family type */
4315                 SCTP_INP_RUNLOCK(inp);
4316                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4317                 *error = EINVAL;
4318                 return (NULL);
4319         }
4320         SCTP_INP_RUNLOCK(inp);
4321         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4322                 /*
4323                  * If you have not performed a bind, then we need to do the
4324                  * ephemeral bind for you.
4325                  */
4326                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4327                     (struct sockaddr *)NULL,
4328                     (struct sctp_ifa *)NULL,
4329                     p
4330                     ))) {
4331                         /* bind error, probably perm */
4332                         *error = err;
4333                         return (NULL);
4334                 }
4335         }
4336         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4337         if (stcb == NULL) {
4338                 /* out of memory? */
4339                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4340                 *error = ENOMEM;
4341                 return (NULL);
4342         }
4343         SCTP_INCR_ASOC_COUNT();
4344
4345         memset(stcb, 0, sizeof(*stcb));
4346         asoc = &stcb->asoc;
4347
4348         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4349         SCTP_TCB_LOCK_INIT(stcb);
4350         SCTP_TCB_SEND_LOCK_INIT(stcb);
4351         stcb->rport = rport;
4352         /* setup back pointer's */
4353         stcb->sctp_ep = inp;
4354         stcb->sctp_socket = inp->sctp_socket;
4355         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4356                 /* failed */
4357                 SCTP_TCB_LOCK_DESTROY(stcb);
4358                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4359                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4360                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4361                 SCTP_DECR_ASOC_COUNT();
4362                 *error = err;
4363                 return (NULL);
4364         }
4365         /* and the port */
4366         SCTP_INP_INFO_WLOCK();
4367         SCTP_INP_WLOCK(inp);
4368         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4369                 /* inpcb freed while alloc going on */
4370                 SCTP_TCB_LOCK_DESTROY(stcb);
4371                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4372                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4373                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4374                 SCTP_INP_WUNLOCK(inp);
4375                 SCTP_INP_INFO_WUNLOCK();
4376                 SCTP_DECR_ASOC_COUNT();
4377                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4378                 *error = EINVAL;
4379                 return (NULL);
4380         }
4381         SCTP_TCB_LOCK(stcb);
4382
4383         /* now that my_vtag is set, add it to the hash */
4384         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4385         /* put it in the bucket in the vtag hash of assoc's for the system */
4386         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4387         SCTP_INP_INFO_WUNLOCK();
4388
4389         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4390                 /* failure.. memory error? */
4391                 if (asoc->strmout) {
4392                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4393                         asoc->strmout = NULL;
4394                 }
4395                 if (asoc->mapping_array) {
4396                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4397                         asoc->mapping_array = NULL;
4398                 }
4399                 if (asoc->nr_mapping_array) {
4400                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4401                         asoc->nr_mapping_array = NULL;
4402                 }
4403                 SCTP_DECR_ASOC_COUNT();
4404                 SCTP_TCB_UNLOCK(stcb);
4405                 SCTP_TCB_LOCK_DESTROY(stcb);
4406                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4407                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4408                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4409                 SCTP_INP_WUNLOCK(inp);
4410                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4411                 *error = ENOBUFS;
4412                 return (NULL);
4413         }
4414         /* Init all the timers */
4415         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4416         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4417         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4418         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4419         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4420         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4421         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4422
4423         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4424         /* now file the port under the hash as well */
4425         if (inp->sctp_tcbhash != NULL) {
4426                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4427                     inp->sctp_hashmark)];
4428                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4429         }
4430         SCTP_INP_WUNLOCK(inp);
4431         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4432         return (stcb);
4433 }
4434
4435
4436 void
4437 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4438 {
4439         struct sctp_association *asoc;
4440
4441         asoc = &stcb->asoc;
4442         asoc->numnets--;
4443         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4444         if (net == asoc->primary_destination) {
4445                 /* Reset primary */
4446                 struct sctp_nets *lnet;
4447
4448                 lnet = TAILQ_FIRST(&asoc->nets);
4449                 /*
4450                  * Mobility adaptation Ideally, if deleted destination is
4451                  * the primary, it becomes a fast retransmission trigger by
4452                  * the subsequent SET PRIMARY. (by micchie)
4453                  */
4454                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4455                     SCTP_MOBILITY_BASE) ||
4456                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4457                     SCTP_MOBILITY_FASTHANDOFF)) {
4458                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4459                         if (asoc->deleted_primary != NULL) {
4460                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4461                                 goto out;
4462                         }
4463                         asoc->deleted_primary = net;
4464                         atomic_add_int(&net->ref_count, 1);
4465                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4466                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4467                         sctp_mobility_feature_on(stcb->sctp_ep,
4468                             SCTP_MOBILITY_PRIM_DELETED);
4469                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4470                             stcb->sctp_ep, stcb, NULL);
4471                 }
4472 out:
4473                 /* Try to find a confirmed primary */
4474                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4475         }
4476         if (net == asoc->last_data_chunk_from) {
4477                 /* Reset primary */
4478                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4479         }
4480         if (net == asoc->last_control_chunk_from) {
4481                 /* Clear net */
4482                 asoc->last_control_chunk_from = NULL;
4483         }
4484         if (net == stcb->asoc.alternate) {
4485                 sctp_free_remote_addr(stcb->asoc.alternate);
4486                 stcb->asoc.alternate = NULL;
4487         }
4488         sctp_free_remote_addr(net);
4489 }
4490
4491 /*
4492  * remove a remote endpoint address from an association, it will fail if the
4493  * address does not exist.
4494  */
4495 int
4496 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4497 {
4498         /*
4499          * Here we need to remove a remote address. This is quite simple, we
4500          * first find it in the list of address for the association
4501          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4502          * on that item. Note we do not allow it to be removed if there are
4503          * no other addresses.
4504          */
4505         struct sctp_association *asoc;
4506         struct sctp_nets *net, *nnet;
4507
4508         asoc = &stcb->asoc;
4509
4510         /* locate the address */
4511         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4512                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4513                         continue;
4514                 }
4515                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4516                     remaddr)) {
4517                         /* we found the guy */
4518                         if (asoc->numnets < 2) {
4519                                 /* Must have at LEAST two remote addresses */
4520                                 return (-1);
4521                         } else {
4522                                 sctp_remove_net(stcb, net);
4523                                 return (0);
4524                         }
4525                 }
4526         }
4527         /* not found. */
4528         return (-2);
4529 }
4530
4531 void
4532 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4533 {
4534         struct sctpvtaghead *chain;
4535         struct sctp_tagblock *twait_block;
4536         int found = 0;
4537         int i;
4538
4539         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4540         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4541                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4542                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4543                             (twait_block->vtag_block[i].lport == lport) &&
4544                             (twait_block->vtag_block[i].rport == rport)) {
4545                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4546                                 twait_block->vtag_block[i].v_tag = 0;
4547                                 twait_block->vtag_block[i].lport = 0;
4548                                 twait_block->vtag_block[i].rport = 0;
4549                                 found = 1;
4550                                 break;
4551                         }
4552                 }
4553                 if (found)
4554                         break;
4555         }
4556 }
4557
4558 int
4559 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4560 {
4561         struct sctpvtaghead *chain;
4562         struct sctp_tagblock *twait_block;
4563         int found = 0;
4564         int i;
4565
4566         SCTP_INP_INFO_WLOCK();
4567         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4568         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4569                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4570                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4571                             (twait_block->vtag_block[i].lport == lport) &&
4572                             (twait_block->vtag_block[i].rport == rport)) {
4573                                 found = 1;
4574                                 break;
4575                         }
4576                 }
4577                 if (found)
4578                         break;
4579         }
4580         SCTP_INP_INFO_WUNLOCK();
4581         return (found);
4582 }
4583
4584
4585 void
4586 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4587 {
4588         struct sctpvtaghead *chain;
4589         struct sctp_tagblock *twait_block;
4590         struct timeval now;
4591         int set, i;
4592
4593         if (time == 0) {
4594                 /* Its disabled */
4595                 return;
4596         }
4597         (void)SCTP_GETTIME_TIMEVAL(&now);
4598         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4599         set = 0;
4600         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4601                 /* Block(s) present, lets find space, and expire on the fly */
4602                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4603                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4604                             !set) {
4605                                 twait_block->vtag_block[i].tv_sec_at_expire =
4606                                     now.tv_sec + time;
4607                                 twait_block->vtag_block[i].v_tag = tag;
4608                                 twait_block->vtag_block[i].lport = lport;
4609                                 twait_block->vtag_block[i].rport = rport;
4610                                 set = 1;
4611                         } else if ((twait_block->vtag_block[i].v_tag) &&
4612                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4613                                 /* Audit expires this guy */
4614                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4615                                 twait_block->vtag_block[i].v_tag = 0;
4616                                 twait_block->vtag_block[i].lport = 0;
4617                                 twait_block->vtag_block[i].rport = 0;
4618                                 if (set == 0) {
4619                                         /* Reuse it for my new tag */
4620                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4621                                         twait_block->vtag_block[i].v_tag = tag;
4622                                         twait_block->vtag_block[i].lport = lport;
4623                                         twait_block->vtag_block[i].rport = rport;
4624                                         set = 1;
4625                                 }
4626                         }
4627                 }
4628                 if (set) {
4629                         /*
4630                          * We only do up to the block where we can place our
4631                          * tag for audits
4632                          */
4633                         break;
4634                 }
4635         }
4636         /* Need to add a new block to chain */
4637         if (!set) {
4638                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4639                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4640                 if (twait_block == NULL) {
4641 #ifdef INVARIANTS
4642                         panic("Can not alloc tagblock");
4643 #endif
4644                         return;
4645                 }
4646                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4647                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4648                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4649                 twait_block->vtag_block[0].v_tag = tag;
4650                 twait_block->vtag_block[0].lport = lport;
4651                 twait_block->vtag_block[0].rport = rport;
4652         }
4653 }
4654
4655 void
4656 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4657 {
4658         struct sctp_tmit_chunk *chk, *nchk;
4659         struct sctp_queued_to_read *control, *ncontrol;
4660
4661         TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) {
4662                 TAILQ_REMOVE(rh, control, next_instrm);
4663                 control->on_strm_q = 0;
4664                 if (control->on_read_q == 0) {
4665                         sctp_free_remote_addr(control->whoFrom);
4666                         if (control->data) {
4667                                 sctp_m_freem(control->data);
4668                                 control->data = NULL;
4669                         }
4670                 }
4671                 /* Reassembly free? */
4672                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
4673                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
4674                         if (chk->data) {
4675                                 sctp_m_freem(chk->data);
4676                                 chk->data = NULL;
4677                         }
4678                         if (chk->holds_key_ref)
4679                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4680                         sctp_free_remote_addr(chk->whoTo);
4681                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4682                         SCTP_DECR_CHK_COUNT();
4683                         /* sa_ignore FREED_MEMORY */
4684                 }
4685                 /*
4686                  * We don't free the address here since all the net's were
4687                  * freed above.
4688                  */
4689                 if (control->on_read_q == 0) {
4690                         sctp_free_a_readq(stcb, control);
4691                 }
4692         }
4693 }
4694
4695
4696 /*-
4697  * Free the association after un-hashing the remote port. This
4698  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4699  * expect that the input to this function IS a locked TCB.
4700  * It will return 0, if it did NOT destroy the association (instead
4701  * it unlocks it. It will return NON-zero if it either destroyed the
4702  * association OR the association is already destroyed.
4703  */
4704 int
4705 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4706 {
4707         int i;
4708         struct sctp_association *asoc;
4709         struct sctp_nets *net, *nnet;
4710         struct sctp_laddr *laddr, *naddr;
4711         struct sctp_tmit_chunk *chk, *nchk;
4712         struct sctp_asconf_addr *aparam, *naparam;
4713         struct sctp_asconf_ack *aack, *naack;
4714         struct sctp_stream_reset_list *strrst, *nstrrst;
4715         struct sctp_queued_to_read *sq, *nsq;
4716         struct sctp_stream_queue_pending *sp, *nsp;
4717         sctp_sharedkey_t *shared_key, *nshared_key;
4718         struct socket *so;
4719
4720         /* first, lets purge the entry from the hash table. */
4721
4722 #ifdef SCTP_LOG_CLOSING
4723         sctp_log_closing(inp, stcb, 6);
4724 #endif
4725         if (stcb->asoc.state == 0) {
4726 #ifdef SCTP_LOG_CLOSING
4727                 sctp_log_closing(inp, NULL, 7);
4728 #endif
4729                 /* there is no asoc, really TSNH :-0 */
4730                 return (1);
4731         }
4732         if (stcb->asoc.alternate) {
4733                 sctp_free_remote_addr(stcb->asoc.alternate);
4734                 stcb->asoc.alternate = NULL;
4735         }
4736         /* TEMP CODE */
4737         if (stcb->freed_from_where == 0) {
4738                 /* Only record the first place free happened from */
4739                 stcb->freed_from_where = from_location;
4740         }
4741         /* TEMP CODE */
4742
4743         asoc = &stcb->asoc;
4744         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4745             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4746                 /* nothing around */
4747                 so = NULL;
4748         else
4749                 so = inp->sctp_socket;
4750
4751         /*
4752          * We used timer based freeing if a reader or writer is in the way.
4753          * So we first check if we are actually being called from a timer,
4754          * if so we abort early if a reader or writer is still in the way.
4755          */
4756         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4757             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4758                 /*
4759                  * is it the timer driving us? if so are the reader/writers
4760                  * gone?
4761                  */
4762                 if (stcb->asoc.refcnt) {
4763                         /* nope, reader or writer in the way */
4764                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4765                         /* no asoc destroyed */
4766                         SCTP_TCB_UNLOCK(stcb);
4767 #ifdef SCTP_LOG_CLOSING
4768                         sctp_log_closing(inp, stcb, 8);
4769 #endif
4770                         return (0);
4771                 }
4772         }
4773         /* now clean up any other timers */
4774         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4775         asoc->dack_timer.self = NULL;
4776         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4777         /*-
4778          * For stream reset we don't blast this unless
4779          * it is a str-reset timer, it might be the
4780          * free-asoc timer which we DON'T want to
4781          * disturb.
4782          */
4783         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4784                 asoc->strreset_timer.self = NULL;
4785         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4786         asoc->asconf_timer.self = NULL;
4787         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4788         asoc->autoclose_timer.self = NULL;
4789         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4790         asoc->shut_guard_timer.self = NULL;
4791         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4792         asoc->delayed_event_timer.self = NULL;
4793         /* Mobility adaptation */
4794         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4795         asoc->delete_prim_timer.self = NULL;
4796         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4797                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4798                 net->rxt_timer.self = NULL;
4799                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4800                 net->pmtu_timer.self = NULL;
4801                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4802                 net->hb_timer.self = NULL;
4803         }
4804         /* Now the read queue needs to be cleaned up (only once) */
4805         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4806                 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED);
4807                 SCTP_INP_READ_LOCK(inp);
4808                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4809                         if (sq->stcb == stcb) {
4810                                 sq->do_not_ref_stcb = 1;
4811                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4812                                 /*
4813                                  * If there is no end, there never will be
4814                                  * now.
4815                                  */
4816                                 if (sq->end_added == 0) {
4817                                         /* Held for PD-API clear that. */
4818                                         sq->pdapi_aborted = 1;
4819                                         sq->held_length = 0;
4820                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4821                                                 /*
4822                                                  * Need to add a PD-API
4823                                                  * aborted indication.
4824                                                  * Setting the control_pdapi
4825                                                  * assures that it will be
4826                                                  * added right after this
4827                                                  * msg.
4828                                                  */
4829                                                 uint32_t strseq;
4830
4831                                                 stcb->asoc.control_pdapi = sq;
4832                                                 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff);
4833                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4834                                                     stcb,
4835                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4836                                                     (void *)&strseq,
4837                                                     SCTP_SO_LOCKED);
4838                                                 stcb->asoc.control_pdapi = NULL;
4839                                         }
4840                                 }
4841                                 /* Add an end to wake them */
4842                                 sq->end_added = 1;
4843                         }
4844                 }
4845                 SCTP_INP_READ_UNLOCK(inp);
4846                 if (stcb->block_entry) {
4847                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4848                         stcb->block_entry->error = ECONNRESET;
4849                         stcb->block_entry = NULL;
4850                 }
4851         }
4852         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4853                 /*
4854                  * Someone holds a reference OR the socket is unaccepted
4855                  * yet.
4856                  */
4857                 if ((stcb->asoc.refcnt) ||
4858                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4859                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4860                         SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4861                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4862                 }
4863                 SCTP_TCB_UNLOCK(stcb);
4864                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4865                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4866                         /* nothing around */
4867                         so = NULL;
4868                 if (so) {
4869                         /* Wake any reader/writers */
4870                         sctp_sorwakeup(inp, so);
4871                         sctp_sowwakeup(inp, so);
4872                 }
4873
4874 #ifdef SCTP_LOG_CLOSING
4875                 sctp_log_closing(inp, stcb, 9);
4876 #endif
4877                 /* no asoc destroyed */
4878                 return (0);
4879         }
4880 #ifdef SCTP_LOG_CLOSING
4881         sctp_log_closing(inp, stcb, 10);
4882 #endif
4883         /*
4884          * When I reach here, no others want to kill the assoc yet.. and I
4885          * own the lock. Now its possible an abort comes in when I do the
4886          * lock exchange below to grab all the locks to do the final take
4887          * out. to prevent this we increment the count, which will start a
4888          * timer and blow out above thus assuring us that we hold exclusive
4889          * killing of the asoc. Note that after getting back the TCB lock we
4890          * will go ahead and increment the counter back up and stop any
4891          * timer a passing stranger may have started :-S
4892          */
4893         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4894                 atomic_add_int(&stcb->asoc.refcnt, 1);
4895
4896                 SCTP_TCB_UNLOCK(stcb);
4897                 SCTP_INP_INFO_WLOCK();
4898                 SCTP_INP_WLOCK(inp);
4899                 SCTP_TCB_LOCK(stcb);
4900         }
4901         /* Double check the GONE flag */
4902         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4903             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4904                 /* nothing around */
4905                 so = NULL;
4906
4907         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4908             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4909                 /*
4910                  * For TCP type we need special handling when we are
4911                  * connected. We also include the peel'ed off ones to.
4912                  */
4913                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4914                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4915                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4916                         if (so) {
4917                                 SOCKBUF_LOCK(&so->so_rcv);
4918                                 if (so->so_rcv.sb_cc == 0) {
4919                                         so->so_state &= ~(SS_ISCONNECTING |
4920                                             SS_ISDISCONNECTING |
4921                                             SS_ISCONFIRMING |
4922                                             SS_ISCONNECTED);
4923                                 }
4924                                 socantrcvmore_locked(so);
4925                                 socantsendmore(so);
4926                                 sctp_sowwakeup(inp, so);
4927                                 sctp_sorwakeup(inp, so);
4928                                 SCTP_SOWAKEUP(so);
4929                         }
4930                 }
4931         }
4932
4933         /*
4934          * Make it invalid too, that way if its about to run it will abort
4935          * and return.
4936          */
4937         /* re-increment the lock */
4938         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4939                 atomic_add_int(&stcb->asoc.refcnt, -1);
4940         }
4941         if (stcb->asoc.refcnt) {
4942                 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE);
4943                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4944                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4945                         SCTP_INP_INFO_WUNLOCK();
4946                         SCTP_INP_WUNLOCK(inp);
4947                 }
4948                 SCTP_TCB_UNLOCK(stcb);
4949                 return (0);
4950         }
4951         asoc->state = 0;
4952         if (inp->sctp_tcbhash) {
4953                 LIST_REMOVE(stcb, sctp_tcbhash);
4954         }
4955         if (stcb->asoc.in_asocid_hash) {
4956                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4957         }
4958         /* Now lets remove it from the list of ALL associations in the EP */
4959         LIST_REMOVE(stcb, sctp_tcblist);
4960         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4961                 SCTP_INP_INCR_REF(inp);
4962                 SCTP_INP_WUNLOCK(inp);
4963         }
4964         /* pull from vtag hash */
4965         LIST_REMOVE(stcb, sctp_asocs);
4966         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4967             inp->sctp_lport, stcb->rport);
4968
4969         /*
4970          * Now restop the timers to be sure this is paranoia at is finest!
4971          */
4972         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4973         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4974         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4975         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4976         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4977         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4978         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4979         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4980                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4981                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4982                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4983         }
4984
4985         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4986         /*
4987          * The chunk lists and such SHOULD be empty but we check them just
4988          * in case.
4989          */
4990         /* anything on the wheel needs to be removed */
4991         for (i = 0; i < asoc->streamoutcnt; i++) {
4992                 struct sctp_stream_out *outs;
4993
4994                 outs = &asoc->strmout[i];
4995                 /* now clean up any chunks here */
4996                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4997                         atomic_subtract_int(&asoc->stream_queue_cnt, 1);
4998                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4999                         stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0);
5000                         sctp_free_spbufspace(stcb, asoc, sp);
5001                         if (sp->data) {
5002                                 if (so) {
5003                                         /* Still an open socket - report */
5004                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
5005                                             0, (void *)sp, SCTP_SO_LOCKED);
5006                                 }
5007                                 if (sp->data) {
5008                                         sctp_m_freem(sp->data);
5009                                         sp->data = NULL;
5010                                         sp->tail_mbuf = NULL;
5011                                         sp->length = 0;
5012                                 }
5013                         }
5014                         if (sp->net) {
5015                                 sctp_free_remote_addr(sp->net);
5016                                 sp->net = NULL;
5017                         }
5018                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5019                 }
5020         }
5021         /* sa_ignore FREED_MEMORY */
5022         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5023                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5024                 SCTP_FREE(strrst, SCTP_M_STRESET);
5025         }
5026         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5027                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5028                 if (sq->data) {
5029                         sctp_m_freem(sq->data);
5030                         sq->data = NULL;
5031                 }
5032                 sctp_free_remote_addr(sq->whoFrom);
5033                 sq->whoFrom = NULL;
5034                 sq->stcb = NULL;
5035                 /* Free the ctl entry */
5036                 sctp_free_a_readq(stcb, sq);
5037                 /* sa_ignore FREED_MEMORY */
5038         }
5039         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5040                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5041                 if (chk->data) {
5042                         sctp_m_freem(chk->data);
5043                         chk->data = NULL;
5044                 }
5045                 if (chk->holds_key_ref)
5046                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5047                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5048                 SCTP_DECR_CHK_COUNT();
5049                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5050                 asoc->free_chunk_cnt--;
5051                 /* sa_ignore FREED_MEMORY */
5052         }
5053         /* pending send queue SHOULD be empty */
5054         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5055                 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5056                         asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5057 #ifdef INVARIANTS
5058                 } else {
5059                         panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5060 #endif
5061                 }
5062                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5063                 if (chk->data) {
5064                         if (so) {
5065                                 /* Still a socket? */
5066                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5067                                     0, chk, SCTP_SO_LOCKED);
5068                         }
5069                         if (chk->data) {
5070                                 sctp_m_freem(chk->data);
5071                                 chk->data = NULL;
5072                         }
5073                 }
5074                 if (chk->holds_key_ref)
5075                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5076                 if (chk->whoTo) {
5077                         sctp_free_remote_addr(chk->whoTo);
5078                         chk->whoTo = NULL;
5079                 }
5080                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5081                 SCTP_DECR_CHK_COUNT();
5082                 /* sa_ignore FREED_MEMORY */
5083         }
5084         /* sent queue SHOULD be empty */
5085         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5086                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5087                         if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) {
5088                                 asoc->strmout[chk->rec.data.sid].chunks_on_queues--;
5089 #ifdef INVARIANTS
5090                         } else {
5091                                 panic("No chunks on the queues for sid %u.", chk->rec.data.sid);
5092 #endif
5093                         }
5094                 }
5095                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5096                 if (chk->data) {
5097                         if (so) {
5098                                 /* Still a socket? */
5099                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5100                                     0, chk, SCTP_SO_LOCKED);
5101                         }
5102                         if (chk->data) {
5103                                 sctp_m_freem(chk->data);
5104                                 chk->data = NULL;
5105                         }
5106                 }
5107                 if (chk->holds_key_ref)
5108                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5109                 sctp_free_remote_addr(chk->whoTo);
5110                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5111                 SCTP_DECR_CHK_COUNT();
5112                 /* sa_ignore FREED_MEMORY */
5113         }
5114 #ifdef INVARIANTS
5115         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5116                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5117                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5118                 }
5119         }
5120 #endif
5121         /* control queue MAY not be empty */
5122         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5123                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5124                 if (chk->data) {
5125                         sctp_m_freem(chk->data);
5126                         chk->data = NULL;
5127                 }
5128                 if (chk->holds_key_ref)
5129                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5130                 sctp_free_remote_addr(chk->whoTo);
5131                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5132                 SCTP_DECR_CHK_COUNT();
5133                 /* sa_ignore FREED_MEMORY */
5134         }
5135         /* ASCONF queue MAY not be empty */
5136         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5137                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5138                 if (chk->data) {
5139                         sctp_m_freem(chk->data);
5140                         chk->data = NULL;
5141                 }
5142                 if (chk->holds_key_ref)
5143                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5144                 sctp_free_remote_addr(chk->whoTo);
5145                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5146                 SCTP_DECR_CHK_COUNT();
5147                 /* sa_ignore FREED_MEMORY */
5148         }
5149         if (asoc->mapping_array) {
5150                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5151                 asoc->mapping_array = NULL;
5152         }
5153         if (asoc->nr_mapping_array) {
5154                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5155                 asoc->nr_mapping_array = NULL;
5156         }
5157         /* the stream outs */
5158         if (asoc->strmout) {
5159                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5160                 asoc->strmout = NULL;
5161         }
5162         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5163         if (asoc->strmin) {
5164                 for (i = 0; i < asoc->streamincnt; i++) {
5165                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5166                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5167                 }
5168                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5169                 asoc->strmin = NULL;
5170         }
5171         asoc->streamincnt = 0;
5172         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5173 #ifdef INVARIANTS
5174                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5175                         panic("no net's left alloc'ed, or list points to itself");
5176                 }
5177 #endif
5178                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5179                 sctp_free_remote_addr(net);
5180         }
5181         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5182                 /* sa_ignore FREED_MEMORY */
5183                 sctp_remove_laddr(laddr);
5184         }
5185
5186         /* pending asconf (address) parameters */
5187         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5188                 /* sa_ignore FREED_MEMORY */
5189                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5190                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5191         }
5192         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5193                 /* sa_ignore FREED_MEMORY */
5194                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5195                 if (aack->data != NULL) {
5196                         sctp_m_freem(aack->data);
5197                 }
5198                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5199         }
5200         /* clean up auth stuff */
5201         if (asoc->local_hmacs)
5202                 sctp_free_hmaclist(asoc->local_hmacs);
5203         if (asoc->peer_hmacs)
5204                 sctp_free_hmaclist(asoc->peer_hmacs);
5205
5206         if (asoc->local_auth_chunks)
5207                 sctp_free_chunklist(asoc->local_auth_chunks);
5208         if (asoc->peer_auth_chunks)
5209                 sctp_free_chunklist(asoc->peer_auth_chunks);
5210
5211         sctp_free_authinfo(&asoc->authinfo);
5212
5213         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5214                 LIST_REMOVE(shared_key, next);
5215                 sctp_free_sharedkey(shared_key);
5216                 /* sa_ignore FREED_MEMORY */
5217         }
5218
5219         /* Insert new items here :> */
5220
5221         /* Get rid of LOCK */
5222         SCTP_TCB_UNLOCK(stcb);
5223         SCTP_TCB_LOCK_DESTROY(stcb);
5224         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5225         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5226                 SCTP_INP_INFO_WUNLOCK();
5227                 SCTP_INP_RLOCK(inp);
5228         }
5229 #ifdef SCTP_TRACK_FREED_ASOCS
5230         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5231                 /* now clean up the tasoc itself */
5232                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5233                 SCTP_DECR_ASOC_COUNT();
5234         } else {
5235                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5236         }
5237 #else
5238         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5239         SCTP_DECR_ASOC_COUNT();
5240 #endif
5241         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5242                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5243                         /*
5244                          * If its NOT the inp_free calling us AND sctp_close
5245                          * as been called, we call back...
5246                          */
5247                         SCTP_INP_RUNLOCK(inp);
5248                         /*
5249                          * This will start the kill timer (if we are the
5250                          * last one) since we hold an increment yet. But
5251                          * this is the only safe way to do this since
5252                          * otherwise if the socket closes at the same time
5253                          * we are here we might collide in the cleanup.
5254                          */
5255                         sctp_inpcb_free(inp,
5256                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5257                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5258                         SCTP_INP_DECR_REF(inp);
5259                         goto out_of;
5260                 } else {
5261                         /* The socket is still open. */
5262                         SCTP_INP_DECR_REF(inp);
5263                 }
5264         }
5265         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5266                 SCTP_INP_RUNLOCK(inp);
5267         }
5268 out_of:
5269         /* destroyed the asoc */
5270 #ifdef SCTP_LOG_CLOSING
5271         sctp_log_closing(inp, NULL, 11);
5272 #endif
5273         return (1);
5274 }
5275
5276
5277
5278 /*
5279  * determine if a destination is "reachable" based upon the addresses bound
5280  * to the current endpoint (e.g. only v4 or v6 currently bound)
5281  */
5282 /*
5283  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5284  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5285  * types bound as its endpoint
5286  */
5287 int
5288 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5289 {
5290         struct sctp_inpcb *inp;
5291         int answer;
5292
5293         /*
5294          * No locks here, the TCB, in all cases is already locked and an
5295          * assoc is up. There is either a INP lock by the caller applied (in
5296          * asconf case when deleting an address) or NOT in the HB case,
5297          * however if HB then the INP increment is up and the INP will not
5298          * be removed (on top of the fact that we have a TCB lock). So we
5299          * only want to read the sctp_flags, which is either bound-all or
5300          * not.. no protection needed since once an assoc is up you can't be
5301          * changing your binding.
5302          */
5303         inp = stcb->sctp_ep;
5304         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5305                 /* if bound all, destination is not restricted */
5306                 /*
5307                  * RRS: Question during lock work: Is this correct? If you
5308                  * are bound-all you still might need to obey the V4--V6
5309                  * flags??? IMO this bound-all stuff needs to be removed!
5310                  */
5311                 return (1);
5312         }
5313         /* NOTE: all "scope" checks are done when local addresses are added */
5314         switch (destaddr->sa_family) {
5315 #ifdef INET6
5316         case AF_INET6:
5317                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5318                 break;
5319 #endif
5320 #ifdef INET
5321         case AF_INET:
5322                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5323                 break;
5324 #endif
5325         default:
5326                 /* invalid family, so it's unreachable */
5327                 answer = 0;
5328                 break;
5329         }
5330         return (answer);
5331 }
5332
5333 /*
5334  * update the inp_vflags on an endpoint
5335  */
5336 static void
5337 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5338 {
5339         struct sctp_laddr *laddr;
5340
5341         /* first clear the flag */
5342         inp->ip_inp.inp.inp_vflag = 0;
5343         /* set the flag based on addresses on the ep list */
5344         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5345                 if (laddr->ifa == NULL) {
5346                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5347                             __func__);
5348                         continue;
5349                 }
5350
5351                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5352                         continue;
5353                 }
5354                 switch (laddr->ifa->address.sa.sa_family) {
5355 #ifdef INET6
5356                 case AF_INET6:
5357                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5358                         break;
5359 #endif
5360 #ifdef INET
5361                 case AF_INET:
5362                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5363                         break;
5364 #endif
5365                 default:
5366                         break;
5367                 }
5368         }
5369 }
5370
5371 /*
5372  * Add the address to the endpoint local address list There is nothing to be
5373  * done if we are bound to all addresses
5374  */
5375 void
5376 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5377 {
5378         struct sctp_laddr *laddr;
5379         struct sctp_tcb *stcb;
5380         int fnd, error = 0;
5381
5382         fnd = 0;
5383
5384         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5385                 /* You are already bound to all. You have it already */
5386                 return;
5387         }
5388 #ifdef INET6
5389         if (ifa->address.sa.sa_family == AF_INET6) {
5390                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5391                         /* Can't bind a non-useable addr. */
5392                         return;
5393                 }
5394         }
5395 #endif
5396         /* first, is it already present? */
5397         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5398                 if (laddr->ifa == ifa) {
5399                         fnd = 1;
5400                         break;
5401                 }
5402         }
5403
5404         if (fnd == 0) {
5405                 /* Not in the ep list */
5406                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5407                 if (error != 0)
5408                         return;
5409                 inp->laddr_count++;
5410                 /* update inp_vflag flags */
5411                 switch (ifa->address.sa.sa_family) {
5412 #ifdef INET6
5413                 case AF_INET6:
5414                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5415                         break;
5416 #endif
5417 #ifdef INET
5418                 case AF_INET:
5419                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5420                         break;
5421 #endif
5422                 default:
5423                         break;
5424                 }
5425                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5426                         sctp_add_local_addr_restricted(stcb, ifa);
5427                 }
5428         }
5429         return;
5430 }
5431
5432
5433 /*
5434  * select a new (hopefully reachable) destination net (should only be used
5435  * when we deleted an ep addr that is the only usable source address to reach
5436  * the destination net)
5437  */
5438 static void
5439 sctp_select_primary_destination(struct sctp_tcb *stcb)
5440 {
5441         struct sctp_nets *net;
5442
5443         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5444                 /* for now, we'll just pick the first reachable one we find */
5445                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5446                         continue;
5447                 if (sctp_destination_is_reachable(stcb,
5448                     (struct sockaddr *)&net->ro._l_addr)) {
5449                         /* found a reachable destination */
5450                         stcb->asoc.primary_destination = net;
5451                 }
5452         }
5453         /* I can't there from here! ...we're gonna die shortly... */
5454 }
5455
5456
5457 /*
5458  * Delete the address from the endpoint local address list. There is nothing
5459  * to be done if we are bound to all addresses
5460  */
5461 void
5462 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5463 {
5464         struct sctp_laddr *laddr;
5465         int fnd;
5466
5467         fnd = 0;
5468         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5469                 /* You are already bound to all. You have it already */
5470                 return;
5471         }
5472         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5473                 if (laddr->ifa == ifa) {
5474                         fnd = 1;
5475                         break;
5476                 }
5477         }
5478         if (fnd && (inp->laddr_count < 2)) {
5479                 /* can't delete unless there are at LEAST 2 addresses */
5480                 return;
5481         }
5482         if (fnd) {
5483                 /*
5484                  * clean up any use of this address go through our
5485                  * associations and clear any last_used_address that match
5486                  * this one for each assoc, see if a new primary_destination
5487                  * is needed
5488                  */
5489                 struct sctp_tcb *stcb;
5490
5491                 /* clean up "next_addr_touse" */
5492                 if (inp->next_addr_touse == laddr)
5493                         /* delete this address */
5494                         inp->next_addr_touse = NULL;
5495
5496                 /* clean up "last_used_address" */
5497                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5498                         struct sctp_nets *net;
5499
5500                         SCTP_TCB_LOCK(stcb);
5501                         if (stcb->asoc.last_used_address == laddr)
5502                                 /* delete this address */
5503                                 stcb->asoc.last_used_address = NULL;
5504                         /*
5505                          * Now spin through all the nets and purge any ref
5506                          * to laddr
5507                          */
5508                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5509                                 if (net->ro._s_addr == laddr->ifa) {
5510                                         /* Yep, purge src address selected */
5511                                         sctp_rtentry_t *rt;
5512
5513                                         /* delete this address if cached */
5514                                         rt = net->ro.ro_rt;
5515                                         if (rt != NULL) {
5516                                                 RTFREE(rt);
5517                                                 net->ro.ro_rt = NULL;
5518                                         }
5519                                         sctp_free_ifa(net->ro._s_addr);
5520                                         net->ro._s_addr = NULL;
5521                                         net->src_addr_selected = 0;
5522                                 }
5523                         }
5524                         SCTP_TCB_UNLOCK(stcb);
5525                 }               /* for each tcb */
5526                 /* remove it from the ep list */
5527                 sctp_remove_laddr(laddr);
5528                 inp->laddr_count--;
5529                 /* update inp_vflag flags */
5530                 sctp_update_ep_vflag(inp);
5531         }
5532         return;
5533 }
5534
5535 /*
5536  * Add the address to the TCB local address restricted list.
5537  * This is a "pending" address list (eg. addresses waiting for an
5538  * ASCONF-ACK response) and cannot be used as a valid source address.
5539  */
5540 void
5541 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5542 {
5543         struct sctp_laddr *laddr;
5544         struct sctpladdr *list;
5545
5546         /*
5547          * Assumes TCB is locked.. and possibly the INP. May need to
5548          * confirm/fix that if we need it and is not the case.
5549          */
5550         list = &stcb->asoc.sctp_restricted_addrs;
5551
5552 #ifdef INET6
5553         if (ifa->address.sa.sa_family == AF_INET6) {
5554                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5555                         /* Can't bind a non-existent addr. */
5556                         return;
5557                 }
5558         }
5559 #endif
5560         /* does the address already exist? */
5561         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5562                 if (laddr->ifa == ifa) {
5563                         return;
5564                 }
5565         }
5566
5567         /* add to the list */
5568         (void)sctp_insert_laddr(list, ifa, 0);
5569         return;
5570 }
5571
5572 /*
5573  * Remove a local address from the TCB local address restricted list
5574  */
5575 void
5576 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5577 {
5578         struct sctp_inpcb *inp;
5579         struct sctp_laddr *laddr;
5580
5581         /*
5582          * This is called by asconf work. It is assumed that a) The TCB is
5583          * locked and b) The INP is locked. This is true in as much as I can
5584          * trace through the entry asconf code where I did these locks.
5585          * Again, the ASCONF code is a bit different in that it does lock
5586          * the INP during its work often times. This must be since we don't
5587          * want other proc's looking up things while what they are looking
5588          * up is changing :-D
5589          */
5590
5591         inp = stcb->sctp_ep;
5592         /* if subset bound and don't allow ASCONF's, can't delete last */
5593         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5594             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5595                 if (stcb->sctp_ep->laddr_count < 2) {
5596                         /* can't delete last address */
5597                         return;
5598                 }
5599         }
5600         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5601                 /* remove the address if it exists */
5602                 if (laddr->ifa == NULL)
5603                         continue;
5604                 if (laddr->ifa == ifa) {
5605                         sctp_remove_laddr(laddr);
5606                         return;
5607                 }
5608         }
5609
5610         /* address not found! */
5611         return;
5612 }
5613
5614 /*
5615  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5616  */
5617 /* sysctl */
5618 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5619 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5620
5621
5622
5623 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5624 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5625 int *sctp_cpuarry = NULL;
5626 void
5627 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5628 {
5629         /* Queue a packet to a processor for the specified core */
5630         struct sctp_mcore_queue *qent;
5631         struct sctp_mcore_ctrl *wkq;
5632         int need_wake = 0;
5633
5634         if (sctp_mcore_workers == NULL) {
5635                 /* Something went way bad during setup */
5636                 sctp_input_with_port(m, off, 0);
5637                 return;
5638         }
5639         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5640             (sizeof(struct sctp_mcore_queue)),
5641             SCTP_M_MCORE);
5642         if (qent == NULL) {
5643                 /* This is trouble  */
5644                 sctp_input_with_port(m, off, 0);
5645                 return;
5646         }
5647         qent->vn = curvnet;
5648         qent->m = m;
5649         qent->off = off;
5650         qent->v6 = 0;
5651         wkq = &sctp_mcore_workers[cpu_to_use];
5652         SCTP_MCORE_QLOCK(wkq);
5653
5654         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5655         if (wkq->running == 0) {
5656                 need_wake = 1;
5657         }
5658         SCTP_MCORE_QUNLOCK(wkq);
5659         if (need_wake) {
5660                 wakeup(&wkq->running);
5661         }
5662 }
5663
5664 static void
5665 sctp_mcore_thread(void *arg)
5666 {
5667
5668         struct sctp_mcore_ctrl *wkq;
5669         struct sctp_mcore_queue *qent;
5670
5671         wkq = (struct sctp_mcore_ctrl *)arg;
5672         struct mbuf *m;
5673         int off, v6;
5674
5675         /* Wait for first tickle */
5676         SCTP_MCORE_LOCK(wkq);
5677         wkq->running = 0;
5678         msleep(&wkq->running,
5679             &wkq->core_mtx,
5680             0, "wait for pkt", 0);
5681         SCTP_MCORE_UNLOCK(wkq);
5682
5683         /* Bind to our cpu */
5684         thread_lock(curthread);
5685         sched_bind(curthread, wkq->cpuid);
5686         thread_unlock(curthread);
5687
5688         /* Now lets start working */
5689         SCTP_MCORE_LOCK(wkq);
5690         /* Now grab lock and go */
5691         for (;;) {
5692                 SCTP_MCORE_QLOCK(wkq);
5693 skip_sleep:
5694                 wkq->running = 1;
5695                 qent = TAILQ_FIRST(&wkq->que);
5696                 if (qent) {
5697                         TAILQ_REMOVE(&wkq->que, qent, next);
5698                         SCTP_MCORE_QUNLOCK(wkq);
5699                         CURVNET_SET(qent->vn);
5700                         m = qent->m;
5701                         off = qent->off;
5702                         v6 = qent->v6;
5703                         SCTP_FREE(qent, SCTP_M_MCORE);
5704                         if (v6 == 0) {
5705                                 sctp_input_with_port(m, off, 0);
5706                         } else {
5707                                 SCTP_PRINTF("V6 not yet supported\n");
5708                                 sctp_m_freem(m);
5709                         }
5710                         CURVNET_RESTORE();
5711                         SCTP_MCORE_QLOCK(wkq);
5712                 }
5713                 wkq->running = 0;
5714                 if (!TAILQ_EMPTY(&wkq->que)) {
5715                         goto skip_sleep;
5716                 }
5717                 SCTP_MCORE_QUNLOCK(wkq);
5718                 msleep(&wkq->running,
5719                     &wkq->core_mtx,
5720                     0, "wait for pkt", 0);
5721         }
5722 }
5723
5724 static void
5725 sctp_startup_mcore_threads(void)
5726 {
5727         int i, cpu;
5728
5729         if (mp_ncpus == 1)
5730                 return;
5731
5732         if (sctp_mcore_workers != NULL) {
5733                 /*
5734                  * Already been here in some previous vnet?
5735                  */
5736                 return;
5737         }
5738         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5739             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5740             SCTP_M_MCORE);
5741         if (sctp_mcore_workers == NULL) {
5742                 /* TSNH I hope */
5743                 return;
5744         }
5745         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5746             sizeof(struct sctp_mcore_ctrl)));
5747         /* Init the structures */
5748         for (i = 0; i <= mp_maxid; i++) {
5749                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5750                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5751                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5752                 sctp_mcore_workers[i].cpuid = i;
5753         }
5754         if (sctp_cpuarry == NULL) {
5755                 SCTP_MALLOC(sctp_cpuarry, int *,
5756                     (mp_ncpus * sizeof(int)),
5757                     SCTP_M_MCORE);
5758                 i = 0;
5759                 CPU_FOREACH(cpu) {
5760                         sctp_cpuarry[i] = cpu;
5761                         i++;
5762                 }
5763         }
5764
5765         /* Now start them all */
5766         CPU_FOREACH(cpu) {
5767                 (void)kproc_create(sctp_mcore_thread,
5768                     (void *)&sctp_mcore_workers[cpu],
5769                     &sctp_mcore_workers[cpu].thread_proc,
5770                     RFPROC,
5771                     SCTP_KTHREAD_PAGES,
5772                     SCTP_MCORE_NAME);
5773
5774         }
5775 }
5776 #endif
5777
5778 void
5779 sctp_pcb_init()
5780 {
5781         /*
5782          * SCTP initialization for the PCB structures should be called by
5783          * the sctp_init() function.
5784          */
5785         int i;
5786         struct timeval tv;
5787
5788         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5789                 /* error I was called twice */
5790                 return;
5791         }
5792         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5793
5794 #if defined(SCTP_LOCAL_TRACE_BUF)
5795         memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
5796 #endif
5797 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5798         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5799             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5800             SCTP_M_MCORE);
5801 #endif
5802         (void)SCTP_GETTIME_TIMEVAL(&tv);
5803 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5804         memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1));
5805         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec;
5806         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec;
5807 #else
5808         memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat));
5809         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec;
5810         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec;
5811 #endif
5812         /* init the empty list of (All) Endpoints */
5813         LIST_INIT(&SCTP_BASE_INFO(listhead));
5814
5815
5816         /* init the hash table of endpoints */
5817         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5818         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5819         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5820         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5821             &SCTP_BASE_INFO(hashasocmark));
5822         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5823             &SCTP_BASE_INFO(hashmark));
5824         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5825             &SCTP_BASE_INFO(hashtcpmark));
5826         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5827
5828
5829         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5830             &SCTP_BASE_INFO(hashvrfmark));
5831
5832         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5833             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5834         /* init the zones */
5835         /*
5836          * FIX ME: Should check for NULL returns, but if it does fail we are
5837          * doomed to panic anyways... add later maybe.
5838          */
5839         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5840             sizeof(struct sctp_inpcb), maxsockets);
5841
5842         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5843             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5846             sizeof(struct sctp_laddr),
5847             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5848
5849         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5850             sizeof(struct sctp_nets),
5851             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5852
5853         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5854             sizeof(struct sctp_tmit_chunk),
5855             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5856
5857         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5858             sizeof(struct sctp_queued_to_read),
5859             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5860
5861         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5862             sizeof(struct sctp_stream_queue_pending),
5863             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5864
5865         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5866             sizeof(struct sctp_asconf),
5867             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5868
5869         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5870             sizeof(struct sctp_asconf_ack),
5871             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5872
5873
5874         /* Master Lock INIT for info structure */
5875         SCTP_INP_INFO_LOCK_INIT();
5876         SCTP_STATLOG_INIT_LOCK();
5877
5878         SCTP_IPI_COUNT_INIT();
5879         SCTP_IPI_ADDR_INIT();
5880 #ifdef SCTP_PACKET_LOGGING
5881         SCTP_IP_PKTLOG_INIT();
5882 #endif
5883         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5884
5885         SCTP_WQ_ADDR_INIT();
5886         /* not sure if we need all the counts */
5887         SCTP_BASE_INFO(ipi_count_ep) = 0;
5888         /* assoc/tcb zone info */
5889         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5890         /* local addrlist zone info */
5891         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5892         /* remote addrlist zone info */
5893         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5894         /* chunk info */
5895         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5896
5897         /* socket queue zone info */
5898         SCTP_BASE_INFO(ipi_count_readq) = 0;
5899
5900         /* stream out queue cont */
5901         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5902
5903         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5904         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5905
5906         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5907
5908         /* Init the TIMEWAIT list */
5909         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5910                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5911         }
5912         sctp_startup_iterator();
5913
5914 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5915         sctp_startup_mcore_threads();
5916 #endif
5917
5918         /*
5919          * INIT the default VRF which for BSD is the only one, other O/S's
5920          * may have more. But initially they must start with one and then
5921          * add the VRF's as addresses are added.
5922          */
5923         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5924 }
5925
5926 /*
5927  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5928  */
5929 void
5930 sctp_pcb_finish(void)
5931 {
5932         struct sctp_vrflist *vrf_bucket;
5933         struct sctp_vrf *vrf, *nvrf;
5934         struct sctp_ifn *ifn, *nifn;
5935         struct sctp_ifa *ifa, *nifa;
5936         struct sctpvtaghead *chain;
5937         struct sctp_tagblock *twait_block, *prev_twait_block;
5938         struct sctp_laddr *wi, *nwi;
5939         int i;
5940         struct sctp_iterator *it, *nit;
5941
5942         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5943                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5944                 return;
5945         }
5946         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5947         /*
5948          * In FreeBSD the iterator thread never exits but we do clean up.
5949          * The only way FreeBSD reaches here is if we have VRF's but we
5950          * still add the ifdef to make it compile on old versions.
5951          */
5952 retry:
5953         SCTP_IPI_ITERATOR_WQ_LOCK();
5954         /*
5955          * sctp_iterator_worker() might be working on an it entry without
5956          * holding the lock.  We won't find it on the list either and
5957          * continue and free/destroy it.  While holding the lock, spin, to
5958          * avoid the race condition as sctp_iterator_worker() will have to
5959          * wait to re-aquire the lock.
5960          */
5961         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5962                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5963                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5964                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5965                 DELAY(10);
5966                 goto retry;
5967         }
5968         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5969                 if (it->vn != curvnet) {
5970                         continue;
5971                 }
5972                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5973                 if (it->function_atend != NULL) {
5974                         (*it->function_atend) (it->pointer, it->val);
5975                 }
5976                 SCTP_FREE(it, SCTP_M_ITER);
5977         }
5978         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5979         SCTP_ITERATOR_LOCK();
5980         if ((sctp_it_ctl.cur_it) &&
5981             (sctp_it_ctl.cur_it->vn == curvnet)) {
5982                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5983         }
5984         SCTP_ITERATOR_UNLOCK();
5985         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5986         SCTP_WQ_ADDR_LOCK();
5987         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5988                 LIST_REMOVE(wi, sctp_nxt_addr);
5989                 SCTP_DECR_LADDR_COUNT();
5990                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5991                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5992                 }
5993                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5994         }
5995         SCTP_WQ_ADDR_UNLOCK();
5996
5997         /*
5998          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5999          * destroyed first).
6000          */
6001         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
6002         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
6003                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
6004                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
6005                                 /* free the ifa */
6006                                 LIST_REMOVE(ifa, next_bucket);
6007                                 LIST_REMOVE(ifa, next_ifa);
6008                                 SCTP_FREE(ifa, SCTP_M_IFA);
6009                         }
6010                         /* free the ifn */
6011                         LIST_REMOVE(ifn, next_bucket);
6012                         LIST_REMOVE(ifn, next_ifn);
6013                         SCTP_FREE(ifn, SCTP_M_IFN);
6014                 }
6015                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6016                 /* free the vrf */
6017                 LIST_REMOVE(vrf, next_vrf);
6018                 SCTP_FREE(vrf, SCTP_M_VRF);
6019         }
6020         /* free the vrf hashes */
6021         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6022         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6023
6024         /*
6025          * free the TIMEWAIT list elements malloc'd in the function
6026          * sctp_add_vtag_to_timewait()...
6027          */
6028         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6029                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6030                 if (!LIST_EMPTY(chain)) {
6031                         prev_twait_block = NULL;
6032                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6033                                 if (prev_twait_block) {
6034                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6035                                 }
6036                                 prev_twait_block = twait_block;
6037                         }
6038                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6039                 }
6040         }
6041
6042         /* free the locks and mutexes */
6043 #ifdef SCTP_PACKET_LOGGING
6044         SCTP_IP_PKTLOG_DESTROY();
6045 #endif
6046         SCTP_IPI_ADDR_DESTROY();
6047         SCTP_STATLOG_DESTROY();
6048         SCTP_INP_INFO_LOCK_DESTROY();
6049
6050         SCTP_WQ_ADDR_DESTROY();
6051
6052         /* Get rid of other stuff too. */
6053         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6054                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6055         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6056                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6057         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6058                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6059
6060         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6061         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6062         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6063         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6064         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6065         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6066         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6067         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6068         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6069 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6070         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6071 #endif
6072 }
6073
6074
6075 int
6076 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6077     int offset, int limit,
6078     struct sockaddr *src, struct sockaddr *dst,
6079     struct sockaddr *altsa, uint16_t port)
6080 {
6081         /*
6082          * grub through the INIT pulling addresses and loading them to the
6083          * nets structure in the asoc. The from address in the mbuf should
6084          * also be loaded (if it is not already). This routine can be called
6085          * with either INIT or INIT-ACK's as long as the m points to the IP
6086          * packet and the offset points to the beginning of the parameters.
6087          */
6088         struct sctp_inpcb *inp;
6089         struct sctp_nets *net, *nnet, *net_tmp;
6090         struct sctp_paramhdr *phdr, param_buf;
6091         struct sctp_tcb *stcb_tmp;
6092         uint16_t ptype, plen;
6093         struct sockaddr *sa;
6094         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6095         struct sctp_auth_random *p_random = NULL;
6096         uint16_t random_len = 0;
6097         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6098         struct sctp_auth_hmac_algo *hmacs = NULL;
6099         uint16_t hmacs_len = 0;
6100         uint8_t saw_asconf = 0;
6101         uint8_t saw_asconf_ack = 0;
6102         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6103         struct sctp_auth_chunk_list *chunks = NULL;
6104         uint16_t num_chunks = 0;
6105         sctp_key_t *new_key;
6106         uint32_t keylen;
6107         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6108         uint8_t peer_supports_ecn;
6109         uint8_t peer_supports_prsctp;
6110         uint8_t peer_supports_auth;
6111         uint8_t peer_supports_asconf;
6112         uint8_t peer_supports_asconf_ack;
6113         uint8_t peer_supports_reconfig;
6114         uint8_t peer_supports_nrsack;
6115         uint8_t peer_supports_pktdrop;
6116         uint8_t peer_supports_idata;
6117 #ifdef INET
6118         struct sockaddr_in sin;
6119 #endif
6120 #ifdef INET6
6121         struct sockaddr_in6 sin6;
6122 #endif
6123
6124         /* First get the destination address setup too. */
6125 #ifdef INET
6126         memset(&sin, 0, sizeof(sin));
6127         sin.sin_family = AF_INET;
6128         sin.sin_len = sizeof(sin);
6129         sin.sin_port = stcb->rport;
6130 #endif
6131 #ifdef INET6
6132         memset(&sin6, 0, sizeof(sin6));
6133         sin6.sin6_family = AF_INET6;
6134         sin6.sin6_len = sizeof(struct sockaddr_in6);
6135         sin6.sin6_port = stcb->rport;
6136 #endif
6137         if (altsa) {
6138                 sa = altsa;
6139         } else {
6140                 sa = src;
6141         }
6142         peer_supports_idata = 0;
6143         peer_supports_ecn = 0;
6144         peer_supports_prsctp = 0;
6145         peer_supports_auth = 0;
6146         peer_supports_asconf = 0;
6147         peer_supports_reconfig = 0;
6148         peer_supports_nrsack = 0;
6149         peer_supports_pktdrop = 0;
6150         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6151                 /* mark all addresses that we have currently on the list */
6152                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6153         }
6154         /* does the source address already exist? if so skip it */
6155         inp = stcb->sctp_ep;
6156         atomic_add_int(&stcb->asoc.refcnt, 1);
6157         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6158         atomic_add_int(&stcb->asoc.refcnt, -1);
6159
6160         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6161                 /* we must add the source address */
6162                 /* no scope set here since we have a tcb already. */
6163                 switch (sa->sa_family) {
6164 #ifdef INET
6165                 case AF_INET:
6166                         if (stcb->asoc.scope.ipv4_addr_legal) {
6167                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6168                                         return (-1);
6169                                 }
6170                         }
6171                         break;
6172 #endif
6173 #ifdef INET6
6174                 case AF_INET6:
6175                         if (stcb->asoc.scope.ipv6_addr_legal) {
6176                                 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6177                                         return (-2);
6178                                 }
6179                         }
6180                         break;
6181 #endif
6182                 default:
6183                         break;
6184                 }
6185         } else {
6186                 if (net_tmp != NULL && stcb_tmp == stcb) {
6187                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6188                 } else if (stcb_tmp != stcb) {
6189                         /* It belongs to another association? */
6190                         if (stcb_tmp)
6191                                 SCTP_TCB_UNLOCK(stcb_tmp);
6192                         return (-3);
6193                 }
6194         }
6195         if (stcb->asoc.state == 0) {
6196                 /* the assoc was freed? */
6197                 return (-4);
6198         }
6199         /* now we must go through each of the params. */
6200         phdr = sctp_get_next_param(m, offset, &param_buf, sizeof(param_buf));
6201         while (phdr) {
6202                 ptype = ntohs(phdr->param_type);
6203                 plen = ntohs(phdr->param_length);
6204                 /*
6205                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6206                  * (uint32_t)ptype, (int)plen);
6207                  */
6208                 if (offset + plen > limit) {
6209                         break;
6210                 }
6211                 if (plen == 0) {
6212                         break;
6213                 }
6214 #ifdef INET
6215                 if (ptype == SCTP_IPV4_ADDRESS) {
6216                         if (stcb->asoc.scope.ipv4_addr_legal) {
6217                                 struct sctp_ipv4addr_param *p4, p4_buf;
6218
6219                                 /* ok get the v4 address and check/add */
6220                                 phdr = sctp_get_next_param(m, offset,
6221                                     (struct sctp_paramhdr *)&p4_buf,
6222                                     sizeof(p4_buf));
6223                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6224                                     phdr == NULL) {
6225                                         return (-5);
6226                                 }
6227                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6228                                 sin.sin_addr.s_addr = p4->addr;
6229                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6230                                         /* Skip multi-cast addresses */
6231                                         goto next_param;
6232                                 }
6233                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6234                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6235                                         goto next_param;
6236                                 }
6237                                 sa = (struct sockaddr *)&sin;
6238                                 inp = stcb->sctp_ep;
6239                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6240                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6241                                     dst, stcb);
6242                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6243
6244                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6245                                     inp == NULL) {
6246                                         /* we must add the source address */
6247                                         /*
6248                                          * no scope set since we have a tcb
6249                                          * already
6250                                          */
6251
6252                                         /*
6253                                          * we must validate the state again
6254                                          * here
6255                                          */
6256                         add_it_now:
6257                                         if (stcb->asoc.state == 0) {
6258                                                 /* the assoc was freed? */
6259                                                 return (-7);
6260                                         }
6261                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6262                                                 return (-8);
6263                                         }
6264                                 } else if (stcb_tmp == stcb) {
6265                                         if (stcb->asoc.state == 0) {
6266                                                 /* the assoc was freed? */
6267                                                 return (-10);
6268                                         }
6269                                         if (net != NULL) {
6270                                                 /* clear flag */
6271                                                 net->dest_state &=
6272                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6273                                         }
6274                                 } else {
6275                                         /*
6276                                          * strange, address is in another
6277                                          * assoc? straighten out locks.
6278                                          */
6279                                         if (stcb_tmp) {
6280                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6281                                                         struct mbuf *op_err;
6282                                                         char msg[SCTP_DIAG_INFO_LEN];
6283
6284                                                         /*
6285                                                          * in setup state we
6286                                                          * abort this guy
6287                                                          */
6288                                                         snprintf(msg, sizeof(msg),
6289                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6290                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6291                                                             msg);
6292                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6293                                                             stcb_tmp, op_err,
6294                                                             SCTP_SO_NOT_LOCKED);
6295                                                         goto add_it_now;
6296                                                 }
6297                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6298                                         }
6299
6300                                         if (stcb->asoc.state == 0) {
6301                                                 /* the assoc was freed? */
6302                                                 return (-12);
6303                                         }
6304                                         return (-13);
6305                                 }
6306                         }
6307                 } else
6308 #endif
6309 #ifdef INET6
6310                 if (ptype == SCTP_IPV6_ADDRESS) {
6311                         if (stcb->asoc.scope.ipv6_addr_legal) {
6312                                 /* ok get the v6 address and check/add */
6313                                 struct sctp_ipv6addr_param *p6, p6_buf;
6314
6315                                 phdr = sctp_get_next_param(m, offset,
6316                                     (struct sctp_paramhdr *)&p6_buf,
6317                                     sizeof(p6_buf));
6318                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6319                                     phdr == NULL) {
6320                                         return (-14);
6321                                 }
6322                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6323                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6324                                     sizeof(p6->addr));
6325                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6326                                         /* Skip multi-cast addresses */
6327                                         goto next_param;
6328                                 }
6329                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6330                                         /*
6331                                          * Link local make no sense without
6332                                          * scope
6333                                          */
6334                                         goto next_param;
6335                                 }
6336                                 sa = (struct sockaddr *)&sin6;
6337                                 inp = stcb->sctp_ep;
6338                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6339                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6340                                     dst, stcb);
6341                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6342                                 if (stcb_tmp == NULL &&
6343                                     (inp == stcb->sctp_ep || inp == NULL)) {
6344                                         /*
6345                                          * we must validate the state again
6346                                          * here
6347                                          */
6348                         add_it_now6:
6349                                         if (stcb->asoc.state == 0) {
6350                                                 /* the assoc was freed? */
6351                                                 return (-16);
6352                                         }
6353                                         /*
6354                                          * we must add the address, no scope
6355                                          * set
6356                                          */
6357                                         if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6358                                                 return (-17);
6359                                         }
6360                                 } else if (stcb_tmp == stcb) {
6361                                         /*
6362                                          * we must validate the state again
6363                                          * here
6364                                          */
6365                                         if (stcb->asoc.state == 0) {
6366                                                 /* the assoc was freed? */
6367                                                 return (-19);
6368                                         }
6369                                         if (net != NULL) {
6370                                                 /* clear flag */
6371                                                 net->dest_state &=
6372                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6373                                         }
6374                                 } else {
6375                                         /*
6376                                          * strange, address is in another
6377                                          * assoc? straighten out locks.
6378                                          */
6379                                         if (stcb_tmp) {
6380                                                 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) {
6381                                                         struct mbuf *op_err;
6382                                                         char msg[SCTP_DIAG_INFO_LEN];
6383
6384                                                         /*
6385                                                          * in setup state we
6386                                                          * abort this guy
6387                                                          */
6388                                                         snprintf(msg, sizeof(msg),
6389                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6390                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6391                                                             msg);
6392                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6393                                                             stcb_tmp, op_err,
6394                                                             SCTP_SO_NOT_LOCKED);
6395                                                         goto add_it_now6;
6396                                                 }
6397                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6398                                         }
6399                                         if (stcb->asoc.state == 0) {
6400                                                 /* the assoc was freed? */
6401                                                 return (-21);
6402                                         }
6403                                         return (-22);
6404                                 }
6405                         }
6406                 } else
6407 #endif
6408                 if (ptype == SCTP_ECN_CAPABLE) {
6409                         peer_supports_ecn = 1;
6410                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6411                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6412                                 struct sctp_adaptation_layer_indication ai,
6413                                                                 *aip;
6414
6415                                 phdr = sctp_get_next_param(m, offset,
6416                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6417                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6418                                 if (aip) {
6419                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6420                                         stcb->asoc.adaptation_needed = 1;
6421                                 }
6422                         }
6423                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6424                         struct sctp_asconf_addr_param lstore, *fee;
6425                         int lptype;
6426                         struct sockaddr *lsa = NULL;
6427 #ifdef INET
6428                         struct sctp_asconf_addrv4_param *fii;
6429 #endif
6430
6431                         if (stcb->asoc.asconf_supported == 0) {
6432                                 return (-100);
6433                         }
6434                         if (plen > sizeof(lstore)) {
6435                                 return (-23);
6436                         }
6437                         phdr = sctp_get_next_param(m, offset,
6438                             (struct sctp_paramhdr *)&lstore,
6439                             plen);
6440                         if (phdr == NULL) {
6441                                 return (-24);
6442                         }
6443                         fee = (struct sctp_asconf_addr_param *)phdr;
6444                         lptype = ntohs(fee->addrp.ph.param_type);
6445                         switch (lptype) {
6446 #ifdef INET
6447                         case SCTP_IPV4_ADDRESS:
6448                                 if (plen !=
6449                                     sizeof(struct sctp_asconf_addrv4_param)) {
6450                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6451                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6452                                             plen);
6453                                 } else {
6454                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6455                                         sin.sin_addr.s_addr = fii->addrp.addr;
6456                                         lsa = (struct sockaddr *)&sin;
6457                                 }
6458                                 break;
6459 #endif
6460 #ifdef INET6
6461                         case SCTP_IPV6_ADDRESS:
6462                                 if (plen !=
6463                                     sizeof(struct sctp_asconf_addr_param)) {
6464                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6465                                             (int)sizeof(struct sctp_asconf_addr_param),
6466                                             plen);
6467                                 } else {
6468                                         memcpy(sin6.sin6_addr.s6_addr,
6469                                             fee->addrp.addr,
6470                                             sizeof(fee->addrp.addr));
6471                                         lsa = (struct sockaddr *)&sin6;
6472                                 }
6473                                 break;
6474 #endif
6475                         default:
6476                                 break;
6477                         }
6478                         if (lsa) {
6479                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6480                         }
6481                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6482                         stcb->asoc.peer_supports_nat = 1;
6483                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6484                         /* Peer supports pr-sctp */
6485                         peer_supports_prsctp = 1;
6486                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6487                         /* A supported extension chunk */
6488                         struct sctp_supported_chunk_types_param *pr_supported;
6489                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6490                         int num_ent, i;
6491
6492                         if (plen > sizeof(local_store)) {
6493                                 return (-35);
6494                         }
6495                         phdr = sctp_get_next_param(m, offset,
6496                             (struct sctp_paramhdr *)&local_store, plen);
6497                         if (phdr == NULL) {
6498                                 return (-25);
6499                         }
6500                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6501                         num_ent = plen - sizeof(struct sctp_paramhdr);
6502                         for (i = 0; i < num_ent; i++) {
6503                                 switch (pr_supported->chunk_types[i]) {
6504                                 case SCTP_ASCONF:
6505                                         peer_supports_asconf = 1;
6506                                         break;
6507                                 case SCTP_ASCONF_ACK:
6508                                         peer_supports_asconf_ack = 1;
6509                                         break;
6510                                 case SCTP_FORWARD_CUM_TSN:
6511                                         peer_supports_prsctp = 1;
6512                                         break;
6513                                 case SCTP_PACKET_DROPPED:
6514                                         peer_supports_pktdrop = 1;
6515                                         break;
6516                                 case SCTP_NR_SELECTIVE_ACK:
6517                                         peer_supports_nrsack = 1;
6518                                         break;
6519                                 case SCTP_STREAM_RESET:
6520                                         peer_supports_reconfig = 1;
6521                                         break;
6522                                 case SCTP_AUTHENTICATION:
6523                                         peer_supports_auth = 1;
6524                                         break;
6525                                 case SCTP_IDATA:
6526                                         peer_supports_idata = 1;
6527                                         break;
6528                                 default:
6529                                         /* one I have not learned yet */
6530                                         break;
6531
6532                                 }
6533                         }
6534                 } else if (ptype == SCTP_RANDOM) {
6535                         if (plen > sizeof(random_store))
6536                                 break;
6537                         if (got_random) {
6538                                 /* already processed a RANDOM */
6539                                 goto next_param;
6540                         }
6541                         phdr = sctp_get_next_param(m, offset,
6542                             (struct sctp_paramhdr *)random_store,
6543                             plen);
6544                         if (phdr == NULL)
6545                                 return (-26);
6546                         p_random = (struct sctp_auth_random *)phdr;
6547                         random_len = plen - sizeof(*p_random);
6548                         /* enforce the random length */
6549                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6550                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6551                                 return (-27);
6552                         }
6553                         got_random = 1;
6554                 } else if (ptype == SCTP_HMAC_LIST) {
6555                         uint16_t num_hmacs;
6556                         uint16_t i;
6557
6558                         if (plen > sizeof(hmacs_store))
6559                                 break;
6560                         if (got_hmacs) {
6561                                 /* already processed a HMAC list */
6562                                 goto next_param;
6563                         }
6564                         phdr = sctp_get_next_param(m, offset,
6565                             (struct sctp_paramhdr *)hmacs_store,
6566                             plen);
6567                         if (phdr == NULL)
6568                                 return (-28);
6569                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6570                         hmacs_len = plen - sizeof(*hmacs);
6571                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6572                         /* validate the hmac list */
6573                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6574                                 return (-29);
6575                         }
6576                         if (stcb->asoc.peer_hmacs != NULL)
6577                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6578                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6579                         if (stcb->asoc.peer_hmacs != NULL) {
6580                                 for (i = 0; i < num_hmacs; i++) {
6581                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6582                                             ntohs(hmacs->hmac_ids[i]));
6583                                 }
6584                         }
6585                         got_hmacs = 1;
6586                 } else if (ptype == SCTP_CHUNK_LIST) {
6587                         int i;
6588
6589                         if (plen > sizeof(chunks_store))
6590                                 break;
6591                         if (got_chklist) {
6592                                 /* already processed a Chunks list */
6593                                 goto next_param;
6594                         }
6595                         phdr = sctp_get_next_param(m, offset,
6596                             (struct sctp_paramhdr *)chunks_store,
6597                             plen);
6598                         if (phdr == NULL)
6599                                 return (-30);
6600                         chunks = (struct sctp_auth_chunk_list *)phdr;
6601                         num_chunks = plen - sizeof(*chunks);
6602                         if (stcb->asoc.peer_auth_chunks != NULL)
6603                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6604                         else
6605                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6606                         for (i = 0; i < num_chunks; i++) {
6607                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6608                                     stcb->asoc.peer_auth_chunks);
6609                                 /* record asconf/asconf-ack if listed */
6610                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6611                                         saw_asconf = 1;
6612                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6613                                         saw_asconf_ack = 1;
6614
6615                         }
6616                         got_chklist = 1;
6617                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6618                             (ptype == SCTP_STATE_COOKIE) ||
6619                             (ptype == SCTP_UNRECOG_PARAM) ||
6620                             (ptype == SCTP_COOKIE_PRESERVE) ||
6621                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6622                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6623                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6624                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6625                     (ptype == SCTP_SUCCESS_REPORT)) {
6626                          /* don't care */ ;
6627                 } else {
6628                         if ((ptype & 0x8000) == 0x0000) {
6629                                 /*
6630                                  * must stop processing the rest of the
6631                                  * param's. Any report bits were handled
6632                                  * with the call to
6633                                  * sctp_arethere_unrecognized_parameters()
6634                                  * when the INIT or INIT-ACK was first seen.
6635                                  */
6636                                 break;
6637                         }
6638                 }
6639
6640 next_param:
6641                 offset += SCTP_SIZE32(plen);
6642                 if (offset >= limit) {
6643                         break;
6644                 }
6645                 phdr = sctp_get_next_param(m, offset, &param_buf,
6646                     sizeof(param_buf));
6647         }
6648         /* Now check to see if we need to purge any addresses */
6649         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6650                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6651                     SCTP_ADDR_NOT_IN_ASSOC) {
6652                         /* This address has been removed from the asoc */
6653                         /* remove and free it */
6654                         stcb->asoc.numnets--;
6655                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6656                         sctp_free_remote_addr(net);
6657                         if (net == stcb->asoc.primary_destination) {
6658                                 stcb->asoc.primary_destination = NULL;
6659                                 sctp_select_primary_destination(stcb);
6660                         }
6661                 }
6662         }
6663         if ((stcb->asoc.ecn_supported == 1) &&
6664             (peer_supports_ecn == 0)) {
6665                 stcb->asoc.ecn_supported = 0;
6666         }
6667         if ((stcb->asoc.prsctp_supported == 1) &&
6668             (peer_supports_prsctp == 0)) {
6669                 stcb->asoc.prsctp_supported = 0;
6670         }
6671         if ((stcb->asoc.auth_supported == 1) &&
6672             ((peer_supports_auth == 0) ||
6673             (got_random == 0) || (got_hmacs == 0))) {
6674                 stcb->asoc.auth_supported = 0;
6675         }
6676         if ((stcb->asoc.asconf_supported == 1) &&
6677             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6678             (stcb->asoc.auth_supported == 0) ||
6679             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6680                 stcb->asoc.asconf_supported = 0;
6681         }
6682         if ((stcb->asoc.reconfig_supported == 1) &&
6683             (peer_supports_reconfig == 0)) {
6684                 stcb->asoc.reconfig_supported = 0;
6685         }
6686         if ((stcb->asoc.idata_supported == 1) &&
6687             (peer_supports_idata == 0)) {
6688                 stcb->asoc.idata_supported = 0;
6689         }
6690         if ((stcb->asoc.nrsack_supported == 1) &&
6691             (peer_supports_nrsack == 0)) {
6692                 stcb->asoc.nrsack_supported = 0;
6693         }
6694         if ((stcb->asoc.pktdrop_supported == 1) &&
6695             (peer_supports_pktdrop == 0)) {
6696                 stcb->asoc.pktdrop_supported = 0;
6697         }
6698         /* validate authentication required parameters */
6699         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6700                 /* peer does not support auth but sent a chunks list? */
6701                 return (-31);
6702         }
6703         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6704                 /* peer supports asconf but not auth? */
6705                 return (-32);
6706         } else if ((peer_supports_asconf == 1) &&
6707                     (peer_supports_auth == 1) &&
6708             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6709                 return (-33);
6710         }
6711         /* concatenate the full random key */
6712         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6713         if (chunks != NULL) {
6714                 keylen += sizeof(*chunks) + num_chunks;
6715         }
6716         new_key = sctp_alloc_key(keylen);
6717         if (new_key != NULL) {
6718                 /* copy in the RANDOM */
6719                 if (p_random != NULL) {
6720                         keylen = sizeof(*p_random) + random_len;
6721                         memcpy(new_key->key, p_random, keylen);
6722                 } else {
6723                         keylen = 0;
6724                 }
6725                 /* append in the AUTH chunks */
6726                 if (chunks != NULL) {
6727                         memcpy(new_key->key + keylen, chunks,
6728                             sizeof(*chunks) + num_chunks);
6729                         keylen += sizeof(*chunks) + num_chunks;
6730                 }
6731                 /* append in the HMACs */
6732                 if (hmacs != NULL) {
6733                         memcpy(new_key->key + keylen, hmacs,
6734                             sizeof(*hmacs) + hmacs_len);
6735                 }
6736         } else {
6737                 /* failed to get memory for the key */
6738                 return (-34);
6739         }
6740         if (stcb->asoc.authinfo.peer_random != NULL)
6741                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6742         stcb->asoc.authinfo.peer_random = new_key;
6743         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6744         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6745
6746         return (0);
6747 }
6748
6749 int
6750 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6751     struct sctp_nets *net)
6752 {
6753         /* make sure the requested primary address exists in the assoc */
6754         if (net == NULL && sa)
6755                 net = sctp_findnet(stcb, sa);
6756
6757         if (net == NULL) {
6758                 /* didn't find the requested primary address! */
6759                 return (-1);
6760         } else {
6761                 /* set the primary address */
6762                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6763                         /* Must be confirmed, so queue to set */
6764                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6765                         return (0);
6766                 }
6767                 stcb->asoc.primary_destination = net;
6768                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6769                         sctp_free_remote_addr(stcb->asoc.alternate);
6770                         stcb->asoc.alternate = NULL;
6771                 }
6772                 net = TAILQ_FIRST(&stcb->asoc.nets);
6773                 if (net != stcb->asoc.primary_destination) {
6774                         /*
6775                          * first one on the list is NOT the primary
6776                          * sctp_cmpaddr() is much more efficient if the
6777                          * primary is the first on the list, make it so.
6778                          */
6779                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6780                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6781                 }
6782                 return (0);
6783         }
6784 }
6785
6786 int
6787 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6788 {
6789         /*
6790          * This function serves two purposes. It will see if a TAG can be
6791          * re-used and return 1 for yes it is ok and 0 for don't use that
6792          * tag. A secondary function it will do is purge out old tags that
6793          * can be removed.
6794          */
6795         struct sctpvtaghead *chain;
6796         struct sctp_tagblock *twait_block;
6797         struct sctpasochead *head;
6798         struct sctp_tcb *stcb;
6799         int i;
6800
6801         SCTP_INP_INFO_RLOCK();
6802         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6803             SCTP_BASE_INFO(hashasocmark))];
6804         LIST_FOREACH(stcb, head, sctp_asocs) {
6805                 /*
6806                  * We choose not to lock anything here. TCB's can't be
6807                  * removed since we have the read lock, so they can't be
6808                  * freed on us, same thing for the INP. I may be wrong with
6809                  * this assumption, but we will go with it for now :-)
6810                  */
6811                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6812                         continue;
6813                 }
6814                 if (stcb->asoc.my_vtag == tag) {
6815                         /* candidate */
6816                         if (stcb->rport != rport) {
6817                                 continue;
6818                         }
6819                         if (stcb->sctp_ep->sctp_lport != lport) {
6820                                 continue;
6821                         }
6822                         /* Its a used tag set */
6823                         SCTP_INP_INFO_RUNLOCK();
6824                         return (0);
6825                 }
6826         }
6827         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6828         /* Now what about timed wait ? */
6829         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6830                 /*
6831                  * Block(s) are present, lets see if we have this tag in the
6832                  * list
6833                  */
6834                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6835                         if (twait_block->vtag_block[i].v_tag == 0) {
6836                                 /* not used */
6837                                 continue;
6838                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6839                             now->tv_sec) {
6840                                 /* Audit expires this guy */
6841                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6842                                 twait_block->vtag_block[i].v_tag = 0;
6843                                 twait_block->vtag_block[i].lport = 0;
6844                                 twait_block->vtag_block[i].rport = 0;
6845                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6846                                     (twait_block->vtag_block[i].lport == lport) &&
6847                             (twait_block->vtag_block[i].rport == rport)) {
6848                                 /* Bad tag, sorry :< */
6849                                 SCTP_INP_INFO_RUNLOCK();
6850                                 return (0);
6851                         }
6852                 }
6853         }
6854         SCTP_INP_INFO_RUNLOCK();
6855         return (1);
6856 }
6857
6858 static void
6859 sctp_drain_mbufs(struct sctp_tcb *stcb)
6860 {
6861         /*
6862          * We must hunt this association for MBUF's past the cumack (i.e.
6863          * out of order data that we can renege on).
6864          */
6865         struct sctp_association *asoc;
6866         struct sctp_tmit_chunk *chk, *nchk;
6867         uint32_t cumulative_tsn_p1;
6868         struct sctp_queued_to_read *control, *ncontrol;
6869         int cnt, strmat;
6870         uint32_t gap, i;
6871         int fnd = 0;
6872
6873         /* We look for anything larger than the cum-ack + 1 */
6874
6875         asoc = &stcb->asoc;
6876         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6877                 /* none we can reneg on. */
6878                 return;
6879         }
6880         SCTP_STAT_INCR(sctps_protocol_drains_done);
6881         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6882         cnt = 0;
6883         /* Ok that was fun, now we will drain all the inbound streams? */
6884         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6885                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) {
6886 #ifdef INVARIANTS
6887                         if (control->on_strm_q != SCTP_ON_ORDERED) {
6888                                 panic("Huh control: %p on_q: %d -- not ordered?",
6889                                     control, control->on_strm_q);
6890                         }
6891 #endif
6892                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6893                                 /* Yep it is above cum-ack */
6894                                 cnt++;
6895                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6896                                 KASSERT(control->length > 0, ("control has zero length"));
6897                                 if (asoc->size_on_all_streams >= control->length) {
6898                                         asoc->size_on_all_streams -= control->length;
6899                                 } else {
6900 #ifdef INVARIANTS
6901                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6902 #else
6903                                         asoc->size_on_all_streams = 0;
6904 #endif
6905                                 }
6906                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6907                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6908                                 if (control->on_read_q) {
6909                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6910                                         control->on_read_q = 0;
6911                                 }
6912                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm);
6913                                 control->on_strm_q = 0;
6914                                 if (control->data) {
6915                                         sctp_m_freem(control->data);
6916                                         control->data = NULL;
6917                                 }
6918                                 sctp_free_remote_addr(control->whoFrom);
6919                                 /* Now its reasm? */
6920                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6921                                         cnt++;
6922                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6923                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6924                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6925                                                 asoc->size_on_reasm_queue -= chk->send_size;
6926                                         } else {
6927 #ifdef INVARIANTS
6928                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6929 #else
6930                                                 asoc->size_on_reasm_queue = 0;
6931 #endif
6932                                         }
6933                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6934                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6935                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6936                                         if (chk->data) {
6937                                                 sctp_m_freem(chk->data);
6938                                                 chk->data = NULL;
6939                                         }
6940                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6941                                 }
6942                                 sctp_free_a_readq(stcb, control);
6943                         }
6944                 }
6945                 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) {
6946 #ifdef INVARIANTS
6947                         if (control->on_strm_q != SCTP_ON_UNORDERED) {
6948                                 panic("Huh control: %p on_q: %d -- not unordered?",
6949                                     control, control->on_strm_q);
6950                         }
6951 #endif
6952                         if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) {
6953                                 /* Yep it is above cum-ack */
6954                                 cnt++;
6955                                 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn);
6956                                 KASSERT(control->length > 0, ("control has zero length"));
6957                                 if (asoc->size_on_all_streams >= control->length) {
6958                                         asoc->size_on_all_streams -= control->length;
6959                                 } else {
6960 #ifdef INVARIANTS
6961                                         panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length);
6962 #else
6963                                         asoc->size_on_all_streams = 0;
6964 #endif
6965                                 }
6966                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6967                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6968                                 if (control->on_read_q) {
6969                                         TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next);
6970                                         control->on_read_q = 0;
6971                                 }
6972                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm);
6973                                 control->on_strm_q = 0;
6974                                 if (control->data) {
6975                                         sctp_m_freem(control->data);
6976                                         control->data = NULL;
6977                                 }
6978                                 sctp_free_remote_addr(control->whoFrom);
6979                                 /* Now its reasm? */
6980                                 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) {
6981                                         cnt++;
6982                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn);
6983                                         KASSERT(chk->send_size > 0, ("chunk has zero length"));
6984                                         if (asoc->size_on_reasm_queue >= chk->send_size) {
6985                                                 asoc->size_on_reasm_queue -= chk->send_size;
6986                                         } else {
6987 #ifdef INVARIANTS
6988                                                 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size);
6989 #else
6990                                                 asoc->size_on_reasm_queue = 0;
6991 #endif
6992                                         }
6993                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6994                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6995                                         TAILQ_REMOVE(&control->reasm, chk, sctp_next);
6996                                         if (chk->data) {
6997                                                 sctp_m_freem(chk->data);
6998                                                 chk->data = NULL;
6999                                         }
7000                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
7001                                 }
7002                                 sctp_free_a_readq(stcb, control);
7003                         }
7004                 }
7005         }
7006         if (cnt) {
7007                 /* We must back down to see what the new highest is */
7008                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
7009                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
7010                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
7011                                 asoc->highest_tsn_inside_map = i;
7012                                 fnd = 1;
7013                                 break;
7014                         }
7015                 }
7016                 if (!fnd) {
7017                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
7018                 }
7019
7020                 /*
7021                  * Question, should we go through the delivery queue? The
7022                  * only reason things are on here is the app not reading OR
7023                  * a p-d-api up. An attacker COULD send enough in to
7024                  * initiate the PD-API and then send a bunch of stuff to
7025                  * other streams... these would wind up on the delivery
7026                  * queue.. and then we would not get to them. But in order
7027                  * to do this I then have to back-track and un-deliver
7028                  * sequence numbers in streams.. el-yucko. I think for now
7029                  * we will NOT look at the delivery queue and leave it to be
7030                  * something to consider later. An alternative would be to
7031                  * abort the P-D-API with a notification and then deliver
7032                  * the data.... Or another method might be to keep track of
7033                  * how many times the situation occurs and if we see a
7034                  * possible attack underway just abort the association.
7035                  */
7036 #ifdef SCTP_DEBUG
7037                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
7038 #endif
7039                 /*
7040                  * Now do we need to find a new
7041                  * asoc->highest_tsn_inside_map?
7042                  */
7043                 asoc->last_revoke_count = cnt;
7044                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
7045                 /* sa_ignore NO_NULL_CHK */
7046                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
7047                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
7048         }
7049         /*
7050          * Another issue, in un-setting the TSN's in the mapping array we
7051          * DID NOT adjust the highest_tsn marker.  This will cause one of
7052          * two things to occur. It may cause us to do extra work in checking
7053          * for our mapping array movement. More importantly it may cause us
7054          * to SACK every datagram. This may not be a bad thing though since
7055          * we will recover once we get our cum-ack above and all this stuff
7056          * we dumped recovered.
7057          */
7058 }
7059
7060 void
7061 sctp_drain()
7062 {
7063         /*
7064          * We must walk the PCB lists for ALL associations here. The system
7065          * is LOW on MBUF's and needs help. This is where reneging will
7066          * occur. We really hope this does NOT happen!
7067          */
7068         VNET_ITERATOR_DECL(vnet_iter);
7069         VNET_LIST_RLOCK_NOSLEEP();
7070         VNET_FOREACH(vnet_iter) {
7071                 CURVNET_SET(vnet_iter);
7072                 struct sctp_inpcb *inp;
7073                 struct sctp_tcb *stcb;
7074
7075                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7076                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7077 #ifdef VIMAGE
7078                         continue;
7079 #else
7080                         return;
7081 #endif
7082                 }
7083                 SCTP_INP_INFO_RLOCK();
7084                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7085                         /* For each endpoint */
7086                         SCTP_INP_RLOCK(inp);
7087                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7088                                 /* For each association */
7089                                 SCTP_TCB_LOCK(stcb);
7090                                 sctp_drain_mbufs(stcb);
7091                                 SCTP_TCB_UNLOCK(stcb);
7092                         }
7093                         SCTP_INP_RUNLOCK(inp);
7094                 }
7095                 SCTP_INP_INFO_RUNLOCK();
7096                 CURVNET_RESTORE();
7097         }
7098         VNET_LIST_RUNLOCK_NOSLEEP();
7099 }
7100
7101 /*
7102  * start a new iterator
7103  * iterates through all endpoints and associations based on the pcb_state
7104  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7105  * assocs and "ef" (optional) is executed when the iterator completes.
7106  * "inpf" (optional) is executed for each new endpoint as it is being
7107  * iterated through. inpe (optional) is called when the inp completes
7108  * its way through all the stcbs.
7109  */
7110 int
7111 sctp_initiate_iterator(inp_func inpf,
7112     asoc_func af,
7113     inp_func inpe,
7114     uint32_t pcb_state,
7115     uint32_t pcb_features,
7116     uint32_t asoc_state,
7117     void *argp,
7118     uint32_t argi,
7119     end_func ef,
7120     struct sctp_inpcb *s_inp,
7121     uint8_t chunk_output_off)
7122 {
7123         struct sctp_iterator *it = NULL;
7124
7125         if (af == NULL) {
7126                 return (-1);
7127         }
7128         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7129                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7130                     SCTP_BASE_VAR(sctp_pcb_initialized));
7131                 return (-1);
7132         }
7133         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7134             SCTP_M_ITER);
7135         if (it == NULL) {
7136                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7137                 return (ENOMEM);
7138         }
7139         memset(it, 0, sizeof(*it));
7140         it->function_assoc = af;
7141         it->function_inp = inpf;
7142         if (inpf)
7143                 it->done_current_ep = 0;
7144         else
7145                 it->done_current_ep = 1;
7146         it->function_atend = ef;
7147         it->pointer = argp;
7148         it->val = argi;
7149         it->pcb_flags = pcb_state;
7150         it->pcb_features = pcb_features;
7151         it->asoc_state = asoc_state;
7152         it->function_inp_end = inpe;
7153         it->no_chunk_output = chunk_output_off;
7154         it->vn = curvnet;
7155         if (s_inp) {
7156                 /* Assume lock is held here */
7157                 it->inp = s_inp;
7158                 SCTP_INP_INCR_REF(it->inp);
7159                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7160         } else {
7161                 SCTP_INP_INFO_RLOCK();
7162                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7163                 if (it->inp) {
7164                         SCTP_INP_INCR_REF(it->inp);
7165                 }
7166                 SCTP_INP_INFO_RUNLOCK();
7167                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7168
7169         }
7170         SCTP_IPI_ITERATOR_WQ_LOCK();
7171         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7172                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7173                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7174                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7175                 SCTP_FREE(it, SCTP_M_ITER);
7176                 return (-1);
7177         }
7178         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7179         if (sctp_it_ctl.iterator_running == 0) {
7180                 sctp_wakeup_iterator();
7181         }
7182         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7183         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7184         return (0);
7185 }